FIBREGLASS MAT, METHOD AND LAMINATE Russian patent published in 2014 - IPC D04H13/00 

FIELD: chemistry.

SUBSTANCE: described are alkali-resistant fibrous products, laminates and methods of their manufacturing. The said product includes fibres and/or one or more fibre strands, with the most mass of the fibres in a mat being glass fibres and/or one or more strands of the glass fibres, the fibres, fixed together in places, where the fibres and/or one or more strands of the fibres intersect with each other for approximately 10 to approximately 35 wt %, counted per dry weight of the product, in a dry state, a binding agent, containing from 1 to approximately 60 wt % of an ureaformaldehyde binding agent and from approximately 45 to 99 wt % of a melamineformaldehyde binding agent, with bringing the total percent content to 100 and basing on the weight of the binding agent in the said product, fixation of the fibres in the said product. Higher resistance to alkalis is provided.

EFFECT: fibrous mat, fabric or cloth product possesses high resistance to alkali substances, which have pH, at least, 7.5 and especially to a saturated water solution of calcium hydroxide.

17 cl, 6 tbl