B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 70/02 (2006.01) A47K 3/00 (2006.01) B29C 70/48 (2006.01) B29C 70/86 (2006.01) B29C 67/12 (1990.01)
Patent
CA 2078782
A polymeric composite structure having a configuration of a bathtub and a process of manufacturing the structure is disclosed. The polymeric composite structure includes an acrylic shell (12) and a plastic molded backing layer (14) which is bonded to a non-finish side (21) of the acrylic shell. A fiber reinforced resin layer, preferably fiberglass, is adhered to the non-finish side of the acrylic shell. A weight bearing reinforcing structure (16), such as chip-board, is adhered to the non-finish side of the shell (21) and to the fiber reinforced layer embedded within the molded polymeric backing layer. The molded polymeric backing layer (14) is made from a cross-linked thermosetting polymer, preferably a polyester blend, which does not contain isocyanate. The backing is bonded to the non-finish side of the shell and surrounds the fiber reinforcing and weight bearing reinforcing structures (16). The fiber reinforcing layer is bonded to the shell by a silane based coupler. The backing layer also includes a curing promoter, a peroxyde cross-linking promoter and a filler such as calcium carbonate, sand or other fillers. The composite structure is manufactured by a, process which includes preforming an acrylic shell, reinforcing a non-finish side of the acrylic shell with a resinous mixture of reinforcing fibers by spray-up and roll-out techniques and arranging the reinforced shell in a mold with a non-finish side covering a reinforcing structure placed below the floor of the shell. An uncured mixture of the thermosetting polymeric backing and promoter is injected into the mold coating the non-finished side of the shell and covering reinforcing fibers and chip-board structure. The thermosetting backing material is cured sufficiently to permit demolding of the composite structure without damage. The shell is preferably primed with a silane based coupler prior to the reinforcing step. In an alternative manufacturing process, the spray-up reinforcing step is replaced by the placement of a fiberous mat within the mold, surrounding the non-finish side of the shell. The fiberous material may include a fiberglass woven or a mat material or it may include a preformed fiberous structure.
Structure composite en polymSre ayant la configuration d'une baignoire et proc'd' de fabrication de ladite structure. La structure composite en polymSre comprend une coquille acrylique (12) et une couche (14) de renforcement moul'e en plastique qui est li'e . un c"t' non fini (21) de la coquille acrylique. Une couche de r'sine renforc'e par une fibre, de pr'f'rence de la fibre de verre, est agglutin'e au c"t' non fini de la coquille acrylique. Une structure de renforcement (16), qui soutient la charge telle qu'un panneau d'agglom'r' est agglutin'e au c"t' non fini de la coquille (21) et . la couche renforc'e par une fibre int'gr'e dans la couche de renforcement de polymSre moul'e. La couche de renforcement de polymSre moul'e (14) se compose d'un polymSre thermodurcissable r'ticul', de pr'f'rence un m'lange de polyester, qui ne contient pas d'isocyanate. Le renforcement est li' au c"t' non fini de la coquille et entoure la structure renforc'e par une fibre et la structure qui soutient la charge (16). La couche renforc'e par une fibre est li'e . la coquille par un copulant . base de silane. La couche de renforcement comprend aussi un promoteur de solidification, un promoteur de r'ticulation de peroxyde et une matiSre de remplissage telle que du carbonate de calcium, du sable ou d'autres matiSres de remplissage. La structure composite est fabriqu'e d'aprSs un proc'd' qui comporte le pr'formage d'une coquille acrylique, le renforcement d'un c"t' non fini de la coquille acrylique avec un m'lange r'sineux de fibres de renforcement selon des techniques de pistolage et de feuilletage et la pose de la coquille renforc'e dans un moule avec un c"t' non fini couvrant une structure de renforcement plac'e au-dessous du fond de la coquille.
Barndt Ronald D.
Kuszaj Karl T.
Willis Jeffery E.
As Canada Ulc
Ridout & Maybee Llp
LandOfFree
Polyester backed acrylic composite molded structure does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Polyester backed acrylic composite molded structure, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polyester backed acrylic composite molded structure will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1646508