Kraft paper bag processing process

kraft paper tote bags is a composite material or pure kraft paper packaging container, non-toxic, tasteless, pollution-free, low-carbon environmental protection, in line with national environmental standards, with high strength, high environmental protection, is one of the most popular environmental protection packaging materials in the world.

kraft paper tote bags is made of wood pulp paper as the base material, the color is divided into white kraft paper and yellow kraft paper, which can be sprayed with a film on the paper using PP material to play a waterproof role, and the strength of the bag can be made of one to six layers according to customer requirements, printing and bag-making integration. The opening and bottom sealing methods are divided into heat sealing, paper sealing and paste bottom.

First, paper treatment

Paper is the main material of kraft paper tote bags, generally using white cardboard or kraft paper. The paper handling process includes cutting and bending. In the cutting process, attention should be paid to maintaining the sharpness of the tool, the incision should be smooth, and the edge should not be broken. When bending, it is necessary to follow the natural bending direction of the paper, otherwise it will deform the kraft paper tote bags.

Two, printing

The pattern and text on the kraft paper handbag need to be processed by printing. Common printing methods include lithography, gravure printing, screen printing and so on. The choice of printing method needs to be comprehensively considered according to the complexity of the pattern, the number of colors, and the manufacturing cost.

Three, die cutting

Die cutting is the step of cutting paper into kraft paper tote bags in a specific shape. The production of the die cutting mold is crucial and must precisely conform to the size, shape and curvature of the kraft paper tote bags. The die-cut paper also needs to be flattened and bent so that it can be bonded smoothly.

Four, bonding

The adhesion of kraft paper tote bags is divided into glue and hot melt. Glue can be non-toxic and tasteless, but the production cycle is long, and hot melt is high production efficiency but easy to crack. The amount of glue and temperature should be strictly controlled during bonding to ensure the firmness of bonding.

5. Assembly

The final step is assembly. Assemble the parts of the kraft bag in order. Assembly pliers, pencils, erasers, lead, etc. help in the assembly process.