Infrared absorbing film improved in transparency
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United States of America Patent
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-
Oct 26, 1993
Grant Date -
N/A
app pub date -
Sep 23, 1991
filing date -
Oct 3, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Disclosed is an infrared absorbing film comprising a synthetic resin and silicon oxide, wherein the silicon oxide is used in an amount of about 2 to about 25% by weight based on the synthetic resin, and wherein the silicon oxide is produced by underwater grinding, has an average particle size of not more than 4 .mu.m, is substantially free of particles exceeding 20 .mu.m in average particle size, and has a specific surface area of not more than 20 m.sup.2 /g. The film may further comprise a transparent resin layer formed over at least one surface thereof.
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