JPH0959847A - Polyester water-resistant woven fabric and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce a polyester water-resistant woven fabric having not only excellent water resistance but also a homogeneous hue on the surface and no skitteriness due to a difference in dyeing and further a soft surface touch, fullness, body and stiffness and provide a method for producing the woven fabric. SOLUTION: This polyester water-resistant woven fabric 20 is obtained by bundling several conjugate multifilament yarns prepared by surrounding the periphery of a large-size filament yarn 2 of >=2 denier size with plural fine-size filament yarns 3 of a flat cross section having <=0.9 denier size and using the resultant polyester fiber yarn in at least either of a warp and a weft yarns. Furthermore, the method for producing the woven fabric is to surround the periphery of a thick core component with a sheath component, disperse plural finer island components having the flat cross section than the core component in a sea component which is the sheath component, produce a core-sheath type conjugate yarn comprising at least two kinds of polyesters, bundle the core-sheath type conjugated yarns, provide the woven fabric, treat the resultant woven fabric with a solvent, dissolve and remove the sheath component of each core-sheath type conjugated yarn so as to leave the core and the island components.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a raincoat,
Umbrellas, polyester water resistant fabrics used for sports clothing and the like, and more particularly, to a method for producing the same, which has excellent water resistance and has a uniform surface hue that does not show flicker due to differences in shade or different colors, and is soft. Surface touch,
The present invention relates to a polyester water-resistant woven fabric having a feeling of swelling, firmness and elasticity, and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, as a technique for imparting high water resistance to a woven fabric, there are many methods such as weaving ultrafine fibers in high density, weaving multiple yarns having different shrinkage characteristics in high density, and combinations thereof. Proposed. These technologies have reached an almost satisfactory level of water resistance.

However, as described above, a woven fabric in which only ultrafine fibers are woven at a high density has the drawbacks that even if the water resistance is at a level at which there is no problem, the feel is paper-like and the feeling of fatigue is strong. It was In order to improve this, it has been proposed to employ a post-mixing method in which multi-filaments having different fineness are mixed in an appropriate subsequent step.

However, since filaments having different characteristics often have different dyeing properties, there is a problem in that when the coating is not perfect, unevenness in density or color difference is visible.

[0005]

SUMMARY OF THE INVENTION The object of the present invention is to solve the above-mentioned problems of the prior art and not only provide excellent water resistance, but also have a uniform surface hue and no irritability due to dyeing difference.
Another object of the present invention is to provide a polyester water resistant woven fabric having a soft surface touch, a feeling of swelling, firmness and elasticity, and a method for producing the same.

[0006]

A polyester waterproof fabric according to the present invention which achieves the above object is a composite in which a plurality of fine filaments having a fineness of 0.9 denier or less are surrounded by a filament having a fineness of 2 denier or more. Polyester fiber yarn bundled with multiple multifilament yarns
It is characterized by being used for at least one of the warp yarn and the weft yarn.

Further, in the method for producing a polyester waterproof fabric according to the present invention, a sheath component surrounds a thick core component,
At least 2 in which a plurality of island components having a flatter cross section thinner than the core component are dispersed in the sea component using the sheath component as the sea component
A core-sheath type composite yarn made of a polyester of various kinds is produced, and a plurality of the core-sheath type composite yarns are bundled into a non-twisted state yarn or a twisted yarn having a twist coefficient of 5000 or less, and the yarn is at least a warp yarn and a weft yarn. Used on one side with a cover factor of 2
500-3500 woven fabric, and then treating the woven fabric with a solvent to dissolve and remove the sheath component of the core-sheath type composite yarn so that the core component and the island component remain. is there.

In the present specification, the "twisting coefficient" is a numerical value given by the equation: twisting coefficient = twisting number × √denier. Further, the "cover factor" means a cover factor = (when the number of the warp or weft threads arranged in a line in the direction perpendicular to the warp or weft threads in the woven fabric is 2.54 cm. It is given by the formula of vertical thread density × √ denier) × (weft thread density × √ denier).

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be specifically described below with reference to the drawings. The polyester fiber yarn used as the warp yarn and / or the weft yarn of the polyester waterproof fabric of the present invention is configured as a yarn in which a plurality of composite multifilament yarns 1 made of polyester as shown in FIG. 1 are bundled. . The composite multifilament yarn 1 is configured such that a large-fineness filament 2 is used as a core portion and a plurality of fine-fineness flat filaments 3 are surrounded by the core portion. The cross-section of the fineness filament 2 may be circular as shown, or oval,
It may be non-circular such as multi-lobed. The fine cross section of the fineness filament 3 has a flat cross section in order to enhance the effect of covering the fineness filament 2.

1 composite multifilament yarn per thread
In the above, the number of the large fineness filaments 2 in the core portion is preferably one, but may be plural if necessary. The fineness must be 2 denier or more. The large-fineness filament 2 is an element that controls the strength of firmness and stiffness when formed into a woven fabric, and by setting the fineness to 2 denier or more in this way, necessary firmness and stiffness can be imparted.

It is desirable that the number of the fine-fineness flat filaments 3 arranged around the large-fineness filaments 2 is 4 to 12 times that of the large-fineness filaments 2. The number of fine fineness flat filaments 3 is changed to the number of large fineness filaments
It is possible to surround the large fineness filament 2 so as not to expose the periphery of the large fineness filament 2 by setting the number of the fineness filaments to 4 times or more, thereby suppressing the irregularity of the fabric caused by the dyeing difference with the large fineness filament 2. be able to. When the number of the fine-fineness flat filaments 3 exceeds 12 times the number of the fine-fineness filaments 2, the softness of the fine-fineness flat filaments 3 becomes too strong, and the elasticity and stiffness of the fabric brought about by the fine-fineness filaments 2 are reduced. Become so.

The cross section of the fine fineness flat filament 3 is flat, and more preferably, it is substantially elliptical. Further, the fineness of the flat filament 3 is set to 0.9 denier or less, and the flatness defined by the ratio of the minor axis to the major axis of the fiber cross section (major axis / minor axis) is set to 2 or more. Has been done. The fine filament flat filaments 3 having a fineness of 0.9 denier or less and a flatness of 2 or more form fine voids in the woven fabric by cooperating with each other, and are soft and smooth to the woven fabric. It not only gives a nice texture, but also provides excellent water resistance that prevents water droplets from penetrating inside the fabric.

In the present invention, the production of the polyester waterproof fabric based on the composite multifilament yarn 1 having the above-mentioned constitution is carried out as follows. First, 2
In the spinning / drawing step, the core-sheath type composite yarn 10 having a cross section as shown in FIG. 2 is produced using one or three kinds of polyester resins. This core-sheath type composite yarn 10 is composed of a thick core component A and a sheath portion B which is closely adhered to and surrounds the thick core component A. Further, the sheath portion B uses the sheath component B as a sea component, and has a sheath component B more than the core component A therein. A plurality of island components C having a thin and flat cross section are dispersed and arranged. The core-sheath type composite yarn 10 may be one in which the island component C in the sheath component B is arranged in a double annular shape as shown in FIG. In the core-sheath type composite yarn 10, the core component A becomes the large-fineness filament 2 and the island component C becomes the fine-fineness flat filament 3 by passing through the subsequent dissolving and removing step of the sheath component B.

Core-sheath type composite yarn 10 produced as described above
Are collected into a non-twisted yarn or a twisted yarn with a twisting factor of 5000 or less, which is woven as a warp yarn and / or a weft yarn.
When the twisting coefficient when twisting the plurality of core-sheath type composite yarns 10 is more than 5000, the convergence of the twisted yarns becomes too high, and the effect of improving the water pressure resistance when water pressure is applied to the woven fabric is impaired.

The weaving yarn is woven as warp yarns and / or weft yarns, and the weaving density after dyeing and finishing is set so that the cover factor is in the range of 2500 to 3500. When the cover factor is less than 2500, the obtained woven fabric does not exhibit sufficient water pressure resistance, and when it exceeds 3500, the woven fabric exhibits a paper-like texture.

The woven fabric obtained as described above is subjected to relaxing scouring and intermediate setting according to a conventional method, and then subjected to an elution step. By this elution step, the sheath portion B of the core-sheath type composite yarn 10 is dissolved and removed, the core component A becomes the independent large fineness filament 2 as shown in FIG. 1, and the island component C is separated into the fineness flat filament 3. To be done. At the same time, the latent stress of the fineness filament 2 disappears and the filaments contract.
It is desirable that the large fineness filament 2 is contracted so that the fineness and flatness filament 3 is loosened by about 5 to 20% by making a difference in yarn length.

In the woven fabric thus obtained, as shown in FIG. 4, in the woven fabric 20, one fine-fineness filament 2 is arranged around a single fine-fineness flat filament 3 in a loose state. The polyester water-resistant woven fabric according to the present invention is obtained by finally subjecting the woven fabric after the dissolving process to a dyeing process and a water repellent treatment. In the present invention, as the polymer used for the core portion A and the island component C of the core-sheath type composite yarn 10, a polyethylene terephthalate homopolymer containing terephthalic acid and ethylene glycol as the main polycondensation components, the acid component, A copolymer obtained by substituting a part of the diol component with an aromatic dicarboxylic acid such as phthalic acid or isophthalic acid and / or a diol such as diethylene glycol or triethylene glycol and polycondensing it is used. Further, a mixed polymer in which the homopolymer and the copolymer are mixed, or a mixed polymer in which different kinds of copolymers are mixed with each other can also be used.

The polymers of the core portion A and the island portion C may or may not have the same physical / chemical properties, but preferably, the polymer of the core component A has a heat shrinkage ratio. Polyesters having properties greater than those of island component C are preferably used. By selecting such a polymer, when the sheath component is dissolved and removed from the core-sheath type composite yarn 10 having a predetermined length and separated into the large fineness filament 2 and the fineness flat filament 3, the fineness flat filament 3 is The yarn length difference that makes the filament finer than the thick filament 2 is generated, and the fine filament flat filament 3 can be slackened around the filament fine filament 2. Such slack allows the woven fabric to have more bulge and higher water resistance.

The yarn length difference (loosening) of the fine fineness flat filament 3 with respect to the large fineness filament 2 is preferably 5 to 20%. If the yarn length difference is less than 5%, the fine filament flat filaments 3 cannot hold sufficient voids in the woven fabric, and as a result, the water resistance and softness of the woven fabric are reduced. On the other hand, when the yarn length difference is larger than 20%, the voids generated by the woven fabric become too large and water droplets easily infiltrate, so that the water resistance of the woven fabric is reduced. Also, the fineness filaments buckle on the way to roughen the surface of the woven fabric.

In the elution step of dissolving and removing the sheath component B of the core-sheath composite yarn, it is preferable to use an alkaline aqueous solution or hot water as the solvent. Therefore, as the polymer of the sheath component B, a polyester soluble in a heated alkaline aqueous solution or hot water is used, and a polymer different from the polymer used for the core portion A or the island portion C is used.

That is, as the polymer of the sheath component B,
For example, a copolymer in which a part of the acid component is replaced with 5-sodiumsulfoisophthalic acid or the like, a copolymer in which a part of the diol component is replaced with 2bis {4- (2-hydroxyethoxy) phenyl} propane, etc. Mixed polymers are used. The degree of solubility in a solvent can be indicated by an alkali weight loss ratio indicating how much the polymer to be eluted remains without being eluted. The alkali reduction ratio of the polymer of the sheath component B is preferably 30 or more, preferably 100 or more, and more preferably 500 or more with respect to the polymer of the core portion A and the polymer of the island component C, respectively.

Here, the alkali reduction ratio is obtained by the following method. That is, first, filaments having a circular cross section with the same fineness are prepared as polymers for measurement from polymers constituting the core component A, the sheath component B, and the island component C, and these samples are charged with a solvent (for example, a 3 wt% caustic soda aqueous solution). It is immersed in a bath having a bath ratio of 1: 125 at a temperature of 98 to 100 ° C.

By this dipping treatment, a part of the polymer from these samples is dissolved in the caustic soda aqueous solution, and the weight of the samples decreases, so that the weight of the remaining samples is 70% by weight.
Dipping time t0 (sheath component B), t
1 (core component A) and t2 (island component C) were measured,
If the ratio of the soaking time of the sheath component B to the soaking time of the core component A (t0 / t1) and the ratio of the soaking time of the sheath component B to the soaking time of the island component C (t0 / t2) are calculated, the respective weight reduction ratios are calculated. You can ask.

In the woven fabric obtained as described above, the large fineness filament 2 having a denier of 2 denier or more, which constitutes the composite multifilament yarn 1, can give appropriate elasticity and elasticity. Further, a fine fineness flat filament 3 of 0.9 denier or less arranged around the large fineness filament 2
Gives a soft and smooth texture to the fabric like ultrafine fibers, and surrounds the large fineness filament 2 in a state of being slackened by 5 to 20%. It is possible to suppress unevenness in dyeing due to the difference in shade and the difference in color, and to make the entire fabric a uniform hue.

Further, as shown in FIG. 4, since the fine fiber flat filaments 3 are exposed on the surface of the woven fabric, water droplets are prevented from entering the voids of the woven fabric, and the flat surface is further protected from the external water pressure. As a result, the fabric exhibits excellent water resistance. Further, in the method for producing a polyester waterproof fabric according to the present invention, a core-sheath type composite in which a core portion A which becomes a large fineness filament 2 and an island component C which becomes a fine fineness flat filament 3 are integrated by a sheath component B Since the yarn 10 is formed into a woven fabric, the fine-fineness flat filaments 3 do not separate from the large-fineness filaments 2 in the process of being processed into the woven fabric. Therefore, it is possible to obtain a woven fabric by making the weaving yarn in which the fine fineness flat multifilament 3 surely surrounds the periphery of the large fineness multifilament 2 without the complexity of the manufacturing process such as when the different filaments are mixed later. I'm out.

[0026]

【Example】

Example 1 As the core portion A, terephthalic acid and isophthalic acid of 7.1 were used.
2,2 bis {4- (2-
Polyethylene terephthalate copolymers obtained by copolymerizing 4.0 mol% of hydroxyethoxy) phenyl} propane, respectively, using polyethylene terephthalate as the island component C, and as the sheath component B,
5. Sodium sulfoisophthalic acid was added to terephthalic acid.
Using a polyethylene terephthalate copolymer obtained by copolymerization by adding 0 mol%, a melt spinning-drawing method was performed.
A 70-denier, 12-filament core-sheath type composite yarn having a cross-sectional shape shown in Fig. 2 was produced.

The core-sheath type composite yarn was twisted with a twisting factor shown in Table 1 to prepare a weaving yarn, and the weaving yarn was made into warp yarns and weft yarns, and a woven fabric having a cover factor shown in Table 1 was woven.

[0028]

[Table 1]

Next, the above fabric was subjected to relax scouring and intermediate setting treatment, and then immersed in a caustic soda aqueous solution having a concentration of 1% by weight at a temperature of 98 to 100 ° C. to elute the sheath component B. In addition, this fabric is
line Blue) 2% ^{OWF of} FBL (Disperse dye manufactured by Bayer)
Was dyed at 130 ° C. for 60 minutes, and dried and finished. Finally, this woven fabric was subjected to a water repellent treatment by a padding method (padding-drying-cure) using a water repellent treatment agent.

As the water repellent treatment agent in this treatment, 20 g of Asahi Guard AG-710 (manufactured by Asahi Glass Co., Ltd.)
/ L and Sumitex Resin M-3 (manufactured by Sumitomo Chemical Co., Ltd.) were used at 5 g / L. The evaluation results of the obtained dyed fabric are shown in Table 1. The water repellency of the woven fabric measured by the spray measurement method defined in JIS L-1092 was 100 (the water pressure resistance by the Shopper type water resistance test method was 750 mmH ₂ O). In addition, the texture of the woven fabric was excellent in softness, firmness, and firmness, and no dyeing unevenness was observed.

A part of the woven fabric was disassembled to collect warp yarns and weft yarns of a certain length, and the lengths of the large fineness filaments and the fineness filaments constituting them were measured. It was found that the filament was 15% longer than the large fineness filament, and was loosened accordingly. Example 2 Polyester terephthalate was used as the core portion A and the island component C, and 5 parts of terephthalic acid were used as the sheath component B.
70 denier, 12 filaments having a cross-sectional shape shown in FIG. 2 by a melt spinning-drawing method using a polyethylene terephthalate copolymer obtained by copolymerizing 7.0 mol% of sodium sulfoisophthalic acid The core-sheath type composite yarn was manufactured.

A twisted yarn having a twisting factor shown in Table 1 was applied to the core-sheath type composite yarn, and the warp yarn and the weft yarn were used as a warp yarn and a plain weave fabric having the cover factor shown in Table 1 was woven. Then, according to Example 1, stained under the same conditions-
The results of characteristic evaluation of the water-repellent woven fabric are shown in Table 1.

The fine-fineness filament was looser by 2% than the large-fineness filament. Example 3 A 70-denier, 12-filament core-sheath composite yarn in which the number of fineness filaments per composite yarn was 3 and the flatness was 5 was produced, and polyester water resistance was applied under the same conditions as in Example 2. A woven fabric was produced. The evaluation results are shown in Table 1.

As is clear from Table 1, the obtained woven fabric was greatly improved in dyeing unevenness and was sufficiently satisfactory in water repellency. Comparative Example 1 A polyester waterproof fabric was prepared under the same conditions as in Example 1, except that the fineness of the thick fine filament in Example 1 was changed to 1.5 denier and the core-sheath composite yarn of 75 denier and 12 filaments was used. Manufactured. The results of measuring the properties of the woven fabric are shown in Table 1.

As is clear from Table 1, the water repellency of this woven fabric was sufficiently satisfactory, but it lacked firmness and elasticity. Comparative Example 2 80 denier in which the fineness in Example 2 was changed to 1.0 denier and the flatness was changed to 1.5 and the number of fineness filaments per composite yarn was changed to 3, A 12-filament core-sheath type composite yarn was produced. This core-sheath type composite yarn is used as a warp yarn and a weft yarn which are twisted with the twisting factor shown in Table 1 and used in Table 1
A flat woven fabric having a cover factor shown in was produced.

This woven fabric was subjected to dyeing and water repellent treatment under the same conditions as in Example 1 to evaluate the woven fabric properties.
It was as shown in. As is clear from Table 1, the obtained woven fabric was improved in dyeing irritability, but the water repellency was not sufficiently satisfied, and the feeling of softness was insufficient. Comparative Example 3 A polyester waterproof fabric was produced under the same conditions as in Example 1 except that the same yarn as that used in Example 1 was used and only the twist coefficient was changed to 5422. The results of evaluation of the fabric properties are shown in Table 1.

As is clear from Table 1, the dyeing irregularity of this woven fabric was improved, but the water repellency was not sufficiently satisfactory, and the texture was lacking in softness. Further, the fine filament flat filament was the same yarn as the yarn of Example 1, but the slack was 5%. Comparative Example 4 A polyester waterproof fabric was produced under the same conditions as in Example 1 except that the same yarn as that used in Example 1 was used and a fabric having a cover factor of 2200 was used.

The results of evaluation of the fabric properties are shown in Table 1. From the results shown in Table 1, there was no dyeing irregularity of the woven fabric, but the water repellency was not satisfactory. Comparative Example 5 30 denier with 18% boiling water shrinkage, 12 filament polyester yarn and 30 denier with 7% boiling water shrinkage,
A 72-filament polyester yarn was mixed and processed with compressed air at the same supply rate, and then twisted at 260 T / m to make a woven yarn.

Using this yarn, a woven fabric which was woven, dyed and treated to be water repellent under the same conditions as in Example 1 was produced. The results of evaluation of the fabric properties are shown in Table 1. As is clear from Table 1, this woven fabric was satisfactory in water repellency and had a good texture, but the fabric quality was not good due to dyeing unevenness.

[0040]

As described above, the polyester water resistant woven fabric of the present invention has the same excellent water resistance as that of the prior art, but is free from the unevenness of dyeing caused by the difference in shade and the difference in hue and is uniform. It can have a surface hue. Also, with a soft surface touch and swelling,
It is possible to exert a firm and firm effect.

Further, according to the method for producing a polyester waterproof fabric of the present invention, the fine fineness flat filaments can be surely arranged around the large fineness filaments, and the polyester waterproof fabric having the above excellent effects can be efficiently produced. Can be manufactured well.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a composite filament yarn used in a polyester waterproof fabric of the present invention.

FIG. 2 is a cross-sectional view of a core-sheath type composite yarn before dissolving a sheath component to obtain the composite filament yarn of FIG.

FIG. 3 is a cross-sectional view of a core-sheath composite yarn according to another embodiment.

FIG. 4 is a partial cross-sectional view of a polyester waterproof fabric according to the present invention.

[Explanation of symbols]

 1 Composite multi-filament yarn 2 Thick fine filament 3 Fine fine flat filament 10 Core-sheath composite yarn 20 Polyester waterproof fabric A Core portion B Sheath portion C Island component

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Claims (7)

[Claims] 1. A polyester fiber yarn obtained by bundling a plurality of composite multifilament yarns in which a plurality of flat filaments having a fineness of 0.9 denier or less and a plurality of flat filaments having a fineness of 0.9 denier or less are bundled around a filament having a fineness of 2 denier or more, a warp yarn and a weft yarn. A polyester waterproof fabric used for at least one of the threads. 2. The polyester water resistant according to claim 1, wherein the polyester fiber yarn obtained by bundling a plurality of the composite multifilament yarns is a non-twisted yarn or a twisted yarn having a twist coefficient of 5000 or less, and a cover factor in a woven fabric is 2500 to 3500. Fabric. 3. The polyester water resistant woven fabric according to claim 1, wherein the flatness represented by the ratio of major axis / minor axis of the fiber cross section of the fine fineness flat filament is 2 or more. 4. The number of the fine-fineness flat filaments is 4 to 12 times that of the large-fineness filaments.
The polyester waterproof fabric according to any one of 1 to 3. 5. The polyester water resistant woven fabric according to claim 1, wherein the fine fineness flat filament has a slack of 5 to 20% with respect to the large fineness filament. 6. At least two species in which a sheath component surrounds a thick core component, and the sheath component is used as a sea component and a plurality of island components having a flatter cross section smaller than the core component are dispersed in the sea component. A core-sheath type composite yarn made of polyester is produced, and a plurality of the core-sheath type composite yarns are bundled into a non-twisted state yarn or a twisted yarn having a twist coefficient of 5000 or less, and the yarn is used as at least one of a warp yarn and a weft yarn. And the cover factor is 250
A method for producing a polyester water-resistant woven fabric, which comprises weaving a woven fabric of 0 to 3500 and then treating the woven fabric with a solvent to dissolve and remove the sheath component of the core-sheath type composite yarn to leave the core component and the island component. . 7. The polyester waterproof fabric according to claim 6, wherein after the sheath component is dissolved and removed, the fineness of the core component is 2 denier or more and the fineness of the island component is 0.9 denier or less. Production method.