What are the types of materials for plastic packaging bags?

Plastic is an indispensable material in modern society, ranging from artificial satellites and airplanes to mobile phones and ballpoint pens. Plastics can be seen everywhere, and these plastics are petrochemical products. Plastic film is one of the varieties, and plastic bags are made of plastic film. There are roughly five types of plastics made into plastic bags:

⑴ Polyvinyl chloride (PVC)

In the 1950s and 1960s, most plastic bags were made of polyvinyl chloride, because they contained additives to improve processing performance and plasticizers to improve the flexibility of the film. These additives were toxic and not suitable for containing food, so Except for the special non-toxic hard film used for packaging, others have rarely been seen in the market.

⑵ Low pressure polyethylene (HDPE)

HDPE film is generally used in places that require high tensile and anti-seepage. HDPE film is also commonly used in merchandise bags, grocery bags and food packaging. In daily life, commodity bags that require high strength, good water resistance, and good impermeability are all made of this product.

⑶ High pressure polyethylene (LDPE)

Films made of LDPE have good optical properties, strength, flexibility, sealing, slow odor diffusion and chemical stability. Because of its excellent performance and processability, and its non-toxicity, the price is relatively low. Most of the plastic bags currently used are such products.

(4) Polypropylene (BOPP)

BOPP film is the abbreviation of biaxially oriented polypropylene film. It is a very important flexible packaging material. It is colorless, odorless, tasteless, non-toxic, and has high tensile strength, impact strength, rigidity, toughness and good transparency. sex. After corona treatment, BOPP film has good printing adaptability, and can be printed in color to obtain exquisite appearance effect, so it is often used as the surface layer material of composite film. Now colorful food and cold drink packaging films are made of BOPP.

⑸ Other plastic films

Polyester, polystyrene and composite films, etc.

Honest Packaging specializes in the production of various flexible packaging, including stand-up pouches, zipper bags, vacuum bags, food bags, aluminized bags, aluminum foil bags, coffee bags, pet food bags and many other products.