The influence of air volume of composite film bag

1, the effect of air volume of solvent volatilization in fact is the process of material from high to low concentration diffusion. The stronger the concentration difference, the greater the diffusion effect. So dry hot air to enough wind speed, air volume and air pressure ( Fan air volume, jet slit and air gap are influence of wind pressure) Through the base material, can always maintain the appropriate concentration difference, good drying effect is achieved. 2, into the air volume of wind, wind speed, wind pressure is mainly related to the solvent type and content. 3, must be greater than the exhaust air into the air, generally about 10%, that maintain a negative pressure is beneficial to solvent evaporation, and avoid the oven inside solvent concentration on the high side, reach the explosion limit, caused an explosion of the malignant accident. 4, within the scope of the normal drying temperature, the air volume change on the influence of the drying effect is very big. Air drying effect is good. 5, in and out of the air volume to match. Both to ensure that the exhaust is greater than in the wind, and to ensure that the composite film bags do not produce jitter. Put a piece of composite membrane in FengKouChu, composite membrane moderately drawn into oven, base material without shaking at the same time, in and out of the air volume to match appropriate at this time. 6, return to modest return air in order to energy conservation. But return the solvent concentration is higher, is not conducive to solvent evaporation, and therefore must be moderate. First, solvent concentration is higher in the second section of the oven, return air small as far as possible, with no more than 30% advisable; The third section of the oven in the solvent concentration is low, can reach to 50%.