Articles molded from papermill sludge
AssigneeBoard of Control of Michigan Technological University
InventorsBruce A. Haataja, Anders E. Lund
Life of this patent
Estimating the term…
Abstract
An article, such as a pallet having a substantially flat deck member and a plurality of hollow legs projecting from the deck member, is molded as a one-piece unit from a papermill sludge. Dried, comminuted papermill sludge is blended with a fibrous reinforcing material, preferably a cellulosic material such as fibrous bark particles, and a resinous particle board binder, the resulting mixture of furnish is formed into a loosely fitted mat, and the mat is placed between dyes of a mold and press and compressed to substantially the desired shape under temperature and pressure conditions sufficient to bond the sludge and bark particles together.
Claims8
An article having a major plane and integral non-planar portions displaced from said major plane compression molded from a mixture including about 25 to about 75 weight % of a comminuted papermill sludge containing about 20 weight % or less moisture, about 25 to about 75 weight % of a fibrous, cellulosic, reinforcing material and a resinous particle board binder, said weight percentages being based on the total dry weight of the papermill sludge and the cellulosic material.
Dependencies are inferred from the claim text.