FLAME RETARDANT HEAT-SHRINKABLE TUBE AND METHOD FOR MANUFACTURING THE SAME

摘要

PROBLEM TO BE SOLVED: To impart excellent expansion processability to a halogen-free flame retardant heat-shrinkable tube and also superb printing property and printability to the surface of the tube. SOLUTION: This tube is constituted of an outer layer composed mainly of a polyolefin resin obtained by adding 100 to 250 pts.wt. of a metallic hydroxide or a metallic hydroxide surface-treated by a silane coupling agent to 100 pts.wt. of a polyolefin resin, and an inner layer composed mainly of a polyolefin resin obtained by adding 100 to 250 pts.wt. of a polyolefin resin obtained by adding 100 to 250 pts.wt. of a metallic hydroxide surface-treated by an anionic surfactant to 100 pts.wt. of a polyolefin resin. The thickness of the outer layer is equivalent to 50% or lower of the overall thickness. A magnesium hydroxide is preferably used as the metallic hydroxide. COPYRIGHT: (C)2004,JPO