THREE STAGE COOLING OF POROUS MATERIALS

A process for rapidly cooling porous foam material to prevent oxidation or autoignition of said foam. The process includes a first cooling step wherein cooled ambient air is drawn through the foam block (1) thereby cooling, dehumidifying and removing fumes from said block before being vented, a seco...

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Bibliographische Detailangaben
Hauptverfasser:	RICCIARDI, MICHAEL, A, DAI, DZUNG, G
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 GENERAL PROCESSES OF COMPOUNDING GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS 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 TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS 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:	A process for rapidly cooling porous foam material to prevent oxidation or autoignition of said foam. The process includes a first cooling step wherein cooled ambient air is drawn through the foam block (1) thereby cooling, dehumidifying and removing fumes from said block before being vented, a second cooling step wherein cooled ambient air is drawn through the block condensed and redeposited within the block, for further cooling thereof, with sublimates in the block, and a third cooling step wherein ambient air is drawn through the material so as to remove remaining fumes, heat and moisture therefrom. The process of the present invention advantageously utilizes a foam formulation which includes an increased percentage of water for providing adequate foaming of the material while minimizing or obviating the need for including toxic auxiliary blowing agents in the formulation. In addition, the formulation may also have a lower TDI index as compared to formulations utilized in conventional cooling methods because TDI is condensed and recycled back into the foam. An apparatus especially configured and adapted for practicing the process of the present invention is also disclosed. L'invention concerne un procédé de refroidissement rapide d'un matériau mousse poreux afin d'empêcher l'oxydation et l'autoallumage de ladite mousse. Le procédé comprend une première étape de refroidissement au cours de laquelle de l'air ambiant refroidi est aspiré à travers le bloc de mousse (1) pour refroidir, dessécher et éliminer les fumées du bloc de mousse avant de l'éventer, une seconde étape de refroidissement au cours de laquelle de l'air ambiant refroidi est aspiré à travers le bloc condensé puis redéposé dans le bloc afin de le refroidir davantage, avec des sublimés dans le bloc et une troisième étape de refroidissement au cours de laquelle de l'air ambiant est aspiré à travers le matériau mousse de manière à éliminer les fumées, la chaleur et l'humidité restantes. Le procédé de la présente invention utilise de manière avantageuse une formulation de mousse qui comprend un pourcentage accru d'eau pour effectuer un moussage adéquat du matériau tout en réduisant au minimum ou en éliminant le besoin d'incorporer des agents toxiques auxiliaires de soufflage dans la composition. De plus, la composition peut également avoir un indice TDI plus bas que celui des compositions utilisées dans des procédés classiques de refroidissement étant donné que TDI (diisocyanate de toluène) est c