PBT Kanghui KH2100
PBT Kanghui KH2100
PBT Kanghui KH2100 is medium‑viscosity injection‑molding PBT resin. It features good melt flowability for easy processing, balanced comprehensive properties, low water absorption and good dimensional stability.
Main Applications
Automotive industry: auto spare parts, automotive‑lamp components.
Electrical & electronics: various fittings and insulating components.
Industrial machinery: mechanical structural parts.
Textile industry: civil & industrial textiles, faux‑rabbit‑hair yarn, spandex‑like fiber.
Other fields: sports equipment, polymer blends & alloys; also used for optical‑cable parts, wigs and eyelashes.
Physical‑Mechanical‑Thermal‑Electrical Properties
| Property Category | Property Item | Test Method / Condition | Test Data / Range | Unit |
|---|---|---|---|---|
| Physical Properties | Density | — | 1.30‑1.32 | g/cm³ |
| MFR (235℃/2.16 kg) | — | 26.0±3.0 | g/10min | |
| MFR (250℃/2.16 kg) | — | 38.0±3.0 | g/10min | |
| Water absorption | — | ≤0.4 | % | |
| Moisture content | — | ＜0.2 | % | |
| Mechanical Properties | Tensile strength | ISO 527 | ≥50 | MPa |
| Elongation at break | ISO 527 | 80‑200 | % | |
| Flexural strength | ISO 178 | ≥70 | MPa | |
| Izod notched impact (cantilever) | ISO 180 | ≥5.0 | kJ/m² | |
| Izod notched impact | — | ≥40 | J/m | |
| Thermal Properties | Melting point | — | ≥222 | ℃ |
| Electrical Properties | Dielectric strength (2 mm) | — | ≥20 | kV/mm |
| Chemical Properties | Intrinsic viscosity IV | GB/T 14190 / Q/KHS001‑2013 | 1.000±0.015 | dL/g |
| Carboxyl end‑group content | — | ≤24 / ≤30 | mol/t | |
| Color‑value L | — | ≥90 / ≥95 | — | |
| Color‑value b | — | 2.0±1.0 / 3.0±2 | — | |
| Ash content | — | ≤300 | mg/kg |
Injection‑Molding Parameters
| Process Stage | Property Item | Reference Range / Recommendation | Unit / Remarks |
|---|---|---|---|
| Pre‑treatment | Drying temperature | 100‑120 | ℃ |
| Drying time | 3‑6 | h | |
| Allowable moisture | ＜0.05 | % | |
| Injection molding | Rear barrel temp | 220‑240 | ℃ |
| Middle barrel temp | 230‑250 | ℃ | |
| Front barrel temp | 240‑260 | ℃ | |
| Nozzle temperature | 240‑260 | ℃ | |
| Mold temperature | 50‑80 | ℃ | |
| Melt temperature | 240‑260 | ℃ | |
| Injection pressure | Medium, adjust by part structure & dimension | MPa | |
| Hold pressure | 50%‑80% of injection pressure | MPa | |
| Back pressure | 0.3‑0.6 | MPa | |
| Screw speed | Adjust for equipment & cycle; avoid excessive shear heat | rpm | |
| Post‑processing | Annealing temp | 120‑140 (release internal stress, improve dimensional stability) | ℃ |
| Annealing time | 1‑2 h (depends on wall thickness) | h |
Note: All data above is for reference only.
