News_Novista Chemicals - The pioneer of Flame retardant

15 2024-11
THE K VALUE OF PVC RESIN-1 What is K-Value?K- Value of S-PVC is a measure of its average degree of polymerization (PD), or average value of “n” in [CH2 – CHCl]n or average Mole. Wt.Tolerance limit of K value of commercially available S-PVC is usually +/-1. (K-50 – K-80)
15 2024-11
THE K VALUE OF PVC RESIN-2 Characteristics of different K values:• K70-75 are high K value resins which gives best mechanical properties but are more difficult to process. They need more plasticizer for same softness. High performance Cable insulations in Suspension resin and tough coatings for Conveyor belts, Industrial Flooring and similar high-end applications in Paste grade are some popular applicati…
12 2024-10
Influence of main indexes of chlorinated polyethylene (CPE) on modification of rigid PVC(6)… Effect of CPE with different ash mass fraction (ash) on PVC modification:In order to prevent CPE from caking, the line label stipulates that no more than 5% calcium powder can be added to CPE as a spacer. The regular manufacturers use mostly ultra-fine light calcium carbonate, which has high fineness, good dispersion effect, and can effectively and evenly cover the surface of CP…
29 2024-9
Influence of main indexes of chlorinated polyethylene (CPE) on modification of rigid PVC(5)… Effect of CPE with different particle size (screen residue) on PVC modification:Chlorination process, grinding and so on have a great relationship, CPE too thick or too fine have a certain impact on PVC modification effect. The suspension chlorination of CPE is a heterogeneous reaction, and the particle size of PE has a significant effect on the uniformity of chlorination. If th…
29 2024-9
Influence of main indexes of chlorinated polyethylene (CPE) on modification of rigid PVC(4)… Effect of CPE with different chlorine content on PVC modification:The compatibility of CPE with PVC depends on the chlorine content of CPE and the distribution of chlorine atoms on the PE molecular chain. The amount of chlorine in CPE has a great influence on the modification effect of PVC. After chlorination of the same polyethylene raw material, different chlorine content has …
21 2024-9
Influence of main indexes of chlorinated polyethylene (CPE) on modification of rigid PVC(3)… Effect of CPE with different Mooney viscosity on PVC modification:Although the CPE industry standard, Mooney viscosity has no requirements for plastic modification materials, but the Mooney viscosity of CPE can reflect the molecular mass of CPE, CPE molecular mass has a significant impact on its physical properties, such as material fluidity, aging resistance, strength and so on…
18 2024-9
Influence of main indexes of chlorinated polyethylene (CPE) on modification of rigid PVC(2)… Effect of different volatile CPE on PVC modification:CPE manufacturers generally use aqueous phase (acid phase) suspension chlorination process, in the chlorination reaction process, some hydrogen atoms in polyethylene molecules are replaced by chlorine atoms, resulting in chlorinated polyethylene and hydrogen chloride. Since the production of CPE is carried out in suspension an…
7 2024-9
AP766 flame retardant ProFlame® PNPO-766 (AP766) PNPO-766 is a kind of Halogen-Free flame retardant , which develops its effectiveness through phosphorus/nitrogen synergism.When the polyolefine on exposure to flame, the carbon foam layer formed protects the polymer through its heat insulating effect to reduce further oxygen access and prevent dripping of the polymer. At the sam…