A large number of holes are produced on the surface after the flanging. The flanging is short after the joint pressure.
The products after being processed or heated and melted have a slight plastic fragrance, and the products after cooling have no odor.
There is a pungent smell.
Five. Elongation at break
The elongation at break refers to the ratio of the length value to the original length when the specimen is broken, the higher the elongation at break, the better the flexibility of the product, the better the performance.
The quality of PE pipe:
Lengthening to 3.5 times no fracture.
The lengthening is easy to break, and the toughness is poor.
Six, oxidation induction time
The induction time of oxidation is the time to start the automatic catalytic oxidation reaction of samples under high temperature oxygen condition, and it is an index to evaluate the thermal degradation ability of materials in processing, storage, welding and application. The longer the oxidation induction time is, the better the product is aging and the better the performance.