WO2022224666A1

WO2022224666A1 - Fiber structure

Info

Publication number: WO2022224666A1
Application number: PCT/JP2022/012993
Authority: WO
Inventors: 鈴木雄太郎; 鳥谷部慧悟
Original assignee: 東レ株式会社
Priority date: 2021-04-21
Filing date: 2022-03-22
Publication date: 2022-10-27
Also published as: JPWO2022224666A1

Abstract

This fiber structure has a joint part at which one end of a first cloth and one end of a second cloth are joined; and a tape-shaped member covering the joint part and adhering thereto. The tape-shaped member includes at least a base cloth and a hot-melt resin layer. The hot-melt resin layer is disposed on the adhesion surface side adhering to the joint part. At least a part of the first cloth, second cloth, and tape-shaped member base cloth forming the joint part is fabric formed of synthetic fibers including single fiber filaments having, on the surfaces thereof, a plurality of grooves continuing in the fiber length direction.　Provided is a fiber structure that can prevent the joint part from opening even when a large load is applied to the joint part and can reduce the possibility of peeling of the tape-shaped member and the possibility of occurrence of a slip phenomenon.

Description

fiber structure

The present invention relates to a fiber structure in sportswear such as swimwear, bicycle wear, speed skating wear, ski wear, mountaineering wear, and textile products such as tents.

Various types of sportswear, such as racing swimwear and fitness swimwear, use highly stretchable fabrics. When stretching fabrics are joined together, an ultrasonic welding method is usually used. However, if the stretch fabrics are simply welded together, the strength is low and the joints may open. In order to cope with this, a tape-like member having relatively high stretchability in the direction along the joint and relatively low stretchability in the direction perpendicular to the joint is adhered to the joint.

In skiwear, mountaineering wear, tents, etc., as described in Patent Document 2, waterproof materials obtained by coating or laminating a film such as polyurethane on fiber woven or knitted fabrics are used, and the sewn parts of these waterproof materials are joined. A tape-shaped member is used to improve the strength of the part and to prevent water from seeping through the seams.

Patent No. 5566953 Japanese Patent Laid-Open No. 11-279903

Patent Document 1 discloses a technique of stacking and pasting two types of sheets with different elasticity in order to increase the adhesive strength of the joint. However, with this method, the number of steps for attaching the sheet is doubled, resulting in a significant drop in productivity. In addition, Patent Document 2 describes a filler having high washing durability by laminating a polyurethane resin through an adhesive layer on a warp knitted fabric with nylon 66 fibers having a fineness of 15 to 30 denier and 40 to 60 courses/inch. A tape is disclosed. However, this method limits the material of the sealing tape, and cannot provide sealing tapes having high adhesive strength to various compositions and tissues.

To provide a fiber structure capable of preventing opening of the joints even when a large load is applied to the joints, and reducing the possibility of peeling of a tape-shaped member and occurrence of a slip phenomenon. is the subject. By using this in clothing applications, the durability of joints between fabrics can be improved, and it can be extremely practically used in applications where strong loads are likely to be applied, such as swimming suits and mountaineering wear. .

The fiber structure of the present invention has the following configuration in order to solve the above problems. i.e.
A fiber structure having a joint portion where one end portion of a first fabric and one end portion of a second fabric are joined, and a tape-shaped member adhered to cover the joint portion, wherein the tape-shaped member is at least A first fabric, a second fabric, and the tape-shaped fabric comprising a base fabric and a hot-melt resin layer, the hot-melt resin layer being disposed on the side of the bonding surface with the joint, and constituting the joint. A fiber structure in which at least a part of a member base fabric is a fabric composed of synthetic fibers composed of monofilament filaments having a plurality of grooves continuous in the fiber length direction on the surface.

In the fiber structure of the present invention, the single fiber filament preferably has 2 to 32 grooves.

In the fiber structure of the present invention, the single fiber filament has a groove depth of 1.0 μm to 10.0 μm, a groove entrance width of 0.5 μm to 10.0 μm, and a protrusion tip width of 10.0 μm. The following are preferable.

In the fiber structure of the present invention, the cross-sectional shape of the single fiber preferably satisfies the following (formula 1) and (formula 2).
W ₂ /W ₁ ≧1.3 (Formula 1)
0.15≦H/D≦0.25 (Formula 2)
W ₁ : width of groove entrance (μm)
W ₂ : Width of groove wide portion (μm)
H: Groove depth (μm)
D: fiber diameter (μm)

According to the present invention, a synthetic fiber composed of a single filament having a plurality of grooves (hereinafter sometimes referred to as "slits") continuous in the fiber length direction on the surface of at least a part of the constituent fibers of the fiber structure. , the hot-melt resin used for adhesion enters the slit and the adhesion area increases, preventing the joint from opening even when a large load is applied to the joint, and tape-like It is possible to reduce the possibility that the member will peel off and the slip phenomenon will occur. By using this for clothing, it is possible to improve the durability of joints between fabrics. It can be used very practically especially in applications where a strong load is likely to be applied, for example, in applications such as swimming suits and mountaineering wear.

1 is a schematic diagram of an example of a core-sheath composite fiber used in the present invention; FIG. 1 is an enlarged schematic diagram of a groove portion of an example of a core-sheath composite fiber used in the present invention; FIG. Fig. 2 is an enlarged schematic diagram of projections of an example of the core-sheath composite fiber used in the present invention. It is the schematic which shows an example of the bonded fabric preparation procedure by ultrasonic bonding. It is a schematic diagram showing a laminated structure of a tape-shaped member. It is a schematic diagram showing the shape of a peel strength measurement sample. It is a schematic image diagram of a graph obtained from peel strength measurement results. FIG. 11 is a partially enlarged view of one embodiment of distribution hole arrangement in the final distribution plate;

The present invention will be described in detail below.

The fiber structure of the present invention is a fiber structure having a joint portion in which one end portion of a first fabric and one end portion of a second fabric are joined together, and a tape-shaped member that covers and adheres to the joint portion. The tape-like member is composed of at least a base cloth and a hot-melt resin layer, and the hot-melt resin layer is arranged on the bonding surface side with the joint portion. Further, at least a part of the first fabric, the second fabric, and the base fabric of the tape-shaped member constituting the joint portion is a synthetic fiber made of a single filament having a plurality of grooves continuous in the fiber length direction on the surface. (hereinafter sometimes referred to as "slit fiber"), the hot-melt resin used for bonding the tape-shaped member and the joint part enters the grooves of the single fiber filament, and the bonding area is widened. exhibits excellent adhesive strength. If the slit fibers are included in any one of the first fabric, the second fabric, and the base fabric of the tape-shaped member, the adhesive strength is expected to be improved, and both the first fabric and the second fabric It is more preferable that the slit fiber is contained in the tape-shaped member base fabric in addition to the first fabric and the second fabric.

In addition, in the present invention, the first fabric and the second fabric may be the same material or different materials.

It is preferable that the slit fiber surface has a plurality of grooves, and if there is only one groove, the groove may not exist on the bonding surface depending on the direction of the fiber, and the effect of improving the bonding strength can be obtained. Can not. The number of grooves is preferably 2-32, more preferably 4-16. When the number of grooves is within the above preferred range, the width of the projections in the cross-sectional shape of the fiber does not become too small, and fibrils and fluff do not occur on the surface of the fiber during processing or use of the product.

In the present invention, in order to obtain the special cross section of the slit fiber, it is desirable to use the core-sheath composite fiber as the raw material fiber. Here, the core-sheath composite fiber is composed of two types of polymers, and refers to a fiber having a special cross-sectional shape in which a plurality of grooves having wide width portions are present in the cross-section of the core component. FIG. 1 is a schematic diagram showing an example of a cross-sectional shape of a monofilament that constitutes the synthetic fiber multifilament used in the present invention, and has eight grooves having the wide width portions. This cross section has projections 11 and voids 12 made of polymer. Also, the fiber diameter 13(D) is defined as the diameter of the circle that circumscribes the tip of the projection at two or more points in the cross section.

When the core-sheath composite fiber is used in a woven or knitted fabric, the void is basically formed by subjecting the fiber to an elution operation. Therefore, in the core-sheath composite fiber, the area ratio of the core component in the cross section of the fiber is preferably 50% to 90%. Also, from the viewpoint of shortening the elution treatment time, it is preferable to lower the area ratio of the sheath component. to 90% is particularly preferred.

In the core-sheath composite fiber, the area ratio of the core component may exceed 90%, but the upper limit of the ratio is set at 90% as the range in which the sheath component can substantially stably form the grooves. %. The slit fiber may be produced by melt-spinning a one-component polymer using a die for irregular cross section. The shape of the slit fibers is described in detail below.

Moreover, the depth (H) of the groove in the cross-sectional shape of the single filament is preferably 1.0 μm to 10.0 μm. When the depth of the groove is within the above preferred range, the effect of improving the adhesive strength due to the permeation of the hot-melt resin into the slit is likely to be exhibited, and there is no possibility that the strength of the fiber is lowered. In addition, the depth (H) of the groove in the slit fiber is synthesized from the straight line 21 (the distance of this straight line 21 is defined as the width (W ₁ ) of the groove entrance) connecting the ends of the protrusions existing on both sides of the groove in FIG. A vertical line 22 is connected to the center point of the cross section in the direction perpendicular to the longitudinal direction of the fiber filament, and the gap from the intersection of the straight line 21 connecting the ends of the projections on the line of the vertical line 22 and the vertical line 22 to the fiber polymer portion 23 Defined as depth. The center point is defined as the center point of the circle 13 that most circumscribes the tip of the protrusion in the cross section of the fiber polymer, and the radius of the circumscribed circle 13 is defined as the fiber diameter (D).

The width (W ₁ ) of the groove entrance is preferably 0.5 μm to 10.0 μm. When the width of the groove entrance is within the above preferable range, the effect of improving the adhesive strength due to the permeation of the hot-melt resin into the inside of the slit is likely to occur, and the strength of the fiber is reduced, and there is a risk of fibrillation due to friction during use. do not have. The width of the groove entrance is defined as the length of the straight line 21 connecting the ends of the adjacent protrusions in the fiber cross section perpendicular to the longitudinal direction of the single fiber filament.

In the slit fiber used in the present invention, preferred ranges for the groove entrance width (W ₁ ), the width of the wide groove portion (W ₂ ), and the groove depth (H) with respect to the fiber diameter (D) will be described below. The width (W ₂ ) of the groove wide portion is the maximum point 24 when the length orthogonal to the center line of the groove portion is measured from the outer periphery toward the center of the fiber along the center line. By setting the ratio W ₂ /W ₁ of the width (W ₂ ) of the wide portion of the groove to the width (W ₁ ) of the groove entrance to 1.3 or more, the hot-melt resin that has entered the inside of the groove is cured and then peeled off. This is preferable because it is possible to prevent it and obtain the effect of improving the adhesive strength. W ₂ /W ₁ is more preferably 1.5 or more, still more preferably 1.8 or more. Moreover, it is particularly preferable that W ₂ /W ₁ is 3.0 or less in order to suppress cracking of the protrusion and maintain the shape of the entrance of the groove. By maintaining the shape of the entrance of the groove, the effect of improving the adhesive strength can be maintained.

Also, the ratio (H/D) of the fiber diameter (D) to the groove depth (H) is preferably 0.15 or more and 0.25 or less. As a result, a sufficient amount of hot-melt resin enters the inside of the groove, and the effect of improving the adhesive strength can be exhibited. No fear. H/D is more preferably 0.17 or more and less than 0.22.

As the single fiber filament having grooves on the surface used in the present invention, the width 31 of the tip of the projection (P _out ), the width of the groove entrance (W ₁ ), and the width of the tip of the projection (P _out ) 31 are adjacent to each other. A monofilament having a bottom width (P _min ) 32 of the matching groove that satisfies the following formula can be more preferably used. The width (P _out ) 31 of the tip of the protrusion is the shortest distance connecting one tip and the other tip of the protrusion, which is represented by 31 in FIG. The width 32 (P _min ) of the bottom surface of the projection is, in other words, the distance that connects the points of contact of the inscribed circles of adjacent grooves with the projection interposed therebetween, and is the distance indicated by 32 in FIG. .

P _out /W ₁ =2 to 10
P _out /P _min ≧1.3
A single fiber filament having these grooves on the surface can be easily obtained by eluting the sheath component of the fiber produced by core-sheath composite spinning as described above using a solvent. As the core component, polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, polyamide, or the like can be used. From the viewpoint of simplifying the elution process, the sheath component is preferably copolyester, polylactic acid, polyvinyl alcohol, etc., which are readily soluble in aqueous solvents or hot water, and particularly polyethylene glycol and sodium sulfoisophthalic acid. It is preferable to use a polyester or polylactic acid which is copolymerized singly or in combination from the viewpoint of handleability and easy dissolution in an aqueous solvent.

In particular, when false twisting is applied, the core-sheath composite yarn containing eluted components is subjected to false twisting, and the eluted components are eluted in the dyeing process after weaving, so that the grooves are not crushed during false twisting. Furthermore, the shape of the grooves can be maintained even after false twisting. A slit yarn can also be obtained by normal spinning without using a conjugate spinning machine, and in this case, it is preferable to take care not to crush the grooves during the false twisting process. Core-sheath composite yarn, in which the grooves are filled with eluted components even during false twisting, prevents the grooves from being crushed, and the shape of the grooves is maintained by eluting the eluted components in the dyeing process after weaving and knitting. Therefore, it is preferable.

The preferred leaching and dyeing finishing method is to scouring the gray fabric, relaxing and drying it, then heat-setting the width with an intermediate set, and then leaching the groove component. Then, after dyeing, it is reduced and washed if it is made of polyester, and if it is made of nylon, it is fixed, washed with warm water, and dried. The next step is to perform water-repellent treatment and, if necessary, perform various functional processing, and finish setting.

The slit fiber can be used alone, but it can also be mixed with other materials. Mixed materials include natural fibers such as cotton and wool, synthetic filaments such as polyester filaments, polyamide filaments, polypropylene filaments and polyethylene filaments, polyurethane spandex and polyether-ester elastic fibers, polybutylene terephthalate fibers and polytriphthalate fibers. Elastic fibers such as methylene terephthalate fibers can be used. Moreover, you may use the covering coating thread|yarn which used these elastic fibers as a core thread. Among elastic fibers, a covering yarn having a polyurethane spandex as a core yarn and a synthetic fiber filament as a sheath yarn has excellent elongation rate and elongation recovery rate, and is preferable when used as a swimsuit, especially a swimming suit.

The slit fibers used in the present invention can be woven and knitted by ordinary methods, and can be dyed by ordinary methods.

In addition, when the woven or knitted fabric is a woven fabric, the weave structure is not particularly limited. Examples include double weave, multiple weave, warp pile weave, weft pile weave, and leno weave. In addition, when the woven or knitted fabric is a knitted fabric, the knitting structure is not particularly limited. Examples include smooth knitting (both sides knitting), rubber knitting, pearl knitting, Denby weaving, cord weaving, atlas weaving, chain weaving, and insertion weaving. Any texture can be used for both woven and knitted fabrics, but the droplet contact angle and water repellency tend to be larger when using a texture such as twill weave rather than plain weave, which is different from other cross-section fibers. When mixed, it is preferable to use a structure in which many slit fibers appear on the surface.

After the core-sheath composite yarn is eluted to form the slit fiber, when it is used as a woven or knitted fabric, water-repellent finishing is applied for swimming suit or mountaineering wear. , antistatic, antibacterial, soft finishing, and other known post-processing can be used in combination. Moreover, the water-repellent finishing process is not particularly limited, and may be a padding method, a spray method, a coating method, or the like.

Adhesion strength of joints by using a woven or knitted fabric containing slit fibers woven and knitted in the above process for at least a part of the first fabric, the second fabric, and the base fabric of the tape-shaped member constituting the joints An improvement effect can be obtained.

Also, the method of joining the first fabric and the second fabric is not particularly limited, and sewing, adhesion, fusion, etc. can be considered. Bonding by ultrasonic fusion is particularly preferable for use in swimwear, which requires a reduction in running water resistance by reducing unevenness.

A general method of joining by ultrasonic fusion will be explained with reference to FIG. As shown in FIG. 4(a), first, the first fabric 40a and the second fabric 40b are spaced apart between a pair of ultrasonic connector 41. As shown in FIG. Next, as shown in FIG. 4(b), each of the pair of ultrasonic bonding tools 41 is brought close to the first fabric 40a and the second fabric 40b, respectively, and ultrasonically welded to separate the upper and lower fabrics. By spreading them respectively, a fabric is obtained in which the first fabric and the second fabric are joined at the joining portion 44 as shown in FIG. 4(c). Subsequently, as shown in FIG. 4(D), a tape-shaped member 43 is arranged so as to cover one surface of the joint 44 of the joined fabrics, and then the joint 44 and the tape-shaped member are welded together by a pair of welding tools 42 . The member 43 is heat-sealed. As a result, as shown in FIG. 4E, a fiber structure 400 having a layered structure of the joints 44 and the tape-like members 43 is completed.

Next, an example of the structure of the tape-shaped member 43 will be described with reference to FIG. In the example of FIG. 5, the tape-shaped member 43 has a four-layer structure, and is composed of four layers, which are laminated in order of a base fabric 51, an adhesive layer 52, a film layer 53, and a hot-melt resin layer .

The adhesive layer 52 used for bonding the tape-like member base fabric 51 and the film layer 53 can use solvent-based resin adhesive lamination or the like in addition to the hot-melt resin. In addition, lamination by coating without the adhesive layer 52 is also possible. However, since the tape-shaped member 43 is required to be elongated for applications such as swimsuits for swimming races, it is preferable that the adhesive layer 52 be made of a hot-melt resin, a solvent-based resin adhesive laminate, or the like.

The material of the film layer 53 is not particularly limited, but it is preferable to use a polyurethane film with excellent elasticity because it improves the ability to follow movement when worn. The surface on which the tape-shaped member 43 is arranged does not matter on the front or back of the fabric, but in the case of swimwear, it is arranged on the back side of the fabric in order to prevent an increase in running water resistance due to surface irregularities, and in the case of mountaineering wear, to prevent wear due to abrasion. preferable. If the tape-like member 43 does not need to have a waterproof function, it may be constructed of two layers, the tape-like member base fabric 51 and the hot-melt resin layer 54 excluding the adhesive layer 52 and the film layer 53 .

The fabrics included in the fiber structure 400 include the first fabric 40a, the second fabric 40b, and the base fabric 51 used for the tape-shaped member. By using the slit fibers in at least a part of them, the effect of improving the adhesive strength at the time of bonding can be obtained. It is more preferable because it can

EXAMPLES The fiber structure of the present invention will be specifically described below with reference to Examples, but the present invention is not limited to these Examples. Each evaluation in the examples was determined by the following method.
(1) Fineness Synthetic fibers made of single filaments having a plurality of grooves continuous in the fiber length direction on the surface used in the water-repellent woven or knitted fabric of the present invention are unit lengths in an atmosphere of a temperature of 20 ° C. and a humidity of 65% RH. The weight per hit is measured, and the weight corresponding to 10,000m is calculated from that value. This measurement was repeated 10 times, and the value obtained by rounding off the decimal point of the simple average value was used as the fineness.
(2) Cross-sectional parameters of monofilament filaments having a plurality of grooves continuous in the fiber length direction on the surface A weight reduction treatment was carried out at a bath ratio of 1:30 for 1 minute to obtain a woven or knitted fabric containing special cross-section fibers in which only the sheath portion was eluted. A part of the woven or knitted fabric is cut perpendicular to the fiber axis direction so that the cross-sectional shape of the special cross-section fiber can be observed, and the special cross-section fiber is extracted with a scanning electron microscope (SEM) manufactured by Hitachi High-Technologies Corporation. Then, the groove inlet width (W ₁ ), groove wide width (W ₂ ), groove depth (H), and fiber diameter (D) were measured using image processing software (ImageJ). Furthermore, the width of the tip of the projection (P _out ) and the width of the bottom of the projection (P _min ) were also measured in the same manner as for the projection of the special cross-section fiber. The same operation was performed for five special cross-section fibers, and the average value was used as each value. Note that these values were obtained in units of μm to the second decimal place and rounded off to the second decimal place.
(3) Abrasion resistance of fiber structure (frosting test under wet conditions) evaluation For the abrasion method, use an appearance/retention type tester described in JIS L 1076 “Pilling test method for woven and knitted fabrics”, and use the upper holder bottom. The area was set to about 13 square cm, the number of frictions was set to 90 rpm, and the pressing load was set to 7.36 N. A water-repellent treated fiber structure sample was fixed on the upper holder and the lower friction plate, and attached to the upper holder. The fibrous structure samples were wetted with distilled water and then abraded for 10 minutes. After abrasion, the degree of discoloration and fading of the fiber structure sample attached to the upper holder was graded in 5 stages using a gray scale for discoloration and fading.
(4) Weaving density or knitting density The first fabric, the second fabric, and the base fabric used for the tape-shaped member before making the fiber structure were measured using a lunometer fabric density measuring device manufactured by Sodeyama Co., Ltd. Directional and weft densities were measured. The same measurement was performed at five different points, and the value obtained by rounding off the decimal point of the simple average value was taken as the weaving density or the knitting density.
(5) Peel Strength Using a test piece of 2.5 cm×about 15 cm shown in FIG. 6, the peel strength of the adhered tape-shaped member was measured according to the following procedure.

A line 61 is drawn parallel to the short side at a distance of 5 cm, and a line B 62 is drawn at a distance of 5 cm. Next, the tape-like member 43 adhered to the joint 44 of the first and second fabrics is peeled off by hand in the longitudinal direction of the test piece up to the A line. Furthermore, the clamping interval of the constant speed elongation type tensile tester Autograph AG-IS (manufactured by Shimadzu Corporation) with a self-recording device was set to 5 cm, and the bonded fabric 40 was tape-shaped with one clamp at the peeled portion with the other clamp. The member 43 is fixed. Also, at this time, the A line 61 is positioned substantially at the center of the gripping interval. Peel to line B 62 at a tensile speed of 10 cm/min to draw a curve of peel distance and peel strength. This curve is, for example, a curve with a plurality of vertices as shown in FIG. It can be obtained in units of cm.
[Example 1]
Polyethylene terephthalate (copolymerized PET1), which is obtained by copolymerizing 8.0 mol% of 5-sodium sulfoisophthalic acid and 10 wt% of polyethylene glycol having a molecular weight of 1,000, with nylon 6 (N6) as the core, is arranged in the sheath. After separately melting the core and sheath at 270°C using a spinneret designed for 36 filaments) were obtained. In the distribution plate directly above the discharge plate, the portion located at the interface between the core component and the sheath component was arranged in the pattern shown in FIG. By arranging the sheath component distribution holes 82 between the core component distribution holes 81, the sheath component is placed so as to be sandwiched between the core components discharged from the core component distribution holes, and a special groove shape is controlled. A core-sheath composite polymer flow was formed. The discharge plate used had a discharge introduction hole length of 5 mm, a reduced hole angle of 60°, a discharge hole diameter of 0.3 mm, and a discharge hole length/discharge hole diameter of 1.5. The core-sheath composite ratio was adjusted to 80:20 by weight. The resulting undrawn yarn was further subjected to false twisting to obtain a false twisted yarn of 56 Dtex/36 filaments.

Plain woven fabrics were woven using this false twisted yarn in common for the warp and the weft. The warp density was 177/2.54 cm and the weft density was 105/2.54 cm. The resulting fabric was scoured with sodium carbonate and surfactant and then set at 180° C. with a pin tenter. Next, weight reduction treatment was carried out in an aqueous sodium hydroxide solution having a concentration of 10 g/L at 100° C. for 60 minutes at a bath ratio of 1:30, and only the sheath portion was eluted to obtain special cross-section fibers. Subsequently, dyeing was performed by the following method. Acid dye (manufactured by Arkroma Japan Co., Ltd., trade name "Lanasyn Black M-DL p170") was adjusted to 5% Owf and treated at a bath ratio of 1:30 for 30 minutes at 100°C. Then, using an aqueous surfactant solution with a concentration of 1 g/L, soaping treatment was performed under the conditions of 60° C. for 10 minutes. Next, nylon fix 501 (manufactured by Senka Co., Ltd.) was used at 3% owf, and fix treatment was performed under reaction conditions of 80° C. for 20 minutes and a bath ratio of 1:30. The warp density after processing was 183/2.54 cm, and the weft density was 102/2.54 cm. Furthermore, using an ultrasonic sewing machine (LWU-3015-4 manufactured by Quinlight Denshi Seiko Co., Ltd.), one end of the first fabric and the second fabric are used so that the joint surface is perpendicular to the warp direction of the fabric. It was a fabric in which one end of the was joined. A tape-shaped member was prepared by laminating a 10 μm-thick low-viscosity type (approximately 3.0×10 ⁴ poise/105° C.) polyurethane hot-melt resin on the base fabric of the tape-shaped member made of the plain weave fabric. The joint portion of the joined fabrics is covered with a tape-shaped member so as to be in contact with the hot-melt resin layer, and a transfer press machine HP-4536A-12 (manufactured by Hashima Co., Ltd.) is used to press at 140 ° C. × 2.0 kg / cm. Bonding was performed under the conditions of ² ×10 seconds to obtain a fiber structure. When this fiber structure was evaluated for abrasion resistance by the frosting test under the wet conditions, the discoloration and fading was grade 4, no fibrils were generated, and the abrasion resistance was excellent. Furthermore, using this fibrous structure, the peel strength in each of the longitudinal and longitudinal directions was measured. The test was performed with N=3 and the average values are shown in Table 1. Although the abrasion resistance was slightly inferior to that of the round cross section, the peeling strength was excellent and the adhesiveness to the fabric was excellent.
[Example 2]
A fiber structure was obtained in the same manner as in Example 1, except that the polyurethane-based hot-melt resin used in Example 1 was changed to a high-viscosity type having a thickness of 10 μm (about 1.0×10 ⁵ poise/105° C.). Table 1 shows the evaluation results. The abrasion resistance was as excellent as in Example 1, the peel strength was superior to that in Comparative Examples 1 and 2, and the adhesiveness to the fabric was excellent even when the viscosity of the hot-melt resin changed.
[Example 3]
A plain weave fabric was woven using nylon 6 drawn yarns (56 Dtex/40 filaments) with a round cross section in common for warp and weft. The warp density was 177/2.54 cm and the weft density was 105/2.54 cm. The resulting fabric was scoured with sodium carbonate and surfactant and then set at 180° C. with a pin tenter. Furthermore, it dyed|stained by the following method. Acid dye (manufactured by Arkroma Japan Co., Ltd., trade name "Lanasyn Black M-DL p170") was adjusted to 5% Owf and treated at a bath ratio of 1:30 for 30 minutes at 100°C. Then, using an aqueous surfactant solution with a concentration of 1 g/L, soaping treatment was performed under the conditions of 60° C. for 10 minutes. Next, nylon fix 501 (manufactured by Senka Co., Ltd.) was used at 3% owf, and fix treatment was performed under reaction conditions of 80° C. for 20 minutes and a bath ratio of 1:30. The warp density after processing was 186/2.54 cm, and the weft density was 106/2.54 cm. A tape-shaped member made of the bonded fabric using the conjugate fiber of Example 1, which is made of a 10 μm thick low-viscosity type (about 3.0×10 ⁴ poise/105° C.) polyurethane-based hot-melt resin, and the above-mentioned circular cross-section fabric. and a fiber structure was obtained by the same bonding method as in Example 1. Table 1 shows the evaluation results. The wear resistance of the tape-shaped member was slightly improved by using the circular cross-section for the tape-shaped member. Moreover, the peel strength exceeded that of Comparative Examples 1 and 2, and even when the core-sheath composite fiber was used only for the bonded fabric, the adhesiveness of the fabric was excellent.

[Example 4]
The procedure of Example 3 was repeated except that the polyurethane-based hot-melt resin used in Example 3 was changed to a high-viscosity type having a thickness of 10 μm (approximately 1.0×10 ⁵ poise/105° C.). Table 1 shows the evaluation results. The wear resistance of the tape-shaped member was slightly improved by using the circular cross-section for the tape-shaped member. Moreover, the peel strength exceeded that of Comparative Examples 1 and 2, and even when the core-sheath composite fiber was used only for the bonded fabric, the adhesiveness of the fabric was excellent.
[Comparative Example 1]
A bonded fabric was obtained by ultrasonic bonding in the same manner as in Example 1 using the woven fabric with a circular cross section produced in Example 3. A 10 μm-thick low-viscosity type (approximately 3.0×10 ⁴ poise/105° C.) polyurethane hot-melt resin was sandwiched between the bonded fabric and a tape-shaped member made of a woven or knitted fabric with a circular cross section. A fiber structure was obtained by the adhesion method. Table 1 shows the evaluation results.
[Comparative Example 2]
The procedure was carried out in the same manner as in Comparative Example 1, except that the polyurethane-based hot-melt resin used in Comparative Example 1 was changed to a high-viscosity type with a thickness of 10 μm (about 1.0×10 ⁵ poise/105° C.). Table 1 shows the evaluation results.

11: Projection 12: Groove 13: Center point of circumscribed circle that most circumscribes the tip of the projected portion 14: Fiber diameter (diameter of circumscribed circle 13) D
21: Groove inlet width (W ₁ )
22: Center line of groove and groove depth (H)
23: Contact point between 22 and fiber polymer portion 24: Groove wide width (W ₂ )
31: Width of tip of protrusion (P _out )
32: Width of bottom surface of protrusion (P _min )
40: First cloth and second cloth to be joined 40a: First cloth 40b: Second cloth 41: Pair of ultrasonic joints 42: Pair of welding tools 43: Tape-shaped member 44: First cloth Joint portion of fabric and second fabric 400: Fiber structure 51: Base fabric used for tape-shaped member 43 52: Adhesive layer for bonding base fabric 51 and film layer 52 53: Film used for tape-shaped member 43 Layer 54: Hot-melt resin layer for laminating tape-shaped member and bonding fabric 61: Line A in peel strength measurement 62: Line B in peel strength measurement 81: Distribution hole for core component 82: Distribution hole for sheath component

Claims

A fiber structure having a joint portion where one end portion of a first fabric and one end portion of a second fabric are joined, and a tape-shaped member adhered to cover the joint portion, wherein the tape-shaped member is at least A first fabric, a second fabric, and the tape-shaped fabric comprising a base fabric and a hot-melt resin layer, the hot-melt resin layer being disposed on the side of the bonding surface with the joint, and constituting the joint. A fiber structure in which at least a part of a member base fabric is a fabric composed of synthetic fibers composed of monofilament filaments having a plurality of grooves continuous in the fiber length direction on the surface.
2. The fiber structure according to claim 1, wherein the number of grooves of said monofilament filament is 2-32.
3. The single fiber filament has a groove depth of 1.0 μm to 10.0 μm, a groove entrance width of 1.0 μm to 10.0 μm, and a projection tip width of 10.0 μm or less. A fiber structure made of the fabric according to .
The fiber structure according to any one of claims 1 to 3, wherein the cross-sectional shape of the single filament satisfies the following (formula 1) and (formula 2).
W 2 /W 1 ≧1.3 (Formula 1)
0.15≦H/D≦0.25 (Formula 2)
W 1 : Groove entrance width (μm)
W 2 : Width of wide portion of groove (μm)
H: Groove depth (μm)
D: fiber diameter (μm)