PBT CHANG CHUN 1100
PBT CHANG CHUN 1100
PBT CHANG CHUN 1100 is an unreinforced, injection‑molding, medium‑viscosity PBT resin. Featuring good toughness, excellent electrical performance, chemical resistance and well‑balanced mechanical properties, it is widely used in various applications.
Main Applications
Electrical & Electronics: connectors, switch components, household appliances and accessory parts.
Automotive industry: radiator grilles, body panels, wheel covers, door‑window components.
Household appliances: food‑processing blades, vacuum‑cleaner parts, electric fans, hair‑dryer housings, coffee utensils.
Industrial parts: compounding raw materials, fastener assemblies, computer keyboards, stationery housings, toggle switches.
Other fields: instrument‑meter components, mechanical parts.
Physical‑Mechanical‑Thermal‑Electrical Properties
| Property Category | Property Item | Test Standard / Condition | Test Data / Range | Unit |
|---|---|---|---|---|
| Physical Properties | Density | ASTM D792 | 1.30‑1.32 | g/cm³ |
| Water absorption (24 h,23 ℃) | ASTM D570 | 0.06 | % | |
| Molding shrinkage (flow direction) | ASTM D955 | 0.8‑1.8 | % | |
| Molding shrinkage (transverse direction) | ASTM D955 | 1.0‑2.0 | % | |
| Glass‑fiber content | Ash test | 0 | % | |
| Mechanical Properties | Tensile strength | ASTM D638 | 53.9‑58.8 | MPa |
| Elongation at break | ASTM D638 | 120‑180 | % | |
| Flexural strength | ASTM D790 | 78.4‑83.3 | MPa | |
| Flexural modulus | ASTM D790 | ≥2400 | MPa | |
| Izod notched impact strength | ASTM D256 | 5.0‑6.0 | kg·cm/cm | |
| Rockwell hardness | ASTM D785 | 85‑90 | M‑Scale | |
| Thermal Properties | HDT @1.8 MPa | ASTM D648 | 60 | ℃ |
| HDT @0.45 MPa | ASTM D648 | 155 | ℃ | |
| Melting point | DSC | 225 | ℃ | |
| Coefficient of linear thermal expansion | ASTM D696 | 9×10⁻⁵ | cm/cm/℃ | |
| UL94 flame rating | UL94 | HB | class | |
| Electrical Properties | Volume resistivity | ASTM D257 | ＞10¹⁵‑＞10¹⁶ | Ω·cm |
| Surface resistivity | ASTM D257 | ＞10¹³‑＞10¹⁴ | Ω | |
| Dielectric strength | ASTM D149 | 20 | kV/mm | |
| Relative permittivity (60 Hz) | ASTM D150 | 3.3 | — | |
| Dissipation factor (60 Hz) | ASTM D150 | 0.001 | — | |
| Arc resistance | ASTM D495 | 120 | sec |
Injection‑Molding Parameters
| Process Stage | Parameter Item | Reference Range / Recommendation | Unit / Remarks |
|---|---|---|---|
| Pre‑treatment | Drying temperature | 120‑150 | ℃ |
| Drying time | 6‑8 h @120 ℃; 2‑4 h @150 ℃ (bed thickness＜30 mm) | h | |
| Target moisture content | ＜0.02 | % | |
| Drying equipment | Desiccant dryer recommended | — | |
| Injection Molding | Rear barrel temperature | 220‑240 | ℃ |
| Middle barrel temperature | 230‑250 | ℃ | |
| Front barrel temperature | 240‑260 | ℃ | |
| Nozzle temperature | Slightly lower than or equal to front zone | ℃ | |
| Melt temperature | 240‑260; do NOT exceed 280 ℃(decomposition) | ℃ | |
| Mold temperature | 40‑100 ℃; preferred:70‑90 ℃, ΔT ≤10 ℃ | ℃ | |
| Injection pressure | 50‑100 | MPa | |
| Injection speed | Relatively fast(PBT fast‑cooling characteristic) | — | |
| Back pressure | 10‑15 % of injection pressure | MPa | |
| Screw speed | 25‑60; max ≤80 | rpm | |
| Mold | Runner type | Round runner recommended | — |
| Gate type | All gate types are applicable | — | |
| Mold cooling | Uniform mold temperature, temperature difference ≤10 ℃ | — | |
| Post‑processing | Cycle time | 15‑60 | s |
| Annealing (if required) | 120‑150 ℃ for residual‑stress reduction & dimensional stability | ℃ | |
| Annealing time | 1‑2 h, adjust by wall thickness | h |
Note: All data above is for reference only.
