TPE German Kraiburg TC7PAZ
KRAIBURG TPE TC7PAZ (Germany)
TC7PAZ is a thermoplastic elastomer specially developed for over‑molding onto polyamide (PA). It is ideal for parts requiring comfortable soft‑touch surface and robust bonding onto hard substrates. It features excellent adhesion to PA, pleasant surface haptics, weather resistance, UV resistance and good colorability.
Main Applications
Gaskets, seals, manual & power‑tool handles, selector wheels, cable clips.
Property Specifications
| Category | Test Item | Test Standard | Value / Range | Unit |
|---|---|---|---|---|
| Physical Properties | Density | ISO 1183 | 1.15 | g/cm³ |
| Hardness (Shore A) | ISO 868 / DIN ISO 7619‑1 | 70‑71 | Shore A | |
| Mechanical Properties | Tensile strength at break | ISO 37 / DIN 53504 | 3.0‑3.5 | MPa |
| Elongation at break | ISO 37 / DIN 53504 | 350 | % | |
| Tear strength | ISO 34‑1 | 17 | kN/m (N/mm) | |
| 100 % modulus | ISO 37 | 1.8 | MPa | |
| 300 % modulus | ISO 37 | 2.5 | MPa | |
| Long‑term Properties | Compression set (23 °C, 72 h) | ISO 815 | 35 | % |
| Compression set (70 °C, 24 h) | ISO 815 | 76 | % | |
| Compression set (100 °C, 24 h) | ISO 815 | 80 | % | |
| Other Properties | UL flammability rating | UL 94 | HB | ‑ |
Processing Parameters
| Parameter | Recommended Setting | Unit | Notes |
|---|---|---|---|
| Pre‑drying temperature | 60‑80 | °C | |
| Pre‑drying time | 2‑4 | h | |
| Barrel temp. for over‑mold PA6 | Rear:230‑250；Middle:250‑260；Front:260‑270 | °C | Max. 270 °C |
| Barrel temp. for over‑mold PA6.6 | Rear:245‑260；Middle:260‑270；Front:270‑280 | °C | Max. 280 °C |
| Mold temperature | 40‑60 | °C | Avoid ＞80 °C |
| Injection pressure | 200‑1000 | bar | Depends on part size & weight |
| Back pressure | 20‑100 | bar | Higher back‑pressure may be needed for coloration |
| Screw geometry | Standard 3‑stage polyolefin screw | ‑ |
All data above are for reference only.
