The material of vacuum bag and characteristics

Vacuum bag is a general of flexible packaging composite film products. If according to the use of temperature is different, there will be a lot of division: need to less than 100 sterilization, sterilization need some 100 degrees, 121 degrees and 135 degrees. , of course, also have the normal temperature, the room temperature may choose under the condition of sterilization is irradiation. And will consider the characteristics and the weight of the package content such as to determine the rational use of vacuum bag material, no immutable, suitable is the best. General vacuum bag material has the following: PA/PE, PA/CPP, PET/PE or PET/CPP has three layers, four layers, in order to increase the material quality performance, PET/PA/PEPET/AL/CPPPA/AL/CPPPET/PA0 / AL/CPP basic characteristics are: the PE is suitable for the use of low temperature, CPP is suitable for high temperature cooking, PA is to increase physical strength, durability performance, AL foil is to increase the blocking performance, shading, PET, increase the mechanical strength and crisp. Then according to the demand, combination, all kinds of performance, there are transparent, in order to increase the blocking performance using PVA water resistant high barrier coating. Vacuum bag PE and PP vacuum bag is an important part of vacuum bag products, the difference between the two mainly includes the following aspects: first, the chemical structure of vacuum bag PE and PP vacuum bag. PE, or polyethylene, is a kind of simple structure of the polymer, by repeated CH2- Can be connected with the unit, polyethylene is through the addition polymerization of ethylene. PP polypropylene, is a semicrystalline thermoplastic plastics. Second, the characteristics of vacuum bag PE and PP vacuum bag. Polyethylene non-toxic, odourless, feel like wax, good low temperature resistance, PE the lowest temperature can reach - vacuum bag 70 - - 100℃。 Polyethylene chemistry stability is good, can endure most of the acid and alkali erosion, room temperature does not dissolve in solvents, small water imbibition, good electrical insulating properties, but poor polyethylene heat aging. Polypropylene has a high resistance to impact, mechanical properties of strong, resistant to many kinds of organic solvent and acid and alkali corrosion in the above all kinds of material structure, the best material should be with PA, is a nylon and plastic composite made of composite membrane. The vacuum bag of the material is soft, encounter low temperature doesn't change character, more durable, and soft, high tensile strength. Usually used for vegetables, cereals and snacks is very good, fresh and clean thick.