JPS6021939A - Production of combined stretch yarn - 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 drawn yarn made from a plurality of undrawn polyester yarns having different elongations. A drawn yarn T-side yarn made from a high-elongation, low-orientation undrawn yarn, and the side yarn has a multicolor heathered pattern in which thick portions are formed in the length direction of the yarn. A method for producing a plied drawn yarn that can obtain a special appearance and texture such as a vertical or square pattern, and that can provide a fabric with excellent toughness and special bulkiness different from that of a single thick and thin yarn. I can buy things.

Many studies have been made on thick and thin yarns, and not only drawn yarns but also textured yarns have already been studied. However, the manufacturing method for forming thick and thin threads itself is a non-drawing method that is not suitable for the nature of the yarn, so in order to form clearly thick and thin threads, the thread physical properties are poor, and if the thread physical properties are given importance, clear Thick and thin or heathered patterns are difficult to appear, and the expression of fabrics such as soft treatments such as alkali treatment and woven fabrics is poor.

The inventors of the present invention have conducted various studies on how to make use of the characteristics of this thick and thin thread in fabrics, and as a result, we have found that by combining it with an appropriate core yarn that bears toughness as a thick and thin thread T1 King, we have found that It has a wide range of applications, such as changing the length P and ratio of the yarn, changing the pattern, softening it by alkali treatment, dissolving the undrawn thick part, and creating fuzz and squash patterns. Also, shrinkage due to simultaneous drawing of undrawn yarns with different physical properties. It was discovered that due to the difference, special bulkiness and multicolor dyeing properties can be added.

That is, in the present invention, a polyester undrawn yarn (elongation value L) with a small elongation at break (E13) and a polyester undrawn yarn (elongation value DEA) with a small elongation at break are used as a combined yarn -C, and the elongation difference between them is An undrawn thread with a DE131 straightness of 30% or more and a DE131 straightness of 180% or more is glass transition, DEA+100 fish body lower, stretching magnification, xt, 05x0.60 or more DEB+100, Xi, 05x0. The present invention relates to a method for producing a drawn polyester composite yarn, which is characterized in that it has a drawn polyester yarn of 0.00 when stretched at 70 or less.

Here, the elongation at break (DEB) on the high elongation undrawn yarn side is 18
If it is less than 0%, the yarn will not be clearly thick and thin, but will have a heathered pattern and strong alkali resistance, resulting in a novel and short fabric. Also,
If the difference in elongation between the two is less than 30%, it will not be possible to compensate for the drawbacks of thick and thin yarn using only a single yarn, and the resulting fabric will have few characteristics.

Regarding the stretching temperature, since the undrawn yarns with different physical properties are combined and stretched, the resulting fabric can be a polychromatic patterned yarn, but by stretching at a temperature below the secondary dislocation point, Furthermore, it is possible to obtain multi-colored fabrics, as well as fluffing and childish fabrics by alkali treatment. The appropriate draw ratio varies depending on the combination of undrawn yarns, but it must be DEA + 100 x 1. o 60% or more of 5, 00 It is desirable to have as high a draw ratio as possible, and by doing so, the toughness r as a core yarn can be exhibited. On the other hand, in order to obtain a variety of textures such as heathered and thin 4 patterns 2 and fluffing and scarcity due to alkali treatment, the draw ratio of high elongation undrawn yarn is almost the maximum, and EB-1- It is necessary to set the drawing ratio to 70% or less of the value of -100"'υ5, and the lower the drawing ratio, the more the undrawn portion of the side yarn increases.

In the present invention, various heathered patterns can be obtained by combining low elongation undrawn yarn and high elongation undrawn yarn and changing the stretching ratio, and new fabrics can be obtained.

In addition, in the case of a plurality of undrawn optically spliced yarns with different physical properties and drawn yarns, the yarns tend to separate into parts, and loops and fuzz are likely to occur, so it is not necessary to perform entanglement treatment before or after drawing. This is desirable, as it not only improves unwinding performance and process passability.

In particular, when the entanglement treatment is performed before stretching, a regular heathered pattern or loops can be obtained, resulting in a fabric with a special appearance and texture.

The present invention will be explained below with reference to Examples and Comparative Examples, and the units in Table 1 are as follows: spinning speed m/min, fineness d/f, elongation chi, stretching temperature ℃ 1 strength r/d. .

Examples 1 to 7 and Comparative Examples 1 to 3 Examples 1 to 4 had a large difference in elongation and were drawn at a temperature below the secondary dislocation point, and only Example 4 had a slightly lower draw ratio. Because of this, the strength was low, but the yarn had a large iU% and was suitable for diversification such as bulkiness, fluffing due to patterning or alkali treatment, and squash.

On the other hand, in Comparative Example 1, the stretching temperature was set at 85° C. and stretching was carried out at a temperature higher than the secondary dislocation point.

According to this, bulkiness and patterns due to the difference in physical properties of the undrawn yarn appeared, but as the low U% indicates, there was almost no change in thickness and the yarn lacked expression.

Comparative Example 2 was drawn at a low stretching ratio that deviated from the lower limit, and the ratio of thick parts was increased, and there were many dark colored parts and fuzzed parts due to alkali treatment, but the strength was 1. is low, and the process passability before alkali treatment is also poor. Furthermore, Comparative Example 3 was a combination in which the difference in elongation between the undrawn yarns in one doubling was as small as 21%, and the fabric lacked expression in terms of loftiness, pattern, and alkali treatment.

Example 5 uses an undrawn yarn with a relatively low elongation of 185% on the side of the high elongation undrawn yarn that should form a thick and thin layer, and has a characteristic style in all items. Although it was possible to obtain some results, it was close to the limit.

Claims (1)

[Claims] 1) Undrawn polyester yarn with a large elongation at break (elongation value 1
jEB) and small polyester undrawn yarn (elongation value DEA
), and the undrawn yarns with a difference in elongation of 30% or more and a DEB value of 180- or more were prepared under glass transition fish DEA+100 and at a stretching ratio of □. , X 1.05 X O, 60 or more, L) EB+lO 1oo Alternatively, a method for producing a drawn polyester yarn, which is characterized in that it is subsequently subjected to an entanglement treatment.