METHOD FOR PRODUCING PRESSURE-SENSITIVE ADHESIVE SHEET HAVING ULTRAVIOLET-RAY CURING-TYPE ACRYLIC PRESSURE-SENSITIVE ADHESIVE LAYER
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United States of America Patent
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Issued Date -
Aug 7, 2014
app pub date -
Jan 31, 2014
filing date -
Feb 1, 2013
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Provided is a method for producing a pressure-sensitive adhesive sheet having an ultraviolet-ray curing-type acrylic pressure-sensitive adhesive layer that has a high conversion per unit amount of light, is excellent in productivity, and is also excellent in balance between pressure-sensitive adhesive performances. The method includes: a pressure-sensitive adhesive layer forming step in which the composition is irradiated with and cured by ultraviolet rays to form a pressure-sensitive adhesive layer; wherein an ultraviolet lamp that radiates the ultraviolet rays in the pressure-sensitive adhesive layer forming step is an LED lamp; the ultraviolet rays are radiated intermittently; and the time of bright periods when the ultraviolet rays are radiated is from 1 second to 30 seconds, and the time of dark periods when the rays are not radiated is from 0.1 timed to 20 times the time of the bright periods.
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