Applications with adhesion to polar thermoplastics, e.g. ABS, PC and PC/ABS

Processing Method:
Injection Molding, Extrusion
Color / RAL DESIGN:
natural
 
 
Availability:
Globally
Manufacturing Site:
Germany, Malaysia, United States

Typical applications

  • Thumb wheels
  • Bumpers
  • Seals
  • Door sills
  • Function and design elements
  • Handles (tools and power tools, etc.)
  • Grommets
  • Soft touch surface (thumb wheels, push buttons, switches)

 

Material features

  • Adhesion to PC, ABS, PC/ABS, ASA, SAN
  • Insert molding possible
  • Soft touch surface
  • Controlled level of emission and odor, suitable for automotive interior
  • Colorable
  • Soft, non-sticky haptic

 

Regulations / Approvals

  • DIN 75201-B - Fogging
  • VDA 270 B3 - Odor
  • 49 CFR §571.302 (FMVSS 302)
  • DIN EN ISO 105-B06 Methode 3
  • VW 50123
  • BMW GS 93042
  • Mercedes-Benz DBL 5562
  • UL 94 HB

 

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Value Unit Standard
Hardness 50 Shore A DIN ISO 48-4
Density 1.100 g/cm3 DIN EN ISO 1183-1
Tensile Strength1 3.7 MPa DIN 53504/ISO 37
Elongation at Break1 600 % DIN 53504/ISO 37
Tear Resistance 15.0 N/mm ISO 34-1 Method B (b) (Graves)
Adhesion to ABS2 2.7 (A) N/mm VDI 2019 two-component injection molding
Adhesion to PC2 2.2 (A) 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.
All values published in this data sheet are rounded average values.
The expected shelf life of the TPE granules is a minimum of 24 months from the date of delivery, provided that the storage instructions are followed and the product is kept in the unopened original KRAIBURG TPE packaging.
Dry conditions at room temperature (below 40 °C/ 104 °F), away from heat sources and direct sunlight, must be maintained for proper storage. Contact with nitrogen oxides during storage should be avoided.
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.
The expected shelf life of the TPE granules is a minimum of 24 months from the date of delivery, provided that the storage instructions are followed and the product is kept in the unopened original KRAIBURG TPE packaging.
Dry conditions at room temperature (below 40 °C/ 104 °F), away from heat sources and direct sunlight, must be maintained for proper storage. Contact with nitrogen oxides during storage should be avoided.