Biodegradable heat shrink agent and method for producing said biodegradable heat shrink material

摘要

PROBLEM TO BE SOLVED: To provide a biodegradable heat-shrinkable material which improves heat resistance and increases a shrinkage ratio.;SOLUTION: This heat-shrinkable material is formed through the following processes: a monomer with an allyl group is added and mixed into a biodegradable aliphatic polyester in a low concentrations; a mixture is molded in a required shape; after that, ionizing radiation is applied in a range of ≥ 1 kGy and ≤150 kGy, so as to cause crosslinking reaction and set a gel content ratio in a range of ≥10% and ≤90%; and after the application of the ionizing radiation, the mixture is stretched while being heated in a range of 60-200°C. The heat-shrinkable material is manufactured in such a manner as to be shrunk in the range of a shrinkage ratio of ≥40% and ≤80%, when heated at a temperature as high as/higher than a temperature in orientation.;COPYRIGHT: (C)2005,JPO&NCIPI