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Q什么是塑料包装材料的透明性?如何检测?塑料包装材料的透明性是指其能够透过可见光并发生少量散射的性质。对透明性的测定主要是测定塑料包装材料的透光率和雾度。透过塑料包装材料的光通量与入射光通量之比(以百分数表示)称透光率,其表征可见性;透过塑料包装材料而偏离入射光方向的散射光通量与透过塑料包装材料的光通量之比(以百分数表示)称为雾度,其表征清晰度。
Q What is the transparency of plastic packaging materials? How to detect? The transparency of plastic packaging materials refers to its ability to transmit visible light with a small amount of scattering properties. The determination of transparency is mainly the determination of plastic packaging materials, light transmittance and haze. The ratio of luminous flux to incident luminous flux through the plastic wrap, expressed as a percentage, is referred to as the light transmittance, which characterizes the visibility; the ratio of the amount of scattered light flux deviating from the incident light through the plastic wrap to the amount of light transmitted through the plastic wrap (Expressed as a percentage) is called haze, which characterizes the sharpness.