Cold-resisting PP (Polypropylene) corrugated pipe and preparation method thereof

Abstract

The invention discloses a cold-resisting PP (Polypropylene) corrugated pipe. The cold-resisting PP corrugated pipe is prepared from the following raw materials: 70 to 90 parts of PP-B (Polypropylene-Block copolymer), 8 to 12 parts of POE (Polyolefin Elastomer), 4 to 5 parts of LLDPE (Linear Low Density Polyethylene), 2 to 8 parts of PE (Polyethylene), 2 to 8 parts of HDPE (High-density Polyethylene), 0.8 to 1.2 parts of EVA (Ethylene Vinyl Acetate) and 1 to 5 parts of modified color mater batch. A preparation method of the cold-resisting PP corrugated pipe specifically comprises the followingsteps: adding the raw materials into a mixing machine according to the weight percent and mixing at the temperature of 110 to 140 DEG C; automatically cooling after reaching the requirements; after sieving through a vibration sieve, automatically feeding; extruding through a double-screw extruder under high temperature and high pressure; molding through a molding machine and carrying out fixed-length cutting through a cutting machine; conveying into a flaring machine and carrying out flaring; checking and storing, wherein the temperature of a barrel body of the extruder is 150 to 185 DEG C andthe temperature of an opening die is not greater than 210 DEG C. The PP corrugated pipe prepared by the invention has the characteristics of excellent cold resistance and good toughness, and is especially suitable for a winter low-temperature condition of a cold region.

Description

technical field [0001] The invention relates to the technical field of polymer materials, more specifically, it relates to a cold-resistant PP corrugated pipe and a preparation method thereof. Background technique [0002] Plastic corrugated pipes were first developed in the 1950s, and have developed by leaps and bounds in the last 20 years. The plastic corrugated pipe adopts a special "annular groove" special-shaped section in the structural design. This kind of pipe is novel in design and reasonable in structure, breaking through the traditional "plate" structure of ordinary pipes, so that the pipe has sufficient compression resistance and impact resistance. Strength, but also has good flexibility. Plastic bellows can be widely used in drainage and ventilation pipes; interior decoration wire casings; automotive wire casings; prestressed anchor cable casings; air conditioner drains, etc. [0003] As one of the plastic corrugated pipes, PP (polypropylene) pipe has a higher...

AI Technical Summary

Problems solved by technology

However, the fly in the ointment is that the existing PP pipes have poor cold resistance, poor impact resistance at low temperature or even room temperature, easy to be brittle, and easy to age. Suitable, especially for areas with long cold seasons such as the north where use is limited

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