PACKING MEMBER HAVING SURFACE EXCELLENT IN LIQUID REPELLENCY
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United States of America Patent
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Jan 14, 2021
app pub date -
Mar 26, 2019
filing date -
Mar 27, 2018
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Abstract
A packing member which effectively prevents the liquid repellent material from peeling off the surface and which is provided with the surface excellent in liquid repellency without the need of executing any particular means such as surface-roughening work, treatment with a plasma or vapor deposition. The packing member is characterized by having a surface layer of a blend of a base material polymer mixed with a fluorine-containing polymer, the surface layer forming a gradient of fluorine atom concentration in which fluorine atoms are more distributed in the surface than in the interior.
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