TRYKBEHANDLING OG LAGRING AF TERMOPLASTISKE HARPIKSSKUM FOER SEKUNDAER EKSPANSION
Method of reducing the density of an essentially closed cell thermoplastic resin foam material by secondary expansion thereof. The method consists in increasing the gas pressure inside the cells, maintaining the increased cell pressure for an extended length of time and thereafter heating the foam m...
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| creator | RUBENS LOUIS CHARLES |
| description | Method of reducing the density of an essentially closed cell thermoplastic resin foam material by secondary expansion thereof. The method consists in increasing the gas pressure inside the cells, maintaining the increased cell pressure for an extended length of time and thereafter heating the foam material to a temperature in excess of its hot plastification temperature in order to bring about secondary expansion thereof. In one example the low-density polyethylene material was expanded to produce a foam having a density of approximately 0.085 g per cm . This foam was then pressurized with nitrogen and subsequently underwent secondary expansion to produce a foam with a density of approximately 0.036 g per cm . |
| format | Patent |
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The method consists in increasing the gas pressure inside the cells, maintaining the increased cell pressure for an extended length of time and thereafter heating the foam material to a temperature in excess of its hot plastification temperature in order to bring about secondary expansion thereof. In one example the low-density polyethylene material was expanded to produce a foam having a density of approximately 0.085 g per cm . This foam was then pressurized with nitrogen and subsequently underwent secondary expansion to produce a foam with a density of approximately 0.036 g per cm .</abstract><edition>3</edition><oa>free_for_read</oa></addata></record> |
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| language | dan |
| recordid | cdi_epo_espacenet_DK517082A |
| source | esp@cenet |
| subjects | 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 METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE 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 |
| title | TRYKBEHANDLING OG LAGRING AF TERMOPLASTISKE HARPIKSSKUM FOER SEKUNDAER EKSPANSION |
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