Fiber cement products and methods for the production thereof
AssigneesEtex Services NV, Etex Building Performance International SAS
InventorsRuben Bordin, Julien Soulhat
Life of this patent
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Abstract
The present invention relates to fiber cement products comprising a first layer, which first layer is covered by at least one second layer, characterized in that said first layer is the top layer and the first layer material has a density of between about 0.4 and about 0.9 g/cm3 inclusive, and at least comprises cement and between 1 wt % and 70 wt % (relative to the total dry weight of said first layer material) of a lightweight filler, and said at least one second layer is the bottom layer and covers only one of the main surfaces of the first layer, thereby forming a bi-layered fiber cement product, wherein the second layer material has a density of between about 0.9 and about 1.4 g/cm3 inclusive, and at least comprises fibers and cement.
Claims19
A bi-layered fiber cement product comprising a first layer, which first layer is covered by a second layer, each said first and second layers having a thickness, wherein
- said first layer is composed of a first layer material having a density of between about 0.4 and about 0.9 g/cm3 inclusive, and comprising cement and between 1 wt % and 70 wt % relative to the total dry weight of said first layer material of a lightweight filler,
- said second layer covers only one of the main surfaces of the first layer,
- the second layer is composed of a second layer material having a density of between about 0.9 and about 1/4 g/cm3 inclusive, and comprising fibers and cement,
- thickness of the second layer is larger than thickness of the first layer, and
- said first layer is an outermost layer having an exposed, outwardly-facing surface and said second layer is a bottom layer and configured for facing a wall substrate.
Dependencies are inferred from the claim text.