PLASTIC SHEET HAVING ENHANCED FORMABILITY FOR CARRIER TAPE

摘要

Herein an antistatic trilayer plastic sheet for carrier tapes, which shows high formability and punchability, is disclosed. In the trilayer structure of the plastic sheet, the middle layer is made from a composition comprising acrylonitrile-butadiene-styrene or a blend of styrenic polymers, and an inorganic filler. The presence of the inorganic filler in the middle layer increases the heat transfer rate, thereby improving the formability of the plastic sheet. The carrier tapes from the plastic sheet undergo little distortion and have well defined edges and corners thanks to the high formability. In addition to its inherent flexible and tough properties, the base resin for the middle layer is provided with mechanical strength such as modulus, which makes it possible to punch holes neatly in the plastic sheet, by the inorganic filler.