POLYESTER SHEET

摘要

PURPOSE:To provide a sheet of superior tensile strength, rigidity and impact strength and having biodegradability in the case of burying the sheet in soil or the like. CONSTITUTION:A sheet is manufactured and molded by aliphatic polyester as a main component having a melt viscosity of 1.0X10<3>-1.0X10<6> poise at the temperature of 190 deg.C and shearing speed of 100sec and a melting point of 70-190 deg.C. Thus the sheet with biodegradability in which the burning heat development amount is lower compared with polyethylene or polypropylene when being burnt and which is of superior rigidity and impact strength is manufactured. Also when the sheet is stretched, mechanical strength of every kind and transparency thereof are still superior. The sorption of perfumes into the sheet is little, and the sheet is of good heat sealabilities. and moldabilities.