JP2000290852A - Antimicrobial sheet belt webbing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an antimicrobial sheet belt webbing capable of controlling the growth of bacteria even under a high-temperature high-humidity condition and in a repeated use, excellent in hygiene by making warp include an antimicrobial synthetic yarn. SOLUTION: In this sheet belt webbing comprising warp and weft, at least the warp comprises >=30 wt.% of an antimicrobial synthetic yarn such as a synthetic yarn formulated with preferably 0.05-20 wt.% of an antimicrobial component such as silver ion supporting high silica mordenite type zeolite. Preferably, the antimicrobial synthetic yarn is composed of a spun-dyed yarn subjected to antimicrobial processing. The antimicrobial synthetic yarn is preferably produced from a polyester-based yarn having 200-2,000 denier fineness, >=5.0 g/d strength at break and >=10.0% elongation at break.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antibacterial seatbelt webbing for use in a vehicle or the like, and more particularly, to a webbing made of synthetic fiber for a seatbelt having antibacterial properties, in a high-temperature and high-humidity environment and repeatedly. The present invention relates to an antibacterial seatbelt webbing which is excellent in hygiene and can suppress bacterial growth even during use.

[0002]

2. Description of the Related Art In general, synthetic fibers such as polyester fibers and polyamide fibers having excellent dimensional stability, strength, chemical resistance, and heat resistance are used for three-point seat belt webbing used in front seats of passenger cars and the like. Have been.

[0003] However, although synthetic fibers are excellent in the above-mentioned properties, they have a drawback that they are easily absorbed in a high temperature and high humidity environment in a vehicle or when worn due to low hygroscopicity. However, there has been a problem that bacteria are easily propagated using these as a nutrient source.

Conventionally, various synthetic fibers having improved antibacterial properties have been developed. For example, Japanese Patent Application Laid-Open No. 3-249201 proposes an antibacterial sock to which a quaternary ammonium salt is added as an antibacterial component. Also, JP-A-8-170
No. 217 proposes an antibacterial fiber using a polylysine compound as an antibacterial component.

[0005] Many other antibacterial fibers are known, but most of them are for use in clothing, and a seat belt made of the antibacterial fiber has not yet been developed.

[0006]

SUMMARY OF THE INVENTION The present invention has been achieved as a result of studying to solve the problems in the prior art described above. Therefore, the object of the present invention is to
An object of the present invention is to provide a sanitary antibacterial seatbelt webbing that can suppress the growth of bacteria even in a high-temperature and high-humidity environment and during repeated use.

[0007]

In order to solve the above-mentioned problems, the antibacterial seat belt webbing of the present invention mainly has the following constitution. That is, an antibacterial seatbelt webbing in which at least a warp yarn contains antibacterial synthetic fibers in a seatbelt webbing composed of a warp and a weft.

[0008] In the antibacterial seat belt webbing of the present invention, the following conditions (1) to (9) are preferable conditions, and by applying these conditions, it is expected that a more excellent effect can be obtained. (1) The antibacterial synthetic fiber is composed of a synthetic fiber kneaded with an antibacterial component. (2) In (1), the antibacterial component is kneaded at 0.05 to 20% by weight based on the synthetic fiber. 30% synthetic synthetic fiber per seat belt webbing
(3) In (1) and (2), the antibacterial component is a high-silica mordenite-type zeolite carrying silver ions, and (4) the antibacterial synthetic fiber is an antibacterial component. (5) The antibacterial component is fixed to the surface of the seat belt webbing. (6) In (4) and (5), the antibacterial component is added to the synthetic fiber. 0.01
10% by weight to 10% by weight, and the antibacterial synthetic fiber is used in an amount of 30% by weight or more based on the seat belt webbing. (7) In (4) to (6), the antibacterial component is
Being a quaternary ammonium salt compound, (8) the antibacterial synthetic fiber is composed of an original yarn subjected to antibacterial processing,
(9) The antibacterial synthetic fiber is a polyester fiber having a fineness of 200 to 2000 denier, a breaking strength of 5.0 g / d or more, and a breaking elongation of 10.0% or more.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be specifically described below. The antibacterial seat belt webbing of the present invention only needs to contain antibacterial synthetic fibers in at least the warp of the webbing.

That is, in the seat belt webbing, the warp generally covers the surface of the webbing, and the weft is hidden inside the webbing. Therefore, in order to effectively exhibit antibacterial performance, it is preferable that the antibacterial synthetic fiber is used for the warp of webbing.

[0011] Examples of the synthetic fiber material polymer constituting the antibacterial seat belt webbing of the present invention include polyester and polyamide, and polyester is preferably used from the viewpoint of initial modulus and terminal modulus.

Among the polyesters, polyesters having ethylene terephthalate as a main repeating unit, ie, polyethylene terephthalate, are particularly preferably used. In the polyethylene terephthalate, a conventionally known acid component and glycol component may be copolymerized as long as the constitutional requirements and objects of the present invention are not impaired, and specific examples of the acid component include isophthalic acid and adipic acid. However, specific examples of the glycol component include tetramethylene glycol, 1,4-cyclohexanedimethanol, and polyethylene glycol.

In the antibacterial seatbelt webbing of the present invention, the antibacterial component used for constituting the antibacterial synthetic fiber is not particularly limited as long as it has antibacterial performance. Specific antibacterial components include silver-based inorganic compounds (silver ions) such as silver nitrate, copper-based compounds, quaternary ammonium salts such as benzalkonium chloride and benzenetonium chloride, chlorohexidine salts, phenylamide-based compounds, amidine groups, Examples include compounds having a guanidine group, compounds having a biguanide group, and polylysine compounds such as ε-poly-L-lysine. Of course, these compounds are merely examples, and compounds other than the above may be used.

Next, the method of imparting the antibacterial component to the antibacterial synthetic fiber used in the antibacterial seat belt webbing of the present invention is not particularly limited, and even if the antibacterial component is kneaded with the synthetic fiber. Alternatively, an antibacterial component may be added to a synthetic fiber or a seatbelt webbing by being added to a treating agent and fixed.

As a method of kneading the antibacterial component into the synthetic fiber, the antibacterial component is mixed with the polymer at the same time in the polymerization tank and polymerization is carried out with stirring to add the antibacterial component, or the antibacterial component is added when the polymer is melted. A method of kneading in a screw is exemplified.

However, in order to obtain uniform dispersibility in the synthetic fiber, it is preferable to prepare a masterbatch in which an antibacterial component is added to the resin in a high concentration in advance and knead it with the raw material pellets during spinning. .

Further, in order to obtain sufficient antibacterial performance, the antibacterial component is added to the synthetic fiber by 0.05 to 20% by the above method or the like.
It is preferable to give the weight%. By setting the amount of the antibacterial component to the synthetic fiber to be 0.05 to 20% by weight, sufficient antibacterial performance can be obtained without problems such as dispersibility of the antibacterial component and thread-forming properties.

Further, it is preferable to use the antibacterial synthetic fiber in an amount of 30% by weight or more based on the seat belt webbing in order to obtain sufficient antibacterial performance. By setting the amount of the antibacterial synthetic fiber to 30% by weight or more based on the seatbelt webbing, a seatbelt webbing having a sufficient antibacterial performance can be obtained.

The preferred antibacterial component for synthetic fibers kneaded with the antibacterial component is a high silica mordenite zeolite carrying silver ions. That is, silver ions have higher antibacterial activity than other metal ions such as copper and zinc. In addition, high-silica mordenite-type zeolites are characterized by their anisotropy in crystal structure, large micropores in the network structure, and high density. In this case, there is an advantage that the ceramic guide is hardly worn.

As a method of fixing the antibacterial component to the surface of the synthetic fiber or the seat belt webbing, the antibacterial component is applied by padding, dipping, spraying, coating, or the like, and the antibacterial performance is imparted by performing a dry heat treatment or the like. And the like.

Further, in order to obtain a sufficient antibacterial performance, the antibacterial component is added to the synthetic fiber or the seat belt webbing in an amount of 0.01 to 10% by weight, preferably 1 to 10% by the above method.
The addition of 5% by weight is preferable for obtaining sufficient antibacterial performance. By setting the amount of the antimicrobial component in such a preferable range, the dispersibility in the solvent is maintained satisfactorily, and sufficient antimicrobial performance can be obtained without causing problems such as poor adhesion to fibers.

Further, it is preferable to use the antibacterial synthetic fiber in an amount of 30% by weight or more based on the seat belt webbing in order to obtain sufficient antibacterial performance. By setting the amount of the antibacterial synthetic fiber to 30% by weight or more based on the seatbelt webbing, a seatbelt webbing having a sufficient antibacterial performance can be obtained.

A preferable antibacterial component for contacting and fixing the antibacterial component is a quaternary ammonium salt compound. That is, the quaternary ammonium salt compound exhibits excellent antibacterial performance. It is considered that the antibacterial effect of the quaternary ammonium salt compound is exerted due to the respiratory system inhibitory action against bacteria and fungi, the agglutinating action of cells by cell surface adsorption, and the accompanying lytic action. In addition, the quaternary ammonium salt compound has a high adsorptivity to fibers and the like that are usually negatively charged due to the positively charged N ⁺ in its molecular structure, and has a high affinity for water. Excellent dispersibility and solubility. For this reason, in the synthetic fiber to which the antibacterial component is added, the antibacterial component is extremely stably maintained, and sufficient durability is obtained together with excellent antibacterial performance over a long period of time.

In the above-mentioned antibacterial component and method, it is preferable to select one that does not cause a decrease in antibacterial performance, deterioration or delamination of the antibacterial component under repeated mounting or in a high temperature environment in summer.

The synthetic fiber for seatbelt webbing of the present invention may use a native yarn because of its excellent light fastness. Examples of the method of soaking include, for example, a method in which a colorant is added in an esterification step for polyester polycondensation, which is a material polymer, or a transesterification step, or a polycondensation reaction step, or a method in which a colorant is blended when chips are dried and spun. Method, a method of directly adding a colorant during spinning, melting a master chip containing a high concentration of a colorant,
Conventionally known addition techniques such as a method of spinning by blending with a separately melted base polymer (melt blending method) and a method of blending and spinning a master chip and a base chip containing a high concentration of a coloring agent (chip blending method) Can be selected, and any colorant addition time can be selected. However, in consideration of fiber quality, operation stability, production cost, and the like, it is particularly preferable to employ a chip blending method using a master chip.

The fineness (D) of the synthetic fiber for seat belt webbing of the present invention is preferably 200 to 2000 denier, and the breaking strength is preferably 5.0 g / d or more. When the seat belt is used, in this range, sufficient occupant protection against impact in the event of a vehicle collision is promised, it can be pulled out smoothly from the retractor when wearing it, and it can be smoothly stored in the retractor when removing it it can.

Regarding the fineness and breaking strength of the synthetic fiber for warp, it is particularly preferable that the synthetic fiber has a high strength as compared with the weft, and it is preferable that the synthetic fiber has a density of 750 denier or more and 8.0 g / d or more. Furthermore, the elongation at break is also 10%
It is preferable that it is above. This is because, in this range, the impact force at the time of the vehicle collision is sufficiently absorbed, and the situation that the occupant is injured by the seat belt can be avoided.

The antibacterial seatbelt webbing of the present invention having the above-described structure imparts antibacterial performance to the synthetic fiber constituting the antibacterial seatbelt webbing. It can also suppress the growth of bacteria and is hygienic.

[0029]

Next, the present invention will be described in detail with reference to examples. Each measurement value in the examples was measured according to the following method. [Antibacterial property] A suspension buffer of Staphylococcsu Aureus ATTC6538p, which is a test bacterium, was poured into a sample webbing, and the number of viable cells after shaking at 1500 times / min for 1 hour in a closed container was counted. Then, the difference (%) of the bacteria reduction rate with respect to the number of bacteria in the poured suspension was determined, and the antibacterial property was evaluated. [Method of adjusting webbing after 50 days of contact use] Room temperature about 2
Webbing was stuck on the stair railing indoors at 5 ° C., and had as much contact as possible as a stair climber. Then, the antibacterial property was measured for the webbings after 50 days. [Breaking strength, breaking elongation] Measured according to JIS L 1017 using a Tensilon tensile tester manufactured by Orientec.

(Examples 1 to 4, Comparative Examples 1 to 4) A polyethylene terephthalate chip was supplied to an extruder type extruder, melted and spun from a spinneret. After passing the spun yarn through a heating tube such as a heating tube or a heat insulating tube,
After cooling and solidifying with cold air per minute and then applying an oil agent, it was taken up by a take-up roll whose peripheral speed was controlled to a take-up speed of 700 m / min. Next, for the drawn undrawn yarn,
After continuously giving a 3.0% pre-stretch between two pairs of supply rolls heated and controlled to 70 to 130 ° C., the draw ratio is 5.6 times for the warp and 5.0 for the weft. The film was stretched by a factor of two. After heat setting at a temperature of 210 ° C. simultaneously with the stretching, a relaxation treatment was carried out at a relaxation rate of 1.5% with a relaxation roll, and then the film was wound up into a package by a winder. Further, the obtained synthetic fiber was woven by a needle loom, and then heat set was applied thereto to obtain a seat belt webbing having the configuration shown in Table 1. Here, for Examples 1, 2, and 3 and Comparative Examples 2 and 3,
High silica mordenite (silica / alumina molar ratio is 1
9.5% by weight of silver ions obtained by treating 6) with an aqueous silver nitrate solution
It is a seat belt webbing made of polyethylene terephthalate fiber kneaded with a contained mordenite antibacterial zeolite. The kneading of the antibacterial component into the polyethylene terephthalate fiber is carried out by mixing the polyethylene terephthalate polymer and the antibacterial component into a polymerization tank and performing polymerization while stirring. This was performed by a method of kneading with pellets. In Example 1, the antibacterial fiber was added to both the warp (the antibacterial component content was 0.8% by weight) and the weft (0.8% by weight) in the warp and the weft by 100% by weight.
This is the seat belt webbing used. In Examples 2 and 3 and Comparative Examples 2 and 3 (the content of the antibacterial component was 0.02% by weight in Comparative Example 2 and 0.8% by weight in other cases), the antibacterial fiber was used only in the warp. The seatbelt webbing used, in which the number of the antibacterial fibers was varied during weaving of the webbing (the antibacterial fiber contents for the seatbelts of Examples 2, 3 and Comparative Examples 2, 3 were 71, 54, respectively). 71 and 16
weight%). Example 4 and Comparative Example 4 are seat belt webbings in which an antibacterial resin made of a vinyl polymer having a quaternary ammonium chloride and having a monovalent phosphate group is applied to a webbing and fixed thereto. A 2.5% aqueous solution of an antibacterial agent containing 32% by weight of the antibacterial resin was prepared, and a melamine-based compound, Sumitex M-3, was prepared.
10% aqueous solution (manufactured by Sumitomo Chemical Co., Ltd.), Sumitex Acx (manufactured by Sumitomo Chemical Co., Ltd.) 0.3 as a crosslinking agent
% Aqueous solution and 0.7% aqueous softener, and stirred to give contact with the synthetic fibers and the seat belt webbing. That is, the woven seat belt webbing was immersed in the antibacterial component, squeezed and cured at 130 ° C. for 1 minute to obtain a seat belt webbing of Example 4 to which 0.50% by weight of the antibacterial component adhered. In Comparative Example 4, 0.005% by weight of a 0.025% aqueous solution obtained by diluting the antibacterial resin aqueous solution to 1/100 was used.
This is a seat belt webbing that has been subjected to antibacterial treatment. Table 1 shows the fineness, the number of filaments, the breaking strength, the breaking elongation, and the amount of the antibacterial component kneaded of the synthetic fibers for warp and weft of the antibacterial seatbelt webbing thus obtained. Table 2 shows the measurement results of the antibacterial fiber content of the obtained seatbelt webbing with respect to the seatbelt webbing, and the difference in the rate of bacteria reduction indicating the antibacterial property immediately after production and after 50 days of contact use.

[0031]

[Table 1]

[0032]

[Table 2] As is evident from the results in Table 2, the antibacterial seatbelt webbing of the present invention using synthetic fibers having antibacterial performance (Examples 1 to 4) shows a high difference in the rate of reduction of the bacteria, and the conventional sheet Compared with belt webbing, it had sufficient antibacterial performance and was excellent in hygiene.

[0033]

The antibacterial seatbelt webbing of the present invention can suppress the growth of bacteria even in a high-temperature and high-humidity environment and during repeated use, and is excellent in hygiene.

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Claims (10)

[Claims] 1. An antibacterial seatbelt webbing comprising a warp and a weft, wherein at least the warp contains antibacterial synthetic fibers. 2. The antibacterial seat belt webbing according to claim 1, wherein the antibacterial synthetic fiber is a synthetic fiber obtained by kneading an antibacterial component. 3. An antibacterial component is added to the synthetic fiber in an amount of 0.05 to 2%.
The antibacterial seatbelt webbing according to claim 2, wherein the antibacterial synthetic fiber kneaded at 0% by weight contains 30% by weight or more of the seatbelt webbing. 4. The antibacterial seat belt webbing according to claim 2, wherein the antibacterial component is a high silica mordenite zeolite carrying silver ions. 5. The antibacterial synthetic fiber comprises a synthetic fiber obtained by fixing an antibacterial component to the surface.
The antibacterial seatbelt webbing according to the above. 6. The antibacterial seatbelt webbing according to claim 1, wherein the antibacterial component is fixed to the surface of the seatbelt webbing. 7. The antimicrobial component is used in an amount of 0.01 to 0.01% based on synthetic fibers.
7. The antibacterial seat belt webbing according to claim 5, wherein 10% by weight is fixed, and the antibacterial synthetic fiber is used in an amount of 30% by weight or more based on the seat belt webbing. 8. The antibacterial seat belt webbing according to claim 5, wherein the antibacterial component is a quaternary ammonium salt compound. 9. The antibacterial seatbelt webbing according to claim 1, wherein the antibacterial synthetic fiber is made of an original yarn subjected to an antibacterial treatment. 10. The antibacterial synthetic fiber has a fineness of 200 to 20.
00 denier, breaking strength 5.0 g / d or more, breaking elongation 1
The antibacterial seatbelt webbing according to any one of claims 1 to 9, wherein the antibacterial seatbelt webbing is made of 0.0% or more of a polyester fiber.