A PROCESS FOR THE PREPARATION OF AUXETIC FOAMS

A process for the preparation of thermoplastic auxetic foams comprising the steps of : a) taking conventional thermoplastic foam; b) subjecting said foam to at least one process cycle wherein the foam is biaxially compressed and heated; c) optionally subjecting the foam to at least one process cycle...

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Bibliographische Detailangaben
Hauptverfasser:	ALDERSON, KIM, LESLEY, SMART, GILLIAN, MARY, ALDERSON, ANDREW, DAVIES, PHILIP, JOHN
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	A process for the preparation of thermoplastic auxetic foams comprising the steps of : a) taking conventional thermoplastic foam; b) subjecting said foam to at least one process cycle wherein the foam is biaxially compressed and heated; c) optionally subjecting the foam to at least one process cycle wherein the biaxial compression is removed and the foam mechanically agitated prior to reapplying biaxial compression and heating; d) cooling said foam to a temperature below the softening temperature of said foam; and e) removing said compression and heat. L'invention concerne un procédé de fabrication de mousses auxétiques thermoplastiques comprenant les étapes suivantes : a) obtenir une mousse thermoplastique classique ; b) soumettre ladite mousse à au moins un cycle de procédés selon lequel la mousse est comprimée biaxialement et chauffée ; c) soumettre éventuellement la mousse à au moins un cycle de procédés selon lequel la compression biaxiale est supprimée et la mousse est agitée mécaniquement avant de réappliquer la compression biaxiale et de chauffer ; d) refroidir ladite mousse à une température inférieure à la température de ramollissement de ladite mousse ; et) supprimer la compression et le chauffage.