JP3212397B2 - Coating sheet and method for producing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is intended to cover the parts that can be touched by humans, such as interiors of automobiles, housings for office automation equipment and home electric appliances, stationery, sanitary goods, daily necessities, and interior decorations of buildings. The present invention relates to a covering sheet capable of giving a preferable soft touch feeling, that is, a soft touch feeling to the portion, and a method for producing the same.

[0002]

2. Description of the Related Art In order to impart a matte feeling (for example, a suede-like calm external appearance) to the surface of a plastic molded product or a metal molded product, a suede-like film is generally formed by a paint. . However, when a suede-like film is formed on the surface of a molded article or the like using a paint, it is necessary to adjust the viscosity and concentration of the paint, and the operation becomes complicated. A coating using an organic solvent requires a booth for drying the solvent, and further causes pollution of the working environment and safety and health problems.

In order to solve these problems, a sheet-like suede-like coating material has been proposed in place of paint.
For example, JP-A-2-4124 proposes a suede-like sheet in which a matte paint in which a bead pigment is added to a vehicle of an ionizing radiation-curable resin is applied and cured on a base film having good moldability. ing. However, since this suede-like sheet needs to be cured by irradiating an electron beam or the like after applying the ionizing radiation-curable resin composition on the film, the manufacturing process of the sheet becomes complicated and productivity can be said to be sufficient. There was nothing.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to eliminate the conventional problems of coating space and environmental problems such as solvents, and to reduce the surface of molded articles. Another object of the present invention is to provide a covering sheet capable of providing a matte appearance and a soft touch when touched.

Another object of the present invention is to provide a coating sheet which has a soft touch when touched and has a matte appearance, which causes problems of the conventional coating space and environmental problems such as solvents. And to provide a method of producing with high productivity.

[0006]

Means for Solving the Problems] cover sheet of the present invention, thermoplastic elastomers 100 parts by weight of the elastomer
Elastic fine particles 20 to 200-fold that does not melt in the extrusion conditions of over
The amount unit and extruded is <br/> is in sheet form Te in compositions based on Seo Futotatchi layer is formed having a large number of fine concave convex front surface by stretching the sheet-like material It characterized the this is, the object is achieved. The method for producing a coating sheet according to the present invention comprises a thermoplastic elastomer.
The compositions based on elastic fine particles 20 to 200 parts by weight which does not melt at the extrusion conditions of over 100 parts by weight of the elastomer is discharged into a sheet from an extruder, the sea after the
The large number of fine irregularities on the surface by preparative like material to Shin Zhang
A soft touch layer is formed , whereby the above object is achieved.

The thermoplastic elastomer used in the covering sheet of the present invention has a so-called rubber elasticity at room temperature.
A polymer material that is plasticized at high temperatures and can be processed in various ways. The types include, for example, polyurethane, polystyrene, polyolefin, polyester, polyvinyl chloride, polyamide, ionomer, fluoro rubber, 1,2 polybutadiene, trans 1,4 polyisoprene, and synthetic natural rubber. And so on.

In general, a thermoplastic elastomer often shares a rubber component (hard segment) having entropy elasticity in a molecule and a molecular constraint component (soft segment) for preventing plastic deformation, and thus a moldable range. Has a partially crosslinked structure, but does not have a wide-range three-dimensional network crosslinked structure. The hardness of these thermoplastic elastomers varies depending on the feel to be obtained and the hardness of the elastic fine particles used.
SK6301 having an A hardness of 20 to 98 is used. Also, the selection of the type of thermoplastic elastomer
In consideration of the performance desired as a covering sheet, for example, when scratch resistance and abrasion resistance are required, a urethane-based thermoplastic elastomer is preferably used.

As the thermoplastic elastomer, for example, in the case of polyurethane, there is a block copolymer having polyurethane as a hard segment and polyether, polyester, polycarbonate or the like as a soft segment. In a polystyrene system, a block copolymer having polystyrene as a hard segment and polybutadiene, polyisoprene, and polyethylene-polybutylene as soft segments (SBS, SI
(S, SEBS block copolymer), and those obtained by further hydrogenation and those having a functional group.

In the polyolefin series, those having polypropylene as a hard segment and having ethylene as a soft segment, those having a small amount of a diene component together with ethylene (EPM, EPDM, collectively EPR),
Those obtained by blending these, those partially crosslinked by further adding an organic peroxide thereto, those modified by grafting with unsaturated hydroxy monomers and unsaturated carboxylic acid derivatives, and others, butyl rubber Graft polyethylene and the like. In the case of polyesters, there are copolymers having polyester as a hard segment and polyether as a soft segment. In the case of polyvinyl chloride, a method of extremely increasing the degree of polymerization of polyvinyl chloride (linear high degree of polymerization of polyvinyl chloride, degree of polymerization of about 2,000 to 2,500), a method of introducing a three-dimensional crosslinked structure into a part of polyvinyl chloride And those obtained by a method of introducing an ion-crosslinking structure. In the case of polyamides, there are polyamides using polyamide as a hard segment and polyether as a soft segment.

[0011] The present invention cover sheet the elastic <br/> fine particles used in A (hereinafter sometimes referred to as elastic beads), when opened after pressurized to its shape is deformed, the elastic recovery a fine particle having a property, for example, polyurethane, acrylic resin (preferably acrylic - urethane resin), scan styrene - such as those made of isoprene copolymer. typically, the non-natural elastic fine particles are used.

The shape of these elastic fine particles is not limited to spherical ones, and non-spherical bodies obtained by means such as freezing and pulverization can also be used. The average particle size (size) of the elastic fine particles is usually in the range of 1 to 50 μm, preferably 5 to 40 μm,
Usually 2 parts per 100 parts by weight of the thermoplastic elastomer
0 to 200 parts by weight, preferably 50 to 150 parts by weight are added. When the average particle size is less than 1 μm, it is difficult to obtain a sheet having a sufficient soft touch feeling (moist and soft touch feeling when touched). On the other hand, the average particle size depends on the film thickness of the sheet. If it exceeds 50 μm, cracks are likely to be generated on the surface of the sheet when the sheet is spread and stretched.
On the other hand, if the amount added to 100 parts by weight of the thermoplastic elastomer is less than 20 parts by weight, it is difficult to obtain a large number of fine irregularities on the surface of the sheet. As a result, the soft touch feeling of the sheet is reduced, and the amount added is 200 parts by weight. If the number is larger, cracks are likely to be generated on the surface when the sheet is spread and stretched.

The elastic fine particles are not limited to one kind, and two or more kinds may be used in combination. When a soft thermoplastic elastomer is used, or when the surface of the covering sheet may have a slightly hard feel, for example, , Cross-linked polymethyl methacrylate,
Hard beads made of an inorganic material may be mixed with the above elastic beads and used.

The covering sheet may further contain, if necessary, materials such as a coloring agent such as a pigment and a dye, an antioxidant, an ultraviolet absorber, and an ultraviolet stabilizer. Pigments and dyes used in paints can be used as the colorant. Examples of the pigment include titanium oxide, iron oxide, carbon black, cyanine pigment, and quinacridone pigment. Dyes include azo dyes, anthraquinone dyes, indigoid dyes, and stilbenzene dyes. Further, metal powder such as aluminum flake, nickel powder, gold powder, silver powder and the like may be used as the coloring agent. These materials are preferably fine particles as much as possible. Examples of the UV stabilizer include hindered amine.

The coating sheet of the present invention comprises a thermoplastic elastomer and elastic fine particles as main components (usually 50% of the total composition).
(% By weight or more).
However, if a solid colorant such as the above-mentioned pigment or metal powder is added, the soft touch feeling that is exhibited may differ depending on the initially set amount of elastic fine particles. Therefore, in a system to which the solid colorant is added, a thermoplastic elastomer (100 parts by weight) is used. )) (The amount is usually 20 to 200 parts by weight)
But, there is a case in strange Waru within this quantitative range.

[0016] A composition as a coating sheet of the present invention is obtained by mixing and dispersing the above-mentioned materials, if necessary, comprising a thermoplastic elastomer and elastic fine particles as main components. A soft touch layer provided with fine irregularities is formed. When the covering sheet is a single layer, this soft touch layer becomes the covering sheet as it is.

The sheet has many fine irregularities on its surface.
To form formed the soft touch layer, as the manufacturing method of the coating sheet of the present invention, due to the stretching of the sheet after extrusion during or extrusion molding.

In the fine irregularities, the width of each concave or convex portion is usually about 1 to 50 μm, preferably 5 to 50 μm.
It is about 40 μm. The reason is that if the width is too small, it is difficult to obtain a sheet having a sufficient soft touch feeling (a moist soft touch feeling received when touched),
If the width is too large, the surface of the sheet tends to be easily cracked when the sheet is spread and stretched.

In the method for producing a coating sheet of the present invention, it is necessary to use, as the elastic fine particles, those which do not melt under the extrusion conditions of the thermoplastic elastomer. The reason is that, when extruded into a sheet from an extruder after being mixed with the thermoplastic elastomer, if the elastic fine particles are melted and integrated into the thermoplastic elastomer, a large number of fine irregularities are formed on the sheet surface even if it is subsequently elongated. Is not formed.

The extrusion conditions depend on the types and mixing ratios of the thermoplastic elastomer, the elastic fine particles, and the additives, but generally, the conditions generally known as the extrusion conditions of the thermoplastic elastomer are employed. For example, when a thermoplastic urethane elastomer is used, it can be extruded at a temperature of 150 to 200 ° C. Usually thermoplastic elastomers,
After mixing the elastic fine particles and the additive, the mixture is melt-kneaded and extruded by a twin-screw extruder, but may be extruded by a single-screw extruder when mixed by a Banbury mixer or the like and pelletized by a pelletizer or the like.

In the method for producing a coating sheet according to the present invention, the elongation after discharging the above composition into a sheet from an extruder may, of course, be performed in a solid state of the sheet (in this case, in this case). However, the present invention is not limited to this case, and may be performed in a semi-solid state immediately after extrusion as long as the sheet-like form is substantially maintained. Specifically, the composition may be stretched by a take-off roll or the like immediately after being discharged from the extruder, or may be stretched after being sufficiently cooled and shaped so that the sheet can be wound up.

In the case of stretching, usually, after the temperature of the sheet becomes lower than the softening temperature of the used thermoplastic elastomer, the cooled roll is brought into contact with the sheet, and the take-off is rotated at a speed higher than the discharge speed of the resin. It is done by taking over with a roll. When a cooled rubber roll or the like having a roughened surface is used, it may be near the softening temperature. Further, a tenter stretching method or the like may be employed.

The stretching magnification varies depending on the compatibility between the thermoplastic elastomer used and the elastic fine particles.
It is twice or more, more preferably twice or more. In this way
Elastic fine particles on the sheet surface is distributed by Rukoto to stretching, the surface so that the fine irregularities are formed.

The covering sheet of the present invention may be one in which a synthetic resin foam layer is further laminated on the soft touch layer. By laminating the foam layer in this way, cushioning properties can be further imparted to the covering sheet, and a more excellent soft touch feeling can be exhibited.

The laminating method is, for example, a method of laminating a foamed sheet made of a synthetic resin and a covering sheet made of a soft touch layer by heating lamination, mixing the above thermoplastic elastomer and elastic beads, and using a twin screw extruder. For example, there is a method of laminating a mixture in a molten state to a foamed layer immediately after melt-kneading and extruding (extrusion lamination). In the case of laminating by heating lamination, a method of heating the opposite side of the soft touch layer and the synthetic resin foam sheet while contacting one side of the soft touch layer (the surface where unevenness is desired to be left) with a cooling roll is preferable. In the case of extrusion lamination, it is preferable to stretch the mixture and then heat the surface to be laminated on the foamed sheet made of a synthetic resin, or laminate the film by a cooling roll without heating.

In the case of laminating a material having poor adhesion during the above lamination, it is preferable to provide a primer layer or an adhesive layer. For example, when a polyurethane-based thermoplastic elastomer layer is laminated on a polyolefin-based foamed layer, a chlorinated polyolefin layer is provided as the primer layer. As the adhesive layer, for example, a rubber-based, acrylic, urethane-based, silicone-based pressure-sensitive adhesive,
There are solvent type adhesives and hot melt type adhesives such as ethylene-vinyl acetate copolymer (EVA) and styrene-isoprene-styrene block copolymer (SIS). Further, for example, there is a microcapsule-curable post-curing adhesive. Examples of the material include an uncrosslinked unsaturated polyester adhesive, an uncrosslinked acrylic adhesive, and the like.

In the case of laminating a polyurethane-based thermoplastic elastomer layer on a polyolefin-based foamed layer, for example, a material constituting the polyolefin-based foamed layer may be modified by acid or graft beforehand, or may be formed of any of these materials. Can be blended with an unmodified polyolefin, or a modified polyolefin can be laminated on an unmodified polyolefin foam sheet to improve the adhesion.

Examples of the material constituting the foamed sheet made of the above synthetic resin include polyolefin resins such as polypropylene and polyethylene; polystyrene resins such as polystyrene and styrene-maleic anhydride copolymer;
Foamable resin materials such as polyurethane resin, polyvinyl chloride resin, and various thermoplastic elastomer resins are used, and a foam made of such a resin is used. The expansion ratio of these foams is usually 5 to exhibit a soft touch feeling.
５０50 times, preferably 20 to 50 times.

The covering sheet of the present invention may be a sheet in which a layer made of a thermoplastic resin is further laminated on the soft touch layer. By having a layer made of a thermoplastic resin, elastic beads can be contained only in the surface layer of the sheet, and the amount of the elastic beads used can be reduced. In addition, by using the same type of resin as the resin to be laminated later on the layer made of the thermoplastic resin, for example, when the resin is integrated with the molten resin in a mold at the time of manufacturing an injection-molded product, the adhesion becomes good.

The method of laminating is roughly classified into a method of laminating a sheet made of a thermoplastic resin and a sheet for coating of the present invention by heat lamination, similar to the case of providing a foam layer, the method of laminating the above thermoplastic elastomer and the elastic beads. And then laminating the mixture in a molten state to a sheet made of a thermoplastic resin (extrusion lamination) immediately after melt-kneading and extruding with a twin-screw extruder or the like. In the case of laminating by heating lamination, one side of the sheet obtained by the method of the present invention (surface on which unevenness is to be left) is brought into contact with a cooling roll,
A method of laminating a sheet made of a thermoplastic resin on the opposite side while heating is preferable. When performing extrusion lamination,
After the above mixture is stretched, it is preferable to heat the surface to be laminated on the foamed sheet made of a synthetic resin or without heating, and laminate by a cooling roll.

Examples of the material constituting the sheet made of the thermoplastic resin include the thermoplastic elastomer, polystyrene, acrylic polymer, polycarbonate, and the like.
Polyvinyl chloride, polyethylene, polypropylene, AB
S (acrylonitrile-butadiene-styrene copolymer), modified polyphenylene oxide, polyphenylene sulfide, polyetherimide, polyetheretherketone, ionomer, and the like. These sheets are more preferably made of a thermoplastic elastomer in the case of providing a softer soft touch feeling formed by known molding such as extrusion molding and calendering.

When laminating a material having poor adhesion at the time of laminating, it is preferable to provide a primer layer or an adhesive layer similarly to the case of laminating the foamed layer.

Further, as an embodiment of the coating sheet of the present invention,
A layer in which a thermoplastic resin layer and a synthetic resin foam layer are sequentially laminated on a soft touch layer can also be employed. For the covering sheet having a thermoplastic resin layer and a synthetic resin foam layer, a method of laminating the soft touch layer by heat lamination after preparing the respective sheets, or a method of forming a thermoplastic resin in a molten state on a sheet made of a synthetic resin foam It is obtained by laminating a resin, creating a two-layer sheet having a layer made of a thermoplastic resin and a layer made of a synthetic resin foam, and then laminating a soft touch layer to a layer made of a thermoplastic resin by heat lamination or the like. Can be When laminating materials with poor adhesion during the above lamination,
It is preferable to provide a primer layer and an adhesive layer as described above. On the thermoplastic resin layer or the synthetic resin foam layer, a sheet having a pattern such as printing by the above-described method may be laminated in order to enhance designability.

Various functionalizing agents can be added to impart various functions to the coating sheet produced by the present invention. Examples of the above-mentioned various function-imparting agents include a conductive material, an anti-condensation agent, and a photochromic compound.

The thickness of the coating sheet of the present invention thus obtained varies depending on the sheet constitution, but generally, the layer composed of the thermoplastic elastomer and the elastic beads has a thickness of 5%.
~ 500 μm, sheet made of synthetic resin foam is 500
~ 5000 μm, 100 sheets made of thermoplastic resin
１０００1000 μm.

[Method of Using Sheet for Coating] The sheet for coating obtained in the present invention has various methods of use as described below. In a method such as injection molding or stamping molding, in which a coating sheet is introduced into a mold in advance and then attached to a molded product at the same time as molding, the sheet is placed inside the mold at room temperature or heated, and vacuum molding or air pressure molding is performed. The molding is brought into close contact, and then normal molding is performed. If the spread rate of the sheet is small,
If there are no small corners, it may not be necessary to pre-adhere the sheet to the inside of the mold.

In a continuous production method such as extrusion molding or pultrusion molding, for example, a method in which a coating sheet is introduced into a mold and then applied to a molded product simultaneously with continuous molding, or the coating sheet comes out of the mold. Immediately after, before sizing, there is a method of attaching, after sizing, cooling, etc. In the method of introducing the covering sheet into the mold, the covering sheet is rolled in front of and in the middle of the mold. In the method of attaching the covering sheet immediately after molding, the covering sheet is adhered along a surface of the molded article with a pressure roller.

In the vacuum (pressure) molding, the coating sheet of the present invention is laminated on a sheet to be molded in advance, and is performed by a usual method. Affixing to a long member such as wood or aluminum sash is performed using a commercially available profile laminator or the like. At this time, it is preferable to provide an adhesive layer in order to improve the adhesion to the adherend. The covering sheet on which the pressure-sensitive adhesive is laminated is attached to the molded product by hand application or by a double vacuum molding machine (applying machine) or the like.

[Use of Covering Sheet] Since this covering sheet imparts a soft touch feeling to the product surface, the covering sheet covers an unconsciously or consciously touched (possible) person. Used. Examples of objects to be covered are door panels, instrument panels, handles, gear lever knobs, door knobs, armrests, as automobile interior parts.
Housing for home appliances such as various switches, seats, ceiling materials, etc., housing for OA products such as portable products (telephones, cassette tape recorders, compact discs, televisions, etc.), telephones, refrigerators, televisions, etc. As a personal computer, a printer, a keyboard, etc., as furniture products, chairs, desks, tables, clothes dance, etc., as an architectural interior, as a sash frame, fir wood, various doors, wallpaper, etc., as a sanitary, bathroom product, etc. Toilet seats, bathtubs, chairs, mats, shelves, etc., sports equipment, bats, rackets, clubs, etc. grips, protective pads, etc., daily necessities, stationery products, various housings, cases, containers, etc. Bench, chair, table, sofa, pillow and the like.

[0040]

SUMMARY OF invention cover sheet is a thermoplastic elastomers
100 parts by weight and do not melt under the extrusion conditions of the elastomer
It is extruded into a sheet and have bullet resistance fine particles 20 to 200 parts by weight of Te in the composition mainly, to stretch the sheet-like material
Since Seo Futotatchi layer having a large number of fine concave convex on the front surface is formed by Rukoto, on the surface of molded articles, to impart a soft-touch feel when matte feeling and touching in appearance Can be done. Production method of the present invention coated sheet, the thermoplastic elastomers 100 parts by weight and the elastic fine particles which do not melt at the extrusion conditions of the elastomer 20 to 200-fold
The compositions based on the amount unit, discharged from the extruder into a sheet, to form a soft touch layer having a large number of fine irregularities on the surface by Shin Zhang said sheet after its
Runode a tactile soft touch when Tsu touch, the coating sheet appearance has a matte feel, to generate environmental problems such as problems and solvents conventional painting space without very good productivity simple Can be manufactured.

[0041]

Embodiments of the present invention will be described below.
The value of “area of die lip / cross-sectional area of sheet” indicates the degree of elongation of the sheet. (A) Preparation of Sheet for Coating Hereinafter, “parts” means “parts by weight” in terms of solid content.

Example 1 A thermoplastic urethane elastomer resin (manufactured by Nippon Miractran Co., Ltd., polyether urethane elastomer, E375)
MNAT, JIS A hardness 75) 100 parts Elastic beads (SEKISUI CHEMICAL INDUSTRIES CO., LTD., EAX15 (clear), crosslinked acrylic acid ester elastic beads, average particle size 15 μm) 100 parts The above thermoplastic elastomer and elastic beads Mixture of 2
The resin was extruded downward from a coaxial kneading extruder (PCM-30, manufactured by Ikegai Iron Works Co., Ltd.) at a resin temperature of 180 ° C. The resin sheet, which was stretched while being air-cooled and had a temperature of about 125 ° C. at a position about 17 cm immediately below a mold lip (width 2 mm, length 130 mm), was contacted with a guide roll at 20 ° C. and cooled. ,
The sheet was taken out while being stretched by a take-up roll rotating at a speed higher than the resin discharge speed, and a coating sheet having a soft touch feeling with a large number of fine irregularities formed on the surface was obtained (thickness 500 μm, width 52 mm). ).

The set temperature conditions were as follows. Screw screw back 140 ℃, middle 160 ℃, front 170 ℃, die 17
0 ° C. Table 1 shows the value of the area of the mold lip / the cross-sectional area of the obtained covering sheet (hereinafter simply referred to as “the cross-sectional area of the sheet”), the state of surface irregularities confirmed by an electron microscope, and the evaluation result of soft touch feeling. It was shown to. Further, when the external appearance was visually observed, it was found that there was no abnormality such as crack generation and a matte feeling. In the evaluation of soft touch feeling, a total of 70 or more points were evaluated as good (those with less than 50 points) according to the following criteria, based on the feeling obtained by 30 monitors touching the covering sheet. 1 point: Not soft touch 2 points: Not soft touch 3 points: Soft touch

Example 2 Thermoplastic urethane elastomer resin (manufactured by Nippon Miractran Co., Ltd., polyester urethane elastomer, E785)
QSDH, JIS A hardness 87) 100 parts Elastic beads (SEKISUI CHEMICAL INDUSTRIES CO., LTD., EAX15 (black), crosslinked acrylic acid ester elastic beads, average particle size 15 μm) 100 parts The above thermoplastic elastomer and elastic beads Was extruded at a resin temperature of 185 ° C. under the following set temperature conditions, and the temperature of the resin sheet at a position about 17 cm immediately below the mold lip was 130 ° C.
° C, and a coating sheet was obtained in the same manner as in Example 1 except that the coating sheet had a thickness of 650 µm and a width of 62 mm. Setting conditions: 150 ° C at the back of screw screw, 165 ° C at the middle, 175 ° C at the front, 175 ° C at the die Die lip area / sheet cross-sectional area value, surface unevenness confirmed by electron microscope, evaluation of soft touch feeling The results are shown in Table 1. Further, when the external appearance was visually observed, it was found that there was no abnormality such as crack generation and a matte feeling.

Example 3 Thermoplastic urethane elastomer resin (manufactured by Nippon Miractran Co., Ltd., polyether urethane elastomer, E375
MNAT, JIS A hardness 75) 100 parts Elastic beads (made by CU Chemie Uetikon AG, deco silk (transparent NY18), polyurethane elastic beads, average particle size 18 μm)
100 parts The mixture of the thermoplastic elastomer and the elastic beads was extruded at a resin temperature of 180 ° C. under the following set temperature conditions. The temperature of the resin sheet about 17 cm below the mold lip is 125 ° C
Met. The coating sheet obtained in substantially the same manner as in Example 1 except for the take-off speed had a thickness of 350 μm and a width of 50 mm. Setting conditions: 140 ° C at the back of screw screw, 160 ° C at the middle, 170 ° C at the front, 170 ° C at the die Die lip area / sheet cross-sectional area value, surface unevenness confirmed by electron microscope, evaluation of soft touch feeling The results are shown in Table 1. Further, when the external appearance was visually observed, it was found that there was no abnormality such as crack generation and a matte feeling.

Example 4 100 parts of a thermoplastic urethane elastomer resin (manufactured by Nippon Milactran Co., Ltd., polyether type urethane elastomer, E375MNAT, JIS A hardness 75) 50 parts Elastic beads (same as those used in Example 1) A mixture of a thermoplastic elastomer and elastic beads was extruded at a resin temperature of 180 ° C. under the following set temperature conditions. The temperature of the resin sheet about 17 cm below the mold lip is 125 ° C
Met. The coating sheet obtained in substantially the same manner as in Example 1 except for the take-up speed was 800 μm in thickness and 81 mm in width. Setting conditions: 140 ° C at the back of screw screw, 160 ° C at the middle, 170 ° C at the front, 170 ° C at the die Die lip area / sheet cross-sectional area value, surface unevenness confirmed by electron microscope, evaluation of soft touch feeling The results are shown in Table 1. Further, when the external appearance was visually observed, it was found that there was no abnormality such as crack generation and a matte feeling.

Example 5 Thermoplastic urethane elastomer resin (manufactured by Nippon Milactran Co., Ltd., polyester urethane elastomer, E785QSDH, JIS A hardness: 87) 100 parts Elastic beads (same as those used in Example 1) 150 parts The mixture of the thermoplastic elastomer and the elastic beads was extruded at a resin temperature of 185 ° C. under the following set temperature conditions, and the temperature of the resin sheet at a position about 17 cm immediately below the mold lip was 130 ° C.
° C, and a coating sheet was obtained in substantially the same manner as in Example 1, except that the coating sheet had a thickness of 400 µm and a width of 43 mm. Setting conditions: 150 ° C at the back of screw screw, 165 ° C at the middle, 175 ° C at the front, 175 ° C at the die Die lip area / sheet cross-sectional area value, surface unevenness confirmed by electron microscope, evaluation of soft touch feeling The results are shown in Table 1. Further, when the external appearance was visually observed, it was found that there was no abnormality such as crack generation and a matte feeling.

Example 6 100 parts of a thermoplastic urethane elastomer resin (polyether type urethane elastomer, manufactured by Nippon Milactran Co., Ltd., E785QSDH, JIS A hardness 87) 150 parts Elastic beads (same as those used in Example 1) The mixture of the thermoplastic elastomer and the elastic beads was extruded downward at a resin temperature of 180 ° C. from a biaxial co-axial kneading extruder (PCM-30, manufactured by Ikegai Iron Works, Ltd.) under the following set temperature conditions. It is stretched while being cooled by air, and the mold lip (width 2mm,
The temperature is about 1 at a position about 17 cm directly below (length 130 mm).
The resin sheet at 25 ° C. is cooled by contacting the guide roll at 20 ° C., and is further taken out while stretching the sheet with a take-up roll rotating at a speed higher than the resin discharge speed, to a thickness of 1.5 mm. A sheet having a width of 120 mm was obtained (area of die lip / cross-sectional area of sheet = 1.44). Setting conditions: screw screw back 140 ° C, middle 160 ° C, front 170 ° C, die 170 ° C

A sample of 50 mm × 50 mm was cut out from the obtained sheet and further cut by a tenter stretching apparatus.
Biaxially stretched at 35 ° C., thickness 670 μm, width 75 mm
Thus, a coating sheet having a soft touch feeling with a large number of fine irregularities formed on the surface was obtained. Table 1 shows the surface unevenness and soft touch feeling confirmed with an electron microscope. or,
When the appearance was visually observed, there was no abnormality such as generation of cracks and a matte feeling.

[Table 1]

Comparative Example 1 100 parts of a thermoplastic urethane elastomer resin (same as that used in Example 1) were extruded and stretched under the same conditions as in Example 1 to obtain a resin sheet. Comparative Example 2 100 parts of a thermoplastic urethane elastomer resin (same as that used in Example 1) Elastic beads (same as that used in Example 1) 100 parts The above mixture was extruded under the same conditions as in Example 1. A resin sheet was obtained without elongation.

Comparative Example 3 100 parts of polypropylene resin (MA8 manufactured by Mitsubishi Yuka Co., Ltd.) 100 parts of elastic beads (same as used in Example 1) 100 parts The mixture of the above polypropylene resin and elastic beads was prepared under the following set temperature conditions. A resin sheet was obtained in substantially the same manner as in Example 1 except that the resin sheet was extruded. Setting conditions: screw screw back 190 ° C, middle 200 ° C, front 210 ° C, die 210 ° C

Table 2 shows the values of the area of the mold lip / the cross-sectional area of the sheet, the state of the surface irregularities confirmed by an electron microscope, and the soft touch feeling in Comparative Examples 1 to 3. The evaluation of soft touch feeling was performed in the same manner as in Example 1, and those having less than 50 points were regarded as defective.

[Table 2]

Example 7 A polypropylene foam sheet having an expansion ratio of 25 was added to a sheet having a thickness of 10
After heating the acid-modified PP film surface of a 2 mm-thick PP-based sheet on which a μm maleic acid-modified polypropylene film (Admer QB521 manufactured by Mitsui Petrochemical Industry Co., Ltd.) was laminated to 140 ° C., The prepared covering sheet (without heating) was laminated by heat lamination.
A rubber roll at room temperature was used as a laminating roll. When the soft touch feeling of the elastic bead-containing layer of the covering sheet on which the foam sheet was laminated was evaluated in the same manner as in Example 1, the soft touch feeling was good.

Example 8 A polyurethane foam sheet having a thickness of 3 mm (foaming ratio: 20
2) was heated to 150 ° C., and the coating sheet (not heated) prepared in Example 1 was laminated by heat lamination. A rubber roll at room temperature was used as a laminating roll. When the soft touch feeling of the elastic bead-containing layer of the covering sheet on which the foam sheet was laminated was evaluated in the same manner as in Example 1, the soft touch feeling was good.

Example 9 Thermoplastic Elastomer Sheet (Mitsui Petrochemical Industry Co., Ltd.)
A wood pattern was screen-printed on a 400 μm-thick Mirastomer 8030N, and a primer layer of 5 μm was further laminated on the sheet, and a primer layer of 140 was used as a primer (Supercron 822 manufactured by Sanyo Kokusaku Pulp Co., Ltd.).
C., and the coating sheet (not heated) prepared in Example 2 was laminated by heat lamination. A rubber roll at room temperature was used as a laminating roll. When the soft touch feeling of the elastic bead-containing layer of the covering sheet on which the elastomer sheet was laminated was evaluated in the same manner as in Example 1, the soft touch feeling was good.

Example 10 Thermoplastic Elastomer Sheet (Mitsui Petrochemical Industry Co., Ltd.)
The same primer layer (thickness) as that used in Example 9 was obtained by laminating (400 μm) a 2 mm thick polypropylene foam sheet (expansion ratio: 25 times) and laminating the laminate sheet (400 μm). 5 μm), the primer layer was heated to 140, and the coating sheet (not heated) prepared in Example 2 was laminated by heat lamination. A rubber roll at room temperature was used as a laminating roll. When the soft touch feeling of the elastic bead-containing layer of this covering sheet was evaluated in the same manner as in Example 1, the soft touch feeling was good.

[0057]

The coating sheet of the present invention is made of a thermoplastic elastomer.
Dissolve 100 parts by weight of tomer with the elastomer under extrusion conditions.
20 to 200 parts by weight of non-melting elastic fine particles
The composition is extruded into a sheet with the composition
A source with many fine irregularities on the surface by stretching
Since Futotatchi layer is formed on the surface of the formed shape Hinto, soft-touch feel it is possible to impart when matte feeling and touching in appearance. The method for producing the coating sheet of the present invention comprises the steps of:
Elastic fine particles 20 to 2 that do not melt under the extrusion conditions of the stomer
And 100 parts by weight of the composition as a main component.
To discharge the sheet, and then stretch the sheet.
Soft touch layer with many fine irregularities on the surface
Because it forms a touch soft touch when Tsu touch, the coating sheet appearance has a matte feel, without causing environmental problems such as problems and solvents conventional painting space may very productive It can be manufactured at low cost.

Claims (2)

(57) [Claims] 1. A thermoplastic elastomers 100 parts by weight of the
Does not melt at the extrusion conditions of elastomeric elastic fine particles 20
Sheet to Te in compositions based on the 200 parts by weight
Extruded, Seo Futotatchi layer is formed having a large number of fine concave convex front surface by stretching the sheet-like material
Coating sheet, wherein a child is. 2. A thermoplastic elastomers 100 parts by weight and the elastic fine particles do not melt at the extrusion conditions of the elastomer 20
The compositions based on a 200 parts by weight, discharged from the extruder into a sheet, soft touch having a large number of fine irregularities on the surface by Shin Zhang said sheet after its
A method for producing a coating sheet, comprising forming a layer .