Polyester Type MDI System Polyurethane Elastomer
Under conventional hardness, TDI and MDI products have no great difference in strength index, but will have obvious improvement in elasticity and wear resistance.
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Product Introduction
Characteristics of MDI raw materials
Under conventional hardness, TDI and MDI products have no great difference in strength index, but will have obvious improvement in elasticity and wear resistance.
MDI products will have better wear life and softer hand feeling.
Indicators | Polyester TDI | Polyester MDI |
Hardness (shA) | 90 | 90 |
Tensile strength (Mpa) | 51 | 48 |
Elongation (%) | 577 | 546 |
Tear strength (KN/m) | 107 | 102 |
Rebound (%) | 30 | 40 |
Wear (mm3) | 50 | 38 |
Specifications
Type | HJ2385M | HJ2390M | HJ2395M |
NCO content /% | 6.0±0.2 | 7.5±0.2 | 8.8±0.2 |
Appearance in 20℃ | Polyester type，white solid | ||
1,4-BD dosage (100gPUP )/g | 6.2 | 7.7 | 9.1 |
Viscosity(85℃)/mPa·s | 1300-1500 | 1100-1300 | 900-1100 |
Mixing temperature/℃（PUP/1,4BD） | 85/40 | 85/40 | 80/40 |
Catalyst addition dosage (1000gPUP)/g | 3-10 (the addition amount varies according to the gel time requirement) | ||
Gel time /min | 8—10 | 5—7 | 4—6 |
Vulcanization Time (100-110℃)/h | 24-48 | 24-48 | 24-48 |
Hardness（shore A） | 85±2 | 90±2 | 95±2 |
Tensile strength/MPa | 42-47 | 48-53 | 52-57 |
100% Modulus /MPa | 3—6 | 8—10 | 10—13 |
300%Modulus /MPa | 8—14 | 16—20 | 20—24 |
Elongation at break/ % | 530-630 | 580-680 | 480-580 |
Tear strength（KN/m） | 75-85 | 105-115 | 115-125 |
Rebound/ % | 45-47 | 42-45 | 40-43 |
Specific gravity（25℃）（g/ cm3） | 1.23 | 1.23 | 1.24 |
DIN Abrasion loss /mm³ | ≤38 | ≤38 | ≤36 |
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