JPH0131560Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to interior parts for automobiles, such as dash boards, glove boxes, instrument panel areas, console boxes, and rear parcels, which have a good appearance and outer surface feel and are weather resistant. It has excellent properties such as hardness, water resistance, and abrasion resistance, and its surface has low light reflectance, so it is especially useful when used as an interior material around the driver's seat in a car, reducing the stimulation of the driver's vision from outside the window. The object of the present invention is to provide an automobile interior member that has characteristics such as being able to be softened and that can be mass-produced using a combination of an embossing method, a vacuum forming method, and an injection molding method.

Conventionally, automobile interior parts such as dart boards, glove boxes, instrument panel areas, console boxes, and rear parcels in automobile interiors have been
Used are polyvinyl chloride sheets mixed with ABS resin, injection molded products made of molded products such as ABS resin sheets and polyvinyl chloride sheets lined with foamed polyurethane resin or foamed polypropylene resin, and injection molded products made of ABS resin and polypropylene. has been done. In particular, interior components such as instrument panels around the driver's seat are often exposed to direct sunlight, so it goes without saying that these components must be weather resistant, but at the same time In order to soften the visual stimulus from outside the window, it is desirable to lower the light reflectance of its surface. For this reason, efforts have been made to make the surfaces of automobile interior parts a faded surface with an uneven pattern, such as by embossing, or to make the outer surface layer of the interior parts a flocked synthetic resin sheet. However, in the former method, the light reflectance of the surface is still 4 to 5 or higher (according to Murakami glossmeter (75°)), which softens the stimulation of the driver's vision from outside the window. However, in the latter method, which uses flocked synthetic resin sheets, not only do the rayon fibers and nylon fibers that make up the flocked piles themselves have drawbacks in terms of weather resistance, but also the surface It has poor abrasion resistance, and furthermore, it cannot have a printed pattern on its surface, so it is not possible to express the decorative effect of coloring. When molding, deep drawing is difficult and it is not suitable for mass production.
None of them were satisfactory.

By adopting the structure described in the claims for utility model registration, the present invention has a good appearance and feel on the outer surface, excellent performance such as weather resistance, water resistance, abrasion resistance, etc., and also has an embossing means. It is also possible to provide a decorative effect by means of printing, and the light reflectance of the surface is low enough to soften the stimulation of the driver's vision from outside the window. An object of the present invention is to provide an automobile interior member having characteristics such as being able to be used in mass production.

Hereinafter, the structure of the automotive interior member of the present invention will be explained based on the drawings.

FIG. 1 is a cross-sectional view showing one example of the automotive interior member of the present invention, and FIG. 2 is a partially enlarged cross-sectional view illustrating the layer structure of the automotive interior member shown in FIG. 1.

The automotive interior component 1 of the present invention has a three-dimensional structure with an uneven configuration corresponding to the shape of each required location in the interior of the vehicle, and the entire automotive interior component 1 is shaped like the one shown in FIG. It is constructed of a laminated structure. That is, the automobile interior member 1 is made of a polyurethane elastomer sheet obtained by wet solvent extraction of a polyurethane elastomer using a polyether glycol component as a glycol component and an aliphatic diisocyanate component as an isocyanate component, and one side of the polyurethane elastomer sheet is subjected to a puff polishing treatment or a sanding treatment. A polyurethane elastomer layer 3 made of a polyurethane elastomer sheet having a suede-like surface 2 obtained by surface treatment such as the like, and a core layer 5 made of a thermoplastic synthetic resin or thermosetting synthetic resin sheet. are bonded and laminated via the printed layer 6, and the core layer has a multilayer laminated structure in which the synthetic resin backing layer is bonded and laminated, and the required portions of the polyurethane elastomer layer 3 are heated and laminated.
It is characterized by having a portion 7 which is melted under pressure to form a recessed portion and the bottom of the recessed portion is transparent.

Polyurethane elastomer layer 3 having a suede-like surface 2 in the automotive interior member 1 of the present invention
The polyurethane elastomer sheet that makes up the
Surface treatment is applied to a polyurethane elastomer sheet molded by a sheet molding method using a wet solvent extraction method using a commercially available polyurethane elastomer that uses polyether glycol as a glycol component and aliphatic diisocyanate as an isocyanate component. Generally, a coating agent consisting of a DMF solvent solution containing the polyurethane elastomer and a coloring pigment of an arbitrary hue is applied to a polyester film as a release sheet to form a film. The film-like polyurethane elastomer obtained by peeling off the polyester film as a release sheet is immersed in warm water to replace a portion of the DMF solvent in the film-like polyurethane elastomer with water, and then dried. By doing so,
It is obtained by molding a polyurethane elastomer sheet with a dense microporous structure introduced into the surface layer, and then performing puff polishing or sanding on one side of this sheet to a depth of approximately 0.08 to 0.10 mm. . The suede-like surface 2 in this polyurethane elastomer layer 3 is one side of the polyurethane elastomer sheet obtained by the wet solvent extraction method, that is, one side of the polyurethane elastomer sheet in which numerous dense microporous structures are formed in the surface layer. It is obtained by subjecting the surface layer to a puff polishing treatment or a sanding treatment to form numerous octopus-shaped recesses densely and uniformly in the surface layer.

Note that when the urethane elastomer sheet, one side of which is subjected to surface treatment such as puff polishing or sanding, is formed by the wet solvent extraction method as described above, a coating agent of the polyurethane elastomer component is applied onto the release sheet. By incorporating an arbitrary coloring pigment therein, it is possible to obtain a polyurethane elastomer layer 3 having a suede-like surface 2 exhibiting a desired hue. , calcium carbonate, clay, talc, titanium white, carbon black, barium sulfate, yellow lead, cadmium yellow, chrome vermilion, cadmium red, deep blue, ultramarine blue, iron oxide, alumina white, etc. Organic pigments include: Azo pigments such as Lake Red, Benzidine Yellow G, Azo Lake pigments such as Brilliant Scarlet G, Phthalocyanine pigments such as Phthalocyanine Blue and Phthalocyanine Green, Indanthrene Violet RH, Indanthrene Direct Black B, Indanthrene Brilliant. Orange GR, Indanthrene Brown BR, Indanthrene Orange RRTP, Threnic pigments such as Alizarin Lake, Quinacridone pigments such as Sinclair Sealed, PV Fast Violet BL
These include dioxazine pigments such as Dioxazine pigments, azochelate pigments such as Clean Gold, and the like. In addition, the coating agent for this polyurethane elastomer component may further contain casein, shellac, starch, protein, cellulose, acetylcellulose, acetylbutylcellulose, nitrocellulose, ethylcellulose, etc. as a binder, and other additives as necessary. It goes without saying that various plasticizers, waxes, greases, vaseline, desiccants, auxiliary desiccants, surfactants, fillers, etc. may be added or contained.

The printing layer 6 constituting the automobile interior member 1 of the present invention is printed using a conventional ink composition using a known printing method such as a gravure printing method, an offset gravure printing method, a silk screen printing method, or an offset printing method. This can be done by direct printing or by transfer printing using an appropriate releasable support. Typical printing ink compositions constituting the printing layer 6 include ethyl cellulose,
Cellulose derivatives such as ethyl hydroxyethyl cellulose, cellulose acetate propionate, cellulose acetate, styrene resins and styrene copolymer resins such as polystyrene, polyα-methylstyrene, polymethyl methacrylate, polyethyl methacrylate, polyethyl acrylate, polyacrylic Single or copolymer resins of acrylic or methacrylic resins such as butyl acid, rosin, rosin-modified maleic acid resins, rosin-modified phenolic resins, rosin ester resins such as polymerized rosin, polyvinyl acetate resins, coumaron resins, vinyl toluene resins, chloride A resin selected from vinyl resin, polyester resin, polyurethane resin, butyral resin, etc. in consideration of adhesion to the polyurethane elastomer sheet and the core layer described later is used, and an appropriate dyeing or pigment coloring agent is used for these resins. , plasticizers, stabilizers,
A material made by kneading a solvent etc. is used.

The printing layer 6 as described above may be provided on the back surface of the polyurethane elastomer sheet, or may be provided on the surface of the core layer described later. Furthermore, the printing layer does not need to completely cover the back surface of the polyurethane elastomer sheet or the surface of the core layer, but may have patterns scattered here and there, or one printing plate may be used. It may be one-color printing using multiple plates, or multi-color printing using multiple plates.

The outermost surface layer of the core layer 5 constituting the automobile interior member 1 of the present invention is composed of a polyurethane elastomer sheet constituting the polyurethane elastomer layer 3 having the suede-like surface 2 described above. In order to obtain the automotive interior member 1, the polyurethane elastomer sheet has the function of providing moldability and rigidity. Thermoplastic or A thin thermosetting sheet is utilized.

Further, the synthetic resin backing layer 4 made of sheet-like synthetic resin functions as a reinforcing layer in the automotive interior component 1 of the present invention, and includes, for example, a foamed polypropylene layer, a foamed polyurethane layer, Although it is preferable to use a foamed resin layer such as a foamed polyvinyl chloride layer, it does not necessarily have to be made of a foamed resin layer, and may be made of a solid synthetic resin layer.

The automotive interior component 1 of the present invention having a multilayer laminated structure is a polyurethane elastomer sheet having a suede-like surface in which a core layer 5 is attached via a printed layer 6 to provide moldability and rigidity. A dent is partially formed by embossing by heating and pressing using a gold roll or a press, and
A material obtained by making the bottom of the recess transparent by melting is used as a molding material, and this is molded into the desired three-dimensional shape by vacuum forming. It can be easily obtained by adhering and laminating synthetic resin constituting the synthetic resin backing layer 4 by injection molding or the like. Therefore, as for the molding order, it is preferable that a polyurethane elastomer sheet having a suede-like surface and a core sheet are bonded together and a laminated sheet is produced in advance as a molding material. A polyurethane elastomer layer 3 having a suede-like surface 2 used as a material for this molding.
The adhesion and lamination of the polyurethane elastomer sheet and the synthetic resin sheet that will form the core layer 5 are performed by applying a DMF solvent to the opposite side of the suede-like surface of the polyurethane elastomer sheet, and laminating the core sheet on that surface under pressure. This can be easily carried out by using a solvent lamination method, an adhesive lamination method using a synthetic resin adhesive such as a urethane adhesive, or the like.

The automotive interior component of the present invention has the above-mentioned structure, and its outermost surface layer uses polyether glycol as a glycol component, which can provide water resistance to the resulting product, and as an isocyanate component. A suede-like product obtained by performing a surface treatment such as puff polishing or sanding on one side of a polyurethane elastomer sheet using a wet solvent extraction method of polyurethane elastomer using an aliphatic diisocyanate that provides weather resistance to the resulting product. It is composed of a polyurethane elastomer layer made of a polyurethane elastomer sheet with a surface, and the suede-like surface of the layer is the outer surface, so it has a beautiful suede-like appearance and a pleasant feel to the touch. It is of good quality and gives a sense of high quality, and at the same time has excellent performance such as weather resistance, water resistance, and abrasion resistance.Moreover, the light reflectance of the surface is kept low due to the diffused reflection phenomenon of light due to the suede-like surface. Therefore, it has the effect of softening the stimulus from outside the window to the driver's vision.

In addition, in the automotive interior component of the present invention, the surface polyurethane elastomer sheet is heated and pressurized to form recesses in places, and the bottom of the recesses becomes transparent, so that the printed layer underneath the polyurethane elastomer sheet is transparent. Since the pattern can be seen through the transparent area, it is highly variable, and since the printed pattern is under the polyurethane elastomer sheet, the pattern will not be damaged by surface abrasion or washing, making it highly durable.

In addition, the automotive interior component of the present invention is a multilayer structure in which a polyurethane elastomer layer having a suede-like surface and a synthetic resin backing layer that serves as a reinforcement are bonded and laminated via a core layer made of a synthetic resin sheet. Since it has a laminated structure, vacuum forming using a polyurethane elastomer sheet is possible, and since it is suitable for welder forming, it also has the effect of being able to be mass-produced using a simple forming process. Hereinafter, a specific example of the structure of the automotive interior member of the present invention will be explained using manufacturing examples.

〔Example〕

Urethane resin that uses polyether polycarbonate glycol as the glycol component and aliphatic diisocyanate as the isocyanate component [manufactured by Dainippon Ink Chemical Co., Ltd.]
CRISVON〕100 parts by weight, CRISVON as a catalyst
ASSISTOR SD-14 [Manufactured by Dainippon Ink Chemical Co., Ltd.] 2
Weight part, CRISVON ASSISTOR which is also a catalyst
A composition containing 3 parts by weight of SD-81 [manufactured by Dainippon Ink Chemical Co., Ltd.], 100 parts by weight of indanthrene plaque, and 100 parts by weight of DMF was placed on a release sheet made of a polyester film with a thickness of 200μ. The film-like polyurethane elastomer obtained by applying the film to a thickness of 0.5 to 0.6 mm using the reverse coating method and then peeling off the polyester film as a release sheet is
By immersing the polyurethane elastomer in hot water at ~30°C, a portion of the DMF solvent in the film-like polyurethane elastomer is extracted into the water and replaced with water, resulting in a dense surface layer with a thickness of approximately 0.4 mm. A polyurethane elastomer sheet with a microporous structure was molded. One side of the obtained polyurethane elastomer sheet was subjected to a puff polishing treatment to a depth of approximately 0.08 mm, resulting in a polyurethane elastomer sheet having a suede-like surface in which numerous octopus-shaped recesses were introduced densely and uniformly into the surface layer. processed.

Thereafter, on the back side of the polyurethane elastomer sheet with the suede-like surface,
A flower pattern was previously printed on the surface of a separate ABS resin-containing polyvinyl chloride sheet of mm in size using a salt-vinyl acetate gravure ink, and then the printed layer was attached to the above two layers using a solvent adhesive method using a DMF solvent. This was sandwiched between two sheets and laminated to obtain an adhesive laminated sheet, which is a molding material, and is made of a polyurethane elastomer sheet and a polyvinyl chloride sheet and has a thickness of about 0.8 mm.

Next, the adhesive and laminated sheet obtained in the above process is used as a molding material, and vacuum formed into the desired three-dimensional shape using a vacuum forming mold having a three-dimensional structure corresponding to the shape of the desired location in the vehicle interior. did.

Subsequently, by injection molding foamed polyurethane resin from the back side (polyvinyl chloride sheet side) of the vacuum-formed product obtained in the above step, a synthetic resin backing layer consisting of a foamed polyurethane layer with a thickness of about 35 mm is formed. were adhered and laminated to obtain an automotive interior component of the present invention.

The light reflectance of the suede-like surface of the obtained automotive interior material was less than 0.5 [according to Murakami gloss meter (75°)], and it had excellent anti-reflection effect, and
The weather resistance test results were also good, and the feel and appearance of the outer surface had an extremely high quality feel.

At the same time, we were able to add a dust prevention function as well as a printed pattern with excellent design effects.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing one example of the automotive interior member of the present invention, and FIG. 2 is a partially enlarged cross-sectional view illustrating the layer structure of the automotive interior member shown in FIG. 1. DESCRIPTION OF SYMBOLS 1... Automotive interior member, 2... Suede-like surface, 3... Polyurethane elastomer layer, 4...
Synthetic resin backing layer, 5... core layer made of thermoplastic synthetic resin or thermosetting synthetic resin sheet, 6
...Print layer, 7...Transparent part.

Claims (1)

[Scope of utility model registration request] By performing surface treatment such as puff polishing or sanding treatment on one side of a polyurethane elastomer sheet using the wet solvent extraction method of a polyurethane elastomer that uses polyether glycol as the glycol component and aliphatic diisocyanate as the isocyanate component. The resulting polyurethane elastomer layer made of a polyurethane elastomer sheet having a suede-like surface and a core layer made of a thermoplastic synthetic resin or thermosetting synthetic resin sheet are bonded and laminated via a printed layer, and the core The layers have a multilayer laminated structure in which they are bonded and laminated with a synthetic resin backing layer, and the entire structure has a three-dimensional structure that corresponds to the shape of each required location in the vehicle interior. An interior member for an automobile, characterized in that the surface thereof is an outer surface, and has a concave portion in which a required portion of a polyurethane elastomer is melted and made transparent by heating and pressurization.