XLPE masterbatch

LYSI-208 is a special silicone polymer which dispersed in polyethylene as solid particles, when added to the system which compatible with polyethylene, can improve the processing performance and surface properties.

LYSI-208 added to the polyethylene or compatible thermoplastic system, when the dosage at 0.1 to 1.0%, can improve the flow ability of resin. Including interface lubrication, mold release, reduces the extrusion torque and increase extrusion rate; when the dosage at 1-5%, can increase the resin surface properties. Including lubrication, lower COF, improve abrasion resistance.

Action principle

When polyethylene at the graft reaction, the viscosity of silicone cross-linked polyethylene system will dramatically increased. Thus degrades the processing performance of polymer, pipe or cable’s surface are not smooth, the extrusion speed is slow and so on. Moreover, cross-linked polyethylene in the extrusion is easily produce pre-crosslinked material when the extrusion time is longer, caused by small particles or pits on the pipe or cable’s surface.

The physical property of polymer plays an important part on extrusion processing. Silicone polymer’s surface tension is lower than commonly polyolefins. When mixed LYSI-208 processing aid with melt in the extruder, at the effect of surface tension, silicone polymers has a trend of move to the melt and attached to the metal surface of extruder, providing a lubricating layer when the plastic melt is flowing. One thing must be pointed out here: the silicone lubricant layer on the metal surface is dynamic: LYSI-208 continues to be taken away and at the same time continually replenish. The lowest dosage is to ensure the metal surface of extruder head form a continuous lubricating layer. When the process reach a dynamic equilibrium, the viscosity of extruder back pressure, torque and melt will be decreased. At this point, if we raise the speed of the extruder, let the pressure to the original value, the extruder output will increase.

Application:

For silicone cross-linked polyethylene material/cable, to improve the processing performance, smooth out the surface, reducing precipitate and gel rate, and prolong the extruder cleaning cycle. Recommended dosage: 0.2-1.0%

For PE, PP, POE, EPDM etc. maleic anhydride (acrylic acid) grafting reaction, can reduce the extruder corner things and gel rate, smooth out the surface, easier grafting reaction. Recommended dosage: 0.3-0.8%

Usage:

LYSI-208 need to mixed with the polyolefin granules, get the needed content, either pre-extrusion granulation after ingredient can also be mixed directly after injection or extrusion
For silicone cross-linking and others which has special requirements on moisture content should drying LYSI-208 at 70-75Cfirst.

Packaging, storage and transportation:

25Kg/bag

Stored in a cool dry place

Transport as non-dangerous goods