JPH0665854A - Production of woven fabric having light shielding property - Google Patents

Abstract

PURPOSE:To impart excellent light shielding properties and hand to a woven fabric. CONSTITUTION:This method for producing a woven fabric having light shielding properties is to use cellulosic fiber as warp yarn exposed to the front and back surfaces and highly shrinkable polyester yarn as weft yarn in a warp double woven fabric, carry out the weaving and then shrink the fabric by 20-30% based on the gray fabric width in the width direction in a processing step. Thereby, the objective woven fabric, having soft hand, excellent in the light shielding properties and suitable as curtain fabrics, etc., is readily produced at low cost.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel method for producing a woven fabric used for a curtain or curtain.

[0002]

BACKGROUND OF THE INVENTION Suppleness is the most important item for curtains.
It is a quality characteristic. Dense curtains for dense or thick dark and dark fabrics
Used as. As a curtain with only dark and dark colors
The image of the
To improve the appearance of the curtain without impairing the light
Has a multi-organization such as a double-duration, a double-latitude and a double-latitude
Bar factor (CF₁ ) I try to raise it. Note that
Cover factor (CF ₁ ) Is calculated by the following equation (1)
It

[0003]

[Equation 1] CF ₁ : cover factor Dw: warp density (books / inch) Df: weft density (books / inch) Nw: warp cotton count Nf: weft cotton count However, in order to obtain a desired light-shielding property, It is not enough to use the method of making multiple tissues. There is also a method of increasing the cover factor (CF ₁ ) with this multiple structure and applying a coating to obtain a desired light-shielding property. However, in this method, the coating deteriorates the texture and the desired texture as a curtain is obtained. Moreover, the desired light-shielding property cannot be obtained because of the remarkable shrinkage property.

[0004]

SUMMARY OF THE INVENTION The present invention is intended to solve such problems, and an object thereof is to provide a method for imparting excellent light-shielding property and texture to a woven fabric.

[0005]

In order to solve this problem, the present invention uses a cellulosic fiber as a warp thread appearing on the front surface and the back surface in a warp double woven fabric, and uses a high shrinkage polyester thread as a weft thread. The gist is to weave the fabric, and then shrink the fabric width in the width direction by 20% to 30% in the working process. Hereinafter, the present invention will be described in detail.

High-shrinkage polyester yarn is terephthalic acid /
100% polyester composed of a copolyester fiber having a dicarboxylic acid component having an isophthalic acid molar ratio of 96/4 to 88/12 and an ethylene glycol component and having a heat shrinkage (So) of 25% to 70% It is a spun yarn and has a twist coefficient in the range of K = 2.8-3.4 and a heat shrinkage ratio (Po) of 20% -40.
% High shrinkage, copolyester spun yarn. If the molar ratio of terephthalic acid exceeds 96, the heat shrinkage (So) will be less than 25%, and if the molar ratio of terephthalic acid is less than 88, fusion will occur in the copolyester fiber portion during heat shrinkage, It becomes a hard spun yarn.

When the twist coefficient is less than 2.8, the strength of the fiber bundle as a spun yarn cannot be maintained, and when it exceeds 3.4, twisting torque is generated and a snare phenomenon occurs in the spun yarn. It is inconvenient to handle.

[0008] The warp double woven fabric is a fabric composed of a double warp and a single weft, and is a woven fabric in which a short shrinkage polyester yarn is used as the weft so that the weft is made to appear on the front surface and the back surface. is there.

[0009] Cellulosic short fibers are fibers made of cotton, hemp, rayon, etc., and also include composite materials such as mixed spinning, mixed twisting, and mixed weaving. In the case of this composite material, it is desirable that the cellulosic short fibers are contained in an amount of 50% or more.

By the way, if the shrinkage ratio of the woven fabric is less than 20% with respect to the width of the weaving cloth, the woven fabric cannot sufficiently satisfy the light-shielding property, and if the shrinkage ratio of the woven fabric exceeds 30% with respect to the width of the weaving cloth And the drapeability required as a curtain is impaired.

The manufacturing method uses the conventional cover factor (C
Since it is difficult to express sufficiently in F ₁ ), a woven fabric that can satisfy the cover factor (CF ₂ ) relational expression shown in the following expression (2) is preferable.

[0012]

[Equation 2] CF ₂ : Cover factor Dw ₁ : Front warp density (pieces / inch) Df ₁ : Weft density (pieces / inch) Nw ₁ : Front warp cotton count Nf ₁ : Weft cotton count Dw ₂ : Back warp density (Books / inch) Nw ₂ : Cotton count of back warp (books / inch) n: 1 / number of repeats of basic design The warp double woven fabric obtained next is subjected to dyeing finishing. In that case, first, the desizing is performed by the usual method, and then the refined bleaching is performed. In this step, the most preferable method is a winch batch process. However, a continuous method may also be used.

[0013]

According to the method of the present invention, in the warp double woven fabric, the cellulosic fiber is used as the warp that appears on the front surface and the back surface, and the weft yarn is woven using the high shrinkage polyester yarn.
It is essential to shrink the width in the width direction by 20% to 30% in the processing process. It has become clear that with such a constitution, it is possible to easily and stably manufacture a fabric having an excellent light-shielding property and a soft texture.

[0014]

EXAMPLES Examples of the method of the present invention will be described below, but the present invention is not limited thereto.

First, a combed cotton 40 ^S spun by a normal cotton spinning process is used for both front and back warps, and a high shrinkage polyester yarn 40 ^S is used as a weft yarn. As shown in Fig. 1, weave a warp double woven fabric so that the back warp ratio is 1: 1 and perform desizing, scouring and bleaching with a jet dyeing machine, and then at 130 ° C for 60 minutes by the usual method. The dyeing of black color was performed without shrinkage. In the figure, 1 is a front structure and 2 is a back structure.

The warp double woven fabrics of the three examples produced by the above method were measured for the degree of light shielding according to the JIS L 1055-A method, and as a result, as shown in Table 1, have very excellent light shielding properties, and It becomes a soft curtain fabric with a texture. In addition, the JIS
The light-shielding performance according to the L 1055-A method refers to the performance of blocking incident light, and the light-shielding performance of the curtain is evaluated by measuring the illuminance and displayed as a light-shielding rate (%).

[0017]

[Table 1]

[0018]

As described above, according to the present invention, it is possible to inexpensively and easily manufacture a woven fabric having a softness which is unprecedented and having an excellent light-shielding property and suitable as a curtain fabric.

[Brief description of drawings]

FIG. 1 is a structural diagram of a fabric according to an embodiment of the present invention.

[Explanation of symbols]

 1 Front organization 2 Back organization

Claims (1)

[Claims] 1. In a warp double woven fabric, a cellulosic fiber is used as a warp that appears on the front and back surfaces, and a high shrinkage polyester yarn is used as a weft, and then woven, and then 20% of the width of the raw fabric in the processing step. -30% shrinking in the width direction, a method for producing a woven fabric having a light-shielding property.