| About |
|---|
| Kocetal WH702 is Mineral reinforced grade for high strength and wear resistance.&& |
| Product Description | |
|---|---|
| Supplier | Kolon |
| Generic | Copolymer Polyformaldehyde |
| Material Status | Commercial: Active |
| Features | Good Rigidity,Good wear resistance,HB |
| Availabilitys | North America,Latin America,Asia Pacific,Europe |
| Process Methods | Injection Molding |
| Technical Data | |||
|---|---|---|---|
| PHYSICAL | Nominal value | Unit | Test method |
| Density | 1.49 | g/cm³ | ASTM D792 |
| Melt Flow Rate | |||
| 190℃，2.16kg | 22 | g/10min | ASTM D1238 |
| Shrinkage rate | |||
| MD | 1.5 | % | ASTM D955 |
| Water absorption rate | |||
| Equilibrium, 23 ℃, 60% RH | 0.22 | % | ASTM D570 |
| IMPACT | Nominal value | Unit | Test method |
|---|---|---|---|
| Impact strength of cantilever beam notch | |||
| 23℃ | 45 | J/m | ASTM D256 |
| THERMAL | Nominal value | Unit | Test method |
|---|---|---|---|
| Hot deformation temperature | ASTM D648 | ||
| 0.45 MPa, unannealed | 163 | ℃ | |
| 1.8 MPa, unannealed | 135 | ℃ | |
| Melting temperature | 166 | ℃ | |
| Linear coefficient of thermal expansion | |||
| MD | 7.0E-5 | 1/℃ | ASTM D696 |
| Electrical performance | Nominal value | Unit | Test method |
|---|---|---|---|
| Surface resistivity | 1.0E+16 | ohms | ASTM D257 |
| Volume resistivity | 1.0E+14 | ohms·cm | ASTM D257 |
| Dielectric strength | 19 | kV/mm | ASTM D149 |
| Dielectric constant | 3.70 | ASTM D150 | |
| Dissipation factor | |||
| 1 MHz | 6.0E-3 | ASTM D150 |
| FLAME CHARACTERISTICS | Nominal value | Unit | Test method |
|---|---|---|---|
| Flame retardant level | HB | UL 94 |
| MECHANICAL | Nominal value | Unit | Test method |
|---|---|---|---|
| Rockwell hardness | |||
| M-level | 86 | ASTM D785 | |
| tensile strength | |||
| Yield, 23 ℃ | 75.0 | MPa | ASTM D638 |
| Tensile strain | |||
| Yield, 23 ℃ | 10 | % | ASTM D638 |
| Bending modulus | |||
| 23℃ | 4300 | MPa | ASTM D790 |
| bending strength | |||
| 23℃ | 115 | MPa | ASTM D790 |
| Process Conditions | |||
|---|---|---|---|
| injection | Nominal value | Unit | Test method |
| Drying temperature | 80.0 | °C | |
| Drying time | > 3.0 | hr | |
| Proposed maximum recycled material ratio | 30 | % | |
| Barrel rear temperature | 170 to 190 | °C | |
| Barrel middle temperature | 190 to 210 | °C | |
| Barrel front temperature | 200 to 220 | °C | |
| Nozzle temperature | 200 to 220 | °C | |
| Processing (melt) temperature | 165 to 220 | °C | |
| Mold temperature | 70.0 to 120 | °C | |
| Injection pressure | 68.6 to 118 | MPa | |
| Hold pressure | 98.1 | MPa | |
| Back pressure | 1.96 to 4.90 | MPa | |
| Notes |
|---|
| 1. Typical properties: these are not to be construed as specifications. |
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