Patent · US Expired

Process for imparting a surface coating to films

US4897235A · kind A · utility

5Cited by

5References

4Claims

0Family size

Assignee

Wolff Walsrode AG · DE

Inventors

Heinrich Rosenthal · Walsrode, DE
Ingo Schinkel · Walsrode, DE

Key dates

Filing date	Jun 8, 1988
Grant date	Jan 30, 1990
Priority date	—
Expiry date	Jun 8, 2008

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB05D2252/10
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

Process for the production of surface-finished, at least monoaxially stretched, thermoplastic films which are characterized in that the surface coating is imparted by means of slot doctoring systems before at least one stretching stage, and the subsequent stretching is carried out without contact with the surface.

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