Laminated film for decorating three-dimensional molded product by vacuum forming, production method thereof, and method for decorating three-dimensional molded product

Patent metadata

Field	Value
Publication number	US-10828823-B2
Application number	US-201615550116-A
Country	US
Kind code	B2
Filing date	Feb 19, 2016
Priority date	Feb 23, 2015
Publication date	Nov 10, 2020
Grant date	Nov 10, 2020

Abstract

The present disclosure is to provide a laminated film for decorating a three-dimensional molded product by vacuum forming which has a crack and strain-free uneven design on the clear coating film layer being an outermost layer at the time of use and provide a good design property to a molded product.
A laminated film for decorating a three-dimensional molded product by vacuum forming, having a base material film layer (A), a clear coating film layer (B), and a design layer (C), wherein at least one face of the base material film layer (A) bordering the clear coating film layer (B) has an uneven design.

First claim

The invention claimed is:

1. A laminated film for decorating a three-dimensional molded product by vacuum forming, comprising:
a base material film layer (A), a clear coating film layer (B), and a design layer (C), wherein at least one face of the base material film layer (A) bordering the clear coating film layer (B) has an uneven design;
wherein the clear coating film layer (B) is a layer formed from an active energy ray-curing type coating composition containing a polyurethane acrylate (B 1 ); and
wherein physical properties of the polyurethane acrylate (B 1 ) are:
a double bond equivalent of from 130 to 600 g/eq;
a weight average molecular weight of from 3000 to 200,000; and
a urethane concentration of from 300 to 2000 g/eq.

2. The laminated film according to claim 1 , comprising a breaking elongation of 30 to 400% at 40 to 130° C. before being cured.

3. The laminated film according to claim 1 ,
wherein the clear coating film layer (B) is formed from an active energy ray-curing type coating composition containing a polyurethane acrylate (B 1 ), a monomer/oligomer (B 2 ) having an unsaturated double bond and a polymerization initiator (B 3 ), and
the active energy ray-curing type coating composition contains the (B 1 ) 50 to 99 wt parts, and (B 2 ) 1 to 50 wt parts relative to total amount of solid matter weight of (B 1 ) and solid matter weight of (B 2 ) being ((B 1 )+(B 2 )) 100 wt parts, and (B 3 ) 0.5 to 20 wt parts relative to total amount of solid matter weight of (B 1 ) and solid matter weight of (B 2 ) being ((B 1 )+(B 2 )) 100 wt parts.

4. The laminated film according to claim 2 ,
wherein the clear coating film layer (B) is formed from an active energy ray-curing type coating composition containing a polyurethane acrylate (B 1 ), a monomer/oligomer (B 2 ) having an unsaturated double bond and a polymerization initiator (B 3 ), and the active energy ray-curing type coating composition contains the (B 1 ) 50 to 99 wt parts, and (B 2 ) 1 to 50 wt parts relative to total amount of solid matter weight of (B 1 ) and solid matter weight of (B 2 ) being ((B 1 )+(B 2 )) 100 wt parts, and (B 3 ) 0.5 to 20 wt parts relative to total amount of solid matter weight of (B 1 ) and solid matter weight of (B 2 ) being ((B 1 )+(B 2 )) 100 wt parts.

5. The laminated film according to claim 1 ,
which is a film prepared by laminating a base material film layer (A), a clear coating film layer (B), and a design layer (C) in this order.

6. The laminated film according to claim 2 , which is a film prepared by laminating a base material film layer (A), a clear coating film layer (B), and a design layer (C) in this order.

7. The laminated film according to claim 3 , which is a film prepared by laminating a base material film layer (A), a clear coating film layer (B), and a design layer (C) in this order.

8. The laminated film according to claim 4 , which is a film prepared by laminating a base material film layer (A), a clear coating film layer (B), and a design layer (C) in this order.

9. The laminated film according to claim 1 , further comprising an adhesion layer (E) on the outer side of the design layer (C).

10. The laminated film according to claim 2 , further comprising an adhesion layer (E) on the outer side of the design layer (C).

11. The laminated film according to claim 3 , further comprising an adhesion layer (E) on the outer side of the design layer (C).

12. The laminated film according to claim 4 , further comprising an adhesion layer (E) on the outer side of the design layer (C).

13. The laminated film according to claim 5 , further comprising an adhesion layer (E) on the outer side of the design layer (C).

14. The laminated film according to claim 6 , further comprising an adhesion layer (E) on the outer side of the design layer (C).

15. The laminated film according to claim 7 , further comprising an adhesion layer (E) on the outer side of the design layer (C).

16. The laminated film according to claim 8 , further comprising an adhesion layer (E) on the outer side of the design layer (C).

17. The laminated film according to claim 9 , wherein the adhesion layer (E) is formed by applying or laminating.

18. A method for producing the laminated film according to claim 1 , the method comprising:
a step (1) of forming a clear coating film layer (B) on a face having an uneven design of a base material film layer (A) having at least one face with an uneven design; and
a step (2) of forming a design layer (C).

19. The method according to claim 18 , further comprising a step of forming an adhesion layer (E) on the design layer (C).

20. A method for decorating a three-dimensional molded product, which comprises adhering the adhesion layer of the laminated film according to claim 1 , to a three-dimensional molded product under a heating condition.

Assignees

• Nippon Paint Automotive Coatings Co Ltd

Inventors

• Hase Takakazu
• Kitamura Masahiro

Classifications

• B05D7/5723

  all layers being applied simultaneously · CPC title

• B05D1/286

  using a temporary backing to which the coating has been applied · CPC title

• B44C1/1704

  Decalcomanias provided with a particular decorative layer, e.g. specially adapted to allow the formation of a metallic or dyestuff layer on a substrate unsuitable for direct deposition (B44C1/1716, B44C1/1737 take precedence) · CPC title

• B29C51/10

  Forming by pressure difference, e.g. vacuum · CPC title

• B29C59/046

  for layered or coated substantially flat surfaces · CPC title