JP3188544B2 - Thread - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thread used for a high-speed loom, for example, a jacquard loom, which is rapidly increasing its speed in recent years.

[0002]

2. Description of the Related Art In recent years, looms have generally been rapidly speeding up, but the threading for looms has not been able to cope with the rapid speeding up. Therefore, a thread that can follow a high-speed loom, particularly a high-speed jacquard loom, is desired, and various proposals have been made in order to cope with such a situation. For example, "A thread for jacquard loom, which is formed by braiding an aramid multifilament yarn, a conductive fiber, and a thermoadhesive fiber as a core yarn and a nylon multifilament yarn as a braid in a netting structure," JP-A-90348) or "Thread passing through a coating made of a thin yarn made of a soft metal wire and an aramid-based fiber as a core yarn and a resin mixed with a conductive powder" (Japanese Utility Model Application Laid-Open No. 3-59592). ) Is disclosed. In addition, the use of ceramic fibers, carbon fibers, glass fibers, amorphous fibers, and the like for threading is disclosed (Japanese Utility Model Laid-Open No. 30278/1991). However, it fully satisfies the characteristics required for high-speed loom threading, that is, elongation resistance, especially elongation resistance when wet, oil resistance, electrification resistance, abrasion resistance, bending fatigue resistance, light weight, etc. The fact is that the passing thread has not yet been realized. The present inventors have studied such a problem, found a solution thereof, and have reached the present invention.

[0003]

SUMMARY OF THE INVENTION The object of the present invention is to provide various properties required for high-speed loom threading, namely, elongation resistance, especially elongation resistance when wet, oil resistance, charging resistance, abrasion resistance, and bending fatigue resistance. The purpose of the present invention is to provide a thread that sufficiently satisfies the properties and lightness.

[0004]

The present invention relates to "(Claim 1) wherein the thermal decomposition temperature is 230 DEG C. or more, the single fiber fineness is 0.5 to 20.0 denier, and the polyurethane (A), polyethylene oxide (B), fluorine And a heat-resistant fiber to which a treating agent comprising a system resin (C) and an ethylene urea compound (D) is adhered.

The fiber having a thermal decomposition temperature of 230 ° C. or higher is aramid fiber (for example, Kevlar fiber manufactured by DuPont Co., Ltd., Technora fiber manufactured by Teijin Limited, etc.). Are more preferable), aromatic polyester fibers (for example, Vectran fibers manufactured by Kuraray Co., Ltd.), glass fibers, carbon fibers and the like. Single yarn fineness is 0.
It is 5 to 20.0 denier.

If it is less than 0.5 denier, friction with other objects occurs.
Single yarn breakage is apt to occur during abrasion, and when used under a high load, stress concentration occurs at a specific location and the fiber is cut, so that the original high strength of the fiber cannot be sufficiently exhibited. If the denier exceeds 20.0 denier, the flexibility of the braided material is reduced and the bending fatigue resistance is deteriorated, so that the durability of the thread usually used in the bent state is reduced.

[0007] Next, heat-resistant fibers composed of fibers having a thermal decomposition temperature of 230 ° C. or more and a single-fiber fineness of 0.5 to 20.0 denier are polyurethane (A), polyethylene oxide (B), fluororesin (C), It has been treated with a treating agent comprising an ethylene urea compound (D). Polyurethane is a high molecular polymer obtained by the reaction between polyether polyol and polyisocyanate or the reaction between polycarbonate polyol and polyisocyanate, but is obtained by the reaction between polycarbonate polyol and polyisocyanate from the viewpoint of water resistance and heat resistance. Is more preferred. Hexamethylene diisocyanate, xylylene diisocyanate as polyisocyanate,
Aliphatic or aromatic polyisocyanates such as isophorone diisocyanate, tolylene diisocyanate, diphenylmethane diisocyanate, triphenylmethane triisocyanate, and naphthylene diisocyanate can be used, but aliphatic polyisocyanates are more preferred from the viewpoint of weather resistance. preferable.

The oxidized polyethylene is obtained by oxidizing polyethylene to have a low molecular weight, and preferably has a hydroxyl group and / or a carboxyl terminal group. An oxide of high-density polyethylene having a molecular weight of 1,000 to 7000 is more preferred.

The fluorine resin is a tetrafluoroethylene polymer,
Trifluoroethylene chloride polymer, tetrafluoroethylene hexafluoropropylene copolymer, tetrafluoroethylene perfluoroalkyl vinyl ether copolymer, tetrafluoroethylene hexafluoropropylene perfluoroalkyl vinyl ether polymer, vinylidene fluoride Copolymers, ethylene tetrafluoroethylene copolymers and the like. As the fluorinated resin, a dispersion obtained by dispersing the fluorinated resin in fine particles in a dispersion medium using a dispersant or an emulsion obtained by emulsifying the fluorinated resin in fine particles in an aqueous medium using an emulsifier is used.

The ethylene urea compound is a compound represented by the following general formula (Chemical Formula 1).

[0011]

Embedded image

Wherein R is an aromatic or aliphatic hydrocarbon residue, and n is 0, 1 or 2. When n = 0, the terminal group of R is a hydrogen residue. Typical compounds include aliphatic or aromatic polyisocyanates such as octadecyl isocyanate, hexamethylene diisocyanate, xylylene diisocyanate, isophorone diisocyanate, tolylene diisocyanate, diphenyl methane diisocyanate, naphthylene diisocyanate, and triphenyl methane triisocyanate, and ethylene. It includes a reaction product with an imine and is usually used in the form of an aqueous dispersion.

The treatment method may be a conventionally known method such as a spray method or a coating method. The yarn fiber or the braid is immersed and impregnated in a liquid obtained by mixing respective aqueous dispersions of polyurethane (A), polyethylene oxide (B), fluororesin (C), and ethylene urea compound (D), and then dried. The simplest heat treatment is used. That is, the impregnation may be performed before the braiding, or may be performed after the braiding. The solid concentration of the treating agent is preferably 1 to 25% by weight. Especially 5 to 20
% By weight is preferred. The drying temperature is preferably 100 to 150 ° C., and the drying time is preferably 0.5 to 20 minutes. Drying temperature is 100
If the temperature is lower than 0 ° C., the formation of a film by the treating agent is insufficient.
If the temperature exceeds 50 ° C., the evaporation of the water in the treating agent proceeds rapidly, so that a good film cannot be formed. Heat treatment temperature is 160 ~
240 ° C., the heat treatment time is preferably 0.2 to 10 minutes.
If the heat treatment temperature is lower than 160 ° C., the formed film is insufficiently crosslinked, and good film strength cannot be obtained. Heat treatment temperature is 2
If the temperature exceeds 40 ° C., the coating is deteriorated and the strength is reduced. The amount of the treatment agent film adhering to the thread after treatment is 0.3 to 1
5% by weight is preferred. Particularly, 2 to 9% by weight is preferable.
If it is less than 0.3% by weight, the abrasion resistance and the bending durability are insufficiently improved. If the amount exceeds 15% by weight, the thread passing after the treatment becomes extremely coarse and the bending durability is reduced.

[0014]

The yarn of the present invention is a yarn which fully satisfies elongation resistance, especially elongation resistance when wet, oil resistance, charge resistance, abrasion resistance, light weight and the like.

Hereinafter, an example in which the present invention is applied to para-aramid fibers to produce a trial yarn and the effects of the present invention are compared and confirmed will be described in detail. The measurement and evaluation of tensile strength, elongation and wear resistance were performed according to the following methods. <Measurement method of tensile strength and elongation> According to 7.5 of JIS-L-1013. <Abrasion resistance evaluation method> An evaluation device is shown in FIG. In FIG. 1, 1 is a thread guide plate for thread division used in a high-speed jacquard machine, 2 is a hole for thread guide, which is opened in 1, 3 is a thread sample for evaluation, and 4 is a free thread. The roll 5 rotates with a load. The wear resistance evaluation was performed as follows. That is, 0.2 at one end of the yarn sample 3 having a braided structure.
After applying a load 5 equivalent to g / denier, the other end of the sample is passed through a roll 4 that freely rotates and a thread guide hole 2 formed in a thread guide plate 1 for thread splitting.
Again, the sample 3 was reciprocated via the freely rotating roll 4 and the sample 3 was reciprocated until the sample 3 was cut by friction and abrasion with the thread guide hole 2 to evaluate the wear resistance. After passing through the yarn guide hole 2, the evaluation sample 3 was set so as to be bent at 90 degrees as shown in FIG. 1, and the other end of the evaluation sample 3 was reciprocated to evaluate the wear resistance. .

[0016]

Example 1 An aramid long fiber yarn consisting of 400 denier 267 filaments (Technola; manufactured by Teijin Limited) was used as a fiber material and braided in a single stroke with 12 strokes to obtain a braided thread-forming sample for jacquard. On the other hand, an aqueous dispersion of polyurethane (A) (active ingredient: 35% by weight), an aqueous dispersion of polyethylene oxide (B) having a molecular weight of 4,500 (active ingredient: 25% by weight), and a tetrafluoroethylene polymer were used as treatment liquids. The aqueous dispersion of (C) (60% by weight of the active ingredient) and the aqueous dispersion of diphenylmethanediethylene urea (D) (25% by weight of the active ingredient) were each adjusted to have a solid content ratio shown in Table 1. Was mixed to prepare a blended liquid. The solids concentration of the treatment liquid thus mixed was 14% by weight. The above-mentioned thread sample for jacquard is immersed in the compounding treatment solution, sufficiently impregnated, squeezed lightly with a nip roll, heat-treated at 120 ° C. for 1.5 minutes, dried and further heat-treated at 180 ° C. for 1.0 minute Then, a crosslinking reaction of the treatment agent coating formed on the fiber surface was performed. Tensile strength measured and evaluated for the obtained jacquard processed thread sample by the method described above,
The elongation and wear resistance were as shown in Table 1.

[0017]

Examples 2 and 4 to 8 A braided shape obtained in the same manner as in Example 1 except that the mixing ratio of the solid content of the treating agent was adjusted to the ratio shown in Table 1. Table 1 shows the results of measurement and evaluation of the jacquard-treated yarn passing sample by the same method as in Example 1.

[0018]

Example 3 Example 2 was the same as Example 2 except that a braided jacquard threading sample having a double braid structure was used in which the inner layer was braided with 4 strokes and the outer layer was braided with 8 strokes. Table 1 shows the results of measurement and evaluation of the braided jacquard-processed thread passing sample obtained in the same manner as in Example 2, which were measured and evaluated in the same manner as in Example 2.

[0019]

[Table 1]

[0020]

COMPARATIVE EXAMPLE 1 A braided thread for jacquard thread before being immersed and impregnated in the compounding treatment agent in Example 1 was measured and evaluated by the same method as in Example 1 and the results are shown in Table 2 of Comparative Example 1. As shown in FIG.

[0021]

Comparative Example 2 In Example 3, a double-braided jacquard thread sample for jacquard before being immersed and impregnated in the compounding agent was measured and evaluated in the same manner as in Example 1. As shown in Comparative Example 2 of Table 2.

[0022]

Comparative Example 3 A braided jacquard-processed thread obtained in the same manner as in Example 1 except that it was immersed and impregnated in a single unmixed treating agent shown in Comparative Example 3 in Table 2. The results of measurement and evaluation of the sample in the same manner as in Example 1 were as shown in Table 2. The amount of the processing agent solids adhered to the jacquard processed thread sample was 4.4% by weight.
Met.

[0023]

COMPARATIVE EXAMPLE 4 A braided jacquard-processed thread obtained in the same manner as in Example 1 except that it was immersed and impregnated in a single unmixed treating agent shown in Comparative Example 4 in Table 2. The results of measurement and evaluation of the sample in the same manner as in Example 1 were as shown in Table 2. The processing agent solid content of the jacquard processed thread sample was 2.9% by weight.
Met.

[0024]

Comparative Example 5 A braided jacquard-processed thread obtained in the same manner as in Example 1 except that it was immersed and impregnated in a single unmixed treating agent shown in Comparative Example 5 in Table 2. The results of measurement and evaluation of the sample in the same manner as in Example 1 were as shown in Table 2. The amount of the processing agent solids adhered to the processed thread sample for jacquard was 2.6% by weight.
Met.

[0025]

Comparative Example 6 A braided jacquard-processed thread obtained in the same manner as in Example 1 except that it was immersed and impregnated in a single unmixed treating agent shown in Comparative Example 6 in Table 2. The results of measurement and evaluation of the sample in the same manner as in Example 1 were as shown in Table 2. The treatment agent solid content of the jacquard treated thread sample was 3.8% by weight.
Met.

[0026]

[Comparative Example 7] A core-sheath structure currently used in the market, in which three aligned yarns of 400 denier polyester fibers are used in the form of a straight core and the sheath is braided with 250 denier polyester fibers at 16 strokes. The results of measurement and evaluation of the jacquard threading sample in the same manner as in Example 1 were as shown in Table 2.

[0027]

[Table 2]

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a wear resistance evaluation device.

[Explanation of symbols]

1. Yarn guide plate for thread splitting used in high-speed jacquard machines. 21 A thread guide hole formed in 1. 3 Threading sample for evaluation. 4 Free rotation roller. 5 Load

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-90348 (JP, A) JP-A-1-106580 (JP, U) JP-A-3-45983 (JP, U) JP-A 4-96 108124 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) D06M 15/00-15/715 D03C 3/40

Claims (1)

(57) [Claims] 1. A thermal decomposition temperature of 230 ° C. or more, a single-fiber fineness of 0.5 to 20.0 denier, and polyurethane (A), polyethylene oxide (B), fluororesin (C), ethylene urea compound ( A thread passing the heat-resistant fiber to which the treatment agent comprising D) is attached is braided.