Nucleating Masterbatch BT-901
Introduction:
BT-901 is a masterbatch for use as a nucleating agent in gas-injection applications.
It is specially designed for easy incorporation into insulation raw material compound for
processing Physical Foaming Insulated RG series coaxial cables.The compound consists
of base resin and more than 4 kinds of other supporting agents such as Stabilizer, Activator,
foamable antioxidant and expander. When used correctly, it allows the formation of small,
uniformly distributed cells.
Physical Properties
Item  Index
Gas Production  250cm^3/10g d(200℃)
Processing Temperatured  170-215
Expansion Degree  40-80%
Application and Dosage
BT-901 is designed to be extruded with LDPE or HDPE gas injection compounds for
processing physical foaming insulated coaxial cables. It is normally added at 1.5-2%
masterbatch concentration into a blend of 60-80% HDPE and 20-40% LDPE.
Processing Techniques
The exact temperature profile required will depend upon the screw design and construction
being made, the following extrusion temperature profile represents a good starting point:
Item  Index
Feed Zone  140 to 150 ℃
Transition Zone  170 to 180 ℃
Gas injection point  170 to 190 ℃
Metering Zone  140 to 170 ℃ (depending on insulation diameter)
Crosshead and die  130 to 190 ℃ (depending on insulation diameter)
Packing:
25kg/Plastic weaven bag with inner PE bag. It should be stored in the room under condition of
cool, dry and moisture-proof.
Note: Detailed processing recommendations will be provided upon advising the name and
type of the processing machine to have better effect.