Barrier Core Layer: Thickness Tolerance ±2 microns

Q: What is the primary function of the Barrier Core Layer?

To prevent oxygen and moisture transmission through vacuum pouch seals, maintaining product freshness and extending shelf life.

Q: Which materials offer the best barrier properties?

EVOH provides excellent oxygen barrier, while metallized PET or aluminum foil composites offer superior moisture and gas barrier performance.

Q: How does thickness affect barrier performance?

Thicker layers generally provide better barrier properties but increase material cost and may affect sealing characteristics; optimal thickness balances performance with processing requirements.

Component Specifications

Definition

The Barrier Core Layer is a critical component within multi-layer barrier vacuum pouch seal strips, engineered to create an impermeable barrier against oxygen, moisture, and other environmental contaminants. This layer is typically composed of specialized polymers or metalized films that prevent gas transmission, thereby extending the shelf life of packaged products by maintaining vacuum integrity and preventing spoilage.

Working Principle

Operates on the principle of molecular barrier technology, where the dense polymer matrix or metalized coating creates a physical obstruction to gas molecules (primarily O2 and H2O). During the sealing process, this layer fuses with adjacent layers under heat and pressure, forming a continuous barrier that maintains vacuum conditions by preventing atmospheric gas ingress through diffusion.

Materials

EVOH (Ethylene Vinyl Alcohol) copolymer, PA (Polyamide/Nylon), metallized PET (Polyethylene Terephthalate), aluminum foil composites, or high-barrier PVdC (Polyvinylidene Chloride) coatings. Thickness typically ranges from 15-50 microns depending on barrier requirements.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Tensile Strength	≥40 MPa
Thickness Tolerance	±2 microns
Width Compatibility	10-100 mm standard
Oxygen Transmission Rate	<0.5 cc/m²/day at 23°C, 0% RH
Heat Seal Temperature Range	140-180°C
Water Vapor Transmission Rate	<0.5 g/m²/day at 38°C, 90% RH

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 15105-2, ISO 2556, DIN 53380, ASTM F1249

Parent Products

This component is used in the following industrial products

Multi-Layer Barrier Vacuum Pouch Seal Strip

Heat-sealable strip for creating hermetic seals on vacuum pouches for meat packaging.

View Product Details

Engineering Analysis

Risks & Mitigation

Delamination from adjacent layers
Pinhole defects compromising barrier integrity
Thermal degradation during sealing
Inconsistent thickness causing seal failures

FMEA Triads

Trigger: Inadequate heat control during sealing
Failure: Thermal degradation of barrier polymers
Mitigation: Implement precise temperature monitoring and closed-loop control systems

Trigger: Contamination during manufacturing
Failure: Pinhole formation in barrier layer
Mitigation: Install cleanroom conditions and automated inspection systems

Trigger: Material incompatibility with adjacent layers
Failure: Delamination under vacuum stress
Mitigation: Conduct compatibility testing and use appropriate adhesive/tie layers

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Thickness: ±2%, Width: ±0.5 mm, Barrier properties: Must meet specified OTR/WVTR values within 10%

Test Method

ISO 15105-2 for gas transmission, ISO 2556 for water vapor transmission, ASTM F88 for seal strength testing

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Barrier Core Layer

Manufacturer profiles associated with Barrier Core Layer.

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Frequently Asked Questions

What is the primary function of the Barrier Core Layer?