What are the differences in dyes and pigments for fluorescent pigments?
Fluorescent pigments are classified as inorganic fluorescent pigments (such as fluorescent pigments for fluorescent and anti-counterfeiting fluorescent oils) and organic fluorescent pigments (also known as daylight fluorescent pigments): Only substances with specific chemical structures will have fluorescent properties. And these fluorescent colorant itself is often in the light, solvent resistance and other properties with inherent deficiencies. One way to overcome these congenital deficiencies is to fuse them into the framework of the polymer material by chemical or physical means and further process them into pigments. The polymer material used for this purpose serves both as a solvent for the fluorescent colorant and also for the fluorescent colorant, thereby imparting better resistance to light and solvent resistance to the fluorescent colorant.
The temperature of the thermoplastic resin from the solid state to the adhesive state is called the softening point. Softening point is too low, the product easy to agglomerate; softening point is too high, injection temperature will improve, otherwise the pigment is difficult to melt, scattered not open.
Dyes are divided into the following categories according to their application properties: 1. Direct dyes 2. Acid dyes 3. Disperse dyes 4. Reactive dyes 5. Reducing dyes 6. Cationic dyes 7. Scouring dyes 8. Condensed dyes In addition, oxidizing dyes, Dyes and so on.
Pigments are mainly used in the presence of inorganic compounds. Colors are a kind of colored material that can be attached to various fibers and other materials directly or by the action of the mordant. Can be combined with the dye compounds, mostly organic compounds. Pigment and dyestuffs Pigments are a kind of fine powdery colored material, generally insoluble in water, oil and solvent, but can be evenly dispersed in it. Pigment is the secondary film forming material of paint, in the wood decoration process modulation primer, putty and wood coloring, but also often use the pigment.
The average particle size is an important indicator of the size of the fluorescent pigment particles in units of um. The finer the particle size, the easier it is to disperse, melt and downstream the product.
