SHEET FOR DRILL BORING PROCESSING

摘要

PROBLEM TO BE SOLVED: To provide a thermoplastic resin sheet having a sufficient drill cutting property and regenerable as a backup board used for a drill boring processing for a printed wiring board material. SOLUTION: The sheet comprises a thermoplastic resin composition containing (A) at least one kind of thermoplastic resin selected from (C) a styrene-based resin and (D) a polyolefin-based resin, and (B) a cellulose-based material powder. (A) a part of the thermoplastic resin may be a waste material. Further, it preferably further contains (E) a metal deposition preventing additive. COPYRIGHT: (C)2008,JPO&INPIT