MDI/ Polyether Polyol System Polyurethane Prepolymer For PU Dumbbell
MDI/ Polyether Polyol system Polyurethane Pre-polymer for Pu dumbbell
PU prepolymer for Rubber Dumbbell JYD90-A&JYD11-B
Composition: It consists of A&B component, A is polyol, and B is Iso-terminated polyurethane prepolymer.
Characteristics: Mix A&B in 40-50℃ , vacuum degasing , then cast into mould, then curing in 70-90℃ . Demould after 15-20min. The
finished products have good rebound and abrasion resistance properties.
Application: Used for making castor wheels and rubber dumbbell etc.
Storage: Store in a cool and dry place. If you can’t use one drum up at one time, please fill Nitrogen gas and seal the drum well.
Packing:20kg/drum or 200kg/drum.
|
B |
Type | JYD11-B |
| Appearance | Colorless or light yellow transparent liquid | |
| Viscosity(30℃) /mPa·s | 1300±200 | |
|
A |
Type | JYD90-A |
| Appearance | Yellow-green liquid | |
| Viscosity(30℃) /mPa·s | / |
| Ratio A: B(mass ratio) | 1:1 |
| Operation temperature/℃ | 40～50 |
| Gel time(35℃) */min | 2～3 |
|
Post curing time |
4-8hours under 90- 100℃ , Or keep in room temperature more than 3 days |
| Finished product properties | |
| Appearance | Yellow-green transparent elastomer |
| Hardness (shore A) | 90±2 |
| Tensile strength/MPa | 24 |
| Elongation at break/ % | 420 |
| Tear strength/(kN/m) | 65 |
| Rebound/ % | 38 |
| Specific gravity(25℃)(g/ cm3) | 1.13 |
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