Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.
News
Home > News
2022 / 04 / 24
The elastomeric and rubbery nature of impact modifiers absorbs or dissipates the energy of impact. Impact modifiers can be incorporated through polymerization in the reactor, or may also be incorporated as additives in the compounding step. The two mechanisms by which impact modifiers work are discussed below. Craze Propagation The principle is to disperse impact modifiers into the brittle matrix, a dampening phase capable to absorb energy and stop craze propagation.
Advantages and disadvantages of commonly used flame retardants
2022 / 04 / 23
In recent years, with the increase in the output of plastic products and the improvement of safety standards, flame retardant materials are more widely used. Generally speaking, flame retardant materials can be divided into organic flame retardant materials and inorganic flame retardant materials. The organic flame retardant has good flame retardant effect and the addition amount is relatively small. However, organic flame retardants have the drawbacks of generating large amounts of smoke and releasing toxic gases during combustion. Inorganic flame retardants have the advantages of non-toxic, smoke-free, non-volatile and cheap, but the amount of addition is relatively large. 1. Halogen flame retardant Halogen flame retardants are not only large in output, but also widely used. The material added with the flame retardant can release hydrogen halide and obtain free radicals during the combustion process, thereby preventing the transfer of the combustion chain, and then generating free radicals with low activity to slow down the combustion. Halogen flame retardants are generally used in thermoplastic materials and thermosetting materials. They not only have good compatibility with polymer materials, but also are easy to use. Therefore, they are welcomed by the market and are widely used in automobile, packaging, textile and other industries. 2. Phosphorus flame retardant Inorganic phosphorus flame retardants mainly include phosphates, red phosphorus, etc. Red phosphorus is widely used. Red phosphorus is a good flame retardant, but in practical applications, red phosphorus flame retardant materials are easy to
Why use flame retardants in china
2022 / 04 / 23
Flame retardants are chemicals added to materials to interfere with combustion. This disturbance is usually to achieve some desired refractory properties - slow ignition, reduce flame spread, etc. Widely used in plastic, wood and textile fire protection. Phosphorus flame retardants (including organic phosphorus and inorganic phosphorus) can carbonize the combustion material to achieve a flame retardant effect. This flame retardant effect mainly plays a role in the solid phase. In order to impart basic flame retardant properties to plastics, inorganic fillers (aluminum hydroxide, magnesium hydroxide) have also been used, which can release water molecules by thermal decomposition. Novista Group supplies equivalent of FP-2100JC, FP-2200S, FP-2500S, Exolit OP1230, OP930, OP1312, OP1314 to global market.
Application and advantages of brominated flame retardants
2022 / 04 / 23
Bromine is used as a flame retardant, in addition to mercury removal, air purification and other fields. With the wide application of polymer materials such as plastics in household environments, public places and vehicles, flame retardants have increasingly become a must-added fire retardant. Currently, flame retardants are mainly used in four fields: transportation, electronic and electrical equipment, furniture, and buildings and construction materials. There are more than 200 kinds of flame retardant family products, which can be divided into bromine-based, phosphorus-based, nitrogen-based, silicon-based and inorganic flame retardants according to different elements. There is also an inevitability to this diversity, as the materials and products that are to be fire resistant vary widely in properties, composition and even application. Some flame retardants may be very suitable for some specific applications, but not in other areas. That is, there is no one flame retardant, and different solutions must be selected according to different applications. Material engineers will select suitable flame retardants according to the structure and properties of materials. For example, 80% to 90% of printed circuit boards use brominated flame retardants. Brominated flame retardants are very efficient and can capture free radicals in the combustion chain reaction, terminating or slowing down the chain reaction, thus playing a role in fl
The extrusion process of PVC door and window profile-1
2022 / 04 / 22
1. Production process The production process of PVC door and window profile mainly includes single screw extrusion process and twin screw extrusion process. The raw materials used in the two processes are the mixed powder prepared in the previous process according to a certain formula. At present, the extrusion line of hard PVC door and window profile mostly uses conical screw. (1) Single screw extrusion The single screw extrusion process is especially suitable for the production of small batch and small size profile. The process flow is as follows: Mixed powder →
The extrusion process of PVC door and window profile-2
2022 / 04 / 22
(1) Temperature control After PVC mixed powder enters the extruder, it should be compacted, transported, melted, homogenized and extruded at a lower temperature. In order to obtain high quality and high output profiles, the temperature of each section needs to be adjusted repeatedly and controlled accurately, so that the materials are always in the melting temperature and decomposition temperature range in the extrusion process. In order to set the temperature correctly, it is necessary to fully consider and guide the relevant factors of material forming temperature. Factors affecting material processing temperature 1) Formula and raw material quality have the greatest influence on the processing temperature, and the plasticization temperature of the mixture composed of different raw materials is different. After the formula is determined, the processing temperature is basically determined, which only needs to be adjusted in a small range according to the product quality; fo
How Does A Plastic Extrusion Machine Work-1
2022 / 04 / 22
As a manufacturer of piping, tubing, insulation, or any other plastic composite product, you likely already know what an extrusion machine is, but may be wondering if it's right for your high-volume manufacturing process. Plastic Extruding Machine What is Plastic Extrusion Machinery What is Plastic Extrusion Machinery? To put it simply, plastic extrusion is a "high-volume manufacturing process" in which raw plastic is melted and formed into a continuous profile. Plastic extrusion machinery is useful for speeding up workflow and volume. It's also great for ensuring consistency through your products, which are made exactly to your specifications every time.
How Does A Plastic Extrusion Machine Work-2
2022 / 04 / 22
· Temperature Control To ensure that the final materials won`t degrade or become weakened, it`s essential to maintain a consistent temperature inside the extruder`s barrel. Overheating the materials should be avoided to reduce imperfections, so typically the barrel is heated gradually from rear to front. The temperature is also maintained using a series of fan and water cooling systems before your product is extruded into a die mold. Die Types A die mold is useful in plastic extruders because they can create one continuous extrusion that can then be cut into parts. Unlike with injection molding, which injects the material into individual molds, die molds will allow your product to be continuously made at whatever size (or sizes) you need. Depending on the type of product being manufactured, there are various types of dies that can be implemented into your process.
PVC Additives from Novista in china
2022 / 04 / 16
PVC products in the production process, polymer, additives, processing equipment is the three main material conditions. There are many kinds and quantities of auxiliaries used in thermoplastics. In addition to the auxiliaries needed for curing in the processing of thermosetting plastics, the demand for other auxiliaries is relatively small. The dosage of the additive is small, usually a few percent or even a few thousandths of the weight of the polymer.However, such as plasticizer, reinforcing agent, filler, softener, flame retardant and other large dosage, up to 10 to dozens of parts. Although the amount of additives is small, but the effect is significant, even can make some of the performance defects or processing is very difficult and almost lost practical value of the polymer into valuable materials. Because of the use of auxiliaries, many fine chemical products can be used more effectively.There
PVC Roof Tile Technology In Producing
2022 / 04 / 16
What is PVC roof tile? PVC tile is made of polyvinyl chloride resin (PVC) as the main raw material, supplemented by UV anti-ultraviolet agent UV531 and other chemical raw materials, through scientific proportioning and advanced technology. PVC tile, also known as plastic steel tile, is a replacement product of color steel tile. By using multi-layer co-extrusion technology, the anti-aging layer is coated on the surface of the product, which improves the weather resistance and color persistence, and adds a wear-resistant layer on the bottom. It can also save steel and reduce costs. What are the characteristics of PVC roof tile? It is acid resistant, alkali resistant, corrosion resistant and has a service life of 30 years. Anti-impact, anti-stretching, fire protection, low noise, anti-ultraviolet. Excellent waterproof performance, Good flame retardancy, heat insulation and heat preservation. It is a new environmental protection material with bright and colorful color, no fading, no asbestos composition. It is easy to install, light in weight and low in transportation cost. Light transmittance performance is better than the same type of building materials. The materials used have light transmittance performance, which can increase indoor lighting and save energy consumption. What a
2022 / 04 / 16
PVC processing modifier series products are the company will be advanced polymer synthesis technology and tsinghua university department of bai cheng chemical engineering laboratory of nano technology, the combination of research and development of a new type of modified PVC processing AIDS, it makes full use of the nanometer materials is greater than surface area, the characteristics of the surface free energy is big, to overcome the traditional PVC processing aid in the defect of plasticizing performance at lower temperature variation. In the processing process, the strong surface tension of nanomaterials is transformed into the internal friction with PVC molecules, because this internal friction increases with the decrease of temperature, which improves the problem that the plasticizability of traditional ACR significantly deteriorates with the decrease of temperature.Compared with traditional ACR, series products have the following characteristics:1) Static stability is better than traditional processing auxiliaries.2) When the temperature changes, the shear force changes accordingly, which can make the plasticization degree of PVC basically unchanged.3) can greatly improve the processing performance of PVC, improve the surface finish of products. ⒉1 Test method
Heat stabilizer market ready for product changes-1
2022 / 04 / 16
PVC (polyvinylchloride) is a versatile polymer, either rigid or plasticized to yield a flexible plastic. It requires, however, a heat stabilizer.PVC is employed in many applications ranging from flooring, cable, and film made from plasticized vinyl to pipe, profiles, and sheets processed from rigid PVC.However, PVC can only be processed in the presence of heat-stabilizing additives to avoid changes in the chemical structure caused by elevated temperatures and mechanical stresses.Over the last decades lead (Pb) stabilizers were used to stabilize most rigid PVC worldwide except in North America, where tin (Sn) stabilizers dominated. Both systems show similar price/performance ratios; technically, they are incompatible with each other, cannot be recycled together, and thus are used exclusively in selective markets.Now a trend toward stabilizers based on calcium (Ca) and zinc (Zn) as well as organic compounds is emerging. Use of these additives is mainly driven by voluntary commitments, such as the Vinyl 2010 initiative by the European PVC industry, started by key PVC industry players in 2000. It is a 15-year-program to meet the challenges of sustainable development and continuous environmental improvement throughout the European PVC sector.Stabilizer systems based on calcium/zinc (CaZn) deliver some advantages o
Heat stabilizer market ready for product changes-2
2022 / 04 / 16
In terms of processing properties, the tendency of CaZn stabilizers to plate-out in tools and calibration has been reduced to the same level as lead. When processed with suitable lubricant systems, CaZn-stabilized profiles compare favorably with lead-stabilized profiles in terms of processability and surface gloss. Weathering performance is a critical issue in stabilization of building profiles. Testing indicates CaZn stabilizers achieve a better color hold than traditional lead systems. This effect is particularly relevant for dark colored profiles where additional cost savings may be realized by lower colorant requirements due to the reduced whitening pigment effect of CaZn compared to lead. Liquid tin stabilizers used in the United States require a high dosage of titanium dioxide (TiO2) for sufficient weathering stability. Widely used solid lead stabilizers work with a much lower TiO2 level even under extreme weathering conditions.
2022 / 04 / 16
PVC Stabilisers are added either directly into PVC or in combination to prevent oxidation, chain scission, uncontrolled recombination, and cross-linking reactions caused by photo oxidation. Essentially, they protect PVC from the harmful effects of extreme temperature and ultraviolet radiations. PVC Stabilisers are of different types like Heat Stabilisers which are mainly used in Construction projects. Antioxidants are PVC Stabilisers that prevent oxidation of PVC from taking place due to atmospheric oxygen. Hindered amine light stabilizers are PVC Stabilizers that scavenge radicals produced by weathering. The next type of PVC Stabilisers are UV absorbers. They dissipate energy absorbed by UV rays. Antiozonants are PVC Stabilisers that prevent degradation of materials cause by Ozone gas present in the atmosphere. Lastly, PVC Stabilisers are available in the form of Organosulfur Compounds that thermally stabilize polymers. UsagePVC Stabilisers are mainly used in the manufacture of Pipes and Fittings, Window
Energy and efficient Flame retardant
2022 / 04 / 16
Flame retardant is a kind of additive which can prevent the ignition of polymer materials or inhibit the flame propagation. Common and important flame retardants are compounds of phosphorus, bromine, chlorine, antimony and aluminum. Flame retardants can be divided into additive type and reactive type. The additive flame retardants mainly include phosphate ester, halogenated hydrocarbon and antimony oxide. They are mixed into the composite during the processing of composite materials. They are easy to use and have a wide range of applications, but they have an impact on the properties of the composite materials. Reactive flame retardant is a kind of monomer material added into the polymerization system in the process of polymer preparation, which is compounded to the polymer molecular chain through chemical reaction. Therefore, it has little effect on the properties of the composite and has a long flame retardancy. Reactive flame retardants mainly include phosphorus containing polyols and halogenated anhydrides. The flame retardants used in composite materials should have the following properties: 1) high flame retardant efficiency, which can give the composite good self extinguishing or flame retardant properties; 2) it has good compatibility with the composite materials and is easy to disperse; 3) it has a suitable decomposition temperature
Flameout method of flame retardants
2022 / 04 / 16
1. It produces a gas that smothers the flame. For example, antimony trioxide reacts with HCl from combustion in PVC to form a smoldering gas, namely antimony nitrogen oxide. 2. It can absorb the heat produced during combustion and cool down the combustion rate. For example, aluminum hydroxide contains up to 34% of chemically associating water in its molecules, which remains stable at the processing temperature of most plastics, but begins to decompose when it exceeds 200 ℃ and releases water vapor. And every gram of aluminum hydroxide decomposition, to absorb 36 kcal heat. 3. It provides a coating insulated from oxygen. For example, the phosphide produced by the combustion of phosphate flame retardant is an oxygen barrier coating. 4. It can form free radicals which can react with plastics and act as flame retardant. The combustion properties of the products from their reaction with plastics are very poor. Novista Group supplies equivalent of FP-2100JC, FP-2200S, FP-2500S, Exolit OP1230, OP930, OP1312, OP1314 to global market
2022 / 04 / 16
As the name suggests, flame retardants are additives used to prevent materials from being ignited and inhibit the spread of fire. They are mainly designed for the flame retardant of polymer materials. Generally speaking, flame retardants mainly play the role of endothermic, covering, chain inhibition and non-combustible gas suffocation to achieve the flame retardant effect. Materials processed with flame retardants can effectively prevent and delay the spread of flames when attacked by external fire sources. Flame retardants are divided into two categories: organic flame retardants and inorganic flame retardants. Among them, organic flame retardants include organic phosphorus flame retardants and organic halogen flame retardants. The representative products of organic halogen flame retardants It is an organic brominated flame retardant; inorganic flame retardants are mainly various metal oxides, There are big differences in performance, flame retardant efficiency and environmental protection among the three major types of flame retardants: organic halogen, organic phosphorus and inorganic, and their application fields are also different. Various flame retardant properties Compared with organic halogen flame retardants, organophosphorus flame retardants are characterized by low toxicity, less smoke, low corrosion, good compatibility with materials, and dual functions of flame retardant and plasti
How to Classify Acrylate Polymers?
2022 / 04 / 09
Acrylate polymers can be divided into the following categories according to their chemical composition: methyl methacrylate (MMA)/acrylate copolymer, MMA/styrene copolymer, acrylonitrile/styrene and so on. According to their functions, they are mainly divided into impact modifiers and processing aid. Impact modifiers mainly provide impact resistance of plastic products. Methyl methacrylate accounts for 10-20% o, acrylate accounts for 80-90% which is a core-shell structure with hard outside and soft inside. Processing aid can be divided into three main types according to their molecular weight and viscosity. 1. Molecular weight is 0.5-1.0million, intrinsic viscosity is 1.0-2.2. This kind of processing aid be called lubricating processing aids. It has the same good metal peeling performance as OPE WAX. The difference is that it has good compatibility with PVC, so it will not precipitate.nomrla type K175,ACR175 2. Molecular weight is 1.0-1.5 million, viscosity is 2.5-5.5. This kind of processing modifier is called accelerating plasticizing processing aids. It mainly promotes plasticizing, improves melt rheological properties, improves other additives dispersion, reduces plasticizing temperature and improves product appearance quality. normal type: ACR-401,K-120N,K-125,PA-21 3. Molecular weight is more than 1.5 million, viscosity is 10-14, this kind of processing aids is called foaming regulator, because it has ultra-high molecular weight, winding on the PVC structure to form a strong network structure, greatly improve the strength of PVC melt, can effectively encapsulate foaming gas, prevent gas escaping, form a uniform honeycomb porous structure, improve product surface quality, improve high gloss.
Uses of chlorinated polyethylene
2022 / 04 / 09
The appearance of chlorinated polyethylene is white, odorless, and has good weather resistance, ozone resistance, aging resistance and chemical resistance. Due to its good toughness, it has good compatibility with other polymer materials and has a high decomposition temperature. .According to different structures and uses , chlorinated polyethylene can be divided into resin-based chlorinated polyethylene (CPE) and elastomer-based chlorinated polyethylene (CM) . In the rubber industry, CPE can be used as a high-performance, high-quality special rubber, and can also be combined with ethylene propylene rubber ( EPR ), butyl rubber ( IIR ), nitrile rubber ( NBR ), chlorosulfonated polyethylene ( CSM ), etc. Other rubbers are blended for use.Main application: Due to the increasing domestic demand for high-performance flame-retardant rubber, especially the development of the wire and cable industry and auto parts manufacturing industry, the consumer demand for rubber-based CPE has been driven .Main applications: wire and cable (cables for coal mines, wires specified in UL and VDE standards), hydraulic hoses, automotive hoses, tapes, rubber sheets, PVC profile pipe modification, magnetic materials, ABS modification, etc.
2022 / 04 / 09
Impact Modifiers for PVC are added to composite materials to improve the durability and toughness of plastic resins. In addition to impact performance, a number of other material characteristics such as optical and tensile properties, weatherability, processability, flammability, heat distortion and cost can also be improved by adding impact modifiers to PVC. One of the main applications of impact modifiers is in PVC resins: MBS (methyl butadiene styrene) and acrylics (impact modifiers) increase the impact resistance of PVC products without impairing other properties.Impact resistance is one of the most critical properties in most plastics, especially styrenics, polyamides, PVC and thermosets. To solve this fragility problem, a mixture with a specific polymer or copolymerization with a monomer is usually carried out, generating a more flexible plastic material, which absorbs the impact generated energy and dissipates it in a non-destructive way.The impact modification is somewhat complex, as it influences a lot other properties such as fluidity, gloss, elastic modulus, maximum processing temperature, etc. Other properties changes may not be linear and proportional to the amount of modifier incorporated in the polymer.
What are the standards for the selection of flame retardants for nylon?
2022 / 04 / 09
Nylon has excellent properties and is widely used. Unmodified nylon has low flame retardancy, vertical combustion can only reach UL94V-2 level, oxygen index is about 24%, it will drip during combustion, it is a flammable material, and it is very easy to use in the process. Yes. catch fire. Therefore, reformed nylon flame retardants have become a common concern and research topic in today's academic and industrial circles. Next, Silver Plastic introduces the knowledge about nylon flame retardants. At present, the flame retardant modification of nylon materials is usually divided into halogen-containing flame retardant modification and halogen-free flame retardant modification. One. Halogen-containing flame retardant systems The most widely used abroad is brominated styrene polymer, which has excellent thermal stability and is being processed because it can be melt-mixed with nylon. The fluidity of the medium is good. In addition, the flame-retardant nylon prepared by using it also has excellent electrical, physical and mechanical properties. The limitations of this flame retardant are its low light stability and incompatibility with nylon. It is also more expensive than decabromodiphenyl ether, which is widely used in China. Another flame retardant that has been used in nylon for many years is flammable. It is a chlorine-containing flame retardant with high efficiency and electrical properties, but thermal stability. Due to this limitation, it is only suitable for nylon flame retardant systems with low processing temperatures.
Effects of Flame Retardant and Glass Fiber on the Properties of PA66
2022 / 04 / 09
Due to the needs of electronic product applications, PA66 must have certain flame retardancy and relative tracking index (CTI) properties. Also, depending on product strength requirements, it may be necessary to add glass fibers to the PA66 material. Commonly used flame retardants are nitrogen flame retardants, bromine flame retardants and red phosphorus. (1) Under normal circumstances, the flame retardant grade of pure nylon PA66 is UL94V-2, and the CTI value can reach CTI600. (2) When glass fiber is added to pure PA66 to increase the strength, the glass fiber is used as the core, which reduces the flame retardant grade of the material and becomes UL94-HB grade. (3) Using nitrogen-based flame retardant for PA66 and no glass fiber, it can reach UL94V-0, and the CTI value can reach 600V. (4) When glass fiber is used in PA66 and nitrogen-based flame retardant is added, the flame retardant performance of the material will also deteriorate and reach HB level. (5) PA66 also becomes UL94V-0 flame retardant grade when brominated flame retardant is added, and in the case of glass fiber reinforced material, it becomes UL94V-0 grade. However, the addition of bromide greatly reduces the CTI index of the material. Basically CTI175 or CTI250 grade. Low CTI limits the application of PA66. All Glow Wire 750 PA66 materials required by the industry are brominated flame retardants. Of course, the CTI value is not high. (6)
Flame retardant: an essential patron saint of safety
2022 / 04 / 09
On July 6, 2013, Asiana flight 214 crashed when it landed in San Francisco, its fuselage caught fire and emitted thick smoke. In this accident, although the plane caught fire, the vast majority of passengers survived smoothly. It is a kind of chemical product widely existing in our life, but often ignored, that is flame retardant. As a conventional means of fire prevention, flame retardants are widely added to a variety of materials. Flame retardant is indeed the invisible patron saint of life. Flame retardant is a kind of additives which can delay the ignition time and inhibit the spread of fire. They inhibit the occurrence of combustion reaction through a variety of action principles. Inorganic flame retardants such as aluminum hydroxide and magnesium hydroxide generate water when heated, which absorbs a large amount of heat in the process, and also plays the role of isolating oxygen; brominated flame retardants can capture the free radicals in the combustion reaction and terminate the occurrence of chain reaction; in addition, some flame retardants can make the surface of materials rapidly expand and carbonize to form a protective layer. From plastic products, synthetic leather, chemical fiber fabrics to foam insulation materials in buildings, there are polymer materials everywhere in our lives. These materials have many advantages in performance, but there is an obvious defect: they are easy to burn, thus burying a fire hazard. In order to eliminate the hidden dange
Sustainable Water Infrastructure with PVC Pipes
2022 / 04 / 09
Sustainability is the capacity to endure. In large measure, the longer something lasts, the more sustainable it is. PVC and similar materials are 30 – 70% less expensive easy to install, environmentally friendly, noncorrosive and durable with an expected design life of more than 100 years without the extensive and expensive corrosion treatments needed for more traditional pipe materials. PVC meets the demands and expectations of sustainable water. Sustainability is not the case with pipe materials that corrode. SAVING ENERGY - PVC pipe manufacturing is extremely efficient, with virtually 100% of the compound being used during the production of PVC and its conversion into finished products. It takes four times less energy to make than concrete pipe, and half that used for iron pipe. CONSERVING WATER - PVC pipes ultra-smooth surface reduces pumping costs, and its leak-free joints eliminate water loss – which can be up to 40 per cent in some old technology piping networks HIGHER WATER QUALITY - Unlike pipes made from traditional materials, the exceptionally smooth walls of PVC pipes make it extremely difficult for sediment to accumulate. Bacteria and other particles have virtually no chance to attach themselves to the pipes inner walls - a major advantage for sewer pipe systems, which often need to transport waste water containing significant quantities of sediments. SAVING MONEY- There is significant cost savings to using PVC pipes, even more so when installation, low breakage rates and life cycle costs are taken into consideration. The longevity of the pipes also mean the pipes function more efficiently, reducing maintenance and ongoing work to the pipe making it more affordable over time. PROVEN LONGEVITY- PVC Pipes have a proven performance record of over 50 years in Australia, while overseas studies show the life expectancy of PVC pipes to be over 110 years....
Send Inquiry
Mr. Ron Han
Tel:86-536-8206760
Fax:86-536-8206750
Mobile Phone:+8615336365800
Email:manager.han@novistagroup.com
Address:RM1232-1233,#4 Building No.4778 Shengli East Street, Weifang, Shandong
Related Products List
Mobile Site
Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.
Fill in more information so that we can get in touch with you faster
Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.