All You Need to Know About Black Masterbatch

1. Overview of Black Masterbatch

• Definition
  • Concentrated pelletized coloring additive for plastic products
  • Composition: carrier resin + carbon black pigment + dispersant + functional additives
• Core Advantages
  • Uniform black coloring & strong shading performance
  • Dust-free production, clean workshop environment
  • Stable physical properties of finished plastic parts
  • Easy storage, metering and processing

2. Core Raw Material Components

2.1 Carbon Black Pigment

• Classification by function
  • Pigment carbon black: ordinary coloring, low cost
  • Conductive carbon black: anti-static/conductive plastic parts
  • Weather-resistant carbon black: outdoor UV anti-aging products
• Key indicators: blackness, tinting strength, dispersibility, conductivity

2.2 Carrier Resin

• Matching principle: consistent with base plastic of final product
• Common types
  • PE carrier: film, blow molding, injection PE products
  • PP carrier: PP injection parts, non-woven fabrics
  • ABS/PS carrier: electronic plastic casings
  • EVA carrier: soft plastic, extrusion coating

2.3 Auxiliary Additives

• Dispersant: wax series, eliminate carbon black agglomeration
• Lubricant: improve fluidity, avoid machine screen blockage
• Antioxidant: prevent plastic aging during high-temperature processing
• Functional additives: anti-static agent, flame retardant, UV stabilizer

3. Main Types of Black Masterbatch

3.1 Ordinary Coloring Black Masterbatch

• Application: daily plastic products, packaging containers, plastic toys
• Feature: low carbon black content, only for shading and coloring

3.2 High Gloss Black Masterbatch

• Feature: fine carbon black, smooth product surface, high surface finish
• Application: home appliance shells, automotive interior plastic parts

3.3 Weather Resistant / UV Stabilized Black Masterbatch

• Feature: anti-ultraviolet, long-term outdoor non-fading
• Application: agricultural film, outdoor pipes, automotive exterior parts

3.4 Conductive / Anti-Static Black Masterbatch

• Feature: form conductive network, adjustable surface resistance
• Application: electronic IC trays, explosion-proof containers, new energy battery shells

3.5 Food Grade Black Masterbatch

• Feature: food-contact safe raw materials, non-toxic heavy metal free
• Application: food packaging, drinking water plastic pipe, food storage boxes

4. Production Manufacturing Process

1. Raw material weighing & mixing
   • Automatic batching according to formula ratio
   • High-speed mixer uniform pre-mixing
2. Twin-screw extrusion granulation
   • High-temperature melting and shear dispersion
   • Fully blend carbon black and carrier resin
3. Cooling & pelletizing
   • Water cooling strip drawing / underwater cutting
   • Uniform cylindrical black pellets
4. Screening & Inspection & Packaging
   • Remove broken material and coarse particles
   • Test color difference, dispersion, melt index before delivery

5. Application & Processing Guidelines

5.1 Matching Base Plastics

• PE/PP film, injection molding, blow molding
• ABS/PC/ABS electronic plastic parts
• PVC, EVA, PET, PS various plastic substrates

5.2 Recommended Addition Ratio

• General coloring: 2%–5%
• High shading requirement: 5%–8%
• Conductive anti-static grade: 10%–30%

5.3 Processing Equipment

• Injection molding machine
• Single/twin screw extruder
• Film blowing machine, pipe extruder
• Blow molding machine for hollow products

5.4 Common Defects & Solutions

• Surface speckles / agglomeration: insufficient mixing, poor dispersant
• Product insufficient blackness: low carbon black content, insufficient addition
• Brittle plastic parts: incompatible carrier resin
• Frequent screen blockage: excessive carbon black, lack of lubricant

6. Industry Application Fields

1. Packaging Industry
   • Plastic bags, blow molding bottles, packaging barrels, film
2. Electronic & Semiconductor
   • Anti-static trays, component packaging, conductive casings
3. Automotive Industry
   • Interior & exterior plastic parts, wire harness sheaths
4. Construction & Agriculture
   • Water supply pipes, agricultural mulch film, plastic profiles
5. Daily Consumer Goods
   • Plastic furniture, daily containers, plastic toys
6. New Energy Industry
   • Battery casings, charging pile plastic accessories

7. Selection Reference Standards

1. Clarify usage scenario: indoor / outdoor / conductive / food contact
2. Match carrier resin with finished base plastic
3. Confirm required performance: gloss, weather resistance, anti-static
4. Test sample first: check color difference, dispersion, mechanical impact
5. Compare cost performance: carbon black content, recommended addition proportion

8. Storage & Transportation Notes

• Sealed storage in dry, cool warehouse, avoid moisture absorption
• Stacking height limit to prevent bag breakage
• Keep away from strong oxidants and open fire
• Moisture-proof treatment required for long-term stock

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