JPH1037079A - Low friction treatment agent for seat belt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat belt having excellent storage stability, durability, abrasion resistance retention rate, and excellent storage stability at low temperatures by being applied to a seat belt webbing. Provided is a low friction treating agent for belts. SOLUTION: A seat belt webbing is provided with a friction reducing agent containing a polyether polyester having an average molecular weight of 2,000 to 15,000 and a silicone compound, and having a silicone compound content of 2 to 50% by weight. .

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 seat belt webbing. More specifically, the present invention relates to a low friction treatment agent for imparting webbing, which has a good seat belt storage property, can maintain good storage property even after abrasion, and is effective for obtaining a seat belt having excellent storage durability. is there.

[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.

Therefore, a main object of the present invention is to solve the above-mentioned problems in the prior art, and by applying the invention to a seat belt webbing, it is possible to sufficiently reduce the frictional characteristics of the fibers constituting the webbing. The slipperiness at the beginning of the seat belt is sufficiently high, and the characteristics such as the slipperiness can be maintained well after long-term use.
A seatbelt that can exhibit good slipperiness even at low temperatures such as below freezing, that is, a seatbelt that is excellent in storage stability, durability, wear resistance retention rate, and storage stability at low temperatures. An object of the present invention is to provide a low friction treating agent which can be obtained.

[0008]

In order to achieve the above object, a low friction treating agent for a seat belt according to the present invention is a low friction treating agent for applying a seat belt webbing, and has an average molecular weight of 2,000 to 15,000. Wherein the content of the silicone compound is 2 to 50% by weight.

The polyol constituting the polyether polyester has an average molecular weight of 600 to 6000 and is at least one of a polymer of ethylene oxide and / or propylene oxide and polytetramethylene glycol. Preferably, and
The polyether polyester is preferably an ester of a polyether diol compound, a dibasic acid and a monovalent fatty acid.

It is preferable that the compounding amount of the polyether polyester accounts for 30% by weight or more of the whole treating agent, and the silicone compound is used in an amount of 5 to 35% of the whole treating agent.
It is particularly preferable that the composition occupies the weight%, and it is further preferable that an extreme pressure component is also contained.

It is preferable that the treating agent is applied to the polyester fiber seat belt webbing. Furthermore, 1 to 20% by weight of the treating agent as an active ingredient
A water-based emulsion having a surface tension of 35 dynes / cm or less at 25 ° C. and a permeability of 15 seconds or less at 25 ° C. in the campus method for use as a low-friction treatment solution for seat belts. Is preferred.

As described above, the treating agent of the present invention contains a specific polyether polyester and has a high permeability. Therefore, when the treating agent is applied to the seat belt webbing, the treating agent is also applied to the surface of the seat belt and to the inside constituting the same. Can be coated uniformly on the surface of the filament. Therefore, unlike a conventional seat belt having a resin-coated surface, the belt does not have a two-layer structure of a resin layer and a belt (fiber) layer. Since the treating agent is sufficiently adhered to the internal fibers and has low friction, the seat belt can have a high storage stability and a high abrasion resistance retention rate.

Further, in the present invention, since a silicone compound which can maintain a liquid state even at a low temperature and has a good sliding property is used in combination, excellent sliding properties can be exhibited even when used at a low temperature.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION The polyether polyester used in the treating agent of the present invention is an esterified product of a diol compound of a polyether and a carboxylic acid, and has an average molecular weight of slipperiness and permeability into the interior of the webbing. For two
000 to 15000. If the average molecular weight is too small, less than 2000, the strength of the oil film becomes insufficient and the slipperiness after abrasion deteriorates, so that the desired effect cannot be obtained. On the other hand, if the molecular weight exceeds 15,000, the friction characteristics cannot be sufficiently improved, so that the slipperiness deteriorates and the desired effect cannot be obtained. The preferred average molecular weight is 3000-10000.

As the polyether polyester,
Both ends of the dibasic acid are esterified with a polyether as described below, and both ends are blocked by esterification with a monovalent fatty acid, such as a compound in which both ends are esterified with a monovalent fatty acid. Preferably, the polyether polyester is

The polyether component constituting the polyether polyester preferably has an average molecular weight of 600 to 6000, and includes a polymer of ethylene oxide and / or propylene oxide and polytetramethylene glycol. Methylene glycol is preferred. If the average molecular weight is too small, less than 600, the strength of the oil film becomes insufficient and the slipperiness tends to deteriorate. On the other hand, when the average molecular weight exceeds 6,000, the friction becomes too large and the slipperiness tends to deteriorate. The preferred average molecular weight is from 800 to 4000.

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

Further, examples of the dibasic acid component constituting the polyether polyester include maleic acid, adipic acid, thiodipropionic acid, sebacic acid and the like. Preferred are adipic acid, thiodipropionic acid and sebacic acid. Note that dibasic acids having a cyclic structure such as an aromatic ring are not preferred in terms of the effect of reducing friction, and aliphatic dicarboxylic acids are preferred.

Further, the monovalent fatty acid component includes octylic acid, lauric acid, myristic acid, palmitic acid,
Stearic acid, isostearic acid, oleic acid, ricinoleic acid, linoleic acid, linolenic acid, and the like. Preferably, lauric acid, isostearic acid, and oleic acid are good.

Further, the polyether polyester is preferably one that can maintain a liquid state at normal temperature (20 to 25 ° C.). This is because the seat belt to which the treatment agent has been applied can maintain a liquid state without becoming a paste under ordinary-temperature conditions in which it is used daily, and the function of low friction can be sufficiently exhibited during use.

The above-mentioned polyether polyester 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 intended effect of the polyether polyester is difficult to sufficiently exert, 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 silicone compound used in the treatment agent of the present invention has a viscosity at 25 ° C. of 100 to 1000.
Examples include dimethylpolysiloxane and methylphenylpolysiloxane having a viscosity of 0 centipoise, 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.

The above-mentioned silicone compound accounts for 2 parts of the whole treating agent.
５０50% by weight, preferably 5%.
~ 35% by weight. If the amount is less than 2% by weight, the effect of the addition of the silicone compound cannot be sufficiently exerted, so that the sliding characteristics at low temperatures (for example, below freezing points such as winter temperatures in extremely cold regions) cannot be satisfied. 5
If the amount is more than 0% by weight, the above-mentioned effects of the polyether polyester are not sufficiently exerted, and the oil film strength is weakened and the slipperiness after abrasion is deteriorated, so that it is difficult to obtain desired friction characteristics.

The friction reducing agent of the present invention contains a smoothing component (C), an extreme pressure agent component (D), a surfactant component (E) and the like other than the above-mentioned polyether polyester and silicone compound. Preferably, the total of their contents is at most 68% by weight.

As the leveling agent component (C), mineral oil (refined spindle oil, liquid paraffin), animal and vegetable oil (coconut oil, castor oil, etc.), fatty acid ester (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 proportion 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.

Examples of the surfactant (E) include alkylene oxide adducts of higher alcohols (ethylene propion oxide adducts of octyl alcohol, ethylene propion oxide adducts of stearyl alcohol, and ethylene oxide adducts of oleyl alcohol). ), 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 ratio 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 treatment agent of the present invention may further include a pH adjuster such as an alkali metal, 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 friction reducing agent of the present invention is preferably used in the form of an aqueous emulsion having a concentration of 1 to 20% by weight for the treatment of the seat belt webbing, but the adhesion and the permeability to the seat belt webbing are impaired. If not, it may be used in a more concentrated aqueous emulsion solution, may be used in the form of a stock solution without substantial dilution, or may be used as a treatment solution diluted with an organic solvent. 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. This is preferable for adhering to the webbing and penetrating into the inside thereof. If the surface tension exceeds 35 dynes / cm, the adhesion to the webbing tends to be insufficient. On the other hand, when 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,
At any stage after weaving the webbing for the seatbelt into webbing, the webbing may be applied by any method such as a method of immersing the webbing in a liquid or a method of spraying the liquid on the webbing surface. When the webbing is dyed, it is preferable to apply a low friction treating agent after the dyeing.

The amount of the treatment agent is 0.05 to 5.0, which is the amount of the effective component of the treatment agent with respect to the fibers constituting the webbing.
% By weight, preferably 0.1 to 1.5% by weight.

Such a low-friction treating agent of the present invention can satisfy desired low-friction characteristics required for a seat belt by being applied to webbing.
The treated seatbelt webbing can be used for a seatbelt without applying a conventional resin coat.

Furthermore, since the low friction treatment agent of the present invention has much better permeability than the conventional resin coat, it greatly penetrates into the inside of the webbing, and the treatment agent is applied to the surface of the seat belt webbing. In addition, it is possible to uniformly coat the surface of the filament inside the belt constituting the belt. 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 seat belt webbing to which the friction reducing agent of the present invention is applied include a seat belt webbing made of synthetic fibers such as polyester fibers.

The seatbelt obtained by applying the friction reducing agent for seatbelts of the present invention to a webbing is far superior to conventional seatbelts in terms of slipperiness, especially after long-term use, that is, storage durability. It is considered that the reason for the excellent property is 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 off may form a scum and accumulate, or a dirt 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 belt surface, 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 to the belt surface but also to the innermost layer of the belt, and to 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.

[0044]

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.

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 at 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 1-2 and Comparative Examples 1-3 Polyethylene terephthalate was melt spun and the spinning speed was 500 m
/ Min, followed by two-stage stretching using a hot roller at 245 ° C., followed by hot stretching at a total stretching ratio of 5 times, and then winding at 3000 m / min.
A raw yarn for a seat belt of polyester filament yarn of 0 denier 144 filaments was produced.

Using the obtained yarn for seat belt, weaving is carried out by a usual method to produce a seat belt webbing, dyed in black by a usual method, and further treated with 5 wt. % Water emulsion solution,
After adhering 0.5% by weight of a treating agent based on the total weight of the webbing, the composition was preliminarily dried at 110 ° C. for 3 minutes and then heat-treated at 150 ° C. for 3 minutes.

Each symbol of the treating agent component in Table 1 represents the compound shown below. A1 and A2 are polyether polyesters specified in the present invention, B1 and B2 are silicone compounds required in the present invention, C1 and C2 are other leveling agents (C), and D1 and D3 are extreme pressure. A surfactant component (D), wherein E1 to E3 are surfactant components (E)
It is. R1 and R2 are resin components used in a conventional resin coat.

A1. Ester of polytetramethylene glycol (2200) with thiodipropionic acid and isostearic acid (molecular weight 5000) A2. Ethylene oxide propylene oxide
Ester of copolymer, sebacic acid (1400) and isostearic acid (molecular weight 3500) B1..dimethylpolysiloxane (viscosity 350 centistokes) B2..Amino-modified silicon 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 (Molecular weight 1500) E2 ·· Oleyl alcohol EO adduct (Molecular weight 90
0) E3 ··· 10 moles of hydrogenated castor oil (EO) R1 ·· Resin containing hydroxy-containing silicon or urethane prepolymer-blocked product as main component R2 ·· Methylol-melamine resin

[0054]

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

Table 2 shows the results of evaluating the properties of the obtained seat belt.

[0056]

[Table 2]

As is clear from Table 2, in the case of Examples 1 and 2 according to the present invention, the slipperiness between the seat belt and the through is good, and the slip between the seat belt and the through is even after abrasion. The property was hardly reduced, and the storage property 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 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 provided, the slipperiness with the through was good. The higher the wear, the greater the deterioration of slippage due to wear, and in each case, the slipperiness after wear was unsatisfactory. further,
The durability due to hex bar wear was also poor.

[0059]

When the friction reducing agent for a seat belt of the present invention is applied to a seat belt webbing, the frictional properties of the fibers constituting the webbing can be sufficiently reduced and the initial slip property can be sufficiently improved. In addition, its properties such as slipperiness can be maintained well after long-term use, and good slipperiness can be exhibited even at low temperatures such as below freezing points, so that it has excellent storage stability and durability. A seat belt having an excellent wear resistance retention rate and an excellent storage property at low temperatures can be obtained.

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

Claims (8)

[Claims] 1. A low-friction treating agent for imparting a seat belt webbing, comprising an average molecular weight of 2,000 to 15,000.
Contains a polyether polyester and a silicone compound, and the content of the silicone compound is 2 to 50.
% By weight. 2. The polyether constituting the polyether polyester has an average molecular weight of 600 to 6000, and is at least one of a polymer of ethylene oxide and / or propylene oxide and polytetramethylene glycol. The low friction treating agent for a seat belt according to claim 1, wherein: 3. The low friction treatment for a seat belt according to claim 1, wherein the polyether polyester is an esterified product of a diol compound of a polyether, a dibasic acid and a monovalent fatty acid. Agent. 4. A low-friction treating agent for a seat belt according to claim 1, wherein the polyether polyester accounts for 30% by weight or more of the whole treating agent. 5. The method according to claim 1, wherein the silicone compound accounts for 5 to 35% by weight of the whole treating agent.
5. The low friction treating agent for a seat belt according to 2, 3, or 4. 6. A low-friction treating agent for imparting a seat belt webbing, which has an average molecular weight of 2,000 to 15,000.
A low friction treating agent for a seat belt, comprising a polyether polyester, a silicone compound, and an extreme pressure agent component, wherein the content of the silicone compound is 2 to 50% by weight. 7. The low-friction treating agent for a seat belt according to claim 1, which is a low-friction treating agent applied to a polyester fiber seat belt webbing. 8. A 1 to 20% by weight aqueous emulsion containing the low-friction treating agent according to claim 1 as an active ingredient, wherein the aqueous emulsion has 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.