News_Novista Chemicals - The pioneer of Flame retardant

16 2025-12
The Influence of PVC Additives on the Plasticization Process I. Concept of PVC PlasticizationPolyvinyl Chloride (PVC) resin is a thermoplastic amorphous polymer material that undergoes a transition from the glassy state → highly elastic state → viscous flow state under the combined action of temperature and shear force. From a rheological perspective, the plasticization of PVC precisely refers to this state transition process.
4 2025-12
Discussion on PVC Processing and Gelation (Plasticization) Impact of Gelation Degree on Product PerformanceThe performance of PVC products is closely related to the degree of gelation during processing. Insufficient gelation results in brittle products with inadequate mechanical properties, while excessive gelation may cause yellow lines and also lead to poor mechanical performance. Therefore, gelation degree is one of the most critical…
1 2025-12
Formula and Process Design for High-Rigidity, Low-Density PVC Wood-Plastic Foam Boards Polyvinyl Chloride (PVC)-based foam boards were initially used primarily in fields such as advertising cabinets and bathroom vanities.However, traditional PVC foam boards suffer from two major drawbacks: high density, which leads to excessive weight, and insufficient rigidity (low flexural modulus) coupled with a low heat deflection temperature (HDT). These limitations prevent t…
14 2025-10
Why Too Much Ca-Zn Stabilizer Can Cause PVC “Burning” Instead of Protection In PVC processing, it is often assumed that more stabilizer means better stability. However, overdosing Ca-Zn stabilizer can actually trigger thermal degradation and blackening, also known as “zinc burn.”There are four key mechanisms behind this phenomenon:
26 2025-9
How will internal and external lubricants determine product quality in PVC-U processing? Have you ever encountered problems such as rough surfaces of PVC pipes, frequent jamming during extrusion? or oil spots on food-grade PVC packaging films and substandard mechanical properties? 80% of these seemingly unsolvable production problems are rooted in the balance of the lubrication system. I. Core Functions of Internal Lubricants
8 2025-9
Classification, Mechanisms, and Applications of ACR Processing Aids In PVC processing, ACR (acrylic processing aids) are multifunctional additives that improve melt rheology, promote fusion/plasticization, and enhance melt strength.This article summarizes their classification, mechanisms of action, applications, and representative case studies.
12 2025-8
Mastering PVC Performance: How ACR, Plasticizers, and Internal Lubricants Work Together PVC Products Everywhere – And the Hidden Helpers Behind ThemFrom rigid water pipes to flexible raincoats, from smooth decorative panels to tough flooring, PVC is all around us. Despite looking and performing so differently, these products share one secret: a handful of special additives working quietly in the background.
28 2025-7
Introduction to PVC Mixing Technology In the processing of PVC (polyvinyl chloride), mixing technology is the first crucial step in the production of PVC products and plays a vital role. However, many companies often overlook this step, and workers tend to misunderstand the mixing process, thinking that mixing is simply stirring all components of the formulation evenly. In fact, mixing technology is far more complex…