PVC cable compound formula design points and production process

PVC cable material formula design points (1) for the general sheath grade PVC cable material. Plasticizer dosage is 0-60PHR, stabilizer 6-8PHR, lubricant 1.5-2PHR, filler 10-20PHR: plasticizer with poor plasticization efficiency, the amount should be more; when the amount of filler is large. Plasticizers, lubricants can be used in larger amounts; when using non-active fillers. The amount of plasticizers and lubricants should be larger; sheathing grade cable materials generally need to be added with cold plasticizers around 5PHR;

(2) For the general insulation grade cable material, the plasticizer dosage is 40-50 PHR. Stabilizer 6-8 PHR. Lubricant l ~ 1.5PHR. Filler l0PHR around; plasticizers, lubricants reference jacket grade cable material;

(3) Plasticizers such as DBP with high volatility cannot be used for cable materials;

(4) In addition to high temperature resistant cable materials, high temperature plasticizers should be used. Stabilizer dosage should also be increased. Add 0.3 to 0.5 PHR of antioxidant;

(5) Cable material with high insulation performance requirements. Calcined clays should be used as fillers (plasticizing efficiency of polymeric polymeric plasticizers is poor. The amount of plasticizer should be increased as appropriate when formulating formulations;

(7) When formulating a transparent cable formulation. Should be used with a good compatibility with the resin additives. Direct use of organic tin and other transparent stabilizers, and strictly control the amount of lubricant added;

(8) When designing flame-retardant cable formulations. Should use a composite flame retardant system is appropriate;

(9) When formulating a high degree of polymerization cable formulation. Should use a composite processing modifier to improve its processing performance;

(10) When formulating non-migratory cable compounds, polyester or high polymer plasticizers should be selected;

(11) When the compound stabilizer is used, its amount is slightly more than that of the three salt stabilizers;

(12) Under the condition that the cable material is processed and used normally. Use as little stabilizer as possible. Prevent excessive amounts of it from producing a "filler effect."

Cable material production process (1) Single screw extruder production process flow:

Raw materials --- ingredients --- high-speed kneading machine --- single-screw extruder --- air-cooled --- screening magnetic separation --- measurement --- packaging.

(2) single screw two-stage extruder production process:

Raw materials --- ingredients --- high-speed kneading machine --- single-screw double-stage granulator --- cooling and drying --- screening magnetic separation --- measurement --- packaging.

(3) Twin-screw extruder production process:

Raw materials --- ingredients --- high-speed kneader --- twin-screw extruder --- air-cooled --- screening magnetic separation --- measurement --- packaging.

(4) Rolling granulation production process flow:

Raw materials----Advanced--High-speed kneader--Intermixer--Two-roll mill--Cooling sink--Drying--Cutter--Selecting magnetic separation-- - Metering - Packaging.