Method of reducing the formaldehyde emission of a mineral fiber product, and mineral fiber product with reduced formaldehyde emission
AssigneeRockwool International A/S
InventorsErling Lennart HANSEN, Lars Naerum, Povl Nissen
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Abstract
A method of reducing the formaldehyde emission of a mineral fiber product bonded with a urea-modified phenol-formaldehyde resol resin-type binder comprises adding dextrose to the binder composition during and/or after preparation of the binder composition but before curing of the binder composition applied to the mineral fibers.
Claims20
A method of reducing the formaldehyde emission of a mineral fiber product bonded with a urea-modified phenol-formaldehyde resol resin-type binder composition, wherein the method comprises adding dextrose to the binder composition during and/or after preparation of the binder composition but before curing of the binder composition applied to the mineral fibers.
A method of scavenging formaldehyde in a urea-modified phenol-formaldehyde resol resin-type binder composition for a mineral fiber product, wherein the method comprises adding to the binder composition dextrose as a formaldehyde scavenger.
An apparatus for making a mineral fiber product having reduced formaldehyde emission and being bonded with a cured dextrose-containing urea-modified phenol-formaldehyde resol resin-type binder composition, wherein the apparatus comprises
- a device for fiberizing a mineral melt into mineral fibers,
- separate tanks for the binder composition and dextrose;
- a device for mixing the binder composition and the dextrose,
- a device for applying a mixture of binder composition and dextrose to the mineral fibers,
- a collection chamber for the mineral fibers having the mixed binder composition and dextrose applied thereto,
- a curing oven for curing the mixed binder composition and dextrose applied to the mineral fibers to form a cured web, and
- a device for confectioning the cured web to a mineral fiber product.
Dependencies are inferred from the claim text.