| 摘要 |
PROBLEM TO BE SOLVED: To provide mineral-base clay having water resistance and strength enhanced by heating at a low temperature which can be easily heated at a low temperature of 100-180 deg.C by using a commercially available microwave oven or toaster oven and to which water resistance is added and whose strength is made excellent by the heating. SOLUTION: This clay is obtained by kneading the composition consisting of natural mineral product clay, acrylic copolymer emulsion, a pasting agent, filler for preventing shrinkage, fibrous powder and water. The minimum film- forming temperature(MFT) of the acrylic copolymer emulsion is 30-100 deg.C. The kneaded composition is dried naturally at ambient temperature. The dried compact is heated at a low temperature of 100-180 deg.C to extremely enhance the water resistance and strength.
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