METHOD FOR MANUFACTURING FOAMED COMPOSITE SHEET

PROBLEM TO BE SOLVED: To obtain a foamed composite sheet having spindle-shaped cells which are oriented in its thickness direction, developing excellent compression strength, load resistance, bending strength or the like and excellent in surface smoothness with good productivity. SOLUTION: Sheetlike...

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Bibliographische Detailangaben
Hauptverfasser:	TSUJIMOTO NORITAKA, ISHIYAMA MASABUMI
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS GENERAL PROCESSES OF COMPOUNDING 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 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
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To obtain a foamed composite sheet having spindle-shaped cells which are oriented in its thickness direction, developing excellent compression strength, load resistance, bending strength or the like and excellent in surface smoothness with good productivity. SOLUTION: Sheetlike surface materials 2 having strength capable of suppressing the foaming force in the in-plane direction of a foamable sheet 1, which comprises a thermoplastic resin composition containing a thermally decomposable foaming agent, at a time of the heating of the foamable sheet 1 are laminated on both surfaces of the foamable sheet 1 and the formed laminate is held between two upper and lower continuous endless belts 7 and heated to temperature from the melting point of the thermoplastic resin to the decomposition temperature of the foaming agent under pressure to be fused and subsequently heated to higher temperature to foam the foamable sheet 1 and then cooled to temperature not higher than the melting point of the thermoplastic resin.