INDUSTRY COMPONENT

Barrier Layer

A specialized layer in multi-layer co-extruded films that prevents gas, moisture, and aroma transmission to protect product quality.

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Component Specifications

Definition
The barrier layer is a critical functional component in multi-layer co-extruded barrier films, engineered to provide selective permeability resistance against oxygen, water vapor, carbon dioxide, and volatile organic compounds. It maintains product shelf life, freshness, and integrity by creating a molecular barrier through specific polymer structures and additives.
Working Principle
Operates through molecular diffusion control, where the polymer matrix's crystalline structure, chain orientation, and additive chemistry create tortuous pathways that impede gas and vapor molecule movement. The barrier effectiveness is determined by factors like polymer density, polarity, and the presence of nanofillers or metallization.
Materials
Common materials include EVOH (ethylene vinyl alcohol), PVDC (polyvinylidene chloride), PA (polyamide/nylon), metallized PET or PP, aluminum foil laminates, and nanocomposite polymers. Thickness typically ranges from 2-20 microns depending on application requirements.
Technical Parameters
  • Density 0.9-1.4 g/cm³
  • Thickness Range 2-20 microns
  • Tensile Strength 20-100 MPa
  • Elongation at Break 50-500%
  • Oxygen Transmission Rate 0.1-5 cc/m²/day at 23°C, 0% RH
  • Water Vapor Transmission Rate 0.1-2 g/m²/day at 38°C, 90% RH
Standards
ISO 15105, ISO 2556, DIN 53380, ASTM D3985, ASTM F1249

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Barrier Layer.

barrier layer co-extruded film oxygen barrier moisture barrier EVOH PVDC packaging film gas transmission rate multilayer film Barrier Layer in Rubber and Plastic Product Manufacturing

Parent Products

This component is used in the following industrial products

Multi-Layer Co-Extruded Barrier Film

Plastic film with multiple layers for superior barrier properties.

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Engineering Analysis

Risks & Mitigation
  • Delamination between layers
  • Barrier property degradation over time
  • Moisture sensitivity (especially for EVOH)
  • Thermal degradation during processing
  • Incompatibility with adjacent layers
FMEA Triads
Trigger: Poor layer adhesion during co-extrusion
Failure: Delamination and loss of barrier integrity
Mitigation: Optimize tie-layer composition and processing parameters; implement inline adhesion testing
Trigger: Moisture absorption in hygroscopic materials
Failure: Reduced barrier performance and physical property degradation
Mitigation: Proper material drying before processing; use desiccant packaging; consider moisture-resistant alternatives
Trigger: Thermal degradation during processing
Failure: Formation of pinholes and reduced mechanical properties
Mitigation: Optimize temperature profiles; use thermal stabilizers; implement real-time thermal monitoring

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Thickness tolerance: ±5%; Barrier property tolerance: ±10% of specified values
Test Method
ISO 15105 for gas transmission rates; ISO 2556 for water vapor transmission; ASTM D882 for mechanical properties

Buyer Feedback

★★★★☆ 4.7 / 5.0 (8 reviews)

"Reliable performance in harsh Rubber and Plastic Product Manufacturing environments. No issues with the Barrier Layer so far."

"Testing the Barrier Layer now; the technical reliability results are within 1% of the laboratory datasheet."

"Impressive build quality. Especially the technical reliability is very stable during long-term operation."

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Frequently Asked Questions

What is the most common material for high-barrier applications?

EVOH (ethylene vinyl alcohol) is most common for high oxygen barrier applications due to its excellent gas barrier properties, especially at low humidity conditions.

How does thickness affect barrier performance?

Barrier performance generally improves with thickness, but follows a logarithmic relationship. Beyond optimal thickness (typically 5-15 microns), additional thickness provides diminishing returns while increasing material costs.

Can barrier layers be recycled?

Recyclability depends on material composition. Monolayer barriers like EVOH are more recyclable than mixed-material barriers. Recent developments include recyclable barrier solutions using compatible polymer systems.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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