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Chemical Etching of Glass Reinforced Polymers

IP.com Disclosure Number: IPCOM000087414D
Original Publication Date: 1977-Jan-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Anderson, CW: AUTHOR [+3]

Abstract

A glass reinforced polymer bearing such as glass fiber reinforced polycarbonate, affords strength, but normally induces high rates of wear in the contacting surface material caused by exposed glass fibers. This disability may be overcome by immersing a glass fiber reinforced polycarbonate bearing in concentrated hydrofluoric acid for 15 minutes at room temperature. The concentrated hydrofluoric acid dissolves the glass fibers exposed at the surface of the bearing to remove the abrasive material that would otherwise be present at the bearing surface.

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Chemical Etching of Glass Reinforced Polymers

A glass reinforced polymer bearing such as glass fiber reinforced polycarbonate, affords strength, but normally induces high rates of wear in the contacting surface material caused by exposed glass fibers. This disability may be overcome by immersing a glass fiber reinforced polycarbonate bearing in concentrated hydrofluoric acid for 15 minutes at room temperature. The concentrated hydrofluoric acid dissolves the glass fibers exposed at the surface of the bearing to remove the abrasive material that would otherwise be present at the bearing surface.

This processing technique may be utilized with any glass-filled polymer that is inert with respect to hydrofluoric acid.

This technique is effective both with regard to bearing parts and such glass reinforced parts where frequent contact induces wear that results in the formation of glass debris. Such debris ultimately damages the associated mechanism by, for example, causing misregistration in a badge reader using an untreated glass reinforced polymer housing.

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