Sheets made from moldable hydraulically settable compositions

Details Sheets made from moldable hydraulically settable compositions Sheets made from moldable hydraulically settable compositions

1995-06-07

1997-03-25

McCamish, Marion E.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Noninterengaged fiber-containing paper-free web or sheet...

106400, 106638, 428152, 428167, 428182, 428220, 428294, 4283124, 4283184, 4283193, 428703, 428906, B32B 1302, B32B 1304

Patent

active

056143079

ABSTRACT:
Compositions and methods for manufacturing sheets having a hydraulically settable matrix are disclosed. Suitable compositions are prepared by mixing together a hydraulic binder, water, and appropriate additives (such as aggregates, fibers, and rheology-modifying agents) which impart predetermined properties so that a sheet formed therefrom has the desired performance criteria. The compositions are formed into sheets by first extruding them into a sheet and then calendering the sheet using a set of rollers. The calendered sheets are dried in an accelerated manner to form a substantially hardened sheet. The drying is performed by heated rollers and/or a drying chamber. The hydraulically settable sheets so formed may have properties substantially similar to sheets made from presently used materials like paper, cardboard, polystyrene, or plastic. Such sheets can be rolled, pressed, scored, perforated, folded, and glued. They have especial utility in the mass production of containers, particularly food and beverage containers.

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