Applications with higher flame retardant requirements; halogen-free; UL 94 V-0 (1.5 mm); adhesion to PP

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

Typical applications

  • Gaskets for electric and electronic applications e.g. cable boxes
  • Cable management systems e.g. cable holders, cable glands and grommets
  • Electrical insulation for busbars
  • Applications in railway sector

 

Material features

  • Halogen-free (according to IEC 61249-2-21)
  • Fulfills railway requirements such as high LOI, low toxicity and smoke density
  • Self-extinguishing, no release of burning droplets
  • Adhesion to PP
  • In-process recycling possible
  • Precoloration in all colors
  • Temperature stability up to 85 °C
  • High glow-wire flammability index (GWFI)
  • No silicones added
  • Stability in conditions up to 60 °C and 75% humidity

 

Regulations / Approvals

  • UL 94 V-0 (1.5 mm)
  • DIN EN 45545-2 R26
  • IEC 60695-2-12:2021-10 (GWFI) 960 °C / 2 mm

 

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PDF file YellowCardFR2Series-
Value Unit Standard
Hardness 68 Shore A DIN ISO 48-4
Density 1.090 g/cm3 DIN EN ISO 1183-1
Tensile Strength1 5.0 MPa DIN 53504/ISO 37
Elongation at Break1 650 % DIN 53504/ISO 37
Tear Resistance 17.0 N/mm ISO 34-1 Method B (b) (Graves)
CS 72 h/23 °C 18 % DIN ISO 815-1 Method A
CS 24 h/70 °C 70 % DIN ISO 815-1 Method A
1Deviating from ISO 37 standard test piece S2 is tested with a traverse speed of 200 mm/min.
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 170 - 190 - 210 °C, max. 220 °C (340 - 370 - 410 °F, max. 430 °F)
Hotrunner Hot runner temperatures: 180 - 220 °C (356 - 428 °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 25 - 40 °C (77 - 104 °F)
Predrying The material is hygroscopic, residual moisture content might lead to processing problems and a reduction in the quality of the finished part. Drying conditions: 80 °C for 4-6 hrs. The maximum residual moisture of the material should not exceed 0,05%.
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.
Other Information In the processing of flame-retardant TPE, an interaction with some steels may occur. Please consult your tool and processing equipment manufacturer to select the appropriate steels.
Other Information Provide sufficient ventilation and punctiform suction at critical points.
Processing Guideline Extrusion
Cylinder Temperature 150 - 170 - 190 °C; max. 210 °C (300 - 340 - 375 °F; max. 410 °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 2,7 ... 3,5 : 1
Screens / Breaker Plate A breaker plate and a screen pack are recommended in the extruder configuration in order to increase pressure. In minimum two screen packs of 100 mesh are recommended.
Die Land <= 3 mm ( <= 0,12 in.)
Extruder Head Ca. 200 °C (390 °F)
Die Temperature Ca. 180 - 190 °C (374 - 410 °F)
Predrying Drying of the material for at least 6 hours at 80°C (175°F) is recommended. The moisture level of material has to be below 0.05 %. To avoid porosity in the profile a pre drying is recommended for wall thickness > 3mm.
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.
Other Information In the processing of flame-retardant TPE, an interaction with some steels may occur. Please consult your tool and processing equipment manufacturer to select the appropriate steels.
Other Information Provide sufficient ventilation and punctiform suction at critical points.
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.