TUBULAR MOLDING MATERIAL AND HEAT-SHRINKABLE FILM

摘要

DISCLOSED IS A TUBULAR MOLDING MATERIAL HAVING VINYL AROMATIC HYDROCARBON AND CONJUGATE DIENE AS THE PRIMARY COMPONENTS AND HAVING EXCELLENT BUBBLE-FORMING STABILITY IN THE MANUFACTURE OF A HEAT-SHRINKABLE FILM; FURTHER DISCLOSED IS A HEAT-SHRINKABLE FILM WHICH USES SAID MOLDING MATERIAL. (1) A TUBULAR MOLDING MATERIAL CONTAINS A BLOCK COPOLYMER COMPRISED OF VINYL AROMATIC HYDROCARBON AND CONJUGATE DIENE AS THE PRIMARY COMPONENTS.THE TUBULAR MOLDING MATERIAL CONTAINS (A) MICRO-CRYSTALLINE WAX WITH A MELTING POINT AS STIPULATED IN JIS K 2235 OF 75-98 °C, AND (B) A GLYCERIDE FOR WHICH THE AVERAGE DEGREE OF POLYMERIZATION OF THE GLYCERIN BACKBONE IS 1-10 AND THE CARBON NUMBER IS 11-2 1 FOR R FOR THE FATTY ACID ESTER GROUP REPRESENTED BY THE GENERAL FORMULA R-COO-. IN ADDITION, (2) THE TUBULAR MOLDING MATERIAL CONTAINS (1) 0.01-3 PARTS BY MASS OF MICRO-CRYSTALLINE WAX AND (B) 0.01-3 PARTS BY MASS OF GLYCERIDE.