Abstract

A waterproof architectural element comprising an elongated panel member composed of compressed fibrous material having a first planar surface and an opposed second planar surface. At least one elongated cellulose layer is composed of Kraft paper having paper basis weight between 30 and 90 pounds and an average thickness between 0.003 and 0.009 inches. The elongated substrate has a first planar face and an opposed second planar face. A polymeric layer overlies at least a portion of the first planar face of the elongated substrate and comprises a polymeric blend of between 50 and 80 wt. % styrene butadiene copolymer and 0.2 and 3 wt. % of a cellulose ether compound. The cellulose ether compound comprises hydrogen or an alkyl group selected from the group consisting of methyl, ethyl, hydroxyethyl, hydroxypropyl carboxymethyl, hydroxyethyl methyl, hydroxypropyl and between 30 and 50 wt. % calcium carbonate and water.

IPC Classes  ?

• D21H 21/20 - Wet strength agents
• C09D 7/40 - Additives
• C09D 7/61 - Additives non-macromolecular inorganic
• C09D 7/63 - Additives non-macromolecular organic
• C09D 125/10 - Copolymers of styrene with conjugated dienes
• C09D 147/00 - Coating compositions based on homolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bondsCoating compositions based on derivatives of such polymers
• D21H 19/38 - Coatings with pigments characterised by the pigments
• D21H 19/46 - Non-macromolecular organic compounds
• D21H 19/52 - CelluloseDerivatives thereof
• D21H 19/58 - Polymers or oligomers of diolefins, aromatic vinyl monomers or unsaturated acids or derivatives thereof
• D21H 19/64 - Inorganic compounds
• D21H 19/66 - Coatings characterised by a special visual effect, e.g. patterned or textured
• D21H 27/34 - Continuous materials, e.g. filaments, sheets or nets

Abstract

An efficient method and apparatus for making a compressed structural fiberboard from agricultural fibrous matter. The method and apparatus provides a conveyor having variable drives for carrying the agricultural fibrous matter; a hopper having variable drives for conditioning and delivering the agricultural fibrous matter to an extruder; the extruder having a cyclic ram with linear actuators and a floating plate to drive the cyclic ram between an extended position, wherein the agricultural fibrous matter is compacted into the compressed structural fiberboard, and a retracted position, wherein the agricultural fibrous matter is delivered to the extruder; synthetic oil heaters for heating the compressed structural fiberboard; a heat sink track cooler for cooling the compressed structural fiberboard; and a water jet cutting system for cutting the compressed structural fiberboard into individual boards.

IPC Classes  ?

• B30B 11/26 - Extrusion pressesDies therefor using press rams
• B30B 15/08 - Accessory tools, e.g. knivesMountings therefor
• B30B 15/26 - Programme control arrangements
• B30B 15/30 - Feeding material to presses
• B30B 15/34 - Heating or cooling presses or parts thereof
• B27N 3/02 - Manufacture of substantially flat articles, e.g. boards, from particles or fibres from particles
• B27N 3/18 - Auxiliary operations, e.g. preheating, humidifying, cutting-off
• B27N 3/28 - Moulding or pressing characterised by using extrusion presses
• B27N 7/00 - After-treatment, e.g. reducing swelling or shrinkage, surfacingProtecting the edges of boards against access of humidity