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US 4,022,861 AGranted
Methods of manufacturing water-repellent fluffy batts of wood pulp fibers
AssigneeJohnson & Johnson
InventorYvon George Levesque
Life of this patent
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Abstract
A method of manufacturing a water-repellent, fluffy lightweight batt of wood pulp fibers comprising applying a water-repellent material to a surface of a dry wood pulp board so that the water-repellent penetrates through only a portion of the board. The treated board is ground to individualize the fibers, and the ground fibers are collected in a batt with the water-repellent treated fibers distributed uniformly throughout to produce a fluffy, water-repellent batt of wood pulp fibers.
Claims3
A method of manufacturing a water-repellent, fluffy, lightweight batt of wood pulp fibers comprising:
- providing a prepared hard, substantially dry board of compacted wood pulp fibers, applying to a surface of said board while in a non-aqueous condition between 1/4 and 2% by weight of said board of a water-repellent material, said water-repellent coating the fibers of the surface and extending through between 45 and 95% of the depth of the pulp board, grinding the treated pulp board to individualize and uniformly disperse water-repellent treated fibers and untreated fibers, and collecting the individualized fibers in the form of a lofty, fluffy batt of wood pulp fibers having water repellent material uniformly distributed throughout the batt whereby the entire batt is water repellent.
Dependencies are inferred from the claim text.