News_第35页_Novista Chemicals - The pioneer of Flame retardant

8 2022-6
Role of stabilizer in retaining underwater volume resistivity The main function of heat stabilizers for Polyvinyl chloride is to slow the degradation process of PVC and make processing of polymer easy, like all other ingredients of compounding formulations, PVC heat stabilizers also affect the volume resistivity of the final compound. During stabilization reaction, many by-products are formed which affect water absorption and dielectric pr…
28 2022-5
Nanocomposites as a flame retardant Nanocomposites is a multiphase solid material where one of the phases has one, two or three dimensions of less than 100 nanometres, or structures having nanoscale repeat distances between the different phases that make up the material. Polymer layered-silicate nanocomposites (PLSNs) with silicate enhance mechanical properties, increase heat-distortion temperatures, improve therm…
28 2022-5
Nano materials as a flame retardant Inexpensive nanoclays form 'nano-network' which spread out and dispersed through the host material forming a sort of gauze. The breakdown of material and the release of gas phase combustible molecules are slowed down or even prevented. Nano materials can be used as:a) Nano polymer compositesb) Nanoparticles in traditional back-coatingsc) Deposition of nano coatings on the fabric…
28 2022-5
Intumescent FRs Intumescence is the result of a combination of charring and foaming at the surface of the burning polymer, which protects the underlying material from the action of the heat or flame. Intumescent FRs (IFRs) is often used for applications requiring high levels of flame retardancy. They are highly efficient and low toxic. They provide very robust fire safety and flame resistance p…
28 2022-5
Common faults and solutions of plastic pipe extrusion line-3 8. Uneven pipe wall thickness Adjust the wall thickness on the mold; adjust the nozzle angle in the vacuum setting machine and the spray box to make the pipe cool evenly; adjust the water output of the sizing sleeve to make it even; disassemble the mold, check whether the screws inside the mold are loose, and re-tighten; 9. The plasticizing temperature is too high
28 2022-5
Common faults and solutions of plastic pipe extrusion line-2 4. A jitter ring appears inside the pipe Adjust the water outlet of the sizing sleeve to make it even; adjust the vacuum degree of the second chamber so that the vacuum degree of the rear chamber is slightly higher than that of the front chamber; check whether the vacuum seal is too tight; check whether the tractor is shaking; check the main engine Whether the material is unifor…
28 2022-5
Common faults and solutions of plastic pipe extrusion line-1 During the production line of plastic pipes, due to various reasons such as the operator's unskilled craftsmanship and machine operation, the plastic pipes often appear rough on the outer surface, jitter rings appear inside, uneven wall thickness, and insufficient roundness. Therefore, it is necessary to adjust the process in time and eliminate the failure of the plastic pipe ex…
21 2022-5
Nitrogen FRs This class consists of pure melamine, melamine derivatives, i.e. salts with organic or inorganic acids such as boric acid, cyanuric acid, phosphoric acid or pyro/poly-phosphoric acid, and melamine homologues. Combinations of nitrogen-based flame retardants such as melamine polyphosphate and metal phosphinates also demonstrated flame retardancy of composites that has repercussion…