Plastic and nonmetallic article shaping or treating: processes – With printing or coating of workpiece – Applied to clay – sand – or earthen workpiece
Patent
1977-02-14
1978-09-19
Pavelko, Thomas P.
Plastic and nonmetallic article shaping or treating: processes
With printing or coating of workpiece
Applied to clay, sand, or earthen workpiece
5230914, 5230917, 52612, 264145, 264256, 264333, 264DIG43, 264DIG57, C04B 4104, B28B 116
Patent
active
041155017
ABSTRACT:
A cement panel reinforced with fibers comprising a base plate composed predominantly of inorganic fibers and a cement, an inner waterproof layer of a synthetic resin formed on a surface of the base plate, a coloring material layer composed predominantly of a cement and a pigment and formed on the inner waterproof layer, and a surface waterproof layer of a synthetic resin formed on the coloring material layer. The synthetic resin of the inner waterproof layer, having penetrated into both the base plate and the coloring material layer and solidified, gives a fastener effect, bonding them together. Also disclosed is a method of producing such cement panels comprising the steps of preparing a base plate material from a mixture consisting predominantly of inorganic fibers and a cement, applying a liquid synthetic resin composition to a surface of the base plate material which has started to solidify but is still in a soft state to form an inner waterproof layer thereon, applying a coloring material composed predominently of a cement and a pigment to the inner waterproof layer to form a coloring material layer thereon, pressing the resulting base plate material, and shaping the pressed material, whereby the liquid synthetic resin composition is caused to penetrate into both the base plate material and the coloring material layer. The panels obtained have high freeze-thaw resistance.
REFERENCES:
patent: 2850890 (1958-09-01), Rubenstein
patent: 3295278 (1967-01-01), Muhm
patent: 3439076 (1969-04-01), Loois
patent: 3619457 (1971-11-01), Chandler
patent: 3787545 (1974-01-01), Chandler
patent: 4049874 (1977-09-01), Aoyama
Kubota Ltd.
Pavelko Thomas P.
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