METHOD FOR MANUFACTURING POLYURETHANE FOAM

PROBLEM TO BE SOLVED: To provide a method for manufacturing polyurethane foam that can obtain an excellent foam condition without cell dry spots even if thinning the thickness of the polyurethane foam in manufacturing the polyurethane foam by a closed molding method. SOLUTION: The method for manufac...

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Bibliographische Detailangaben
Hauptverfasser:	SAKAMOTO MEGUMI, KAZAMI TOSHIO, NISHIBORI RYUTARO
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS 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
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method for manufacturing polyurethane foam that can obtain an excellent foam condition without cell dry spots even if thinning the thickness of the polyurethane foam in manufacturing the polyurethane foam by a closed molding method. SOLUTION: The method for manufacturing the polyurethane foam includes injecting a polyurethane foam raw material P containing polyol, polyisocyanate, a chain extender, a foaming agent, a catalyst and a foam stabilizer, into a closed mold 11, and opening the mold 11 after foaming, to remove the polyurethane foam. The chain extender includes both tolylenediamine and tertiary amino alcohol, the catalyst includes a tertiary amine catalyst, and polyisocyanate includes modified MDI. After injecting the polyurethane foam raw material P, halfway opening is performed to open the mold 11 in the closed state for 0.5-5 seconds before the removal of the form, and then closed until the removal of the foam. COPYRIGHT: (C)2011,JPO&INPIT