JP2005343114A - Metallic tone decorative sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a decorative sheet toned with metallic gloss, which can be subjected to two-dimensional forming processings by lapping, vacuum forming, vacuum pressure forming or the like. <P>SOLUTION: The metallic tone decorative sheet uses a metal foil layer and is formed by equipping a synthetic resin base material sheet, a metal foil layer whose one surface is provided with a fine polish pattern, and a transparent synthetic resin layer consisting of an amorphous or crystalline polyester resin at least in this order, formed by equipping a weather resistant protective layer on the surface, and formed by equipping a transparent or translucent amorphous polyester resin layer or an adhesive agent layer between the above transparent synthetic resin layer and the metal foil layer. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a metallic glossy decorative sheet for use in building interiors and exteriors, furniture, vehicle interiors, home appliances, kitchen appliances, kitchen appliance doors, and the like, particularly lapping, vacuum forming, and vacuum / pressure forming. It is related with the metal-like decorative sheet which has the bend forming processability of an edge part by the above.

  Conventionally, there has been known a stainless steel laminate molded product in which a synthetic resin film is attached to one surface of a stainless steel foil and the synthetic resin surface is attached to an aluminum molded substrate. Although it was a high-grade one by sticking an expensive stainless steel foil to an aluminum base material compared to aluminum, the thickness of the stainless steel foil required about 50 to 100 μm, so that two-dimensional forming processing is difficult there were. (Patent Document 1).

  In addition, a polyethylene terephthalate resin sheet provided with an aluminum foil or an aluminum vapor deposition layer inside and embossed on the surface has been proposed by the present applicant, but the metal-like design and formability are not sufficient, There was a problem that the stain resistance was not good. (Patent Document 2).

In some cases, in-line processing was provided on the aluminum foil or aluminum vapor deposition layer, and a transparent synthetic resin layer was provided on the surface, but particularly when bending the end portion by lapping processing, vacuum forming processing, vacuum pressure forming processing, etc. There was a problem that the sheet was not suitable because of the return of the sheet. (Patent Document 3)
JP-A-6-91804 JP-A-8-216334 Japanese Utility Model Sho 61-37925

  The present invention has been made to solve the above-mentioned problems, and the object of the present invention is to provide a metallic glossy decorative sheet that can be subjected to two-dimensional forming by lapping, vacuum forming, vacuum / pressure forming, etc. There is to do.

  The present invention has been made to solve the above-mentioned problems, and the invention according to claim 1 is a metallic decorative sheet using a metal foil layer, comprising a synthetic resin base sheet and fine polishing on one side. A metallic decorative sheet comprising a patterned metal foil layer and a transparent synthetic resin layer made of a crystalline polyester resin in an amorphous state at least in this order.

  The invention according to claim 2 is the metallic decorative sheet according to claim 1, wherein a weatherproof protective layer is provided on the surface.

  The invention described in claim 3 is characterized in that a transparent or translucent amorphous polyester resin layer or adhesive layer is provided between the transparent synthetic resin layer and the metal foil layer. Item 2. A metallic decorative sheet according to Item 1.

  According to the invention described in claim 1, by providing a transparent synthetic resin layer made of a crystalline polyester resin in an amorphous state, a metallic decorative sheet having transparency and flexibility and excellent in two-dimensional forming processing is obtained. It becomes possible.

  Further, the invention according to claim 2 makes it possible to further enhance the weather resistance and contamination resistance of the surface.

  Further, according to the invention described in claim 3, by providing an amorphous polyester resin layer, the adhesion between the layers is strengthened, and another color tone is easily and stably maintained while maintaining the metallic luster. It becomes possible to grant.

  The metallic decorative sheet of the present invention will be described below in detail with reference to the drawings.

  FIG. 1 shows a cross-sectional structure of an embodiment of the metallic decorative sheet of the present invention. A transparent synthetic resin layer 10 made of a crystalline polyester resin in an amorphous state, an adhesive layer 20, an abrasive pattern 31, a metal foil layer 30, an adhesive layer 40, and a synthetic resin base sheet 50, which are transparent or A translucent amorphous polyester resin layer 60, a surface protective layer 11, a back primer layer 51, and the like may be provided.

  As the transparent synthetic resin layer 10 made of a crystalline polyester resin in an amorphous state in the present invention, polyester resins represented by polyethylene terephthalate, polybutylene terephthalate, polynaphthalene terephthalate, and the like can be used. From the viewpoint of transparency, polyethylene terephthalate resin is preferred. The thickness is preferably 25 to 100 μm in terms of surface smoothness and secondary processability. More preferably, 25-75 micrometers is preferable.

  As the adhesive layers 20 and 40 in the present invention, polyester, polyether, vinyl acetate, ethylene-vinyl acetate, polyurethane, epoxy, and the like can be used. The thickness is preferably about 2 to 100 μm. If the thickness is less than 2 μm, the unevenness of the polishing pattern to be described later cannot be sufficiently covered, which may cause defects in physical properties in design such as so-called air biting. Moreover, when coloring translucently, a well-known organic inorganic transparent pigment etc. can be used.

  As the metal foil layer 30 in the present invention, various metal foils such as an aluminum foil, a gold foil, a silver foil, a stainless steel foil, and an iron foil can be used. In particular, an aluminum foil is preferable in terms of economy and ease of processing. It is. The thickness is preferably about 5 μm to 200 μm. If the thickness is less than 5 μm, it becomes difficult to apply a polishing pattern described later. The surface of the aluminum foil is preferably subjected to various surface treatments in terms of discoloration and adhesiveness. Silane coupling treatment, boehmite treatment and the like are preferable.

  A polishing pattern 31 is provided on the upper or lower surface of the metal foil layer 30 in the present invention. This polishing pattern 31 is typified by a straight hairline pattern, a cross hairline pattern, a spin pattern, etc., and the surface of the metal foil 30 is polished with a brush roll, a rough surface roll, sandpaper, etc. for formation. To do. This polishing pattern is usually formed on the upper surface of the metal foil layer 31, but when the metal foil layer is as thin as about 5 μm to 20 μm, even if it is formed on the lower surface, the effect of unevenness generated during polishing is also applied to the upper surface. Appears, and the polishing pattern can be expressed to the extent that it is sufficiently visible from the top.

  As the surface protective layer 11, acrylates such as polyester acrylate, urethane acrylate, and epoxy acrylate, and methacrylates such as polyester methacrylate, urethane methacrylate, and epoxy methacrylate can be used as prepolymers and oligomers. Further, 1 μm to 10 μm is preferable in terms of scratch resistance and difficulty in bending cracking during two-dimensional molding. As a known photoinitiator, 1-hydroxy-cyclohexyl-phenyl-ketone, benzyldimethyl ketal and the like are preferable. An ultraviolet absorber or a light stabilizer may be added. In addition, there are tolylene diisocyanate (TDI), hexamethylene diisocyanate (HMDI), isophorone diisocyanate (IPDI), xylylene diisocyanate (XDI) as thermal reaction curing agents to give flexibility after curing, but weather resistance etc. In view of the above, HMDI is particularly desirable.

  In order to impart stain resistance, it is desirable to add a silicone oil having a reactive group. Various modified silicone oils are used, and modified silicone oils such as amino-modified, methacryl-modified, carboxyl-modified, carbinol-modified, epoxy-modified and alcohol-modified are desirable from the viewpoint of coating film adhesion and stain resistance. The addition of 0.1 to 5 parts by weight with respect to 100 parts by weight of the ionizing radiation curable resin as the main agent is desirable from the viewpoint of coating film adhesion and stain resistance. The coating thickness is preferably 5 to 10 μm from the viewpoint of scratch resistance, adhesion, and weather resistance.

  As the back primer layer 51, a two-component curable urethane resin system or the like can be used, and silica may be added from the viewpoint of adhesion and blocking prevention. As thickness, 1-10 micrometers is suitable at an adhesive point.

  As a transparent synthetic resin layer made of a crystalline polyester resin in an amorphous state, A-PET “NAGASE A-PET” (manufactured by Nagase Sangyo Co., Ltd.) having a thickness of 60 μm is used. PET-G colored in light gray with a transparent pigment having a thickness of 140 μm as a polyester resin layer was dry laminated at room temperature.

  Next, as the adhesive layer, a two-component cured urethane resin adhesive is applied so that the coating amount after drying is 10 μm, and after drying, the metal foil layer is subjected to hairline processing during rolling and then treated with a silane coupling agent. The aluminum foil was dry laminated with this.

  Next, a two-component curable urethane resin-based back primer is dried on the back surface of the colored polypropylene resin substrate layer, dried and applied to a thickness of 1.5 μm, and further on the printed surface, a two-component curable urethane resin having a thickness of 8 μm after drying. The metal foil decorative sheet of the present invention was produced by dry lamination with the aluminum foil surface with an adhesive. The obtained sheet became a metallic decorative sheet having transparency and flexibility and excellent in two-dimensional forming.

  The metal-like decorative sheet of the present invention can be two-dimensionally formed as a stainless steel-like metal-like decorative sheet that is suitably used for kitchen appliances, kitchen appliance doors, and the like.

It is explanatory drawing which shows the structure of the cross section of one Example of the metallic glossy decorative sheet of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Transparent synthetic resin layer which consists of crystalline polyester resin in an amorphous state 20 ... Adhesive layer 30 ... Metal foil layer 31 ... Polishing pattern 40 ... Adhesive layer 50 ... Synthetic resin layer 60 ... Transparent or semi-transparent amorphous Polyester resin layer 11 ... surface protective layer 51 ... back primer layer

Claims (3)

  A metallic decorative sheet using a metal foil layer, a synthetic resin base sheet, a metal foil layer provided with a fine polishing pattern on one side, a transparent synthetic resin layer made of a crystalline polyester resin in an amorphous state A metallic decorative sheet characterized by being provided at least in this order.   2. The metallic decorative sheet according to claim 1, wherein a weatherproof protective layer is provided on the surface.   The metallic decorative sheet according to claim 1, wherein a transparent or translucent amorphous polyester resin layer or an adhesive layer is provided between the transparent synthetic resin layer and the metal foil layer.

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