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Top 10 applications of PVC pipes-2
2022 / 05 / 11
2. PVC Pipe for Waste Handling and Control PVC pipes are most frequently used in waste management and control. They are used for waste management in various places, like commercial buildings, industrial areas, modern societal infrastructure, and so on. PVC pipes are installed in wastewater transportation, swears, drains, vents connected to different buildings and equipment. PVC pipes are installed in toilets, sinks, and liquid handling devices that are used in drains, vents, and waste (DWV) management. PVC pipes are useful in DWV applications because they have synthetic properties such as resistance to corrosion, rust, and microbiological layer growth, as well as improved plasticity and bend strength. Therefore, they have an upper hand over the other metal piping and can benefit from inventing, managing, and waste control. 3. PVC Pipes for Rainwater Management PVC pipes are at the forefront in facilitating the rainwater harvesting system. The PVC pipes provide an ideal solution for the maintenance and distribution of the rainwater. The rainwater is carried from the rooftop through the PVC pipes down into a storage or harvesting system. The fitting material that is used to connect the channel has special sockets so that they can be fitted easily and avoid leakage. The PVC pipes provide an advantage over the iron pipes that rust easily. They also come in various sizes and can be installed easily based on the need for the harvesting system. The high-quality PVC pipes ensure that there is no crack or bend in the system and have a UV stabilizer. 4. PVC Pipes for Agriculture Agriculture is one of the largest and important sectors and is incomplete without PVC pipes. PVC pipes are used for all important functions of agriculture from bore-well to water irrigation, sprinklers and spraying of pesticides and fertilizers. PVC agricultural pipes are
Top 10 applications of PVC pipes-3
2022 / 05 / 11
7. PVC Pipe for Chemical Handling The product used for handling chemicals and industrial substances varies depending on the type of chemical, its compatibility with the chemical, and its tolerance. The PVC pipes are efficient in handling particular types of chemicals, as opposed to metal pipes. The long polymeric chains of PVC offers a high material resistance against degradation, chemical attack, and corrosion. The chlorine content in PVC makes it fire resistant and does not allow the flames to spread. Therefore, PVC pipe and plumbing are frequently applied for use in handling chemicals as well as their transfer, production, delivery, and processes. The PVC pipes can be used to transport chemicals like alcohols, organic acids, anhydride acids, hydrocarbons, halogens, oxidising acids, salts, inorganic acids, alkalis, and ammonia. 8. PVC Pipes for Fittings The latest PVC pipes and fittings have proven to be useful in almost all areas because they offer a wide range of pipes, valves, and fittings. There are a huge number of connections that can be made using the PVC pipes as they are available in various forms like straight pipes, branch pipes, T-shaped pipes, and bracketed pipes. Thus, PVC pipes provide a multipurpose system without any cracks that are easy to install. PVC pipe fittings can be used to make high-performance piping systems. They can help to connect the new units with the older ones using the latest materials to renovate the pipe network at the same time, helping to maintain complete system integrity. 9. PVC Pipe for Building Infrastructure and Structural Material PVC pipes have been increasingly used in infrastructure and building materials over the past few years. The PVC pipes are an inexpensive and better substitute for wood and other types of building materials. The PVC pipes` topmost use for building infrastructure is in the e
2022 / 05 / 07
Chemical blowing agents are divided into inorganic blowing agents and organic blowing agents. Organic foaming agents mainly include the following categories: 1. Azo compound 2. Sulfonyl hydrazide compounds 3. Nitroso compounds Inorganic foaming agents mainly include the following categories: Carbonate: An inorganic foaming agent, mainly calcium carbonate, magnesium carbonate, and sodium bicarbonate. Among them, sodium bicarbonate is a white powder with a specific gravity of 2.16. The decomposition temperature is about 100-140℃, and part of CO2 will be released, and all CO2 will be lost when it reaches 270℃. Soluble in water but not in alcohol. Water glass: Sodium silicate, when mixed with glass powder and heated to about 850℃, it reacts with the glass and emits a large amount of gas. At the same time, it can strengthen the compressive and tensile strength of the material. It is mainly used as a foaming agent for preparing foam glass. . Silicon carbide: The main foaming agent used in the current industrial production of foam glass, which emits a large amount of gas during sintering at 800-900°C. Carbon black: It is also a very easy-to-use foaming agent. It emits CO2 when heated and has a good foaming effect, but the disadvantage is that the price is higher. Commonly used physical blowing agents are low-boiling alkanes and fluorocarbons. The physical foaming agent is a compound physical foaming agent, which not only has the advantages of high foaming ratio, good foam stability, low bleeding, etc., but also has a certain modification effect on magnesite cement and reduces product halogenation. Probability of frost. Physical foaming agents have been widely used in the production of foamed magnesite products such as fireproof boards and lightweight partition boards, and in some products (magnesite fir
PVC lubricant product categories
2022 / 05 / 07
The lubricant is to neutralize the mold release of the product during plastic processing, and prevent defects caused by adhesion in the machine or mold. Generally added to the molding compound or coated on the surface of the mold cavity. Commonly used lubricants include fatty acids and their salts, and long-chain aliphatic hydrocarbons. According to the different mechanism of lubricant action, it can be divided into external lubricant and internal lubricant. (1) External lubricant: This lubricant has poor compatibility with the resin used for molding, so it is commonly used in molding processing machinery or molds. A lubricating layer is formed between it and the resin to facilitate resin flow and product release. , Such as paraffin. (2) Internal lubricant: This type of lubricant has good compatibility with resin, and is often mixed into resin to reduce the melt viscosity of the resin and improve its fluidity. Such as butyl stearate, lead stearate and so on. Stearates are both good lubricants and effective stabilizers.
Main performance of commonly used PVC lubricants
2022 / 05 / 07
(1) Calcium stearate: White powder, melting point 148-155℃, non-toxic, excellent lubricity and processability, no vulcanization pollution, combined with basic lead salt and lead soap, can increase the gelation speed, the dosage is generally 0.1-0.4PHR. (2) Oxidized polyethylene wax White or light yellow powder or particles. Although oxidized polyethylene wax contains a small amount of polar groups, it is still incompatible with PVC, but it has high lubrication efficiency, which can improve the lubricity between polymer and metal, increase extrusion efficiency, and improve The dispersibility of the colorant gives the product good transparency and gloss. The dosage is 0.1-0.5PHR. (3) Stearic acid White or light yellow particles, melting point 70-71°C. Slowly volatilize at 90-100℃, used as external lubricant in hard PVC processing, the dosage is generally 0.2-0.5PHR, and it has the effect of preventing chromatographic scaling, but if the dosage is too large, it will bloom. (4) Glyceryl stearate Powder, melting point 85-87℃, has excellent heat resistance and fluidity, can increase the amount of filler, and can promote plasticization. Used together with waxes can improve the thermal stability of PVC-U. The general dosage is 0.2-0.6PHR. In practice, people have found that when two or more lubricants are used in combination, they have different effects than when used alone. In the formula of profiled materials, most of them adopt the compounding method (5) Paraffin It has a melting point of 57-63°C and does not contain polar groups. It is a typical external lubricant. Because of its low melting point, easy evaporation and low melt viscosity, it can only provide lubrication in a narrow range. It is suitable for single and twin screw extruders. The general dosage is 0.1-0.8PHR. This product has poor transparency and whi
Common mistakes in the use of flame retardants
2022 / 05 / 07
Misunderstanding 1: The larger the amount of flame retardant, the better the flame retardant effect. The limiting oxygen index (LOI) and UL-94 test results show that the flame retardant performance of the material is related to the flame retardant dosage. With the increase of flame retardant content, the flame retardant effect first increases and then decreases. Too much flame retardant can have a significant impact on the mechanical properties of the material. Misunderstanding 2: The higher the flame retardant rating, the better. In general, people always want their materials to have a higher flame rating. However, in fact, various flame retardant test methods have limitations, and their conclusions are relative. For example, UL94 V-0 is better than V-2, however, some electrical products require arc ignitable materials and V-2 is better than V-0. Since V-2 plastic does not form conductivity and coke under the action of electricity, the possibility of fire is greatly reduced, but V-0 plastic is the complete opposite. Novista Group supplies DBDPE, BDDP, FR245, TTBP,SR130 to global market.
Microencapsulated red phosphorus flame retardant
2022 / 05 / 07
Among halogen-free flame retardants, red phosphorus flame retardants are good flame retardants with low addition amount, high flame retardant efficiency and smoke. It has the advantages of low toxicity, low toxicity and widespread use. When red phosphorus is used in combination with inorganic flame retardants such as aluminum hydroxide and effervescent graphite, halogen-free composite flame retardants, such as phosphorus/magnesium, phosphorus/aluminum and phosphorus/graphite, can be prepared, resulting in a large amount of flame retardants. fuel. Can be reduced. Improve the processability and physical and mechanical properties of plastic products. However, ordinary red phosphorus is easily oxidized, easily absorbs moisture in the air, easily causes dust explosion, is difficult to transport, and has poor solubility in polymer materials, so its application range is limited. To remedy this shortcoming, microencapsulated red phosphorus can be prepared using a microencapsulation process. Microencapsulated red phosphorus not only overcomes the inherent shortcomings of red phosphorus, but also has the advantages of high efficiency, low smoke, and no toxic gas. Its dispersibility, physical and mechanical properties, thermal stability and flame retardancy are improved and enhanced. Novista Group supplies equivalent of FP-2100JC, FP-2200S, FP-2500S, Exolit OP1230, OP930, OP1312, OP1314 to global market.
Some common PA (nylon) flame retardants
2022 / 05 / 07
Halogen/antimony or other flame retardant synergistic systems, halogen-free flame retardant systems based on red phosphorus or melamine. From a quantitative point of view, the halogen/antimony synergistic system is still the most widely used PA flame retardant system. In some parts of Europe and Asia, efforts are underway to find alternatives to halogenated flame retardants. However, these alternative systems are generally considered to have problems such as poor thermal stability and hygroscopicity. For red phosphorus, there are storage issues due to its flammability. The following are the main flame retardants used in nylon and their advantages and disadvantages. 1. Halogen-containing flame retardant system: A brominated styrene polymer with excellent thermal stability that is important and widely used abroad is being melt-mixed with PA. The process has good fluidity. In addition, the flame retardant PA prepared with it also has excellent electrical, physical and mechanical properties. The limitations of this flame retardant are its low photostability and incomplete compatibility with PA. It is also more expensive than decabromodiphenyl ether, which is widely used in China. Another flame retardant that has been used in PA for many years is flammable. This is a chlorine-containing flame retardant with high efficiency and electrical properties, but limited thermal stability. Only suitable for low processing temperature nylon flame retardant systems. Currently, the widely used flame retardant in China is decabromodiphenyl ether. Due to its high bromine content, PA has high flame retardant efficiency and is an economical flame retardant. However, since it is a filled flame retardant, it has a large detrimental effect on the flowability of processing and the physical and mechanical properties of the product. It also has poor thermal and light stabi
2022 / 04 / 29
Successful processing of flexible vinyl compounds with extrusion technology is dependent upon a wide range of variables. For optimum PVC extrusion processing, exact machine conditions will need to be determined by the processor. The following information will aid the processor in attaining the best possible results. PROCESSING GUIDE Since flexible vinyl comes in a wide range of hardness and density, the setting of the extruder temperatures will vary greatly. If you have prior experience with a similar flexible vinyl then those temperatures would be a great starting point. If not, refer to the compound's Technical Data Sheet for the recommended stock or melt temperature for vinyl extrusion which will normally be shown as a range. Take the midpoint of the range and set all barrel, head and die temperatures ten degrees less than the midpoint temperature. Once material is flowing through the extruder, it may be necessary to adjust each temperature zone depending on the aesthetics and output of the material. The most critical zones will be the rear barrel temperature of the feed zone and the temperature of the die. (To be continued...)
2022 / 04 / 29
The feed zone temperature controls the compound sticking to the barrel wall, otherwise known as the bite. Too much bite will lead to overheating of the compound and too little bite will lead to poor output. The die temperature will also influence output and will have an effect on the dimensions of the extrudate. A cold die will restrict flow where as a too-hot die will affect dimensions. When optimum temperatures are reached, it is known as the temperature profile; temperature profiles vary greatly and include: Straight Profile
MBS Impact Modifiers in Polycarbonate
2022 / 04 / 24
MBS Impact Modifiers in Polycarbonate Polycarbonate (PC) is known for its transparency, its excellent resistance to impact and its ability to withstand high temperatures during the lifespan of the final article. However, PC's low chemical resistance (gasoline) is an issue for automotive applications. The injection molding of high viscosity grades is another limitation, especially when high impact resistance is required. Moreover inherent performances of PC, such as impact, are also seriously compromised when colored pigments, fillers or flame retardant additives are used in the compound. Recycled PC's are a cost-effective solution for compounders. However, the recycling steps reduce PC's mechanical performance, making the use of impact modifiers necessary in recycled PC, in order to reach the desired level of performance. Benefits of MBS Impact Modifiers in Polycarbonate Benefits Description Exceptional Low-temperature Impact Performance
impact modification additives for PVC resins
2022 / 04 / 24
Depending on the end-use, different types of PVC resins require different impact modification additives to achieve the right performance goals. Flexible PVC Rigid PVC Durable strength and flexibility Better low-temperature properties Greater property retention after heat aging Better flexibility after chemical exposure Improved flow and fusion characteristics of the compound Enhanced filler compatibility Lower processing temperature Higher throughput Higher filler loading Lower stabilizer content
2022 / 04 / 24
The elastomeric and rubbery nature of impact modifiers absorbs or dissipates the energy of impact. Impact modifiers can be incorporated through polymerization in the reactor, or may also be incorporated as additives in the compounding step. The two mechanisms by which impact modifiers work are discussed below. Craze Propagation The principle is to disperse impact modifiers into the brittle matrix, a dampening phase capable to absorb energy and stop craze propagation.
Advantages and disadvantages of commonly used flame retardants
2022 / 04 / 23
In recent years, with the increase in the output of plastic products and the improvement of safety standards, flame retardant materials are more widely used. Generally speaking, flame retardant materials can be divided into organic flame retardant materials and inorganic flame retardant materials. The organic flame retardant has good flame retardant effect and the addition amount is relatively small. However, organic flame retardants have the drawbacks of generating large amounts of smoke and releasing toxic gases during combustion. Inorganic flame retardants have the advantages of non-toxic, smoke-free, non-volatile and cheap, but the amount of addition is relatively large. 1. Halogen flame retardant Halogen flame retardants are not only large in output, but also widely used. The material added with the flame retardant can release hydrogen halide and obtain free radicals during the combustion process, thereby preventing the transfer of the combustion chain, and then generating free radicals with low activity to slow down the combustion. Halogen flame retardants are generally used in thermoplastic materials and thermosetting materials. They not only have good compatibility with polymer materials, but also are easy to use. Therefore, they are welcomed by the market and are widely used in automobile, packaging, textile and other industries. 2. Phosphorus flame retardant Inorganic phosphorus flame retardants mainly include phosphates, red phosphorus, etc. Red phosphorus is widely used. Red phosphorus is a good flame retardant, but in practical applications, red phosphorus flame reta
2022 / 04 / 23
Flame retardants are chemicals added to materials to interfere with combustion. This disturbance is usually to achieve some desired refractory properties - slow ignition, reduce flame spread, etc. Widely used in plastic, wood and textile fire protection. Phosphorus flame retardants (including organic phosphorus and inorganic phosphorus) can carbonize the combustion material to achieve a flame retardant effect. This flame retardant effect mainly plays a role in the solid phase. In order to impart basic flame retardant properties to plastics, inorganic fillers (aluminum hydroxide, magnesium hydroxide) have also been used, which can release water molecules by thermal decomposition. Novista Group supplies equivalent of FP-2100JC, FP-2200S, FP-2500S, Exolit OP1230, OP930, OP1312, OP1314 to global market.
Application and advantages of brominated flame retardants
2022 / 04 / 23
Bromine is used as a flame retardant, in addition to mercury removal, air purification and other fields. With the wide application of polymer materials such as plastics in household environments, public places and vehicles, flame retardants have increasingly become a must-added fire retardant. Currently, flame retardants are mainly used in four fields: transportation, electronic and electrical equipment, furniture, and buildings and construction materials. There are more than 200 kinds of flame retardant family products, which can be divided into bromine-based, phosphorus-based, nitrogen-based, silicon-based and inorganic flame retardants according to different elements. There is also an inevitability to this diversity, as the materials and products that are to be fire resistant vary widely in properties, composition and even application. Some flame retardants may be very suitable for some specific applications, but not in other areas. That is, there is no one flame retardant, and different solutions must be selected according to different applications. Material engineers will select suitable flame retardants according to the structure and properties of materials. For example, 80% to 90% of printed circuit boards use brominated flame retardants. Brominated flame retardants are very efficient and can capture free radicals in the combustion chain reaction, terminating or slowing down the chain reaction, thus playing a role in fl
The extrusion process of PVC door and window profile-1
2022 / 04 / 22
1. Production process The production process of PVC door and window profile mainly includes single screw extrusion process and twin screw extrusion process. The raw materials used in the two processes are the mixed powder prepared in the previous process according to a certain formula. At present, the extrusion line of hard PVC door and window profile mostly uses conical screw. (1) Single screw extrusion The single screw extrusion process is especially suitable for the production of small batch and small size profile. The process flow is as follows: Mixed powder →
The extrusion process of PVC door and window profile-2
2022 / 04 / 22
(1) Temperature control After PVC mixed powder enters the extruder, it should be compacted, transported, melted, homogenized and extruded at a lower temperature. In order to obtain high quality and high output profiles, the temperature of each section needs to be adjusted repeatedly and controlled accurately, so that the materials are always in the melting temperature and decomposition temperature range in the extrusion process. In order to set the temperature correctly, it is necessary to fully consider and guide the relevant factors of material forming temperature. Factors affecting material processing temperature 1) Formula and raw material quality have the greatest influence on the processing temperature, and the plasticization temperature of the mixture composed of different raw materials is different. After the formula is determined, the processing temperature is basically determined, which only needs to be adjusted in a small range according to the product quality; fo
How Does A Plastic Extrusion Machine Work-1
2022 / 04 / 22
As a manufacturer of piping, tubing, insulation, or any other plastic composite product, you likely already know what an extrusion machine is, but may be wondering if it's right for your high-volume manufacturing process. Plastic Extruding Machine What is Plastic Extrusion Machinery What is Plastic Extrusion Machinery? To put it simply, plastic extrusion is a "high-volume manufacturing process" in which raw plastic is melted and formed into a continuous profile. Plastic extrusion machinery is useful for speeding up workflow and volume. It's also great for ensuring consistency through your products, which are made exactly to your specifications every time.
How Does A Plastic Extrusion Machine Work-2
2022 / 04 / 22
· Temperature Control To ensure that the final materials won`t degrade or become weakened, it`s essential to maintain a consistent temperature inside the extruder`s barrel. Overheating the materials should be avoided to reduce imperfections, so typically the barrel is heated gradually from rear to front. The temperature is also maintained using a series of fan and water cooling systems before your product is extruded into a die mold. Die Types A die mold is useful in plastic extruders because they can create one continuous extrusion that can then be cut into parts. Unlike with injection molding, which injects the material into individual molds, die molds will allow your product to be continuously made at whatever size (or sizes) you need. Depending on the type of product being manufactured, there are various types of dies that can be implemented into your process.
2022 / 04 / 16
PVC products in the production process, polymer, additives, processing equipment is the three main material conditions. There are many kinds and quantities of auxiliaries used in thermoplastics. In addition to the auxiliaries needed for curing in the processing of thermosetting plastics, the demand for other auxiliaries is relatively small. The dosage of the additive is small, usually a few percent or even a few thousandths of the weight of the polymer.However, such as plasticizer, reinforcing agent, filler, softener, flame retardant and other large dosage, up to 10 to dozens of parts. Although the amount of additives is small, but the effect is significant, even can make some of the performance defects or processing is very difficult and almost lost practical value of the polymer into valuable materials. Because of the use of auxiliaries, many fine chemical products can be used more effectively.Therefore, additi
PVC Roof Tile Technology In Producing
2022 / 04 / 16
What is PVC roof tile? PVC tile is made of polyvinyl chloride resin (PVC) as the main raw material, supplemented by UV anti-ultraviolet agent UV531 and other chemical raw materials, through scientific proportioning and advanced technology. PVC tile, also known as plastic steel tile, is a replacement product of color steel tile. By using multi-layer co-extrusion technology, the anti-aging layer is coated on the surface of the product, which improves the weather resistance and color persistence, and adds a wear-resistant layer on the bottom. It can also save steel and reduce costs. What are the characteristics of PVC roof tile? It is acid resistant, alkali resistant, corrosion resistant and has a service life of 30 years. Anti-impact, anti-stretching, fire protection, low noise, anti-ultraviolet. Excellent waterproof performance, Good flame retardancy, heat insulation and heat preservation. It is a new environmental protection material with bright and colorful color, no fading, no asbestos composition. It is easy to install, light in weight and low in transportation cost. Light transmittance performance is better than the same type of building materials. The materials used have light transmittance performance, which can increase indoor lighting and save energy consumption. What a
2022 / 04 / 16
PVC processing modifier series products are the company will be advanced polymer synthesis technology and tsinghua university department of bai cheng chemical engineering laboratory of nano technology, the combination of research and development of a new type of modified PVC processing AIDS, it makes full use of the nanometer materials is greater than surface area, the characteristics of the surface free energy is big, to overcome the traditional PVC processing aid in the defect of plasticizing performance at lower temperature variation. In the processing process, the strong surface tension of nanomaterials is transformed into the internal friction with PVC molecules, because this internal friction increases with the decrease of temperature, which improves the problem that the plasticizability of traditional ACR significantly deteriorates with the decrease of temperature. Compared with traditional ACR, series products have the following characteristics: 1) Static stability is better than traditional processing auxiliaries. 2) When the temperature changes, the shear force changes accordingly, which can make the plasticization degree of PVC basically unchanged. 3) can greatly improve the processing performance of PVC, improve the surface finish of products. ⒉1 Test method
Heat stabilizer market ready for product changes-1
2022 / 04 / 16
PVC (polyvinylchloride) is a versatile polymer, either rigid or plasticized to yield a flexible plastic. It requires, however, a heat stabilizer. PVC is employed in many applications ranging from flooring, cable, and film made from plasticized vinyl to pipe, profiles, and sheets processed from rigid PVC. However, PVC can only be processed in the presence of heat-stabilizing additives to avoid changes in the chemical structure caused by elevated temperatures and mechanical stresses. Over the last decades lead (Pb) stabilizers were used to stabilize most rigid PVC worldwide except in North America, where tin (Sn) stabilizers dominated. Both systems show similar price/performance ratios; technically, they are incompatible with each other, cannot be recycled together, and thus are used exclusively in selective markets. Now a trend toward stabilizers based on calcium (Ca) and zinc (Zn) as well as organic compounds is emerging. Use of these additives is mainly driven by voluntary commitments, such as the Vinyl 2010 initiative by the European PVC industry, started by key PVC industry players in 2000. It is a 15-year-program to meet the challenges of sustainable development and continuous environmental improvement throughout the European PVC sector. Stabilizer systems based on calcium/zinc (CaZn) deliver some advantages over lead and tin stabilizer
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Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.