1. Look at the color
The non-toxic polyethylene plastic is milky white and translucent. It has a paraffin waxy feel to the touch, and the texture is soft and bendable. It can float on the water surface when placed in water, and it will soften significantly in boiling water.
Non-toxic polyethylene plastic is easy to burn in fire, dripping wax when burning, swelling, and smells of petroleum. The flame is yellow, the lower end is blue, and a small amount of black smoke. It continues to burn after leaving the fire.
Poisonous polyvinyl chloride plastic is not as transparent as polyethylene, and it feels sticky to the touch. The texture is soft and elastic, and it becomes hard when cold. Sink in the water. It is not easy to burn, softens when burned, can be drawn, and has a pungent and spicy taste. The flame* is yellow, and the lower end is green with black smoke. Slowly extinguished after leaving the fire.
3. Look at the pull
Vacuum packaging bags made of new materials have high strength and toughness, while vacuum packaging bags made of recycled materials have characteristics such as tensile strength and toughness.