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Material Types and Specification System
| Type | Thickness Range (μm) | Width Range (mm) | Substrate Type | Coloring Process | Main Characteristics |
| PET Color Film | 12-250 | 500-2000 | PET Polyester | Mass Coloring / Coating | High Transparency, High Gloss, High Strength |
| PVC Color Film | 50-500 | 1000-3000 | PVC Polyvinyl Chloride | Calender Coloring | Soft, Easy Forming, Low Cost |
| BOPP Color Film | 15-100 | 800-2500 | BOPP Biaxially Oriented Polypropylene | Online Coating | High Gloss, Low Haze, Moisture Resistant |
| CPP Color Film | 25-150 | 800-2000 | CPP Cast Polypropylene | Co-extrusion Coloring | Good Heat Sealability, Soft, Transparent |
| Metallized Color Film | 12-50 | 800-2000 | Various Substrates | Metallization + Coloring | Metallic Luster, Good Barrier Properties |
| Matte Color Film | 25-250 | 800-2000 | Various Substrates | Matte Coating | Matte Effect, Anti-glare |
| Pearlescent Color Film | 30-300 | 800-2000 | PP/PE Substrate | Pearlescent Pigments | Pearl Luster, High Decorative Appeal |
Technical Parameters and Performance Indicators
| Performance Indicator | PET Color Film | PVC Color Film | BOPP Color Film | Test Standard |
| Thickness (μm) | 12-250 | 50-500 | 15-100 | GB/T 6672 |
| Tensile Strength MD/TD (MPa) | 150-220 / 160-240 | 40-60 / 40-60 | 120-180 / 200-280 | GB/T 1040.3 |
| Elongation at Break MD/TD (%) | 80-150 / 60-120 | 150-300 / 150-300 | 80-120 / 40-80 | GB/T 1040.3 |
| Tear Strength MD/TD (N/mm) | 100-180 / 120-200 | 40-80 / 40-80 | 60-120 / 80-150 | GB/T 16578.1 |
| Coefficient of Friction (Static/Kinetic) | 0.35-0.55 | 0.25-0.45 | 0.25-0.45 | GB/T 10006 |
| Surface Tension (dyne/cm) | ≥38 | 32-38 | ≥38 | GB/T 14216 |
Optical and Color Properties
| Performance Indicator | High Transparency Film | Matte Film | Metallic Film | Test Standard |
| Light Transmittance (%) | ≥85 | 10-50 | ≤5 | GB/T 2410 |
| Haze (%) | ≤2.0 | 15-40 | - | GB/T 2410 |
| Gloss (60°) | ≥90 | 10-30 | ≥80 | GB/T 8807 |
| Color Difference ΔE | ≤1.5 | ≤2.0 | ≤2.0 | GB/T 7921 |
| Lightfastness (Grade) | ≥7 | ≥6 | ≥6 | GB/T 8427 |
Barrier Properties
| Performance Indicator | PET Color Film | Metallized Color Film | High Barrier Color Film | Test Standard |
| Water Vapor Transmission Rate (g/m²·24h) | 20-40 | 0.5-1.5 | 0.5-2.0 | GB/T 26253 |
| Oxygen Transmission Rate (cm³/m²·24h·0.1MPa) | 80-120 | 1.0-5.0 | 0.5-3.0 | GB/T 19789 |
| Light Transmittance (%) | Varies by Type | ≤5 | Varies by Type | GB/T 2410 |
Typical Application Fields
| Application Field | Specific Uses | Recommended Type / Thickness | Key Requirements |
| Food Packaging | Snack Packaging, Candy Wraps, Coffee Packaging | BOPP/PET Color Film 15-30μm | Complies with Food Safety Standards, Good Heat Sealability |
| Consumer Goods Packaging | Shampoo Labels, Cosmetic Packaging, Detergent Packaging | PET/PVC Color Film 25-50μm | Good Print Quality, Chemical Resistance |
| Electronics | Phone Films, Screen Protectors, Insulating Films | PET Color Film 25-100μm | High Transparency, Low Static, Scratch Resistant |
| Building & Decoration | Furniture Laminates, Wall Decoration, Advertising Light Boxes | PVC Color Film 80-300μm | Good Weather Resistance, Easy Application, Rich Patterns |
| Books & Stationery | Book Covers, Folders, Photo Album Covers | BOPP/PET Color Film 25-75μm | Good Stiffness, Vibrant Colors, Wear Resistant |
| Industrial Applications | Labels & Tags, Instrument Panels, Protective Films | PET Color Film 50-250μm | Heat Resistant, Solvent Resistant, Dimensionally Stable |
| Medical Supplies | Device Packaging, Medical Labels, Protective Equipment | PET/CPP Color Film 25-100μm | Biocompatible, Sterilizable, High Transparency |
Color Stability Reference Table
| Environmental Factor | Test Conditions | PET Color Film | PVC Color Film | BOPP Color Film |
| Ultraviolet Light | 500h QUV Test | ΔE ≤ 1.5 | ΔE ≤ 2.5 | ΔE ≤ 2.5 |
| High Temperature | 80℃ × 168h | ΔE ≤ 1.0 | ΔE ≤ 2.0 | ΔE ≤ 1.5 |
| Damp Heat | 85% RH, 85℃ × 168h | ΔE ≤ 1.2 | ΔE ≤ 2.5 | ΔE ≤ 2.0 |
| Chemicals | 100x Alcohol Wipes | No Change | Slight Change | No Change |
| Abrasion | 500x Rub Test | No Shedding | Slight Wear | No Shedding |
Processing and Printing Guidelines
1. Slitting and Rewinding
Slitting Equipment: Dual-shaft Slitter, Single-shaft Slitter
Slitting Speed: 100-500 m/min, adjusted according to material thickness.
Tension Control: 2-15 N/mm², to avoid stretching and deformation.
Rewind Hardness: 45-55 Shore D, ensuring neat winding.
2. Printing Processes
| Printing Method | Suitable Film Types | Ink Type | Drying Method | Printing Precision |
| Gravure Printing | All Color Films | Solvent-based / Water-based Ink | Hot Air Drying | ≤0.1mm |
| Flexographic Printing | Soft Color Films | Water-based / UV Ink | UV Curing / Hot Air | ≤0.15mm |
| Screen Printing | Thick Color Films | Solvent-based / UV Ink | Air / UV Curing | ≤0.2mm |
| Digital Printing | Small Batch Customization | Water-based / UV Ink | UV Curing | ≤0.05mm |
3. Lamination Processing
Dry Lamination: Uses polyurethane adhesives, suitable for various color films.
Solvent-free Lamination: Environmentally friendly process, suitable for food packaging films.
Extrusion Lamination: Achieved through a PE/PP extrusion layer.
Hot-melt Lamination: Suitable for laminating temperature-sensitive materials.
Selection Decision Matrix
| Application Scenario | Primary Performance Requirement | Recommended Film Type | Thickness Suggestion | Processing Key Points |
| Outdoor Advertising | Weather Resistance, UV Resistance | PET/PVC Color Film | 75-150μm | UV-resistant surface treatment, outdoor-grade inks. |
| Food Packaging | Safety, Heat Sealability | BOPP/CPP Color Film | 15-30μm | Food-grade inks, heat-seal layer design. |
| Electronics | Dimensional Stability, Cleanliness | PET Color Film | 50-100μm | Cleanroom processing, anti-static treatment. |
| Premium Labels | Print Quality, Stiffness | PET/BOPP Color Film | 25-50μm | Surface corona treatment, fine printing. |
| Protective Films | Easy Release, No Residue | PET Color Film | 50-125μm | Release force control, adhesive selection. |
| Decorative Materials | Texture/Feel, Durability | PVC/Metallic Film | 100-300μm | Embossing treatment, scratch-resistant coating. |
Industry Customized Solutions
1. Food Packaging Industry
Requirements: High barrier, grease resistance, easy opening.
Solution: Multi-layer co-extruded color film with built-in barrier layers.
Applications: Stand-up pouches, retort packaging, frozen food packaging.
2. Electronics Industry
Requirements: Low dielectric constant, heat resistance, anti-static.
Solution: Functional coated color film with added anti-static agents.
Applications: Flexible circuit substrates, touch screen protectors, insulating materials.
3. Automotive Interior Industry
Requirements: Scratch resistance, aging resistance, premium feel.
Solution: Surface-hardened color film with embossed textures.
Applications: Dashboard decoration, door panel covering, control panels.
4. Medical Packaging Industry
Requirements: Sterilizability, high transparency, non-migratory.
Solution: Medical-grade color film, certified to ISO 10993.
Applications: Device packaging, pharmaceutical packaging, diagnostic reagent packaging.
Storage and Maintenance
Storage Conditions
Environment: Constant temperature and humidity, 15-25°C, 40-60% RH.
Light: Store away from light to prevent UV exposure.
Stacking: Store vertically or flat on pallets, avoid heavy pressure.
Shelf Life: Best used within 6-12 months of production.
Usage Precautions
Conditioning: Allow 24 hours for temperature and humidity balance with environment before use.
Static Control: Control static electricity in processing environment to avoid dust attraction.
Tension Control: Precise tension control during processing to prevent stretching/deformation.
Cleaning: Regularly clean guide rollers to avoid impurities damaging film surface.
Development Trends
Technical Development Directions
1. Eco-friendly Color Films: Water-based inks, solvent-free lamination, biodegradable substrates.
2. Enhanced Functionality: Self-healing coatings, thermochromic/photochromic colors, antibacterial surfaces.
3. Intelligent Production: Online color inspection, intelligent color matching systems.
4. Thinner Gauges: Achieving 20-30% reduction in thickness while maintaining performance.
Market Application Expansion
1. New Energy Sector: Lithium battery packaging film, PV module encapsulation film.
2. Smart Packaging: RFID-integrated color film, smart label film.
3. Flexible Displays: OLED substrate color film, flexible touch film.
4. Green Building: Energy-saving window film, decorative architectural film.
As an important functional film material, color film plays a significant role in multiple fields such as packaging and printing, decorative building materials, electronics, and food & medical industries, thanks to its rich color options, excellent processing performance, and wide application adaptability. With increasing environmental requirements and diversification of end-use applications, color film is developing towards more environmentally friendly, smarter, and more functional directions. Correct material selection, precise processing control, and proper storage and use are key to ensuring the full performance of color film. In the future, color film will demonstrate its unique value and charm in more emerging fields.
