The difference between compound bag and PE bag

The pattern printing of composite plastic bags is relatively complicated, so the effect of printing directly affects the quality of the plastic. The effect of pattern printing is closely related to the plate. Therefore, it is necessary to select a plate making factory with better technology and quality to complete the plate making, so as to avoid causing some trouble to the plastic printing in the future. The printing of polyethylene bags is relatively simple, and film blowing is the most important in the production process, There is a strong technicality in adjusting the specifications of the film, such as the width and the thickness of the film. If the card is not properly stuck, it may cause the film thin guide inspection to be unqualified products or the blown film is too thick, and the money of the excessively thick material will be lost. The machines used for film blowing production are also simple. Most of the machines used for composite bags are controlled by computers, so the accuracy is relatively high. Polyethylene bags and composite bags are not only different in production machines, but also different in materials and inks. Most polyethylene bags use surface printing ink, while composite bags use inner printing ink. Composite bags are printed first and then laminated, so the ink is in the middle of several layers of films, The ink will not pollute the food when the food is loaded. Of course, because the customers are so professional in plastic printing, the water content is also very large. For example, some plastic factories make vacuum bags, and they use PE coextrusion film, which reduces the cost a lot, but the effect is far less than that of nylon,There may be many problems such as air leakage during the use of the customer. Pet transfer film is used for pet, so the air tightness is not so good. The bags filled with light air may leak, and the thickness may not reach the thickness ordered by the customer. There may also be differences in the material. Therefore, the customer should also know some professional knowledge about plastic packaging materials and know the plastic bag processing process. We can have a better understanding of the plastic bag processing.