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.

Abstract: A method of manufacturing a fluffy, lightweight batt of individualized fibers uniformly stabilized in its lofty state comprising applying to one surface of a dense batt of fibers a material capable of being activated to adhere adjacent fibers together. The treated dense batt is comminuted to individualize fibers and the fibers collected in the form of a batt. The batt is further treated to activate the material and stabilize the batt. The resulting product is a lightweight batt of individualized fibers which is stabilized uniformly throughout its depth.

Abstract: A method of manufacturing stabilized, fluffy batts of individualized fibers by treating the surfaces of dense batts of fibers with materials which will react with each other on contact or which can be caused to react with each other by subsequent treatment. The treated dense batt is comminuted or ground to individualize fibers and the fibers collected in the form of a fluffy batt. The materials react with each other on contact or the fluffy batt may thereafter be teated to cause the materials to react. The resulting product is a lightweight, fluffy batt of individualized fibers having reacted materials uniformly distributed throughout the batt to provide the batt with the desired final properties, such as resiliency, absorbency and bulk in a stabilized state.