| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method for improving surface properties of an extrudate of a melt processable fluoropolymer.SOLUTION: A composition comprises a major amount of a first semi-crystalline fluorinated copolymer and a minor amount of a second fluoropolymer effective to reduce melt defects. Each fluoropolymer is selected from polymers (a) to (d), mentioned below. The second fluoropolymer is selected from a category other than the category in which the first fluoropolymer is selected. (a): a semi-crystalline perfluorinated copolymer, (b): a fluoropolymer derived from interpolymerized units of at least one essentially perfluorinated monomer and at least one non-fluorinated hydrogen-containing monomer, (c): a fluoropolymer derived from interpolymerized units of at least one partially-fluorinated monomer, and optionally at least one essentially perfluorinated monomer, and (d): an amorphous copolymer of tetrafluoroethylene and hexafluoropropylene.</p> |
