PET/AL/PA/PE Multi-Layer Composite Structure
This advanced multi-layer composite structure integrates four
functional material layers to optimize preservation, containment,
and handling characteristics for sensitive industrial compounds.
Product Overview
This high-performance plastic compounds bag is engineered for
industrial bulk storage applications requiring superior barrier
protection and mechanical durability. The proprietary PET/AL/PA/PE
multi-layer composite structure delivers exceptional preservation
and containment performance.
Material Science Specifications
PET Layer (Outer)
Composition: Polyethylene Terephthalate (Polyester)
Function: Provides structural rigidity, surface abrasion resistance, and
printability for identification labeling
Performance: Maintains dimensional stability under mechanical stress (ASTM
D638)
AL Layer (Barrier)
Composition: High-purity aluminum foil (≥99.5% Al)
Function: Imposes absolute impermeability to oxygen (OTR <0.1 cc/m²/day),
water vapor (WVTR <0.1 g/m²/day), and UV radiation (380-780nm)
Performance: Meets FDA 21 CFR 175.300 for food contact applications
PA Layer (Reinforcement)
Composition: Biaxially-oriented Polyamide 6 (Nylon 6)
Function: Enhances puncture resistance (ASTM D3787) and tensile strength
(≥120 MPa) while maintaining flexibility
Performance: Withstands cyclic loading conditions per ASTM D882
PE Layer (Sealing)
Composition: Low-Density Polyethylene (LDPE) with heat-sealant co-polymer
Function: Enables hermetic sealing at temperatures ≥120°C with peel strength
≥1.5 N/15mm (ASTM F88)
Performance: Chemically inert per USP Class VI standards
Engineering Advantages
- Barrier System: Sequential material selection creates a tortuous diffusion path
for contaminants, achieving 10³ improvement over single-layer
alternatives
- Mechanical Resilience: PA reinforcement layer provides 40% higher puncture resistance
compared to non-reinforced structures (ASTM D6891)
- Thermal Performance: Maintains integrity from -40°C to 80°C per ASTM D1922
- Logistical Efficiency: Extra-large dimensions (customizable up to 2000mm × 1500mm) reduce
palletization requirements by 30%
Regulatory Compliance
- Meets ISO 9001:2015 quality management standards
- Complies with FDA 21 CFR 177.1520 for food contact applications
- RoHS 3 compliant for electronics packaging
Industrial Applications
Food & Beverage
Gourmet coffee, tea, spices, dehydrated soups, rations,
pharmaceutical nutritional supplements, oxygen-sensitive oils
Pharmaceutical & Medical
Sterile medical devices, diagnostic test kits, effervescent
tablets, powder formulations
Technical & Industrial
High-purity chemical intermediates, moisture-sensitive powders,
light-sensitive compounds, electronic components, desiccants,
agrochemicals, specialty chemicals
Technical Support
Our materials engineering team provides comprehensive technical
support including permeation data for specific chemical compounds,
finite element analysis of bag performance under load, and
customized layer thickness optimization.
