公开(公告)号：US10000014B2

公开(公告)日：2018-06-19

申请号：US14906938

申请日：2014-07-17

Applicant: BASF SE

Inventor： Dietrich Scherzer ,  Tim Diehlmann ,  Franz-Josef Dietzen ,  Carsten Sandner ,  Herbert Schall

IPC: B29C65/14 ,  B29C65/82 ,  B29C65/00 ,  B29C65/78 ,  B29K105/00 ,  B29K25/00

CPC classification number: B29C65/1467 ,  B29C65/1412 ,  B29C65/1425 ,  B29C65/1432 ,  B29C65/1483 ,  B29C65/7847 ,  B29C65/8215 ,  B29C66/1122 ,  B29C66/45 ,  B29C66/71 ,  B29C66/727 ,  B29C66/73117 ,  B29C66/7313 ,  B29C66/73161 ,  B29C66/735 ,  B29C66/7352 ,  B29C66/73772 ,  B29C66/73774 ,  B29C66/73921 ,  B29C66/919 ,  B29C66/91933 ,  B29C66/91943 ,  B29C66/939 ,  B29C66/949 ,  B29K2025/06 ,  B29K2105/0026 ,  B29K2025/08 ,  B29K2055/02

Abstract: The present invention relates to a process for the production of at least two-layer thermoplastic foam sheets via thermal welding of at least two thinner thermoplastic foam sheets. In the process of the invention, at least two heating elements are conducted on mutually offset planes between the surfaces to be welded of the thinner thermoplastic foam sheets, and the foam sheets here do not touch the heating elements. The number of layers of the thermoplastic foam sheet is per se a result of the number of thinner thermoplastic foam sheets that are thermally welded to one another. If by way of example three thinner thermoplastic foam sheets are thermally welded to one another, a three-layer thermoplastic foam sheet is per se obtained, and if there are four thinner thermoplastic foam sheets the result is accordingly per se a four-layer thermoplastic foam sheet.

公开(公告)号：US10232556B2

公开(公告)日：2019-03-19

申请号：US15538396

申请日：2015-12-17

Applicant: BASF SE

Inventor： Eckhard Neufeld ,  Carsten Sandner ,  Tim Diehlmann ,  Franz-Josef Dietzen ,  Dietrich Scherzer

IPC: B29C65/14 ,  B29C65/10 ,  B29C65/72 ,  B29C65/00 ,  B29C65/78 ,  B29K101/12 ,  B29K105/04 ,  B29K105/00 ,  B29L7/00 ,  B29L9/00

Abstract: The invention relates to a process for the production of at least two-layer thermoplastic sheets via thermal welding of at least one thinner thermoplastic sheet with density (D1) and of at least one second thinner thermoplastic sheet with density (D2), where the density (D1) of the first thinner thermoplastic sheet is smaller than the density (D2) of the second thinner thermoplastic sheet. The process introduces at least one first heating element and at least one second heating element along mutually offset planes between the two thinner thermoplastic sheets, where the surfaces of the thinner thermoplastic sheets do not touch the surfaces of the heating elements. The first heating element transfers a quantity of energy (E1) to the surface of the first thinner thermoplastic sheet, and the second heating element transfers a quantity of energy (E2) to the surface of the second thinner thermoplastic sheet, where the quantity of energy (E1) is smaller than the quantity of energy (E2).