Model Number: 1805 Brand Name: Gaopin Key Specifications/Special Features: Gaopin toughening masterbatch is material which can improve the toughness of PPR, also toughening masterbatch can increase PPR pipes impact strength under cold and hot temperature, tensile strength at break, it can be used to produce PPR pipes with thinner walls and better pressure resistance than normal PPR pipes without it Chemical and physical propertyUnitTest standardsR200P4220 Normal PPR with toughening master batch (PP1805) MFR (230°C, 2.16kg) g/10 minute GB/T3682-2000 0.24 0.25 0.28 Tensile Strength at yield 　 MPa GB/T1040.2-2006 25.1 25 25.6 Tensile strength at break 　 27.3 31.1 31.5 Tensile strain at break 　 % 490 460 420 Flexural modulus 　 MPa GB/T1040.2-2006 796 755 823 Charpy impact strength 23°C KJ/m² GB/T1043.1-2008 79 85 102 0°C 9.4 7.3 50 -5°C 2.7 3 15 HDT 　 °C GB/T1643.2-2004 67 69 68