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2022 / 04 / 09
The PROBLEM - Outdated Iron Pipe Systems Corroding Water Quality· Water delivery and sewage treatment are critical to public health and the environment. Corrosion, leaks and breaks in old-technology pipe materials are degrading our drinking water and wastewater systems.· The burden of corrosion-prone pipe materials is not limited to the cost of repairing and replacing failed pipes. It includes the cost of the loss of treated water leaking from the system.· While certain pipe manufacturers continue to explore [solutions" to corrosion – because their materials are affected by it - PVC remains indisputably resistant to it.· PVC pipe is a proven and extremely durable alternative to traditional corrosion-prone pipe materials. Unlike metal piping, PVC won`t rust or corrode over time because it does not react with air and water.· PVC pipes have a proven service history of over 50 years in Australia. A review by Engineering News Record in 1999 found use of PVC for water and sewer pipe to be top 20 engineering advancements of the 20th century and has a proven performance record of over 50 years in Australia, while overseas studies show the life expectancy of PVC pipes to be over 110 years.· PVC-O pipe, the most efficient and sustainable pipe for delivery of water has over 20 years successful use in Australia.· Less energy is required to manufacture PVC than traditional pipe materials. PVC pipes lighter weight makes it easier, safer and less costly to handle, transport and install. Most PVC pipe can be handled manually, reducing the need for expensive installation equipment.· PVC pipes ultra-smooth surface means that less energy is needed to pump water through it.· Significant savings over the life cycle of a pipe network are achieved with PVC, since increasing amounts of energy are consumed
No. 1 Reason for Burst Water Mains
2022 / 04 / 09
Fact – Burst water mains cause traffic chaos and waste precious water resources. Fact – PVC water mains pipes can have a lifespan of up to 150 years, delivering corrosion free, clean quality water for a century and a half. PVC pipe is a product of modern technology, offering reliable and durable service to a variety of users including contractors, engineers, operators, industries, utilities and irrigation districts. A number of performance advantages means PVC Pipes now replaces many traditional materials Corrosion, leaks and breaks in old-technology pipe materials are degrading our water delivery and sewage treatment systems, which are critical to public health and the environment. The Solution: PVC Pipe While certain pipe manufacturers continue to explore [solutions" to corrosion – because their materials are affected by it – PVC remains indisputably resistant to it. PVC pipe is a proven and extremely durable alternative to traditional corrosion prone pipe materials. Recognised by state, national and international agencies and standards organisations, it has been a benchmark since it was introduced in the sewer, water and drainage markets. "An American Water Works Association Research Foundation study confirms the life expectancy of PVC pipe to be in excess of 110 years." PVC`s cost effectiveness and sustainability are important qualities that water authorities and local governments should be considering – and ratepayers should be demanding. So Why Aren`t We Using PVC More Widely? Since pipe is the largest component of water utility`s assets, it`s critical that steps be taken to ensure its long-term sustainability, which will help utilities hold the line on costs. PVC is the most cost-effective and durable piping material available today, and pro
The reason why CPE can be used as an impact modifier
2022 / 04 / 02
As an excellent impact modifier, chlorinated polyethylene thermoplastic resin is used in many aspects, which can greatly improve the impact resistance of rigid PVC impact modifiers and improve processing fluidity. At the same time, chlorinated polyethylene also has good chemical resistance, low temperature performance, high filling performance, excellent weather resistance and compatibility. At present , the most widely used and most economical impact modifier in the PVC pipe profile industry is chlorinated polyethylene resin, which can improve the impact resistance and aging performance, especially for large-diameter pressure-resistant liquid pipelines, in order to improve Chlorinated polyethylene is mostly used for pressure bearing capacity and increased service life. In addition, the resin acts as an impact modifier. Compatibilizers are used in flame-retardant ABS , SAN , HDPE and PP to improve the impact resistance and flame retardancy of impact modifiers.
Uses and applications of CPE chlorinated polyethylene
2022 / 04 / 02
The appearance of chlorinated polyethylene is white, odorless, and has good weather resistance, ozone resistance, aging resistance and chemical resistance. Due to its good toughness, it has good compatibility with other polymer materials and has a high decomposition temperature. . According to different structures and uses , chlorinated polyethylene can be divided into resin-based chlorinated polyethylene (CPE) and elastomer-based chlorinated polyethylene (CM) . In the rubber industry, CPE can be used as a high-performance, high-quality special rubber, and can also be combined with ethylene propylene rubber ( EPR ), butyl rubber ( IIR ), nitrile rubber ( NBR ), chlorosulfonated polyethylene ( CSM ), etc. Other rubbers are blended for use. Main application: Due to the increasing domestic demand for high-performance flame-retardant rubber, especially the development of the wire and cable industry and auto parts manufacturing industry, the consumer demand for rubber-based CPE has been driven . Main applications: wire and cable (cables for coal mines, wires specified in UL and VDE standards), hydraulic hoses, automotive hoses, tapes, rubber sheets, PVC profile pipe modification, magnetic materials, ABS modification, etc.
Ways to improve the quality of PVC foaming regulator
2022 / 04 / 02
PVC foaming regulator can help polyvinyl chloride foamed products to provide good regulation effect. By adding high molecular weight polymer, it can help PVC quickly plasticize, and it can also increase the strength of its melt to achieve uniform foaming. How to improve the quality ? 1. There are many ways to improve the quality of PVC foaming regulators. The main factor is to increase the melt strength of PVC , so the reasonable method is to increase the additives to increase the melt strength and reduce the processing temperature; 2. Polyvinyl chloride belongs to amorphous data, and the melt strength decreases with the increase of melt temperature; on the contrary, the melt strength decreases with the decrease of melt temperature, but the cooling effect is limited to auxiliary effects. ACR type treatment agent has the function of improving the melt strength, among which PVC foaming regulator is effective. As the content of foaming regulator increases, the melt strength increases; 3. Generally, only the screw has sufficient dispersing ability, and increasing the PVC foaming regulator is more effective in improving the melt strength. The above is an introduction to the methods to improve the quality of PVC foaming adjustments. Generally speaking, we have to learn to increase the strength of the melt and reduce its processing temperature during the construction process. After understanding this
Analysis of three kinds of flame retardants
2022 / 04 / 02
1) Organic halogen flame retardant Organic halogenated flame retardants refer to organic flame retardants with halogen as the main flame retardant components. Due to their high flame retardant efficiency, low consumption and small impact on the properties of materials, they have been widely used in the flame retardant market since the 1960s. Brominated flame retardants are the representative of organic halogenated flame retardants. Among all the sales of organic halogenated flame retardants, the sales volume of brominated flame retardants has been ranked first. In particular, about 70% of the flame retardants used in electronic and electrical products are brominated flame retardants. The representative products of brominated flame retardants are tetrabromobisphenol A and decabromodiphenylethane, which account for about 50% of the total production of brominated flame retardants. However, the disadvantages of brominated flame retardants in environmental protection and safety are also increasingly apparent. Because most of the flame retardant mechanisms of brominated flame retardants are gas phase flame retardants, a lot of smoke, corrosive gases and toxic gases will be produced when they are used as flame retardants, Some brominated flame retardants will release hydrogen halide gas and dioxins (polybrominated dibenzo-dioxins and polybrominated dibenzofuran) which are harmful to human body and environment during the combustion process. Most of the brominated flame retar
Common polypropylene(PP)flame retardant systems and application characteristics
2022 / 04 / 02
As a common modified material, flame retardant polypropylene is mainly used in small household appliances, electronic appliances, automobiles and other fields. It has the advantages of high cost performance, large room for performance adjustment, and easy molding. At present, there are many researches and applications on flame retardant polypropylene, but the common flame retardant systems on the market are nothing more than the following four categories: (1) PP resin + bromine + antimony Novista@B044+Novista@ATO (2) PP resin + expanded carbon flame retardant system (APP system) Novista@PNPO (3) PP resin + new type of expanded carbon flame retardant system (non-APP system) Novista@PNPO-G1 (4) PP resin + phosphorus-nitrogen-bromine high-efficiency flame retardant (V2 system)
What is halogen free? Are halogen-free flame retardants completely halogen-free?
2022 / 04 / 02
1. What is the concept of halogen-free? Halogens are listed in Group VIIA of the periodic table and belong to non-metallic elements, including five elements: Fluorine, Chlorine, Bromine, Iodine, and Astatine. Halogen often refers to the four elements of fluorine, chlorine, bromine and iodine, which usually exist in the form of organic compounds in products, especially in polymer materials. 2. The origin of the halogen-free concept. Halogen Free or Non-Halogen, according to the requirements of regulations IEC 61249-2-21: bromine and chlorine content are less than 900ppm respectively, and the sum of bromine and chlorine content is less than 1500ppm, it is halogen-free. Therefore, halogen-free is not really halogen-free, but the halogen content in the product is below a certain value. 3. Why put forward the concept of halogen-free? Halogens are often used as flame retardants in electronic components and materials, product casings, plastics, etc. Halogen flame retardants are almost difficult to recycle and release harmful substances during combustion and heating, threatening human health, the environment and future generations. Therefore, corresponding halogen restriction requirements have been formed in various countr
Strength & Durability of PVC Pipe
2022 / 04 / 01
PVC Pipes are strong and durable despite their relatively low weight. This makes PVC Pipes suitable for all types of long-term applications including domestic water, sewerage, stormwater, and deep underground piping systems. It stays strong through a range of temperatures resulting in fewer burst pipes and other maintenance issues. PVC-O PIPES ARE TOUGHER THAN THEIR DUCTILE IRON COMPETITORS IN EXTREME FIELD TESTING Triple Field Installation Testing PVC (Polyvinyl Chloride) Pipes and DI (Ductile Iron) Pipes both offer the benefits of relatively high tensile strengths, burst pressures, and crushing loads. However, our closer look proves that the real strength in the pipes market are PVC-O Pipes. Under normal circumstances PVC Pipes possess high resistance to impact damage when compared to pipes made from clay, concrete, and most other conventional materials. Even though PVC Pipes do exhibit a reduction in impact strength at very low temperatures the impact strength remains more than adequate, usually exceeding that of alternate pipe materials. The long-term tensile strength is twice that of iron, steel, or other thermoplastic pipe material.
Corrosion Resistance of PVC Pipes
2022 / 04 / 01
The major finding of a recent study is that PVC Pipe has the lowest overall failure rate when compared to cast iron, ductile iron, concrete, steel, and asbestos cement pipes. The report concluded that corrosion was a major cause of water main breaks.Escalating deterioration of water and sewer systems due to corrosion, leaks, and breaks in old-technology pipe materials threaten our ability to provide safe drinking water and essential sanitation services both today and in future generations.Unlike metal piping, PVC Pipes won't rust or corrode over time because it does not react with air and water the way metal does which results in a significantly longer lifetime of the pipe.Consequently, PVC Pipe is more cost-effective in applications where soil is aggressive. PVC Pipe can be expected to outlast alternative pipes without the need for protective coatings or liners.
Mechanisms of brominated flame retardant
2022 / 03 / 26
Due to the low bond energy of the C-Br bond, most bromine-based flame retardants will decompose at 200-300℃. This temperature range is also the decomposition temperature range of polypropylene. Therefore, when polypropylene is thermally decomposed, bromine-based flame retardants will decompose. The fuel also begins to decompose, and can capture the free radicals generated by the degradation reaction of polypropylene, thereby delaying or terminating the chain reaction of combustion. Brominated flame retardants will release HBr at the same time when they are decomposed. This is a kind of flame-retardant gas. This gas has a high density and can cover the surface of the material to block the surface combustible gas and inhibit the burning of the material. This kind of flame retardant can also be used in combination with other compounds (such as antimony trioxide), which can significantly improve the flame retardant effect through synergistic effects. Brominated flame retardants play an important role in the flame retardant application of polypropylene. The main products are decabromodiphenyl ethane, tetrabromobisphenol A-bis(2,3-dibromopropyl ether), and decabromodiphenyl ether, Tetrabromobisphenol A, brominated polystyrene, hexabromocyclododecane, etc. Novista Group supplies DBDPE, BDDP, FR245, TTBP,
Principles and advantages of flame retardant polypropylene (PP)
2022 / 03 / 26
Phosphorus-nitrogen flame retardant is also called intumescent flame retardant. When the polymer containing this kind of flame retardant is heated, a uniform carbon foam layer can be formed on the surface, which can insulate heat, oxygen and smoke. It can prevent the phenomenon of droplets, so it has good flame retardant properties. Intumescent flame retardant systems generally consist of three parts: acid source (dehydrating agent), carbon source (carburizing agent) and gas source (nitrogen source, foaming source). The carbon source in the IFR undergoes an esterification reaction under the action of an acid source, and the product is an ester compound; after that, a dehydration and crosslinking reaction occurs, and the ester compound forms a carbonized product. At the same time, the gas generated by the decomposition of the gas source acts on the carbonized product. Make it form a closed, porous, and fluffy carbon layer with a foamed structure. The carbon layer is essentially carbon microcrystals, an amorphous carbon structure, which cannot be burned, and can block the heat conduction between the polypropylene flame retardant material and the heat source It has the effect of increasing the thermal degradation temperature of the flame-retardant propylene. In addition, the closed foamed carbon layer can prevent the diffusion of gas, that is, prevent the flammable gas generated by thermal decomposition from diffusing, and at the same time block the flow of external oxygen to the surface of the uncracked flame-retardant polypropylene material. Oxygen and heat, the burning flame-retardant polypropylene material will self-ext
Application of synergist in IFR (intumescent flame retardant)
2022 / 03 / 26
In order to further improve the flame retardant efficiency of IFR, some flame retardant synergists are usually added to the extrusion of ordinary intumescent flame retardants to meet the material's requirements for high flame retardant performance and reduce the amount of flame retardant added. From the perspective of scientific research and current research, zeolite, traditional metal compounds, metal chelates, natural clay, and rare earth oxides are usually used as synergistic flame retardant additives for IFR systems to have better flame retardant enhancement effects. In addition, nanoparticles such as montmorillonite, hydrotalcite, single-walled carbon nanotubes or multi-walled carbon nanotubes are also added to the polypropylene matrix to work together with IFR to improve its flame retardant effect. In short, adding an appropriate amount of synergistic additives, together with IFR to synergize flame retardant polypropylene, can significantly improve the flame retardant properties of polypropylene, inhibit the heat release of polypropylene during the combustion process, slow down the heat release rate, and reduce the combustion time The resulting mass loss caused by thermal weight loss improves the thermal stability of polypropylene and increases the amount of carbon remaining after combustion. Novista Group supplies APP, MCA, aluminium hydroxide, magnesium hydroxide to global market.
Innovations and Advances in PVC Technology-1
2022 / 03 / 26
Advancements in Polyvinyl Chloride (PVC) technology are improving for use in pipe, construction applications, wires and cabling, medical tubing, flooring, fabrics and other consumer items. As a thermoplastic resin, manufactured from industrial salts and carbon, PVC is also less dependent on oil or gas and considered a more natural resource. PVC Pipe PVC pipe is approximately 75% less expensive in use than PE pipe, (polyethylene HDPE). New advancements include PVC-O, oriented PVC and PVC-M, modified PVC. PVC-O has been successfully used in Australia for almost 20 years. This pipe is produced by re-aligning the molecules in PVC with Biaxial orientation. The pipe produced is considerably stronger, allowing the wall thickness to be reduced close to 50% while maintaining the same pressure strength. This pipe offers increased hydraulic capacity and requires less energy use in production than PVC-U and other materials. PVC-O is lighter in weight making it easier to transport and work with. The material retains its strength in a wide range of temperatures and is highly impact resistant. Fusible PVC is providing enormous benefits to trenchless technology. This pipe is extremely useful for replacing broken or damaged cast iron pipe. Cost savings are increased with a continuous pipe requiring no seal rings. Fusible PVC is being used in pressure and non-pressure lines and wastewater applications. Modifying polymers added to PVC produce PVC-M pipe. PVC-M shows superior strength and resistance to cracks or scratches. The pipe can also be made with a thinner wall, reducing the material cost, while still offering the same durability.
Innovations and Advances in PVC Technology-2
2022 / 03 / 26
PVC Compound In the PVC market there`re some companies who developed a renewable modifier for PVC that increases the strength and resists fungi and biodegradation. PHA (polyhydroxyalkanoate), a biobased copolymer, offers improved processing with all PVC compounds. While the PHA polymer is biodegradable, when used in a non-biodegradable polymer, the biodegradation process is not increased. The modifier does not migrate and provides easier handling and processing. This formulation allows for using a single product in formulation to eliminate multiple modifiers and processing steps. The PHA modifier gives higher flexibility and impact resistance to flexible and semi-rigid PVC. A next-generation PHA is being optimized for rigid PVC in outdoor use. The modifier should combat the poor light stability and oxidation of ABS (Acrylonitrile Butadiene Styrene) and MBS (Methaacrylate Butadiene Styrene) while providing more strength than ASA (Acrylonitrile Styrene Acrylate) and CPE (Chlorinated Polyethylene) modifiers. Be sure to visit NOVISTA on NOVISTAGROUP.COM or Facebook/twitter to share your views on this technology. You can also follow us on Twitter and ask any questions to our dedicated editorial team using the comments section below.
2022 / 03 / 26
PVC Pipe is a product of modern technology that offers reliable and durable service to a variety of users including contractors, engineers, operators, industries, utilities, and irrigation districts. A number of performance advantages means PVC Pipes now replace many traditional materials.LightweightPVC Pipes offer a tremendous weight advantage over alternative piping materials. The comparatively low weight of PVC Piping means that installers are less likely to get injured, and while it may take a team of workers or mechanical hoists to carry a large section of metal pipe, PVC Pipe is so light that a single person could easily move a long piece. This means fewer installers are required and those hired can get the piping installed comparatively faster than iron or steel.Less weight also means cheaper transport because the majority of transport companies charge by weight. This also enables larger payloads (more pipes) to be loaded.FlexibilityPVC Pipe's resistance to fracture is an extremely important performance advantage. While PVC Pipes are made from rigid PVC compound, the PVC Pipe itself has the ability to yield under loading without fracturing. PVC Pipes can successfully be used where the surface will be subject to external loading such as road traffic*.The modulus of elasticity of PVC Pipes is a major advantage for buried applications, particularly where soil movement or vibration is anticipated. In pressure applications, PVC's modulus of elasticity also reduces the magnitude of pressure surges i.e. water hammer. PVC-O Pipes has higher resistance to water hammer than all other pressure pipe types.Watertight JointsA major requirement for all piping applications is joint tightness. PVC Pipes are available with deep insertion, push-together gasketed or solvent cement joints. Gasketed PVC Pipe Joints have co
2022 / 03 / 26
Coefficient of FrictionWhen piping systems are designed one of the main concerns is flow rate and pressure. PVC Pipes provide smoother wall surfaces that reduce fluid friction and resistance to flow.This hydraulic smoothness inhibits slime build-up in sewers and virtually eliminates tuberculation and encrustation in water distribution mains. The end results are significantly lower maintenance costs, more efficient initial pipeline design, and superior performance over the lifetime of the PVC pipe.Safe MaterialPVC pipe is a non-toxic and safe material that has been used for more than half a century. It is also the world's most researched and tested plastic.Longer LengthsPVC pipe is typically supplied in lengths of 6m, however can be supplied in other lengths as required. This reduces the number of joints required as compared with other pipe products.Fewer joints allow for faster and more efficient installation, less hydraulic friction, and fewer opportunities for leakage.Flame ResistancePVC Pipe is difficult to ignite and will not continue burning in the absence of an external ignition source. The spontaneous ignition temperature is 450°C.Design VersatilityThe physical properties of PVC Pipes allow designers and specifiers a high degree of freedom when designing new products and developing solutions where PVC acts as a replacement or refurbishment material.It's versatility is reflected in the wide range of applications it is found in such as pipes, cables, window frames, floor coverings, and roofing as well as packaging, interior design, clothing, billboards, marine, safety equipment, and medical products.
Applications of PVC pipe - Coal Seam Gas
2022 / 03 / 26
Coal seam gas production is water hungry business. Millions of gigalitres of water are brought to the surface, removed from the coal seam in order for the gas to be extracted. Conservative estimates suggest coal seam gas wells could draw 300 gigalitres of water from the ground each year from the some 40,000 coal seam gas wells estimated for Australia. Once the water is brought to the surface, it needs to be transferred via a vast network of underground water pipes to large feed ponds on mining tenements. Large Diameter PVC pipes are the most cost effective material to build underground water pipes to get water from the gas fields to the water treatment plants, often located more than 50 kilometres away. PVC pipes potentially offer a 20% cost reduction in building water pipeline infrastructure over PE pipes in sizes ranging from 500 – 800mm. PVC pipe is also the best option for distribution of treated water back to the environment after the treatment plant. Compared to polyethylene (PE) and metal pipes, the relatively thin but strong PVC-O pipes have greater water volume carrying capacity and lower susceptibility to water hammer, particularly compared with steel and cast iron pipes due to lower wave speed. Besides its cost advantage, PVC is the best performing, most sustainable and the safest option for water infrastructure
Applications of PVC pipe - Large Diameter PVC-O Pipes-1
2022 / 03 / 26
The new release of PVC-O Pipe with diameters up to DN 600mm make them the best solution for medium and high pressure networks for potable water supply, sewer rising mains, recycled water systems, sewer rising mains, irrigation systems, and pumping systems. PVC-O Pipes are the most advanced pipes for the conveyance of high pressure water on the market. The process of molecular orientation greatly enhances PVC's physical properties and gives PVC-O a number of exceptional features. It becomes an unbeatable plastic in terms of strength, impact resistance, and flexibility without altering its chemical properties. PVC-O Pipes are virtually impossible to destroy by impact, virtually eliminating the possibility of breakages during installation or during on-site trials caused by drops or impacts. This makes for a plastic with unbeatable qualities in terms of resistance to traction and fatigue, flexibility, and impact resistance. When used in high pressure water pipelines, this type of piping is virtually indestructible and is expected to have a lifetime in excess of 100 years. Compared to PE and metal pipes, the relatively thin but strong PVC-O Pipes have greater water volume carrying capacity and lower susceptibility to water hammer especially compared with steel and cast iron pipes due to lower wave speed (celerity).
Applications of PVC pipe - Large Diameter PVC-O Pipes-2
2022 / 03 / 26
When PVC-O Pipe is used for high pressure pipelines they have a number of performance and environmental benefits compared to alternative products. The pipe is highly energy-efficient and environmentally-friendly during all its useful life because of the considerable savings in raw material. DN600 PVC-O Pipe will be less than half the weight of PE and one third of the weight of equivalent DI pipe. Combining their large internal diameter with low friction, PVC-O can move water faster than the alternatives. The latest PVC-O pipes are designed to withstand 25bar water pressure long-term and meet the top Class 500 rating of having a minimum tensile strength of 50MPa.For all these reasons, PVC-O pipes are the best solution for medium and high pressure networks for potable water supply, sewer rising mains, recycled water systems, irrigation systems, and pumping systems.
PVC foaming regulator detailed introduction
2022 / 03 / 26
PVC foaming regulator (ACR), also known as "solid plasticizer for rigid PVC", it firstly accelerates the melt adhesion and plasticization of the overall PVC material, reduces the processing temperature, and secondly increases the plasticity of the PVC material. Fluidity, thirdly, under the above effect, the melt strength of the material increases, so that the foamed cells are uniform and dense; the surface cleanliness of the material is increased in appearance, and the mechanical properties of the material are assisted in the internal performance. For PVC foam materials, the role of foam regulators can be described as the greatest. The number of PVC foam regulator manufacturers has increased a lot in recent years. In order to price competition, the products are mixed. There are many kinds of PVC foaming regulators with different performances, which are easy to dazzle customers. Improper use or improper selection of manufacturers will reduce the quality of foamed products, or even fail to produce products normally, so that production cannot be carried out normally, and the cost will increase. It is necessary to have an in-depth understanding of foaming regulators. PVC foaming regulator is a copolymer formed by methacrylate and acrylate raw materials through a special emulsion polymerization process. It can also be called ACR or PVC Foam regulator. In my country, for foaming regulators, viscosity is a very important indicator, which represents the molecular weight of foaming regulators. Viscosity from the initial <10.0, to 10.0-11.0, to the current >=12.5. According to market feedback, the viscosity of the foaming regulator for thick plates of Shandong CREATE Chemical Co., Ltd. even reached 13.0 or more, the performance was stable, and the dosage was relatively small. For PVC foaming regulators, the melt strength cannot be ignored. Generally, the melt strength of foaming regulators with
Analysis of PVC foaming regulator
2022 / 03 / 26
In the PVC foaming formula, in order to obtain more uniform, small and independent cell structure products, in addition to the selection of foaming agents such as: AC foaming agent, etc., a foaming regulator is also used in the general formula system, sometimes A foaming regulator (adjusting the temperature of the foaming agent) will also be added, such as metal oxides such as zinc oxide and lead oxide, organic acid salts such as zinc stearate, and urea derivatives. PVC foaming regulator is actually an acrylate emulsion polymer, which has all the characteristics of PVC processing aids, and its molecular weight is much higher than that of PVC processing aids. In PVC foamed products, the purpose of adding foaming agent is mainly to improve the melt strength of its melt and prevent the merger of bubbles, so as to obtain uniformly foamed PVC foamed products. At the same time, it can also promote the plasticization of PVC and ensure that the melt has good fluidity. When choosing a PVC foaming regulator, it should be noted that PVC with different degrees of polymerization, such as PVC-700, PVC-800, and PVC-1000, should use different foaming regulators. Different products, such as: foamed board, foamed thick board, foamed thin board, wood-plastic foamed board, lead-plastic foamed board, etc., need to use different foaming regulators. Since PVC foaming aids are also acrylates and have the properties of processing aids, attention should also be paid to the internal and external lubrication balance of the formula when using them. The foreign products of PVC foaming regulator mainly include Rohm and Haas K-400P, K-385, K-418 of the United States; PA-40 and PA-60 of KANEKA of Japan. PVC foaming regulator 530 can adjust the cell density and uniformity of PVC foamed pipes and sheets, improve the surface quality and increase the strength of the melt. It is widely used in foamed PVC sheets, PVC pipes and PVC pro
dosage in the process of using PVC foaming regulato
2022 / 03 / 26
Do you know how much to use for PVC foaming regulator? Some customers say that the more the dosage, the better, but the actual situation is not the case, so how do we control the dosage of PVC foaming regulator? Some manufacturers of PVC foaming regulators said that their dosage should be used according to the amount of materials, because different quantities of plastics require different PVC foaming regulators, so if PVC is not used according to the amount of materials Foaming regulator, it is possible that the plastic cannot be molded or other conditions will occur. PVC foaming regulator has a more obvious effect on improving the performance of plastics, but this requires us to be reasonable and control the amount of PVC foaming regulator used, because too much PVC foaming regulator may cause some other plastics to appear. The problem, not only can not improve the performance of plastics, but also lead to poor performance of plastics. In addition to the above situations, in order to ensure the good effect of the equipment, we also need to clean the equipment regularly, so as to prolong the use time of the equipment and ensure its efficiency.
Encapsulated red phosphorus (RP) flame retardant masterbatch
2022 / 03 / 19
In order to increase the flame resistance of polymer materials, they are mainly used in polymer materials such as plastics, rubber, fibers and so on. Most of these materials can be burned. Plastics, in particular, must be used in transportation, construction, electrical equipment, aviation, space flight and so on. It is urgent to solve the problem of its anti-combustion. The use of flame retardants should generally meet the following conditions: do not reduce the physical properties of polymer materials, such as heat resistance, mechanical strength, electrical properties; decomposition temperature should not be too high, but can not be decomposed at processing temperature; good durability; good weather resistance; low price. Generally speaking, organic flame retardant has a good affinity. In plastics, bromine flame retardant occupies an absolute advantage in organic flame retardant system. Although there are many "criticisms" on environmental protection, it has been difficult to replace other flame retardant systems. Among non-halogen flame retardants, red phosphorus is a better flame retardant, which has the advantages of low additive, high flame retardant efficiency, low smoke, low toxicity and wide use. Red phosphorus is compounded with inorganic flame retardants such as aluminium hydroxide and expansive graphite to form composite phosphorus/magnesium, phosphorus/aluminium, phosphorus/graphite and other non-halogen flame retardants, which can be used as flame retardants. The volume of plastic products is greatly reduced, thus improving the processing performance and physical and mechanical properties of plastic products. However, ordinary red phosphorus is easy to oxidize and absorb moisture in the air, easy to cause dust explosion, transport difficulties, poor compatibility with polymer materials and other defects, the application
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Email:manager.han@novistagroup.com
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