Polymeric film

Details Polymeric film Polymeric film

1992-05-15

1994-07-12

Sluby, P. C.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428220, 428331, 428325, 428483, 428480, 428910, B32B 2708, B32B 516

Patent

active

053287550

ABSTRACT:
A polymeric film, particularly a polyester film, comprising an essentially unfilled primary layer substrate and a filled secondary layer exhibiting an improved combination of transparency and handling properties. The filler is a mixture of glass and silica particles. The glass particles have a volume distributed median particle diameter of 1.0 to 7.0 .mu.m and are present in the secondary layer at a concentration of 50 to 1000 ppm, while the silica particles are present in the range 200 to 2000 ppm and have an average primary particle size of 0.01 to 0.09 .mu.m. The film is suitable for use in a wide range of applications, particularly for information storage and display.

REFERENCES:
patent: 4302506 (1981-11-01), Heberger
patent: 4956232 (1990-09-01), Balloni et al.

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