Environmental-protection oxygen barrier antibacterial polypropylene-random (PP-R) pipe

Abstract

The invention discloses an environmental-protection oxygen barrier antibacterial polypropylene-random (PP-R) pipe. The environmental-protection oxygen barrier antibacterial PP-R pipe comprises a PP-R outer layer, a PP-R oxygen barrier intermediate layer and a PP-R antibacterial inner layer, wherein a high-performance oxygen barrier agent selected in the PP-R oxygen barrier intermediate layer is polyamide and copolymers thereof or polyving akohol and copolymers thereof. The environmental-protection oxygen barrier antibacterial PP-R pipe has a reasonable production formula and low production cost, keeps inherent physical and mechanical properties by adding the oxygen barrier intermediate layer and performing one-time extrusion molding, has high oxygen barrier performance and can prolong the service life of system equipment. The environmental-protection oxygen barrier antibacterial PP-R pipe has an antibacterial rate up to 90 percent on escherichia coli and staphylococcus aureus and has high physical and mechanical properties.

Description

technical field [0001] The invention belongs to the technical field of building materials and relates to the technical field of polypropylene composite materials, in particular to an oxygen-resistance and antibacterial PP-R pipe. Background technique [0002] Existing ordinary PP-R pipes or PP-R antibacterial pipes are manufactured using the most traditional raw materials. On the one hand, they cannot completely inhibit the growth of microorganisms in tap water, especially Escherichia coli and Staphylococcus aureus. After long-term use, the inner surface will be damaged. It is easy to form bacterial groups, pollute tap water, cause water quality to decline, and affect people's drinking water health. [0003] On the other hand, in the currently used plastic pipes, the oxygen in the atmosphere can permeate through the plastic pipe wall and dissolve in the medium it carries, which increases the oxygen content in the medium and accelerates the corrosion of the metal in the syste...

AI Technical Summary

Problems solved by technology

[0002] Existing ordinary PP-R pipes or PP-R antibacterial pipes are manufactured with the most traditional raw materials. On the one hand, they cannot completely inhibit the growth of microorganisms in tap water, especially Escherichia coli and Staphylococcus aureus. After long-term use, the inner surface will be damaged. It is easy to form bacterial groups, pollute tap water, cause water quality to decline, and affect people's drinking water health

[0003] On the other hand, in the currently used plastic pipes, the oxygen in the atmosphere can permeate through the plastic pipe wall and dissolve in the medium it carries, which increases the oxygen content in the medium and accelerates the corrosion of the metal in the system equipment. Affect its service life, thereby affecting the safe operation of equipment

In order to improve the oxygen barrier performance of the pipeline, oxygen barrier materials are usually added to the pipeline. The commonly used oxygen barrier materials such as EVOH (ethylene-vinyl alcohol copolymer) have a good effect of blocking oxygen, water vapor and carbon dioxide, but EVOH needs to be combined with PE-RT is compounded, EVOH is sensitive to temperature, easy to decompose when overheated, and easy to adhere to the metal surface. In the production process, the temperature accuracy is high, and the extrusion process is high. Therefore, the production of pipes containing EVOH oxygen barrier materials High cost, not conducive to the popularization of oxygen barrier pipes

[0004] In addition, the existing PP-R pipe has an excessively large linear expansion coefficient during installation, construction and use. When the actual temperature difference is large, the PP-R pipe will have problems such as distortion and poor rigidity due to excessive expansion or contraction. In addition, the low-temperature impact resistance of PP-R pipes also needs to be further improved

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