| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide the manufacturing method of a heat resistant transparent composite sheet, provided with prominent resistance to heat as well as transparency and, especially, capable of preventing color change, whitening and deformation even after hot-water treatment, while prominent in secondary workability as well as recycling property, and a food vessel, formed of such a multi-layered sheet. SOLUTION: A heat resistant transparent composite sheet is manufactured by forming one sheet of polyethylene terephthalate sheet, two sheets of polyethylene naphthalate sheet and two sheets of polycarbonate sheet respectively, then, two sheets of the polyethylene naphthalate intermediate layer sheets are arranged on the center layer of the polyethylene terephthalate sheet and the outside layer sheets of two sheets of the polycarbonate sheets are arranged on the outside of the polyethylene naphthalate intermediate layer sheets to laminate these three kinds and five layers sheets continuously. A food vessel is formed of a multi-layered sheet, manufactured by this manufacturing method.</p> |
