Panel structure with rigid foam core

B - Operations – Transporting – 32 – B

Patent

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B32B 3/26 (2006.01) B29D 99/00 (2010.01) B29C 70/08 (2006.01) B32B 5/02 (2006.01) B32B 5/16 (2006.01) B32B 5/18 (2006.01) B32B 5/22 (2006.01) B32B 5/26 (2006.01) B32B 5/28 (2006.01) B32B 7/12 (2006.01) B32B 17/02 (2006.01) B32B 27/00 (2006.01)

Patent

CA 2407092

A panel structure (10) includes a rigid foam center core (30) sandwiched between two outer skin fiber layers (20,24). The core is preferably polyurethane, polypropylene, polystyrene and mixtures, as well as polyphenylne oxide and blends. The fiber layers (20,24) may be bi-directional fabric, a unidirectional material or a random weave mat which is impregnated with an epoxy or resin binder. The fibers themselves may fiberglass, polypropylene, Kevlar or carbon. The rigid foam core is thermoplastic polyolefin (TPO), high density polyethylene (HDPE) or acrylonitrile butadieme styrene which are molded into the skin layers (20,24) with peripheral lips (22,26). The lips (22,26) are compressed together and form a peripheral bead or seal (28).

La présente invention concerne une structure (10) de panneau qui comprend un noyau central de mousse rigide (30) pris en sandwich entre deux couches (20, 24) de fibre de parement extérieures. Le noyau est de préférence en polyuréthane, en polypropylène, en polystyrène et en mélanges, ainsi qu'en oxyde de polyphénylène et en mélanges. Les couches (20, 24) de fibre peuvent être un tissu bidirectionnel, ou un matériau unidirectionnel ou un mat à tissage aléatoire qui est imprégné avec un liant de résine ou d'époxy. Les fibres elles-mêmes peuvent être de la fibre de verre, du polypropylène, du kevlar ou du carbone. Le noyau de mousse rigide est un thermoplastique polyoléfinique (TPO), un polyéthylène haute densité (PEhd) ou un styrène butadiène acrylonitrile qui est moulé dans les couches (20, 24) de parement avec des lèvres périphériques (22, 26). Ces lèvres (22, 26) sont comprimées ensemble et forment un cordon ou un joint (28) périphérique.

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