Adhesive sheet laminate and method for manufacturing same
AssigneeYupo Corporation
InventorsRyota Toyama, Hiroshi Koike
Life of this patent
Estimating the term…
Abstract
The present invention relates to an adhesive sheet laminate which comprises a substrate layer composed of a thermoplastic resin composition (A) containing a polypropylene-based resin as a main component, an adhesive layer composed of a thermoplastic resin composition (B) containing a specific thermoplastic resin (b) as a main component and having a melt flow rate of 0.1 to 30 g/10 min, and a release layer composed of a thermoplastic resin composition (C) containing a specific thermoplastic resin (c) as a main component and having a melt flow rate of 0.1 to 30 g/10 min, and which has a tensile elastic modulus of 2000 MPa or more.
Claims6
An adhesive sheet laminate comprising a substrate layer, an adhesive layer, and a release layer laminated on a surface of the adhesive layer, wherein
- the substrate layer is composed of a thermoplastic resin composition (A) containing a polypropylene-based resin as a main component,
- the adhesive layer is a layer having an indentation elastic modulus of 100 MPa or less in the thickness direction, and is composed of a thermoplastic resin composition (B) containing a thermoplastic resin (b) as a main component and having a melt flow rate of 0.1 to 30 g/10 min,
- the thermoplastic resin (b) is compatible with the polypropylene-based resin and has a tensile elastic modulus of 100 MPa or less and a melting point of 175° C. or less,
- the release layer is composed of a thermoplastic resin composition (C) containing a thermoplastic resin (c) as a main component and having a melt flow rate of 0.1 to 30 g/10 min,
- the thermoplastic resin (c) is a polystyrene-based resin or an ethylene-vinyl alcohol copolymer, has a solubility parameter (SP value) of 8.3 or more, and has a melting point of 175° C. or less, and
- the adhesive sheet laminate has a tensile elastic modulus of 2000 MPa or more.
Dependencies are inferred from the claim text.