Mute water discharging pipe

Abstract

The invention discloses a mute water discharging pipe, belonging to the field of pipe materials. The mute water discharging pipe not only has a good noise reducing effect, but also has good mechanical performance, and has a three-layer structure, wherein the inner layer and the outer layer are polypropylene felts, and the middle layer is a sound-absorbing core layer; and the sound-absorbing core layer comprises the raw materials in parts by weight: 100-200 parts of polypropylene resin and 20-100 parts of noise-absorbing material, wherein the polypropylene resin is made of block copolymerized polypropylene, homopolymerized polypropylene or random copolymerized polypropylene; and the noise-absorbing material is selected from at least one of wollastonite, calcium carbonate, talcum powder, barium sulfate and silicon dioxide. The mute water discharging pipe disclosed by the invention has the advantages of excellent muting effect, superstrong chemical corrosion resistance, excellent high temperature resistance, good impact resistance, long service life and the like.

Description

technical field [0001] The invention relates to a silent drainage pipe, which belongs to the field of pipe materials. Background technique [0002] With the continuous improvement of living standards, people have higher and higher requirements for the living environment of buildings. Noise pollution has become the pollution that has the greatest impact on human life after air pollution. According to statistics, the current urban noise intensity has increased by 4% compared to 1956. As one of the main noise sources of civil buildings, drainage noise has seriously affected people's daily life, and people expect to have a safe, healthy and comfortable indoor living space. According to the provisions of the national standard GB3096-93 "Environmental Noise Standards for Urban Areas": (Taking Class 1 standards as an example, that is, applicable to areas dominated by residences and cultural and educational institutions) the noise in the bedroom at night must not exceed 45dB, and in...

AI Technical Summary

Problems solved by technology

According to the provisions of the national standard GB3096-93 "Environmental Noise Standards for Urban Areas": (Taking Class 1 standards as an example, that is, applicable to areas dominated by residences and cultural and educational institutions) the noise in the bedroom at night must not exceed 45dB, and in actual tests, At present, the noise generated by most common drainage pipes and fittings on the market is far greater than 45dB, which can easily cause neurasthenia and other non-specific diseases, etc.

[0003] At present, polyvinyl chloride (UPVC) pipes are mostly used for drainage pipes, but its fatal weakness is that it is very noisy when draining. In the face of noise, people have made a lot of efforts to develop core layer foam pipes, spiral pipes, etc. to reduce the noise. Noise when draining

Although these pipes have a certain mute effect, the effect is unsatisfactory, and the high temperature resistance and chemical corrosion resistance are poor. The noise of the core foam pipe is only about 3-5 decibels lower than that of ordinary solid wall pipes. It does not meet the requirements of noise prevention, so improvement and innovation are imperative

[0004] In order to solve the above problems, the inventor of the present invention proposed a silent drainage pipe (application number: 201010517921.7), which is a multi-layer composite made of polypropylene inner layer, middle packing layer and polypropylene material outer layer. Body, inner, middle and outer thickness ratio is 1:5:1, wherein, polypropylene inner layer and polypropylene material outer layer are made of random copolymerized polypropylene 17-87%, filler 11-80%, color masterbatch 0.5- 3%, 0.5-3% antioxidant, 0.5-2% ultraviolet absorber, 0.1-2% flame retardant (the above components are calculated by weight ratio); the middle filler layer is made of special material for polypropylene silent pipe , the special material for polypropylene silent pipe is a polymer sound-absorbing material blended with multi-component polymers and inorganic substances; the invented PP silent drain pipe effectively solves the problem of high noise, high temperature resistance and chemical corrosion resistance of current drain pipes. Poor problem, the biggest feature is the good mute effect, which is 20dB lower than ordinary plastic pipes and 10dB lower than cast iron pipes

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