Material description:
High-density polyethylene, also known as low-pressure polyethylene, is a kind of translucent shape with high crystallinity and a certain degree of non-polar surface. PE has excellent resistance to most household and industrial chemicals.[Basic characteristics] HDPE is an opaque white wax-like material with a specific gravity lighter than water, with a specific gravity of 0.941~0.960. It is soft and tough, but slightly harder than LDPE, and also slightly stretchable, non-toxic and tasteless.
[Combustion characteristics] It is flammable and can continue to burn after leaving the fire. The upper end of the flame is yellow and the lower end is blue. When burning, it will melt, there will be liquid dripping, and no black smoke will emerge. At the same time, it emits the smell of paraffin burning.
[Main advantages] Acid and alkali resistance, organic solvent resistance, excellent electrical insulation, and can still maintain a certain toughness at low temperature. Surface hardness, tensile strength, rigidity and other mechanical strengths are higher than LDPE, close to PP, tougher than PP, but the surface finish is not as good as PP.
[Main disadvantages] Poor mechanical properties, poor ventilation, easy deformation, easy aging, easy to become brittle, less brittle than PP, easy to stress cracking, low surface hardness, easy to scratch. Difficult to print, when printing, surface
discharge treatment is required, no electroplating, and the surface is dull.