2023

How to distinguish whether the plastic packaging bag is PE or PVC material?

We all know that there are many kinds of plastic bags, but the most common only PE and PVC two kinds of material. PE plastic packaging bags are mainly made of polyethylene (Polyethylene), which has excellent low temperature resistance, good stability, and can withstand the erosion of most acids and bases. PVC plastic packaging bags are mainly made of polyvinyl chloride resin as the main raw material, and are made of PVC film. It has the characteristics of light weight, heat insulation, heat preservation, moisture-proof, flame retardant, etc. So how do we identify the plastic packaging bag is PE or PVC. Identification method:
1. Touch method
Touch the surface of the plastic packaging bag, the general PVC plastic bag is sticky and astringent, while the PE plastic bag is milky white, translucent body, feel lubrication.
2. Jitter method
Can be used to shake the bag, if it can make a crisp sound, usually PE plastic bags; small and stuffy sound, PVC plastic bags.
3. Combustion method
If the conditions permit, the method of combustion can also be used to identify the two materials of PE and PVC. Generally speaking, the flame is blue, the upper end is yellow, and the PE plastic packaging bag emits paraffin odor when burning; it is difficult to burn, the flame is yellow, the upper end is green, and the PVC plastic packaging bag emits irritating hydrochloric acid odor.
4. Water immersion method
First, the plastic packaging bag is immersed in water, and after being pressed into water by hand, PE plastic can surface and PVC plastic can sink to the bottom (the density of PE plastic packaging bag is less than water, and the density of PVC plastic packaging bag is greater than water; At normal temperature, it is about 0.92g/cm3 and 1.4g/cm3 respectively).
On how to identify the plastic packaging bag is PE or PVC material of this problem, today's chart packaging? Xiaobian introduced here. I believe that through these four methods, we can help you quickly identify the material of the packaging bag.

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