News_第30页_Novista Chemicals - The pioneer of Flame retardant

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…
23 2022-7
Flame retardant is indispensable In order to meet fire safety requirements and diminish fire hazards, different solutions have been developed. Various chemical and physical strategies have evolved to prevent polymers from burning or to lower the heat release amount. Recently, flame retardants (FRs) have been widely recognized as fire safety tools capable of lowering the number of fire injuries and death. The t…
16 2022-7
Effects of Flame Retardant and Glass Fiber on the Properties of PA66 Due to the needs of electronic product applications, PA66 must have certain flame retardancy and relative tracking index (CTI) properties. Also, depending on product strength requirements, it may be necessary to add glass fibers to the PA66 material. Commonly used flame retardants are nitrogen flame retardants, bromine flame retardants and red phosphorus. (1) Under normal circ…
16 2022-7
Common mistakes in the use of flame retardants Misunderstanding 1: The larger the amount of flame retardant, the better the flame retardant effect. The limiting oxygen index (LOI) and UL-94 test results show that the flame retardant performance of the material is related to the flame retardant dosage. With the increase of flame retardant content, the flame retardant effect first increases and then decreases. Too much flame r…
16 2022-7
Different Products Require Different Chemical Compounds Not all flame retardants are the same. Plastics and other materials where flame retardants are used are widely different in their inherent properties and in roles they serve in their products. Similarly, flame retardants are a widely diverse set of chemicals that vary by functionality and application. They all help to inhibit or suppress fire ignition — no ignition, no fire. Sp…