Applications with optimized CS and adhesion to polar thermoplastics, e.g. ABS, PC, PC/ABS and PBT
Processing Method:
Injection Molding, Extrusion
Injection Molding, Extrusion
Color / RAL DESIGN:
natural
natural
Availability:
Globally
Globally
Manufacturing Site :
Germany, Malaysia, United States
Germany, Malaysia, United States
Typical applications
- Seals
- Function and design elements
- Cable clips
- Bumpers
- Grommets
- Soft touch surface (thumb wheels, push buttons, switches)
Material advantages
- Adhesion to PC, ABS, PC/ABS, ASA, SAN
- Adhesion to PBT
- Optimized compression set
- Optimized mechanical properties
Regulations / Approvals
- 49 CFR §571.302 (FMVSS 302)
- VW 50123
- BMW GS 93042
- Mercedes-Benz DBL 5562
- UL 94 HB
| Value | Unit | Standard | |
|---|---|---|---|
| Hardness | 77 | Shore A | DIN ISO 48-4 |
| Density | 1.100 | g/cm3 | DIN EN ISO 1183-1 |
| Tensile Strength1 | 9.0 | MPa | DIN 53504/ISO 37 |
| Elongation at Break1 | 600 | % | DIN 53504/ISO 37 |
| Tear Resistance | 23.0 | N/mm | ISO 34-1 Method B (b) (Graves) |
| CS 72 h/23 °C | 26 | % | DIN ISO 815-1 Method A |
| CS 24 h/70 °C | 48 | % | DIN ISO 815-1 Method A |
| CS 24 h/100 °C | 67 | % | DIN ISO 815-1 Method A |
| Adhesion to ABS2 | 5.5 (C) | N/mm | VDI 2019 two-component injection molding |
| Adhesion to PC2 | 9.5 (D) | N/mm | VDI 2019 two-component injection molding |
| Adhesion to PC/ABS2 | 9.5 (D) | N/mm | VDI 2019 two-component injection molding |
1Deviating from ISO 37 standard test piece S2 is tested with a traverse speed of 200 mm/min.
2The adhesion quality depends on mold design, product geometry and process parameters.
2The adhesion quality depends on mold design, product geometry and process parameters.
| All values published in this data sheet are rounded average values. |
| The shelf life of the TPE granules is 24 months from delivery if storage instructions are observed and the product is stored in the unopened original KRAIBURG TPE packaging. Store in dry conditions at room temperature (below 40 °C) away from heat sources and direct sunlight! Contact with nitrogen oxides must be avoided during storage! |
| For further information and individual custom solutions please contact our customer service. |
| Processing Guideline Injection Molding | |
|---|---|
| Cylinder Temperature | 180 - 210 - 240 °C, max. 250 °C (360 - 410 - 460 °F, max. 480 °F) |
| Hotrunner | Hot runner temperatures: 200 -250 °C (390 - 480 °F). The runner should be empty after a maximum of 2 - 3 shots. |
| Injection Pressure | 200 - 1000 bar (2900 - 14504 psi) (depending on the size and weight of the part). |
| Injection Rate | In general, the fill time should not be more than 1–2 seconds. |
| Hold Pressure | We recommend to derive the optimum hold pressure from determining the solidification point, starting with 40 % - 60 % of the required injection pressure. |
| Back Pressure | 20 - 100 bar; if color batches are used, higher back pressure is necessary. |
| Screw Retraction | If an open nozzle is used processing with screw retraction is advisable. |
| Mold Temperature | The mold temperature depends on the hard component. A temperature exceeding 80 °C (175 °F) should be avoided. The common temperature is 40 - 60 °C (105 - 140° F). |
| Predrying | To achieve optimum mechanical values, drying the material for 2 - 4 hours at 60 - 80 °C (140 - 175 °F) is recommended. |
| Needle Valve | With materials < 50 Shore A the use of a needle valve is advisable. |
| Screw Geometry | Standard 3-zone polyolefine screw. |
| Residence Time | The residence time is to be set as short as possible with a maximum of 10 minutes. |
| Cleaning Recommendation | For cleaning and purging of the machine it is appropriate to use polypropylene or polyethylene. Machine must be PVC-free. |
| Processing Guideline Extrusion | |
|---|---|
| Cylinder Temperature | 160 - 180 - 200 °C (320 - 360 - 390 °F). For Coextrusion with engineering thermoplastics temperature profile should be increased up to 30 °C (85 °F); maximum 230 °C (440 °F) |
| Screw Geometry | Standard three-zone screw (e.g. polyolefin screw). The screw must be able to provide sufficient shearing. |
| L/D Ratio | At least 25 |
| Compression Ratio | At least 3 : 1 |
| Screens / Breaker Plate | A breaker plate and a screen pack are generally recommended in the extruder configuration in order to increase pressure. |
| Die Land | <= 3 mm ( <= 0,12 in.) |
| Extruder Head | Ca. 220 °C (430 °F) |
| Die Temperature | Ca. 220 °C (430 °F) |
| Predrying | The material is hygroscopic, residual moisture content might lead to processing problems and a reduction in the quality of the finished part. The use of a desiccant dehumidifying dryer is recommended. Drying conditions: 80 °C for 4-6 hrs; maximum dew point of the inlet air: -25 °C. The maximum residual moisture of the material should not exceed 0,02 %. |
| Calibration | Generally not necessary; support elements may be required when extruding THERMOLAST® compounds with high hardness or when coextruding with standard thermoplastics. |
| Cleaning Recommendation | For cleaning and purging of the machine it is appropriate to use polypropylene or polyethylene. Machine must be PVC-free. |