JP2002240078A - Method for simultaneous injection molding with decoration - Google Patents

Abstract

PROBLEM TO BE SOLVED: To add a feel of unevenness, solidity, a feel of depth, etc., which are durable without adding a process by simultaneous injection molding with decoration. SOLUTION: The simultaneous injection molding with decoration is applied to the surface of a base material sheet 2 of a thermoplastic resin, by using a decorative sheet S in which a resin pattern layer 2 is formed partially by a cured ionizing radiation curable resin. A design is improved by forming an uneven pattern on the surface of the resin pattern layer. In the resin pattern layer, a part or the whole of the thickness may be embedded in the base material sheet. A decorative layer 3 may be formed on the back of the base material sheet to improve the design, or an adhesive layer 4 may be formed to improve adhesion to a resin molding.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simultaneous decoration method for injection molding using a laminate type decorative sheet.

[0002]

2. Description of the Related Art Conventionally, decorative molded products obtained by decorating the surface of a resin molded product have been used for various purposes. For example,
(1) The molded product obtained by injection molding can be further spray-painted with a two-head spray gun to apply a paint with a pattern on the surface, but a pattern with a fixed shape cannot be formed.
(2) Alternatively, if the picture is hand-painted using a brush or brush, the above-mentioned problem (1) can be solved and a desired pattern can be obtained, but the manufacturing cost and the processing time are further increased, and it is not suitable for mass production. In addition, in (1) and (2), further steps are required in addition to the injection molding step, and the cost is high. In addition, the pattern to be provided later is flat, and the feeling of irregularities (texture), three-dimensional feeling, depth feeling, and the like are poor. . Therefore, in order to improve such a drawback, in the simultaneous injection molding decorating method disclosed in Japanese Patent Publication No. 50-19132, etc., a decorative sheet is inserted into both male and female molds of injection molding, and this is molded by resin molding. Decorate the surface of the molded article by integrating it with the object. Thus, a desired pattern can be mass-produced with good reproducibility, and further, there is no need to add a further step to the injection molding step.

However, at this time, a pattern usually formed on the decorative sheet is formed as a planar pattern by gravure printing or the like using a thermoplastic resin such as an acrylic resin as a binder resin. Moreover, in order to increase the durability (abrasion resistance, etc.) of the pattern, the pattern is printed on the back side (resin molding side) of the base sheet, and as a result, the base sheet itself is exposed on the surface of the decorative molded product The configuration is as follows.

[0004]

Therefore, the surface of the decorative molded article has a flat and uniform glossy appearance, and the design feeling of the molded article having irregularities cannot be obtained as it is. Therefore, in order to give the surface of the molded product an unevenness, a three-dimensional effect, and a sense of depth, a pattern is printed on the back surface of the base material sheet, and the surface side is embossed (embossed) to give surface irregularities, or a vinyl chloride resin Attempts have also been made to apply stencil printing (printing with a high coating amount of ink) using a sol or the like to the surface of the substrate sheet. However, in the case of surface irregularities due to embossing, the surface irregularities have been restored to a flat surface by the action of heat and stress during injection molding or preliminary molding (vacuum molding) prior thereto. In addition, in the case of the overlay printing, the overlay printing was crushed by the pressure of the injection (or preliminary) molded product. The surface irregularities obtained by embossing or sol-printing the substrate sheet were easily lost or damaged by abrasion because of the irregularities caused by the thermoplastic resin in each case.

[0005] That is, an object of the present invention is to solve the above-mentioned problems, and it is possible to provide a durable and hard-to-disappear, unevenness, three-dimensional feeling, depth feeling and the like without increasing the number of steps. Another object of the present invention is to provide an injection molding simultaneous decorating method capable of obtaining a decorative molded product having good pattern durability.

[0006]

Therefore, in order to solve the above-mentioned problems, the simultaneous injection molding and decorating method of the present invention uses a method in which a cured product of an ionizing radiation-curable resin is applied to the surface of a base sheet made of a thermoplastic resin. A decorative sheet having a resin pattern layer formed in part is prepared, and the decorative sheet is made so that the resin pattern layer side faces the female mold side, so that a female mold and a male mold of an injection molding machine are formed. Insert the mold between the molds, then clamp both molds, inject and fill the resin in the fluid state into the cavity formed by both molds, then solidify the resin to form a resin molded product, and mold the resin The decorative sheet was bonded and integrated with the surface of the product to form a decorative molded product.

[0007] By adopting the above-described method, the unevenness expressing the unevenness, the three-dimensional effect, the depth, and the like is given as the actual surface unevenness at the stage of the decorative sheet, and the surface unevenness is thermoplastic. It is not a resin but a curable resin, which has excellent durability that does not easily disappear or be damaged by abrasion due to the unevenness due to the partially patterned resin pattern layer made of ionizing radiation curable resin. . In addition, since the resin pattern layer is partially formed, even if a decorative sheet using a resin that does not easily expand into the resin of the resin pattern layer and has insufficient moldability is used, the entire decorative sheet is used. The decorative sheet can be molded and used without significantly lowering the moldability. In addition, if a decorative sheet having a pattern provided on the back side of the base sheet is used, the pattern is protected by the base sheet and the resin pattern layer, so that the durability of the pattern can be improved. As a result, after the injection molding step, there is no need to provide surface irregularities in a subsequent step, and without increasing the number of steps, it is possible to impart durability, a sense of depth, a sense of depth, a sense of depth, and the like, which is durable and difficult to disappear, and Even when a pattern is provided, since it is provided in advance on the back surface side of the base sheet of the decorative sheet, it is an injection molding simultaneous decorating method that can obtain a decorative molded article having good durability.

Alternatively, the simultaneous injection molding and decorating method of the present invention provides a resin pattern layer formed of a cured product of an ionizing radiation-curable resin and partially formed on a surface of a base sheet made of a thermoplastic resin. A decorative sheet having a decorative sheet having a concave-convex pattern on the surface of the resin pattern layer, so that the decorative sheet is such that the resin pattern layer side faces the female mold side,
Insert between the female mold and the male mold of the injection molding machine, then clamp both molds, inject and fill the resin in the flow state into the cavity formed by both molds, then solidify the resin And a decorative molded article by bonding and integrating the decorative sheet on the surface of the resin molded article to form a decorative molded article.

In the case of the above method, the same operation and effect as described in the above method can be obtained, and in addition, as one type of surface unevenness, the decorative pattern sheet has an uneven pattern on the surface of the resin pattern layer itself. For this purpose, depending on the presence or absence of the resin pattern layer, a gloss mat pattern composed of a glossy portion (the portion where the resin pattern layer is not formed) and a glossless portion (the portion where the resin pattern layer is formed) may be provided to the decorative molded product. it can.

In addition, the injection molding simultaneous decorating method of the present invention comprises:
In any of the above methods, the decorative sheet to be prepared,
A decorative sheet having a resin pattern layer made of a cured product of an ionizing radiation-curable resin and partially formed on a surface of a base sheet made of a thermoplastic resin, wherein the resin pattern layer has a thickness of one part. A decorative sheet having a configuration in which part or all of the sheet is buried in the base sheet.

By employing such a method, a design is obtained in which a resin pattern layer having different gloss, color tone, etc. is partially buried in a base sheet on a flat surface as a whole. ,
This is a method for simultaneous decoration by injection molding, which has a three-dimensional feeling, depth feeling and the like, and is excellent in abrasion resistance of the resin pattern layer, and provides a decorative molded article having high design and excellent durability.

Further, the injection molding simultaneous decorating method of the present invention comprises:
In any one of the above methods, a decorative sheet obtained by further performing a decoration process on the base sheet is used as the decorative sheet. By doing so, the decorative molded article can be further designed.

[0013] In addition, the injection molding simultaneous decorating method of the present invention comprises:
In any one of the above methods, a decorative sheet having an adhesive layer formed on the lowermost surface is used as the decorative sheet. By doing so, the adhesion between the decorative sheet and the resin molded product can be reliably imparted to the decorative molded product.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

Decorative sheet: First, the decorative sheet will be described.

[Overview] FIG. 1 is a plan view (FIG. 1A) and a cross-sectional view (FIG. 1B) illustrating an embodiment of the decorative sheet used in the present invention. FIG. 1A is a plan view of the decorative sheet S as viewed from the front side, in which a resin pattern layer 1 made of a cured product of an ionizing radiation-curable resin has a resin pattern layer 1 made of a thermoplastic resin. Fig. 3 illustrates a state where the side surface is partially formed. Further, in the decorative sheet shown in the figure, a decorative layer 3 for expressing a pattern or the like is partially formed on the back side of the base sheet 2 in a pattern. When the base sheet is transparent, the decorative layer 3 can be seen through the base sheet. In the figure, the shape of the resin pattern layer 1 in plan view is all square and a plurality of shapes are drawn, but of course, other shapes may be used, and the resin pattern layer is separated from the decorative sheet in terms of formability. It is preferable to form them independently, but they may be formed partially but may be continuous without being separated and independent.
In the sectional view of FIG. 1B, the decorative sheet S has a resin pattern layer 1 made of a cured product of an ionizing radiation-curable resin.
On the back side of the base sheet 2, a part is formed from the base sheet 2 side as a decoration layer 3 for a picture expression or the like as a further decoration process. This is a configuration example in which the formed pattern layer 3A and the entire solid layer 3B formed on the entire surface are formed, and the adhesive layer 4 is further formed in this order. The mode in which the decorative layer 3 is also provided is a preferable mode in that the decorative molded product can be designed with a higher design.
Is also a preferred form in that the adhesion between the decorative sheet and the resin molded product can be more reliably achieved. The decorative layer 3 may be on the front side of the base sheet 2, but if it is on the back side as shown in the figure, the durability will be excellent.

[Resin Pattern Layer] The resin pattern layer 1 is partially formed on the front and side surfaces of the base sheet 2 as a cured product of an ionizing radiation-curable resin. As the ionizing radiation-curable resin to be used, a resin curable by ionizing radiation such as ultraviolet rays or electron beams may be used according to the application.

That is, the ionizing radiation-curable resin is:
A composition curable by ionizing radiation, specifically, a prepolymer (including a so-called oligomer) and / or a monomer having a radically polymerizable unsaturated bond or a cationically polymerizable functional group in a molecule. A composition curable by mixed ionizing radiation is preferably used.
These prepolymers or monomers are used alone or as a mixture of two or more. Curing is usually cross-linking, and cross-linking is preferable from the viewpoint of durability such as abrasion resistance.

The above-mentioned prepolymer or monomer specifically has a radical polymerizable unsaturated group such as a (meth) acryloyl group and a (meth) acryloyloxy group, a cationic polymerizable functional group such as an epoxy group in the molecule. Consisting of a compound having Further, a polyene / thiol prepolymer based on a combination of polyene and polythiol is also preferably used. In addition, for example, a (meth) acryloyl group is
It means an acryloyl group or a methacryloyl group. Examples of the prepolymer having a radical polymerizable unsaturated group include polyester (meth) acrylate, urethane (meth) acrylate, epoxy (meth) acrylate, melamine (meth) acrylate, triazine (meth) acrylate, and silicone (meth) acrylate. Etc. can be used. A molecular weight of about 250 to 100,000 is usually used.

Examples of the monomer having a radical polymerizable unsaturated group include monofunctional monomers such as methyl (meth)
There are acrylate, 2-ethylhexyl (meth) acrylate, phenoxyethyl (meth) acrylate and the like.
Also, as polyfunctional monomers, diethylene glycol di (meth) acrylate, propylene glycol di (meth) acrylate, trimethylpropane tri (meth)
There are also acrylate, trimethylolpropane ethylene oxide tri (meth) acrylate, dipentaerythritol tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate and the like. Examples of prepolymers having a cationically polymerizable functional group include prepolymers of epoxy resins such as bisphenol epoxy resins and novolak epoxy compounds, and vinyl ether resins such as fatty acid vinyl ethers and aromatic vinyl ethers. Examples of the thiol include polythiols such as trimethylolpropane trithioglycolate and pentaerythritol tetrathioglycolate. Examples of the polyene include those obtained by adding allyl alcohol to both ends of a polyurethane made of a diol and a diisocyanate.

In the case of curing with ultraviolet light or visible light, a photopolymerization initiator is further added to the ionizing radiation-curable resin. In the case of a resin system having a radical polymerizable unsaturated group, acetophenones, benzophenones, thioxanthones, benzoin, benzoin methyl ethers can be used alone or in combination as a photopolymerization initiator. In the case of a resin system having a cationically polymerizable functional group, an aromatic diazonium salt, an aromatic sulfonium salt, an aromatic iodonium salt, a metallocene compound, a benzoinsulfonic acid ester, or the like is used alone or as a mixture as a photopolymerization initiator. be able to. In addition,
The addition amount of these photopolymerization initiators is about 0.1 to 10 parts by mass with respect to 100 parts by mass of the ionizing radiation-curable resin.

If necessary, a thermoplastic resin such as a vinyl chloride-vinyl acetate copolymer, polyvinyl acetate, an acrylic resin, or a cellulose resin may be added to the ionizing radiation-curable resin. it can. Further, various additives can be further added to the ionizing radiation-curable resin, if necessary. Examples of these additives include extenders (fillers) made of fine powders such as calcium carbonate, barium sulfate, silica, and alumina.

As the ionizing radiation, electromagnetic waves or charged particles having energy capable of causing a curing reaction of the molecules in the ionizing radiation-curable resin (composition) are used. What is usually used is ultraviolet rays or electron beams.
It is also possible to use visible light, X-rays, ion beams and the like.
As the ultraviolet light source, a light source such as an ultra-high pressure mercury lamp, a high pressure mercury lamp, a low pressure mercury lamp, a carbon arc lamp, a black light, and a metal halide lamp is used. As a wavelength of the ultraviolet light, a wavelength range of 190 to 380 nm is usually mainly used. As the electron beam source, various types of electron beam accelerators such as Cockcroft-Walton type, Van degraft type, resonance transformer type, insulating core transformer type, or linear type, dynamitron type, high frequency type, etc. are used, preferably 100 to 1000 keV, preferably. A device that irradiates electrons having an energy of 100 to 300 keV is used.

The resin pattern layer is formed using a liquid composition containing an ionizing radiation-curable resin as described above, using silk screen printing, gravure embossing printing, or a printing or coating method such as a molding plate cylinder method described later. By a known forming method such as
It can be formed on a substrate sheet.

The pattern of the resin pattern layer may be a polygon, a line drawing,
One or two or more of geometrical patterns such as polka dots, stripes, and lattices, letters, wood patterns, stone patterns, tiled patterns, brick laminated patterns, cloth patterns, and leather patterns are used according to the application.

As in the decorative sheet S illustrated in the cross-sectional view of FIG. 2, the resin pattern layer 1 may be provided with an uneven pattern 5 with the surface of the layer itself being an uneven surface. As the uneven pattern,
For example, there are a grain of sand, a satin finish, a hairline, a line, a cloth texture (texture), and a skin squeezing. If such a pattern is a random pattern such as grain or pear, a matting agent is added to the resin pattern layer, or hair lines, lines, cloth, etc. Texture (texture),
If the pattern has regularity such as squeezing, it can be formed by the molding plate cylinder method described later. As the matting agent, for example, particles composed of inorganic substances such as silica, alumina, calcium carbonate, aluminosilicate, barium sulfate, and organic polymers such as polyethylene, urethane resin, polycarbonate, and polyamide (nylon) are used. Can be The average particle size of the particles is about 1 to 10 μm, and the amount added is 5 to
It is about 30% by mass. The shape of the particles is a polyhedron,
Spherical, scale-like, etc.

The thickness of the resin pattern layer is not particularly limited, but is usually about 1 to 200 μm. In particular, when the unevenness and the three-dimensional effect are visually emphasized, it is preferable that the thickness be 10 μm or more. Further, the area ratio (area ratio) of the partially formed resin pattern layer in the entire area of the decorative sheet is preferably 50% or less from the viewpoint of preventing cracking during molding of the decorative sheet.

Further, the resin pattern layer may be buried in the base material sheet at a part (see FIG. 5) or all of the thickness (see FIG. 4B). The entire thickness of the resin pattern layer is buried in the substrate sheet, and the surface of the substrate sheet and the surface of the resin pattern layer (or the envelope surface thereof) are on the same plane to form the substrate sheet and the resin pattern layer. When the surface forms a continuous flat surface, the surface of the base material sheet and the surface of the resin pattern layer are surfaces having different surface unevenness, refractive index, gloss, color, or the like. Otherwise, the base sheet and the resin pattern layer cannot be distinguished from each other, and the design effect cannot be obtained (however, the surface durability is improved by the resin pattern layer made of a cured product of the ionizing radiation-curable resin). Physical effect is obtained).

In order to embed the resin pattern layer in the substrate sheet, for example, once the resin pattern layer is partially formed on the substrate sheet (to form a convex portion), then,
(1) The resin pattern layer is pressed into the base sheet by hot pressing, or (2) the mold temperature at the time of injection molding of the molding resin at the same time as the decoration molding is not embedded in the decorative sheet stage.・ Adjust the conditions such as temperature and pressure of the injection resin, injection time, etc., press-fit the resin pattern layer into the base sheet at the time of resin injection, and wear the decorative pattern product with the resin pattern layer embedded in the base sheet. Good. However, the point (2) is more preferable in that the pressure can be applied completely and with good reproducibility and that the injection molding process is not rate-determined. The embedding of the resin pattern layer in the base sheet is
In general, the base sheet is heated to a temperature not lower than its softening point (evaluated by vicat softening temperature or the like) and lower than the melting point (or melting temperature). (2) In the case of the above (2), the front and back surfaces are pressed by an injection mold and an injection resin.

Here, the above-described molding plate cylinder method will be described. In this method, the base sheet 2 is filled with an ionizing radiation-curable resin (an uncured product thereof) in the concave portion of the molding plate cylinder, and the resin sheet is brought into contact with the resin. After the resin is cured by irradiating it with ionizing radiation while being held in between, the base sheet is peeled from the molding plate cylinder, thereby forming a resin consisting of a cured product of the resin on the base sheet. The pattern layer is partially formed.

This method is disclosed in JP-A-57-87318, JP-B-57-22755, and JP-B-63-50.
No. 066, JP-A-7-32476, etc., which harden an ionizing radiation-curable resin by faithfully setting the uneven shape of a molding plate cylinder (also called a shaping plate, a roll intaglio, etc.). It is a method of shaping as a product. Basically, it comprises the following steps.

(1) A cylindrical molding plate cylinder having on its surface a concavo-convex shape having the same shape as the concavo-convex shape formed by the target resin pattern layer itself on the surface and the concavo-convex shape on the surface of the layer, and having the concavo-convex shape of the reverse concavo-convex shape. Prepare and rotate it around the axis. (2) The continuous belt-shaped base sheet is supplied at the same speed as the peripheral speed of the plate cylinder. (3) The base sheet and the plate cylinder are overlapped with each other via an uncured liquid composition of an ionizing radiation-curable resin between the base sheet and the plate cylinder, and the liquid composition completely covers at least the concave portion of the plate cylinder. Fill. (4) Irradiating with ionizing radiation in that state to cure the liquid composition. (5) Thereafter, the base sheet is peeled and removed together with the cured product (resin pattern layer) of the ionizing radiation-curable resin in which the irregularities on the molding plate cylinder are adhered to the base sheet.

In the above method, the molding plate cylinder which becomes a cylindrical molding die is basically made of the same material, the same structure, and the same manufacturing method as those of the known intaglio, gravure and embossing plates. Anything may be used. As a material of the plate, usually, a metal such as iron or copper is used. However, when irradiating ultraviolet light or visible light from inside the plate cylinder, a transparent material such as glass or quartz is used.

The rotary driving of the molding plate cylinder about its axis may be performed by using the same mechanism and method as those of an ordinary transfer type gravure printing machine, rotary embossing machine, or the like. In order to adhere the base sheet to the molding plate cylinder, pressure is applied by a roller (pressing roller) made of rubber, metal, or the like. Also, when the base sheet is peeled from the molding plate cylinder, the base sheet is peeled by pressing with a roller (peeling roller) made of rubber, metal or the like. As the base sheet, a continuous band-shaped sheet is used. Such a base sheet is unwound from an unwinding roll (supply roll) and, after shaping, is wound up by a take-up roll (paper discharge roll).

There are the following (1) to (3) as modes in which the base sheet and the molding plate cylinder are superposed and adhered to each other with an uncured liquid composition of an ionizing radiation-curable resin therebetween. (1) First, a liquid composition is applied on a substrate sheet, and then the substrate sheet is overlaid on the plate cylinder such that the application surface faces the surface of the molding plate cylinder. (2) First, the liquid composition is applied to the plate cylinder, and then the base sheet is superimposed on the application surface on the plate cylinder. (3) First, the liquid composition is applied on each of the forming plate cylinder and the base sheet, and then the base sheet and the plate cylinder are overlapped with each other with the application surfaces facing each other.

There are the following modes (A) and (B) for irradiating the uncured liquid composition between the molding plate cylinder and the substrate sheet with ionizing radiation. (A) Irradiation from the substrate sheet side which is transparent to ionizing radiation. (B) A plate cylinder transparent to ionizing radiation is selected (for example, a quartz plate cylinder is selected for ultraviolet rays), and irradiation is performed from the inside of the plate cylinder.

FIG. 4 is a conceptual diagram showing a method according to the above (1) and the above (A). In the method shown in the figure, the continuous belt-shaped base sheet 2 is unwound from an unwinding roll 100 through a pair of feed nip rollers 110,
By 0, it is supplied to the plate cylinder 130. On the other hand, an uncured resin liquid (uncured liquid composition) 150 of an ionizing radiation-curable resin is applied to the plate surface of the molding plate cylinder 130 by a T-die type ejection nozzle 140 with the ejection port facing upward. Excess uncured resin liquid 15 protruding from recess 131 on the plate surface
0 is scraped off by the doctor blade 160. Thereafter, the base sheet 2 described above is supplied so as to be pressed against the plate surface of the forming plate cylinder 130 by the pressing roller 120. Then, ionizing radiation 171 is irradiated through the base sheet 2 from the ionizing radiation irradiator 170 installed around the plate surface of the molding plate cylinder 130, and the uncured resin liquid 150 is cured to form a resin pattern layer as a cured product. 1 is formed on a base sheet 2. Then, after the uncured resin liquid 150 is cured on the plate surface to form the resin pattern layer 1, the base sheet 2 is peeled off from the molding plate cylinder 130 by the peeling roller 180, and the base sheet 2 and the base material A laminated sheet L having a configuration including the resin pattern layer 1 formed of a cured product of the ionizing radiation-curable resin partially formed on the surface of the sheet 2 is obtained. The laminated sheet L can be used as a decorative sheet as it is. However, if necessary, a decorative layer, an adhesive layer, and the like are further provided to form a decorative sheet to be used.
Further, at the stage of the base sheet 2 to be supplied to the molding plate cylinder, a base sheet on which the decorative layer and the like are formed in advance can be used.

[Base Sheet] As the base sheet 2, a resin sheet made of a thermoplastic resin is used. The reason why a thermoplastic resin is used for the base sheet is that when a decorative sheet is formed and used, moldability is easily obtained. As the thermoplastic resin used for the base sheet, acrylic resin, vinyl chloride resin, ABS resin (acrylonitrile-styrene-butadiene copolymer), styrene resin, polycarbonate resin, or polyester resin such as polyethylene terephthalate and moldable polyester resin Or
Polyethylene, polypropylene, polymethylpentene,
Polyolefin resins such as polybutene, ethylene-propylene copolymer, propylene-butene copolymer, and olefin thermoplastic elastomer can be used.

Although it depends on the physical properties required for the decorative molded product,
Since the base material sheet takes charge of the physical properties of the portion where the resin pattern layer is not formed, an acrylic resin, a moldable polyester resin or the like is preferable.

The acrylic resin includes, for example, polymethyl (meth) acrylate, polybutyl (meth) acrylate, methyl (meth) acrylate-butyl (meth) acrylate copolymer, methyl (meth) acrylate-styrene copolymer and the like. (However, (meth) acrylate means acrylate or methacrylate) alone or as a mixture of two or more.

As the moldable polyester resin,
Polyester-based thermoplastic elastomers, amorphous polyesters and the like can be used. Examples of the polyester-based thermoplastic elastomer include a high-crystalline high-melting-point aromatic polyester in the hard segment and a block polymer using an amorphous polyether having a glass transition temperature of -70 ° C or lower in the soft segment. For example, polybutylene terephthalate is used for the high crystalline, high melting point aromatic polyester, and polytetramethylene glycol is used for the amorphous polyether. In addition, typical examples of the amorphous polyester include an ethylene glycol-1,4-cyclohexanedimethanol-terephthalic acid copolymer.

The formability of the decorative sheet used in the present invention is not always essential. For example, in the case of performing the injection molding simultaneous decoration of the present invention by a so-called insert molding method in which a (non-molded) decorative sheet is attached to an injection mold surface and injection molding is performed, the decorative sheet is not stretched. That is, there is also a mode of using without molding. Therefore, the base sheet of the decorative sheet in such a case may not have moldability. In the case of using such an insert molding method, the thickness of the base sheet of the decorative sheet does not need to be suppressed because of moldability, and from the viewpoint of adhesiveness with the injection resin, the injection resin side (that is, On the back side), it is also possible to use a laminate in which sheets of about 0.1 to 0.5 mm such as ABS resin and polypropylene resin are bonded according to the injection resin.

As the base sheet, for example, a single-layer or multi-layer resin sheet made of the above-mentioned resin is used. Also,
In the base sheet, if necessary, various additives such as stabilizers, plasticizers, coloring agents, ultraviolet absorbers, hindered amine light stabilizers, extenders, etc. may be added for physical property adjustment. good. When the base sheet is colored, it is transparent,
It may be opaque, but if a decorative layer is provided on the back side of the base sheet, it should be transparent enough to make it visible. For coloring, for example, known coloring agents listed in a decorative layer described later can be used.

The thickness of the base sheet is usually preferably about 50 to 300 μm (total thickness in the case of a multilayer) from the viewpoints of cost, required performance for the decorative molded product, suitability for forming the decorative sheet, and the like. Is not particularly limited.

Further, on the front surface, the back surface, or both the front and back surfaces of the base sheet, corona discharge treatment, plasma treatment, urethane resin, etc. may be used as necessary to improve adhesion to other layers in contact with the base sheet. A known easy adhesion treatment such as formation of a primer layer may be performed.

[Decoration Layer] The decoration layer 3 is provided as needed. The decorative layer 3 is a layer that typically represents a pattern such as a pattern or a character. The pattern is arbitrary, for example,
Wood grain, stone grain, cloth grain, sand grain, squeezed pattern, tiled pattern, brickwork pattern, geometric pattern, letters, symbols, solid solids, etc., are used alone or in combination of two or more according to the application. You. The decorative layer may be formed by a conventionally known forming method and material such as a printing method such as gravure printing, silk screen printing, and offset printing. Further, a metal thin film layer or the like in which a metal such as aluminum, chromium or the like is partially or entirely formed by a known vapor deposition method or the like is also used as the decorative layer.

The ink for forming the decorative layer is composed of a vehicle comprising a binder and the like, a coloring agent such as a pigment and a dye, and various additives appropriately added thereto. A single resin selected from a vinyl-vinyl acetate copolymer, a polyester resin, a cellulose resin, a chlorinated polypropylene, a urethane resin, a polyamide resin, or the like, or a mixed resin of two or more types is used. Examples of the colorant include inorganic pigments such as titanium white, zinc white, carbon black, iron black, red iron oxide, chrome vermillion, cadmium red, ultramarine, cobalt blue, graphite, titanium yellow, phthalocyanine blue, and indus Organic pigments (including dyes) such as renblue, isoindolinone yellow, benzidine yellow, quinacridone red, polyazo red and perylene red; or metal pigments composed of flaky foil powder such as aluminum and brass; mica coated with titanium dioxide A pearlescent (pearl) pigment made of a scale-like foil powder such as basic lead carbonate is used.

The decorative layer may be a layer for imparting a function such as a conductor layer or a magnetic layer, in addition to a layer for expressing a pattern such as a wood grain pattern. That is, the decoration processing in the present invention also includes functionalization. For example, in the conductor layer, a conductive powder such as silver powder is dispersed in the binder resin instead of the coloring agent. In the case of a magnetic layer, a magnetic powder composed of iron oxide or the like is dispersed in the binder resin instead of the coloring agent. Further, as the pattern of the decorative layer, as a pattern pattern that is not visible, for example, a pattern printed with a fluorescent ink that is transparent to visible light and emits fluorescence by ultraviolet irradiation, a bar code printed with an infrared absorbing ink, or the like. good.

[Adhesive Layer] The back side of the decorative sheet may be subjected to an easy adhesion treatment such as corona discharge treatment, plasma treatment, primer coating, etc., if necessary, in order to improve the adhesion to the resin molded product. However, the adhesive layer 4 may be further provided after or without performing the easy adhesion treatment. As the adhesive layer 4, for example, a known resin such as a thermoplastic resin or a thermosetting resin is used as a heat-sensitive adhesive according to a resin material of a resin molded product to be an adherend of the decorative sheet. .
In the thermoplastic resin, for example, acrylic resin, acrylic-modified polyolefin-based resin, chlorinated polyolefin resin,
One or a mixture of two or more of a vinyl chloride-vinyl acetate copolymer, a thermoplastic urethane resin, a thermoplastic polyester resin, a polyamide resin, a rubber-based resin, and the like are used. As the thermosetting resin, a urethane resin, an epoxy resin, or the like is used. Here, as the acrylic-modified polyolefin-based resin, for example, a main chain (trunk) of a polyolefin structure such as polyethylene, polypropylene, and polybutene
Examples thereof include those obtained by graft-polymerizing side chains (branches) of monomers or prepolymers of alkyl (meth) acrylates such as methyl (meth) acrylate and butyl (meth) acrylate. Specifically, for example, Japanese Patent Laid-Open No. 3-1
The one disclosed in 39542 is used. And when the resin of the resin molded product is, for example, a polyolefin-based resin, an acrylic-modified polyolefin-based resin, a chlorinated polyolefin resin, or the like is preferable, and the former acrylic-modified polyolefin-based resin is more preferable in terms of heat resistance. . In addition, in order to adjust and improve various physical properties such as printing (or coating) suitability in the adhesive layer, various known additives such as extender pigments and storage stabilizers may be appropriately added as necessary. It may be added. In addition, the adhesive layer is formed by using a known printing or coating method such as gravure printing, roll coating, or the like, made of the above resin or the like. The thickness of the adhesive layer is not particularly limited, but is usually about 1 to 100 μm.

Lamination of decorative sheets (simultaneous decoration by injection molding):
And in the simultaneous injection molding decorating method of the present invention, by using the above-described decorative sheet, utilizing a so-called simultaneous injection molding decorating method, by laminating the decorative sheet on the surface of the resin molded product,
This is a method of obtaining a decorative molded product in which the decorative sheet is laminated and integrated with the surface of the resin molded product with the resin pattern layer facing the front. Then, the so-called simultaneous injection molding decorating method as the decorating sheet laminating method in the present invention will be further described.

The so-called simultaneous injection molding decoration method is disclosed in
As described in Japanese Patent Publication No. 0-19132, Japanese Patent Publication No. 43-27488, etc., after inserting the decorative sheet between the male and female molds, the molds are clamped, and the mold is inserted into the cavity formed by the molds. This is a method in which a resin in a fluid state is injected and solidified, and at the same time as a resin molded product is formed, a decorative sheet is laminated and integrated on the surface to obtain a decorative molded product.

The injection molding simultaneous decorating method of the present invention can take various forms in a conventionally known so-called injection molding simultaneous decorating method, except that the above-described decorative sheet is used as the decorative sheet to be used. is there. For example, basically, either a mode in which the decorative sheet is preformed or a mode in which the decorative sheet is not preformed, may be used. Further, the decorative sheet may or may not be preheated. Note that the decorative sheet is usually preheated at the time of preforming. In addition, the decorative sheet may be laminated on the resin molded product in a molded state, or may be laminated on the resin molded product without being molded at all.

Of course, when the decorative sheet has a large drawing, it is preferable to perform preforming. On the other hand, when the decorative sheet is not narrowed down, the decorative sheet may be formed by the resin pressure of the resin in the flowing state to be injected. At this time, if the drawing is shallow, the decorative sheet may be formed only by the resin pressure of the resin in the flowing state to be filled in the mold at the same time as the resin injection without preforming. Further, even when the decorative sheet is formed by resin pressure, the decorative sheet may utilize the heat of the injection resin without preheating. In addition, the pre-molding of the decorative sheet is usually performed by using the injection mold as a vacuum mold, but before supplying the decorative sheet between the molds, a separate vacuum mold is used outside the injection mold. Preforming such as vacuum forming of the decorative sheet (offline preforming) may be used. However, the preforming is preferably performed by using both the injection molding die and the vacuum molding die in that the decorative sheet can be efficiently and accurately laminated. However, in the case where the preformed decorative sheets are collectively manufactured in another place in advance, the preforming is preferably in the form of off-line preforming. In the description of the present invention, vacuum forming includes vacuum pressure forming.

FIG. 7 is a conceptual view for explaining the simultaneous injection molding and decorating method in one embodiment. In the embodiment shown in FIG. 7, before the mold is clamped, the decorative sheet is heated and softened between the molds, preliminarily molded by vacuum molding with an injection molding die, and then the resin is injected by clamping. Then, referring to FIG.
The injection molding simultaneous decoration method will be described more specifically. Also,
This form is more preferable when the decorative sheet is deeply drawn out of the various combinations of the preforming and preheating of the decorative sheet described above. It should be noted that the decorative sheet used in the simultaneous injection molding decorative method of the present invention may be either a single sheet or a continuous strip.

First, as shown in FIG. 7A, as an injection mold, a mold (male mold) Ma having a runner (runner) and a gate (gate) communicating with the injection nozzle, and a suction hole 41 in the cavity surface. And a pair of molds (female molds) Mb that also serve as a preforming mold for the sheet. These molds are made of metal such as iron or ceramics. In the mold open state, the decorative sheet S is supplied between the two molds Ma and Mb, and the decorative sheet S is fixed to the mold Mb by pressing with a sheet clamp 42 having a frame shape in plan view. At this time, the base sheet side (relative to the resin pattern layer) of the decorative sheet naturally faces the injection resin side on the right side in the drawing. Next, the decorative sheet is appropriately heated and softened by a heater (not shown) inserted between both molds. The heating is, for example, non-contact radiation heating, but may be conduction heating by contact. Then, the decorative sheet is sucked through the suction hole and vacuum formed, and the decorative sheet is preformed along the cavity surface of the mold Mb. Next, the heater is retracted from between the two dies, the two dies are clamped as shown in FIG. 7B, and a cavity formed by the two dies is filled with a resin in a flowing state such as a heated and molten state. After the resin is solidified by cooling or the like, the mold is opened and the molded product is taken out. Then, if there is an unnecessary portion of the decorative sheet, trimming is appropriately performed to obtain a decorative molded product having a configuration in which the decorative sheet is laminated and integrated on the surface of the resin molded product.

FIG. 3 is a sectional view showing an example of a decorative molded article obtained by the simultaneous injection molding and decorating method of the present invention as described above. The decorative molded product P in the same figure is a decorative sheet S on the uneven surface of the resin molded product 6 in order from the resin molded product 6 side.
This is a molded article having a configuration in which an adhesive layer 4, a decorative layer 3, a base sheet 2 made of a thermoplastic resin, and a resin pattern layer 1 partially formed of a cured product of an ionizing radiation-curable resin are formed. . The decorative sheet S is, for example, a decorative sheet having a configuration as illustrated in FIGS. 1 and 2.

[Injection Resin] In the simultaneous injection molding decorating method of the present invention, the resin to be injection-molded, that is, the resin to be a resin molded product, is not particularly limited, and may be a known resin. What is necessary is just to select according to the required physical properties of a product, cost, etc. For example, if it is a thermoplastic resin, polyethylene, polypropylene, polybutene, polymethylpentene, ethylene-propylene copolymer, ethylene-propylene-butene copolymer, polyolefin-based resin such as olefin-based thermoplastic elastomer, or ABS resin ,
Styrene resin, acrylic resin, vinyl chloride resin, polycarbonate resin and the like. Also, if it is a curable resin,
It is a two-part curable resin, for example, an uncured resin liquid such as a urethane resin, an unsaturated polyester resin, or an epoxy resin. The thermoplastic resin is melted by heating and injected in a fluid state, and the curable resin (the uncured product) is injected in a flowing state at room temperature or appropriately heated.

As the injection resin, a resin colored by adding a coloring agent may be used according to the application. As the coloring agent, a known coloring agent as described above for the decorative layer may be used. In addition, the injection resin may contain, if necessary, various known additives such as silica, alumina, talc, calcium carbonate, inorganic powders such as aluminum hydroxide, fillers such as glass fibers, stabilizers, lubricants, and elastomers. To be included.

[0059]

The present invention will be described in more detail with reference to the following examples.

[Embodiment 1] First, FIGS. 1A and 1B
The decorative sheet S having the structure shown in the above was prepared and prepared as follows. As shown in FIGS. 1A and 1B, the back side of the base sheet 2 made of a non-colored transparent acrylic resin sheet having a thickness of 125 μm containing polymethyl methacrylate as a main component is successively subjected to gravure printing. The decorative layer 3 having a geometric pattern was formed by printing. As for the pattern, a pattern layer 3A of a square pattern and an entire solid layer 3B of a solid pattern were printed in this order. For a printing ink of a square pattern, a mixture of 6 parts by mass of an acrylic resin and 4 parts by mass of a vinyl chloride-vinyl acetate copolymer was used as a binder resin, and phthalocyanine blue, graphite, and carbon black were used as coloring agents. A coloring ink was used. For printing ink with a solid image on the entire surface,
The binder resin is the same as this, but the colorant is titanium white,
Colored ink using graphite and red iron oxide was used. And after the pattern printing, the same gravure printing, vinyl chloride-
An adhesive composed of a vinyl acetate copolymer was applied to the entire surface to form an adhesive layer 4 having a thickness of 4 μm, thereby obtaining a printed sheet.

Next, an uncured resin of an ionizing radiation-curable resin composed of trifunctional urethane acrylate and trimethylolpropane triacrylate is provided on the surface of the printed sheet opposite to the printed surface (that is, the surface on the front side). The liquid was printed by gravure printing in a square planar pattern and an electron beam (acceleration voltage 170 keV, dose 30 kG
Irradiated with y) and crosslinked and cured while maintaining the plate shape of the gravure plate to form a resin pattern layer 1 having a thickness of 5 μm and protruding above the base material sheet 2, to obtain a decorative sheet S. The resin pattern layer 1 was a square having a side of 35 mm, and the area ratio in the decorative sheet was 6%.

The decorative sheet is laminated and integrated on the surface of the resin molded product simultaneously with the molding of the resin molded product by the simultaneous decoration method for injection molding as shown in the conceptual diagram of FIG. A decorative molded product in which the surface of the resin molded product was decorated was obtained. In addition, simultaneous injection molding decoration, the injection molding female mold as a vacuum mold, after inserting the decorative sheet between the male and female molds so that the resin pattern layer faces the female mold side, as a preliminary molding,
After heating to a sheet temperature of 120 ° C. with an infrared radiation type heater to soften the sheet, the sheet is vacuum-formed by vacuum suction through a groove-shaped suction hole provided in the female mold, and the decorative sheet conforms to the female mold cavity shape. I let you. As a result, the decorative sheet does not stretch the resin pattern layer portion, but the base sheet portion of the portion where the resin pattern layer is not formed compensates for the expansion of the decorative sheet as a whole and is shared. It could be performed completely and no cracks were generated in the resin pattern layer.

Thereafter, both male and female molds were clamped, and ABS
The resin was injected from the male gate to obtain a decorative molded product in which the decorative sheet was laminated and integrated on the surface of the resin molded product. The obtained decorative molded product has a pattern, and has a relatively high gloss surface made of a base material sheet made of an acrylic resin on the surface and a relatively low gloss surface of the resin pattern layer [characteristic in FIG. 1 (B). (A fine uneven pattern is formed, though not drawn in an intended manner.), And a highly designed product having a color ink pattern on the back surface of the base material sheet.

Example 2 First, the back side of the base sheet 2 made of a non-colored transparent acrylic resin sheet having a thickness of 125 μm and containing polymethyl methacrylate as a main component was gravure-printed on FIG. The decorative layer 3 having a geometric pattern as shown in the sectional view of FIG. 1 (the shape in plan view is the same as that of FIG. 1A) was printed. Picture printing was performed in the same manner as in Example 1. Further, an adhesive layer 4 coated with a 4 μm thick acrylic-modified polyolefin-based resin obtained by graft-polymerizing methyl methacrylate onto the main chain of the polypropylene structure was formed to obtain a printed sheet.

Next, a resin pattern layer 1 having a thickness of 5 μm and still protruding from the base sheet 2 is formed on the surface of the printing sheet opposite to the printing surface in the same manner as in Example 1. [See FIGS. 1A and 4A]. Resin pattern layer 1
Was a square having a side of 35 mm, and the area ratio in the decorative sheet was 6%. Then, the sheet is passed through a rotary press, and while the sheet is heated to 150 ° C., silicone rubber is applied to a mirror-finished metal roller (a chrome-plated iron cylindrical surface) having a smooth surface and an iron core. By applying pressure between the surface-coated impression cylinder rollers, the resin pattern layer is entirely buried in the base sheet to form a decorative sheet [FIG.
(B)).

Next, using the decorative sheet, Example 1
Perform injection molding simultaneous decoration with preliminary molding in the same way as
A decorative molded product in which the decorative sheet was laminated and integrated on the surface of the resin molded product was obtained. As a result, the decorative sheet does not stretch the resin pattern layer portion, but the base sheet portion of the portion where the resin pattern layer is not formed compensates for the expansion of the decorative sheet as a whole and is shared. It could be performed completely and no cracks were generated in the resin pattern layer. In addition, the obtained decorative molded product has a depth and a three-dimensional appearance in which the curable resin spreads inside the base material sheet while the resin pattern layer is pressed into the base material sheet and has a flat surface as a whole. Resin pattern layer,
In addition, the uneven surface of the surface portion (however, the characteristic pattern of the uneven pattern is not shown in FIG. 4) and the smooth surface of the surface portion of the base sheet are expressed in a pattern, and the back surface of the base sheet is colored. A decorative molded article of high design was obtained by the pattern with the ink.

Example 3 First, the surface to be the back side of the continuous band-shaped base sheet 2 made of a non-colored transparent acrylic resin sheet having a thickness of 125 μm and containing polymethyl methacrylate as a main component was geometrically formed by gravure printing. After printing the decorative layer 3 of the pattern of the scientific pattern, the adhesive layer 4 is further formed by printing.
A printed sheet was obtained. The decorative layer and the adhesive layer were formed in the same manner as in Example 1.

Next, on the surface opposite to the printing surface of the printing sheet, a resin having an uneven pattern on the surface and colored black-brown by a molding plate cylinder method using an apparatus as shown in the conceptual view of FIG. The pattern layer 1 was formed on the front surface of the base sheet 2.

That is, first, the printed base sheet 2
(The printing sheet) is unwound from the unwinding roll 100 and conveyed through a pair of feed nip rollers 110;
The base sheet was pressed by the pressing roller 120 such that the front side of the base sheet 2 was in contact with the molding cylinder 130. At this time, the molding plate cylinder 130 is driven and rotated by an electric motor (not shown) at a peripheral speed synchronized with the transport speed of the base sheet. The molding plate cylinder 130 is a cylinder in which a copper plating layer and a chromium plating layer are laminated on the surface of an iron core, and the surface has a resin pattern layer having a desired concavo-convex pattern and a reverse concavo-convex pattern having the same shape as the formed pattern. A recess 131 is formed. At the lower part of the molding plate cylinder 130, a T-die discharge nozzle 140 is located, from which an uncured resin liquid 150 of an ionizing radiation-curable resin colored by adding a coloring agent is discharged and applied to the plate surface. Then, the uncured resin liquid except for the concave portion 131 is scraped off by the doctor blade 160, and only the concave portion is filled with the uncured resin liquid.

Next, in a state where the base sheet 2 is brought into close contact with the molding plate cylinder 130 with the uncured resin liquid 150 interposed therebetween, an electron beam is irradiated from the ionizing radiation irradiator 170 as ionizing radiation 171 at an accelerating voltage of 200 keV. Irradiation is performed under the condition of a dose of 50 kGy to cross-link and cure the uncured resin liquid 150 to form the resin pattern layer 1 and to form the uneven pattern 5 composed of fine grain-like unevenness at the bottom of the concave portion 131. The resin pattern layer 1 was adhered to the surface of the base sheet 2. At this time, the inside of the molding plate cylinder is hollow, and the molding plate cylinder is cooled by flowing water at 15 ° C. through the hollow portion. Next, by the peeling roller 180,
The base sheet 2 is released together with the resin pattern layer 1, and the resin pattern layer 1 is formed on the base sheet 2 (on which the decorative layer and the adhesive layer have been formed).
The decorative sheet S was obtained as the laminated sheet L on which was laminated (see FIG. 2).

Next, Example 1 was performed using the above decorative sheet.
Perform injection molding simultaneous decoration with preliminary molding in the same way as
A decorative molded product P having a configuration as shown in the cross-sectional view of FIG. 5 and having the decorative sheet S laminated and integrated on the surface of the resin molded product 6 was obtained.
The injection mold made of carbon steel was used at a mold surface temperature of 60 ° C. Then, a part of the thickness of the resin pattern layer was pressed and buried in the base material sheet by heat and pressure during injection molding. As a result, the decorative sheet does not stretch the resin pattern layer portion, but the base sheet portion of the portion where the resin pattern layer is not formed compensates for the expansion of the decorative sheet as a whole and is shared. It could be performed completely and no cracks were generated in the resin pattern layer. In addition, the obtained decorative molded product has a colored resin pattern layer pressed into the inside of the base sheet and has a flat surface as a whole, but has a pattern with a depth inside, and a portion of the resin pattern layer. Is a grain-like matte low gloss, and the other parts are high gloss and are colored black-brown, so that a decorative molded product having a sense of depth and a three-dimensional appearance was obtained.

Here, the decorative molded product P shown in FIG. 5 will be described. The resin pattern layer 1 made of a cured product of an ionizing radiation-curable resin having an uneven pattern 5 on the surface is partially covered by a thickness. Is partially formed by being buried in a base sheet 2 made of a thermoplastic resin, and on the other surface (back side surface) of the base sheet 2, a pattern layer 3 </ b> A having a patterned pattern as a decorative layer 3. And the entire solid layer 3B on the entire surface are formed in this order,
Further, the decorative sheet S having a configuration in which the adhesive layer 4 is formed is a decorative molded product P having a configuration in which the decorative sheet S is laminated and integrated with the resin molded product 6.

[0073]

(1) According to the simultaneous injection molding and decorating method of the present invention, there is no need to provide a concavo-convex pattern in a post-process after the injection-molding process. Difficult, uneven feeling, three-dimensional feeling, depth feeling, etc. can be provided. Moreover, even when a picture is provided by printing or the like, a decorative molded article having good durability can be obtained. (2) According to the simultaneous injection molding and decorating method of the present invention in the form of providing an uneven pattern on the surface of the resin pattern layer, there is no need to provide an uneven pattern in a subsequent step after the injection molding step, and the number of steps is not increased. In addition, a durable and hard-to-disappear, uneven feeling, three-dimensional feeling, depth feeling, and the like can be provided. Moreover, even when a picture is provided by printing or the like, a decorative molded article having good durability can be obtained. In addition to these, a decorative molded product with a higher design can be obtained by designing a low gloss surface pattern according to the pattern shape of the resin pattern layer formed partially. (3) Further, if the resin pattern layer is buried in the base material sheet, in addition to the above-described effects, the resin pattern layer having a partially different gloss, color tone, etc. on a flat surface as a whole. Embedded in the base sheet is obtained. Therefore, it is possible to obtain a decorative molded article having an uneven feeling, a three-dimensional feeling, a depth feeling, and the like, and having excellent durability and design properties, which is excellent in the wear resistance of the resin pattern layer. (4) Further, if a decorative treatment is performed on the base sheet, the decorative molded product can be designed to have a higher design. (5) If an adhesive layer is further provided on the outermost surface of the decorative sheet,
Adhesion between the decorative sheet and the resin molded product can be reliably given to the decorative molded product.

[Brief description of the drawings]

FIG. 1 is a plan view and a cross-sectional view showing an embodiment of a decorative sheet used in the present invention.

FIG. 2 is a sectional view showing another embodiment of the decorative sheet used in the present invention.

FIG. 3 is a sectional view showing an example of a decorative molded product obtained by the present invention.

FIG. 4 is a cross-sectional view showing another embodiment of the decorative sheet used in the present invention, including its manufacturing process.

FIG. 5 is a cross-sectional view showing another example of a decorative molded product obtained by the present invention.

FIG. 6 is a conceptual diagram showing an example of a method for forming a resin pattern layer on a decorative sheet used in the present invention.

FIG. 7 is a conceptual diagram illustrating an injection molding simultaneous decorating method of the present invention in one embodiment.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 resin pattern layer 2 base sheet 3 decorative layer 3A pattern layer 3B solid layer 4 adhesive layer 5 uneven pattern (on resin pattern layer) 6 resin molding 41 suction hole 42 sheet clamp 100 unwinding roll 110 feed nip roller 120 Press roller 130 Mold plate cylinder 131 Depression (of mold plate cylinder) 140 Discharge nozzle 150 Uncured resin liquid 160 Doctor blade 170 Ionizing radiation irradiator 171 Ionizing radiation 180 Peeling roller L Laminated sheet Ma Injection molding die (male) Mb Injection molding Mold (female mold) P Decorative molded product S Decorative sheet

Claims (5)

[Claims] 1. A decorative sheet having a resin pattern layer partially formed of a cured product of an ionizing radiation-curable resin on a surface of a base sheet made of a thermoplastic resin, wherein the decorative sheet is provided. Is inserted between the female mold and the male mold of the injection molding machine such that the resin pattern layer side faces the female mold side, and then both molds are clamped, and a fluid state is formed in a cavity formed by both molds. Injecting and filling the resin, and then solidifying the resin into a resin molded product, and bonding and integrating the decorative sheet on the surface of the resin molded product to form a decorative molded product. Decoration method. 2. A decorative sheet having a resin pattern layer made of a cured product of an ionizing radiation-curable resin and partially formed on a surface of a substrate sheet made of a thermoplastic resin,
Prepare a decorative sheet having an uneven pattern on the surface of the resin pattern layer, the decorative sheet so that the resin pattern layer side faces the female side, between the female mold and the male mold of the injection molding machine Inserting, then clamping both molds, injecting and filling the resin in the flow state into the cavity formed by both molds, then solidifying the resin to form a resin molded product, A method for simultaneous decoration by injection molding, wherein the decorative sheet is bonded and integrated to the surface to form a decorative molded product. 3. A decorative sheet having a resin pattern layer partially formed of a cured product of an ionizing radiation-curable resin on a surface of a base sheet made of a thermoplastic resin,
Prepare a decorative sheet in which the resin pattern layer is partially or entirely buried in the base sheet, and inject the decorative sheet so that the resin pattern layer side faces the female mold side. Insert between the female mold and the male mold of the molding machine, then clamp both molds, inject and fill the resin in the flow state into the cavity formed by both molds, then solidify the resin The injection molding simultaneous decorating method according to claim 1 or 2, wherein the decorating sheet is bonded to and integrated with a surface of the resin molded product to form a resin molded product. 4. The simultaneous injection-molding and decorating method according to claim 1, wherein a decorative sheet obtained by further performing a decoration treatment on a base sheet is used. 5. The simultaneous injection molding and decorating method according to claim 1, further comprising using a decorative sheet having an adhesive layer formed on the rearmost surface.