JPH07290625A - Method for manufacturing covering sheet - Google Patents

Abstract

(57) [Abstract] [Purpose] A method for producing a covering sheet which has excellent flexibility and scuff resistance, has a good appearance, and can be attached along the surface of a molded product having irregularities and curved surfaces. provide. [Structure] From a base material layer B22 side of a laminated sheet 2 extruded from a T die 8, a foamed sheet 1 in which a base material layer A resin made of a thermoplastic urethane elastomer resin and a polyethylene foam are laminated is supplied and extruded. The base material layer B22 of the foamed sheet 1 is added to the base material layer B22 of the laminated sheet 2 in the melted state.
11 were overlapped and passed through a pair of pressure-bonding rolls 6 to be fused and integrated to obtain a covering sheet 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to automobile interiors, office automation equipment, housings for home appliances, etc.
The present invention relates to a method for producing a covering sheet that is used for covering molded articles such as stationery, sanitary products, daily necessities, and interior building materials and that has a scratch-resistant surface and is excellent in scratch resistance.

[0002]

2. Description of the Related Art Heretofore, as such a coating material, a sheet has been used which is composed of a vinyl chloride resin layer having an embossed surface, and a foam layer is laminated if necessary. However, the sheet using vinyl chloride resin,
The sheet lacks flexibility and requires multiple steps in manufacturing. It is known that a polyolefin-based thermoplastic elastomer layer is extruded into a sheet shape and fused to a crosslinked foam sheet at the same time without using a vinyl chloride resin (see, for example, Japanese Patent Publication No. 1-14032).

[0003]

A sheet using a vinyl chloride resin or a sheet using a thermoplastic polyolefin-based elastomer as described in the above publication has scratch resistance due to the rubber elasticity of the sheet and the contact resistance of the surface. It had the drawback of being bad.

In order to impart abrasion resistance, there is a method of coating an acrylic ester resin after providing a primer layer (for example, JP-A-63-27254).
However, since organic solvents are used, there is a problem in terms of safety and hygiene.

For the production of the covering sheet composed of such a laminated sheet, a coextrusion molding method is usually adopted. By the way, the material and thickness of each layer constituting the covering sheet is of quality,
In terms of cost, it is required to select a material and set a thickness suitable for the characteristics of each layer. Therefore, in terms of cost, there is a tendency that the costly surface layer and the adhesive resin layer become thin, and the inexpensive base material layer becomes thick.

However, if only the cost-effective aspect is pursued and the base material layer is thickened, the melt viscosity and flow rate difference of the resin of each layer are adversely affected in the molding step, and the thickness accuracy of each layer cannot be obtained, or the resin layer The interface may be roughened and the appearance may be impaired. In addition, in order to make the base material layer thicker, a two-layer sheet having a surface layer and an adhesive layer is prepared in advance, and then the base material layer is extruded, and one side of the base material layer in a molten state is a two-layer sheet. A laminated sheet composed of a surface layer, an adhesive layer, a base material layer, and a foam, which is passed through a pair of rolls in a state of being laminated so that the other surface is in contact with the adhesive layer and the foam is in contact with the other surface, and is fused and integrated. There is a way to get. However, in this case, it is difficult to make a thin two-layer sheet, and even if it can be made thin, it is difficult to handle the sheet when it is laminated with the base material layer, and the two-layer sheet can be wrinkled before being laminated. There is.

The present invention solves the above-mentioned problems of the prior art, is excellent in flexibility and scratch resistance, has a good appearance, and can be applied along the surface of a molded product having irregularities and curved surfaces. An object of the present invention is to provide a method for manufacturing a sheet for use.

[0008]

A method for producing a coating sheet according to the present invention comprises a surface layer containing a thermoplastic urethane elastomer as a main component, a base layer comprising an adhesive layer and a thermoplastic elastomer, and a foam layer. Is a method for producing a laminate formed by laminating in this order, in which a laminated sheet in which an adhesive layer, a surface layer, and a base material layer are arranged in this order is coextrusion-molded, and at least the base material layer is in a molten state. In the base material layer of the laminated sheet,
The base material layer and the base material layer of the foamed sheet made of a foam are overlapped, and the base material layer of the laminated sheet is passed between at least two rolls until the base material layer is in a molten state, thereby bonding the laminated sheet and the foamed sheet. It is characterized by matching.

The thermoplastic urethane elastomer used for the surface layer has rubber elasticity at room temperature, is plasticized at high temperature and can be molded in various ways, and generally has a rubber component having entropy elasticity in the molecule ( The soft segment) has a polyether polyester, a polycarbonate, and a segment constituted by a urethane bond as a molecular constraint component (hard segment) for preventing plastic deformation. It may have a partially cross-linked structure in the molecule in the moldable range, but it does not have a wide range of three-dimensional stitch structures.

The above-mentioned thermoplastic urethane elastomer preferably has rubber elasticity at room temperature in order to exhibit abrasion resistance, and particularly preferably has a glass transition point in the range of -50 to 20 ° C. When the glass transition point is -50 ° C or lower, the strength is insufficient and the scratch resistance is lowered, and when the glass transition point is higher than 20 ° C, the glass is hard and the flexibility is lowered.

If the average molecular weight of the thermoplastic urethane elastomer is too low, the rigidity of the sheet decreases, and conversely if it is too high, the flexibility of the sheet is impaired. Therefore, the weight average molecular weight is in the range of 20000 to 3000000. Is preferred.

The hardness of the surface layer differs depending on the hardness and thickness of the base material layer and the foam layer laminated on the back surface, but JIS
It is preferable that the A hardness is in the range of about 50 to 98.

When durability such as weather resistance and heat resistance is required, a non-yellowing type thermoplastic urethane elastomer using an aliphatic isocyanate is preferable.

Further, the surface layer may contain elastic fine particles. By containing the elastic fine particles, fine irregularities are formed on the surface, and a matte state is obtained, resulting in a very soft touch and soft touch. The elastic fine particles are those having a property of recovering the shape by elasticity after pressurizing until the shape is deformed, and then releasing the pressure, for example, polyurethane, acrylic resin (preferably acrylic-urethane resin), polystyrene, The styrene-isoprene copolymer may be used, but those which do not undergo plasticization or decomposition depending on extrusion conditions are preferable.

The shape of the elastic fine particles is not limited to a spherical shape, and non-spherical particles obtained by means such as freeze pulverization can be used, and the maximum particle size distribution is preferably in the range of 1 to 100 μm. If the particle size is less than 1 μm, the unevenness of the surface is too small, and thus the suede feeling (soft touch feeling) cannot be sufficiently obtained on the obtained sheet, and if the particle size exceeds 100 μm, the surface of the sheet when stretched The cracks are likely to occur.

If the amount of the elastic fine particles added is less than 20 parts by weight, the unevenness of the surface of the sheet is poor and a sufficient suede feeling cannot be obtained. If it exceeds 150 parts by weight, the surface of the sheet is cracked when stretched. Is likely to occur. Therefore, the addition amount is preferably 20 to 150 parts by weight with respect to 100 parts by weight of the resin.

The elastic fine particles are not limited to one kind, and two or more kinds may be used in combination. When a flexible thermoplastic urethane elastomer is used or the surface of the sheet-shaped laminate has a slightly hard feel, for example, hard beads made of an inorganic material such as crosslinked polymethylmethacrylate or silica gel are mixed with the elastic fine particles. You may.

The material constituting the adhesive layer is a surface layer,
An adhesive polymer having compatibility with the resin forming the base layer is used. For example, when a polyolefin-based thermoplastic elastomer is used for the base material layer, a polymer containing a compound having a functional group such as a hydroxyl group, an amide group, an epoxy group, a carboxylic acid group, or a carboxylic acid ester group in the main chain or side chain. Is used. For example, acid-modified styrene-butadiene-styrene copolymer (SBS), acid-modified styrene-ethylene-butylene-styrene copolymer (S
EBS), acid-modified polyethylene, acid-modified polypropylene, and the like.

As the thermoplastic elastomer constituting the base material layer, any of a polyolefin type, a polyester type, a polyamide type and the like may be used, but a polyolefin type thermoplastic elastomer which is excellent in moldability and cost is preferable. The polyolefin-based thermoplastic elastomer has polypropylene as a hard segment and has ethylene-propylene-methylene bond having ethylene as a soft segment and ethylene-propylene-diene methylene bond having a small amount of diene component together with ethylene. , And mixtures thereof,
Some of these are partially crosslinked by adding an organic peroxide.

The hardness of the thermoplastic elastomer varies depending on the feel to be obtained, but generally the JIS A hardness is 5
Those in the range of 0 to 98 are preferable.

In order to improve the extrusion moldability and vacuum moldability of the base material layer, a polyolefin resin (polypropylene, linear low density polyethylene, etc.) may be mixed in the base material layer.

The manufacturing method of the laminated sheet in which the surface layer, the adhesive layer and the base material layer are arranged in this order is not particularly limited, but a coextrusion molding method which does not require a plurality of steps and has excellent adhesion of each layer is preferable. . Co-extrusion molding uses two or more extruders,
In this method, the resins extruded from the mold are joined together in a layered state to form a sheet-shaped laminate. Multi-manifold method, multi-throttle method,
The feed block method and the like can be mentioned.

If the thickness ratio of the base material layer of the above-mentioned laminated sheet is too large as compared with the other layers, when it is extrusion-molded using a feed block, the surface layer has unevenness such as wood grain and the appearance is deteriorated. Therefore, the thickness ratio of the base material layer is preferably 10 times or less the total thickness of the surface layer and the adhesive layer.

The laminated sheet may be patterned by printing or the like in order to improve the design. In such a case, the surface layer is made transparent and is applied to the surface which becomes the base material layer side. Is preferred.

When the base material layer of the above-mentioned laminated sheet is extruded from the mold and is in a molten state, the base material layer and the base material layer of the foamed sheet made of foamed material are bonded together to be integrated. The base material layer of the foamed sheet is selected and used from those used for the base material layer of the laminated sheet.

The material of the foam is polypropylene,
Polyolefin resin such as polyethylene, polystyrene, polystyrene resin such as styrene-maleic anhydride copolymer, polyurethane, polyurethane resin such as polyether urethane, vinyl chloride resin such as vinyl chloride resin, thermoplastic elastomer, and the like, and Examples thereof include a mixture thereof, but it is preferable to contain the same kind of resin as the base material layer, particularly a polyolefin-based resin, so that the adhesiveness to the base material layer is improved without using an adhesive.

The foamed resin is preferably at least partially crosslinked because the foamed resin has fine and uniform cells after foaming, which has good cushioning properties and high strength.

If the foaming ratio of the foam is low, sufficient cushioning properties cannot be imparted, and if it is too high, the strength becomes low. Therefore, the expansion ratio is preferably about 5 to 50 times, more preferably 10 to 30 times. It is about double.

If necessary, the above-mentioned foam may contain a coloring agent such as a pigment or a dye, an antioxidant, and the like, as long as the physical properties are not impaired.
You may add light stabilizers, such as a ultraviolet absorber and a hindered amine.

As the colorant, pigments and dyes used as paints can be used. Titanium oxide as a pigment,
Examples include iron oxide, carbon black, cyanine-based, quinacridone-based, and dyes such as azo-based dyes, anthraquinone-based dyes, indigoid-based dyes, and stilbene dyes. Alternatively, metal powder such as aluminum flakes, nickel powder, gold powder, and silver powder may be used as the colorant. The amount of the colorant added varies depending on the use, but when a colorant having a high hiding property is used, it is generally preferable that the amount is 2 to 400 parts by weight based on 100 parts by weight of the solid content of the resin.

The means for laminating the base material layer and the foam to form the foamed sheet is not particularly limited. For example, a method of adhesively laminating using an adhesive, or a method of laminating the surface of at least one of the base material layer and the foam A heat laminating method of laminating in a heated and melted state, or a resin to be a base material layer and an unfoamed foamable resin are produced by coextrusion as a laminate, which is then heated to a foaming temperature to form a foamable resin. And the like.

The thickness of the covering sheet is 5-100 for the surface layer.
μm, adhesive layer 5 to 100 μm, base material layer 200 to 30
It is preferable that the thickness is 00 μm and the foam is 1000 to 5000 μm.

An example of the method for producing the covering sheet of the present invention will be described. Extruding a resin to be a base material layer of a foamed sheet by an extruder, stacking a sheet-shaped foam on one surface when the resin extruded is in a molten state, and passing it between a pair of pressure rolls A foamed sheet in which a foam is laminated and integrated on a material layer is obtained. When the adhesion between the base material layer of the foamed sheet and the foam is poor, a primer layer or an adhesive layer may be provided in advance on the surface of the foamed material on the base material layer side.

Next, the resin to be the surface layer, the adhesive layer and the base material layer constituting the laminated sheet is melted respectively by three extruders equipped with a feed block and a mold, and simultaneously extruded and laminated in a molten state. To obtain a laminated sheet. When at least the base material layer of the laminated sheet is in a molten state, the base material layer of the foamed sheet is superposed on the base material layer of the laminated sheet in the melted state, and is passed between a pair of pressure-bonding rolls. The base materials of the sheet are fused together.

In this way, the surface layer, the adhesive layer, the base material layer,
A covering sheet having the foams arranged in this order is obtained.
Therefore, the base material layer of the obtained covering sheet is composed of the base material layer of the laminated sheet and the base material layer of the foamed sheet.
The step of producing the foamed sheet and the step of producing the laminated sheet may be performed separately as described above, or may be performed in continuous steps.

Since the thermoplastic urethane elastomer used for the surface layer has a hygroscopic property, it is preferable to dry it sufficiently in the extruder before extrusion and to extrude the air containing steam in the barrel of the extruder for this purpose. Is preferably extruded while being sufficiently discharged from the vent.

Further, the coextrusion-molded laminated sheet is laminated with the foamed sheet, passed through a pressure bonding roll and cooled. If the surface of this pressure-bonding roll or the next roll is roughened for embossing, a covering sheet having a surface layer embossed can also be obtained.

The covering sheet obtained by the present invention is used for interiors of automobiles (for example, door skins, dashboard skins, etc.), office automation equipment, housings for home electric appliances, stationery, sanitary products, daily necessities, interior building materials. Used as a surface material for molded products such as. As a method of use, a foam sheet side of the covering sheet is adhered to the material before molding of the molded article, a method of molding by vacuum molding, pressure molding, thermoforming, etc., a laminated sheet on the inner surface of the mold during injection molding. After preforming, closing the mold and injecting resin,
Further, there is a stamping molding method in which a resin is introduced into a mold after the laminated sheet is preformed and then the mold is closed.

[0039]

In the molten state, the base layer of the laminated sheet is co-extruded together with the surface layer and the adhesive layer on the assumption that the thickness ratio of the base layer to the total thickness of the surface layer and the adhesive layer is not large, and the base layer of the foamed sheet Since the layers are stuck together to be laminated and integrated, a resin having an excellent appearance can be obtained without roughening the interface of the resin layer. Furthermore, since the base material layer can be made thick and the thickness ratio of the base material layer to the other layers can be made large, a product advantageous in terms of cost can be obtained. Further, since the surface layer is mainly composed of thermoplastic urethane elastomer, abrasion resistance and flexibility can be obtained.

[0040]

The method for producing a covering sheet of the present invention will be described below with reference to the drawings. Surface layer Surface layer 1 Thermoplastic urethane elastomer resin (Asahi Glass Co., Ltd., trade name: PN3429-215, JIS A hardness 85) Surface layer 2 Thermoplastic urethane elastomer resin (Asahi Glass Co., Ltd., brand name: PN3429-215, JIS A hardness) 85) 10
0 parts by weight Elastic fine particles (urethane beads manufactured by Dainippon Ink and Chemicals, Inc., trade name: Burnock CFB101-40 clear,
Average particle size 8 μm) 50 parts by weight The above mixture Surface layer 3 thermoplastic urethane elastomer resin (manufactured by Dainippon Ink and Chemicals, Inc., trade name: T7890, JIS A hardness 91)
100 parts by weight Elastic fine particles (urethane beads manufactured by Sekisui Plastics Co., Ltd., trade name: UB20-black, average particle size 20 μm) 80 parts by weight The above mixture

Adhesive Layer Adhesive Layer 1 Maleic Acid Modified Polypropylene (Mitsui Petrochemical Industry Co., Ltd., Trade Name: Admer QF551) Laminate Layer 2 Maleic Acid Modified SEBS (Asahi Kasei Industry Co., Ltd., Trade Name: Tuftec M1943)

Substrate Layers A and B Substrate Layer 1 Thermoplastic olefin elastomer resin (Mitsui Petrochemical Industry Co., Ltd., trade name: Mirastomer 8030N) 50 parts by weight Thermoplastic olefin elastomer resin (Mitsui Petrochemical Co. Ltd., trade name) : Mirastomer 5030N) 30 parts by weight Linear low density polyethylene (Mitsui Petrochemical Industry Co., Ltd., trade name: UZ2021L) 10 parts by weight Polypropylene (Mitsui Petrochemical Industry Co., Ltd., trade name: F6
50) 10 parts by weight of the above mixture Base material layer 2 Thermoplastic olefin elastomer resin (Mitsui Petrochemical Industry Co., Ltd., trade name: Mirastomer 8030N) 50 parts by weight Linear low density polyethylene (Mitsui Petrochemical Co., Ltd. trade name: UZ2021L) 10 parts by weight polypropylene (manufactured by Mitsui Petrochemical Co., Ltd., trade name: F6
50) 10 parts by weight The above mixture Foam Foam 1 Foamed polypropylene sheet (manufactured by Sekisui Chemical Co., Ltd., trade name: Softlon, thickness 2 mm, expansion ratio 25 times)

(Examples 1 to 4) Production of Foamed Sheet An extruder (diameter 50 mm, not shown) is used to produce the foamed sheet.
And the feed block 7 and the T die 8 as shown in FIG.
(Width 500 mm), the resin temperature is 230 ° C. when it is introduced into the mold, the mold temperature is also 230 ° C., the pressure roll 6,
The temperature of 6 was controlled at 50 ° C. In FIG. 1, 9 is a resin flow path from the extruder to the feed block 7.

While extruding the resin of the base material layer A shown in Table 1 from the extruder, the foamed body 12 is fed out, and immediately before entering the pressure bonding rolls 6 and 6, it is superposed on the melted base material layer A11 to form the pressure bonding rolls 6 and 6. Was passed through and fused to form a foamed sheet 1 and wound.

Production of coating sheet As shown in FIG. 2, the apparatus used was three extruders (not shown), feed block 7, T die 8 (width 500 m).
m) and a three-layer co-extrusion device for extruding the surface layer 21, the adhesive layer 23, and the base material layer B22, respectively, having caliber diameters of 40 mm, 40 mm, and 50 mm. Surface layer 21,
The resin to be the adhesive layer 23 and the base material layer B22 was melted by each extruder and supplied from the feed block 7 to the T die 8 to form the laminated sheet 2 by coextrusion molding. The resin temperature was 205 ° C. at the surface layer when the resin was introduced into the mold and the adhesive layer 1
90 ° C, base material layer 230 ° C, T-die mold temperature is also 230 ° C
I went there. The temperature of the pressure bonding roll was controlled at 50 ° C. As the pressure bonding rolls 6 used in Example 3, those having leather-like grain on the surface were used. Reference numerals 91 and 92 denote resin flow paths from the extruder to the feed block 7.

The foam sheet 1 is supplied from the side of the base material layer B22 of the laminated sheet 2 extruded from the T-die 8, and the base material layer B22 of the laminated sheet 2 in the extruded and melted state is added to the base material of the foam sheet 1. The material layers A11 were overlapped with each other, passed through a pair of pressure-bonding rolls 6, and fused and integrated to obtain a covering sheet 3.

Comparative Example 1 The base material layer A resin shown in Table 1 was extruded using the apparatus shown in FIG. 1, and the foamed material 12 used in the embodiment was laminated on the base material layer A11 in a molten state. In this state, it was passed between the pair of pressure-bonding rolls 6, and was fused and integrated to form the covering sheet 4. The resin temperature was controlled to be 230 ° C. when introduced into the T die, the mold temperature was also 230 ° C., and the pressure bonding roll was controlled to be 50 ° C.

(Comparative Example 2) Using the apparatus shown in FIG. 2, resin for the surface layer, the adhesive layer, and the base material layer B was arranged in this order.
Layer co-extrusion molding, and in a state of being laminated so that the foamed body of the same foamed sheet as used in the example is in contact with the base material layer B in a molten state, it is passed between a pair of pressure-bonding rolls 6, 6 and fused. They were integrated to obtain a covering sheet (not shown). The respective resin temperatures and mold temperatures are the same as in the example.

(Comparative Example 3) As shown in FIG. 3, two extruders (not shown), a feed block 7 and a T die 8 were used.
(A width of 500 mm) was used.
As an extruder for extruding the surface layer 41 and the adhesive layer 42, an apparatus having a diameter of 40 mm was used. The resins to be the surface layer 41 and the adhesive layer 42 shown in Table 1 were melted by respective extruders and supplied to the T die 8, and the laminated sheet 4 was molded by coextrusion molding. The resin temperature was 205 ° C. for the surface layer and 190 ° C. for the adhesive layer when it was introduced into the mold, and the temperature of the T-die was 230 ° C. The temperature of the pressure bonding roll was controlled to be 50 ° C.

Next, as shown in FIG. 4, the resin to be the base material layer 50 is melted by an extruder (diameter 50 mm, not shown), and T
The adhesive layer 41 of the laminated sheet 4 is extruded from the die 8 (width: 500 mm) and is applied to one surface of the base material layer 50 in a molten state.
On the other surface of the base material layer 50 so that they are in contact with each other.
1 was supplied and passed through a pair of pressure-bonding rolls 6 to be laminated and integrated to obtain a covering sheet 5 including a surface layer 41, an adhesive layer 42, and a foam 51. The resin temperature was 230 ° C. when it was introduced into the mold, and the temperature of the T die was also 230 ° C.
The temperature of the pressure bonding roll was controlled to be 50 ° C.

Evaluation The scratch resistance and appearance of the coating sheets obtained in Examples 1 to 4 and Comparative Examples 1 to 3 were evaluated by the following methods, and the results are shown in Table 1.
It was shown to. (1) Scratch resistance Measure the load when scratched with the product name "Taber Scratch Tester" manufactured by Toyo Seiki Seisakusho. (2) Appearance A. Judgment by visual observation B. Measurement of Surface Roughness by Surface Roughness Meter Based on JIS B0601, using Tokyo Seimitsu Co., Ltd. product name "Surfcom", the maximum height of the section curve (Rma
x) and 10-point average roughness (Rz) were measured, and each was 3
The average value after repeated measurements was shown. The measurement length is 30 mm.

[0052]

[Table 1]

As is clear from Table 1, in Examples 1 to 4, even if the thickness ratio of the base material layer was made higher than the other layers, the interface between the base material layer and the layer in contact therewith was rough. Since it was not present, an excellent appearance was obtained, and the surface layer was not easily scratched. Also, a molded product having a curved surface, which was adhered to a molding material for an automobile door interior material, was obtained which was well fit to the curved surface and had no wrinkles.

On the other hand, Comparative Example 1 has a good appearance, but is very susceptible to scratches because it has no surface layer, and Comparative Example 2 has a foamed body directly fused to the base layer of the laminated sheet. In Comparative Example 3, the appearance was poor, and the laminated sheet without the base material layer B was fused to the base material layer in the molten state, so that wrinkles were generated in the thin surface layer and the appearance was poor. Could not be used as

[0055]

The method for producing a covering sheet of the present invention has the above-mentioned constitution, and the thickness ratio of the base material layer can be made larger than the other layers to be laminated, and the interface of the resin layer is rough. A product having an excellent appearance can be obtained without increasing the thickness of the base material layer, so that a product advantageous in terms of cost can be obtained. The coating sheet obtained by the present invention,
Since the surface layer is mainly composed of thermoplastic urethane elastomer, it has excellent scratch resistance and is not easily scratched, and also has excellent flexibility, so even molded products with irregularities or curved surfaces can easily follow the surface. It can be pasted together.

[0056]

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a method for manufacturing a laminated sheet used in the present invention.

FIG. 2 is a side view showing an embodiment of a method for manufacturing a covering sheet according to the present invention.

FIG. 3 is a side view showing a method for manufacturing a laminated sheet in Comparative Example 3.

FIG. 4 is a side view showing a method for manufacturing a covering sheet according to a comparative example 3.

[Explanation of symbols]

 1: Foamed sheet 2: Laminated sheet 3, 4, 5: Covering sheet 6: Crimping roll 7: Feed block 8: T die 11, 51: Base material layer A 12, 51: Foam 21, 41: Surface layer 22 : Base material layer B 23, 42: Adhesive layer 50: Base material layer

Claims (1)

[Claims] 1. A method for producing a laminate, comprising a surface layer containing a thermoplastic urethane elastomer as a main component, an adhesive layer, a base material layer made of a thermoplastic elastomer, and a foam layer, which are laminated in this order. , An adhesive layer, a surface layer, and a base material layer are co-extruded in this order, and at least the base material layer is in a molten state. Characterized in that the base material layer of the foamed sheet is laminated and the base material layer of the laminated sheet is passed between at least two rolls until the base material layer of the laminated sheet is in a molten state, thereby laminating the laminated sheet and the foamed sheet. A method for manufacturing a covering sheet.