JPH04126839A - Creped high-density woven fabric - Google Patents

Abstract

PURPOSE:To obtain the title woven fabric having excellent waterproof properties and air permeability and suitable for clothing, bag, umbrella, etc., by forming a fibril bundle having specific fineness into weft and combining the fibril bundle with a spun yarn and forming irregular crepe by difference of shrinkage. CONSTITUTION:(A) A polyamide such as nylon 6 and (B) polyester such as polyethylene terephthalate are conjugated into side by side type filament and the filament is used as a weft. On the other hand, the resultant filament is doubled with (C) spun yarn such as cotton yarn to afford a combined yarn and the combined yarn is used as warp and the above-mentioned weft and warp are woven and then the woven fabric is treated with a fibrillating agent (e.g. aqueous solution of acetic acid) to split the conjugate filament and then subjected to heat treatment with seam at 70-120 deg.C to provide the aimed woven fabric being <=0.5 denier in average single fiber fineness of filament.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention provides a grained high-density material that has excellent waterproofness and appropriate breathability, and has a unique texture due to the formation of fine grains on its surface. It concerns textiles.

[Conventional technology]

Fabrics for clothing filled with feathers (down) and windproof and cold protection clothing have traditionally been made by weaving fine-count cotton threads at high density in the warp and weft, followed by resin treatment, 2-surface pressing, etc. A high-density woven fabric is used. Such high-density woven fabrics have the advantage that they themselves have a certain degree of waterproofness, and that their waterproofness can be easily increased by processing with resin or the like. However, the above-mentioned high-density woven fabrics have problems in that they have poor weaving efficiency because they must be woven by inserting thin threads at high density in the warp and weft, and the resulting woven fabrics are thick and do not have a good texture. In addition, products whose waterproof properties are improved by resin processing or the like have the disadvantage that the effect weakens over time.

In contrast, the present applicant uses a special fibrillated composite filament and splits the fibrillated composite filament after weaving to give heat shrinkage.
We have developed a method for increasing the density of textiles and have already obtained the rights to it (Japanese Patent Publication No. 8535/1985). According to this method, weaving efficiency is high because the weaving process is the same as for ordinary textiles, and since the resulting textile is ultra-high density, the structure of the weaving structure itself provides appropriate breathability and waterproofness. It has the advantage that no special resin processing is required. It has the advantage that its surface is extremely smooth and has excellent level dyeing properties.

[Problems to be solved by the invention] However, the high-density woven fabric using the above-mentioned special fibrillated composite filament lacks depth due to its smoothness, has a slightly hard texture, and is required to be more flexible. It became so. Therefore, the present applicant has created false twisted monofilament yarns having a fineness of 20 times or more of the average single fiber fineness of a fibril bundle obtained by splitting the above-mentioned filaments into warp yarns using the above-mentioned special fibrillated composite filaments for the weft yarns. When used, the shrinkage difference between the fibril bundle and the monofilament creates a soft texture and
It has been discovered that subtle grain shading can be obtained, and an application has already been filed (Japanese Patent Application Laid-open No. 636130). However, since this improved high-density fabric uses monofilament as the warp, it has the disadvantage that if the fibril bundles, which are the weft, are greatly shrunk, the weave becomes coarse and sufficient waterproofness cannot be achieved. ing.

The present invention was made in view of the above circumstances, and an object thereof is to provide a high-density fabric that is grained, has a good texture, and has excellent waterproof properties, and a method for producing the same.

[Means to solve the problem]

In order to achieve the above object, the grained peddler density fabric of the present invention is provided, in which the weft is composed of a bundle of fibrils derived from fibrillated composite filaments and has an average single filament fineness of 0.5 denier or less, and the warp is composed of the weft and the above-mentioned weft. A woven fabric made of a composite yarn in which similar fibril bundles and spun yarns are combined in such a way that the appearance of the fibril bundle portion and the appearance of the spun yarn portion on the outer peripheral surface are irregular, Fine wrinkles are irregularly formed on the surface of the fabric due to the difference in shrinkage between the fibril bundle and the spun yarn, and the wrinkles give irregular wavy shadows.

[Function] That is, the present inventors have conducted a series of studies in order to obtain a high-density textile that is grained and has excellent waterproof properties. As a result, a fibrillated composite filament similar to that used in the invention of the previous application was used as the weft, and
If the fibrillated composite filament and the spun yarn are combined so that their appearance on the outer circumferential surface is irregular, and a composite yarn is used as the warp yarn, the portion where the weft yarn appears on the surface of the fabric is The fine fibril bundles originating from the above-mentioned special composite filament always appear regularly in the same direction, while in the area where the warp yarns appear, due to the irregularity of the outer peripheral surface of the composite yarn, 100% fibril bundles appear in some parts. We found that in some areas, both fibril bundles and spun yarns appeared, and that the way they appeared (the proportion of fibril bundles and spun yarns appearing on the outside) was uneven.

In addition, the direction of the thread flow in the exposed part of the warp threads may not be aligned in the same direction due to different inclination angles due to the twist of the composite thread itself, or the direction of the thread flow may be changed by combining threads with different twist directions. It was found that the surface was highly variable, tilting to the right or to the left depending on the location. And this fabric is subjected to heat shrinkage.
The fibril bundles used for the warp and weft shrink at a high shrinkage rate, resulting in a very dense woven structure that exhibits high water resistance.Moreover, as shown above, the fibril bundles and spun yarns appear irregularly on the fabric surface. They found that the parts contract at different shrinkage rates, causing uneven distortion, and as a result, fine wrinkles are formed irregularly across the fabric surface, and these wrinkles give a wavy, irregular shadow. invention has been achieved.

Next, this invention will be explained in detail.

In this invention, the fibril bundles constituting part of the warp and the weft are derived from fibrillated composite filaments, and after weaving a fabric using the fibrillated composite filaments, it is woven with a predetermined fibrillating agent. Obtained by splitting.

The above-mentioned fibrillated composite filament is one in which polyamide and a polymer (such as polyester) that has no affinity with the above-mentioned polyamide are joined along the longitudinal direction by composite spinning, and specifically, In its cross section, both components A and B (either of which can be a polyamide component) have a side high side type as shown in Figure 1 (1), and a side high side type as shown in Figure 1 (2L (3)). The side-by-side repeating type shown in the same figure (4
) to (8), the component A has a radial shape and the other component B has a shape that complements this radiating part. A component consisting of a component A having a shape and another component B having a shape that complements this radiating part, with one radial shape being interrupted at the center side, and as shown in the same figure (11), it is a side-by-side repeating type and is hollow. Examples include those that have a section.

Examples of the polyamide that is one component of the composite filament include nylon 4. Nylon 6, Nylon 7, Nylon 11. Nylon 12. Nylon 66, nylon 6.
10. Examples include polymethaxylene adipamide, polyvaraxylylene decanamide, polybiscyclohexylmethanedecanamide, and copolyamides containing these components.

Polyesters, polyolefins, and polyacrylonitrile are examples of polymers that have no affinity with polyamides and that form composite filaments together with the above polyamides. Polyolefins are preferred, and polyesters are most suitable. That is, when a combination of polyamide and polyester is used, the color tone, gloss, texture, etc. of the obtained fabric are most preferable. Examples of the polyester include polyethylene terephthalate, polytetramethylene ethylene terephthalate-1, polyethylene oxyhenzoate, poly 1,4-dimethylcyclohexane terephthalate, polypiparolactone, and copolyesters containing these as components. Examples of the polyolefin include polyethylene, polypropylene, and copolyolefins containing these components.

Composite filaments made by combining the above two components are usually produced by a physical impact such as mechanical bending or friction, or by a chemical method in which the polyamide is swollen with a chemical solution, since the polymers have no affinity for each other. By,
It can be split into bundles of thin fibrils. An example of such a chemical solution (fibrillating agent) is benzyl alcohol.

Examples include β-phenylethyl alcohol, phenol, m-cresol, formic acid, and acetic acid. It is more suitable to use these as an aqueous solution or an aqueous emulsion than to use them directly. Particularly, it is preferable to use an aqueous emulsion of benzyl alcohol in terms of the shrinkability and fibrillation effect of the fabric, and also because it is relatively easy to handle.

In this invention, the average single fiber fineness of the fibril bundle obtained by splitting the composite filament must be 0.5 denier or less. That is, if the average single yarn fineness exceeds 0.5 denier, the shrinkage rate of the weft yarns will decrease and the texture of the resulting fabric will also deteriorate. The above-mentioned "average single yarn fineness J" is defined by (single yarn fineness before fibrillation)/(number of single yarn fibers after fibrillation). When the single filament fineness of a composite filament is 2 denier and the composite filament becomes nine single filaments (fibrils) by splitting as shown in FIG. 2, the average single filament fineness is 0. 2 denier.

In order to satisfy this condition, the weight ratio of the polyamide and the polymer that has no affinity with the polyamide must be 1:4 to 4:
It is preferable to set it to 1. Outside this range,
After fibrillation, thick single fibers tend to remain.

On the other hand, the composite system used for the warp in this invention is a combination of the same composite filament and spun yarn as described above. Various types of spun yarn are used as the above-mentioned spun yarn, such as cotton yarn, silk yarn, wool-polyester blend yarn, and 100% polyester yarn, and the thickness thereof varies depending on the type of yarn, but is 180~
It is preferable to use 45 denier. The twisting direction of this spinning system may be either the S direction or the Z direction, and there is no problem even if it is used as a single yarn or as a double yarn. However, when double yarns are used, the distortion on the surface of the fabric due to the twisting of the spun yarns is averaged out more than in the case of single yarns, so the shadows caused by the grains become weaker and the effect of this invention becomes weaker. Therefore, it is preferable to use a single spun yarn.

The above-mentioned spinning system and composite filament may be combined by twisting them in the same way as normal plying, or by interlacing them. good. However, it is preferable to combine the yarns by plying and twisting, since the resulting composite yarn will be more strongly twisted, and the resulting fabric will have darker shadows due to the grain. Further, it is preferable that the number of twists during plying and twisting is set to 400 to 600 T/M. This is because if the twist is too loose, the distortion of the irregularities on the surface of the obtained fabric will be small and the wrinkles will not be clear, and if the twist is too much, the fibers will not be split sufficiently.

This invention uses the special composite filament as a weft,
After weaving the above-mentioned composite yarn as a warp according to a conventional method, the woven fabric is soaked in the fibrillating agent or padded and split along the longitudinal direction to form a thin fibril bundle, and then heated at 70°C. or more, preferably 90-1
By heat treatment with water fumes at 20° C., preferably 90 to 100° C., the fibril bundles forming part of the warp and all of the weft are shrunk by 10 to 40%, and the other portions of the warp are formed. By shrinking the spun yarn by 0 to 5%, the desired grained density fabric can be obtained. As schematically shown in FIG. 3, the fabric thus obtained has irregularly uneven wrinkles formed on the surface of the fabric, and these wrinkles give clear shading in a wavy manner. Irregular wrinkles are formed in this way because, as schematically shown in Figure 4, fine fibril bundles originating from the above-mentioned special composite filaments are always present on the surface of the fabric where the weft threads appear. 1 appears regularly in the same direction, while in the part where the warp threads appear, 100% fibril bundle 1 appears in a certain part P, and 100% fibril bundle 1 appears in a certain part Q
This is thought to be due to the fact that both the fibril bundle 1 and the spun yarn 2 appear, and the manner in which they appear (the ratio at which the fibril bundle 1 and the spun yarn 2 appear on the surface) is uneven. In addition, the direction of the thread flow in the exposed part of the warp may vary depending on the location due to the twist of the composite system itself, or the direction of the thread flow may be tilted to the right by combining threads with different twist directions. One reason may be that the surface is tilted to the left and has a very varied surface. That is, as mentioned above, the portions of the fibril bundle 1 and the spun yarn 2 that appear irregularly on the surface of the fabric contract at different shrinkage rates, producing uneven distortion, and as a result, fine wrinkles appear on the entire surface of the fabric. are formed irregularly, and these wrinkles give a wavy, irregular shadow. And this textile is a sutra.

Since the fibril bundle 1 used in the weft is shrunk at a high shrinkage rate, it has a very dense woven structure and exhibits excellent water resistance. By the way, the fabric of this invention is 400 to 6
It has been measured that it exhibits water pressure resistance of 0.00 m/m.

Next, examples will be described together with comparative examples.

[Examples 1 to 3, Comparative Examples 1 to 3] High-density woven fabrics were made under the conditions shown in the table below, and the degree of grain formation of each sample was observed with the naked eye, and the texture was evaluated. In addition, its water pressure resistance (according to JISL-1092) was measured.

These results are also shown in the table below.

(Hereinafter, blank spaces) From the above results, it can be seen that the grained peddler density fabric of the present invention is superior to the comparative example product in terms of sharpness of the grain, texture, and waterproofness.

〔Effect of the invention〕

As described above, in the Shibo Peddler Density Fabric of the present invention, the weft is composed of fibril bundles derived from fibrillated composite filaments, and the warp is composed of a composite yarn obtained by splicing the same fibril bundle and spun yarn as described above. The fibril bundles and spun yarns appear irregularly on the surface of the fabric, and due to the irregular distribution, the fibril bundles and spun yarns shrink at different shrinkage rates, resulting in fine particles. Warts are forming. Therefore, these grains give a wavy and irregular shadow, giving a calm appearance. In addition, since the fibril bundles used in the warp and weft shrink at a high shrinkage rate, the woven structure becomes extremely dense and exhibits excellent waterproof properties. Therefore, it can be applied to various fabrics that require water resistance, such as clothing, bags, umbrellas, etc., and it is possible to provide products with unprecedented high added value.

[Brief explanation of drawings]

Figure 1 (1), (2), (3), (4), (5
), (6), (7), (8), (9). 00) and (11) are cross-sectional views showing examples of fibrillated composite filaments used in the present invention, FIG. FIG. 3 is a schematic plan view showing the state of the surface of the fabric of the present invention, and FIG. 4 is a schematic explanatory diagram of the weaving structure of the surface of the fabric.

Claims (2)

[Claims] (1) The weft is composed of a fibril bundle with an average single filament fineness of 0.5 denier or less derived from fibrillated composite filaments, and the warp carries the same fibril bundle and spun yarn as the weft to its outer peripheral surface. A woven fabric composed of composite yarns that are combined so that the appearance of the fibril bundle portion and the appearance of the spun yarn portion are irregular, and the woven fabric is A grained high-density fabric characterized in that minute grains are irregularly formed on the surface, and the grains give irregular wavy shading. (2) The grained high-density fabric according to claim (1), which has a water pressure resistance of 400 to 600 m/m.