US 12,351,666 B2
Manufacturing method of polymer material
Te-Chao Liao, Taipei (TW); Ching-Yao Yuan, Taipei (TW); and Wei Tang Liao, Taipei (TW)
Assigned to NAN YA PLASTICS CORPORATION, Taipei (TW)
Filed by NAN YA PLASTICS CORPORATION, Taipei (TW)
Filed on Sep. 19, 2022, as Appl. No. 17/947,183.
Claims priority of application No. 111130471 (TW), filed on Aug. 12, 2022.
Prior Publication US 2024/0052082 A1, Feb. 15, 2024
Int. Cl. C08F 283/02 (2006.01); C08J 9/00 (2006.01)
CPC C08F 283/02 (2013.01) [C08J 9/0061 (2013.01); C08J 2203/08 (2013.01); C08J 2367/08 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A manufacturing method of a foamed polymer material, comprising:
providing a raw material comprising polyethylene terephthalate (PET);
performing an alcoholysis reaction by reacting the raw material with aliphatic diols to form an intermediate product, wherein the intermediate product comprises bis 2-hydroxyethyl terephthalate (BHET), and the alcoholysis reaction does not include a transesterification reaction;
performing a polymerization reaction of the intermediate product and polytetramethylene ether glycol to obtain a thermoplastic polyester elastomer,
mixing additives with the thermoplastic polyester elastomer to obtain a foamable masterbatch, and
mixing the foamable masterbatch with a supercritical fluid through a supercritical fluid injection machine for injection molding to obtain the foamed polymer material,
wherein an antioxidant is present in both of the alcoholysis reaction and the polymerization reaction,
wherein a proportion of polymer repeating units derived from the BHET in the thermoplastic polyester elastomer is between 30 wt % and 80 wt %,
wherein a proportion of polymer repeating units derived from the polytetramethylene ether glycol in the thermoplastic polyester elastomer is between 20 wt % and 70 wt %.