公开(公告)号：US20240269953A1

公开(公告)日：2024-08-15

申请号：US17753562

申请日：2020-09-01

申请人： CIKAUTXO, S.COOP.

发明人： Urko GURMENDI LOSTAO ,  Pablo MARTINEZ ALONSO ,  Miguel Angel RODRIGUEZ PEREZ ,  Leandra OLIVEIRA SALMAZO ,  Alberto LOPEZ GIL

IPC分类号： B32B1/08 ,  B29C35/02 ,  B29C48/00 ,  B29C48/09 ,  B29K105/04 ,  B29K105/24 ,  B29L23/00 ,  B32B5/02 ,  B32B5/18 ,  B32B5/24 ,  B32B25/10 ,  B32B27/12

CPC分类号： B32B1/08 ,  B29C35/0227 ,  B29C48/0012 ,  B29C48/09 ,  B32B5/02 ,  B32B5/18 ,  B32B5/245 ,  B32B25/10 ,  B32B27/12 ,  B29K2105/046 ,  B29K2105/24 ,  B29L2023/225 ,  B32B2266/0214 ,  B32B2266/08 ,  B32B2307/72 ,  B32B2597/00

摘要： Vulcanized tube having at least one foamed layer of elastomer material with a cellular structure with an average cell size in a range between 5 and 200 microns and the number of cells per unit of volume in a range between 1.9×105 and 1.4×109 cells/cm3. To form the tube, a forming device is inserted into an unvulcanized tube obtained in a prior initial stage of extrusion. At least one foaming agent is added to the elastomer material of the foamed layer in the initial stage of extrusion, such that the tube is vulcanized and the foamed layer is also simultaneously foamed. The vulcanizing process is carried out under pressure. Finally, in a stage of removal, the already vulcanized and foamed tube is removed from the forming device.