News_第4页_Novista Chemicals - The pioneer of Flame retardant

29 2025-4
Brief introduction of PVC-DWV foam core pipes-2 According to the China national standard GB/T 16800-1997 "Unplasticized polyvinyl chloride (PVC-U) pipes with a cellular core for drainage", the inner and outer solid wall layers must have good mechanical properties, such as tensile strength of not less than 43MPa, and good processing performance. Generally, SG-4 and SG-5 PVC resins are selected.When producing PVC-U co…
29 2025-4
Brief introduction of PVC-DWV foam core pipes-1 PVC-DWV foam core pipes, in some places, are also called as PVC-U pipes with a cellular core for drainage.1. Introduction
29 2024-11
Influence of main indexes of chlorinated polyethylene (CPE) on modification of rigid PVC pr… Effect of CPE with different tensile strength and elongation at break on PVC modification:Tensile property is also the key performance index of CPE materials, and the tensile property of materials is characterized by tensile strength and elongation at break. The tensile properties of CPE are closely related to the raw material HDPE, chlorine content, chlorine atom distribution, …
29 2024-11
Influence of main indexes of chlorinated polyethylene (CPE) on modification of rigid PVC pr… Effect of CPE with different impurity particle number on PVC modification:Impurities in CPE usually refer to particles in CPE that are not plasticized or difficult to plasticize, such as hyperchlorinated CPE, yellow discolored particles, mixed with other material impurities, etc., which can usually be found by CPE spot pressure film test. This impurity particles exist in every m…
28 2024-11
What is ASA (Acrylonitrile styrene acrylate)? Acrylonitrile styrene acrylate (ASA), also called acrylic styrene acrylonitrile, is an amorphous thermoplastic developed as an alternative to acrylonitrile butadiene styrene (ABS), that has improved weather resistance.It is an acrylate rubber-modified styrene acrylonitrile copolymer, and can be used for general prototyping in 3D printing, where its UV resistance and mechanical p…
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…