JP2003154605A - Laminated sheet, laminate and laminate manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laminated sheet having wide molding conditions, good product appearance and good preparatory shaping properties, and also to provide a laminate and a laminate manufacturing method. SOLUTION: The laminated sheet 1 is formed into an integrated two-layered structure. A surface woody layer 2 based on natural wood and a back adhesive layer 3 containing an adhesive having adhesiveness with respect to a thermoplastic resin composition are brought into direct contact with each other, or formed into an integrated three-layered structure. A reinforcing layer 4 having flexibility is interposed between the surface woody layer 2 and the back adhesive layer 3 not only to mutually bring the woody layer 2 and the reinforcing layer 4 to a direct contact state, but also to mutually bring the reinforcing layer 4 and the adhesive layer 3 to a direct contact state. The reinforcing layer 4 comprises, for example, a nonwoven fabric, and the adhesive layer 3 comprises, for example, the nonwoven fabric and an adhesive infiltrated into the nonwoven fabric. The laminate comprises the laminated sheet 1 and a molded object made of a thermoplastic resin composition directly brought into contact with the adhesive layer 3 on the back surface side of the laminated sheet 1 to be integrated therewith.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated sheet having on its surface a wood layer mainly composed of natural wood, and a laminated body in which a molded product made of a thermoplastic resin composition is laminated and integrated on the back side of the laminated sheet, The present invention relates to a method for manufacturing the laminated body.

[0002]

2. Description of the Related Art In recent years, particularly in the automobile field, center clusters, console uppers, ornament door trims, etc., which are interior parts of automobiles, have a design surface provided with a laminated sheet made of natural wood having excellent design properties (laminate). Is increasing.

For example, a laminated body is manufactured as follows (see, for example, Patent Document 1 and Patent Document 2).
A natural wood such as walnut or maple, which is excellent in design, is sliced into 0.1 to 0.2 mm, and a non-woven sheet or aluminum thin plate for reinforcement is attached to the sliced veneer. Further, a laminated sheet is prepared by lining this veneer with a mangashirono material of natural wood and the like for the purpose of ensuring adhesion in the step of laminating and integrating with the thermoplastic resin composition. This laminated sheet is cut into a desired shape, and the laminated sheet is set along the inner surface of the mold cavity. Then, the molten thermoplastic resin composition is injected and injected into the mold cavity to obtain a laminate having this laminated sheet.

The above laminated body is excellent in designability as it is, but in the case of automobile interior parts, in order to further improve the designability and weather resistance, moisture resistance and scratch resistance, a colored coating or Clear coating such as polyester resin is applied.

In addition, in Patent Document 3, a laminated body is manufactured as follows. For natural wood such as walnut or maple, sliced into 0.1 to 0.2 mm slices of natural wood, either impregnated with a thermoplastic resin composition or treated with an alkali, and reinforced with a lining material A laminated sheet is prepared by laminating them. Further, the laminated sheet is set along the inner surface of the mold cavity, and the molten thermoplastic resin composition is injected and injected into the mold cavity to obtain a laminated body having the laminated sheet.

[0006]

[Patent Document 1] Japanese Patent Publication No. 5-58890

[Patent Document 2] Japanese Patent Laid-Open No. 1-64817

[Patent Document 3] Japanese Patent Publication No. 7-55515

[0007]

[Problems to be Solved by the Invention] However, the design surface shapes of automobile interior parts such as center clusters, console uppers, and ornament door trims are becoming three-dimensional more and more. In some cases, it may be difficult to set a laminated sheet having the above-mentioned shape along the inner surface of the mold cavity. In addition, when the thermoplastic resin composition is laminated and integrated on the laminated sheet in the manufacturing process of the laminated body, cracks may occur in the wood layer.

As a method of preventing the cracks, a method of preliminarily shaping the laminated sheet by hot pressing or the like is known. However, this method is not an effective measure because it causes cracks in the pre-forming step. Alternatively, as in Patent Document 3, a method of impregnating a wood sheet with a thermoplastic resin composition or performing an alkali treatment is known. However, this method requires a long time for impregnation of the thermoplastic resin composition and alkali treatment, and there is little effect obtained even though they are complicated steps.

By the way, in the step of laminating and integrating to obtain a laminated body, the adhesion between the laminated sheet having a backing material made of natural wood such as mangashirono wood and the thermoplastic resin composition is anchor effect (adhesion due to unevenness). Effect). In this case, in order to obtain a constant adhesion strength between the backing material and the thermoplastic resin composition, the molten thermoplastic resin composition must be pressed against the backing material at high pressure. Therefore, there is a problem inevitably that the range of molding conditions at the time of stacking and integration becomes narrow.

On the other hand, in the case of the method of applying the primer treatment shown in Patent Document 3 to improve the adhesion, the dramatic effect was not obtained although the primer treatment step was added and the number of steps was increased.

Further, in the case of a laminated sheet having a backing material made of natural wood, in a laminate obtained by laminating and integrating with a thermoplastic resin composition, the backing material is provided on the surface of the thermoplastic resin composition near the mouth of the laminated sheet. Sometimes small pieces were scattered. This phenomenon is due to the fact that a small piece of the backing material, which was peeled off due to the pressure of the thermoplastic resin composition during the integration of the layers, appeared on the surface of the thermoplastic resin composition. These scattered pieces are
Since it becomes a defect in appearance, it has to be removed, and there is a problem that the number of removing steps increases and the manufacturing cost increases.

The present invention adopts a laminated structure which does not use a wood sheet such as mangashirono material which is a lining material of a natural wood laminated sheet, solves the above-mentioned problems, has a wide molding condition width and a good product appearance. The purpose is to have good preformability.

[0013]

The present invention will be described with reference to the reference numerals in the drawings (FIGS. 1 to 6) of the embodiment described later. * The inventions of claims 1 to 10 relate to the laminated sheet (1).

Laminated sheet (1) according to the invention of claim 1
In the above, a wood layer (2) mainly composed of natural wood and sliced to a predetermined thickness and an adhesive layer (3) having an adhesive having adhesiveness to a thermoplastic resin composition are provided, and the wood layer (2 ) And this adhesive layer (3) are laminated and integrated with each other to expose the wood layer (2) to the surface side,
The adhesive layer (3) is exposed on the back surface side.

In the second aspect of the invention, the wood layer (2) and the adhesive layer (3) according to the first aspect of the invention are in direct contact with each other to form a two-layer structure. In the invention of claim 3, the reinforcing layer (4) having flexibility is interposed between the wood layer (2) and the adhesive layer (3) according to the invention of claim 1, and the wood layer (2) is provided. And the reinforcing layer (4) are in direct contact with each other, and the reinforcing layer (4) and the adhesive layer (3) are in direct contact with each other, and the wood layer (2) and the reinforcing layer (4) are in contact with each other. ) And this adhesive layer (3) are laminated together to form a three-layer structure.

In the invention of claim 4, the reinforcing layer (4) according to the invention of claim 3 has a thickness of 0.1 to 0.4 mm. In the invention of claim 5, the reinforcing layer (4) according to the invention of claim 3 or 4 is made of a nonwoven fabric.

In the invention of claim 6, the wood layer (2) according to the invention of any one of claims 1 to 5 has a thickness of 0.1 to 0.4 mm, and the same adhesive layer ( The thickness of 3) was 0.05 to 0.2 mm.

In the invention of claim 7, the adhesive layer (3) according to any one of claims 1 to 6 is formed from a nonwoven fabric and an adhesive impregnated in the nonwoven fabric. Configured.

In the invention of claim 8, the adhesive of the adhesive layer (3) according to the invention of any one of claims 1 to 7 is made of an ABS resin (acrylic) which is a thermoplastic resin composition. Nitrile butadiene styrene resin).

In the invention of claim 9, the adhesive of the adhesive layer (3) according to the invention of any one of claims 1 to 8 is a hot melt adhesive. In the invention of claim 10, the hot melt adhesive which is the adhesive (3) according to the invention of claim 9 is made of polyester.

* The inventions of claims 11 to 12 relate to a laminate (5). The laminated body (5) according to the invention of claim 11 comprises a laminated sheet (1) according to the invention of any one of claims 1 to 10 and a back surface side of the laminated sheet (1). It comprises a molded body (6) made of a thermoplastic resin composition, which is brought into direct contact with and integrated with a certain adhesive layer (3).

In the twelfth aspect of the invention, the thermoplastic resin composition constituting the molded body (6) according to the eleventh aspect of the invention contains an ABS resin (acrylonitrile butadiene styrene resin).

* The invention of claims 13 to 16 relates to a method for producing a laminate (5). In the invention of claim 13, the laminate (5) is manufactured through the following steps. -A part of the laminated sheet (1) according to the invention of any one of claims 1 to 10 is cut out to obtain a laminated sheet (1a) for molding.

As shown in FIG. 5 (a), the wood layer (2) on the surface side of the forming laminated sheet (1a) is applied along the inner surface of the cavity (8a) of the forming die (8). Then, the molding laminated sheet (1a) is positioned on the molding die (8).

As shown in FIGS. 5 (b) and 5 (c), a molten state is present in the cavity (8a) in the molding space facing the adhesive layer (3) on the back surface side of the molding laminated sheet (1a). This adhesive layer (3) by supplying the thermoplastic resin composition of
Is directly contacted with the above to produce a laminated body (5) in which the molded body (6) made of the thermoplastic resin composition and the molding laminated sheet (1a) are integrated.

In the fourteenth aspect of the invention, the laminate (5)
Is manufactured through the following steps. As shown in FIGS. 3 (a), (b) and (c), after preliminarily shaping the laminated sheet (1) according to the invention of any one of claims 1 to 10. A part of this laminated sheet (1) is cut out to form a laminated sheet (1a) for molding, or as shown in FIGS. 4 (a) and 4 (b), one of claims 1 to 10. Part of the laminated sheet (1) according to the invention of claim 1 is cut out to obtain a forming laminated sheet (1a), and then the forming laminated sheet (1a) is preshaped.

As shown in FIG. 5 (a), the wood layer (2) on the surface side of the molding laminated sheet (1a) is applied along the inner surface of the cavity (8a) of the molding die (8). Then, the molding laminated sheet (1a) is positioned on the molding die (8).

As shown in FIGS. 5 (b) and 5 (c), a molten state is present in the cavity (8a) in the molding space facing the adhesive layer (3) on the back surface side of the molding laminated sheet (1a). This adhesive layer (3) by supplying the thermoplastic resin composition of
Is directly contacted with the above to produce a laminated body (5) in which the molded body (6) made of the thermoplastic resin composition and the molding laminated sheet (1a) are integrated.

In the invention of claim 15, the laminate (5)
Is manufactured through the following steps. -As shown in Fig. 6 (a), a molded body (6) is molded in advance with a thermoplastic resin composition.

As shown in FIGS. 6B and 6C, the adhesive layer (3) on the back surface side of the laminated sheet (1) according to the invention of any one of claims 1 to 10. ) Is directly contacted with the molded body (6) to thermoform the laminated sheet (1), and the molded body (6) and the laminated sheet (1) are integrated into a laminated body (5). To manufacture.

In the sixteenth aspect of the invention, the thermoplastic resin composition according to the thirteenth, fourteenth or fifteenth aspect of the invention contains an ABS resin (acrylonitrile butadiene styrene resin).

[0032]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. <Laminated Sheet 1 Shown in FIG. 1 (a)> The sectional structure of the laminated sheet 1 includes four types shown in FIGS. 2 (a) (b) (c) (d). The laminated sheet 1 shown in FIG. 2A and the laminated sheet 1 shown in FIG. 2B are both laminated in a two-layer structure in which the wood layer 2 and the adhesive layer 3 are in direct contact with each other. The wood layer 2 is integrated and exposed on the front surface side, and the adhesive layer 3 is exposed on the back surface side. In both the laminated sheet 1 shown in FIG. 2C and the laminated sheet 1 shown in FIG. 2D, the reinforcing layer 4 is interposed between the wood layer 2 and the adhesive layer 3, The wooden layer 2 and the reinforcing layer 4 are in direct contact with each other, and the reinforcing layer 4 and the adhesive layer 3 are in direct contact with each other, and the wooden layer 2 and the reinforcing layer 4 are in contact with each other. It has a three-layer structure in which the adhesive layer 3 and the adhesive layer 3 are laminated and integrated.

* Regarding each wood layer 2, each wood layer 2 is mainly made of natural wood. The natural tree is a raw tree cut from a primary forest or afforestation. Any kind of raw wood may be used, but from the viewpoint of designability, a kind of tree called a name tree is preferable. For example, Karamatsu, Yakusugi, Nara, 楡, Keyaki, Sakura, Tochi, Kusunoki, Katsura, Yellow 蘖, Kaede, Sophora, Sycamore, Rosewood, Teak, Mahogany, African Mahogany, Merranch, Kotan, Rosewood, American Black Walnut, Karin, Zebrawood, Brazilian Rose, Versimon, Silver Rose, Palma, Silky Oak, Silver Heart,
Thai Wanks, Cherry, Myrtle, Black Leo, White Leo,
Sapele, Bubinga, Macole, Madrona, maple, claro walnut, ash and the like are preferable.

The wood layer 2 mainly composed of natural wood is a natural wood sliced into a predetermined thickness, or a sliced natural wood impregnated with a thermoplastic resin composition. Any thermoplastic resin composition may be impregnated, but acrylic resin, polyvinyl chloride, vinyl acetate, ethylene-vinyl acetate copolymer, polyurethane and the like are preferable.

The wood layer 2 has a thickness of 0.1 to
0.4 mm is preferable, 0.1-0.3 mm is preferable, 0.1-0.2 mm is more preferable. 0.1 mm
When it is less than 1, the wood layer 2 becomes brittle, the handleability of the laminated sheet 1 is deteriorated, and the difficulty of slicing the natural wood becomes high. On the other hand, if the thickness exceeds 0.4 mm, the laminated sheet 1 becomes too rigid and lacks in flexibility. Therefore, the thermoplastic resin composition is laminated on the laminated sheet 1 in the manufacturing process of the laminated body 5 described later. When they are integrated with each other, cracks occur in the wood layer 2.

* Regarding the Adhesive Layer 3 The adhesive layer 3 of the laminated sheet 1 shown in FIGS. 2 (a) and 2 (c) is a layer 3a composed only of the adhesive described later. In addition, FIG.
The adhesive layer 3 of the laminated sheet 1 shown in (d) is a layer 3b in which a nonwoven fabric is impregnated with this adhesive.

The above-mentioned adhesive has adhesiveness to the thermoplastic resin composition when the thermoplastic resin composition is laminated on and integrated with the laminated sheet 1 in the manufacturing process of the laminate 5 described later. Any material may be used as long as it is selected appropriately. A hot melt adhesive, particularly a hot melt adhesive having adhesiveness to an ABS resin (acrylonitrile butadiene styrene resin), for example, a polyester-based hot melt adhesive is preferable. Alternatively, a pressure sensitive adhesive may be used.

Examples of the hot melt adhesive include ethylene vinyl acetate copolymer, ethylene ethyl acrylate copolymer, ethylene acrylic acid, polyester, atactic polypropylene, propylene ethylene copolymer, propylene ethylene butene-1 copolymer, At least one of polycarbonate, polyvinyl ether, polyurethane, styrene isoprene styrene copolymer, styrene butadiene styrene copolymer, styrene ethylene butylene styrene copolymer, styrene ethylene propylene styrene copolymer, butyl rubber, ethylene propylene rubber, and polyamide. The one that contains one is good.

As the pressure-sensitive adhesive, one containing at least one of natural rubber, styrene-butadiene rubber, silicone rubber, polyisobutylene, polyvinyl ether, and acrylic acid ester copolymer is preferable. .

The non-woven fabric is preferably made of various fibers such as rayon, nylon, polyester, acrylic, polyethylene, vinylon, polypropylene and cupra. The nonwoven fabric can improve the strength and flexibility of the laminated sheet 1.

The adhesive layer 3 has a thickness of 0.05 to
0.2 mm is preferable, and 0.05 to 0.1 mm is preferable. If it is less than 0.05 mm, the desired adhesion strength may not be obtained. On the other hand, if it exceeds 0.2 mm,
In some cases, cohesive failure occurs in the adhesive layer 3 and desired adhesion strength cannot be obtained.

* Regarding the Reinforcement Layer 4, the reinforcement layer 4 is preferably a non-woven fabric or paper having flexibility. As the non-woven fabric, those made of various fibers such as rayon, nylon, polyester, acrylic, polyethylene, vinylon, polypropylene and cupra are preferable. As the paper, Japanese paper, paper kraft paper, resin-impregnated paper and the like are preferable.

The reinforcing layer 4 has a thickness of 0.1 to
0.4 mm is preferable, and 0.1 to 0.2 mm is preferable. If it is less than 0.1 mm, the desired strength cannot be obtained. On the other hand, if the thickness exceeds 0.4 mm, the laminated sheet 1 becomes too rigid and lacks in flexibility. Therefore, the thermoplastic resin composition is laminated on the laminated sheet 1 in the manufacturing process of the laminated body 5 described later. When they are integrated with each other, cracks occur in the wood layer 2.

<Laminating Method of Laminating Sheet 1> * Laminating Method of Adhesive Layer 3 in Laminating Sheet 1 shown in FIGS. 2 (a) and 2 (c) Or the adhesive is applied to the wood layer 2 or the reinforcing layer 4 with a roller to form the adhesive layer 3. In the case of a polyester hot melt adhesive, the polyester hot melt adhesive is extrusion-laminated to the wood layer 2 or the reinforcing layer 4 to form the adhesive layer 3, or the polyester hot melt adhesive is previously prepared. After being processed into a film, the film polyester hot melt adhesive is heat laminated to the wood layer 2 or the reinforcing layer 4 to form the adhesive layer 3.

* Laminated sheet 1 shown in FIGS. 2 (b) and 2 (d)
In the laminating method of the adhesive layer 3, a liquid adhesive is applied to the nonwoven fabric in a mist state or an adhesive is applied by a roller, and the nonwoven fabric is attached to the wood layer 2 or the reinforcing layer 4 by hot pressing or the like. To form the adhesive layer 3. In the case of a polyester-based hot melt adhesive, the polyester-based hot melt adhesive is extrusion-laminated onto a non-woven fabric, and then the non-woven fabric is applied to the wood layer 2
Alternatively, it is attached to the reinforcing layer 4 by heat pressing or the like to form the adhesive layer 3. Alternatively, after the polyester hot melt adhesive is preliminarily processed into a film, the film polyester hot melt adhesive and the non-woven fabric are sequentially laminated on the wood layer 2 or the reinforcing layer 4 to heat-laminate the film. The adhesive layer 3 is made of a polyester hot melt adhesive and a non-woven fabric.

* The laminated sheet 1 shown in FIGS. 2 (c) and 2 (d)
In the method of laminating the reinforcing layer 4, a water-soluble adhesive is applied to a release substrate such as release paper or polyethylene film to adhere the reinforcing layer 4, and the water-soluble adhesive is applied on the reinforcing layer 4. The wood layers 2 are overlaid and they are attached by a heat press or the like. Then, the release substrate is peeled off.

<Laminate 5 shown in FIG. 1 (b)> This laminate 5 is manufactured by various methods described below, and directly contacts the above-mentioned various laminated sheets 1 and the adhesive layer 3 on the back side thereof. Molded body 6 made of a thermoplastic resin composition
Consists of.

As the thermoplastic resin composition constituting this molded body 6, any thermoplastic resin composition may be used so long as it can be bonded to the adhesive layer 3 of the various laminated sheets 1 described above, and it is appropriately selected and used.

Examples of the thermoplastic resin composition include acrylonitrile butadiene styrene resin, acrylonitrile styrene acrylate, polyamide, polycarbonate, polyethylene, polyethylene terephthalate,
Polybutyl terephthalate, polymethyl methacrylate,
Polyacetal, polypropylene, polystyrene, polyvinyl acetate, polyvinyl alcohol, polyvinyl chloride,
It is preferable that at least one of polyvinylidene chloride is contained. Preferably, among acrylonitrile butadiene styrene resin, acrylonitrile styrene acrylate, polyamide, polycarbonate, polyethylene, polyethylene terephthalate, polybutyl terephthalate, polymethyl methacrylate, polyacetal, polypropylene, polystyrene,
It is good that at least one of them is included.

<Manufacturing Method of Laminate 5> * Manufacturing Method of Laminate 5 shown in FIGS. 3 and 5 First, as shown in FIGS. 3 (a) and 3 (b), a thermoforming mold is applied to each of the laminated sheets 1. After preliminarily shaping according to 7, a part of the laminated sheet 1 is cut out as shown in FIG. Next, FIG.
As shown in (a) and (b), the wood layer 2 on the surface side of the forming laminated sheet 1a is applied along the inner surface of the cavity 8a of the forming die 8 to form the forming laminated sheet 1a. Position in mold 8. After that, as shown in FIG. 5C, the molding laminated sheet 1 is formed in the cavity 8a.
The thermoplastic resin composition in a molten state is supplied to the molding space facing the adhesive layer 3 on the back surface side of a and is brought into direct contact with the adhesive layer 3. As the molding means, a conventionally known one such as injection molding is adopted. And FIG. 5 (d)
As shown in, a part of the molded product taken out from the molding die 8 is cut to obtain the laminated body 5.

* Manufacturing Method of Laminated Body 5 Shown in FIGS. 4 and 5 First, as shown in FIG. 4 (a), a part of each of the various laminated sheets 1 is cut out and used as a material for the laminated sheet for molding 1 a. Next, as shown in FIG. 4 (b), this material is preshaped by a thermoforming die 7 to form a laminated sheet 1a for molding.
And After that, as shown in FIGS. 5A, 5B, 5C, and 5D, mold molding is performed in the same manner.

* Manufacturing Method of Laminated Body 5 Shown in FIG. 6 First, the molded body 6 which is a part of the laminated body 5 is molded in advance by molding means such as injection molding. Then, as shown in FIG. 6A, the molded body 6 is set in the thermoforming die 7. Next, as shown in FIG. 6B, various laminated sheets 1 that have been softened by heating are thermoformed, and the adhesive layer 3 on the back surface side is directly brought into contact with the molded body 6 to be attached. . afterwards,
As shown in FIG. 6C, a part of the laminated sheet 1 is cut out to form a laminated body 5.

[Examples and Comparative Examples] Next, in order to evaluate the effects of the present invention, the results of comparing Examples 1 to 4 below and Comparative Example 1 below are shown in Table 1 below, and in Example 5 below. The results of comparison with Comparative Example 2 described below are shown in Table 2 below.

[0054]

[Table 1]

[0055]

[Table 2] By the way, in Tables 1 and 2 above, 2 is a wood layer, 3
a is an adhesive layer made of only an adhesive, 3b is an adhesive layer in which a nonwoven fabric is impregnated with an adhesive, 4 is a reinforcing layer, and M is a backing layer made of mangashirono material.

* Example 1 A wood sheet of Claro walnut (manufactured by Kitasan Co., Ltd., thickness: 0.1 mm) obtained by slicing raw wood, and a polyester hot melt adhesive film (Cranbetter G
With 5PP separator, Kurashiki Spinning Co., Ltd., thickness 0.05mm, melting point 107 ° C, MFR 40g / min)
And prepare. With this adhesive film, the side without the PP separator and this wood sheet are laminated so as to face each other, and this wood sheet and this adhesive film are sandwiched between two stainless steel flat plates having a thickness of 0.5 mm. Then, this sandwich is inserted between the flat hot plates heated to 140 ° C., and pressed at a pressure of 1 × 9.8 / 10 ⁴ Pa (1 Kgf / cm ² ) for 90 seconds. Next, the sandwiched product was taken out from the hot plate, cooled at room temperature, and then the PP separator was peeled off to obtain a laminated sheet 1.

This laminated sheet 1 was cut into a size of 70 × 100 mm, and a flanged 70 × 100 × 3.2 m was prepared.
The laminated sheet 1 is set so that the wood layer 2 of Claro walnut is along the inner surface of the cavity of the m flat plate mold. After closing the mold, a polycarbonate ABS alloy resin (Techniace PAX-1420 manufactured by Nippon A & L Co., Ltd.) heated and melted at 260 ° C. was injected and injected into the mold cavity, and this laminated sheet 1 and the polycarbonate ABS alloy resin were injected. And were laminated and integrated to obtain a laminated body 5.

* Example 2 A wood sheet of Claro walnut (manufactured by Kitasan Co., Ltd., thickness 0.1 mm) obtained by slicing raw wood, a nylon nonwoven fabric (thickness 0.1 mm), and a polyester hot melt adhesive film ( Cranbetter G-5PP with separator, Kurashiki Spinning Co., Ltd., thickness 0.05 mm, melting point 107 ° C., MFR 40 g / min) are prepared. First, the wood sheet and the nylon non-woven fabric are laminated, and the adhesive film is laminated so that the side not having the PP separator and the nylon non-woven fabric face each other. The film and the film are sandwiched by two stainless steel plates having a thickness of 0.5 mm. After that, this sandwich was inserted between flat heating plates heated to 140 ° C. and 1 × 9.8 / 10 ⁴ Pa (1 Kgf /
Press for 90 seconds with a pressure of cm ² ). Next, the sandwiched product was taken out from the hot plate, cooled at room temperature, and then the PP separator was peeled off to obtain a laminated sheet 1.

This laminated sheet 1 was cut into a size of 70 × 100 mm, and a flanged 70 × 100 × 3.2 m was prepared.
The laminated sheet 1 is set so that the wood layer 2 of Claro walnut is along the inner surface of the cavity of the m flat plate mold. After closing the mold, a polycarbonate ABS alloy resin (Techniace PAX-1420 manufactured by Nippon A & L Co., Ltd.) heated and melted at 260 ° C. was injected and injected into the mold cavity, and this laminated sheet 1 and the polycarbonate ABS alloy resin were injected. And were laminated and integrated to obtain a laminated body 5.

* Example 3 A wood sheet of claro walnut (thickness 0.1 mm) obtained by slicing raw wood and a nylon non-woven fabric coated with a water-soluble adhesive (corresponding to the reinforcing layer 4) were hot-pressed. Attached to each other, veneer (Japanese Patent Publication Sho 61-53)
The Kitasan Co., Ltd. decorative veneer sheet described in No. 204, thickness 0.25 mm) is prepared, and a polyester hot melt adhesive film (Cranbetter G-5PP) is prepared.
With separator, Kurashiki Spinning Co., Ltd., thickness 0.05m
m, melting point 107 ° C., MFR 40 g / min). With this adhesive film, the side without the PP separator and the nylon nonwoven fabric (the portion corresponding to the reinforcing layer 4) of this veneer are laminated so as to face each other, and the veneer and this adhesive film are made to have a thickness of 0. It is sandwiched between two 5 mm stainless steel flat plates and stacked. Then, insert this sandwich between flat heating plates heated to 140 ° C. and 1 × 9.8 / 1.
Pressurize at a pressure of 0 ⁴ Pa (1 Kgf / cm ² ) for 90 seconds. Next, the sandwiched product was taken out from the hot plate, cooled at room temperature, and then the PP separator was peeled off to obtain a laminated sheet 1.

This laminated sheet 1 is cut into a size of 70 × 100 mm, and is provided with a flange 70 × 100 × 3.2 m
The laminated sheet 1 is set so that the wood layer 2 of Claro walnut is along the inner surface of the cavity of the m flat plate mold. After closing the mold, a polycarbonate ABS alloy resin (Techniace PAX-1420 manufactured by Nippon A & L Co., Ltd.) heated and melted at 260 ° C. was injected and injected into the mold cavity, and this laminated sheet 1 and the polycarbonate ABS alloy resin were injected. And were laminated and integrated to obtain a laminated body 5.

* Example 4 A wood sheet of claro walnut (thickness 0.1 mm) obtained by slicing raw wood and a nylon nonwoven fabric coated with a water-soluble adhesive (corresponding to the reinforcing layer 4) were subjected to hot pressing. Attached to each other, veneer (Japanese Patent Publication Sho 61-53)
The Kitasan Co., Ltd. decorative veneer sheet described in No. 204, thickness 0.25 mm) is prepared, and the nylon nonwoven fabric (thickness 0.1 mm) and the polyester hot melt adhesive film (corresponding to the adhesive layer 3) are prepared. Cranbetter G-5PP with separator, Kurashiki Spinning Co., Ltd.,
Thickness 0.05mm, melting point 107 ° C, MFR 40g / mi
n) is prepared. First, the single-ply nylon nonwoven fabric (the portion corresponding to the reinforcing layer 4) and the nylon nonwoven fabric (the portion corresponding to the adhesive layer 3) are superposed, and the adhesive film does not have the PP separator side and the nylon nonwoven fabric. (A portion corresponding to the adhesive layer 3) is laminated so as to face each other, and these are sandwiched by two stainless steel flat plates having a thickness of 0.5 mm. After that, this sandwich is inserted between flat heating plates heated to 140 ° C. and 1 × 9.8 / 10 ⁴ Pa (1K
Pressurize at a pressure of gf / cm ² ) for 90 seconds. Next, the sandwiched product was taken out from the hot plate, cooled at room temperature, and then the PP separator was peeled off to obtain a laminated sheet 1.

This laminated sheet 1 was cut into a size of 70 × 100 mm, and a flanged 70 × 100 × 3.2 m was used.
The laminated sheet 1 is set so that the wood layer 2 of Claro walnut is along the inner surface of the cavity of the m flat plate mold. After closing the mold, a polycarbonate ABS alloy resin (Techniace PAX-1420 manufactured by Nippon A & L Co., Ltd.) heated and melted at 260 ° C. was injected and injected into the mold cavity, and this laminated sheet 1 and the polycarbonate ABS alloy resin were injected. And were laminated and integrated to obtain a laminated body 5.

Comparative Example 1 A wood sheet of claro walnut (thickness 0.1 mm) obtained by slicing raw wood and a nylon non-woven fabric coated with a water-soluble adhesive (corresponding to the reinforcing layer 4) were hot-pressed. Attached to each other, veneer (Japanese Patent Publication Sho 61-53)
A decorative veneer sheet manufactured by Kitasan Co., Ltd., having a thickness of 0.25 mm) described in Japanese Patent No. In order to obtain an anchor effect (adhesion effect due to unevenness) at the time of lamination and integration with a thermoplastic resin composition, a backing layer M made of mangashirono material is laminated on this single-sheet nylon nonwoven fabric (corresponding to the reinforcing layer 4). And laminated sheet 1 (made by Kitasan Co., Ltd., thickness 0.35 m
m). This laminated sheet 1 is cut into a size of 70x100 mm and has a flange 70x100x3.2 m
The laminated sheet 1 is set so that the wood layer 2 of Claro walnut is along the inner surface of the cavity of the m flat plate mold. After closing the mold, a polycarbonate ABS alloy resin (Techniace PAX-1420 manufactured by Nippon A & L Co., Ltd.) heated and melted at 260 ° C. was injected and injected into the mold cavity, and this laminated sheet 1 and the polycarbonate ABS alloy resin were injected. And were laminated and integrated to obtain a laminated body 5. * Example 5 A wood sheet (thickness: 0.1 mm) of claro walnut obtained by slicing raw wood and a nylon non-woven fabric coated with a water-soluble adhesive (corresponding to the reinforcing layer 4) are pasted together by heat pressing. In addition, a single plate (Japanese Patent Publication Sho 61-53)
The Kitasan Co., Ltd. decorative veneer sheet described in Japanese Patent No. 204, thickness 0.25 mm) is prepared, and a polyester-based hot melt adhesive film (Cranbetter G-5PP) is prepared.
With separator, Kurashiki Spinning Co., Ltd., thickness 0.05m
m, melting point 107 ° C., MFR 40 g / min). With this adhesive film, the side without the PP separator and the nylon nonwoven fabric (the portion corresponding to the reinforcing layer 4) of this veneer are laminated so as to face each other, and the veneer and this adhesive film are made to have a thickness of 0. It is sandwiched between two 5 mm stainless steel flat plates. After that, this sandwich is inserted between flat heating plates heated to 140 ° C. and 1 × 9.8 / 10 ⁴ Pa (1K
Pressurize at a pressure of gf / cm ² ) for 90 seconds. Next, the sandwiched product was taken out from the hot plate, cooled at room temperature, and then the PP separator was peeled off to obtain a laminated sheet 1.

This laminated sheet 1 is applied to an automobile shift knob
The wood of this laminated sheet 1 cut into the design development shape of the member
After preliminarily moistening the quality layer 2, heat preheated to 100 ° C
0.1 x 9.8 / 10 of this laminated sheet 1 by a die
^FourPa (0.1 Kgf / cm ²) Pressure for 120 seconds
Preliminary shaping was performed by pressing. Then, the pre-shaped laminated sheet
1 on the inner surface of the cavity of the injection mold.
Place this laminated sheet 1 so that the lunate wood layer 2 is along.
set. After closing this mold, heat and melt to 260 ℃
Polycarbonate ABS alloy resin (Japan Aian
Techniace PAX-1420 made by Dwell Co., Ltd.
It is injected and injected into the mold cavity and the laminated sheet 1 and po
Laminated and integrated with polycarbonate ABS alloy resin
A layered body 5 was obtained.

Comparative Example 2 A wood sheet of claro walnut (thickness 0.1 mm) obtained by slicing raw wood and a nylon nonwoven fabric coated with a water-soluble adhesive (corresponding to the reinforcing layer 4) were hot-pressed. Attached to each other, veneer (Japanese Patent Publication Sho 61-53)
A decorative veneer sheet manufactured by Kitasan Co., Ltd., having a thickness of 0.25 mm) described in Japanese Patent No. In order to obtain an anchor effect (adhesion effect due to unevenness) at the time of lamination and integration with a thermoplastic resin composition, a backing layer M made of mangashirono material is laminated on this single-sheet nylon nonwoven fabric (corresponding to the reinforcing layer 4). And laminated sheet 1 (made by Kitasan Co., Ltd., thickness 0.35 m
m). This laminated sheet 1 was cut into a design-developed shape of an automobile shift knob decorative member, the wood layer 2 of this laminated sheet 1 was moistened, and then the laminated sheet 1 was heated to 100 ° C. to obtain 5 × 9. 8/10 ⁴ P
Preliminary shaping was performed by applying a pressure of a (5 Kgf / cm ² ) for 10 minutes. Next, the preformed laminated sheet 1 is set such that the wood layer 2 of Claro walnut is along the inner surface of the cavity of the injection molding die. After closing the mold, a polycarbonate ABS alloy resin (Techniace PAX-1420 manufactured by Nippon A & L Co., Ltd.) heated and melted at 260 ° C. was injected and injected into the mold cavity, and this laminated sheet 1 and the polycarbonate ABS alloy resin were injected. And were laminated and integrated to obtain a laminated body 5.

* Evaluation of the Effect of the Present Invention The evaluation methods relating to the molding condition width, product appearance and preliminary shapeability shown in the above table are as follows.

With respect to the molding condition width, the laminated sheet 1 is set along the inner surface of the mold cavity, the mold is closed, and then the heat-melted thermoplastic resin composition is injected and injected into the mold cavity. Judging from the maximum injection pressure generated in some cases, the lower the maximum injection pressure, the wider the molding condition range.

Regarding the product appearance, in the laminate 5 obtained by laminating and integrating the laminated sheet 1 and the thermoplastic resin composition, a small piece of the backing material appeared on the surface of the thermoplastic resin composition near the mouth of the laminated sheet 1. Judge by the presence or absence of

Preliminary shapeability is judged by the pressure and time required for preforming the laminated sheet 1 by hot pressing and the cracks that may occur in that case, and the desired shape can be obtained at low pressure and for a short time. It is considered to be good if it can be shaped into and has no cracks.

Judging by the above evaluation method, it can be seen that Examples 1 to 5 are improved over Comparative Examples 1 and 2 in terms of molding condition width, product appearance and preformability.

[0072]

According to the laminated sheet (1) of the present invention, a thermoplastic resin composition is used in place of a wood sheet such as mangashirono material which has been conventionally used as a backing material for laminated sheets. The adhesive layer (3) having an adhesive having adhesiveness to the (molded body 6) was adopted. Therefore, the laminated sheet (1) can be made flexible and preliminarily shaped into a desired shape. Further, the thermoplastic resin composition (molded body 6) is pressed against the adhesive layer (3) under high pressure in order to obtain a constant adhesion strength between the laminated sheet (1) and the thermoplastic resin composition (molded body 6). A layered product (5) according to the invention of claims 11 to 12, in which a constant adhesion strength can be obtained due to the adhesiveness of the adhesive layer (3) itself to the thermoplastic resin composition (molded product 6) while eliminating the need.
In the case of manufacturing the product, the molding condition range is widened, and scattered small pieces due to peeling from the wood sheet, which has been a problem in the past, do not appear on the surface of the molded product (6) of the laminated body (5), and excellent designability is obtained. Can have Further, claim 1
The method for producing a laminate (5) according to the inventions 3 to 16 is suitable for producing the laminate (5).

[Brief description of drawings]

FIG. 1A is a perspective view showing an entire laminated sheet according to this embodiment, and FIG. 1B is a perspective view showing an entire laminated body according to this embodiment.

FIG. 2 is an enlarged schematic view showing a laminated sectional structure of various laminated sheets.

FIG. 3 is a process drawing showing a preliminary shaping method for the laminated sheet.

FIG. 4 is a process diagram showing a method of preliminarily shaping the laminated sheet.

FIG. 5 is a process drawing showing the method for manufacturing the above-mentioned laminated body.

FIG. 6 is a process drawing showing the method for manufacturing the above-mentioned laminated body.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Laminated sheet, 1a ... Laminated sheet for molding, 2 ... Wood layer, 3 ... Adhesive layer, 4 ... Reinforcing layer, 5 ... Laminated body, 6 ... Thermoplastic resin composition molded body, 8 ... Mold, 8a ... cavity.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ identification code FI theme code (reference) B32B 27/04 B32B 27/04 A C09J 7/02 C09J 7/02 Z 167/00 167/00 F term ( Reference) 4F100 AK41B AK41G AK74D AK74G AP01A BA03 BA04 BA07 BA10A CB03B DG15C EH36 EJ82C GB33 JL11B JL12B 4F206 AA13 AD06 AD08 AD16 AD20 AD27 AG03 CA1 CA01 CA01 CA01 CA01 CA01 CA01 CA01 CA02 CA01 CA02 CA01 CA02 CA01 CA02 CA01 CA02 CA01 CA02 CA01 CA02 CA01 CA01 CA01 CA01 CA01 CA01 DA101 DA111 DA121 DA141 DD051 DF041 DM011 ED001 EF001 EG001 EK031 EL021 JA09 JB01 JB09 LA06 MA08 MA10 MB02 NA11

Claims (16)

[Claims] 1. A wood layer, which is mainly composed of natural wood and is sliced to a predetermined thickness, and an adhesive layer having an adhesive having adhesiveness to a thermoplastic resin composition. The wood layer and the adhesive layer are provided. A laminated sheet, which is laminated and integrated with each other to expose the wood layer on the front surface side and the adhesive layer on the back surface side. 2. The laminated sheet according to claim 1, wherein the wood layer and the adhesive layer are in direct contact with each other to form a two-layer structure. 3. A reinforcing layer having flexibility is interposed between the wood layer and the adhesive layer to bring the wood layer and the reinforcing layer into direct contact with each other, and the reinforcing layer and the adhesive layer. 2. The laminated sheet according to claim 1, wherein the wood layers, the reinforcing layers, and the adhesive layers are laminated on each other so as to be in direct contact with each other to form a three-layer structure. 4. The thickness of the reinforcing layer is 0.1 to 0.4 mm.
The laminated sheet according to claim 3, wherein 5. The laminated sheet according to claim 3, wherein the reinforcing layer is made of a non-woven fabric. 6. The wood layer has a thickness of 0.1 to 0.4 mm.
The thickness of the adhesive layer is 0.05 to 0.2 mm, and the laminated sheet according to any one of claims 1 to 5. 7. The laminated sheet according to claim 1, wherein the adhesive layer comprises a non-woven fabric and an adhesive impregnated in the non-woven fabric. 8. The adhesive according to claim 1, wherein the adhesive of the adhesive layer has adhesiveness to an ABS resin (acrylonitrile butadiene styrene resin). Laminated sheet. 9. The laminated sheet according to claim 1, wherein the adhesive agent of the adhesive layer is a hot melt adhesive agent. 10. The laminated sheet according to claim 9, wherein the hot melt adhesive which is the adhesive is a polyester adhesive. 11. A thermoplastic resin which is integrated by directly contacting the laminated sheet according to any one of claims 1 to 10 with an adhesive layer on the back side of the laminated sheet. A laminated body comprising a molded body made of the composition. 12. The laminate according to claim 11, wherein the thermoplastic resin composition forming the molded body contains an ABS resin (acrylonitrile butadiene styrene resin). 13. A laminated sheet for molding, which is obtained by cutting out a part of the laminated sheet according to any one of claims 1 to 10 to form a wood layer on the front surface side of the laminated sheet for molding. The molding laminated sheet is positioned so as to fit along the inner surface of the cavity of the molding die in the molding die, and melted in the molding space facing the adhesive layer on the back side of the molding laminated sheet in the cavity. The thermoplastic resin composition in the state is supplied to directly contact the adhesive layer,
A method for producing a laminated body, comprising producing a laminated body in which a formed body made of the thermoplastic resin composition and the forming laminated sheet are integrated. 14. A laminated sheet for molding according to any one of claims 1 to 10, which is obtained by subjecting the laminated sheet according to any one of claims 1 to 10 to preliminary shaping and then cutting out a part of the laminated sheet. Alternatively, a part of the laminated sheet according to any one of claims 1 to 10 is cut out to form a laminated sheet for molding, and then preliminary shaping is performed on the laminated sheet for molding, The wood layer on the front surface side of the molding laminated sheet is applied along the inner surface of the cavity of the molding die to position this molding laminated sheet in the molding die, and the back surface side of the molding laminated sheet in the cavity. The thermoplastic resin composition in a molten state is supplied to the molding space facing the adhesive layer to directly contact the adhesive layer,
A method for producing a laminated body, comprising producing a laminated body in which a formed body made of the thermoplastic resin composition and the forming laminated sheet are integrated. 15. A molded body is molded in advance with a thermoplastic resin composition, and an adhesive layer on the back surface side of the laminated sheet according to claim 1 is attached to this molded body. A method for producing a laminated body, which comprises directly forming a thermoform of the laminated sheet by directly contacting with each other to produce a laminated body in which the formed body and the laminated sheet are integrated. 16. The method for producing a laminated body according to claim 13, 14 or 15, wherein the thermoplastic resin composition contains an ABS resin (acrylonitrile butadiene styrene resin).