JPS59228043A - Production of hard twisted 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] [Technical Field of the Invention] The present invention relates to a method for producing a strong linen knitted fabric made of polyester fibers, and more specifically, the characteristics of the knitted fabric that prevents yarn unevenness, and its strong linen yarn. This article relates to a strong linen knitted fabric that takes full advantage of its characteristics.

[Prior art and its problems]

Texture of knitted fabrics containing polyester fibers is created by applying mechanical shock in warm water of a texturing device such as a Tally Wara Shine or a continuous relaxer to release the torque of the high-strength cotton yarn, resulting in a 2-strength fiber knitted fabric. It is usual to obtain . However, polyester fibers with uneven threads generally have a water escape shrinkage rate of 50% or more. It is well known that the standing ability is very poor. This is because the water escape shrinkage rate of the yarn is greater than 50%, which causes unevenness in the twisting of the inner and outer layers of the yarn cylinder during twisting after applying a 2-strong yarn.

Unsatisfactory results could not be obtained due to improper graining.

[Object of the present invention]

The present invention aims to improve such conventional drawbacks, and uses polyester fiber yarns that have unevenness.

When a yarn with a water escape shrinkage rate of 20% or less is subjected to strong tension, twist prevention, knitting and weaving, and graining, the graining properties and grain quality are significantly improved.

[Configuration of the present invention]

The structure of the present invention is ``a polyester fiber yarn with yarn unevenness, a yarn with a submerged shrinkage rate of 20% or less, and a twist coefficient x = 16D.
A strong yarn of Oo or higher is applied, and the twist is stopped at a temperature of 4 [1 to 75℃, after which a knitted fabric is formed, and the grain is made into a strong yarn at a temperature between the twisting temperature and the twisting temperature of 15℃ or less. ``A method for producing a strong linen knitted fabric, which is characterized by sufficiently dissolving the linen.''

The polyester fiber of the present invention may be made into a yarn having a submerged shrinkage rate of 2Q% or more and having a yarn unevenness of 2Q% or less by heat treatment.

The polyester constituting the present invention contains 80 or more moles of ethylene terephthalate units.

Copolymerization components include 1, oxyacids such as adipic acid and senibenzoic acid, and diethylene glycol;
One or more types of glycols such as propylene glycol, neopentyl glycol, pentaerythritol, and polyethylene glycol monomethyl ether can be used. The polyester constituting the yarn is produced by spinning an intermediately oriented undrawn yarn with a birefringence of 20 x 10-' or higher, drawing it at a temperature higher than the secondary dislocation point, and creating a fiber with an uneven distribution of diameters in the axial direction. The yarn has a Wooster unevenness U% of 06 to 90% and a submerged shrinkage rate of 20% or less, or has a distribution of diameter unevenness in the fiber axis direction and a U% of 06 to 90% and a submerged shrinkage rate of 20% or less. 20% or more of the yarn is treated with heat at 90 to 220°C to obtain a yarn with a submerged shrinkage ratio of 20 or less. Such uneven yarn can be obtained by, for example, thick and thin yarn (a yarn having stretched portions and unstretched portions randomly in the length direction of the yarn).

[Actions and effects of the present invention]

The effects of the present invention will be explained using figures and the like.

The present invention will be explained using figures in comparison with the conventional method.

Figure 1 shows the setting temperature and the twist value after setting (suspending a load of 0.01 Jd in the center of an 80 cIn strong cotton thread, putting both ends together in the center and twisting, and the number of twists at that length). The relationship is 1 in Figure 1, which is 75 for normal yarn (conventional drawn yarn).
It is made of D-rot 6f polyester yarn coated with 2500 t/m of strong yarn. usually.

The bili group of strong Nene yarn that can be woven (when used for weft yarn) is 65 or less, so the polyester strong Nene yarn is set at 80 to 90°C, and a in Figure 99 indicates the bili group. Become.

2 in the figure is a 75D-36f polyester yarn with a yarn unevenness U% of 5.8% and a diving shrinkage rate of 50%.
It is set with a strong coating of t/m. This seven so) = liTh case is 50 in the set of Biri group over 40℃
It is quite small and there is no problem in weaving. However, due to the high shrinkage rate of the yarn.

Shrinkage unevenness on the inner and outer layers of the printer when setting,
This causes unevenness and adversely affects the quality of the fabric.

The yarn of the present invention shown in the middle of the figure is a yarn with a birefringence of 30 x 10-' drawn at 110°C to produce a yarn with a u% of 32% and a submergence shrinkage of 15 inches, and a strong yarn of 2500 t/m. It is set after applying. After setting the yarn at 45° C., the yarn of the present invention has a Vili group of 60 or less, which is approximately the same level as a in 1 in the figure, and there is no problem in handling. The shrinkage unevenness and setting unevenness of the inner and outer layers of the cylinder during setting are smaller than that of ordinary yarn, and the quality of the fabric is very good.

In addition, heat treatment after setting these strong fibers (with a load of 0.01φ suspended in the center of the strong fiber yarn after setting)
Bring both ends together in the center and twist.

Furthermore, this sample is placed in hot water and twisted.

(Measuring the number of twists) will be explained using FIG. 2. The normal yarn 1 in the figure has a heat treatment temperature of 180 at a set temperature of 80° C., and a strong linen fabric with excellent texture can be obtained with this heat treatment temperature.

In the figure, since the yarn is a 2\i thick-and-thin yarn and has a submerged shrinkage rate of 50, the heat treatment group does not reach 150 even at a set temperature of 40 to 50C. For this reason, it was not possible to obtain a satisfactory strong linen fabric.

The yarn of the present invention shown in 3 in the figure has 1 thread at a setting temperature of 50 to 70°C.
It is possible to obtain the same degree of heat treatment frizz as that of woven yarn.

The third reason why the non-aqueous shrinkage rate of the yarn of the present invention is 20% or less is preferable.
This will be explained with reference to FIG. Figure 6 shows the relationship between the submersion shrinkage rate of the yarn that causes unevenness and the degree of frizz after setting (60°C x 40 minutes). There is no problem in handling during weaving.

Figure 4 shows the submergence shrinkage rate and set (6
The figure shows the relationship between the degree of brittleness after heat treatment (0° C. x 40 minutes), and it is possible to obtain a strong linen fabric with satisfactory texture in the shaded area of 150 or more. That is, 1) since the partial water shrinkage rate of the present invention is 20% or less, it is possible to obtain a heat treatment friability of 150 or more, which is indicated by diagonal lines; In order to obtain a grained strong linen fabric, as mentioned above, a strong linen yarn with a non-aqueous shrinkage rate of 20% or less and yarn unevenness is used.
By setting at 75° C., a strong linen fabric with a satisfactory texture can be obtained.

Furthermore, it is preferable that the strong linen fabric be embossed.

The temperature increase rate may be slowed from near the set temperature, or the temperature increase may be stopped at about 10° C. higher than the cent temperature at which decomposition occurs.

The strong cotton knitted fabric adapted to the present invention has a twist coefficient of 16.
The present invention can be applied to anything, such as fabrics using 0.000% strong cotton yarn for both the warp and weft, 100% strong cotton yarn, and inter-knitted fabrics with other yarns.

Example 1 An intermediately oriented undrawn yarn was prepared by spinning polyethylene terephthalate at 6000 m/min.
47. It was drawn at a drawing temperature of 85°C, and then subjected to a relaxing heat treatment of 5 parts at 160°C to obtain a yarn with a submerged shrinkage rate of 16 parts and a yarn unevenness U% of 3.8%. 250 for this thread
0 t/m' strong coating applied.

Set at 60℃ and the degree of frizz is 50. Heat treatment degree 1
Obtained a strength of 80. Create a flat crepe using this strong cotton thread, and use a washer to create a texture.

The dyed crepe had good texture and excellent drapability.

Example 2 The intermediately oriented undrawn yarn of Example 1 was drawn at a draw ratio of 152 degrees and a drawing temperature of 1 []O<0>C, resulting in a non-aqueous shrinkage rate of 12 inches.

A yarn with yarn unevenness u% of 19% was obtained. Example 1
I did a strong set under the same conditions as the one above, and the strength was 46.
Heat treatment room 441! Obtained a strong weapon with a hit level of 175.

Create a satin crepe using this strong cotton thread, and
Yatte grain 1'1. After that, dyeing and finishing were done.
) L・-bu is in good condition and has excellent drapability.
It's 47 years ago.

Example 1 Example 1 (7) 2500 t/m of strong tension was applied to the yarn obtained by stretching with a non-aqueous shrinkage rate of 60, and the yarn was heated to 11 degrees at 6D°C. ,Brittleness 15. A strong yarn with a heat treatment strength of 60 was obtained. Using this strong cotton thread, flat Craig k f
Completed7. After finishing the dyeing process and applying pressure to finish the dyeing process, a crepe appeared on the inner and outer layers of the cotton yarn cylinder, and no grain was observed, resulting in a voile-like crepe.

Comparative Example 2 The yarn obtained in Comparative Example 1 was coated with 2,500 t/m of strong yarn and set at 40°C, resulting in a frizz of 50. A strong Nene having a heat treatment strength of 118 was obtained. The fabric and dyeing finishing process were carried out in the same manner as in Comparative Example 1, but although the unevenness in the inner and outer layers of the cotton yarn cylinder was eliminated, a crepe with a satisfactory grain quality could not be obtained.

[Brief explanation of the drawing]

In Figure 1, 2500 t/m of strong steel was applied. Figure 2 shows the relationship between the setting temperature and the heat treatment strength of the /ζ strong yarn used in Figure 1. FIG. 6 shows the relationship between the shrinkage rate and the tightening of the yarn, and FIG. 4 shows the relationship between the shrinkage rate of the yarn used in FIG. 6 and the degree of heat treatment tightening. Special Request: Applicant Higashi Stock Company Office Room 1 IJI21 Do 2nd Kaya-?-Q

Claims (2)

[Claims] (1) With polyester fiber yarn with uneven yarn. The twist coefficient is -16,000 for yarns with a water escape shrinkage rate of 20% or less.
A strong yarn of 1-L is applied, the twist is fixed at a temperature of 40 to 75°C, and then a knitted fabric is formed. Twisting the grain 1] -2 temperature to stop twisting temperature plus 15℃
A method for producing a strong linen knitted fabric, characterized in that a strong linen yarn is decomposed at the following temperature. (2) Polyester fiber yarn with uneven yarn. A method for producing a strong linen knitted fabric according to claim (1), characterized in that the yarn having a water escape shrinkage factor of 20 or more is heat-treated to produce a yarn having a shrinkage factor of 20% or less. θre