Iron oxide red and other colorants to give the charm of plastic packaging
We are using anytime, anywhere in the use of plastic bags, shopping supermarkets, shopping, packaging, garbage, etc., practical, is indispensable to human life, bright colors of plastic is the impact of people's vision. In order to make plastic packaging products rich in color, in the production of plastic packaging to use colorants.
Colorants are mainly pigment and dye. Pigment is a very fine granular colored pigments, insoluble in water and resin colorants, so to obtain the desired coloring properties, the need for mechanical methods to disperse the pigment evenly in the resin or oil, plastic products can be obtained by the color The According to the structure can be divided into organic pigments and inorganic pigments. Inorganic pigments (such as iron oxide pigments) thermal stability, light stability, low price, but the color strength is relatively poor, relative density; organic pigments high color, bright color, complete chromatography, the relative density is small, the shortcomings of heat Sex, weatherability and hiding power as inorganic pigments. Dyes are organic compounds that are soluble in water and most solvents and stained plastics. It can be stained inside and outside the stained goods. Advantages of small density, high color strength, good transparency, but its general molecular structure is small, easy to migrate when colored.