Patent · US Active

Recyclable polyethylene film

US10751979B2 · kind B2 · utility

6Cited by

3References

22Claims

0Family size

Assignee

CONSTANTIA PIRK GMBH & CO. KG · DE

Inventors

Achim Grefenstein · Altrip, DE
Stefan Büttner · Neumarkt i.d.OPf., DE
Ingo Geillersdörfer · Mantel, DE

Key dates

Filing date	Jul 8, 2016
Grant date	Aug 25, 2020
Priority date	—
Expiry date	Jul 8, 2036

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB32B2553/00
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

The present teaching describes a recyclable polyethylene film of at least 80% polyethylene material and max. 20% compatible polyolefin material. The polyethylene film is less than 40 μm and has a central layer of linear low-density polyethylene (LLDPE) and/or metallocene linear low-density polyethylene (mLLDPE) and two outer layers made of high-density polyethylene (HDPE) and bonded to the central layer and surrounding a central layer. The HDPE content of the polyethylene film constitutes at least 60 vol %, preferably at least 70 vol %, especially preferably at least 80 vol. The two outer layers together are at least three times as thick as the central layer, preferably at least four times as thick. The polyethylene film is stretched in at least one direction.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.