Formula of modified polypropylene corrugated pipe for electric power

Abstract

The invention relates to a formula of modified polypropylene corrugated pipe for electric power. The formula comprises the following ingredients: polypropylene, talc powder, a compatilizer, organic rectorite, an impact modifier, a fire retardant, a lubricant, an antioxidant, an ultraviolet light absorber and toner. The formula provided by the invention can meet the performance demands of the modified polypropylene corrugated pipe for electric power, and the product prepared by the formula has the advantages of high ring stiffness, good heat resistance, excellent fire resistance, good low-temperature impact performance, good forming stability and strong cost performance, etc.

Description

technical field [0001] The invention relates to an industrial pipe, in particular to a formula for a modified polypropylene corrugated pipe for electric power. Background technique [0002] At present, the plastic corrugated pipes for electric power are mainly PVC pipes and PP pipes. The two products are respectively made of SG-5 polyvinyl chloride and block copolymerized polypropylene (PP-B). Due to the influence of the material formula, the obtained All products have certain performance defects. [0003] Disadvantages of PVC corrugated pipe formula: 1. PVC resin is unstable, and dehydrochlorination phenomenon is prone to occur in production, which will cause great harm to the environment and human body. At the same time, in order to ensure that dehydrochlorination does not occur, a certain amount of heat must be added during production. Stabilizers, and most of the current PVC heat stabilizers are lead-based or cadmium-based, which increases the impact on the environment...

AI Technical Summary

Problems solved by technology

[0002] At present, the plastic corrugated pipes for electric power are mainly PVC pipes and PP pipes. The two products are respectively made of SG-5 polyvinyl chloride and block copolymerized polypropylene (PP-B). Due to the influence of the material formula, the obtained All products have certain performance defects

[0003] Disadvantages of PVC corrugated pipe formula: 1. PVC resin is unstable, and dehydrochlorination phenomenon is prone to occur in production, which will cause great harm to the environment and human body. At the same time, in order to ensure that dehydrochlorination does not occur, a certain amount of heat must be added during production. Stabilizers, and most of the current PVC heat stabilizers are lead-based or cadmium-based, which increases the impact on the environment; 2. PVC materials have poor low-temperature performance and poor toughness. 3. The heat resistance of PVC material is poor, and the Vicat is generally about 80; 4. The density of PVC material is relatively high, and the pure PVC tree index is generally 1.45, but the manufacturer considers the cost issue. A large amount of calcium carbonate will be added as much as possible, so the density of PVC power pipes on the market is generally above 1.8, resulting in heavy pipes, which is not conducive to construction; 5. PVC pipes are affected by materials and cannot be effectively welded, resulting in pipes During construction, it can only be installed in the socket mode, which seriously affects the sealing of the pipeline system and is prone to water seepage

[0004] The PP corrugated pipe is made of pure PP-B raw material, so it has the following disadvantages: 1. The bending modulus of pure raw material is low, generally 1000-1200MPa, and the tensile strength is about 23MPa, which causes the ring stiffness and tensile force of the pipe to be biased. Low; 2. The shrinkage rate of pure raw materials is relatively large, and the molding stability of the product is poor, and the shrinkage rate is generally about 3‰; 3. The price of pure raw materials is relatively high, generally more than 20% higher than that of modified materials, especially when it is made into pipes , because of its low strength, when using pure raw materials, the thickness of the pipe must be increased, otherwise the required strength cannot be achieved, thus increasing the cost of the pipe; 4. The Vicat temperature of pure raw materials is slightly lower, generally higher than that of modified materials 5. The thermal conductivity of pure raw materials is low, generally 0.23 to 0.25; it is not conducive to the improvement of production speed and virtually increases the production cost; 6. Due to the use of pure raw materials, the pipes produced have no flame retardancy properties, cannot be applied in some fields