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Comprehensive analysis of diversified application of CPE
2022 / 10 / 29
1.What are the applications of chlorinated polyethylene-CPE? Chlorinated polyethylene,CPE can be processed by injection molding and extrusion molding. However, because CPE contains a large number of chlorine atoms, a certain proportion of heat stabilizers, antioxidants and light stabilizers should be added to the CPE before molding to protect the stability of its composition and performance. CPE with low chlorine content can also be used for rotational molding and blow molding. At present, chlorinated polyethylene is mainly used as a modifier of PVC, HDPE and MBS in the plastic products industry. After blending a certain proportion of CPE in polyvinyl chloride resin, products such as pipes, plates, wire insulation coatings, profiles, films, shrink films, etc. can be extruded using general PVC processing equipment; it can also be used to coat and compress mold Plastic, lamination, adhesion, etc .; used as modifiers of PVC and PE, can improve product performance, improve the elasticity, toughness and low temperature performance of PVC, brittleness temperature can be reduced to -40 ℃; weather resistance , Heat resistance and chemical stability are also better than other modifiers; As a modifier of PE, it can improve the printability, flame retardancy and flexibility of its products, and increase the density of PE foam. 2.What role does CPE play in plastics production? Chlorinated polyethylene (CPE) is a saturated polymer material. Its appearance is white powder, non-toxic and odorless. It has excellent weather resistance, ozone resistance, chemical resistance and aging resistance. It has good oil resistance, flame resistance and coloring. performance. Good toughness (still flexible at -30 ° C), good compatibility with other polymer materials, high decomposition temperature, decomposition to produce HCl, HCL can catalyze the dechlorination of CPE. Chlorinated polyethylene is a polymer materia
How Do You Operate and Maintain Plastic Injection Molds? -1
2022 / 10 / 29
When compared with other tools, the plastic injection mold is more complicated and precise, with higher requirements for operation and maintenance. As a result, throughout the entire production process, their correct use and meticulous mold maintenance are of great significance to maintain the normal production and improve the efficiency of a company. 1. Select the right molding equipment, and determine the reasonable process conditions. If the injection molding machine is too small, it will not meet the requirements; if too large, it will waste resources. Also, it may damage the mold or the mold plate due to the improper adjustment of the clamping force, while at the same time affecting the production efficiency. When selecting the injection molding machine, check the maximum injection volume, the effective distance of the tie rod, the mold installation dimensions on the plate, the maximum mold thickness, the minimum mold thickness, the plate stroke, the ejection type, the ejection stroke, the injection pressure, and the clamping force, etc. and choose the one that meets the requirements. The reasonable determination of the process conditions is also one of the factors that ensure the correct use of the mold. If the clamping force, the injection pressure, the injection speed and the mold temperature, etc. are set to be too high, the service life of the mold will be affected.
How Do You Operate and Maintain Plastic Injection Molds? -2
2022 / 10 / 29
3. When the mold is being used, a normal temperature should be maintained to help extend the service life of the mold. 4. Sliding parts on the mold, such as the guide pin, the return pin, the push rod and the core, etc., should be inspected, cleaned and lubricated regularly. Especially in summer when the temperature is high, add lubricants at least two times per shift, so as to ensure that these sliding parts are smooth enough to prevent seizures. 5. Each time before closing the mold, check whether the mold cavity is cleaned or not – no residual products or any other foreign objects are allowed. It is strictly forbidden to use hard tools to clean the cavity, so as to prevent the cavity surface from being damaged. 6. As for molds with special requirements for the cavity surface, the surface roughness (Ra) should be no higher than 0.2cm. It is absolutely not allowed to wipe it with hand or cotton fabrics. Instead, it should be cleaned with a compressed air blower, or gently wiped with high-grade alcohol napkins or absorbent cottons.
What's the Difference Between PVC and CPVC Pipe? -1
2022 / 10 / 29
PVC vs CPVC You`re probably familiar with PVC pipe. It's the white plastic pipe commonly used for plumbing and drainage. PVC stands for polyvinyl chloride, and it`s become a common replacement for metal piping. PVC`s strength, durability, easy installation, and low cost have made it one of the most widely used plastics in the world. PVC is a thermoplastic material that is molded into different shapes to create pipes, fittings, valves and other liquid handling supplies. Other Differences Between PVC & CPVC: There are a few other differences between the two materials. Most North American PVC pipe uses a Nominal Pipe Size (NPS), while CPVC is available in either NPS standard sizing -OR- CTS (Copper Tube Size) sizing. The copper tube sizing system is an entirely different sizing system from Nominal Pipe Size, and as the name implies it is the same system used for copper tube pipe.
What's the Difference Between PVC and CPVC Pipe? -2
2022 / 10 / 29
Applications of PVC & CPVC: As mentioned before, CPVC is more suitable for hot water applications up to 200F. PVC is still often used for unheated water as well as for vent and drainage systems; however, CPVC has become widely used for both hot and cold potable water. The more resistant properties of CPVC make it useful for commercial and industrial applications as well. Because of its wider range of applications, CPVC is usually pricier than PVC. That being said, it is still a very cost-effective and versatile material. We recommend the use of PVC for recreational use/building, cold water systems, vent systems, and drainage systems. CPVC is recommended for applications where the maximum temperature will exceed 140 degrees Fahrenheit, but stay under CPVC's max rating of 200 degrees Fahrenheit. Another deciding factor in which material to use is the chemical makeup of media being handled in your application. Though PVC and CPVC both are resistant to many of the same c
Ways to achieve flame retardancy
2022 / 10 / 29
Gas phase flame retardant mechanism. That is, it suppresses the freedom of chain growth in the combustion reaction and exerts a flame retardant effect. Condensed phase flame retardant mechanism. It prevents the thermal decomposition of the polymer in the solid phase and prevents the polymer from releasing combustible gas. Interrupt the heat exchanger management. That is, the heat generated by the polymer is taken away without being fed back to the polymer, so that the polymer no longer decomposes continuously. Novista Group supplies DBDPE, BDDP, FR245, TTBP,SR130 to global market.
2022 / 10 / 29
Aluminum hydroxide is one of the most widely used flame retardants. It is a non-toxic, white to light white powder with a relative density of 2.42 and a Mohs hardness of 3.0. When the temperature is heated to higher than 320°C, aluminum hydroxide loses 34.6% of its weight due to water loss. For polymers whose processing temperature is lower than the decomposition temperature of aluminum hydroxide (190~230℃), aluminum hydroxide is an excellent flame retardant material. It is worth noting that the size of the particle diameter has an effect on thermal stability. As a flame-retardant material, aluminum hydroxide is used in elastomers, thermosetting resins and thermoplastics. It is also used in large quantities in the production of flame-retardant carpets in styrene-butadiene latex, in the production of flame-retardant insulated rubber cables and thermal insulation foam , Conveyor belt and hose, etc. It can be used in all unsaturated resins, such as laminated large ceilings and walls, used in bathroom appliances, decorative wall panels, various covers, automobile protective covers, truck parts, etc., and electronic components including insulators and circuit boards. It also includes construction equipment and so on. Aluminum hydroxide is used in epoxy resins and phenolic resins, including adhesives, laminates, circuit boards, imitation marble and ceramic appliances.
The practical flame retardant technologies of silicon-containing compounds include:
2022 / 10 / 29
1. Introduce silicon atoms or silicon groups into the polymer through grafting reaction; 2. Add silicone powder; 3. Add high molecular weight silicone oil, organometallic compounds, and white carbon black; 4. Combined use of silicone rubber and metal compounds; 5. Polymer/clay nanocomposite materials; 6. Add main silicate; 7. Simultaneous use of silica gel and potassium carbonate;
What causes cracking in plastic injection molded parts?-2
2022 / 10 / 22
(5) It should be noted that amorphous resins, such as AS, ABS and PMMA, are more prone to residual stress than crystalline resins, such as PE and POM. During product ejection, stress is generated due to the high ejection force caused by the small draft angle, rough mold core / cavity. Sometimes, even ejector marks or cracking occurs around the ejector pin. Just look closely at the location of cracking to identify the cause. Stress is the most likely to occur when metal inserts are involved in the plastic injection molding process. And, the cracking usually occurs after a period of time, so it is extremely harmful. The stress is mainly caused by the large difference in thermal expansion coefficient between the metal and the resin materials. As time goes by, the stress exceeds the strength of the resin material that gradually deteriorates, so cracking occurs. In order to prevent the cracking thus caused, as a rule of thumb, the general-purpose PS is basically not suitable for inserts, while the impact of the inserts on the nylon material is minimal. Thanks to the small thermal expansion coefficient, the glass fiber reinforced resin is more suitable for the application of inserts.
What causes cracking in plastic injection molded parts? -1
2022 / 10 / 22
Cracking is a commonly seen defect in plastic injection molded products, of which the main causes are stress and deformation, mainly including residual stress, external stress and product deformation caused by external environment. (I) Cracking caused by residue stress The residual stress is mainly generated in the following three scenarios, i.e., overfilling, product ejection and metal inserts. The cracking generated in the case of overfilling can be solved from the following aspects: (1) Since the direct gate is able to minimize pressure loss, if cracking is mainly generated around the direct gate, you can opt for the multi-point gate, the side gate or the tab gate. (2) On condition that the resin material does not decompose or deter
Flame Retardants Are By Your Side
2022 / 10 / 22
In the 1950s, with the explosive development of materials technology, organic polymer materials began to be widely used in various fields of production and life. Plastics, rubber, textiles, and coatings with polymer materials as the main components have become our indispensable production elements. Electrical appliances, tableware, vehicles and other items made of polymer materials have brought great convenience to our lives while also bringing There are a lot of security risks. Due to the low oxygen index of polymer materials, air with an oxygen content of 21% is sufficient to meet the combustion conditions of most polymer materials. In addition, when polymer materials burn, they release smoke and toxic gases, which not only endanger human health, but also cause environmental pollution. In order to reduce the flammability of polymer materials and prevent fires, flame retardants have emerged. Flame retardants, as the name suggests, are additives that can be used to prevent the flammability of materials, that is, prevent materials from being ignited and inhibit flame propagation. There are many types of flame retardants, which can be roughly divided into organic flame retardants and inorganic flame retardants. Among them, organic flame retardants include halogen flame retardants, phosphorus-nitrogen flame retardants, organic phosphorus flame retardants, silicone flame retardants and the like. We select several types of flame retardant mechanisms to introduce.
5 Minutes To Understand Magnesium Hydroxide Flame Retardant
2022 / 10 / 22
Magnesium hydroxide is a new type of filled flame retardant. It releases bound water when it is thermally decomposed and absorbs a large amount of latent heat to reduce the surface temperature of the synthetic material it is filled in the flame. The generated combustible gas cools. Magnesium oxide produced by decomposition is a good refractory material and can also help improve the fire resistance of synthetic materials. At the same time, the water vapor it emits can also be used as a smoke suppressant. Magnesium hydroxide is recognized as an excellent flame retardant with three functions of flame retardancy, smoke suppression and filling in the rubber and plastic industry. It is widely used in polymer materials such as rubber, chemicals, building materials, plastics and electronics, unsaturated polyester, paints, and coatings. Especially for mine air duct coated cloth, PVC whole core conveyor belt, flame-retardant aluminum-plastic board, flame-retardant tarpaulin, PVC wire and cable material, mining cable sheath, cable accessories, flame retardant, smoke suppression and antistatic , Can replace aluminum hydroxide, has excellent flame retardant effect. Compared with similar inorganic flame retardants, magnesium hydroxide has better smoke suppression e
What Are The Applications Of Textile Flame Retardants In The Textile Industry
2022 / 10 / 22
Flame retardants, functional additives that endow flammable polymers with flame retardancy, are mainly designed for the flame retardancy of polymer materials; there are many types of flame retardants, which are divided into additive flame retardants and reactions according to the method of use Type flame retardant. The additive flame retardant is added to the polymer by mechanical mixing method to make the polymer flame retardant. At present, the additive flame retardant mainly includes organic flame retardant and inorganic flame retardant, halogen flame retardant (organic Chloride and organic bromide) and non-halogen. Organic is some flame retardants represented by bromine, phosphorus nitrogen, nitrogen and red phosphorus and compounds. Inorganic are mainly antimony trioxide, magnesium hydroxide, aluminum hydroxide, silicon and other flame retardant systems. Reactive flame retardants are used as a monomer to participate in the polymerization reaction, so the polymer itself contains flame retardant components. Its advantage is that it has less impact on the performance of polymer materials and has long-lasting flame retardancy. The types of textile fibers involve natural fibers
2022 / 10 / 15
Applications of CPVC1.CPVC pipe is used for transporting hot sewage, electroplating solution, thermochemical reagent and wet chlorine gas in chlor alkali plant. It can keep enough strength when the temperature is less than 100 ℃, and can be used for a long time under high internal pressure. The pipe made of CPVC has light weight, good heat insulation performance and no need of heat preservation.2.CPVC injection parts, such as pipe fittings, filter materials, dehydrators, wire ducts, conductor protective layer, electric switch, fuse cover, cable insulation material, etc.3. CPVC calendered sheet is used to manufacture chemical resistant and corrosion-resistant chemical equipment, such as reactors, valves, electrolyzers, etc.4.CPVC composites composed of CPVC and some inorganic or organic fibers have better impact resistance and heat resistance than those of other resins. They can be made into plates, pipes, corrugated plates and profiles.5. CPVC can be used to modify the fiber. The heat resistance of the product can be greatly improved by adding 30% CPVC in the spinning process. The shrinkage of the product can be reduced from 50% to less than 10%.6. The heat resistance of foaming CPVC is better than that of PVC. It can be used as thermal insulation material of hot water pipe and steam pipe7. Transparent CPVC can be used in automobiles, compact discs and audio-visual products. Common CPVC materials include CPVC resin, CPVC compound FOR more details. contact:mandyzhangz@novistagroup.com chemwf@gmail.com
2022 / 10 / 15
Characteristics of chlorinated polyvinyl chloride :1.The heat resistance is improved:CPVC is made of chlorinated PVC resin. Compared with PVC,chlorinity increases from 56.7% to 63%-69%,vicat softening temperature close to 100℃.2.Mechanical property is improved;strength of extension of CPVC increases by 50%compared with that of PVC, increases by one times compared withPPR resin.It meet the requirement of equipment and pipeline under high temperature.3.Chemical resistance is improved: under normal temperature or high temperature,it still has characteristics of acid resistance,alkali resistance,chemical resistance,it can substitutes for traditional materials for resisting corrodible substance,prolonging service life.4.Outstanding fire resistance,It has outstanding fire resistance and self-extinguishment,low heat conductivity coefficient.The heat-resistance pipe processed with CPVC has less heat loss,without thermal-protective coating.5.Bacteria is not easily to be bred.The completed CPVC pipe can not be decomposed under the influence of residual chlorne,the inner wall is smooth,so that bacteria is not easily to be bred,it has action of resisting general sterilization chemicals.
What Is The Right Size Pipe For Your Main Sewer Line? (Types And Repairs) - 1
2022 / 10 / 15
Are you asking yourself, what is the right size pipe for your main sewer line? Well, you`re in luck. In this article, you`ll learn everything you need to know about main sewer lines, including their size, different types, and different repair methods. What Is The Main Sewer Line? The main sewer line is the pipe that runs underneath your home. When you flush waste down your toilet, it travels through your drain pipes and connects to the main sewer line. From here, your waste is carried to the city sewer line underneath your street. If you have a private septic tank, your main sewer line carries your waste to your tank instead. What Is The Right Size Pipe For Your Main Sewer Line? Depending on your local plumbing codes, the main sewer line for residential homes is usually 4 inches in diameter. You may think if the pipe were larger, more waste could travel without getting clogged. But that`s not true. It`s not about size. It`s about water pressure. If the sewe
What Is The Right Size Pipe For Your Main Sewer Line? (Types And Repairs) - 2
2022 / 10 / 15
Terracotta (Clay) Pipes Terracotta pipes, also called vitrified clay pipes, are made of a clay-based ceramic. Their origin can be traced back to 4,000 BCE in Babylonia. That`s a long time! Modern clay pipes are air-dried for at least 24 hours before they are fired in a kiln for at least 50 hours. Clay pipes are: [Green" – Terracotta pipes are made using recycled clay, water, and other organic materials. There`s no plastic or metals. Unaffected by acids – Unlike cast-iron pipes, which are prone to corrosion, clay pipes are naturally resistant to acidic wastewater. On the downside, clay pipes are heavy, difficult to work with, hard to transport, susceptible to roots and leaks, and can crush easily. If your clay pipes start to fail, most plumbers will recommend replacing the entire sewer line rather than repairing a small section. Cast-iron Pipes Cast-iron pipes are made of a metal alloy containing iron, carbon, and silicone. Because cast-iron is not malleable, meaning it cannot be hammered or pressed into shape, the pipes are cast in a mold before they are installed. Cast-iron pipes are: Long-lasting – With proper care, cast-iron pi
What Is The Right Size Pipe For Your Main Sewer Line? (Types And Repairs) - 3
2022 / 10 / 15
Plastic (PVC and ABS) Pipes In the early 1970s, PVC (polyvinyl chloride) pipes became the most popular choice for drain and sewer pipes. Plastic sewer pipes are simple to install, cheap, and easy to transport. They fit together tighter, and tree roots rarely get into the joints. Another common type of plastic pipe is ABS (acrylonitrile butadiene styrene). These pipes look like regular PVC pipes, except they are black and slightly softer. ABS is stronger than PVC, but they still come with a few drawbacks. For example, ABS pipes are often not permitted by building codes because they used to be made with a recycled plastic resin that polluted the ground. ABS pipes can also warp and deform if they`re exposed to certain temperatures. How Do You Repair The Main Sewer Line? There are several ways to repair the main sewer line underneath your home. Two of the best solutions include pipe lining and pipe bursting. Pipe lining involves inserting an epoxy-impregnated liner into your old crumbling pipe. Then, the liner is inflated, creating a new pipe directly inside your old one. Pipe-bursting is a little different. Instead of inflating a new pipe inside your old one, a brand new pipe is pushed into your old one. Your old pipe is broken apart as the new pipe replaces it. (The End.)
What's the difference among PPAP, PAPP And DPP flame retardant?
2022 / 10 / 15
We believe that you have seen PPAP, PAPP and DPP in various websites and documents. Many people have only heard of Piperazine pyrophosphate. So which one is the abbreviation of Piperazine pyrophosphate? The answer is all. Just because there is no standard terminology, the name is different (the English abbreviations in many documents are inconsistent) Piperazine pyrophosphate, also known as polypiperazine phosphate, is a new type of environmental protection flame retardant, which combines acid source, gas source and carbon source, and has excellent charcoal-forming and flame retardant properties. Can be used in flame retardant polypropylene (PP), polyethylene (PE), acrylonitrile-butadiene-styrene (ABS), epoxy resin (EP) and polyurethane (PU) and other materials, is a halogen-free flame retardant with great development potential. When it comes to expandable flame retardant, it is necessary to talk about the expandable flame retardant composed of ammonium polyphosphate (APP) as an acid source.Compared with APP-based FR, the flame retardant effect of piperazine pyrophosphate system is better than that of ammonium polyphosphate complex system, and the heat stability is also higher. When it comes to PPAP flame retardant, Adeka is the most familar brand for most people. In China, there are not many factories to produce PPAP flame retardant, Shandong Novista Chemicals Co., Ltd (Novista Group) is the few one among them. Novista has PNPO-G1 and PNPO-G2 product which are based on Piperazine pyrophosphate, and are perfectly compatible for glass fibe
Flame Retardant Nylon Has A Long Way To Go
2022 / 10 / 15
Poly amide commonly known as nylon. Nylon is a thermoplastic engineering plastic containing amide bond (-NHCO-) in the molecular main chain. Since its introduction by DuPont Corporation in 1930, it has developed into a wide variety of engineering plastics in the world, and its total output ranks first in the world. The main varieties are: PA6, PA66, PA610, PA12, PA1010, PA43, etc. Among them, PA6 and PA66 are the most successful in commercial production and practical application. PA material vertical burning level reaches UL94 V-2, limit oxygen index is approximately 24%, self-extinguishing at room temperature, which means it has certain flame retardant performance. But with the expansion of the scope of application, like electronic appliances and building areas. The flame retardant performance put forward higher request for PA, the vertical level should be reach UL94 V-0, and LOI above 28%. The methods for preparing flame retardant polyamide: ① Using additive flame retardants. Flame retardant is added to polyamides by mechanical mixing to make them flame retardant. Adding certain proportion of APP/ talcum powder into PA6 can make PA reach UL94 V-0. The advantages of this method are easy to use and wide application. But it has a great impact on the performance of the polymer. The main additive flame retardants for polyamides are double loop octane (hexachlorocyclopentadiene) , ammonium polyphosphate, decabromodiphenylethane and so on. The use of additive flame reta
Development Trend Of Halogen-free Flame Retardant Nylon
2022 / 10 / 15
In any case, halogen-free flame-retardant Nylon is definitely the best choice in the future, halogen-free options mainly are red phosphorus, melamine Cyanurate and Aluminum Diethyl Phosphinate ADP. China is the world's largest phosphorus resource, so phosphorus has a huge cost advantage, high flame retardant efficiency, more widely used. Manufacturers of environmentally friendly flame retardants know that red phosphorus forms phosphoric acid after thermal decomposition. On the one hand, phosphoric acid as dehydrating agent promotes the formation of carbon.The formation of carbon reduces the heat transfer from flame to condensed phase. Phosphoric acid, on the other hand, can absorb heat by reducing the heating process by preventing CO oxidation to CO2. The flame retardant mechanism of endothermic and condensed phase was used. The color of red phosphorus limits it to dark Nylon products such as black or red, so melamine Cyanurate is generally used in light color or transparent Nylon. Melamine Cyanurate mainly include melamine cyanuric acid (MCA), melamine polyphosphate (MPP), etc., with low toxicity, low corrosion, high flame retardant efficiency, no conflict with additives and other advantages. When used alone in PA, it will reach UL94 V-0. After thermal decomposition of melamine Cyanurate, part of the heat is taken away, and the surface temperature of PA decreases. From t
2022 / 10 / 15
Chlorinated polyvinyl chloride(CPVC) is produced by chloridized with polyvinyl chloride(PVC) resin,it is deemed as a kind of new engineering plastic.The product is white or faint yellow powder or loosen granules which is tasteless,odourless,and nontoxic.After being chloridized,molecular chain of PVC resin irregularly increases,molecular chain increases,which increase the solubility of resin and chemical stability,so as to improve the heat resistance,acid resistance,alkali resistance,salt resistance,oxidzing agent resistance and other corrosion resistances. PVC Impact Modifier PVC Additives PVC Processing Aid Acrylic Impact Modifier Acrylic Processing Aid PVC Heat Stabilizer PVC Lubricant CPVC Compound CPVC Additives
What Is The Trend Of Halogen-free Flame Retardants For Polyamide?
2022 / 09 / 24
Polyamide halogen-free flame retardants are definitely the best choice in the future, and the main choices are red phosphorus and melamine salts. China is the world's largest country of phosphorus resources, so red phosphorus has a huge cost advantage. Red phosphorus has high flame retardant efficiency and is widely used. Manufacturers of environmentally friendly flame retardants know that red phosphorus is thermally decomposed to form phosphoric acid. On the one hand, phosphoric acid acts as a dehydrating agent to promote the formation of carbon. The formation of carbon reduces the heat transfer from the flame to the condensed phase; on the other hand, phosphoric acid can absorb heat because it prevents the oxidation of CO to CO2 and reduces the heating process. Use endothermic and condensed phase flame retardant mechanism for flame retardant. However, the 2010 Panasonic incident make people worry about the security of red phosphorus flame retardants, because red phosphorus will cause certain potential safety hazards to the performance of the product. On the other hand, the color of red phosphorus also limits it to dark polyamide products such as black or red. Therefore, melamine salt is generally used for light-colored or transparent halogen-free flame-retardant polyamide. Melamine salts mainly include melamine cyanurate (MCA), melamine polyphosphoric acid (MMP), etc., which have the advantages of low toxicity, low corrosion, high flame retardant efficiency, and n
What Are The Main Components Of Flame Retardants?
2022 / 09 / 24
There are many types of flame retardants, and the general development can be divided into two categories: organic flame retardants and inorganic flame retardants according to composition analysis. One of the organic flame retardants mainly includes halogen flame retardants, phosphorus-nitrogen flame retardants, organic phosphorus flame retardants, and silicone flame retardants. We select several types of questions for technical introduction on the research of flame retardant mechanism of flame retardant. Halogen-based flame retardants are an important component of organic flame retardants, and their main components are halogen-based organic compounds. The free radicals generated by polymer degradation at high temperatures are the factors that maintain the combustion of organic compounds, while the hydrogen halide gas generated during the thermal decomposition of halogen flame retardants can capture free radicals, thereby preventing the flame from spreading. In addition, hydrogen halide itself cannot burn and is denser than air. It forms a gas barrier on the surface of the polymer material, which prevents the polymer material from contacting oxygen. Phosphorus nitrogen flame retardants are mainly composed of phosphorus and nitrogen. These flame retardants are also called intumescent flame retardants, because when they are heated, they can produce a uniform layer of carbon foam on the surface of the flame retardant, which acts as a heat and oxygen barrier. Intumescent flame retardant systems generally consist of an acid source (dehydrating agent), a carbon source (carbonizing agent) and a gas source (nitrogen source, blowing agent). After heating, the esterified polyol and inorganic acid, which can be used as a dehy
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Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.