News_第39页_Novista Chemicals - The pioneer of Flame retardant

22 2022-4
The extrusion process of PVC door and window profile-2 （1） Temperature controlAfter PVC mixed powder enters the extruder, it should be compacted, transported, melted, homogenized and extruded at a lower temperature. In order to obtain high quality and high output profiles, the temperature of each section needs to be adjusted repeatedly and controlled accurately, so that the materials are always in the melting temperature and decom…
22 2022-4
The extrusion process of PVC door and window profile-1 1、 Production process The production process of PVC door and window profile mainly includes single screw extrusion process and twin screw extrusion process. The raw materials used in the two processes are the mixed powder prepared in the previous process according to a certain formula. At present, the extrusion line of hard PVC door and window profile mostly uses co…
16 2022-4
What are flame retardants? As the name suggests, flame retardants are additives used to prevent materials from being ignited and inhibit the spread of fire. They are mainly designed for the flame retardant of polymer materials. Generally speaking, flame retardants mainly play the role of endothermic, covering, chain inhibition and non-combustible gas suffocation to achieve the flame retardant effect. Mate…
16 2022-4
Flameout method of flame retardants 1. It produces a gas that smothers the flame. For example, antimony trioxide reacts with HCl from combustion in PVC to form a smoldering gas, namely antimony nitrogen oxide. 2. It can absorb the heat produced during combustion and cool down the combustion rate. For example, aluminum hydroxide contains up to 34% of chemically associating water in its molecules, which remains stab…
16 2022-4
Flame retardant Flame retardant is a kind of additive which can prevent the ignition of polymer materials or inhibit the flame propagation. Common and important flame retardants are compounds of phosphorus, bromine, chlorine, antimony and aluminum. Flame retardants can be divided into additive type and reactive type. The additive flame retardants mainly include phosphate ester, halogenated hydr…
15 2022-4
Heat stabilizer market ready for product changes-2 In terms of processing properties, the tendency of CaZn stabilizers to plate-out in tools and calibration has been reduced to the same level as lead. When processed with suitable lubricant systems, CaZn-stabilized profiles compare favorably with lead-stabilized profiles in terms of processability and surface gloss. Weathering performance is a critical issue in stabilization of b…
15 2022-4
Heat stabilizer market ready for product changes-1 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.
15 2022-4
PVC Stabiliser and the use PVC Stabilisers are added either directly into PVC or in combination to prevent oxidation, chain scission, uncontrolled recombination, and cross-linking reactions caused by photo oxidation. Essentially, they protect PVC from the harmful effects of extreme temperature and ultraviolet radiations. PVC Stabilisers are of different types like Heat Stabilisers which are mainly used in…