GEHR PBT®
GEHR PBT® is a semi-crystalline material from the polyester family of plastics and, due to its good thermal and mechanical properties, is counted among the polymer group of engineering plastics. It has a high surface hardness and good sliding and wear behavior.
Properties
- Physical Form
- Custom, Rods
- Custom
- Rods
Other characteristics
- Brand
- GEHR PBT
- Color
- Natural
- Density
- 1200.0 - 1350.0 kg/m³
- Features
Anti-Wear Properties, Chemical Resistant, Creep Resistant, Dimensional Stability, Easy To Paint, Electrically Insulating, Excellent Surface Hardness, Excellent Toughness, Good Mechanical Properties, Good Sliding Properties, Good Thermal Stability, Good UV Resistance, Good Weather Stability, High Hardness, High Stiffness, Semi Crystalline
- Polymer Name
- Polybutylene Terephthalate (PBT)
- Odor
- Odorless
- Markets
- Agriculture & Feed
- Automotive & Transportation
- Building & Construction
- Consumer Goods
- Electrical & Electronics
- Industrial
- Storage
The products shall be stored indoor to keep away from any source of degradation such as sunlight, UV-jets, ionizing radiation, chemicals.
- Machining
The product can be machined with standard machinery and tools. Before machining the product should be stored at room temperature 24 h. Evacuate swarf to prevent slipping or tripping. Observe the maximum allowable concentration of dust and formaldehyd levels on the working area which apply in your country. Wear safety goggles during machining. General dust limit value: Respirable dust (6 mg/m3); Inhalable dust (10 mg/m3 ).
- Properties
High stability, stiffness and toughness, even at low temperatures; Good creep resistance; High surface hardness; Good polishability; High dimensional stability; Easy to metallize; Good sliding properties; Good electrical insulation characteristics; High resistance to chemicals; Easy to paint; Good UV and weather resistance; Sensitive to hydrolysis
- Flame Rating
- UL 94 HB
- Insoluble In
- Water
- Technology
- Plastics
- Safety Measures
The general industrial safety measures should be considered. A thermal damage during machining should be avoided.
- Product Families
- Plastics — Parts, Shapes & Films
- Form and Condition
- Rods. Sheets / Solid
Technical data
Table 1 of 6
10 rows| Characteristic | Value | Unit | Method |
|---|---|---|---|
| Tensile Strength at Yield | 68 | MPa | ISO 527 |
| Elongation at Yield (S) | 8 | % | ISO 527 |
| Tensile Strength at Break | 61 | MPa | ISO 527 |
| Elongation at Break (R) | 15 | % | ISO 527 |
| Impact Strength (an) | 231 | kJ/m2 | ISO 179 |
| Notch impact Strength (ak) | 3 | kJ/m2 | ISO 179 |
| Ball Indentation (Rockwell Hardness) | 166 | MPa | ISO 2039 |
| Hardness | 83 | Shore D | ISO 868 |
| Flexural Strength (B 3,5 %) | 82 | MPa | ISO 178 |
| Modulus of elasticity (Et) | 3005 | MPa | ISO 527 |
Table 2 of 6
5 rows| Characteristic | Value | Unit | Method |
|---|---|---|---|
| Specific Gravity | 1.33 | — | ISO 1183 |
| Water Absorption | 0.4 | % | ISO 62 |
| Humidity Absorption | 0.25 | % | ISO 62 |
| Maximum Permissible Service Temperature | 130 | °C | UL746B |
| Lower Permissible Service Temperature | -60 | °C | UL746B |
Table 3 of 6
8 rows| Characteristic | Value | Unit | Method |
|---|---|---|---|
| Vicat Softening Point (VST/B/50) | 219 | °C | ISO 306 |
| Vicat Softening Point (VST/A/50) | 200 | °C | ISO 306 |
| Heat Deflection Temperature (HDT/B) | 170 | °C | ISO 75 |
| Heat Deflection Temperature (HDT/A) | 58 | °C | ISO 75 |
| Coefficient of Linear Thermal Expansion | 0.9 | K-1.10-4 | ISO 11359 |
| Glass Transition Temperature (Tg) | 143 | °C | ISO 3146 |
| Glass Transition Temperature (Tg) | 50 | °C | ISO 3146 |
| Melting Temperature (Tm) | 223 | °C | ISO 3146 |
Table 4 of 6
3 rows| Characteristic | Value | Unit |
|---|---|---|
| Density | 1.2 - 1.35 | g/cm³ |
| Melting Temperature (ca) | 220 - 230 | °C |
| Thermal Decomposition | min. 290 | °C |
Table 5 of 6
2 rows| Characteristic | Value | Unit | Method |
|---|---|---|---|
| Volume Resistivity | min. 10^13 | Ω.cm | IEC 60093 |
| Surface Resistivity (Ro) | min. 10^13 | Ω | IEC 60093 |
Table 6 of 6
4 rows| Characteristic | Value | Unit | Method |
|---|---|---|---|
| Bondability | Yes | — | — |
| Flammability | HB | — | UL 94 |
| Limiting Oxygen Index (LOI, 9) | 24 | % | ASTM D2863 |
| UV Stabilisation (6, 9) | Yes | — | — |
