JPH08176312A - Surface-decorated sheet and its production - Google Patents

Abstract

PURPOSE: To provide a surface-decorated sheet equally excellent in flexural resistance, luster, smoothness, heat resistance, scratch resistance and solvent resistance, having a three-dimensionally cross-linked coating film from an ionizing radiation-curable resin layer dispersed with short fibers of glass or thermoplastic resin. CONSTITUTION: This surface-decorated sheet has a three-dimensionally cross-linked coating film from an ionizing radiation-curable resin layer dispersed with short fibers of glass or thermoplastic resin. One or both sides of the coating film lie provided with patterned layer(s) or embossed pattern(s). This sheet is obtained by the following process: an ionizing radiation-curable resin dispersed with short fibers of glass or thermoplastic resin is sandwiched between two base material sheets and pressed, and one or both of the sheet surfaces is (are) irradiated with ionizing radiation to effect cross-linking and curing, and the base material sheets are then peeled off and removed. A specific version of the process is as follows: a cylinder having a desired surface design is revolved around the axial center, and base material sheets are fed at a velocity synchronous with the surface velocity of the cylinder and an ionizing radiation-curable resin is sandwiched in between the sheets and pressed on the cylindrical surface, and the surface is then irradiated with ionizing radiation to effect cross- linking and curing of the resin.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to film formation of an ionizing radiation curable resin, and relates to a method of manufacturing a surface decorative sheet of a thin and thin product which is excellent in bending workability and is excellent in uneven shape.

[0002]

2. Description of the Related Art For conventional bending work or surface makeup of a three-dimensional molded article, a V-shaped groove cutting portion is provided on a flat plate portion after a decorative sheet made of a thermoplastic resin is attached to a substrate such as plywood. The so-called V-cut box, which is bent, has been used. (It is described in Japanese Utility Model Publication No. 15-31122, Japanese Utility Model Publication No. 56-7866, etc.) Also, a decorative sheet made of a thermoplastic resin sheet preformed by vacuum forming or the like is coated on a molded article of the thermoplastic resin. There has also been a method of directly attaching a decorative sheet to a molded product. (JP-B-56-45768, JP-A-4-2)
No. 88214. ), Any of the methods is a thermoplastic resin having excellent moldability and bending workability, such as polyvinyl chloride, acrylic resin, and AB.
It was used after printing, embossing, or other processing on a sheet of S, polyolefin, or the like. Molded products that have been surface-coated with these thermoplastic resin layers are inferior in surface physical properties such as surface gloss, smoothness, heat resistance, scratch resistance, and solvent resistance to three-dimensionally cross-linked and cured coated products. It is a thing.

In order to improve the surface properties of molded articles, a so-called "ionizing radiation-curable resin layer" prepared by crosslinking a polyfunctional acrylic, epoxy, unsaturated polyester or other prepolymer or monomer with ionizing radiation such as ultraviolet rays. Has been applied to a thermoplastic resin layer to be used as a surface protective layer.

[0004]

However, although the ionizing radiation curable resin layer has excellent surface physical properties such as surface gloss, smoothness, heat resistance, scratch resistance and solvent resistance, it is provided on the surface layer of the decorative sheet. Since it is hard and brittle, there is no particular problem when it is attached to a flat surface, but there is a problem that cracks and fractures are likely to occur in the curved portion and the flexibility such as bending is poor. Further, the above-mentioned "ionizing radiation curable resin" was directly applied to the surface of a molded article to improve the surface properties of the thermoplastic resin. When an ionizing radiation-curable resin composition is applied to the surface of this molded article in an uneven shape, the composition flows to the concave portion until it is cured, and therefore the thickness of the applied resin layer is large in the concave portion. However, there is a problem that the convex portion becomes thin. Further, when the material to be coated is an absorptive material, there is a problem in that there is uneven absorption, and in addition to loss of the expensive resin composition, uneven gloss occurs due to uneven application on the surface. Further, the application of the ionizing radiation-curable resin composition to the molded product is a multi-product, small-lot production, and the trouble of preparing the resin composition, cleaning the viscous coating solution, etc., especially the coating device, the drying and curing device. However, there is a problem in that workability and cost are largely inferior to those of the method for attaching a surface decorative sheet, because of the need for a shape.

The present invention has been made in order to solve the above problems, and has the flexibility, uniform gloss, smoothness, heat resistance, scratch resistance, solvent resistance, etc. necessary for processing. It is an object of the present invention to provide a decorative sheet having the above-mentioned physical properties and a method for producing the same.

[0006]

In order to achieve the above object, the surface decorative sheet of the present invention comprises a glass or a thermoplastic resin short fiber dispersed in a three-dimensional crosslinked coating film of an ionizing radiation curable resin layer. It was done. The surface decorative sheet is provided with a pattern layer or a concavo-convex pattern on one surface or both surfaces of the coating film. According to the invention of claim 3, an ionizing radiation curable resin composition in which glass or thermoplastic resin short fibers are dispersed is sandwiched between two base sheets and pressed, and then either one of the sheets,
Alternatively, it is a method for producing a surface decorative sheet, which comprises irradiating ionizing radiation from the surfaces of both sheets, crosslinking and curing the same, and then peeling and removing the base sheet. According to the invention of claim 4, a cylinder having a desired surface shape is rotated about an axis, and the base material sheet is supplied at a speed synchronized with the surface speed of the cylinder, and a short fiber of glass or thermoplastic resin is supplied. In a state in which a liquid ionizing radiation curable resin composition in which the
The base material sheet is pressed against the surface of the cylinder, and then the base material sheet side, the cylinder side, or both sides are irradiated with ionizing radiation to crosslink and cure the resin composition, and then the cylinder. A method for producing a surface decorative sheet, which comprises peeling a base material sheet and a cross-linking coating film of the ionizing radiation curable resin composition from the surface and then peeling and removing the base material sheet.

In the surface decorative sheet of the present invention, a base sheet "B" 2 as shown in FIG. 1 (a) is provided with an ionizing radiation curable resin layer 3 containing short fibers of glass or thermoplastic resin, As shown in 2 (b), the base material sheet “A” 1 is attached to the resin layer and pressed, and the ionizing radiation is irradiated from the ionizing radiation irradiating section 6 to cure the ionizing radiation curable resin layer 3 and Figure 1
As shown in (c), the base sheet "B" 2 and the unnecessary base sheet "A" 1 (not shown) are peeled off to form a three-dimensionally cross-linked surface decorative sheet 31.

The coating method for forming the surface decorative sheet is a comma coating or reverse roll coating of a composition comprising the above ionizing radiation-curable resin and short fibers on a base sheet serving as a releasable support. , Knife coating and lip coating can be appropriately selected from the usual methods. The thickness is 5 μm to 100 μm, preferably 10 to 60 μm. If it is 5 μm or less, sufficient scratch resistance cannot be obtained, and if it is 100 μm or more, the surface decorative sheet after curing may lack bending resistance.

The base sheets "A" and "B" used for forming the surface decorative sheet of the present invention have a desired surface shape (perfect mirror surface, matte, fine uneven pattern, pattern) on the surface of the surface decorative sheet. And to prevent short fibers dispersed in the ionizing radiation curable resin from protruding from the surface of the coating film. Then, it is made of a material that is transparent to the ionizing radiation to be used, and is provided on the surface side of the coating film that forms the surface makeup so that the shaped surface of the base sheet having a desired surface shape is in contact with the coating film. The base sheet on the back side is a mirror surface when the transparency of the decorative sheet is important, or a matte surface when the adhesiveness due to the anchoring effect is important.
Slightly uneven. The ionizing radiation curable resin composition,
It can be applied to the base sheet "A" or "B", or both. However, the base sheets "A" and "B" are to be finally peeled off and removed, and it is necessary that they are not completely adhered to the surface decorative sheet which is a cured product of the ionizing radiation curable resin layer. Is. The material of the base material sheet is polyester such as polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate or polyarylate, polyolefin such as polyethylene or polypropylene, nylon 6, nylon 66, nylon 9
Such as polyamide. Although the thickness of the sheet depends on the material and the processing method, a stretched or unstretched film of 20 to 200 μm is used. If necessary, a release layer made of silicone resin, wax, melamine resin or the like may be provided on the coating film side.

The surface shape of the base sheet is a mirror surface (JIS-
Center line average center line average roughness Ra defined by B-0601
Symbol ≦ 1 μm, fine matte unevenness (Ra = 1 to 2)
Random unevenness of 0 μm), hairlines, lines (parallel straight line group, parallel line group of periodic function curve) striations, satin finish, etc. In one embodiment, as shown in FIG. 4 (a), a transfer layer is provided in which a pattern layer 7 that can be peeled from the base sheet is provided on one or both surfaces of the base sheet "A" 1 or "B" 2. The transfer layer of the publicly known transfer sheet is brought into contact with the ionizing radiation curable resin layer 3 to apply and cure it, and then only the base sheet is peeled and removed to obtain a surface decorative sheet 32 having a pattern layer.
It is also possible to bond the substrate 5 to the substrate 5 via the adhesive layer 4 as shown in FIG. 4 (b).

As another aspect, although not shown, a resin layer having an easily adhering property is provided in advance as a transfer layer on the side of the base material sheet that is to be bonded to the flat plate of the cured coating film, and this transfer is performed. An ionizing radiation curable resin may be applied to the layer and cured to form a cured coating film having an easily adhesive layer. This makes it possible to strengthen the adhesive force when the cured coating film is adhered to the substrate. A non-crosslinking type thermoplastic resin can be mainly used as the resin having an easily adhesive property. For example, nitrified cotton, cellulose derivatives such as cellulose acetate, acrylic resins such as polymethyl acrylate, polybutyl acrylate, methyl polymethacrylate, butyl polymethacrylate, vinyl chloride / vinyl acetate copolymer, polyvinyl acetate , Polystyrene, etc., or a mixture of two or more thereof is used. The film thickness is 1 to 10 having a function as a primer for adhesion strengthening.
μm.

Either the base sheet "A" or "B" can be replaced by the cylinder 26 shown in cross-section in FIG. In this case, the cylindrical surface can have a desired shape (mirror surface, matte fine unevenness, fine unevenness pattern). The cylinder 26 is a material having a strength as a rigid body that is releasable from the coating film made of the ionizing radiation curable resin composition 30 discharged from the discharge nozzle 8 and does not deform when the coating film is pressed. To use. Examples include metals such as iron and copper, ceramics such as glass, and the like. The axial length of the cylinder is the same as or longer than that of the surface decorative sheet, and its diameter is selected in consideration of the irradiation time of ionizing radiation, the processing speed, etc. so that the processing becomes easy. Usually, the diameter is 20 to 100 cm. A method for pressing and curing the coating film between the cylinder 26 and the base sheet 1 is described in JP-A-5-169.
015, Japanese Patent Publication No. 5-36212, USP4
According to the method described in 576850, and
It is preferable that the base sheet 1 and the surface decorative sheet 31 are wound in a laminated state, the surface decorative sheet is attached to the substrate, and then the base sheet is peeled and removed. Further, the ionizing radiation curable resin is either a cylinder or a substrate sheet,
Or it can be applied to both.

The monomer component constituting the ionizing radiation-curable resin used in the present invention is a monomer that can be crosslinked by ionizing radiation, and contains two or more acryloyl groups in one molecule.
Alternatively, it has a molecular weight of 100 to 1000, more preferably 250 to 800, having a radically polymerizable unsaturated group such as a methacryloyl group or a cationically polymerizable functional group such as an epoxy group. Specifically, diethylene glycol di (meth) acrylate [(meth) acrylate represents methacrylate or acrylate. The same applies hereinafter], neopentyl glycol di (meth) acrylate, tetraethylene glycol di (meth) acrylate, tripropylene glycol di (meth) acrylate, polypropylene glycol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate 1,9-nonanediol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, tetramethylolmethane tetra (meth) acrylate, dipentaerythritol hexa (meth) acrylate, etc. are used. it can.

The prepolymer, which is a constituent of the ionizing radiation-curable resin, can be crosslinked by ionizing radiation, and has two or more acryloyl groups in one molecule, or radically polymerizable unsaturated groups such as methacryloyl groups, or the like. Molecular weight having cationically polymerizable functional group such as epoxy group 200 to 100
00, more preferably 1000 to 5000. Specifically, polyester (meth) acrylate,
Urethane (meth) acrylate, epoxy (meth) acrylate, etc. can be used. Among these, urethane (meth) acrylate is preferable, which has both elongation and scratch resistance of the surface when or after being bonded to a substrate having an uneven surface. In addition to the above, it is also possible to use a composition in which two or more kinds of monomers are combined, a prepolymer and a prepolymer, or a combination of a monomer and a prepolymer.

Examples of the prepolymer having a cationically polymerizable functional group include bisphenol type epoxy resin,
Epoxy resin such as novolac type epoxy resin, alicyclic epoxy resin, aliphatic type epoxy resin, vinyl ether type resin such as aliphatic type vinyl ether, aromatic vinyl ether, urethane type vinyl ether, ester type vinyl ether, cyclic ether type compound , Spiro compounds and other prepolymers. As an example of the monomer having a cationically polymerizable functional group, the above-mentioned prepolymer monomer having a cationically polymerizable functional group can be used.

When the ionizing radiation-curable resin is cured with ultraviolet rays or visible rays, a photopolymerization initiator is added. In the case of a resin system having a radically polymerizable unsaturated group, acetophenones, benzophenones, thioxanthones, benzoin, benzoin methyl ether, Michler benzoin benzoate, Michler's ketone, diphenyl sulfide, dibenzyl disulfide, diethyl oxide,
Triphenylbiimidazole, isopropyl-N, N-dimethylaminobenzoate and the like can be used alone or in combination. Further, in the case of a resin system having a cationically polymerizable functional group, an aromatic diazonium salt, an aromatic sulfonium salt, a metallocene compound, a benzoin sulfonate ester, a fryloxysulfoxonium salt,
A diallyl iodosyl salt or the like can be used alone or as a mixture. The addition amount of these photopolymerization initiators is 0.1 to 10 parts by weight with respect to 100 parts by weight of the ionizing radiation curable resin.

Ionizing radiation means electromagnetic waves or charged particle beams having energetic particles capable of cross-linking molecules, and usually ultraviolet rays or electron beams are used. As the ultraviolet ray source, a light source mainly containing ultraviolet rays having a wavelength of 2000 to 4000 Å such as an ultrahigh pressure mercury lamp, a high pressure mercury lamp, a low pressure mercury lamp, a carbon arc, a black light lamp and a metal hydrate lamp can be used. Electron beam sources include Cockcrofton-Walton type, Van de Graaff type, Resonance transformer type, Insulation core transformer type or parallel latitude type, Dynamitron type,
100 to 10 using various electron beam accelerators such as high frequency type
Those which irradiate with electrons having an energy of 00 KeV, preferably 100 to 300 KeV can be used.

The short fibers dispersed in the ionizing radiation-curable resin are colorless and transparent, having a refractive index similar to that of the cured ionizing radiation-curable resin, having a diameter of 0.1 to 5 μm and a length of 1 to 1. Select from those having a shape of 10 μm that does not hinder the application process such as being caught. In order to make the thickness of the coating film uniform and obtain smoothness, it is preferable that the diameter and the length of the fiber be smaller than the coating thickness. The material forming the short fibers is a material having high tensile strength, such as glass (soda glass, quartz glass, etc.), in order to prevent breakage and cracks due to the tension of the coating film.
Choose. In order to further increase the breaking elongation, a material larger than the breaking elongation of the coating film, for example, polyethylene terephthalate, polyethylene, polypropylene, nylon,
Select from acrylonitrile, vinylon, etc. Also,
Vinylon, nylon, polyethylene, polypropylene, which is a material with both higher flexural strength and flexural modulus at break (lower flexural modulus) than the coating film in order to give the coating film flexibility and prevent it from breaking and cracking when bent. Select from the following.

The adhesive used for attaching the surface decorative sheet and the substrate is made of vinyl acetate emulsion, vinyl acetate / acrylic acid ester copolymer emulsion, synthetic rubber latex, two-component curing type polyurethane, etc. To be selected appropriately. The adhesive may be applied to either the substrate or the surface decorative sheet, or to both surfaces. Further, when only the resin layer having the above-mentioned easily adhesive property has sufficient adhesive strength, the adhesive layer may be omitted.

When the surface decorative sheet is attached to a substrate which is a molded product having an uneven shape, it is carried out by the injection molding simultaneous laminating method disclosed in JP-B-50-19132, JP-B-63-6339 and the like. . In this method, first, a surface decorative sheet is inserted between the female mold and the male mold so that the surface of the ionizing radiation curable resin faces the female mold side (having no injection hole). If necessary, after preforming a surface decorative sheet on the surface of the female mold, closing both molds, injecting molten resin from the injection hole into the cavity (forming cavity) between both molds, and cooling and solidifying the injected resin Then, both molds are opened, and the molded product and the surface decorative sheet adhered to it are taken out from the mold. Further, at this time, the base sheet on the back surface side of the decorative sheet can be subjected to the above steps while being attached, and after taking out from the mold, the base sheet can be peeled off to leave only the surface decorative sheet in the molded product. . By doing so, the stress received during molding of the base material sheet is dispersed, so that the surface decorative sheet is effectively prevented by cracking and can be provided even on a material having a large unevenness.

Further, the vacuum forming simultaneous laminating method disclosed in JP-B-56-45768 and JP-A-5-57786 can be used. This method
The surface decorative sheet is placed above the substrate on which the surface decorative sheet is provided so that the ionizing radiation curable resin faces the side opposite to the substrate. Then, the surface of the substrate is coated with the surface decorative sheet by vacuum suction from the substrate side. When a heat-sensitive type adhesive is used as the adhesive, the surface decorative sheet is heated with a heater to activate the adhesive before, at the same time as, or after coating the surface decorative sheet on the substrate surface. In the case of sticking with the base material sheet attached, the base material sheet is positioned on the opposite side of the base material and stuck, and then removed.

Japanese Patent Publication No. 59-51900, Japanese Patent Publication No. 6
The lapping method disclosed in Japanese Patent Publication No. 1-5895 and Japanese Patent Publication No. 3-2666 can also be used. This method, when sticking the surface decorative sheet to the columnar body,
By using a pressing roller on each side surface of the columnar body, the surface decorative sheet is sequentially attached to each side surface. For example,
In the case of sticking to a square pole, the sheet is sequentially stuck to the upper side surface, the left and right side surfaces, and the lower side surface on the four side surfaces.
By lapping the adhesive layer side of the surface decorative sheet toward the substrate, the sheet is sequentially attached to each side surface, and the adhesive layer is activated by heating or the like to be bonded. In the case of applying the makeup on the surface decorative sheet with the base sheet attached, the base sheet is peeled off after the adhesion.

Jitsukodai 15-31122, Japanese Patent Publication Sho 5
As shown in FIG. 2 disclosed in Japanese Unexamined Patent Publication No. 6-7866, the surface decorative sheet 31 may be attached to the flat substrate 5 using the adhesive layer 4, and then V-cut processing may be performed. At this time, the surface decorative sheet 31 is attached to the flat substrate 5.
Are laminated by providing an adhesive layer 4, and the adhesive layers 4 are laminated as shown in FIGS.
As shown in FIG.
Then, the cutting portion 56 is joined to perform V-cut processing as shown in FIG. 3 (b), and the base material sheet “A” 1 is peeled and removed as shown in FIG. 3 (c). is there.

[0024]

In the surface decorative sheet of the present invention constructed as described above, the base sheets "A" and "B" have the desired surface shape (perfect mirror surface, matte, fine uneven pattern, pattern) on the surface of the decorative sheet. ) Is formed, a uniform thin film of ionizing radiation curable resin is formed, and short fibers dispersed in the sheet are prevented from protruding from the surface of the coating film.
In addition, the short fibers contained in the surface decorative sheet prevent cracking and breaking of the layer when tensile stress or bending moment is applied, have excellent bending workability, and have three-dimensional cross-linking hardening. It has the surface gloss, smoothness, heat resistance, solvent resistance, and scratch resistance peculiar to the ionizing radiation curable resin.

[0025]

EXAMPLES Examples will be described with reference to the drawings. A thickness 2 to be a base sheet “B” 2 in FIG.
Trifunctional urethane acrylate ppolymer (made by Dainichiseika Kogyo Co., Ltd.) in which 5 μm of Lumirror X-45 (biaxially stretched polyethylene terephthalate film) manufactured by Toray Industries, Inc. is mixed with 40% of glass fiber of 1 μm in diameter and 10 μm in length. ) The UV curable resin composition is applied by reverse roll coating with a thickness of 50 μm to provide an ionizing radiation curable resin layer 3, and as shown in FIG. 1 (b), a substrate sheet “A” 1 having a thickness of 25 μm Toray Co., Ltd. Lumirror X-45 was laminated and irradiated with ultraviolet rays from a high pressure mercury lamp to crosslink and cure the resin composition, and as shown in FIG. 1 (c), a base sheet “B” 2 Was peeled off to obtain a surface decorative sheet 31.
Then, a 10 mm-thick wood plywood substrate 5 is coated with an adhesive consisting of a vinyl acetate emulsion at 10 g / m ² (solid content) to form an adhesive layer 4, and the above-mentioned base sheet “A” 1 The surface decorative sheet 31 in the state of being attached was laminated. Then, as shown in FIG. 3 (a), a V-shaped groove cutting portion 56 is provided on the base 5, and an adhesive 41 made of vinyl acetate emulsion is provided on the cutting portion to perform the V-cut processing shown in FIG. 3 (b). Then, the adhesive 41 was bonded. Furthermore, FIG.
As shown in (c), the base sheet “A” 1 is peeled off and removed,
Completed V-cut processing. This product had excellent surface properties with no cracks in the bent portion and a glossy coating feeling.

[0026]

[Effect] Since the present invention is configured as described above, it has the following effects. That is, a V-cut process that is a bending process after being adhered to a base plate,
Bending or lapping that allows a surface decorative sheet to be attached while bending into an uneven body, cracks even in vacuum pressing,
A surface decorative sheet capable of handling without breakage was obtained. Since this surface decorative sheet is cured by sandwiching a liquid ionizing radiation curable resin between base materials sheets having gloss or an uneven pattern on the surface, short fibers contained in the resin are prevented from protruding to the surface. A surface decorative sheet was obtained which was excellent in not only the desired surface shape but also gloss, smoothness, heat resistance, scratch resistance, solvent resistance and the like. Further, since the surface decorative sheet of the present invention cured on a smooth surface is to be adhered to the uneven base,
The process of forming the protective film can be simplified, and a uniform surface can be formed without unevenness in the thickness of the coating film or absorption which is observed when directly coating the uneven surface.

[Brief description of drawings]

FIG. 1 (a) is a schematic cross-sectional view of a substrate sheet provided with an ionizing radiation-curable resin layer. (b) A schematic cross-sectional view showing a step of sandwiching and hardening the base sheet. (c) A schematic cross-sectional view showing the step of forming a surface decorative sheet and peeling the base sheet.

FIG. 2 is a schematic cross-sectional view of a surface decorative sheet attached to a substrate.

3 (a) to (b) to (c) are schematic cross-sectional views showing steps of V-cut processing.

FIG. 4 (a)-(b) are schematic cross-sectional views showing a step of providing a pattern layer on the surface decorative sheet.

FIG. 5 is a schematic cross-sectional view showing a step of producing a surface decorative sheet using the surface of a cylinder.

[Explanation of symbols]

 1 Base Material Sheet A 2 Base Material Sheet B 26 Cylinder 3 Ionizing Radiation Curable Resin Layer 30 Ionizing Radiation Curable Resin Composition 31, 32 Surface Decorative Sheet 4 Adhesive Layer 41 Adhesive Layer B 5 Base 56 V-shaped Groove Cutting part 6 Ionizing radiation irradiation part 7 Design layer 8 Discharge nozzle

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location B32B 31/28 9349-4F 33/00 C08J 5/18 CER

Claims (4)

[Claims] 1. A surface decorative sheet characterized in that short fibers of glass or a thermoplastic resin are dispersed in a three-dimensional crosslinked coating film of an ionizing radiation curable resin layer. 2. The surface decorative sheet according to claim 1, wherein one or both surfaces of the coating film has a pattern layer or an uneven pattern. 3. An ionizing radiation curable resin composition in which glass or thermoplastic resin short fibers are dispersed is sandwiched between two base sheets and pressed, and then either one of the sheets or both of them is pressed. The method for producing a surface decorative sheet according to claim 1 or 2, wherein the base sheet is peeled off and removed after the surface of the sheet is irradiated with ionizing radiation to crosslink and cure. 4. A liquid in which a cylinder having a desired surface shape is rotated around an axis and a base material sheet is supplied at a speed synchronized with the surface speed of the cylinder to disperse glass or thermoplastic resin short fibers. With the ionizing radiation-curable resin composition interposed therebetween, the substrate sheet is pressed against the cylindrical surface, and then the composition is ionized from the substrate sheet side, the cylindrical side, or both sides. After being crosslinked and cured by irradiating the substrate, the substrate sheet and the crosslinked coating film of the ionizing radiation-curable resin composition are peeled off from the cylindrical surface, and then the substrate sheet is peeled off. The method for producing a surface decorative sheet according to claim 1 or 2.