US 12,318,973 B2
Injection molding method
Hayato Tsuda, Osaka (JP); Takahisa Aoyama, Osaka (JP); Tadaharu Isaka, Osaka (JP); Yukari Yamamoto, Osaka (JP); and Yumi Zenke, Osaka (JP)
Assigned to DAIKIN INDUSTRIES, LTD., Osaka (JP)
Filed by DAIKIN INDUSTRIES, LTD., Osaka (JP)
Filed on Feb. 25, 2022, as Appl. No. 17/680,911.
Application 17/680,911 is a continuation of application No. PCT/JP2020/032234, filed on Aug. 26, 2020.
Claims priority of application No. 2019-153770 (JP), filed on Aug. 26, 2019.
Prior Publication US 2022/0266485 A1, Aug. 25, 2022
Int. Cl. B29C 45/00 (2006.01); B29K 27/18 (2006.01); B29K 105/00 (2006.01); B29L 31/26 (2006.01)
CPC B29C 45/0001 (2013.01) [B29C 45/0046 (2013.01); B29K 2027/18 (2013.01); B29K 2105/0085 (2013.01); B29K 2995/0097 (2013.01); B29L 2031/26 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An injection molding method for obtaining an injection molded article using an injection molding machine by means of filling a mold cavity of a mold with a molten copolymer from a nozzle of the injection molding machine, wherein
a minimum thickness of the mold cavity is 0.8 mm or less, where the minimum thickness of the mold cavity is a distance between walls of the mold cavity that will form a thinnest wall part of the injection molded article,
a total projected area of the mold is 1 cm2 or more, and
the copolymer is a copolymer containing a tetrafluoroethylene unit and a fluoroalkyl vinyl ether unit, wherein the number of functional groups is 100 or less per 106 main-chain carbon atoms of the copolymer and a melt flow rate of the copolymer is 20 g/10 minutes or more.