Manufacture of articles from an organic material and a water-hardenable mass
AssigneeUniversity of Surrey
InventorDavid J. Hannaht
Life of this patent
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Abstract
A material primarily for replacing asbestos-cement products includes a reinforcing network of continuous, fibrillated organic film and a water-hardened mass such as Portland cement and sand or alternatively gypsum. The organic film may be a polyolefin such as polypropylene or high modulus polyethylene. The reinforcement may be incorporated as a woven or non-woven network. A process for making such a material is also described. The material has, in some respects, superior properties in relation to those of asbestos-cement.
Claims33
An article comprising a water-hardened mass and a continuous network of fabrillated film in the form of a plurality of layers embedded in the water-hardened mass, the volume of film amounting to more than 11/2% by volume of the overall volume of the article and the fibrils of said film providing continuous mechanical and frictional bonding to reinforce the water-hardened mass so that under excess loading the article exhibits multiple fine cracks without rupture.
An article comprising a water-hardened mass and a continuous network of fibrillated organic film in the form of a plurality of expanded, non-woven layers embedded within said mass, the fibrils of said film providing continuous mechanical and frictional bonding to reinforce the water-hardened mass so that under excess loading the article exhibits multiple fine cracks without rupture.
An article comprising a water-hardened mass and a network of fibrillated, high modulus polyethylene film in the form of a plurality of layers embedded in the water-hardened mass, the volume of film amounting to more than 1% by volume of the overall volume of the article and the fibrils of said film providing continuous mechanical bonding to reinforce the water-hardened mass.
A process for the manufacture of articles comprising the steps of providing a supply of water-hardening material, providing a supply of layers of fibrillated organic film network and incorporating one said supply in the other without rotary mixing.
Dependencies are inferred from the claim text.