The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 01, 2024
Filed:
Dec. 29, 2022
Toray Plastics (America), Inc., North Kingstown, RI (US);
Shichen Dou, North Kingstown, RI (US);
Joshua R. Cloutier, North Kingstown, RI (US);
TORAY PLASTICS (AMERICA), INC., North Kingstown, RI (US);
Abstract
Multi-layer biaxially oriented compostable composite film with a sealant layer formulation has improved heat seal initiation temperature, enhanced plateau seal strength, and broadened heat seal temperature range, while optical clarity is maintained, and film modulus (noise) is reduced. The film includes a core layer comprising a PLA-rich biodegradable composite resin, and a heat sealable layer comprising 20 to 60 wt % amorphous polylactic acid resin, and 40 to 80 wt % flexible compostable polymeric modifier Y having a glass transition temperature of Tg≤0° C. and a melting temperature of 56° C.≤Tm≤90° C. Specifically, the flexible compostable polymeric modifier includes 20 to 70 wt % polybutylene succinate-co-adipate (PBSA) copolymer and 5 to 35 wt % polycaprolactone as a promoter of low heat seal initiation temperature (SIT) and hermeticity. The inventive compostable composite film is desirable to have improved home compostability.