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The importance of Halogen-free flame retardant
2023 / 01 / 07
Halogen-free is a phrase that many of us recognise. It is often used in connection with cable products, and is generally understood to be a good thing. But why is being free of halogens a good thing, and what are halogens in the first place? Halogen is the name used to describe a group of elements on the periodic table that exhibit similar properties. These elements are: Fluorine Chlorine Bromine Iodine Astatine Halogens are particularly useful elements in a wide variety of applications, from disinfectants to lighting. They are even essential for good health - with the exception of Astatine, the human body contains small amounts of all of the halogens. For the purposes of this article, their most useful application is a constituent compound used in electrical cables. One of the most popular cabling materials in use today is PVC (P
Study on Overall Effectiveness of Flame Retardants.
2023 / 01 / 07
There has been some confusion in the media about one particular study that evaluates the benefits of flame retardants- Fire Hazard Comparison of Fire-Retarded and Non-Fire-Retarded Products , V. Babrauskas et., al (1988). The U.S. Department of Commerce, National Bureau of Standards completed study, which was sponsored by the Flame Retardant Chemicals Association. The study was intended to measure the overall effectiveness of flame retardants, not any one fire standard. It does this objectively. Specifically, the study tests five product types: Polystyrene television cabinet Polyphenylene oxide business machine housing Polyurethane foam-padded upholstered chair Electrical cable with polyethylene wire insulation and rubber jacketing Polyester/glass electric circuit board. The study authors tested both the individual products as well as a simulated room that contained all of the products. In evaluating the simulated room, the following conclusions were stated: [For the FR [fire retardants] tests, the average available escape time was more than 15-fold greater than for the occupants of the NFR [non-fire retarded] room. With regard to the production of combustion products:
Experiment Showing the Effectiveness of Flame Retardant Use in Building Materials
2023 / 01 / 07
One recent fire that attracted significant attention due to its 100 fatalities was the Rhode Island nightclub fire. A less widely known element to the story is that many attributed the fire`s rapid spread to the soundproofing material used at the nightclub, which reportedly did not meet the flammability provisions required under state building code. In the aftermath of the tragedy, NIST ran a study to make specific recommendations to improve the fire safety of nightclubs as a result of the agency`s investigation of the Feb. 20, 2003, fire at The Station nightclub in W. Warwick, R.I. As part of their work, NIST scientists ran flammability experiments of non-fire retarded and fire retarded soundproofing material using similar pyrotechnics to those that were used the night of the fire. These materials were purchased from a distributor in several lots, but no information is given as to the types of flame retardants used. The study concluded the following: [The experiments that involved discharging pyrotechnic devices against a foam-covered wall demonstrated that the shower of sparks could ignite non-fire retardant polyurethane foam, but that the sparks were not able to ignite fire retardant polyurethane foam, wood paneling or gypsum board within the 15 second discharge. The ignition of the non-fire retarded polyurethane foam was similar to the ignition sequence observed in the video of the incident."
A Review of Recent Progress in Phosphorus-based Flame Retardants
2022 / 12 / 17
Recent patent and technical works indicate a growing interest in halogen-free solutions with the predominance of the literature focusing on phosphorus-based flame retardants. Patents published on the flame retardancy of polycarbonate and its blends significantly exceed the number of patents on flame retardancy of any other polymer. Bridged aromatic diphenyl phosphates, especially resorcinol bis(diphenyl phosphate) and bisphenol A bis(diphenyl phosphate) have found broad application because of their good thermal stability, high efficiency, and low volatility. Another actively reported group of compounds are the metal salts of dialkylphosphonic acid as well as calcium hypophosphite, which have recently been found to be particularly effective in poly(butylene terephthalate) and polycarbonate. These products are synergistic with a number of phosphorus and nitrogen-containing compounds, such as melamine salts, which seem to be very efficient and commercially useful in nylons. Printed wiring boards comprise the largest market for flame-retardant polymeric materials. Recently, there has been a strong interest in halogen free solutions in East Asia and Europe. A recent halogen-free introduction is the 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, which can be reacted into epoxies. Another reactive product with some processing and property advantages is poly(m-phenylene methylphosphonate). Because of the banning of pentabromodiphenyl ether in Europe and voluntary withdrawal of this product from the market in the US, the polyurethane (PU) indus
Characterization of Polyurethane Nanocomposites for Flame Retardant Applications
2022 / 12 / 17
In recent years, polymer nanocomposites have attracted extensive attention in materials science because they often exhibit a field of different properties from those of their counterpart polymer micro-composites whose matrices contain the same inorganic components. This novel polyurethane nanocomposite to reduce toxic gases was designed to improve the possibility to resolve several industrial and environmental problems after combustion as intoxication by inhalation. According to this, stoichiometry of rigid polyurethane foam was based on nonmetallic nanoparticles for fireproof applications. On the other hand, we realized synthesis and characterization for the novel polymer, Fourier Transform Infrared (FT-IR) spectroscopy and X-ray scattering were applied to collect information on the nanometer-scale physical structure of the polyurethane nanocomposite. Also, scanning electron microscopy (SEM) was used to understand the internal nanostructure before and after combustion, as well as the gas chromatography coupled system with thermal desorption analysis (GC/MSD), to identify the chemical compositions and compounds resulted by the combustion gases generated of the polyurethane nanocomposites foams that can produce toxicity. In addition, the mechanical and flammability properties of rigid polyurethane were evaluated according to international standard test methods of burning of polymer for example using test ASTM D635. According to this, polymer nanocomposites for flammability, not only improves the fireproof properties, but can also improve others properties as can be mechanical and thermal stability providing it the potential to bring true applications to materials to take advantage of the synergies in the polymer matrix. Based on this evidence, nanopolyurethane could be a new and functional polymer for construction, automotive, or textile
New Progress in transparent flame-retardant nano-composites coating
2022 / 12 / 17
In recent years, the fire occurs frequently, which not only brings tremendous damage to human society,but also poses a great threat to human life, property, and the ecological environment . In order to reduce impact on human life caused by the fire, people use various methods for material to prevent fire. People have pay great attention to the fire retardant coating,which can provide fire protection to the materials, without affecting their physical and mechanical properties . However, the mature products of fire retardant coating are so less, that can not meet the needs of society and people. In order to improve and enrich the fireproof coating system, it is very important to further study transparent fire retardant coatings, develop novel transparent fire retardant coating. In recent years, the research group of Yuan Hu, the Professor of the State Key Laboratory of Fire Science at University of Science and Technology of China, focuses on the new viable design method of novel flame retardant monomers by molecule regulation and the structure and composition change of coating. And a series of new progress had been made in the design and fabrication area of transparent flame retardant nanocomposite coating. The related research results have been published in a series of famous international journals, such as polymer, Materials Chemistry and Physics, Polymer for Advanced Technologies and admired three patents. Although the flame retardant coating can prot
2022 / 12 / 10
Causes of PVC pipe burst 1. The purchased PVC pipes are inferior quality pipes and contain recycled materials. This kind of pipe is prone to bursting after being used for a period of time. 2. The PVC pipe cannot meet the design pressure requirement. When the water supply pressure is too high, the pipe burst, the drum breaks, and the bag pick up. 3. The PVC pipe is too long and the expansion joint is not used, resulting in excessive thermal expansion, pipe bursting, drum braking, and bag lifting. When purchasing PVC pipes, you must purchase qualified products according to the purpose of use, and install them in strict accordance with the procedures during installation, so that there will be no pipe bursts, drums, and packages.
Is the heavier the PPR fittings the better?
2022 / 12 / 10
PPR Pipe fittings such as PPR elbows or PPR tees are generally divided into all-plastic pipe fittings and copper embedded pipe fittings, so we will discuss the weight of the two PPR pipe fittings separately. First of all, whether it is all-plastic PPR pipe fittings or copper-inlaid pipe fittings, the PPR raw materials are used in the plastic part. The density of pure PPR raw materials is between 0.89g/cm³ -0.91g/cm³ . There are different PPR pipe brands and manufacturers due to mold design. Different, there are generally differences in individual size and weight. Secondly, in addition to the PPR material, what determines the weight of copper-embedded PPR pipe fittings is the copper label and weight. The copper inserts of the PPR pipe fittings we produce are made of HPB62 high-precision brass one-time forging, 4 layers, and 8 processes are used. The material is very elegant, our ppr pipe fittings are obviously heavier than the PPR pipe fittings produced by other factories, and more importantly, the main component of the weight of the pipe fittings we produce is copper. We all know that the price of copper material is 5-7 of the price of PPR material Therefore, our ppr fittings have better quality and better materials. What if PPR pipe fittings are produced from non-PPR raw materials, or if they are produced from non-pure materials? How to simply identify it? It is difficult to judge whether the PPR pipe material is pure from the appearance or weight alone. The simple reference method is: ignite the pure PPR pipe fittings, which are not black and odorless, and can pull out a long round wire. If it burns, it will turn black. If there is a peculiar smell, and the long round
How to deal with the burst of PVC pipe fittings
2022 / 12 / 10
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.
New process discovered to completely degrade flame retardant in the environment
2022 / 12 / 10
A team of environmental scientists from the University of Massachusetts Amherst and China has for the first time used a dynamic, two-step process to completely degrade a common flame-retardant chemical, rendering the persistent global pollutant nontoxic. This new process breaks down tetrabromobisohenol A (TBBPA) to harmless carbon dioxide and water. The discovery highlights the potential of using a special material, sulfidated nanoscale zerovalent iron (S-nZVI), in water treatment systems and in the natural environment to break down not only TBBPA but other organic refractory compounds that are difficult to degrade, says Jun Wu, a visiting Ph.D. student at UMass Amherst's Stockbridge College of Agriculture and lead author of the paper published in Environmental Science & Technology. "This is the first research about this dynamic, oxic/anoxic process," Wu says. "Usually, reduction or oxidation alone is used to remove TBBPA, facilitated by S-nZVI. We combined reduction and oxidation together to degrade it completely." Wu emphasizes that "the technique is technically simple and environmentally friendly. That is a key point to its application." The research is featured on the cover of ES&T, which is widely respected for publishing papers in the environmental disciplines that are both significant and original.
Lifesavers in Demand: New Market Report on Flame Retardants
2022 / 12 / 10
In the event of fire, additives can provide the decisive seconds for rescue. [Flame retardants delay the ignition of flammable materials such as plastics, textiles or wood," [They slow down the spread of fire." About 2.26 million tonnes of flame retardants were processed worldwide in 2018. Construction Sector and Electrical Industry Are the Largest Sales Markets The construction industry is the most important application area of flame retardants: About 30% of global demand originate in this segment. Flame retardants are often used for insulation foams. In 2017, the catastrophic fire at Grenfell Tower in London has shown how important fire protection is. Electrics and electronics is the second largest application area, accounting for a global demand of 534,000 tonnes of flame retardants. Further applications are cables and products used in the transportation industry. Until 2026, it's expected demand for flame retardants in the segment transportation to experience the strongest percentage growth: approx. 2.8% per year. However, construction materials will continue to be the largest application area in the upcoming eight years. Regional Differences in Regard to Flame Retardant Types Aluminum trihydroxide (ATH) is currently and by far the most frequently sold flame retardant worldwide accoun
Rising Demand for Plastic Additives
2022 / 12 / 10
Most of the time, plastics would be useless without additives. Additives facilitate the processing of plastics, protect against heat and UV rays, and expand the range of properties by modifying material characteristics. [Only additives make it possible to permanently use plastics in ever new applications" explains Oliver Kutsch, CEO of Ceresana. The market research company analyzed the complete world market for all major plastic additives for the second time: fillers, plasticizers, pigments, flame retardants, stabilizers, impact modifiers, slip agents, antioxidants, blowing agents, as well as other plastic additives. Rising Demand for Plastic Additives Global demand for plastic additives amounts to approx. 33.3 million tonnes every year. More than half of this amount is processed in Asia-Pacific. North America and Western Europe follow at a great distance. As plastics are more practicable and lighter most of the time, they increasingly replace other materials such as wood or metal. Therefore, demand for plastic additives will continue to increase in the years to come. The latest study of Ceresana examines the respective development of particular plastic additives in the 16 most important countries in detail. Construction Industry Is the Major Consumer Plastics are increasingly used in all industries as they are more safe, more reliable, more lightweight, and cheaper. Many plastics are used in the construction industry in particular: They are increasingly becoming the first choice regarding, among others, the thermal
Application And Development Prospects Of Plastic Additives Flame Retardants In The Field Of PVC
2022 / 12 / 03
As a widely used resin of a large variety, polyvinyl chloride has a wide range of applications in the construction field. There are DRF series flame retardants in the country, which are prepared by using proprietary ultra-fine, surface modification and compounding technologies. Not only have good flame retardant performance, but also have low smoke, halogen-free and non-corrosive properties. They are both flame-retardant and electrical insulation. , After filling, the material has good mechanical performance and other functions, and is low-smoke, non-toxic, environmentally friendly, safe and reliable to use, and can reduce the generation of smoke in systems containing halogen or phosphorus. It is widely used as a plastic auxiliary flame retardant in PVC, PU, etc., with high flame retardant efficiency and little impact on the mechanical properties of the substrate. Its flame retardant and smoke elimination have very important significance. In the past, the flame retardant of PVC was generally added with organic flame retardants, but organic flame retardants were expensive and highly toxic, and would migrate and ooze in PVC, thereby affecting the flame retardant effect. In addition, a large amount of toxic smoke is emitted during combustion to cause suffocation and poisoning. The new inorganic composite flame retardant has solved the flame retardant and smoke elimination problem of PVC. It has the characteristics of non-toxic, low cost and permanent flame retardant. PVC hair treated with it Both the smoke volume and oxygen index meet the national standards, and no secondary pollution will be generated dur
Product Features Of Textile Flame Retardant
2022 / 12 / 03
1. After washing several times, it still has excellent flame retardant properties. 2. It is colorless, transparent, halogen-free, does not affect the color fastness to light, feels soft, and does not regain moisture and crystallize. 3. Colorless and transparent, non-flammable, non-toxic, non-corrosive and non-polluting. Novista Group supplies APP, MCA, aluminium hydroxide,magnesium hydroxide to global market.
Application Range Of Textile Flame Retardant
2022 / 12 / 03
Fiber fabric flame retardant can treat all kinds of patterns, twill, flannel, canvas, linen, non-woven fabrics and their finished products (such as: clothes, cloth hats, capes, curtains for entertainment venues, shed fabrics, venue curtains , Theater set, safety bag, etc.) and a variety of knitwear (such as: sweaters, toweling, gloves, carpets, etc.). Novista Group supplies DBDPE, BDDP, FR245, TTBP,SR130 to global market.
Raw Materials Used in CPVC Piping
2022 / 11 / 19
All CPVC products used in industrial plants today-such as piping, fittings, sheet and ducting-began as two separate materials: chlorine and ethylene. Chlorine is one of the byproducts of chlor-alkali salt processing. Ethylene is extracted from petroleum that is put in a special facility called a cracker. Manufacturers then react these two materials together to form a new liquid chemical: ethylene dichloride (EDC). Then, through an oxychlorination process, EDC is dehydrated, heated an ultimately broken down into vinyl chloride monomer (VCM).
In The Laboratory: Compounding Solutions
2022 / 11 / 19
The current trends indicate an oversupply of raw materials, a situation that could last for some time. With a large amount of resin on the market, chemical companies are cutting their research and development budgets. This could force compounders to fill the cap, meaning they will have to perform more testing. They may lean on distribution partners for technical assistance. The need for lightweight, more durable and low-emission materials, plus increasing demands on design, are forcing the plastics industry to develop new and innovative materials. Polymer material and compound development takes place in every step of the research and development process to produce materials with different properties to the base material or to produce material with desired qualities, using various additives. In a laboratory, compounders can upgrade or add to the value of polymers or polymer systems through melt blending and mixing of additives to a polymer matrix. Two or more polymers can be combined to create a specialty product with desired properties. Common additives used today include colorants, flame retardants, talcum, glass and additives for changing the optical or mechanical properties. These additives can be processed as pellets, powder or flake.
A Brief Description Of Wood Flame Retardant
2022 / 11 / 19
Wood is a porous and complex natural organic material mainly composed of cellulose, hemicellulose and lignin. Its characteristics are: it does not dissolve or melt under normal processing and use conditions, so the processing method is different from synthetic polymers; wood molecules contain a large number of hydroxyl and hydroxymethyl and other oxygen-containing polar groups, so they have strong hygroscopicity , Poor dimensional stability; besides being flammable, it still has the characteristics of being perishable and chemically degradable. The above-mentioned characteristics of wood determine that the mainstream varieties of wood fire retardants are all water-solvent products, and the dominant addition method is the impregnation method. Novista Group supplies APP, MCA, aluminium hydroxide,magnesium hydroxide to global market.
How To Use Textile Flame Retardant
2022 / 11 / 19
1. Spray method: The fabric should be kept clean and dry before treatment. When spraying, the spray should be sprayed through, and it can be dried or dried naturally. 2. Dipping method: the treated fabric is dipped-pressed (rolling rate: 70%)-dried. Usage: According to the adsorption of the fabric, the dilution ratio of the flame retardant, from the original solution to the maximum dilution ratio of 50% Flame retardant: 50% water, should be determined according to the actual situation. In general, it is recommended to use 70% flame retardant: 30% water. Dosage: Fabric, under normal circumstances, 100 grams of fabric, standard width of 1.5 meters, each linear meter consumes about 50-80 grams of flame retardant. For carpets, about 120-150 grams of flame retardant is consumed per square meter. It should be determined according to the actual situation of the carpet. Novista Group supplies DBDPE, BDDP, FR245, TTBP,SR130 to global market.
PVC injection molding plastic resin -2
2022 / 11 / 12
1.Pay attention to the following points during product design and mold design: Try to avoid sharp corners or abrupt changes in the product, and the thickness should not change too much, so as to prevent the PVC from degrading. 2.The mold should be designed with a draft angle of more than 10°, allowing for a shrinkage rate of about 0.5%. 3.During mold runner design, pay attention to the following points a). The mold injection gate should be slightly larger than the nozzle, and larger than the diameter of the conjunctions in the sprue, so that the PVC material is able to flow into the cavity without being blocked, while the pressure is also balanced. b). Try to adopt the intercepting gate, so that the slag will not flow into the product and cause runner temperature reduction, thus making it easier to form. c). The gate should be designed at the thickest part of the product, with a sufficient width guaranteed, while the length is preferably between 6-8mm, so that the PVC material is able to flow in smoothly.
What's the Difference Between PVC and CPVC Pipe? -2
2022 / 11 / 12
Applications of PVC & CPVC: As mentioned before, CPVC is more suitable for hot water applications up to 200F. PVC is still often used for unheated water as well as for vent and drainage systems; however, CPVC has become widely used for both hot and cold potable water. The more resistant properties of CPVC make it useful for commercial and industrial applications as well. Because of its wider range of applications, CPVC is usually pricier than PVC. That being said, it is still a very cost-effective and versatile material. We recommend the use of PVC for recreational use/building, cold water systems, vent systems, and drainage systems. CPVC is recommended for applications where the maximum temperature will exceed 140 degrees Fahrenheit, but stay under CPVC's max rating of 200 degrees Fahrenheit. Another deciding factor in which material to use is the chemical makeup of media being handled in your application. Though PVC and CPVC both are resistant to many of the same c
Features Of Wood Flame Retardant
2022 / 11 / 12
1: High flame retardant effect, which can prevent flame burning and suppress smoldering (flameless burning, red hot burning); 2: The flame retardant itself is non-toxic and does not pollute the environment during production and use. The pyrolysis products of flame-retardant wood should have less smoke, low toxicity, non-irritating and non-corrosive; 3: Long-lasting flame retardant performance, no heat or light decomposition occurs during use, and it is not easy to be hydrolyzed and lost; 4: Low moisture absorption, good dimensional stability of flame retardant wood; 5: The physical and mechanical properties and process properties of wood are basically not affected; 6: It has anti-corrosion and insect-proof performance; 7: The environmental characteristics of wood such as vision, touch and adjustment are basically not affected; 8: Low cost, abundant sources and easy to use. Novista Group supplies APP, MCA, aluminium hydroxide,magnesium hydroxide to global market.
The Development Trend Of Wood Flame Retardant
2022 / 11 / 12
1) In view of the development of science and technology, in a long period of time, the phosphorus-nitrogen-boron water-based flame retardant system will still be the mainstream of wood flame retardants. Future work is mainly to further improve the resistance to loss and migration. And reduce costs. 2) With the progress of society, people's performance requirements for materials are not only higher and higher, but also more and more comprehensive. Wood protection agents with flame retardant, anti-corrosion, insect prevention, anti-loss and dimensional stability will become wood The main development direction of flame retardants. 3) When a fire occurs, direct casualties and indirect property losses caused by heavy smoke, especially toxic smoke, and indirect property losses caused by hindering rescue operations are often no less than fire losses. Smoke suppression research will become important for wood fire retardants. Subject. 4) With the gradual deepening of people's understanding of flame retardant mechanism, the research of new flame retardant system will wait for attention. It is expected that the intumescent flame retardant system, which has been rapidly developed in the field of synthetic polymer materials, will play a role in the field of wood composite materials. 5) Due to the non-biodegradability of plastics, the amount of recycled plastics will increase dramatically in the next few years, which provides a raw material basis for the manufacture of new thermoplastics-wood composite materials. Such materials will fundamentally avoid
Wood Flame Retardant Classification
2022 / 11 / 12
(1) Basic chemical properties (inorganic, organic, etc.) (2) The flame-retardant elements or the combination of flame-retardant elements (phosphorus, nitrogen, halogen, etc.) (3) The method of adding flame retardant to the material (additive type, reactive type) (4) Compound type (acid, alkali, ether, ester, oxide, hydroxide, salt, etc.) (5) Mechanism of action (physical or chemically active flame retardant, gas phase or condensed phase flame retardant) (6) Durability of flame retardant effect (light, heat, chemicals and water, etc.) Novista Group supplies DBDPE, BDDP, FR245, TTBP,SR130 to global market.
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Email:manager.han@novistagroup.com
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Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.