Compared with the traditional solvent combination, solvent-free complex has many advantages in reducing costs, improving product quality, environmental protection, production safety and stability, and is a production mode worthy of promotion and having great practical value. Of course, it also has its shortcomings.
Solvent-free composite has three advantages: First, environmental protection - because the adhesive does not contain solvents, the environment will not cause pollution. In addition, solvent-free equipment has a relatively low noise due to its compact structure and reduced drying oven. Second, product quality - due to its lower operating temperature than the solvent type, it does not deform the film at high temperatures. Currently common composite film substrate can be solvent-free adhesive production, and even resistant to 121 ℃ high temperature cooking composite film can also be made by this method; Third, the cost is low - the cost of equipment investment, due to the compact solvent-free compound equipment , Covers an area of significantly less than the solvent-based composite equipment, while the cost of the equipment itself is much lower than the solvent-based equipment, nor the solvent warehouse.
In the use of energy costs, solvent-free motor power than the solvent-based reduction of tens of kilowatts. In personnel costs, solvent-free composite equipment generally only need to configure 1-2 people / Taiwan, while the solvent-based composite equipment you need to configure 2-3 people / Taiwan. In adhesive costs, the amount of glue is only about 2/3 solvent-based, in mass production will reduce production costs. There is also no need to invest in solvent recovery and incineration plants. Fourth, health and safety - solvent-based composite control in any case there will always be the presence of residual solvents, solvent-free compound is to avoid the residual solvent contamination of the contents or cause odor. Safe operation, no risk of fire and explosion and no need of explosion-proof measures due to the solvent-free function.
Solvent-free compound also has the disadvantage that can not be ignored, the adhesive in the coating system to be heated, the coating machine to be insulation; adhesive applicability short period, the effective use of time less than 30min; heavy packaging, medium demanding , Ultra-high temperature sterilization of the product is also difficult to meet the requirements; low initial viscosity, curing a long time; high precision coating.