JP2005288720A - Insert film and molded product using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an insert film excellent in friction resistance or thermal shock properties and having transparency, and a molded product using it. <P>SOLUTION: A vapor deposition thin film layer (12) is formed on one side of a base material film (11) and a hard coat layer (13) is formed on the side, on which no vapor deposition thin film layer (12) is formed, of the base material film (11). Then, an ink layer (14) and an adhesive varnish layer (15) are successively laminated on the vapor deposition thin film layer (12). <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an insert film and a molded product thereof, and more particularly to an insert film for an LCD display panel member used for a mobile phone, an advanced information terminal, a small LCD camera and the like, and a molded product using the same.

  Conventionally, an in-mold label processing method is known in which a label subjected to printing and heat-sensitive sealant processing is inserted into a mold for plastic molding, and the label is attached to the surface of the molded product at the same time as molding ( For example, see Patent Document 1).

The said prior art document is shown.
JP, 2004-40365, A (Claim 1) This invention basically requires a peeling varnish, and the physical property level of the transferred vapor-deposited thin film layer is determined by the scratch properties such as friction and thermal shock properties (-40). There is a problem in that a softening and a warp do not occur by a cycle test of ° C to + 85 ° C), and the level is not suitable for an LCD display panel member. There is also a problem with transparency.

  The present invention has been made in view of the above problems relating to an insert film used for an LCD display panel member and a molded product using the insert film, and is an insert having excellent friction resistance and thermal shock properties and transparency. It is an object to provide a film and a molded product using the film.

  According to the first aspect of the present invention, a vapor-deposited thin film layer is formed on one side of the base film, and a hard coat layer is formed on the side of the base film on which the vapor-deposited thin film layer is not formed. An insert film for an in-mold label, wherein an ink layer and an adhesive varnish layer are sequentially laminated on the deposited thin film layer.

  Thus, according to the first aspect of the present invention, the vapor-deposited thin film layer is formed on one surface of the base film, and the hard coat layer is formed on the surface of the base film on which the vapor-deposited thin film layer is not formed. Since an ink layer and an adhesive varnish layer are sequentially laminated on the vapor-deposited thin film layer, a hard coat layer is formed on the uppermost layer of the insert film. It is an insert film that is excellent and has transparency.

  Moreover, invention of Claim 2 is a molded article which carried out in-mold shaping | molding using the insert film of Claim 1.

  As described above, according to the invention described in claim 2, since the molded product is produced by in-mold molding using the insert film, the finished injection molded product is a molded product having excellent friction resistance and transparency. is there.

As described above, according to the present invention, the insert film itself is welded to the product at the time of in-mold molding, so that the friction resistance and the thermal shock property are remarkably improved as compared with the conventional film insert transfer method. Further, it is not necessary to use a peeling varnish or a restraining varnish.

  The insert film of this invention is demonstrated in detail below based on one Embodiment.

  In the insert film (10) of the present invention, for example, as shown in FIG. 1, a vapor-deposited thin film layer (12) is formed on one surface of a base film (11), and the other vapor-deposited thin film layer is not formed. A hard coat layer (13) is formed on the surface, and an ink layer (14) and an adhesive varnish layer (15) are sequentially laminated on the deposited thin film layer (12).

  As the substrate film (11), a polyethylene terephthalate film, a polycarbonate film or the like suitable for vapor deposition can be preferably used. If necessary, a pretreatment such as a corona discharge treatment can be performed. The thing of the thickness of 75-125 micrometers can be used conveniently.

  The vapor deposition thin film layer (12) is formed by providing a thin film of an inorganic compound such as aluminum oxide or silicon oxide on a base film with a thickness of about 20 to 100 nm by a vapor deposition method such as physical vapor deposition or chemical vapor deposition. As the inorganic compound, it is preferable to use aluminum oxide or magnesium oxide having excellent transparency.

  The hard coat layer (13) is a layer made of UV / EB curable resin (main structure is polyfunctional acrylic, acrylic functional polymer). More specifically, for example, beam set HC900, beam set HC910 (Arakawa Chemical Industries, Ltd.) Product). This resin is a layer coated on the surface of the base film (11) where the vapor-deposited thin film layer (12) is not formed by a silk screen printing method to a thickness of about 25 to 30 μm (line number: 225 to 250). line). This layer has excellent friction and chemical resistance.

  The ink layer (14) formed on the deposited thin film layer (12) is formed by ordinary silk screen printing.

  The adhesive varnish layer (15) formed on the ink layer (14) needs to have good adhesion to a plastic molded article (20) described later. For example, in 100 parts of a polyester resin adhesive, A medium to which 5 to 10 parts of urethane resin is added and 5 to 8 parts (5%) of an aromatic isocyanate resin as a curing agent is preferably used. About 5 to 10 parts (5%) of the aromatic isocyanate resin added as a curing agent may be changed to about 5 to 10 parts (10%) of the aliphatic isocyanate resin.

  After that, necessary processing such as cutting, small-rise drawing and punching is performed. Depending on the application, pasta processing may be performed, and a thin film deposition layer may not be required.

  When the insert film (10) thus produced is molded into an LCD display panel member (20) of a mobile phone by an in-mold molding method using, for example, polycarbonate resin or polymethyl methacrylate resin, a mold The insert film (10) is inserted with the adhesive varnish surface inside, and the insert film (10) is formed simultaneously with the molding of the LCD display panel member for mobile phones by the heat of the resin during molding. ) To be fused to the surface.

The result of the pencil hardness test according to JIS K5400 of this molded article (20) is 3H level when a polyethylene terephthalate film is used as the base film, and 2H level when a polycarbonate film is used as the base film. As an LCD display panel member, it is sufficiently durable.

  Further, the molded article (20) using the polycarbonate resin satisfies the international standard thermal shock test of 10 cycles of −40 ° C. × 0.5 hr → + 85 ° C. × 0.5 hr.

It is sectional explanatory drawing which shows one Example of the laminated constitution of the insert film of this invention. It is sectional explanatory drawing which shows one Example of the laminated constitution of the molded article which carried out the in-mold shaping | molding using the insert film of this invention.

Explanation of symbols

10 ... Insert film 11 ... Base film 12 ... Deposition thin film layer 13 ... Hard coat layer 14 ... Ink layer 15 ... Adhesive varnish layer 20 ... Plastic molded product

Claims (2)

A vapor-deposited thin film layer is formed on one side of the base film, and a hard coat layer is formed on the side of the base film on which the vapor-deposited thin film layer is not formed,
An insert film for an in-mold label, wherein an ink layer and an adhesive varnish layer are sequentially laminated on the deposited thin film layer.   A molded product obtained by in-mold molding using the insert film according to claim 1.

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