LDPE express bag production process

LDPE express bag, a widely used packaging product, its raw material is linear low density polyethylene (LDPE) as the main component. The design of this bag is compact, lightweight, easy to wear, with good elasticity and tensile resistance. At the same time, its material is non-toxic and harmless, safe and environmental protection, suitable for food, daily necessities and other products packaging. In addition, the unique design of the express bag also has dust, moisture, shock and other functions, which provides convenience for the transportation and storage of goods. In short, LDPE express bags are an integral part of the modern packaging industry.

1. Preparation of raw materials

The main raw material for the production of LDPE express bags is linear low density polyethylene (LDPE) resin. This resin has excellent flexibility, tensile strength and puncture resistance, making it an ideal material for making express bags. In addition, additives such as antioxidants and UV stabilizers need to be prepared to improve the service life and stability of the product.

2. Ingredients and mixing

LDPE resin and additives are put into the mixer in a certain proportion for full mixing. It is necessary to ensure that the various components are evenly distributed during the mixing process to achieve the best physical properties.

3, extruder extrusion

The mixed raw material is sent into the extruder, and after heating, melting, extrusion and other steps, a continuous tube is formed. The tube will serve as the base material for the delivery bag.

4. Forming and cutting

The extruded tube is molded to form a film of a certain width and thickness. Then, it is cut into bags of a certain length by a cutting machine. This step requires strict control of the size of the bag to ensure its convenience and applicability during use.

5. Edge sealing and printing

The cut bag needs to be edged to prevent it from leaking due to the opening during use. The edge is usually heat sealed or glued. After that, the bag is printed, including the logo, brand, address and other information for easy identification and use.

6. Quality inspection and packaging

After each step of production is completed, it is necessary to carry out strict quality inspection. This includes dimensional testing, strength testing, appearance testing, etc., to ensure that products meet quality standards. Products that pass the test will be packaged into a certain number of bundles, then packaged and labeled for easy storage and transportation.

7. Warehousing and sales

The packaged LDPE express bags will be stored in the warehouse for sale or shipment. In the sales process, the product also needs to be checked again to ensure that its quality meets the requirements. In addition, according to customer needs, products can also be customized to meet the needs of different customers.

8. Conclusion

Through the above steps, we have successfully completed the production of LDPE express bags. This production process not only ensures product quality and performance, but also improves production efficiency and reduces costs. With the progress of science and technology and the change of market demand, we will continue to optimize the production process to meet the needs of customers.