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Classification of the material during drying
Classification of the material during drying
Drying process, there are thousands of species of common materials. The materials have different classification methods, but so far not perfect. Typically, in accordance with absorbent materials feature classification.
(A) non-absorbent materials such as sand pores, crushing seven, non-hygroscopic crystalline polymer particles and certain ceramic materials. Characterized in that:
(a) having a porosity of clearly identifiable, when fully saturated by the liquid, the pores are full of liquid grams, and when completely dry, the pores are filled with air;
(b) physical bonding of moisture can be ignored, that is non-absorbent material;
(c) the material does not shrink during drying.
(2) a porous absorbent materials such as clay, zeolite, wood and fabrics. Characterized in that:
(a) having a porosity of clearly identifiable;
(b) physically associated with a large number of water;
(c) often appear in the initial drying stage contraction.
This material can enter - further divided into: capillary absorbent material (large pore radius greater than 0.0007mm and a micro pore radius of less than 0.0007 exists), such as wood, clay, fabric, etc.; strict absorbent material (only Millipore). Such as silica gel, zeolite, keys, and oxidation.
(3) Physical (non-porous) material such as soap, gel, making these polymers (such as nylon) and various food. Characterized in that:
(a) no hole glands, vaporization of moisture on the surface only;
(b) all the liquid are physically bonded.
The classification method is only applicable to homogeneous materials, the moisture in the material which passes continuously.
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