JPH0791726B2 - Linen texture fabric - Google Patents

Description

The present invention relates to a fabric having a linen-like texture.

(Prior Art) It is well known that various studies have been made to impart a special texture to the surface of a woven fabric using synthetic fibers, and as a result, many successes have been achieved. Among them, as a method of eliminating the slimy feeling and giving a sharpness and a refreshing feeling, (1) silk and thin yarn, (2) atypical cross-section asymmetric shrinkage yarn, (3) partially fused yarn and fiber by alkali reduction It is well known that techniques such as finely roughening the surface, (4) blending an extractable substance into an aggregate, melt spinning, and then extracting this to form irregularities on the fiber surface are used. However, it is also well known that these have drawbacks such as insufficient effect or deterioration of fiber physical properties.

On the other hand, in addition to these techniques, for example, in JP-A-56-127660, a thermoplastic polymer (polyethylene terephthalate or polybutylene terephthalate) contains a polymer which is non-reactive with the polymer and has a glass transition temperature [ A method in which an amorphous polymer (polysulfone) having a Tg] of 150 ° C. or higher is added and mixed to form a hemispherical convex portion on the fiber surface portion has been proposed as an effective means for producing a sharpness.

(Problems to be solved by the invention) However, when this is actually done, there is a problem that thread rupture or fluffing may occur due to an improper combination of both polymers, resulting in poor operability. The reality is that we have not yet reached the stage of practical application in order to obtain woven fabrics with excellent feeling.

The present invention is manufactured with good operability in view of the current situation, and from the excellent quality fibers formed on the surface of the fine projection-like projections capable of imparting a sufficient shearing feeling to the fabric, which has not been obtained in the past. It is an object of the present invention to provide a hemp-like woven fabric produced by using the following multifilament fiber yarn as a warp or weft or a warp or weft.

(Means for Solving Problems) That is, the present invention relates to polyethylene terephthalate (A).
And a polyarylate (A), which is a composite fiber formed of a heterogeneous mixture (C) with the polyarylate (B) and the polyethylene terephthalate (A), and which constitutes the heterogeneous mixture C). The mixing ratio with B) is A: B = 70: 30 to 97: 3 by weight, and the composition ratio of the heterogeneous mixture (C) and polyethylene terephthalate (A) is C: A = 1: 3 by weight. ~ 1: 5,
A hemp-like woven fabric, wherein a multifilament fiber yarn made of the composite fiber having a single yarn fineness of 1 denier or more is woven as a warp or a weft. Furthermore, the composite fiber has a modified cross section, and the hot water shrinkage of the modified cross-section composite fiber constituting the multifilament fiber yarn is partly high shrinkage of 15 to 40%, and the rest low shrinkage of 6% or less. The gist is the above-mentioned linen-like textured fabric.

Hereinafter, the hemp-like textured fabric according to the present invention (hereinafter referred to as “the present invention fabric”)
Say. ) This configuration will be described in detail.

First, the woven fabric of the present invention is polyethylene terephthalate (A).
And polyarylate (B) are mixed non-uniformly to form a non-uniform mixture (C), and the non-uniform mixture (C) and polyethylene terephthalate (A) are discharged from the discharge hole of the same spinneret to form fibers. A texture fabric for hemp, characterized in that a multifilament fiber yarn made of a composite fiber having a single yarn fineness of 1 denier or more is woven into a warp or a weft or a warp or weft. The heterogeneous mixing ratio of the polyethylene terephthalate (A) and the polyarylate (B) is A: B = 70: 30 to 97: 3 by weight, and the heterogeneous mixture (C) and the polyethylene terephthalate (A). The composition ratio is C: A = 1: 3 to 1: 5 by weight.

Further, as an embodiment of the woven fabric of the present invention, the conjugate fiber is made to have an atypical cross section, and the hot water shrinkage ratio of the atypical cross section conjugate fiber constituting the multifilament fiber yarn is 15 to 40% for some fibers. High shrinkage, other balance fiber is 6%
There is a woven fabric in which the yarn is used as a warp or a weft or a warp or a weft so as to have the following two types of low-shrinkage hot water shrinkages.

The polyarylate of the woven fabric of the present invention is an aromatic polyester having bisphenols and a terephthalic acid / isophthalic acid mixture as constituent components, and comprises an acetic acid ester of bisphenol and an aromatic dicarboxylic acid (terephthalic acid / isophthalic acid mixture). Is a polymer synthesized by utilizing the reaction (melt polymerization), the reaction of bisphenol with an aromatic dicarboxylic acid chloride (melt polymerization or interfacial polymerization), and the like. The glass transition temperature [Tg] of these polyarylates is 180-200 ℃
And has a higher [Tg] as compared with ordinary polyethylene terephthalate.

In the constitution of the woven fabric of the present invention, the fineness of the single yarn fiber of the multi-filament fiber yarn is set to 1 denier or more so as to impart a crispness and a refreshing sensation necessary for making the woven fabric of the present invention into a hemp-like texture. For that purpose, the fineness of the single yarn fiber needs to be at least 1 denier or more, and if necessary, it is preferably 3 denier or more and 5 denier or less.

In the constitution of the woven fabric of the present invention, the non-uniform mixture ratio of the polyethylene terephthalate (A) and the polyarylate (B) of the non-uniform mixture (C) is A: B = 70: 30 to 97: 3 by weight. This is because it is necessary to form fine protrusions on the surface of the fabric, that is, the surface of the fiber, in order to impart the above-mentioned softness and refreshing feel to the fabric, and the above setting is required to obtain this. Therefore, it is more preferable that A: B = 70: 30 to 95: 5.

The heterogeneous mixture (C) means that the mixture of (A) and (B) is non-uniform, and (A) and (B) form independent phases. It is shown that such a mixed state exists. As a result, in the cross section of the fiber, (B) is dispersed in (A) in a size of the order of several tens of μm or more, and thus it is possible to form fine protrusion-like projections on the fiber surface. It was done.

Further, in the constitution of the woven fabric of the present invention, the heterogeneous mixture (C) is composed of the heterogeneous mixture (C) and the polyethylene terephthalate (A) in a weight ratio of C: A = 1: 3 to 1: 5. If the amount of polyethylene terephthalate (A) is too large, the spinnability in the process for producing the raw yarn will be deteriorated. On the contrary, if the amount of polyethylene terephthalate (A) is too large, the novel texture desired by the present invention cannot be obtained.

In the embodiment of the woven fabric of the present invention, the cross section of the composite fiber constituting the multifilament fiber yarn is a modified cross section, and the fiber has a high yield of hot water shrinkage of 15 to 40% and a low yield of hot water. The reason why the shrinkage rate is 6% or less is to give the fabric a soft and voluminous feel, that is, two types of hot water shrinkage rate of high and low of irregular cross section. For the first time, the use of the fibers having the same makes it possible to impart to the woven fabric the above-mentioned soft voluminous feel required by the linen-like woven fabric.

(Operation) In the woven fabric of the present invention, since the woven fabric has a hemp-like texture, a sharpness and a refreshing sensation are provided, and it is possible to form fine protrusions on the surface of the woven fabric, that is, the fiber surface. is necessary. In the present invention, and using a composite fiber as a constituent fiber of the multifilament yarns used as warp and weft, the glass transition temperature "T _A g of polyethylene terephthalate, a component of the composite fiber (A)], other The temperature difference between the glass transition temperature [T _B g] of the polyacrylate (B), which is the mixed component of the heterogeneous mixture (C), which is a constituent of the polyethylene terephthalate (A), and the heterogeneous mixture ( the undrawn yarn of composite fibers from the C) are fibers formed, is higher than the glass transition temperature [T _a g] temperature of the polyethylene terephthalate (a),
Stretching is performed at a temperature lower than the glass transition temperature [T _B g] of the mixed component polyarylate (B) of the heterogeneous mixture (C), and highly oriented melt spinning is performed at a winding speed of preferably 5000 m / min or more, and then all at once. When highly oriented fibers are obtained, the polyarylate (B) part, which is a mixed component of the heterogeneous mixture (C), is difficult to stretch. Therefore, it is necessary to form fine protrusions on the fiber surface. It becomes. The size, shape, number, etc. of the convex portions formed in this way are determined by the weight mixing ratio and mixing conditions of polyethylene terephthalate (A) and polyarylate (B), which are mixed components of the heterogeneous mixture (C), A: B = 70: 30-97: 3, preferably A: B = 70: 30-
By changing variously within the range of 95: 5, or the glass transition temperature of polyethylene terephthalate (A) [T
_A g] and the glass transition temperature of polyarylate (B) [T _B g]
Of the temperature difference, further, depending on the yarn winding speed during melt spinning, cooling conditions, temperature during drawing, draw ratio, etc., these items are appropriately adjusted to obtain a desired product. .

The height of the protrusions of the convex portions formed is preferably on the order of several hundred mμ to several μ, and the size in the fiber axis direction and the direction perpendicular to the fiber axis is also preferably on the order of several hundred mμ to several μ.

In addition, in order to impart to the woven fabric of the present invention, which has a soft and voluminous feel required for a hemp-like woven fabric, a composite fiber, which is a constituent fiber of a multifilament fiber yarn,
The hot water shrinkage has a high shrinkage of 15 to 40% and the low shrinkage is 6% or less. Regarding the high-contraction hot water shrinkage in this case, the maximum obtained at this stage is around 15%, and it is not possible to obtain the high 40% hot water shrinkage as in the case of the fabric of the present invention. Although it was difficult in terms of operation control such as contact with a stretching heater and heater temperature control, in the present invention, heat can be easily applied by mixing the polyarylate (B) with the polyethylene terephthalate (A) inhomogeneously. It is possible to obtain a high rate of water shrinkage, and further obtain a high rate of hot water shrinkage by adjusting the mixing ratio of polyarylate (B) to polyethylene terephthalate (A). it can.

(Example) First, a heterogeneous mixture (C) of 85 parts by weight of polyethylene terephthalate (A) and 15 parts by weight of polyarylate (B) and polyethylene terephthalate (A) were mixed at 1:
An unstretched yarn was obtained by spinning the side-by-side type flat cross-section composite yarn through the same discharge hole at a weight ratio of 5, and this was stretched to obtain a shrinkage yarn of 75d / 24f with a hot water shrinkage ratio of 5.8%. This was used as a yarn for the present fabric 1.

Next, the unstretched yarns were drawn to obtain a different shrinkage of 75d / 24f in which the high-shrinkage-side fibers had a hot water shrinkage of 38% and the low-shrinkage-side fibers had a hot water shrinkage of 5%. A yarn was obtained and used as a yarn for the woven fabric 2 of the present invention.

For comparison, only polyethylene terephthalate (A) was used to spin a flat cross-section yarn to obtain an undrawn yarn, which was drawn to obtain a 75d / 24f shrinkable yarn having a hot water shrinkage ratio of 5%. This was used as a yarn for Comparative Example Fabric 1.

The unstretched yarn obtained for the yarn for Comparative Example woven fabric 1 was used and stretched to make the hot shrinkage of the high shrinkage side fiber 34% and the hot shrinkage of the low shrinkage side fiber 5 % Of 75d / 24f different shrinkage yarn was obtained, and this was used as the yarn for the comparative fabric 2.

Using these yarns for warp and weft, warp density of 85 /
Weaving was carried out according to the Habutae standard of inch and weft density of 84 threads / inch, and then dyed and finished.

Table 1 shows the feeling evaluation results of the obtained woven fabrics.

In the table, A is polyethylene terephthalate, B is polyarylate, and C is a heterogeneous mixture. In addition, the evaluation of the feeling was performed by a sensitivity test and expressed as follows.

・ Mitsuzawa ○: Soft ×: Strong ・ Squash and volume feeling ◎: Good ○: Normal △: Slightly bad ×: Poor In the woven fabrics 1 and 2 of the present invention using the composite fiber, the presence of fine projection-like protrusions on the surface was observed by an electron microscope, and therefore, as shown in Table 1, the feeling of shearing was good, In addition, it is considered that the polyester filament woven fabric did not emit a strong metallic-like solid light and exhibited a soft gloss. Further, since the woven fabric 2 of the present invention using the composite different shrinkage fiber is an irregular yarn bundle having both bulges in both the warp and the weft, it gives a bulging feeling to the woven fabric and the voluminous feel of the fabric is very good. Has become.

On the other hand, Comparative example woven fabrics 1 and 2 using the non-composite fiber had poor sheariness and gloss except that Comparative example woven fabric 2 using the different shrinkage yarns had a good volume feeling.

(Effects of the Invention) Since the woven fabric of the present invention has the above-mentioned constitution, fine convex protrusions are formed on the woven fabric surface by the composite fibers constituting the multi-filament fiber yarn used as the warp and the weft. By imparting a good shearing feeling to the woven fabric, and by giving the fiber a modified cross-section fiber having a high shrinkage difference, the soft voluminous sensation is imparted to the woven fabric in a much better condition, which is an excellent linen which has never been seen before. It is a woven fabric.

 ─────────────────────────────────────────────────── --- Continuation of front page (56) Reference JP-A-56-127660 (JP, A) JP-A-62-104935 (JP, A) JP-A-62-223322 (JP, A) JP-A-57- 171755 (JP, A)

Claims (2)

[Claims] 1. A composite fiber formed by a non-uniform mixture (C) of polyethylene terephthalate (A) and polyarylate (B) and polyethylene terephthalate (A), wherein the non-uniform mixture (C) is used. Constituting polyethylene terephthalate (A) and polyarylate (B)
The mixing ratio by weight of A: B is 70: 30-97: 3, and the mixing ratio of the heterogeneous mixture (C) and polyethylene terephthalate (A) is C: A = 1: 3 by weight. A hemp-like woven fabric characterized by being woven using a multifilament fiber yarn composed of the composite fiber having a single yarn fineness of 1 denier or more at a ratio of 1: 5, as warp yarns or weft yarns or warp yarns. 2. The hot water shrinkage ratio of the composite fiber having an atypical cross section, which is a composite fiber having a modified cross section, is a high shrinkage ratio of 15 to 40%, and a balance of a low shrinkage ratio. 6
% Or less, the hemp-like textured fabric according to claim 1.