JP2571401B2 - Metallic gloss sheet with excellent moldability - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a metallic glossy sheet having excellent moldability, and more particularly, to an excellent moldability suitable for use in molding automobile moldings, building materials, labels and the like. Related to metallic glossy sheets.

[Prior Art] Conventionally, metallic luster sheets of this type include, for example, fluororesin films / metal deposition layers / adhesive layers / polyvinyl chloride sheets, and fluororesin films / There is known a metallic glossy sheet having a structure of an adhesive layer / polyethylene terephthalate film / metal deposition layer / adhesive layer / polyvinyl chloride sheet.

However, in the case of the above metallic glossy sheet having the structure described above, the metallized sheet is directly deposited on the fluororesin film itself, and the polyvinyl chloride sheet is further laminated via an adhesive. Since the metallic luster is blurred or lost, the production yield is poor and mass productivity is lacking. This is due to uneven thickness, sagging, lack of waist, and easy stretching of the fluororesin film. On the other hand, in the case of the composition of the above, the metal is vapor-deposited on the polyethylene terephthalate film, and further bonded to the polyvinyl chloride sheet via the adhesive, but the fluororesin film is bonded to the polyethylene terephthalate film side via the adhesive. The metal luster does not blur or disappear during the processing process, but the polyethylene terephthalate film is in the constituent layers, so it is strong and wrinkled in a curved molding and the appearance is poor, making it impractical etc. Each had its own problems.

[Object of the Invention] In view of the above conventional problems, the present invention provides a metallic glossy sheet having excellent moldability according to the present invention, in which the metallic gloss is blurred or disappears during the processing step, the production yield is poor, and the mass productivity is lacking. It eliminates all problems such as stiffness, wrinkles and poor appearance in curved malls, and high production yield without mass loss or loss of metal luster during the processing process. Even with curved moldings, wrinkles are not formed and the appearance is good, and the temporary support film is finally peeled with an adhesive layer that can peel off scratches and dirt during the processing process, so molded products with no scratches on the surface It is an object of the present invention to provide a metallic glossy sheet having excellent moldability such that a high gloss can be obtained.

[Effects of the Invention] That is, the present invention is such that a temporary support film is bonded to the surface of a fluororesin film via a peelable adhesive layer, and at least a metal deposition layer is formed on the back surface of the fluororesin film.
The present invention relates to a metallic luster sheet having excellent moldability, characterized by sequentially forming an adhesive layer and a polyvinyl chloride sheet.

That is, in the metal luster sheet having excellent moldability of the present invention, the conventional metallization is performed directly on the fluororesin film itself which is poor in workability such as uneven thickness, sagging, lack of stiffness, easy elongation, etc. In the present invention, instead of laminating a temporary supporting film to the surface of a fluororesin film through a peelable adhesive layer, the fluororesin A metal deposition layer, adhesive layer, and polyvinyl chloride sheet are sequentially formed on the back side of the film, so the production yield is good without blurring or disappearing of the metal luster during the processing process. The temporary support film is finally peeled off together with the adhesive layer that can peel off scratches and dirt during the processing process, so that there is no scratch on the surface at all. And it completed the formability excellent metallic luster sheet that molded products will be obtained. In addition, even in the metallic luster sheet having excellent moldability of the present invention, the uneven surface is partially or entirely formed by embossing, hair line processing, spin processing, sand blast processing, sputter etching processing, etc. as a fluororesin film by a conventionally known technique. Can be applied.

That is, in the present invention, the temporary support film (6) is bonded to the front surface of the fluororesin film (1) via the peelable adhesive layer (5), and at least the back surface of the fluororesin film (1) By forming the metal deposition layer (2), the adhesive layer (3), and the polyvinyl chloride sheet (4) sequentially, extremely good properties, that is, the production yield without blurring or disappearing of the metal luster during the processing process It has good mass productivity, good appearance with no wrinkles even on curved moldings, and the temporary support film is finally released together with an adhesive layer that can peel off scratches and dirt during the processing process. An object of the present invention is to provide a metallic glossy sheet having excellent moldability such that a molded article having no scratch on the surface is obtained.

As the fluororesin film (1) in the metallic glossy sheet having excellent formability of the present invention, any one having a certain degree of self-holding property can be used. For example, polyfluoroethylene resins, polychlorotrifluoroethylene Film-like or sheet-like materials such as resin-based resins, polyvinylidene fluoride-based resins, polyvinyl fluoride-based resins, and tetrafluoroethylene-ethylene copolymer resins are appropriately used.

In particular, the fluororesin-based film (1) is a film-like material of the above-mentioned resins and is not limited in its thickness.
~ 100μm is good to use, especially 50 ~ 75μ
Those having a thickness of m are preferred from the viewpoint of durability, handleability, economy and the like.

Further, the fluororesin film (1) may be one in which a hairline process, a mat process or the like is applied to both front and back surfaces or any one of them. The fluororesin film (1) may be pre-printed with a desired character pattern or the like on both the front and back surfaces or on either of them.

The releasable adhesive layer (5) of the metallic glossy sheet of the present invention having excellent moldability has releasability for the fluororesin film (1) and also for the temporary support film (6). Excellent adhesion is required. Adhesives satisfying such requirements include starch-based, polyvinyl alcohol-based rewetting paste, polyethylene-based resin, polyamide-based resin, polyester-based resin, polybutyral-based resin, polyvinyl acetate-based resin, cellulose-based resin, and polymethyl resin. Methacrylate resin, polyvinyl ether resin, polycarbonate resin, ethylene-vinyl acetate copolymer, chlorinated polypropylene resin, vinyl chloride-vinyl acetate copolymer, acrylic resin, acryl-vinyl chloride-vinyl acetate copolymer, Solvent-type adhesives or emulsion-type adhesives, such as natural rubber and artificial rubber, which are used alone or in the form of Brent, are used. The peelable adhesive layer (5) is formed by applying an adhesive solution for forming the adhesive layer by a usual coating method such as a roll coating method, a gravure coating method, a reverse coating method, and a spray coating method. The drying may be performed, or the polyethylene resin or the like may be formed by an extrusion melting method. The thickness of the peelable adhesive layer (5) is not limited, but is usually in the range of 10 to 75 μm, more preferably 40 to 75 μm.
It is selected from the range of 60 μm. If the thickness of the adhesive is less than 10 μm, it is not preferable because sufficient adhesive strength cannot be obtained even for the temporary support film (6). On the other hand, when the thickness exceeds 75 μm, the solvent is likely to remain, and the peelable adhesive layer (5) is fluidized in various processing steps to be performed.

In the specification of the present application, the peelable adhesive means ordinary glue such as a re-wet adhesive (re-wet adhesive), a heat-sensitive adhesive, a pressure-sensitive adhesive (adhesive), an adhesive, an adhesive, and the like.

As the temporary supporting film (6) in the metallic luster sheet having excellent moldability of the present invention, any one having sufficient self-holding properties can be used. For example, polyester resin, polyamide resin, polyamideimide resin Resins such as polypropylene resin, cellulose acetate resin, polycarbonate resin, and polyvinyl chloride resin, and film or sheet materials such as cellophane paper are appropriately used.

Particularly, the temporary support film (6) is a film-like material of the above-mentioned resins and the thickness thereof is not limited, but the thickness is 12 to 50 μm.
It is preferable to use those having a diameter of about m from the viewpoint of workability during the post-processing and economy.

The metal-deposited layer (2) of the metallic glossy sheet having excellent moldability according to the present invention may be, for example, aluminum, zinc, gallium, indium, nickel, tin, silver, gold, copper, silicon, chromium,
It is obtained by vapor-depositing a metal such as titanium, platinum, palladium, nickel-chromium, stainless steel, hastelloy, or a simple substance, a mixture, or an alloy. The thickness of the metal deposition layer (2) depends on the type of metal, but is usually 20 to
It is selected from a range of about 60 nm. In the case of aluminum, if the thickness is less than 20 nm, the metallic luster is not sufficient, while if it is more than 60 nm, the metallic luster does not change, which is inferior in economical efficiency.

In the present specification, the term “evaporation” means that a thin film of a metal or the like is formed by a thin film forming method of a normal metal or the like (including an alloy and a metal compound, the same applies hereinafter) such as a vacuum evaporation method, a sputtering method, and an ion plating method. I do.

The metal deposition layer and the metal thin film deposition layer include all of the metal thin films formed by these metal thin film formation methods.

The adhesive layer (3) of the metallic glossy sheet having excellent moldability of the present invention is required to have excellent adhesion to the metal vapor-deposited layer (2) and the polyvinyl chloride sheet. Adhesives satisfying such requirements include polyethylene resins, polyamide resins, polyester resins, polybutyral resins, polyvinyl acetate resins, cellulose resins, polyvinyl alcohol resins, polymethyl methacrylate resins, and polyvinyl ether resins. , Polycarbonate resin, ethylene-vinyl acetate copolymer, chlorinated polypropylene resin, vinyl chloride-vinyl acetate copolymer, acrylic resin, acryl-vinyl chloride-vinyl acetate copolymer, natural rubber, artificial rubber, etc. Alternatively, a solvent type adhesive or an emulsion type adhesive of a blend is used. The formation of the adhesive layer (3) is performed by applying an adhesive solution for forming the adhesive layer by ordinary coating such as a roll coating method, a gravure coating method, a reverse coating method, and a spray coating method, and drying. Done by The thickness of the adhesive layer (3) is not particularly limited, but is usually selected from the range of 1 to 10 μm, more preferably the range of 2 to 4 μm. Adhesive thickness is 1μ
If it is less than m, sufficient adhesive strength cannot be obtained, which is not preferable. On the other hand, if the thickness exceeds 10 μm, the solvent is likely to remain and the adhesive layer (3) is fluidized in various subsequent steps with the fluidization of the adhesive layer.

In the specification of the present application, the term "adhesive" means an ordinary glue such as a re-wet adhesive (re-wet glue), a heat-sensitive adhesive, a pressure-sensitive adhesive (adhesive), an adhesive, an adhesive, and the like.

The polyvinyl chloride sheet (4) in the metallic gloss sheet having excellent moldability of the present invention is not particularly limited as long as it has a sufficient self-holding property. For example, in order to further enhance the metallic gloss. Usually, a film or sheet of a polyvinyl chloride resin such as a black or gray pigment kneaded type is appropriately used.

In particular, as the polyvinyl chloride sheet (4), a film-like or sheet-like material of the above-mentioned resins is not limited, but a thickness of about 100 to 500 μm is used. 100
When the thickness is less than μm, the overall rigidity is weak and there are problems such as wrinkles and kinks during molding, and when it exceeds 500 μm, the moldability is poor and the work becomes difficult, which is not preferable. .

In the metal glossy sheet having excellent moldability according to the present invention, the metal deposited layer (2) itself has low mechanical strength and is easily damaged by friction. Therefore, a protective resin coating film is formed on the surface of the metal deposited layer (2). It may be provided. The thickness of the protective resin coating is not particularly limited, but is usually appropriately selected from the range of 1 to 5 μm.

As a resin paint for forming such a protective resin coating film, for example, a paint composed of any of a thermoplastic resin, a thermosetting resin, an electron beam-curable resin, and an ultraviolet-curable resin is used. For example, an acrylic resin, styrene Resin, asthyl-styrene copolymer, vinyl chloride resin, vinyl acetate resin, vinyl chloride-vinyl acetate copolymer, polyamide resin, polyvinyl-butyral copolymer, polycarbonate resin, nitrocellulose resin, cellulose Acetate resin, urethane resin, urea resin, melamine resin, urea-melamine resin, epoxy resin,
A resin paint composed of an alkyd resin, an amino alkyd resin, a rosin-modified maleic resin alone or a mixture is preferably used.

The protective resin layer is formed by applying a resin coating for forming the protective resin coating by a normal coating method such as a roll coating method, a gravure coating method, a reverse coating method, a spray coating method, and drying (thermosetting). In the case of a resin, an electron beam curable resin, an ultraviolet curable resin, or the like, curing is performed.

 Next, the present invention will be described with reference to examples.

[Example] Example 1 A 25 μm-thick polyethylene terephthalate film was laminated on the surface of a 50 μm-thick Aflex (fluorocarbon resin film manufactured by Asahi Glass Co., Ltd.) via a 50 μm-thick polyethylene layer, and was attached to the back surface. Chromium is deposited by a sputtering method to form a 35-nm-thick metal vapor-deposited layer, and then a 200-μm-thick polyvinyl chloride is formed on the surface of the metal-deposited layer through a 3-μm-thick vinyl chloride-vinyl acetate adhesive layer. The sheets were laminated to obtain a metallic glossy sheet of the present invention having excellent moldability.

Comparative Example 1 Chromium was directly vapor-deposited on the back surface of a 50 μm-thick Aflex (a fluororesin film manufactured by Asahi Glass Co., Ltd.) by a sputtering method to form a 35-nm-thick metal vapor-deposited layer, and then the metal-deposited layer was formed on the surface. A 200 μm-thick polyvinyl chloride sheet was pasted through a 3 μm-thick vinyl chloride-vinyl acetate-based adhesive layer to obtain a metallic luster sheet for molding.

[Effects of the Invention] The metallic glossy sheets obtained in Example 1 and Comparative Example 1 were cut into a width of 8 mm to obtain a molding material.

The molding material of Example 1 had a beautiful metallic luster and no gloss blur was observed, and even when used in a curved molding, the curved surface did not wrinkle well.

On the other hand, the molding material of Comparative Example 1 had poor overall metallic luster, wrinkles and portions where the metallic luster disappeared, and the like, resulting in extremely poor production yield and poor industrial properties.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a basic structure of a metallic glossy sheet having excellent moldability according to the present invention. (Signs in the drawings) (1): Fluororesin-based film (2): Metallized layer (3): Adhesive layer (4): Polyvinyl chloride sheet (5): Peelable adhesive layer (6): Temporary Supporting film

Claims (1)

(57) [Claims] 1. A temporary support film is bonded to the surface of a fluororesin film via a peelable adhesive layer, and at least a metal deposition layer, an adhesive layer, a polyvinyl chloride sheet is provided on the back surface of the fluororesin film. A metallic glossy sheet having excellent moldability, characterized by sequentially forming