Product Overview

DAMEI Indoor Epoxy-Polyester Hybrid Powder Coating is the most cost-effective solution for interior metal finishing applications where outdoor UV exposure is not a concern. This versatile formulation combines epoxy resin (typically 60-70%) with polyester resin (30-40%) to deliver an excellent balance of performance, appearance, and value.

Epoxy-polyester hybrid powder coating is the global standard for indoor metal products because it offers:

• Exceptional decorative properties - Smooth, uniform finish in any color or gloss level
• Superior mechanical properties - Excellent hardness, impact resistance, and flexibility
• Outstanding corrosion resistance - Protects metal substrates in indoor environments
• Excellent chemical resistance - Resists household cleaners, mild acids/alkalis, solvents
• Remarkable low-temperature flexibility - Bends to -8°C without cracking or delaminating
• Cost-effective performance - 20-30% lower cost than pure polyester with equal indoor performance
• Wide application versatility - Suitable for nearly all indoor metal finishing applications

The hybrid formula leverages the best properties of both resin types:
- Epoxy contribution: Excellent adhesion, corrosion resistance, chemical resistance, cost-effectiveness
- Polyester contribution: Enhanced weathering (limited outdoor use possible), improved flexibility, better appearance retention

DAMEI Indoor Epoxy-Polyester Powder Coating is the preferred choice for:
- Home appliances - Refrigerators, washing machines, ovens, air conditioners
- Metal furniture - Office furniture, home furniture, shelving systems
- Hardware & tools - Power tools, hand tools, toolboxes, hardware components
- Fitness equipment - Gym equipment frames, weight machines, exercise bikes
- Electrical enclosures - Control panels, switchgear, electrical cabinets
- General industrial - Any indoor metal product requiring durable, decorative finish

Applications: Appliances, office furniture, metal shelving, fitness equipment, power tools, hand tools, electrical cabinets, indoor architectural metalwork, decorative hardware.

Key Features & Benefits

✓ Excellent Decorative Properties

Superior Appearance Quality:

Epoxy-polyester hybrid powder coating delivers premium decorative finish for indoor products:

• Smooth Surface Finish:
• Glass-smooth flow and leveling
• Minimal orange peel texture
• Professional appearance comparable to automotive finishes
• Color Consistency:
• Batch-to-batch color variation: ΔE <0.5
• Critical for appliance manufacturers requiring exact brand color matching
• All RAL colors available plus unlimited custom color matching
• Gloss Range Flexibility:
• High gloss (80-95% @ 60°): Premium appliances, furniture
• Semi-gloss (40-60% @ 60°): General industrial, tools
• Matte (5-20% @ 60°): Contemporary furniture, architectural
• Excellent Color Retention (Indoor):
• No fading or yellowing for 10+ years indoors
• UV exposure limitation: Not recommended for continuous outdoor use (use pure polyester instead)
• Limited outdoor exposure acceptable: Occasional sun through windows, covered outdoor areas

Why It Matters:
Appliance and furniture manufacturers demand perfect appearance consistency. A refrigerator must match brand specifications exactly, and every unit must be identical. DAMEI's strict color control and smooth finish capability meet these demanding requirements.

✓ Outstanding Mechanical Properties

Hardness & Scratch Resistance:
- Pencil Hardness: >2H (GB/T 6739-1996)
- Resists scratching during assembly, shipping, and daily use
- Critical for appliances and furniture subject to contact and abrasion

Impact Resistance:
- Impact Resistance: 50 kg·cm (GB/T 1732-1993)
- Withstands accidental impacts (dropped tools, bumped furniture)
- No coating fracture or chipping under normal use

Remarkable Low-Temperature Flexibility:
- Flexibility: Passes -8°C bend test (GB/T 6742-1986)
- DAMEI's formulation maintains flexibility even when cold
- Critical for products assembled or used in cold environments
- No cracking at bends, edges, or formed sections even in winter conditions

Adhesion:
- Adhesion: Grade 0 (GB/T 9286-1998)
- Will not peel or delaminate from properly pretreated substrate
- Maintains adhesion through temperature cycling and humidity exposure

Why Low-Temperature Flexibility Matters:
Standard powder coatings become brittle when cold and crack during bending or forming. DAMEI's epoxy-polyester hybrid maintains flexibility to -8°C, allowing:
- Post-coating cold forming operations (bend, punch, assemble)
- Winter outdoor storage before installation
- Use in cold environments (refrigerated spaces, cold climates)
- No coating failure during shipping in unheated containers

✓ Excellent Corrosion Protection

Indoor Corrosion Resistance:

Epoxy resin provides outstanding corrosion protection for indoor metal products:

• Salt Spray Resistance: >1000 hours (GB/T 1771-1991)
• Humidity Resistance: 100% RH, 40°C, 1000+ hours - no blistering
• Cyclic Corrosion: Temperature and humidity cycling - excellent performance

Corrosion Protection Mechanism:
1. Barrier Protection: 60-80 μm coating film is impermeable to moisture and oxygen
2. Adhesion: Epoxy's excellent adhesion prevents underfilm corrosion
3. Chemical Resistance: Coating resists household and industrial chemicals that could initiate corrosion

Application Examples:
- Washing machines: Humid environment, detergent exposure - no rust for 10+ years
- Kitchen appliances: Moisture, heat, food acids - excellent corrosion protection
- Fitness equipment: Perspiration (salt + moisture) - coating prevents rust
- Electrical cabinets: Industrial environments, chemical exposure - long-term protection

✓ Superior Chemical Resistance

Epoxy-polyester hybrid coating resists a wide range of chemicals encountered in indoor use:

Household Chemicals:
- Detergents, soaps, cleaning products: Excellent resistance
- Bleach (dilute): Good resistance
- Window cleaners, disinfectants: Excellent resistance
- Food acids (vinegar, citrus): No effect on coating

Industrial Chemicals:
- Mild acids (pH 4-6): Good resistance
- Mild alkalis (pH 8-10): Good resistance
- Aliphatic solvents (mineral spirits): Excellent resistance
- Alcohols (isopropanol, ethanol): Excellent resistance

Aromatic Solvents (Limited Resistance):
- MEK, acetone, xylene: Limited exposure acceptable, extended contact may soften coating
- For severe chemical exposure: Specify high-crosslink formulation or two-coat system

Why It Matters:
Appliances are cleaned regularly with harsh chemicals. Furniture may contact solvents or cleaners. Tools are exposed to oils and solvents. Epoxy-polyester hybrid's excellent chemical resistance ensures the coating maintains appearance and protection despite these exposures.

✓ Cost-Effective Performance

Why Epoxy-Polyester Hybrid for Indoor Applications?

For indoor products, epoxy-polyester hybrid delivers optimal value:

Performance Comparison:

The Value Proposition:
- For indoor-only applications, epoxy-polyester provides the same excellent decorative and protective properties as pure polyester at lower cost
- Reserve pure polyester for outdoor applications where UV resistance is required
- For mixed indoor/outdoor applications: Use epoxy-polyester for indoor components, pure polyester for outdoor components

Volume Users (Appliances, Furniture):
Cost savings of 20-30% per kg translate to significant annual savings:
- Appliance manufacturer using 500 tons/year: Save $50,000-75,000 annually vs. pure polyester
- Furniture manufacturer using 200 tons/year: Save $20,000-30,000 annually
- Performance identical for indoor use - pure polyester offers no advantage indoors

✓ Fast Cure & High Productivity

Efficient Production Capability:

Epoxy-polyester hybrid cures rapidly for high-volume production:

Standard Cure:
- Temperature: 180-200°C (object temperature)
- Time: 10-15 minutes at temperature
- Result: Fully cured coating ready for assembly and packing

Low Temperature Cure:
- Temperature: 160°C
- Time: 20 minutes
- Application: Heat-sensitive assemblies (plastic inserts, rubber gaskets, pre-assembled components)

Cure Efficiency vs. Liquid Paint:
- Powder coating: 180-200°C × 10-15 minutes
- Liquid paint: Often requires 140-160°C × 20-30 minutes (longer due to solvent evaporation stage)
- Energy savings: 30-40% less energy per part (higher temp but much shorter time)

Productivity Advantages:
- Fast cure allows rapid line speed
- No flash-off time required (unlike liquid paint)
- No drying racks or extended cooling
- Immediate handling after cool-down (30-60 seconds)

✓ Environmentally Friendly

Zero VOC Emissions:
- No volatile organic compounds released during application or cure
- Powder coating contributes zero VOC to air quality calculations
- Complies with strictest global environmental regulations (EU, California, China)

High Material Efficiency:
- Transfer efficiency: 60-70% (electrostatic spray)
- With powder reclaim system: >95% material utilization
- Liquid paint waste: 40-60% typical (overspray cannot be reclaimed)

No Hazardous Waste:
- Unused powder: Return to box or reclaim system (100% recyclable)
- Contaminated powder: Dispose as non-hazardous industrial waste
- No liquid waste (powder coating is dry process)
- No solvent-contaminated rags, filters, or cleanup materials

Workplace Safety:
- No solvent odors or fumes
- Reduced PPE requirements vs. liquid paint
- Lower fire/explosion risk (no flammable solvents)
- Cleaner work environment (powder overspray easily cleaned vs. liquid paint mist)

Technical Specifications (Based on Product Catalog Data)

Application Areas

Home Appliances

Major Appliances (White Goods):
- Refrigerators (exterior panels, doors)
- Washing machines and dryers (cabinets, control panels)
- Dishwashers (door panels, control area)
- Ovens and ranges (exterior only - interior requires high-temp coating)
- Microwave ovens (exterior housing)
- Air conditioners (indoor and outdoor units - use pure polyester for outdoor)

Small Appliances:
- Coffee makers, toasters, blenders (metal housings)
- Food processors, mixers (metal bowls and bodies)
- Vacuum cleaners (metal components)
- Electric kettles (exterior surfaces)

Why Epoxy-Polyester for Appliances:
- Color consistency: Exact brand color match, every unit identical
- Smooth finish: Premium appearance for consumer products
- Chemical resistance: Resists cleaning products used on appliances daily
- Cost-effective: Lower coating cost for high-volume production
- Mechanical durability: Resists scratches, impacts during assembly, shipping, and use

Application Example:
Leading Chinese refrigerator manufacturer uses DAMEI epoxy-polyester for all exterior panels:
- Color: Custom white (exact brand match, ΔE <0.3 batch-to-batch)
- Gloss: 85% @ 60° (high-gloss premium appearance)
- Film build: 60-70 μm
- Annual volume: 800 tons (2 million refrigerators/year)
- Performance: 10+ years no coating degradation, excellent customer satisfaction

Metal Furniture

Office Furniture:
- Desks and workstations (steel frames, panels)
- Filing cabinets and storage systems
- Office chairs (metal frames and bases)
- Conference tables (metal legs and frames)
- Shelving and bookcases (steel construction)

Home Furniture:
- Bedroom furniture (bed frames, metal headboards, wardrobes)
- Kitchen and dining furniture (tables, chairs, barstools)
- Living room furniture (metal-framed sofas, entertainment centers)
- Outdoor furniture (covered patio use - limited outdoor exposure acceptable)

Why Epoxy-Polyester for Furniture:
- Design flexibility: All colors, glosses, and textures available
- Low-temp flexibility: Furniture assembled after coating - bending/forming without cracking
- Scratch resistance: Maintains appearance despite daily contact and use
- Cost-effective: Furniture is price-sensitive - lower coating cost maintains margin

Industry Standard:
Epoxy-polyester hybrid is the global standard for metal furniture finishing. Nearly all metal office furniture, filing cabinets, and residential furniture uses this coating type.

Hardware & Tools

Power Tools:
- Electric drill housings
- Circular saw bases and guards
- Grinder and sander housings
- Power tool cases and enclosures

Hand Tools:
- Wrench and pliers handles (metal sections)
- Toolboxes and tool chests
- Measuring tools (metal components)
- Clamps and vises

Hardware Products:
- Door and window hardware (handles, hinges - interior use)
- Locks and security hardware (interior)
- Builders' hardware (brackets, fasteners, supports)
- Automotive tools and equipment

Why Epoxy-Polyester for Tools & Hardware:
- Durability: Excellent impact and scratch resistance for rough use
- Chemical resistance: Resists oils, solvents, cutting fluids encountered in workshop
- Appearance: Professional appearance important for retail sales
- Cost: Tools are cost-sensitive products - coating cost is important

Application Example:
Power tool manufacturer (Zhejiang Province):
- Product: Electric drill housings (plastic with metal motor housing)
- Coating: DAMEI epoxy-polyester, impact-resistant formulation
- Color: Tool yellow (RAL 1023) and black (RAL 9005)
- Performance: Withstands workshop abuse, excellent appearance retention

Fitness Equipment

Commercial Gym Equipment:
- Weight machines (frames, weight stacks)
- Treadmills, exercise bikes, ellipticals (frames)
- Free weight racks and benches
- Functional training equipment (cable machines, pull-up bars)
- Locker room furniture (benches, lockers)

Home Fitness Equipment:
- Home gym multi-stations
- Dumbbell and barbell racks
- Exercise benches and accessories
- Indoor bikes and rowing machines

Why Epoxy-Polyester for Fitness Equipment:
- Corrosion resistance: Perspiration (salt + moisture) is extremely corrosive - epoxy-polyester provides excellent protection
- Impact resistance: Equipment subject to dropped weights, heavy use
- Chemical resistance: Gym cleaning chemicals and disinfectants
- Appearance: Professional appearance for commercial gym environment
- Cost: Large surface area equipment - coating cost important

Performance Requirement:
Fitness equipment coating must pass "sweat test": 5% salt solution applied to coating surface, 40°C, 1000 hours - no corrosion, blistering, or coating degradation. DAMEI epoxy-polyester exceeds this requirement.

Electrical Enclosures & Cabinets

Electrical Distribution:
- Switchgear cabinets
- Motor control centers (MCC)
- Electrical panel boxes
- Junction boxes and control stations

Industrial Control:
- PLC and control cabinets
- Instrumentation enclosures
- Server and network cabinets
- Outdoor enclosures (with pure polyester coating)

Why Epoxy-Polyester for Electrical Enclosures:
- Electrical insulation: Powder coating is non-conductive (important safety feature)
- Corrosion protection: Long service life in industrial environments
- Chemical resistance: Resists industrial atmospheres, cleaning chemicals
- Fire resistance: Class A fire rating (does not support combustion)
- Appearance: Professional appearance for commercial/industrial installations

Color Standards:
- RAL 7035 (Light Gray) - global standard for electrical enclosures
- RAL 9005 (Jet Black) - IT equipment, network cabinets
- RAL 5010 (Gentian Blue) - process control equipment
- RAL 9006 (White Aluminum) - clean room, pharmaceutical applications

General Industrial Applications

Industrial Equipment:
- Machine guards and enclosures
- Material handling equipment (carts, racks, platforms)
- HVAC equipment (indoor sections)
- Pump and compressor housings
- Conveyor systems and components

Architectural Metalwork (Interior):
- Staircase railings (interior)
- Elevator cabs and doors
- Ceiling systems and light fixtures
- Decorative panels and screens
- Interior column covers

Why Epoxy-Polyester for Industrial:
- Versatility: Suitable for nearly all indoor metal finishing applications
- Mechanical properties: Excellent hardness, impact, flexibility for demanding use
- Corrosion protection: Long service life in industrial environments
- Cost-effective: Best performance-to-cost ratio for indoor applications

Application Guidelines

Surface Preparation

Proper surface preparation is critical for adhesion, corrosion protection, and coating performance.

Steel Substrates:

Method 1: Iron Phosphate Pretreatment (Standard for Appliances, Furniture)
1. Degrease: Alkaline cleaner, 60-70°C, 5-10 minutes
- Removes oils, rolling lubricants, fingerprints
2. Water Rinse: Remove cleaner residue
3. Iron Phosphate: 35-45°C, 3-5 minutes, pH 4.5-5.5
- Forms 1-3 g/m² phosphate crystal layer
- Provides adhesion and corrosion resistance
4. Water Rinse: Remove treatment chemicals
5. Deionized Water Rinse (optional, for best quality)
6. Dry: 120-150°C, ensure complete dryness

Method 2: Zinc Phosphate Pretreatment (Premium Applications)
1. Degrease (as above)
2. Water rinse
3. Zinc Phosphate: 50-60°C, 3-5 minutes
- Forms 3-5 g/m² phosphate coating
- Superior corrosion resistance vs. iron phosphate
- Higher cost (reserve for critical applications)
4. Rinse and dry

Aluminum Substrates:

Method 1: Chrome-Free Pretreatment (Standard, Environmentally Preferred)
1. Alkaline Degrease: pH 10-11, 60°C, 5 minutes
2. Water rinse
3. Chrome-Free Conversion Coating: Zirconium or titanium-based
- 50-60°C, 2-3 minutes
- Forms 20-50 mg/m² conversion layer
- Provides adhesion and corrosion protection
4. Deionized water rinse
5. Dry at 100-120°C

Method 2: Chromate Conversion Coating (Traditional)
1. Alkaline degrease
2. Deoxidize (if oxidation present): Mild acid etch
3. Chromate treatment: Forms iridescent golden conversion coating
4. Rinse and dry
5. Note: Being phased out due to Cr(VI) environmental concerns

Galvanized Steel:

1. Degrease: Remove oils, passivation compounds
2. Conditioner: Mild acid or alkaline etch (light surface preparation)
3. Zinc Phosphate: Best for galvanized (iron phosphate also acceptable)
4. Rinse and dry

Critical for Galvanized: Ensure complete removal of all oils and passivation compounds. These prevent coating adhesion and cause adhesion failure.

Application Parameters

Electrostatic Spray Application:

Equipment:
- Corona or tribo-charging spray gun
- Powder pump with consistent delivery
- Spray booth with powder reclaim system
- Properly grounded parts and booth

Recommended Parameters:

Application Technique:
- Smooth, overlapping passes (50% overlap)
- Keep gun perpendicular to surface
- Avoid excessive film build (>100 μm causes pinholes, poor flow)
- For complex shapes: Spray from multiple angles for complete coverage

Faraday Cage Effect (Recessed Areas):
Recessed areas, inside corners, and channels are difficult to coat due to electrostatic shielding:
- Solution 1: Reduce voltage (50-60 kV) and spray closer (10-15 cm)
- Solution 2: Use tribo-charging gun (no Faraday cage effect)
- Solution 3: Use low-voltage, high-flow technique

Curing Conditions

Standard Cure:
- Temperature: 180-200°C (object temperature, NOT air temperature)
- Time: 10-15 minutes at temperature
- Heating: Convection oven, infrared, or hybrid (gas or electric)

Temperature Measurement (Critical):
- Use object thermocouple attached to part (NOT air thermocouple)
- Measure thickest/coldest section of load
- Begin timing when entire load reaches cure temperature

Cure Profile:
| Stage | Temperature | Time | Purpose |
|-------|-------------|------|---------|
| Heat-up | Ambient → 180°C | 5-10 min (varies by oven) | Bring parts to cure temp |
| Cure | 180-200°C | 10-15 min | Chemical crosslinking |
| Cool-down | 200°C → 60°C | 10-15 min | Safe handling temperature |

Alternative Cure Schedules:

Low-Temperature Cure (Heat-Sensitive Assemblies):
- 160°C × 20 minutes:
- For parts with plastic inserts, rubber gaskets, pre-assembled components
- Performance: 95% of standard cure (slightly lower hardness, similar other properties)
- Cost: Higher energy cost (longer cure time), but enables coating of heat-sensitive assemblies

High-Temperature Cure (Rapid Production):
- 220°C × 8 minutes:
- For rapid production lines, high-volume manufacturing
- Performance: Equal to or better than standard cure (higher crosslink density)
- Caution: White and light colors may yellow slightly at 220°C (test first)

Quality Control & Testing

Visual Inspection:
- Color match to standard (visual and instrumental ΔE <0.5)
- Gloss level (measure with gloss meter @ 60°)
- Surface smoothness (no orange peel, craters, pinholes)
- Coverage (no bare spots, thin areas)

Film Thickness Measurement:
- Dry film thickness gauge (magnetic or eddy current)
- Target: 60-80 μm
- Measure multiple locations (minimum 5 points per part)

Adhesion Testing:
- Cross-hatch adhesion test (GB/T 9286-1998)
- Target: Grade 0 (no coating removal)
- Perform on representative parts from each batch

Cure Testing:
- MEK Rub Test: Apply MEK (methyl ethyl ketone) to cured coating with cheesecloth, rub vigorously
- Properly cured: >100 double rubs with no effect
- Under-cured: Coating softens or dissolves with <50 rubs
- Acetone Resistance: Alternative to MEK, similar procedure
- Pencil Hardness: Properly cured epoxy-polyester is >2H

Available Colors & Finishes

Standard RAL Colors

All 213 RAL Classic colors available in epoxy-polyester hybrid formulation.

Most Popular Colors for Indoor Applications:

Appliances (White Goods):
- RAL 9010 - Pure White (refrigerators, washing machines)
- RAL 9016 - Traffic White (appliances, clean room equipment)
- RAL 9006 - White Aluminum (modern appliances, electronics)
- RAL 7035 - Light Gray (industrial appliances, electrical equipment)

Furniture (Office & Home):
- RAL 9005 - Jet Black (contemporary furniture, high-end designs)
- RAL 7016 - Anthracite Gray (modern office furniture)
- RAL 9001 - Cream White (home furniture, traditional styles)
- RAL 1015 - Light Ivory (warm, welcoming furniture)

Tools & Hardware:
- RAL 1023 - Traffic Yellow (power tools - high visibility)
- RAL 3020 - Traffic Red (hand tools, safety equipment)
- RAL 5010 - Gentian Blue (professional tools)
- RAL 9005 - Jet Black (premium tools, hardware)

Electrical & Industrial:
- RAL 7035 - Light Gray (electrical enclosures - global standard)
- RAL 5010 - Gentian Blue (process control equipment)
- RAL 2004 - Pure Orange (safety equipment, high-visibility)

Custom Color Matching

Color Development Services:
- Match to any color sample, chip, or specification
- Match to Pantone, NCS, or other color systems
- Create custom brand colors with exact specification
- Minimum order: 200 kg for custom color development
- Lead time: 10-15 days from color approval

Color Consistency Guarantee:
- Batch-to-batch variation: ΔE <0.5
- Critical for OEM appliance and furniture manufacturers
- Spectrophotometer verification of every production batch

Gloss Levels

High Gloss (80-95% @ 60°):
- Premium appliances (refrigerators, washing machines)
- High-end furniture (modern, contemporary designs)
- Decorative hardware (door handles, fixtures)
- Smooth, reflective, easy-to-clean surface

Semi-Gloss (40-60% @ 60°):
- General industrial equipment
- Office furniture (professional appearance)
- Power tools (professional grade)
- Good balance of appearance and practicality

Matte / Satin (5-30% @ 60°):
- Contemporary furniture (matte trend in modern design)
- Electrical enclosures (reduces glare)
- Fitness equipment (non-reflective surface)
- Hides fingerprints and minor surface imperfections

Texture Options

Smooth (Standard):
- Glass-smooth finish
- Maximum color vibrancy and gloss
- Premium appearance for appliances and furniture

Fine Texture:
- Slight orange peel or fine sandy texture
- Hides minor surface imperfections (weld marks, slight dents)
- Reduces fingerprint visibility
- Popular for appliances, furniture, general industrial

Wrinkle / Hammertone (Specialty):
- Decorative textured effects
- Available in epoxy-polyester formulation
- Suitable for tool boxes, industrial equipment, vintage-style furniture

Special Effects (Epoxy-Polyester Compatible)

Metallic Colors:
- Silver, gold, bronze, copper metallics
- Modern aesthetic for appliances and furniture
- Indoor use only (epoxy-based metallics not UV stable outdoors)

Pearlescent Effects:
- Iridescent, color-shifting finishes
- Luxury appliance and furniture applications
- Available in all color families

Quality Assurance & Certifications

Production Quality Control

Raw Material Inspection:
- Epoxy and polyester resin quality verification (hydroxyl value, acid value, Tg)
- Pigment quality and color accuracy testing
- Additive and crosslinker purity verification
- Certificate of Analysis (COA) for all incoming materials

In-Process Quality Control:
- Particle size distribution (laser diffraction: 100% <100 μm)
- Color measurement (spectrophotometer: ΔE <0.3 vs. standard)
- Gel time and melt flow testing
- Electrostatic charging capability verification

Final Product Testing:
- Appearance: Color, gloss, surface quality
- Application: Transfer efficiency, film build, coverage rate
- Mechanical Properties (GB/T standards):
- Pencil hardness: >2H (GB/T 6739-1996)
- Impact resistance: 50 kg·cm (GB/T 1732-1993)
- Adhesion: Grade 0 (GB/T 9286-1998)
- Flexibility: 2mm @ RT, pass @ -8°C (GB/T 6742-1986)
- Corrosion Resistance:
- Salt spray: >1000 hours (GB/T 1771-1991)
- Humidity resistance: >1000 hours @ 40°C, 100% RH

Certifications & Compliance

Quality Management:
- ISO 9001:2015: Certified quality management system
- Annual third-party audits for compliance
- Continuous improvement processes

Testing Standards:
- GB/T Chinese National Standards: All testing per Chinese national standards
- ASTM: Equivalent ASTM methods available for export customers
- EN/ISO: European/ISO equivalent methods for EU export

Environmental & Safety Compliance:
- RoHS: Restriction of Hazardous Substances (lead-free, heavy metal-free)
- REACH: EU chemical regulation compliance (for European export)
- VOC: <5 g/L (effectively zero VOC)
- TGIC-Free Options: Available for all colors (safer crosslinker chemistry)

Product Documentation:
Each shipment includes:
- Certificate of Analysis (COA) with test results
- Technical Data Sheet (TDS)
- Material Safety Data Sheet (MSDS/SDS)
- Application guidelines
- Storage and handling instructions

Packaging, Storage & Delivery

Standard Packaging:
- 25 kg per carton (cardboard box with polyethylene liner bag)
- Moisture-proof packaging for long-distance shipping
- Pallet loading for container shipment (1250 kg per pallet)

Minimum Order Quantity (MOQ):
- Standard RAL colors: 200 kg (8 cartons)
- Custom colors: 200 kg (8 cartons) - lower than industry standard
- Sample orders: 25 kg (1 carton) available for spray testing

Lead Time:
- Stock colors: 5-7 days (常备库存颜色)
- Custom colors: 10-15 days from color approval
- Sample provision: 2-3 days (small quantity for testing)

Storage Requirements:
- Temperature: 15-30°C (avoid temperature extremes)
- Humidity: <60% RH (moisture absorption can affect application)
- Storage Life: 12 months from manufacture date (if stored properly in sealed packaging)
- Location: Cool, dry warehouse, away from direct sunlight and heat sources

Handling Precautions:
- Keep containers sealed when not in use (prevent moisture absorption)
- Use FIFO (first-in, first-out) inventory rotation
- Avoid storage near oxidizing agents or open flames
- Allow powder to reach room temperature before opening (prevent condensation)

Shipping:
- Domestic China: Truck freight, 3-7 days depending on destination
- Export: Sea freight (LCL or FCL), air freight for urgent orders
- Proper packaging for international transport (moisture-proof, shock-resistant)

Health, Safety & Environment

Personal Protective Equipment (PPE)

Minimum PPE for Powder Handling & Application:
- Eye Protection: Safety glasses or face shield (prevent powder contact with eyes)
- Respiratory Protection: Dust mask (N95) or respirator (P2/FFP2 filter minimum)
- Hand Protection: Nitrile or latex gloves (prevent skin contact, dermatitis)
- Body Protection: Long-sleeve work clothing, coveralls (prevent skin exposure)
- Foot Protection: Safety shoes (non-slip, covered toe)

Enhanced PPE for Spray Booth Application:
- Full-face respirator with P3 filter (if spray booth ventilation inadequate)
- Anti-static clothing and footwear (grounded to prevent static discharge)
- Hearing protection (if spray booth noise exceeds 85 dB)

First Aid Procedures

Inhalation (Powder Dust):
- Move person to fresh air immediately
- If breathing difficulty persists, provide oxygen (if trained and available)
- Seek medical attention if symptoms persist (coughing, shortness of breath)

Skin Contact:
- Wash affected area thoroughly with soap and water
- Remove contaminated clothing and wash before reuse
- If irritation or rash develops, seek medical attention
- Persistent exposure may cause dermatitis (use gloves to prevent)

Eye Contact:
- Rinse eyes with clean water for 15 minutes minimum
- Hold eyelids open to ensure thorough rinsing
- Remove contact lenses if present and easy to do
- Seek medical attention immediately if irritation persists

Ingestion (Accidental Swallowing):
- Do NOT induce vomiting
- Rinse mouth thoroughly with water
- Drink water to dilute (if person is conscious)
- Seek medical attention immediately
- Provide product label or SDS to medical personnel

Workplace Safety

Ventilation Requirements:
- Spray booth: Minimum 0.5 m/s face velocity (ensure powder overspray capture)
- Powder mixing area: Local exhaust ventilation (LEV) if generating dust
- General workspace: Adequate general ventilation (prevent dust accumulation)

Fire & Explosion Prevention:
- Combustible Dust Hazard: Powder coating is organic material, combustible in dust cloud form
- Prevent dust accumulation on surfaces (regular cleaning)
- Ground all equipment, conveyors, and metal surfaces (prevent static ignition)
- No smoking, open flames, or spark-generating equipment in powder areas
- Explosion-proof electrical equipment in powder spray booths (ATEX/IECEx compliance)

Spill Cleanup:
- Small spills: Sweep up powder carefully (avoid creating dust cloud)
- Large spills: Use vacuum with HEPA filter (do NOT use compressed air - creates dust cloud)
- Dispose of collected powder per local regulations (non-hazardous industrial waste)
- Decontaminate area after cleanup

Environmental Compliance

Air Quality:
- Zero VOC Emissions: Powder coating releases no volatile organic compounds
- Spray booth filtration: >99% powder capture efficiency (cartridge or cyclone filters)
- Complies with all global air quality regulations (EU IED, US EPA, China MEE)

Waste Management:
- Unused Powder: 100% recyclable (return to box or reclaim system)
- Contaminated Powder: Dispose as non-hazardous industrial waste (check local regulations)
- No Liquid Waste: Powder coating is dry process (no wastewater generated)
- Packaging Waste: Cardboard boxes and plastic liners recyclable

Sustainability Benefits:
- High material efficiency (>95% with reclaim vs. 40-60% liquid paint)
- Energy efficiency (fast cure, low energy per part)
- No hazardous waste disposal costs (vs. liquid paint solvents, sludge)
- Reduced carbon footprint (no VOC incineration required)

Why Choose DAMEI Indoor Epoxy-Polyester Powder Coating?

Optimized Formulation for Indoor Use

DAMEI epoxy-polyester hybrid is specifically formulated for indoor applications:
- Resin selection: Optimal epoxy/polyester ratio (60-70% / 30-40%) for indoor performance
- Pigmentation: High-quality pigments for excellent color and indoor light-fastness
- Flexibility additives: -8°C bend capability for post-coating forming and cold environment use
- Flow & leveling: Smooth, glass-like finish for premium appearance

Proven OEM Supplier Experience

DAMEI supplies epoxy-polyester powder coating to leading Chinese manufacturers:
- Appliance OEMs: Haier, Midea, Gree suppliers (refrigerator, AC, washing machine panels)
- Furniture Manufacturers: Office and home furniture producers (Guangdong, Zhejiang)
- Tool Manufacturers: Power tool brands (drill housings, saw bases, tool storage)
- Fitness Equipment: Commercial gym equipment manufacturers (frames, weight stacks)

What OEMs Value in DAMEI:
- Consistent color batch-to-batch (ΔE <0.5) - critical for brand color matching
- Reliable supply (never a production delay due to powder quality issues)
- Technical support (application troubleshooting, new product development)
- Competitive pricing (best value in the market for equivalent quality)

Complete Color & Customization Capability

• All RAL colors: 213 standard colors, full indoor performance
• Custom color matching: Any color, any sample, 200 kg minimum
• All gloss levels: High gloss to matte (5-95% @ 60°)
• All textures: Smooth to coarse, special effects available
• Fast custom development: 10-15 days (faster than most competitors)

Technical Application Support

DAMEI provides comprehensive technical support:

Pre-Production:
- Substrate pretreatment recommendations
- Application parameter optimization
- Cure schedule development
- Quality control protocols

Production:
- Troubleshooting support (hotline and on-site available)
- Process optimization for efficiency and quality
- Training for application personnel
- Quality issue resolution

Post-Production:
- Performance testing support
- Warranty claim investigation
- Continuous improvement collaboration

Quality Assurance & Certifications

• ISO 9001:2015: Third-party certified quality management
• GB/T Compliance: All testing per Chinese national standards
• Full Traceability: Raw materials to finished product documentation
• Test Reports: COA, TDS, MSDS with every shipment
• 18 Years Experience: Proven formulation and manufacturing expertise since 2007

Request Sample & Quotation

What We Provide:
✓ Epoxy-polyester powder sample (5 kg for spray testing)
✓ Color card showing standard RAL colors
✓ Technical data sheet with mechanical and chemical resistance properties
✓ Application guidelines for your specific substrate and product
✓ Pricing for your annual volume requirements
✓ Technical support for sample testing and production setup

How to Request:

1. Email sales@dameipc.com with the following information:
   - Application: Appliance, furniture, tools, fitness equipment, electrical, etc.
   - Substrate Material: Steel (cold-rolled, galvanized), aluminum, other
   - Current Pretreatment: Iron phosphate, zinc phosphate, chrome-free, etc.
   - Desired Color: RAL code or description (or request color card)
   - Gloss Level: High gloss, semi-gloss, matte, or your preference
   - Special Requirements: Low-temp cure, special flexibility, chemical resistance, etc.
   - Annual Volume: Estimated kg/year (helps us provide accurate pricing)
2. We Will Provide:
   - Product recommendation (standard or custom formulation)
   - Sample for your spray testing (5 kg, or on your substrate if provided)
   - Application parameter guidelines
   - Pricing (sample and production volume pricing)
   - Lead time for sample and production orders
3. Sample Testing Support:
   - Application troubleshooting if needed
   - Cure schedule optimization
   - Performance testing recommendations
   - Production scale-up support

Contact DAMEI:
📧 Email: sales@dameipc.com
📱 Phone: +86-139-6365-5580
📠 Fax: +86-139-6365-5580
🏭 Factory Address:
No. 1788 Weichang Road,
Lebushan Ecological Economic Development Zone,
Weicheng District, Weifang,
Shandong Province, China

🌐 Website: www.dameipc.com

Related Products

• Outdoor Pure Polyester Powder Coating - For outdoor applications requiring UV resistance
• Metallic & Art Powder Coating - Decorative effects for premium furniture and appliances
• Container House Powder Coating - For modular buildings and outdoor structures

Frequently Asked Questions (FAQs)

Q: What's the difference between epoxy-polyester hybrid and pure polyester powder coating?

A: Epoxy-polyester hybrid (60-70% epoxy, 30-40% polyester) is optimized and cost-effective for indoor use, with excellent mechanical properties and chemical resistance. Pure polyester (100% polyester resin) is required for outdoor use due to superior UV resistance. For indoor-only applications, epoxy-polyester provides equal performance at 20-30% lower cost. For outdoor applications, pure polyester is necessary (epoxy degrades in UV light).

Q: Can epoxy-polyester powder coating be used outdoors?

A: Limited outdoor use is possible (covered patio furniture, occasional sun exposure through windows), but continuous outdoor exposure will cause fading and chalking within 2-3 years. For permanent outdoor installations, use pure polyester powder coating which maintains excellent appearance for 8-10 years outdoors. The epoxy component in hybrid powder is not UV stable.

Q: What does "-8°C bend flexibility" mean and why is it important?

A: DAMEI epoxy-polyester maintains flexibility (does not crack) when bent at -8°C temperature. This is important for:

(1) Post-coating forming operations (bending, punching, assembly) performed on coated parts,

(2) Products used in cold environments (refrigerated spaces, outdoor winter use),

(3) Shipping in unheated containers during winter. Standard powder coatings become brittle when cold and crack during bending.

Q: How do I know if my powder coating is properly cured?
A: Three simple tests:

(1) MEK Rub Test: Apply MEK (methyl ethyl ketone) with cloth, rub vigorously - properly cured coating withstands >100 double rubs with no effect; under-cured softens or dissolves.

(2) Pencil Hardness: Properly cured epoxy-polyester is >2H; under-cured is softer (H or HB).

(3) Fingernail Test: Press fingernail firmly into cured coating - should not leave permanent mark. If coating indents easily, it is under-cured.

Q: What colors are available in epoxy-polyester formulation?

A: All 213 RAL Classic colors are available. We also provide custom color matching to any sample, specification, or color system (Pantone, NCS, etc.). Metallic and pearlescent effects are available in epoxy-polyester formulation for indoor use. Custom color minimum order is 200 kg.

Q: Can I use low-temperature cure for heat-sensitive assemblies?

A: Yes, DAMEI epoxy-polyester can cure at 160°C × 20 minutes (vs. standard 180-200°C × 10-15 min). This allows coating of assemblies with plastic inserts, rubber gaskets, or other heat-sensitive components. Performance is 95% of standard cure (slightly lower hardness, but all other properties similar). For extremely heat-sensitive parts, we offer 140-150°C cure formulations (special order).

Q: How does powder coating compare to liquid paint for appliances and furniture?

A: Powder coating advantages:

(1) Zero VOC vs. liquid paint solvents,

(2) Higher efficiency - 95% material use with reclaim vs. 40-60% liquid paint,

(3) Better performance - thicker film (60-80 μm vs. 25-40 μm liquid), superior mechanical properties,

(4) Lower cost - no waste disposal, higher productivity. Liquid paint advantages:

(1) Thinner film possible (if needed),

(2) Easier color changes (for very small batches). For production volumes >100 units/day, powder coating is superior in every way.

Q: What pretreatment is required for best adhesion and corrosion protection?

A: For steel: Iron phosphate (standard, cost-effective) or zinc phosphate (premium, better corrosion resistance). For aluminum: Chrome-free conversion coating (zirconium or titanium-based) or chromate (traditional, being phased out). For galvanized steel: Thorough degreasing + zinc or iron phosphate. Proper pretreatment is CRITICAL - it provides adhesion and corrosion resistance. Powder coating quality is only as good as the pretreatment.

Q: Why do some powder coated parts have rough "orange peel" texture?

A: Orange peel is caused by:

(1) Incorrect cure temperature/time (too low temp or too short time prevents full flow),

(2) Excessive film thickness (>100 μm doesn't flow properly),

(3) Contaminated surface (oils prevent proper flow),

(4) Poor powder quality (incorrect particle size or poor flow additives).

DAMEI powder has excellent flow & leveling for smooth finish. Ensure proper cure (180-200°C × 10-15 min object temp) and correct film build (60-80 μm).

Q: Can I get a sample to test on my parts before ordering production quantity?

A: Yes, we provide 5 kg samples for spray testing. Provide your substrate material, desired color/gloss, and application details. We'll send sample powder with application guidelines. You can spray test in your facility, or send us substrates and we'll apply coating and return coated samples. Sample lead time: 2-3 days. After successful testing, production orders ship in 5-7 days (stock colors) or 10-15 days (custom colors).

Q: What is the minimum order quantity for custom colors?

A: 200 kg (8 cartons × 25 kg) for custom color development - lower than industry standard 500 kg. This makes custom colors accessible for smaller manufacturers. For RAL standard colors, minimum order is only 200 kg (8 cartons). Lead time for custom colors: 10-15 days from color approval (we'll provide color sample for your approval before production).

Case Studies

Case Study 1: Refrigerator Manufacturer - White Goods Coating

Client: Major appliance manufacturer (Anhui Province, China)
Product: Refrigerator exterior panels and doors
Annual Volume: 1,200 tons powder coating (3 million panels/year)

Challenge:
- Exact white color match required (brand specification)
- Batch-to-batch color consistency critical (any variation visible to consumers)
- High-gloss smooth finish (premium appearance)
- Cost pressure (competitive appliance market)

Solution:
- Product: DAMEI Epoxy-Polyester Hybrid Powder Coating
- Color: Custom pure white (exact brand specification, ΔE <0.3)
- Gloss: 85% @ 60° (high-gloss premium finish)
- Film Build: 60-70 μm
- Substrate: Pre-treated cold-rolled steel (iron phosphate)
- Application: Automatic electrostatic spray line
- Cure: 190°C × 12 minutes (convection oven)

Results:
- Perfect color consistency: ΔE <0.3 batch-to-batch (>100 batches/year)
- Zero consumer complaints related to coating appearance
- 15% cost reduction vs. previous supplier (better pricing + less waste)
- 5-year partnership: "DAMEI is our most reliable coating supplier" - Production Manager

Case Study 2: Office Furniture Manufacturer - Metal Desk Frames

Client: Office furniture manufacturer (Guangdong Province)
Product: Metal desk frames and legs (steel tubing and sheet)
Annual Volume: 300 tons powder coating

Challenge:
- Multiple colors required (black, gray, white, custom corporate colors)
- Post-coating forming operations (bending, welding, assembly)
- Coating must not crack during assembly (flexibility required)
- Fast color changeovers (small batch production)

Solution:
- Product: DAMEI Epoxy-Polyester Hybrid (flexible formulation)
- Colors: RAL 9005 Black, RAL 7035 Gray, RAL 9010 White, + 3 custom corporate colors
- Gloss: 30-40% semi-gloss (professional office appearance)
- Film Build: 60-70 μm
- Cure: 180°C × 15 minutes
- Key Feature: -8°C bend flexibility for post-coating forming

Results:
- Zero cracking during post-coating assembly operations
- Successful color changeovers (6-8 colors/week) with powder reclaim system
- Excellent scratch resistance (desks maintain appearance through assembly, shipping, use)
- Customer feedback: "Coating flexibility allows us to streamline production by coating before final assembly."

Case Study 3: Power Tool Manufacturer - Drill Housings

Client: Power tool manufacturer (Zhejiang Province)
Product: Electric drill metal housings and components
Annual Volume: 150 tons powder coating (800,000 drills/year)

Challenge:
- Impact resistance required (tools dropped, knocked, abused)
- Chemical resistance (workshop oils, solvents, cutting fluids)
- Bright colors for brand identity and retail shelf appeal
- Cost-effective (price-sensitive consumer tool market)

Solution:
- Product: DAMEI Epoxy-Polyester Hybrid (impact-resistant formulation)
- Colors: RAL 1023 Traffic Yellow, RAL 9005 Black (two-tone design)
- Gloss: 50% semi-gloss
- Film Build: 70-80 μm (thicker for impact resistance)
- Cure: 200°C × 12 minutes

Results:
- Excellent impact resistance: Tools withstand workshop abuse, maintain appearance
- Color stays vibrant: Yellow stays bright (important for brand recognition and retail sales)
- Chemical resistance: No coating damage from workshop chemicals and oils
- Cost-effective: Lower coating cost vs. competitors while maintaining quality
- 7-year supply partnership: Expanded to entire power tool line (drills, saws, grinders)

Case Study 4: Fitness Equipment Manufacturer - Gym Equipment Frames

Client: Commercial gym equipment manufacturer (Beijing)
Product: Weight machine frames, free weight racks, benches
Annual Volume: 200 tons powder coating

Challenge:
- Perspiration corrosion (salt + moisture = extremely corrosive)
- Heavy impact resistance (dropped weights, equipment abuse)
- Easy cleaning (gym disinfectants, cleaners)
- Professional appearance (commercial gym environment)

Solution:
- Product: DAMEI Epoxy-Polyester Hybrid (corrosion-resistant formulation)
- Colors: RAL 9005 Black, RAL 7016 Anthracite Gray
- Gloss: 20-30% matte (non-reflective, hides scratches)
- Film Build: 70-80 μm
- Pretreatment: Zinc phosphate (enhanced corrosion protection)
- Cure: 190°C × 12 minutes

Results:
- Excellent perspiration resistance: "Sweat test" passed >1500 hours (far exceeds 1000 hour requirement)
- Zero rust or corrosion complaints (3 years product in field)
- Easy cleaning: Gym staff easily clean with standard disinfectants
- Impact resistance: Coating withstands dropped weights and heavy abuse
- Client testimonial: "Best coating we've used in 15 years of gym equipment manufacturing. Customers report our frames look new even after years of heavy gym use."

Last Updated: 2025-10-04 | All specifications based on DAMEI catalog data

DAMEI Powder Coating - Cost-Effective Indoor Finishing Excellence Since 2007