Patent · US Expired

Photographic paper support with a water resistant coating of polyethylene

US4898773A · kind A · utility

4Cited by

3References

17Claims

0Family size

Assignee

Felix Schoeller GmbH & Co. KG · DE

Inventors

Ralf-Burkhard Dethlefs · Osnabrück, DE
Bernd Scholz · Osnabrück, DE
Wolfram Wysk · Belm, DE

Key dates

Filing date	Jul 24, 1987
Grant date	Feb 6, 1990
Priority date	—
Expiry date	Jul 24, 2007

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31913
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

A photographic paper support, which carries on both sides a water resistant coating of polyethylene, is disclosed. The polyethylene is a polyethylene of relatively low density of between 0.930 and 0.936 gram per cubic centimeter, which is produced according to high pressure polymerization. In particular, low density polyethylene (LDPE) produced according to the high pressure method with a density of 0.934 gram per cubic centimeter can be employed.

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