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US 4,735,996 AGranted
Shaped article of fluorocarbon polymer having adhesive surface
AssigneeToray Industries, Inc.
InventorsItsuo Nagai, Kenji Hatada, Hiroaki Kobayashi
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AssigneeToray Industries, Inc.
InventorsItsuo Nagai, Kenji Hatada, Hiroaki Kobayashi
Estimating the term…
The present invention provides with a shaped article of a fluorocarbon polymer having a fluorine/carbon ratio of 1.9 to 2.0, in which at least a part of surface has a fluorine/carbon ratio of 0.8 to 1.8. The shaped article has an improved adhesive properties, especially heat-sealing adhesive property and can be manufactured by a low-temperature plasma treatment of the surface of the fluorocarbon polymer shaped article. As compared with conventional surface-reformed ones, the fluorocarbon polymer shaped article of this invention has an improved adhesive property, especially for heat-sealing, which is not deteriorated during their storage either at a high temperature, at a high humidity or on exposure to ultraviolet ray.
A shaped article of a fluorocarbon polymer having essentially no hydrogen attached to carbon and having a shaped solid body portion having a fluorine/carbon ratio (F/C) of from 1.9 to 2.0 characterized in that at least a part of a surface portion of said article layer is an adhesive surface portion that has a composition different than that of the body portion and has a surface in which the fluorine/carbon ratio is from 0.8 to 1.8, and in which the oxygen/carbon ratio is equal to or less than 0.2-0.09 times (F/C).
Dependencies are inferred from the claim text.