JPH0641179B2 - Manufacturing method of tuning sheet for molding - Google Patents

Description

Detailed Description of the Invention

 Purpose of the invention

[Industrial applications]

The present invention relates to a method for producing a forming entrainment sheet having a high pattern entrainment accuracy and good weather resistance and formability.

[Prior art]

In order to manufacture a plastic molded product having a pattern printed in synchronization with its shape, a so-called synchronous sheet for molding is prepared, and this is molded by means such as vacuum molding to obtain a product. Conventionally, there are the following various methods for producing a forming sheet for molding, but each has its drawbacks. First of all, the method of directly printing on the surface of a synthetic resin film with good moldability and then laminating a synthetic resin sheet with good moldability on the surface is because the sheet stretches due to the heat during printing and lamination. Often, the print is deformed. Synchronous sheet obtained by the method of using synthetic resin film with high dimensional stability to prevent elongation of the sheet, and directly laminating a sheet of synthetic resin with good moldability on the back side 66 by heat The sheet does not stretch and the pattern synchronization is high, but the formability is poor. This is because, in general, a synthetic resin film having high dimensional stability does not have good moldability. Therefore, a method of producing a transfer film using a synthetic resin film having high dimensional stability and transferring the pattern to a synthetic resin sheet having good moldability has been considered. Thereby, both dimensional stability and moldability can be achieved, but the abrasion resistance of printing is not good because the ink layer is exposed on the surface. In order to secure abrasion resistance, after transferring the pattern to the back surface of the synthetic resin film with good moldability using the transfer film,
It may be good to laminate a synthetic resin sheet having good moldability, but since the film stretches due to heat during lamination as well, the pattern printing is often deformed.

[Problems to be Solved by the Invention]

An object of the present invention is to improve the drawbacks of the above-described conventional method for producing a synchronizing sheet for molding, to secure dimensional stability during printing and lamination during production, and to enhance the synchronizing accuracy of pattern printing. It is an object of the present invention to provide a method for producing a molding entraining sheet having good properties and excellent weather resistance. Structure of the invention

[Means for solving problems]

Referring to the drawings, as shown in FIG. 1, the method for producing a molding entraining sheet of the present invention is such that a synthetic resin film 1 having high dimensional stability is formed on a synthetic resin film having excellent weather resistance and moldability. A resin layer 2 is formed by casting or heat lamination, a pattern 3 is printed on the synthetic resin layer 2 having excellent weather resistance and moldability, and a synthetic resin sheet 4 having good moldability is further formed thereon. After being laminated, as shown in FIG. 2, the synthetic resin film 1 having high dimensional stability is formed.
Is peeled off. As a synthetic resin film having high dimensional stability, a film selected from polyester, polycarbonate and polyimide is suitable. Polyvinyl chloride or polymethyl methacrylate may be used as the material for forming the synthetic resin layer having excellent weather resistance and moldability. As a synthetic resin sheet with good moldability, polyvinyl chloride, ABS, polyethylene, polypropylene, EVA,
A sheet selected from polymethylmethacrylate, polystyrene and nylon can be preferably used. The pattern can be printed by using a normal printing ink by gravure or any other method.

[Work]

As shown in FIG. 1, the pattern printing 3 is applied to the synthetic resin layer 2 having excellent weather resistance and moldability, which is formed by casting or thermal lamination on the synthetic resin film 1 having high dimensional stability. The elongation of the synthetic resin layer 2 having excellent weather resistance and moldability due to heat during printing is prevented by the synthetic resin film 1 having high dimensional stability, and printing can be performed while maintaining dimensional stability. Since the synthetic resin sheet 4 having good moldability is laminated on this, elongation due to heat at the time of lamination is prevented, and the lamination is performed in a state where the dimensions are also stable. Since the synthetic resin film 1 having high dimensional stability and the synthetic resin layer 2 having excellent weather resistance and moldability are in a temporary adhesion state with weak adhesive strength, as shown in FIG. When the film 1 is peeled off, a molding entraining sheet having good weather resistance and moldability can be obtained.

【Example】

As a synthetic resin film having high dimensional stability, a polyester film “Lumira-S-10” (Toray) having a thickness of 50 μ was used, and a synthetic resin layer having excellent weather resistance and moldability was formed on the polyester film having a thickness of 50 μ. Polyvinyl chloride "N-1
A 4 "(Japan Carbide) layer was formed by casting. On this polyvinyl chloride layer, a pattern was printed by silk screen printing. On top of this,
As a synthetic resin sheet with good moldability, a thickness of 500μ
ABS sheet “201” (Sanbo) of
Lamination was performed by hot pressing under a pressure of 40 kg / cm ² for 3 minutes. The polyester film was peeled off to obtain a molding entrainment sheet. This sheet exhibited good formability when formed by vacuum forming, and the vacuum formed product had excellent weather resistance. EFFECTS OF THE INVENTION By using the method for manufacturing the entraining sheet for molding of the present invention, it is possible to perform pattern printing with high entrainment accuracy while ensuring dimensional stability during printing during printing and laminating. A good forming entrainment sheet can be obtained. A molded product obtained by molding this tuning sheet has good weather resistance because the surface layer is a material having good weather resistance.

[Brief description of drawings]

The drawings are schematic cross-sectional views showing the steps of the method for producing the entraining sheet for molding of the present invention. FIG. 1 shows a synthetic resin film having high dimensional stability and excellent weather resistance and molding. Fig. 2 shows the step of forming a layer of synthetic resin, printing a pattern on this layer, and laminating a synthetic resin sheet with good moldability on this layer. Fig. 2 shows a synthetic resin with high dimensional stability. The stages at which the film is peeled off and the entraining sheet for molding is manufactured are shown respectively. 1 …… Synthetic resin film with high dimensional stability 2 …… Synthetic resin layer with excellent weather resistance and moldability 3 …… Printing patterns 4 …… Synthetic resin sheet with good moldability

Claims (4)

[Claims] 1. A synthetic resin film having high dimensional stability,
A synthetic resin layer with excellent weather resistance and moldability is formed by casting or heat lamination, and a pattern is printed on this synthetic resin layer with excellent weather resistance and moldability. A method of manufacturing a molding entraining sheet, comprising laminating the synthetic resin sheets, and peeling the synthetic resin film having high dimensional stability. 2. The method for producing a molding entraining sheet according to claim 1, wherein the synthetic resin film having high dimensional stability is a film selected from polyester, polycarbonate and polyimide. 3. The method for producing a molding entraining sheet according to claim 1, wherein polyvinyl chloride or polymethyl methacrylate is used as a synthetic resin having excellent weather resistance and moldability. 4. A synthetic resin sheet having good moldability, which is a sheet selected from polyvinyl chloride, ABS, polyethylene, polypropylene, EVA, polymethylmethacrylate, polystyrene and nylon. Item 8. A method for manufacturing a forming entrainment sheet according to item.