PE Mailing Bags : The Production Process and Technological Innovation

Polyethylene shipping bags, also known as PE Mailing Bags, are an indispensable component in the modern shipping and postal sector. These bags are mainly made from polyethylene, an eco-friendly plastic, with high recyclability, making them not only useful but also sustainable. In today’s world, when e-commerce is booming and the need for safe transportation of goods is increasing, the role of PE bags becomes extremely important.

PE Mailing bags not only ensure that goods are preserved in the best conditions during transportation but also contribute to environmental protection thanks to their ability to be reused and recycled. Flexibility in design and manufacturing allows these bags to be customized to fit the unique needs of consumers and businesses, from size and thickness to safety features such as waterproofing. , tear resistant and anti-static.

In addition, using PE bags is also considered an economic choice as they have low production costs but are highly effective. This not only helps businesses save costs but also contributes to reducing total logistics costs for the postal and freight industry. In this article, we will explore the production process of PE Mailing Bags, from raw material selection to the final stages of production, to better understand how these bags are made and achieve reliable quality.

Production materials

In the process of producing PE shipping bags, selecting and preparing raw materials is an extremely important step. Below are the detailed steps regarding the materials used:

1. Choose the type of Polyethylene (PE):

• High-density polyethylene (HDPE): HDPE is widely used in the production of bags that require high durability, abrasion resistance and resistance to environmental impacts such as temperature and chemicals.
• Low density polyethylene (LDPE): LDPE has high flexibility and elasticity, often used to produce bags that need softness and flexibility, easily protecting products from impact during transportation.

2. Using recycled materials:

• Preparing recycled materials: Recycled PE materials are collected and processed through washing, classification to remove impurities, and crushed into plastic granules.
• Recycling purpose: Using recycled materials not only reduces production costs but also contributes to environmental protection, reducing the amount of plastic waste released into the environment.

3. Mix and prepare the ingredient mixture:

• Raw material blending: PE raw materials, both new and recycled, are mixed in appropriate proportions to ensure the quality of the final product.
• Add additives: Additives such as antioxidants, softeners, and UV stabilizers can be added to improve bag properties such as durability, elasticity, and UV resistance. .

4. Check raw material quality:

• Pre-production testing: Every batch of raw materials is thoroughly tested for purity, moisture, and other physical properties before being released into production to ensure that the final product meets the specifications. quality requirements.

PE Mailing bag production process

After the materials have been prepared and quality checked, the PE bag production process continues with the following main steps:

Step 1: Blowing PE film

• Melting plastic: PE plastic is fed into a film blowing machine, where it is melted at high temperature.
• Film blowing: The molten plastic is then blown through a cylindrical nozzle to form a thin film. This blowing process produces a continuous film with a uniform thickness.
• Cooling and rolling the film: After being blown, the plastic film will be cooled quickly with cold air and then rolled into a large roll.

Step 2: Cut and weld the membrane

• Film cutting: Roll film is cut to the required size depending on the size of the PE bag requested by the customer.
• Membrane welding: The edges of the membrane are welded together to form the shape of the bag. This welding progress uses high temperatures to tightly join the membrane layers together, ensuring the bag has the necessary tightness and durability.

Step 3: Printing on the bag

• Printer design and programming: Print samples are designed according to customer requirements and then programmed into the printer.
• Printing: Use suitable printing techniques such as screen printing, flexo printing or digital printing to print designs, information, or logos on the bag surface. The selected printing ink must ensure good adhesion on the PE plastic surface and must withstand harsh transportation conditions.

Step 4: Check quality

• Inspect each bag: Each bag is strictly inspected to ensure that there are no defects such as tears, holes, or printing errors.
• Durability testing: Durability tests are also performed to ensure the bag can withstand weight and pressure during use.

Step 5: Packaging and distribution

• Packaging: PE bags will be carefully packaged after completing the quality checks.
• Distribution: Final products will be shipped to warehouses or directly to customers based on orders.

Technology and innovation in the production of PE Mailing Bags

The continuous development of technology has made an important contribution to progress in the PE bag manufacturing industry. These innovations not only improve quality and production efficiency but also contribute to environmental protection. Below are some typical innovative technologies and methods in the production of PE Mailing Bags:

1. Advanced recycling technology:

• Improvements in the processing of recycled materials: Using new technologies helps increase the rate of use of recycled materials in production. As a result, the amount of plastic waste is reduced and the impact on the environment is reduced.
• Chemical recycling method: This is a new recycling method that allows separating plastics to recycle them into materials of almost original quality, thereby creating high-quality PE bags from the same material. used raw materials.

2. Digital printing technology:

• Flexible and fast printing: Digital printing technology allows PE bag manufacturers to customize orders quickly, even in small quantities, without the need for complicated setup.
• High printing quality: Modern printing technology helps create clear and sharp images and writing, suitable for brand promotion on PE bags.

3. Improvements in PE film production:

• Developing film blowing technology: Modern film blowing machines are increasingly improved to produce PE films with more uniform thickness and more efficiently, minimizing scrap and optimizing the production process.
• Nanotechnology applications: Scientists and engineers are developing the use of nanoparticles to improve the properties of PE films, including heat resistance, waterproofing and physical durability.