A Method for producing a cushion material for manufacture of seat cushions may extrude a material comprising at least one thermoplastic polymer in an extrusion device, thereby producing a curtain of molten endless fibers, that falls due to gravity. The extrusion device comprising multiple extrusion nozzles that are distributed in a longitudinal direction and in a lateral direction of the extrusion device, and a pressure adjustment arrangement to adjust an extrusion pressure. The Method may receive the curtain of molten endless fibers between two counter-rotating rollers, thereby producing a 3D tangle of irregularly distributed endless fibers which form loops that are fused together. The Method may solidify the 3D tangle by immersion in a cooling liquid.
METHOD AND DEVICE FOR PRODUCING A CUSHION MATERIAL AND CUSHION MATERIAL
2025-06-05
Patent
Electronic Resource
English
IPC: | B29C Formen oder Verbinden von Kunststoffen , SHAPING OR JOINING OF PLASTICS / B29K Index-Schema für Formmassen oder Materialien für Verstärkungen, Füllstoffe oder vorgeformte Teile, z.B. Einlagen in Verbindung mit den Unterklassen B29B, B29C oder B29D , INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS / B29L INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES , Index-Schema für besondere Gegenstände in Verbindung mit Unterklasse B29C / B60N SEATS SPECIALLY ADAPTED FOR VEHICLES , Sitze besonders für Fahrzeuge ausgebildet |
CUSHION MATERIAL, CUSHION TOOL, AND METHOD FOR PRODUCING CUSHION MATERIAL
European Patent Office | 2021
|European Patent Office | 2024
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