Multilayer web plate with improved light-permeability

Details Multilayer web plate with improved light-permeability Multilayer web plate with improved light-permeability

1986-05-08

1987-03-03

Van Balen, William J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including sheet or component perpendicular to plane of web...

428188, 428212, 428213, B32B 312, B32B 702

Patent

active

046474897

ABSTRACT:
The novel multilayer web plate comprises two generally planar outer walls and webs joining said walls to form a unit construction. According to the invention, the outer walls each comprise a combination of a core layer representing more than half the thickness of the outer wall and comprised of an extrudable, stiff plastic material with optical index of refraction n.gtoreq.1.48, and inner and outer surface layers adhesively bonded to both faces of the core layer and comprised of a hard plastic material with an optical index of refraction n.ltoreq.1.46. With this configuration, reflection losses of the transmitted light are avoided, and the light-permeability is substantially improved.

REFERENCES:
patent: 4565723 (1986-01-01), Hirsch
patent: 4569875 (1986-02-01), Pohlmann et al.

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