US 12,390,969 B2
Method for manufacturing an injection-molded article, in particular a bottle preform
Jean-Marie Hervet, Clichy (FR); Judith Veniez, Aulnay sous Bois (FR); Aurelien Petit, Aulnay sous Bois (FR); and Olivier Farnault, Aulnay sous Bois (FR)
Assigned to L'OREAL, Paris (FR)
Appl. No. 17/618,227
Filed by L'OREAL, Paris (FR)
PCT Filed Jun. 10, 2020, PCT No. PCT/EP2020/066024
§ 371(c)(1), (2) Date Dec. 10, 2021,
PCT Pub. No. WO2020/249585, PCT Pub. Date Dec. 17, 2020.
Claims priority of application No. 1906379 (FR), filed on Jun. 14, 2019.
Prior Publication US 2022/0266490 A1, Aug. 25, 2022
Int. Cl. B29C 45/72 (2006.01); B29C 45/00 (2006.01); B29C 49/00 (2006.01); B29C 49/06 (2006.01); B29C 49/12 (2006.01); B29C 49/64 (2006.01); B29L 31/00 (2006.01)
CPC B29C 45/7207 (2013.01) [B29C 45/0001 (2013.01); B29C 49/0005 (2013.01); B29C 49/06 (2013.01); B29C 49/12 (2013.01); B29C 49/6472 (2013.01); B29C 2045/7264 (2013.01); B29C 2945/76625 (2013.01); B29C 2945/76903 (2013.01); B29C 2949/0863 (2022.05); B29K 2995/004 (2013.01); B29L 2031/7142 (2013.01); B29L 2031/7158 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method for manufacturing an injection-molded article made of a crystallizable polymer material, the article having at least one crystallized part, the method comprising:
a) producing an injection-molded article by injecting the crystallizable polymer into a mold,
b) storing the injection-molded article for at least 1 month under a relative humidity of at least 60% and at a storage temperature from 5° C. to 35° C. such that it undergoes moisture uptake of at least 0.4% by weight,
c) crystallizing the injection-molded article after the storage b) by heating and then cooling the injection-molded article.