Questions & Answers
Polybutylene terephthalate rods are made from: Ultradur, Pocan, Crastin, Valox, PBT: GF50, Natural, GF30, GF15.
International standards:
ISO 7792-1 - Thermoplastic polyesters. This standard defines tensile modulus, viscosity, and property classification. It also establishes requirements for processing conditions, coloring, additives, and fillers. This standard is often used as a "data sheet" for PBT pellets, which are then used to produce rods.
ISO 20028-1 is the basis for specifications and designation system for thermoplastic polyesters for extrusion and injection molding. This standard establishes the structure of the material technical specification, a classification system for the main physical and mechanical properties, methods for indicating the field of application, filler coding methods, material identification rules, and a designation system for polyesters.
ASTM D6100 is a standard for molded, extruded, and molded polyacetal resin blanks. This standard regulates inspection and testing methods, manufacturing quality, material requirements, dimensions and tolerances, product labeling, permissible porosity, surface quality, mechanical properties, and product classification.
| Diameter, mm | Weight of 1 m, kg |
| 10 | 0,103 |
| 15 | 0,231 |
| 20 | 0,412 |
| 25 | 0,643 |
| 30 | 0,926 |
| 40 | 1,646 |
| 50 | 2,572 |
| 60 | 3,702 |
| 80 | 6,581 |
| 100 | 10,289 |
| Indicator | Meaning |
| Density | 1,30–1,33 g/cm³ |
| Water absorption (24 hours) | 0,08–0,12 % |
| Friction coefficient | 0,25–0,40 |
| Thermal conductivity | 0,22–0,30 Wt/(m·К) |
| Shrinkage | 1,5–2,2 % |
| Property | Unfilled PBT | PBT GF30 |
| Tensile strength, MPa | 50–65 | 110–140 |
| Modulus of elasticity, MPa | 2200–2800 | 7000–11000 |
| Elongation at break, % | 5–15 | 2–4 |
| Hardness Shore D | 78–85 | 85–90 |
| Impact strength, kJ/m² | 4–8 | 6–12 |