Biodegradable sheet

US11007758B2 · kind B2 · utility

Assignee

• Tipa Corp. Ltd · IL

Inventors

• Daphna Nissenbaum · Hod HaSharon, IL
• Tal Neuman · Hod HaSharon, IL
• Dori Pelled · Hod HaSharon, IL
• Shai Garty · Rehovot, IL
• Nili Konieczny · Nes Ziona, IL

Key dates

• Filing date: Apr 27, 2020
• Grant date: May 18, 2021
• Expiry date: Apr 27, 2040

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02W90/10
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

Disclosed is a biodegradable sheet comprising at least one layer which is a direct contact layer, intended to successfully contact materials, such as liquids, while maintaining the mechanical properties of the sheet and to extend the biodegradable sheet shelf life. The direct contact layer may comprise a hydrophobic polymer selected from poly(epsilon-caprolactone) (PCL) polyhydroxybutyrate (PHB), Polydioxanone (PDO) polyglycolic acid (PGA), polybutylene succinate (PBS), polybutylene succinate adipate (PBSA), poly lactic acid (PLA), polybutylene adipate terphtalate (PBAT), polyhydroxyalkanoates (PHA), such as polyhydroxybutyrates (PHB), polyhydroxyvalerates (PHV), and polyhydroxybutyrate-hydroxyvalerate copolymers (PHBV) or any mixture thereof. The biodegradable sheet may further comprise surface treated nanoclay particles, PVOH grafted with a crosslinker and PBS or PBSA The first hydrophobic polymer is present in said at least one layer in an amount of about 30% w/w.