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Processing Conditions

RTP 1000 Series — Polybutylene Terephthalate (PBT)
EMI Shielding Compounds

Typical Injection
Molding Conditions 		English   SI Metric  
[Temperatures]
    Rear zone 440 - 470 °F 227 - 243 °C
    Center zone 430 - 460 °F 221 - 238 °C
    Front zone 420 - 450 °F 216 - 232 °C
    Melt 400 - 480 °F 204 - 249 °C
    Mold 150 - 250 °F 66 - 121 °C
 
[Pressures]
    Injection 10000 - 15000 psi 69 - 103 MPa
    Hold 5000 - 10000 psi 34 - 69 MPa
    Back 50 - 100 psi 0.34 - 0.69 MPa
 
[Speeds]
    Fill 0.5 - 2 in/sec 13 - 51 mm/sec
    Screw 30 - 60 rpm 30 - 60 rpm
 
[Drying]
    Time & Temperature 4 Hrs @ 250 °F 4 Hrs @ 121 °C
    Dew Point -20 °F -29 °C
    Moisture Content 0.03 % 0.03 %
 
[Notes]
 
  • Remove hopper magnets
  • Uses a reverse barrel profile
  • Allow 4 to 5 shots to properly disperse the conductive fibers. The surface finish should have slight silver streaks (not clumps), indicating proper fiber dispersion.
  • This information is intended to be used only as a guideline for designers and processors of modified thermoplastics for injection molding. Because injection mold design and processing is complex, a set solution will not solve all problems. Observation on a "trial and error" basis may be required to achieve desired results.
  • No information supplied by RTP Company constitutes a warranty regarding product performance or use. Any information regarding performance or use is only offered as suggestion for investigation for use, based upon RTP Company or other customer experience. RTP Company makes no warranties, expressed or implied, concerning the suitability or fitness of any of its products for any particular purpose. It is the responsibility of the customer to determine that the product is safe, lawful and technically suitable for the intended use. The disclosure of information herein is not a license to operate under, or a recommendation to infringe any patents.