Technology Advisory_第4页_Novista Chemicals - The pioneer of Flame retardant

23 2021-11
Plastic Profile Extrusion Profile extrusion is a process by which various plastic materials are used to develop quality plastic products. These products have a continuous cross-section such as pipe, drinking straws, decorative molding, eavestroughing, window trimming and many others. The basic procedure of profile extrusion is that the polymer is melted into a hollow mold cavity, under the influence of h…
11 2021-11
Replacement of lead based stabilizers with lead free stabilizers-3 The other very new and emerging category of heat stabilizers is organic stabilizers. They are being developed as effective, safer and more eco-friendly additives for PVC processing. The major component acting as primary stabilizer and lubricant is Calcium Stearate. Other than calcium stearate organic stabilizers are based on various organic compounds like alkyl/aryl phosphites, …
11 2021-11
Replacement of lead based stabilizers with lead free stabilizers-2 Besides Ca-Zn stabilizers, organotin mercaptide based stabilizers are another choice. These are generally available in liquid form, but nowadays powder form is also available with some manufacturers. organotin stabilizers are very popular for transparent applications and rigid applications in America. They offer outstanding color retention in plasticized and rigid PVC processing…
11 2021-11
Replacement of lead based stabilizers with lead free stabilizers-1 Lead based stabilizers are being used from the very beginning to stabilize rigid PVC across the world. The decomposition temperature of PVC is much lower than its processing temperature. Thus, the processing of PVC requires heat stabilizers that do not allow HCl molecules to leave the polymer chain and increases the decomposition temperature.Lead based heat stabilizers provide e…
4 2021-11
Role of PVC Heat Stabilizers Poly(vinyl chloride (PVC) is one of the most important commercial plastic and its compounds have a great diversity of applications and methods of processing. But, PVC is thermally unstable at processing temperatures.The amount and type of energy input varies considerably among the many different production methods and end-use applications of PVC. In fact, resin degradation start…
4 2021-11
Types of Heat Stabilizers for Vinyl Compounds There are several basic groups of heat and light stabilizers currently offered to the vinyl industry which include:Mixed MetalsOrganic acid salts (liquid and solid), consisting of any one or a combination of barium, calcium, cadmium (disappearing), and zinc. Typically, C8 to C18 straight chain or branched chain aliphatic carboxylic acids are used. Aromatic (alkyl benzoic) acids …
4 2021-11
Impact of PVC Ingredients on Heat Stabilizers Selection The best approach in most cases is to check heat stability and color retention of the formulation with and without these additives. It helps to pre-determine the extent of any potential problem.Vinyl ingredients which can have a potential impact on PVC heat stability are discussed below:Vinyl ResinsThe wide variety of PVC resins is probably the single greatest factor which expla…
10 2021-9
HOW IS PVC USED Example of PVC Pipe UseFirst implemented in the 1920s, PVC is now heavily used within water delivery pipes, venting and duckwork for structures, appliances and equipment, plumbing conveyance of sewage and wastes, chemical fluid transfer, in construction engineering as well as an array of individual, unique items and consumer products. When used in applications, PVC is considered…
10 2021-9
PVC CHARACTERISTICS AND PROPERTIES PVC as a material is fairly durable, flexible, and resistant to many harsh working conditions that can involve chemicals, soil, water, wastewater and water pressure. As a plastic, PVC is naturally resistant to corroding, rusting and the effects of weathering, excluding PVC’s long term sensitivity to continuous ultraviolet (UV) sun exposure. Within chemical handling and processi…
10 2021-9
WHAT IS PVC | WHAT IS UPVC? PVC is the three-letter acronym used to describe polyvinyl chloride, a synthetic plastic and highly versatile material. PVC is widely used within modern society and sector applications as pipe for transporting fluids from water to chemicals to ingredients. uPVC stands for unplasticized polyvinyl chloride and is PVC without plasticizing (flexibility) agents added. PVC and uPVC is…
26 2021-8
The Function of PVC Stabilizers Without the addition of a stabilizer, PVC resins begin to degrade at temperatures of 160°C or more, the main re-action being dehydrochlorination.The results of measurement of the chlorine in the hydrogen chloride gas produced by the degradation of PVC during heating shows, as can be seen, the addition to the resin of a lead stabilizer reduces the amount of hydrogen chloride prod…
12 2019-12
Typical automotive parts made from PP Plastic parts are widely used in vehicle prodcution nowadays. PP, as a main plastic type, is the raw material for many automotive palstic parts. PP is combustile by nature. But people have high demand for the car's fire-resistance performance. So automotive PP needs flame retardants added, such as instrumental panel, door panel, cowl top, etc.
12 2019-12
Applications of flame retarded polyolefins POLYOLEFINS are very COMBUSTIBLE!! Flame retardants should be required for below polyolefins applications:1.wire and cable, such as PE cable, LDPE/EVA cable, PP cable……2.Automotive plastics. Many plastic parts in vehicles are polyolefins, such as Instrumental panel，Door panel，Cowl top……
2 2019-12
UL94 flame retardancy standard test method From lowest (Least flame-retardant) to highest (Most flame-retardant):HB: slow burning on a horizontal specimen; burning rate < 76 mm/min for thickness < 3 mm or burning stops before 100 mmV-2: burning stops within 30 seconds on a vertical specimen; drips of flaming particles are allowed.V-1: burning stops within 30 seconds on a vertical specimen; drips of particles allowed as l…
25 2019-11
Halogen Free Flame Retardant PP Composites PP flame retardant composites were prepared with polypropylene and different components by a twin-screw extruder under melting state. The effects of Mg(OH)2,POE and PP-g-MAH on the thermal behaviors, crystalline structure and micro structure of non-halogen flame retardant PP composites were characterized by differential scanning calormetry(DSC), polarized optical microscopy(POM)…
22 2019-10
this plastic’s on fire! 4 types of flame retardant plastic additives Like certain pop stars, plastics are generally flammable.Therefore it is often necessary to add flame retardant plastic additives to meet governmental and industry regulatory standards. Flame retardant plastic additives are compounds added to plastics and other materials to inhibit, suppress or delay combustion. These compounds are useful in impending burning in the ignition pha…
28 2019-9
What types of products use flame retardants?  While an ever-evolving list of new products—from hair dryers and small appliances to laptops and flat-screen televisions—is incorporated into our homes, offices and commercial environments, we seldom think about how the products are made.  Flame retardants provide consumers with a critical layer of fire protection and are vital to reducing the risks associated with fire.T…
7 2019-9
Halogenated Flame Retardants Halogenated FR additive benefits:  Very effective at lowering flammability in a wide range of polymers. Provide good fire performance even after repeated recycling of polymer + FR resin.Halogenated FR additive drawbacks:
26 2019-8
General Flame Retardant Classes 1. Gas Phase Flame Retardants (ex. Halogen, Phosphorus)- Reduce heat in gas phase from combustion by scavenging reactive free radicals, thus inhibiting combustion.2. Endothermic Flame Retardants (ex. Metal Hydroxides, Carbonates)- Function in Gas Phase and Condensed Phase by releasing nonflammable gases (H2O, CO2) which dilutes the fuel and cools the polymer.3. Char Forming Fla…
19 2019-8
How do flame retardants work? Flame retardants are added to different materials or applied as a treatment to materials (e.g., textiles, plastics) to prevent fires from starting, limit the spread of fire and minimize fire damage.  Some flame retardants work effectively on their own; others act as “synergists” to increase the fire protective benefits of other flame retardants.