JP2001254267A - Interior material for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an interior material for a vehicle, having excellent functionality simultaneously having odorization-preventing deodorant properties with durability, antibacterial properties, mildewproofing properties and antifouling properties, and further to provide an accessory fiber structure thereof. SOLUTION: This interior material for the vehicle has at least one of binder selected from alkyl silicate-based resins, silicone-based resins and fluororesins, a and a photocatalytic agent on the surface of the fiber.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular interior material having excellent functions such as durable anti-odor property, deodorant property, antibacterial property, anti-mold property and anti-fouling property, which have never existed before.

[0002]

2. Description of the Related Art In recent years, awareness of health and hygiene has been increasing in accordance with the improvement of the standard of living of the people. Has been put to practical use.

[0003] On the other hand, in the field of fabric products, particularly in vehicle interior materials used for vehicle seats and the like, there is a high need for such deodorant and antibacterial properties. For example, seats used in cars include
When a person or a pet gets on or off with a dirty foot, body, clothes, or the like, dirt such as mud is easily attached. In addition, there is a tendency for perspiration and the like emanating from the human body to permeate when sitting for a long time. Further, when smoking is performed in a narrow space in a vehicle, the odor is muffled and adheres to sheets and remains for a long time. Despite the environment in which dirt and bad smell are likely to be attached, it is not a thing that is frequently washed like clothes, and it is in a state where mold is easily generated and unsanitary.

[0004] On the other hand, in the prior art, at present, only a technique for spraying a deodorant spray is provided. In this way, the smell disappears temporarily, but the smell that soaks in the cloth will still occur and will not lead to a fundamental solution. In other words, it is extremely difficult to deodorize the odor that has soaked into the cloth with the conventional technology.

[0005]

DISCLOSURE OF THE INVENTION The present invention is excellent in that it has no discoloration or deterioration during use, has a long-lasting odor preventing and deodorizing effect, and simultaneously satisfies antibacterial, antifungal and antifouling properties. Vehicle interior materials having the above functions.

[0006]

The present invention employs the following means in order to solve the above-mentioned problems. That is, it is a vehicle interior material having at least one binder selected from an alkyl silicate resin, a silicone resin and a fluorine resin on a fiber surface and a photocatalyst.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Vehicle interior materials according to the present invention are:
It refers to those that use fibers for at least a part of the members used for the interior of transport vehicles such as passenger cars, commercial vehicles, trucks, buses, railways, ships, aircrafts, etc. It can be preferably used for a material, a skin material for a door, a skin material for a headrest, a skin material for a pillar, and the like.

[0008] The fiber structure in the present invention is a synthetic fiber,
Known materials can be used without any particular limitation such as natural fibers.For example, natural fibers such as wool, silk, cotton, hemp, asbestos, rayon, regenerated fibers such as cupra, semi-synthetic fibers such as acetate, or polyamide or polyester, Synthetic fibers such as polyolefins are used, but in order to further improve the durability required for vehicle interior materials, hair fibers, polyamide fibers such as polycabramid, polyhexamethylene adipamide, and aromatic polyamide-based fibers are used. Fibers, polyolefin fibers such as polypropylene, and polyester fibers such as polyethylene terephthalate, polypropylene terephthalate, and polybutylene terephthalate are preferably used.

[0009] Further, fibers obtained by adding pigments or dyes or matting agents, weathering agents, heat-resistant agents, antioxidants and the like to polymers can be used for the fibers. It may be a copolymer containing a copolymer component. As the copolymerization component, for example, if it is polyamide, ε
-Caproamide, tetramethylene adipamide, hexamethylene sebacamide, hexamethylene isophthalamide, tetramethylene terephthalamide, xylylene phthalamide and the like. In addition, in the case of polyester fibers, as the third component, a material obtained by copolymerizing isophthalic acid, sulfoisophthalic acid, polyethylene glycol, or the like may be used.

As the fiber form, filament yarns, spun yarns, and mixed yarns such as mixed yarns and twisted yarns can be used.

Examples of the fabric structure include a pile moquette, a flat jacquard fabric or the like, a pile knit tricot, a double raschel, a sinker pile, and the like.
A knitted fabric such as a flat knitted tricot or a circular knitted jersey, a non-woven fabric represented by artificial leather, or a combination thereof can be used.

In the present invention, the photocatalytic agent has a property of being excited by ultraviolet rays and oxidatively decomposing organic substances by a strong oxidizing power. Specifically, the photocatalytic agent has a crystal structure called anatase type or rutile type. Titanium oxide. Such a photocatalyst has a deodorizing property, a colorant decomposition / removal property (antifouling property), and a bactericidal property (antibacterial and antifungal).

[0013] For example, the smell of sweat is caused by eccrine glands under the skin,
The water from the apocrine glands is mixed with the resident bacteria around the skin, and it is mainly composed of ammonia and isovaleric acid. It is considered that the main component is touched and decomposed into CO2 (carbon dioxide) and H20 (water) to deodorize. In addition, the so-called aging odor (middle-aged and old-aged odor) contains the main component nonenal, the old-man odor (middle-aged and old-fashioned odor) contains the main component indole and skatole, the excrement odor contains the main component ammonia, and the other body odor contains the main component acetaldehyde. Methyl mercaptan and nicotine, the main component in tobacco odor, can be similarly decomposed with a photocatalyst.

In the present invention, among the photocatalysts, it is preferable to use a composite oxide of titanium and silicon.
As such a composite oxide, a catalyst produced by the method described in Japanese Patent Publication No. 5-55184 may be used. In general,
Binary composite oxide composed of titanium and silicon, for example,
As described in Kobe Tabe (Catalyst, Vol. 17, No. 3, p. 72, 1975, published by The Catalysis Society of Japan), it is known as a solid acid, and the ratio of titanium to silicon is converted to the molar ratio of elements. 20 to 95 mol% titanium and 5 to 80 mol% silicon
Is preferable.

If the particle size of the photocatalyst is too large or the specific surface area is too small, the decomposition rate of organic substances, especially bacteria, tends to decrease. In addition, the deodorizing reaction is considered to go through a process in which malodorous components are adsorbed on the catalyst and then undergo ultraviolet oxidative decomposition, and the quality of adsorption of malodorous components is considered to have a large effect on deodorizing efficiency. Is preferably from 100 to 300 m ² / g, and those having a primary particle diameter of 20 nm or less are preferably used. The amount of the photocatalyst attached to the fiber structure is
0.05 to 30% by weight is preferable, and in a method of applying to print or gravure fabric, more preferably 0.0 to 30% by weight.
5 to 20% by weight. In the method of impregnating the processing agent with padding, from the viewpoint of softness of the texture, 0.08 to 0.08
A coating weight of 10% by weight is more preferred.

In the present invention, at least one kind of binder selected from an alkyl silicate resin, a silicone resin and a fluorine resin is used for adhering a photocatalyst comprising a composite oxide of titanium and silicon to the fiber surface. It is preferable to use The difference between such a silicone resin and a fluorine resin and an acrylic resin, a urethane resin, an epoxy resin, etc., which are often used, is that they hardly contain hydrocarbon groups which are easily decomposed by the action of heat or chemicals, and the silicone resin is The Si-O bond and the fluorine-based resin are mainly composed of the F-C bond, and are such that a small amount of a methyl group or a phenyl phase is contained as a hydrocarbon in a terminal group or a side chain. That is, due to the presence of such a binder, decomposition attributed to oxidation of the resin by the photocatalyst,
Coloring and generation of odor can be prevented.

The alkyl silicate used in the present invention is mainly composed of a straight-chain or branched saturated alkyl having an Si—O bonding portion, and has OH groups at both ends thereof. That is, it includes the structure shown below. OH- (Si-O) _n- R-OH In the formula, R is a linear or branched saturated alkyl group having 1 to 10 carbon atoms, n represents an integer of 1 or more, and preferably an inorganic In the range of 1,000 to 10,000 in order to increase the

Such an alkyl group is a linear or branched saturated alkyl such as methyl, ethyl, propyl, isopropyl and the like.

The amount of the resin adhering to the fiber is 0.05 to 3 in the coating method from the viewpoint of holding the photocatalyst and feeling.
0% by weight is preferable, and 0.05 to 1 in the impregnation method.
It is preferably 0% by weight.

As the silicone-based resin, a condensation-crosslinkable resin belonging to the class of silicone resin or silicone varnish can be used. Such a resin may be a condensation-crosslinkable resin such as tetraethoxysilane or methyltrimethoxysilane. , Or those obtained by condensing several kinds of blends. These are 3
A resin having a three-dimensional structure is formed, and it has the highest heat resistance and chemical resistance among silicone resins. The amount of the resin adhering to the fiber is preferably 0.05 to 100% by weight in the coating method and 0.05 to 30% by weight in the impregnation method, from the viewpoint of holding the photocatalyst and feeling.

As the fluororesin, vinyl ether and / or vinyl ester and a fluoroolefin polymerizable compound are preferably used because they have excellent properties. For example, polyvinyl fluoride, polytetrafluoroethylene, tetrafluoroethylene-perfluoroalkylvinylester, vinylester-fluoroolefin, and the like are preferably used because they are less decomposed and deteriorated.
The amount of the resin adhered to the fibers is preferably 0.05 to 100% by weight in the coating method and 0.05 to 30% by weight in the impregnation method from the viewpoints of holding the photocatalyst and feeling.

It is preferable to further add zeolite to such a binder because it has an effect of further improving antibacterial performance. That is, it has the effect of improving the adsorption power of odorous components and increasing the ratio of inorganic components in the structure, and suppressing the decomposition of the structure and the binder by the photocatalyst. The use of a zeolite carrying a noble metal such as gold, platinum, silver, or palladium, preferably in a range of 0.01 to 5% by weight, exhibits a function of further improving the antibacterial effect. The amount of such zeolite adhering to the fiber is preferably 0.01 to 10% by weight in the coating method, and preferably 0.01 to 5% by weight in the impregnation method, from the viewpoint of the manifestation of the effect and the feeling.

Further, by further adding a coupling agent such as a silane coupling agent to the above-mentioned binder, the adhesive strength between an inorganic substance and an organic substance can be improved. The coupling agent exerts a chemical bonding force between the fiber, the binder, and the photocatalyst, and exhibits an effect of remarkably improving the washing durability. Although the car interior is difficult to wash at home, the interior may be washed in a professional car wash service, and in such a case, even if a strong detergent is used, the effects of the present invention such as deodorization are not lost. Improving wash durability is significant. In addition, durability can be improved even under severe conditions such as stress and abrasion when the occupant is seated. In addition, durability can be improved even with respect to direct sunlight or a severe temperature change in the vehicle. The amount of the coupling agent attached to the fiber, from the point of expression of effect and texture,
In the coating method, the content is preferably 0.01 to 30% by weight, and in the impregnation method, the content is preferably 0.01 to 10% by weight.

As a method for adhering the photocatalyst agent and the binder to the fiber surface, for example, a so-called impregnation method of impregnating a processing liquid, squeezing with a mangle roll and passing through a dry-cure process, or a method such as printing or gravure is used. A coating method can be preferably employed. In the impregnation method, the conditions of temperature and time for dry-curing are as follows: dry: 110 to 135 ° C. × 1 to 3 minutes;
190 ° C. × 1 to 3 minutes is preferably applied. In the coating method, the coating process such as printing and gravure is performed by adjusting the working liquid to an appropriate viscosity with a glue, and applying with a knife coater, a gravure roll coater, printing, etc.
So-called ordinary print processing and gravure processing, which are fixed at a temperature of 200 ° C. × 5 to 30 minutes, can be preferably applied.

[0025] Thus, it is possible to provide a vehicle interior material having extremely excellent functionality satisfying the durable odor prevention / deodorization property, antibacterial property, antifungal property and antifouling property which has never existed before. is there.

[0026]

The present invention will be described in more detail with reference to the following examples. The following methods were used for quality evaluation in the examples.

(Washing) Automatic reversing spiral electric washing machine VH
-3410 (manufactured by Toshiba Corp.) and commercially available detergent 0.2
%, A temperature of 40 ± 2 ° C., and a bath ratio of 1:50, for 5 minutes with strong reversal, followed by rinsing for 2 minutes while draining and overflowing, and this was repeated once.

(Evaluation of Deodorizing Property by Detector Tube Method)
A 500 ml container containing g was charged with ammonia gas so as to have an initial concentration of 200 ppm, and was sealed. After standing for 1 hour, the residual ammonia concentration was measured with a gas detector tube. Then, it was calculated as the deodorizing rate (%) according to the following formula (odor A). Deodorization rate (%) = [1- (concentration measured by gas detector tube) / (initial concentration)] × 100 After 200 ppm of acetaldehyde for 1 hour in the same manner (odor B). Methyl mercaptan 60 ppm-After 3 hours (odor C), the residual gas concentration was measured, and the deodorizing rate of each gas was calculated.

(Evaluation of deodorant odor against tobacco odor) 5
Place the 00 ml glass Erlenmeyer flask with the entrance down,
After placing a smoking cigarette immediately below the entrance for 5 seconds, the sample was charged 3 g with the Erlenmeyer flask placed sideways and sealed with a glass stopper. After leaving for 1 hour, the glass stopper was opened, and ten persons smelled the residual odor to perform a sensory evaluation. The odor at that time was evaluated by the following evaluation score, and the average value was obtained. 5: Strong smell 4: Strong smell 3: Easy to sense 2: Weak smell to know what smell 1: No smell (Odor evaluation of odor prevention by isovaleric acid smell) 0.01
5 μl of a 1% aqueous solution of isovaleric acid is weighed with a microsyringe, and five drops are dropped at the center of the cloth cut into a size of 10 cm × 10 cm. The method of dropping is 1 at the center of the fabric.
Four points are dripped just like the fifth point of the dice so as to surround a point and then one point in the center. After the cloth was left under a fluorescent lamp for 3 hours, ten persons smelled the smell of the cloth to perform a sensory evaluation. The odor at that time was evaluated by the following evaluation score,
The average was given. The criterion for the evaluation score is the same as that for the above cigarette smell.

(Antibacterial evaluation method)
Test cells used were Staphylococcus aureus clinical isolates. The test method was as follows. The test bacteria were poured into a sterilized test cloth, the number of viable bacteria after culturing for 18 hours was counted, and the number of bacteria relative to the number of cultured bacteria was obtained. Under the condition of log (B / A)> 1.5, log (B / C) was defined as the difference in the number of bacteria, and 2.2 or more was regarded as acceptable. Here, A represents the number of bacteria collected and dispersed immediately after inoculation of the unprocessed product, B represents the number of bacteria collected and dispersed after 18 hours of culturing of the unprocessed product, and C represents the number of bacteria collected and dispersed after culturing the processed product for 18 hours.

(Method of evaluating antifouling property) Procedure 1: 100 ° C. × polyethylene bag (20 liters)
0.2 g of contaminants having the composition shown in Table 1 dried for 2 hours, a sample of 10 cm in length and 16 cm in width, and one rubber tube for ICI pilling are put. Inflate the bag (to about 10 liters) with air at 20 ° C. × 65% RH and stop with a rubber band.

[0032]

[Table 1]

Procedure 2: The polyethylene bag of Procedure 1 is used for ICI
Place in tester box and rotate for 1 hour. Then remove the sample. Step 3: Wash the treated sample once under standard washing conditions.
Steps 1 to 3 are repeated twice more. Step 4: As described above, the L value (brightness) of the sample in which the contaminant adhesion / washing was repeated 10 times and the untreated sample are measured with a colorimeter, and the ΔL value is calculated. ΔL value is smaller,
Good, hard to get dirt and easy to remove dirt.

Example 1 100% polyester, 11
A single circular knitting machine of 18 gauge using 0 decitex, 24 filament false twisted yarn (manufactured by Fukuhara Seiki)
A circular knit jersey was obtained by KL-JS2). Then, scouring and dyeing (ivory-colored disperse dye for automobile interior) were performed under ordinary processing conditions.

(Photocatalyst Processing) Next, a processing liquid was prepared using the following processing agents and the amounts used. A. Composite oxide of titanium and silicon (concentration: 20%): 0.8% by weight A composite oxide of titanium and silicon (Ti _0.8 Si _0.2 O ₂ ) having an average primary particle diameter of 7 nm and an average specific surface area of 150 m ² / g. Into a dispersion of an aqueous solution having an average particle size of 0. Those having a thickness of 3 μm were used. B. C. Alkyl silicate resin (concentration 20%): 0.5% by weight Silicone resin (concentration 45%): 1.9% by weight Noble metal-supported zeolite (concentration: 20%): 0.18% by weight Silane coupling agent (concentration 100%): 0.18% by weight.

The dyed fiber fabric is immersed in this, squeezed with a mangle roll at 80% by weight of a pickup, and heated at 130 ° C.
After drying for 1.5 minutes at 180 ° C., a heat treatment was performed at 180 ° C. for 1 minute to obtain a fabric structure containing a photocatalyst on the fiber surface, and a skin material for an automobile seat was obtained as a vehicle interior material of the present invention. The fabric was evaluated for odor prevention (deodorizing properties), antibacterial properties, antifouling properties, etc., and the results are shown in Table 2.

(Example 2) Instead of obtaining a circular knitted jersey in Example 1, a yarn of 100% polyester, 44 dtex and 18 filaments was used for the front yarn, and a false twist of 35 dtex and 12 filaments of 100% polyester was used. Using a processed yarn for the back yarn, a 28-gauge single tricot machine (KARL MAYER SU
KS5) knitted the tricot dough. Subsequently, scouring, dyeing (ivory-colored disperse dye for automobile interior), and napping were performed under ordinary processing conditions. Next, photocatalytic processing was performed in the same manner as in Example 1 to obtain a skin material for an automobile ceiling as a vehicle interior material of the present invention. This fabric was evaluated for anti-odor properties (deodorizing properties), antibacterial properties, antifouling properties, and the like, and the results are shown in Table 2.

(Example 3) The same raised fabric as in Example 2 was prepared, and a processing liquid was prepared using the following processing agents and the following amounts. A. Composite oxide of titanium and silicon (concentration: 20%): 12.5% by weight A composite oxide of titanium and silicon (Ti _0.8 Si _0.2 O ₂ ) having an average primary particle diameter of 7 nm and an average specific surface area of 150 m ² / g Was used as a dispersion of an aqueous solution having an average particle diameter of 0.3 μm. B. C. Alkyl silicate resin (concentration 20%): 7.5% by weight Silicone resin (concentration 45%): 25.0% by weight Noble metal-supported zeolite (concentration: 20%): 2.4% by weight Silane coupling agent (concentration 100%): 2.4% by weight.

[0039] Such a working fluid: 120 parts of glue is further added to 40 parts.
Parts, and printing and printing were performed on a screen. After printing and drying at 120 ° C for 2 minutes, 180
C. for 1 minute with superheated steam to wash and finish the paste. Thus, a fabric structure containing a photocatalyst on the fiber surface was obtained, and a skin material for an automobile ceiling was obtained as a vehicle interior material of the present invention. About this fabric, odor prevention (deodorant),
The antibacterial properties and antifouling properties were evaluated, and the results are shown in Table 2.

(Comparative Example 1 and Comparative Example 2) The fiber fabrics used in Examples 1 and 2 at the time of dyeing and at the time of raising the brush were used to prevent deodorization, antibacterial properties, antifouling properties, etc. Were compared and evaluated, and the results are shown in Table 2.

[0041]

[Table 2]

As is evident from Table 2, those of Examples 1 to 3 have a lower odor prevention and deodorizing property than the comparative examples.
It can be seen that they exhibit an extremely excellent level of performance, and are also excellent in antibacterial properties, antifouling properties and durability.
In addition, as a result of mounting the car seat seat skin material and the car ceiling skin material on a test car body and simulating the use thereof,
As in the case of the fabric evaluation, extremely excellent odor prevention and antibacterial effects were confirmed.

[0043]

According to the present invention, it is possible to provide a durable vehicle interior material having excellent functions, which is durable, has a deodorizing property, an antibacterial property, an antifungal property and an antifouling property. .

Continued on the front page F term (reference) 3D023 BA01 BB01 BC01 BC02 BC03 BD01 BD03 BD08 BD28 BE04 4L031 AB31 BA09 BA19 DA12 DA13 DA19 4L033 AA07 AB06 AC10 AC15 BA96 CA17 CA22 CA59 DA06

Claims (10)

[Claims] 1. An alkyl silicate resin on a fiber surface,
A vehicle interior material having at least one binder selected from a silicone-based resin and a fluorine-based resin, and a photocatalytic agent. 2. The method according to claim 1, wherein the binder is 0.05 to 1 with respect to the fiber.
The vehicle interior material according to claim 1, which is contained by 00% by weight. 3. The vehicle interior material according to claim 1, wherein the photocatalyst is a composite oxide comprising titanium and silicon. 4. The vehicle interior material according to claim 1, wherein the photocatalyst is a particle having a specific surface area of 100 to 300 m ² / g. 5. The photocatalytic agent has an average primary particle diameter of 1 to 20 n.
The vehicle interior material according to any one of claims 1 to 4, which is in a range of m. 6. The photocatalyst is used in an amount of 0.05 to 30 to the fiber.
The vehicle interior material according to any one of claims 1 to 5, which is contained by weight%. 7. The vehicle interior material according to claim 1, wherein the binder contains zeolite. 8. The method according to claim 1, wherein the zeolite has a fiber content of 0.01 to 1%.
The vehicle interior material according to claim 7, which is contained at 0% by weight. 9. The vehicle interior material according to claim 1, wherein the binder has a silane coupling agent. 10. The vehicle interior material according to claim 9, wherein the silane coupling agent is contained in an amount of 0.01 to 30% by weight based on the fiber.