PVC cable compound is a kind of particle prepared by mixing, kneading and extruding PVC based resin, adding
Stabilizer, dioctyl phthalate, diisodecyl phthalate, dioctyl terephthalate, trioctyl trimellitate and other plasticizers,
Calcium Carbonate and other inorganic fillers, additives and lubricants.
PVC cable material has high withstand voltage and insulation resistance, but its dielectric constant and dielectric loss are large. Therefore, it is generally used as the insulation layer of low voltage and medium high voltage cables.
PVC plastic is also widely used as the protective material of wires and cables due to its flame retardant, oil resistant, corona resistant, chemical resistant and good water resistance. Heat resistant, cold resistant, oil resistant, flame-retardant, super soft, non-toxic and environment-friendly flame retardant PVC cable compounds can be manufactured by adding special performance additives or modifiers to meet the needs of special wire and cable products.
The quality of PVC cable material is determined by the brightness of the cable material, and the main influencing factors are as follows:
Plasticizer: The straighter and longer the molecular chain, the brighter. For example, 1030 is brighter than TOTM, and DOA is brighter than DOP.
Stabilizer: It also has an effect. Generally, those with fast gel formation are brighter.
Process: of course, the high extrusion temperature is brighter than the low temperature, and the good mixing effect is brighter than the poor mixing effect of black powder (such as 50L, etc.): do not exceed 0.8PHR, otherwise, be careful to granulate, and it will not be bright.
PVC polymerization degree: the lower, the brighter, S-60 is brighter than S-70.
Calcium carbonate: the finer the particle size, the brighter the surface is. Light calcium is brighter than heavy calcium, ultra-fine light calcium is brighter than ordinary light calcium, such as CCR501 is brighter than white cherry blossom. Needless to say, the truth of other inorganic functional fillers such as antimony trioxide or aluminum hydroxide is the same. The less the fillers are, of course, brighter than the more fillers. So these things have less energy, and can use liquid instead of powder.
The brightness of PVC cable material determines the quality of products. Therefore, many cable material manufacturers start from improving the brightness of cable material to make their best efforts to produce high-quality products.
