JP4863820B2 - Fabric surface processing method - Google Patents

Description

  The present invention relates to a surface processing method for performing water repellent processing on one side of a thin fabric.

  Various physical treatments and chemical treatments have been applied to the surface treatment of the fabric, but the surface treatment of the fabric has both water absorption and water repellency in order to improve the water absorption and wicking properties against sweat. A method has been proposed.

  For example, in Patent Document 1, a water-repellent treatment layer is formed only on the entire surface of the convex portion on the back side of the fabric that directly touches the skin, and the remaining fabric back-side concave portion excluding the water-repellent treatment layer and the fabric surface continuous therewith. A surface processing method for applying water absorption treatment to the part is described. Further, in Patent Document 2, when the water-repellent treatment is performed on the surface layer on one side of the fabric, the water-repellent treatment is performed by leaving 3 to 30% of the surface area as a fine point and / or a linear non-water-repellent portion. A surface processing method is described in which the entire non-water-repellent portion of the back fabric is subjected to a hydrophilic treatment.

  Further, in Patent Document 3, a coating liquid that provides various functions such as water repellency, antibacterial properties, and hydrophilicity (hygroscopicity) is applied on the surface of a textile product by using a gravure coating surface treatment technique. Such a surface treatment makes it possible to produce a fiber product having a plurality of functions such that the outer surface has water repellency and the inner surface has antibacterial and hydrophilic properties.

  In Patent Document 4, a pile made of polyester fiber is disposed on at least one surface of a two-layer woven fabric, and a water-absorbing agent is applied to one surface having the pile, and the other surface is repellent. The point which gave the liquid medicine is described.

Further, in Patent Document 5, in order to prevent sweat bleeding that appears on the surface of a fabric when thin clothing such as a shirt is worn in summer, the constituent fibers of the fabric are subjected to water repellent treatment, and at least one of the fabrics A water-absorbing fabric is described in which the surface is subjected to raising treatment so that substantially no water-repellent treatment agent is attached to the cut surface of the raised fiber. As a method for preventing discoloration of such thin clothing due to sweat wetting, a method of applying a white pigment to the surface of the fiber fabric (see Patent Document 6), a multi-structure structure of water-absorbing fibers on the inside of the body side and water-repellent fibers on the outside (See Patent Document 7).
Japanese Patent Publication No. 1-53394 Japanese Patent Publication No. 4-28830 JP 2005-344273 A JP 2002-266249 A JP 2004-156174 A Japanese Patent Laid-Open No. 11-181673 JP 2004-131904 A

  As recognized in the above-mentioned prior literature, thin clothing is required to prevent discoloration of clothing due to sweat in summer, and in recent years, bleeding due to incontinence etc. has been accompanied by an increase in the number of elderly people. There is also a growing demand to prevent the appearance of discoloration on the outer surface of clothing. Furthermore, there is a demand for measures against discoloration associated with bleeding of clothes due to water drops when encountering showers outdoors.

  As a measure to prevent such discoloration due to moisture bleeding, the water repellent is treated on the outer surface of the fiber product to prevent bleeding to the outer surface, as has been done in the above-mentioned literature. A method has been proposed. In order to prevent discoloration, a water repellent agent is distributed over the entire outer surface, (1) blocking the exudation of moisture exuding from the inside to the outer surface, and (2) moisture from the outside of the fabric. Measures such as blocking by the water repellency of the outer surface are necessary. However, in the case of a thin fabric used for a thin textile product, it is difficult to apply a water repellent agent only on one side because the surface of the fabric is slipped through when treated with a liquid water repellent agent. Such see-through of the water repellent agent impairs water absorption, which is one of the comfort factors in clothing and the like, leading to discomfort during use.

Accordingly, the present invention is the moisture entire outer surface without thickness is the basis weight in 0.2mm~1.5mm to strike through the water repellent in the cloth of thin cloth of 100g / m ² ~1000g / m ² bleeding prevention It is an object of the present invention to provide a fabric surface treatment method that can provide a necessary amount of water and can ensure a water-absorbing function on the water-absorbing surface (inner surface).

Surface treatment method of a fabric according to the present invention, the basis weight at 0.55 Mm～1.5Mm thickness is a surface treatment method of fabric ^{100g / m 2 ~1000g / m 2} , at least one of the fabric Water-absorbing processing step of providing water-absorbing function on at least one side by applying a water-absorbing agent to the entire surface of one side and drying, and a rotary screen printing machine having 40 to 300 meshes per inch. water agent printing paste 0.5 wt% to 30 wt% unrealized viscosity of 8000mPa · s~25000mPa · s on the other one entire surface of the fabric with the coating glue of ^{10g / m 2 ~70g / m 2} 1 after stamped indicia by round of impress printing process, that drying and to have a function of water repellency to the other one side by causing a heat treatment and a water-repellent treatment step you prevent discoloration of the fabric due to the bleeding of water Characteristic To.
Surface processing method of another fabric according to the present invention, basis weight thickness in 0.2mm~1.5mm is a surface treatment method of fabric ^{100g / m 2 ~1000g / m 2} , the fabric of at least By using a water-absorbing processing step in which at least one surface has a water-absorbing function by applying a water-absorbing agent to one entire surface and drying, and a rotary screen printing machine having 40 to 300 meshes per inch. the printing paste viscosity include water repellent 0.5% to 30% by weight is 8000mPa · s~25000mPa · s throughout another one side of the fabric with the coating glue of ^{10g / m 2 ~70g / m 2} 2 A fabric that is subjected to a water-repellent function on the other side of the other side by performing a printing process divided into two times and printing the amount of the first coating less than the second time, followed by drying and heat treatment to cause water repellency. And a water repellent process for preventing discoloration.
Surface treatment method of still another fabric according to the present invention, basis weight thickness in 0.2mm~1.5mm is a surface treatment method of fabric ^{100g / m 2 ~1000g / m 2} , the fabric of A water-absorbing process for imparting a water-absorbing function to at least one side by applying a water-absorbing agent to at least one side and drying, and a rotary screen printing machine having 40 to 300 meshes per inch in the coating glue of 10g / m ² ~70g / m ² the printing paste viscosity include water repellent 0.5% to 30% by weight is 8000mPa · s~25000mPa · s throughout another one surface of the fabric by After performing the printing process in multiple times and printing the first water repellent with a different one from the second time onward, drying and heat treatment give the other side a water repellent function, And a water repellent process for preventing discoloration of the fabric due to bleeding.

  The present invention has the above-described configuration, whereby a printing paste containing a water repellent agent is printed only on the other side of the fabric by a rotary screen printing machine, and the fabric is processed regardless of before and after the processing step. By applying a water-absorbing agent to at least one side of the glass so that at least one side has a water-absorbing function, one side has a water-absorbing function and the other side has a water-repellent function. A thin fabric can be obtained.

  By performing a printing process using a rotary screen printing machine, it is possible to impart an amount necessary for preventing moisture bleeding to the entire outer surface without penetrating the printing paste containing the water repellent. Applying the required amount of water repellent in multiple times to the thinner fabric, giving the required amount while reliably preventing back-through. Is possible.

  Water repellent treatment can be applied to only one side of the other side of the water-repellent process without any breakthrough, so that water absorption can be ensured on one side of the thin fabric, even when used as clothing. It becomes possible to absorb sweat and suppress stickiness. In addition, the water repellent finish prevents moisture bleeding and prevents fabric discoloration due to bleeding, but it does not affect the divergence and breathability of moisture, so it is a thin shirt, T-shirt, and underwear. It is suitable for clothing that touches the skin directly like a kind. Further, in addition to sweat bleeding, it is possible to suppress discoloration of the outer surface of the thin fabric against water bleeding due to incontinence and water droplet bleeding such as showers.

  Examples of the fabric subjected to the surface treatment according to the present invention include recycled fibers represented by rayon, natural fibers represented by cotton, semi-synthetic fibers such as acetate, polyester-based synthetic fibers represented by polyethylene terephthalate, and nylons. Examples thereof include all fabrics that can be subjected to water absorption processing and water repellent processing, such as aliphatic polyamide-based synthetic fibers, or thin fabrics using mixed fibers thereof. And it can apply to any fabrics, such as a woven fabric, a knitted fabric, or a nonwoven fabric, and it does not specifically limit.

  The thickness of the fabric is preferably 0.2 mm to 1.5 mm, and when the thickness is less than 0.2 mm, the printing paste printed on one side in the water-repellent process is the other side. It becomes impossible to ensure sufficient water absorption. In a single printing process, the fabric thickness is preferably 0.55 mm to 1.5 mm, and when the fabric thickness is 0.2 mm to 1.5 mm, one or more printing processes are performed. Is preferred.

Also, the basis weight of the fabric is preferably applied to those of ^{100g / m 2 ~1000g / m 2} , the basis weight is less than 100 g / m ^2, the printing paste was stamped indicia on one surface with water-repellent treatment step It reaches the other side, and sufficient water absorption cannot be secured. In one impress printing process is suitable basis weight of the fabric is ^{130g / m 2 ~1000g / m 2} , when the basis weight of the fabric of 100g / m ² ~1000g / m ^2, the impress printing of more than one Processing is preferred.

  As the water-absorbing agent used in the water-absorbing processing step, any water-absorbing agent having affinity with the fibers used in the fabric can be used. In general, a hydrophilic film including a drug called a sweat absorbent and a hydrophilizing agent is attached to the fiber to form a hydrophilic film.

  For example, a hydrophilic agent such as an aromatic polyester-polyether block copolymer having a high affinity may be used for polyester fibers. The processing method for the water-absorbing agent is preferably a method for uniformly applying the entire surface or one surface of the fabric, such as a method of exhaustion, dipping, coating or spraying. The amount of the water-absorbing agent may be appropriately adjusted according to the type of the water-absorbing agent. For example, in the case of a water-absorbing agent (product surface SR-1000, manufactured by Takamatsu Yushi Co., Ltd.), the unit of the fabric It is preferable to apply about 0.5 wt% to 10 wt% with respect to the weight.

  The water-absorbing process is not particularly limited as long as at least one side of the fabric is processed regardless of before and after the water-repellent process. For example, the entire surface of the fabric is water-absorbing processed to give the entire surface water-absorbing function, and then the other one surface is water-repellent, so that one side has the water-absorbing function, and the other surface has the water-absorbing function. It can have a water repellent function. In addition, a water-absorbing function is applied to only one side of the fabric, a water-absorbing function is applied to one side, and a water-absorbing function is applied to the other side. The other surface can have a water repellency function. In addition, after one side of the fabric has a water-repellent treatment and the other side has a water-repellent function, one side of the fabric has a water-absorbing function, so that one side has a water-absorbing function. And the other surface can have a water-repellent function. Also, the water repellent treatment was applied to the other side of the fabric and the water repellent function was applied to the other side of the fabric, and then the entire surface of the fabric was subjected to a water absorption treatment, which was applied to the other surface subjected to the water repellent finish. The water-absorbing agent is not repelled and fixed, and the water-repellent function is maintained, so that one side can have a water-absorbing function and the other side can have a water-repellent function. .

  Examples of the water repellent used in the water repellent processing step include fluorine resins, silicon resins, paraffin resins, ethylene urea resins, fatty acid resins, and the like, and a resin in which a plurality of these resins are mixed may be used. To the printing paste, 0.5 to 30% by weight of a water repellent is added. The viscosity of the printing paste is preferably adjusted to 8000 mPa · s to 25000 mPa · s. When the viscosity is lower than 8000 mPa · s, the cloth surface penetrates into the inside when performing the printing process, and the water absorption side is affected, so that a sufficient water absorption effect cannot be obtained. When the viscosity exceeds 25000 mPa · s, it becomes impossible to print a sufficient coating amount from the mesh. The viscosity can be adjusted with a drug generally called a thickener.

  Moreover, in order to improve the durability of the applied water-repellent treatment layer, a crosslinking agent may be used. Examples of the crosslinking agent include melamine resin, epoxy resin, urethane resin, polyamide resin, polyester resin, and acrylic resin. The crosslinking agent is preferably used in an amount of 0.01% by weight to 10% by weight.

  Examples of the rotary screen printing machine for printing a printing paste containing a water repellent include, for example, an apparatus using a cylindrical screen plate, but other known rotary screen printing machines may be used, and particularly limited. Not. An apparatus using a cylindrical screen plate is set so that a squeegee is disposed inside a metal cylindrical screen plate and the tip of the squeegee is in pressure contact with the inner peripheral surface of the cylindrical screen plate. Printing paste is supplied between the inner peripheral surface of the cylindrical screen plate and the squeegee, and a backup roller is disposed on the outer peripheral surface of the cylindrical screen plate so that a fabric for water-repellent treatment is in pressure contact therewith. Then, by rotating the cylindrical screen plate, the printing paste is blocked by the squeegee and pushed out of the cylindrical screen plate, and the fabric conveyed by the backup roller that rotates in synchronization with the cylindrical screen plate. Printing paste is printed on one side.

  The number of meshes on the screen of the rotary screen printing machine is preferably set to 40 meshes to 300 meshes per inch. When the mesh number is smaller than 40, the distribution of the water repellent area on the fabric surface is distributed. When the number of meshes exceeds 300, the amount of coating paste is remarkably reduced and the water repellency is destabilized.

Further, the coating glue of the printing paste, it is preferable to impart 10g / m ² ~70g / m ² on one surface of the fabric. If the amount of paste is less than 10 g / m ² , a sufficient water repellent effect cannot be obtained, and discoloration due to moisture bleeding cannot be suppressed. On the other hand, if the amount of paste is more than 70 g / m ² , the fabric becomes hard and the flexibility is impaired, and the time required for drying the printing paste becomes longer. .

In the water repellent process, it is necessary to prevent the water repellent from penetrating to the opposite side of the fabric. However, the number of meshes, the viscosity of the printing paste, and the amount of paste can be reduced by printing with a rotary screen printing machine. The amount of water repellent applied and the distribution of the water repellent can be printed in an optimal state with fine adjustment. In the case of a thinner fabric, particularly a fabric having a thickness of less than 0.55 mm and a basis weight of less than 130 g / m ² , the entire surface of the fabric is repelled by performing one or more printing processes. Water treatment can be performed, and the effect of preventing discoloration due to moisture bleeding can be obtained.

  A water-soluble substance (such as PVA) that inhibits water absorption is applied by a single-sided treatment or immersion treatment before the water-repellent processing step, and the fabric is washed after the water-repellent processing step to give the water-soluble material. The substance may be removed. Thus, since water absorption is inhibited before water repellent processing, it can suppress that a water repellent penetrate | infiltrates into parts other than the single side | surface to which water repellent treatment is carried out.

  In the water-repellent processing step, it is desirable to heat-treat the fabric to which the water-repellent agent has been applied, at 100 ° C. to 200 ° C., more preferably 160 ° C. to 195 ° C. A stable water-repellent effect can be obtained by such heat treatment.

  You may make it give weak water repellency by providing a water repellent to the surface side provided with water absorption with respect to the fabric after a water repellent process. By giving such a weak water repellency, a sticky feeling when sweat is absorbed can be suppressed. For the application of such a water repellent, a gravure roll method, a kiss roll method, a foam processing method, a rotary screen printing method, a flat screen printing method, and a roller printing method are used to finely adjust the amount of the water repellent applied to repel the water. The aqueous property can be set to an optimum state.

  The present invention will be described in more detail with reference to the following examples, but the examples should not be construed as limiting the present invention.

[Example 1]
The following surface treatment was performed using a knitted fabric made of 90% polyester fiber and 10% polyurethane fiber having a thickness of 0.75 mm and a basis weight of 302 g / m ² .
<Water absorption process>
As the water absorbing agent, a water absorbing agent (product name SR-1000) manufactured by Takamatsu Yushi Co., Ltd. was used. The water-absorbing agent was used in an amount of 5% by weight per unit weight of the fabric, and the bath was treated at 125 ° C. for 30 minutes and then dried at 180 ° C. for 1 minute.
<Water repellent process>
Printing paste was printed using the rotary screen printing machine using the cylindrical screen plate described above. The mesh number of the screen plate was 80 mesh / inch, and the amount of printing paste was set to 38 g / m ² .
The printing paste was prepared by mixing the following substances and had a viscosity of 14000 mPa · s.
93% by weight of water
Fluorine-based water repellent (Nikka Chemical Co., Ltd.) 6% by weight
Urethane-based cross-linking agent (manufactured by Nikka Chemical Co., Ltd.) 1% by weight
After the printing process, the fabric was sufficiently dried at 155 ° C. Thereafter, the dried fabric was heat treated at 180 ° C. for 1 minute.

[Example 2]
The following surface processing was performed using a circular knitted fabric made of 65% polyester fiber and 35% cotton fiber having a thickness of 0.7 mm and a basis weight of 157 g / m ² .
<Water absorption process>
As the water absorbing agent, a water absorbing agent (product name SR-1000) manufactured by Takamatsu Yushi Co., Ltd. was used. The water-absorbing agent was used at 5% by weight per unit weight of the fabric, and the bath was treated at 100 ° C. for 30 minutes and then dried at 180 ° C. for 1 minute.
<Water repellent process>
Printing paste was printed using the rotary screen printing machine using the cylindrical screen plate described above. The mesh number of the screen plate was 80 mesh / inch, and the amount of printing paste was set to 38 g / m ² . The same printing paste as in Example 1 was prepared and used. After the printing process, the fabric was sufficiently dried at 155 ° C., and the dried fabric was heat-treated at 180 ° C. for 1 minute.

[Example 3]
The following surface processing was performed using a knitted fabric made of 80% polyester fiber and 20% polyurethane fiber having a thickness of 0.52 mm and a basis weight of 231 g / m ² .
<Water absorption process>
As the water absorbing agent, a water absorbing agent (product name SR-1000) manufactured by Takamatsu Yushi Co., Ltd. was used. The water-absorbing agent was used in an amount of 5% by weight per unit weight of the fabric, and the bath was treated at 120 ° C. for 30 minutes and then dried at 180 ° C. for 1 minute.
<Water repellent process>
The printing process was performed twice using the rotary screen printing machine using the cylindrical screen plate described above.
(1) The mesh number of the first printing screen plate was 60 mesh / inch, and the amount of printing paste was set to 18 g / m ² .
The printing paste was prepared by mixing the following substances and had a viscosity of 18000 mPa · s.
98% by weight of water
Silicone water repellent (manufactured by Kyoeisha Chemical Co., Ltd.) 2% by weight
After the printing process, the fabric was sufficiently dried at 155 ° C.
(2) The mesh number of the second printing screen plate was set to 80 mesh / inch, and the amount of printing paste was set to 38 g / m ² .
The printing paste was prepared by mixing the following substances and had a viscosity of 14000 mPa · s.
93% by weight of water
Fluorine-based water repellent (Nikka Chemical Co., Ltd.) 6% by weight
Urethane-based cross-linking agent (manufactured by Nikka Chemical Co., Ltd.) 1% by weight
After the printing process, the fabric was sufficiently dried at 155 ° C. Thereafter, the dried fabric was heat treated at 180 ° C. for 1 minute.

[Example 4]
The following surface processing was performed using a fabric made of 65% polyester fiber and 35% cotton fiber having a thickness of 0.25 mm and a basis weight of 114 g / m ² .
<Water absorption process>
As the water absorbing agent, a water absorbing agent (product name SR-1000) manufactured by Takamatsu Yushi Co., Ltd. was used. The water-absorbing agent was used at 5% by weight per unit weight of the fabric, and the bath was treated at 130 ° C. for 30 minutes and then dried at 180 ° C. for 1 minute.
<Water repellent process>
The printing process was performed twice using the rotary screen printing machine using the cylindrical screen plate described above.
(1) The mesh number of the first printing screen plate was 250 mesh / inch, and the amount of printing paste was set to 16 g / m ² .
The printing paste was prepared by mixing the following substances and had a viscosity of 18000 mPa · s.
98% by weight of water
Silicone water repellent (manufactured by Kyoeisha Chemical Co., Ltd.) 2% by weight
After the printing process, the fabric was sufficiently dried at 155 ° C.
(2) Second printing process After the same process as the second printing process in Example 3, the fabric was sufficiently dried at 155 ° C. Thereafter, the dried fabric was heat treated at 180 ° C. for 1 minute.

[Comparative Example 1]
After performing the same water-absorbing process as in Example 4 using the same fabric as in Example 4, in the water-repellent process, the second printing process is performed without performing the first printing process in Example 4. Only went. After the printing process, the fabric was sufficiently dried at 155 ° C. Thereafter, the dried fabric was heat treated at 180 ° C. for 1 minute.

[Comparative Example 2]
For comparison, the fabric used in Example 4 was subjected to an evaluation test without performing surface processing.

(Evaluation test)
The water absorption evaluation test was performed by a dropping method based on JIS L-1907. The water repellency evaluation test was conducted by a spray test in accordance with JIS L-1092. The discoloration of the fabric due to moisture bleeding was evaluated by visual observation of the degree of discoloration seen from the surface having water repellency on the opposite side by dropping water drops on the surface having water absorption. The evaluation results are shown in Table 1.

  According to this evaluation result, discoloration of the fabric due to moisture bleeding can be prevented by providing water repellency on one side of a thin fabric, and sufficient water absorption can be ensured on the opposite side. It is possible.

  In addition, as shown in Examples 3 and 4, a thinner fabric is subjected to a printing process twice so that only one side is water-repellent and the water absorption on the opposite side is not impaired. can do. On the other hand, in Comparative Example 1, although water repellency on one side is provided by a single printing process, the water absorption on the opposite side is greatly reduced, and a water repellent is provided on the opposite side. It is said that it has penetrated. As described above, by performing the printing process in a plurality of times, it is possible to suppress the water repellent from penetrating into the opposite surface and perform a sufficient water repellent treatment without impairing the water absorption.

Claims (3)

Thickness is the basis weight in 0.55 Mm～1.5Mm a surface treatment method of fabric ^{100g / m 2 ~1000g / m 2} , and dried by applying a water-absorbing agent to the total of at least one of the one surface of the fabric The water-repellent processing step of providing water-absorbing function on at least one of the surfaces, and the rotary screen printing machine having 40 to 300 meshes per inch, the water repellent is 0.5 to 30% by weight. after unrealized viscosity stamped mark by one impress printing process with a coating paste of 8000mPa · s~25000mPa · s at a printing paste 10 g / m ² on the other one entire surface of the fabric a ~70g / m ^2, dried surface treatment method of a fabric, characterized in that and have the function of water repellency to the other one side by causing a heat treatment and a water-repellent treatment step you prevent discoloration of the fabric due to the bleeding of water. Thickness is 0.2mm ~ 1.5mm and basis weight is 100g / m ² ~ 1000g / m ² And a water-absorbing processing step for imparting a water-absorbing function to at least one side by applying a water-absorbing agent to at least one side of the fabric and drying the fabric. 10 g of printing paste having a water repellent content of 0.5 wt% to 30 wt% and a viscosity of 8000 mPa · s to 25000 mPa · s on the other side of the fabric using a rotary screen printing machine having a mesh number of 40 to 300 mesh / M ² ~ 70g / m ² After the printing process is divided into several times with the amount of paste, the first amount of paste is printed less than after the second time, and then dried and heat-treated to give the other side a water-repellent function. And a water repellent treatment step for preventing discoloration of the fabric due to moisture bleeding. Thickness is 0.2mm ~ 1.5mm and basis weight is 100g / m ² ~ 1000g / m ² And a water-absorbing processing step for imparting a water-absorbing function to at least one side by applying a water-absorbing agent to at least one side of the fabric and drying the fabric. 10 g of printing paste having a water repellent content of 0.5 wt% to 30 wt% and a viscosity of 8000 mPa · s to 25000 mPa · s on the other side of the fabric using a rotary screen printing machine having a mesh number of 40 to 300 mesh / M ² ~ 70g / m ² After the first water-repellent agent is printed differently from the second and subsequent ones, the other side has water-repellent function by drying and heat treatment. And a water repellent processing step for preventing discoloration of the fabric due to moisture bleeding.