JP2005169740A - Metal like decorative film having hairlines - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a metal like decorative film having hairlines prevented from the peeling of the polyester film in a final product from a metal vapor deposition layer, not damaged in molding processability and excellent in fingerprint resistance, damage resistance and hairline design properties. <P>SOLUTION: This metal like decorative film is constituted by applying hairline processing to one side of the polyester film, providing the metal vapor deposition layer on the hairline processing surface of the polyester and providing a thermoplastic resin film on the surface of the metal vapor depostion layer. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a metallic decorative film having a hairline. More specifically, the present invention relates to a metallic decorative film having a hairline, which is laminated on the surface of an existing steel plate and plywood and used for a refrigerator surface material, a furniture surface material, and the like.

  Conventionally, laminated decorative films have been widely used by being bonded to metal (steel) or wood (plywood) materials such as refrigerators, washing machines, air conditioners, furniture, cabinets, joinery, and cupboards.

  In recent years, stainless steel plates have come to be widely used for home appliances because of their high design. However, stainless steel plates are hard and require special jigs and dies when forming, and there is a drawback that the conventional forming jigs, dies, and processing methods cannot be used as they are. . Further, the surface of the stainless steel plate is also likely to have fingerprints, and there is a drawback that the appearance is remarkably deteriorated at a part where a human hand frequently touches.

  As an alternative material, a polyester film that has been subjected to hairline processing and aluminum vapor deposition and laminated on the surface of an iron plate or plywood has been used. As such a conventional decorative sheet, there is a film obtained by dry laminating the aluminum vapor-deposited surface of a plastic film (A) having an aluminum vapor-deposited layer on one side and a hairline process on the other side ( For example, see Patent Document 1). It is laminated on the surface of a steel plate, has an aluminum metallic luster, and is excellent in boiling water resistance.

  As another decorative sheet, a thin film aluminum vapor deposition layer having a light transmittance of 5 to 50% is formed on the base film, and a black ink layer and an adhesive layer having a lightness of 0 to 50 are formed thereon. A chrome glossy half-deposited film characterized by being sequentially formed is known (for example, see Patent Document 2). It is possible to obtain a chrome luster that is resistant to bending and easily changes in color tone at low cost by laminating an aluminum vapor-deposited layer having a specific light transmittance and a black ink layer having a specific lightness to form a composite color. .

  However, with conventional films, the difficulty of processing stainless steel can be solved, but the problem of fingerprint resistance still remains. Moreover, there exists a problem that a polyester film tends to peel in a metal vapor deposition layer in a final product. Furthermore, when the hairline processing surface of the aluminum vapor-deposited plastic film is on the side opposite to the aluminum vapor-deposited surface, that is, when the hairline surface is in contact with the top coat layer on the upper side, there is a problem that the scratch resistance and the hairline design are impaired. is there.

JP-A-11-34223 Japanese Patent Laid-Open No. 10-329496

  An object of the present invention is to provide a metal-like decorative film having a hairline that is excellent in fingerprint resistance, scratch resistance, and hairline design without causing the polyester film in the final product to peel off and impairing the molding processability. That is.

That is, the present invention is characterized in that (1) one side of a polyester film is subjected to hairline processing, a metal vapor deposition layer is provided on the hairline processing surface, and a thermoplastic resin film is provided on the metal vapor deposition surface. (2) The decorative film according to (1) above, wherein an anchor coat layer and a top coat layer are sequentially provided on a non-hairlined surface of the polyester film, 3) The polyester film has a thickness of 10 to 25 μm, the decorative film according to (1) or (2), and (4) the topcoat layer is matte (2) Or (3) a decorative film, (5) a matting agent is added to the topcoat layer in an amount of 0.5 to 10% by weight of the entire topcoat layer. An ultraviolet absorber is added to at least one of the decorative film according to any one of the above (2) to (4), (6) the anchor coat layer, and the top coat layer. The decorative film according to any one of the above (2) to (5), (7) When the film is irradiated for 50 hours under the conditions of JIS K 7350-4 using a sunshine weatherometer, there is no peeling of the coating film in the cello tape peeling test. (2) to (7), wherein a colorant is added to at least one of the decorative film of (6) above and (8) the anchor coat layer and the topcoat layer. Any one of these decorative films.

  The decorative film of the present invention is a metallic decorative film having a hairline, and has excellent fingerprint resistance and scratch resistance without peeling off the metal film of the polyester film in the final product and without impairing the molding processability. Adhesiveness and hairline design.

  Hereinafter, the present invention will be described in more detail with reference to the drawings. FIG. 1 is a cross-sectional view showing an example of a metallic decorative film having a hairline according to the present invention. In FIG. 1, 1 is a polyester film having a hairline processed on one side (lower side), 2 is a metal deposition layer, 3 is an adhesive layer, 4 is a thermoplastic resin film, 5 is an anchor coat layer, and 6 is a top coat. Shows the layer.

  The polyester film 1 in the decorative film of the present invention is one in which hairline processing is performed on one side with a sandpaper, a metal brush or the like. The polyester film 1 preferably has a thickness of 10 to 25 μm, more preferably 12 to 23 μm, and still more preferably 15 to 20 μm. If the thickness is less than 10 μm, the film itself is not elastic, so the density and depth of the hairline vary and stable hairline processing cannot be performed. On the other hand, if it exceeds 25 μm, the waist of the polyester film itself comes out, so that the polyester film tends to be peeled off by the metal vapor deposition layer when it becomes a final product. As the polyester, a biaxially stretched polyethylene terephthalate film, a biaxially stretched copolymer polyethylene terephthalate film, a biaxially stretched polyethylene naphthalate film, or the like can be used.

The metal vapor deposition layer 2 is provided on the hairline processed surface of the polyester film 1. By providing a metal vapor deposition layer on the hairline processed surface, there is an advantage that the scratch resistance is improved and the hairline design property is not impaired. That is, since the upper decorative film surface becomes flat when the hairline processed surface comes to the lower side of the polyester film, the scratch resistance is improved. In addition, since the hairline surface comes under the polyester film, even if an anchor coat layer and a topcoat layer are further provided on the upper side, the hairline does not come into contact with the coating agent, so the groove of the hairline is filled with the coating agent. The hairline looks sharp and the hairline design is not impaired. Formation of a metal vapor deposition layer can be suitably selected from PVD methods, such as a well-known vacuum vapor deposition method, sputtering method, and ion plating method. It is preferable to adjust the film thickness of the metal vapor deposition layer 2 so that the light transmittance is 50% or less. If it exceeds 50%, the color tone of the thermoplastic resin film 4 described below appears on the surface, and the effect of expressing the metallic tone, which is the object, is inferior. The metal for forming the metal vapor deposition layer 2 is not particularly limited, and examples thereof include metals such as aluminum, chromium, nickel, titanium, stainless steel, tin, copper, silver, gold, and zinc sulfide, metal alloys, and metal compounds. . Among these, aluminum is particularly suitable from the balance of easiness of vapor deposition, economy, and design.

  The thermoplastic resin film 4 provided as a base material on the metal vapor-deposited surface is translucent to opaque and is made of polyvinyl chloride, polyolefin, polyester, polystyrene, ethylene-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer. Select from polymer, ethylene / acrylic acid copolymer, ethylene / acrylic acid ester copolymer, ionomer, polyacrylic acid ester, polymethacrylic acid ester, ABS resin, nylon, polycarbonate, cellulose triacetate, etc. it can. The thickness of the thermoplastic resin film 4 is preferably 30 μm to 1 mm. If the thickness is less than 30 μm, the problem that wrinkles are likely to occur in the laminating process tends to occur, and if the thickness exceeds 1 mm, problems such as difficulty in cutting occur. Of these, from the viewpoint of processability, ease of coloring, and surface hardness as a decorative film, a polyvinyl chloride film containing 3 to 40% by weight of a plasticizer, a polyolefin film, or a completely amorphous polyester film is preferable. used. In particular, the polyester film is preferably an amorphous film composed of two or more kinds of diol components. Furthermore, the dicarboxylic acid component is terephthalic acid, and the composition of the diol component is When ethylene glycol is 50 to 99 mol% (more preferably 60 to 80 mol%) and 1,4-cyclohexanedimethanol 1 to 50 mol% (more preferably 20 to 40 mol%), either for plywood or for steel plate Even if it is used, it is more preferable because the above-described effect is remarkably improved.

The thermoplastic resin film 4 is provided on the metal vapor deposition layer 2 via the adhesive layer 3. Although it depends on the type of thermoplastic resin, an adhesive that can be used for ordinary dry lamination can be applied. That is, an alkyd resin having a hydroxyl group (—OH), an acrylic polyol, a polyester polyol, a polyether polyol, a cellulose derivative resin and the like, a polyisocyanate resin having an isocyanate group (—NCO), tolylene diisocyanate, methylene diisocyanate, hexamethylene Diisocyanate and the like can be arbitrarily mixed and used. The adhesion application amount is about ² to 10 g / m ² as in normal dry lamination, and direct gravure coating, reverse coating, reverse gravure coating, etc. are used as the application method.

  In the decorative film of the present invention, the anchor coat layer 5 and the top coat layer 6 may be sequentially provided on the surface of the polyester film 1 that is not subjected to the hairline processing. The anchor coat layer 5 can assist the adhesion between the polyester film 1 and the top coat layer 6 and can be decorated by adding a colorant and / or adding weather resistance by adding an ultraviolet absorber. is there. As for the thickness of the anchor coat layer, a thickness of about 0.1 to 5 μm after drying is sufficient for the purpose of simply assisting the adhesion of the top coat layer, but 2 μm when coloring or considering weather resistance. The above thickness is required. As the anchor coat layer, alkyd resin having hydroxyl group (—OH), acrylic polyol, polyester polyol, polyether polyol, cellulose derivative resin, polyisocyanate resin having isocyanate group (—NCO), tolylene diisocyanate, methylene diisocyanate , Hexamethylene diisocyanate and the like can be arbitrarily mixed and used. As the coating method of the anchor coat layer 5, is selected from direct gravure coating, reverse gravure coating, knife coating, Mayer bar coating, reverse roll coating and the like.

As the colorant that can be added to the anchor coat layer 5, known color pigments such as isoindolinone, titanium yellow, and quinacridone are used, and an appropriate amount is used in consideration of transparency. It is also possible to add luster pigments such as metal powders such as aluminum and scaly powders such as titanium oxide and shell mica. When a colorant is added, the amount is usually 1 to 5% by weight of the entire anchor coat layer 5.

Moreover, as an ultraviolet absorber, a benzophenone type, a salicylate type, a benzotriazole type, an acrylonitrile type, a metal complex type, a hindered amine type, etc. can be used. Among these, a benzotriazole type can be preferably used. By adding a UV absorber, the coating film does not peel off in the cellophane peeling test when irradiated for 50 hours under the conditions of JIS K 7350-4 using a sunshine weatherometer described in the section of the test method below. A decorative film is obtained. Furthermore, by selecting a UV absorber having a high UV absorbing effect (for example, benzotriazole) and adding a certain amount thereof, irradiation is performed for 2000 hours under the conditions of JIS K 7350-4 using a sunshine weatherometer. Even when it was done, it was found that peeling of the coating film was not observed in the cello tape peeling test. Since the decorative film of the present invention is mainly intended for indoor use, it can be used as long as it can withstand irradiation for 50 hours, but it can be used for outdoor applications by withstanding irradiation for 2000 hours. Become.

  The top coat layer 6 provided on the anchor coat layer 5 is transparent or color transparent. Preferably, the top coat layer 6 is matte, and a paint whose surface gloss value measured using a 60 ° gloss meter is adjusted to 1 to 200%, preferably 20 to 180% according to JISK7105 is optional. It is formed by applying using a vehicle. As the vehicle used in the coating material, one or a mixture of two or more resins such as acrylic resin, polyurethane resin, polyester resin, epoxy resin, and phenol resin can be used. Further, an electron beam or an ultraviolet curable resin can also be used as a paint for forming the top coat layer 6. The electron beam or ultraviolet curable resin preferably has an acrylic group or a methacryl group at the molecular end, and examples thereof include urethane acrylate, polyester acrylate, epoxy acrylate, urethane methacrylate, polyester methacrylate, and epoxy methacrylate. Adjustment of the surface gloss in the paint is preferably performed by dispersing an appropriate amount of a matting agent in the paint. When the top coat layer 6 contains a matting agent, the fingerprint resistance of the resulting decorative film can be obtained. As the matting agent, silica, mica, alumina, calcium carbonate, diatomaceous earth, or the like is used. Furthermore, waxes such as polyethylene wax, silicone or the like may be added to impart surface slipperiness. Polyethylene wax is also effective as a matting agent. When the matting agent is added, the addition amount is 0.5 to 10% by weight of the entire coating material forming the top coat layer 6, more preferably 1 to 8% by weight, and further preferably 2 to 5% by weight. %. When the addition amount of the matting agent is 10% by weight or more, there is a problem that dispersibility is poor at the time of production. Moreover, the effect of fingerprint resistance is small when it is 0.5% by weight or less. As the coating method of the top coat layer 6, direct gravure coating, reverse gravure coating, knife coating, Mayer bar coating, reverse roll coating, and the like are used.

  The topcoat layer 6 can also be added with a colorant and / or an ultraviolet absorber, if desired, as described above with respect to the anchor coat layer 5.

  The decorative film of the present invention thus obtained is laminated on the surface of an existing steel plate or plywood using a normal adhesive.

  Hereinafter, the present invention will be further described with reference to Examples and Comparative Examples.

15 μm polyethylene terephthalate film 1 (biaxially stretched polyethylene terephthalate film, trade name: Diafoil KHX-3, manufactured by Mitsubishi Chemical Polyester Film) was subjected to hairline processing, and the light transmission measured on the hairline processed surface in accordance with JISK7105 The aluminum vapor deposition layer 2 is provided so that the rate is 5%, and the adhesive is provided on the aluminum vapor deposition surface so as to have a thickness of 4 μm after drying with a direct gravure coater, and 100 μm polychlorinated as a colored thermoplastic resin film 4 Dry lamination was performed with a vinyl film (BS12K Fc65234: manufactured by Riken Technos). Furthermore, a colorant 1 is added to 85.4% by weight of a polyester polyol-based paint (solid content 27.5% by weight) containing toluene as a main solvent by a gravure coater on the smooth surface (the surface not subjected to hairline processing) of the polyethylene terephthalate film 1. 1.9 wt%, UV absorber 8.8 wt%, polyisocyanate curing agent 3.9 wt% mixed paint was applied after drying to a thickness of 5 μm (anchor coat layer 5), and toluene was added. Polyurethane acrylate paint as a main solvent (solid content 68.0 wt%) 86.2 wt%, polyethylene wax 1.2 wt%, silica as matting agent 2.2 wt%, and polyisocyanate curing agent 10 Apply a 4 wt% mixed paint with a gravure coater to a thickness of 4 μm after drying, and cure the coating with a UV irradiation device. (Topcoat layer 6) A metallic decorative film having a hairline was obtained.

A hot-dip galvanized 0.5 mm thick steel sheet was coated with 5 g / m ² of an acrylic adhesive (SC457: manufactured by Sony Chemical Co.) using a roll coater to provide an adhesive layer, and the steel sheet was heated at 230 ° C. for 3 minutes. Thereafter, the thermoplastic resin surface of the decorative film obtained above was pressure-bonded to the adhesive layer of the steel plate with a rubber roll and then rapidly cooled with cooling water to obtain a metal decorative plate. The obtained metal decorative board was subjected to the following test. The results are shown in Table 1.

Test methods and evaluation criteria are as follows.
(1) Observe the scratched state of the surface when the scratch-resistant decorative surface is rubbed with a polo cloth, and judge according to the following criteria.
○: No scratch on the surface.
X: There is a scratch on the surface.
(2) The design of the hairline on the decorative surface of the hairline is determined according to the following criteria.
○: The shape of the hairline is clear.
X: The shape of the hairline is blurred.
(3) Workability: The bendable decorative surface is folded 180 ° outwardly (0T bend measurement method) and the state such as cracks is observed and judged according to the following criteria.
○: No abnormality.
X: Cracking occurred.
(4) Workability: Eriksen test (JIS K 6744)
A cut is made on the decorative sheet side with a knife in a 5 mm wide # -type, extruded 6 mm from the back side, observed for the presence or absence of peeling from the polyester film layer, and determined according to the following criteria.
○: There is no peeling of the polyester film layer.
Δ: Some peeling of the polyester film layer is observed.
X: The peeling of the polyester film layer is large.
(5) A fingerprint is applied to the anti-fingerprint surface to observe its conspicuousness, and it is judged according to the following criteria.
A: Fingerprints are hardly noticeable.
○: The fingerprint is slightly inconspicuous.
Δ: Fingerprints are slightly noticeable.
X: Fingerprints are easily noticeable.
(6) A cellophane peeling test is performed on a sample when irradiated with a weather-resistant sunshine weather meter [Suga Test Instruments Co., Ltd., model name: S300] for 50 hours under the conditions of JIS K 7350-4, and the sample is determined according to the following criteria. In the cello tape peel test, the polyester film is cross-cut from the decorative surface with an NT cutter, and the cellophane tape is peeled at high speed using a 25 mm wide cellophane tape made by Nichiban, and the coating film (top coat layer, anchor coat layer, polyester film layer) ) Is observed for peeling.
○: There is no peeling of the coating film.
Δ: Some peeling of the coating film is observed.
*: Peeling of a coating film is large.
(7) Workability: A V-shaped groove that reaches the interface between the plywood and the adhesive layer is cut on the opposite side of the V-cut decorative sheet, and the ethylene / vinyl acetate copolymer emulsion is adhered in the groove. By applying the agent and bending the plywood at an angle of 90 ° so as to close the groove, sheet breakage / cracking at the time of V-cut is observed, and determination is made according to the following criteria.
○: No abnormality ×: Cracking occurred

As the top coat layer 6, a polyurethane acrylate paint (solid content: 68.0 wt%) containing toluene as a main solvent, 89.3% by weight, 0.3 wt% silica as a matting agent, and a polyisocyanate hardener 10 A metal decorative board was obtained in the same manner as in Example 1 except that the paint mixed with 4% by weight was used. The obtained metal decorative board was subjected to the same test as in Example 1. The results are shown in Table 1.

As the anchor coat layer 5, 1.9% by weight of a colorant and 3.9% by weight of a polyisocyanate-based curing agent are added to 94.2% by weight of a polyester polyol-based paint (solid content 27.5% by weight) containing toluene as a main solvent. A metal decorative board was obtained in the same manner as in Example 1 except that the mixed paint was used. The obtained metal decorative board was subjected to the same test as in Example 1. The results are shown in Table 1.

Comparative Example 1
15 μm polyethylene terephthalate film 1 (biaxially stretched polyethylene terephthalate film, trade name: Diafoil KHX-3, manufactured by Mitsubishi Chemical Polyester Film) is subjected to hairline processing and measured according to JISK7105 on the opposite side to the hairline processed surface. The metal decorative board was obtained in the same manner as in Example 1 except that the aluminum vapor-deposited layer 2 was provided so that the light transmittance was 5% and the anchor coat layer 5 and the top coat layer 6 were sequentially applied to the hairline processed surface. It was. The obtained metal decorative board was subjected to the same test as in Example 1. The results are shown in Table 1.

A metal decorative board was obtained in the same manner as in Example 1 except that the anchor coat layer and the top coat layer were not applied. The obtained metal decorative board was subjected to the same test as in Example 1. The results are shown in Table 1.

A metal decorative board is obtained in the same manner as in Example 1 except that a 38 μm-thick polyester film (biaxially stretched polyethylene terephthalate film, trade name: Teijin Tetron Film / S type, manufactured by Teijin DuPont Film) is used as the polyester film 1. It was. The obtained metal decorative board was subjected to the same test as in Example 1. The results are shown in Table 1.

A metallic decorative sheet having a hairline was obtained in the same manner as in Example 1 except that a 250 μm completely amorphous polyester film (Rivester CL001-250: manufactured by Riken Technos) was used as the thermoplastic resin film 4. An adhesive (Konishi CVC36, urethane-modified vinyl emulsion) was applied to a medium density fiberboard (MDF: 15 mm thickness), and the decorative sheet obtained above was bonded to obtain a decorative board. The obtained decorative board was subjected to the same test as in Example 1. The results are shown in Table 2.

Comparative Example 2
A metallic decorative sheet having a hairline was obtained in the same manner as in Comparative Example 1 except that a 250 μm completely amorphous polyester film (Rivester CL001-250: manufactured by Riken Technos) was used as the thermoplastic resin film 4. The decorative sheet was bonded in the same manner as in Example 6 to obtain a decorative board. The obtained decorative board was subjected to the same test as in Example 1. The results are shown in Table 2.

A decorative board was obtained in the same manner as in Example 6 except that the anchor coat layer and the top coat layer were not applied. The obtained decorative board was subjected to the same test as in Example 1. The results are shown in Table 2.

It is sectional drawing of the metallic tone decorative film which has a hairline of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Polyester film which gave hairline processing to the lower side 2 Metal vapor deposition layer 3 Adhesive layer 4 Thermoplastic resin film 5 Anchor coat layer 6 Top coat layer

Claims (8)

A metal-like decorative film having a hairline, wherein a hairline process is applied to one side of a polyester film, a metal vapor-deposited layer is provided on the hairline-processed surface, and a thermoplastic resin film is provided on the metal vapor-deposited surface . 2. The decorative film according to claim 1, wherein an anchor coat layer and a top coat layer are sequentially provided on the surface of the polyester film which is not subjected to hairline processing. The decorative film according to claim 1 or 2, wherein the polyester film has a thickness of 10 to 25 µm.   4. The decorative film according to claim 2, wherein the top coat layer is matte. The matte film according to any one of claims 2 to 4, wherein a matting agent is added to the topcoat layer in an amount of 0.5 to 10% by weight of the entire topcoat layer. 6. The decorative film according to any one of claims 2 to 5, wherein an ultraviolet absorber is added to at least one of the anchor coat layer and the top coat layer. The decorative film according to claim 6, wherein the film is not peeled off in the cellophane peeling test when irradiated with a sunshine weatherometer under the conditions of JIS K 7350-4 for 50 hours. The decorative film according to any one of claims 2 to 7, wherein a colorant is added to at least one of the anchor coat layer and the top coat layer.

Images