POLYPROPYLENE RESIN FOAMED LAMINATED SHEET HAVING BEAUTIFUL APPEARANCE AND PRODUCTION THEREOF

PURPOSE:To obtain a laminated foamed sheet having beautiful appearance low in an open cell ratio and density by laminating a synthetic resin foamed sheet having fine air bubbles on at least one surface of a specific polypropylene resin foamed sheet. CONSTITUTION:A polypropylene resin foamed laminate...

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Bibliographische Detailangaben
Hauptverfasser:	ONO KEIZO, AKUSAWA TERUYOSHI
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS 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 TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain a laminated foamed sheet having beautiful appearance low in an open cell ratio and density by laminating a synthetic resin foamed sheet having fine air bubbles on at least one surface of a specific polypropylene resin foamed sheet. CONSTITUTION:A polypropylene resin foamed laminated sheet having beautiful appearance is constituted by laminating a synthetic resin foamed sheet having air bubbles finer than those of a specific polypropylene resin foamed sheet on at least one surface of the polypropylene resin foamed sheet. The specific polypropylene resin foamed sheet is formed from a mixture of 60-100wt.% of a specific propylene resin (A) and 0-40wt.% of a propylene copolymer resin (B) and the density thereof is set to 0.5-0.25g/cm . The specific resin (A) is set so that a Z average mol.wt. Mz is 2.0X10 and Mz/Mw is 3.0 and contains a branched polymer in its high-molecular region.