Method of reducing web distortion
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United States of America Patent
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app pub date -
Nov 5, 2003
filing date -
Jun 26, 2002
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Abandoned
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Abstract
The present invention discloses processes for an embossing thin films that uniformly anneals the full cross section of a web of polymeric material, stabilizes the hot web while the web cools, bonds/laminates the embossed area of the web to a carrier and allows a cycle time of 10 seconds or less, preferably 3 seconds or less. Embodiments of the process incorporates a thermal embossing process to bond/laminate the polymeric web to the carrier concurrent with the embossing of the polymeric web and transfers the hot embossed web from the embossing, which allows an unembossed area of web to enter the embossing zone. This process is applicable to continuous roll-to-roll as well as intermittent motion platen embossing configurations and may be used to replicate information and/or track structure for an optical memory disk on one surface of the web. Embodiments of the present invention are particularly useful for embossing thin webs having a thickness of 600 .mu.m or less, preferably 125 .mu.m or less.
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