| About |
|---|
| Acetal copolymer grade JPAC is a medium viscosity polymer providing optimum performance in general purpose injection molding and extrusion of thin walled tubing and thin gauge film.&& |
| Product Description | |
|---|---|
| Generic | Paraformaldehyde |
| Material Status | Commercial: Active |
| Features | Excellent Processability,Good flexibility,Good surface appearance,Good Dimensional Stability,Copolymer,HB |
| Availabilitys | North America |
| Process Methods | Injection Molding |
| Technical Data | |||
|---|---|---|---|
| PHYSICAL | Nominal value | Unit | Test method |
| Density | 1.41 | g/cm³ | ASTM D792 |
| Melt Flow Rate | |||
| 190℃，2.16kg | 9.0 | g/10min | ASTM D1238 |
| Shrinkage rate | ASTM D955 | ||
| MD | 2.2 | % | ASTM D955 |
| TD | 1.8 | % | ASTM D955 |
| Water absorption rate | ASTM D570 | ||
| 24hr | 0.22 | % | ASTM D570 |
| saturated | 0.80 | % | ASTM D570 |
| Equilibrium, 23 ℃, 50% RH | 0.10 | % | ASTM D570 |
| IMPACT | Nominal value | Unit | Test method |
|---|---|---|---|
| Impact strength of cantilever beam notch | |||
| 23℃ | 69 | J/m | ASTM D256 |
| Notched impact strength of cantilever beam | 1100 | J/m | ASTM D256 |
| Tensile impact strength | |||
| 23℃ | 147 | kJ/m² | ASTM D1822 |
| THERMAL | Nominal value | Unit | Test method |
|---|---|---|---|
| Hot deformation temperature | ASTM D648 | ||
| 0.45 MPa, unannealed | 158 | ℃ | ASTM D648 |
| 1.8 MPa, unannealed | 110 | ℃ | ASTM D648 |
| Glass transition temperature | -50.0 | ℃ | ASTM E1356 |
| Vicat Softening Temp | 162 | ℃ | ASTM D1525 |
| Melting temperature | 165 | ℃ | |
| Linear coefficient of thermal expansion | |||
| MD | 8.5E-5 | 1/℃ | ASTM D696 |
| specific heat | 1460 | J/kg/℃ | ASTM C351 |
| Thermal conductivity coefficient | 0.23 | W/m/K | ASTM C177 |
| 1.5 mm | 105 | ℃ | UL 746 |
| 3.0 mm | 105 | ℃ | UL 746 |
| 6.1 mm | 105 | ℃ | UL 746 |
| 1.5 mm | 90.0 | ℃ | UL 746 |
| 3.0 mm | 90.0 | ℃ | UL 746 |
| 6.1 mm | 90.0 | ℃ | UL 746 |
| Relative temperature index | UL 746 | ||
| Electrical performance | UL 746 | ||
| Impact mechanical performance | UL 746 | ||
| 1.50 mm | 90.0 | ℃ | UL 746 |
| 3.00 mm | 100 | ℃ | UL 746 |
| 6.10 mm | 100 | ℃ | UL 746 |
| Electrical performance | Nominal value | Unit | Test method |
|---|---|---|---|
| Surface resistivity | 1.3E+16 | ohms | ASTM D257 |
| Volume resistivity | 1.0E+14 | ohms·cm | ASTM D257 |
| Dielectric strength | 20 | kV/mm | ASTM D149 |
| Dielectric constant | ASTM D150 | ||
| 100 Hz | 3.70 | ASTM D150 | |
| 10 kHz | 3.70 | ASTM D150 | |
| 1.00 GHz | 3.70 | ASTM D150 | |
| 1.02 mm，1 kHz | 3.70 | ASTM D150 | |
| 1.02 mm，1 MHz | 3.70 | ASTM D150 | |
| Dissipation factor | ASTM D150 | ||
| 100 Hz | 1.0E-3 | ASTM D150 | |
| 10 kHz | 1.5E-3 | ASTM D150 | |
| 1.02 mm，1 kHz | 1.0E-3 | ASTM D150 | |
| 1.02 mm，1 MHz | 6.0E-3 | ASTM D150 | |
| Arc resistance | 240 | sec | ASTM D495 |
| FLAME CHARACTERISTICS | Nominal value | Unit | Test method |
|---|---|---|---|
| Flame retardant level | HB | UL 94 |
| MECHANICAL | Nominal value | Unit | Test method |
|---|---|---|---|
| Rockwell hardness | |||
| M-level | 80 | ASTM D785 | |
| Tensile modulus | 2830 | MPa | ASTM D638 |
| tensile strength | |||
| Yield, 23 ℃ | 60.7 | MPa | ASTM D638 |
| Tensile strain | |||
| Fracture, 23 ℃ | 60 | % | ASTM D638 |
| Bending modulus | |||
| 23℃ | 2590 | MPa | ASTM D790 |
| bending strength | |||
| fracture | 89.6 | MPa | ASTM D790 |
| compressive strength | 110 | MPa | ASTM D695 |
| shear strength | |||
| 23℃ | 53.1 | MPa | ASTM D732 |
| friction coefficient | ASTM D1894 | ||
| Metal – Static | 0.15 | ASTM D1894 | |
| With oneself – static | 0.35 | ASTM D1894 | |
| Taber abraser | ASTM D1044 | ||
| 1000 cycles, CS-17 wheel | 14.0 | mg | ASTM D1044 |
| 1000 cycles, CS-17F wheel | 6.00 | mg | ASTM D1044 |
| 1000 cycles, CS-18 wheel | 3.00 | mg | ASTM D1044 |
| Process Conditions | |||
|---|---|---|---|
| injection | Nominal value | Unit | Test method |
| Drying temperature | 82 | °C | |
| Drying time | 3.0 | hr | |
| Proposed maximum recycled material ratio | 25 | % | |
| Barrel rear temperature | 171 | °C | |
| Barrel middle temperature | 182 | °C | |
| Barrel front temperature | 188 | °C | |
| Nozzle temperature | 193 | °C | |
| Processing (melt) temperature | 182 to 199 | °C | |
| Mold temperature | 77 to 93 | °C | |
| Injection pressure | 100 to 138 | MPa | |
| Hold pressure | 89.6 to 138 | MPa | |
| Back pressure | 0.00 to 0.345 | MPa | |
| Screw speed | 20 to 40 | rpm | |
| Clamping force | 4.1 to 6.9 | kN/cm² | |
| Cushion | 3.18 to 6.35 | mm | |
| Screw length to diameter ratio | 16.0:1.0 to 24.0:1.0 | ||
| Notes |
|---|
| 1. Typical properties: these are not to be construed as specifications. |
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