OPP bag is a kind of stretchable polypropylene plastic, which is actually a kind of plastic bag. Its characteristic is easy to burn. Flame condition: melt dripping, blue under yellow, less smoke from the fire, continue to burn.
Oriented polypropylene (OPP): Oriented polypropylene (film), a type of polypropylene and bidirectional polypropylene (BOPP)
O (orientation): mainly refers to the production process.
Polypropylene (PP), polypropylene, but as general structural parts, corrosion resistant chemical equipment spare parts, electrical heating insulation
With high transparency and fragility, the tongue stickers in the mouth after folding side seals of OPP single sheet can be used to tear and protect the skin surface. The cement seals after folding tongue are easy to use, beautiful and generous. They are widely used in clothing, food, printing, stationery, cosmetics, paper making and other industries. It can also print various patterns and punch butterfly holes and aircraft holes according to customers’needs.
OPP bags have obvious advantages:
1. How nervous. The experimental data show that the sealing property of the new OPP bag is more than twice that of the traditional bag, which makes the product more moisturizing, fresh-keeping and fresh-keeping for longer time.
2. strong security. The synthetic technology and special printing technology adopted have high scientific and technological content. At present, only Germany and Japan have mastered this technology, and it is almost impossible to manufacture counterfeits, which provides a strong guarantee for the anti-counterfeiting of commodities.
3.The new OPP bags are made of degradable materials and fully meet the relevant international standards in environmental protection.
PE is the abbreviation of polyethylene, which is a thermoplastic resin formed by the polymerization of ethylene. In industry, it also includes ethylene copolymers and small amounts of olefins.
Polyethylene is odorless, non-toxic, wax-like, has excellent low temperature resistance (minimum operating temperature can reach – 70 ~100 C), good chemical stability, can withstand the most acid and alkali erosion (not anti-oxidant acid), insoluble in general solvents at room temperature, low water absorption, excellent electrical insulation performance; but polyethylene has environmental stress (chemical and mechanical effects). It is very sensitive and has poor anti-aging ability. The properties of polyethylene vary according to its variety, mainly depending on its molecular structure and density. The products with different densities (0.91-0.96g/cm3) can be obtained by different production methods. Polyethylene can be processed by ordinary thermoplastic forming methods (see plastic processing).
In addition, PE fresh-keeping film can also be called PE bag. Pay attention to the fact that PE material (except PVC) must be used for fresh-keeping film in direct contact with food, which is relatively safe for human body.
Resolution: PVC film is superior to PE film in transparency, tensile property and viscosity. PVC plastic film in the fire, the flame blackened, smoking, has a pungent smell, will not drip oil, leaving the fire will automatically extinguish