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What Are The Applications Of Textile Flame Retardants In The Textile Industry
2022 / 10 / 22
Flame retardants, functional additives that endow flammable polymers with flame retardancy, are mainly designed for the flame retardancy of polymer materials; there are many types of flame retardants, which are divided into additive flame retardants and reactions according to the method of use Type flame retardant. The additive flame retardant is added to the polymer by mechanical mixing method to make the polymer flame retardant. At present, the additive flame retardant mainly includes organic flame retardant and inorganic flame retardant, halogen flame retardant (organic Chloride and organic bromide) and non-halogen. Organic is some flame retardants represented by bromine, phosphorus nitrogen, nitrogen and red phosphorus and compounds. Inorganic are mainly antimony trioxide, magnesium hydroxide, aluminum hydroxide, silicon and other flame retardant systems. Reactive flame retardants are used as a monomer to participate in the polymerization reaction, so the polymer itself contains flame retardant components. Its advantage is that it has less impact on the performance of polymer materials and has long-lasting flame retardancy. The types of textile fibers involve natural fibers
2022 / 10 / 15
Applications of CPVC 1.CPVC pipe is used for transporting hot sewage, electroplating solution, thermochemical reagent and wet chlorine gas in chlor alkali plant. It can keep enough strength when the temperature is less than 100 ℃, and can be used for a long time under high internal pressure. The pipe made of CPVC has light weight, good heat insulation performance and no need of heat preservation. 2.CPVC injection parts, such as pipe fittings, filter materials, dehydrators, wire ducts, conductor protective layer, electric switch, fuse cover, cable insulation material, etc. 3. CPVC calendered sheet is used to manufacture chemical resistant and corrosion-resistant chemical equipment, such as reactors, valves, electrolyzers, etc. 4.CPVC composites composed of CPVC and some inorganic or organic fibers have better impact resistance and heat resistance than those of other resins. They can be made into plates, pipes, corrugated plates and profiles. 5. CPVC can be used to modify the fiber. The heat resistance of the product can be greatly improved by adding 30% CPVC in the spinning process. The shrinkage of the product can be reduced from 50% to less than 10%. 6. The heat resistance of foaming CPVC is better than that of PVC. It can be used as thermal insulation material of hot water pipe and steam pipe 7. Transparent CPVC can be used in automobiles, compact discs and audio-visual products. Common CPVC materials include CPVC resin, CPVC compound FOR more details. contact:mandyzhangz@novistagroup.com chemwf@gmail.com whatsapp:86 13563682728
2022 / 10 / 15
Characteristics of chlorinated polyvinyl chloride : 1.The heat resistance is improved:CPVC is made of chlorinated PVC resin. Compared with PVC,chlorinity increases from 56.7% to 63%-69%,vicat softening temperature close to 100℃. 2.Mechanical property is improved;strength of extension of CPVC increases by 50%compared with that of PVC, increases by one times compared withPPR resin.It meet the requirement of equipment and pipeline under high temperature. 3.Chemical resistance is improved: under normal temperature or high temperature,it still has characteristics of acid resistance,alkali resistance,chemical resistance,it can substitutes for traditional materials for resisting corrodible substance,prolonging service life. 4.Outstanding fire resistance,It has outstanding fire resistance and self-extinguishment,low heat conductivity coefficient.The heat-resistance pipe processed with CPVC has less heat loss,without thermal-protective coating. 5.Bacteria is not easily to be bred.The completed CPVC pipe can not be decomposed under the influence of residual chlorne,the inner wall is smooth,so that bacteria is not easily to be bred,it has action of resisting general sterilization chemicals.
What Is The Right Size Pipe For Your Main Sewer Line? (Types And Repairs) - 1
2022 / 10 / 15
Are you asking yourself, what is the right size pipe for your main sewer line? Well, you`re in luck. In this article, you`ll learn everything you need to know about main sewer lines, including their size, different types, and different repair methods. What Is The Main Sewer Line? The main sewer line is the pipe that runs underneath your home. When you flush waste down your toilet, it travels through your drain pipes and connects to the main sewer line. From here, your waste is carried to the city sewer line underneath your street. If you have a private septic tank, your main sewer line carries your waste to your tank instead. What Is The Right Size Pipe For Your Main Sewer Line? Depending on your local plumbing codes, the main sewer line for residential homes is usually 4 inches in diameter. You may think if the pipe were larger, more waste could travel without getting clogged. But that`s not true. It`s not about size. It`s about water pressure. If the sewe
What Is The Right Size Pipe For Your Main Sewer Line? (Types And Repairs) - 2
2022 / 10 / 15
Terracotta (Clay) Pipes Terracotta pipes, also called vitrified clay pipes, are made of a clay-based ceramic. Their origin can be traced back to 4,000 BCE in Babylonia. That`s a long time! Modern clay pipes are air-dried for at least 24 hours before they are fired in a kiln for at least 50 hours. Clay pipes are: [Green" – Terracotta pipes are made using recycled clay, water, and other organic materials. There`s no plastic or metals. Unaffected by acids – Unlike cast-iron pipes, which are prone to corrosion, clay pipes are naturally resistant to acidic wastewater. On the downside, clay pipes are heavy, difficult to work with, hard to transport, susceptible to roots and leaks, and can crush easily. If your clay pipes start to fail, most plumbers will recommend replacing the entire sewer line rather than repairing a small section. Cast-iron Pipes Cast-iron pipes are made of a metal alloy containing iron, carbon, and silicone. Because cast-iron is not malleable, meaning it cannot be hammered or pressed into shape, the pipes are cast in a mold before they are installed. Cast-iron pipes are: Long-lasting – With proper care, cast-iron pi
What Is The Right Size Pipe For Your Main Sewer Line? (Types And Repairs) - 3
2022 / 10 / 15
Plastic (PVC and ABS) Pipes In the early 1970s, PVC (polyvinyl chloride) pipes became the most popular choice for drain and sewer pipes. Plastic sewer pipes are simple to install, cheap, and easy to transport. They fit together tighter, and tree roots rarely get into the joints. Another common type of plastic pipe is ABS (acrylonitrile butadiene styrene). These pipes look like regular PVC pipes, except they are black and slightly softer. ABS is stronger than PVC, but they still come with a few drawbacks. For example, ABS pipes are often not permitted by building codes because they used to be made with a recycled plastic resin that polluted the ground. ABS pipes can also warp and deform if they`re exposed to certain temperatures. How Do You Repair The Main Sewer Line? There are several ways to repair the main sewer line underneath your home. Two of the best solutions include pipe lining and pipe bursting. Pipe lining involves inserting an epoxy-impregnated liner into your old crumbling pipe. Then, the liner is inflated, creating a new pipe directly inside your old one. Pipe-bursting is a little different. Instead of inflating a new pipe inside your old one, a brand new pipe is pushed into your old one. Your old pipe is broken apart as the new pipe replaces it. (The End.)
What's the difference among PPAP, PAPP And DPP flame retardant?
2022 / 10 / 15
We believe that you have seen PPAP, PAPP and DPP in various websites and documents. Many people have only heard of Piperazine pyrophosphate. So which one is the abbreviation of Piperazine pyrophosphate? The answer is all. Just because there is no standard terminology, the name is different (the English abbreviations in many documents are inconsistent) Piperazine pyrophosphate, also known as polypiperazine phosphate, is a new type of environmental protection flame retardant, which combines acid source, gas source and carbon source, and has excellent charcoal-forming and flame retardant properties. Can be used in flame retardant polypropylene (PP), polyethylene (PE), acrylonitrile-butadiene-styrene (ABS), epoxy resin (EP) and polyurethane (PU) and other materials, is a halogen-free flame retardant with great development potential. When it comes to expandable flame retardant, it is necessary to talk about the expandable flame retardant composed of ammonium polyphosphate (APP) as an acid source.Compared with APP-based FR, the flame retardant effect of piperazine pyrophosphate system is better than that of ammonium polyphosphate complex system, and the heat stability is also higher. When it comes to PPAP flame retardant, Adeka is the most familar brand for most people. In China, there are not many factories to produce PPAP flame retardant, Shandong Novista Chemicals Co., Ltd (Novista Group) is the few one among them. Novista has PNPO-G1 and PNPO-G2 product which are based on Piperazine pyrophosphate, and are per
Flame Retardant Nylon Has A Long Way To Go
2022 / 10 / 15
Poly amide commonly known as nylon. Nylon is a thermoplastic engineering plastic containing amide bond (-NHCO-) in the molecular main chain. Since its introduction by DuPont Corporation in 1930, it has developed into a wide variety of engineering plastics in the world, and its total output ranks first in the world. The main varieties are: PA6, PA66, PA610, PA12, PA1010, PA43, etc. Among them, PA6 and PA66 are the most successful in commercial production and practical application. PA material vertical burning level reaches UL94 V-2, limit oxygen index is approximately 24%, self-extinguishing at room temperature, which means it has certain flame retardant performance. But with the expansion of the scope of application, like electronic appliances and building areas. The flame retardant performance put forward higher request for PA, the vertical level should be reach UL94 V-0, and LOI above 28%. The methods for preparing flame retardant polyamide: ① Using additive flame retardants. Flame retardant is added to polyamides by mechanical mixing to make them flame retardant. Adding certain proportion of APP/ talcum powder into PA6 can make PA reach UL94 V-0. The advantages of this method are easy to use and wide application. But it has a great impact on the performance of the polymer. The main additive flame retardants for polyamides are double loop octane (hexachlorocyclopentadiene) , ammonium polyphosphate, decabromodiphenylethane and so on. The use of additive flame reta
Development Trend Of Halogen-free Flame Retardant Nylon
2022 / 10 / 15
In any case, halogen-free flame-retardant Nylon is definitely the best choice in the future, halogen-free options mainly are red phosphorus, melamine Cyanurate and Aluminum Diethyl Phosphinate ADP. China is the world's largest phosphorus resource, so phosphorus has a huge cost advantage, high flame retardant efficiency, more widely used. Manufacturers of environmentally friendly flame retardants know that red phosphorus forms phosphoric acid after thermal decomposition. On the one hand, phosphoric acid as dehydrating agent promotes the formation of carbon.The formation of carbon reduces the heat transfer from flame to condensed phase. Phosphoric acid, on the other hand, can absorb heat by reducing the heating process by preventing CO oxidation to CO2. The flame retardant mechanism of endothermic and condensed phase was used. The color of red phosphorus limits it to dark Nylon products such as black or red, so melamine Cyanurate is generally used in light color or transparent Nylon. Melamine Cyanurate mainly include melamine cyanuric acid (MCA), melamine polyphosphate (MPP), etc., with low toxicity, low corrosion, high flame retardant efficiency, no conflict with additives and other advantages. When used alone in PA, it will reach UL94 V-0. After thermal decomposition of melamine Cyanurate, part of the heat is taken away, and the surface temperature of PA decreases. From t
2022 / 10 / 15
Chlorinated polyvinyl chloride(CPVC) is produced by chloridized with polyvinyl chloride(PVC) resin,it is deemed as a kind of new engineering plastic.The product is white or faint yellow powder or loosen granules which is tasteless,odourless,and nontoxic.After being chloridized,molecular chain of PVC resin irregularly increases,molecular chain increases,which increase the solubility of resin and chemical stability,so as to improve the heat resistance,acid resistance,alkali resistance,salt resistance,oxidzing agent resistance and other corrosion resistances.
What Is The Trend Of Halogen-free Flame Retardants For Polyamide?
2022 / 09 / 24
Polyamide halogen-free flame retardants are definitely the best choice in the future, and the main choices are red phosphorus and melamine salts. China is the world's largest country of phosphorus resources, so red phosphorus has a huge cost advantage. Red phosphorus has high flame retardant efficiency and is widely used. Manufacturers of environmentally friendly flame retardants know that red phosphorus is thermally decomposed to form phosphoric acid. On the one hand, phosphoric acid acts as a dehydrating agent to promote the formation of carbon. The formation of carbon reduces the heat transfer from the flame to the condensed phase; on the other hand, phosphoric acid can absorb heat because it prevents the oxidation of CO to CO2 and reduces the heating process. Use endothermic and condensed phase flame retardant mechanism for flame retardant. However, the 2010 Panasonic incident make people worry about the security of red phosphorus flame retardants, because red phosphorus will cause certain potential safety hazards to the performance of the product. On the other hand, the color of red phosphorus also limits it to dark polyamide products such as black or red. Therefore, melamine salt is generally used for light-colored or transparent halogen-free flame-retardant polyamide. Melamine salts mainly include melamine cyanurate (MCA), melamine polyphosphoric acid (MMP), etc., which have the advantages of low toxicity, low corrosion, high flame retardant efficiency, and n
What Are The Main Components Of Flame Retardants?
2022 / 09 / 24
There are many types of flame retardants, and the general development can be divided into two categories: organic flame retardants and inorganic flame retardants according to composition analysis. One of the organic flame retardants mainly includes halogen flame retardants, phosphorus-nitrogen flame retardants, organic phosphorus flame retardants, and silicone flame retardants. We select several types of questions for technical introduction on the research of flame retardant mechanism of flame retardant. Halogen-based flame retardants are an important component of organic flame retardants, and their main components are halogen-based organic compounds. The free radicals generated by polymer degradation at high temperatures are the factors that maintain the combustion of organic compounds, while the hydrogen halide gas generated during the thermal decomposition of halogen flame retardants can capture free radicals, thereby preventing the flame from spreading. In addition, hydrogen halide itself cannot burn and is denser than air. It forms a gas barrier on the surface of the polymer material, which prevents the polymer material from contacting oxygen. Phosphorus nitrogen flame retardants are mainly composed of phosphorus and nitrogen. These flame retardants are also called intumescent flame retardants, because when they are heated, they can produce a uniform layer of carbon foam on the surface of the flame retardant, which acts as a heat and oxygen barrier. Intumescent flame retardant systems generally consist of an acid source (dehydrating agent), a carbon source (carbonizing agent) and a gas source (nitrogen source, blowing agent). After heating, the esterified polyol and inorganic acid, which can be used as a dehy
Why Does Halogen-free Low-smoke Flame-retardant Cable Crack?
2022 / 09 / 24
The main reasons for environmental stress cracking of halogen-free low-smoke flame retardant materials are as follows: (1) Caused by the characteristics of the polymer: due to the high content of flame-retardant fillers such as aluminum hydroxide and magnesium hydroxide, the strength of the polymer is reduced, the elongation and flexibility are also reduced, and the tear resistance and crack resistance are inherently insufficient . Currently, the carriers of halogen-free materials are usually low-density polyethylene and EVA. After being flame-retardant, the hardness of the mixture is higher, especially reaching the flame-retardancy of iec332-1 (single burning level, the corresponding oxygen index of the material is generally greater than 28), and the hardness of the material is often greater than Shore a90. (2) Material extrusion process: Based on the high filling characteristics of metal hydrate flame-retardant, halogen-free and low-smoke materials. If the process temperature and screw compression ratio are not properly selected during the extrusion process, the hydrous oxide will decompose and the polymer bond will break under high shear. Due to the large compression ratio, the speed of the extruder cannot reach the normal level, resulting in a long residence time between the barrel and the screw. At high temperatures caused by friction, hydrated oxides decompose prematurely, creating bubbles (
PVC Compounds for Weather Resistant Applications - 1
2022 / 09 / 23
Flexible PVC is an inherently weather resistant material. Like all thermoplastics, however, it can be affected by weathering - a general term used to cover a wide range of outdoor environmental conditions. Various additives are available to improve a compound's weather resistance. Before selecting a compound and additives, it is important to fully consider the environment that will be surrounding the end product and the other desired physical properties of your application. Factors Influencing Weathering of Flexible PVC The following environmental factors should be considered when selecting a flexible PVC compound for your weather resistant application. Sunlight Temperature Moisture Wind Gases
PVC Compounds for Weather Resistant Applications - 2
2022 / 09 / 23
Moisture Rain and humidity are the two main contributors to moisture. Humidity keeps the material constantly moist, which can cause growth of bacteria as well as plasticizer leaching. Rain has a washing and impacting effect that could be detrimental to the material. Wind Wind is a carrier of particles such as dust, gases and moisture that can contribute to weathering effects on the material. Similarly, the absence of wind can allow the accumulation of air contaminants which could also contribute significantly to the weathering of a material. Gases In industrial areas especially, gases are present, possibly causing a chemical reaction with some materials which results in color changes or degradation. Location The geographical location i
PVC Compounds for Weather Resistant Applications - 3
2022 / 09 / 23
Fillers Flexible pvc compounds have excellent impact resistance. However, when the end use application will be used under extreme outdoor conditions, fillers are added to perfect surface gloss, mechanical profile properties, color, weathering properties, etc. Filler types include carbon black, aluminum hydroxide, talcum and calcium carbonate. UV Stabilizers UV stabilizers slow or stop the degradation process by reacting with radicals. The formulation of the stabilizer is specifically designed upon data about geographic location, weathering conditions, application type and expected life time. A well balanced incorporation into the compound is essential because the stabilizers can impair the flame resistant properties of a product. UV Light Absorbents Absorbents convert UV radiation into thermal energy which then disperses throughout the material. The performance of light absorbents alone is generally not sufficient for applications with extreme weathering conditions. Common types of UV light absorbents include:
PVC Compounds for Weather Resistant Applications - 4
2022 / 09 / 23
Antimicrobials These agents are added during the compounding process to prevent the growth of bacteria and fungus on products used in moist environments. Microbial growth can shorten the product life of plastic parts and can manifest itself as odor, discoloration, loss of properties, or loss of function. Weather Testing Weather testing helps ensure that materials and products meet their expected functionality and lifetime even in extreme weather conditions. The three main types of weather testing include: Natural Outdoor Testing This form exposes the material to sun and weather directly. Two benchmark climates are typically used for products sold in the US: Arizona (hot and dry) and Florida (hot and moist). Other sites can be used to simulate other climates. Natural outdoor testing usually isn't the most effective method due to time and logisti
Flexibility of CPVC in Manufacturing
2022 / 09 / 17
Flexibility of CPVC in Manufacturing CPVC is suitable for a variety of parts manufacturing processes, including extrusion, injection molding, thermoforming, and compression molding. CPVC parts can be fabricated into assemblies by a variety of options including solvent welding, hot plate welding, rod welding, and extrusion welding. CPVC provides a number of benefits over other materials in parts manufacturing. ✔ Mold shrinkage/appearance - Because it is a rigid amorphous thermoplastic, CPVC generally has much less mold shrinkage than many other materials and produces parts with a smoother glossier surface. ✔ Thermoforming - CPVC gives manufacturers the ability to extrude sheets and re-mold them into other shapes. ✔ Vacuum forming - CPVC can be extruded into sheets and vacuumed down into different molds, offering a fast and flexible solution to many applications, such as signage, trays and shells. ✔ Foaming for lightweight applications - Amorphous materials such as CPVC can be extruded as foamed material, for a variety of lightweight applications. Polystyrene-like packaging can be manufactured and used with the inherent fire repellent properties of CPVC. ✔ Weldability - CPVC can be welded with solvents or with a variety of common welding techniques including hot-plate welding, rod welding, and extrusion welding. ✔ Recycling - CPVC can be reheated and remoulded after initial processing, minimising wastage in the manufacturing process. Finding flexibility in material engineering not only saves valuable time and energy for manufacturers, it boosts the potential of any product portfolio, adding another layer of strength, stability or safety to a product that most polymers simply cannot achieve.
2022 / 09 / 17
CPVC resins require compounding with a variety of additives in order to make them processable into parts. These additives can take a number of forms: Heat stabilizers - to protect the polymer during high-temperature processing UV stabilizers - to protect the polymer for outdoor applications Impact modifiers - to improve durability and strength Processing aids and lubricants - to assist with the formation of products Pigments - to achieve desired plastic colour The following characteristics can be scaled up or down depending on the quantity of additive in the material compound. It is worth keeping in mind that there is always a balance to be addressed, between the inherent strengths of CPVC and desired additive effect. Tensile strength Heat distortion temperature Long term creep performance Flame & smoke performance Impact strength Ductility Processability
2022 / 09 / 17
Flexibility of CPVC Resin CPVC resin is created through chlorination of the PVC molecular chain. Chlorine atoms surround the chain, stiffening the carbon backbone and driving the softening temperature higher. CPVC resin, when specified for material compounds provide a number of advantages: Heat resistance Fire and smoke characteristics UV resistance Resistance to corrosion Weatherability Environmental benefits Resins can be created at varying molecular weights and chlorine contents which can vary its properties. Varying molecular weight allows for a range of mechanical strength, while varying chlorine content allows for a range of heat and fire resistance. The range of grades available makes CPVC adaptable to a variety of parts manufacturing processes, including extrusion, injection molding, thermoforming, and compression molding.
[Vietnam Customs Authorities] Decree No. 111/2021/ND-CP on goods labels
2022 / 09 / 17
[Vietnam Customs Authorities] Decree No. 111/2021/ND-CP dated December 09, 2021 on amendments to some articles of Government`s Decree 43/2017/ND-CP on goods labels According to article 10 in the Decree from Vietnam customs document No. 111/2021/ND-CP, the following information on the original label of goods imported into Vietnam must be written in Vietnamese or foreign language while following customs clearance procedures: a) Name of the goods; b) origin of the goods; In case of unknown origin of goods, the country from which the last stage of finishing the goods is performed; c) The name or abbreviated name of the manufacturer or the entity responsible for the goods in the foreign country;
Why should work sites use recycled PVC for materials?
2022 / 09 / 17
The use of plastics in street and road works is often unavoidable, with durable materials required to keep the public and workforce safe. Traditionally, plastic has been a top choice for products use in street works, construction sites and events due to its durability and realiability. As pressure rises to reduce our impact on the environment, finding the most sustainable product is high on the agenda for many site mangers. What is recycled PVC? In many of plastics products, recycled PVC is material from discarded or semi-finished PVC items. Rather than send this material to landfill, it is instead used within a new product. As restrictions around plastic usage rise, with many pushing for increased traceability and a circular economy, recycled PVC can ensure sites are both compliant and environmentally friendly. PVC`s advanced mechanical recycling properties, combined with the large volumes of waste available, make it a well-suited material for work site products. Recycled PVC production saves up to 90% more energy than virgin PVC production, preventing a substantial amount of greenhouse gases, contributing to the preservation of natural resources and reducing landfill volumes of PVC.
2022 / 09 / 17
Beginning in the 1990s, the additive brominated flame retardant HBCD has gradually been used in building insulation materials throughout the world, and its usage has gradually increased. However, international studies have found that HBCD itself is toxic and has the potential for long-distance environmental migration, which can affect the regional and global environment through air, water or migratory species. The "Stockholm Convention on Persistent Organic Pollutants" is the third international convention with mandatory requirements adopted by human society to protect the global environment after the "Convention for the Protection of the Ozone Layer" and the "Framework Convention on Climate Change." China joined the Convention in 2001 and, as the first signatory, has taken vigorous actions to protect human health and the environment from persistent organic pollutants (POPs). In May 2013, the parties agreed to list HBCD as a newly listed POPs in Annex A of the Stockholm Convention on Persistent Organic Pollutants and take actions to ban or eliminate them globally. From December 26, 2016, China banned the production, use, import and export of HBCD. Among them, HBCD used for building insulation materials EPS (expanded polystyrene) and XPS (extruded styrene) has a 5-year exemption period, which will end on December 25, 2021. Novis
How To Test The Flame Retardant Effect Of Flame Retardant Fabrics?
2022 / 09 / 17
At present, the flame retardant effect test methods of flame retardant fabrics mainly include the following: Limiting oxygen index (LOI) method: LOI refers to the minimum oxygen concentration required to maintain the candle-like burning of the fabric when combustion occurs in a mixture of oxygen and nitrogen. The larger the limiting oxygen index, the better the flame retardant effect of the fabric. This method is suitable as a test method in scientific research and is not often used in the production of flame-retardant fabrics. Vertical combustion method: refers to the use of a specific ignition source (flame height 40mm) to burn the vertical fabric fixed in the U-shaped clamp at the center 20mm away from the bottom edge of the fabric, and pass the inspection of the fabric within the specified burning time. A method to test the flame retardant properties of flame-retardant fabrics by indicators such as burning state, continued burning time, smoldering time, and damage length. The vertical combustion method is widely used in the flame retardant test of flame retardant fabrics in most countries. 45° inclined plane combust
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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.