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US 2008/0200086 A1Published application
Cementitious boards
AssigneeSaint-Gobain Technical Fabrics Canada, Ltd.
InventorsJohn Frederick Porter, Geraint Roberts
Life of this patent
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Abstract
A cementitious board and methods of making the same are disclosed by a cementitious board including a cementitious core, a plurality of warp yarns and weft yarns and a coating applied to produce a coating weight distribution ratio of less than about 2.0:1, based upon the weight of the resinous coating of the weft yarns, over the weight of the resinous coating on the warp yarns.
Claims14
A reinforced cementitious board comprising:
- (a) a cementitious core;
- and
- (b) a reinforcing fabric disposed on at least one face of said cementitious core;
- said reinforcing fabric including:
- (i) a plurality of warp yarns having a first twist (turns/inch);
- (ii) a plurality of weft yarns having a second twist which is greater than said first twist;
- and
- (c) a resinous coating applied to said reinforcing fabric in a coating weight distribution ratio of less than about 2.0:1 based upon the weight of the resinous coating on the weft yarns, over the weight of the resin on the warp yarns.
5 more elements
A reinforced cementitious board comprising:
- (a) a cementitious core comprising Portland cement;
- and
- (b) a reinforcing fabric disposed generally around and embedded into a portion of said cementitious core;
- said reinforcing fabric being composed of a multifilament yarn-based woven, braided, nonwoven mesh-type, or knitted fabric which includes:
- (i) a plurality of warp yarns having a first twist (turns/inch);
- (ii) a plurality of weft yarns having a second twist, said second twist being greater than said first twist;
- and
- (c) an alkali resistant resinous coating applied to said plurality of warp and said plurality of weft yarns after they have been assembled or laid together, such as to produce a coating weight distribution ratio of less than about 2.0:1 based upon the weight of the resinous coating on the weft yarns over the weight of the resinous coating on the warp yarns.
5 more elements
Dependencies are inferred from the claim text.