What is the production process of express bags?

1.Mixture

Through the mixer, the required raw materials are fully stirred and evenly mixed according to a certain formula.

According to the different needs of customers, study the material ratio, and put the required raw materials into the mixer to ensure uniform mixing.

2.Blown film

Debug the film blowing machine, and put the mixed material into the hopper of the machine, but the colored material will be suitable for the color first, and the formal production will be made after stabilization, at this time, it is necessary to pay attention to the thickness of the material, size, color, corona treatment and other details.    

The film blowing machine heats and melts the plastic particles and then blows them into a film.

3.Printing

Printing text and patterns using a printing press, a wet plastic bag is placed on the top of the printing plate, and the printing plate and paper are pressurized by the printing machine to transfer the ink from the concave part of the printing plate to the bag.

The printing machine is divided into two kinds, one is the offset printing machine and the other is the copperplate printing machine, their difference is: the effect of the offset printing machine is not as good as the effect of copperplate printing, the effect of copperplate printing is very exquisite, very delicate, used in some hotel plastic bags, food bags, etc. The effect of offset printing machine printing is not as exquisite as that of copperplate, and there will be a little flaw on the edge, which is used for some industrial bags.

4.Bags making

Express bags choose a hot-cut express bag making machine, and use the bag making machine to cut into finished bags.

5.Quality inspection

Always pre-production samples before mass production; Ensure that the products produced meet the customer’s requirements

6.Shipments

copperplate printing machine, their difference is: the effect of the offset printing machine is not as good as the effect of copperplate printing, the effect of copperplate printing is very exquisite, very delicate, used in some hotel plastic bags, food bags, etc. The effect of offset printing machine printing is not as exquisite as that of copperplate, and there will be a little flaw on the edge, which is used for some industrial bags.