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US 5,631,052 AGranted
Coated cementitious packaging containers
AssigneeE. Khashoggi Industries
InventorsPer J. Andersen, Simon K. Hodson
Life of this patent
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AssigneeE. Khashoggi Industries
InventorsPer J. Andersen, Simon K. Hodson
Estimating the term…
Cementitious containers which have a cementitious structural matrix for use in the packaging, storing, partitioning, and/or shipping of goods. The containers are manufactured from cementitious materials in order to be strong, durable, tough, lightweight, cushioning, insulative, inexpensive, and more environmentally compatible than those currently used in packaging, storing, and/or shipping goods. The cementitious structural matrix of the containers includes a hydraulic cement paste (formed from the reaction of water with, e.g., a portland cement) in combination with a rheology-modifying plasticizer, such as methylhydroxyethylcellulose. Preferred embodiments may also include various aggregate materials, fibrous materials, and air voids, which add the necessary strength while making the product lightweight, and which can provide insulative properties (if desired) at a cost which is economically justified in comparison to conventional paper and polystyrene products. The molded cementitious mixtures generally have sufficient strength in the green (or uncured) state to maintain their molded shape. The cementitious mixtures can be formed into flat sheets having greatly varying thicknesses depending upon the intended use of the container. Corrugated sheets can be made to increase the container strength.
An article of manufacture for storing, dispensing, packaging, portioning, or shipping comprising a container formed from a cementitious structural matrix, said cementitious structural matrix formed from a cementitious mixture comprising a hydraulic cement selected from the group consisting of portland cement, slag cement, calcium aluminate cement, silicate cement, phosphate cement, white cement, high alumina cement, and magnesium oxychloride cement, a rheology modifying agent, and water, the cementitious mixture having a rheology and early green strength during formation of the container such that the cementitious structural matrix of the container is form stable within a period of time of about 10 minutes or less after being positioned into a desired shape of the container, the cementitious structural matrix having a maximum thickness of about 5 mm, a maximum density of about 1.6 g/cm.sup.3, and a coating on at least a portion of the surface of the cementitious structural matrix.
A cementitious container formed from a cementitious structural matrix, said cementitious structural matrix formed from a cementitious mixture comprising hydraulic cement, a rheology-modifying agent and water, wherein the container includes an opening and at least one cementitious flap that is hingedly attached to a cementitious wall and selectably able to at least partially cover the opening, the cementitious structural matrix having a maximum density of about 1.6 g/cm.sup.3 and a coating on at least a portion of the surface thereof.
A cementitious container formed from a cementitious structural matrix, said cementitious structural matrix formed from a cementitious mixture comprising a hydraulic cement, a rheology-modifying agent, and water, the cementitious container including an opening and a removable cementitious enclosure that is selectably able to at least partially cover the opening, the cementitious structural matrix having a density less than about 1.6 g/cm.sup.3 and a coating on at least a portion of the surface thereof.
An article of manufacture comprising a container, at least a substantial portion of said container including a substantially hardened cementitious sheet that has been bent, folded or rolled to form at least a substantial portion of the container, said cementitious sheet being formed from a cementitious mixture including a hydraulic cement, water, fibers, inorganic aggregate, and a rheology-modifying agent, the cementitious sheet having a thickness less than about 3 mm and being characterized in that it may be bent, folded or rolled to significantly mechanically deform the sheet without complete rupture of the cementitious sheet, the cementitious sheet including a coating on at least a portion of the sheet.
Dependencies are inferred from the claim text.