News_第45页_Novista Chemicals - The pioneer of Flame retardant

24 2022-2
Heat Stabilizers for PVC: A complete guide-2 What are Heat Stabilizers?Heat stabilizers are additives that are intended to shield polymers from the degrading effects of heat at the time of processing or use. Role of Heat Stabilizer in PVC processingPolyvinyl chloride or PVC has a maximum operating temperature of around 60°C (140°F). At this temperature, the heat distortion of PVC begins. As PVC starts getting heated up to …
24 2022-2
Heat Stabilizers for PVC: A complete guide-1 Polyvinyl Chloride a.k.a. PVC, a long chain of vinyl chloride, finds numerous applications in commercial, industrial, and medical products. Before exploring the world of heat stabilizers used for PVC, let's start with the basics of this resourceful polymer. What is PVC?Polyvinyl chloride or PVC is the world's third-most widely produced synthetic plastic polymer; the first two be…
19 2022-2
Why Insulation Tapes Can Be Flame Retardant? 1. Backing is Flame Retardant2. Add Flame Retardant into Adhesive- Chlorides- Bromides- Nitrides/ Phosphides
19 2022-2
The insulation tape is to be judged as flame retardant 1. Can not continue to flame longer than 60s after any of five 15s applications of test flame.2. Can not ignite the cotton on the burner, wedge or floor of the enclosure.3. Less than 25% of the indicator flag burned away after any of five 15s applications of test flame.Novista Group supplies equivalent of FP-2100JC, FP-2200S, FP-2500S, Exolit OP1230, OP930, OP1312, OP1314 to glo…
19 2022-2
Why the extremely flammable Red Phosphorus is also a flame retardant? Red phosphorus is extremely flammable - the main raw material for making matches. It may seem inconceivable to use red phosphorus as a flame retardant, but red phosphorus is indeed an efficient flame retardant, especially in plastics; but in resins, red phosphorus and other phosphorus-containing flame retardants function The process is not a simple oxidation, and the phosphorus-…
18 2022-2
What happens in Foamed Polyvinyl Chloride?-3 Although, it is an internal lubricant only that promotes plasticization, improves polymer fluidity and the surface finish of products. External lubricant like PE wax is used to reduce the friction between the polymer and the surface of the machine to prevent it from adhering to the mechanical surface. High melt OPE waxes, provide good lubrication in middle and late processing. L…
18 2022-2
What happens in Foamed Polyvinyl Chloride?-2 Organotin stabilizers are usually used for rigid foam boards. The majority of tin stabilizers used are tin mercaptides. They are cheaper than tin carboxylates and give excellent heat stability but poor weatherability. Also, they don’t act as kickers for ADC decomposition. Hence, formulations based on tin mercaptide, which are used for the majority of non-weathering foam sheet p…
18 2022-2
What happens in Foamed Polyvinyl Chloride?-1 Foamed or Microcellular Polyvinyl Chloride (M-PVC) is formed by a process called nucleation. Homogenous microcellular foams, with an average cell size of the order of 10 microns, can be produced in PVC by the process of nucleation. In this process, gas is dissolved under high pressure into the liquefied U-PVC as it's undergoing the extrusion process. This causes the uniform crea…