Surface bonding in halogenated polymeric components

a technology of halogenated polymer components and surface bonding, which is applied in the direction of decorative surface effects, decorative arts, etc., can solve the problems that halogenated polymer layers are also difficult to bond into composites

Inactive Publication Date: 2006-01-05
FREUDENBERG NOK GEN PARTNERSHIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0007] In one form of the invention, the inert environment is a noble gas. In one form of this, the inert environment is a noble gas at a pressure of less than 0.1 atmospheres. In another form of the invention, the inert environment is nitrogen. In yet another aspect, a vacuum is applied to the etched material surface. In yet another aspect, a static free environment as a space free of static is enabled at the etched material surface.

Problems solved by technology

However, halogenated polymer layers are also challenging to bond into composites.

Method used

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  • Surface bonding in halogenated polymeric components
  • Surface bonding in halogenated polymeric components
  • Surface bonding in halogenated polymeric components

Examples

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Embodiment Construction

[0200] In a first set of Examples, a mixture of tetrafluoroethylene / hexafluoropropylene / vinylidene fluoride emulsion (Dyneon tetrafluoroethylene / hexafluoropropylene / vinylidene fluoride-340C) in aqueous base and epoxy-based aqueous silane solution is formulated to evaluate bonding of etched PTFE and Hytrel type TPE (2022HS grade, polyester-based TPE from DuPont) samples. The epoxy-based aqueous silane solution is prepared by combining epoxy resin (Vantico™ GT grades from Ciba) and polyethylene oxide (PEO) modified silicone copolymer as a coupling agent for the silicone to the epoxy. The 50 / 50 (on a weight basis) mixture of tetrafluoroethylene / hexafluoropropylene / vinylidene fluoride emulsion and epoxy-based silicone solution is applied both to a surface of etched PTFE and to a surface of a Hytrel sample. Eight samples of etched PTFE specimens independently etched either by chemical means (sodium ammonia and sodium naphthalene) or by physical mean (plasma) on the bonding surface of PTF...

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Abstract

Etching the surface (activating the surface) of a halogenated polymer component with an electron beam generates a set of free radical sites in polymeric chains of the surface that sustain for at least 4 hours in an inert environment. The inert environment is provided by a noble gas, nitrogen, a static free space, and/or a vacuum. Items such as dynamic seals, static seals, gaskets, pump diaphragms, hoses, and o-rings all benefit from precursors made according to the technique.

Description

[0001] This invention relates to articles formed from at least one halogenated polymer component having an activated surface. In particular, the present invention relates to activating halogenated polymer component surfaces with radiation. [0002] Composites are important materials in enabling many of the benefits of modern life. Composites provide multilayered structures having individual layers made of metal, polymer, or ceramic. Each layer contributes to the overall performance of the composite as viewed from the intended application. This is especially true of the outside layers of a composite. [0003] Halogenated polymer layers bring useful performance properties to composites. However, halogenated polymer layers are also challenging to bond into composites. What is needed is a way to bond a layer made of halogenated polymer to other materials while retaining the desired properties of the halogenated polymer layer. This and other needs are achieved with the invention. SUMMARY [00...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B44C1/22B29C59/16C08J3/28
CPCC08J2327/12C08J7/123
Inventor PARK, EDWARD HOSUNG
Owner FREUDENBERG NOK GEN PARTNERSHIP
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