JPH1037078A - Low friction treating agent for seat belt and raw yarn for seat belt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a treating agent for lowering the friction of a raw thread for a seatbelt or a seatbelt webbing excellent in initial slipping properties, housing properties and durability by blending a specific polyether-polyester with a silicone-based compound and/or an extreme-pressure agent component. SOLUTION: This treating agent for lowering the friction capable of being applied to a raw thread and/or a webbing for a seatbelt is obtained by blending >=30wt.% polyether compound having 1,000-3,000cSt viscosity and 1,000-3,000 average molecular weight based on the total amount of the treating agent with silicone-based compound such as dimethylpolysiloxane and/or an extreme- pressure agent such as an oleic acid soap. A treating liquid comprising an aqueous emulsion containing the 1-20wt.% treating agent for lowering the friction as an active ingredient and having both <=35 dyne/cm surface tension at 25 deg.C and <=15sec penetrating properties measured by a canvas method is prepared and imparted to a fiber so as to attach to the fiber in 0.05-5wt.% to provide the raw thread for a seatbelt.

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 which is particularly suitable for applying to a yarn for a seat belt in a yarn-making process or the like. More specifically, the present invention relates to a low-friction treating agent which has good storage stability of a seat belt, can maintain good storage stability even after abrasion, and is effective for obtaining a seat belt having excellent storage durability.

[0002]

2. Description of the Related Art Conventionally, it is common practice to weave a yarn for a seat belt, dye the webbing into webbing, and then apply a resin coat to facilitate pulling out and storing of the seat belt, that is, to improve storage stability. Have been done. Further, various treating agents such as a spinning oil agent are applied to the original yarn for the seat belt in the spinning / drawing process.

For example, as a coating resin for improving the abrasion resistance of a seat belt, a resin containing a urethane prepolymer block compound as a main component is known (Japanese Patent Publication No. Hei 4 (1994)).
-66948). In this case, a resin containing a urethane prepolymer block compound as a main component is applied to the seatbelt webbing, and crosslinking is caused by performing a heat treatment to greatly improve the absolute value of the initial slipperiness. It is intended to obtain a desired level of slippage even after the slippage has been reduced by use.

Further, as a conventional treating agent for a seatbelt yarn, a treating agent mainly comprising a composition of a branched alcohol, an ester of a higher fatty acid and a nonionic activator (for example, JP-A-2-175966). )It has been known. That is, the treatment agent for a seatbelt yarn is intended to improve light fastness by using a branched alcohol and an ester of a higher fatty acid as a smoothing agent and using a non-ionic activator containing no propylene oxide. .

[0005]

However, in the case of a seat belt coated with a resin, in particular, a seat belt coated with a cross-linkable resin such as the former, the surface of the belt becomes hard, so that it has been used for a long period of time. The resin coated on the surface is gradually scraped off by repeated rubbing with a through belt (made of nylon resin) which is a guide for assisting in and out of the seat belt. Further, dirt gradually adheres to the belt surface. These results, over time,
There has been a major problem that the belt cannot be stored or pulled out smoothly, and the storage property is significantly reduced over time.

In the case of the conventional yarn imparting treatment agent such as the latter, if it is used as a non-coated belt without a resin coat, there is no sharp drop in slippage due to resin falling off or the like. -There is a major problem that the friction between metals cannot be sufficiently reduced, the initial slip property is poor, and the wear resistance is also poor, so that it has not been put to practical use.

Accordingly, a main object of the present invention is to solve the above-mentioned problems in the prior art, and it is possible to apply the present invention to a yarn for a seat belt or to a webbing. It is a low-friction treating agent suitable for application.Furthermore, the friction properties of the fibers constituting the seat belt are sufficiently low, the initial slip property of the seat belt is sufficiently high, and the properties such as the slip property are long. Provided is a low-friction treating agent capable of obtaining a seat belt which can be favorably maintained after use for a period of time, that is, a seat belt having excellent storage stability and durability, and also excellent wear resistance retention. It is in.

[0008]

Means for Solving the Problems In order to achieve the above object, the low friction treating agent for seat belts of the present invention is characterized by containing a polyether compound having an average molecular weight of 1,000 to 3,000.

The polyether compound has a viscosity of 1000 to 3
000 centipoise, and the compounding amount is preferably 30% by weight or more of the entire treatment agent,
Further, it is preferable to contain a silicone compound and / or an extreme pressure agent component together with the polyether compound.

[0010] Further, the treating agent is used as an active ingredient.
A 0% by weight aqueous emulsion liquid having a surface tension of not more than 35 dynes / cm at 25 ° C. and 25 ° C.
Is preferably used as a low-friction treatment liquid for seat belts having a Campus method permeability of 15 seconds or less. Furthermore, the amount of the treatment agent adhering to the fibers is preferably 0.05 to 5.0% by weight.

Since the treating agent of the present invention has high permeability, it can be uniformly attached to the surface of the filament located inside the seatbelt yarn. When applied to the seatbelt webbing, the treating agent can be uniformly coated on the surface of the seatbelt and also on the surface of the filaments inside the seatbelt. Therefore, unlike a conventional seat belt whose surface is coated with a resin, the belt does not have a two-layer structure of a resin layer and a belt (fiber) layer.
Since the treatment agent is sufficiently adhered to the fibers inside the belt and has low friction properties, a seat belt having both high storability and a high abrasion resistance retention rate can be obtained.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The polyether compound used in the treating agent of the present invention needs to have an average molecular weight of 1,000 to 3,000 for slipperiness and penetration into the yarn or webbing. Preferably average molecular weight 1500-2
500 is good. Further, its viscosity (measured at 25 ° C.) is 1
It is preferably from 000 to 3000 centistokes, particularly preferably from 1500 to 2500 centistokes. If the average molecular weight or viscosity is too small, the strength of the oil film becomes insufficient and the slipperiness after abrasion deteriorates,
It is difficult to obtain the desired effect. On the other hand, if the average molecular weight or viscosity is too large, the friction characteristics cannot be sufficiently improved, so that the slipperiness is deteriorated and the desired effect is hardly obtained.

Examples of the polyether compound include polymers derived from ethylene oxide, propylene oxide, hydrofuran and the like. The monomer constituting the polymer may be only one kind or plural kinds. Further, a polyether compound obtained by polymerizing a low molecular alcohol as a starting material may be used.

The average molecular weight referred to in the present invention is a number average molecular weight measured by GPC (gel permeation chromatography) or the like.

Further, the polyether compound is used at room temperature (2.
(0 to 25 ° C.). This is because the seat belt to which the treating agent is applied can be kept in a liquid state without becoming a paste under ordinary-temperature conditions at which it is used daily, and the intended function of low friction can be sufficiently exhibited at the time of use. is there.

The above-mentioned polyether compound preferably accounts for 30 to 100% by weight of the whole treating agent, and may be used alone or in combination of two or more. If the content is less than 30% by weight, the desired effect of the polyether compound is hardly exerted sufficiently, which is not preferable in terms of the slipperiness of the seat belt and the slipperiness after abrasion. Preferably, the content is 40 to 100% by weight.

The low friction treating agent of the present invention preferably contains a silicone compound (B) and / or an extreme pressure agent component (D) in addition to the above polyether compound.
Further, it may contain a smoothing component (C) and a surfactant component (E) other than the above. The total of their contents is preferably at most 70% by weight.

As the silicone compound (B),
Examples thereof include dimethylpolysiloxane and methylphenylpolysiloxane having viscosities of 100 to 10,000 centipoise at 25 ° C., and modified silicone such as amino-modified, polyether-modified, carboxy-modified or alkyl-modified. Preferably, it is a dimethylpolysiloxane or an amino-modified silicone having a viscosity at 25 ° C. of 200 to 7000 centistokes.

When the silicone compound (B) is blended, it preferably accounts for 2 to 50% by weight of the whole treating agent. Particularly, 5 to 35% by weight is preferable. If the content is less than 2% by weight, the effect of the addition of the silicone compound cannot be sufficiently exerted, so that the slip characteristics at low temperatures (for example, below freezing points such as winter temperatures in an extremely cold region), that is, the storage stability at low temperatures, is not sufficient. Will be enough. If the amount is more than 50% by weight, the effect of the polyether compound is not sufficiently exerted, the oil film strength becomes weak, and the slipperiness after abrasion deteriorates, so that it is difficult to obtain desired friction characteristics.

The lubricating component (C) includes mineral oil (refined spindle oil, liquid paraffin), animal and vegetable oils (coconut oil, castor oil, etc.), fatty acid esters (isostearyl laurate, oleyl oleate, dioleyl adipate, etc.). ), Alkyl ether esters (such as laurate of adduct of lauryl alcohol with 2 moles of ethylene oxide, and laurate of tridecyl alcohol with 3 moles of ethylene oxide). Of these, preferred are fatty acid esters and alkyl ethers. It is an ester. When the smoothing component (C) is blended, the proportion is 5 to 30% by weight, particularly 10% by weight.
The range of -20% by weight is good.

The extreme pressure agent component (D) is a component having an effect of increasing the oil film strength of the treating agent, and includes, for example, fatty acid soaps such as oleic acid soap and erucic acid soap, potassium lauryl phosphate and sodium oleyl phosphate. And organic sulfonate salts such as sodium salt of lauryl sulfonate and sodium salt of dodecylbenzene sulfonate.

When the extreme pressure agent component (D) is blended, its ratio is preferably in the range of 0.02 to 10% by weight, particularly 1 to 5% by weight. If it is less than 0.02% by weight, the effect of increasing the oil film strength is not sufficiently exhibited, which is not preferable. On the other hand, if it exceeds 10% by weight, the increase in viscosity increases and the slipperiness deteriorates.

As the surfactant (E), alkylene oxide adducts of higher alcohols (ethylene / propion oxide adduct of octyl alcohol, ethylene / propion oxide adduct of stearyl alcohol, ethylene oxide adduct of oleyl alcohol, etc.) ), Alkylene oxide adducts of polyhydric alcohol esters (eg, 25 mol adduct of ethylene oxide of hydrogenated castor oil, 20 mol adduct of ethylene oxide of sorbitan triolate).

When the surfactant component (E) is blended, its proportion is preferably in the range of 5 to 20% by weight, particularly 10 to 15% by weight.

Further, in addition to the above-mentioned components, the low friction treating agent of the present invention may further include a pH adjuster such as an alkali metal or an alkylene oxide adduct of an alkylamine, an antioxidant, an ultraviolet absorber, and a fluorine compound. Other additives such as may be blended as needed.

When the above-mentioned pH adjuster is blended, its proportion is 0.02 to 10% by weight, particularly 0.03 to 8% by weight.
Range is good. When compounding other additives,
Their proportion is from 0.02 to 10% by weight, in particular 0.03% by weight.
The range is preferably up to 5% by weight.

The low-friction treating agent of the present invention is preferably used as an aqueous emulsion solution having a concentration of 1 to 20% by weight in the treatment of the original yarn for seat belt and the treatment of the seat belt webbing. If the adhesiveness and permeability of the emulsion are not impaired, it may be used in a more concentrated aqueous emulsion solution, may be used in a substantially undiluted solution state, or may be diluted with an organic solvent. It may be used as a liquid. Particularly preferably, an aqueous emulsion having a concentration of 2 to 10% by weight is preferred.

When used as a treatment solution of an aqueous emulsion having a concentration of 1 to 20% by weight, the treatment solution may have a surface tension at 25 ° C. of 35 dynes / cm or less and a campus permeability at 25 ° C. of 15 seconds or less. It is preferred for adhering to the raw yarn and webbing and penetrating into them. If the surface tension exceeds 35 dynes / cm, the adhesion to the yarn and webbing tends to be insufficient. Also,
If the campus permeability exceeds 15 seconds, the permeability of the treatment agent tends to deteriorate, which is not preferable because the durability of the storage property is enhanced.

The low-friction treating agent of the present invention is formed into a treating solution such as an aqueous emulsion treating solution in which the treating agent is emulsified,
It may be applied in a yarn-making process for producing a seatbelt yarn, or may be applied to seatbelt webbing.

For example, in the spinning process of drawing, heat-treating and winding the spun synthetic fiber, a low-friction treatment liquid may be applied between the heat treatment and the winding. If it can be applied in an amount, it can be applied as a spinning oil. The application to the seatbelt yarn may be performed after winding, for example, before weaving, but is preferably performed immediately before winding in the yarn-making process. A method such as roller lubrication or guide lubrication may be used for applying to the yarn.

When the friction reducing agent is applied at a stage after weaving the webbing for the seat belt to form the webbing, a method of immersing the webbing in the liquid or spraying the liquid on the surface of the webbing is used. What is necessary is just to provide by arbitrary methods, such as a method. When the webbing is dyed, it is preferable to apply a low friction treating agent after the dyeing.

The amount of the treatment agent to be applied may be 0.05 to 5.0% by weight in terms of the effective amount of the treatment agent relative to the fiber, and is preferably 0.2 to 2.0% by weight in the case of providing a yarn. In the case of webbing, the content is preferably 0.1 to 1.5% by weight.

Such a low-friction treating agent of the present invention can satisfy the desired low-friction characteristics required for a seat belt by being applied to a raw yarn or webbing. It can be used for a seat belt without applying.

Further, since the low friction treatment agent of the present invention has much better permeability than the conventional resin coat, it greatly penetrates into the yarn and the inside of the webbing, and the treatment agent is used for the seat belt. The surface of the webbing as well as the surface of the filament inside the belt constituting the webbing can be uniformly coated. Therefore, since the belt does not have a two-layer structure of a resin layer and a belt (fiber) layer as in a conventional seat belt in which only the belt surface is resin-coated, even if fibers on the belt surface are scraped off by long-term use. In addition, since the treating agent also adheres to the fibers inside the belt and has a low friction property, it is possible to maintain a high storability and to provide a seat belt having a high abrasion resistance retention of the storability.

Examples of the seatbelt yarn and the seatbelt webbing to which the friction reducing agent of the present invention is applied include a seatbelt yarn and a seatbelt webbing made of synthetic fibers such as polyester fibers, and carbon black. The original yarn for the seat belt of the original fiber composed of the polymer colored by the various pigments, and the seat belt webbing.

A seatbelt obtained by applying the low friction treating agent of the present invention to a yarn or webbing for a seatbelt is far superior to a conventional seatbelt, particularly in terms of slipperiness after long-term use. That is, the reason why the storage durability is excellent is considered to be due to the following action mechanism.

In a conventional seat belt, for example, a resin containing a urethane prepolymer block compound as a main component is applied to the belt (Japanese Patent Publication No. 4-66948) to improve the slipperiness. There has been a problem that the resin layer coated on the belt surface is peeled off due to abrasion when the belt is repeatedly attached and detached for a long period of time, and the slipperiness is significantly deteriorated. In some cases, the resin that has been abraded and peeled may form a scum and may accumulate, or a dirt substance may adhere to the abraded portion, resulting in abnormal slipperiness. For this reason, many attempts have been made to develop a resin having more excellent wear resistance and to apply a relatively thick resin layer. However, no satisfactory resin has been obtained.

On the other hand, in the present invention, the slip property of the individual filaments of the yarns constituting the belt is imparted to the surface layer without depending on the slip property of the belt, thereby obtaining a desired slip property. It is assumed that.

A resin layer coated on a conventional seat belt covers the surface of the belt, and usually only a part of the resin permeates into the inside of the belt. That is, the coating resin does not reach the surface of the filament located at the innermost layer portion of the belt, which can be confirmed by analyzing the surface material of the fiber decomposed from the belt.

However, when the treating agent of the present invention is applied, the treating agent sufficiently penetrates not only on the belt surface but also on the innermost layer of the belt, and also on the surface of each filament of the yarn constituting the innermost layer of the belt. In this respect, it is significantly different from the conventional seat belt.

Further, since the conventional seat belt coat resin has high adhesiveness, if it is applied to the seat belt raw yarn in the spinning process, it becomes difficult to unwind the raw yarn from the cheese.
In addition, there were problems such as increased scum in the belt weaving process, and it was difficult to put the belt into practical use.

However, since the treating agent of the present invention does not have the high tackiness of the conventional coating resin for seat belts, it can be applied to the original yarn for the seat belt and wound up in the spinning process. No substantial change occurs in the surface properties of the resulting yarn. Therefore, unwinding of the original yarn from the cheese is easy, and there is no obstacle of scum generation in the belt weaving process.
The belt can be smoothly passed through the weaving process.

When the treatment agent is applied at the yarn stage as described above, a seat belt having excellent storage durability and other characteristics can be obtained even if the resin coating step in the seat belt manufacturing process is omitted. This is particularly effective when a seat belt is manufactured with yarn.

When the seat belt webbing is colored by dyeing, it is possible to obtain a finer color tone than the original one, and in this case, the treating agent of the present invention is applied to the webbing after the dyeing. Is preferred.

As described above, the low friction treating agent of the present invention comprises
It can be applied at any stage in a wide range of manufacturing processes from yarn production to seat belt production, and it can exhibit desirable seat belt characteristics such as excellent storage durability at any stage. it can.

[0046]

The present invention will be described in more detail with reference to the following examples. The evaluations in the following Examples and Comparative Examples are performed and indicated by the following methods.

Fiber-to-fiber friction: The coefficient of friction between the fibers is measured using a radar-type friction measuring device for the seatbelt yarn to which the treating agent has been applied. The smaller the value of the friction, the smaller the friction between the fibers and the higher the flexibility, so the more excellent the sliding property.

As described above, the coefficient of friction between the fiber and the metal of the sheet yarn for a seat belt to which the treating agent has been applied is determined using a Toray high-load micron device. Measure. The sliding speed between the fiber and the metal at the time of the measurement is 0.5 m / min or 300 m / min. The friction at a sliding speed of 0.5 m / min indicates the level of the oil film strength, and a smaller value means a higher oil film strength. Further, the friction at a sliding speed of 300 m / min represents the level of smoothness, and a smaller value means that the sliding is better.

Surface tension of treatment liquid (dyne / cm): 2
The surface tension of the processing solution was measured at 5 ° C by Kyowa Interface Science Co., Ltd.
It is measured using a CBVP-A3 type automatic surface tensiometer manufactured by Toshiba Corporation. Campus permeability of processing solution (seconds): Put the processing solution in a 100 cc beaker, adjust the temperature for 15 minutes in a constant temperature bath at 25 ° C., and gently apply 2 cm × 2 cm size 3 mm wool felt to the surface of the solution. Measure the time (seconds) before floating and settling in the liquid. An average value is calculated by performing five measurements.

Sliding friction with the through (%): A load of 500 g is set on one end of the seat belt, an intermediate portion thereof is inserted through the through, and a 10 kg load cell is set at the other end at an angle of 20 °. Strength (F1) when raising the load with the load cell and strength (F1) when returning the load to the base
2) is measured, and the value of the square root of (F2 / F1) × 100 is defined as the sliding friction (%). The higher the value of the sliding friction,
Low friction characteristics and excellent storage properties.

Sliding friction after abrasion (%): A seat belt was used as a friction material with sandpaper (No. 500).
The surface of the belt is abraded by applying a load of 00 g and rubbing 500 times back and forth. After the abrasion, the sliding friction with the through is measured in the same manner as described above, and is defined as the sliding friction (%) after the abrasion.

Hex bar wear retention (%): The strength of the seat belt after 5,000 times of wear is measured according to the wear resistance test (JIS-4604 method), and the strength retention is calculated from the strength before wear. .

[Examples 1 to 5 and Comparative Examples 1 to 3] A polyethylene terephthalate-based chip (containing no pigment),
20 carbon black in polyethylene terephthalate
A blend chip obtained by mixing the master chip containing 40% by weight with a weight ratio of 40: 1 is subjected to melt spinning, melt-spun by an ordinary method, taken up at a spinning speed of 500 m / min, and continuously without winding. And hot stretching at 245 ° C. by a two-stage stretching using a hot roller at a total stretching ratio of 5 times. Then, immediately before winding, a 20% by weight aqueous emulsion of a treating agent having the composition shown in Table 1 was added to an oiling roller. Was used to give 1.0% by weight as an active ingredient, and wound up at 3000 m / min to produce a raw yarn for a seatbelt of black denatured polyester filament yarn of 1500 denier 144 filaments.

Each symbol of the treating agent component in Table 1 represents the compound shown below. A1 to A3 are polyether compounds specified in the present invention, B1 to B3 are silicone compounds (B), C1 to C2 are other leveling agents (C), and D1 to D3 are extreme pressure. Agent component (D), E1 to E4 are surfactant components (E), and F1 to E2 are other additives. R1 and R2 are resin components used in a conventional resin coat.

A1 ·· Ethylene oxide / propylene oxide copolymer (molecular weight 2500, viscosity 260
0) A2 ··· Polytetramethylene glycol / ethylene oxide / propylene oxide copolymer (molecular weight 2500, viscosity 2800) A3 ·· butyl alcohol · ethylene oxide / propylene oxide adduct (molecular weight 2500, viscosity 210)
0) B1..dimethylpolysiloxane (viscosity 1000 centistokes) B2..amino-modified silicone C1..oleyl oleate C2..isostearyl oleate

D1 • Lauryl (EO) 2 phosphate K salt D2 • Isostearyl alcohol (EO) 3 phosphate Na salt D3 • Oleic acid soap E1 • Lauryl alcohol PO • EO addition Product (molecular weight 1500) E2 ·· octyl alcohol PO · EO adduct (molecular weight 1500) E3 ·· oleyl alcohol EO adduct (molecular weight 90)
0) E4 ··· 10 moles of hydrogenated castor oil (EO) F1 ··· “IRGANOX” 245 (manufactured by Ciba Geigy Co., Ltd.) F2 ··· 10 moles of stearylamine (EO) R1 ··· Hydroxy-containing silicon, urethane Prepolymer-blocked resin R2..Methylol melamine resin

[0057]

[Table 1] Note) The numbers in the table indicate% by weight.

Table 2 shows the results of the evaluation of the friction characteristics of the black original seat belt yarn to which the treating agent was attached.

Further, using the obtained black raw seatbelt raw yarn, weaving was carried out by a usual method to produce a seatbelt webbing, and a seatbelt was obtained without dyeing or resin coating.

The characteristics of the obtained seat belt were evaluated as shown in Table 2.

[0061]

[Table 2]

As is apparent from Table 2, in the case of Examples 1 to 5 according to the present invention, the friction characteristics of the original yarn of the seat belt are low, the slipperiness between the seat belt and the through belt is good, and furthermore, the wear is reduced. After that, the slipperiness between the seat belt and the through hardly decreased, and the storage stability and the durability were excellent. Furthermore, the durability due to hexagonal rod wear was excellent.

On the other hand, in the case of Comparative Example 1 in which the polyether compound specified in the present invention was not blended, and in the case of Comparative Examples 2 and 3 in which the conventional coating resin was added, the slipperiness with the through was poor. The better, the worse the slippage due to abrasion was, and the slipperiness of the abrasion was unsatisfactory. In addition, durability due to hexagonal bar wear was poor.

Further, the raw yarns for seat belts obtained in Examples 1 to 5 were easy to unwind even though the friction reducing agent was adhered. On the other hand, in the case of Comparative Examples 2 and 3 to which the conventional coat resin was applied, the tackiness on the fiber surface was high, and it was difficult to unwind the original yarn from the cheese.

[Examples 6 to 7 and Comparative Examples 4 to 6] Polyethylene terephthalate-based chips (excluding carbon black) were subjected to melt spinning, and no low friction treatment agent was applied immediately before winding. Except for the above, a polyester filament yarn of 1500 denier 144 filaments was manufactured by the same spinning method as in Example 1.

Using the obtained polyester filament yarn, weaving is carried out in a usual manner to produce a seat belt webbing, dyed in black by a usual manner, and further treated at a concentration of 5% by weight of a treating agent having the composition shown in Table 3. Immersed in a water emulsion solution, and added 0.5% of the effective amount of the treating agent to the total weight of the fiber.
After adhering the treating agent of weight%, it was pre-dried at 110 ° C. for 3 minutes and then heat-treated at 150 ° C. for 3 minutes to produce a seat belt.

The symbols of the treating agent components in Table 3 are as described above, except for the following. A4 butyl alcohol ethylene oxide propylene oxide adduct (molecular weight 500, viscosity 900)

[0068]

[Table 3] Note) The numbers in Table 3 indicate% by weight.

Table 4 shows the results of evaluating the characteristics of the seat belt obtained by attaching the treating agent.

[0070]

[Table 4]

As is clear from Table 4, the low friction treating agent of the present invention is extremely effective even when applied to a seat belt webbing, and is excellent in seat belt storage, its durability and abrasion durability. A seat belt was obtained.

On the other hand, in the case of Comparative Example 4 in which the average molecular weight of the polyether compound is outside the scope of the present invention, and in the case of Comparative Examples 5 to 6 to which a conventional coating resin was applied, the initial sliding property was excellent. Slippage was greatly deteriorated by abrasion, and the abrasion after abrasion was unsatisfactory. Further, the wear durability was poor.

[0073]

The agent for reducing friction of the present invention can be applied to the original yarn for seat belt or to the webbing, and can be applied at any stage from the yarn-making process to the production of the seat belt. This is particularly suitable for applying a seatbelt yarn.

Therefore, for example, if the low friction treating agent of the present invention is applied to the yarn for seat belt made of the original fibers,
It is possible to obtain a seat belt having desired properties without dyeing or resin coating at the seat belt webbing stage.

In addition, the seat belt to which the treating agent is applied has sufficiently low friction characteristics of the yarns constituting the seat belt, sufficiently high initial slip characteristics of the seat belt, and characteristics such as slip characteristics. Can be maintained satisfactorily even after long-term use, so that a seat belt having excellent storage stability, durability and abrasion resistance retention rate can be obtained.

This is particularly effective in the case of a seat belt made of polyester fiber, and a polyester fiber seat belt excellent in slipperiness, abrasion resistance and storage property can be obtained.

Claims (7)

[Claims] 1. A low-friction treating agent for seat belts, comprising a polyether compound having an average molecular weight of 1,000 to 3,000. 2. The polyether compound has a viscosity of 1000.
The low friction treating agent for a seat belt according to claim 1, wherein the treating agent has a viscosity of up to 3000 centistokes. 3. The low friction treating agent for a seat belt according to claim 1, wherein the polyether compound accounts for 30% by weight or more of the entire treating agent. 4. A low-friction treating agent for seat belts, comprising a polyether compound having an average molecular weight of 1,000 to 3,000, and a silicone compound and / or an extreme pressure agent component. 5. The seat belt according to claim 1, wherein the treating agent is a treatment agent applied to a seat belt yarn and / or a seat belt webbing made of polyester fiber. Friction treatment agent. 6. A 1 to 20% by weight aqueous emulsion containing the low friction treating agent according to claim 1 as an active ingredient and having a surface tension at 25 ° C. of 35 dynes. / Cm or less, and a low friction treatment liquid for a seat belt, wherein the permeability at 25 ° C. by the Campus method is 15 seconds or less. 7. A seat belt wherein the friction reducing agent according to any one of claims 1 to 6 is attached in an amount of 0.05 to 5.0% by weight based on the weight of the fiber. Raw yarn.