A method of moulding a composite article having an adhesion preventing surface layer

A method of moulding a composite article 2 having an adhesion preventing surface layer 4 and a substrate layer of a mouldable material 6, comprises the steps of firstly introducing a compatibiliser compound into either a stock of the mouldable material or the surface layer material. The two material...

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Bibliographische Detailangaben
Hauptverfasser:	GORDON SMITH, JOANNE EMMA SPARKS
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHARACTERISTIC FEATURES OF FOOTWEAR DEVICES OR ARRANGEMENTS RELATED TO TYRES FOOTWEAR HUMAN NECESSITIES LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM PARTS OF FOOTWEAR PERFORMING OPERATIONS PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE REPAIRING, OR CONNECTING VALVES TO, INFLATABLE ELASTIC BODIESIN GENERAL SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TRANSPORTING TYRE CHANGING OR REPAIRING TYRE INFLATION VEHICLE TYRES VEHICLES IN GENERAL WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	A method of moulding a composite article 2 having an adhesion preventing surface layer 4 and a substrate layer of a mouldable material 6, comprises the steps of firstly introducing a compatibiliser compound into either a stock of the mouldable material or the surface layer material. The two materials are then brought into contact in a mould under conditions of heat and pressure so that the mouldable material reacts with the material of the surface layer to form a chemical bond at their interface 18 under the influence of the compatibilser compound. The mouldable material may be polyurethane, a polyolefin, or a natural rubber, and the compatibiliser compound may be maleic anhydride. Preferably the adhesion preventing layer material is PTFE or a silicone material. The moulded article formed may have a gripping surface configured to prevent mud from sticking to it. For instance the moulded article may be the sole of a wellington boot, or a shoe, or the tread 26 of a tyre for a mountain bicycle, wheeled vehicle, or tracked vehicle having grooves 28. The method of moulding may include injection, compression or extrusion techniques.