Thermal-Stable Insulating CPVC for HVAC Systems

Product Description

Company Profile

Weifang Phoenix New Material Co., Ltd

 

       Weifang Phoenix New Material Co., Ltd is a high-tech chemical enterprise integrating research and development,

production, sales and technical services. Headquartered in Weifang, Shandong Province. Its production facilities are

ocated in Weifang Binhai Chemical Industry Park, a state-approved chemical industry park.
 

      Our mission is to be the leading sustainable "one-stop shop" chemical solutions company, providing customers

with innovative, science-led, differentiated products and solutions. To this end, we provide a safe and healthy working

environment for our employees and comply with all local, national and international regulations.
 

Product Parameters

PROJECT	Test Standards	HT-112	HT-120
Appearance	Q/DHXJ 008	30±1	36±1
Density g/cm³	GB/T 1033.1 (Eqv ISO 1183)	1.5	2.0
Tensile strength MPa	GB/T 1040.2 (Eqv ISO 527)	0.30	0.30
Tensile elastic modulus MPa	GB/T 1040.2 (Eqv ISO 527)	40	40
Izod notched impact strength kJ/m²	GB/T 1843 (Eqv ISO 180)	65	60
Vicat softening temperature ºC	GB/T 1633 (Eqv ISO 306)	8.0	8.0
Oven test	GB/T 9349 (Eqv ISO 305)	700	1000

 

 

 

As a new type of pipeline, CPVC pipe has excellent corrosion resistance. In recent years, it has been widely used in steel, metallurgy, petroleum, chemical industry, fertilizer, dye, pharmaceutical, electric power, environmental protection and sewage treatment industries. It is an ideal substitute for metal anti-corrosion materials. Due to the increase in the chlorine content in the material, the irregularity of the CPVC molecules in the structure increases (the crystallinity decreases and the polarity of the molecular chain increases), which increases its thermal deformation temperature. The operating temperature of CPVC products can reach up to 93-100ºC, which is 30-40ºC higher than PVC. At the same time, it improves the chemical resistance and corrosion resistance of PVC, and can resist chemical corrosion from strong acids, strong alkalis, salts, fatty acid salts, oxidants and halogens. In addition, the tensile strength and flexural strength of CPVC are also improved compared with PVC. Compared with other polymer materials, CPVC has excellent aging resistance, corrosion resistance and high flame retardancy. The chlorine content of CPVC raw materials is 63-74%, which is higher than PVC (chlorine content 56-59%). The processing viscosity is at least twice as high, and the density of CPVC (between 1450-1650Kg/m) is greater than that of PVC. The above data determine that CPVC is much more difficult to process than PVC. The CPVC piping system consists of: CPVC pipes, CPVC 90° elbows, CPVC 45° elbows, CPVC straight-throughs, CPVC slip-on flanges, CPVC flange blind plates, CPVC equal-diameter tees, CPVC reducing tees, CPVC concentric reducers, CPVC eccentric reducers, CPVC manual butterfly valves, CPVC manual ball valves, CPVC electric butterfly valves, CPVC check valves, CPVC manual diaphragm valves, PTFE rubber compensators (KXTF-B type), nitrile rubber coated PTFE gaskets, stainless steel (SUS304) bolts, channel steel brackets, equilateral angle steel continuous brackets, U-shaped pipe clamps, etc.

Chlorinated polyvinyl chloride (PVC) resin, also known as perchloroethylene resin, is a new type of polymer elastic material between rubber and plastic obtained by chlorination of polyvinyl chloride (PVC). It is an important modified product of PVC. It has a wide range of applications in plastics, building materials, electrical, medical, agricultural, rubber, paint, pigment, shipbuilding, papermaking, textile, packaging, coating and steel, and has broad prospects for development and utilization. This article briefly introduces the properties, production methods, uses and development prospects of CPVC (chlorinated polyvinyl chloride). Although CPVC is a polymer made from PVC as a matrix and shares some properties with PVC, it is also a polymer with its own characteristics, which is particularly important for its processing. For example, the melting temperature of CPVC polymer ranges from 400°F to a maximum of 450°F. Chrome-plated or stainless steel die heads are required for extrusion processing. The extrusion die head must be well streamlined to ensure long-term processing and operation. Flat die heads cannot obtain satisfactory extrusion operation time. In order to well control the extrusion size of pipes and profiles, it is best to use vacuum shaping technology. Extrusion equipment should be equipped with a screw drive of at least 40 horsepower. There are several screw designs suitable for extrusion processing of various formulated compounds.

 

Chlorinated polyvinyl chloride (CPVC) is a product of further chlorination modification of polyvinyl chloride (PVC), and its chlorine content is generally 65% to 72% (volume fraction). This material not only retains many excellent properties of PVC, but also has significant improvements in corrosion resistance, heat resistance, solubility, flame retardancy and mechanical strength, so it is regarded as a new type of engineering plastic with excellent performance.

CPVC is white or light yellow loose particles or powder, odorless and tasteless, and not easy to burn. It has excellent high temperature resistance and corrosion resistance, and its price is relatively low compared with other thermoplastic engineering plastics, so its application prospects are very broad. In the construction field, CPVC is widely used in building materials such as hot and cold water transportation and industrial pipeline water supply systems, cable pipes, profiled doors and windows; in the chemical industry, it is widely used in the manufacture of corrosion-resistant paints, adhesives, synthetic fibers and chemical equipment. In addition, CPVC is also widely used in aviation, electronic appliances, petroleum and other fields.

From the perspective of preparation methods, the production process of CPVC mainly includes solvent method, suspension method and gas-solid phase method. The solvent method was the earliest method used to prepare CPVC, but it is gradually being eliminated because of the high toxicity, difficult recycling and environmental pollution caused by the use of organic solvents such as chloroform or carbon tetrachloride. The suspension method and the aqueous phase method are currently commonly used methods at home and abroad. They have good heat resistance and mechanical properties and low production costs. The gas-solid phase method is a more environmentally friendly production method, but it is still in the development stage and needs to solve problems such as uneven chlorination and difficulty in heat extraction from the reaction.

In general, chlorinated polyvinyl chloride (CPVC) is a new type of engineering plastic with excellent properties and is widely used in many fields. With the acceleration of infrastructure construction and industrialization in emerging markets, the demand for CPVC products will continue to grow, creating huge growth potential for the industry.

1. Pipes: CPVC is mainly used to produce plates, bars, and pipes to transport hot water and corrosive media. It can maintain sufficient strength when the temperature does not exceed 100 ºC, and can be used for a long time under high internal pressure. The weight of CPVC is 1/6 of brass and 1/5 of steel, and it has extremely low thermal conductivity. Therefore, pipes made of CPVC are light in weight, have good thermal insulation performance, and do not require insulation.

2. CPVC pipes can be used as hot sewage pipes in factories, electroplating solution pipes, hot chemical reagent delivery pipes, and wet chlorine delivery pipes in chlor-alkali plants.

3. Injection molding: CPVC resin can produce pipe fittings for water supply pipes, filter materials, dehydrators, etc., and can also produce electrical and electronic parts. Such as wire troughs, protective layers of conductors, electric switches, protective covers of fuses, insulating materials for cables, etc.

4. Rolled sheets: can be used to manufacture chemical equipment that is resistant to chemicals and corrosion, such as reactors, valves, electrolytic cells, etc.

5. Composite materials: CPVC composite materials composed of CPVC and certain inorganic or organic fibers have good impact resistance and better heat resistance than other resin composite materials. They can be made into plates, pipes, corrugated plates, profiles, etc.

6. CPVC can be used to modify chloroprene fibers: the washing and drying temperature of domestic chloroprene fibers must not exceed 60 ºC. Adding 30% CPVC when spinning chloroprene can greatly improve the heat resistance of the product, and the shrinkage rate is reduced from the original 50% to less than 10%.

7. Foaming materials: The heat resistance of CPVC foaming materials is better than that of PVC foaming materials. The shrinkage rate at high temperature is quite small, and it can be used as insulation materials for hot water pipes and steam pipes. CPVC with a chlorine content greater than 60% has a very good solvent retention. CPVC can be placed in a solvent that can generate gas when heated to foam, and a uniform, microporous foaming gas can be obtained. Solvents such as hydrocarbons, ethers, and aldehydes with a boiling point of 50-160°C can be used as foaming agents.

8. Others, CPVC can be blended with thermoplastic or thermosetting plastics to significantly improve the physical and mechanical properties of these materials, such as improving the heat resistance of the product.

9. Foreign countries have also prepared CPVC with higher impact resistance and better transparency through improved production processes. This transparent material can be used in automobiles, CDs, and audio-visual products, with good economic benefits.