Impregnated, soft, flat gasket and manufacturing method
AssigneeGoetze AG
InventorsHans-Rainer Zerfass, Franz-Josef Giesen
Life of this patent
Estimating the term…
Abstract
An impregnated, soft, flat sealing gasket and a method of manufacturing same which includes the steps of impregnating a fiber mat with a liquid, cross-linkable silicone impregnating agent which includes a cross-linking agent which forms radicals under the influence of heat; heating the silicone-impregnated fiber mat to cause at least partial cross-linking of the silicone impregnating agent; and irradiating the impregnated fiber mat with high energy radiation to cause cross-linking of the silicone impregnating agent present therein, whereby the silicone impregnating agent present in surface regions of the flat sealing gasket is cross-linked to a greater degree than obtainable by thermal treatment alone.
Claims25
In an impregnated soft, flat sealing gasket, including a fiber mat and a silicone impregnating agent;
- the improvement wherein the silicone impregnating agent includes a cross-linking agent which forms radicals under the influence of heat and the silicone impregnating agent has been at least partly cross-linked thereby, and wherein the silicone impregnating agent has been cross-linked in at least one surface region of said flat sealing gasket under the influence of high energy radiation to a greater degree than obtainable by thermal treatment alone.
An impregnated, soft, flat sealing gasket produced by a method of manufacturing comprising the steps of:
- impregnating a fiber mat with a liquid, cross-linkable silicone impregnating agent which includes a cross-linking agent which forms radicals under the influence of heat;
- heating the silicone-impregnated fiber mat to cause at least partial cross-linking of the silicone impregnating agent;
- and
- irradiating the impregnated fiber mat with high energy radiation to cause cross-linking of the silicone impregnating agent present therein, whereby the silicone impregnating agent present in surface regions of the flat sealing gasket is cross-linked to a greater degree than obtainable by thermal treatment alone.
A method of manufacturing an impregnated, soft, flat sealing gasket comprising the steps of:
- impregnating a fiber mat with a liquid, cross-linkable silicone impregnating agent which includes a cross-linking agent which forms radicals under the influence of heat;
- heating the silicone-impregnated fiber mat to cause at least partial cross-linking of the silicone impregnating agent;
- and
- irradiating the impregnated fiber mat with high energy radiation to cause cross-linking of the silicone impregnating agent present therein, whereby the silicone impregnating agent present in surface regions of the flat sealing gasket is cross-linked to a greater degree than obtainable by thermal treatment alone.
Dependencies are inferred from the claim text.