| 摘要 |
<p>PROBLEM TO BE SOLVED: To make a cover tape excellent in an antistatic effect while dispersion of peel strength is little, and a peeling property is stabilized by a method where in in the cover tape, an intermediate layer stuck to a biaxially oriented film via an adhesive layer, a heat sealant layer, and an electrostatic diffused layer containing a bis ammonium organic sulfur semiconductor are in order stuck to each other. SOLUTION: This cover tape 1 capable of being heat sealed to a carrier tape is formed wherein an intermediate layer 5 stuck to a biaxially oriented film 2 via an adhesive layer 3, a heat sealant layer 5, and an electrostatic diffused layer 7 containing a bisammonium organic sulfur semiconductor are stuck to each other. The intermediate layer 5 controls an action wherein the cover tape is uniformly close stuck to the carrier tape when they are heat sealed, and adhesive strength of the intermediate layer 5 to the heat sealant layer 6. Further, the bisammonium organic sulfur semiconductor contained in the electrostatic diffused layer 7 is noncolored transparent, does not depend on temperature, has an excellent electrostatic preventive property to give the cover tape 1 an antistatic property, and has visibility of contents without influencing on the heat seal property.</p> |
