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Title
Verfahren zur Herstellung eines Werkstoffverbundes, danach hergestellter Werkstoffverbund, Formteil aus einem solchen Werkstoffverbund und Verfahren zu dessen Herstellung
Date Issued
2004
Author(s)
Ziegler, M.
Hoffmann, K.
Patent No
1999-19934692
2000-10011331
Abstract
Zur Herstellung eines Werkstoffverbundes aus einem Partikelschaum aus thermoplastischem Kunststoff und wenigstens einer mit diesem verbundenen Schicht werden die vorgeschaeumten Partikel auf eine Temperatur im Bereich der Schmelztemperatur erhitzt und miteinander zu einem Formkoerper verbunden und waehrenddessen oder danach mit der Schicht verbunden. Ein solches Verfahren zeichnet sich dadurch aus, dass ein Partikelschaum aus Polyalkylenterephthalat oder einem Blend aus Polyalkylenterephthalat mit einem niedrigen Kristallitanteil in ansonsten amorpher Phase eingesetzt wird, und dass der Partikelschaum bei der Bildung des Formkoerpers bzw. des Verbundes mit der Schicht und/oder anschliessend daran bei einer die amorphe Phase in einen hoeheren Kristallitanteil umwandelnden Temperatur getempert wird.
DE 10036185 A UPAB: 20010425 NOVELTY - A particulate foam of polyalkyleneterephthalate, or a blend of this with a low crystalline content in a chiefly amorphous phase, is heated and pressed to form a component. During the pressing stage the foam is joined with another layer (3) and/or is tempered at a temperature which converts more of the amorphous phase into a crystalline phase. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: a) a composite material comprising particulate foam (2) and another layer produced by the claimed process; b) a component (5a) molded from the composite material; c) use of the component in vehicles, garden furniture, surf boards, boat bodies, packaging, insulating containers or housings; d) various process for producing the component in which: i) prefoamed polyalkyleneterephthalate particles are heated and pressed into a component, tempered during a cooling stage and a cover layer (3) is laminated on; ii) densely packed foamed particles are heated in a mold and foamed onto the rear of a cover layer in a mold and then cooled during which time the foam is tempered; iii) prefoamed polyalkyleneterephthalate particles are placed in a mold cavity with an intermediate layer (4) comprising PET (polyethyleneterephthalate) fibers and further reinforcing fibers, heated to fuse with the PET fibers, a fluid, solidifiable or curable polymer applied and during a cooling stage the molding is tempered. USE - For the production of lightweight composite materials used in the manufacture of garden furniture, sports equipment, e.g. surfboards, boat bodies, packaging, insulating containers and housings (all claimed) and also for the internal lining components for vehicles. ADVANTAGE - An environmentally friendly composite is produced which achieves a good bond between the foam and outer layer as well as increased temperature resistance and ability to withstand varying temperatures.
Language
de
Patenprio
DE 1999-19934692 A1: 19990723