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In the extrusion of polyolefin low-smoke halogen-free flame-retardant cable material or sheathed wire and cable, the phenomenon of “sharkskin” often occurs, the reason is that the lubrication system in the material formulation is not satisfactory. The common practice is to add trace amounts of fluoropolymers to the formulation, but the relatively high cost and application is quite limited.
As we all know, most of the halogen-free cable materials use metal hydrate as a flame retardant, and the proportion of additions in the formula are more than 50%, but even so there is still a flame retardant effect is not good, low oxygen index, self-extinguishing poor problem, but the appropriate amount of silicone to improve the oxygen index is obvious, and can also synergize with the metal hydrate system.
But even so, there are still poor flame retardant effect, low oxygen index, poor self-extinguishing problems, but the appropriate amount of addition of silicone, the oxygen index to improve the obvious, and can also be synergistic with the metal hydrate system.
The non-halogenated fuel retardant contains a large number of flame retardants, which makes the material with high viscosity and poor fluidity. High viscosity so that when it is extruded, the motor is difficult to drag, the flow of poor extrusion of small amount of glue, the production efficiency is very low.
However, the appropriate addition of silicone in such formulations, such problems will be greatly improved.T his is why today’s wire and cable industry has become an important customer of silicone masterbatch. Because the production is large, the demand is also certainly large. We, Xiamen Xiangxi New material, focus on your focus on the problem, to solve the problem you want to solve, in the silicone products have special problem-solving ability.
Low Smoke Halogen Free Cable Material Pain Points
The key features of low smoke halogen free flame retardant wire and cable are that all materials are halogen free and release very little smoke when burned. In order to achieve these two key elements, in the production of low-smoke halogen-free cable materials, usually add a large number of flame retardants, which also directly leads to a series of processing problems.
Processing pain points
■ A large number of aluminum hydroxide, magnesium hydroxide and other flame retardants added to the use of the system mobility is poor, the friction in the processing process leads to heat and temperature increases caused by aluminum hydroxide, magnesium hydroxide degradation.
■ Extrusion efficiency is low, even if you increase the speed of extrusion volume remains basically unchanged.
■ Inorganic flame retardants and fillers and polyolefin compatibility is poor, poor dispersion during processing, resulting in reduced mechanical properties.
■ Inorganic flame retardants are unevenly dispersed in the system, resulting in a rough surface and lack of gloss when extruded.
■ The structural polarity of flame retardants and fillers causes the melt to adhere to the die, delaying the release of the material, or the precipitation of small molecules in the formula, resulting in the accumulation of material at the mouth of the die, thus affecting the quality of the cable.
By using our product you and get the following effect:
1.Improve the flame-retardant synergism of your products;
2.Improve the wear-resistance and scratch-resistance capability of your products;
3.Improve the smoothness and make better silky tactile expression;
4.Improve the lubrication of inner and outer parts of your product ;
5.Reduce efficiently the accumulation of the extruding products;
6.Improve the dispersity of organic and inorganic fillers and liquidity capability;
7.Improve the oxygen index of flame-retardant products;
8.No viscosity and no precipitation.