MDI Prepolymer
hardness: ntug A 75A - ntug A 95A
Cov khoom muaj cov yam ntxwv ntawm kev hnav tsis kam, resilience thiab zoo heev mechanical zog.
Siv los ua lwm yam khoom siv polyurethane elastomer xws li roj hmab log, sieve phaj thiab sealing rings.
|
Qauv
| D2560 | d2575 ua | d2590 ua | d3565 ua | d3575 ua | d3590 ua |
| NCO/% | 6.0 ± 0.2 | 7.5 ± 0.2 | 9.0 ± 0.2 | 6.5 ± 0.2 | 7.5 ± 0.2 | 9.0 ± 0.2 |
| Lub xeev ntawm 20 ℃ | PTMG system, dawb khoom | Polyester system, dawb khoom | ||||
| BDO100g Prepolymer / g | 6.1 | 7.8 ib | 9.3 | 6.8 | 7.8 ib | 9.3 |
| Viscosity (85 ℃) / mPa · s | 1400 | 1000 | 750 | 1400 | 1200 | 1000 |
| Sib tov kub / ℃ (Prepolymer / 1,4BD) | 80/40 ib | 80/40 ib | 80/40 ib | 80/40 ib | 80/40 ib | 80/40 ib |
| Lub sijhawm gel / min | 10 | 8 | 7 | 10 | 8 | 7 |
| Tom qab vulcanization lub sij hawm (110 ℃) / h | 48 | 48 | 48 | 48 | 48 | 48 |
| Hardness (Shore A) | 87 ± 2 | 90 ± 2 | 95 ± 2 | 85 ± 2 | 90 ± 2 | 95 ± 2 |
| 100% Modulus / MPa | 6 | 9.2 ib | 12.6 | 5 | 8.6 | 12.3 |
| 300% Modulus / MPa | 17 | 16.6 | 18.9 Nws | 10 | 19.7 ib | 29.1 ib |
| Tensile zog / MPa | 44 | 43 | 45 | 50 | 46 | 55 |
| Elongation /% | 472 ib | 683 ua | 500 | 540 | 580 | 530 |
| Tear zog / (KN / m) | 75 | 110 | 130 | 82 | 117 | 132 |
| Rov qab /% | 61 | 64 | 55 | 43 | 35 | 39 |
| Qhov ceev (24 ℃) / （g / cm3) | 1.11 | 1.11 | 1.12 | 1.23 | 1.26 | 1.24 |
| Din hnav /mm³ | 36 | 44 | 44 | 32 | 35 | 38 |
Sau koj cov lus ntawm no thiab xa tuaj rau peb
