News_第3页_Novista Chemicals - The pioneer of Flame retardant

25 2022-7
WHAT IS EXTRUSION? - 1 Do you remember as a kid shoving play dough into the red and yellow toy to squeeze out a “rope” shaped like a star or a flower? Well, that defines Extrusion: a process used to create objects of a fixed cross-sectional profile. Commonly extruded materials include metals, polymers, ceramics, concrete, modeling clay, and foods, such as macaroni and cheese puffs. Here we will focu…
25 2022-7
How to solve the problem of bending deformation in the extrusion of u-PVC profile? How to solve the problem of bending deformation in the extrusion of u-PVC profile?Bending deformation of PVC profiles is a common problem in the extrusion process, and its causes are mainly: uneven discharge of material from the mouth die; inadequate cooling of materials and inconsistent post-shrinkage when cooling and shaping; equipment and other factors.
25 2022-7
Profile Extrusion - 2 Profile ExtrusionTypical Raw Materials For Plastic Profiles: - HDPE (High Density Polyethylene) - LDPE (Low Density Polyethylene) - LLDPE (Linear Low Density Polyethylene) - PETG
25 2022-7
Profile Extrusion - 1 Profile extrusion is a process by which various plastic materials are used to develop quality plastic products. These products have a continuous cross-section such as pipe, drinking straws, decorative molding, eavestroughing, window trimming and many others. The basic procedure of profile extrusion is that the polymer is melted into a hollow mold cavity, under the influence of h…
25 2022-7
PVC and uPVC - What's the Difference? Polyvinyl chloride or PVC plastic is one of the most used plastics in the world. It is incredibly versatile and found in an endless array of products that impact our everyday lives, and is suitable for recycling. PVC is particularly used for building and construction but also plays an important role in health, transport, packaging as well as art and fashion.
25 2022-7
Plastic Extrusions: What Are They? Plastic extrusions, sometimes referred to as plastic profiles or sections, are used widely and across a range of sectors including construction, manufacturing, transport, retail and events. However little is known about what a plastic extrusion actually is or how it's made.In broad terms, extrusion implies a pushing out action. In this context it refers to the process of that is…
23 2022-7
Flammability characterization methods Flame retardancy process can be characterized either in gas phase, by investigating present pyrolysis species, or in solid phase, by studying the morphology and composition of the char layer. There are numerous macro and micro fire characterization methods. Limiting oxygen index (LOI), UL-94, cone calorimetry, microscale calorimetry, and thermogravimetric analysis (TGA) are of t…
23 2022-7
Flame retardancy mechanisms According to their specific mechanisms, fire retardants interrupt polymer pyrolysis in one or more steps. Three of the most common flame retardancy mechanisms are described in previous studies. Gas phase inhibition mechanism, where the FRs react with the polymer under combustion in the gas phase with hydroxyl or oxygen agents at the molecular level and extinguish the combustio…