Performance comparison of PA/PET vacuum packaging bags.stand up Spout pouch manufacturer

　　PET vacuum packaging bag is colorless, transparent, and glossy. Commonly used as an outer layer material for cooking packaging, it has good printability. PA material vacuum packaging bags have good transparency and are suitable for oily food, meat products, fried food, vacuum packaged food, steamed food, etc.

　　PET vacuum packaging bag material, PET, also known as polyethylene terephthalate, is a colorless transparent substance with a certain gloss (non qualitative) or an opaque milky white substance (crystalline). It is difficult to ignite and burn, but once burned, although the flame is detached, it can still continue to burn. When burned, it will melt and burst into fragments, with a yellow flame and early blue edges. There are small droplets falling, black smoke, and a slightly sweet and pungent odor from the mountain belt. The performance of pure PET is very poor, especially in terms of impact strength and heat resistance. However, after being reinforced with glass fiber, various properties are greatly improved.

　　PE vacuum packaging bag material, also known as polyethylene, is non-toxic, odorless, and milky white. Crystalline plastic with a density of 0.91~0.96g/cm3. Polyethylene has a certain mechanical strength, but compared to other plastics, its mechanical strength is low and its surface hardness is poor. Excellent insulation performance, polyethylene is insoluble in any known solvent at room temperature, and resistant to dilute sulfuric acid, dilute nitric acid, any concentration of other acids, as well as various concentrations of alkali and salt solutions. Polyethylene has a high degree of water resistance, and its performance can remain unchanged after long-term contact with water. Polyethylene has poor water vapor permeability, while it has good permeability to oxygen, carbon dioxide, and many organic vapors. Polyethylene can age and become brittle under the action of heat, light, and oxygen. The usage temperature of high-pressure polyethylene is generally around 800 ℃, while that of low-pressure polyethylene is around 1000 ℃. Polyethylene is cold resistant and still has good mechanical properties at -600 ℃, while it still has a certain degree of softness at -700 ℃.

　　From this, it can be seen that PET vacuum packaging bags have excellent mechanical properties, high rigidity, hardness, and toughness, as well as resistance to puncture, friction, high and low temperatures, chemical resistance, oil resistance, airtightness, and fragrance retention. PA vacuum packaging bags have good luster, high tensile strength, and tensile strength, as well as good heat resistance, cold resistance, oil resistance, and organic solvent resistance. They also have excellent wear resistance and puncture resistance, It is soft and has excellent oxygen resistance. Compared with PET, PA material is slightly higher in strength and puncture resistance, but the market price of PA vacuum bag is slightly higher than that of PET vacuum bag.

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