Witten
Neil Witten, Surrey GB
Patent application number | Description | Published |
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20100249255 | FLUOROPOLYMER FOAMS PREPARED WITH THE USE OF BLOWING AGENTS AND APPLICATIONS THEREOF - Fluoropolymer foams are prepared by mixing fluoropolymer resin with blowing agents and additives to produce foamable compounds at temperatures below the activation temperature of the blowing agent. The compounded material is expanded at temperatures above both the softening point of the fluoropolymer resin and the activation temperature of the blowing agent. The resulting fluoropolymer foam can be fabricated into any desired shape, such as pipes, sheets, tapes, blocks and rods, using techniques such as cutting, welding, thermoforming and adhesive bonding. Alternatively the fluoropolymer compound may be expanded directly into the desired shape, for example, by expanding the compound in a mould. | 09-30-2010 |
Neil Witten, Croyden GB
Patent application number | Description | Published |
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20090048356 | PROCESS FOR INTRODUCING A GAS INTO A POLYMER - A first polymer (preferably in granular form) is exposed to a gas at a pressure higher than atmospheric pressure to introduce the gas into the polymer. This occurs at a temperature from the glass transition temperature to the melting temperature when the first polymer is crystalline or semi-crystalline in nature, or at a temperature below the glass transition temperature when the first polymer is amorphous in nature. Optionally, the gas-laden polymer may then be mixed with a second polymer. The polymer is then melted to produce a foamed article. | 02-19-2009 |
20090286895 | SILICONE FOAMS, PROCESS TO MAKE THEM AND APPLICATIONS THEREOF - Closed cell silicone foams are formed by subjecting a silicone base to an inert gas at an elevated pressure, preferably after a pre-curing step, reducing the pressure to allow the base to expand to produce closed cell silicone foam and curing this expanded foam at an elevated temperature. | 11-19-2009 |
Neil Witten, Croydon GB
Patent application number | Description | Published |
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20080207782 | Polyamide Foams, Process to Make Them and Applications Thereof - Closed cell polyamide foams are prepared by subjecting a polyamide resin to inert gases at an elevated pressure and at a temperature above the softening point of the resin and reducing the pressure while the temperature is maintained above the softening point of the resin, resulting in expansion of the resin. | 08-28-2008 |