Blister machine Blister material PVC identification method Water immersion method

Immerse the plastic bag in water, press it into the water by hand, the polyethylene that can surface is polyethylene, and the one that sinks to the bottom is polyvinyl chloride (the density of polyethylene is less than that of water, and the density of polyvinyl chloride is greater than that of water; 0.92g/cm3 and 1.4g/cm3).

It is also possible to take a copper wire and burn it to red in the fire. Then, contact the copper wire with the plastic film used for the test to produce chemical changes, and then put the copper wire dipped in the plastic component back into the flame. At this time, it is necessary to observe carefully. If there is a colorful and dazzling green flame, it means that this plastic material contains chlorine and belongs to the polyvinyl chloride material.