Summary of the complete process flow for making plastic bags

1. The first equipment necessary for making plastic bags is to blow plastic pellets into a cylinder film – high and low pressure film blowing machine.

Regardless of the material of the plastic bag, you must first blow the plastic pellet into a plastic film to further processing, whether it is PO plastic bags or PE bags or other composite bags. If it is PE bag and PO bag, it must be used high. Low-pressure film blowing machine, if it is a PP bag, you must use a PP film blowing machine. If it is a food packaging compound bag, you must use a co-extrusion film blowing machine! Then the model of the optional machine, the choice of machine model can not be too big or too small, too much waste of electricity, oversized and small, too small to make the corresponding products, so choose the machine to choose the machine that suits your product, the so-called fit is able The bag that meets the maximum width of the bag and can also make its own minimum product width, the blown film machine also needs the sedan industrial electric!

2, printing patterns and text must--printing machine

Selective printing machine: If the bag has printed characters and patterns, it must be equipped with a printing machine. If it is a white bag, it can be used without a printing machine. The printing machine also needs to select the model according to the width of its own bag, and how many products are there. The color needs to rotate a few colors of the printing machine. If the product is relatively large, the bag can be several colors and the printing machine can be selected in several colors. The printing machine is divided into two types, one is the offset printing machine and the other is the copper printing. Machine, their difference lies in: 1, the effect printed by the offset printing machine has no effect of copper printing, the effect of copper printing is very delicate, very delicate, used in some hotel plastic bags, food bags, etc. (according to customer requirements And accept the effect) The effect of the offset printing machine is not as beautiful as that of the copper plate. There will be a little bit of enamel on the side, used for some industrial bags, etc. After considering the product, you can choose 2 colors on the basis of your own product!

3, cutting the film, the last molding - bag making machine

The last step is the bag making machine. What kind of bag making machine is generally used for plastic bags? For example, the courier bag chooses the hot courier bag making machine, the OPP clothing bag hot cut edge bag making machine, the vest bag selects the heat sealing hot bag making machine. The garbage bag is selected as a continuous bag making machine, and the food bag is selected as a three-side sealing bag making machine. The function of the general bag making machine is single, and a bag making machine can not make 4-5 kinds of bags, and the bag making machine also needs to be selected. According to the width of the bag type, the width of the machine is customized. Generally, the machine is selected to consider how wide the bag is, and the bag making machine that can make the maximum width is generally capable of making the bag with the maximum width and the size below.