High-Pressure PE Courier Bags: Heavy-Duty & Waterproof Shipping Solutions

In terms of raw materials and manufacturing processes:

It mainly uses low-density polyethylene as the basic raw material. This raw material is generally the product obtained by the polymerization reaction of ethylene monomers under specific conditions of high temperature (160 - 300 °C) and high pressure (100 - 300 MPa). The manufacturing process often employs the blow molding technique. First, the molten low-density polyethylene material is extruded into a tubular shape through an extruder. Then, compressed air is introduced into the tube blank to inflate it. After that, through a series of processes such as cooling and drawing, the shape of the courier bag is finally formed.

In terms of performance characteristics:

Good flexibility: It is soft and elastic in texture, comfortable to the touch, and has excellent flexibility. It can be easily bent and twisted without being easily damaged. This characteristic enables it to conform well to the shapes of various items when packaging them. Whether it is regular-shaped documents, books or irregular-shaped small ornaments, handicrafts, etc., they can all be tightly wrapped, effectively avoiding damage to the items caused by friction or collision with the bags during transportation.

Relatively high transparency: It has relatively good transparency, which is convenient for courier workers to check the general situation of the items in the bags. Meanwhile, for some products that need to display brand, appearance and other information (such as small gifts with exquisite packaging), it can also play a certain display role, allowing the recipients to have a preliminary understanding of the items before opening the bags.

Good moisture resistance: It has good moisture resistance. During the transportation process, even when encountering wet weather or being stored and transferred in an environment with high humidity, it can effectively block the entry of external water vapor into the bags and protect the items from getting damp. For some items that are sensitive to humidity, such as paper documents and electronic product accessories, using high-pressure courier bags for packaging can provide effective moisture protection.

Good tensile properties: It has good tensile properties and elongation rates and is not prone to rupture when subjected to a certain external force. For example, when there are many courier parcels, they are stacked and squeezed or subjected to a certain pulling force during the handling process, high-pressure courier bags can withstand these external forces, maintain the integrity of the packaging and ensure the safety of the items. However, its tensile strength is slightly lower compared with that of some other types of polyethylene bags (such as high-density polyethylene bags), so for some items that are relatively heavy or have sharp corners and may exert greater pressure or puncture force on the bags, it may not be suitable to use them alone.

In terms of application scenarios:
It is widely used in the packaging of various courier items, and is especially suitable for packaging items that are relatively light in weight and have high requirements for flexibility, such as clothing, daily necessities, small electronic products, books and documents, etc. In the current booming e-commerce industry, numerous merchants choose high-pressure courier bags to package their products and then send them all over the country. With its many advantages, it occupies an important position in the field of courier packaging.

All in all, high-pressure courier bags, with their unique performance characteristics, meet the various needs of the courier industry for packaging bags in terms of protecting items, facilitating operations and cost control.