Resin film for laminating metal plate and laminated metal plate using the same
AssigneeToyo Kohan Co., Ltd.
InventorsYoshimi Itoh, Masashi Ikebuchi, Kenjirou Tanaka
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Abstract
A resin film for laminating a metal plate including a resin composition including a polyester-based thermoplastic elastomer and a thermoplastic polyester having a glass transition temperature (Tg) of 70° C. or more and 90° C. or less. The thermoplastic elastomer is dispersed in the thermoplastic polyester. A content of the thermoplastic elastomer in the film is 2 to 50 wt %, and an absolute value ΔTg of a difference between a glass transition temperature of the thermoplastic polyester and a glass transition temperature of the film satisfies the following Expression (1): ΔTg<0.5×W (1) wherein W represents the thermoplastic elastomer content (wt %) in the film.
Claims10
A resin film for laminating a metal plate comprising a resin composition including a polyester-based thermoplastic elastomer and a thermoplastic polyester having a glass transition temperature (Tg) of 72 to 85° C. where the thermoplastic elastomer is dispersed in the thermoplastic polyester, wherein
- a content of the thermoplastic elastomer in the film is 2.5 to 25 wt %,
- a content of the thermoplastic polyester in the film is 74.5 wt % to 97.5 wt %,
- the thermoplastic polyester is a polyethylene terephthalate copolymerized with isophthalic acid,
- the polyester-based thermoplastic elastomer is a resin obtained by copolymerizing polybutylene terephthalate with 34 to 56 wt % of polytetramethylene glycol, and an absolute value ΔTg of a difference between a glass transition temperature of the thermoplastic polyester and a glass transition temperature of the film satisfies the following Expression (1):
- ΔTg<0.5×W(1)
- wherein W represents a thermoplastic elastomer content (wt %) in the film.
Dependencies are inferred from the claim text.