Product containing high density skins on a low density core and

Details Product containing high density skins on a low density core and Product containing high density skins on a low density core and

1978-02-27

1979-11-20

Ives, P. C.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including variation in thickness

428218, 428301, 428236, 428526, 428531, 156 622, 156 628, 156285, 156331, B32B 514, B29J 504

Patent

active

041751485

ABSTRACT:
A fiberboard is manufactured having relatively high density skins on a relatively low density core by including a skin forming chemical in at least the surface fibers of a consolidated mat, having a density of less than 35 pounds per cubic foot, and then hot-pressing the consolidated mat at a temperature of at least 525.degree. F. to form a board having high density surface skins.

REFERENCES:
patent: 1663503 (1928-03-01), Mason
patent: 1663504 (1928-03-01), Mason
patent: 1663506 (1928-03-01), Mason
patent: 1812969 (1931-07-01), Mason
patent: 1953832 (1934-04-01), Sandell
patent: 3062699 (1962-11-01), Raphael et al.
patent: 3699203 (1972-10-01), Oshima et al.
patent: 4007076 (1977-02-01), Clarke et al.

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