Patent · US Expired

Multilayer web panel and a process for its manufacture

US4569875A · kind A · utility

8Cited by

1References

15Claims

0Family size

Assignee

Rohm GmbH Chemische Fabrik · DE

Inventors

Klaus E. Pohlmann · Darmstadt, DE
Heinz Vetter · Weiterstadt, DE
Ernst Friederich · Darmstadt, DE

Key dates

Filing date	Jan 13, 1984
Grant date	Feb 11, 1986
Priority date	—
Expiry date	Jan 13, 2004

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31935
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

A multilayer web panel with improved impact resistance having two substantially flat exterior walls and webs connecting the walls as one piece. At least one exterior wall has at least two adhesively bonded layers of one or more plastics, wherein the bearing layer of the exterior wall consists of an acrylic glass layer which is about 50% or more of the total thickness of the exterior wall, and the inner side of the acrylic glass layer has a thinner inner layer which is adhesively bonded thereto and is made of a plastic with a higher elongation at rupture than that of the acrylic glass.

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