Patent ID: 7226522
Filing Date: 2007-06-05
Classification: C03C,D04H,E04B

Abstract:
1. A method of bonding mineral fibres in a mineral fibre product such as mineral wool, the method consisting of the following steps: (1) applying acid to the mineral wool in an amount sufficient to dissolve mineral material from the mineral fibre to form a silica-containing dissolved layer on a surface of mineral fibre; the ph level being equal to or less than 3; (2) arresting the dissolution of the mineral fibre by heating the resultant mineral wool product to evaporate the acid, or by neutralizing the resultant mineral wool product, or by adding a curing inhibitor, preferably an alcohol, such as polyethylene glycol; and, (3) curing a resultant mineral wool product from step 1 to bond the fibres; wherein the silica-containing dissolved layer acts as a binder.