| 摘要 |
The viodeotape is composed of a non-magnetic support and a coated layer containing a mixture of a magnetic material, an adhesive and an additive. The magnetic material is CrO2 of which particles have a BET surface area of 15-40 m2/g. The adhesive is prepared from a mixture of vinyl copolymer (a) containing carboxyl and hydroxyl groups and aliphatic polyurethane resin (b) containing hydroxyl group. Polyisocyanate resin additive is mixed with the adhesive by 20-100 wt.% with respect to the amount of adhesive.
|
