JPS60461B2 - A woven product made from a blend of wool and organic conductive fibers with excellent antistatic properties. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to wool knitted and woven products that exhibit excellent antistatic properties in a low-temperature atmosphere and exhibit substantially the same quality and performance as 100% wool knitted and woven products.

In today's living environment where air-conditioning equipment has become extremely popular, various types of static electricity can be caused not only by synthetic fiber products but also by natural fiber or cellulose fiber products, which are said to have relatively few static electricity hazards. These problems have become a problem, and strict safety management is required to prevent the generation of static electricity, especially in chemical and petroleum-related factories, hospitals, etc. that handle flammable materials.

Among natural fibers, wool has been used in large quantities as a luxury product for carpets, upholstery, interior decoration, and bedding due to its excellent fiber properties, such as bulkiness and dyeability. Under humidity conditions of 30% RH or less, problems with static electricity occur significantly, and there is a strong demand for prevention of static electricity in wool fiber products.

Post-treatment of wool or wool fiber products with various antistatic agents is a simple means of preventing static electricity in wool fiber products, but this antistatic treatment not only impairs the excellent product properties of wool, but also It has the major disadvantage that it has poor antistatic properties, loses its antistatic performance during cleaning, etc., and impairs its texture and appearance.

On the other hand, attempts have been made to add antistatic properties to textile products by mixing small amounts of conductive fibers such as metal fibers, metal-plated fibers, or carbon fibers, but these conductive fibers are not compatible with general-purpose textile fibers. The fiber performance is different from that of the above, and there have been no examples of its application to wool products.

This is because the blending properties of these conductive fibers with wool are poor, so special spinning means must be employed, and the manufacturing cost of the conductive fibers is also high, resulting in a significant increase in product cost. Moreover, this is thought to be due to the disadvantage that the feel, feel, etc. of wool products are often impaired due to the difference in fiber physical properties between wool and the conductive fiber. Furthermore, as is well known, wool immediately after harvesting is heavily contaminated with impurities and must be washed during the washing process, but washed wool has antistatic properties and smoothness. , high-order processing properties such as east-centering properties are more or less lost, so oil treatment (oiling) is usually performed.

However, in this oiling, there are very few oils that can satisfy all of the above-mentioned high-order processing properties for wool, especially both controllability and smoothness, and this is a major constraint in terms of quality performance and cost of wool fiber products. In other words, the oil agent that imparts antistatic properties is a little sticky and tends to impede the smoothness of fibers, and is unavoidably applied during spinning, resulting in a unique slimy feel to textile products, especially wool products. I don't like it.

If the antistatic oil applied to the wool is not durable, the oil will fall off during the dyeing process of the wool product, and although the texture of the wool product will be good, the wool product will no longer be affected. Since it does not have antistatic properties, dust and dirt may adhere to it.
This may cause static electricity problems such as electric shock.

On the other hand, when a highly durable antistatic agent is added to a wool product, not only does the texture of the wool become significantly affected, but the antistatic properties gradually decrease as the product is worn and washed repeatedly.

The same is true when applying an antistatic agent through post-processing, and it has been impossible with conventional techniques to satisfy both antistatic properties and the excellent feel unique to wool.

The present inventors have previously proposed a synthetic fiber consisting of a polyether polymer blended with carbon black and a fiber-forming polymer, particularly an acrylonitrile polymer, as an organic fiber comparable to conductive fibers. The present invention was discovered through extensive research into anti-static properties of wool striped and woven products using organic conductive fibers.

That is, the object of the present invention is to produce a wool stripe with excellent antistatic properties that exhibits the same performance as a textile product made essentially only of wool by uniformly blending a small amount of conductive fibers using a conventional spinning method. We provide woven products.

Another purpose is to be able to select and use oils without substantially considering antistatic properties when oiling washed wool, and to improve wool edges and fabrics that take advantage of the fiber characteristics of wool. Our goal is to provide products.
The features of the present invention are as described in the claims, in particular, as the conductive fibers, organic conductive fibers that can easily impart crimp performance through homogeneous blending to wool are used, and the conductive fibers are of the same grade as the wool. This can be achieved by mixing approximately 0.05 to 3% by weight of organic conductive fibers having a weave within a specific range.

The organic conductive fibers constituting the dominant wool knitted and woven product of the present invention can be crimped using a known winding device, such as a crimping machine with a stuffing box. A bran winding property with a shrinkage ratio of 5 to 20% and a weave of 1 to 10 deniers and a twill that is about one-third to twice the average weave of wool. It is necessary to have

Here, the organic conductive fiber refers to an organic conductive mixed yarn fiber or an organic conductive composite paper yarn fiber made of a conductive polymer containing carbon black and a fiber-forming polymer.

Such conductive fibers cannot be produced industrially with good reproducibility, at least not by inorganic fibers such as metal fibers or carbon fibers, but also by metal-plated fibers or fibers coated with carbon black-containing resin. A mixed polymer fiber described in JP-A-52-103525 consisting of a polyether polymer blended with carbon black and a fiber-forming polymer, or the mixed polymer is used as one component of the polymer components constituting the fiber. This can be advantageously achieved by using fibers such as composite grade yarn fibers whose electrical resistivity at 200 mm and 30% R mark is less than 1 pi.

However, in order to mix the conductive mixed fibers or conductive composite spun fibers into the wool knitted/woven products of the present invention, the weave should be approximately one-third to twice the average weave of wool.
Preferably 0.4-1. Needle sound 'ko needs to be controlled,
When the grade of the conductive fiber is less than about one-third, the conductive fiber tends to bunch up in the spinning process of blending the conductive fiber and wool.

On the other hand, if the weave exceeds twice the average weave of wool, uniform blending becomes difficult and the antistatic properties of wool fiber products tend to deteriorate.

The mixing ratio of the conductive fiber to wool is approximately 0.05.
It is necessary that the amount is in the range of ~3% by weight, preferably 0.1 to 1.5%; if the mixing ratio exceeds 3%, the antistatic effect will be saturated, so there is no need to increase the amount any further.
Further, if it is less than 0.05%, it is not preferable because, although it depends on the electrical resistivity of the conductive fiber, the conductivity may not be sufficient or it may not be possible to uniformly mix it into wool using a general-purpose mixing method. In particular, in order to enable uniform blending with wool, have excellent performance, and improve productivity, in addition to the weave ratio of the conductive fiber to the average weave of the wool, the number of windings of the conductive fiber should be 2 to 8. It is important to select a material having a curling characteristic of crest/cm, a curling rate of 5 to 20%, and a fineness of 1 to 1M. Note that the above crimp ratio is a value determined by the JIS method.

In addition, the wool is not particularly limited as long as it has been treated with an oil after removing impurities and dirt during the washing process, but preferably does not contain antistatic agents, especially cationic and anionic surfactants. Wool treated with oil is best. That is, if a durable antistatic agent that impairs the hand of the wool is applied, the hand of the final wool product will be impaired.

Therefore, when applying an antistatic oil, it is better to use one that easily comes off during dyeing or other processes, so that the feel of the wool product will be better. That is, using a Soxhlet extractor, a mixture of benzene and ethanol (2:1) was used.
After repeated reflux under boiling for hours, the electrical resistivity of the wool from which the oil has fallen off is 1 and 00 at 2000 and 30% RH.
・C or higher is preferable.

Preferably, the organic conductive fibers are mixed by adding them to washed wool and mixing them uniformly during carding, or by doubling them with organic conductive fibers or a sliver mainly composed of organic conductive fibers.

It is also preferable to blend other fiber materials to improve the durability of wool and improve its feel.

For example, a nylon blend significantly improves abrasion resistance, and a polyester blend improves shape stability and retention. These auxiliary fibers are normally used in a range of 0 to 27%. The conductive fiber-mixed wool spun yarn obtained in this way can be knitted and woven into various structures using various known paper spinning and weaving techniques, but the pile fabric obtained from the mixed spun yarn is particularly useful as a carpet or furniture fabric. It has the same texture and appearance as 100% wool.
Furthermore, it exhibits permanent antistatic properties, particularly outstanding antistatic properties even in a low temperature atmosphere of 30% RH or less. 1 Furthermore, the antistatic wool knitted/woven product of the present invention uses various antistatic agents, especially antistatic agents having cationic or anionic ionizable groups, in the oil treatment after hair washing, as described above. Because of the stickiness caused by the antistatic agent,
This has the advantage that wool's unique waist, texture, etc. are not impaired, and the characteristics of wool can be brought out to a greater extent, especially in fields such as formal wear where dust and dirt are easily noticeable.

Example 1 A block polyether ester of polyethylene adipate and polyethylene glycol obtained by polymerization by a conventional method was dissolved in dimethyl sulfoxide, and acrylonitrile (AN) was graft-polymerized using ammonium persulfate.

Furnace black #40 (manufactured by Mitsubishi Chemical Corporation) was added to this solution.
After adding and mixing, acrylonitrile/methyl acrylate/sodium methallylsulfonate (93.7/6.0/0
．． 3 mol %) of an acrylic polymer in dimethyl sulfoxide.

The yarn was graded using a conventional method, and the material was wrapped with a stuffing box, followed by drying and cutting. The carbon black content of the obtained carbon array conductive fiber was 7M%,
Average single yarn denier red, cut length 76, strength 2.4/
d, elongation 30.2%, Ken shrinkage number 4 peaks/reduction, Ken shrinkage rate 11
%, and the electrical specific resistance was 3.7×1 pi○·arc. On the other hand, the average twill degree is 4. 2/4 with pillow wool twill using mother's merino wool
8 yarns are obtained.

After creating a master slab consisting of 50% wool and 50% carbon-aligned organic conductive fibers, the wool slabber and doubling draft were repeated in a gill process to obtain a top. Furthermore, by doubling in the prebottling process, the organic conductive fibers are added to 0.00%.
A braided yarn having a uniform blend of 5% was obtained.

It was made into a 2/48 grade yarn by ring weaving.

A 2/2 tissue serge (fabric weight 280/m) was woven by a conventional method and then dyed.

The results are shown in Table 1, confirming the excellent effects of the product of the present invention. Table 1 ◎: No ash adhesion ○: Almost no ash adhesion ×: Much ash adhesion Example 2 A carbon array organic atomization fiber was produced in the same manner as in Example 1.

The carbon black content of the fiber is 7wt%, the average single yarn denier is 2.9, the cut length is 76 skins, and the strength is 2.7 mm/d.
, elongation 31.0%, Ken contraction number 5 mountains/enemy, Ken command rate 10%
, the electrical specific resistance was 55×1 pi○. On the other hand, after washing Merino wool with an average weave of 4.3, as shown in Table 2, ■ 100% spinning of wool without antistatic agent;
■ 100% spinning of wool to which an antistatic agent has been added, ■ Blended spinning of 99.5% by weight of wool to which no antistatic agent has been added and 0.5% by weight of the above conductive fibers, and ■ Wool 99 to which an antistatic agent has been added. 0.5% by weight of the conductive fiber and 0.5% by weight of the above conductive fiber were mixed and spun.

The amount of antistatic agent applied to wool is as follows:
The adhesion treatment was carried out so that the amount was within the range of 0.3 to 0.5% by weight based on the weight of wool.

100% wool is spun to a count of 2/2 using normal rare wool spinning.
The organic conductive fiber blended yarn was mixed in the same manner as in Example 1 to obtain a spun yarn with a count of 2/48.

For each level, a 2/2-tissue serge (weighing 280 mm/m) was woven in a conventional manner, and then dyed. The antistatic properties and texture of these surges were investigated before and after washing. The results are shown in Table 2.

By blending the product of the present invention, a wool product that can be spun without using an antistatic agent and has excellent antistatic properties and a unique wool texture was obtained.

Table 2 a): Brit. Patent 788,079 (195
7) b): USP. 3,213,053 (1965)◎
: Extremely good ○ : Good △ : Slightly poor × : Poor

Claims (1)

[Claims] 1 Knitted or woven products mainly made of wool containing organic conductive fibers with a fineness of 1 to 10 deniers and a crimp number of 2 to 10.
8 threads/cm and a crimp rate within the range of 5 to 20%, and a fineness of about one-third to twice the average fineness of wool, and an electrical specific resistance at 20 ° C. and 30% RH. is 10^
It has excellent antistatic properties and is composed of a spun yarn mainly made of wool mixed with approximately 0.05 to 3% by weight of organic conductive mixed spun fibers or organic conductive composite spun fibers having a resistance of 8 Ω cm or less. Knitted and woven products made from a blend of wool and organic conductive fibers.