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Brief introduction of Calcium Zinc Stabilizer
2018 / 10 / 16
Calcium Zinc Stabilizer is one of the most successful developments in recent years. It has been the progress made in solid Ca Zn stabilizer formulations to replace lead on a cost-effective basis. It has also been important that the components of these systems have a satisfactory low-toxicity profile. Ca Zn formulations are a complex blend consisting primarily of: • Calcium soap (stearate or laurate) • Zinc soap (stearate or laurate) • Acid scavengers such as a hydrotalcite, zeolite, and metal oxides/hydroxides • Organic co-stabilisers such as the diketone stearoyl benzoylmethane • Antioxidant • Polyols, and so on. Calcium stearate acts as an acid acceptor in addition to providing lubrication. Zinc stearate is used to improve initial and early colour, in combination with the co-stabiliser. This functions by the co-stabiliser complexing the zinc stearate and so preventing the early formation of zinc chloride, which is a prodegradant. It should also be noted that PVC resins may react differently in the presence of zinc (zinc sensitive) and this has an influence on stabiliser formulations. Synthetic hydrotalcites and zeolites (already used in other industries) have been developed for use in PVC stabilisation. These form addition complexes a
NSF CERTIFICATE FOR CPVC COMPOUND
2018 / 10 / 15
Novista NSF certificate for Cpvc Compound is under process, welcome related end-users ask us if you need NSF. ---Novista Group Co.,Ltd
Heat stabilizer market ready for product changes
2018 / 10 / 13
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 over lead and tin stabilizers. They combine easy handling with good final product properties and excellent outdoor weathering performance. Like lead stabilizers, the are mostly offered as customized one packs. On the other hand, they are more product-specific, often requiring custom formulation for individual applications, when compared to lead-based stabilizer systems. The cost of CaZn stabilizers is now similar to lead stabilizers. To get the complete picture, prices should be compared based on a similar unit length of final product. At first glance
flame retardant uses and benefits
2018 / 10 / 13
When added to different materials, flame retardants can help prevent fires from starting or limit their spread. According to the National Fire Protection Association (NFPA), in 2012, more than 1.3 million fires were reported in the United States, causing 2,855 civilian fire deaths, 16,500 civilian injuries and $12.4 billion in property damage. The use of flame retardants is especially important today, as the large volume of electrical and electronic equipment in today`s buildings, coupled with a larger volume of combustible materials, can increase the potential for fire hazards. Flame retardants provide consumers with a critical layer of fire protection and are vital to reducing the risks associated with fire. Today, flame retardants are used in four major areas: Electronics and Electrical Devices Flame retardants can enable modern electronic equipment, like television, and computers, to meet fire safety standards and are vital to the safety of hundreds of these products. B
3 Surprising Benefits of Using Flame Retardant at your House
2018 / 09 / 29
Flame retardants are products in a home that contain chemicals to decrease or eliminate their flammability, and they work in three different ways to inhibit or minimize the severity of a fire. A flame retardant will decrease the presence of oxygen as well as gasses located close to items that are burning. It will inhibit a material`s ability to ignite. Flame retardants also provide a layer of fire resistant material on a product. 1. Fire Prevention Flame retardants are able to provide a number of consumers products with an essential layer of fire protection. According to FireTect, flame retardants are able to stop fires from starting as well as limit their spread and decrease the amount of damage resulting from a fire. Some are designed to work on their own and others act as a synergist. This means they can increase the fire protective abilities of other types of flame retardants. Product manufacturers use a variety of flame retardants. The materials are very different in their chemical composition and physical nature. Various flame retardants react in different ways with fire. This is why so much care is taken to carefully match a flame retardant to the correct material. They all interact at various stages of a fire`s cycle. A home today contains a number electronic devices such as computers, televisions, microwaves and more. This has resulted in high amounts of composite and plastic materials available in a home. It has significantly increased the fire hazard potential. Flame retardants are becoming increasingly essential to minimize fire damage. They have been able to provide sufficien
what is Methyl Tin Stabilizers
2018 / 09 / 28
Methyl Tin Stabilizers are the new industry standard for providing heat stability in PVC applications. Its effecient heat stabilizing property is used for processing of PVC plastics` in applications such as extruding, molding, coating, injection and calendaring. Methyl Tin Stabilizers provides excellent retention of the initial color along with superior and dynamic heat stability, transparency and weather proofing. Methyl Tin Stabilizers is considered as the most effective stabilizer because of its high performance and environment-friendly feature. Methyl Tin Sabilizers reduces carbonization in a remarkable way.These features of Methyl Tin Stabilizers have enabled it to replace other high-toxic PVC stabilizers in day-to-day applications. Methyl Tin Stabilizers are approved by FDA as well as BGA including other regulatory agencies, this means that they can be used in applications that have direct food contact. Applications: PVC/CPVC Pipes and Fittings, PVC Film, Hose Pipes, Soft Tubes, Compound. For more details, welcome to contact: mandyzhang@novistagroup.com
2018 / 09 / 18
TP-20 is our Acrylic processing aid based on a low molecular weight acrylic polymer resin. As the PVC processing aid, it can be used in PVC formulations to improve the processability and the surface quality. It is White free-flowing powder, bulk density 0.40-0.55g/cm3, can not be dissolved in water, ethanol, but can be dissolved in chloroform and Methyl Ethyl Ketone. It is widely used in the processing of many rigid and flexible PVC products made by blow molding, calendering, extrusion and injection molding. It is recommended to use in PVC Sheets, film, bottles, and transparent pvc products. Transparent PVC product especially.
5 Major Categories of Flame Retardants
2018 / 09 / 15
From mattresses to televisions, children`s toys to carpet padding, we are surrounded by products that contain flame retardants. These chemicals are added to materials or products to prevent or slow the spread of fire. They are broken down into the following 5 major categories: 1. Halogen: Within this class of flame retardants includes chlorine-based systems but perhaps the most well-known are Bromine Flame Retardants (BRFs). BFRs are commonly used by those within the electronics industry and also within textiles, construction products, and coatings. Bromine is used because it releases active bromine atoms into the gas phase before the material reaches its ignition temperature, which quenches the chemical reactions occurring within the flame. This can prevent the burning process from occurring or can slow it such that other measures can be taken to extinguish the fire. This is an example of the vapor phase inhibition approach. One major issue with this type of flame retardant is they are becoming increasingly banned within products due to safety concerns. The RoHS directive, for example, specifically limits the amount of polybrominated biphenyls and polybrominated diphenyl ethers that can be found within appliances, IT equipment, lighting equipment, medical devices, toys, and semiconductors, amongst other product categories.
The importance of environmental awareness in PVC products
2018 / 09 / 14
From the beginning of twentieth Century 80 years, countries around the world have proposed to prohibit the use of lead salt stabilizer, cadmium salts requirements: A, Europe a ,European Standardization Committee approved EN71-3 standard in March 11, 2000, restrictions on soluble eight heavy metals, including lead limit was 90mg/kg; b ,The European Parliament and in 2000 passed the environmental bill 76/769/EEC-PVC material requirements of environmental protection green book, starting from August 2003, in electrical materials banned the use of lead salt and other 18 kinds of harmful substances, in 2015 to prohibit the use of lead salt stabilizer; c ,The European Union in January 27, 2003 promulgated the "restrictions on the use of certain hazardous substances in electrical and electronic equipment" (RoHS), clearly defined,From July 1, 2006 onwards, all in the EU market of large, small household appliances, IT and remote equipment, communications equipment, audio visual equipment, lighting equipment, electrical and electrical tools, toys and leisure and sports equipment, vending machines, eight kinds of electromechanical products shall not contain lead, mercury, cadmium, hexavalent chromium, PBB six, PBDE six, etc. hazardous substances; d ,In 2005 July 6, the European Parliament and the Board issued "on the development of energy consuming product design requirements for environmental protection framework directive 2005/32/EC" (EuP), which in order to improve the overall environmental performance of products, to ensure the security of energy supply, the directive covers all can use products. The production of China's plastics industry impact will be compared to RoHS and REACH regulations more serious; e ,In 2006 22 months 28 days of the European Parliament and the Council of the European Union and put forward "on chemicals registration, evaluation, authorization and restriction sy
What is Calcium-Zinc stabilizer (Ca/Zn stabilizer) ?
2018 / 09 / 11
Calcium/Zinc stabilizers are generally classified into solid and liquid calcium zinc stabilizers. The Calcium-Zinc stabilizer is synthesized by a special compounding process mainly composed of a calcium salt, a zinc salt, a lubricant, an antioxidant, and the like. It can not only replace toxic stabilizers such as lead and cadmium salts and organotins, but also has good thermal stability, light stability and transparency and tinting strength. Practice has proved that in the PVC resin products, the Ca/Zn stabilizer has good processing performance, and the heat stabilization effect is equivalent to the lead salt stabilizer, and is a good non-toxic stabilizer. Solid product The appearance of the calcium-zinc stabilizer is mainly white powder, flake, and paste. Powdered calcium-zinc stabilizer is used as the most widely used non-toxic PVC stabilizer, and is often used in food packaging, medical equipment, wire and cable materials, etc. PVC calcium-zinc stabilizers for rigid pipes have also appeared on the market. The thermal stability of powdered calcium-zinc stabilizer is not as good as that of lead salt stabilizer. It has certain lubricity, poor transparency and easy to blooming. In order to improve the stability and transparency, an antioxidant such as a hindered phenol, a polyhydric alcohol, a phosphite, and a β-diketone is often added to improve. The two major systems of
flame retardant necessity for Polyurethane (PU) Products
2018 / 09 / 08
What are polyurethane products? Polyurethanes refer to a wide range of products that include flexible foams used in furniture and automobiles, rigid foams used as building insulation, durable coatings, adhesives and sealants, and even certain items of apparel. Can
The use of PVC Ca-Zn stabiliser
2018 / 09 / 07
The use of calcium/zinc stabiliser systems has been common in PVC applications for over 25 years. These materials are generally based on metal carboxylates and will sometimes incorporate other elements to boost performance such as aluminium or magnesium. Because the heat stability in some applications may require some enhancement when using calcium/zinc, organic co-stabilisers will also often be added to this type of formulation. These materials include polyols, epoxydised soya bean oil, antioxidants and organic phosphites. Properties and Applications Because of the characteristics of calcium/zinc stabilised materials they are widely used in many flexible and rigid PVC applications. This type of stabilising system can give products which have a high degree of clarity, good mechanical and electrical properties, excellent organoleptic properties and good outdoor weatherability. As a result, calcium/zinc stabilisers have been incorporated and established in a wide range of applications as shown in table two. These include toys, healthcare products, such as blood bags, semi-rigid and flexible foil for food packaging, bottles for potable water, as well as for potable water pipe. The performance
2018 / 09 / 04
ASA is the acronym for acrylate rubber modified styrene acrylonitrile copolymer. ASA is a terpolymer that can be produced either by a reaction process of all three monomers or by a graft process. ASA is usually made by introducing a grafted acrylic ester elastomer during the copolymerization of styrene and acrylonitrile, known as SAN. The finely divided elastomer powder is uniformly distributed and grafted onto the SAN molecular chains. The outstanding weatherability of ASA is due to the acrylic ester elastomer. ASA polymers are amorphous plastics, which have mechanical properties similar to those of the ABS resins. However, the properties of ASA are far less affected by outdoor weathering. ASA resins are available in natural, off-white, and a broad range of standard and custom-matched colors. ASA resins can be compounded with other polymers to make alloys and compounds that benefit from ASA's weather resistance. ASA is used in many products including lawn and garden equipment, sporting goods, automotive exterior parts, safety helmets, and building materials.
How to Join a PVC Pipe With a CPVC Pipe
2018 / 08 / 31
How to Join a PVC Pipe With a CPVC Pipe? At first glance, PVC and CPVC pipe look the same, but they aren`t. Although they are both a type of plastic plumbing pipe, they vary in composition and outside diameter. For this reason, you cannot simply join the two types of plastic with a coupling. You can, however, solvent-weld a special fitting designed to compensate for the diameter difference. When solvent-welding PVC to CPVC, you`ll need a primer and adhesive that will soften both types of pipe. Step 1 Prepare the pieces of the PVC-to-CPVC connection. Prime the first 2 inches of the exterior surface of the PVC and the CPVC pipes with the CPVC primer. Then prime the inside of the entire CPVC-to-PVC adapter. You will find the priming brush attached to the lid of the CPVC primer can. Step 2 Immediately apply a light coating of CPVC glue to the primed area of the CPVC pipe and the side of the CPVC-to-PVC adapter. Step 3 Slide the glued side of the CPVC adapter onto the glued end of the CPVC pipe and hold the adapter onto the end of the pipe for 30 seconds to bond the two pieces. Step 4 Apply CPVC glue to the exterior of the primed end of the PVC pipe and the PVC side of the CPVC-to-PVC adapter. Step 5 Insert the glued end of the PVC pipe into the glued open side of the adapter and hold for 30 seconds to complete the joining process.
MMA market analysis (30/08/2018)
2018 / 08 / 31
(MMA Factories operatin rate) The current shortage of Methyl Methacrylate (MMA) may get worse. A new study by IHS Markit (London) shows that the demand for this chemical has been increasing in the production of plastics, paints, coatings and adhesives, and that this chemical is due to operational problems in production and production facilities. The supply is limited. IHS Markit Global Acrylate and Superabsorbent Polymer (SAP) Market Consulting Services Company expects global demand for MMA to reach 3.7 million tons by 2018. By 2023, demand is expected to exceed 4.3 million tons, which is largely driven by growing demand for coatings and adhesives in China and elsewhere. In the next five years, the average increase in global demand will be slightly higher than 3%, while the more mature market will increase by 2% during this period. Their report shows that in the past 18 months, China's MMA prices have been rising steadily. In Western Europe and the United States, producers also benefit from higher prices during the same period. Since January 2017, European prices have risen by nearly 60%. In the same period, US house prices rose by nearly 20%. Denis Poussin, Head of global acrylate research at IHS Markit and lead author
What byproducts are found in smoke?
2018 / 08 / 25
The combustion of products that contain organic materials produce carbon monoxide, carbon dioxide, and water. So, for example, burning common materials like wood will produce these substances. Products that contain nitrogen will also produce certain amounts of hydrogen cyanide and nitrogen oxides. Common products that contain nitrogen include sheep`s wool, silk, and composite wood products using polyurethane binders. Smoke and byproducts from fires are toxic regardless of the source of those fires and what is being burned.
2018 / 08 / 21
Chlorinated polyethylene (CPE) is made from high density polyethylene (HDPE) polymers prepared by chlorination reaction. According to the different structures and usages, Chlorinated polyethylene resin can be divided into two categories: Chlorinated polyethylene (CPE) and Elastomer CPE (CM) . Resin CPE product is also known as type-A material and elastomer CPE rubber type-B material. Mainly used in wire and cable (mining cables, UL and VDE standards set forth in the wire), hydraulic hoses, automotive hoses, duct tape, plastic sheet, PVC profile pipe modification, magnetic materials, modification of ABS and so on. Rubber Type CPE In the late 1990 of 20th century, the growing domestic demand for high performance flame retardant rubber, especially the development of the wire and cable industry, auto parts manufacturing, have led the consumer demand for rubber-CPE. Rubber-CPE is a good comprehensive performance, heat aging oxygen-ozone, excellent flame retardant special synthetic rubber. Modification Type CPE Chlorinated polyethylene (CPE) is part of the polyethylene chain of hydrogen atoms replaced by chlorine atoms. Mass percentage of chlorine is generally 25%~45%.
2018 / 08 / 21
Calcium - Zinc stabilisers The use of calcium/zinc stabiliser systems has been common in PVC applications for over 25 years. These materials are generally based on metal carboxylates and will sometimes incorporate other elements to boost performance such as aluminium or magnesium. Because the heat stability in some applications may require some enhancement when using calcium/zinc, organic co-stabilisers will also often be added to this type of formulation. These materials include polyols, epoxydised soya bean oil, antioxidants and organic phosphites. Properties and Applications Because of the characteristics of calcium/zinc stabilised materials they are widely used in many flexible
2018 / 08 / 18
Measures which prolong escape time, such as introducing fire safe furniture, ensure that fewer people are killed or injured in fires. Flame retardants are an effective element to protect people from fires. They can significantly delay ignition in the early stages of a fire when it can still be extinguished, or occupants of a building can escape. Flame retardants can act in three different ways to stop the burning process and create such a delay. They may work to: 1. Disrupt the combustion stage of a fire cycle including avoiding or delaying [flashover," or the burst of flames that engulfs a room and makes it much more difficult to escape. 2. Limit the process of decomposition by physically insulating the available fuel sources from the material source with a fire-resisting [char" lay
Do you know these Properties of PVC Plastic?
2018 / 08 / 17
Do you know these Properties of PVC Plastic? PVC (polyvinyl chloride) is a type of plastic that finds extensive residential, commercial, industrial and military use. Comprising a wide range of materials and applications, including pipes, footwear and floor coverings, PVC plastic is used globally for its versatility, stability and good chemical and physical properties. Flexible PVC plastic compounds are used in communication wire coating, electrical wire jackets and coating, bumpers, wheels, outdoor furniture, medical tubing and meat wrap. Rigid PVC is used for water distribution pimping, chemical pumps and tanks, bathtubs, appliances, decorative trim and profiles, medical apparatus and house siding. Physical Properties PVC plastic is available as a cream-colored solid, white powder or thick white liquid (when diluted in water). It is combustible, stable and has a tensile strength of 6500 pounds per square inch, melts at 176 degrees Fahrenheit and can withstand temperatures between -13 and +158 degrees Fahrenheit. PVC plastic has a specific gravity of 1.34. (The specific gravity of a substance is its density compared with the density of water.) It is mechanically stable and exhibits a minimum or low change in mechanical strength or molecular structure. However, constant exposure to an exterior force can deform its structure. Chemical Properties PVC plastic is forme
2018 / 08 / 14
AC Blowing Agent AC blowing agent or azodicarbonamide is a chemical compound with the molecular formula C2H4O2N4. It is a yellow to orange red, odorless, crystalline powder,specific gravity of 1.66, nontoxic, stink-free, flammable, capable to generate tremendous froth. During decomposition, 32% weight decomposed into gas, 27% sublimed, 41% residues. Decomposition heat: 359.5 J/g; specific heat: 0.26; combustion heat: 1070 KJ/mol. Appearance:Yellow to orange red, odorless, crystalline powder Molecular formula: C2H4N4O2 Molecular weight: 116.08 CAS No.: 123-77-3 HS No.: 2927.0000.90 Function : capable to generate tremendous froth,Used in producing inflating agent of foam. Application : Suitable PVC,EVA,PP,PE,PS foaming products,especially suitable for WPC ,PVC foamed products.
2018 / 07 / 24
PVC additives Polyvinyl chloride (PVC) is a versatile and resource efficient thermoplastic with the widest range of applications of any of the plastics family making it useful in virtually all areas of human activity. Without additives PVC would not be a particularly useful substance, but its compatibility with a wide range of additives – to soften it, colour it, make it more processable or longer lasting, results in a broad range of potential applications from car underbody seals and flexible roof membranes to pipes and window profiles. PVC products can be rigid or flexible, opaque or transparent, coloured and insulating or conducting. There is not just one PVC but a whole family of products tailor-made to suit the needs of each application. Unlike most other thermoplastics, the majority of PVC applications have a lifetime of between 10 and 100 years. This requires proven durability and stabilizers play an important part in achieving such performance. All polymers require stabilizers of one sort or another; PVC is no different in this respect. Formulating PVC Products Before PVC can be made into products, it has to be combined with
The functions and categories of Acrylic Processing Aids
2018 / 07 / 17
(Acrylic Processing Aids from Novista Group) From the broad category, PVC processing aids ACR can be divided into three categories: 1. Promote plasticizing processing aids: This type is widely used in rigid PVC products. Its main function is to promote plasticization, improve melt rheological properties and improve the dispersibility of other additives, and improve the apparent quality of products. Applicable to most of the PVC products such as profiles, pipes, plates (rolls), reference dosage 1-2phr. 2. Foaming regulator: PVC foaming regulator can greatly increase the melt strength of PVC material due to its high molecular weight, thus effectively encapsulating the foaming gas to form a uniform honeycomb structure and prevent gas fro
2018 / 07 / 10
Chlorinated Polyethylene (CPE): (CH2-CHCl-CH2-CH2)n What is Chlorinated Polyethylene? Chlorinated Polyethylene is a family of thermoplastics that are produced by the chlorination of high-density polyethylene. Chlorine content can be as high as 70% by weight but most grades have chlorine content in the 20% up to 50% range. Properties CPE offer a range of properties and have inherent resistance to heat, oxidation, and ozone due to their saturated molecular backbone, which is further enhanced by molecular modification with chlorine. Advantages • Good anti-ageing property and excellent weatherability. • Good anti-combustion, no self-ignition • Good low-temperature flexibility. Used in UPVC products • Good endurance to chemicals. • Good processing ability. It`s easy to be shaped • Good stability What is it used for? Although it can be used by itself as special synthetic rubber, CPE is a versatile product that is compounded with other materials to achieve different properties and products. It is widely used as a thermoplastic elastomer (TPE), rubber and modifier for resins (PVC, PE and ABS) I
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