Low density frothed mineral wool panel and method

Details Low density frothed mineral wool panel and method Low density frothed mineral wool panel and method

D - Textiles, Paper

21

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92/11, 9/51, 154

D21H 13/38 (2006.01) C04B 26/02 (2006.01) C04B 30/02 (2006.01) D21F 11/00 (2006.01) D21H 13/44 (2006.01) D21H 17/36 (2006.01) D21J 1/20 (2006.01)

Patent

CA 1330291

LOW DENSITY FROTHED MINERAL WOOL PANEL AND METHOD Abstract of the Disclosure A method for the manufacture of very low density mineral wool structural panels on a moving foraminous support wire by frothing a dilute aqueous dispersion of mineral wool is disclosed. The froth, a mass of delicate, non-resilient and nonuniform bubbles among the entangled mineral wool fibers readily breaks, is stripped of water and dried without substantial loss of the highly open, porous structural configuration by a first controlled rate of maturation dewatering followed by brief pulses of high vacuum. Then the open structure is rapidly stripped of remaining water and dried by passing high volumes of heated dry air through the structure with continued vacuum. The drainage water may be recycled in the process to main- tain a low level of binder and any frothing aid additions.

555867

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