Courier Bags are classified by material into courier plastic bags, courier document seals, courier bubble bags, courier bone bags, courier woven bags, etc.

Material of courier plastic bags: 

Low-density polyethylene (LDPE) is usually called PE, high-density polyethylene (HDPE) is usually called PO. Courier plastic bags have the advantages of low cost and light weight.

The difference between PE and PO in courier plastic bags: PE has better transparency and softness, and the printing color is brighter; PO has better mechanical properties; domestic courier bags also use PE as the main material, while foreign countries generally use PE and PO composite as the main material of courier bags.

There are two major categories of polyethylene courier bags on the market: one is new material courier bags, and the other is recycled material courier bags.

Material of courier document seals: 

generally gray-bottomed white board paper, white cardboard, cow cardboard, etc. The express industry generally uses paper with a weight of 200 grams/square meter to 450 grams/square meter. Courier document seals have the advantages of being flat and not easy to break compared to courier plastic bags.

Material of express bubble bag: 

A transparent soft packaging bag with air filled in the middle layer of air cushion film. Mainly used for packaging small, fragile, easily damaged, and less precise goods in the express industry. The express bubble bag is equipped with shock-absorbing bubble film. There are countless small bubbles in the bubble film, so it is light and elastic. It has good shock absorption and impact resistance, and is non-toxic, odorless, moisture-proof, and corrosion-resistant.

Material of express bone bag: 

Bone bag (also known as dense bag, made of any bag, sealed bag, ziplock bag, ziplock bag, etc., is a kind of plastic bag that can be repeatedly sealed by blowing film and hot cutting machine bag with polyethylene (LDPE) and high-pressure linear polyethylene (LLDPE). Bone bags can be used for internal and external packaging of various small items. Ziplock bags produced with food-grade raw materials can store various small foods, tea, seafood, etc., and are moisture-proof, waterproof, insect-proof, and prevent things from scattering.

Express woven bag:

 also known as snake skin bag. It is a kind of plastic used for packaging. 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 grayish white, non-toxic and odorless, and generally less harmful to the human body. Although it is made of various chemical plastics, it is more environmentally friendly and has a greater recycling capacity; it is mainly used for the packaging and packaging of various items, and is widely used in industry.