Patent ID: 11945142
Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
Field: Other special machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A composite resin molded product for an acoustic member, the composite resin molded product comprising:
a main agent resin that is a thermoplastic resin selected from the group consisting of olefin resins, styrene resins, organic acid vinyl ester resins or derivatives thereof, vinyl ether resins, halogen-containing resins, polycarbonate resins, polyamide resins, thermoplastic polyurethane resins, polysulfone-based resins, polyphenylene ether-based resins, cellulose esters resins, cellulose carbamates resins, cellulose ethers resins, polydimethylsiloxane resins, polymethylphenylsiloxane resins, diene rubber or elastomer resins, and biomass plastics resins; and
fibrous fillers dispersed in the main agent resin; and
a dispersant for improving adhesiveness between the fibrous fillers and the main agent resin, wherein
a concentration of the fibrous fillers is 50% by weight or more in the composite resin molded product,
in the composite resin molded product, crystallinity of the main agent resin at first parts around the fibrous fillers is higher than crystallinity of the main agent resin at a second part other than the first parts, the second part being between the fibrous fillers,
a content of the dispersant is 0.01% by mass or more and 20% by mass or less in the composite resin molded product,
wherein a surface of the composite resin molded product has a hole or a crack, and a width of the hole or the crack is 1/10 or less of a diameter of each of the fibrous fillers, and
wherein the fibrous filler in the composite resin molded product is not hydrophobized in advance.