JP3335564B2 - Forming sheet and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to the interior of automobiles,
In articles such as office automation equipment and home appliances, housing, furniture, sanitary products, daily necessities, building materials and interior goods, it is molded so as to cover the parts that are often touched by humans, providing good contact feeling and luster to the articles. The present invention relates to a molding sheet giving an erased feeling and a method for producing the same.

[0002]

2. Description of the Related Art In the case of automotive interior materials and building interior materials, a coating material composed of a layer made of polyvinyl chloride has been used as a base material layer. The material requires a plurality of steps at the time of production and is difficult to recycle.In recent years, the material is composed of a mixture of an ethylene α-olefin copolymer rubber, a polypropylene resin, and a polyester resin, and is partially crosslinked. Sheets using an olefin-based thermoplastic elastomer layer as a base layer have come to be used.

[0003] However, this has a drawback that the use of an olefin-based thermoplastic elastomer results in poor abrasion resistance of the surface and, for example, scratches when touched by a person. Further, since the olefin-based thermoplastic elastomer contains oil in the composition, there is a problem that the surface becomes sticky as the temperature of the use environment rises and that the olefin-based thermoplastic elastomer is easily attacked by a hydrocarbon-based solvent or oil.

Japanese Patent Application Laid-Open No. 2-145331 discloses that an olefinic thermoplastic elastomer has a surface layer made of polyamide, polyurethane or polyester on the surface for the purpose of improving the solvent resistance, oil resistance and scratch resistance. A shaped body is disclosed.

[0005]

Problems to be Solved by the Invention
According to the configuration 1, the surface layer made of polyamide, polyurethane, or polyester improves the scratch resistance of the surface and makes the molded product less susceptible to hydrocarbon solvents and oils. May not provide sufficient oil resistance,
Polyamide and polyester often have insufficient scratch resistance.

SUMMARY OF THE INVENTION In view of the above, an object of the present invention is to provide a molding sheet which can give a good feeling of contact and matting to an article, and is excellent in both scratch resistance and oil resistance. It is assumed that.

[0007]

Means for Solving the Problems] molding sheet according to the present invention has been devised in order to achieve the above object, Ruatsumi 5~100μm such a urethane-based thermoplastic elastomer
Ruatsumi such from the front surface layer, polyamide or polyester
During layer in the 5 to 100 [mu] m, the adhesive layer, the substrate layer mainly composed of olefin-based thermoplastic elastomer is one that are laminated in this order.

[0008] The molding sheet according to the present invention may further have a foam layer laminated on the surface of the substrate layer opposite to the adhesive layer.

[0009] In the method of manufacturing the molding sheet according to the present invention, Ruatsumi 5 such a urethane-based thermoplastic elastomer
Front surface layer of ～100Myuemu, between layers in the Ruatsumi 5~100μm such polyamide or polyester, an adhesive layer, when the substrate layer mainly composed of olefin-based thermoplastic elastomer obtain a molded sheet having in this order, each layer Is a method of co-extrusion of a material for forming

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The urethane-based thermoplastic elastomer used in the surface layer of the molding sheet according to the present invention is not particularly limited, but polyurethane is used as a hard segment, and polyether, adipate-based polyester and caprolactone-based polyester are used as a soft segment. And a block copolymer having polycarbonate or the like. When higher oil resistance is required among these urethane-based thermoplastic elastomers, it is preferable to use adipate-based polyester, caprolactone-based polyester, or polycarbonate-type one.

There are two types of urethane-based thermoplastic elastomers having different heat resistance and light resistance depending on the isocyanate used (generally referred to as yellowing type and non-yellowing type). In the case where the molding sheet according to the present invention is applied to a portion exposed to light, such as a vehicle interior material, it is preferable to use a non-yellowing type urethane-based thermoplastic elastomer.

The urethane-based thermoplastic elastomer includes:
Generally, a molecule often has a rubber component (soft segment) having entropy elasticity and a molecular constraint component (hard segment) for preventing plastic deformation. , But does not have a three-dimensional network structure over a wide area.

The hardness of the surface layer varies depending on the desired feel and the hardness of the elastic fine particles to be described later, but it is generally 50 to 9 according to JIS K6301 A hardness.
8, more preferably 75 to 98. If the hardness is low, the surface layer generally has poor abrasion resistance, and if the hardness is high, the feel of the surface layer may be poor.

The surface layer may contain fine resin particles and / or an inorganic filler for matting the surface. Examples of the resin constituting the fine particles include, for example, polyurethane, acrylic-urethane copolymer, acrylic resin, polystyrene, styrene-isoprene copolymer and the like. Examples of the inorganic filler include silica. These resin fine particles and / or inorganic fillers may be used alone or as a mixture of two or more. Among these, resin fine particles having elasticity, for example, elastic fine particles such as elastic beads are particularly preferable. The average particle size of the elastic fine particles is preferably 1
２５25 μm. If the average particle size is less than 1 μm, the obtained sheet will not have a sufficient soft touch feeling or matte feeling, and if the average particle size exceeds 25 μm, the sheet surface will be rough depending on the thickness of the surface layer. The feeling may be inferior.

[0015] The thickness of the surface layer 5 ~100μm, good Mashiku is 20 to 100 [mu] m. However, if the surface layer is too thick, the abrasion resistance and the oil resistance are improved, but the cost of the molded article increases, which is not preferable.

As the resin constituting the intermediate layer, polyamide and polyester are preferable.

As the polyamide, nylon 4, nylon 6, nylon 11, nylon 12, nylon 66, nylon 6.10, nylon 6.12, nylon 6T, nylon MXD6, nylon 6.66, nylon 6.66
* 12 or a copolymer thereof. In addition, a polyamide elastomer having a polyamide as a hard segment and a polyester or a polyether as a soft segment may be used.

Examples of the polyester include polyethylene terephthalate and polybutylene terephthalate. Further, a polyester-based elastomer having polyester as a hard segment and polyester or polyether as a soft segment is also used. As these polyamide elastomers and polyester elastomers, those having no ether component are preferable. That is, the polyamide elastomer preferably has a hard segment of a polyamide type and the soft segment is of a polyester type, and the polyester elastomer preferably has both a hard segment and a soft segment of a polyester type.

As the resin constituting the intermediate layer, of these polyamides and polyesters, those suitable for the processing conditions when the molding sheet according to the present invention is subjected to processing such as stretching are appropriately selected.

When the molding sheet according to the present invention is subjected to vacuum molding, the vacuum molding temperature of the olefinic thermoplastic elastomer constituting the base layer of the molding sheet is from 100 to 100.
The intermediate layer preferably has a melting point of 8
It is made of a resin at 0 to 200C, more preferably 100 to 180C. When a resin having a melting point exceeding 200 ° C. is used, the shapeability during vacuum forming may be deteriorated. When a material having a melting point of less than 80 ° C. is used, peeling is likely to occur at the interface during vacuum forming or when using a forming sheet. As a material of the intermediate layer for vacuum forming, a copolymer of nylon 6 and nylon 12, a copolymer of nylon 6, nylon 66 and nylon 12, nylon 12, and the like are preferable.

[0021] The thickness of the intermediate layer is 5 ~100μm, good Mashiku is 10 to 100 [mu] m. When the thickness of the intermediate layer is less than 5 μm, the improvement of oil resistance by the intermediate layer becomes insufficient . On the other hand, if the thickness is too large, the effect is saturated, which is economically disadvantageous.

As the material constituting the adhesive layer, an adhesive polymer compatible with the resin constituting the base material layer is used. As such a polymer, for example, a polymer having a functional group such as a hydroxyl group, an amide group, an epoxy group, a carboxylic acid group, or a carboxylic ester group obtained by modifying an olefin-based material is preferable. For example, acid-modified SBS (styrene-butadiene-styrene copolymer), acid-modified SEBS (styrene-ethylene-styrene)
(Butylene-styrene copolymer), acid-modified polypropylene, acid-modified polyethylene, and the like. The acid modification is generally performed with maleic anhydride, fumaric acid, itaconic acid, tetrahydrophthalic anhydride or the like. The amount of the carboxylic acid is such that the acid value of the polymer is 1 to 3
An amount of 0 mgKOH / g is preferred.

The thickness of the adhesive layer is preferably at least 6 μm. When the thickness of the adhesive layer is less than 6 μm, the adhesion to the intermediate layer is insufficient at the initial stage and after the sheet stretching, and the abrasion resistance and the oil resistance of the surface layer and the intermediate layer are insufficiently improved. Sometimes. The upper limit can be set arbitrarily, but 50μ
m or less is sufficient.

When the adhesion between the surface layer and the intermediate layer is insufficient, it is preferable to provide an adhesive layer between the surface layer and the intermediate layer. This adhesive layer does not need to be the same as the adhesive layer used for bonding the base layer and the intermediate layer.

As the resin for the base layer, an olefin-based thermoplastic elastomer is used.

Examples of the polyolefin-based thermoplastic elastomer include those having polypropylene as a hard segment and ethylene as a soft segment, and those having a small amount of a diene component together with ethylene (in order of EPM).
That is, ethylene-propylene-methylene bond, EPD
M, ie, ethylene-propylene-diene-methylene bond, these are collectively called EPR, ie, ethylene-propylene rubber), those obtained by blending them, and those obtained by further adding an organic peroxide to these. Examples thereof include crosslinked products, those modified by grafting with unsaturated hydroxy monomers and derivatives of unsaturated carboxylic acids, and butyl rubber-grafted polyethylene. Further, those polymerized using a reactor type TPO or metallocene catalyst can also be used.

The substrate layer is not limited to one layer, but may be a laminate of a plurality of layers. The thickness of the substrate layer is preferably 50 to 100.
0 μm.

The molding sheet according to the present invention may be one in which a foam layer is further laminated on the surface of the substrate layer opposite to the surface on which the adhesive layer is laminated. The material of the foam layer is not particularly limited, but a foam of a polyolefin-based resin that is easily bonded to the olefin-based thermoplastic elastomer as the base layer is particularly preferable. By forming both the foam layer and the base material layer with a polyolefin-based polymer, a laminating method in which the foam layer is heat-sealed at the time of extruding the sheet becomes possible. Therefore, this material is particularly preferable. By laminating the foam layer on the base material layer in this manner, the sheet has cushioning properties. The material constituting the foam layer is preferably partially crosslinked from the viewpoint of improving foamability.

The expansion ratio of the foam is preferably about 5 to 50 times, more preferably 10 to 40 times. If the foaming ratio is too low, the cushioning property of the sheet is little imparted,
If the height is too high, the strength of the sheet decreases, and the foam layer is broken or the foam cells are easily crushed during stretch forming such as vacuum forming.

The molding sheet according to the present invention may further contain, if necessary, a coloring agent such as a pigment or a dye, an antioxidant, an ultraviolet absorber, or an ultraviolet stabilizer (for example, a hindered amine).
And other additives.

Further, in order to impart various functions to the molding sheet according to the present invention, various functionalizing agents can be added. Examples of the function imparting agent include a conductive material, an anti-condensation agent, a photochromic compound, a fungicide / antifungal agent, and an antistatic agent.

It is also preferable that the above-mentioned sheet is patterned by printing or the like in order to impart design properties. The pattern may be, for example, woodgrain, stone, two-tone, leather, and the like. The printing method may be, for example, gravure printing, a method using a coater, or the like. The surface of the sheet may be subjected to a graining process such as leather graining.

The method for producing a molding sheet according to the present invention comprises:
Although not particularly limited, for example, the following methods are available.

1) A molding sheet is obtained by co-extruding four kinds of compositions for constituting the surface layer, the intermediate layer, the adhesive layer and the base material layer, respectively. When the sheet has a foam layer, there are the following two methods.

Method 1: A method of laminating a foam layer on the base material layer in a molten state after co-extrusion of the above four compositions (extrusion lamination). At this time, a roll having an embossed surface may be used as a laminating roll, and embossing may be performed on the surface layer simultaneously with lamination.

Method 2: A method in which a sheet-like laminate is obtained by co-extrusion of the above four compositions, and this laminate is reheated and laminated with the heated foam layer. In this case, an adhesive such as a hot-melt adhesive may be applied in a layer to the foam layer and / or the base layer side of the sheet-like laminate in advance.

As a co-extrusion method, a method such as a feed block method, a multi-manifold method, a combination of a feed block and a multi-manifold, or a multi-throttle die method is appropriately employed.

2) Three types of compositions for constituting the surface layer, the intermediate layer and the adhesive layer are coextruded to obtain a sheet laminate. Thereafter, the base layer is extruded from the composition for forming the base layer, and the laminate is disposed on one side of the base layer such that the adhesive layer is on the base layer side, and laminated with the base layer. A method of crimping a body between a pair of rolls. When the sheet has a foam layer, these are arranged so that the base material layer is sandwiched between the adhesive layer and the foam layer of the laminate, and pressure-bonded between a pair of rolls (sandwich lamination).

3) Two types of compositions for forming the surface layer and the intermediate layer are coextruded to obtain a sheet-like laminate. Thereafter, two types of compositions for constituting the adhesive layer and the base material layer are co-extruded to obtain a sheet-like laminate. A method of arranging these two laminates such that the intermediate layer is on the side of the adhesive layer and pressing the laminate between a pair of rolls. When the sheet has a foam layer, the foam layer is arranged on the base material layer side, and the whole is pressed between a pair of rolls.

4) Three kinds of compositions for constituting the intermediate layer, the adhesive layer and the base material layer are co-extruded to obtain a sheet laminate. After that, the laminate is arranged on one side of a separately prepared surface layer such that the intermediate layer is on the surface layer side,
A method in which the surface layer and the laminate are pressure-bonded between a pair of rolls. When the sheet has a foam layer, the foam layer is arranged on the side of the base material layer and the whole is pressed between a pair of rolls.

Of these methods 1) to 4), the method 1) is the most preferable since a molding sheet can be manufactured simply and with good adhesion.

The molding sheet according to the present invention is molded, for example, as follows.

1) A sheet for molding is placed in a mold in advance so that a surface layer thereof becomes the surface of the molded article to be obtained, and a resin for forming a molded article main body is introduced into the mold. At the same time, the sheet is attached to the surface of the molded article body by molding the molded article body by injection molding or stamping molding. Here, in the case of stamping molding, the mold resin is introduced into the mold, and then the mold is closed. In the case of injection molding, the mold resin is closed, and then the molding resin is introduced. When the adhesion between the molded article body and the molding sheet is poor, an adhesive layer is provided on the foam layer side of the molding sheet.

2) The sheet for molding is preliminarily formed by thermoforming, and the preformed article is placed in a mold so that the surface layer is on the surface of the obtained molded article. A resin for molding is introduced into a mold to form a molded article body by injection molding or stamping molding, and at the same time, a sheet is affixed to the surface of the molded article body.

3) After the forming sheet is formed by thermoforming, a molded product is formed integrally with the sheet. What is thermoforming?
After heating, vacuum forming, pneumatic forming or press forming is performed. The molding sheet may be attached to a molded article made of resin or the like. In this case, an adhesive layer is generally provided on the foam layer side of the molding sheet and / or on the surface of the molded article. As vacuum forming, there are generally male pull forming and female pull forming, and any method can be applied.

The resin for forming the molded article main body may be any material that is usually used for obtaining molded articles. For example, ABS (acrylonitrile-butadiene-styrene copolymer), polyethylene, polypropylene, polyvinyl chloride, polystyrene, polycarbonate, acrylic resin, polyetherimide, polyphenylene sulfide, nylon, and the above-mentioned thermoplastic elastomer,
Furthermore, those obtained by adding glass fibers, inorganic fillers, organic fibers, and the like to these materials may be used.

Since the molding sheet according to the present invention can give good scratch resistance and good feel to the product surface, it can be suitably applied to articles or parts thereof which are easy for humans to touch.

That is, for example, interior parts of automobiles such as door panels, instrument panels, handles, gear lever knobs, door knobs, various switches, portable products (telephones, cassette tape recorders, compact discs, televisions, etc.), refrigerators, Housing for household appliances such as televisions, housing for office automation products such as switches, personal computers, printers, keyboards, etc., sanitary and bathroom products such as stools for western style toilets, bathtubs, chairs, mats, shelves, etc. , Rackets, sports equipment such as grips for clubs, etc., daily necessities such as cases and containers, housing for armor products, etc.
It can be used for benches, chairs, tables, sofas and the like.

[0049]

Since the molding sheet according to the present invention is constituted as described above, it can give a good contact feeling and matte feeling to the article, and is excellent in both scratch resistance and oil resistance. .

[0050]

EXAMPLES The present invention will be described below in detail by comparing Examples and Comparative Examples. In the following, "part"
Means part by weight in solid content.

Example 1 a) Surface layer material Thermoplastic urethane elastomer resin (Morton, P
N3429, polyester-based non-yellowing urethane JIS-A
100 parts of elastic beads (hardness 85) and 90 parts of elastic beads (manufactured by Dai Nippon Ink Co., Ltd., Burnock CFB101-40 (clear), elastic beads of urethane, average particle size 8 μm) are extruded by a twin-screw kneading extruder, and the extrudate is cooled. After that, it was cut to a predetermined length by a cutter for softness to obtain pellets.

The set temperature of each part in the extruder was as follows. Screw back: 140 ° C, middle: 1
60 ° C, front: 170 ° C, die: 170 ° C.

B) Intermediate layer material Nylon 12 (manufactured by Daicel Huls, Daiamide L1)
940 W, mp 178 ° C).

C) Adhesive layer material Acid-modified polyolefin (manufactured by Mitsui Petrochemical Co., Ltd., Admer Q)
F500).

D) Substrate layer material: 40 parts of thermoplastic olefin elastomer (1) (Millastomer 8030, manufactured by Mitsui Petrochemical) and 40 parts of thermoplastic olefin elastomer (2) (Milastomer 5030, manufactured by Mitsui Petrochemical) , 10 parts of linear low-density polyethylene (Ultzex 2021L, manufactured by Mitsui Petrochemical) and polypropylene (F650, manufactured by Mitsui Petrochemical)
0 parts and pellet blend.

The four types of materials a), b), c) and d) were each extruded from an extruder (not shown), as shown in FIG. Extruder 1 (Plastic Engineering Laboratory Co., Ltd.) diameter 40
mm resin introduction tube 2a, 40 mm diameter resin introduction tube 2b, 40 mm diameter resin introduction tube 2c, 50 mm diameter resin introduction tube
2d and co-extruded. The obtained four-layer laminate sheet 4
Was taken out from the T-die 3 downward. The temperature of each resin material introduced into the four-layer coextrusion apparatus 1 was 180 ° C. for material a), 210 ° C. for material b), 200 ° C. for material c), and 22 for material d).
The temperature of the T-die was 190 ° C.

While the laminate sheet 4 coming out of the T-die 3 is air-cooled, it is taken off by a cooling take-off roll 5 with a surface embossment at a position about 15 cm below the mold lip, and a separately prepared foamed polypropylene sheet 6 (expansion ratio) 25 times, thickness 2m
m) is introduced between the cooling take-off roll 5 and the laminating roll 7 to sandwich the foam sheet 6 and the laminate sheet 4, and the foam sheet 6 is pressed against the base material layer of the laminate sheet 4. A layered sheet 8 with a layer was obtained.

The thickness of each layer of the obtained laminate sheet 7 is as follows: surface layer: 20 μm, intermediate layer: 7 μm, adhesive layer: 1
0 μm, base material layer: 355 μm. This sheet is referred to as a forming sheet (1).

Example 2 The material of the intermediate layer was nylon 6-12 (712, manufactured by Ube Industries, Ltd.).
8, melting point 136 ° C.), and a molding sheet (2) was obtained in the same manner as in the production of the molding sheet (1) except that the thickness of the intermediate layer was 15 μm and the extrusion temperature was appropriately changed.

Example 3 A molding sheet (3) was obtained in the same manner as in the production of the molding sheet (2) except that the foamed polypropylene sheet was not laminated on the laminate sheet.

Example 4 A molding sheet (4) was obtained in the same manner as in the production of the molding sheet (2) except that the thickness of the intermediate layer was changed to 7 μm.

Example 5 A sheet for molding (2) except that the thickness of the intermediate layer was 25 μm.
A molding sheet (5) was obtained in the same manner as in the production of (1).

Example 6 A molding sheet (2) except that the thickness of the surface layer was 15 μm
A sheet for molding (6) was obtained in the same manner as in the production of.

Example 7 A molding sheet (7) was obtained in the same manner as in the production of the molding sheet (2) except that the thickness of the surface layer was changed to 8 μm.

Example 8 Molding was performed except that the thermoplastic urethane elastomer resin of the surface layer material was changed to a thermoplastic urethane elastomer resin (E990P, polycarbonate-based non-yellowing urethane, JIS-A hardness 90) manufactured by Nippon Milactone Co., Ltd. Sheet
A molding sheet (8) was obtained in the same manner as in the production of (2).

Example 9 A molding sheet (2) except that the material of the intermediate layer was changed to a polyester-based thermoplastic elastomer (manufactured by Toyobo Co., Ltd., S1001-04, having an aliphatic polyester as a soft segment, melting point: 200 ° C.) A molding sheet (9) was obtained in the same manner as in the production of (1).

Example 10 A molding was performed in the same manner as in the production of the molding sheet (2), except that the material of the intermediate layer was changed to a copolymer of nylon 6 and nylon 12 (Ube Industries, Ltd., 7028, melting point: 160 ° C.). Sheet
(10) was obtained.

Example 11 The materials of the intermediate layer were nylon 6, nylon 66 and nylon 1.
Copolymer of No. 2 (6031G, melting point 110, manufactured by Ube Industries, Ltd.)
° C) to obtain a molding sheet (11) in the same manner as in the production of the molding sheet (2).

Example 12 The materials for the intermediate layer were nylon 6, nylon 66 and nylon 1.
Copolymer of No. 2 (Ube Industries, Ltd., 6025G, melting point 85)
C)) to obtain a molding sheet (12) in the same manner as in the production of the molding sheet (2).

Example 13 A molding sheet (except that the thickness of the intermediate layer was 25 μm) was changed to a polyamide elastomer (Daiamide PAE E62, a melting point of 173 ° C. having a polyether as a soft segment) as the material of the intermediate layer. A molding sheet (13) was obtained in the same manner as in 2).

Comparative Example 1 A molding sheet (14) was obtained in the same manner as in the production of the molding sheet (2) except that the thickness of the surface layer was changed to 3 μm.

Comparative Example 2 A molding sheet (15) was obtained in the same manner as in the production of the molding sheet (2) except that the thickness of the intermediate layer was changed to 3 μm.

Example 15 A material for molding was formed in the same manner as in the production of the molding sheet (13) except that the thickness of the intermediate layer was changed to nylon 6 (Novamid 1020, manufactured by Mitsubishi Chemical Corporation, melting point: 225 ° C.) and the thickness was 7 μm. Sheet (16) was obtained.

Comparative Example 3 A molding sheet (1) was produced in the same manner as in the production of the molding sheet (2) except that the surface layer was not formed and the thickness of the intermediate layer was changed to 25 μm.
7) was obtained.

Comparative Example 4 A molding sheet (18) was obtained in the same manner as in the production of the molding sheet (2) except that the surface layer and the intermediate layer were not formed.

Comparative Example 5 A molding sheet (19) was obtained in the same manner as in the production of the molding sheet (7) except that the intermediate layer was not formed.

Evaluation Test Evaluation tests were performed on the molding sheets obtained in Examples and Comparative Examples for the following items a) to e).
The results are shown in Tables 1 to 4.

A) Thickness of each layer: A cross section of each layer was observed with an optical microscope and measured. b) Scratch resistance: Using a Gakushin type friction tester of JIS L 0823, using cotton No. 3 of JIS L 0803, this was reciprocated 100 times at a load of 500 g at 30 times / min to perform an abrasion resistance test. Was. The appearance of the sheet after reciprocation was observed, and the scratch resistance was evaluated based on the following criteria.

Evaluation criteria for scratching property: 5: no change in appearance is observed 4: slight change in appearance is observed but not conspicuous 3: slight change in appearance but clearly observed 2: slight change in appearance Remarkable 1: Appearance change is remarkable

C) Oil resistance: A cotton soaked with JIS K 6258 No. 3 oil was placed on a sheet and left in an oven at 110 ° C. for 72 hours, after which the abrasion resistance test was performed. Evaluation criteria are the same as above.

D) Vacuum forming and shapeability: The surface layer of the sheet is heated to 120 ° C. and the foam layer is heated to 140 ° C. by a far infrared heater, and as shown in FIG. Vacuum forming was performed using a vacuum forming die 11 having a plurality of vacuum holes 10 at the bottom of the recess 9. The radius of curvature at the corners of the sheet after forming was determined, and the formability of vacuum forming was evaluated based on the following criteria.

Evaluation criterion for shapeability: 5: The radius of curvature of the corner of the sheet is within + 10% of the radius of curvature of the corner of the mold.

4: The radius of curvature of the corner of the sheet is within + 20% of the radius of curvature of the corner of the mold.

3: The radius of curvature of the corner of the sheet is within + 30% of the radius of curvature of the corner of the mold.

2: The radius of curvature of the corner of the sheet is within + 50% of the radius of curvature of the corner of the mold.

1: No shaping is possible

E) Heat grain retention: The surface layer of the sheet was heated to 120 ° C. and the foam layer was heated to 140 ° C. by a far-infrared heater, and the residual rate of the grain after heating was determined by the following equation.

Residual ratio = texture depth after molding / initial texture depth ×
100

The retention of heated grain was evaluated according to the following criteria based on the residual rate of the grain after heating.

Evaluation criteria for heating grain retention: 5: Residual rate of 40% or more 3: Residual rate of 30% or more 1: Residual rate of less than 30%

The molding sheets obtained in the examples exhibited better results in all the items than those of the comparative examples.

[0092]

[Table 1]

[Table 2]

[Table 3]

[Table 4]

[0093]

The molding sheet according to the present invention, by coating the article with this, can give the article a good contact feeling and a matte feeling, and is excellent in both scratch resistance and oil resistance. It is. Therefore, this molding sheet can be suitably applied to an article or a part touched by a person or an article or a part touched by oil.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an example of a co-extrusion apparatus for performing a method of manufacturing a forming sheet according to the present invention.

FIG. 2 is a schematic vertical sectional view showing an example of a vacuum forming mold used for forming a forming sheet.

[Explanation of symbols]

 1: 4-layer co-extrusion apparatus 2a, 2b, 2c, 2d: Resin introduction tube 3: T die 4: Laminated sheet 5: Cooling take-off roll 6: Foamed polypropylene sheet 7: Laminating roll 8: Laminated sheet with foam layer 9: Circular recess 10: Vacuum hole 11: Vacuum forming mold

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-214650 (JP, A) JP-A-8-118575 (JP, A) JP-A 58-131993 (JP, U) (58) Survey Field (Int.Cl. ⁷ , DB name) B32B 1/00-35/00

Claims (3)

(57) [Claims] 1. A urethane-based thermoplastic elastomer.
Front surface layer of Ruatsumi 5 to 100 [mu] m, between layers in the Ruatsumi 5 to 100 [mu] m, such a polyamide or polyester, the adhesive layer, the substrate layer mainly composed of olefin-based thermoplastic elastomer are laminated in this order A molding sheet characterized by the following. 2. The molding sheet according to claim 1, wherein a foam layer is laminated on the surface of the base material layer opposite to the adhesive layer. 3. A urethane-based thermoplastic elastomer.
Obtain front surface layer of Ruatsumi 5 to 100 [mu] m, between layers in the Ruatsumi 5 to 100 [mu] m, such a polyamide or polyester, an adhesive layer, a molding sheet having a substrate layer in this order mainly composed of olefin-based thermoplastic elastomer On
A method for producing a forming sheet, comprising co-extruding a material for forming each layer.