Toughened antibacterial polypropylene pressure pipe

Abstract

The present invention relates to a toughened antibacterial polypropylene pressure pipe, which are composed of an outer toughening layer and an inner antibacterial layer. The toughening layer is an outer layer of the pipe, and the antibacterial layer is an inner layer of the pipe. The formula of the toughening layer comprises the following ingredients (by weight): 80%-90% of a special material for a polypropylene randon copolymer pipeline, 2%-4% of color masterbatch, 0.05%-0.2% of a beta-nucleating agent for polypropylene, 5%-10% of a compatibilizer and 0.05-0.1% of a heat stabilizer. The above two layers are respectively extruded and pelleted in a twin-screw extruder; and pelleted raw materials are co-extruded by a single screw extruder, cooled, drawn and cut so as to prepare the finished product. The invention has the advantages as follows: the outer layer of the pipe has excellent impact resistance and hydrostatic resistance, and the inner antibacterial layer ensures that a conveying medium will not be polluted by the pipe itself and can have antibiotic and bacteriostatic effects; and in comparison with a common PPR pipe with the same wall thickness, the pressure pipe of the invention has high compression strength and good impact resistance, is green, corrosion-resistant, and has an efficient broad-spectrum antibacterial function.

Description

technical field [0001] The invention relates to the technical field of polypropylene pipes, in particular to a toughened and antibacterial polypropylene pressure pipe. Background technique [0002] Since 1999, the replacement of metal pipes by plastic pipes has developed rapidly, and the mainstream plastic pipes of PP-R have begun to completely replace traditional metal pipes. With the application of PP-R pipes for more than ten years, the shortcomings of PP-R pipes have also begun to be exposed. PP-R family series pipes have poor low temperature resistance. Due to the limitation of molecular characteristics of PP-R materials, their embrittlement temperature is generally 0°C. Once the room temperature is lower than their embrittlement temperature, the material is prone to embrittlement. At present, more than 90% of the pipe leakage phenomenon that often occurs on the construction site is caused by cracks or micro-cracks caused by the impact of PP-R at low temperature. In th...

AI Technical Summary

Problems solved by technology

However, due to the inherent characteristics of PP-R material molecules, its effect is not obvious, and the brittleness of PP-R pipes causes pipe ruptures every year.

At present, elastomer blending modification is mainly used in impact modification. Although this method can improve the impact resistance of the pipeline, it is at the expense of the pressure resistance of the pipeline, which is not worth the candle for pressure pipelines.

[0003] In addition, although PPR has superior hygienic performance, it does not have antibacterial and antibacterial functions, and the pipeline is prone to breed bacteria in the process of conveying cold and hot water

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