JPH10250213A - Transfer sheet and manufacture for decorative member using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manufacture a decorative member by using a transfer sheet by a method wherein in the transfer sheet having formability capable of being transferred even to an irregular surface, a peeling strength can be adjusted in order to make foil holding and aptitude for peeling excellent. SOLUTION: In a transfer sheet having at least a peeling layer 3 and a pattern layer 4 by laying a transfer layer 2 on an olefin thermoplastic elastomer film as a base material 1, the peeling layer contains 1-30wt.% of chlorinated polyolefin resin as a second component resin other than a first component resin to total amount of the layer. In order to manufacture a decorative member, the transfer sheet is used, the transfer layer is transferred to a material to be transferred with a vacuum press method or an injection molding coincidently muffle painting transfer method.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a decorative member for applying a pattern to a surface by transfer and a transfer sheet used in the method.

[0002]

2. Description of the Related Art Conventionally, a polyethylene terephthalate film is generally used as a base material of a transfer sheet for a decorative member having a flat transfer surface. However, in order to transfer a pattern to the surface of various decorative members such as a resin injection molded product or a wood base material, particularly a transfer surface having an uneven surface, the transfer sheet base material needs to be a resin film having moldability. Vinyl chloride resin films have been widely used. Such a transfer film is disclosed, for example, in Japanese Patent Publication Nos. 6-69759, 7-29518, and 7-100398. In the above, there is a configuration in which a pattern layer made of a releasable cellulose-based ink or the like is directly provided on a base material, and in the case of a design layer provided directly on a base material, a release layer provided directly on a base material is provided. With any one of polyvinyl butyral, cellulose acetate propionate resin or chlorinated polypropylene resin
It is composed of seeds.

[0003]

However, in the above, when printing is performed to directly provide a pattern layer on a base material, the solvent attacks the vinyl chloride resin film of the base material and the peel strength is unstable. Problem. Further, in the above, there is a problem that the plasticizer contained in the vinyl chloride resin film of the base material bleeds out and the peel strength becomes unstable. Further, in the above, there is a problem that the resin used for the release layer is limited to a specific resin such as polyvinyl butyral, cellulose acetate propionate resin, and chlorinated polypropylene resin. As described above, in the decoration of a transferred object having an uneven surface such as a three-dimensional molded product, the vinyl chloride resin film has excellent moldability, but as a transfer sheet base material, it has easy-to-use and satisfactory performance. I didn't. Therefore, for example,
No. 0 discloses a transfer sheet using, as a substrate, other plastic films such as a polystyrene resin, an acrylonitrile resin, and an ABS resin in addition to a vinyl chloride resin. However, in the above, it is necessary to provide an anchor layer on the base material in order to improve the adhesion to other layers of the plastic film, and a structure in which a release layer, a picture layer, etc. are provided on the anchor layer will not be provided. I can't get it. Therefore, when the transfer sheet is formed and transferred due to the anchor layer and the release layer, the suitable temperature range for thermoforming is narrowed. Therefore, the present inventor uses a vinyl chloride resin film base material, and as a transfer sheet that does not require ancillary layers such as an anchor layer on the base material, as a base film having appropriate peelability and moldability by itself. Has been studying transfer sheets using polyethylene and polypropylene films. Further, the transfer sheet made of such a polyethylene or polypropylene film is also a measure against the vinyl chloride resin film that generates hydrochloric acid gas as a measure against the global environment. However, in the transfer sheet using these films, the crystallinity of the film is high,
Because the material softens suddenly at the melting point, the range of molding conditions for the transfer sheet is narrow, and when it is stretched by heat during molding, it partially whitens due to necking, and the extension of the whitened portion becomes larger than that of other places. There was a problem that the uniformity was unstable. When manufacturing a transfer sheet, it is necessary to appropriately adjust the peel strength between the base material and the transfer layer. If the peel strength is too light, the transfer layer itself will spill during handling, failing to function as a transfer sheet. Therefore, an appropriate peel strength is required (foil durability). On the other hand, if the peeling strength is too strong, the base material of the transfer sheet cannot be peeled off between the base material and the transfer layer at the time of peeling, resulting in peeling failure. Therefore, it is also important that the base material of the transfer sheet can have an appropriate peel strength. However, these substrates made of polyolefin resins such as polyethylene have a problem that the peel strength is generally too light with respect to ordinary transfer layer resins.

[0004]

Means for Solving the Problems In order to solve the above-mentioned problems, first, a transfer sheet according to the present invention comprises an olefin-based thermoplastic elastomer film as a base material, a transfer layer on the base material, at least a release layer and a pattern. In the transfer sheet having a layer, the release layer contains a chlorinated polyolefin resin as a second component resin in addition to the first component resin in an amount of 1 to 30% by weight based on the total weight of the layer. . As a result, an appropriate peel strength was obtained, and moldability was also provided.

Further, the first method of the present invention for producing a decorative member is described.
The method of the above, by a vacuum press method, the transfer sheet,
After being pressed against and adhered to the transfer object by the air pressure and the contraction force of the elastic film, the base material of the transfer sheet was peeled off, and the transfer layer was transferred onto the surface of the transfer object. As a result, it is possible to transfer onto a transfer target having an already-formed uneven surface with good peel strength. Further, the second method of the method for manufacturing a decorative member of the present invention is based on a simultaneous painting transfer method by injection molding.
With the transfer sheet inserted between a pair of molds, both molds are clamped, and the cavity formed by both molds is filled with a molten resin, and the transfer sheet is brought into close contact with the surface of the molded product at the same time as molding. After that, both molds were opened, the base material of the transfer sheet was peeled off, and the transfer layer was transferred to the surface of the transfer object formed of a molded product. As a result, the resin can be transferred onto the transfer object or the like on the uneven surface with good peel strength simultaneously with the resin molding.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a transfer sheet of the present invention and a method for manufacturing a decorative member using the same will be described in detail with reference to the drawings.

FIG. 1 is a sectional view showing one embodiment of the transfer sheet of the present invention. As illustrated in the drawing, the transfer sheet 10 of the present invention has at least a release layer 3 and a picture layer 4 made of a specific material provided as a transfer layer 2 on a base material 1 made of an olefin-based thermoplastic elastomer film. It is of a configuration. As another form of the transfer sheet of the present invention, for example, a transfer sheet having an adhesive layer on the surface of the picture layer 4 may be used. Needless to say, the adhesive layer may not be provided on the transfer sheet when the picture layer has an adhesive property to the transfer object, or when the adhesive layer is applied to the transfer object side by coating or painting.

[Substrate] An olefin-based thermoplastic elastomer film is used for the substrate 1. For example, the following olefin-based thermoplastic elastomers can be used.

[0009] Japanese Patent Publication No. Hei 6-23278,
(A) As a soft segment, the number average molecular weight Mn is 2
5,000 or more, 10 to 90% by weight of a boiling heptane-soluble polypropylene having a ratio Mw / Mn ≦ 7 of the weight average molecular weight Mw to the number average molecular weight Mn, and (B) a soft segment having a melt index of 0.1 90 to 10% by weight of boiling heptane-insoluble polypropylene of ４4 g / 10 min,
Soft polypropylene consisting of a mixture with:

As described in JP-B-53-21021, (A) an olefin polymer (crystalline polymer) such as polyethylene, polypropylene or polymethylpentene is used as a hard segment, and (B) a partially crosslinked ethylene- Propylene copolymer rubber, unsaturated ethylene-propylene-
An olefin-based elastomer obtained by using a monoolefin copolymer rubber such as a non-conjugated diene terpolymer rubber as a soft segment, and uniformly mixing and mixing these. Incidentally, monoolefin rubber / olefin polymer = 50/50 to 90
/ 10 (weight ratio).

As described in Japanese Patent Publication No. 53-34210, (B) uncrosslinked monoolefin copolymer rubber (soft segment) and (A) olefin copolymer (crystalline, hard segment) are crosslinked. An olefin-based elastomer obtained by mixing with an agent, heating and applying shear stress to dynamically partially cross-link. (B) Monoolefin rubber / (A)
Olefin copolymer = 60/40 to 80/20 (weight ratio).

As described in JP-B-56-15741, (A) mixing with a peroxide such as isotactic polypropylene, propylene-ethylene copolymer or propylene-butene-1 copolymer, and heating to reduce the molecular weight. Mixing and heating with a peroxide-decomposable olefin polymer (hard segment) that increases fluidity and (B) a peroxide such as ethylene-propylene copolymer rubber, ethylene-propylene-non-conjugated diene terpolymer rubber, etc. Mixes with peroxides such as peroxide-crosslinked monoolefin copolymer rubber (soft segment), which crosslinks and reduces fluidity, (C) polyisobutylene, butyl rubber, etc.
Peroxide non-crosslinked hydrocarbon rubber (soft segment and fluidity-modifying component) that does not crosslink even when heated and does not change fluidity, and (D) mineral oils such as paraffinic, naphthenic, and aromatic An olefin-based elastomer obtained by mixing a softener and dynamically heat-treating the mixture in the presence of an organic peroxide. (A) is 90 to 40 parts by weight, (B) is 10 to 60 parts by weight.
(A) + (B) = 100 parts by weight,
(C) and / or (D) have a compounding ratio of 5 to 100 parts by weight.

An olefin-based thermoplastic elastomer comprising an ethylene-styrene-butylene copolymer as described in JP-A-2-139232.

The above-mentioned olefin-based thermoplastic elastomer having a hydroxyl group and / or a carboxyl group as a polar group. For example, an olefin-based thermoplastic elastomer having a hydroxyl group introduced by graft polymerization of an ethylene-vinyl alcohol copolymer or the like and a carboxyl group introduced by a copolymer of maleic acid, fumaric acid, itaconic acid or the like is used. Either of these hydroxyl groups and carboxyl groups,
Or, both may be used in combination, and these polar groups have an effect of adjusting the peel strength with a transfer layer such as a peel layer.

The above-mentioned olefin-based thermoplastic elastomer can be formed into a film by a conventionally known film forming method such as a calendering method, an inflation method or a T-die extrusion method. The thickness of the film used depends on the molding method and the like, but is about 20 to 500 μm. Further, the film may be either a stretched film or an unstretched film, but it is preferable to use an unstretched film in consideration of moldability for three-dimensional molding. Further, in order to adjust the peel strength between the base material and the transfer layer to an appropriate level, the olefin-based thermoplastic elastomer used for the base material has a polar group as described above, or corona treatment of the base material,
Plasma treatment or the like may be performed.

The above-mentioned olefin-based thermoplastic elastomer has the same three-dimensional moldability and mechanical strength as the conventionally used semi-rigid (plasticizer content of 10 to 30 phr in terms of dioctyl phthalate) vinyl chloride resin. It is necessary to have. For this purpose, the breaking strength at 25 ° C. is 300 to 400 kg / cm ² , and the breaking elongation at 25 ° C. is 150 to 400 kg / cm ² .
180%, breaking strength at 70 ° C is 200-300kg
One having a breaking elongation at 70 ° C./cm ² of 160 to 200% is selected. The measured value is a value based on JIS-K-6734. If the breaking strength at 25 ° C. exceeds this value or the breaking elongation is less than this value, the three-dimensional formability at room temperature is insufficient, and at 70 ° C., the breaking strength exceeds this value,
Alternatively, if the elongation at break is less than this value, heat molding (usually 7
Three-dimensional moldability at about 0 ° C. to 150 ° C.) is insufficient. 2
If the breaking strength at 5 ° C. is less than this value, the transfer sheet is likely to break during three-dimensional molding at room temperature. If the breaking elongation at 25 ° C. exceeds this value, the registration accuracy in multicolor printing Becomes defective. If the breaking strength at 70 ° C. is less than this value or the breaking elongation exceeds this value, the distortion of the picture during three-dimensional molding becomes remarkable.

[Release Layer] The release layer 3 is a part of the transfer layer, and after the transfer, is transferred to the transfer target and serves as a protective layer for protecting the surface of the transfer target from chemicals, ultraviolet rays, abrasion, and the like.
It is provided as appropriate in order to adjust the adhesiveness of the transfer layer to the substrate and to make the releasability appropriate. The resin constituting the release layer comprises a mixed system of the first component and the second component. As the resin of the first component, a resin excellent in elongation suitability is preferable in order to give an appropriate peelability and to perform three-dimensional molding. As the resin as the main component, a resin other than the chlorinated polyolefin resin, for example, a polyvinyl butyral resin, a cellulose resin such as nitrocellulose, an acrylic resin, a polyamide resin, a urethane resin, or vinyl chloride-acetic acid A vinyl copolymer, or an ionizing radiation-curable resin such as a rubber-based resin or an acrylate-based resin can be used. Further, in addition to these resins, a chlorinated polyolefin resin is contained as a second component in an amount of 1 to 30% by weight based on the total amount of the release layer. By containing the chlorinated polyolefin resin in a specific amount as the second component,
Appropriate adjustment of the peel strength becomes possible. By adding a chlorinated polyolefin resin, the peel strength of the release layer is 1st.
It has the effect of increasing compared to the case where only the component resin is used.
When the content of the chlorinated polyolefin is less than 1% by weight, the effect is not obtained, the peel strength is low, the foil holding property is reduced, and
Exceeding the weight percent is not preferred because the peel strength is too strong and peeling failure occurs. As the chlorinated polyolefin resin, chlorinated polyethylene, chlorinated polypropylene, and the like are used, and usually, chlorinated polypropylene has a favorable effect and is easy to use. In addition, in the transfer sheet of the present invention, since the olefin-based thermoplastic elastomer is used as the base material, compared with a conventional transfer sheet using a vinyl chloride resin, polyethylene, polypropylene, or the like, a release layer that can be used. There is also an advantage that there is little restriction on the resin. That is, in the above-mentioned conventional technology, the release layer is limited to a single layer of polyvinyl butyral, cellulose acetate propionate resin, chlorinated polypropylene resin, or the like from the viewpoint of the releasability from the vinyl chloride resin film. However, these resins are poor in abrasion resistance, chemical resistance, and solvent resistance, and are limited to applications where surface properties after transfer are not particularly required. On the other hand, in the present invention, if necessary, a urethane-based resin, an ionizing radiation-curable resin, or the like having excellent surface properties such as solvent resistance can be used as the surface protective layer. As a result, since there is little restriction on the resin of the release layer which becomes the surface layer of the transferred body after the transfer, the surface physical properties of the obtained decorative member, for example, the surface physical properties such as solvent resistance, scratch resistance and abrasion resistance are required. Therefore, an excellent transfer sheet that can be designed more freely according to the conditions. In addition, since excellent surface properties can be imparted, the release layer formed by transfer can be used as a paint finish. The thickness of the release layer is 0.5 to 30 μm, usually about 2 to 10 μm. The surface protective layer as a decorative member may be formed by spray coating or the like after transferring the transfer layer.

In order to further improve the weather resistance (light resistance), one or both of an ultraviolet absorber and a light stabilizer can be added to the release layer. Both the agent and the light stabilizer are usually about 0.5 to 10% by weight, but it is generally preferable to use an ultraviolet absorber and a light stabilizer in combination. If the amount is less than this, the effect of improving the weather resistance cannot be sufficiently obtained, and if it is more than this, coloring occurs, and even if it is contained in a large amount, there is no effective change, which is not preferable. Examples of the ultraviolet absorber include benzotriazole-based, benzophenone-based, salicylic acid-based and other organic ultraviolet absorbers, and fine particles of zinc oxide and cerium oxide having a particle size of 0.2 μm or less.
An inorganic substance such as titanium oxide can be used. As the light stabilizer, a hindered amine radical scavenger such as bis- (2,2,2,6,6-tetramethyl-4-piperidyl) sebacate can be used.

[Pattern Layer] Next, the pattern layer 4 is formed by printing or coating a pattern such as a pattern, a solid pattern, or the like, using a known vehicle mixed with an ink or a coating liquid containing a pigment or the like. It is. As a printing method, a conventionally known printing method such as gravure printing, offset printing, letterpress printing, flexographic printing, or silk screen printing can be used.
For the all solid pattern, a conventionally known coating method such as a gravure coat and a gravure reverse coat can be used.

Various printing inks or coating liquids for the picture layer can be used, and a binder resin, a coloring agent, a solvent and, if necessary, an extender pigment, a curing agent, various additives, etc. The added composition can be used. As the binder resin, for example, acrylic resin, chlorinated polyethylene, chlorinated polypropylene, vinyl acetate, vinyl chloride-vinyl acetate copolymer, thermoplastic resin such as cellulose resin, room temperature or thermosetting polyurethane such as polyurethane Conventional resins such as resins and ionizing radiation curable resins such as acrylic resins can be used alone or as a mixture of these resins. In the transfer sheet of the present invention, since the olefin-based thermoplastic elastomer is used as the base material, even when the pattern layer is provided directly on the base material, compared to the conventional vinyl chloride resin, polyethylene, polypropylene, and other films, a wide range is used. Although a suitable binder resin can be used, when a pattern layer is provided on the release layer, the binder resin can be used in a wider range. In addition, as a coloring agent, inorganic pigments such as titanium white, zinc white, red iron oxide, vermilion, ultramarine blue, cobalt blue, titanium yellow, graphite, carbon black, isoindolinone, Hansa Yellow A, quinacridone, permanent red 4R, Pearlescent pigments made of organic pigments (or dyes) such as phthalocyanine blue, indathrene blue RS, and aniline black; metal pigments such as aluminum and brass; titanium dioxide-coated mica; and foil powders such as basic lead carbonate. And other conventionally known coloring pigments. As the extender pigment, calcium carbonate, silica, alnami, barium sulfate and the like are used. In addition, the ultraviolet absorber and / or
Alternatively, a light stabilizer can be mixed and used. The pattern of the pattern layer is, for example, a wood pattern, a stone pattern, a cloth pattern,
It is arbitrary such as a leather drawing pattern, a character, a geometric figure, a symbol, a line drawing, various abstract patterns, a solid pattern on the entire surface, or a combination thereof.

As the picture layer, a metal thin film may be entirely or partially laminated in a pattern. The metal thin film is made of a metal such as aluminum, chromium, gold, silver, copper, etc. The film is formed by a method such as sputtering. To form a pattern, a removal layer is formed in a desired pattern with a water-soluble ink on a unnecessary portion of the metal thin film. A known method such as removal of the metal thin film immediately above the surface is used. The picture layer is a layer formed by printing or the like,
A combination with this metal thin film may be used.

[Adhesive Layer] The adhesive layer can be provided as a part of the transfer layer, if necessary. Further, the adhesive layer may be applied to the transfer object side by a coating method using a roll coat or the like or a coating method using a spray coat or the like. In the case where an adhesive layer is applied to the transfer object, and when the picture layer itself has adhesiveness to the transfer object, the adhesive layer as the transfer layer can be omitted. As the resin of the adhesive layer, it is naturally necessary to consider the adhesiveness to the transfer object, and an adhesive material is appropriately selected depending on the material of the transfer object described later.

As a resin for such an adhesive layer, for example, an acrylic resin is one of preferred resins. This is because the acrylic resin can easily adjust the adhesion according to the material of the transfer-receiving body by copolymerizing various acrylic esters, methacrylic esters, and other vinyl monomers. For example, when the transfer object is an ABS resin, this acrylic resin is a preferable resin. When the transfer object is a vinyl chloride resin such as a vinyl chloride resin, other resins may be appropriately used depending on the material of the transfer object, such as mixing and using a vinyl chloride-vinyl acetate copolymer in addition to the acrylic resin. In some cases, more excellent adhesion may be obtained by mixing and using. The mechanism for developing the adhesive layer may be a heat-sensitive type in which adhesiveness is developed by heating used in a so-called transfer sheet, or a pressure-sensitive type or a solvent-activated type. In the case of the pressure-sensitive type, the transfer sheet usually has a configuration in which a release paper or a release film is laminated on the surface of the adhesive layer in order to protect the adhesive layer until immediately before transfer. The thickness of the adhesive layer is usually about 1 to 50 μm. As described above, in the transfer sheet of the present invention, there is a case where an adhesive is applied to the transfer sheet side and / or the object to be transferred and then transferred without providing the adhesive layer. If the transfer sheet has an adhesive layer and the adhesive is also applied to the transfer object side, there is an effect of further improving the adhesion of the transfer layer. In the case of manufacturing a decorative member such as a three-dimensional three-dimensional molded product in which a transfer layer is transferred by solidifying the resin from a liquid resin such as an injection molding simultaneous painting method, the liquid resin itself functions as an adhesive. Sometimes.

Here, with respect to the transfer object of the transfer sheet of the present invention, the transfer object is not particularly limited to its material and shape. For example, the material may be an acrylic resin, a vinyl chloride-based material. Resin, acrylonitrile-
Butazine-styrene copolymer (ABS resin), polycarbonate resin, polyethylene, polypropylene, phenol resin, etc., or metal or metal compound such as aluminum, iron, stainless steel, brass, plywood, wood board, medium density Woods such as fiberboard (MDF) and the like, ceramics such as glass, ceramics and tiles, cement such as ALC (lightweight cellular concrete) and GRC (fiber reinforced concrete) and the like are optional. Also, the shape is an extruded body of resin,
It is arbitrary such as an injection molded body, a press molded body, a flat plate, a curved plate, a rod-shaped body and the like. Regarding the shape, in the simultaneous-painting transfer method, the shape of the transferred object is formed simultaneously with the transfer.

By the way, the transfer sheet of the present invention as described above can of course be applied to a transfer object having a flat transfer surface, but the transfer sheet of the present invention using an olefin-based thermoplastic elastomer film as a base material. The sheet exhibits its true value when it is applied to an object to be transferred having an uneven surface. As a method of transferring the image to the transfer object using the transfer sheet of the present invention, for example, the following various known transfer methods can be used.

JP-B-2-42080, JP-A-6-42080
As described in JP-A-315950, etc., after a transfer sheet is disposed between both male and female molds of injection molding, a molten resin is injected and filled into the mold, and the transfer sheet is formed on the surface of the resin molded product at the same time as molding. So-called injection molding simultaneous painting transfer method, in which a transfer layer is transferred from an image forming apparatus, JP-B-56-45768 (overlay method),
As described in Japanese Patent Publication No. 60-58014 (vacuum pressing method) or the like, a transfer sheet is placed on the surface of a three-dimensional article such as a molded article, facing or placed with an adhesive therebetween as necessary. A transfer method using a so-called vacuum forming and laminating method in which a transfer layer of a transfer sheet is transferred to the surface of a three-dimensional article by a pressure difference caused by vacuum suction from the three-dimensional article side; As described in JP-A-2666, etc., in the major axis direction of a columnar substrate such as a cylinder and a polygonal column, a transfer sheet is supplied in a plurality of directions while appropriately supplying a transfer sheet through an adhesive layer as necessary. With different rollers, the decorative sheet is successively pressed and adhered to a plurality of side surfaces constituting the columnar base material and the transfer layer is transferred, so-called a wrapping method, a transfer method using a so-called wrapping method, and a BMC (Bulk Molding Compound) molding method. S
Various molding methods in FRP (Fiber Reinforced Plastics) such as MC (Sheet Molding Compound) molding method and hand lay-up molding method, or RIM (Reaction Injiction)
Molding), and a molding method such as a matched molding method.

The above-mentioned molding method and the above-mentioned molding method simultaneously transfer the three-dimensional shape of the three-dimensional molded product to the three-dimensional shape.
And are for transferring a three-dimensional shape to a molded article already formed. In the above method, a resin mold,
Alternatively, there is a method in which after a transfer sheet is preformed by another mold, resin is injection-molded and transferred at the same time as molding. Similarly, in the methods listed, there are cases where the three-dimensional forming of the transfer sheet is performed simultaneously with forming and cases where pre-forming is performed before forming. In the hand lay-up method, the transfer sheet is formed by preliminary forming.

Among the various molding methods described above, the vacuum pressing method and the simultaneous painting / transferring method for injection molding are representative molding methods. Therefore, as a method of manufacturing the decorative member of the present invention using the transfer sheet, a manufacturing method using the vacuum press method and the simultaneous injection painting transfer method will be described.

FIG. 2 is an explanatory view of a method of manufacturing a decorative member using a vacuum press method among the transfer methods using the above-mentioned vacuum forming and laminating method. The vacuum pressing method is similar to the vacuum laminating method, but uses not only air pressure but also the contraction force (shrinkage pressure) of a rubber-like elastic film as an elastic film to press the transfer sheet against the transfer target. Is slightly different in that the heating is performed through a rubber-like elastic film heated by a heater, and is characterized by uniform heating of the transfer sheet and a stronger pressing force.

The vacuum press 3 shown in the schematic diagram of FIG.
0 is a vertical movement means 13 such as a hydraulic cylinder
There is an upper chamber 11 which can move up and down, and a lower chamber 21 is provided below and facing the upper chamber 11. An infrared radiation type heater 12 is disposed inside the upper chamber 11. Upper room 11
Is entirely covered with a rubber-like elastic film 15. Silicon rubber or the like is usually used for the rubber-like elastic film 15. The upper surface of the lower chamber 21 is a table 22 having a plurality of exhaust holes 23. The upper chamber 11 and the lower chamber 21 have supply / exhaust ports 14 and 24, respectively, so that their internal pressures can be adjusted independently. In the vacuum press method, first, in a state where the upper chamber 11 moves upward and is separated from the lower chamber 21, the transfer object 20 is arranged on the mounting table 22, and the transfer sheet 10 is arranged from above the transfer object 20. . At that time, the transfer sheet 1
The transfer layer side of “0” faces the transfer-receiving body 20. If the adhesive is to be applied to the outer surface of the transfer sheet or the transfer object, it is applied at this stage. If the adhesive contains a solvent, it is dried at this stage. Next, the upper chamber 11 is moved downward and pressed against the lower chamber 21 to seal the upper chamber 11 and the lower chamber 21. FIG. 2 shows this state. Next, the pressure in the lower chamber 21 is reduced, and the pressure in the upper chamber 11 is increased. Further, the transfer sheet 10 is heated and softened through the rubber-like elastic film 15 using the heater 12 to be in a moldable state. As a result, the transfer sheet 10 moves along the outer surface of the
Due to the pressure difference between the upper chamber 11 and the lower chamber 21 and the contraction pressure of the rubber-like elastic film 15, the transfer sheet 10 is brought into close contact with the transfer target body 20 due to the deformation pressure. Finally, the pressure in the lower chamber 21 is released, and the pressure in the upper chamber 11 is released to bring both chambers to atmospheric pressure. The upper chamber 11 is moved upward to separate the upper chamber 11 and the lower chamber 21 from each other. By removing the transfer-receiving body 20 to which the transfer layer 10 is adhered, and peeling off the transfer sheet 10 (the base material 1), a decorative member having a transfer layer transferred thereon and a pattern formed on an uneven surface is obtained.

Next, FIG. 3 is an explanatory view of a method for manufacturing a decorative member by the simultaneous injection molding and painting transfer method. The figure shows a state in which the molten resin has already been injected and filled into the cavity, and the transfer sheet 10 has also been formed and adhered to the resin. A female die 81 having concave cavities is fixed to a movable die plate (movable plate) 71, and a male die 82 having injection holes is fixed to the other die plate (fixed plate) 72, and a nozzle is provided on the back surface thereof. 73 is located. The die plate 71 is moved left and right by a hydraulic cylinder 74 on the rear surface in the drawing, and the female mold 81 and the male mold 82 are pressed against each other to perform mold clamping.
The transfer sheet 10 is inserted between the female mold 81 and the male mold 82. In addition, a suction hole connected to the vacuum pump VP through a suction pipe is formed in the cavity surface of the female mold 81,
The transfer sheet 10 is heated and softened by a heating plate (not shown) using a cavity surface of the female mold 81 before clamping, and is preliminarily vacuum-formed. Then, after the heating plate is retracted, the mold is clamped, and the molten resin 83 is injected from the nozzle 73 into the cavity (molding cavity).
After injection, filling and cooling to solidify the resin, the mold is opened. Then, the transfer sheet 10 (substrate of) from the molded product
Is peeled off, a decorative member having a transfer pattern transferred thereto and a pattern design applied to the uneven surface is obtained.

The decorative member according to the present invention can be used for interior decoration of buildings such as walls, ceilings, floors, etc., for surface decoration of fittings such as window frames, doors, handrails, and for cabinets of furniture and light electric / OA equipment. It is used as surface makeup, vehicle interiors such as automobiles, trains, and aircraft, or containers such as bottles, cans, boxes, and cups.

[0033]

EXAMPLES The present invention will be described more specifically with reference to examples and comparative examples.

An olefin thermoplastic elastomer obtained by mixing 10 parts by weight of a partially crosslinked hydrogenated styrene-butazine rubber as a soft segment based on 100 parts by weight of a crystalline segment of isotactic polypropylene as a hard segment is used as a thermoplastic elastomer. The film was extruded from a die to a thickness of 100 μm to obtain a film for a base material. On this substrate, Table 1
In addition to the first component resin, a second release layer
A layer formed by adding 0 to 50% by weight of chlorinated polypropylene as a component to the total amount of the release layer is formed by gravure coating at a coating amount (solid basis, the same applies hereinafter) of 2 g / m ² , and A wood pattern pattern layer made of a mixed resin of an acrylic resin and a nitrocellulose resin is formed thereon by gravure printing, and an adhesive layer made of a polyamide resin is coated on the pattern layer with a gravure coat at a coating amount of 30 g / m. ² to form a transfer sheet.

Next, in each of the transfer sheets described above, the peel strength, the foil holding property, and the peeling suitability were transferred to the three-dimensional surface of a wooden molded product made of MDF by a vacuum press transfer method using the apparatus and method shown in FIG. The results of an attempt to transfer by an injection molding simultaneous painting transfer method using the apparatus and method shown in FIG. 3 using ABS resin were evaluated as follows. The results are shown in Tables 2 and 3.

Peel strength: The base material of the transfer sheet on the object to be transferred was peeled off at 90 ° at a speed of 1 m / min at a width of 25 mm.
The strength was measured. Foil durability: In the form of a transfer sheet, it was evaluated whether or not the transfer layer peeled off from the substrate. ○: those which do not peel off, △: those which peel slightly
And Peelability: When peeling the base material of the transfer sheet on the transfer object, the peeling is heavy (the peel strength is too strong), and it is difficult to peel only the base material, or the transfer layer may be peeled together with the base material. We evaluated whether not to get up. The sample was peeled off when only the substrate was peeled off without any problem, and the sample was peeled off when only the substrate was not peeled off.

[0037]

[Table 1]

[0038]

[Table 2]

[0039]

[Table 3]

As described above, in the transfer sheet in each of the examples, the transfer layer did not peel off before the setting.
In addition, even when the transfer sheet was peeled off from the substrate after the transfer sheet was in close contact with the transfer object, good peeling suitability was exhibited without any problem such as defective peeling. On the other hand, in each of the comparative examples, the transfer layer was peeled off before the setting, and even when the transfer sheet was separated from the base material after the transfer sheet was in close contact with the transfer target, a separation failure in which only the base material could not be separated occurred. Further, in each of the embodiments, the transfer sheet follows the uneven surface of the transfer-receiving body, does not cause a transfer defect, and has a pattern unevenness due to necking of the base material (film) and an uneven temperature caused by heating the transfer sheet. There was obtained a decorative member which was free from distortion and the like, and was decorated with an uneven surface excellent in beauty.

[0041]

According to the transfer sheet of the present invention, a layer containing a olefin-based thermoplastic elastomer as a base material and containing a chlorinated polyolefin as a second component with respect to a resin of the first component in a specific amount range. In order to use as a peeling layer, by adjusting the content of the second component, the peel strength can be easily adjusted,
Both foil durability and peelability can be achieved. In addition, even when the surface to be transferred has an uneven surface, it is excellent in elongation suitability, so that decoration of a three-dimensional decorative member can be transferred similarly to the conventionally used vinyl chloride resin. In addition, since the base material of the olefin resin is a thermoplastic elastomer, the crystallinity is lower than that of a normal polyolefin resin, and the unevenness of the pattern due to necking during transfer sheet molding,
No distortion or the like occurs. Furthermore, since the change in fluidity and plasticity of the resin with respect to the temperature change becomes more gentle, the resin is less susceptible to fluctuations in temperature conditions during molding, and the processing conditions are widened. In addition, since the base material produced as transfer sheet waste material is an olefin resin, it does not generate hydrogen chloride gas even when incinerated like the conventional base material vinyl chloride resin, and is suitable for global environmental measures. Is excellent.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating one embodiment of a transfer sheet of the present invention.

FIG. 2 is an explanatory view by a vacuum press transfer method as an embodiment of a method for manufacturing a decorative member of the present invention.

FIG. 3 is an explanatory view showing another embodiment of the method of manufacturing a decorative member according to the present invention, which is a simultaneous painting and painting transfer method by injection molding.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base material 2 Transfer layer 3 Release layer 4 Pattern layer 10 Transfer sheet 11 Upper chamber 12 Heater 13, 23 Vertical movement means 14, 24 Supply / exhaust port 15 Rubber-like elastic film 20 Transfer object 21 Lower chamber 22 Mounting stand 23 Exhaust hole 30 Vacuum press device 71 Die plate (movable plate) 72 Die plate (fixed plate) 73 Nozzle 74 Hydraulic cylinder 81 Female type 82 Male type 83 Molten resin

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI B32B 27/00 B32B 27/00

Claims (3)

[Claims] 1. A transfer sheet comprising an olefin-based thermoplastic elastomer film as a base material and a transfer layer on the base material as a transfer layer, the transfer sheet having at least a release layer and a picture layer. A chlorinated polyolefin resin as the second component resin in an amount of 1
A transfer sheet containing up to 30% by weight. 2. The transfer sheet according to claim 1 is pressed against and adhered to a transfer target by a pneumatic pressure and a contraction force of an elastic film by a vacuum press method, and then the base material of the transfer sheet is peeled off. A method for manufacturing a decorative member, comprising transferring a transfer layer to a transfer target. 3. In a state where the transfer sheet according to claim 1 is inserted between a pair of dies, the two dies are clamped by an injection molding simultaneous painting transfer method, and a melt is formed in a cavity formed by the two dies. After filling the resin and bringing the transfer sheet into close contact with the surface of the molded article at the same time as molding, both molds are opened, the base material of the transfer sheet is peeled off, and the transfer layer is transferred to the transfer object formed of the molded article. A method for manufacturing a decorative member.