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Flame Resistant vs Flame Retardant
2019 / 03 / 09
Anyone that has ever been burnt will tell you to respect heat. Burns are one of the worst types of injuries. They don`t heal quickly, can be incredibly painful and in some cases, it can be a chore to keep the wound clean while it heals. Often with burns, first comes fire. Fire can be incredibly dangerous in the right circumstances and because of this. Many companies now have stringent rules and regulations in place to limit risks. While fires at work may not seem to be a problem you think will affect you, burn related injuries can be around any corner, especially in the Oil and Gas industries, Iron Working, Welding and more. In fact, the American Burn Association reported that approximately 486,000 people received medical treatment for burns in 2016. Now the basics of putting out a fire (especially once you are on fire) should have already been covered when you were in elementary school. Stop, Drop and Roll are great recommendations for things to do once you`re already on fire but is there a way we can avoid it all-together? As it turns out, there is. One of the most common ways to avoid burns is to stay away from hot things. Well that really isn`t an option for certain professions, so flame resistant and flame-retardant clothing rules became standardized for those industries.
2019 / 02 / 25
Polyvinyl-Chloride (PVC) is a plastic product which has matchless versatility. It effectively replaces wood, paper and metal in several applications. As such plastic pipes have been progressively replacing conventional pipes like G.I., Cast Iron, Asbestos Cement or Stone-ware for a number of important and uses. Among the various types of plastic pipes which are commonly used for such applications PVC pipes are the most widely used all over the world on account of their most favourable balance of properties. PVC pipes are light in weight, rates for use under pressure, easy to install, low frictional loss, low on maintenance cost, and have low frictional loss. Rigid PVC pipes have wide variety of uses in fields like city/town/rural water supply scheme, spray irrigation, deep tube well schemes and land drainage schemes. Market Potential: PVC pipes are used for a variety of purposes e.g. water supply schemes, spray irrigation, deep tube well schemes and land drainage schemes. PVC slotted and corrugated pipes are ideal systems for drainages of water from land where water logging is inevitable. It is widely used by various utility services now-a-days too. The major consumer of PVC pipes are the Public Health Engineering Department and Irrigation Departments. Besides these two, it is used by the Municipal Corporations, Tea estates as well as in N.E. Region. The usage of PVC pipes also depends upon the size of these pipes too. It is manufactured in different sizes having innumerable usage value. Novista is PVC additives & polymers supplier for PVC pipe processing.
2019 / 02 / 18
Plastic additives can extend the service life of plastic products and play a significant role in the recycling of plastics. It can be said that the plastic industry must realize the innovation and development of additive products in order to achieve energy saving and industrial upgrading. There is a misunderstanding in society now that plastics have been 'demonized' and plastics have become the chief culprit of 'white pollution'. In fact, plastic itself is an energy-saving and environmentally friendly material, with plastic steel and plastic substitute wood. It not only saves energy, but also saves resources. At present, it is necessary to realize the upgrading and sustainable development of the plastics industry and to solve the problems of high energy consumption and serious pollution in the plastics processing and plastics recycling process. Plastics additive products are an indispensable link. According to experts, the use of additives can achieve melt viscosity reduction, temperature and pressure reduction during the processing of plastics, which can significantly reduce energy consumption per unit of output, and the use of additives can significantly extend the service life of the product. It is also another sense of environmental protection. At the same time, plastic additives also play an important role in the plastic regeneration process. The pollution produced during the recycling and regeneration of plastics is currently very difficult to regulate and is a serious area of pollution. However, through technological innovations, especially the use of suitable additives, energy conservation, consumption reduction and pollution reduction can be achieved, and can be greatly Improve the quality of recycled materials. Good additives can even make the performance of recycled materials not inferior to The new material, such as the choice of a suitable plasticizer, can make the processing performance of the
How to understand the structure and properties of polyphenyl ether PPO material
2019 / 02 / 16
1, PPO polyphenylene oxide, usually referred to as poly 2,6- two methyl -1,4- phenyl ether, or PPO (Polyphenylene Oxide), is a comprehensive thermal engineering plastic with excellent properties. 2, PPO synthesis: 2,6- two methyl -1,4- phenyl ether is formed by condensation reaction with oxygen under the action of copper amine catalyst. 3, the relationship between the structure and the nature of PPO: (a), aromatic ring makes the rotation of molecular chains difficult, so PPO has poor fluidity and poor processability. (b), the methyl groups on benzene ring increase resistance and rigid structure, making PPO rigid, high hardness, high stability and strong chemical resistance. (c), the PPO terminal group is phenoxy, so the thermal oxidation resistance is poor. The thermal stability of PPO material can be improved by blocking the ends of antioxidants or isocyanates. 4. Summarize the characteristics of PPO: Excellent properties: high tensile strength, high modulus, high impact resistance, hardness and rigidity, hard and tough material, good creep resistance, good wear resistance, low friction coefficient, good heat resistance, heat deformation temperature of 190 degrees centigrade, glass transition temperature 210 centigrade, thermal
2019 / 02 / 13
Polyvinylchlorid (PVC RESIN)The full name is Polyvinylchlorid, the main component is polyvinyl chloride, and other ingredients are added to enhance its heat resistance, toughness, and ductility. It is a well-loved, popular and widely used synthetic material in the world today. Its global use ranks second among various synthetic materials. According to statistics, in 1995 alone, PVC production in Europe was about 5 million tons, and its consumption was 5.3 million tons. In Germany, the production and consumption of PVC is an average of 1.4 million tons. PVC is being produced and applied worldwide at a rate of 4%. The growth rate of PVC in Southeast Asia is particularly significant, thanks to the urgent need for infrastructure construction in Southeast Asian countries. Among the materials that can produce three-dimensional surface films, PVC is the most suitable material.PVC can be divided into soft PVC and hard PVC. Hard PVC accounts for about 2/3 of the market, and soft PVC accounts for 1/3. Soft PVC is generally used for the surface of floors, ceilings and leather, but because soft PVC contains softener (this is also the difference between soft PVC and hard PVC), it is easy to become brittle and difficult to store, so its scope of use has been limited. Hard PVC does not contain softener, so it has good flexibility, easy to form, is not brittle, non-toxic and non-polluting, and has a long storage time, so it has great development and application value. Hereinafter referred to as PVC. The essence of PVC is a vacuum blister film, which is used for surface packaging of various types of panels. Therefore, it is also called decorative film and adhesive film, and is used in many industries such as building materials, packaging, medicine and so on. The building materials industry accounts for the largest proportion, at 60%, followed by the packaging industry, as well as several other small-scale applications.Polyvinyl chloride resin
2019 / 02 / 11
First produced commercially in the late 1920s, polyvinyl chloride, or PVC, has become one of the most widely used polymers in the world. Due to its versatility, PVC is used across a broad range of industrial, technical and everyday applications from window profiles and pipes to credit cards and blood bags. PVC has always been regarded as a resource-efficient material. Made from salt (57%) and oil (43%), it`s far less oil dependent than other major thermoplastics. It`s also highly durable and energy-efficient across a range of applications which makes for an effective use of raw materials and avoids unnecessary depletion of natural resources. Viewed across its life cycle, PVC is highly competitive in terms of its environmental impact. Several recent eco-efficiency and Life Cycle Assessment (LCA) studies on the most common applications show that, in terms of energy requirements and GWP (Global Warming Pote
Polyvinyl Chloride (PVC) Resins
2019 / 01 / 28
Polyvinyl chloride, more commonly known as PVC, is the third-most-widely produced synthetic polymer, after polyethylene and polypropylene. PVC is part of the vinyls chain, which also includes EDC and VCM. PVC resin grades can be used for rigid and flexible applications. The rigid grades of PVC are used in construction for pipe and in profile applications such as doors and window frames. It is also used for bottles, other nonfood packaging, and credit cards. PVC resin can be used in flexible applications by the addition of plasticizers. In this form, it is also used in wire and cable insulation, imitation leather, signage, inflatable products, roofing membranes, and many applications where it replaces rubber. PVC resin can combine with many additives, yielding PVC compounds that are then converted into a wide variety of forms, such as pipes, fittings, profiles, tubes, windows, doors, sidings, wire, cable, film, sheet, and flooring. This ability, together with features such as durability, nonflammability, resistance to chemicals and oil, mechanical stability, and ease of processing and molding, means that PVC is a competitive and attractive option for many end uses in construction and infrastructure, agriculture, electrical products, and healthcare. Thus, although its end-use portfolio has moved toward construction applications and away from many consumer items, PVC`s long-term future is secure. The following pie chart shows world consumption of PVC:
What should we pay attention to when using PVC foaming regulator?
2019 / 01 / 23
(Novista Acrylic Processing aids) PVC foaming regulator is a chemical product which must be used in the processing of foamed plastic products. In the use and storage of PVC foaming regulators, you must pay attention to some matters in order to ensure the quality of PVC plastic products. Especially in terms of storage. We know that in order to ensure the production of PVC plastic products, PVC foaming regulators will be purchased in bulk. The storage environment is related to the quality of PVC foaming regulator. Attentions should be payed to when storing PVC foaming regulator: First, the PVC foaming regulator will change its properties when encountering heat, so it needs to be away from flames, heat pipes, heaters, or other heat sources. Adding a PVC foaming regulator will cause dust, which can be the great damage to the body if it comes into contact with the eyes or skin. Therefore, avoid during processing. If it accidentally gets into the eyes or come into contact wit
The Commercial Applications of Expanded PVC Foam Board
2019 / 01 / 21
While PVC foam board is used across a wide spectrum of commercial applications thanks to the material`s versatility, what exactly is this type of plastic? Moreover, what are the different ways that expanded PVC foam board can be used? As it turns out, there are several benefits to this type of plastic that make it a useful material for commercial projects. Take a look: What is Expanded PVC Foam Board? Expanded PVC foam board, also known as expanded polyvinyl chloride (PVC), is a lightweight, rigid form of expanded foam polyvinyl chloride. It is commonly used for commercial purposes like digital and screen printing, laminating, vinyl lettering, signage, and more. Eco-friendly and non-toxic expanded PVC sheets provide strength, durability, and flame and chemical resistance while remaining easy to cut and shape. How is Expanded PVC Foam Board Made? Expanded PVC foam board may come in a variety of different densities; as a result, the raw ingredients used to make the plastic are mixed together under controlled conditions and then dispensed into a mold based on the desired application. The mold is then sealed, clamped shut, and placed in a large press where it is then heated. Finally, the material is expanded in a hot water bath to reach its final destiny and cured. Once cured, the blocks are cut into sheets of various thicknesses. An expanded PVC foam board can be cut to size as easily as wood, softened and shaped to fit a specific need. Not to Be Confused with Foam Board Expanded PVC foam board is often confused with foam board, but don`t get it twisted, there are vast differences between these two materials! Foam board or foamcore, consists of polystyrene foam and can have an outer facing of paper on either side. It is frequently used for light duty, indoor applications. It is also popular to use as backing material in picture framing or in photograph
The instructions and usages of Acrylic Processing Aid
2019 / 01 / 16
(Acryllic Processing Aids from Novista Group) Name of Product: Acrylic Processing aids Related names: PVC processing aid, high Molecular Weight Processing Aid, lubricant Processing Aid, transparent Processing Aid. Main components: Methacrylates, Acrylates, etc. Properties: This product is white powder, viscosity 0.2-13.5, 40 mesh screening rate >99.0, apparent density 0.35-0.55, volatile matter <1.5 Features: 1.It has good compatibility with PVC, good dispersibility, and is entangled with PVC molecular chain to promote PVC melt plasticization, effectively reduce the melt processing temperature of PVC, and improve the weather resistance of products on the basis of small energy saving; 2.It can change the melt rheological behavior of PVC material, improve the fluidity of PVC material, so that it is easier to form and extrude, ensuring the stability of long-term processing and molding; 3.It can improve the melt strength of PVC materials, avoid melt fracture, can solve surface problems
PVC plastic additives overall growth rate will maintain balance in China
2019 / 01 / 14
PVC plastic additives are the most widely used and most used plastic additives. Since pvc resin is more necessary and easier to use with other additives to improve or improve performance, PVC plastic is cheap and practical, and it is the most widely used and used in all types of plastics. Therefore, the current plastic additives are mainly PVC. Plastic additives are mainly used, accounting for about 90% of plastic additives. From the demand growth rate of PVC plastic products in China, the overall growth rate of plastic additives will be maintained at 8%-10%. Cost-effective ACM replaces low-quality CPE, and MBS achieves import substitution. In 2013, the global production and consumption of impact modifiers and processing auxiliaries reached nearly 900,000 tons, of which China's consumption accounted for more than 30%. From the perspective of the modification effect on plastic products, ACM is the best low temperature toughness and the most cost-effective product; ACR is the best comprehensive performance of impact modifier, and MBS is the impact modification that must be added to transparent products. Environmental protection standards have become stricter, and organic phosphorus-based flame retardants have ushered in development opportunities. It is estimated that by 2018, the global market capacity of flame retardants will reach 2.62 million tons, with an annual growth rate of about 5%. At present, the total production capacity of domestic flame retardants is about 500,000 tons. According to the growth rate of 10% of plastic products, the consumption of plastic flame retardants in China will reach 360,000 tons in 2016, while the current production capacity of flame retardants in China exceeds 500,000 tons. , basically meet the needs of the future growth of flame retardants. In recent years, organic phosphorus-based flame retardants have become faster and faster in place of organic halogen-based flame retardants due to their environme
several typical flame retardants
2019 / 01 / 12
(1) halogen flame retardant (2) phosphorus and phosphorus compounds (3)Inorganic Flame Retardants: aluminum hydroxide, magnesium hydroxide, expanded graphite, borate, aluminum oxalate and zinc sulfide. (4) mixed flame retardants(5) intumescent flame retardant: intumescent flame retardant system can be divided into three parts: acid source, carbon source and gas source.(6) ammonium salt flame retardants(7) nanocomposite flame retardants(8) organosilicon flame retardant PVC Impact Modifier PVC Additives PVC Processing Aid Acrylic Impact Modifier Acrylic Processing Aid PVC Heat Stabilizer PVC Lubricant CPVC Compound CPVC Additives
2019 / 01 / 07
Man has worked hard from the earliest times to develop synthetic materials Alchemists tried to develop new materials which would offer benefits not found in the natural products around him.PVC is one of the oldest synthetic materials with the longest history in industrial production. Its early history is of multiple and accidental discovery in different places at different times as well as unsuccessful quests for commercial application.Henry Victor Regnault discovered PVCEarly researchers accidentally discovered PVC on at least two occasions in the 19th century. The first, in 1838, was by the French physicist and chemist Henri Victor Regnault and the second in 1872 by the German Eugen Baumann. On both occasions, the polymer appeared as a white solid inside flasks of the newly discovered vinyl chloride gas that had been left exposed to sunlight. The material was difficult to work with and no one mastered the challenge of commercial applications.In 1913, German inventor Friedrich Heinrich August Klatte took out a patent on PVC. His method used polymerization of vinyl chloride with sunlight.The most significant breakthrough occurred in the United States when the company BFGoodrich hired the industrial scientist Waldo Semon to develop a synthetic replacement for the increasingly costly natural rubber. His experiments again produced polyvinyl chloride. However, the material was threatened by the recession in the 1920s and it was under threat of abandonment that Semon conceived the idea of PVC as a water resistant coating for fabrics. Sales took off quickly with a rapidly expanding product range. Demand accelerated again during the Second World War, when PVC quickly replaced traditional material to insulate wiring on military ships.During the 1950's many more companies started to produce PVC and volumes increased dramatically around the world. Developers quickly found further, innovative uses through the decade an
Difficulties in finishing polyester cotton flame-retardant fabrics
2019 / 01 / 05
Polyester cotton fabric is well received by consumers due to its excellentperformance and durability. However, because of its easy combustion, it can cause fire accidents and lead to huge losses. Therefore, the research of flame retardant finishing has received widespread attention. So far, it has been found that the flame retardant finishing of polyester cotton fabric is far more difficult than the flame retardant of any component. The main reasons are as follows: (1) the mutual heat induction of two polymers of polyester and cotton or their cracking products accelerates the spillover of the cracking products, so the ignition speed of polyester and cotton fabric is much faster than pure and pure cotton; (2) during the combustion process, the flame retardant will migrate between the two components of polyester and cotton, and therefore, it is also given to the polyester and cotton fabric. The flame retardancy caused difficulties; (3) because cotton is a non melted and non shrinkage flammable fiber, when the polyester and cotton products burn, the cotton fibers carbonized, a kind of scaffolding similar to the
The growth of demand for PVC additives industry
2019 / 01 / 02
With the development of PVC industry, especially the rapid development of plastic profile and plastic pipe industry, the demand for processing aids has also increased rapidly. At present, the PVC auxiliary industry is developing rapidly. Today, we will look at PVC processing aids and make major breakthroughs in the following four directions. (1) Super plasticizing processing aid It is suitable for large amount of filler, large external sliding dose, weak shearing force of equipment, need to greatly increase shearing force, increase the viscosity of melt strong body, and can make up for the weak shearing force of equipment and the large amount of filler in the formula. The melt viscosity is reduced, which breaks through the defects of the conventional processing aid when the plasticization speed is fast, the melt viscosity is low, and the plastic viscosity is slow when the melt viscosity is large. (2) Super melt strength processing aid It is suitable for use when the amount of filler is large, the shearing force of the equipment is strong, and the melt strength needs to be greatly increased. The processing aids are characterized by a general plasticizing speed, but a high melt viscosity, which is more than three times that of the conventional processing aid AcR-401. (3) Lubricating processing aid Lubricants, especially external lubricants, can reduce the external friction of the melt and metal surfaces, prevent the surface of the melt from rupturing, and improve the surface finish of the product. However, if the shearing force of the
Technology progress of flame retardant additives in electrolyte of lithium battery
2018 / 12 / 24
The main factors limiting the popularity of electric vehicles include prices, infrastructure, mileage and safety. In fact, prices, infrastructure and endurance can be made up and improved in other ways, and security, which is the most important concern of the users, is also an important problem that the manufacturers of electric vehicles and lithium batteries must solve. The electrolyte of lithium battery usually uses organic solvents and is flammable under overheating conditions. Therefore, adding flame retardant additives in the electrolyte is one of the most economical and effective ways to improve the safety of the battery. At present, the main components of flame retardants for lithium ion batteries include phosphates, phosphite esters, organic halogenates and phosphonitriles. Alkyl phosphates (such as TMP, TEP, etc.) are the first to study the flame retardants used in lithium ion batteries, but their viscosity is larger and the electrochemical stability is poor. It will cause negative effects on the ionic conductivity and the recycling reversibility of the electrolyte while improving the flame retardancy of the electrolyte. Using F element to replace H on alkyl to get fluorinated alkyl phosphate (such as TFP, BMP, TDP), it can improve the reduction stability and flame retardance effect of the compound. In addition, phosphoric acid cresol two phenyl ester (CDP) and phosphoric acid two phenyl octyl ester (DPOF) and other aromatic phosphate ester also has good flame retardant effect.
Halogen-free flame retardant for Polyolefins
2018 / 12 / 08
Proflame®PNPO-G1 is an eco-friendly, halogen-free flame retardant specially used for polyolefins (PP, PE, TPE, TPU, EVA). ®PNPO-G1 is a complete flame retardant system, so there is no need to add other flame retardants in your formulations. ®PNPO-G1 is equivalent to Adeka FP-2200S,but is more cost-efficient than the latter. ®PNPO-G1 is a product from Novista Group Co. Ltd.
Halogen-free flame retardant for PP
2018 / 12 / 08
Proflame®PNPO is an eco-friendly, halogen-free flame retardant especially for PP. ®PNPO is an intumescent flame retardant system and can be used in both PP homopolymer (PP-H) and PP copolymer (PP-C). Economical versions of ®PNPO, which can only work in either PP-H or PP-C, are also available. ®PNPO is a complete flame retardant system, so there is no need to add other flame retardants in your formulations. And the suggested dosage to achieve UL94- V0 is between 20% and 30%. ®PNPO is a product from Novista Group Co. Ltd.
2018 / 12 / 01
With the expansion of the demand of PP in the automotive industry, construction industry,electrical insulation industry and shipbuilding industry, people have higher requirements for the flame retardancy of PP. But the limiting oxygen index value of PP (LOI) 17.0%-18.5% only, belong to flammable materials, combustion and charring rate low, combustion heat, combustion is easy to produce the droplet, easily make flame propagation two fires occurred, thus limiting the use of PP in many fields, so the flame retardant PP modification, is particularly important for expanding its application fields. At present, the flame retardants applied to PP can be divided into halogenated flame retardants, metal hydroxides, silicon flame retardants, nano flame retardants, phosphorus flame retardants, intumescent flame retardants, etc. Intumescent flame retardant (IFR) is a low toxic halogen-free flame retardant with P and N as main components. It is consistent with the development trend of flame retardant and environmental protection, and is a kind of environment-friendly flame retardant with wide application prospects. IFR plays a flame retardant effect mainly through the interaction of acid source, carbon source and gas source, which is generated by thermal decomposition to produce carbon layer. IFR has added less, efficient, low toxicity, low smoke and no droplet advantages than other flame retardant material has excellent flame retardant properties, therefore, intumescent flame retardant has attracted more and more attention
Influence of CPE on PVC processing performance
2018 / 11 / 27
CPE, Chlorinated Polyethylene, obtained by chlorination of a special High-Density Polyethylene (HDPE), that is, a product in which a chlorine atom partially replaces a hydrogen atom on a HDPE molecular chain. It is a white powder after drying and is non-toxic. CPE formula: [CH2-CHCl-CH2-CH2]n When the amount of CPE added is less than 5 PHR, the plasticization is delayed, and at 5 PHR, it has substantially no effect on the plasticization of the formulation system. When the CPE exceeds 5 PHR, it plays a role in promoting plasticization. With the increase of CPE, the plasticizing time of the formulation is shorter and shorter, the maximum plasticizing torque and balance torque are increased, and the plasticizing temperature is gradually decreased. CPE has a chlorine content of 35%. There are two segments in its structure: One is a chlorinated segment in which a hydrogen atom is replaced by a chlorine atom. This segment is structurally strong, similar to PVC, and has good compatibility. The other is a PE segment in which the hydrogen atom is not replaced by a chlorine atom. This structure has a weak polarity and is poorly compatible with PVC. It acts as an external lubrication between PVC and can delay the plasticization of PVC. The glass transition temperature of CPE is about 10 °C, and PVC is 80 °C. Under the test conditions, CPE shows a tendency to soften and soften earlier than PVC and a slightly higher viscosity. When the amount of CPE added is small, the total amount of polar segments with good compatibility betw
4 principles of halogen-free flame retardants
2018 / 11 / 24
Halogen free flame retardants have low smoke emission and no toxic or corrosive gases. Halogen free flame retardant additives are mainly phosphorus compounds and metal hydroxides. These two compounds do not volatilize and do not produce corrosive gases when burning. They are known as nuisance free flame retardants. The following is a brief introduction to the flame retardant principle of halogen free flame retardants. 1. endothermic action: any burning heat released in a shorter time is limited. If a portion of the heat released from the fire source is absorbed in a shorter time, the flame temperature will decrease, radiating to the burning surface and acting on the heat of cracking the combustible molecules that have been vaporized into free radicals, and the combustion reaction will be reduced. To a certain degree of inhibition. Under the high temperature conditions, the flame retardant has a strong endothermic reaction, absorbs some of the heat released from the combustion, reduces the temperature of the combustible surface, effectively inhibits the formation of combustible gas and prevents the spread of the combustion. The flame retardant mechanism of Al (OH) 3 flame retardant is to increase the heat capacity of the polymer, so that it absorbs more heat before it reaches the thermal decomposition temperature, thus improving its flame retardancy. These flame retardants give full play to their characteristics of absorbing large amounts of heat when combined with water vapor and improve their own flame retardancy.
Several advantages of flame retardant masterbatch
2018 / 11 / 17
Because of the flame retardant efficiency, environmental protection, efficiency, convenience and so on, the flame retardant masterbatch has become an effective substitute for the traditional flame retardant and has been widely used in the various aspects of plastic granulation, extrusion, injection molding and other aspects. The effective flame retardant masterbatch is also known as the flame retardant masterbatch for modified plastics plant. The following advantages of using functional flame retardant masterbatch in modification plant. 1. Reduce cost With the progress of science and technology, the continuous development of carrier plastics and equipment, high concentration, high dispersion and high compatibility are possible. A small amount of carrier is no longer the main cause affecting the flame retardancy. Thus, the ideal condition of the exchange of flame retardant and powdery flame retardant is realized, and the flame retardant effect is not constant, and the flame retardancy efficiency is improved. Together with the organic combination of the fire-retardant masterbatch, the cost is reduced by the collective purchase, and the cost advantage of the flame retardant masterbatch is guaranteed, so that the cost can be effectively reduced after the customer is used.
Analysis of technical parameters of low smoke halogen free flame retardant cable
2018 / 11 / 10
As we all know, jacket materials play an important role in protecting optical cables. The types of optical cables also vary with the variety of sheath materials, such as low smoke halogen free fuel, which is called low smoke halogen free flame retardant cable. However, some optical cable manufacturers are not fully aware of the sheathing materials. Sometimes, some indexes are ignored and other indicators are ignored, which leads to the lack of the required technical indicators. Sheathing material. In order to make the light cable manufacturing enterprises to have a more comprehensive understanding of the sheathing material, and to purchase the safe and high quality and cheap sheathing materials , we have carefully investigated and studied several important indicators of the sheath and listed some problems existing in the market of the sheathing sheath at present for everyone to participate in the examination. 1, low smoke halogen free flame retardant cable material oxygen index It represents the flame retardant performance of halogen free flame retardants in almost all eyes. Most people believe that the higher the oxygen index is,
THE DIFFERENCES BETWEEN CPVC AND PVC
2018 / 11 / 06
(CPVC pipes and PVC pipes) The main difference between CPVC and PVC is the range of temperatures each is capable of withstanding. CPVC can handle temperatures up to 200° Fahrenheit, while PVC peaks at 140° Fahrenheit. Above those temperatures, both CPVC and PVC will begin to soften, increasing the risk of joints and pipes failing. The primers, solvent cements, and bonding agents are different for PVC and CPVC due to the differences in their chemical composition. For example, CPVC solvent cements must meet ASTM F493 specifications, and PVC solvent cements must meet ASTM D2564 specifications. Because of this, CPVC and PVC pipes and fittings, along with their solvents and bonding agents, should not be used interchangeably. In addition to meeting ASTM specifications, there are different solvent cements required based on the pipe`s size and intended application, so check the product containers to be sure you`re using the correct agent for the correct application. PVC comes in nominal pipe sizes only, while CPVC is available in both nominal pipe sizes and copper tube sizes. CPVC has greater flexibility than PVC, and requires support at three foot intervals to maintain its position. CPVC and PVC visual differences: --PVC pipes are white or dark gray in color. --CPVC is off-white, light gray, or yellow. --Both pipe types have technical specifications printed on the side for easy verification. --Both pipe types are
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