Understand the various properties of plastic packaging film
Mar 19, 2019
Understand the various properties of plastic packaging film
As a packaging material, the protective function of the plastic packaging film is the most important and basic function. The protective function of the plastic packaging film on the product is multi-faceted. Different products and different packaging forms have different emphasis on the protection function of the plastic packaging film.
Preventing the leakage of goods in the package or the damage and pollution of the foreign matter entering the package, directly reflecting the mechanical protection function of the plastic packaging film, mainly the mechanical strength of the film, such as tensile strength, tear strength, drop impact strength and resistance Puncture strength and so on.
The welding strength is also a necessary condition for the plastic packaging film to reliably protect the product; the effect of the plastic packaging film on the product display is closely related to the transmittance, haze, gloss, antistatic property and printing property of the film itself. It is important to cause sufficient light transmittance and haze.
The light transmittance and haze of the plastic packaging film are important indicators for determining the visibility and clarity of the packaged goods, and the relationship between the display effects of the products is particularly large. Good smoothness is conducive to the smooth movement of the plastic packaging film on the packaging production line during packaging, avoiding the damage caused by excessive resistance during its movement. The smoothness of the film can be described by the magnitude of its coefficient of friction. The smaller the coefficient of friction, the better the smoothness performance.
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