Process for the preparation of auxetic foams
AssigneeAuxetic Technologies Limited
InventorsAndrew Alderson, Kim Lesley Alderson, Philip John Davies, Gillian Mary Smart
Life of this patent
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Abstract
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.
Claims21
A process for the preparation of thermoplastic auxetic foams from conventional thermoplastic 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 to a temperature close to the softening temperature;
- 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.
Dependencies are inferred from the claim text.