RIGID THERMOPLASTIC FOAM DENSIFICATION PROCESS AND COMPOSITE STRUCTURES INCORPORATING THE DENSIFIED RIGID THERMOPLASTIC FOAM

Styrenic polymer foams having one or two densified major surfaces are produced by applying heat and pressure (4) to such surfaces to soften the polymer and collapse cells adjacent to said surface to form a densified skin on such surface. The heated surface or surfaces are then cooled under pressure...

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Bibliographische Detailangaben
1. Verfasser:	D'OTTAVIANO, FABIO
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING BUILDING BUILDING MATERIALS FIXED CONSTRUCTIONS PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS STRUCTURAL ELEMENTS TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	Styrenic polymer foams having one or two densified major surfaces are produced by applying heat and pressure (4) to such surfaces to soften the polymer and collapse cells adjacent to said surface to form a densified skin on such surface. The heated surface or surfaces are then cooled under pressure to form a foam having an undensified core (7) and densified skins (5) on one or both sides. The partially densified foams are especially useful for forming laminates in which the foam forms a core. Adhesion to external layers (30,32) is improved due to the presence of the densified layer.