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.
News
Home > News
Heat stabilizer market ready for product changes-2
2022 / 04 / 16
In terms of processing properties, the tendency of CaZn stabilizers to plate-out in tools and calibration has been reduced to the same level as lead. When processed with suitable lubricant systems, CaZn-stabilized profiles compare favorably with lead-stabilized profiles in terms of processability and surface gloss. Weathering performance is a critical issue in stabilization of building profiles. Testing indicates CaZn stabilizers achieve a better color hold than traditional lead systems. This effect is particularly relevant for dark colored profiles where additional cost savings may be realized by lower colorant requirements due to the reduced whitening pigment effect of CaZn compared to lead. Liquid tin stabilizers used in the United States require a high dosage of titanium dioxide (TiO2) for sufficient weathering stability. Widely used solid lead stabilizers work with a much lower TiO2 level even under extreme weathering conditions.
2022 / 04 / 16
PVC Stabilisers are added either directly into PVC or in combination to prevent oxidation, chain scission, uncontrolled recombination, and cross-linking reactions caused by photo oxidation. Essentially, they protect PVC from the harmful effects of extreme temperature and ultraviolet radiations. PVC Stabilisers are of different types like Heat Stabilisers which are mainly used in Construction projects. Antioxidants are PVC Stabilisers that prevent oxidation of PVC from taking place due to atmospheric oxygen. Hindered amine light stabilizers are PVC Stabilizers that scavenge radicals produced by weathering. The next type of PVC Stabilisers are UV absorbers. They dissipate energy absorbed by UV rays. Antiozonants are PVC Stabilisers that prevent degradation of materials cause by Ozone gas present in the atmosphere. Lastly, PVC Stabilisers are available in the form of Organosulfur Compounds that thermally stabilize polymers. Usage PVC Stabilisers are mainly used in the manufacture of Pipes and Fittings, Window Profiles, Rigid and semi-rigid films, wires and cables, coatings, and flooring etc. PVC Stabilisers are available in the form of Heat and UV Stabilisers, Flame Retardants, Smoke Suppressants, Plasticizers, Processing Aids, Impact Modifiers, Thermal Modifiers, Pigments, and Fillers that are added to PVC for strengthening purposes. The applications of a PVC Stabiliser are in all places where PVC is used. PVC is widely used in construction material, medical devices, children`s toys, protective housing for cables and wires, manufacture of credit cards etc. PVC is also used in rubber seals, vinyl fabrics, and automotive parts. Impact Modifier/Processing Aid PVC Stabi
2022 / 04 / 16
Flame retardant is a kind of additive which can prevent the ignition of polymer materials or inhibit the flame propagation. Common and important flame retardants are compounds of phosphorus, bromine, chlorine, antimony and aluminum. Flame retardants can be divided into additive type and reactive type. The additive flame retardants mainly include phosphate ester, halogenated hydrocarbon and antimony oxide. They are mixed into the composite during the processing of composite materials. They are easy to use and have a wide range of applications, but they have an impact on the properties of the composite materials. Reactive flame retardant is a kind of monomer material added into the polymerization system in the process of polymer preparation, which is compounded to the polymer molecular chain through chemical reaction. Therefore, it has little effect on the properties of the composite and has a long flame retardancy. Reactive flame retardants mainly include phosphorus containing polyols and halogenated anhydrides. The flame retardants used in composite materials should have the following properties: 1) high flame retardant efficiency, which can give the composite good self extinguishing or flame retardant properties; 2) it has good compatibility with the composite materials and is easy to disperse; 3) it has a suitable decomposition temperature, that is, it does not decompose at the processing temperature of the composite, but can decompose rapidly when the composite is decomposed by heating The results show that the flame retardant effect is not toxic or low toxic, odorless and pollution-free, and no toxic gas is produced in the process of flame retardant; 4) when used with composite materials, the mechanical properties, electrical properties, weather resistance and thermal defor
Flameout method of flame retardants
2022 / 04 / 16
1. It produces a gas that smothers the flame. For example, antimony trioxide reacts with HCl from combustion in PVC to form a smoldering gas, namely antimony nitrogen oxide. 2. It can absorb the heat produced during combustion and cool down the combustion rate. For example, aluminum hydroxide contains up to 34% of chemically associating water in its molecules, which remains stable at the processing temperature of most plastics, but begins to decompose when it exceeds 200 ℃ and releases water vapor. And every gram of aluminum hydroxide decomposition, to absorb 36 kcal heat. 3. It provides a coating insulated from oxygen. For example, the phosphide produced by the combustion of phosphate flame retardant is an oxygen barrier coating. 4. It can form free radicals which can react with plastics and act as flame retardant. The combustion properties of the products from their reaction with plastics are very poor. Novista Group supplies equivalent of FP-2100JC, FP-2200S, FP-2500S, Exolit OP1230, OP930, OP1312, OP1314 to global market
2022 / 04 / 16
As the name suggests, flame retardants are additives used to prevent materials from being ignited and inhibit the spread of fire. They are mainly designed for the flame retardant of polymer materials. Generally speaking, flame retardants mainly play the role of endothermic, covering, chain inhibition and non-combustible gas suffocation to achieve the flame retardant effect. Materials processed with flame retardants can effectively prevent and delay the spread of flames when attacked by external fire sources. Flame retardants are divided into two categories: organic flame retardants and inorganic flame retardants. Among them, organic flame retardants include organic phosphorus flame retardants and organic halogen flame retardants. The representative products of organic halogen flame retardants It is an organic brominated flame retardant; inorganic flame retardants are mainly various metal oxides, There are big differences in performance, flame retardant efficiency and environmental protection among the three major types of flame retardants: organic halogen, organic phosphorus and inorganic, and their application fields are also different. Various flame retardant properties Compared with organic halogen flame retardants, organophosphorus flame retardants are characterized by low toxicity, less smoke, low corrosion, good compatibility with materials, and du
How to Classify Acrylate Polymers?
2022 / 04 / 09
Acrylate polymers can be divided into the following categories according to their chemical composition: methyl methacrylate (MMA)/acrylate copolymer, MMA/styrene copolymer, acrylonitrile/styrene and so on. According to their functions, they are mainly divided into impact modifiers and processing aid. Impact modifiers mainly provide impact resistance of plastic products. Methyl methacrylate accounts for 10-20% o, acrylate accounts for 80-90% which is a core-shell structure with hard outside and soft inside. Processing aid can be divided into three main types according to their molecular weight and viscosity. 1. Molecular weight is 0.5-1.0million, intrinsic viscosity is 1.0-2.2. This kind of processing aid be called lubricating processing aids. It has the same good metal peeling performance as OPE WAX. The difference is that it has good compatibility with PVC, so it will not precipitate.nomrla type K175,ACR175 2. Molecular weight is 1.0-1.5 million, viscosity is 2.5-5.5. This kind of processing modifier is called accelerating plasticizing processing aids. It mainly promotes plasticizing, improves melt rheological properties, improves other additives dispersion, reduces plasticizing temperature and improves product appearance quality. normal type: ACR-401,K-120N,K-125,PA-21 3. Molecular weight is more than 1.5 million, viscosity is 10-14, this kind of processing aids is called foaming regulator, because it has ultra-high molecular weight, winding on the PVC structure to form a strong network structure, greatly improve the strength of PVC melt, can effectively encapsulate foaming gas, prevent gas escaping, form a uniform honeycomb porous structure, improve product surface quality, improve high gloss.
Uses of chlorinated polyethylene
2022 / 04 / 09
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.
2022 / 04 / 09
Impact Modifiers for PVC are added to composite materials to improve the durability and toughness of plastic resins. In addition to impact performance, a number of other material characteristics such as optical and tensile properties, weatherability, processability, flammability, heat distortion and cost can also be improved by adding impact modifiers to PVC. One of the main applications of impact modifiers is in PVC resins: MBS (methyl butadiene styrene) and acrylics (impact modifiers) increase the impact resistance of PVC products without impairing other properties. Impact resistance is one of the most critical properties in most plastics, especially styrenics, polyamides, PVC and thermosets. To solve this fragility problem, a mixture with a specific polymer or copolymerization with a monomer is usually carried out, generating a more flexible plastic material, which absorbs the impact generated energy and dissipates it in a non-destructive way. The impact modification is somewhat complex, as it influences a lot other properties such as fluidity, gloss, elastic modulus, maximum processing temperature, etc. Other properties changes may not be linear and proportional to the amount of modifier incorporated in the polymer. contact me for more: whatsapp:86 13563682728, Mandy
What are the standards for the selection of flame retardants for nylon?
2022 / 04 / 09
Nylon has excellent properties and is widely used. Unmodified nylon has low flame retardancy, vertical combustion can only reach UL94V-2 level, oxygen index is about 24%, it will drip during combustion, it is a flammable material, and it is very easy to use in the process. Yes. catch fire. Therefore, reformed nylon flame retardants have become a common concern and research topic in today's academic and industrial circles. Next, Silver Plastic introduces the knowledge about nylon flame retardants. At present, the flame retardant modification of nylon materials is usually divided into halogen-containing flame retardant modification and halogen-free flame retardant modification. One. Halogen-containing flame retardant systems The most widely used abroad is brominated styrene polymer, which has excellent thermal stability and is being processed because it can be melt-mixed with nylon. The fluidity of the medium is good. In addition, the flame-retardant nylon prepared by using it also has excellent electrical, physical and mechanical properties. The limitations of this flame retardant are its low light stability and incompatibility with nylon. It is also more expensive than decabromodiphenyl ether, which is widely used in China. Another flame retardant that has been used in nylon for many years is flammable. It is a chlorine-containing flame retardant with high efficiency and electrical properties, but thermal stability. Due to this limitation, it is only suitable for nylon flame retardant systems with low processing temperatures.
Effects of Flame Retardant and Glass Fiber on the Properties of PA66
2022 / 04 / 09
Due to the needs of electronic product applications, PA66 must have certain flame retardancy and relative tracking index (CTI) properties. Also, depending on product strength requirements, it may be necessary to add glass fibers to the PA66 material. Commonly used flame retardants are nitrogen flame retardants, bromine flame retardants and red phosphorus. (1) Under normal circumstances, the flame retardant grade of pure nylon PA66 is UL94V-2, and the CTI value can reach CTI600. (2) When glass fiber is added to pure PA66 to increase the strength, the glass fiber is used as the core, which reduces the flame retardant grade of the material and becomes UL94-HB grade. (3) Using nitrogen-based flame retardant for PA66 and no glass fiber, it can reach UL94V-0, and the CTI value can reach 600V. (4) When glass fiber is used in PA66 and nitrogen-based flame retardant is added, the flame retardant performance of the material will also deteriorate and reach HB level. (5) PA66 also becomes UL94V-0 flame retardant grade when brominated flame retardant is added, and in the case of glass fiber reinforced material, it becomes UL94V-0 grade. However, the addition of bromide greatly reduces the CTI index of the material. Basically CTI175 or CTI250 grade. Low CTI limits the application of PA66. All Glow Wire 750 PA66 materials required by the industry are brominated flame retardants. Of course, the CTI value is not high. (6)
Flame retardant: an essential patron saint of safety
2022 / 04 / 09
On July 6, 2013, Asiana flight 214 crashed when it landed in San Francisco, its fuselage caught fire and emitted thick smoke. In this accident, although the plane caught fire, the vast majority of passengers survived smoothly. It is a kind of chemical product widely existing in our life, but often ignored, that is flame retardant. As a conventional means of fire prevention, flame retardants are widely added to a variety of materials. Flame retardant is indeed the invisible patron saint of life. Flame retardant is a kind of additives which can delay the ignition time and inhibit the spread of fire. They inhibit the occurrence of combustion reaction through a variety of action principles. Inorganic flame retardants such as aluminum hydroxide and magnesium hydroxide generate water when heated, which absorbs a large amount of heat in the process, and also plays the role of isolating oxygen; brominated flame retardants can capture the free radicals in the combustion reaction and terminate the occurrence of chain reaction; in addition, some flame retardants can make the surface of materials rapidly expand and carbonize to form a protective layer. From plastic products, synthetic leather, chemical fiber fabrics to foam insulation materials in buildings, there are polymer materials everywhere in our lives. These materials have many advantages in performance, but there is an obvious defect: they are easy to burn, thus burying a fire hazard. In order to eliminate the hidden dange
Sustainable Water Infrastructure with PVC Pipes
2022 / 04 / 09
Sustainability is the capacity to endure. In large measure, the longer something lasts, the more sustainable it is. PVC and similar materials are 30 – 70% less expensive easy to install, environmentally friendly, noncorrosive and durable with an expected design life of more than 100 years without the extensive and expensive corrosion treatments needed for more traditional pipe materials. PVC meets the demands and expectations of sustainable water. Sustainability is not the case with pipe materials that corrode. SAVING ENERGY - PVC pipe manufacturing is extremely efficient, with virtually 100% of the compound being used during the production of PVC and its conversion into finished products. It takes four times less energy to make than concrete pipe, and half that used for iron pipe. CONSERVING WATER - PVC pipes ultra-smooth surface reduces pumping costs, and its leak-free joints eliminate water loss – which can be up to 40 per cent in some old technology piping networks HIGHER WATER QUALITY - Unlike pipes made from traditional materials, the exceptionally smooth walls of PVC pipes make it extremely difficult for sediment to accumulate. Bacteria and other particles have virtually no chance to attach themselves to the pipes inner walls - a major advantage for sewer pipe systems, which often need to transport waste water containing significant quantities of sediments. SAVING MONEY- There is significant cost savings to using PVC pipes, even more so when installation, low breakage rates and life cycle costs are taken into consideration. The longevity of the pipes also mean the pipes function more efficiently, reducing maintenance and ongoing work to the pipe making it more affordable over time. PROVEN LONGEVITY- PVC Pipes have 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....
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 in corrosion-prone pipin
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
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,
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
Send Inquiry
Mr. Ron Han
Tel:86-536-8206760
Fax:86-536-8206750
Mobile Phone:+8615336365800
Email:manager.han@novistagroup.com
Address:RM1232-1233,#4 Building No.4778 Shengli East Street, Weifang, Shandong
Related Products List
Mobile Site
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.
Fill in more information so that we can get in touch with you faster
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.