Company News_第12页_Novista Chemicals - The pioneer of Flame retardant

29 2022-7
Nanoclays flame retardant Nanoclays are ubiquitous nanofillers that are isolated from naturally occurring clays through energetic stirring, followed by centrifugation and freeze-drying, centrifugation and cross-flow filtration, or ultracentrifugation. Nanoclays are composed of stacked mineral silicates layers, forming complex clay crystallites. Three main mechanisms have been reported for fire retardancy…
29 2022-7
Zinc oxide flame retardant Zinc oxide (ZnO) is one of the most popular photocatalyst metallic compounds because of its advantages, such as, cost efficiency, numerous active sites, high surface reactivity, and low environmental impacts. In fact, it is listed as safe by the US Food and Drug Administration given that zinc is an essential trace element. ZnO particles have high thermal conductivity as well as…
29 2022-7
Nanosized fire retardants With the advent of nanotechnology in the past few decades, the prospects of nano scale fillers in polymer-based composites in the flame retardancy applications have progressed rapidly. Although nanofillers do not show excellent fire retardance inherently, incorporation of low amount of them in polymer composites tend to provide drastic improvement in thermal stability, smoke r…
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…
9 2022-7
Fire Retardant Building Materials Among the many products used to build a home or office, one of the most critical uses of flame retardants in the building environment is insulation. Insulation is widely used in modern buildings to improve energy efficiency. It is thin, light, and has many technical properties that appeal to architects and builders. It is a lightweight, versatile and easy to use material that ar…