Stock material or miscellaneous articles – Hollow or container type article – Paper containing
Patent
1992-03-12
1996-08-13
Robinson, Ellis P.
Stock material or miscellaneous articles
Hollow or container type article
Paper containing
428 361, 428 362, 428182, 428260, 428262, 428269, 428274, 428286, 428290, 428413, 428414, 428534, 428535, 1621643, 1621686, D21H 1752, B32B 2710, B32B 2908
Patent
active
055454496
ABSTRACT:
Polyether-reinforced fiber-based materials, and methods for their manufacture, are disclosed. A representative material is a sheetlike ply having on one or both faces thereof a polyether-impregnated stratum extending depthwise into the ply thickness dimension no greater than about one-half the ply thickness dimension so as to leave a portion of the ply thickness dimension unimpregnated with polyether. The materials can comprise plural superposed plies wherein at least one ply has at least one polyether-impregnated stratum, such as polyether-reinforced corrugated paperboard. The polyether-reinforced materials have excellent compression strength and foldability. Each polyether-reinforced stratum is made by controllably applying a low-viscosity liquid mixture of an epoxy resin and a hardener, wherein the epoxy resin is substantially non-prepolymerized, to a fibrous web surface, then curing the resin mixture. The polyether-reinforced materials can be folded after curing and are useful for making cartons and other products.
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Dye Rena L.
Robinson Ellis P.
Weyerhaeuser Company
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