What is the material of PP air duct
Nowadays, many people use PP air duct when they carry out interior decoration. Many people have very high regulations on PP air duct, including materials, prices and other fields. Although the small PP air duct is not worth mentioning, it has a particularly important effect in home decoration. People are very concerned about PP ventilation duct materials, so what materials are used for PP ventilation duct in the sales market now?
In fact, the pipe is made of polypropylene, which is mainly used in the hot water supply system software in the room of housing construction. Compared with the pipe fittings made of other materials, it has very good advantages:
PP风管的关键材料是聚丙稀，这是由丙烯聚合物而制取的这种热塑性树脂。无毒性、无臭、无气味的奶白色高结晶体的高聚物，相对密度只能4. 95--"4. 91g/cm3，别的材料的净重都不如它轻。值得一提的是，它的有机化学可靠性非常好，除能被浓硫酸、浓硝酸腐蚀外，对其他各种各样化学药品都稳定，但低含量的脂肪烃、芳香烃和氯化烃等能使聚丙稀变软和溶胀，一起它的有机化学可靠性随晶粒大小的提升还逐步提高，因此聚丙稀合适制做各种各样化工管道和零配件，耐腐蚀实际效果优良。
The key material of PP air duct is polypropylene, which is a thermoplastic resin made of propylene polymer. The non-toxic, odorless and odorless milk white high knot crystal polymer has a relative density of only 4.95 -- "4.91g/cm3, and the net weight of other materials is not as light as it. It is worth mentioning that its organic chemical reliability is very good. In addition to being corroded by concentrated sulfuric acid and concentrated nitric acid, it is stable for all kinds of other chemicals, but the low content of aliphatic hydrocarbon, aromatic hydrocarbon and chlorinated hydrocarbon can make polypropylene soften and swell. Together, its organic chemical reliability increases gradually with the increase of grain size, so polypropylene is suitable for making all kinds of chemicals Engineering pipeline and spare parts, good corrosion resistance.
Properties of PP air duct material:
1. No rust: PP air pipe gate valve can bear the pH within a large temperature range, and the range is 1-13 with high concentration of acid and alkali.
2. Wear resistance and no scaling: the inner cavity of PP air pipe gate valve and pipe is well proportioned and smooth, with small flow friction resistance and no scaling.
3. Reduce vibration and noise: PP air pipe gate valve has high-quality sound insulation characteristics, which can significantly reduce vibration and noise caused by liquid fluidity.
4. Cold crack prevention: the high ductility of PP air duct raw materials makes the cross section of pipe fittings and pipes rise together with the frost heaving liquid, which is not easy to crack.
5. Anti condensation water, less heat damage: PP air duct raw material is poor thermal conductor, which can reduce the problem of condensation water and reduce the heat loss.
6. Installation and operation: PP ventilation duct is light, easy to install and operate, and has weldability.
I. PP air duct is used for gas conveyor and all over the pipeline system software. The ventilation air duct can be classified according to the cross-section appearance and materials. According to the cross-section appearance, the ventilation air duct can be divided into ring ventilation air duct, rectangular frame ventilation air duct, flat round ventilation air duct, etc. at least, the height width ratio of the ring ventilation air duct with small friction resistance is large and the manufacture is complicated. Therefore, the rectangular frame is used The ventilation duct is dominant. According to the material, the ventilation air duct can be divided into metal material ventilation air duct, composite air duct and polymer material ventilation air duct. At least, metal ventilation duct is a kind of ventilation duct made of various metal composite materials, including galvanized steel plate and stainless steel plate.
II. PP ventilation air duct is composed of various inorganic raw materials, which can be divided into various types according to their composition. However, light concrete, porous structure, raw materials with high heat transfer coefficient, which are not rusty, can bear the pH value in a large temperature range, and the corrosion of acid and alkali with high concentration in the range of 1-13, which are resistant to wear and scale, and the inner cavity of the pipe is even and smooth, flowing Sexual friction resistance is small and not easy to scale.
III. reduce vibration and noise: PP air duct has good sound insulation characteristics, which can significantly reduce the vibration and noise caused by liquid fluidity, prevent cold cracking. The high ductility of raw materials enables the cross section of pipe fittings and pipes to swell together with the frost heaving liquid, which is not easy to crack. It can prevent condensation water and less heat damage. The raw materials are poor thermal conductors, which can reduce the problem of condensation water Reduce heat loss.
IV. it is light, easy to install and operate, and has weldability and long service life. The service life of the system software reaches 60 years under the required application standard.
V. key classification of PP air duct: it is generally classified according to the purpose: the clean management system to the ventilation duct, the household central air conditioning ventilation duct, the industrial production air supply and exhaust system ventilation duct, the environmental protection management system smoke suction and exhaust duct, the mine gas drainage pipe, the mine tape coated air duct, etc.