JP2000226775A - Friction-reducing treatment agent for textile belt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject treatment agent capable of giving textile belts with excellent drawability, containability and durability. SOLUTION: One version of this treatment agent is intended for imparting textile belt webbing and comprises an alkali metal salt of a polyester 2,000-15,000 in average molecular weight prepared by polycondensation between ethylene glycol, isophthalic acid or terephthalic acid and sulfoisophthalic acid or sulfoterephthalic acid. The other version of this treatment agent comprises the above-mentioned alkali metal salt of the polyester and a smoothing agent component. The liquid form of this treatment agent is an aqueous emulsion containing this agent as the active ingredient at a concentration of 2-50 wt.% and having a surface tension of <=35 dyne/cm at 20 deg.C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low friction treating agent applied to a fiber belt webbing.
More specifically, the present invention relates to a treatment agent which has a good draw-out / storability of a fiber belt, and which can impart excellent performance in durability which cannot be obtained by a conventional low friction treatment agent for a fiber belt.

[0002]

2. Description of the Related Art Conventionally, a fiber belt webbing is generally provided with an oil agent typified by silicone oil or with a resin coat in order to facilitate the pull-out property and the storage property. For example, a composition comprising an ester of a branched alcohol and a higher fatty acid and a nonionic activator (JP-A-2-175966), an average molecular weight of 1,000 to
3000 polyether compounds (JP-A-10-3707)
No. 8), a urethane prepolymer block compound (Japanese Patent Publication No. 4-66498) and a polyether polyester resin (JP-A-10-37075).

[0003]

However, in the conventional resin-processed fiber belt webbing, when a crosslinked polyurethane resin, polyacrylate resin, or polyether polyester resin is used as in the former case, the fiber belt is not exposed. The resin on the surface is shaved and falls off due to repeated rubbing with a through ring (made of nylon resin), which is a guide for putting in. As a result, the dropped resin or dirt adheres to the surface of the fiber belt webbing,
There has been a problem that withdrawal and storage properties have been significantly reduced over time. Therefore, the present invention solves the above-mentioned problems in the prior art, and by applying the fiber belt webbing, reduces the frictional properties of the fiber, sufficiently increases the initial slipperiness, and can be used for a long period of time. It is an object of the present invention to provide a low-friction treating agent for a fiber belt capable of obtaining a fiber belt which can be favorably maintained, that is, a fiber belt having excellent drawability, storage property and durability.

[0004]

Means for Solving the Problems In order to achieve the above object, the first of the friction reducing agents for fiber belts of the present invention is:
An agent for reducing friction for imparting a fiber belt webbing, the average molecular weight of polycondensation of ethylene glycol and isophthalic acid or terephthalic acid and sulfoisophthalic acid or sulfoterephthalic acid, an alkali metal salt of a polyester compound of 2000 to 15000 The second invention contains the alkali metal salt of the polyester compound and a leveling agent component. The low friction treatment liquid for a fiber belt according to the present invention is a 2 to 50% by weight aqueous emulsion containing these low friction treatment agents as active ingredients, and has a surface tension at 20 ° C. of 35 dynes / c.
m or less, and has excellent permeability to the fiber belt. More preferably, a low friction treatment agent for a fiber belt is characterized in that the alkali metal salt of polyester accounts for 20% by weight or more of the whole treatment agent, and further contains a silicone compound as a smoothing agent.

[0005] A processed product having a dialkylpolysiloxane skeleton called silicone oil as a silicone compound, which is generally dimethylpolysiloxane and its glycol-modified silicone, wherein the silicone skeleton is a dimethylpolysiloxane unit or an amino group. It is preferably a modified dimethylpolysiloxane unit, a carboxy-modified dimethylpolysiloxane unit or an epoxy-modified polysiloxane unit, and the content of the silicone-based compound is preferably 1 to 50% by weight of the whole treating agent.

The average molecular weight referred to in the present invention is a number average molecular weight measured by gel permeation chromatography or the like. Further, the low-friction treating agent of the present invention is to maintain an aqueous emulsion liquid other than the above-mentioned ethylene glycol and a polyester compound obtained by polycondensing isophthalic acid or terephthalic acid and sulfoisophthalic acid or sulfoterephthalic acid and a smoothing agent component. May contain a surfactant or the like,
The compounding ratio is preferably in the range of 5 to 15% by weight.

[0007] The present invention is intended to solve the current problems of deterioration of the draw-out property and storage property of the fiber belt webbing over time due to the processed resin, that is, acrylic resin, urethane resin, polyether polyester resin and the like. Is cross-linked by performing heat treatment on the fiber belt to improve the adhesiveness with the polyester fiber currently mainly used as the webbing material of the fiber belt, and to improve the initial drawability and the smoothness property that affects the storage property. At the same time, the durability is given, but the smoothness characteristics that affect the drawability and the storage property and the deterioration over time are due to the resin used and the polyester fiber used mainly as a fiber belt webbing material. Based on the results of the study that the adhesion is poor, we started to study resins that have excellent adhesion to polyester fibers, A resin obtained by polycondensing ethylene glycol and isophthalic acid or terephthalic acid having similar compositions is excellent in adhesiveness, and by introducing sulfoisophthalic acid or sulfoterephthalic acid to make the resin an aqueous dispersion, polyester The resin on the surface was not scraped off by repeated rubbing with a through ring (made of nylon resin), which is a guide for assisting in and out of the fiber belt, without hindering the adhesiveness to the fiber. By the resin adhering to the surface of the fiber belt webbing,
It has been found that the drawability and the storage property do not significantly decrease over time.

Further, conventionally, silicone oil has been used as a leveling agent because it has the best performance and is often used. However, the ethylene glycol of the present invention is polycondensed with isophthalic acid or terephthalic acid and sulfoisophthalic acid or sulfoterephthalic acid. By studying the performance as a low friction treatment agent and the adhesiveness with polyester fiber, that is, the improvement of the phenomenon of resin falling off due to repeated rubbing with through ringing, by using in combination with resin, Glycol called water-soluble silicone As a smoothing agent used in combination with the modified silicone, it has been found that the modified silicone is an excellent smoothing agent without deteriorating the adhesiveness between the resin of the present invention and the polyester fiber of the fiber belt webbing.

[0009]

The present invention will be described in detail with reference to the following examples. The evaluations in the following Examples and Comparative Examples are performed on the webbing for an automobile seat belt, which is one of the fiber belts, according to the following method and displayed. Surface tension of processing solution (dyne / cm) The surface tension of the processing solution is measured at 20 ° C. using an automatic surface tensiometer [KYOWA CBVP S manufactured by Kyowa Kagaku Co., Ltd.]
URFACE TENSIOMETER] A3 type. Sliding friction with the through ring (N) Fix the through ring on top of the tensile tester. 5 at one end
A seat belt webbing with a load of 00 g is passed through a through ring, and the other end is attached to a 50N load cell installed in a moving part of a tensile tester. 50cm moving part
/ Min, that is, the force (f1) required when the seat belt webbing raises the load via the through ring and the force (f1) for returning the load to the original position.
2) is measured and taken as the initial sliding friction. The smaller the value of f1 and the larger the value of f2, the better the slipperiness. Durability test (N) Apply a load of 1000 g to one end of the seat belt webbing, and make an angle of 90 degrees through a through ring to reach 30c.
After rubbing 10,000 times at a distance of 30 reciprocations / minute at a distance of m to deteriorate the surface of the seat belt webbing, the sliding friction with the through ring was measured in the same manner as above,
Sliding friction after deterioration. Light Resistance / Durability Test (N) Under the above conditions, the surface where the seat belt webbing is rubbed with the through ring is irradiated with light for a certain time using a light resistance tester, and then a load of 1000 g is applied to one end of the seat belt webbing. At a 90 degree angle through
It rubs 10,000 times at a speed of 30 reciprocations / minute over a distance of 0 cm to deteriorate the surface of the seat belt webbing. The sliding friction between the seat belt webbing and the through ring is measured by the same method as described above, and is defined as the sliding friction after deterioration. Hex bar wear test (%) Abrasion resistance test [JIS-D-4604 ・ 7.4 (2)
According to (2.1) (a)], the strength of the seat belt webbing after 2500 times of wear is measured, and the strength retention rate is calculated from the strength before wear.

Examples 1 to 3 and Comparative Examples 1 to 3 Seat belt webbing, which is dyed black and has not been subjected to any processing agent which imparts abrasion resistance and low friction, has a pure content of 5% by weight. And then squeezed so that 0.5% by weight of the treating agent in a weight ratio with respect to the seat belt webbing adheres thereto, dried at 100 ° C. for 5 minutes, and then dried at 150 ° C. for 3 minutes. Test samples subjected to heat treatment were prepared. The symbol of each component of the treating agent shown in the test results represents the compound shown below. A1: Polyester compound of the present invention (average molecular weight 140
00) A2: Polyester compound of the present invention (average molecular weight 560)
0) B1: Water-soluble silicone compound required for the present invention [“KF-888” manufactured by Shin-Etsu Chemical Co., Ltd.] B2: Water-soluble silicone compound required for the present invention [“SH-8410 manufactured by Toray Dow Corning” C1: Polyacrylic acid ester resin emulsion [“MAR” manufactured by Matsumoto Yushi Pharmaceutical Co., Ltd.] C2: Crosslinked polyurethane resin [“BAYPRET USV” manufactured by Bayer AG] C3: Polyester resin other than the present invention [Takamatsu Yushi ( stock)
"EX-200"] D4: dimethyl silicone emulsion ["SH-8710" manufactured by Toray Dow Corning]

[0011]

[Table 1]

As is clear from the test results, in the case of Examples 1 to 3 according to the present invention, the slipperiness with the initial through ring is relatively good, and the slipperiness is almost reduced even after the durability test and the light and durability tests. When not performed, excellent durability was exhibited, and excellent results were also exhibited with respect to the hexagonal rod wear retention rate. On the other hand, in the comparative examples other than the present invention, the initial slipperiness was considerably good, but in particular, in the comparative example 1, the slipperiness after the durability test was significantly reduced, and the hexagonal rod abrasion retention was lower than that of the product of the present invention. The results were lower. Further, Comparative Example 2 was unsatisfactory, particularly in that the slipperiness after the light resistance and durability test was significantly reduced.

[0013]

According to the present invention, the agent for reducing friction of the fiber belt of the present invention is applied to a polyester fiber belt, that is, a seat belt, or a belt for industrial materials (sling belt, lashing belt, etc.). This has the effect of providing durable low friction characteristics and wear resistance characteristics with the contact component composed of: For example, when processed into a webbing for a seatbelt, the durability showed that the initial seatbelt retractability corresponding to that of a new vehicle can be maintained in a good state even after long use. Furthermore, a polyester seatbelt webbing excellent in abrasion retention could be obtained.

 ────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Akira Honjo 2-3-1 Shibukawacho, Yao-shi, Osaka Matsumoto Yushi Pharmaceutical Co., Ltd. F-term (reference) 4L033 AC08 AC09 BA96 CA45 CA59

Claims (6)

[Claims] 1. A low-friction treating agent for applying a fiber belt webbing, wherein (a) ethylene glycol and (b) isophthalic acid or terephthalic acid and (c) sulfoisophthalic acid or sulfoterephthalic acid are polycondensed. A friction reducing agent for a fiber belt, comprising an alkali metal salt of a polyester compound having an average molecular weight of 2,000 to 15,000. 2. The friction reducing treatment agent for a fiber belt according to claim 1, wherein the alkali metal salt of the polyester compound accounts for 20% by weight or more of the entire treatment agent. 3. An alkali metal salt of a polyester compound having an average molecular weight of 2,000 to 15,000, obtained by polycondensing (a) ethylene glycol with (b) isophthalic acid or terephthalic acid and (c) sulfoisophthalic acid or sulfoterephthalic acid. An agent for reducing friction of a fiber belt, comprising an agent component. 4. The smoothing agent component is a compound having a dialkylpolysiloxane skeleton, and the silicone skeleton is a dimethylpolysiloxane unit, an amino-modified dimethylpolysiloxane unit, a carboxy-modified dimethylpolysiloxane unit, or an epoxy-modified dimethylpolysiloxane unit. The low-friction treating agent for a fiber belt according to claim 3, characterized in that: 5. The low-friction treating agent for a fiber belt according to claim 3, wherein the content of the smoothing agent component is 1 to 50% by weight. 6. A 2 to 50% by weight aqueous emulsion containing the low-friction treating agent according to claim 1 as an active ingredient, and having a surface tension at 20 ° C. of 35.
A friction reducing treatment liquid for a fiber belt, which has a dyne / cm or less.