| 摘要 |
PROBLEM TO BE SOLVED: To provide an excellent white polyester film which satisfies a wide-ranging high level of requirement such as flexibility, cushioning properties, curl resistance, crease resistance and heat resistance. SOLUTION: The white polyester film, which is a polyester film with a specific gravity of 0.7 to 1.2 containing fine bubbles, contains an ionomer. COPYRIGHT: (C)2004,JPO
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