JP2000248469A - Webbing for sheet belt and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain webbing for sheet belts, capable of smoothly drawing out and storing sheet belts, in which smooth drawing out and storage are retained also after repeatedly used, namely webbing for sheet belts excellent in storage property and storage durability and provide a method for effectively producing the webbing. SOLUTION: This webbing for sheet belts comprises applying a treating agent containing 0.05-1.50 wt.% dibasic acid ester component [I] having 500-800 molecular weight, 0.02-0.60 wt.% castor oil ethylene oxide adduct and/or hardened castor oil ethylene oxide adduct component [II] having 1,300-2,500 molecular weight and 0.01-0.30 wt.% sorbitan triester ethylene oxide adduct component [III] having 1,300-2,500 molecular weight as main active ingredients to the surface of a synthetic fiber multifilament.

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, a webbing for a seatbelt that can smoothly pull out and store the seatbelt and retains the smooth pullout and storage even after repeated use, that is, a seatbelt with excellent storage and storage durability The present invention relates to a webbing for use and an efficient manufacturing method thereof.

[0002]

2. Description of the Related Art Seat belts have become increasingly important in recent years as protection devices for occupants in vehicles.
There is a strong demand for not only the required performance as a safety device but also a comfortable wearing feeling and an improved convenience at the time of wearing so that the occupant can surely wear the seat belt.

In particular, convenience at the time of wearing is an important factor when an occupant wears a seat belt. The convenience of wearing the seatbelt is that the webbing can be pulled out of the retractor without any resistance when trying to fasten the seatbelt, and the webbing is instantly retracted at a moderate speed when the seatbelt is detached. Need to be stored in

[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. The drawback resistance and the storage resistance have been reduced by lowering the surface frictional resistance, and the device has been devised to make it easy to pull out from the retractor and store it in the retractor.

[0005] Here, it has been already confirmed that uncoated webbing, that is, webbing to which no resin or treating agent is applied, is excellent in durability against repeated withdrawal and storage, although the initial slipperiness is not good. . In this case, the initial storage property is covered by, for example, increasing the storage tension of the retractor, and a design that makes use of the good storage durability has been designed. However, in this technique, since the retracting tension of the retractor must be increased, there is a problem that the comfort is inferior, such as giving a sense of resistance when the webbing is pulled out and giving a feeling of pressure to the occupant even when the webbing is worn. Was.

Therefore, a method of reducing the frictional resistance of the webbing has been intensively studied. For that purpose, the most commonly used method is a method of weaving and dyeing a webbing and then applying a resin coat to the webbing. It is.

For example, Japanese Patent Publication No. 4-66948 discloses that a webbing is provided with a resin containing a urethane prepolymer block compound as a main component and then subjected to a heat treatment to cause a cross-linking reaction. The resin-coated webbing using this technique as a main example has been put to practical use as satisfying comfortable drawability and storage property.

However, if the webbing with the resin coating is repeatedly pulled out and stored, the friction between the webbing and the retractor bracket causes the coating resin to be worn and peeled off. At the same time, the peeled resin adheres to the retractor fittings, and as a result, it is difficult to smoothly pull out or store the resin, and as a result, a problem often occurs that the webbing is not stored in the retractor.

Further, in order to solve the above-mentioned problem, there has been proposed a technique of treating webbing with a relatively high-molecular-weight, low-friction treating agent instead of a resin coat. For example, JP-A-10-37075 discloses that the average molecular weight is 600 to 600.
The webbing is treated with a seat belt low friction treating agent containing a polyether ester of 6000 polytetramethylene glycol, a dibasic acid and a monovalent fatty acid, and having an average molecular weight of 2000 to 15000. A method is disclosed, and it is stated that the webbing for a seat belt obtained by this method satisfies both storage stability and storage durability.

[0010] The webbing treated with a relatively high-molecular weight low-friction treating agent, which mainly uses the above technology, has improved storage durability compared to conventional resin-coated webbing. Confirmed as a result of testing. However, in recent years, the level of customer's demand for the storage durability of the seatbelt has been further increased, and the fact is that the application of the above technology has not yet achieved sufficient satisfaction.

[0011]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned drawbacks of the prior art resin coated belt, and to further expand the effect of the technology of treating with a relatively high molecular weight low friction treatment agent. It is an object of the present invention to provide a webbing for a seat belt in which the storage durability is significantly improved while maintaining the initial sliding property, that is, the storage property.

The present inventors have conducted intensive studies in order to achieve the above object, and as a result, by combining the idea of the above-mentioned relatively high molecular weight low friction treating agent technology with the knowledge of uncoated webbing, a novel treatment has been achieved. The present inventors have found an agent, and thereby have completed a webbing for a seatbelt whose storability and storage durability have been remarkably improved, and a method for efficiently manufacturing the same.

[0013]

In order to achieve the above object, a webbing for a seat belt according to the present invention comprises a synthetic fiber multifilament having a dibasic acid ester component [I] having a molecular weight of 500 to 800, a molecular weight of 1300 ~ 2500
And / or a hardened castor oil ethylene oxide adduct component [II] and a sorbitan triester ethylene oxide adduct component [III] having a molecular weight of 1300 to 2500 as main active ingredients. A webbing for a seat belt, wherein the component [I] is contained in an amount of 0.0
5 to 1.50% by weight, when the content of the component [II] is 0.02 to 0.
60% by weight, and 0.01 to 0.30% by weight of the component [III] are provided.

In the webbing for a seat belt of the present invention, the following conditions (1) to (3) are desirable conditions, and by applying these conditions, it is expected that a more excellent effect can be obtained. it can. (1) The total amount of the components [I], [II] and [III], which are the main active components of the treatment agent, with respect to the webbing is 0.1 to 2.0% by weight. (2) In the treatment agent, the component [I] accounts for 20 to 70% by weight of the main active ingredient, the component [II] accounts for 20 to 30% by weight of the main active ingredient, and the component [III].
Occupy 10 to 15% by weight. (3) The synthetic fiber multifilament has a strength of 8.5.
g / d or more, elongation of 10% or more, and monofilament fineness of 3 to 30 d.

In the method for producing a webbing for a seat belt according to the present invention, the treatment agent is applied to a synthetic fiber in a synthetic fiber multifilament spinning step, and then the webbing is woven or the webbing is woven from the synthetic fiber multifilament. Thereafter, the treatment agent is applied to the webbing.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail. First, the treatment agent applied to the webbing for a seat belt of the present invention will be described.

The treating agent used in the present invention has a molecular weight of 500
~ 800 dibasic acid ester component [I], molecular weight 130
0-2500 castor oil ethylene oxide adduct and / or hydrogenated castor oil ethylene oxide adduct component [II] and sorbitan triester ethylene oxide adduct component [III] having a molecular weight of 1300-2500 as main active ingredients. is there.

Specific examples of the dibasic acid ester of the component [I] include dioleyl adipate, dioleyl thiodipropionate, isostearyl adipate, and isostearyl thiodipropionate.

The dibasic acid ester of the component [I] has a molecular weight of 500 to 800, preferably 610 to 780.
When the molecular weight is less than 500, the viscosity of the oil film is low, and the slipperiness after abrasion is deteriorated. On the other hand, when the molecular weight is more than 800, the friction is increased and the initial slipperiness is deteriorated. No effect.

The dibasic acid ester of the above component [I] preferably accounts for 20 to 70% by weight of the main active ingredient of the treating agent, from the viewpoint of improving the slip property of the seat belt and the slip property after abrasion. These dibasic acid esters may be used alone or in combination of two or more.

The amount of the dibasic acid ester of the component [I] adhered to the webbing is 0.05 to 1.50% by weight.
Preferably, it is in the range of 0.06 to 1.30% by weight. If the amount of the component [I] adhered to the webbing is less than 0.05% by weight, the effect of increasing the oil film strength is difficult to sufficiently exert. On the other hand, if it exceeds 1.50% by weight, the viscosity rise becomes large and the slipperiness increases. There is a problem that gets worse.

The castor oil ethylene oxide adduct and / or the hydrogenated castor oil ethylene oxide adduct component of the above-mentioned component [II] have a molecular weight of 1300 to 25.
When the molecular weight is less than 1300, the solubility is poor. On the other hand, when the molecular weight is more than 2500, the friction is increased and the initial slip property is deteriorated. No effect.

The castor oil ethylene oxide adduct and / or the hardened castor oil ethylene oxide adduct component of the above-mentioned component [II] are used as a treating agent in view of improving the slip property of the seat belt and the slip property after abrasion. It preferably accounts for 20 to 30% by weight of the main active ingredient. The amount of the component [II] adhering to the castor oil ethylene oxide adduct and / or the hardened castor oil ethylene oxide adduct is 0.02 to 0.60% by weight, preferably 0.03 to 0.50% by weight. In the range. 0.02% by weight of the component [II] of the castor oil ethylene oxide adduct and / or the hardened castor oil ethylene oxide adduct to the webbing.
If the amount is less than the above, it is difficult to sufficiently exert the effect of increasing the oil film strength. On the other hand, if it exceeds 0.60% by weight, there is a problem that the increase in the viscosity is large and the slipperiness is deteriorated.

Further, in the sorbitan triester ethylene oxide adduct component of the above-mentioned component [III], specific examples of the monovalent fatty acid esterifying sorbitan include oleic acid, stearic acid, isostearic acid, palmitic acid, and lauric acid. Oleic acid and isostearic acid are preferably used.

The molecular weight of the sorbitan triester ethylene oxide adduct of the above component [III] is 1300
２2500, preferably 1350-2450. If the molecular weight of this component is less than 1300,
When the solubility of the treating agent becomes poor, and when it exceeds 2500,
The friction becomes high, the initial slip property becomes poor, and the desired effect cannot be obtained.

From the viewpoint of improving the solubility of the treating agent, the sorbitan triester ethylene oxide adduct component of the above-mentioned component [III] is 10 to 1 of the main active ingredients of the treating agent.
It preferably accounts for 5% by weight. In addition, the above component [II
The adsorbed amount of the sorbitan triester ethylene oxide adduct component [I] to the webbing is 0.01 to 0.3.
0% by weight, preferably in the range of 0.02 to 0.25% by weight. If the amount of the component [III] sorbitan triester ethylene oxide adduct added to the webbing is less than 0.01% by weight, the desired effect of the treating agent cannot be obtained. And the initial slip property deteriorates.

The treating agent used in the present invention comprises, in addition to the above components [I], [II] and [III], an extreme pressure agent component and P
Other additives such as an H adjuster, an antioxidant, and an ultraviolet absorber may be added as necessary.

When the above-mentioned pH adjuster is blended, its proportion is preferably in the range of 0.02 to 10% by weight, particularly 0.03 to 8% by weight, based on the whole treating agent. When other additives are blended, their proportion is preferably in the range of 0.02 to 10% by weight, particularly 0.03 to 8% by weight, based on the whole treating agent.

The treating agent used in the present invention is preferably used in the treatment of seat belt webbing as an aqueous emulsion having a concentration of 1 to 20% by weight. If the adhesion to the seat belt webbing and the permeability are not impaired, it may be used as a higher-concentration aqueous emulsion liquid, or may be used as a treatment liquid diluted with an organic solvent. Particularly preferably, an aqueous emulsion having a concentration of 2 to 10% by weight is used.

When the above-mentioned treating agent is used as a treating solution of an aqueous emulsion having a concentration of 1 to 20% by weight, the treating solution has a surface tension at 25 ° C. of 35 dynes / cm or less.
It is preferable that the campus permeability at 5 ° C. is 15 seconds or less for adhesion to the seat belt webbing and penetration into the inside of the webbing. If the surface tension exceeds 35 dynes / cm, the adhesion to the webbing tends to be insufficient, and if the canvas permeability exceeds 15 seconds, the permeability of the treatment agent tends to deteriorate.
It is not preferable to increase the durability of the storage property.

Since the treating agent having the above-described structure has much higher permeability than the conventional resin coat, it has a large penetration into the webbing, and the treating agent is applied to the surface of the seat belt webbing. In addition, the surface of the filament inside the belt constituting the belt can be coated uniformly. Therefore, a resin layer and a belt (fiber) like a conventional seat belt in which only the belt surface is resin-coated
Since it does not have a two-layer structure, even if the fibers on the belt surface are scraped off over a long period of use, the processing agent adheres to the inner fibers and has low friction, so high storage properties can be achieved. A seatbelt that can be maintained and has a high abrasion resistance retention rate of storage stability can be obtained.

Next, the synthetic fiber multifilament constituting the webbing for a seat belt of the present invention will be described. For the protection of occupants, the yarn of the seatbelt webbing must have high strength to withstand the impact of a vehicle collision and high elongation to absorb energy at the time of collision. is important.

Therefore, the synthetic fiber multifilament used in the present invention is made of polyester fiber represented by polyethylene terephthalate, having a strength of 8.5 g / d or more, an elongation of 10% or more, and a single fiber fineness of 3 to 30 d. Is preferably used.

By setting the fineness of each single fiber in the synthetic fiber multifilament to the above range, the abrasion resistance of the obtained webbing for a seat belt can be improved, and the effect of improving rigidity is large. The weaving property of the webbing is not reduced.

Next, a method for manufacturing the webbing for a seat belt of the present invention will be described. The webbing for a seat belt of the present invention may be obtained by weaving the webbing after applying the treating agent to the synthetic fiber in the synthetic fiber multifilament spinning step, or weaving the webbing from the synthetic fiber multifilament, and then applying the treating agent to the webbing. It is manufactured by giving.

Specifically, at an arbitrary stage after a processing solution such as an aqueous emulsion processing solution obtained by emulsifying the above-mentioned processing agent and weaving the yarn for a seat belt into a webbing, It can be manufactured by any method such as a method of infiltrating into the inside or a method of spraying a liquid onto the webbing surface. In particular, when the webbing is dyed, it is preferable to apply a treating agent after the dyeing.

That is, the webbing for a seatbelt of the present invention can be manufactured by applying the above-mentioned treating agent to either the manufacturing process of the original yarn or the webbing after dyeing. Can be used as it is, and since the above-mentioned treating agent can be obtained by combining a part of the existing treating agent components of the conventional fiber, it is possible to efficiently produce the webbing at a low cost.

From the viewpoint of improving the sliding property of the seat belt and the sliding property after abrasion, the amount of the treating agent effective component with respect to the synthetic fiber multifilament constituting the webbing is determined from the viewpoint of improving the sliding property of the seat belt and the sliding property after abrasion. 0.1-2.0% by weight, even 0.3-1.5% by weight
% By weight.

As described above, the treatment agent of the present invention can satisfy the desired properties required for the seat belt by being applied to the webbing. It can be used for seat belts without coating.

The reason why the webbing for a seatbelt of the present invention is remarkably excellent in slipperiness, particularly after being used for a long period of time, that is, excellent in storage durability as compared with the conventional seatbelt, is due to the following action mechanism. Conceivable.

That is, in the conventional seat belt, the slipperiness is improved by, for example, applying a resin containing a urethane prepolymer block compound as a main component to the belt (Japanese Patent Publication No. 4-66948). As described above, there is 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. Further, depending on the case, the resin that has been worn away and peeled may form a scum and may accumulate dirt on the worn portion, resulting in abnormal slipperiness.
Therefore, many attempts have been made to develop a resin having better wear resistance and to apply a relatively thick resin layer, but none of them has been sufficiently satisfactory.

On the other hand, in the present invention, the slip property of the individual filaments of the synthetic fiber multifilaments constituting the belt is imparted without depending on the slip property of the coating resin layer, and thereby the desired slip property is obtained. It is what we are trying to get.

The resin layer coated on the 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 part of the belt, and this can be confirmed by analyzing the surface material of the fiber obtained by decomposing the belt.

On the other hand, in the seat belt webbing of the present invention, the treating agent sufficiently penetrates not only on the belt surface but also on the innermost layer portion of the belt, and each filament of the multifilament constituting the innermost layer of the belt. It also adheres to the surface, and in this respect it is significantly different from conventional seat belts.

Therefore, the seatbelt webbing of the present invention having the above-described structure can be smoothly drawn out and stored as compared with the conventional seatbelt webbing, and can be smoothly drawn out even after repeated use. It is excellent in the storage property in which the storage is maintained and the storage durability.

[0046]

The present invention will be described more specifically with reference to the following examples. The methods for evaluating various characteristics used in the examples and the like are as follows. [Strength of elongation] Measured according to the method of JIS L 1017. [Friction Characteristics] (1) Fiber-to-fiber friction: A friction coefficient between fibers was measured for each of the warp and the weft obtained by disassembling the webbing for a seat belt using a radar type friction meter. The smaller the coefficient of friction, the better the slipperiness between fibers. (2) Friction between fiber and metal: For each of the warp and weft obtained by disassembling the webbing of the seat belt, the friction coefficient between the fiber and the metal was measured using a Toray's type load micron device. The running speed of the fiber is 0.5 m /
And 300 m / min. The coefficient of friction obtained by the former method indicates the film strength of the treating agent covering the surface of the fiber. The coefficient of friction obtained by the latter method represents the smoothness of the fiber surface. The smaller the two friction coefficients are at the same time, the better the slipperiness is. [Surface tension of treatment agent solution (dyne / cm)] Using a CBV-A3 type automatic surface tensiometer manufactured by Kyowa Interface Science Co., Ltd., 2
At 5 ° C., the surface tension (dynes / cm) of the treating agent solution was measured. [Permeability of treatment agent solution (second)] A treatment agent solution is put into a 100 cc beaker, and the temperature is controlled in a constant temperature bath at 25 ° C. for 15 minutes. Then, a 2 cm × 2 cm size 3 mm thick wool felt is applied to the liquid surface. It floated gently, and the time (second) until it settled in the liquid was measured. The measurement was performed five times, and the average value was obtained. [Sliding friction with through (%)] A load of 500 g is set at one end of the seat belt webbing, an intermediate portion thereof is passed through the through, and a 10 kg load cell at an angle of 20 ° is set at the other end. The tension (F1) when the load is raised by the load cell and the tension (F1) when the load is returned to the base.
2) was measured, and the value of the square root of (F2 / F1) × 100 was defined as the sliding friction (%). The higher the value of the sliding friction, the smaller the frictional force and the better the sliding property and the storage property. [Sliding friction after abrasion (%)] The seat belt webbing was rubbed reciprocally 500 times under a load of 400 g using sandpaper (No. 500) as a friction body to abrasion the belt surface. After the abrasion, the sliding friction with the through was measured by the same method as the sliding friction with the through, and the sliding friction (%) after the abrasion was determined. [Hex bar wear retention (%)] Wear resistance test method (JIS-
4606). The strength of the seat belt webbing after 5,000 times of abrasion was measured, and the strength before abrasion and the strength after abrasion were measured to determine the strength retention.

(Examples 1-3 and Comparative Examples 1-5) Polyethylene terephthalate was melt spun and the spinning speed was 500
m / min, then apply 0.8% by weight of a usual spinning oil, and without heat, successively stretch by two steps using a hot roller at 245 ° C to a total draw ratio of 5 times. And then wound up at 3000 m / min, strength 9.1 g
/ D, an elongation of 13.5%, and a single-fiber fineness of 10.4 d were produced. Using the obtained polyester multifilament, weaving is carried out by a usual method to produce a seat belt webbing, dyed black by a usual method, and further 5% by weight of a treating agent having the composition shown in Table 1 Immersed in a water emulsion solution of
After adhering 0.5% by weight of the treating agent based on the total weight of the fiber of the webbing, the composition was preliminarily dried at 110 ° C. for 3 minutes and then heat-treated at 150 ° C. for 3 minutes.

Table 1 shows a list of processing agent components.
Each symbol of this treating agent component represents the compound shown below. A1 to A3 are the above components [I], B1 to B5 are the above components [II], C1 to C4 are the above components [III], and D1 to D2 are other additive components. H1 is a polyetherester treating agent, and R1 and R2 are resin components used in a conventional resin coat.

[0049]

[Table 1] [Details of Abbreviations of Each Treatment Agent Component Shown in Table 1] A1: Dioleyl adipate (molecular weight: 622) A2: Dioleyl thiodipropionate (molecular weight: 65)
4) A3: 2 ethylhexyl stearate (molecular weight: 39
6) B1: Hardened castor oil ethylene oxide adduct (molecular weight: 2000) B2: Hardened castor oil ethylene oxide adduct (molecular weight: 1400) B3: Castor oil ethylene oxide adduct (molecular weight: 1)
700) B4: hydrogenated castor oil ethylene oxide adduct (molecular weight: 1000) B5: hydrogenated castor oil ethylene oxide adduct (molecular weight: 5000) C1: sorbitan triolate ethylene oxide adduct (molecular weight: 2000) C2: sorbitan triisostea Rate ethylene oxide adduct (molecular weight: 220
0) C3: sorbitan trioleate ethylene oxide adduct (molecular weight: 1000) C4: sorbitan triisostearate ethylene oxide adduct (molecular weight: 500)
0) D1: Stearylamine ethylene oxide adduct (molecular weight: 900) D2: Oleyl phosphate Na salt H1: Polytetramethylene glycol (2000) and adipic oleate R1: Pdroxy-containing silicon, urethane prepolymer block compound Resin R3: Methylol Melamine Resin Table 2 shows the characteristic evaluation results of the webbings for seat belts thus obtained.

[0050]

[Table 2] As is clear from the results in Table 2, Example 1 according to the present invention was used.
In the case of No. 4 to 4, the friction characteristics of the fibers constituting the seat belt are low, the slip property between the seat belt and the through is good, and the slip property between the seat belt and the through hardly decreases even after being worn. Excellent in storage, and its durability. Furthermore, the durability due to hexagonal rod wear was excellent.

(Example 4) Before spinning, stretching and winding under the same conditions as those in Examples 1-3, a 20% by weight aqueous emulsion of the treating agent (a) shown in Table 1 was applied to an oiling roller. 0.5% by weight in terms of the amount of active ingredient
Winding was performed at 00 m / min to produce a polyester multifilament seat belt fiber having 1500 denier 144 filaments, a strength of 9.1 g / d, an elongation of 13.5%, and a single fiber fineness of 10.4 d. Using the obtained polyester filament fiber, weaving was carried out in a usual manner and dyed black by a usual way. Table 2 also shows the characteristic evaluation results of the webbing for a seat belt obtained.

In the case of Comparative Examples 1 to 3 which were treated with a treatment agent different from the present invention, and in the case of Comparative Examples 4 and 5 where a conventional coating resin was used, the slipperiness between the seat belt and the through was good. The more the wear, the worse the slippage due to wear, the unsatisfactory slipperiness after wear, and the poor durability due to hexagonal bar wear.

[0053]

The webbing for a seat belt of the present invention is
Compared with the conventional webbing for seat belts, it can be smoothly drawn out and stored, and even after repeated use over a long period of time, it can be smoothly drawn out and stored. .

Further, according to the method of manufacturing a webbing for a seat belt of the present invention, the webbing can be manufactured by applying the above-mentioned treating agent to either the manufacturing process of the original yarn or the webbing after dyeing. Since the conventional manufacturing process can be used as it is, and the above-mentioned processing agent can be obtained by combining some of the existing processing agent components of the conventional fiber, it is possible to efficiently manufacture the webbing at a low cost. is there.

Continued on the front page F term (reference) 3D018 BA01 4L033 AA04 AA07 AB01 AB05 AC08 AC15 BA39 CA48 4L048 AA20 AA21 AA48 AA49 AA56 AB07 AC09 AC10 AC17 CA01 CA09 DA26 EB00

Claims (6)

[Claims] 1. The surface of a synthetic fiber multifilament,
A dibasic acid ester component [I] having a molecular weight of 500 to 800,
Castor oil ethylene oxide adduct and / or hydrogenated castor oil ethylene oxide adduct component [II] having a molecular weight of 1300 to 2500 and a molecular weight of 1300 to 2500
A webbing for a seat belt provided with a treating agent having a sorbitan triester ethylene oxide adduct component [III] as a main active ingredient, wherein the component [I] is added in an amount of 0.05 to 1.50 wt. %, The component [II] is 0.02 to 0.60% by weight, the component [II]
I] of 0.01 to 0.30% by weight, respectively. 2. The total amount of the component [I], the component [II] and the component [III], which are main active ingredients of the treatment agent, with respect to the webbing is 0.1 to 2.0% by weight. The webbing for a seat belt according to claim 1, wherein 3. In the treatment agent, the component [I] accounts for 20 to 70% by weight of the main active ingredient, and the component [I]
The webbing for a seat belt according to claim 1 or 2, wherein [I] accounts for 20 to 30% by weight of the main active ingredient and 10 to 15% by weight of the component [III]. 4. The synthetic fiber multifilament has a strength of 8.5 g / d or more, an elongation of 10% or more, and a single fiber fineness of 3 to 3.
The webbing for a seat belt according to any one of claims 1 to 3, wherein the webbing is made of 30d polyester fiber. 5. A method for manufacturing a webbing for a seat belt, comprising: weaving a webbing after applying the treating agent to a synthetic fiber in a synthetic fiber multifilament spinning process. 6. A method for producing a webbing for a seat belt, comprising: weaving a webbing from a synthetic fiber multifilament; and applying the treatment agent to the webbing.