KR20130109183A - Nonwoven fabric and method for producing same, and cleaning material - Google Patents

Abstract

The present invention provides a nonwoven fabric having high wiping performance, a method for producing the nonwoven fabric, and a wiping material. The nonwoven fabric of the present invention is a nonwoven fabric comprising a fibrous aggregate, wherein the nonwoven fabric has a first interlocking portion (12) and a second interlocking portion, and the second interlocking portion is formed by entanglement of constituent fibers of a predetermined portion of the nonwoven fabric Wherein at least one of the first and second interlocking portions has a regular pattern and the first and second interlocking portions are spaced apart from each other in a plurality of rows, Of course.

Description

BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to a nonwoven fabric, a nonwoven fabric, a manufacturing method thereof, and a wiping material,

The present invention relates to a nonwoven fabric, a method for producing the same, and a wiping material.

In order to impart various functions to the nonwoven fabric, nonwoven fabrics given patterns and the like according to the application have been conventionally proposed. Patent Document 1 discloses, for example, a nonwoven fabric which is used in a bandage or the like and has a large number of holes formed almost entirely thereon. In the plurality of holes, holes having various sizes and / or shapes are mixed so as to prevent passage of body fluids and the like. Patent Document 2 discloses a wiping material in which a parallel straight line and an inclined straight line or a curved line are combined. Patent Document 3 discloses, for example, a nonwoven fabric in which research has been conducted to improve its function as a wiping material. In this nonwoven fabric, a row of apertures in which perforated holes are continuously arranged and a row of apertures are alternately present.

Patent Document 4 discloses a wiping material in which a low-density portion and a high-density portion are formed by water flow entanglement and a low entanglement portion is surrounded by a high-strength lock portion.

Japanese Patent Application Laid-Open No. 63-182460 Japanese Unexamined Patent Application Publication No. 10-117981 Japanese Patent Application Laid-Open No. 2000-45161 Japanese Patent Application Laid-Open No. 2006-187313

However, since the nonwoven fabric described in Patent Document 1 has a hole formed on the entire surface of the nonwoven fabric, a mark due to contamination is generated when the nonwoven fabric is used as a wiping material. In the nonwoven fabric described in Patent Document 2, sloping straight lines and curved portions are formed by heat compression, and the fibers are thermally fused and hardened, so there is a demand for improvement in wiping properties. The nonwoven fabric described in Patent Document 3 shows a good scrubbing sound when wiped in a direction orthogonal to the longitudinal direction of the row of holes when used as a wiping material. When the wipes are wiped in the lengthwise direction of the row of holes or in the direction of the oblique line, There is a demand for improvement because the scrape due to the contamination is generated. The wiping material disclosed in Patent Document 4 needs to move a nozzle head having a high weight in order to form a portion with a high intermixed density, and the cost of the equipment is increased, so that improvement is required. In addition, a portion having a high cross-link density (a high-rise portion) is formed by entangling a water flow, and this high-rise portion is a nozzle trace due to a simple water flow, and there is a demand for improvement in terms of functionality and design.

The present invention provides a nonwoven fabric having high wiping performance, a method for producing the nonwoven fabric, and a wiping material to solve the above-described conventional problems.

The nonwoven fabric of the present invention is a nonwoven fabric comprising a fibrous aggregate, wherein the nonwoven fabric has a first interlocking portion and a second interlocking portion, and the second interlocking portion has a regular pattern formed by entanglement of constituent fibers of predetermined portions of the non- Wherein at least one of the first and second interlocking portions maintains an interval of 2 mm or more in width so that one direction of the nonwoven fabric is aligned with the first interlocking portion and the second interlocking portion, And is skewed according to the present invention.

The wiping material of the present invention is characterized by including the nonwoven fabric.

A method of producing a nonwoven fabric according to the present invention is a method of producing a nonwoven fabric by partially entraining a constituent fiber of a fiber aggregate on a predetermined support having regular patterns to arrange a part of the constituent fibers, And a first interlocking portion spaced apart from the second interlocking portion such that a plurality of rows of first interlocking portions are spaced apart from each other, wherein when the water entrained flow forming the second interlocking portion is jetted, the pressurized water flows into the nonwoven fabric through the perforating member And at least one of the first and second engaging portions is formed to be meandering by vibrating the perforated member.

The nonwoven fabric of the present invention has a high wiping performance because the first interlocking portion and the second intermingling portion having regular pattern are spaced apart from each other and exist in a plurality of rows. Also, since at least one of the first and second interlaced portions maintains a gap of 2 mm or more in width and meanders along one direction of the nonwoven fabric, it has high designability as a nonwoven fabric. Further, the wiping material of the present invention can provide a wiping material that exhibits excellent scrubbing sound even when wiped in any direction of the vertical, horizontal, and diagonal directions, and has high wiping performance. Further, in the method of producing a nonwoven fabric of the present invention, the first interlocking portion and / or the second interlocking portion are formed by vibrating the perforated member so that the length and amplitude can be freely set for one cycle of meandering, It is possible to form the meandering first and / or second interlocking portions without generating the curved portions, and to form a meandering pattern that is closer to the curved line.

1A is a cross-sectional explanatory view of a nonwoven fabric manufacturing process in an embodiment of the present invention,
1B is a perspective view thereof.
Fig. 2 is an explanatory diagram of meandering in one embodiment of the present invention. Fig.
3 is a plan view of a nonwoven fabric according to an embodiment of the present invention.
4 is a plan view of a nonwoven fabric according to an embodiment of the present invention.
5 is a plan view of a nonwoven fabric according to an embodiment of the present invention.
6 is a plan view of a nonwoven fabric according to an embodiment of the present invention.
7 is a plan view of a nonwoven fabric of a comparative example.
8 is a plan view of a nonwoven fabric of a comparative example.
FIG. 9A is a plan view of a nonwoven fabric in an embodiment of the present invention, and FIG. 9B is a plan view of a nonwoven fabric in a comparative example.
Fig. 10A is a plan view of a nonwoven fabric in an embodiment of the present invention, and Fig. 10B is a plan view of a nonwoven fabric in a comparative example.
Fig. 11A is a plan view of a nonwoven fabric in an embodiment of the present invention, and Fig. 11B is a plan view of a nonwoven fabric in a comparative example.
12A is a plan view of a nonwoven fabric according to an embodiment of the present invention, and FIG. 12B is a plan view of a nonwoven fabric according to a comparative example.
13 is a plan view of a nonwoven fabric of a comparative example.
FIG. 14 is an explanatory view of the shapes of the first and second interlocking parts in the embodiment of the present invention. FIG.
FIG. 15 is an explanatory view of the shapes of the first, second and third interlocking portions in an embodiment of the present invention. FIG.

In the present invention, the fibrous aggregate is not particularly limited as long as the constituent fibers can be rearranged by water entanglement. For example, a fibrous web, an entangled web, a bonded web, a knitted fabric or a laminate thereof. The fibrous web may be in the form of a web that can be rearranged by water entanglement and is not particularly limited and may be, for example, a card web, an air-lay web, a wet grass web, For example, a spun bond web), a melt-blown web, and the like. The intertwined web is a state in which the fibrous aggregate, particularly the fibrous web, is intertwined. The entanglement of the fibrous web can be controlled by, for example, needle punching method, water flow intercalation method, water vapor (steam jet) However, since the formation of the second entangled part is carried out by intermingling the water flow, it is preferable to perform the water entrainment by the water flow interchange method. As the bonded web, some of the constituent fibers of the fiber aggregate, particularly the fibrous web, are bonded to each other. Examples of the bonding method include an emboss treatment method, an air through method, and a chemical bond method.

The nonwoven fabric of the present invention contains a fiber aggregate as a main component. Here, the main component means a component having a content of 60 to 100 mass% with respect to the total mass of the nonwoven fabric. In the fibrous aggregate, the constituent fibers may be any kind of fibers as long as they are usually used as webs (aggregates in which a plurality of fibers are arranged). For example, natural fibers represented by cotton, hemp, wool, pulp, regenerated fibers represented by rayon, semisynthetic fibers represented by acetate, synthetic fibers such as polyester, polyolefin, nylon and acrylic can be used. In the fibrous aggregate, the fiber length of the fiber is preferably 5 to 110 mm. A more preferable fiber length is 25 to 70 mm. If the fiber length is less than 5 mm, the fiber is not well-entangled. If the fiber length exceeds 110 mm, the strength of the nonwoven fabric is weakened.

The shape of the constituent fibers of the fibrous aggregate used in the nonwoven fabric of the present invention is not particularly limited and examples thereof include single fibers, superfine composite fibers, splittable composite fibers, or fibers having a modified cross section. Examples of the modified cross section include a Y-shaped, a W-shaped, a triangular-shaped polygonal, a star-shaped polygonal, a cruciform, a flat, a multi-branched. In addition, these modified sections may have a rounded outline. If fibers having a modified cross-section are included, the wiping sound of the nonwoven fabric is improved, which is preferable.

The constituent fibers of the fiber aggregate include one kind or two or more kinds of materials. When at least one of the two or more kinds of materials includes a material having a relatively lower melting point than other materials, the constituent fibers can be fused together while maintaining a regular pattern, which is preferable. Here, the case where the constituent fibers are composed of two or more kinds of materials means that the constituent fibers are composed of one kind of constituent fibers, the constituent fibers themselves are composed of two or more kinds of materials, and the case where the constituent fibers are composed of two or more types of constituent fibers . The same applies to the following.

The fineness of the constituent fibers is preferably from 0.1 to 6.6 dtex, more preferably from 0.25 to 3.3 dtex, because water fineness is good and the fibers are not adversely affected and a clear pattern can be formed.

When the nonwoven fabric of the present invention is used as a wiping material, the kind and fineness of the fibers used, the mass per unit area of the nonwoven fabric, and the like may be suitably set according to the use of the wiping material. For example, the nonwoven fabric of the present invention may be used as a wet wiping material such as a floor wiper or a precision wiper for wiping fine dust or dust, a wet wiping material such as a wet tissue, a sweat reducing sheet, , The nonwoven fabric is composed of two components of incompatibility and contains 5% by mass or more of the splittable conjugate fiber in which at least one component is divided into two or more in the cross section of the fibers , More preferably 10 mass% or more. The combination of the two components includes, for example, a combination of nylon and polyester, polyester and polypropylene, ethylene-vinyl alcohol copolymer and polypropylene, polyester and polyethylene. The fineness of these fibers is preferably 3.5 dtex or less for reasons of good scrubbing sound, low fluid retention, and good tendency for water flow interlinkability and patterning.

As the fibers included in the nonwoven fabric other than the split type conjugated fiber, chemical fibers made of a single component can be mentioned. Among them, polyester fibers and rayon fibers having a fineness of 6.6 dtex or less are preferable.

It is preferable that the constituent fibers of the nonwoven fabric contain 5 to 50 mass% of thermally fused thermally fusible fibers. As a result, a nonwoven fabric in which strength and elongation are balanced can be obtained. In addition, the shape stability of the nonwoven fabric is improved, and the decrease in thickness due to use is also suppressed. Such a nonwoven fabric can be provided with a wiper which is easy to wipe and can be lightly wiped without applying force by using an example of the nonwoven fabric of the present invention which is suitable for wipers because it is difficult to elongate and therefore the constituent fibers include heat- have. Such a nonwoven fabric is obtained by heat-treating a fibrous web after a step of expressing a second entangled portion having a predetermined regular pattern to fuse at least a part of the constituent fibers and fuse the constituent fibers together.

The constituent fibers of the nonwoven fabric may contain 10% by mass or more of hydrophilic fibers. More preferably, it is 30 mass% or more. When hydrophilic fibers such as rayon and pulp are contained, the affinity with water is high and the wiping efficiency is improved. Also, when the hydrophilic fibers are contained in the above-mentioned range, the fibers are well-entangled at the time of water entanglement and regular pattern formation is improved.

The nonwoven fabric of the present invention may have a laminated structure of two or more layers. For example, when a layer mainly containing hydrophilic fibers is contained, a wetting wiping material such as a high-quality wet wiper, a wet tissue, or a disposable diaper can be obtained by holding a chemical solution or the like, . Particularly, when the nonwoven fabric has a laminated structure of three or more layers and includes a layer mainly containing hydrophilic fibers such as pulp as an intermediate layer, the layer mainly containing hydrophilic fibers becomes a liquid-absorbent layer, It is preferable. In addition, when a layer mainly containing hydrophilic fibers such as pulp is included as an intermediate layer, it is preferable that regular patterns obtained by the water flow entangling treatment can be clarified. Here, " mainly " means that the hydrophilic fiber is contained in an amount of 50 mass% or more as a main component in a layer mainly containing hydrophilic fibers.

The nonwoven fabric of the present invention has a first interlocking portion and a second interlocking portion, and the first interlocking portion and the second interlocking portion are spaced from each other and exist in a plurality of rows. In the present invention, " the first interlocking portion and the second interlocking portion are separated from each other and exist in a plurality of rows " means that the first interlocking portion and the second interlocking portion exist independently and the first interlocking portion and the second interlocking portion That is, a plurality of independent entangled portions are formed. As will be described later, the second intertwined portion is formed by entanglement of constituent fibers of predetermined portions of the fiber aggregate. On the other hand, the first intertwining portion may be in any of the above-described states of the fibrous aggregate, that is, the state of the fibrous web, the state of the bonded web, the state of the intertwined web, and the like. There is no particular limitation, It is preferable that the constituent fibers are entangled with each other due to the good formability of the second intertwined portion because of good interfacial property or suppression of linting of the fibers due to the strong interlinkage of the fibers as compared with the fibrous web. The entanglement of the fibers may be carried out by any one of the needle punching method, the water-flow delamination method, and the water steam (steam jet) delamination method. However, since the formation of the second entangled part is performed by the water flow entanglement, It is preferable to be carried out by the lock method.

When the first entangled part is entangled by the water stream, the constituent fibers are entangled with the whole of the fiber web including the fiber by a water jet (water jet, hereinafter also referred to as WJ). The WJ treatment is carried out by placing a fiber web on a conveying support body and spraying water on one side or both sides of the web. At this time, the constituent fibers are entangled with each other, and the web is integrated to obtain a nonwoven fabric. The water entraining treatment conditions can be suitably set in accordance with the mass per unit area of the fibrous web, the speed of the conveying support, and the like. For example, an orifice having a pore diameter of 0.05 to 0.5 mm may be sprayed from a nozzle provided at an interval of 0.2 to 1.5 mm at a water pressure of 1 to 20 MPa, respectively, from the front and back sides of the fiber web. More preferably, the water pressure is 1 to 10 MPa. If the water pressure is less than 1 MPa, the entanglement of the fibers becomes insufficient, and the resulting nonwoven fabric may easily lose the lint. If the water pressure exceeds 20 MPa, the interlocking between the fibers becomes too strong, the degree of freedom of the fibers decreases, and the feel of the fabric becomes hard or the quality of the nonwoven fabric may deteriorate. As a result, the portion in which the constituent fibers are entangled (later, the portion other than the portion in which the second entangled portion is later) is defined as the first entangled portion. The first intertwined portions may be subjected to operations such as heat fusion of the constituent fibers by heat treatment as long as they have the effect of the present invention.

Further, the constituent fibers of the predetermined portion of the nonwoven fabric are entangled to form a second entangled portion. It is preferable that this second intertwined portion is entangled by WJ.

The second entangled part has a regular pattern. The regular pattern is a pattern in which the constituent unit constituting the pattern is selected from at least one kind selected from the group consisting of, for example, irregularities and holes, and is made of plain paper. Specifically, examples include dots (circles, ellipses, triangles, polygons, etc.), cubic patterns, plaid patterns, plaid patterns, plaid patterns, and zigzag patterns. It is preferable that the pattern of the second interlaced portion is a pattern different from the pattern of the first interlaced portion. When the second interlocking portion and the first interlocking portion have the same pattern, the first interlocking portion is made to be the convex portion, and when the second interlocking portion and the first interlocking portion have the same pattern, When the second engaging portion is a convex portion, it is possible to form the two engaging portions clearly distinguished by making the first engaging portion a concave portion, thereby making the wiping sound better and absorbing large dust easily. When a thickness irregularity difference is imparted between the second interchanging portion and the first interchanging portion, the thickness difference (irregularity difference) is preferably 0.10 to 3.00 mm, more preferably 0.20 to 2.00 mm, and more preferably 0.30 to 1.00 mm More preferable. The thickness ratio (ruggedness ratio) is preferably 1.03 to 2.00, more preferably 1.05 to 1.70, and further preferably 1.10 to 1.50. Further, by making a difference in the density between the second interlocking portion and the first interlocking portion, it is possible to form two kinds of intertwined portions clearly distinguishable, thereby improving the scratching sound and easily absorbing large dusts. When the difference in density is given between the second and third interlocking portions and the first interchangeable portion, the difference in density is preferably 0.005 to 0.15 g / cm3, more preferably 0.008 to 0.12 g / cm3, and most preferably 0.010 to 0.10 g / Is more preferable. The density ratio is preferably 1.05 to 3.00, more preferably 1.10 to 2.00, and further preferably 1.15 to 1.50.

It is preferable that the first engaging portion has a regular pattern like the second engaging portion and a pattern different from the pattern of the second engaging portion. When the first interlocking part is a regular pattern which is different from the pattern of the second interlaced part, it is preferable that a plurality of the following functions and effects of the regular pattern can be obtained.

Each regular pattern has various functions and effects. For example, a dot pattern or the like in which holes are formed at predetermined intervals contributes to enhancement of removability, and when contacted with the skin, the contact area becomes small, which makes it difficult to attach to the skin. In the three-dimensional pattern, the portion having a relatively high fiber density and the portion having a low fiber density are repeated at a small cycle, so that capillary phenomenon and the like are likely to occur, thereby improving the absorbency of the nonwoven fabric. In addition, since the portions of the three-dimensional pattern having the relatively high density and the low-density portion of the original fiber are oblique, the meandering of the intertwined portions made of the three-dimensional pattern is combined to improve the scratching sound. In the case of an irregular pattern, for example, it is desirable to wipe off marks due to contamination remaining when removing contamination when used as a wiping material. Therefore, if a plurality of patterns are provided, a nonwoven fabric having a plurality of functions can be provided.

As a method for forming such a regular pattern, a support having this regular pattern may be used. The shape of the support is not particularly limited, but a pattern net formed by weaving a monofilament or a metal wire, a roll provided with a projection, or the like can be used arbitrarily. Specifically, there are pattern nets such as plain weave, triple weave, twill weave, and spiral weave, opening plates, and opening rolls.

When the regular pattern is a hole pattern, the area of one hole (hereinafter also simply referred to as hole area) is preferably 0.1 to 6.0 mm 2, more preferably 0.3 to 5.5 mm 2. Further, it is preferable that the distance between the centers of the holes closest to each other (hereinafter also simply referred to as hole distance) is 1.0 to 3.0 mm, more preferably 1.5 to 3.0 mm. In this way, a nonwoven fabric excellent in the ability to remove contamination can be obtained. Further, in the present invention, the distance between the hole area and the center of the hole can be measured using a stereomicroscope as described later.

One preferred structure of the nonwoven fabric of the present invention is a structure in which either one of the first interchanging portion and the second interlinking portion is an unlabeled pattern and the other is a pore pattern. For example, if the first engorgement part has an ignition pattern and the second engaging part has a hole pattern, the stain is removed by the second striking part and removed at the second striking part by this structure, It is possible to wipe it out from the first alternation part. In the nonwoven fabric whose front surface is an irregular pattern, the wiping performance is poor, and in the nonwoven fabric having a hole pattern on the front surface, it is excellent to remove the dirt, but it is impossible to collect all the dirt removed. In the nonwoven fabric of the stripe pattern in which the solid pattern portion and the hole pattern portion are arranged in a linear shape, the wiping property in the direction crossing the length direction of the stripe is good. However, in the longitudinal direction of the stripe or the direction of the oblique line 45, There is a case where the mark remains. In the constitution in which the first interlocking portion and the second interlocking portion meander in one direction of the nonwoven fabric, it is preferable to wipe off from any direction, since no scrape due to contamination remains.

The first and second interlocking portions are spaced from each other and exist in a plurality of rows. Accordingly, since at least two patterns having different functions and effects are provided, a nonwoven fabric having high designability can be obtained as compared with a conventional nonwoven fabric having only one pattern, and even when used as a wiping material, Has excellent scouring voice.

In the nonwoven fabric of the present invention, the first interlocking portion and / or the second interlocking portion meander along one direction of the nonwoven fabric while maintaining a gap of 2 mm or more in width. The nonwoven fabric of the present invention is preferably such that the second intertwined portion meanders along one direction of the nonwoven fabric while maintaining an interval of 2 mm or more in width and the first intertwined portion and the second intertwined portion maintain a gap of 2 mm or more in width, It is more preferable to skew along one direction. The width of the first engaging portion and the width of the second engaging portion indicate the length in the direction orthogonal to one direction of the nonwoven fabric. Further, the first and second interlocking portions may be disconnected in the middle without being continuous. This is the same in the third interlace part, which will be described later, and the third interlace part may not be continuous or interrupted. When the nonwoven fabric is used as a wiping material or the like, the preferred range of the width of the first intertwined portions is 3 to 200 mm, more preferably 3 to 100 mm, still more preferably 3 to 50 mm, ~ 30 mm. A preferable range of the width of the second engaging portion is 3 to 200 mm, more preferably 3 to 100 mm, still more preferably 3 to 50 mm, and particularly preferably 5 to 30 mm. Accordingly, it is possible to provide a nonwoven fabric and a wiping material which exhibit excellent scrubbing sound even when wiped in either the vertical, horizontal or diagonal directions, and have high wiping performance. In addition, since the first interlocking portion and / or the second interlocking portion meander along one direction of the nonwoven fabric, as compared with the nonwoven fabric in which the first interlocking portion and / or the second interlocking portion exist in a straight line along one direction of the nonwoven fabric, A more powerful nonwoven fabric can be obtained. In particular, the stress at 10% elongation in one direction following meander is higher in the nonwoven fabric of the present invention. When the first interlaced portion is a plain pattern, the width of the first interlaced portion is preferably 2 to 10 mm. If the width of the non-woven portion is too large, the removability of the stain becomes deteriorated and the wiping performance as the nonwoven fabric may be deteriorated. When the first interlaced portion is an irregular pattern, the value of the ratio of the width of the first intertwined portion to the width of the second intertwined portion (first interlaced portion / second interlaced portion) in the nonwoven fabric is preferably 0.1 to 4 More preferably from 0.3 to 3, still more preferably from 0.5 to 2. If the value of the ratio of the width of the first intertwined portion to the width of the second intertwined portion is less than 0.1, the wiped mark may remain, and if the ratio exceeds 4, the stain removal property is deteriorated and the wiping sound is worse .

The meandering refers to a case where the entanglement part of the first intertwined part or the second intertwined part does not exist in a straight line along one direction of the nonwoven fabric and exists in a wave form along one direction of the nonwoven fabric. The wavy shape indicates, for example, a shape of a sinusoidal wave, a triangular wave, a rectangular wave, a sawtooth wave, or the like, or a combination thereof. Among them, it is preferable that the shape of the meander is a curve at the turning point of meandering like a sine wave.

The one direction of the nonwoven fabric of the present invention refers to the longitudinal direction of the first and second interlocking portions and can be any one of the machine direction (MD direction) and the width direction (CD direction) as long as the effect of the present invention is secured. But it is preferable that it is parallel to the MD direction. Generally, in the manufacturing process of the nonwoven fabric, the fibrous aggregate is tensioned in the MD direction. Therefore, when the first and second interlocking portions are formed along the MD direction, when the desired intertwined portion width is obtained, It is preferable that the first and second interlocking portions are formed stably, in order to obtain a regular pattern.

The nonwoven fabric of the present invention may include a third interlocking portion in addition to the first interlocking portion and the second interlinking portion. The third intertwined portion may be formed at the same time as the second intertwined portion is formed after the first intertwined portion is formed, or may be formed after the second intertwined portion is formed. The third intertwined portion may be formed so as to intersect with a part of the second intertwined portion, or between the adjacent second intertwined portions (i.e., inside the first intertwined portion), or may be formed inside the second intertwined portion. The third intertwined portion may be skewed along one direction of the nonwoven fabric, may be skewed along a direction different from the one direction of the nonwoven fabric, may be straight along one direction of the nonwoven fabric, or may be straight along the direction different from the one direction of the nonwoven fabric. But it is preferable that the nonwoven fabric meander along one direction. 15 illustrates a nonwoven fabric including a third interlaced portion. As shown in Fig. 15, the third interlaced portion is formed inside the first interlaced portion and is formed so as to intersect with a part of the second interlaced portion have. The widths of the first and second interlocking portions in the case of including the third interlocking portion may be measured at a width assumed in the case where the third interlocking portion is not included. The width of the third interlocking portion is preferably 2 mm or more, more preferably 3 to 50 mm, and further preferably 5 to 30 mm.

The width of the first intertwined portion and the width of the second intertwined portion need not be the same and may be different. In addition, the widths of the plurality of first intertwined portions need not be the same. The widths of the plurality of second interlaced portions are not necessarily the same. The width of the plurality of first interlocking portions or the second interlocking portions of the nonwoven fabric of the present invention may be gradually increased along the CD direction (transverse direction) or MD direction (longitudinal direction) of the nonwoven fabric in order to enhance the designability of the nonwoven fabric. 14A, the width X at the return point of the meandering line (hereinafter also simply referred to as the width X) and the width X at the returning point of the meandering line, as shown in Fig. 14A, It is preferable that the width Y of the other portion (hereinafter also simply referred to as the width Y) is different, and it is more preferable that the width X at the return point of the meandering line is smaller than the width Y of the other portions. Here, " width Y " refers to the maximum width in the direction parallel to the width X in the portion other than the return point as shown in Fig. 14, and the portion other than the return point refers to one width It refers to the part between the return point and the next return point. On the other hand, in the first interchanging portion, it is preferable that the width X at the return point of the meander and the width Y of the other portion are different, and the width X at the return point of the meandering line is greater than the width Y The larger is preferable.

By having different widths in each of the second and third first and second wedge portions and / or the first wedge portion, in all directions such as the length direction of the nonwoven fabric and the direction orthogonal to the longitudinal direction, the second wedge portion and the first wedge portion Functions and effects are mixed, and multifunctionality on the nonwoven fabric surface can be realized. The nonwoven fabric having a different width of each of the second and / or first entangled portions may be formed by spraying a pressurized water stream, which will be described later, on a nonwoven fabric through a perforated member having a predetermined shape, and vibrating the perforated member at this time Lt; / RTI > In addition, since the width Y of the other portion is larger than the width X of the return point in the second bridge portion, the effect due to the regular pattern of the second bridge portion can be further exerted. In the first bridge portion, Since the width X is larger than the width Y, the effect due to the regular pattern of the first interlaced portion can be further exerted. In the case where the constituent fibers of the second intertwined portion are more strongly entangled than the constituent fibers of the first intertwined portion, since the width Y of the other portion than the width X of the return point of the second intertwined portion is large, , The strength of the nonwoven fabric becomes stronger. For example, if the regular pattern of the second interlaced portion is a hole pattern, and the regular pattern of the first interlaced portion is an igniter pattern, at the portion other than the return point of the meander, the removal of the dirt due to the hole pattern becomes higher, A nonwoven fabric is obtained in which the wiping noise of the wiped mark of removed stains is higher.

In the above, the difference | XY | between the magnitudes of the width X and the width Y in the second interchanging portion is preferably 0.2 to 7.0 mm, more preferably 0.5 to 6.0 mm, and further preferably 1.0 to 5.0 Mm, and particularly preferably 1.3 to 5.0 mm. The ratio (Y / X) of the width Y to the width X is preferably 1.05 or more, more preferably 1.20 or more, and further preferably 1.50 or more. Similarly, the difference | XY | between the magnitudes of the width X and the width Y in the first interchanging portion is preferably 0.2 to 7.0 mm, more preferably 0.5 to 6.0 mm, still more preferably 1.0 to 5.0 mm , Particularly preferably 1.3 to 5.0 mm. The ratio (X / Y) of the width X to the width Y is preferably 1.05 or more, more preferably 1.20 or more, and further preferably 1.50 or more.

In the nonwoven fabric of the present invention, the first interlocking portion or the second interlocking portion of the nonwoven fabric may satisfactorily satisfy the above-mentioned range regarding the difference in the magnitude of the width Y and the width X and the ratio in the width Y and the width X. In the nonwoven fabric of the present invention, the portion satisfying the above-mentioned range regarding the width Y and the width X is preferably 50% or more, more preferably 70% or more of the number of return points of the nonwoven fabric as a whole .

The nonwoven fabric of the present invention may be a nonwoven fabric in which the repeating unit in which the widths of the plurality of first intertwined portions sequentially increase toward the direction orthogonal to the longitudinal direction is repeated a plurality of times. The repeating unit that sequentially increases in the direction orthogonal to the longitudinal direction of the width of the plurality of second interlaced portions may be repeated a plurality of times. When the nonwoven fabric is used as a wiping material, the size and kind of the stain that are likely to be trapped are different depending on the width of the first or second intertwined portions. Thus, the nonwoven fabric may have a first wedge portion or a second wedge portion Having a part can wipe out various kinds of contamination, which is desirable.

Further, in the conventional wiping material having the front surface formed with almost no pattern or a large number of holes, the contamination is intensively wiped at the edge portion of the surface of the wiping material that is in contact with the surface to be wiped, The central portion of the surface contacting the wiping surface of the wiping member can not be effectively used for wiping off. On the other hand, when the repeating unit in which the widths of the plurality of first interchanging portions or the second intertwining portions are sequentially increased in the direction orthogonal to the longitudinal direction is repeated a plurality of times, The wiping performance at the central portion of the contacting surface is higher than that of the conventional wiping material made of nonwoven fabric.

As described above, when the widths of the first or second engaging portions are different, the size and type of the contamination that are likely to be captured are different. Therefore, the contamination of the wiping material which is not caught by the first or second wedge portion located at the edge portion of the surface contacting the wiping surface of the body, the floor, or the like enters the inner side than the edge portion, The contamination which is trapped in the first or second collision portion which is positioned on the inner side of the first collision portion or the second collision portion which is positioned and which is not captured by the first collision portion or the second collision portion, And is captured at the first interleave portion or the second interleave portion having a different width located further inside. Therefore, when the nonwoven fabric is a nonwoven fabric in which the repeating units in which the widths of the first interchanging portion or the second interminging portion are sequentially increased in the direction orthogonal to the longitudinal direction thereof are repeated a plurality of times, the widths of the first interchanging portions or the second interminging portions Wiping performance is better than that of the same nonwoven fabric.

In the nonwoven fabric of the present invention, it is not necessary that the widths of all of the first or second intertwined portions included in the nonwoven fabric satisfy the above-described range, and as long as the effect of the present invention is not impaired, A first interlocking portion or a second interlocking portion that is not included in the first interlocking portion may be present. When the number of the first wedge portions or the second wedge portions having a width in the above range of the first wedge portion or the second wedge portion included in the nonwoven fabric of the present invention is 50% or more as the wiping material , It is preferable since it exhibits a better scrubbing sound. More preferably, it is 70% or more.

The meandering of the second interlaced portion is preferably such that the length of the meander (i.e., the wavelength) per cycle is 5 mm or more. 2, the length of meandering of the second interlaced portion per one cycle is set to a direction 32 (orthogonal direction) orthogonal to the one direction 31 in which the second interleave portion 42 meanders, A point at which the meandering progress direction (assumed to be the forward direction) in the forward direction is changed to the direction 180 degrees (the reverse direction) in the forward direction is represented by point e, and a point at which the meandering direction is changed from the forward direction to the reverse direction is assumed to be the point f The length I in the one direction 31 of a straight line in the orthogonal direction 32 including the point e and a straight line in the orthogonal direction 32 including the point f is defined as Point. When the part where the meandering changes from the forward direction to the backward direction exists in a straight line parallel to the one direction 31 (for example, in the case of a meandering like a rectangular wave), the midpoint of the straight line is defined as a point changing from the forward direction to the reverse direction. If the use form is the same size as the wiping material, the upper limit of the wavelength is preferably 200 mm. The wavelength is more preferably a period of 10 to 150 mm, and more preferably 30 to 100 mm. This facilitates the setting of the wiping device. It is preferable that the meandering of the second interlaced portion has an amplitude of 1 mm or more. 2, when the point at which the above-described meandering changes from the forward direction to the backward direction is a point g, and the point where the meandering direction changes from the reverse direction to the forward direction is defined as a point h, the amplitude g And the length J in the orthogonal direction 32 of the straight line of the one direction 31 including the point h and the straight line of the one direction 31 including the point h. Here, the point g and the point h are located at the midpoint of the width of the second interlaced portion. If the use form is the same size as the wiping material, the upper limit of the amplitude is preferably 200 mm. The amplitude is more preferably 2 to 150 mm, still more preferably 5 to 100 mm, and particularly preferably 10 to 50 mm. When the amplitude is 15 to 30 mm, the scratch sound is most greatly improved, which is preferable. The meandering of the second interlaced portion may be different for each period of the length per cycle, may be different for each period, may be different for each amplitude as a decay wave, and may be a case where the meandering is repeated regularly, Are the same in length and have the same amplitude, that is, the same pattern. The value (wavelength / amplitude) of the ratio of the length (wavelength) to the amplitude per one cycle of meandering is preferably 1 to 15. A more preferred range is 1.5 to 12, and a more preferable range is 2 to 8. If the value of the ratio of the wavelength and the amplitude is less than 1, the second entangled portion approaches the nonwoven fabric existing in a straight line in the orthogonal direction, and the scratch sound may be lost. If the value of the ratio of the wavelength to the amplitude is more than 15, the second entangled portion approaches the nonwoven fabric existing in a straight line in one direction of the nonwoven fabric, and the wiping sound sometimes falls off. In Fig. 2, the adjacent second interchanging portions or the first interchanging portions are shown to have the same quadrature phase. As shown in Fig. 14B, the adjacent second interchanging portions or the first interchanging portions The phase of meandering may be deviated.

In the WJ treatment for forming the meandering second interlocking portion in the present invention, there are a method of forming a support body using a support capable of forming a squarish pattern, a method of forming a nozzle having a group of orifices composed of one or more orifices A method in which the nozzle is vibrated and the nozzle is vibrated by using the nozzle provided with the orifice group at the predetermined interval, a method in which the conveying support body is vibrated without vibrating the nozzle, A method of spraying the nonwoven fabric through a member and vibrating the perforated member at this time.

In the method of forming a support using a support capable of forming a serpentine pattern, it is preferable to use a support in which the width of the first engagements or the second engagements is increased. For example, it is preferable to use a support having a width of 2 mm or more in the width of the first interchanging portion or the second intertwining portion, more preferably 3 to 50 mm, further preferably 5 to 30 mm . The water entraining treatment conditions in this method can be suitably set in accordance with the mass per unit area of the fibrous web and the speed of the conveying support. For example, the orifices having a hole diameter of 0.05 to 0.5 mm may be sprayed one to four times from the front and back surfaces of the fiber web, respectively, with a water pressure of 1 to 20 MPa from nozzles provided at intervals of 0.2 to 1.5 mm. More preferably, the water pressure is 1 to 10 MPa. If the water pressure is less than 1 MPa, the entanglement of the fibers becomes insufficient, and the resulting nonwoven fabric may easily lose the lint. If the water pressure exceeds 20 MPa, the interlocking between the fibers becomes too strong, the degree of freedom of the fiber is lowered, the feel of the fabric becomes hard, and the quality of the nonwoven fabric may deteriorate.

In the method of vibrating the nozzle by using a nozzle in which a group of orifices composed of one or more orifices is provided at a predetermined interval, a second engaging portion is formed by the flow of the orifice group, The interval is preferably 2 mm or more, more preferably 3 to 50 mm, and further preferably 5 to 30 mm. The width of one orifice group is preferably 2 mm or more, more preferably 3 to 50 mm, and further preferably 5 to 30 mm. The number of orifices included in one orifice group is preferably two or more. If the number of orifices is 2 or more, the ratio of the regular pattern of the second interlaced portions to the simple nozzle marks can be reduced. When the orifice group is composed of two or more orifices, the interval between adjacent orifices in the orifice group is preferably 0.2 to 1.5 mm. The water entraining treatment conditions may be such that the water jet of 1 to 20 MPa of water pressure is jetted from the nozzles 1 to 4 times from the front and back sides of the fibrous web. More preferably, the water pressure is 1 to 10 MPa. If the water pressure is less than 1 MPa, the entanglement of the fibers becomes insufficient, and the resulting nonwoven fabric may easily lose the lint. If the water pressure exceeds 20 MPa, the interlocking of the fibers becomes too strong, the degree of freedom of the fiber is lowered, the feel of the fabric becomes hard, and the quality of the nonwoven fabric becomes poor.

In a method of using a nozzle provided with a group of orifices at a predetermined interval to vibrate a conveying support without vibrating the nozzle, a nozzle in which a group of orifices consisting of one or more orifices are provided at predetermined intervals is used And the same nozzle as the method of vibrating and forming the nozzle may be used. In addition, the conditions for the water entraining treatment may be the same.

The method of forming the meandering second engaging portion by vibrating the perforating member is different from the method of forming by using the supporting member capable of forming the serpentine pattern so that the speed or width of oscillation of the perforating member and the conveying speed of the conveying supporting member are changed So that the length, the amplitude, and the like can be set freely per one cycle of meandering, which is preferable. In addition, in the method of forming using a support capable of forming a skew pattern, a flow of water is applied to the entire surface of the nonwoven fabric, so that it is difficult to obtain a difference in thickness and density between the first and second wedge portions. In addition, the method of vibrating the perforated member is more advantageous than the method of vibrating the nozzle in which the orifice group is provided at a predetermined interval, because the perforated member is light in weight compared to the nozzle. So that it is possible to smoothly move, especially at the turning point of the vibration. Further, for example, when a squarish pattern having a curved line similar to that of a sinusoidal wave at the return point is formed as a squat pattern, motion at the turning point of the amplitude can not be made smooth in the nozzle vibration, . In the vibration of the perforated member, a quadrangle closer to the curved line can be formed, which is preferable. The method of vibrating the perforated member is preferable because it is possible to form a meandering second engaging portion without causing wrinkles in the nonwoven fabric, as compared with a method of vibrating the conveying supporting body. Also, in the method of forming the meandering second engaging portion by vibrating the perforated member, a nozzle in which the orifice group composed of the at least one orifice is provided at a predetermined interval can be used.

In the method of forming the meandering second engaging portion by vibrating the perforating member, the perforating member having a plurality of holes is provided between the nozzle for injecting the pressurized water and the first entangled fibrous aggregate, A water stream is jetted onto the fiber aggregate and a part of the constituent fibers of the fiber aggregate is rearranged by pressurized water passing through the hole portion of the perforated member to form a second interlaced portion having a regular pattern. Since the plurality of holes of the perforated member exist at a predetermined interval and the pressurized water does not pass through the perforated member at the portion without the perforated member, . In this way, the first and second interlocking portions are formed so as to be spaced apart from each other and in a plurality of rows. At this time, by moving the fiber aggregate together with vibrating the perforated member, the second engaging portion and / or the first engaging portion can be formed so as to meander.

The perforation member may be any member having a plurality of holes. For example, the material may be a synthetic resin or a metal, and the shape may be appropriately selected in accordance with the manufacturing apparatus of the WJ process such as plate shape or roll shape . The weight of the perforated member is preferably 20 kg or less, and more preferably 1 to 15 kg. The mass per unit area of the perforated member is preferably 5 g / cm 2 or less, and more preferably 0.1 to 3.5 g / cm 2.

It is preferable that the width of the plurality of holes included in the perforated member in the direction of vibrating the perforated member is 2 mm or more, more preferably 3 to 50 mm, and still more preferably 5 to 30 mm. The interval between adjacent holes included in the perforated member is preferably 2 mm or more, more preferably 3 to 50 mm, and still more preferably 5 to 30 mm. The shape of the hole may be any shape, for example, a circular shape, a semicircular shape, an elliptical shape, a polygonal shape such as a triangular shape or a square shape, a star shape polygonal shape, a cross shape, a slit shape such as a straight shape or a curved shape.

The vibration direction of the perforated member may be appropriately selected in the MD direction, the CD direction, the oblique direction, and the like. Here, the oblique direction means that the angle is in the range of more than 0 degrees and less than 90 degrees from the MD or CD direction along the surface direction of the nonwoven fabric. From the viewpoint of simplicity in manufacturing, it is preferable that the vibration direction is a direction in which the angle is in the range of more than 0 degrees and not more than 45 degrees from the CD direction or the CD direction. The term " vibration " refers to reciprocating the perforated member along a certain direction, and includes the case of reciprocating on a straight line, the case of reciprocating along an elliptical orbit having a long axis in a certain direction, and the like. The vibration direction of the perforated member and the longitudinal direction of the perforated member may be parallel or not parallel, and the angle between the longitudinal direction and the vibration direction of the perforated member may be changed during vibration.

The vibration speed of the perforated member can be increased to about 100 m / min. On the other hand, when the nozzle is vibrated, the vibration speed can only be increased to about 10 m / min if the apparatus is based on the cost of the identification degree. By increasing the vibration speed of the perforated member, the difference between the width X at the return point of the interlocking portion of the first interlocking portion, the second interlocking portion, and the like and the width Y other than that can be increased.

The distance between the perforated member and the nozzle is preferably 1 mm or more, and the distance between the perforated member and the orifice is preferably 30 mm or less, and the distance between the perforated member and the fibrous aggregate is preferably 5 to 50 mm. If the distance between the puncturing member and the nozzle is less than 1 mm, the puncturing member and the nozzle may come in contact with each other and damage one or both sides. If the distance between the perforated member and the fibrous aggregate is less than 5 mm, the perforated member and the fibrous aggregate may contact each other to damage the fibrous aggregate. If the distance between the perforated member and the orifice exceeds 30 mm, or if the distance between the perforated member and the fibrous aggregate exceeds 50 mm, the energy of the water stream may decrease and the intercalation may become insufficient.

The water flow entanglement treatment conditions in the method of forming the meandering second entangled part by vibrating the perforated member can be appropriately set in accordance with the mass per unit area of the fibrous web and the speed of the conveying support. For example, an orifice having a pore diameter of 0.05 to 0.5 mm may be sprayed from a nozzle provided at an interval of 0.2 to 1.5 mm at a water pressure of 1 to 20 MPa, respectively, from the front and back sides of the fiber web. More preferably, the water pressure is 1 to 10 MPa. If the water pressure is less than 1 MPa, the entanglement of the fibers becomes insufficient, and the resulting nonwoven fabric may easily lose the lint. If the water pressure exceeds 20 MPa, the interlocking between the fibers becomes too strong, and the degree of freedom of the fibers is lowered, and the feel of the nonwoven fabric may deteriorate.

The nonwoven fabric according to the present invention is suitably used as a wiping material. The nonwoven fabric according to the present invention is suitably used as a wiping material. The wiping material of the present invention is not limited to the absorbent article (particularly, the topsheet and the secondary sheet), the gauze, the face mask, , Wallpaper, and the like. In applications such as gauze, bandages, cushioning materials, and wallpaper, the nonwoven fabric of the present invention can exhibit excellent designability. In the applications such as a tablecloth, a mat, and a backing material of a carpet, since the first and second entangled portions are meandering along one direction of the nonwoven fabric while keeping a predetermined gap, the nonwoven fabric is provided with non- It is possible to impart the anti-slip property to all directions because it is meandering. In the use of the absorbent article or the like, the flow of the liquid on the surface of the nonwoven fabric can be suppressed by the structure in which the first and second entangled portions are meandering along one direction of the nonwoven fabric while maintaining a predetermined gap therebetween, Leakage of the liquid can be suppressed. In applications such as a face mask and a filter, a plurality of functions can be provided by having a separate function in the first and second interchanging parts. For example, the filter has a function of high filtration accuracy on one side and a function of high filtration life on the other side.

The following description will be made with reference to the drawings. 1A is a cross-sectional explanatory view of a nonwoven fabric manufacturing process according to an embodiment of the present invention, and FIG. 1B is a perspective view thereof. This water entraining treatment apparatus 10 is characterized in that the perforated member 2 is disposed on the first entangled nonwoven fabric 3 placed on the conveying support body 4 and the first entangled nonwoven fabric 3 is subjected to high pressure (Water jet: WJ) (1). At this time, as shown in Fig. 1B, the perforated member 2 is moved in the width direction (CD direction) 8a, 8b of the nonwoven fabric. The water stream WJ1a ejected from the water nozzle 7 passes through the hole 2a of the perforated member 2 and impinges on the nonwoven fabric 3 to form a second interlaced portion. The portion of the water stream 1b which does not pass through the perforated member 2 does not reach the nonwoven fabric 3 and therefore the corresponding portion of the nonwoven fabric 3 remains as the first interlocking portion. After the WJ treatment, the nonwoven fabric is dried and wound. In order to make the nonwoven fabric a wiping material, it is cut into a predetermined size.

Figs. 3 to 6, Figs. 9A, 10A, 11A and 12A are plan views of the nonwoven fabric in the embodiment of the present invention. The nonwoven fabric 11 of Fig. 3 is composed of a first wedge portion 12 and a second wedge portion 13 and has a width of 2 mm or more of the first wedge portion 1, a width of the second wedge portion 2 (MD direction) of the nonwoven fabric while maintaining an interval of 2 mm or more. The nonwoven fabric 14 of Fig. 4 is the same as Fig. 3 except that the first and second interchanging parts 15 and 16 are formed. The nonwoven fabric 17 of Fig. 5 is the same as that of Fig. 3 except that the first interchanging portions 18a and 18b and the second interchanging portions 19a and 19b are formed. The nonwoven fabric 20 of Fig. 6 is the same as Fig. 3 except that the first interchanging portions 21a and 21b having different widths and the second interchanging portions 22a and 22b are formed. The nonwoven fabric 50 of Fig. 9A has first and second overlapping portions 51a and 51b of an irregular pattern and second overlapping portions 52a and 52b of a pore pattern. The first overlapping portions 51a and 51b, The lock portions 52a and 52b meander along the machine direction (MD direction) of the nonwoven fabric while maintaining a gap of 3 mm wide, 3 mm wide, 3 mm wide and 20 mm wide. In the hole pattern shown in Fig. 9A, one hole area is 1.05 mm < 2 >, and the distance between centers of holes closest to each other is 1.5 mm. The nonwoven fabric 70 shown in Fig. 10A has first and second overlapping portions 71a and 71b of an irregular pattern and second overlapping portions 72a and 72b of a hole pattern and has a hole area of 4.8 mm & 9A except that the distance between the centers of the closest holes is 2.3 mm. The nonwoven fabric 90 of Fig. 11A has first and second overlapping portions 91a and 91b of an igniter pattern and second overlapping portions 92a and 92b of a cubic pattern. The first overlapping portions 91a and 91b, The lock portions 92a and 92b meander along the machine direction (MD direction) of the nonwoven fabric while maintaining a gap of 3 mm wide, 3 mm wide, 3 mm wide and 20 mm wide. The nonwoven fabric 110 of Fig. 12A has a first wedge portion 111 of an ignoreness pattern, a second wedge portion 112 of a hole pattern, and a third wedge portion 113 of an igniter pattern, and the first wedge portion 111 And the second interchanging portion 112 are meandering along the machine direction (MD direction) of the nonwoven fabric while maintaining a gap of 3 mm width and 3 mm width, respectively.

7, 8, 9B, 10B, 11B, 12B and 13 are plan views of the nonwoven fabric of the comparative example. In the nonwoven fabric 23 shown in Fig. 7, the first and second interchanging portions 24 and 25 are formed in a straight line. In this nonwoven fabric, the wiping property remains unfavorable. The nonwoven fabric 26 of FIG. 8 is a nonwoven fabric in which a hole is formed by performing WJ on the whole surface as a second entangling treatment. In this nonwoven fabric, the marks wiped in three directions remain and the wiping property is not preferable. The nonwoven fabric 60 shown in Fig. 9B has the first wedge portions 61a and 61b of the irregular pattern and the second wedge portions 62a and 62b of the hole pattern and the first wedge portions 61a and 61b, 9A except that the lock portions 62a and 62b are all formed in a straight line. The nonwoven fabric 80 of Fig. 10B has first flange portions 81a and 81b of an irregular pattern and second flange portions 82a and 82b of a hole pattern, and the first flange portions 81a and 81b, 10A except that the lock portions 82a and 82b are all formed in a straight line. The nonwoven fabric 100 shown in Fig. 11B has first and second overlapping portions 101a and 101b of an igniter pattern and second overlapping portions 102a and 102b of a cubic pattern. The first overlapping portions 101a and 101b, 11A except that the locking portions 102a, 102b are all formed in a straight line. The nonwoven fabric 120 of Fig. 12B has a first wedge portion 121 of an ignoreness pattern, a second wedge portion 122 of a hole pattern, and a third wedge portion 123 of an igniter pattern, and the first wedge portion 121 ) And the second interchanging part 122 are all formed in a straight line. The nonwoven fabric 130 of Fig. 13 is a nonwoven fabric in which WJ is applied to the whole surface as a second entangling treatment, and the main pattern is formed.

Example

Hereinafter, the contents of the present invention will be described with reference to examples. The present invention is not limited to these examples.

The physical properties of the nonwoven fabric obtained in Examples and Comparative Examples were measured as follows.

(1) Thickness of the entire nonwoven fabric

Using a non-woven fabric thickness gauge (trade name " THICKNESS GAUGE ", model: CR-60A, manufactured by Daihakakasei Co., Ltd.), a load of 3 g per 1 cm 2 of the sample was added in accordance with JIS L 1096 did.

(2) Breaking strength, breaking extension

A sample piece having a width of 5 cm and a length of 15 cm was grasped so that the gap of the chuck was 10 cm in accordance with JIS L 1096 and a constant speed stretching type tensile tester (trade name " Tensilon UCT-1T ", manufactured by Orientech Corporation) And the sample piece was stretched at a tensile speed of 30 cm / min. The load value and elongation at break were measured as break strength and elongation at break, respectively.

(3) Stress at 10% elongation

The load value at 10% elongation at the time of tenacity tenacity measurement, that is, the load value at the time of 1 cm elongation at the measurement start point (the load value when the interval (10 cm) between the chucks became 11 cm) .

(4) Mass per unit area

 A test piece was taken in accordance with JIS L 1096, and the mass of each test piece was measured to determine the mass per square meter (g / m 2).

(5) Density

Density was calculated from thickness and mass per unit area.

(6) Hole area

(Magnification: 50 times) the surface of the nonwoven fabric using a stereomicroscope (trade name " SZX12 ", manufactured by Olympus Corporation) under an environment in which temperature and humidity were kept constant, From the plain paper, portions corresponding to any five holes were cut out. The hole area was calculated from the mass per unit area of the cut paper, and the average value of these values was divided by the observed enlargement factor to obtain the hole area.

(7) Distance between adjacent holes

The surface of the non-woven fabric was magnified (enlarged magnification: 50 times) using a stereoscopic microscope (trade name " SZX12 ", manufactured by Olympus Corporation), and 10 points between the holes regularly adjacent in the obtained image were measured. The distance between adjacent holes was calculated by dividing by the observed magnification. However, the center-to-center distance between adjacent holes is defined as the distance between holes.

(8) Pollution wiping test

An acrylic resin plate having a corner of 30 cm was attached to a device having an inclination angle of 40 °. The center of the acrylic resin plate was painted with lipstick (product name "DIOL316") with a length of 3 mm and a width of 60 mm. The nonwoven fabric sample was cut at the edge of 10 cm and the impregnation rate was 250% with distilled water. Next, the nonwoven fabric sample was wound on a metal flat plate (60 mm in length, 170 mm in width) of 1040 g, and fixed with an adhesive tape. The nonwoven fabric sample attached to the metal plate was slid down on the acrylic resin plate to wipe the lipstick. The number of times until the lipstick was erased in the direction of MD, CD and oblique line (MD or CD) of the nonwoven fabric at an angle of 45 degrees) was measured.

(Example 1)

The first component was changed to polyethylene terephthalate (melting point 253 ° C) and the second component was changed to high-density polyethylene (trade name, manufactured by Mitsubishi Rayon Co., Ltd.) with 80% by mass of solvent radial rayon fiber (fineness 1.7 dtex, fiber length 40 mm, 10 parts by mass of a splittable conjugate fiber having a cross-sectional shape divided into eight radially (melting point 132 占 폚) (fineness 2.2 dtex, fiber length 51 mm, trade name "DFS (SH)", manufactured by Daiwa Polytec KK) Core type conjugate fiber (fineness: 2.2 dtex, fiber length: 51 mm, trade name: NBF (H)) having polyethylene as the primary component (melting point: 132 ° C) and poly 10% by mass) were mixed and carded using a roller-type parallel card to prepare a carded web having a mass per unit area of 55 g / m 2.

Subsequently, the carded web was placed on the net for the first interchange, and at the speed of 4 m / min, water was applied to the surface of the carded web with orifices having a hole diameter of 0.13 mm at intervals of 0.6 mm Using a feeder, a columnar water flow of 2.5 MPa in water pressure was injected, and a columnar water flow of 2.0 MPa in water pressure was sprayed on the back surface of the same using a water feeder. The distance between the surface of the carded web and the orifice was 15 mm. The first entangled fiber web was thus obtained. In the net for the first interchange, the pattern of the first interlaced portion was made to be an irregular pattern by using a plain PET net having a warp diameter of 0.132 mm, a weft line diameter of 0.132 mm, and a mesh number of 90 mesh.

Next, a second interlacing process was performed. 1A-B, a perforated member 2 made of an acrylic resin is disposed on the first interlaced nonwoven fabric 3, the water stream WJ1a is passed through the hole 2a of the perforated member 2, 2 engagements were formed. At this time, the perforated member 2 was vibrated in the width direction (CD direction) of the nonwoven fabric. The nonwoven fabric after WJ treatment was dried and wound. The drying temperature was dried and heat-treated in a dryer at an ambient temperature of 140 캜 to obtain a nonwoven fabric of Example 1.

The proceeding speed when performing the second engagement was 4 m / min and the water pressure was 4.0 MPa. Further, in the acrylic plate having the length in the MD direction of 14.5 mm, the length in the CD direction of 70 mm, and the thickness of 5 mm, the perforated member had a width of 3 mm in the MD direction and a width of 3 mm in the CD direction , The distance between the nozzle and the perforated member is 1 mm, the distance between the surface of the fiber web and the orifice is 21 mm, and the distance between the perforated member and the nonwoven fabric is 15 mm. Mm. In the net for the second interchange, a plain weave net having a warp diameter of 0.132 mm, a weft line diameter of 0.132 mm, and a mesh number of 25 mesh was used so that a regular pattern became a hole pattern. The vibration of the perforated member was vibrated in the range of 10 mm width in the CD direction, and the vibration speed was 0.8 m / min. The obtained nonwoven fabric was a corrugated stripe having a meandering width of 3 mm and a hole width of 3 mm (one hole area of 1.05 mm 2, a distance between the centers of the closest holes of 1.5 mm) (Wavelength) 100 mm and amplitude 10 mm per cycle of the waveform stripe meandering.

(Comparative Example 1)

In the second entangling process, a nonwoven fabric was produced in the same manner as in Example 1 except that the waveform stripe was a linear stripe having a plain width of 3 mm and a hole width of 3 mm as shown in Fig.

(Comparative Example 2)

In the second entangling treatment, a nonwoven fabric was produced in the same manner as in Example 1 except that the corrugated stripes were the front holes shown in Fig.

(Comparative Example 3)

A nonwoven fabric was produced in the same manner as in Example 1 except that the second entangling treatment was not performed.

(Example 2)

The same procedure as in Example 1 was carried out except that in the second entanglement processing, the vibration width of the perforated member was 20 mm in the CD direction, the vibration speed was 1.6 m / min, and the waveform stripe was 100 mm in wavelength and 20 mm in amplitude To prepare a nonwoven fabric.

(Example 3)

In the second entangling treatment, a nonwoven fabric was produced in the same manner as in Example 1 except that the vibration speed of the perforated member was 1.1 m / min and the waveform stripe was 70 mm in wavelength and 10 mm in amplitude.

(Example 4)

In the second entanglement process, the perforated member used in Example 1 was the same as the perforated member in shape and size, and the interval between adjacent holes was 3 mm and 20 mm, The same procedure as in Example 1 was carried out except that a pattern having a hole width of 3 mm, a plain width of 3 mm, a hole width of 3 mm and a plain width of 20 mm as shown in Fig. 6 was used and the waveform stripe was changed to a wavelength of 100 mm and an amplitude of 10 mm Nonwoven fabric was produced.

(Example 5)

In the second entanglement process, using the fact that holes having a size of 3 mm and a pitch of 20 mm exist at intervals of 3 mm, the vibration width of the perforated member is set to 20 mm in the CD direction and the vibration velocity is set to 1.14 m / min, and the pattern is a pattern having a plain width of 3 mm, a hole width of 3 mm, a plain width of 3 mm, and a hole width of 20 mm as shown in Fig. 9A and a waveform stripe of 140 mm in wavelength and 20 mm in amplitude A nonwoven fabric was produced in the same manner as in Example 1. The width X was 2.3 mm, the width Y was 3.0 mm, the difference in width | XY | was 0.7 mm, the ratio of the width Y / X was 1.30, and the width of the hole 20 mm The width X is 18.9 mm, the width Y is 20.0 mm, the difference in width | XY | is 1.1 mm, the ratio of the width Y / X is 1.06, and the width X in the first interchanging portion is The width Y was 2.2 mm, the difference in width | XY | was 1.1 mm, and the ratio of width X / Y was 1.50. Here, the width is the width measured in the direction (CD direction) orthogonal to the meandering direction (MD direction), and the same is applied to the following description.

(Example 6)

10A, a hole area of 4.8 mm < 2 >, a distance between the centers of the holes closest to each other was 2.3 mm, a line width of the warp yarn was 1.2 mm, A nonwoven fabric was produced in the same manner as in Example 5, except that plain weave net having a weft line diameter of 1.2 mm, warp density of 12 pcs / inch and weft density of 12 pcs / inch was used. The width X was 3.0 mm, the width Y was 3.4 mm, the difference in width | XY | was 0.4 mm, the ratio of the width Y / X was 1.13, and the width of the hole 20 mm The width X is 19.0 mm, the width Y is 20.4 mm, the difference in width | XY | is 1.4 mm, the ratio of the width Y / X is 1.07, and the width X in the first interleave portion is The width Y was 3.0 mm, the difference in width | XY | was 0.6 mm, and the ratio of width X / Y was 1.20.

(Example 7)

In the second interlacing process, using a 3/1 multifunctional net having a warp diameter of 0.4 mm, a warp diameter of 0.8 mm and a knitting density of 68/18 yarns / inch on the net for the second interchange, Was prepared in the same manner as in Example 5, except that the pattern had a plain width of 3 mm / a width of 3 mm / width of 3 mm / plain width of 3 mm / width of 20 mm, and a waveform stripe of 140 mm in wavelength and 20 mm in amplitude Nonwoven fabric was produced. The second wedge having a width of 3 mm and a width of 3 mm had a width X of 2.0 mm, a width Y of 3.0 mm, a difference in width | XY | of 1.0 mm, a width ratio Y / X of 1.50, The width X is 18.8 mm, the width Y is 20.6 mm, the difference in width | XY | is 1.8 mm, the ratio of width Y / X is 1.10, and the width X in the first overlap portion is The width Y was 3.0 mm, the difference in width | XY | was 0.6 mm, and the ratio of width X / Y was 1.20.

(Comparative Example 4)

A nonwoven fabric was produced in the same manner as in Example 1, except that the corrugated stripe was a front hole (one hole area: 4.8 mm 2, the distance between the centers of the closest holes was 2.3 mm).

(Comparative Example 5)

In the second entangling treatment, a nonwoven fabric was produced in the same manner as in Example 1 except that the waveform stripe was a front-end three-way as shown in Fig.

(Comparative Example 6)

In the second entangling treatment, a nonwoven fabric was produced in the same manner as in Example 5 except that the waveform stripe was a linear stripe as shown in Fig. 9B.

(Comparative Example 7)

In the second entanglement processing, a nonwoven fabric was produced in the same manner as in Example 6 except that the waveform stripe was a linear stripe as shown in Fig. 10B.

(Comparative Example 8)

In the second entanglement processing, a nonwoven fabric was produced in the same manner as in Example 7 except that the waveform stripe was a linear stripe as shown in Fig. 11B.

(Example 8)

In the second interlacing process, the concave portion is formed as a concave portion through which water flows through the perforated member using the same net as the net used in the first interlacing process, and the other portion is formed as a convex portion, The vibration velocity was 3.2 m / min, the difference between the thicknesses of the convex portion and the concave portion was 0.12 mm, the width of the convex portion was 3 mm, the width of the convex portion was 3 mm, and the width of the concave portion was 3 mm. , And the amplitude was changed to 20 mm, a nonwoven fabric was produced in the same manner as in Example 1. The ratio of the thickness of the convex portion to the concave portion was 1.20, the difference in density between the convex portion and the concave portion was 0.018 g / cm3, the density ratio (density ratio / density smallness) was 1.20, The width X is 1.6 mm, the width Y is 3.0 mm, the difference in width | XY | is 1.4 mm, the ratio of the width Y / X is 1.88, and the width X in the first overlap portion of the 3 mm convex portion is The width Y was 3.0 mm, the difference in width | XY | was 1.6 mm, and the ratio of width X / Y was 1.53. Here, the thickness and the density are measured by preparing a sample of a predetermined area, separating the convex portion and the concave portion with respect to the thickness, collecting only the convex portion or the concave portion, measuring them by the same method as the above- did. Next, with regard to the mass per unit area, the weight was measured by collecting only the convex portion or the concave portion, and the mass per unit area was obtained by multiplying the predetermined area by the ratio of the area of the convex portion or the concave portion. The density was calculated from the above thickness and mass per unit area.

(Example 9)

In the second entangling treatment, the orifices having a pore diameter of 0.13 mm are provided at intervals of 0.6 mm as nozzles. Some orifices in a plurality of orifices are prevented from flowing water, , And the width of each of the closed portion and the blank portion was 24 mm, the vibration width of the perforated member was 20 mm in the CD direction, the vibration speed was 3.2 m / min, A pattern having a width of 3 mm / width of 3 mm and a width of 3 mm of blending pattern width of 24 mm / a blind width of 24 mm as shown in Fig. 5A, and the waveform stripe in the blending pattern was 50 mm in wavelength and 20 mm in amplitude, A nonwoven fabric was produced in the same manner as in Example 1 except that 24 mm was a linear stripe. Further, in the second bending portion of the 3 mm bore width, the width X is 2.8 mm, the width X in the first bending portion is 3.0 mm, and the second bending portion and the first bending portion The width Y was not measured.

(Comparative Example 9)

In the second entanglement processing, a nonwoven fabric was produced in the same manner as in Example 9 except that the waveform stripe in the mixing pattern was a linear stripe as shown in Fig. 12B.

The physical properties of the obtained nonwoven fabric of Examples and Comparative Examples and the results of cleaning tests are summarized in Table 1 below.

[Table 1]

The nonwoven fabric of Example 1 did not depend on the wiping direction, exhibited a satisfactory wiping sound, and no wiping marks due to contamination remained. On the other hand, in the nonwoven fabric having a hole pattern on the whole surface of Comparative Example 2, the removal of stain was good, but the stain caused by the stain remained in all directions of MD, CD and oblique lines. In the nonwoven fabric of which the front surface of Comparative Example 3 was an unlabeled pattern, no wiping marks remained, but the removability was not sufficient, and the wiping properties fell to Example 1. [ Further, in the nonwoven fabric having a hole pattern and an irregular pattern of Comparative Example 1 and formed in a straight line, the removability was good, and the marks wiped from the MD direction remained although there was no mark wiped in the CD and diagonal directions.

In addition, paying attention to the stress at 10% elongation in the MD direction, the strength of the nonwoven fabric of Example 1 and Comparative Example 1 was determined to be between the values of Comparative Example 2 and Comparative Example 3. In Example 1 and Comparative Example 1, The strength of the nonwoven fabric of Example 1 is larger. That is, the nonwoven fabrics of Example 1 and Comparative Example 1 have the hole pattern of Comparative Example 2 and the igniter pattern of Comparative Example 3 at the same time and have the same functions, but the second entangled portion of Example 1 meanders The nonwoven fabric having a high tensile strength at 10% elongation in the MD direction as the nonwoven fabric has a superiority in terms of less wrinkling at the time of wiping and less drop off of the fibers.

The nonwoven fabrics of Examples 2 and 3 exhibited a satisfactory scratching noise as compared with the nonwoven fabrics of Comparative Examples 1 to 3 as in Example 1. The stress at 10% elongation in the MD direction was higher than that of the nonwoven fabric of Comparative Example 1 Big. The nonwoven fabric of Example 4 had a wrinkle resistance lower than that of the nonwoven fabric of Examples 1 to 3, but the stress at 10% elongation in the MD direction was larger than that of Comparative Example 1. Considering the cause of the deterioration of the nonwoven fabric of the nonwoven fabric of Example 4, in the nonwoven fabric of Example 4, since the width of the first interwoven portion which is an irregular pattern is larger than the width of the second interwoven portion which is a pore pattern, It seems to be caused by the lack of removability. Actually, in the nonwoven fabric of Examples 1 to 3, the value of the ratio of the width of the first intertwined portion to the width of the second intertwined portion (first interlinear portion / second interlinear portion) was 1, 4.

In addition, the nonwoven fabrics of Examples 5 to 9 exhibited a satisfactory scrubbing sound without being influenced by the wiping direction, and the wipes scraped by contamination remained. On the other hand, the nonwoven fabric of the comparative example 4 has a good stain removal property, but has a wiped mark due to a large amount of contamination in all directions of MD, CD, and diagonal lines. The nonwoven fabric of the comparative example 7 has good stain removal, MD, and diagonal directions, and the nonwoven fabrics of Comparative Examples 6, 8, and 9 had good stain removal, but there was a wiping mark due to a large amount of stain in the MD direction . The nonwoven fabric of Example 6 having the plain and pore patterns at the same time was superior to the nonwoven fabric of Comparative Example 4 having the front hole pattern and the nonwoven fabric of Comparative Example 7 having the plain and hole patterns formed in a straight line, . The nonwoven fabric of Example 6 had higher breaking strength in the MD direction and higher stress at 10% elongation than the nonwoven fabric of Comparative Example 4 and Comparative Example 7. As a result, wrinkles at the time of wiping were small, There is also an advantage in that there is little dropout. The nonwoven fabric of Example 7 having a meandering pattern and a meandering pattern at the same time had a wiping sound as compared with the nonwoven fabric of Comparative Example 5 which was a front saddle pattern and the nonwoven fabric of Comparative Example 8 which had a plain and a saddle pattern formed in a straight line. In addition, the nonwoven fabric of Example 7 is suitable for applications requiring greater elongation at break and higher elasticity than nonwoven fabrics of Comparative Examples 5 and 8. In addition, the nonwoven fabric of Example 7 has higher breaking strength than the nonwoven fabric of Comparative Example 8, and is excellent in handleability in the case where tensile force is applied to the nonwoven fabric, such as when wiping off. The nonwoven fabric of Example 9 has a higher stress at 10% elongation than that of the nonwoven fabric of Comparative Example 9, and therefore has superiority in that wrinkles at the time of wiping are small, and the drop of fibers is also small.

Industrial availability

The nonwoven fabric of the present invention is also useful for medical articles such as topsheet, second sheet and gauze, table cloth, face mask, filter, bandage, mat, cushioning material, backing material for carpets and wallpaper, It is suitable for wipers such as wipers, wet wipers and mop. The nonwoven fabric of the present invention is suitable for wetting wipes such as a wet wiper, a wet tissue, or a disposable diaper when the constituent fibers contain 10% by mass of the hydrophilic fiber. Further, in the case where the splittable conjugate fiber is composed of an incompatible two-component resin and contains at least 5% by mass of the splittable conjugate fiber in which at least one component is divided into two or more in cross section of the fiber, the non- , Precision wipers and other high-performance wipes.

1, 1a and 1b: water jet (water jet: WJ) 2: perforated member
2a: hole 3: nonwoven fabric
4: conveying support body 7: water flow nozzle
8a and 8b: width direction of the nonwoven fabric (CD direction) 10:
11, 14, 17, 20, 23, 26, 50, 60, 70, 80, 90, 100, 110, 120,
The first interlocking portion 12a, the second interlocking portion 12b, the third interlocking portion 12b, the second interlocking portion 12b, the third interlocking portion 12b, the third interlocking portion 13b,
The first and second interlaced portions 22a, 22b, 25, 41, 52a, 52b, 62a, 62b, 72a, 72b, 82a, 82b, 92a, 92b, 102a, 102b, 112,
113: The third interchange

Claims (9)

A nonwoven fabric comprising a fibrous aggregate,
Wherein the nonwoven fabric has a first interlocking portion and a second interminging portion,
Wherein the second engaging portion has a regular pattern formed by entangling constituent fibers of a predetermined portion of the nonwoven fabric in a water flow,
Wherein the first interlocking portion and the second interlocking portion are spaced from each other and exist in a plurality of rows,
Wherein at least one of the first and second interlaced portions maintains an interval of 2 mm or more in width and meanders along one direction of the nonwoven fabric. The method according to claim 1,
Wherein the first interchanging portion and the second interminging portion meander along one direction of the nonwoven fabric while maintaining an interval of 2 mm or more. The method according to claim 1 or 2,
Wherein the meandering of the second entangled portion is repeated regularly at a cycle of 5 to 200 mm. The method according to any one of claims 1 to 3,
Wherein the regular pattern is a hole pattern. The method according to any one of claims 1 to 4,
Wherein the first entangled portion is formed by water entanglement. A wiping material comprising the nonwoven fabric according to any one of claims 1 to 5. A part of the constituent fibers of the fibrous aggregate is entangled in water on a predetermined support having a regular pattern so that a part of the constituent fibers is rearranged to form a second proximal part having a regular pattern, A method for producing a nonwoven fabric in which a plurality of spaced first entangled portions exist in a plurality of rows,
At the time of water flow entanglement forming the second entangled part, the pressurized water is sprayed to the nonwoven fabric through the perforated member, and at least one of the first and second entangled parts is formed by meandering by vibrating the perforated member Wherein the nonwoven fabric has a thickness of 100 to 300 nm. The method of claim 7,
And the first engaging portion and the second engaging portion are formed by meandering. The method according to claim 7 or 8,
Wherein the direction in which the perforated member is vibrated is a direction in which the angle is in a range of more than 0 degrees and not more than 45 degrees from a width direction or a width direction of the nonwoven fabric.

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