Granted Patent B2

US 12,539,653 · App. 18/453,775 · Granted Feb 3, 2026

Inventors: Hayato Tsuda (Osaka, JP); Tadaharu Isaka (Osaka, JP); Yumi Zenke (Osaka, JP); Yukari Yamamoto (Osaka, JP); Yasuyuki Yamaguchi (Osaka, JP); Hiroyuki Hamada (Osaka, JP)

Assignee: DAIKIN INDUSTRIES, LTD.

B29C45/0001F16L9/127B29K2027/12B29K2027/18B29K2995/0012

Abstract

Claims (13)

1 . An injection molded article comprising a bottom surface section, and a side surface section erected from a peripheral edge of the bottom surface section, wherein

a height from the bottom surface section of the side surface section is 3.8 cm or larger,

a ratio of a height from the bottom surface section of the side surface section to an average thickness of the side surface section (height/thickness) is 19.0 or more,

a load applied to a lower end section of the side surface section is 0.8 kPa or higher,

the injection molded article comprises a copolymer comprising tetrafluoroethylene unit and a fluoro(alkyl vinyl ether) unit,

a content of the fluoro(alkyl vinyl ether) unit of the copolymer is 4.5 to 6.0% by mass with respect to the whole of the monomer units, a melt flow rate at 372° C. of the copolymer is 35.0 to 60.0 g/10 min, and the total number of —CF═CF 2 , —CF 2 H, —COF, —COOH, —COOCH 3 , —CONH 2 and —CH 2 OH of the copolymer is 50 or less per 10 6 main-chain carbon atoms.

2 . The injection molded article according to claim 1 , wherein a specific gravity of the side surface section is 2.05 to 2.25 g/cm 3 .

3 . The injection molded article according to claim 1 , wherein the shape of the bottom surface section is a substantially circular shape or a substantially elliptical shape.

4 . The injection molded article according to claim 1 , further comprising an opening formed on an upper end of the side surface section.

5 . The injection molded article according to claim 1 , wherein the fluoro(alkyl vinyl ether) unit of the copolymer is perfluoro(propyl vinyl ether) unit.

6 . The injection molded article according to claim 1 , wherein the content of the fluoro(alkyl vinyl ether) unit of the copolymer is 4.7 to 5.6% by mass with respect to the whole of the monomer units.

7 . The injection molded article according to claim 1 , wherein the melt flow rate at 372° C. of the copolymer is 38.0 to g/10 min.

8 . The injection molded article according to claim 1 , wherein the melting point of the copolymer is 295 to 315° C.

Assignments (1)

Priority Claims (2)

Continuity (2)

References Cited (400)