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

Posted by ai on March 13th, 2020

As we all know, there are many types of plastic packaging bags, of which the most common are PE and PVC. PE plastic packaging bag is mainly made of polyethylene, which has excellent low temperature resistance, good chemical stability, and resistance to most acids and alkalis (not oxidizing acids). PVC plastic packaging bagis mainly made of polyvinyl chloride resin, which is a kind of plastic bag processed with PVC film. It has the characteristics of light weight, heat insulation, heat preservation, moisture resistance and flame retardant. So how do we tell if the plastic packaging bag is PE or PVC?

Identify whether the plastic packaging bag is PE or PVC:

1, touch method

Touch the surface of the plastic packaging bag. Generally, the PVC plastic bag is sticky and astringent, while the PE plastic bag is milky white, translucent, feels smooth and has a tough texture.

2, dithering method

You can shake the plastic packaging bag vigorously with your hands. If it can make a crisp sound, it is usually a PE plastic bag. The sound is small and stuffy, usually a PVC plastic bag.

3, burning method

If conditions permit, you can also use combustion to identify PE and PVC materials. Generally speaking, the flame is blue, and the upper end is yellow. When burning, it is a PE plastic packaging bag; it is difficult to burn, the flame is yellow, and the upper end is green, and the hydrochloric acid stimulating odor is a PVC plastic packaging bag.

4. Water immersion method

After immersing the plastic packaging bag in the water and pressing it into the water with your hands, the plastic packaging bag that can surface is the plastic packaging bag that sinks to the bottom Water; about 0.92g / cm3 and 1.4g / cm3 respectively at room temperature).

About how to distinguish whether the plastic packaging bag is PE or PVC, today I will introduce it to you here. I believe that through these four methods, you can help everyone quickly identify the material of plastic packaging bags.

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