Method of providing a structural shape

Details Method of providing a structural shape Method of providing a structural shape

1973-12-07

1976-02-24

White, Robert F.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264115, 264122, 264DIG17, B29G 700

Patent

active

039404668

ABSTRACT:
A method of providing a structural shape includes starting with waste paper and treating the waste paper in a hammer mill to produce paper fibers. The fibers are put through a screen. The screened fibers are mixed with a binder such as a thermosetting epoxy foaming resin or with a phenolic resin in water in preferred proportions. The water or other solvent is kept to a very small value to provide a relatively dry process. The mixture is then pressed in a geometrical shape under substantial pressure (3 to 600 psi). The pressed mixture is then baked or cured at an elevated temperature (175.degree.F to 375.degree.F) for a predetermined time (three minutes to three hours).

REFERENCES:
patent: 3235530 (1966-02-01), Crouch et al.
patent: 3736221 (1973-05-01), Evers et al.

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