A method of manufacturing a product using a binder

摘要

A method of manufacturing a product comprises the steps of: i) Providing a collection of non-woven materials in the form of loose matter; ii) Treating the collection of loose matter with a substantially formaldehyde free binder solution having a pH of greater than 6 comprising: a carbohydrate, an acid precursor derivable from an inorganic salt which makes up at least 5% by dry weight of the uncured binder solution, a source of nitrogen and water; iii) Arranging the collection of loose matter treated with the binder solution in the form of a substrate; and iv) Curing the binder by applying a source of energy to the substrate. The product may be a mineral fibre insulation product. The carbohydrate may be dextrose; the acid precursor may be ammonium sulphate.