JPS62289646A - Production of polyester fabric - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] 3. Detailed description of the invention <Industrial application field> The present invention relates to a polyester fabric weaving method.

More specifically, the present invention relates to a method for manufacturing a warp and weft fabric using high speed spun polyester fibers having a low urinary contraction rate.

<Conventional technology> In recent years, the synthetic fiber industry has begun to reduce costs by innovating production processes and using high-speed spinning. That is, in the manufacturing process of polyester fiber yarn, especially in the spinning process,
For example, production by a so-called high-speed spinning take-off method (spin-tick-up spinning method) using a high take-off speed exceeding 7000 ra/min is being considered.

The polyester fiber obtained by such a high-speed spinning draw method has a microstructure that is significantly different from that of the conventional low-speed spinning/drawing yarn produced by the two-step general-purpose low-speed spinning process and drawing process, so it is not suitable for practical use. It is known to have particularly useful properties with respect to the above performance. That is,
Polyester fiber produced by the high-speed spinning draw method has good dyeability (and has a faster alkali weight loss rate than general-purpose drawn yarn).

However, contrary to the above-mentioned advantages, polyester fibers obtained by high-speed spinning and drawing have characteristics of low heat shrinkability and low thermal stress. Therefore, when weaving and dyeing fabrics using high-speed spun polyester fiber yarns by designing the warp and weft densities to the same standards as those for general-purpose yarns, the shrinkage of warp and weft yarns during the dyeing process is small, so the wind of the processed fabric is reduced. If so,
The texture is paper-like and has no waist, which detracts from the texture.

There is no known method for solving these problems in fabrics made from polyester fiber yarns produced by the take-off spinning method at a spinning speed of 7,000 cm or more for 1 minute.

<Problems to be Solved by the Invention> The purpose of the present invention is to create a voluminous and firm texture using polyester fibers produced by a high-speed spinning draw method, particularly polyester fibers with low heat shrinkage and thermal stress. It is an object of the present invention to provide a method for weaving a fabric having the following properties.

Means for Solving the Problems> The present invention provides a method for producing textiles by spinning at 7000 nu/min or more and using polyester fiber threads having a boiling water shrinkage rate of 2.0 to 3.0% for the warp and weft. , the warp density and weft density (0/inch) of the gray fabric are 1 higher than that of the processed fabric.
This is a polyester fiber yarn weaving method characterized by weaving gray fabric with a density change rate of ~2% down and a weft density of 1.2~2.4% down.

The present inventors focused on the fact that the boiling water shrinkage rate of polyester fiber yarn produced by high-speed spinning and drawing method is extremely low compared to general-purpose drawn yarn, and found that because it is a yarn with a low boiling water shrinkage rate, the width increase rate in the processing process is extremely low. They found that a low level of carbon dioxide affects the texture and physical properties of textiles.

Gray fabrics (taffeta) of various standards with different warp and weft densities
As a result of weaving and dyeing each fabric and evaluating the texture of the fabric, we found that there is a certain relationship between fabrics with good texture and the warp and weft densities of the gray fabric. In other words, the warp density and weft density of gray fabric are 1 to 2% higher than that of processed fabric specified in textile design.
By weaving a gray cloth with a down/weft density change rate of 1.2 to 2.4% down and processing the gray cloth, a processed fabric with a good texture can be obtained.

On the other hand, the relationship between the greige and processing density of textiles made of general-purpose force-drawn yarn is that the density of the greige is lower than that of the processed fabric, the warp density increases by 4% due to yarn shrinkage in the processing process, and the weft density increases by 3.5.
% increases and processing increases to the density specified in the textile design.

The polyester fiber yarn used in the present invention has a boiling water shrinkage rate of 2.0 to 3.0%, and preferably a peak value of dry heat shrinkage stress of 0.1 g/d or more.

In the present invention, the warp yarns are sized to maintain weavability, while the weft yarns are spun yarns that are used without any processing.

In the weaving method of the present invention, a gray fabric is woven at the rate of change in warp density and weft density specified in the present invention.

The single yarn denier of the warp and weft is 1 to obtain a good texture.
~2.5d is preferred.

Further, in order to improve process performance, it is preferable from the viewpoint of weaving textiles that the number of entanglements by air jet is 5 to 10 m. 1
Sizing a yarn having a number of entanglements of 0 threads/m or more is not preferable because the interlace points are fixed and the quality of the fabric deteriorates.

<Example> The yarn used in this example was spun at a spinning speed of 7000 m/min and 8
It is a polyester fiber yarn consisting of 5 to 10 entangled yarns at a rate of 000 m/min, and has the physical properties shown in Table 1.

Warp threads for water jet loom weaving were prepared by applying glue to the warp threads under the sizing conditions shown in Table 2. next,
These sized yarns were used as warp threads to weave gray fabric (taffeta) using a water jet loom (Model LW-41) manufactured by Nissan ■ according to the experimental standards shown in Table 4. Table 3 shows the weaving conditions.

Gray cloth (taffeta) woven at the experimental level shown in Table 3 and Table 4 below was dyed and processed, and the warp and weft density change rate and texture of the processed fabric were evaluated.

The results are shown in Table 4. The dyeing processing conditions are shown in Table 5.

The texture evaluation shown in Table 5 and Table 4 is based on a comprehensive evaluation of the softness of the fabric, the feel of the fabric, the stiffness of the fabric, etc., and is based on the following graded evaluation.

◎ mark: very good, O mark: good,
△ mark: Defective (possibly a problem with the product) As is clear from the evaluation results in Table 4, the weft and warp density of the gray fabric must be designed and woven within the scope of the present invention. According to
A woven fabric of good quality with good texture and firmness was obtained.

<Effects of the Invention> According to the present invention, even when polyester fiber yarn is spun at high speed and has a low spring water shrinkage rate and dry heat shrinkage stress, it is possible to obtain a fabric that has a good texture and has a firm feel. It will be done.

Claims (2)

[Claims] (1) Spinning at 7000 m/min or more, boiling water shrinkage rate 2.0
When making woven fabrics using ~3.0% polyester fiber yarn for the warp and weft, the warp density and weft density (threads/inches) of the gray fabric are 1 to 2% higher than those of the processed fabric.
A method for weaving polyester fabric characterized by weaving gray fabric with down and a weft density change rate of 1.2 to 2.4% down. (2) Polyester fiber yarn has a single yarn denier of 1 to 2.5
A method for weaving a polyester fabric according to claim 1, wherein the number of entanglements is 5 to 10/m.