Sheet type forming board and formed board products
AssigneeThe Mead Corporation
InventorsJohn N. Cole, David A. Hettel
Life of this patent
Estimating the term…
Abstract
A sheet type forming board for use in heat forming processes without the need for pre-soaking or pre-steaming required of prior hardboard materials. The forming board sheet has at least one layer containing cellulose fibers, a polyolefin, and an inorganic filler. Its moisture content is preferably 4-12%. A multi-layered sheet, wherein plys are joined together, is typically used to achieve the desired thickness and composite sheet composition. The formed products are light weight and have a number of desirable advantages, including rigidity, embossing and graining fidelity, and dielectric processability.
Claims12
A forming board sheet for use in a heat forming process, comprising at least a first layer consisting essentially of (a) cellulose fibers, (b) a solid particulate polyolefin, and (c) an inorganic filler and having a moisture content of between approximately 4-12% by weight, whereby said forming board is easily formable in a conventional hot press without the requirement of pre-soaking and/or pre-steaming.
A formed board comprising a forming board sheet which has been treated by a heat forming process without pre-soaking and/or pre-steaming to produce a shaped structural product, said forming board sheet having at least a first layer consisting essentially of (a) cellulose fibers, (b) a solid particulate polyolefin, and (c) an inorganic filler and having a moisture content of between approximately 4-12% by weight.
Dependencies are inferred from the claim text.