Product and process relating to hardboard
AssigneeManville Service Corporation
InventorFred L. Jackson
Life of this patent
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Abstract
A novel economical hardboard is provided which comprises (a) about 1-40 wt % of a porous additive having a particle size in the range of about 0.1-2 mm; (b) about 65-97 wt % of cellulose fibers; (c) about 2-5 wt % binder; and (d) about 1-4 wt % wax. Also provided is an efficient economical process for the production of the above described inventive hardboard comprising the steps of formulating an aqueous mixture of the above ingredients, then dewatering the aqueous mixture, and finally heating the mixture at a temperature and time sufficient to cure the binder.
Claims24
A hardboard material comprising:
- (a) about 1-40 wt % of a porous additive having a particle size in the range of about 0.1-2 mm;
- (b) about 65-97 wt % of cellulose fibers;
- (c) about 2-5 wt % binder;
- and
- (d) about 1-4 wt % wax.
An improved process for the production of hardboard comprising the steps of:
- (a) forming an aqueous mixture comprising about 1-10% wt% solids, the solids portion of said mixture comprising the following ingredients:
- (i) about 1-10 wt % of a porous additive having a particle size in the range of about 0.1-2 mm;
- (ii) about 65-97 wt% of cellulose fibers;
- (iii) about 2-5 wt % binder;
- (iv) about 1-4 wt % wax;
- (b) thereafter, dewatering the aqueous mixture of (a) above;
- and
- (c) heating the dewatered mixture formed in (b) above at a temperature and for a time sufficient to cure said binder.
Dependencies are inferred from the claim text.