What is UPVC?
UPVC, also known as PVCU, is usually called rigid polyvinyl chloride. It is an amorphous thermoplastic resin composed of vinyl chloride monomer and some additives (such as stabilizers, lubricants, fillers, etc.). ). Besides additives, it is modified by mixing with other resins, which makes it have obvious practical value. These resins include CPVC, PE, ABS, EVA, MBS and so on. UPVC melt has high viscosity and poor fluidity. Even if the injection pressure and melt temperature are increased, the fluidity will not change much. In addition, the molding temperature of resin is very close to the thermal decomposition temperature, and the molding temperature range is very narrow, so it is a difficult material to mold.
UPVC product characteristics
A. Strong corrosion resistance: Compared with ordinary cast iron pipes and galvanized pipes, pvc pipes have strong corrosion resistance, strong acid and alkali resistance, and will not rust and scale. Do not worry about the phenomenon of "red water" when using.
B, low fluid resistance: the inner wall of PVC pipe is very smooth. Its surface roughness coefficient is only 0.009, the fluid resistance is very small, and the water pressure will not be excessively reduced.
C, high mechanical strength: UPVC pipe for water supply has good water pressure resistance, impact resistance and tensile strength, and can withstand? 1 10 atmospheric pressure 1 hour without rupture.
D, healthy and non-toxic: UPVC pipes for water supply adopt a unique green and environmentally-friendly lead-free formula system, instead of the traditional compound lead salt formula system, so it will not destroy water quality and affect human health.
E, light weight, convenient installation and construction: the density of PVC pipe is one fifth of that of ordinary cast iron, so it is convenient to carry. It adopts special adhesive or elastic sealing element to socket, and the installation and construction are simple and quick.
Performance of UPVC
stability
Adding tin stabilizer in UPVC modification production is not only environmentally friendly and harmless, but also enhances its thermal stability and dimensional stability.
Weather capacity
Refers to the ability of plastics to withstand all kinds of weather. These factors include visible light and ultraviolet light, humidity, temperature, atmospheric chlorination and chemicals encountered during product use. The most important weatherability includes fastness, pulverization resistance and durability of physical properties. The weather resistance of modified UPVC is equivalent to that of ASA, and it has better physical and chemical properties. As we all know, among all polymer materials, ASA is famous for its excellent weatherability, and UPVC can completely replace ASA in weatherability. In China, after years of research and development of new Han Yong plastic materials, UPVC materials with QUV test over 2500 hours (i.e., weather resistance over 10 years) were successfully developed, and the material invention patent was obtained (patent number: 2007 1065438+).
fire resistance
UPVC itself has good flame retardancy. Generally, the oxygen index of UPVC is above 27, and the oxygen index of specially modified UPVC can reach or even exceed 42, which is incomparable to other general plastics.
Diversity of performances
Adding additives with different properties to UPVC will show different properties. This makes UPVC present diversity. Therefore, the utility model is more extensive. Make it one of the largest plastic products in the world.
What is the difference between pvc and upvc?
PVC is polyvinyl chloride, which is a plastic product made of 43% oil and 57% salt. Compared with other kinds of plastic products, PVC uses raw materials more effectively and reduces fuel consumption. At the same time, the energy consumption of PVC manufacturing industry is also very low. And in the later period of use of PVC products, it can be recycled and converted into other new products or burned to obtain energy. ?
Stabilizers will be added in the production process of PVC, but there are two kinds of stabilizers: non-toxic and toxic. Only by adding toxic stabilizers such as lead salt will there be hidden dangers. However, PVC products are mixed, and some small enterprises use lead salt as stabilizer, so it is difficult to meet the relevant hygiene standards. When consumers choose PVC materials, it is best to go to the formal building materials market with guaranteed reputation and quality, and ask suppliers to issue test reports. Consumers should pay attention to check the relevant certificates and signs, and obtain the Hygiene License for Drinking Water Hygiene and Safety Products before the products are safe.
Upvc is an amorphous thermoplastic resin polymerized from vinyl chloride monomer and some additives (such as stabilizers, lubricants, fillers, etc.). ). Besides additives, it is modified by mixing with other resins, which makes it have obvious practical value. These resins include CPVC, PE, ABS, EVA, MBS and so on. UPVC melt has high viscosity and poor fluidity. Even if the injection pressure and melt temperature are increased, the fluidity will not change much. In addition, the molding temperature of resin is very close to the thermal decomposition temperature, and the molding temperature range is very narrow, so it is a difficult material to mold.
What kind of glue is used for upvc material?
Giant Arrow G-90 1A is upvc pipe glue (special glue for pvc pipes), which effectively solves the problems of unsealing, weak adhesion, slow speed, high cost and environmental protection in the connection and use of upvc pipes.
Clean up oil stains, dirt and other dirt on the surface of the adherend, and keep it clean and dry; Directly and evenly coat the adhesive solution on the surfaces of the two adherends, and apply glue on one side or both sides, immediately (after drying, it is not allowed to apply glue), apply a little pressure to make the bonded surfaces more dense, and position for 3-5 minutes, and reach a certain strength in about 2 hours and the maximum strength in 24 hours;
As we all know, China is now the second largest economy in the world. The rise of China has led to the rapid rise of the domestic real estate industry, and high-rise buildings can be seen everywhere. The building materials market promoted by the rise of the real estate industry is really hot, and most traditional building materials are mainly iron products. With the development of science and technology, there are a lot of materials in society. Among them, upvc tube is very popular.