What is the difference between HDPE pipe and PPH pipe. The special materials for PP pipes are divided into three generation
Materials
HDPE pipe special materials are divided into three generations. The first generation is modified by homopolypropylene, called PP-H. The second generation is polymerized by HDPE and PE block copolymerization technology, called PP-B. And the third generation is random. It is modified from polypropylene copolymer, called PP-R. The main differences are:
Differences
HDPE pipe and PPH pipe.The processability and environmental stress cracking resistance of the three materials are sequentially improved.
PP-B has poorer strength and better impact resistance, PP-H has better strength but poorer impact resistance (brittle), and PP-R avoids this defect.
The strength of PP-B and PP-H pipes decreases significantly after one year of manufacture, while PP-R pipes still maintain high strength after Long-term durability according to standards.
Some special varieties of imported PP-B have properties close to PP-R, and are also excellent pipe materials.
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