Patent · US Expired

Tubular film of polyethylene terephthalate and process for the production thereof

US4034055A · kind A · utility

7Cited by

4References

5Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Hans Strutzel · Wiesbaden, DE
Detlef Gneuss · Bad Oeynhausen, DE
Ludwig Klenk · Obermoschel, DE

Key dates

Filing date	Mar 18, 1975
Grant date	Jul 5, 1977
Priority date	—
Expiry date	Mar 18, 1995

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29K2067/00
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

This invention relates to a biaxially stretched and longitudinally afterstretched thin-walled tubular film of polyethylene terephthalate having a tensile stress of 40 to 60 kg/mm.sup.2 and a tear resistance of 40 to 70 kg/mm.sup.2 in the longitudinal direction, and an elongation at break of 350 to 800% in the transverse direction. The invention also relates to a process for the production of the film.

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