The haze of plastic refers to the ratio of the scattered light flux and transmitted light flux that deviates from the incident light through the sample, expressed in percentage. Fog is due to material surface defects, density changes or light scattering impurities caused by the material interior or surface due to light scattering caused by cloudy or cloudy appearance, so fog is also known as turbidity. It is used to measure the opacity of transparent or translucent materials. The absorption and scattering of light by plastic are related to the structure, surface features and other substances contained in the material itself. Measurement of light transmittance and fog of transparent or translucent plastics can be used to control the quality of products and study some optical properties of products. Generally speaking, the material with high light transmittance has low fog value; On the contrary, the material with low light transmittance has high fog value, but it is not completely so. Some material transmittance is high, fog value is very large, such as ground glass, so transmittance and fog value are two independent indicators. In industry, the integral foggmeter or integral photometer is used to measure the foggness of plastics. The principle is to calculate the total transmittance Tt, slow transmittance Td and fog (Td/Tt) of the sample through the total transmittance of the sample, the light scattering amount caused by the instrument and the light scattering amount caused by the instrument and the sample.
Haze meter adopts parallel lighting, hemispherical scattering, integral ball photoelectric receiving mode, automatic operation system and data processing system by computer, no button operation, easy to use, and have standard printing, automatic display light transmittance/fog degree many times the average of the measurement, the light transmittance results show to 0.1%, the fog degree shows to 0.01%, no zero drift, Confidence is strong, specific structure an open window sample almost not limited by sample size, measurement speed is fast, because of products, equipment is not affected by the ambient light, dark room, needn’t to be adopted to ensure the safety of large sample operators, realized the electronic circuit, high precision, equipped with standardized data print output interface, program-controlled printer haze meter can form a complete set of supply. It is equipped with thin film magnetic fixture and liquid sample cup, which brings great convenience to users.
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Post time: Jan-20-2022