| 摘要 |
A method of preparing a waterproof paper box by: providing a silicon rubber coating material having a viscosity about 15000 to 30000 cps and applying the silicon rubber coating material to the surface of a paper sheet material, and then applying a pressure about 2˜3 kg/cm2 to the silicon rubber coating material and the paper sheet material to cause permeation of the silicon rubber coating material into internal fibers of the paper sheet material so that a silicon rubber waterproof film is formed on the surface of the paper sheet material, and then processing the silicon rubber coating material-coated paper sheet material thus obtained into a paper box that has the silicon rubber waterproof film located on the inside.
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