厦门科恒塑胶有限公司

xiamen keheng plastic co.,ltd

TECHNICAL
SUPPORT

PPR/PPH Piping System

1.2.1 Material Characteristics

Polypropylene (PP), also known as polypropylene, is a thermoplastic polymer used in a wide variety of applications including packaging and labeling, textiles (e.g., ropes, thermal underwear and carpets), stationery, plastic parts and reusable containers of various types, laboratory equipment, loudspeakers, automotive components, and polymer banknotes.

There are three general types of polypropylene: homopolymer, random copolymer, and block copolymer. The comonomer is typically used with ethylene.  

 Polypropylene Random Copolymer (PP-R) is formulated by adding randomly polymerized ethylene monomer to polypropylene homopolymer.  It decreases the polymer crystallinity and makes the polymer more transparent.

Polypropylene Homopolymer (PP-H) is another type of PP. It has better temperature & creep resistance than PPR, and with low temperature impact strength.
1.2.2 Introduction to PPR/PPH Piping System
1.2.3 Physical Properties
1.2.3.1 Physical Properties of PPR Pipes

Item
Unit
Standard Value
Standard
Density
kg/m³
900~920
ISO 1183
Vicat
≥91
ISO 2507
Tensile Strength
MPa
≥25
ISO 6259
Impact Strength(23 ℃)
KJ/m²
40
ISO 179
Vertical Retraction Ratio (135 ℃)
%
≤2
ISO 2505


1.2.3.2 Physical Properties of PPH Pipes

Item
Unit
Standard Value
Standard
Density
kg/m³
905~915
ISO 1183
Vicat
≥95
ISO 2507
Tensile Strength
MPa
≥27
ISO 6259
Impact Strength(23 ℃)
KJ/m²
50
ISO 179
Vertical Retraction Ratio (150 ℃)
%
≤2
ISO 2505