JP2007030393A - Metallic tone decorated sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a metallic tone decorated sheet excellent in transparency and made by laminating and unifying a metal deposited film and a thermoplastic resin film in which a processing step for providing an adhesive layer is saved and its productivity is good and its manufacturing can be run more easily. <P>SOLUTION: The surface of the thermoplastic resin sheet is made from a polyester type resin, a polymethylmethacrylate resin or a polyurethane resin and the thermoplastic resin sheet and a metal layer of the metal deposited film are directly laminated and unified without an adhesive layer. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a metallic decorative sheet in which a metal vapor deposition film and a thermoplastic resin sheet are laminated and integrated.

2. Description of the Related Art Conventionally, plastic films and sheets having metallic luster have been used to provide metallic decorations on the surfaces of various products such as automobile interiors, furniture, building materials, and home appliances. For example, a metallic glossy sheet (Japanese Patent Laid-Open No. 2002-370311) obtained by laminating a metal vapor-deposited film on a thermoplastic resin film via an adhesive layer, or a surface film layer, an adhesive layer, a metal layer holding film layer having a metal layer, A metallic decorative sheet (JP 2004-001243 A) having an adhesive layer and a base film layer in this order.
JP-A-2002-370311 JP 2004-001243 A

  However, in the above prior art, the metal vapor-deposited surface and the thermoplastic resin surface are laminated via the adhesive layer, and after metal deposition on the film, the metal vapor-deposited surface or the thermoplastic resin surface is separated in a separate process. An adhesive layer has to be provided, which causes an increase in cost and causes a problem in productivity as the number of processes increases. In addition, when a transparent thermoplastic resin sheet is laminated on a metal vapor deposition film and the transparent sheet is used as the outside, there is a problem that the transparency of the transparent sheet is lowered because of the adhesive layer. It was.

  Therefore, an object of the present invention is to provide a metallic decorative sheet that omits the step of providing an adhesive layer, has high production efficiency, can be manufactured more easily, and is excellent in transparency.

  The present inventor has found that, when laminating a metal vapor-deposited film and a thermoplastic resin sheet, lamination can be integrated without an adhesive layer by selecting a specific thermoplastic resin. .

  That is, the present invention is a metal decoration sheet in which a metal vapor deposition film and a thermoplastic resin sheet are laminated and integrated, and the surface of the thermoplastic resin sheet is made of a polyester resin, a polymethyl methacrylate resin, or a polyurethane resin, The gist of the present invention is a metallic decorative sheet in which the metal layer of the metal vapor-deposited film and the thermoplastic resin sheet are directly laminated.

  As described above, the metallic decorative sheet of the present invention is a metal-deposited film, a thermoplastic resin sheet having a surface made of polyester resin, polymethyl methacrylate resin, or polyurethane resin, without an adhesive layer interposed therebetween. It is obtained by laminating and integrating, and since there is no need for a separate process for forming an adhesive layer between the resin layer and the metal layer as in the past, production efficiency is high and manufacturing is simpler. can do. Further, even in a laminate of a transparent thermoplastic resin sheet and a metal vapor-deposited film, the transparency of the transparent sheet does not deteriorate because the adhesive layer is not interposed.

  The thermoplastic resin sheet of the present invention requires a sheet having a surface made of polyester resin, polymethyl methacrylate resin, or polyurethane resin. This is because sheets made of these specific resins as raw materials can be directly laminated and integrated without using the metal layer of the metal vapor deposition film and the adhesive layer.

  Examples of the polyester-based resin include polyethylene terephthalate and polybutylene terephthalate. However, in consideration of secondary moldability and the like, a mixture of terephthalic acid and ethylene glycol and 1,4-cyclohexanedimethanol is used. Amorphous polyester (for example, “PETG” manufactured by Eastman Chemical Co.) is preferred.

  As the polymethyl methacrylate resin, one obtained by polymerizing a methyl methacrylate monomer or a mixture of this monomer with another monomer copolymerizable with this monomer by an emulsion polymerization method, a suspension polymerization method or the like is used.

 As urethane-based resins, those having a urethane bond (—NHCOO—) in the molecular structure and polymerized with a polyol (long chain diol) or a chain extender (short chain diol) and a diisocyanate are used. Among them, a thermoplastic elastic body synthesized using an equivalent amount of diol and diisocyanate is preferable.

  The thermoplastic resin sheet of the present invention needs to have a surface made of a polyester resin, polymethyl methacrylate resin, or urethane resin. This is because these resins can be laminated without using a metal layer of the metal vapor-deposited film and an adhesive. Accordingly, the thermoplastic resin sheet only needs to have a surface made of the above-mentioned resin on the surface to be laminated with the metal layer. For example, a sheet of polyester resin, polymethyl methacrylate resin, or urethane resin is formed by extrusion or the like. In addition to those obtained by forming the shape, a multilayer structure having the surface of these resins and having another resin layer on the inner surface may be used. This multilayer structure is produced by a method such as multilayer extrusion, thermal lamination, or coating.

  The metal-deposited film of the present invention is obtained by depositing a metal on a polyester film, an acrylic film, a polyurethane film or the like by a method such as vacuum deposition, sputtering, or ion plating. Examples of the metal to be deposited include aluminum, indium, tin, chromium, zinc, gallium, nickel, silver, gold, and alloys thereof. Indium, tin, alloys thereof, or aluminum is preferably used. This is because the adhesiveness with the polyester resin, polymethyl methacrylate resin, or urethane resin is high.

  The metallic decorative sheet of the present invention is obtained by laminating and integrating a metal vapor-deposited film and a thermoplastic resin sheet made of a polyester-based resin, a polymethyl methacrylate resin, or a urethane-based resin. For example, a method of manufacturing a thermoplastic resin sheet by extrusion molding, laminating a metal vapor deposition film directly on the extruded sheet, laminating offline using a laminator, and laminating using a press machine are adopted. Of course, various methods can be used for lamination as long as heat and pressurization are possible, regardless of these methods.

  When laminating, it is preferable to subject the surface of the thermoplastic resin sheet or the metal surface of the metal vapor-deposited film to corona discharge treatment, UV treatment, flame treatment (frame treatment), or plasma treatment in advance. This is because by performing these surface treatments, the adhesion between the thermoplastic resin sheet and the metal surface is significantly improved.

In order to describe the present invention more specifically, examples and comparative examples will be described below. The following were prepared as a metal vapor deposition film and a thermoplastic resin sheet.
<Metal vapor deposition film>
Polyester film (trade name “Teflex”, manufactured by Teijin DuPont Films, Inc., 25 μm thick) vacuum-deposited indium <Thermoplastic resin sheet>
(A) Polyester-based resin sheet: Amorphous polyester resin sheet, trade name “Pet Ace”, manufactured by Chuchu Plastic Industry Co., Ltd., thickness 2 mm
(B) Polymethylmethacrylate resin sheet: trade name “SUMIPEX”, manufactured by Sumitomo Chemical Co., Ltd., thickness 2 mm
(C) ABS resin sheet: trade name “Tough Ace”, manufactured by Chuchu Plastic Industry Co., Ltd., thickness 2 mm
(D) Polypropylene resin sheet: Trade name “Sanroid Polyproace”, manufactured by Chuchu Plastic Industry Co., Ltd., thickness 2 mm
(E) Vinyl chloride-based resin sheet: trade name “KAIDAC”, manufactured by Chuchu Plastic Industry Co., Ltd., thickness 2 mm
(F) Polycarbonate resin sheet: trade name “Polyca Ace”, manufactured by Chuchu Plastic Industry Co., Ltd., thickness 2 mm

<Examples 1-6, Comparative Examples 1-4>
About the thermoplastic resin sheets (A) to (F), test pieces having a size of 200 mm × 200 mm were prepared. This test piece was subjected to corona discharge treatment or UV treatment as shown in Tables 1 and 2. However, in the surface treatment in Table 1, “None” means that the surface treatment was not performed. In addition, the corona discharge treatment was performed from a position having a height of 18 mm from the surface of the test piece using a corona discharge treatment machine manufactured by Kasuga Electric Co., Ltd. The UV treatment was performed at 160 W / cm and a height from the sheet surface of 150 mm using a USHIO UV irradiator. Next, using a laminating machine (manufactured by Taisei Laminator Co., Ltd.), the test piece and the metal vapor deposition film were laminated so that the vapor deposition surface was on the test piece side. At this time, in the thermoplastic resin sheet (A), the roll temperature is 140 ° C. and the laminating speed is 0.4 m / min, and in the thermoplastic resin sheets (B) to (F), the roll temperature is 190 ° C. and the laminating speed is 0.2 m / min. In each case, the roll pressure was 0.49 MPa.

  The laminate obtained in this way is subjected to a 25th cross-cut peel test in accordance with JIS K5600-5-6 “General test method for paints”. As a thing, it evaluated as (circle) if it was (triangle | delta) and 0-3, and evaluated in case of complete peeling. The results are shown in Tables 1 and 2.

  Furthermore, the adhesiveness was confirmed by a tensile test for those evaluated as ○ or Δ in the cross-cut peel test. A test piece having a length of 100 mm and a width of 15 mm is prepared from the thermoplastic resin sheets (A) and (B) and a metal vapor-deposited film, the length is 20 mm and the width is 15 mm, and only the overlapped portion is laminated. When a non-laminated portion of a test piece having a length of 180 mm × width of 15 mm obtained in this manner was grasped and a tensile test was conducted in the shear direction using an autograph universal testing machine, no peeling was observed for all, and the deposited film was It broke.

<Example 7>
The same thermoplastic resin sheet (A) as in Example 2 and a metal vapor-deposited film were superposed with the vapor-deposited surface facing the sheet, and electrothermal pressing (temperature 140 ° C. for 5 minutes, pressure 2 MPa). The obtained laminate was subjected to the same cross-cut peel test as described above. Moreover, when the tensile test was done similarly, peeling was not seen but the vapor deposition film fractured | ruptured.

Claims (3)

  In a metal decorative sheet in which a metal vapor-deposited film and a thermoplastic resin sheet are laminated and integrated, the surface of the thermoplastic resin sheet is made of a polyester resin, a polymethyl methacrylate resin, or a polyurethane resin, and the metal of the metal vapor-deposited film A metallic decorative sheet, wherein a layer and the thermoplastic resin sheet are directly laminated.   The thermoplastic resin sheet or metal vapor deposition film is laminated and integrated with the thermoplastic resin sheet and the metal vapor deposition film after the metal surface of the thermoplastic resin sheet or metal vapor deposition film has been previously subjected to corona discharge treatment, UV treatment, flame treatment, or plasma treatment. The metallic decorative sheet according to claim 1.   The metal-decorated sheet according to claim 1 or 2, wherein the vapor-deposited metal of the metal vapor-deposited film is indium, tin, an alloy thereof, or aluminum.