JPS5982441A - Polyester long fiber yarn used knitted 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 The present invention relates to a silk fabric using polyester long fiber yarn that can be set with low temperature and moist heat, is hard to cause uneven dyeing, has a good texture, and has excellent aesthetics.

In recent years, in the clothing field, knitted fabrics with excellent functionality such as jeans fabrics are in demand, while knitted fabrics with excellent texture and aesthetics such as jeans fabrics and corduroy fabrics are in demand. ``A thing is strongly demanded. This tendency is becoming stronger as the individualization of solutions progresses.

However, polyester M k'& textile products, fly
Polyethylene terephthalate fiber products have a variety of excellent properties such as abrasion resistance and easy care properties, so they hold the highest position as general-purpose fibers, but on the other hand, they lack texture and aesthetics. For example, in fields where a high level of fashionability is required, it has lost its place to acetate fibers and acrylic fibers.

As a result of extensive research, the present inventors have developed a knitted fabric using polyester long fiber yarn that maintains the excellent performance originally possessed by polyester fibers, has excellent aesthetics, and can be set with low temperature and moist heat. They obtained textiles.

That is, in the present invention, part or all of the knitted fabric contains 1.5 to 2.5 mol% of the 5-sodium sulfoisophthalic component and 6.0 to 12.0 mol% of the isophthalic acid component based on the total acid components. (ethylene derephthalate) obtained by copolymerizing
A knitted fabric using long fiber yarns of polyester copolyester, in which a part or all of the long fiber yarns of ethylene terephthalate copolyester are temporarily woven at a temperature of 130°C to 180°C. This is a knitted fabric using polyester long fiber yarn made of twisted processed yarn, and the knitted fabric using polyester long fiber yarn has been subjected to a raising treatment.

Here, regarding the polyester containing IJumsulfoisoheptalic acid and isophthalic acid components as copolymerized components used in the present invention, Japanese Patent Publication No. 34-10497
It is already publicly known from publications such as No.

However, the fibers obtained from such compositions are
The low melting point makes post-treatment difficult and extremely difficult to use, and therefore nothing is known about textiles obtained from this fiber.

The polyester used in the present invention has a total of 15 to 15% of all floor components.
It is necessary to use polyethylene terephthalate copolymerized with 2.5 mol% of 5-sodium sulfoisophthalic acid component and 6.0 to 12.0 mol% of isophthalate/' acid component, but C or A method in which lower alkyl esters of terephthalic acid, isophthalic acid, and 5-sodium sulfoisophthalic acid are transesterified with ethylene glycol in the presence of a suitable catalyst, and then polycondensed, or dehydrated esterification of each acid with ethylene glycol. There are no particular restrictions on the method of polycondensation. There are no particular restrictions on the catalyst, but it is preferable to use an alkali metal compound as a stabilizer. 5-S) If the IJumsulfoisophthalic acid component is less than 1.5 mol % based on the total acid components, a sufficiently vivid color cannot be obtained in the dyeing process. Also,
Even if the amount exceeds 2.5 mol%, performance such as dyeability will not improve, and on the contrary, the melt viscosity of the polymer will increase, leading to a decrease in operability such as spinning and drawing, and a decrease in the quality of the obtained fibers. Therefore, the 5-sodium sulfoisophthal m component is
It is necessary to adjust the amount to 1.5 to 2.5 mol % based on the total acid components. Furthermore, if the isophthalic acid component is less than 6.0 mol% based on the total acid components, low-temperature and moist heat setting properties cannot be obtained even if the stretching and false-twisting processing conditions described below are used.
Moreover, if the isophthalic acid component exceeds 12.0 mol %, the moist heat setting property improves slightly, but the operability deteriorates so much that it is no longer practical. It is necessary to make it 0 mol%.

Furthermore, even if various additives are used, such as titanium oxide added as a matting agent, there is no particular change in the effects of the present invention. The polyester is spun by a conventional method, but there are no particular restrictions on the spinning conditions or the spinning method.

There are various stretching methods, such as a method in which the yarn is stretched in a state directly connected to the spinning process, and a method in which the yarn is wound up as an undrawn yarn and then subjected to a -1 stretching step, and any of these methods may be used. In addition, although stretching is carried out in one or several stages, at the final stage of stretching or after completion of stretching, the temperature is
Preferably heat set at ~170°C. for example,
In the case of a hot roller or hot plate type stretching/twisting machine, the hot plate temperature which is the final transformation process of stretching R], 20
℃~170℃. Unlike the case where, for example, an aliphatic dicarboxylic acid component is used instead of the isophthalic acid component, the composition exhibits a specific change in crystallinity, and exhibits a specific thread quality and texture depending on the stretching conditions and setting conditions. Is possible. The obtained long fibers are preferably dyed, and the 7 earth feed ratio is preferably about 1 to 4% on the overfeed side. The long fiber yarn or processed yarn is dyed in the form of yarn, if necessary. The dyeing temperature is 1 for disperse dyes.
10°C to 130°C, 105°C to 12°C for basic dyes
0°C is desirable. Further, the long fiber yarn is subjected to strong twisting if necessary. Processing conditions are not particularly limited. These fibers can be circular knitted, warped silk, yokozuna knitted, or IP! ! Used for weaving process. Further, the long fiber yarn may be knitted or woven alone, or may be mixed with the processed yarn.

As for the mixing method, polyester long fiber yarn and processed yarn may be inter-knitted or inter-woven. In this case, it is desirable that the polyester fiber yarn of the present invention accounts for 20% or more of the total. When weaving, the basis weight, texture, density, etc. are determined by conventional methods depending on the purpose. The knitted fabric using undyed fibers is then dyed. The dyeing conditions are the same as the yarn dyeing conditions described above. In particular, when basic dyes are used, extremely vivid color tones that cannot be obtained with conventional polyester fibers can be obtained. The obtained i-fabric is usually heat treated in this state to stabilize its dimensions. Furthermore, heat treatment may be performed after cutting and sewing. The heat treatment temperature at this time can be sufficiently set at a low temperature, which was considered impossible with conventional polyester, and can also be set at low temperature and moist heat. There are no particular restrictions on the setting method, but it is usually carried out by steam injection or in water production under normal pressure. It is desirable that the steam be heated to 100° C. or higher before injection.

Next, a napping treatment is performed before or after the dimensional stabilization treatment. There are no particular restrictions on the raising method such as emery raising or needle cloth raising, the degree of raising, the length of raising, etc. The resulting raised knitted fabric maintains the unique texture obtained by modifying the polyester by finishing at low humidity, resulting in an extremely soft raised product.

As mentioned above, using the polyester long fiber yarn of the present invention a
In addition to having excellent texture and aesthetics, the woven fabric can be dimensionally stabilized at temperatures that are 77J lower than expected with knitted fabrics obtained from conventional polyethylene terephthalate fiber yarns, and is also brushed. If it is, you will get a very soft brushed product. Additionally, because the dyeing process is slow, uneven dyeing does not occur.

EXAMPLES Hereinafter, the present invention will be explained in more detail with reference to Examples, but the present invention is not limited thereto.

Example 1 Polyethylene terephthalate copolymerized with 11 mol% of isophthalic acid component and 1.6 mol% of 5-sodium sulfoisophthalic acid component was spun at a temperature of 285°C, with a hot roller temperature of 75°C and a hot plate temperature of 140°C. The yarn was drawn 3.6 times at a temperature of 0.degree. C. to obtain a drawn yarn having a single yarn denier of 3 deniers. This yarn was false twisted at a temperature of 150°C and
(The dyed yarn was dyed with 300 denier and a vest was made after Yokozuna.
I put it in the stretched state and set it with steam from a steam iron at 100°C for 10 seconds. Even with the frame removed, it was set perfectly and the mesh was perfectly aligned.

The shrinkage rate after washing five times in accordance with JIS-L-0844 was 3% or less, which caused no practical problems.

In addition, the texture before and after washing was good without any change.

Comparative Example A vest was produced in the same manner as in Example 1, using polyethylene terephthalate instead of the copolymerized polyethylene terephthalate of Example IJ1.

The vest was not dyed sufficiently, the stitches were not completely dyed, the silk unevenness remained, and the waist was hard even at 11 degrees, so it was a poor product and was rated 8 stars.

Patent applicant: Toyobo Co., Ltd.

Claims (3)

[Claims] (1) Part or all of the knitted fabric has 1.5% of the total acid component.
Knitting and weaving using long fiber yarns of ethylene terephthalate-1 copolymerized polyester made by copolymerizing ~2.5 mol% of 5-sodium sulfoisophthalic acid component and 6.0 to 12.0 mol% of isophthale component. Polyester length characterized by being? , knitted fabric using fiber yarn. (2) A textured yarn in which part or all of the long fiber yarn of ethylene terephthalate copolyester polyester is false twisted at a temperature of 130°C to 180°C]
A knitted fabric using polyester long fiber yarn as described in Section 1. (3) Claim 1 in which the silk fabric is brushed
A knitted fabric using polyester long fiber yarn according to item 1 or 2.