Plastic film has a certain shielding ability against liquids, small molecule gases, and odor molecules. The permeability coefficient is usually used to represent the size of the barrier properties of plastic films.
At present, the commonly used high barrier packaging materials include PA, EVOH, and PA.
PA high barrier film has good permeability, with higher permeability under high temperature conditions than PVDC film, and lower permeability at room temperature than PVDC film. Jinweier’s PA sheet equipment can produce PA sheets with three, five, and seven layer structures. The raw materials used typically include PA, PP, PS, PE, PVC, and HIPS. Usually used for general food packaging.
The PA high barrier sheet production line equipped by GWELL adopts multi-machine co-extrusion technology, which can produce multi-layer composite PA high barrier sheet, such as ABA, ABCBA, ABCD, etc. Widely used in thermal forming, food packaging and other fields.
The blocking effect of EVOH high barrier sheet is more than ten times higher than that of PVDC high barrier sheet. The EVOH sheet production equipment equipped by GWELL can produce EVOH three-layer sheet, PVDC five-layer sheet or PVDC seven-layer sheet. The raw materials used are generally EVOH, PS, PP, PVC, PE and HIPS. It is usually used for the packaging of dairy products, meat and canned food, and the packaging of chemicals, electronic components and medicines.
Post time: Feb-28-2024