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• Time of issue:2021-07-13
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(Summary description)According to materials: PE is divided into LDPE, LLDPE and HDPE.
　　 according to the production process is divided into: PE flat bag, ziplock bag, zipper bag, envelope bag, punching handbag, handle handbag, zipper bag, PE film.
　　1. PE flat bag is the simplest manufacturing process. After the film is blown by the machine, the bag is cut into a bag on the bag making machine, and the bottom is sealed.
　　2. The ziplock bag is equipped with a bone strip when the film is blown by the machine, which can be sealed manually. Unlike zipper bags, these two types of bags are generally easy to confuse.
　　3. The zipper bag is a bag made of PE film with 2 clip chains (this clip chain is separately produced). The two sides of the bag generally have relatively wide indentations, while the ziplock bag does not. Ziplock bags have few printing colors, while zipper bags can print complex patterns.
　　4. The envelope bag has a tongue like an envelope. A strip of glue is attached to the tongue, which can be folded to seal the bag. General clothing is used more. There is also a courier bag which is actually a kind of envelope bag.
　　5. The punching tote bag is to punch a hole at the top of the flat pocket to facilitate the lifting of the bag.
　　6. ​​The handle bag is to add a plastic film strip on the top of the bag to facilitate the lifting of the bag. This process consumes labor and is relatively expensive.
　　7. The zipper bag is to install a zipper strip and a zipper cap on the sealing part of the bag.
　　 8. PE film is the film that is not made into a bag after being blown out by the machine. It is also divided into stretch film and shrink film.
Commonly used in the market are counted by one and counted by length (roll). (A) The small bag is mainly used for the packaging of small accessories, electronic products
Most of the accessory bags of the products have anti-static effect, and the mouth of the bag is divided into flat mouth and self-sealing structure. The latter is also called bone bag (PE bone bag) or compact bag;
(Roll) bags need to be cut by themselves (for material packaging) and printed cuts (for supermarkets).
In addition, the cling film made of PE material can also be called a PE bag. Note that the cling film directly in contact with food must be made of PE material (the other is generally PVC), which is safer for the human body. Resolution method: The transparency, stretchability and viscosity of PVC cling film are stronger than PE cling film. When the PVC cling film is burned with fire, the flame will turn black, emit black smoke, have a pungent smell, will not drip oil, and will automatically go out after leaving the fire source. When the PE cling film burns, the flame is yellow, odorless, dripping oil, and can continue to burn after leaving the fire source.