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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 t
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 deat
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 purpose At 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. appear. for more details pls contact: mandy, 86 13563682728
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;
Method of preparing flame retardant PP with magnesium hydroxide as flame retardant
2022 / 02 / 26
Polypropylene (PP) has been widely used in many industries for its outstanding advantages of low density, good mechanical properties, chemical corrosion resistance, easy processing, high heat resistance and deformation temperature, and low price. Flame retardant PP has become the largest flame retardant dose, the fastest growing polymer flame retardant materials. Magnesium hydroxide [Mg (OH) 2] as a kind of halogen-free flame retardant, besides can flame retardant and smoke elimination performance, and dehydration temperature is high, more suitable for PP, such as polymer flame retardant modification of processing temperature is higher, in reducing the harm to environment and processing in the material can meet the requirements of relevant laws and regulations, but also make the fire retardant plastic easier to recycle. In particular, Mg(OH)2 is rich in raw materials and low in price. It has high economic benefits as a flame retardant of PP. Therefore, Mg(OH)2 flame retardant PP is attached great importance to throughout the country in recent years. However, when most enterprises use Mg(OH)2 flame retardant PP, due to insufficient Mg(OH)2 dosage, other flame retardants need to be added, resulting in high formula cost. Therefore, the author talks about some matters that should be paid attention to when Mg(OH)2 is used as PP flame retardant. When using Mg(OH)2 flame retardant PP, in order to make the material reach ul94V-0 flame retardant grade (3.2mm sample), the dosage should be ≥60%, however, if using Mg(OH)2 smoke suppression, the dosage can be lower, the smoke density of PP containing 40%Mg(OH)2 is only about 1/3 of that of non-flame retardant PP. When Mg(OH)2 content in PP reaches 65, its mechanical properties
2022 / 02 / 26
The invention relates to the technical field of new energy vehicles, in particular to an engineering plastic for pressing strips of power battery modules of new energy electric vehicles, which is prepared from the following raw materials in parts by weight, PC resin 40% - 70%; Enhancer 3% ‑ 10%; Flame retardant 10% - 15%; Anti dripping agent 0.3% ‑ 2%; Antioxidant 0.1% ‑ 0.5%; Toughening agent 3% ‑ 7%; Lubricant 0.5% ‑ 1%; ABS resin 10% ‑ 25%. The material of the invention has excellent comprehensive performance, balance of rigidity and toughness, excellent flame retardant performance and high dimensional stability, and is especially suitable for extrusion molding. The extruded power battery module strip of the material meets the requirements in all aspects, successfully solves the problem of lightening the new energy electric vehicle by replacing steel with plastic, and makes it possible for the engineering plastic strip to replace the original aluminum alloy metal strip, It brings a new direction for the lightweight of electric vehicles to improve the battery range. Novista Group supplies DBDPE, BDDP, FR245, SR130 to global market.
Heat Stabilizers for PVC: A complete guide-1
2022 / 02 / 24
Polyvinyl Chloride a.k.a. PVC, a long chain of vinyl chloride, finds numerous applications in commercial, industrial, and medical products. Before exploring the world of heat stabilizers used for PVC, let's start with the basics of this resourceful polymer. What is PVC? Polyvinyl chloride or PVC is the world's third-most widely produced synthetic plastic polymer; the first two being polyethylene and polypropylene. Discovered by a German chemist, Eugen Baumann in 1872, he observed that some vinyl chloride in a flask had started to polymerize in a white solid during exposure to the sun. However, the use of PVC in commercial products became more widespread only after American inventor Waldo Semon and the B.F. Goodrich Company, in 1926 successfully developed a system to plasticize PVC by blending it with numerous additives. But why was there a need for additives? Even though Polyvinyl chloride (PVC) is one of the most commercial polymers, it is thermally unstable at processing temperatures. The incorporation of additives increases its thermal stability, makes it more flexible and a more easily processable material. For PVC, the thermal decomposition temperature is lower than the processing temperature, the use of proper heat stabilizers is essential during its processing and as well as afterwards. Stabilizers are special types of additives assimilated into plastics to afford protection against heat, UV and mechanical degradation of the polymer during both processing and use. PVC has the most requirement of heat stabilizers and hence it is observed that heat stabilizers find major applications in the PVC industry. Heat stabilizers are commonly used to secure the PVC products at all stages by improving resistance at high temperatures.
Heat Stabilizers for PVC: A complete guide-2
2022 / 02 / 24
What are Heat Stabilizers? Heat stabilizers are additives that are intended to shield polymers from the degrading effects of heat at the time of processing or use. Role of Heat Stabilizer in PVC processing Polyvinyl chloride or PVC has a maximum operating temperature of around 60°C (140°F). At this temperature, the heat distortion of PVC begins. As PVC starts getting heated up to 170°, hydrogen and chlorine are eliminated i.e. HCl (autocatalytic dehydrochlorination) is released as decomposition initiates. A chain reaction starts as unstable molecules appear and stimulate the next HCl loss. Thermal Degradation of PVC So what exactly do the heat stabilizers do to improve the resistance of PVC compounds to heat or high temperatures? In simple words, heat stabilizers neutralize hydrogen chloride, replace weakened carbon-chlorine bonds and prevent oxidation to safeguard the vinyl product. Thus, heat stabilizers play a major role to prevent the degradation of PVC compounds. Types of Heat Stabilizers for PVC Calcium-Zinc based Stabilizers Calcium-Zinc-based Stabilizers are new generation stabilizers that are gaining importance in the PVC market. Calcium Zinc Stabilizers mainly consist of Calcium Stearate, Zinc Stearate, organic and inorganic non-toxic co-stabilizers, and internal and external lubricants. They are usually available in flake or powder forms. Let`s dive deeper to understand some of the major features of these non-toxic stabilizers. Benefits of Calcium Zinc based Stabilizers -Non-toxic and eco-friendly stabilizer -Core stabilizers provide initial colour sufficient for PVC processing. -Co-stabilizers are used to give e
Heat Stabilizers for PVC: A complete guide-3
2022 / 02 / 24
Lead-based Stabilizers Lead-based stabilizers offer the best electrical properties. This is stated by and large by the fact of the insolubility property of lead chlorides formed during stabilization. The Lead-based One Pack Stabilizers have a proportionate combination of Lead Stearate, Dibasic Lead Stearate, and Lubricants that give synergistic effects. The diligently manufactured lead-based stabilizers make processing easy and show excellent properties. Benefits of Lead-based Stabilizers -Excellent heat and light stability -Higher output, reducing the processing cost. -Superior gloss. -Exceptional mechanical and electrical properties -No variation in wall thickness, resulting in lower rejections and wastages. -Longer life of screw & barrel. -Consistent physical properties such as impact strength and pressure test. -Display a wider processing range Liquid Mixed Metal Stabilizers The liquid mixed metal stabilizers are based on metal octoates of Ba, Cd, K, Zn for several flexible applications. They provide moderate to high heat stability. Mixed metal stabilizers are more versatile, proprietary & available in many grades. Benefits of Liquid Mixed Metal Stabilizers -Barium, Cadmium & Zinc based stabilizers are the most efficient liquid stabilizers and are used in Footwear and Calendaring products. -Barium & Zinc based liquid stabilizers modern range of non-toxic and are best suited for leather cloth application -Cadmium & Zinc based liquid stabilizers are used for Foamed leather cloth, Flexible Extrusions, etc. Organotin stabilizers Organotin stabilizers are said to be the most efficient and best stabilizers for PVC du
Why the extremely flammable Red Phosphorus is also a flame retardant?
2022 / 02 / 19
Red phosphorus is extremely flammable - the main raw material for making matches. It may seem inconceivable to use red phosphorus as a flame retardant, but red phosphorus is indeed an efficient flame retardant, especially in plastics; but in resins, red phosphorus and other phosphorus-containing flame retardants function The process is not a simple oxidation, and the phosphorus-containing flame retardant mainly acts in the condensed phase. The flame retardant mechanism is: ①. Phosphoric acid is formed as a dehydrating agent, and promotes the formation of carbon. The formation of carbon reduces the heat conduction from the flame to the condensed phase, and can play an insulating role. ②. Phosphoric acid can absorb heat because it prevents the oxidation of CO to CO2 and reduces the heating process. ③.Form a thin glassy or liquid protective layer for the condensed phase, thus reducing oxygen diffusion and heat and mass transfer between gas and solid phases, inhibiting carbon oxidation process, reducing combustible substances and combustibles gas concentration. ④. The thermal decomposition of phosphorus-containing flame retard
The insulation tape is to be judged as flame retardant
2022 / 02 / 19
1. Can not continue to flame longer than 60s after any of five 15s applications of test flame. 2. Can not ignite the cotton on the burner, wedge or floor of the enclosure. 3. Less than 25% of the indicator flag burned away after any of five 15s applications of test flame. Novista Group supplies equivalent of FP-2100JC, FP-2200S, FP-2500S, Exolit OP1230, OP930, OP1312, OP1314 to global market.
Why Insulation Tapes Can Be Flame Retardant?
2022 / 02 / 19
1. Backing is Flame Retardant 2. Add Flame Retardant into Adhesive - Chlorides - Bromides - Nitrides/ Phosphides - Al(OH)3 --.. Novista Group supplies DBDPE, BDDP, FR245, SR130 to global market.
PVC impact modifiers Excellent performance
2022 / 02 / 18
PVC impact modifiers Excellent performance With the rapid development of the global plastics industry, PVC impact modifier development is also advancing by leaps and bounds. In recent years, the average annual growth rate of plastic PVC industry reached 4% -6%, has exceeded the level of GDP growth. The main reason for this growth is that plastic materials continue to replace traditional materials such as metals, wood, and minerals. In fact, the various additives added to the resin for the successful application of plastic materials is also helpful. Among the various types of additives used, impact modifiers and PVC impact modifiers provide the most exclusive and valuable performance for polymers, while also improving the processability of the product. Toughening treatment, rheological performance control, appearance aesthetics, processing performance and economic factors are important properties of the property. All these additives have been used for many years, after a long period of development derived from a wide range of varieties. One of the main reasons for this is the diversity of the emulsion polymerization process, which allows scientists to continuously design suitable polymer components, polymer structures, polymer morphology and polymer molecular weight / molecular weight distribution. The emulsion polymerization is still very attractive in commercial production due to the low cost of production and the ease of separation of the resulting emulsion product. In 1956, the first polymer additive for emulsion polymerization was developed, which is a core-shell structure impact modifier prepared from methacrylate-butadiene-styrene (MBS). Followed by a variety of acrylic processing aids and
PVC Processing Aids Hysical Properties
2022 / 02 / 18
PVC Processing Aids Hysical Properties PVC processing aids are the main raw materials for acrylic esters and methyl methacrylate. In the actual production, usually the first acrylic and other monomers (such as styrene, acrylonitrile, etc.) by emulsion polymerization to form a glass transition temperature of the polymer, that is, with the elastic properties of the core, and then with methacrylic acid Methyl ester, styrene and the like to form a polymer having a core-shell structure. The emulsion solid content of this emulsion polymerization is generally about 45% ± 3%, the emulsion and then dehydrated to make the product less than 1% water content (mass fraction), to obtain white powder products. Core-shell emulsion polymerization is the core of ACR resin production technology. Although the core structure of ACR has "hard core-soft shell structure", "soft-core-hard shell structure" and "hard-soft-hard three-layer structure", but the current market sales of the main varieties of " Hard shell structure ", with the structure of ACR resin performance is good, more widely used. "Soft-core-hard shell structure" of the core-shell emulsion polymerization, the process is the first step in the emulsion polymerization of the formation of soft latex particles grafted hard monomer. The types and amounts of emulsifiers, the ratio of core-shell, shell monomer feeding, the degree of crosslinking of rubber latex (rubber core), the size of seed and the type and amount of crosslinking agent, and so on. The core-shell structure and ACR's final product performance have a significant impact. The addition of PVC processing aids in plastic processing is a chemical that produces a chemical reaction at the time of processing. We know that the chemical industry is relatively harmful to the human body, then the PVC processing aids on the human body is harmful? We come to introduce: PVC processing
PVC Processing Aids Hysical Properties
2022 / 02 / 18
PVC Processing Aids Hysical Properties PVC processing aids are the main raw materials for acrylic esters and methyl methacrylate. In the actual production, usually the first acrylic and other monomers (such as styrene, acrylonitrile, etc.) by emulsion polymerization to form a glass transition temperature of the polymer, that is, with the elastic properties of the core, and then with methacrylic acid Methyl ester, styrene and the like to form a polymer having a core-shell structure. The emulsion solid content of this emulsion polymerization is generally about 45% ± 3%, the emulsion and then dehydrated to make the product less than 1% water content (mass fraction), to obtain white powder products. Core-shell emulsion polymerization is the core of ACR resin production technology. Although the core structure of ACR has "hard core-soft shell structure", "soft-core-hard shell structure" and "hard-soft-hard three-layer structure", but the current market sales of the main varieties of " Hard shell structure ", with the structure of ACR resin performance is good, more widely used. "Soft-core-hard shell structure" of the core-shell emulsion polymerization, the process is the first step in the emulsion polymerization of the formation of soft latex particles grafted hard monomer. The types and amounts of emulsifiers, the ratio of core-shell, shell monomer feeding, the degree of crosslinking of rubber latex (rubber core), the size of seed and the type and amount of crosslinking agent, and so on. The core-shell structure and ACR's final product performance have a significant impact. The addition of PVC processing aids in plastic processing is a chemical that produces a chemical reaction at the time of processing. We know that the chemical industry is relatively harmful to the human body, then the PVC processing aids on the human body is harmful? We come to introduce: PVC processing
PVC foaming regulators Effective adjustment
2022 / 02 / 18
PVC foaming regulators Effective adjustment PVC foam regulator is a PVC material in the processing to provide foam products, PVC foam regulator can effectively adjust the PVC foam performance, improve the plasticity of PVC material stability. Throughout the current situation of PVC foam regulator, the following four development advantages: 1, the analysis of high precision testing services: effectively get all kinds of test problems, detection accuracy close to 100%. 2, has a first-class map of the joint analyzer: a world-class map of the joint analyzer to ensure the accuracy of detection. 3, the shortest only 3 working days within the analysis time: more than the average global analysis with 10% -35%, significantly increase the efficiency of analysis and detection. 4, high-quality analysis of the detection industry professionals: senior analysis of the industry professionals to ensure that my unit in the chemical industry leader in the leading position to lead the development of analytical testing. The face of PVC products market conditions, PVC foam regulator will be a steady pace in the plastic development on the road. Plastic market, especially the PVC market needs to develop, but also need technology boost, PVC foam regulator can be a strong boost the development of PVC plastic. PVC plastic market is a very promising industry market. At present, the plastic market has gradually developed for the direction of deep processing, in the existing market, continue to increase the intensity of plastic production. At the same time, plastic research is also we have to focus on, with boutique, but also constant innovation, to lead the market. PVC foam regulator of the quality and technology research and development can boost the development of PVC plastic market. The face of the future of the plastic market, PVC foam regulator quality and technolo
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