jmeipacking

Distinguishing plastic bags isPEstillpvcmaterial method

January 24, 2023

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As we all know, there are many kinds of plastic packaging bags, among whichPEandpvcis a common material.PEPlastic packaging bags are mainly made ofPEmade with excellent low temperature resistance, good chemical stability and resistance to most acids and bases(Not resistant to acids with oxidizing properties).pvcPlastic packaging bags are mainly made ofpvcresin as the main raw material is made ofpvcPlastic bags made of film. It has the characteristics of light weight, heat insulation, heat preservation, moisture resistance, flame retardant and so on. So, how do we identify the plastic bags are made ofPEstillpvcMade of it?How to distinguish plastic packaging bags fromPEorpvcMaterial :1.touch methodIn contact with the surface of the plastic packaging bag, in general,pvcPlastic bags are sticky and astringent, whilePEThe plastic packaging bag is milky white and translucent, with a smooth feel and tough texture.2.Jitter methodYou can shake the plastic bag by hand. If you can make a crisp sound, usuallyPEplastic bag. If the sound is low and muffled, it is usuallypvcplastic bag.3.combustion methodIf conditions permit,PEandpvcThese two materials can also be identified by burning. Generally, the flame is blue with a yellow upper end.PEWhen the plastic bag burns, it smells of paraffin. Difficult to burn, yellow flame with green top,pvcThe plastic bags gave off a pungent smell of hydrochloric acid.4.soaking methodAfter immersing the plastic packaging bag in water and pressing it into the water by hand,PEPlastic bags will float to the surface,pvcPlastic bags sink to the bottom(PEPlastic bags are less dense than water,pvcThe density of plastic packaging bags is greater than that of water;0.92gram/cubic centimeters and1.4gram/cubic centimeter).

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