Compositions, panels and sheets comprising mineral fillers and methods to produce the same

Patent metadata

Field	Value
Publication number	US-10011528-B2
Application number	US-201514876244-A
Country	US
Kind code	B2
Filing date	Oct 6, 2015
Priority date	Oct 10, 2014
Publication date	Jul 3, 2018
Grant date	Jul 3, 2018

Abstract

There are provided gypsum panels, sheets and multi-layer sheets as well as methods of preparation thereof. For example, there are provided cellulose filament-reinforced gypsum panels, sheets and multi-layer sheets and methods of preparation thereof. For example, in such gypsum panels, sheets and multi-layer sheets gypsum is bound with cellulose filaments to strengthen the gypsum panels, sheets and multi-layer sheets. The cellulose filament-reinforced gypsum panel can be, for example, a core comprising a honeycomb or corrugated structure. There are also provided aqueous suspensions comprising cellulose filaments and CaSO 4 .2H 2 O.

First claim

What is claimed is:

1. A gypsum panel comprising a first multi-layer sheet, a second multi-layer sheet and a core comprising a honeycomb or corrugated structure sandwiched between said first multi-layer sheet and said second multi-layer sheet, said first multi-layer sheet, said second multi-layer sheet and said honeycomb or corrugated structure each comprising cellulose filaments and CaSO 4 .2H 2 O.

2. The gypsum panel of claim 1 , wherein said first multi-layer sheet is a facing, sheet and has from 2 to 10 layers.

3. The gypsum panel of claim 1 , wherein said second multi-layer sheet is a backing sheet and has from 2 to 5 layers.

4. The gypsum panel of claim 1 , wherein the density of said gypsum panel is less than about 0.45 g/cm 3 .

5. The gypsum panel of claim 1 , wherein the density of said gypsum panel is from about 0.20 g/cm 3 to about 0.30 g/cm 3 .

Assignees

• Fpinnovations

Inventors

• Dorris Gilles
• Ben Yuxia
• An Qiaozhi
• Dorris Annie
• Wang Xiaoyu

Classifications

• B32B3/12

  characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure · CPC title

• B32B3/28

  characterised by a layer comprising a deformed thin sheet {, i.e. the layer having its entire thickness deformed out of the plane}, e.g. corrugated, crumpled (B32B29/08 takes precedence) · CPC title

• B32B13/04

  comprising such {water setting} substance as the main or only constituent of a layer, {which is} next to another layer of {the same or of} a {different material (next to a glass layer B32B17/06)} · CPC title

• C04B16/12

  characterised by the shape (fibrous macromolecular compounds C04B16/06; porous macromolecular compounds C04B16/08 ){, e.g. perforated strips} · CPC title

• B32B13/02 Primary

  with fibres or particles {being present as additives in the layer} · CPC title