What Material is the Express Bag Made Of? What Types of Express Bags Do You Have?
We often receive express delivery, but do you know what materials are used for express delivery bags? And do you know the types of express delivery bags?
Ⅰ. The material of the courier bag
Express plastic bags are used for the transportation of logistics express and e-commerce products. The main function is to cover and protect the transported products. Therefore, the express bags must have high shading and abrasion resistance, and also have a certain degree of tension and toughness. The film blowing process of express bags usually uses a three-layer co-extrusion film blowing machine to blow the film. The inner and middle layers are generally made of fixed LDPE material. The outer layer can be customized according to customer preferences. The main material for the smooth surface of the express bag is LDPE, and the matte material is HDPE.
LDPE has high surface gloss and good tensile force.
The surface of HDPE is matt, with better toughness and more high-end appearance.
The blown film effect of these two materials is very good and can have good printing performance. It is a very good choice for brand e-commerce to pursue exquisite printing.
Ⅱ. Classification of courier bags
Courier bags are classified into express plastic bags, express document seals, express bubble bags, express bone bags, express woven bags, etc.
1. Express plastic bag material: low-density polyethylene (LDPE) usually referred to as PE, high-density polyethylene (HDPE) usually referred to as PO, plastic courier packing bags have the advantages of low cost and light weight.
The difference between PE and PO in express plastic bags: PE has better transparency and softness, and the printing color is brighter; PO has relatively good mechanical properties; PE is used as the main material in Chinese express bags, but it is generally used in foreign countries. PE and PO are combined as the main materials of express bags.
2. Courier document cover material: generally gray-bottomed whiteboard paper, white cardboard, cow cardboard, mostly. The express industry generally uses paper with a weight of 200 g/m2 to 450 g/m2. Compared with express plastic bags, express document seals have the advantages of being flat and not easily broken.
3. Express ziplock bag material: ziplock bag (also known as compact bag, sealed bag, zipper bag, made of polyethylene (LDPE) and high-pressure linear polyethylene (LLDPE) through blown film molding, hot-cut machine-made bags. This kind of plastic bag can be sealed repeatedly). Ziplock bag can be used for inner and outer packaging of various small items. The ziplock bag produced with food-grade raw materials can store all kinds of small food, tea, seafood, etc., which is moisture-proof, waterproof, insect-proof, and can prevent things from being scattered.
4. Express woven bags: also known as snakeskin-pattern bags. Its raw materials are generally various chemical plastic raw materials such as polyethylene and polypropylene. The color of the woven bag is generally white or off-white, non-toxic and tasteless, and generally less harmful to the human body. Although it is made of various chemical plastics, its environmental protection is strong, and the recycling effort is large; it is mainly used for various packaging of articles, and is widely used in industry.
