Method for manufacturing self-adhesive mineral wool pads

A process for manufacturing self-adhesive insulation products based on mineral wool, comprising:

• (a) forming mineral fibers by centrifugation of molten glass or of molten rock,
• (b) spraying, over the mineral fibers, immediately after the mineral fibers have been formed, a first liquid organic binder composition,
• (c) forming a blanket of mineral fibers which are coated with the first liquid organic binder composition, by deposition on a conveyor,
• (d) covering a face of the blanket of mineral fibers with a surfacing mat of glass fibers or of organic fibers having heat resistance,
• (e) heating the blanket of mineral fibers, covered with the surfacing mat, in a drying oven for a period of time and at a temperature sufficient to cure the first liquid organic binder composition,
• (f) applying, to an exposed face of the surfacing mat, a self-adhesive material,
• wherein, after stage (c), a second liquid organic binder composition is applied to the surfacing mat and/or to the face of the blanket of mineral fibers which is intended to come into contact with the surfacing mat, and
• wherein the surfacing mat exhibits, before application of the second liquid organic binder composition, a weight per unit area of between 20 and 100 g/m2.

A process for manufacturing self-adhesive insulation products based on mineral wool, comprising:

• (a) forming mineral fibers by centrifugation of molten glass or of molten rock,
• (b) spraying, over the mineral fibers, immediately after the mineral fibers have been formed, a first liquid organic binder composition,
• (c) forming a blanket of mineral fibers which are coated with the first liquid organic binder composition, by deposition on a conveyor,
• (d) covering a face of the blanket of mineral fibers with a surfacing mat of glass fibers or of organic fibers having heat resistance,
• (e) heating the blanket of mineral fibers, covered with the surfacing mat, in a drying oven for a period of time and at a temperature sufficient to cure the first liquid organic binder composition,
• (f) applying, to an exposed face of the surfacing mat, a self-adhesive material,
• wherein, after stage (c), a second liquid organic binder composition is applied to the surfacing mat and/or to the face of the blanket of mineral fibers which is intended to come into contact with the surfacing mat, and
• wherein a solids content of the second liquid organic binder composition and its total amount applied to the surfacing mat and/or to the face of the blanket of mineral fibers which is intended to come into contact with the surfacing mat, are such that the amount of applied organic binder solids is between 2 g/m2 and 50 g/m2 of insulation product.