What are the basic requirements for pigments and dyes used in masterbatch biodegradable materials?

What are the basic requirements for pigments and dyes used in masterbatch biodegradable materials? Plastic coloring is a systematic project. The application objects, application formulas, application processes, and application sites of plastic coloring all put forward various requirements for masterbatches and the pigments and dyes used.
Application objects: Thermosetting plastics include phenolic resins, unsaturated polyester resins, polyurethanes, and epoxy resins. Thermoplastic plastics include polyvinyl chloride, polyethylene, polypropylene, ABS, polystyrene, polyester, polycarbonate, nylon, and polyoxymethylene.
The application formula contains: colorants, resins, stabilizers, dispersants, processing aids, fillers, functional additives (flame retardants, antistatic agents, biodegradable agents, modifiers, antioxidants, antioxidants).
Application processes include: extrusion molding (blowing film, extruding tubes, cables, spinning, extrusion, blow molding, laminating, sheets, blister molding), injection molding, calendering, compression molding, and molding.
Application sites: indoor, outdoor, food contact materials, toys, home appliances, wires and cables, packaging containers, chemical fiber clothing, instrumentation and electrical appliances.
In this system, it is far from enough for the colorant to only give the plastic various colors. It must be able to withstand various process conditions in the plastic processing and molding process, and have good application performance under the conditions of use. Based on the above requirements, the basic properties that plastic colorants should have are: color performance; heat resistance; light resistance and weather resistance; dispersibility; migration resistance; shrinkage and warping; acid resistance, alkali resistance, solvent resistance, chemical resistance; safety.

As we all know, the various properties of the pigments used in plastic masterbatches are closely related to their chemical structure, as well as their crystal form, particle size, particle distribution, use concentration, use conditions, plastic type and plastic additives, so plastic coloring is indeed a systematic project.
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