Glass fiber-reinforced cement plates

• US 4,335,177 A
• Filed: 09/29/1980
• Issued: 06/15/1982
• Est. Priority Date: 10/03/1979
• Status: Expired due to Term

• Current Assignee: Kurimoto Iron Works Company Limited
• Original Assignee: Kurimoto Iron Works Company Limited
• Inventors: Takeuchi, Shigeru
• Primary Examiner(s): Van Balen, William J.
• Application Number:
  US06/191,801
• Time in Patent Office: 624 Days
• Field of Search: 428/310, 428/703, 428/70, 428/218, 428/246, 428/247, 428/251, 428/284, 428/285, 428/289, 52/309.12, 52/309.17
• US Class Current: 442/244
• CPC Class Codes: B28B 1/522 for producing multi-layered articles B28B1/526, B28B1/527 take precedence
• CPC Class Codes: B28B 1/526 by delivering the materials on a conveyor of the endless-belt type
• CPC Class Codes: B28B 23/0006 the reinforcement consisting of aligned, non-metal reinforcing elements
• CPC Class Codes: B28B 5/027 the moulding surfaces being of the indefinite length type, e.g. belts, and being continuously fed feeding B28B13/02
• CPC Class Codes: C04B 14/24 porous, e.g. foamed glass
• CPC Class Codes: C04B 14/42 Glass
• CPC Class Codes: C04B 20/0072 Continuous fibres
• CPC Class Codes: C04B 2111/00612 as one or more layers of a layered structure
• CPC Class Codes: C04B 28/04 Portland cements
• CPC Class Codes: E04C 2/06 reinforced
• CPC Class Codes: Y10T 156/10 Methods of surface bonding and/or assembly therefor
• CPC Class Codes: Y10T 428/24174 including sheet or component perpendicular to plane of web or sheet
• CPC Class Codes: Y10T 428/24744 Longitudinal or transverse tubular cavity or cell
• CPC Class Codes: Y10T 442/3512 Three or more fabric layers
• CPC Class Codes: Y10T 442/488 Including an additional knit fabric layer

Abstract

This glass fiber-reinforced cement plate is comprised of both outside layers and an intermediate layer interposed therebetween, the former each comprising a glass fiber chopped strand-containing cement layer, the latter comprising a regulated set cement layer.

Claims

1. A laminated, glass fiber-reinforced, hydraulic cement plate, comprising:

a core of hydraulic cement mortar containing regulated set hydraulic cement, said core having two opposite faces;

two laminated layer structures each bonded to a respectively opposite face of said core, each layer structure comprising a first layer of chopped glass fiber strands, said first layer having an inner surface and an outer surface, the inner surface of said first layer being disposed adjacent to the associated face of said core, a second layer of continuous glass fibers, said second layer having an inner surface and an outer surface, the inner surface of said second layer being disposed adjacent to the outer surface of said first layer and a third layer of chopped glass fiber strands, said third layer having an inner surface and an outer surface, the inner surface of said third layer being disposed adjacent to the outer surface of said second layer, said layer structures being impregnated with said mortar and being integral with said core.

2. A cement plate according to claim 1 wherein said core contains chopped glass fiber strands dispersed in said mortar.

3. A cement plate according to claim 1 or claim 2 wherein said layer structures each include a forth layer of continuous glass fibers, said fourth layer having an inner surface and an outer surface, the inner surface of said fourth layer being disposed adjacent to the outer surface of said third layer.

4. A cement plate according to claim 1 or claim 2 wherein said core contains a light insulating material in said mortar.

5. A cement plate according to claim 1 in which said mortar contains Portland cement and regulated set cement and the amount of said regulated set cement is from 5 to 20 parts by weight, per 100 parts by weight of said Portland cement.

6. A cement plate according to claim 5 wherein the weight of said chopped glass fiber strands is from 2 to 6 parts and the weight of said continuous glass fibers is from 3 to 5 parts, both per 100 parts by weight of said Portland cement.

7. A cement plate according to claim 1 wherein said continuous glass fiber layers are woven or knitted net materials having a pitch of about 10 mm.

8. A cement plate according to claim 3 wherein said continuous glass fiber layers are woven or knitted net materials having a pitch of about 10 mm.

9. A cement plate according to claim 1 wherein the thickness of said core is from 40 to 80% of the total thickness of said plate.

10. A cement plate according to claim 1 in which said third layers of said two layer structures are the exposed outermost layers of said cement plate.

11. A cement plate according to claim 3 in which said fourth layers of said two layer structures are the exposed outermost layers of said cement plate.