JP2000314055A - Production of double circular knitted fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing a double circular knitted fabric having soft touch with no problems in color fastness to dyeing and excellent in tension and stiffness. SOLUTION: In a double circular knitting machine the knitting is carried out by feeding a multifilament yarn comprising a polytrimethylene terephthalate having <10% shrinkage percentage in hot water to a feeding line which knits by solely using a cylinder needle or a dial needle and a polyester multifilament yarn having >=15% shrinkage percentage in hot water to at least a part of feeding lines which knit or tuck both needles of the cylinder needle and the dial needle and bringing the interknitting percentage of the highly shrinkable polyester multifilament to 20-60%.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a double circular knitted fabric having a soft touch such as nylon and having excellent firmness and firmness and excellent dyeing fastness.

[0002]

2. Description of the Related Art Conventionally, a high-shrink yarn composed of a copolymerized polyester of isophthalic acid and a specific glycol component is mixed with a polyethylene terephthalate yarn, knitted and knitted, followed by dyeing and finishing to shrink the high-shrink yarn to obtain a polyethylene. A method has been used in which a terephthalate yarn is raised on a fabric surface. Nylon, on the other hand, has an excellent soft touch, and attempts have been made to obtain a knitted fabric having a soft touch and excellent firmness and firmness by mixing it with a firm and firm polyethylene terephthalate yarn. The acid dyes and gold-containing dyes having good coloring properties cannot be used to dye polyethylene terephthalate, and the disperse dyes capable of dyeing polyethylene terephthalate cannot be used to dye nylon, resulting in contamination and poor dyeing fastness. Further, when polyethylene terephthalate is usually dyed with a disperse dye, it is necessary to dye at a high temperature of around 130 ° C., but if nylon is dyed at this temperature, the nylon becomes brittle and cannot be used for ordinary applications.

[0003]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned situation, and has a double feel which is soft and has no problem in dyeing fastness and is excellent in firmness and firmness. It is an object to provide a method for manufacturing a knitted fabric.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and is intended for knitting a double circular knitted fabric with a double-sided circular knitting machine having a cylinder needle and a dial needle. A multifilament yarn made of polytrimethylene terephthalate having a hot water shrinkage of less than 10% is supplied to a yarn feeder knitted with only needles,
At least a part of the yarn feeder knitted or tacked with both the cylinder needle and the dial needle has a hot water shrinkage of 1
A double circular knitted fabric characterized in that a high shrinkage polyester multifilament yarn of 5% or more is supplied and knitted, and a knitting ratio of the high shrinkage polyester multifilament yarn is 20% or more and 60% or less of the knitted fabric. Of the present invention.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, when knitting a double circular knitted fabric with a double-sided circular knitting machine having a cylinder needle and a dial needle, heat is supplied to a yarn feeder knitted with only a cylinder needle or only a dial needle. A polytrimethylene terephthalate multifilament yarn having a water shrinkage of less than 10% is supplied and knitted.

[0006] The polytrimethylene terephthalate multifilament yarn is a multifilament yarn composed of polytrimethylene terephthalate containing 1,3-propanediol and terephthalic acid as constituents. A multifilament consisting of a copolymer obtained by copolymerizing at least one component selected from ethylene glycol, diethylene glycol, 1,4-butanediol, isophthalic acid, 5-sulfoisophthalic acid, bisphenol A, etc. within a range that does not change its properties. It may be a thread.

[0007] The polytrimethylene terephthalate multifilament yarn used in the present invention may or may not be crimped. If it is crimped, a bulky, soft, firm and firm texture can be obtained. On the other hand, if there is no crimp, the surface is smooth and soft and firm,
A firm texture is obtained, and any of them can be preferably used for clothing.

In the present invention, a high shrinkage polyester multifilament yarn having a hot water shrinkage of 15% or more is fed to at least a part of a yarn feeder knitted or tacked by both a cylinder needle and a dial needle. The knitting rate of the knitting is set to 20% or more and 60% or less of the knitted fabric.

The high shrinkage polyester multifilament yarn used in the present invention is a polyester multifilament yarn capable of exhibiting a high shrinkage of 15% or more by hot water treatment. For example, the total of ethylene glycol terephthalic acid is 85 mol% or more. Using a copolymerized polyester containing 15% by mole or less of isophthalic acid or the like, and more preferably a copolymer obtained by containing a specific range of 2,2bis {4- (2-hydroxyethoxy) phenyl} propane. It can be obtained by spinning a polymerized polyester.

This high-shrink yarn polyester multifilament having a hot water shrinkage of 15% or more serves to connect the front surface and the back surface, and the knitted fabric is reduced in the thickness direction by shortening the joint portion by finishing. Tightened, dense knitted fabric provides excellent firmness and firmness.

[0011] When a structure in which the high shrinkage yarn is knitted by a cylinder needle and a dial needle is employed to constitute a part of the front and back surfaces of the knitted fabric, the hot water shrinkage is less than 10%. The part knitted with the polytrimethylene terephthalate multifilament yarn can be raised by finishing.

According to the present invention, by using two types of multifilament yarns having a difference in shrinkage of 5% or more for a specific knitting structure, a soft touch and excellent firmness and stiffness can be obtained. It becomes important. That is, it is necessary to knit the knitting ratio of the high shrinkage polyester so that the knitting ratio is 20% or more and 60% or less of the knitted fabric. If the knitting ratio is less than 20%, the effect of shrinkage of the high shrinkage polyester multifilament yarn cannot be sufficiently exhibited, and does not contribute to the improvement of firmness and stiffness of the knitted fabric. On the other hand, if it exceeds 60%, the high shrinkage polyester will constitute the majority of the knitted fabric, and not only will the polytrimethylene terephthalate filament not have a sufficient hand feel, but the knitted fabric will shrink too much, and Hardness is not preferred.

[0013] The double circular knitted fabric of the present invention is a double-sided circular knitting machine having a cylinder needle and a dial needle. A multifilament yarn consisting of trimethylene terephthalate is fed and knitted or tacked with both needles of a cylinder and a dial. At least a part of the yarn feeder is a high shrinkage polyester multifilament yarn having a hot water shrinkage of 15% or more. And a knitted fabric having the knitting structure shown in FIGS. 1 and 2 as an example of such a knitted fabric. FIG.
, A polytrimethylene terephthalate filament yarn is supplied to the yarn feeders F3, F4, F7, and F8 knitted with only the cylinder needle or only the dial needle, and at least one of the yarn feeders F1, F2, F5, and F6 is fed. The double circular knitted fabric of the present invention can be obtained by feeding and knitting a polytrimethylene terephthalate filament yarn to a yarn feeder which feeds a high shrinkage polyester multifilament yarn and does not feed a high shrinkage yarn. it can.

Since the double circular knitted fabric of the present invention is composed of a polytrimethylene terephthalate filament yarn and a high shrinkage polyester yarn, it can be dyed with a disperse dye and can be dyed at high temperature and pressure. For this reason, conventionally, a knitted fabric of nylon and polyester having a soft touch cannot be dyed at a high temperature and a high pressure due to the presence of nylon, and it has been difficult to commercialize the knitted fabric. A cross-knitted fabric of polytrimethylene terephthalate and a copolymerized polyester having a good quality can be obtained, and high-temperature and high-pressure dyeing can be performed, and a dyed knitted fabric having excellent texture and excellent color fastness can be obtained.

[0015]

According to the method for producing a double circular knitted fabric of the present invention, a high shrinkage polyester is used for a part of both knit structures for joining the front surface and the back surface of the double circular knitted fabric. Since the polytrimethylene terephthalate multifilament yarn can be raised from the knitted fabric and the high shrinkage yarn is knitted at an appropriate ratio, it is excellent in firmness and stiffness as a fabric, and at the same time it has been difficult to use as an outer garment. In place of nylon, a knitted fabric excellent in dyeing fastness capable of expressing a soft touch like nylon can be obtained.

[0016]

Next, the present invention will be described in detail with reference to examples, but the present invention is not limited thereto.

Example 1 A highly oriented undrawn yarn 115d / 24f of polytrimethylene terephthalate multifilament was mixed with Mitsubishi Heavy Industries false twisting machine L.
With the S-6 type, false twisting was performed at a spindle rotation speed of 40 × 10 rpm, a draw ratio of 1.548 times, a false twist number of 3600 t / m, a first heater temperature of 170 ° C., and a second heater temperature of 200 ° C. The fineness of the obtained crimped yarn was 74d and the hot water shrinkage was 8.5%. LPJ- manufactured by Fukuhara Seiki Seisakusho Co., Ltd.
Using an H-shaped circular knitting machine, the crimped yarn is knitted only at one side of the yarn feeders F1 and F5 and the cylinder needle and the dial needle, which are knitted with both the cylinder needle and the dial needle in the mock Milano rib structure diagram shown in FIG. Yarns are fed to yarn feeders F3, 4, 7, and 8, and high-shrinkage polyester filament yarn 60d / 24f (hot water shrinkage: 24.5%) is fed into yarn feeders F2 and F6, and knitted at 100 ° C. Through the steps of relaxing scouring, 160 ° C. pre-setting, 130 ° C. high-pressure dyeing, and 160 ° C. final setting, a double circular knitted fabric according to the present invention in which the usage ratio of the high-shrinkage polyester filament yarn was 36.9% was obtained. The obtained double circular knitted fabric had a soft feel like nylon, had excellent firmness and firmness, and had no problem with dyeing fastness. .

Example 2 Using the same circular knitting machine as in Example 1, a drawn yarn of polytrimethylene terephthalate multifilament 100d / 48f
(Hot water shrinkage: 9.6%) is supplied to the yarn feeders F2, 3, 5, and 6 in the knitting structure diagram of the mock low shown in FIG. 2, and the high shrinkage polyester filament yarn 60d /
12f (hot water shrinkage: 28.8%) is fed and knitted,
Dyeing and finishing were performed in the same manner as in Example 1 to obtain a double circular knitted fabric according to the present invention in which the ratio of the high-shrinkage polyester filament yarn was 24.3%. The obtained double circular knitted fabric has a soft touch like nylon, a smooth surface touch and excellent firmness and firmness, and is suitable for outer garments that have no problem with dyeing fastness. Obtained.

[0019]

According to the present invention, it is possible to obtain a circular polyester knitted fabric which has excellent dyeing fastness with a soft touch like nylon, has excellent firmness and firmness, and can be suitably used for outer garments. it can.

[Brief description of the drawings]

FIG. 1 is a knitting structure diagram of a knitted fabric according to an example of the present invention.

FIG. 2 is a knitting structure diagram of a knitted fabric according to an example of the present invention.

Claims (1)

[Claims] When knitting a double circular knitted fabric with a double-sided circular knitting machine having a cylinder needle and a dial needle, hot water shrinkage is less than 10% at a yarn feeder knitted with only a cylinder needle or only a dial needle. A multi-filament yarn consisting of polytrimethylene terephthalate is fed and knitted or tacked with both the cylinder needle and the dial needle. At least a part of the yarn feeder is a high shrink polyester multi-filament with a hot water shrinkage of 15% or more. A method for producing a double circular knitted fabric, characterized in that yarns are fed and knitted, and the knitting ratio of the high shrinkage polyester multifilament yarn is set to 20% or more and 60% or less of the knitted fabric.