JP2002242076A - Webbing for seat belt having improvede storage durability - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a webbing for seat belt carrying out a smooth drawing out and storing and capable of carrying out a smooth drawing out and storing even after repeated use, excellent in storing properties and storage durability. SOLUTION: This webbing for seat belt obtained by weaving a polyester filament yarn includes a polyester compound including phosphorus and a polymeric adhesive adhering thereon.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a webbing for a seat belt and a method for manufacturing the same. More specifically, the present invention relates to a webbing for a seatbelt that retains smooth pull-out and storage properties even after repeated use, that is, a webbing for a seatbelt excellent in storage durability and a method of manufacturing the same.

[0002]

2. Description of the Related Art Seat belts have become increasingly important as protection devices for occupants in automobiles in recent years. Not only have the required performance as safety devices been improved, but also occupants can surely fasten their seat belts. Therefore, there is a strong demand for a comfortable wearing feeling and an improvement in convenience at the time of wearing.

[0003] In particular, the convenience at the time of wearing the seat belt is an important factor when the occupant wears the seat belt. It is necessary that the webbing can be pulled out without any trouble and that the webbing be stored in the retractor instantaneously at an appropriate speed when the seat belt is detached.

[0004] Therefore, in order to improve the smooth pull-out and storage when the seat belt is attached and detached, the retractor is provided with appropriate pulling-out resistance and storage force, and the webbing is provided with a webbing. By lowering the surface frictional resistance, the pullout resistance and the storage resistance are reduced, and a method of smoothly pulling out and retracting from the retractor is performed.

[0005] The most commonly used methods are weaving and dyeing webbing, followed by silicone resin, acrylic silicone copolymer resin, urethane silicone copolymer resin,
This is a method of improving slip by treating with polyethylene wax or the like.

For example, Japanese Patent Publication No. 4-66948 discloses a method in which a resin containing a urethane prepolymer block compound containing an organosiloxane segment as a main component is applied to webbing, followed by heat treatment to cause a crosslinking reaction. Discloses a method for obtaining a webbing having good slipperiness.

JP-A-10-37075 discloses an ester compound comprising polytetramethylene glycol having an average molecular weight of 600 to 6000, a dibasic acid and a monovalent fatty acid, and having an average molecular weight of 2000 to 15 , 0
A method for applying a treating agent containing a polyetherester of No. 00 is disclosed.

By applying these methods, the pull-out and storage of the webbing for the initial seat belt can be improved.
If the product is used repeatedly for a long period of time, the resin on the surface will be scraped off due to repeated rubbing with the through ring (made of nylon resin), which is a guide for getting in and out of the seat belt, and it will fall off, causing scum to adhere, sand and dust, etc. Due to the attachment of inorganic and organic stains, the drawability and the storage property of the storage medium significantly decrease over time, and as a result, it becomes difficult to smoothly draw out and store, and eventually the webbing is not stored in the retractor. The reality is that it often occurs and is not yet satisfactory.

[0009]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned drawbacks of the conventional webbing for a seatbelt, and has a significantly improved storage durability while maintaining the initial sliding property, that is, the storage property. The purpose is to provide webbing.

[0010]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to achieve the above object, and as a result, when a phosphorus-containing polyester compound is fixed to a webbing for a seat belt, a desired webbing for a seat belt can be obtained. Was determined.

Thus, according to the present invention, there is provided a webbing for a seat belt formed by weaving a polyester filament yarn, wherein a phosphorus-containing polyester compound and a polymer adhesive are fixed to the webbing. Webbing for seat belts, with improved storage durability
And a method of manufacturing a webbing for a seatbelt with improved storage durability, wherein a phosphorus-containing polyester compound and a polymer adhesive are fixed to a webbing for a seatbelt obtained by weaving polyester filament yarn. .

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.

The webbing for a seat belt in the present invention is a webbing for a seat belt formed by weaving a polyester filament yarn such as polyethylene terephthalate, and the polyester filament yarn is a polyester web within a range that does not impair the object of the present invention. It may be a mixed yarn with another synthetic fiber filament including a filament. Furthermore, the above-mentioned polyester may be copolymerized with the third component, and may contain various functional agents and additives, as long as the object of the present invention is not impaired.

Preferred examples of the phosphorus-containing polyester compound used in the present invention include a phosphorus-containing polyester compound comprising a phosphinic acid derivative and an aromatic dicarboxylic acid or a lower alkyl ester thereof and a diol.

The above-mentioned phosphorus-containing polyester compounds have hitherto been used mainly for imparting flame retardancy to polyester fabrics, and include phosphinic acids or derivatives thereof, aromatic dicarboxylic acids or lower alkyl esters thereof, and diols. The components can be produced by a dehydration or dealcoholization reaction by a known method.
At that time, the respective molar ratios are not particularly limited. Also,
The weight average molecular weight of the obtained phosphorus-containing polyester compound is preferably in the range of 1500 to 20,000, more preferably in the range of 5000 to 15000.

If the average molecular weight is less than 1500, the durability becomes insufficient. On the other hand, if it exceeds 20,000, the solubility deteriorates, which is not preferable.

Here, the phosphinic acid derivative is preferably exemplified by a phosphinic acid derivative represented by the following formula (1) or (2), and specifically, compounds represented by the following formulas (3) to (6) Is exemplified.

[0018]

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In the above formula, R ¹ is a hydrogen atom, having 1 to 4 carbon atoms.
Or a group represented by (—R ² O) _r H. Here, R ² represents an ethylene, propylene or butylene group, and r represents an integer of 1 to 10. R ³ and R ^{4 each} represent a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, which may be the same or different. k and m each represent an integer of 0 to 4, and n represents an integer of 0 to 2.

[0020]

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In the above formula, R ⁵ and R ⁶ represent a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, which may be the same or different. k and m are each an integer of 0 to 4;
Represents an integer of ２2.

[0022]

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[0023]

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[0024]

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[0025]

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Examples of the aromatic dicarboxylic acid or its lower alkyl ester include terephthalic acid, isophthalic acid, and naphthalenedicarboxylic acid, and the lower alkyl ester includes an alkyl ester having 1 to 4 carbon atoms. . Particularly preferred are terephthalic acid and its dimethyl ester.

Examples of the diol component include alkylene glycols, polyoxyalkylene glycols, alkylene oxide adducts of alkylene glycols, and alkylene oxide adducts of divalent aromatic hydroxy compounds represented by bisphenol A. Of these, alkylene glycol is particularly preferable, and a linear or branched alkylene glycol having 2 to 10 carbon atoms is more preferable, and ethylene glycol is particularly preferable. These diol components are:
It is also possible to use two or more kinds in combination.

The molecular weight of the diol component is not particularly limited, but it is preferable to use one having a molecular weight of 1,000 or less. When the molecular weight exceeds 1,000, the phosphorus content is reduced, and the abrasion may be reduced.

As the organic solvent used in the above reaction,
Aromatic hydrocarbons such as toluene, xylene and alkylnaphthalene; ketones such as acetone and methyl ethyl ketone; ethers such as dioxane and ethyl cellosolve; amides such as dimethylformamide; sulfoxides such as dimethyl sulfoxide; methylene chloride; And these organic solvents may be used alone or
It may be used as a mixture of two or more kinds.

Examples of the polymer adhesive used in the present invention include urethane resins, acrylate resins, and water-soluble polyester resins. In particular, polyurethane resins have an adhesive property to polyester fibers, a hardness of a film, It is preferable in terms of adhesion durability and the like.

As the polyurethane resin, a conventionally known polymer dissolved or dispersed in a solvent or water can be used. For example, a polyurethane obtained by the reaction of an organic diisocyanate with a long-chain diol and a chain extender is typical. As the polyester diol, polyether diol, polyamide ester diol, polycarbonate diol,
As the chain extender, a compound containing two active hydrogens such as a low molecular alcohol, a low molecular diamine, and a low molecular amino alcohol can be used.

As the crosslinking agent for the polyurethane resin,
Examples thereof include aromatic isocyanates such as xylene diisocyanate, tolylene diisocyanate, and diphenylmethane diisocyanate, and aliphatic isocyanates such as hexamethylene diisocyanate.

In the present invention, the phosphorus-containing polyester compound and the polymer adhesive are fixed to the webbing for a seat belt, and the compounding ratio at that time is from 20:80.
A range of 60:40 is preferred, more preferably 30: 7.
0 to 5:50.

If the compounding ratio of the phosphorus-containing polyester compound is larger than the above range, the texture becomes coarse and hard, and the storability of the webbing decreases. On the other hand, if the compounding ratio of the phosphorus-containing polyester compound is less than the above range, it is too soft to obtain a desired hardness.

As a method for fixing the above-mentioned phosphorus-containing polyester compound and the polymer adhesive to the webbing for a seat belt, the cloth is immersed in a compounding solution having a predetermined concentration and then squeezed with a mangle, or the treatment liquid is sprayed onto the cloth. A known method such as coating or coating with a kiss roller or the like can be employed. After applying the treatment liquid, 8
The drying heat treatment is performed at 0 ° C. or more, preferably at 110 to 180 ° C.

The amount of the phosphorus-containing polyester compound and the polymer adhesive fixed to the webbing is preferably 0.2 to 1.5% by weight, more preferably 0.3 to 0.8% by weight of the webbing. %. If the amount of fixation is too small, the smoothness will be poor. On the other hand, if the amount is too large, the texture becomes coarse or hard, and scum is generated due to wear, which is not preferable.

In the present invention, a low friction treating agent composed of a silicone resin may be further fixed to the webbing for a seat belt. Here, as the silicone resin, a compound having a dialkylpolysiloxane skeleton called a silicone oil is exemplified. Generally, dimethylpolysiloxane and its glycol-modified silicone are used, and the silicone skeleton is dimethylpolysiloxane. The unit is preferably a unit, an amino-modified dimethylpolysiloxane unit, a carboxy-modified dimethylpolysiloxane unit, or an epoxy-modified polysiloxane unit, and examples thereof include monomer, oligomer, and polymer types. In addition, a copolymer type of silicone and acrylate is also included.

The compounding ratio of the low friction treatment agent and the polymer adhesive is preferably 0.2 to 0.8, more preferably 0.3 to 0.6, based on 1 of the polymer adhesive. .

[0039]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, but it should not be construed that the invention is limited thereto.

In the examples and comparative examples, all parts are parts by weight in terms of solid content, and the performance values shown in the examples and comparative examples were measured by the following methods.

(1) Sliding friction with through A 500 g load is set on one end of the seat belt,
The middle part is inserted through the through, and a 10 kg load cell is set at the other end at an angle of 20 °. The force (F1) required to raise the load by the load cell and the force (F2) required to return the load to the load are measured, and the value of the square root of (F2 / F1) is defined as the sliding friction. The higher the value of the sliding friction, the smaller the friction characteristics and the better the storage property.

(2) Sliding friction after friction A sheet belt was subjected to a load of 400 g using a sandpaper (No. 500) as a friction material, and reciprocated on the belt surface by 5 g.
Rub 00 times. The sliding friction with the through after friction is measured by the same method as described above, and is defined as the sliding friction after friction.

Examples 1-4 and Comparative Examples 1-2 Polyethylene terephthalate was melt spun and the spinning speed was 500 m /
Minutes and then without being wound up, and subsequently, a total stretching ratio of 5 by a two-stage stretching method using a 245 ° C. hot roller.
After hot stretching twice, it is wound up at 3000 m / min and 166
A 7 dtex / 144 filament polyester filament yarn was produced.

The obtained polyester filament yarn is woven by a usual method to produce a seat belt webbing, and the webbing is dyed black by a usual thermosol dyeing method. It was immersed, squeezed with a mangle pick-up 20%, pre-dried at 110 ° C. for 3 minutes, and then heat-treated at 150 ° C. for 2 minutes.

Table 1 shows the sliding friction of the obtained webbing with the through of the seat belt and the sliding friction after the friction.

[0046]

[Table 1]

[0047]

According to the present invention, there is provided a seatbelt webbing which is smoothly drawn out and stored, and which can be smoothly drawn out and stored even after repeated use, and which is excellent in storability and storage durability. can get.

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Toshihiko Nishikawa 1-6-7 Minamihonmachi, Chuo-ku, Osaka-shi, Osaka Teijin Limited F-term (reference) 3D018 BA03 4L033 AA07 AC08 AC09 AC15 BA36 CA50 CA59 4L048 AA20 AB07 AC17 BA02 BB01 CA00 CA09 DA26

Claims (9)

[Claims] Claims 1. A webbing for a seat belt comprising a polyester filament yarn woven, wherein a phosphorus-containing polyester compound and a polymer adhesive are fixed to the webbing. Improved webbing for seat belts. 2. The webbing for a seat belt with improved storage durability according to claim 1, wherein a friction reducing agent made of a silicone resin is further fixed to the webbing. 3. The sheet with improved storage durability according to claim 1, wherein the phosphorus-containing polyester compound is a phosphorus-containing polyester compound comprising a phosphinic acid derivative and an aromatic dicarboxylic acid or a lower alkyl ester thereof and a diol. Webbing for belt. 4. The webbing for a seat belt with improved storage durability according to claim 3, wherein the phosphinic acid derivative is a phosphinic acid derivative represented by the following formula (1). Embedded image In the above formula, R ¹ represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms or a group represented by (—R ² O) _r H. Where R
² is an ethylene, propylene or butylene group, r is 1
Represents an integer of 10 to 10. R ³ and R ^{4 each} represent a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, which may be the same or different. k and m are each an integer of 0 to 4;
Represents an integer of 2. 5. The webbing for a seat belt with improved storage durability according to claim 3, wherein the phosphinic acid derivative is a phosphinic acid derivative represented by the following formula (2). Embedded image In the above formula, R ⁵ and R ⁶ represent a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, which may be the same or different. k and m each represent an integer of 0 to 4, and n represents an integer of 0 to 2. 6. The webbing for a seat belt according to claim 1, wherein the phosphorus-containing polyester compound has a weight-average molecular weight of 1500 to 20,000. 7. The webbing for a seat belt with improved storage durability according to claim 1, wherein the polymer adhesive is a polyurethane resin or a polyester resin. 8. The storage durability improvement according to claim 1, wherein the compounding ratio of the phosphorus-containing polyester compound and the polymer adhesive is in the range of 20:80 to 60:40 in solid content. Webbing for seat belts. 9. A method for producing a webbing for a seat belt with improved storage durability, wherein a phosphorus-containing polyester compound and a polymer adhesive are fixed to a webbing for a seat belt formed by weaving polyester filament yarn. .