No absolutely not fade product, use colored masterbatch products may still be fading, but for the extent of different grades of products is different, some obvious, some are difficult to detect.

A variety of factors will fade occurs by plastic coloring products. Coloring plastics products fade with pigments, dyes, light resistance, oxidation resistance, heat resistance, acid and alkali resistance as well as characteristics of the resin used. After the selection should be based on processing conditions and the requirements of plastic products, in the production of the master batch of the desired pigment, a dye, a surfactant, said dispersing agent performance, carrier resin and aging aid comprehensive assessment.

Because of the pigment masterbatches first pretreated with high tinting strength, dosage can be reduced and stable quality, transportation, storage, easy to use, environmental pollution is greatly reduced.

By the dispersant pigment wetting, penetration of the surface to exclude air, the aggregates, aggregates dispersed into fine, stable and homogeneous granules, and in the process is no longer aggregated, dispersants commonly used low molecular weight polyethylene wax, for difficult to disperse organic pigments and carbon black with EVA wax or oxidized polyethylene wax, synthetic low molecular weight polyethylene wax and polyethylene of low molecular weight polyethylene wax cracking the legal system are very different.

Other additives have coupling agents, antioxidants, light stabilizers, antistatic agents, fillers, etc., depending on the requirements and the species may be added to the amount, called multi-functional masterbatches, Again join brightener conducive moldings stripping and improve product surface brightness.

Performance indicators masterbatch color, whiteness, yellowness, yellowing, thermal stability, oxygen index, the melt flow rate, etc., of course, the fineness of pigment migration resistance, chemical resistance, toxicity and masterbatch grain performance related, some indicators are important for specific purposes, such as pressure filtration values of fiber grade masterbatch (DF value) fineness.

1. lightfastness

Lightfastness colorants directly affect product fade by glare of outdoor products, colorants used light (Light) level requirements is an important indicator, light level difference, the product in use will soon fade. Weathering products selected light level should not be less than six, the best selection of seven, eight, indoor products optional four, five. Light performance carrier resin has a greater impact on the change in color after UV irradiation caused the resin molecular structure changes its faded. In the master batch was added a light stabilizer and an ultraviolet absorber, a colorant can improve light fastness and coloring plastics.

2. Heat resistance

Thermal stability of the pigment refers to a pigment TGA processing temperatures, discoloration, the degree of fading. Composition of inorganic pigments are metal oxides, salts, good thermal stability, high heat resistance. The organic pigment is at a temperature change of molecular structure and a small amount of decomposition occur. In particular PP, PA, PET products, processed at temperatures above 280 ℃, the toner on the one hand in the election to focus the heat resistance of the pigment, on the one hand to consider the pigment heat time, usually requiring heat time 4-10rain ⋯.

Pigment in the resin of certain metal ions will promote thermal decomposition, wherein, copper, manganese, iron, cobalt or the like aging effect pigments polyolefin promoting strong, while smaller potassium, sodium, cadmium, calcium pigments affect . The same kind of metal element by a pure metal, metal oxide, metal salt enhanced sequence.

3. antioxidant

Some organic pigments in the oxidation degradation of macromolecules or other changes occur gradually fade, this process one of the high-temperature oxidation process, the second is the case of oxidation of strong oxidants (such as the chrome yellow chromate) occurred. Lakes, after mixing with chrome yellow azo pigments used red will gradually subside.

4. acid and alkali resistance

Colored plastics and colorants fade resistance to chemicals (acid and alkali resistance, oxidation and reduction) related. Such as chromium molybdenum red resistant to acid, alkali but sensitive, not acid cadmium yellow, these two kinds of pigments and phenolic resin from certain colorants strong reduction, seriously affecting the heat resistance of the coloring agent, weatherability and discoloring.

Hangzhou Yujie Chemical Co., Ltd. Main masterbatches, pre disperse dyes, masterbatches and other products, such as our products are interested, please call our hotline: 86-571-85095115!