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Analysis of PE film properties
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With the improvement of people's living standard in our country state coercion residents iodized table salt, put forward corresponding requirements of salt making and packaging. Because of the salt of the packaging bags of food packaging, health requirements are higher, generally choose non-toxic or low toxicity of PE, PET, PP and PVC (only for outer layer of composite film) membrane.
Polyethylene film
Polyethylene film (polyethylene film (PE, obtained by polymerization of ethylene thermal plastic polymer, and has excellent mechanical strength, dielectric properties and moisture resistance, at low temperature can keep the softness and chemical stability. Polyethylene film colorless, tasteless, non - odor, non-toxic, was translucent. It does not react with moisture, grease, compounds and other reactions, at room temperature is not soluble in most of the solvent, the thermal stability is poor, but can withstand the low temperature of -70 degrees C. The fusion performance is good, and the oxygen and the two gasification carbon have very good permeability, and the transmission property of the water vapor is poor.




Polyethylene film can be generally divided into low density polyethylene (LDPE), medium density polyethylene (MDPE), high density polyethylene (HDPE) film.
Untreated polyethylene film is a kind of material which is difficult to be printed. This is because of the non polarity of polyethylene, stable chemical properties, insoluble in most of the solvent, the ink on the adsorption ability is very weak, after the drying is not strong. Therefore, it is necessary to make the appropriate treatment of polyethylene film in the process of printing before or during the printing process.
Suitable for printing processing method of polyethylene film, usually used in electric field in the PE film surface ionization or strong oxidizing agent (such as chlorine, ozone, potassium dichromate) after short time of gas flame.
Characteristic analysis
The permeability of PE film is larger, and its permeability is decreased with the increase of density. PE film has small moisture resistance, moisture permeability. Polyethylene film (PE) according to the manufacturing method and control method of different, can produce low density, medium density, high density polyethylene and crosslinked polyethylene and other products of different performance.

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