JPS58109642A - Anti-pilling bulky spun 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 anti-pilling bulky spun yarn, and more specifically, a novel acrylic anti-pilling yarn having excellent anti-pilling properties, unique texture and appearance such as bulkiness, resilience and gloss. Regarding bulky spun yarn.

Conventionally, as acrylic spun yarn with bulky properties,
BACKGROUND ART Blended yarns of regular acrylic fibers and high shrinkage acrylic fibers, blended yarns of acrylic composite fibers and regular acrylic fibers, and blended yarns of composite fibers, regular fibers, and high shrinkage fibers are known.

Among these, blended yarns made of composite fibers produce bulky yarns with uniform bulge and elasticity due to the three-dimensional shrinkage characteristic of composite fibers, compared to high shrinkage fiber blended yarns.
The fuzz on the surface of the product has the disadvantage of being easily tangled and pilling due to its crimped form.

In addition, blended yarns of composite fibers and high-shrinkage fibers can provide bulky yarns with excellent dimensional stability, uniformity, and repulsion, but on the other hand, they have the disadvantage that pilling is more likely to occur because the composite fibers are more visible on the yarn and product surface. Ta.

In order to prevent the occurrence of pilling, we use products with a reduced blending ratio of composite fibers, as seen in Japanese Patent Publication No. 15147/1983, or in which composite fibers are placed in the center of the spun yarn.
Increasing the shrinkage of conjugate fibers has been proposed, but in either case satisfactory anti-pilling properties have not been achieved because the conjugate fibers appear on the surface of the product due to bulking. In addition, we previously proposed a blended yarn of anti-pilling acrylonitrile composite fiber (hereinafter abbreviated as anti-pilling composite acrylic fiber) and anti-pilling Gyura acrylic fiber, but we are also considering blending it with shrinkable fiber. As a result, the anti-pilling properties were insufficient due to the shrinkage rate and physical properties of the shrinkable fibers.

In addition, although good anti-pilling properties can be obtained, there are problems in which flies and thread breakage occur during the spinning process, resulting in a significant decrease in spinnability, and poor strength in terms of product durability and practicality. Ta.

Therefore, the present invention eliminates these drawbacks and provides anti-pilling properties.

The purpose is to obtain a composite fiber blended bulky spun yarn with good spinnability, bulkiness, durability, and dimensional stability.It is an anti-pilling spun yarn consisting of anti-pilling composite acrylic fiber and shrinkable fiber. The present invention was completed after intensive study on the conditions to satisfy both the properties of yarn and spinnability at the same time.

That is, in the present invention, the single fiber tensile strength is 25 to 3.5-1, the tensile elongation is 15 to 35 g, and the knot strength is 0.8 to 2.5 g.
/d of building-resistant composite acrylic fiber and hot water shrinkage rate of 7.
The single fiber tensile strength after hot water treatment is 2.0 to 5.
5 cd, tensile elongation 10-35%.

An anti-pilling bulky span characterized by being blended with anti-pilling shrinkable acrylonitrile fibers (hereinafter abbreviated as anti-pilling shrinkable acrylic fibers) having a knot strength of 0.8 to 2.5 g/d. It's a thread.

To explain in more detail, the pill-resistant composite acrylic fiber used in the present invention has a single fiber tensile strength of 25 to 3.5 g/d.
, the tensile elongation is usually 15 to 35 inches, preferably 15
~60%, and the nodule strength is usually 0.8 to 2.3
It is important to have a characteristic of g/d, preferably 0.8 to 2.0 Vd.

In addition, the anti-pilling shrinkage acryl fiber is treated in a free condition in a continuous tree at 100°C for 10 minutes, and after air drying, the single fiber tensile strength is 2.0 to 3.5 Vd, and the tensile elongation is usually 10.
-35 inches, preferably 1.0-30 inches, and the knot strength is usually 0.8-2.3 g/d, preferably 0.
It is important to have properties of 8 to 2.0-, with a strength of 3.5 g/d or more and an elongation of 35% or more after hot water treatment.
If the knot strength is 2.3 g/d or more, good anti-building properties cannot be obtained. On the other hand, when the strength is 2.01d or less, the elongation is 10cm or less, and the knot strength is 0.8- or less, good anti-build properties are obtained, but on the other hand, the fiber properties before heat treatment are significantly reduced, resulting in poor spinning properties. Not only is this method difficult to obtain, but it is also insufficient in terms of durability of reading.

Next, in the present invention, the mixing ratio of the anti-pilling shrinkage acrylic fiber is required to be 10 to 50% by weight from the viewpoint of obtaining good anti-pilling properties, texture, and product shape stability, and is 10% or less. However, sufficient shape stability, bulkiness, and repulsion were not obtained with 5.
If it is 0% or more, uniform swelling of the bulky yarn cannot be obtained.

In addition, it has good anti-build properties and excellent bulkiness and resilience.

In order to obtain the texture, the anti-pilling composite acrylic fiber needs to have a weight ratio of 20 to 60% in the spun yarn, and if it is less than 20 inches, sufficient bulkiness cannot be obtained, and if it is more than 60%, the composite fiber will shrink. becomes strong and the yarn becomes coarse and hard, making it impossible to obtain a good texture.

Furthermore, the shrinkage rate of the anti-pilling shrinkable acrylic fiber must be 7 to 60 inches. If it is less than 7%, the bulkiness tends to be insufficient and sufficient dimensional stability cannot be obtained. Moreover, if it exceeds 30%, the bulkiness is undesirable because the yarn has poor appearance and lacks resilience.

Here, the contraction rate is the length I under a load of 0.1 g/d! o(
A fiber bundle of 50 cm) was treated in a free state in hot water at 100°C for 20 minutes, dehydrated, air-dried, and then returned to a concentration of 0.1 g/d.
It was calculated using the following formula from the length l under load.

/ −2 Shrinkage rate--x 100 (%) I! .

Furthermore, by using a blended yarn with pill-resistant natural fibers such as gula fiber, wool, or cotton as a third component fiber, it is possible to obtain an anti-pilling spun yarn with even better uniformity and good resilience. . Pill-resistant Gyula fibers and natural fibers are not particularly limited, and include acrylic and polyester fibers.

Any polyamide anti-pill fiber may be used. Examples of natural fibers include wool, animal hair fibers, linen, cotton, and silk.

The anti-pilling composite acrylic fiber used in the present invention is not limited to the production method, and those obtained by various conventionally known methods can be used as appropriate. , 6゜0 moles or more of acrylic ester or methacrylic ester,
A DMSO solution of a copolymer on the high shrinkage side copolymerized with 90 moles or less, and a low shrinkage side copolymer copolymerized with 1.0 mole or more and 3.0 mole or less of the above acrylonitrile and the above ester. It is manufactured using two types of polymer spinning stock solutions of DMSO solution.

In this case, the high shrinkage side polymer contains 0.2 mole or more of the sulfone group-containing vinyl monomer and 0.4 mole or less, and the low shrinkage side polymer contains 0.5 mole or more and 1 mole or more of the sulfone group-containing vinyl monomer. .0
It is preferable to contain each in a molar amount or less.

Also, acrylic ester or methacrylic acid ester is copolymerized with these two types of polymers.

From the viewpoint of shrinkage development performance, a content difference of 4.0 moles or more and 6.5 moles or less is required.

The above two types of polymer spinning stock solutions are DMS-spun into a side-pie-side type or an eccentric sheath-core type using an ordinary composite spinneret.
The fiber tow was discharged into an O-water wet spinning bath and coagulated, then stretched 4 to 6 times, washed with water and dried, and the DMSO was removed by washing with water.

Send it to a dryer heated to 100-200℃ and dry for 3-7
% shrinkage while drying to a moisture content of 3% or less.

In this way, compared to the manufacturing conditions for conventional composite fibers that do not have anti-pilling properties, we minimized the compositional difference between the two types of polymers, adopted a low stretching ratio, and increased the temperature of the coagulation bath. By reducing the concentration of the DMSO solution and minimizing the rate of gradual shrinkage during the process, anti-pilling composite acrylic fibers having targeted properties can be obtained.

The anti-build shrink acrylic fiber used in the present invention can be obtained by various conventionally known methods within the range that satisfies the shrinkage rate and fiber properties of the present invention. % or more and copolymerized with 2.0 moles or more and 6.0 moles or less of acrylic acid ester or methacrylate ester
Manufactured using solution spinning dope. In this case, the sulfone group-containing vinyl monomer is contained in the dipolymer in an amount of 0.2 mole or more.

It is preferable to contain 1.0 mole or less. This polymer stock solution was discharged into a DMSO-water wet spinning bath using a conventional spinneret and coagulated, and then stretched 6 to 6 times.

Remove DMSO by washing with water and dry the fiber tow.

Shrink 3 to 7 inches in a dryer at 100 to 200°C and dry to a moisture content of 3% or less.

In this way, compared to the manufacturing conditions for conventional fibers that do not have anti-build properties, we adopted a lower draw ratio, a higher temperature of the coagulation bath, and a higher concentration of the DMS○ solution to reduce the relaxation and shrinkage rate during the process. A pill-resistant shrink acrylic fiber having targeted properties can be obtained by drawing and cutting the minimized tow using known dry heat drawing (for example, turbo stapler) and wet heat drawing methods.

As described above, the present invention uses a mixture of anti-pilling composite acrylic fiber and anti-pilling shrinkable acrylic fiber, which improves anti-pilling properties, bulkiness, and appearance.

Snow yarn with extremely excellent texture and product shape stability can be obtained.

The present invention will be specifically explained below using examples.

Example 1 First, a pill-resistant composite acrylic fiber was produced as follows.

Polymerization was carried out in DMEfO using azobisisobutyronitrile as a polymerization initiator. Copolymer spinning stock solution (I) containing 91.31 mol% acrylonitrile, 8.6 mol% methyl acrylate, and 039 mol% sodium allylsulfonate.
A copolymer spinning dope (II) consisting of 9Z00 mol of acrylonitrile, 2.0 mol of methyl acrylate, and 1.00 mol % of sodium allylsulfonate was added to the final fiber in a side-by-side manner through a composite spinneret. Composite spinning was carried out in a DMS○50 water solution at 40°C so that the denier was about 6d.

This was then stretched 4.5 times in a DMS030% solution at 98°C, washed with water, dried in a hot air dryer at 160°C with 5% relaxation, applied with a finishing oil, crimped, and stretched at 60°C. After drying for about 50 minutes, it was cut to 102 m/m.

The properties of the obtained fibers are as shown in Table 1 below.

Table 1 Next, anti-build shrink acrylic fibers were produced as follows.

A solution of a terpolymer of acrylonitrile/methyl acrylate/sodium allylsulfonate was prepared by solution polymerization in DMSO using azobisisobutyronitrile as a polymerization catalyst.

The copolymerization rates are two types of solutions: 20 mol% and 4.0 mol% of methyl acrylate, and 1.2 mol% and 0.4 mol% of sodium allylsulfonate.

These two kinds of polymer stock solutions were wet-spun in a 50% DMSO aqueous solution so that the final single yarn denier was 6d, and after stretching 6 times, the shrinkage rate was set to 7% at 170°C for 4 minutes. Dry. The resulting dried tow was then relaxed in pressurized steam at 120°C for 20 minutes.

Six types of slivers were produced by changing the stretching ratio of the obtained tow using a turbo stapler. The fiber properties of the sliver single fibers before and after heat treatment are shown in Table 2 below.

Table 2 Table 6 Using the anti-build composite acrylic fibers and anti-pilling shrinkage acrylic fibers obtained as described above, the fibers were fabricated to a metric count of 2/36 (number of twists A spun yarn with a length of 18,077 m and a number of first twists of 36,077 m was obtained. After dyeing this spun yarn using a bulk jet dyeing machine, a sweater fabric with a rubber structure is created using a 7-gauge manual flat knitting machine to obtain pile and bulk properties.

The texture and shape stability of the product were evaluated. The results are shown in Table 4.

The anti-pilling property evaluation was carried out for 5 hours using a method using an ICI type tester (J Kos L1076A method).

As the pill-resistant Gyula fiber, anti-build 1 trellon staple having the fiber properties shown in Table 6 was used. As the wool, commercially available merino wool (64'B) was used.

As is clear from Table 4, experiment numbers 2-5゜9-10
and 15 to 19 were spun yarns within the scope of the present invention, so they had good spinnability, bulkiness, and anti-pilling properties.

It had excellent morphological stability and product durability. On the other hand, in Experiment No. 1, the anti-pilling properties were poor because the physical properties of the anti-pilling shrinkage fibers were higher than the range of the present invention. Furthermore, in Experiment No. 6, the physical properties were low, so the spinnability and durability were poor, and a good product could not be obtained. In addition, in Experiment Nos. 7°8.11 to 14, the mixing ratio was outside the range of the present invention, and the bulkiness and shape stability were poor, resulting in poor products.

Patent Applicant Toshi Co., Ltd. Company Procedures Supplement 1
- Written (method) % formula % 1.Indication of the incident 1982 I L'tli'l 1110 No. 1213
') 1 g2, Name of the invention: Anti-Bilky Spun Thread 3, Person making the amendment: 4, Date of amendment order: 1937, 25th F+ <
Shipping 8) 5. Number of inventions increased due to amendment None 6.
Specification to be amended Yamanaka “Name of invention column”

Claims (3)

[Claims] (1) A building-resistant acrylonitrile composite fiber having a single fiber strength of 2.5 to 3.5 g/d, a tensile elongation of 15 to 35%, and a knot strength of 0.8 to 2.3176, and hot water The shrinkage rate is 7-30% and the single fiber strength after hot water treatment is 20-3.
5 g/d, tensile elongation 10-65%, knot strength 0
．． Pill-resistant bulky spun yarn blended with pill-resistant acrylonitrile-based contractile fiber having a weight of 8 to 2.5 g/d. (2) Pile-building acrylonitrile shrinkable fiber is 10~
50% by weight and anti-build acrylonitrile composite fibers
The pile-building bulky spun yarn according to claim 1, which is a blend of 0 to 60% by weight. (3) anti-pilling non-shrink synthetic fiber and/or as the third component;
The anti-pilling bulky spun yarn according to claim 1, wherein the yarn is blended with natural fibers including cotton and/or wool.