	US 12,330,363 B2
	Injection stretch blow-molding (ISBM) enhancement for semi-crystalline polyolefin containers utilizing alicyclic polyolefins
Paul D. Tatarka, Union, KY (US); and Timothy M. Kneale, Florence, KY (US)
Assigned to Polyplastics USA, Inc., Farmington Hills, MI (US)
Filed by Polyplastics USA, Inc., Farmington Hills, MI (US)
Filed on Dec. 16, 2022, as Appl. No. 18/082,763.
Application 18/082,763 is a division of application No. 16/078,536, granted, now 11,577,443, previously published as PCT/US2017/019571, filed on Feb. 27, 2017.
Claims priority of provisional application 62/306,660, filed on Mar. 11, 2016.
Prior Publication US 2023/0226739 A1, Jul. 20, 2023
Int. Cl. B29C 49/00 (2006.01); B29C 49/02 (2006.01); B29C 49/06 (2006.01); B29C 49/12 (2006.01); C08L 23/08 (2025.01); C08L 23/0807 (2025.01); B29K 23/00 (2006.01); B29L 31/00 (2006.01); B65D 1/02 (2006.01); C08L 23/06 (2006.01)

CPC B29C 49/06 (2013.01) [B29C 49/0006 (2022.05); B29C 49/12 (2013.01); C08L 23/0823 (2013.01); B29C 2049/024 (2013.01); B29K 2023/06 (2013.01); B29K 2023/065 (2013.01); B29K 2023/08 (2013.01); B29K 2023/12 (2013.01); B29K 2023/38 (2013.01); B29L 2031/7158 (2013.01); B65D 1/0207 (2013.01); C08L 23/06 (2013.01); C08L 2207/062 (2013.01)]

11 Claims

1. An injection stretch blow-molded (ISBM) container prepared by way of injection molding a tubular preform followed by reheating and concurrently stretching and blow-molding the heated preform into the container, the container and preform comprising from 70 wt. % to 85 wt. % of a semi-crystalline polyolefin composition comprising polymers selected from polyethylene polymers and polypropylene polymers and from 17% to 22.5 wt. % of an alicyclic polyolefin composition, wherein the alicyclic polyolefin composition has a glass transition temperature, Tg, of from 60° to 145° C. and wherein the ISBM container is characterized by an Axial Stretch Ratio of from 1.75:1 to 3.25:1 with respect to the preform as well as a Blow-Up Ratio of from 4.0:1 to 9.0:1 with respect to the preform.