Patent ID: 9662866
Date: 2017-05-30
CPC Classifications: B32B,Y10T

Claim:
1. A cover tape comprising at least a base layer (A), an intermediate layer (B), a peeling layer (C) which comprises a thermoplastic resin as a main component, and a heat seal layer (D) which comprises a thermoplastic resin as a main component heat-sealable to a carrier tape, wherein the thermoplastic resin forming the peeling layer (C) has a tensile storage modulus (c) of at least 1×10 the thermoplastic resin forming the heat seal layer (D) has a tensile storage modulus (d) of at least 1×10 a ratio between (c) and (d) is 1×10 the intermediate layer (B) comprises a linear low density polyethylene having a density in the range of 0.900 to 0.925×10 the thermoplastic resin in the peeling layer (C) consists of a resin selected from an ethylene-vinyl acetate copolymer resin, a styrene-butadiene copolymer resin, a hydrogenated styrene-butadiene copolymer, a styrene-isoprene copolymer resin and a hydrogenated styrene-isoprene copolymer resin.