What are the categories of express delivery bags

The classification of express delivery bags by material includes express delivery plastic bags, express delivery document seals, express delivery bubble bags, express delivery bone bags, express delivery woven bags, etc.
1. Material of express delivery bags: Low density polyethylene (LDPE), commonly referred to as PE, and high-density polyethylene (HDPE), commonly referred to as PO. Express delivery bags have advantages such as low cost and light weight.
The difference between PE and PO in express delivery plastic bags: PE has good transparency and softness, and the printing color is relatively bright; PO has relatively good mechanical properties; In China, PE is commonly used as the main material for express delivery bags, while in foreign countries, PE and PO composites are commonly used as the main material for express delivery bags.
There are two main categories of polyethylene express delivery bags in the market: one is brand new material express delivery bags, and the other is recycled material express delivery bags
2. Material of courier document seals: Generally, gray background white board paper, white cardboard, kraft cardboard, and more are used. The express delivery industry generally uses paper weighing from 200 grams per square meter to 450 grams per square meter, The courier document seal has the advantages of being flat and not easily broken compared to the courier plastic bag.
3. Material of express delivery bubble bag: A transparent soft packaging bag filled with air in the middle layer of the air cushion film. It is mainly used for packaging small, fragile, easily damaged, and less precise goods in the express delivery industry. The express delivery bubble bag is equipped with a shock absorbing bubble film, which contains countless small bubbles, making it lightweight and elastic. It has good shock absorption, impact resistance, non-toxic, odorless, moisture-proof, and corrosion-resistant advantages.
4. Material of express bone bag: Bone bag (also known as dense bag, consisting of any bag, sealed bag, chain clip bag, self sealing bag, English: Ziplock bags, Reclosable Bag, Zipper Closure Bag, Resealable Bag), made of polyethylene (LDPE) and high-pressure linear polyethylene (LLDPE) through blow molding and hot cutting mechanism, is a plastic bag that can be repeatedly sealed. Bone bags can be used for internal and external packaging of various small items. The self sealing bags produced with food grade raw materials can store various small foods, tea, seafood, etc., which are moisture-proof, waterproof, insect proof, and prevent things from scattering.
5. Express woven bag: also known as snake skin bag. It is a type of plastic used for packaging, and its raw materials are generally various chemical plastic materials such as polyethylene and polypropylene. The color of woven bags is generally white or gray white, non-toxic and odorless, and generally less harmful to human health. Although they are made from various chemical plastics, they have strong environmental protection and recycling efforts; Mainly used for packaging and packaging of various items, with a wide range of industrial applications.
The classification of express delivery bags is based on raw materials: there are brand new express delivery bags, semi new express delivery bags, and recycled express delivery bags.
The classification of express delivery bags is based on whether they are printed: printed express delivery bags, unprinted express delivery bags.
The classification of delivery bags is based on whether to fold the bottom organ: with folded bottom organ, without folded bottom organ.
Whether to add additional bags for express delivery bags: with or without additional bags.