The main defects of the dry compound

The main defects of the dry process of composite dry composite is a kind of advantages and disadvantages are the production technology of compound thin film is very outstanding. Dry compound environmental protection are the main disadvantages of poor adaptability, resource consumption, there is safety and health concerns, in addition to the disadvantage of high production cost. ( 1) Environmental adaptability difference after dry process is the basic characteristics of the composite coating, should pass heating dry thoroughly, the solvent evaporation from after all, to make the two base material and composite joint, in the process of production, there are a large number of solvent to eliminate. As is known to all, the classic dry compound is used in the adhesives ester, nitrogen soluble poly ester type adhesives such as glue adhesion agent using ethyl acetate as solvent, therefore in the dry compound, to rule out a large amount of acetic acid ethyl ester ( According to the quantity of glue dry base 3 g/m3, coating liquid concentration 35%, production speed 150 m/min, every dry compound production line emissions from 24 h a day, the amount of ethyl acetate as high as more than 500 kg) , production workshop and the surrounding environment caused serious pollution, so the dry compound process of environmental protection receives increasing attention from environmentalists and insight of the industry. ( 2) Serious resource cost in the process of production of solvent to eliminate is the inherent characteristics of dry compound, solvent emissions of waste a great deal of material, itself is a tremendous waste, and solvent discharge also need to cost a lot of energy, Although you can rely on the far infrared heating, also can rely on hot air heating, but whatever the heating mode inevitably requires huge energy) , a common dry compound production line, its installed capacity in 100 kw or more commonly, in an increasingly tense energy today, a lot of energy consumption is a major defect. ( 3) Health and safety hidden danger big ester type of solvent is Yi Ran explosive substances, esters of solvent used, will naturally cause hidden trouble to the safety of the production workshop. So not only requires explosion-proof measures for all kinds of electric, but also need to strengthen daily fire control work, application of ester solvent, not only because it exists in the workshop, and endanger the health of operators, denier production caused by improper operation or accidental factors in the process of adhesive drying incomplete solvent residual, also on the packaging of pollution caused by the goods such as food, medicine, health all hidden trouble is also a problem that nots allow to ignore. ( 4) Production costs are high dry compound production cost is high, due to resource consumption ( Large amounts of solvent emission, the amount of energy cost) , at the same time for fire protection, production safety explosion protection configuration and maintenance of facilities, configuration and maintenance of the environmental protection facilities, and increase the dry compound a factor in the cost of production. In order to give full play to the dry compound of many inherent advantages, cuts it's a lot of shortcomings, people conduct a lot of development research in recent years and made great achievements, especially the achievements of the adhesive, for cutting dry compound faults, the obvious effect.