Antioxidant Milk Powder Roll Film EVOH Barrier Layer

• Customization: Available
• Industrial Use: Apparel
• Transparency: Opaque
• Model NO.: Roll Film
• Layered: Basic Level
• Hardness: Soft
• Basic Level: BOPP
• Heat Seal: CPP
• Functional Layer: VMPET
• Packaging: Bag
• Bag Sealing Methods: Flat Bag Packaging
• Trademark: Bright
• Origin: Guangdong Province

Product Description

Product Attributes

Material Composition:
Core Structure: Five-layer co-extruded film with EVOH (Ethylene-Vinyl Alcohol Copolymer) as the central gas barrier layer (ethylene content: 29-38 mol% for optimized oxygen blocking)
Outer layers comprise food-grade polyethylene (PE) for moisture resistance and mechanical durability
Antioxidant System: Inner sealing layer infused with vitamin E (α-tocopherol) and tannic acid nanoparticles (0.5-1.5 wt%) to inhibit lipid oxidation and preserve bioactive compounds (e.g., insulin, immunoglobulins) in milk powder
Functional Additives:
Nano-silver (AgNPs): Embedded in the EVOH matrix (50-100 ppm) for broad-spectrum antimicrobial activity (>99% inhibition of E. coli and S. aureus)
UV Blockers: Titanium dioxide (TiO) coating on the outer surface, blocking >90% UV radiation (200-380 nm) to prevent photo-oxidation of milk solids
Barrier Performance:
Oxygen Barrier: EVOH layer delivers ultra-low oxygen transmission rate (OTR ≤0.05 cc/m²/day at 23°C, 0% RH; ASTM D3985), critical for preserving milk powder's insulin-like proteins (52 µg/g) and preventing nutrient degradation
Moisture Barrier: PE layers achieve water vapor transmission rate (WVTR ≤0.5 g/m²/day at 38°C, 90% RH; ASTM F1249), ensuring powder flowability and preventing caking
Functional Properties:
Antioxidant Efficacy: Sustained release of vitamin E and tannic acid scavenges free radicals, with DPPH radical scavenging activity ≥70% and shelf-life extension of milk powder by 40-60% (vs. standard packaging)
Optical Clarity: >92% visible light transmittance (380-760 nm; ASTM D1003) with ≤1.5% haze, enabling product visibility while blocking harmful UV
Sealing Integrity: Heat-seal strength ≥12 N/15mm (ASTM F88) for leak-proof packaging; compatible with vertical form-fill-seal (VFFS) machines (60-120 bags/minute)
Safety & Compliance:
Direct Food Contact: Complies with FDA 21 CFR, EU 10/2011, and Halal certifications. Heavy metal migration (Pb, Cd) ≤0.01 mg/kg
Non-Leachable Design: Antioxidants and AgNPs are covalently bonded to polymer chains, eliminating migration into powdered content
Product Specifications
Physical Parameters
Thickness Range: 80-120 μm (EVOH layer: 15-20 μm; PE layers: 20-30 μm each; ISO 4593)
Tensile Strength: ≥120 MPa (MD), ≥200 MPa (TD) (ASTM D882)
Puncture Resistance: ≥45N (ASTM D4833) to withstand abrasive milk powder particles
Thermal Stability: Operational range from -40°C to 100°C; thermal shrinkage ≤3% (ISO 11358)
Barrier & Functional Metrics
OTR (23°C, 0% RH): ≤0.05 cc/m²/day (ASTM D3985)
WVTR (38°C, 90% RH): ≤0.5 g/m²/day (ASTM F1249)
UV Blocking: >90% at 200-380 nm (ASTM D4329)
Antimicrobial Efficacy: >99% reduction of E. coli and S. aureus within 24h (ISO 22196)
Optical & Surface Properties
Light Transmittance: >92% (ASTM D1003)
Haze: ≤1.5% (ASTM D1003)
Coefficient of Friction: ≤0.3 (treated surface; ASTM D1894)
Processing & Quality Control
Print Compatibility: Supports 8-color rotogravure printing; adhesion strength ≥3.5 N/mm (ISO 2409)
Roll Dimensions: Width: 200-800 mm (±0.2 mm tolerance); core diameter: 76 mm (standard), 152 mm (heavy-duty)
Shelf Life: 24 months under dry conditions (<25°C, RH<40%)
Sustainability & Certifications
Recyclability: EVOH/PE structure compatible with PE recycling streams (re-recyclability rate >90%)
Carbon Footprint: ≤1.8 kg CO eq/kg (30% lower than virgin PET films; ISO 14067)
Certifications: ISO 22000, GRS (for recycled PE variants), Halal