The quality of masterbatch determines the quality of plastic packaging materials, and EPP masterbatch is a popular choice for plastic packaging raw materials in recent years. EPP masterbatch, after secondary foaming, has outstanding lightweight, impact resistance, continuous compression resistance, and environmental performance. It is widely used in packaging molded parts in various industries due to its excellent insulation, energy absorption, sound barrier, and anti permeability properties, as well as chemical stability. The good appearance and high strength of EPP materials have gradually made them a popular packaging substrate in industries such as food, electronics, and auto parts.
　　1、 Color masterbatch containing coloring agents
　　Masterbatch is the most widely used coloring method in plastic coloring. Different coloring agents endow plastic products with different color properties. Characteristics such as hue, coloring power, coverage, transparency, color fastness (such as sun resistance, weather resistance, solvent resistance, migration resistance, heat resistance), etc.
　　For plastic packaging materials, the purpose of coloring is not only to meet the requirements of ordinary color identification, but also to attract consumers' attention to the novelty of packaging and stimulate their purchasing ideas, thereby promoting product sales. Plastic color masterbatch will be matched with some common colors according to the packaging material manufacturer for selection, and special colors need to be customized to flexibly meet the color requirements of the molding manufacturer.
　　In addition to traditional black, white, gray, versatile gold colors and ordinary red, orange, yellow, green, blue, blue, purple, brown color series colors, various special effects colors can also be used, such as jewelry luster effect, spot effect, different angle color change effect, metallic texture effect, whitening effect, temperature difference color change effect, fluorescent effect, light color change effect, marble pattern effect, flashing point, night light effect, imitation wood grain effect, etc., to enhance the personalized visual appearance of packaged products and improve the attractiveness of packaged products to customers.
　　2、 Functional masterbatch
　　Flame retardant, filler, antistatic agent, anti-aging additive epp master batch, etc
　　Functional masterbatch refers to masterbatch containing functional additives other than color. Each function depends on the active ingredients contained, and there are mainly three categories:
　　1. Processing and Forming Performance
　　Processing aid masterbatch that eliminates melt fracture and reduces die scaling; Cooling masterbatch for reducing the processing temperature during molding; Dry masterbatch that absorbs moisture from raw materials; Smooth masterbatch for easy demolding of injection molded parts; Anti slip masterbatch to prevent slipping during film winding; Anti adhesion masterbatch to prevent adhesion between films during unwinding; Save materials such as cleaning masterbatch for color changing and cleaning machines; By using such functional masterbatch, the molding quality is good, the molding processing operation is convenient, the production efficiency is improved, and energy consumption is reduced.
　　2. Forming physical and chemical properties
　　If improving thermal aging, antioxidant masterbatch can inhibit the yellowing of finished products; Anti aging masterbatch for improving the weather resistance of finished products; Nucleation masterbatch or anti transparency masterbatch that enhances the rigidity or transparency of the product; Toughened masterbatch for improving the mechanical properties of molded parts; Smooth masterbatch that reduces the surface friction coefficient of molded parts; Open masterbatch that reduces the opening torque of bottle caps; Thermal conductive masterbatch for improving the thermal conductivity of plastic parts; Conductive EPP masterbatch that improves conductivity, filling masterbatch that improves the mechanical properties of plastics and reduces costs, etc.
　　3. Expand application functions
　　Anti static EPP masterbatch that reduces the surface resistance of molded parts; Flame retardant masterbatch for improving the fire resistance of materials; Enhance the antibacterial masterbatch of plastics to resist microbial invasion; Improve the barrier masterbatch of plastic packaging materials to prevent gas (such as oxygen, carbon dioxide, water vapor) from penetrating; Degradable masterbatch for reducing plastic pollution; Deodorizing masterbatch for removing odors; Flavor enhancing masterbatch for adding fragrance to plastics; Anti fog droplet masterbatch to reduce surface fog and vapor on food packaging film; Rust proof masterbatch to prevent electronic components from rusting; Laser masterbatch that provides laser coding effect; Matte masterbatch that provides matte or even frosted effects, foam masterbatch that provides weight reduction, insulation, sound insulation, and shock absorption effects, etc.
　　Generally, the masterbatch is single functional. Like color masterbatch, it only provides color function; Anti static masterbatch, only providing anti-static function; Multiple functions are superimposed. In order to color the plastic package and improve the application performance, such as anti-aging, colorants and anti-aging additives can also be combined in a master batch, that is, multi-functional master batch.