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

1979-11-19

1981-12-15

Hall, James R.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including variation in thickness

264120, 264113, B32B 514

Patent

active

043059899

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. In accordance with another embodiment of the present invention, a skin forming chemical is used to form a skin on higher density mats having a density of 35 pounds/ft..sup.3 or greater. The skin formed on the higher density mats has strength and density properties which are not as significantly different from the core material as is the skin formed over the low density core material of the first embodiment, but the skin on the higher density mats also improves the board strength, stiffness paint holdout and design fidelity properties.

REFERENCES:
patent: 4175148 (1979-11-01), Luck et al.
patent: 4175150 (1979-11-01), Luck et al.

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