Authentic ultra high molecular weight polyethylene two discrimination

Two, buoyancy identification (wash)

This method is mainly identified by comparing the different densities of various plastics with the densities of water. We can put the samples of various materials into water 100 mm deep and determine the density of water by its ups and down in the water. The density of water is 1g/cm³.

name	UHMW-PE	HDPE	LDPE	PVC	PP	PETF
The proportion of	1.15-1.35	0.95	0.92	1.30-1.58	0.91	2.20-2.17

It can be seen that the floating products are not super high, while the ultra high molecular weight polyethylene is slightly denser than water, so it sinks slowly, and the ones that sink too fast are also super high. In addition, some manufacturers claim that the floating is ultra-high molecular weight polyethylene, which can be seen that most of its white polymer polyethylene products. Since this is an intuitive, crude test method, materials with a similar density to the ultra high products cannot be clearly identified. It needs to be tested in conjunction with other methods.