PRESSURIZATION AND STORAGE OF THERMOPLASTIC RESIN FOAMS PRIOR TO SECONDARY EXPANSION

PRESSURIZATION AND STORAGE OF THERMOPLASTIC RESIN FOAMS PRIOR TO SECONDARY EXPANSION

Thermoplastic resin foam prepared from partly cross-linked olefin polymer and a foaming agent, e.g., azo dicarbon amide, fluorocarbon or gaseous compd., is swollen to reduce the density of the product. This is done by introducting gas into a number of independent bubble structures up to the atmosphe...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
1. Verfasser: RUBENS, LOUIS CHARLES
Format: Patent
Sprache:eng
Schlagworte:
AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
PERFORMING OPERATIONS
SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR
SHAPING OR JOINING OF PLASTICS
TRANSPORTING
WORKING OF PLASTICS
WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Online-Zugang:Volltext bestellen
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:Thermoplastic resin foam prepared from partly cross-linked olefin polymer and a foaming agent, e.g., azo dicarbon amide, fluorocarbon or gaseous compd., is swollen to reduce the density of the product. This is done by introducting gas into a number of independent bubble structures up to the atmospheric press., heating the mixt. up to a temp. higher than the melting point of the foam, cooling and maintaining the mixt. down to a temp. lower than 0 C, and reducing the external press.