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Production methods of brominated flame retardants and others
2022 / 03 / 19
Preparation of brominated flame retardant (39568-99-5): 2,3,5,6-tetrabromo-p-xylene was synthesized by reaction of p-xylene with Br2 catalyzed by AlCl3, and the product was replaced by a-H. 1. Synthesis of tetrabromo-p-xylene: 1000kg bromine and 3kg anhydrous AlBr3 were added into the reactor in turn. Cooling with ice brine to 0-3 C, slowly adding 80 kg xylene under stirring. When the bulk or viscosity is too high in the reactor, the temperature can be controlled at 30-35 C by adding 450kg bromine dilution. The mass disappeared and then cooled to 10-15 (?) C. The remaining dimethylbenzene was added and reacted at 20 (?) C for 4-6 H. Excess bromine was evaporated. Put the reaction liquid into the centrifuge to filter and dry. Recrystallization with methanol, melting point 253 - 254 C. 2. Synthesis of hexabromo-p-xylene: 80 kg of carbon tetrachloride was added to the reactor and 42 kg of tetrabromo-p-xylene was added under stirring. Under the protection of N2, carbon tetrachloride solution of bromine (32 kg bromine dissolved in 50 L carbon tetrachloride) was slowly added and heated for 15 hours. Then it is cooled to about 3 degrees Celsius. A, a', 2, 3, 5, 6-hexabromo-p-xylene was obtained by centrifugal filtration and drying. Product Specification: Indicator Name Indicator Appearance White Crystallization Melting Point /~272.5~273.5 Bromine Content /%>81 Novista Group supplies DBDPE, BDDP, FR245, SR130 to global market.
What are the reasons why flame-retardant PP is used in the socket housing
2022 / 03 / 19
Currently, some switchboard enclosures are made of PC and ABS materials, but some are gradually replacing PC and ABS materials with flame-retardant PP. why? Let us see why: 1, flame retardant PP is usually cheaper than ABS and PC materials, so many manufacturers choose flame retardant PP for cost reasons. .. 2. Flame-retardant PP is considered as a safe housing material in household sockets. It can increase the flame-retardant temperature from 650 to 750, and the safety factor has been improved. 3. Due to the addition of an appropriate amount of halogen-free flame retardant to the PP material, there is a flame retardant PP (also called halogen-free flame-retardant PP), and halogen-free flame-retardant PP is used inside the socket shell. Some of them can be extinguished immediately after ignition. In addition, since no irritating gases are released during the combustion process, halogen-free flame retardants are more environmentally friendly than halogenated flame retardants. The halogen-free type of Guangzhou Yinsu Flame Retardant New Material Co., Ltd. can also be provided. Have. 4. Among ordinary plastics, PP material has high heat resistance and can be used stably for a long time in a high temperature environment of 100 degrees or higher. In all cases of PA, PE and flame retardant PP, flame retardants are added to improve flame retardancy, so flame retardants are added to PA and PE. Based on suitable products of halogen-free flame-retardant PP, we can also provide customers with customized flame-retardant solutions. Novista Group supplies equivalent of FP-2100JC, FP-2200S, FP-2500S, Exolit OP1230, OP930, OP1312, OP1314 to global market.
What is acrylic processing aids and their funcations?
2022 / 03 / 12
What is acrylic processing aids and their funcations? ACR processing aids is a copolymer of methyl methacrylate, acrylate and styrene. Besides used as processing aids, it also be used as impact modifier. Main Functions: 1. It has good compatibility and dispersion with PVC,can promote PVC melt and plasticization, effectively reduces the melting temperature of PVC, and improves the weatherability of products. 2. It can change the melt rheological behavior of PVC materials and improve the fluidity of PVC materials, thus making it easier to extrude or inject 3. It can improve the strength of PVC melt materials, avoid pvc melt rupture, solve surface problems such as shark skin, and improve the intrinsic quality and surface gloss of products. 4. It can effectively prevent pressure fluctuation and flow scars caused by extrusion and injection molding, and effectively avoid surface problems such as ripple and zebra line. 5. It can improve the surface gloss of the products, because the plasticization is uniform, at the same time it can help to improve the mechanical properties of the products, such as tensile strength, impact strength and elongation at break. 6. It can significantly reduce the deposition of various additives such as stabilizers, pigments and calcium powder on the surface of PVC products. 7.Foaming regulator can effectively adjust the density and size of the cell, greatly increase the strength of PVC melt materials, thus effectively wrap the foaming gas, form a uniform honeycomb structure, prevent gas escaping, and reduce the density of products. 8. Good metal peeling property, because it belongs to macromolecule materials, will not cause precipitation
Why we use fillers on plastics?
2022 / 03 / 12
Why we use fillers on plastics? The main purpose of adding fillers to plastics: 1. Improving the processing and material properties of plastics: for example, improving the dimensional stability, heat resistance, hardness, weatherability, flame retardancy, aesthetics,fluidity, strength and stiffness of products. 2.Reduce cost Compared with pure plastics, the price of filler is generally very low. Adding filler can greatly reduce the cost of plastics products. Fillers are divided into two main categories 1,A kind of
What is mainly formulation components for UPVC pipe?
2022 / 03 / 12
What is mainly formulation components for UPVC pipe? UPVC pipe, also known as rigid PVC pipe, isan amorphous thermoplastic vinyl chloride resin by adding certain additives(such as stabilizers, lubricants, fillers, modifiers, etc.) through extruder processing get to plasic pipe Formulation components 1.PVC resin In order to obtain rapid and uniformplasticization, should use suspension method loosen pvc resin. K value of theresin is 66-68. 2.PVC stabilizer Commonly used lead-based one pack stabilizers,calciu
2022 / 03 / 12
In the 21st century, polymers and their derivatives are ubiquitous in our daily lives. In particular, some composite materials have gradually replaced the wide application of steel and aluminum alloys in the past few decades. Composite materials are generally composed of glass fiber, carbon, aramid or natural fiber reinforced organic polymer matrix. It is understood that the output of glass fiber reinforced plastics in Europe in 2009 reached 815,000 tons. Epoxy polymers for electrical and electronic (EE) applications account for approximately 12% of the glass fiber reinforced plastics market, and this is also one of the main applications of epoxy resin composites. In the printed circuit board (PCB), 80% of the composite material is rated as FR-4 by the National Electrical Manufacturers Association (NEMA). FR-4 is a glass fiber reinforced epoxy resin laminate that meets the required flame retardant standards (ie UL 94-V0). We know that in the flame cycle, there are different ways to reduce the occurrence and damage of fire (the red mark in the figure represents the main way of extinguishing fire), and the most effective way is to improve the fire resistance of the cured resin by adding flame retardants. Currently, halogenated flame retardants are still the majority of the flame retardant market for EE applications. However, with the implementation of new environmental regulations (such as REACH, WEEE and RoHS), some bromides will gradually be phased out, and most of the development of halogen-free flame reta
2022 / 03 / 12
1. Non-combustible means that the substance itself cannot be burned, and flame-retardant means that it has no burning ability or is not easy to burn. 2. Flame retardant can sometimes be close to or in contact with fire sources, such as asbestos flame retardant, and gasoline needs to be fire resistant. Flame retardant can also be understood as fire resistance, which is different from non-combustible. Non-combustible means that the substance is non-combustible, not non-combustible. 3. Not all flame retardant materials are combustible and combustible materials. Flame retardants are mainly organic and inorganic, halogen and non-halogen. Organic is some flame retardants represented by bromine, nitrogen, red phosphorus and compounds. Inorganic are mainly antimony trioxide, magnesium hydroxide, aluminum hydroxide, silicon and other flame retardant systems.
Flame-retardant reaction mechanism of polymer materials
2022 / 03 / 12
1. Endothermic effect The heat released during the combustion process heats the raw material, making it quickly reach the ignition point. The principle of endothermic flame retardancy is that the material needs to absorb a large amount of heat during the combustion process, which can reduce the heating process of the material. It is difficult for the free radicals cracked by the converted combustible molecules to reach the ignition point, which inhibits the progress of combustion to a certain extent. 2. The high temperature generated when the covering material burns makes the flame retardant form a glassy or stable foam covering layer to isolate oxygen, so that it not only insulates and insulates oxygen, but also prevents the escape of combustible gas, so as to achieve the purpose of flame retardancy. 3. Inhibition of chain reaction According to the chain reaction theory of combustion, free radicals are needed to maintain combustion. Flame retardants can act on the gas phase combustion zone to capture free radicals in the combustion reaction, thereby preventing the spread of flames, reducing the flame density in the combustion zone, and ultimately reducing the combustion reaction speed until it stops.
PVC Heat stabilizers for medical applications-1
2022 / 03 / 10
The pandemic of 2020 has changed the world in many ways like never before. But there is a silver lining. Plastics have gained great respect in society in general thanks to the contribution of PPE kits and medical devices in the fight against Covid-19. Plastic has been the undoubted hero in this battle that protected frontline workers as a shield and helped to cure patients in the form of medical devices.Among all the plastics, Polyvinyl Chloride (PVC) is used in medical applications widely due to the unique combination of properties. PVC is an `additive friendly` polymer, and with the help of various additives, it can be made either flexible or rigid, transparent, opaque or translucent. Other than these physical properties PVC is durable, biocompatible and resistant to harsh chemicals. These properties may seem obvious at first glance, but it sets PVC apart from other materials if we look at it closely. For example, glass is very good for chemical resistivity and biocompatibility but there`s a limitation due to the rigid and brittle nature of glass. It can`t be used for all applications and careful handling is required. Whereas, PVC can replace glass in many applications as it not only provides required biocompatibility and chemical resistance but also the toughness of material in terms of mechanical properties allows it to be used with little care. Similarly, PVC also gives an advantage over metal as it doesn`t corrode and has great chemical resistance. Hence lipids, alcohol, acids and bases can be stored safely in a PVC container.
PVC Heat stabilizers for medical applications-2
2022 / 03 / 10
Single-use medical applications of PVC like gloves, masks, sterile syringes, blood bags, IV bags, tablet packaging, are a game-changer. Sanitization is a constant challenge in front of medical workers and historically multi-use medical devices were the main reason behind infections due to cross contaminations. Moreover, traditional sterilization facilities such as the use of ethylene dioxide, steam and autoclave were time-consuming. Whereas, new age sterilization techniques like gamma rays are very well suited for polymer-based medical equipment and these devices can be sealed or made `ready for use' in a very short time. PVC and its additives used in medical applications fulfill all the requirements of safety during the working period and retain the properties of the compound even after modern sterilization techniques.Since PVC is not stable when it is exposed to heat, the performance of PVC is largely dependent on the additives especially heat stabilizers. In the case of manufacturing medical devices, non-toxic and eco-friendly heat stabilizers are the natural choice of processors. These stabilizers are also expected to provide final products high degree of clarity, good mechanical properties and excellent chemical resistance.Generally, for transparent applications Calcium and Zinc based stabilizers are recommended to use.Calcium Stearate and Zinc Stearate are the core stabilizing agents which are manufactured using plant-based stearic acid, calcium hydroxide and zinc oxide. Both of these ingredients can be used for food contact applications safely. But since these grades are to be used for medical applications, all raw materials used
PVC Heat stabilizers for medical applications-3
2022 / 03 / 10
The inorganic stabilizers are mainly acid scavengers that restrict the release of toxic gases such as hydrochloric acid and organic co-stabilizers are used to improve the color hold and UV stability of the final product. Along with these stabilizers, many processors also use Epoxidized Soya-Bean Oil (ESBO) in the flexible compounds to improve heat stability and UV resistance of the final article. ESBO is also a bio-based product and can be used safely in all food contact or insertable parts of devices such as tubes.Moreover, PVC is being used in hospitals in the form of floorings and wall claddings in hygienic rooms. Hygienic surfaces need to be cleaned with various cleaning agents and due to chemical resistance PVC claddings are preferred. The added advantages such as durability, low maintenance cost, and acoustic properties in the material, PVC is preferred by modern health care architects for the interior design of the hospitals. For such rigid applications, internal and external lubricants are also used in combination with the stabilizers to make processing easy.The use of PVC and Ca-Zn based stabilizers is a sustainable solution. All single-use and multi-use articles can be recycled. Most material is transparent and made with premium grades of additives. Hence, once sterilized it can be sold at a very good price to the recyclers. Secondly, in many other transparent applications, methyl tin stabilizers are used which are not compatible with Lead-based stabilizers. Since Ca/Zn stabilizers are primarily used in medical applications the material to be recycled can be used in any system as Ca/Zn based stabilizers are compatible with all ingredients.NOVISTA Calcium-Zinc stabilizers are performance-oriented
Functions and Dosage of various PVC Lubricants-1
2022 / 03 / 05
Lubricant is one of the most essential additives after heat stabilizer yet most difficult to adjust for the processing of rigid PVC. PVC requires various additives to prevent PVC from degrading when heated and sheared and get the desired and perfect articles. Lubricant reduces various types of frictions within the polymer matrix and between the polymer matrix and processing equipment. It influences the viscosity and flow behavior of PVC compositions under the heat and shear experienced in the processing machinery so that the processing is made easier and smooth. The rheology of PVC is adjusted with the help of various lubricants depending upon the process and application. Goldstab uses these lubricants in the manufacturing of One Pack Stabilizers and adjusts the lubrication required according to the application. There are a wide variety of lubricants used for processing PVC, each having its unique motive A. External Lubricant – Paraffin wax, Polyethylene wax, Fischer-Tropsch wax B. Internal Lubricant – Oxidised Polyethylene wax, Ester wax A. External Lubricant External Lubricant is responsible to reduce friction between PVC melt and the metal surface of machinery. It provides operational benefits of easier movement of the stock through the machinery and prevention of its adhesion to the hot metal that would quickly result in the local formation of stagnant layers and their burning. It increases the fusion time and stability of PVC and delays gelation. It also provides an additional feature of gloss to the end product. 1. Paraffin Wax Paraffin wax is the most prevalent external lubricant used for U-PVC applications such as pipes and fittings. It is derived from petroleum refining and has a dropping point between 55-75°C. These long branched chain wax segments tend to form crystallites at the surface of U-PVC melt and form a layer between metal surface a
Functions and Dosage of various PVC Lubricants-2
2022 / 03 / 05
3. Fischer Tropsch Wax Fischer Tropsch synthetic wax has a linear structure which gives high-temperature resistance, lower viscosity and softening points between 65-105°C. It increases the fusion time and stability of PVC while decreasing the fusion torque required for the processing of PVC. Its linear structure provides an excellent metal release effect and reducing the formation of hot spots resulting in thermal degradation, which further reduces scrap. Due to its low viscosity, the speed of production increases and also improves the gloss. As compared to PE and paraffin waxes, the dosage of FT wax required is less. This makes FT wax an excellent external lubricant for use during PVC processing. B. Internal Lubricant Internal lubricant promotes inter-molecular flow via chain slippage and decreases the melt viscosity. It reduces the friction between the particles before the melting of PVC, which reduces shear burn-in injection moulding. It reduces back pressure in extrusion and allows easier, faster and better mould filling (including reduced tendency to sink marks, better part-size control and surface finish). It improves the dispersion of fillers, eliminates crease whitening and imparts good clarity. 1. Oxidized PE wax The chain ends of the low molecular weight PE waxes are oxidized to acid groups under controlled conditions and are called oxidized polythene waxes. This improves the solubility parameter of PE wax. OPE wax is multifunctional, it acts as both internal as well as external lubricant. It is useful in filler treatment and dispersion of colorants in PVC processing and masterbatches. It gives the product good transparency and gloss. The general dosage for OPE wax is 0.1-1.0 PHR. 2. Ester wax Ester waxes are multifunctional, i.e. these are lubricating and moderately co-stabilizing. Being of the same family, these are highly compa
Functions and Dosage of various PVC Lubricants-3
2022 / 03 / 05
It is desirable to know how important lubricants are, but it is critical to know how much to use Under lubrication or over lubrication affect the processing as well as product quality. Under lubrication will result in frictional heat and degradation of PVC or poor fusion with loss of mechanical properties. Over lubrication is a problem that results in scorching, low output, surging, poor impact strength, poor weld lines and poor surface properties. When the amount of external lubricants is low, there is an adhesion phenomenon, and the plasticizing time is short. Excessive external lubricants lead to mechanical properties decrease, and there may be precipitation phenomenon. When the amount of internal lubricants is low, the plasticizing torque is larger, the plasticizing time is longer. If internal lubricants are excessive, the plasticizing time is shorter, the plasticizing torque is smaller, the time of thermal stability is shorter, the inner wall of the product is not smooth. The PVC Industry has a vast application of waxes. In addition to reducing friction and balancing rheology, lubricants also behave as mechanical stabilizers and pseudo plasticizers. A minor quantity provides a substantial decrease in resistance of chains or chain segments, to movement concerning other polymer chains, or concerning objects in their vicinity. Changes in any material or any piece of equipment in manufacturing result in a need for lubricant adjustment. A lubricant package designed for low heat - high shear machine may fail dramatically in high heat- low shear machine. Processing of rigid PVC is incomplete without waxes. New lubricants should first be evaluated in the laboratory at different levels, temperatures and shear rates and their operating range are determined. No single laboratory test has demonstrated a complete correlation with the production machinery. But a series of tests help to eliminate mat
Why is flame retardant modification so complicated?
2022 / 03 / 05
Many customers will ask: Why is flame retardant modification so complicated? The following will tell you the complexity of flame retardant modification due to various reasons. First, the combustion process is complex Combustion has three conditions: combustible, combustion-supporting, and reaching the ignition point. Since combustibles have various phases (gaseous, liquid, solid, liquid with different vapor pressures, solids have compactness and looseness), the concentration and diffusion of the accelerant, and the high and low ignition points, the combustion process is very complicated. There are open and smoldering fires involved. In addition, the spread of fire is also a part of burning. Therefore, there are also many burning test modes, such as vertical burning, horizontal burning, glow-wire test, etc. Second, the results and hazards of combustion are complex Combustion produces burnout, high temperature damage, smoke impeding escape, and smoke poisoning. Third, the flame retardant mechanism is complex First, it involves gas phase flame retardant and condensed phase flame retarda
2022 / 03 / 05
A smoldering cigarette could turn an apartment without flame retardant protection into an inferno in less than 3 minutes. However, if the chair, bedding, or carpet where the cigarette lay, had flame retardant, the fire might never have started. And if a fire did start, the flame retardants would have reduced the heat and spread of the fire, taking 10-15 minutes to be deadly. Flame retardants provide time: time to leave in safety. It's been proven many times that flame retardants save lives. Here are a couple excerpts from the video below asking "Do Flame Retardants Work?" produced by American Chemistry. "There's plenty of evidence that flame retardants work. There have been numerous studies that have concluded that when you put the right amount of the right type of flame retardant with the right material, they make a massive difference in terms of heat release, which is the principal property of a fire. A study at the National Bureau of Standards comparing products treated with flame retardants, against those that were not treated, found a significant increase in the amount of time for escape and rescue." - Marco Hirshler, President & Technical Director, GBH International "A recent Air France flight that crashed, off the runway in Paris, 353 people aboard. the plane was completely destroyed by fire, but all 353 passengers were able to get off unhurt, because the interior of the plane was heavily flame retarded, which gave them time for escape."
Do flame retardants actually stop the spread of fires?
2022 / 03 / 05
To answer that question, let`s use flame retardant furniture as an example. The number of upholstered furniture fires in the home environment dropped by 84 percent from 1980, the first year that data were available, to 2009, according to NFPA. While several factors have contributed to that sharp decline, the timeframe coincides with the use of flame retardants to meet flammability standards imposed in California in 1976. In the absence of a national requirement, the California standards were broadly followed by the US furniture industry over the following 20 years. Similar findings have been reported in the United Kingdom where flammability standards also are in place for furniture. Despite this substantial progress, upholstered furniture remains a significant contributor to home fire deaths, according to NFPA. During the period from 2005 to 2009, while upholstered furniture was the item first ignited in 2 percent of reported home fires, these fires resulted in 19 percent of the home fire deaths. Looking at U.S. home fires that originated with upholstered furniture between 2005 and 2009, the NFPA reports, [Together, candles, matches and lighters were involved in 21 percent of the fires and 12 percent of the deaths.
Introduction to chlorinated polyethylene
2022 / 03 / 04
1) CPE is a saturated rubber, which has excellent resistance to heat and oxygen aging, ozone aging, acid and alkali resistance, and chemicals.2) CPE has excellent oil resistance. Among them, it has excellent resistance to ASTM No. 1 oil and ASTM No. 2 oil, which is equivalent to NBR; and it has excellent resistance to ASTM No. 3 oil, which is better than CR and is equivalent to CSM.3) CPE contains chlorine element, has excellent flame retardant properties, and has the characteristics of burning and dripping. It can be combined with antimony flame retardant, chlorinated paraffin, and Al(OH)3 in an appropriate ratio to obtain a flame retardant material with excellent flame retardancy and low cost.4) CPE is non-toxic, does not contain heavy metals and PAHS, and it fully meets environmental protection requirements.5) CPE has high filling performance and can produce products that meet various performance requirements. The processing performance of CPE is good, and the Mooney viscosity (ML121 1 4) is available in a variety of grades between 50-100.The main purposeAt the end of the 1990s, the domestic demand for high-performance flame-retardant rubber increased, especially the development of the wire and cable industry and auto parts manufacturing industry, which drove the consumer demand for rubber-based CPE. Rubber CPE is a special synthetic rubber with excellent comprehensive performance, heat-resistant oxygen ozone aging, and good flame retardancy. Mainly used in: 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.
Common problems of PVC foaming regulator
2022 / 03 / 04
PVC foaming regulator is actually an acrylate processing aid. It has all the basic characteristics of PVC processing aids. The only difference from PVC general processing aids is the molecular weight. The molecular weight of PVC foaming regulators is much higher than General purpose processing aids. In the process of PVC foam sheet extrusion, the problems encountered can basically be classified into 4 categories, one is stability problem; the other is melt strength problem; third is lubrication problem; fourth is dispersion problem. These four types of problems, especially the first three types of problems, will restrict each other and have cross-effects. From the surface, it is sometimes difficult to distinguish them immediately. It is necessary to observe and analyze them to find the root of the problem to solve the problem. Insufficient stability will affect the entire board surface, the board surface will turn yellow, and the foam sheet will be brittle. Insufficient melt strength will cause the foamed sheet to have large cells and long vertical sections. The most direct way to judge whether the melt strength is insufficient is to press the sheet wrapped on the middle roll with your fingers behind the three rolls. When the melt strength is good, you can feel elasticity when pressed. If it is difficult to bounce up after pressing, it indicates that the melt strength is poor. Because the screw structure and cooling method are quite different, it is difficult to judge whether the temperature is reasonable or not. Generally speaking, within the allowable load of the extruder, the temperature in zone 3 to 5 is better. In order to obtain uniform foam products in the foamed pipe, it is also necessary to ensure that the PVC material has good melt strength. The foaming additives developed by the company are developed to solve this problem of foamed products and can effectively improve the quality of foamed pipes. Poor dispersion will cau
The effect of the amount of PVC foaming regulator on the product
2022 / 03 / 04
As the main material of PVC foaming regulator, many users are still unfamiliar with its production materials, especially the amount of product. What everyone does not know is that the control of the amount of PVC foaming regulator Use has a certain impact, so in order to ensure the use of efficiency, we need to have a specific understanding of its impact.The PVC foaming regulator manufacturer said that the amount of PVC foaming regulator has a very obvious impact on the product. We all know that PVC foaming regulator can shorten the production time of the product. This It also makes the use of too much PVC foaming regulator may cause the performance of the product to decrease, such as the product's hardness is too low.PVC foaming regulator manufacturers tell us that if the amount of PVC foaming regulator is too small, then the performance of the product will not be changed too much, but if too much PVC foaming regulator is used, it will also cause PVC foaming. There is a problem with the regulator, so we must control the amount of PVC foam regulator. , The above is about the influence of the amount of PVC foaming regulator, so in order to better display the product performance, we need to adjust the PVC foaming regulator according to the specified requirements to avoid adding errors and reducing the use efficiency.
2022 / 02 / 26
Suitable for concentrated masterbatch, polypropylene masterbatch, additive masterbatch, filling masterbatch and other pigments or filler dispersant, lubricant, brightener, coupling agent. Rubber and plastic processing lubricant, remover and solvent, OPE wax, all kinds of rubber and good intermiscibility, due to its high melting point and low viscosity, good prompted the resin flow, relative to reduce resin hybrid power consumption, to reduce the mold and the resin adhesion, easy to take off the membrane, internal and external lubrication role, at the same time has good antistatic property. As a water-based coating and ink anti - adhesion additives and anti - friction additives. As a viscosity regulator of thermal sol. As aluminum foil compound paper processing AIDS. For shoe polish, floor wax, wax polish, car wax, cosmetics, matches wax rod, wear-resisting agent of printing ink, ceramics, precision casting, oil absorbent, sealing daub, traditional Chinese medicine (TCM) wax pill, hot melt adhesives, cable feed additive, oil well paraffin remover, crayon, carbon paper, waxed paper, inkpad, photographic materials, textile softener, matrix electronics sealant, transistor packet agent, rubber processing aid , automobile bottom oil, dental material processing AIDS, steel rust inhibitor, etc. Uses: Widely used in water-ba
PVC Processing Additives Selection Principle
2022 / 02 / 26
PVC processing auxiliaries are a kind of auxiliaries which can improve the processing properties of resins. The ductility of POLYvinyl chloride melt is poor, which leads to melt breakage easily. Polyvinyl chloride melt relaxation is slow, easy to lead to rough surface, matt and "shark skin". Therefore, polyvinyl chloride processing often need to add processing AIDS to improve its melt defects. The use of notes: Polyvinyl chloride mixtures are usually processed with a variety of processing AIDS. Different types of processing AIDS can be used together to achieve better processing performance. For example, lubrication processing AIDS such as QL-175 are usually used together with other types of processing AIDS such as QL-921, QL-930 or QL-530, which can be used in the production of blow molded containers, calendring or extrusion sheet, wall panels, profile extrusion, high flow injection molding parts, pipe fittings, pipe wrapping and many other aspects. The balance between rheological properties of melt, homogeneity of melt and thermal demoulding properties of metal not only affects the appearance quality, but also affects the production efficiency. Whether the dosage of each component is appropriate is very important, it will affect the quality of the product, transportation and storage must be moisture-proof, sun protection and anti-fouling. PVC processing AIDS to promote plasticizing, lubricity. Widely used in, PVC doors and Windows, pipes, pipe fittings, decorative board, foam board, sheet, film, wood plastic transparent plastic and other hard products processing.
How to deal with the burst of PVC pipe fittings
2022 / 02 / 26
How to deal with the burst of PVC pipe fittings PVC pipes can be seen everywhere in life, mainly because they are relatively light and easy to install and repair. Even if the household pipe is broken, you can repair it yourself. So what should I do if the PVC pipe fittings burst? Treatment method after bursting of PVC pipe fittings: 1. The number of leaks after the water pipe bursts is generally directly related to the water pressure in the pipe. Regardless of whether the water is dripping or gushing out, what you should do at this time is to immediately close the valve of the water supply pipe and report to the local property department for repair. 2. Bundle the damaged part of the water pipe with the special tape for repairing the water pipe. 3. In addition, it is also possible to repair cracks in water pipes with glass fiber tape or ring air resin adhesive. 4. If the water pipe burst is serious, you can wrap the broken part of the water pipe with a towel, which can prevent the water from radiating everywhere, and can also introduce the water into the placed bucket, so that the PVC pipe manufacturer will avoid huge waste. At the same time, the valve of the main water pipe in the household can be closed, and the tap water supply in the house can be completely intercepted. 5. If the cause of the pipe burst is that the pipe is too old, you should find a plumber to stop the inspection and repair it in time.
Flame Retardants application in Plastic Composites
2022 / 02 / 26
At present, domestic research and development focus on inorganic flame retardants, red phosphorus microencapsulation, intumescent flame retardants and other fields. Composite materials based on resin and rubber contain a large amount of organic compounds and have certain flammability. Flame retardants are a class of additives that prevent the ignition of polymeric materials or inhibit the propagation of flames. The most commonly used and most important flame retardants are compounds of phosphorus, bromine, chlorine, antimony and aluminum. Flame retardants can be divided into two categories: additive type and reactive type according to the method of use. Additive flame retardants mainly include phosphate esters, halogenated hydrocarbons and antimony oxides, etc. They are blended into the composite material during the processing of the composite material. Reactive flame retardant is added to the polymerization system as a monomer raw material in the process of polymer preparation, so that it can be compounded to the polymer molecular chain through chemical reaction, so it has little effect on the performance of the composite material and has long-lasting flame retardancy. . Reactive flame retardants mainly include phosphorus-containing polyols and halogenated acid anhydrides. Flame retardants for composites should have the following properties: ①High flame retardant efficiency, which can endow the composite material with good self-extinguishing or flame retardancy;
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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
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