Method of preparing polyvinyl chloride sheets for membrane press forming

A method for preparing polyvinyl chloride sheets for membrane press forming which comprises contact bonding of a preheated first polyvinyl chloride sheet on the heating drum, contact bonding of at least one other layer of preheated polyvinyl chloride sheet thereon, contact bonding of a transfer film...

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Bibliographische Detailangaben
Hauptverfasser:	KASAHARA, YASUO
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	A method for preparing polyvinyl chloride sheets for membrane press forming which comprises contact bonding of a preheated first polyvinyl chloride sheet on the heating drum, contact bonding of at least one other layer of preheated polyvinyl chloride sheet thereon, contact bonding of a transfer film thereon and embossing by emboss-roll thereon, wherein said transfer film has a laminated structure comprising a polyester film, a release coat layer, a resin coat layer and a hot melt coat layer successively from the surface layer. The method of the present invention provides a sheet for membrane press forming which has excellent stain and scratch resistance. Furthermore, after this sheets is subjected to overlay-laminate forming on materials such as plywood and the like, splendid forms can be obtained without surface cracks caused by expansion.