PROCESS FOR PRODUCING AN OPEN CELL THERMOPLASTIC FOAM

• Main Authors: Haberl, Johannes, Krause, Wenzel
• Format: Patent
• Language: English; French; German
• Published: 18.10.2017
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMISTRY; COMPOSITIONS BASED THEREON; GENERAL PROCESSES OF COMPOUNDING; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

A process for producing a thermoplastic resin foam, comprising at least steps (A) and (B): (A) subjecting a molten thermoplastic resin to a first gas obtained from a first compound at a first temperature; (B) subjecting the foamed resin obtained in step (A) to a second gas obtained from a second compound at a second temperature; wherein the second temperature is above the first temperature.