Patent ID: 11865750
Assignee: MITSUI CHEMICALS, INC.
Field: Other special machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A composite structure comprising:
a metal member; and
a thermoplastic resin member bonded to the metal member,
wherein the metal member has a fine uneven structure at least on a metal surface to which the thermoplastic resin member is bonded,
a hardness of the thermoplastic resin member measured by a type A durometer in accordance with JIS K6253 is in a range of equal to or more than A60 and equal to or less than A95, and
an acid value of the thermoplastic resin member is equal to or more than 1 mgKOH/g and equal to or less than 100 mgKOH/g,
wherein an average length (RSm) of a roughness curve element of the metal surface on which the fine uneven structure is formed, the average length being measured in accordance with JIS B0601: 2001, is equal to or more than 10 nm and equal to or less than 500 μm;
a ten-point average roughness (Rzjis) of the metal surface on which the fine uneven structure is formed, the ten-point average roughness being measured in accordance with JIS B0601: 2001, is equal to or more than 10 nm and equal to or less than 300 μm;
the thermoplastic resin member contains a thermoplastic elastomer; and
the thermoplastic elastomer consists of an elastic material that does not need to be vulcanized,
wherein the thermoplastic resin member contains a urethane-based thermoplastic elastomer and an amide-based thermoplastic elastomer,
wherein the thermoplastic resin member further contains an acid-modified polymer,
wherein, in the thermoplastic elastomer, a content of the urethane-based thermoplastic elastomer is equal to or more than 70% by mass and equal to or less than 99% by mass, and a content of the amide-based thermoplastic elastomer is equal to or more than 1% by mass and equal to or less than 30% by mass, and
wherein, in the thermoplastic resin member, a content of the thermoplastic elastomer is equal to or more than 60% by mass and equal to or less than 95% by mass, and a content of the acid-modified polymer is equal to or more than 5% by mass and equal to or less than 40% by mass.