| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a container for cosmetics or medicine superior in transparency, ultraviolet ray shielding property, formability and chemical resistance. SOLUTION: This container is a polyester composition which comprises specific polyethylene naphthalene dicarboxylate (A) and specific polyethylene terephthalate (B), whose compatibility degree is 0.15-0.50, and whose 2,6-naphthalene dicarboxylic acid unit content is 30 mol% or more to the acid content in the polyester composition, and whose melting point Tm ( deg.C) satisfies the formula: when Z<=50: Tm<=254-28×Z/100, when Z>50: Tm<=267-54×(100-Z)/100). (In the formula, Z represents the content (mol%) of ethylene naphthalene dicarboxylate (EN) unit in the polyester composition).</p> |
