PBT CHANG CHUN 1100‑211M
PBT CHANG CHUN 1100‑211M
PBT CHANG CHUN 1100‑211M is a well‑balanced, unreinforced, medium‑viscosity injection‑molding engineering plastic. It delivers good toughness, favorable heat resistance, excellent chemical resistance and electrical properties.
Main Applications
Household appliances: food‑processing blades, vacuum‑cleaner components, electric fans, hair‑dryer housings, coffee‑maker parts.
Electrical components: switches, motor housings, fuse boxes, computer‑keyboard keytops.
Automotive industry: radiator grilles, body panels, wheel covers, door‑window parts.
Electronics & electrical: connectors, switch components, home‑appliance parts and accessories.
Physical‑Mechanical‑Thermal‑Electrical Properties
| Property Category | Property Item | Test Standard / Condition | Test Data / Range | Unit |
|---|---|---|---|---|
| Physical Properties | Density | ASTM D792 / ISO 1183 | 1.31 | g/cm³ |
| MFR (250 ℃ / 2.16 kg) | ASTM D1238 | 18‑22 (or 27) | g/10min | |
| Water absorption (24 h) | ASTM D570 | 0.06 | % | |
| Molding shrinkage (flow direction) | ASTM D955 | 0.12‑0.18 | % | |
| Intrinsic viscosity | ASTM D‑2857 | 1.00±0.02 | dl/g | |
| Carboxyl end‑group content | Titration method | ≤50 | meq/kg | |
| Mechanical Properties | Tensile strength | ISO 527‑2 | 55.0 | MPa |
| Tensile strength | ASTM D638 | 500‑600 | kg/cm² | |
| Elongation at break | ISO 527‑2 | ＞120 | % | |
| Elongation at break | ASTM D638 | ≥120 | % | |
| Flexural strength | ISO 178 | 83.0 | MPa | |
| Flexural modulus | ISO 178 | 2450 | MPa | |
| Rockwell hardness (M‑scale) | ASTM D785 | 87 | — | |
| IZOD notched impact | ASTM D256 | ≥5.0 | kg‑cm/cm | |
| Thermal Properties | HDT @1.8 MPa | ASTM D648 / ISO 75‑2/A | 60.0 | ℃ |
| HDT @0.45 MPa | ISO 75‑2/B | 155 | ℃ | |
| Melting point (DSC) | DSC | 223‑227 | ℃ | |
| CLTE (flow direction) | ASTM D696 | 9.0×10⁻⁵ | cm/cm/℃ | |
| UL94 rating (3.2 mm) | UL94 | HB | class | |
| Electrical Properties | Volume resistivity | IEC 60093 | 1.0E+15 | Ω·cm |
| Surface resistivity | IEC 60093 | 1.0E+13 | Ω | |
| Dielectric strength (2 mm) | ASTM D149 / IEC 60243‑1 | 20 | kV/mm | |
| Relative permittivity | ASTM D150 | 3.30 | — | |
| Dissipation factor | ASTM D150 | 0.0010 | — | |
| Arc resistance | ASTM D495 | 120 | sec |
Injection‑Molding Parameters
| Process Stage | Parameter Item | Reference Range / Recommendation | Unit / Remarks |
|---|---|---|---|
| Pre‑treatment | Drying temperature | 105‑140 (commonly 120‑140) | ℃ |
| Drying time | 6 h@105 ℃; 4 h@120 ℃; 2 h@140 ℃ (bed thickness＜30 mm) | h | |
| Target moisture content | ＜0.02 | % | |
| Drying equipment | Desiccant dryer recommended | — | |
| Injection Molding | Rear barrel temperature | 220‑240 (reference setting) | ℃ |
| Middle barrel temperature | 230‑250 (reference setting) | ℃ | |
| Front barrel temperature | 240‑260 (reference setting) | ℃ | |
| Nozzle temperature | Slightly lower than or equal to front zone | ℃ | |
| Melt temperature | 235‑260; keep 240‑260, avoid over 280 ℃ (decomposition) | ℃ | |
| Mold temperature | 70‑80, ΔT ≤10 ℃ | ℃ | |
| Injection pressure | 50‑100 | MPa | |
| Injection speed | Relatively fast (PBT fast‑solidification 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) | Reduce residual stress, improve dimensional stability | ℃ | |
| Annealing time | Adjust according to wall thickness | h |
Note: All data above is for reference only.
