JP2006305733A - Skin material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a skin material enhanced in its touch, and its treatment method. <P>SOLUTION: Each of skin materials (A and B) includes a base material 20 and a water absorbent powder 10 and the water absorbent powder 10 protrudes from the surface of each of the skin materials (A and B). <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a skin material, and more particularly to a skin material with improved tactile sensation.

  In order to impart durability and light resistance to the skin material, there is a surface treatment method for forming a coating film having a thickness of about 30 to 50 μm on a substrate such as resin, genuine leather or artificial leather, but the coating film is formed. As a result, the feel of the substrate may be impaired.

  Artificially synthesized skin materials such as resin and artificial leather can impart durability and light resistance to the base material itself, but may have a less tactile sensation than genuine leather.

Patent Document 1 exemplifies a method of forming a coating film on artificial leather.
JP 2002-339262 A

  An object of the present invention is to provide a skin material with improved tactile sensation and a method for treating the skin material.

  The present inventors have found that a skin material excellent in tactile sensation can be provided by disposing a water-absorbing powder on the surface of the skin material, and have led to the present invention. That is, the present invention is a skin material including a base material and a water-absorbing powder, wherein the water-absorbing powder protrudes from the surface.

  The skin material excellent in tactile sensation can be provided by the present invention.

  A first aspect of the present invention is a skin material including a base material and a water-absorbing powder, wherein the water-absorbing powder protrudes from the surface.

  When the water-absorbing powder is arranged on the surface, the water-absorbing powder absorbs and retains moisture in the air, so that the touch feeling of the skin material is moist, so the touch feeling of the skin material can be improved over the conventional one. .

  A schematic cross-sectional view of the skin material of the present invention is shown in FIG. The skin material of the present invention may have a structure in which the water-absorbing powder 10 is directly disposed on the base material 20 as shown in FIG. 1A, or the coating film 30 is formed on the base material 20 as shown in FIG. A structure in which the water-absorbing powder 10 is disposed on the coating film 30 may be used.

  Further, the present invention is not limited to FIG. 1. For example, all of the water-absorbing powder may not be disposed at the same depth, or the water-absorbing powder may be disposed other than the surface of the skin material. Various constituent elements may be included as long as the effects of the present invention are not impaired, such as a plurality of films formed on the substrate.

  The substrate is preferably genuine leather, artificial leather or resin. The animal derived from genuine leather is not particularly limited, and examples include cattle, sheep, goats, pigs, horses, kangaroos, deer, ostriches, crocodiles, and snakes. The artificial leather is preferably at least one selected from artificial leather, synthetic leather, and vinyl leather, and more preferably artificial leather. As a constituent material of the artificial leather, thermopolyurethane, polyurethane, polyvinyl chloride, and thermopolyolefin are preferable. The resin is preferably at least one selected from natural resins, semi-synthetic resins, and synthetic resins, and more preferably synthetic resins. As the synthetic resin, polypropylene and ABS are preferable.

  It is desirable that the water-absorbing powder has a water-absorbing power that absorbs moisture, a water-holding power that holds the absorbed water, or a moisture-holding power that moisturizes the surrounding substrate or coating film by releasing the absorbed water to some extent. The water-absorbing powder is not particularly limited, but is preferably made of a water-absorbing polymer because of its excellent water absorption and easy control of the spacing between the particles when the water-absorbing powder is disposed. As the water-absorbing polymer, conventionally known materials such as those made of polyacrylic acid or polyvinyl alcohol can be selected as appropriate. More specifically, SunFresh (registered trademark) and Aqua Pearl (registered trademark), Aquaric (registered trademark) CA manufactured by Nippon Shokubai Co., Ltd., and Aqua Keep (registered trademark) manufactured by Sumitomo Seika Co., Ltd. are preferably used.

  When the coating film is formed on the substrate, the coating film is not particularly limited, but is selected from acrylic resin, urethane resin, polyester resin, polyamide resin, polystyrene resin, polyethylene resin, fluororesin, and polyacrylonitrile resin. What contains at least 1 type is preferable. The thickness of the coating film is preferably 30 to 50 μm.

  The protruding portion of the water absorbent powder is preferably 1/3 or less of the volume of the water absorbent powder. If the water-absorbing powder protrudes beyond 1/3, the water-absorbing powder may fall off the skin material.

  The particle shape of the water-absorbing powder is not particularly limited, but is preferably spherical. The average particle size of the water-absorbing powder is preferably 50 μm or less, more preferably 20 μm or less, still more preferably 20 to 15 μm, and particularly preferably the particle size length is 20 μm or less at maximum. When the average particle size is 50 μm or less, it is preferable because the appearance is difficult to be damaged. Particularly, when the average particle size of the powder is 20 μm or less, the protrusion of the water-absorbing powder is an average of 1/3 of the volume of the water-absorbing powder. Is preferable because the appearance is not significantly impaired. The protrusion of the water-absorbing powder can be confirmed by SEM observation.

  On the surface, the projected area occupied by the water-absorbing powder is preferably 12.0% or less, more preferably 0.2 to 12.0%. If it exceeds 12.0%, the appearance may be impaired, and further, the touch of the skin material may be betrayed. If it is less than 0.2%, the effects of moisture absorption, retention and moisture retention may not be obtained. The projected area occupied by the water-absorbing powder can be confirmed by SEM observation.

  The average interparticle distance of the water absorbent powder is preferably 33 to 250 μm. If it exceeds 250 μm, the appearance may be impaired, and further, the touch of the skin material may be betrayed. If the thickness is less than 33 μm, the effect of moisture absorption / retention may not be obtained. The average interparticle distance of the water absorbent powder can be confirmed by SEM observation.

  When a coating film is formed on the skin material, cracking of the coating film may occur for reasons such as drying, but it is also possible to prevent drying of the coating film by including a water-absorbing powder.

  The second of the present invention is a method for treating the skin material.

  As a first embodiment of the skin material processing method, as illustrated in FIG. 2, a step (S 1) of forming the base material 20 including the water-absorbing powder 10 and the base material 20 by etching 100 are used to absorb water. And a method of treating the skin material including the step of projecting the powder 10 (S2). However, the present invention is not limited to FIG.

  As a method for forming a substrate containing water-absorbing powder, a method such as injection molding, spray skin molding, or powder slush molding is preferably used. The conditions for forming the substrate by these methods can be appropriately determined depending on the resin used, but the amount of water-absorbing powder added is preferably 36.0% or less with respect to the resin. If it exceeds 36.0%, the projected area occupied by the water-absorbing powder on the surface may increase, and the tactile sensation of the skin material may be drastic.

  As the etching, chemical treatment or blast treatment may be performed.

  The chemical treatment is not particularly limited, and can be appropriately determined depending on the material of the substrate such as a wet method and a dry method.

The blasting conditions are not particularly limited and can be appropriately determined depending on the material of the base material. Examples of the blasting agent include resin-based abrasives such as nylon beads, polyplus, and polycarbonate beads. Is preferred. Use of a resin-based abrasive is preferable because only the substrate can be polished without polishing the water-absorbing polymer. The air pressure at which the blast treatment agent is sprayed on the surface of the skin material varies depending on the type and size of the base material, coating film, and water-absorbing powder used, but is preferably 1.0 to 3.0 kg / cm ² , more preferably. Is 1.5 to 2.5 kg / cm ² . An air pressure of 1.0 to 3.0 kg / cm ² is preferable because only the substrate can be polished without polishing the water-absorbing polymer.

  As a second embodiment of the skin material processing method, a step (S1) of forming the coating film 30 containing the water-absorbing powder 10 on the base material 20 illustrated in FIG. And a method of treating the skin material including the step (S2) of protruding the water-absorbent powder 10. However, the present invention is not limited to FIG.

  As the paint, a solution containing at least one selected from acrylic resin, urethane resin, polyester resin, polyamide resin, polystyrene resin, polyethylene resin, fluororesin, and polyacrylonitrile resin is preferable, and more preferably AX6 manufactured by Origin Electric Co., Ltd. , Nippon Bee Chemical Co., Ltd. Be-soft series, and Cash Co., Ltd. # 310 and other leathers used for surface treatment of genuine leather and artificial leather.

  As a method of forming a coating film containing a water-absorbing powder, there is a method in which a water-absorbing powder is added to a paint, the water-absorbing powder is uniformly dispersed, and then dried to obtain a coating film.

  As a method for uniformly dispersing the water-absorbing powder, a conventionally known technique can be appropriately used, but a disper is preferably used. The conditions for dispersing using a disper are preferably 30 to 60 minutes at room temperature, while confirming the dispersion state with a blind gauge.

  As a method for applying the paint containing the water-absorbing powder, conventionally known techniques such as blade coating, spray coating, gravure coating, screen printing, and ink jet printing can be appropriately used.

  Conventionally known techniques can be appropriately used as a method for drying the paint containing the water-absorbing powder, but a drying furnace is preferably used. As conditions for performing drying using a drying furnace, it is preferable to apply air of 80 to 90 ° C. at a wind speed of 10 to 50 cm / sec for 10 to 30 minutes.

  The etching is as described in the first embodiment of the skin material processing method described above.

  As a third embodiment of the skin material processing method, a step (S1) of applying the paint 31 to the base material 20 illustrated in FIG. 4 and a water-absorbing powder on the paint 31 before the paint 31 is solidified. And a method of treating the skin material, which includes a step (S2) of dispersing 10. However, the present invention is not limited to FIG. The code | symbol 200 in FIG. 4 shows the spreading | diffusion part for spraying a water absorbing powder.

  It is preferable to use the third embodiment of the skin material processing method because most of the water-absorbing powder can be arranged at the same depth.

  The paint is as described in the second embodiment of the method for treating the skin material. Conventionally known techniques such as blade coating, spray coating, gravure coating, screen printing, and ink jet printing can be appropriately used as a coating method for the paint. The thickness of the paint can be appropriately determined in consideration of the difference in density between the water-absorbing polymer and the paint, and the thickness becoming thinner when the paint is dried to form a coating film. The same value as the average particle diameter of the molecule is preferred.

  As a method of spraying the water-absorbing powder on the paint, sputtering is preferably mentioned. The sputtering conditions are not particularly limited, and can be appropriately determined depending on the type of paint or water-absorbing powder. Moreover, it is preferable to use a mesh when performing sputtering. By adjusting the size of the mesh gap, the size of the particles of the water-absorbing powder can be adjusted, and the distance between the particles can also be adjusted.

  As a method for drying the paint after spraying the water-absorbing powder, a conventionally known technique can be appropriately used, but a drying furnace is preferably used. As conditions for performing drying using a drying furnace, it is preferable to apply air of 80 to 90 ° C. at a wind speed of 10 to 50 cm / sec for 10 to 30 minutes.

  According to a third aspect of the present invention, there is provided a vehicle including the above-described skin material or the skin material manufactured by the above-described method.

  Since the skin material of the present invention is excellent in tactile sensation, the use of the skin material of the present invention makes the interior environment comfortable.

  The skin material of the present invention is preferably applied to a seat, a door, an instrument, an armrest, a console box, and a handle, and more preferably a seat, a door, an instrument, an armrest, and a console box, among vehicle components. .

  The vehicle is not particularly limited. For example, a sedan such as a Nissan Skyline (registered trademark) V35, a compact car such as a March (registered trademark) K12 manufactured by Nissan Motor, a Serena (registered by Nissan Motor Co., Ltd.) Trademarks) Minivans such as C24, wagons such as Primera Wagon (registered trademark) WP11 manufactured by Nissan Motor Co., Ltd., sporty cars such as Fairlady Z (registered trademark) Z33 manufactured by Nissan Motor Co., Ltd., minicar, coupe, SUV, 1BOX, 2BOX , Vans, and trucks.

  Further, the skin material of the present invention is not limited to a vehicle, and can be applied to furniture, clothing, sports equipment, and the like.

  EXAMPLES Next, although an Example is given and this invention is demonstrated concretely, these Examples do not restrict | limit this invention at all.

Example 1
The volume of water-absorbent powder (manufactured by Sanyo Chemical Industries, Ltd., product name: Sunfresh Series ST-250MPS) in the paint (Origin Electric Co., Ltd., product number: AX6) is 0.6% with respect to the paint. Then, using a known disper, the water-absorbing powder was dispersed at room temperature for 45 min to prepare a water-absorbing powder coating material. A blind gauge was used to confirm the dispersion state.

  The paint is applied on genuine leather (manufactured by Hokuyo Co., Ltd., general-purpose leather) using a spray gun (manufactured by Anest Iwata Co., Ltd., model number: CUP PC-45), and then air of 85 ± 2 ° C. is used using a dryer. A coating film was formed by drying by applying a wind speed of 30 cm / sec for 17 minutes.

Next, at an air pressure of 2.0 kg / cm ² , a blast treatment agent (manufactured by Fuji Seisakusho, nylon beads, product name Fuji nylon beads) and a blast gun (manufactured by Osawa, Inc., model number: W301 ES-22) A skin material was produced by performing a blasting treatment using a water-absorbing powder that protrudes 1/3 or less of its volume. The thickness of the coating film was 40 μm, the projected area occupied by the water-absorbing powder was 0.2%, and the average interparticle distance was 250.0 μm.

  Table 1 shows the results of tactile sensation evaluation and appearance evaluation using the obtained skin material.

  Tactile sensation is evaluated with a blind (a method that evaluates only the tactile sensation without adding a sensation such as “feeling moist” or “looks soft”) to the sample. It was evaluated in five levels whether it was moist. Based on the genuine leather shown in Comparative Example 1 below, with the normal touch applied, the same tactile feel as in Comparative Example 1 was given 3 points, and the one with a slightly moist feeling was 4 points. The feeling was given 5 points.

  Appearance evaluation was evaluated only visually for the samples. On the basis of Comparative Example 1 below, 3 points were given the same appearance as Comparative Example 1 and 2 points were given to the appearance loss.

(Example 2)
A skin material was prepared in the same manner as in Example 1 except that the water-absorbing powder was added so that the volume of the water-absorbing powder was 1.5% with respect to the paint. The thickness of the coating film was 40 μm, the projected area occupied by the water-absorbing powder was 0.5%, and the average interparticle distance was 166.7 μm. Tactile evaluation and appearance evaluation were performed using the obtained skin material.

(Example 3)
A skin material was produced in the same manner as in Example 1 except that the water-absorbing powder was added so that the volume of the water-absorbing powder was 3.9% with respect to the paint. The thickness of the coating film was 40 μm, the projected area occupied by the water-absorbing powder was 1.3%, and the average interparticle distance was 100.0 μm. Tactile evaluation and appearance evaluation were performed using the obtained skin material.

Example 4
A skin material was prepared in the same manner as in Example 1 except that the water-absorbing powder was added so that the volume of the water-absorbing powder was 5.7% with respect to the paint. The thickness of the coating film was 40 μm, the projected area occupied by the water-absorbing powder was 1.9%, and the average interparticle distance was 83.3 μm. Tactile evaluation and appearance evaluation were performed using the obtained skin material.

(Example 5)
A skin material was produced in the same manner as in Example 1 except that the water-absorbing powder was added so that the volume of the water-absorbing powder was 15.9% with respect to the paint. The thickness of the coating film was 40 μm, the projected area occupied by the water-absorbing powder was 5.3%, and the average interparticle distance was 50.0 μm. Tactile evaluation and appearance evaluation were performed using the obtained skin material.

(Example 6)
A skin material was prepared in the same manner as in Example 1 except that the volume of the water-absorbing powder was 35.7% with respect to the paint. The thickness of the coating film was 40 μm, the projected area occupied by the water-absorbing powder was 11.9%, and the average interparticle distance was 33.3 μm. Tactile evaluation and appearance evaluation were performed using the obtained skin material.

(Example 7)
The volume of the water-absorbing powder (manufactured by Sanyo Chemical Industries, Ltd., product name: Sun Fresh Series ST-250MPS) is 36.0 with respect to the base material in the pellets of polypropylene resin (manufactured by Sun Aroma, product name: PM801A) as a base material. %, And the resin temperature is 210 ° C., the mold temperature is 40 ° C., the injection pressure is 50 MPa, the holding pressure is 35 MPa, the injection speed is 25 mm / sec, the injection time is 20 sec, and the cooling time is 25 sec. A base plate with a thickness of 3 mm containing powder was prepared.

Next, with respect to this base plate, at an air pressure of 2.0 kg / cm ² , a blast treatment agent (manufactured by Fuji Seisakusho, nylon beads, product name: Fuji nylon beads) and a blast gun (manufactured by Osawa Corporation, A skin material was produced by performing a blasting treatment using a model number: W301 ES-22), and projecting the water-absorbing powder to 1/3 or less of the volume. The projected area occupied by the water-absorbing powder was 11.9%, and the average interparticle distance was 33.3 μm. Tactile evaluation and appearance evaluation were performed using the obtained skin material.

(Example 8)
Except for not adding water-absorbing powder, a primer for polypropylene resin (RB-182, manufactured by Nihon Bee Chemical Co., Ltd.) with a dry film thickness of 13 μm was formed on a base plate having a thickness of 3 mm produced in the same manner as in Example 7. After coating, and further applying the water-absorbing powder coating material prepared in Example 2, it was dried by applying air at 85 ± 2 ° C. for 17 minutes at a wind speed of 30 cm / sec using a dryer to form a coating film.

Next, at an air pressure of 2.0 kg / cm ² , a blast treatment agent (manufactured by Fuji Seisakusho Co., Ltd., nylon beads, product name: Fuji nylon beads) and a blast gun (manufactured by Osawa Co., Ltd., model number: W301 ES-22) A skin material was prepared by projecting the water-absorbing powder to 1/3 or less of the volume. The thickness of the coating film was 40 μm, the projected area occupied by the water-absorbing powder was 0.5%, and the average interparticle distance was 166.7 μm. Tactile evaluation and appearance evaluation were performed using the obtained skin material.

  Table 1 shows the results of tactile sensation evaluation and appearance evaluation using the obtained skin material.

Example 9
Liquid thermopolyurethane (PU (urethane resin), manufactured by Achilles Co., Ltd., product name: Cabron) as a base material has a volume of water-absorbing powder (manufactured by Sanyo Chemical Industries, Ltd., product name: Sunfresh Series ST-250MPS) It added so that it might become 36.0% with respect to a base material, and spray skin shaping | molding was performed using the small discharge balance arm type | mold gunner (made by Tsubako KK Co., Ltd.). That is, the temperature of an electroformed mold mold with an inverted skin pattern is adjusted at 72 ° C., and sprayed with thermo-polyurethane uniformly with a spray gun, cured for 300 seconds, and then demolded from the mold mold to contain water-absorbing powder. A substrate sheet having a thickness of 3 mm was produced. A skin material was produced in the same manner as in Example 7 except for the above. The projected area occupied by the water-absorbing powder was 11.9%, and the average interparticle distance was 33.3 μm.

(Example 10)
The volume of water-absorbent powder (manufactured by Sanyo Kasei Kogyo Co., Ltd., product name: Sunfresh Series ST-250MPS) is added to the powdery polyvinyl chloride (PVC, manufactured by Achilles Co., Ltd., product name: partner) as the base material. The powder slush molding was performed using a rotary powder slush molding machine (manufactured by Nakata Coating Co., Ltd.). That is, an electroformed mold mold having an inverted skin pattern is heated at 240 ° C., and after the powder mixture (polyvinyl chloride + water absorbent powder) is added thereto, the mold is placed so that the powder is uniformly distributed in the mold. Spin and return excess powder to cure for 320 seconds. Then, after cooling to 60 degreeC, the base material sheet | seat with a thickness of 3 mm containing water absorbing powder was produced by removing a skin. A skin material was produced in the same manner as in Example 7 except for the above. The projected area occupied by the water-absorbing powder was 11.9%, and the average interparticle distance was 33.3 μm.

(Example 11)
A skin material was prepared in the same manner as in Example 10 except that powdered thermopolyolefin (TPO, manufactured by Kyowa Leather Co., Ltd.) was used as the base material. The projected area occupied by the water-absorbing powder was 11.9%, and the average interparticle distance was 33.3 μm.

(Example 12)
ABS resin (manufactured by UMG Corporation, product name: EX190) pellets as a base material, resin temperature 240 ° C., mold temperature 60 ° C., injection pressure 85 MPa, injection speed 15 mm / sec, injection time 17 sec, cooling time 25 sec. A base plate with a thickness of 3 mm was produced by injection molding. A skin material was prepared in the same manner as in Example 8 except that the water-absorbing water-based powder paint prepared in Example 2 was directly applied onto the base plate. The projected area occupied by the water-absorbent powder was 0.5%, and the average interparticle distance was 166.7 μm.

(Comparative Example 1)
A skin material was prepared in the same manner as in Example 1 except that the paint did not contain water-absorbing powder.

  Table 1 shows the results of tactile sensation evaluation and appearance evaluation using the obtained skin material.

  In Examples 1 to 12, it was possible to improve the tactile sensation without impairing the appearance.

It is a cross-sectional schematic diagram of the skin material of this invention. It is the schematic which shows 1st Embodiment of the processing method of the skin material of this invention. It is the schematic which shows 2nd Embodiment of the processing method of the skin material of this invention. It is the schematic which shows 3rd Embodiment of the processing method of the skin material of this invention.

Explanation of symbols

10 water-absorbing powder,
20 substrate,
30 coating film,
31 paint,
100 etching process,
200 Scattering section.

Claims (13)

A skin material comprising a base material and a water-absorbing powder,
A skin material characterized in that the water-absorbing powder protrudes from the surface.   The skin material according to claim 1, wherein a coating film is laminated on the base material.   The skin material according to claim 1 or 2, wherein the base material is a resin.   The skin material according to claim 1 or 2, wherein the base material is genuine leather and / or artificial leather.   The skin material according to any one of claims 1 to 4, wherein the water-absorbing powder comprises a water-absorbing polymer.   The skin material according to any one of claims 1 to 5, wherein the protruding portion of the water-absorbing powder is 1/3 or less of the volume of the water-absorbing powder.   The skin material according to any one of claims 1 to 6, wherein the water-absorbing powder has an average particle size of 20 µm or less.   The skin material according to any one of claims 1 to 7, wherein a projected area occupied by the water-absorbing powder on the surface is 12.0% or less.   The skin material according to any one of claims 1 to 8, wherein an average interparticle distance of the water-absorbing powder is 33 to 250 µm. Forming a substrate containing water-absorbing powder;
And a step of causing the water-absorbing powder to protrude by etching the base material. Forming a coating film containing water-absorbing powder on a substrate;
And a step of causing the water-absorbing powder to protrude by etching the coating film. Applying a paint to the substrate;
And a step of spraying water-absorbing powder on the paint before the paint is solidified.   A vehicle comprising the skin material according to claim 1 or the skin material manufactured by the method according to claims 10 to 12.

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