In our daily life, we often come into contact with a variety of packaging bags, but it is difficult to say what material a bag is made of and what material it is made of. For example, straight empty bag, everyone has contact with the hall, but to describe what material it is made of, and what material it is made of straight empty bag is more suitable, many people have a half-understanding. So let's have a brief understanding of the material of the packaging bag.

I. Aluminum foil /AL

Aluminum foil is made of high purity aluminum formed after many rolling in the form of a very thin sheet, is a good Yin insulation materials, not only is not easy to corrode, moisture-proof and waterproof, also has good heat resistance and low temperature resistance, often used in high-temperature cooking and food preservation, but it also has disadvantages, it is a brittle material, easy to fracture, the second is the difference in acid, 3 it is without heat sealing, Therefore, it can only be used as the middle layer material of the bag.

Two, PET/ poly (p-phthalic acid 7 diol) lipid

Generally using extrusion method into the piece, and then made by two-way stretching straight Air China, this material is very widely used, because the dener induced brightness is very good, shiny, strength and toughness is also better than polystyrene and polystyrene, not broken, coupled with its non-toxic tasteless, good health and safety, generally can be directly used for dry food packaging. Its disadvantages are also obvious, not heat - resistant water immersion, not alkali.

Three, PA/ nylon/polyamide

The material is also very good, but also has good resistance, oil resistance, resistance to thorns, more holy soft, but moisture absorption, sealing bitmei, so PA packaging bag is generally used to package solid food, such as meat products, greasy food, steamed food and so on.

Four, OPP/ oriented polypropylene

This kind of material is the most brittle and transparent of all materials, and there is no tension. Most of the transparent packaging bags on the market are made of opp materials, so they are widely used, generally used in clothing, food, printing, stationery, cosmetics, paper and other industries.

Five, HDPE/ high density polyethylene/low pressure polyethylene/low pressure film

This kind of material is darker than Han, more accurate, low rate of extension, strange touch when jiyin is crisp, but in our daily life with the wind, such as shopping in the supermarket, is made of HDPE. In addition, it can be bagged separately, creating a relatively common and inexpensive bag on the market, the PO bag.

Six, LDPE/ low density clothing 7 ene/high pressure radiation 7 ene/high pressure membrane

Baoming texture, soft, good toughness, good transparency, feel is relatively smooth, the thicker the material, the harder the expansion rate is greater, this material can also be a separate bag, like PO is a relatively common and cheap material.

Seven, CPP/ fluid-characteristic propylene/unstretched polypropylene

This kind of material has high brightness, higher accuracy than egg film, and is relatively clear. It can be used as the base film of composite materials for a long time, and is often made into composite Chenghua together with erta Dong film. It can be used as the base film of composite materials for the first time.

The seven materials introduced above are some materials commonly used in packaging bags. If you choose the appropriate material to pylon your packaging after knowing the simplest properties, you are welcome to call to pylon and will be provided with a professional packaging option.