| 摘要 |
PROBLEM TO BE SOLVED: To increase the adhesive strength to an article to be adhered, especially to a vinyl chloride wrapping film, and improve the anti-blocking property under a wound state by a method wherein in a heat-sensitive adhesive layer, a natural rubber latex for which a vinyl based monomer is graft-copolymerized, is contained. SOLUTION: A heat-sensitive adhesive generally contains a high molecular resin which is a major component to impart a cohesion/adhesion by heating, a heat-melting substance which melts by heating, and has an action to develop an adhesion to the adhesive, and an adhesion imparting agent to improve the adhesion or the like. For the heat-sensitive adhesive, a natural rubber latex for which especially a vinyl based monomer is graft-copolymerized as a high molecular resin, is used. For the heat-sensitive adhesive, generally, a high molecular resin and a heat-melting substance are made the major components, and desirably, in adhesion imparting agent is further added to them. As the high molecular resin, a natural rubber latex for which a vinyl based monomer is graft-copolymerized, is used, and the adhesive strength to a vinyl chloride wrapping film, or a polyethylene wrapping film is increased, and an blocking property becomes favorable as well. |
