CNTs/HDPE Masterbatches

CNTs/HDPE Masterbatches

Regular price $0.00

Product Code: CNB-8-TNHDPE


[1] The code of matrix resin can be changed according to the customer's demand.
[2] Typical values refer to the average laboratory data, which is used only for reference when used, not as the
standard of the product.
[3] The test sample was a round sheet, which was prepared by hot compression moulding with a thickness of
[4] The content of CNTs in the masterbatch was diluted to 3% by matrix resin through twin screw extruder.
Then the round sheet was prepared by hot compression moulding with a thickness of 1.4mm. And it is tested
by a hand-held surface resistance meter.

The specimens were made by compression moulding, and its thickness is 1.4mm. The resistivity were measured by four probe method.

  • Decreased risk of chemical contamination
  • Excellent electrical conductivity
  • Lower application amount than carbon black
  • Good for flame retardancy.
Proportion Burning Phenomena Time UL94
A PP 68% FR 32% 1st:flame, non-drops t1<10s V-2
2nd:flame, drops t2<10s
B PP 48% FR 32wt% CB 10wt% 1st:non-flame, non-drops t1>30s NG
2nd:non-flame,non-drops t2>30s
C PP 48% FR 32wt% CNTs 10wt% 1st:non-flame, non-drops t1<1s V-0
2nd:non-flame,non-drops t2<10s

FR: Fire retardant(24%DBDPO+8%Sb2O3)

CB: Carbon black


1.This masterbatches are stored in the same way as ordinary modified polyethylene without drying before
2. If you produce some kind of special antistatic material by diluting this masterbatch, it is recommended
to use double screw extruder, and choose screw combination with strong shear force as far as possible.
3. CNTs have a significant viscosity-increasing effect on the polymer. The more CNTs are added, the more
significant the effect is.
4. Different polymers have different percolation threshold.
5. When the type and content of CNTs are constant, for the same kind of polymer, the higher the melting
index, the easier the CNTs are dispersed and the lower the electrical resistivity.
6. Different molding methods have a very prominent impact on the electrical conductivity of the product.
If the material remains unchanged, the product's resistivity is like this: injection molded > the extruded > the hot compression molded.
7. The process conditions also have influence on the product's resistivity. For example, during injection molding, high mold temperature or high pressure and low speed can make the product's resistivity lower.
8.The customer needs to obtain the best molding process through experiments.
9.The resistivity measured by different test methods or standards is usually inconsistent and cannot be directly compared with each other.


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