Composite machine is generally divided into dry compound and extrusion compound, so let's take a look at the advantages and disadvantages of these two kinds of Composite Machine:

　　1. Dry lamination is suitable for the production of composite films with many varieties and small production, while extrusion lamination is the most suitable for continuous production.

　　2. The cost of dry composite production is high, and the cost of extrusion composite production is relatively low.

　　3. Under normal process conditions, the peel strength (plastic / plastic composite) is generally 1 ~ 3.5n/15min. It is suitable for most products; the peel strength (plastic / plastic composite) of extrusion composite is generally 0.7 ~ 1.5n/15min, which is suitable for general packaging materials.

　　4. The dry lamination uses adhesive, which is easy to produce solvent residue, so it is difficult to control the process to fully meet the sanitary requirements; extrusion composite is basically or only water-based primer, with little coating amount and no solvent residue, so the sanitary performance is good.

　　5. The thickness uniformity of dry composite film depends on the quality of the selected substrate and cannot be adjusted. The thickness uniformity and average thickness of the film can be adjusted by extrusion.

　　6. The dry compound production is easy to operate, and the workers' technical requirements are general; the extrusion compound production operation is more complex and requires higher technical requirements for workers.

　　7. When different products are compounded, the dry compounding technology has little change; the extrusion compounding process needs to be adjusted frequently, which requires higher process requirements.

　　8. Dry compounding has environmental pollution caused by solvent volatilization, safe operation and labor hygiene problems; extrusion compound has problems of high ambient temperature and sometimes smoke.