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US 12,330,445 B2Granted
Method to produce a building panel and a semi-finished product
AssigneeVälinge Innovation AB
InventorsHans Persson, Marcus Bergelin
Life of this patent
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Abstract
A method to produce a building panel, including: providing a substrate, applying a thermosetting binder in dry form on the substrate for forming a sub-layer, applying a sheet on the sub-layer, and pressing the substrate, the sub-layer and the sheet together to form a building panel, thereby the thermosetting binder of the sub-layer impregnates the sheet from below. Also, a semi-finished product.
Claims23
A method to produce a building panel, comprising
- providing a substrate,
- applying a thermosetting binder in dry form on the substrate for forming a sub-layer,
- controlling the moisture content of the sub-layer when arranged on the substrate,
- applying a sheet on the sub-layer, while the sub-layer is sticky from applied moisture, wherein the sheet comprises one or more of a paper sheet, a non-woven, a woven fibre sheet, or a fibre sheet, and wherein the sheet further comprises pigments and/or fillers, and
- pressing the substrate, the sub-layer and the sheet together to form a building panel, thereby the thermosetting binder of the sub-layer impregnates the sheet,
- wherein controlling the moisture content of the sub-layer comprises:
- controlling adhesion of the sheet to sub-layer by applying moisture to the sub layer;
- and
- controlling flow of the thermosetting binder of the sub-layer.
6 more elements
A method to produce a building panel, comprising
- providing a substrate,
- controlling relative humidity (RH) of ambient air enclosing an application device adapted to apply a thermosetting binder in dry form,
- applying a thermosetting binder in dry form on the substrate by said application device for forming a sub-layer,
- applying a sheet on the sub-layer, wherein the sheet comprises pigments and/or fillers, and
- pressing the substrate, the sub-layer and the sheet together to form a building panel, thereby the thermosetting binder of the sub-layer impregnates the sheet,
- wherein the relative humidity (RH) is 35-60% RH.
3 more elements
A method to produce a building panel, comprising
- providing a substrate,
- applying a thermosetting binder in dry form on the substrate for forming a sub-layer,
- controlling the moisture content of the sub-layer when arranged on the substrate,
- applying a sheet on the sub-layer, while the sub-layer is sticky from applied moisture, wherein the sheet comprises one or more of a paper sheet, a non-woven, a woven fibre sheet, or a fibre sheet, and wherein the sheet further comprises pigments and/or fillers,
- pressing the substrate, the sub-layer and the sheet together to form a building panel, thereby the thermosetting binder of the sub-layer impregnates the sheet,
- wherein the sub-layer comprises the thermosetting binder and non-absorbing fillers,
- wherein the sheet comprises a print,
- wherein controlling the moisture content of the sub-layer comprises:
- controlling adhesion of the sheet to sub-layer by applying moisture to the sub- layer;
- and
- controlling flow of the thermosetting binder of the sub-layer.
8 more elements
Dependencies are inferred from the claim text.