JPS6017133A - Production of processed yarn having feather - 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 is characterized in that one yarn is a high-speed spun undrawn yarn made of polyethylene terephthalate, and the other yarn is a low-speed spun yarn made of copolymerized polyethylene terephthalate modified with a sulfonate. It relates to false twisting and entanglement processing of both yarns using yarns containing undrawn yarns, and more specifically, the yarn length difference and entanglement caused by simultaneous stretching and false twisting of two types of yarns. The invention relates to a false twisted yarn that has a spun-like texture developed from the fuzz generated when the side yarns are cut during processing, and has a fuzz that exhibits heterochromatic properties when dyed due to the inclusion of modified polyester filaments. .

Previously, undrawn yarns with different physical properties were simultaneously stretched and false-twisted as structured yarns to develop textured yarns with excellent bulkiness, and in order to directly obtain a spun-like texture, a rubbing body was used to twist the yarns into a fuzz chamber. Some methods have been used, such as the use of traditional methods, but these methods require special equipment, and these conventional methods often lack specificity in appearance and texture.

The present inventors have arrived at the present invention as a result of various studies on methods for manufacturing yarns that provide novel appearance and texture. That is, a high-speed spun undrawn polyethylene terephthalate yarn (A) is used as the core yarn, and a polyethylene terephthalate yarn modified with sulfone city salt is used as the low-speed spun undrawn yarn (B) to be the side yarn. After piling the yarn, it is drawn and simultaneously false-twisted to give the structured yarn a bulky or linen-like texture due to adhesion. If (
The present invention relates to a processed yarn having latent heterochromism, which has been subjected to a bundling treatment to give a spunwriter texture by fluffing the side yarns. The present invention will be specifically explained below.

First, the high-speed spun undrawn polyethylene terephthalate yarn (A) that is to be the core yarn must have a breaking elongation of 300% or less, and if it exceeds 300 inches, the toughness as a core yarn is insufficient. If you increase the stretching ratio to obtain toughness, which is difficult to obtain, the side thread B? There is less occurrence of J-wear and yarn length differences, and less fuzz is generated during entanglement processing.

- 10,000, The low-speed spun undrawn sulfonate copolymerized polyethylene terephthalate yarn (B), which is the side yarn, must have an elongation at break of 250% or more;
If it is less than 1, it becomes difficult to obtain yarn length differences and adhesion, and the occurrence of fuzz during entanglement treatment is also reduced. Furthermore, it is necessary that the difference in elongation at break between the undrawn yarns (A) and (B) is 40 inches or more; if it is less than 40%, the yarn length difference will be small and the bulkiness will be poor, and the side yarn This results in a very high stretching ratio, improving toughness, and reducing adhesion and fluffing. The criticality of the present invention will be clarified by the following experimental examples.

Next, to explain the structure of the side yarn, the number of latent heterochromatic modified polyethylene terephthalate yarns contained in the side yarn needs to be 1/4 or more of the entire side yarn (B) system.

Here, when the drop is reduced to 1/4, the heterochromic effect is reduced and the occurrence of fuzz is reduced.

However, if the entire system (B) is the modified polyethylene terephthalate yarn, the number of modified polyethylene terephthalate yarns will be 50% in combination with 15 yarns, but the S yarn will be used as the side yarn by the yarn length difference. Because it tends to have a covering structure, heterochromia tends to be extremely excessive, and fluff tends to occur frequently, so (B) the mixing ratio of modified polyethylene terephthalate yarn in the light is 1.
A value of about 1/4 to 3/4 is desirable.

In the present invention, there is no need to adopt any special conditions for the false twisting of both yarns. Next, it is desirable that the number of entanglement ridges in the entanglement treatment to be performed is 20 or more per meter, and in order to obtain this entanglement property, 2. Air pressure of OKy/crA or higher is required. And the air pressure is 2,01<p/~ end,
When it is 1j.-, the entanglement property is poor, the effect of improving the unwinding property is small, and the occurrence of fluff is also small. This criticality is also clearly extended by the following experimental results.

As described above, the present invention combines a high-speed spun unmodified polyester undrawn yarn and a low-speed spun modified polynisdel undrawn yarn into daughter-spun 1
By performing false twisting and subsequent entanglement treatment, it is possible to obtain latent tetrachroism, bulkiness, spun-like appearance and wind, and also improve convergence, unwinding properties and process passability. The processed yarn can be obtained rationally.'i1. Ru.

The following implementation i′: +1 and comparison! The present invention will be explained by overnight comparison.The yarn (A) of the fast spinning 1111 is made of polyethylene terephthalate, and the light (B) on the sluggish fit indicator side is made of 7 mol of Na salt of sulfoisophthalic acid. The blended modified polyethylene terephthalate (However, only Comparative Example 1 has both yarns and I/C polyethylene terephthalate), and the remainder of the mixed fibers in (B) light is polyethylene terephthalate as in (A) yarn. be. In addition, the units in Table 1 are spinning speed in m/min, elongation at break in chi, fiber fineness in d/f, number of false twists in turns/m, air pressure in "?/ad, and number of entanglements in pieces/m.

Examples 1 to 6 and Comparative Examples 1 to 4 These manufacturing conditions and the results of the processed yarns obtained thereby are summarized in Table 1.

Examples 1 to 3I- This is an example of the present invention in which undrawn yarns with a difference in elongation of about 80% are combined, and the blending ratio of sulfonate modified yarns as low speed spun undrawn yarns is 11th order 100%. , 50
%, 25%.

In each case, the properties of the processed yarns obtained change depending on the drawing ratio, heating temperature, fluid (air) pressure, etc., but as shown in Table 1, the trends can be clearly understood from the results under the same conditions. .

The adhesiveness of the processed yarn obtained was as strong as that of Example 1;
As a result, fuzz is frequently generated after the entanglement process. but,
All of them had high bulkiness due to the difference in thread thickness, and had good unwinding properties despite a large amount of fuzz.

Comparative Example 1 uses normal low-speed spun undrawn yarn made of polyethylene terephthalate without mixed fibers of modified polymers, and although some bulkiness is obtained due to the difference in yarn length, it has low adhesion and very little fluffing. there were.

Example 4 is an example of the present invention using a combination of undrawn yarns with an even greater difference in elongation than Examples 1 to 3, and the drawing ratio is very low for the low speed spun undrawn yarns that will be the side yarns. Because of this, it has strong adhesion properties and generates a lot of fuzz, making it a processed yarn that can be used for fabrics with special textures.

Comparative Example 2 uses a low-speed spun undrawn yarn with an elongation of 225%, and even if it is drawn at a slightly low draw ratio,
The occurrence of fuzz is reduced.

In Examples 1 and 5 and Comparative Example 3, the air pressure during the entanglement process was changed, but these are marginal examples in which the number of entanglements decreases and the unraveling property and fuzz generation decrease.

Comparative Example 4 is an example using one combination of undrawn yarns with a small difference in elongation, and has a small difference in yarn length, poor bulkiness, and little occurrence of fuzz.

In Example 6, the elongation of the low-speed spun undrawn yarn is relatively low and the elongation difference is relatively small19, but the yarn length difference and fuzz occur moderately, and a certain texture can be obtained. These conditions are close to the limit.

Below margin

Claims (1)

[Claims] (1) Contains high-speed spun undrawn polyethylene terephthalate yarn with a breaking elongation of 300% or less (A) and copolymerized polyethylene terephthalate yarn modified with sulfonate at least 1/4 of the total number of filaments (A) The undrawn yarn (B) spun at a low speed and having an elongation at break of 940% or more and an elongation at break of 250% or more is combined, subjected to simultaneous stretching and false twisting, and then heated at an air pressure of 2. OK9/crA
A method for producing a processed yarn having fluff, which comprises performing an entanglement treatment as described above.