BASE FILM FOR DICING SHEET AND METHOD OF MANUFACTURING BASE FILM
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United States of America Patent
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Oct 13, 2016
app pub date -
Nov 7, 2014
filing date -
Nov 22, 2013
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Abstract
A base film (2) includes an expandable layer (B) laminated on a cutting-fragment suppression layer (A) and having a laminate structure of a plurality of resin-based sublayers. The resin-based sublayer (B1) disposed nearest to the cutting-fragment suppression layer (A) has a stress-relaxation rate (R1) after 5 minutes of 10%-stretching. The resin-based sublayer (B2) other than the resin-based sublayer (B1) disposed nearest to the cutting-fragment suppression layer (A) has a stress-relaxation rate (R2) after 5 minutes of 10%-stretching. The cutting-fragment suppression layer (A) contains a ring-containing resin (a1) that is a thermoplastic resin having at least one type of an aromatic series-based ring and an aliphatic series-based ring and an acyclic olefin-based resin (a2) that is an olefin-based thermoplastic resin other than the ring-containing resin (a1).
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