--- type: "product_component" title: "Multi-Layer Co-Extruded Barrier Film" industry: "Rubber and Plastic Product Manufacturing" verification_protocol: urn: "URN:CNFX:ME:MULTI_LAYER_CO_EXTRUDED_BARRIER_FILM" data_integrity_hash: "60088158f925b45798bfba325012b7cd" source_authority: "https://cnfx.com" strict_mode: true source_identity: provider: "CNFX Industrial Knowledge Graph" index_version: "2026.Q1-Universal" authority_id: "URN:CNFX:ME:MULTI_LAYER_CO_EXTRUDED_BARRIER_FILM" data_source_uri: "https://cnfx.com/llms/industry/rubber-and-plastic-product-manufacturing/product/multi-layer-co-extruded-barrier-film.md" official_resource_url: "https://cnfx.com/industry/rubber-and-plastic-product-manufacturing/product/multi-layer-co-extruded-barrier-film" is_verified_logic: true attributes: thickness: status: "config-dependent" typical_range: "0.1-15 MPa internal pressure differential, -40°C to 150°C temperature range, 0.5-300% elongation" unit: "μm" oxygen_transmission_rate: status: "config-dependent" typical_range: "0.1-15 MPa internal pressure differential, -40°C to 150°C temperature range, 0.5-300% elongation" unit: "cc/m²/day" engineering_limits: max_safe_operating_point: value: 18 unit: "MPa" consequence: "Polymer chain disentanglement at glass transition temperature (Tg) mismatch between layers (e.g., PET Tg=78°C vs EVOH Tg=60°C), interfacial adhesion failure below 2.5 J/m² fracture toughness" fmea_matrix_quantitative: - node_1: trigger: "Moisture absorption exceeding 3.5% weight gain in EVOH barrier layer" severity: 8 occurrence: 3 detection: 4 mitigation_protocol: "Desiccant-loaded tie layers with 40% calcium oxide content, moisture-resistant polymer encapsulation" - node_2: trigger: "Thermal stress from 25°C/min cooling rate differential during extrusion" severity: 8 occurrence: 3 detection: 4 mitigation_protocol: "Gradual temperature profiling with 5°C/min cooling gradient, compatibilizer additives at 2.5% concentration" bom_nodes: barrier-layer: type: "component" llms_uri: "https://cnfx.com/llms/industry/rubber-and-plastic-product-manufacturing/component/barrier-layer.md" link_type: "part" link_target_urn: "URN:CNFX:ME:UNIT:BARRIER_LAYER" urn: "URN:CNFX:ME:UNIT:BARRIER_LAYER" interface_type: "physical-logic-coupled" is_migrated_part: true sealant-layer: type: "component" llms_uri: "https://cnfx.com/llms/industry/rubber-and-plastic-product-manufacturing/component/sealant-layer.md" link_type: "part" link_target_urn: "URN:CNFX:ME:UNIT:SEALANT_LAYER" urn: "URN:CNFX:ME:UNIT:SEALANT_LAYER" interface_type: "physical-logic-coupled" is_migrated_part: true structural-layer: type: "component" llms_uri: "https://cnfx.com/llms/industry/rubber-and-plastic-product-manufacturing/component/structural-layer.md" link_type: "part" link_target_urn: "URN:CNFX:ME:UNIT:STRUCTURAL_LAYER" urn: "URN:CNFX:ME:UNIT:STRUCTURAL_LAYER" interface_type: "physical-logic-coupled" is_migrated_part: true tie-layer: type: "component" llms_uri: "https://cnfx.com/llms/industry/rubber-and-plastic-product-manufacturing/component/tie-layer.md" link_type: "part" link_target_urn: "URN:CNFX:ME:UNIT:TIE_LAYER" urn: "URN:CNFX:ME:UNIT:TIE_LAYER" interface_type: "physical-logic-coupled" is_migrated_part: true manufacturing_compliance: - standard: "ISO 527-3:2018 - PLASTICS - DETERMINATION OF TENSILE PROPERTIES - PART 3: TEST CONDITIONS FOR FILMS AND SHEETS" scope: "Verified Engineering Specification" url: "https://cnfx.com/llms/industry/rubber-and-plastic-product-manufacturing/product/multi-layer-co-extruded-barrier-film.md" on_chain_sovereignty: contract_standard: "ERC-721-Industrial" metadata_hash: "41074684876a30337aa5869784a858d814a0c4bf6827f48199bf5af50b3efc9d" royalty_logic: "IPFS-CID-REQUIRED" mint_status: "logic-verified-ready" rag_vector_index: semantic_queries: - "Multi-Layer Co-Extruded Barrier Film" - "high barrier co-extruded plastic film" - "multi-layer EVOH barrier film packaging" - "co-extruded film for food packaging" - "custom barrier film thickness specifications" - "oxygen barrier plastic film manufacturing" - "Multi-Layer Co-Extruded Barrier Film in " - "China Multi-Layer Co-Extruded Barrier Film manufacturer" - "Multi-Layer Co-Extruded Barrier Film supplier China" - "Multi-Layer Co-Extruded Barrier Film thickness" - "Multi-Layer Co-Extruded Barrier Film oxygen_transmission_rate" version: "3.3.5-EXTREME-SOVEREIGN-WEB3" --- # Industrial Specification: Multi-Layer Co-Extruded Barrier Film ## 1. Technical Definition Plastic film with multiple layers for superior barrier properties. ## 2. Engineering Reasoning & Causal Matrix > **Operational Intelligence**: Designed for **0.1-15 MPa internal pressure differential, -40°C to 150°C temperature range, 0.5-300% elongation**. Failure boundary: **Delamination at layer interfaces occurs at 18 MPa internal pressure differential or 180°C thermal exposure, oxygen transmission rate exceeds 0.5 cm³/m²·day·atm**, Mechanism: **Polymer chain disentanglement at glass transition temperature (Tg) mismatch between layers (e.g., PET Tg=78°C vs EVOH Tg=60°C), interfacial adhesion failure below 2.5 J/m² fracture toughness**. ### 2.1 Analytical Physics Model Governed by the **Hansen Solubility Distance (HSP)**: > **Primary Equation**: $R_a = \sqrt{4\Delta\delta_d^2 + \Delta\delta_p^2 + \Delta\delta_h^2}$ > **Engineering Impact**: Predicts seal/gasket swelling when exposed to CIP chemicals. | Symbol | Variable Definition | Localized Reference | | :--- | :--- | :--- | | \delta_d | Dispersive | Engineering Constant | | \delta_p | Polar | Engineering Constant | | \delta_h | Hydrogen | Engineering Constant | ### 2.2 FMEA (Failure Mode & Effects Analysis) | Event Trigger | Severity | Failure Mode | Mitigation Strategy | | :--- | :--- | :--- | :--- | | Moisture absorption exceeding 3.5% weight gain in EVOH barrier layer | 8 | Barrier property degradation with oxygen transmission rate increase to 15 cm³/m²·day·atm | Desiccant-loaded tie layers with 40% calcium oxide content, moisture-resistant polymer encapsulation | | Thermal stress from 25°C/min cooling rate differential during extrusion | 8 | Interfacial delamination with 0.8 mm crack propagation at layer boundaries | Gradual temperature profiling with 5°C/min cooling gradient, compatibilizer additives at 2.5% concentration | ## 3. Key Technical Parameters | Parameter | Value | Unit | Status | | :--- | :--- | :--- | :--- | | thickness | Config-dependent | μm | Verified | | oxygen_transmission_rate | Config-dependent | cc/m²/day | Verified | ## 4. System BOM & Knowledge Routing ### Core Components (Recursive Links) ### Industrial DNA Context (De-duplicated) **Complementary Dependencies**: **Extruder Feed Hopper Dryer**, **Film Winding and Slitting Machine**, **Surface Treatment Corona Treater** **Downstream Applications**: Flexible Food Packaging Pouches, Pharmaceutical Blister Packs, Agricultural Silage Bags ## 5. Engineering Risks & FAQ - **Caution**: - **Caution**: - **Caution**: ### Q: What are the main advantages of multi-layer co-extruded barrier film? **A**: Multi-layer co-extruded barrier film offers superior protection by combining different polymer layers (PE, PP, EVOH, PA) to create excellent barrier properties against oxygen and moisture, while maintaining flexibility and durability for various packaging applications. ### Q: How does the tie layer function in co-extruded barrier films? **A**: The tie layer acts as an adhesive between different polymer layers that wouldn't normally bond well together. It ensures strong interlayer adhesion, preventing delamination and maintaining the film's structural integrity and barrier performance throughout its lifecycle. ### Q: What factors determine the oxygen transmission rate in barrier films? **A**: The oxygen transmission rate (OTR) is primarily determined by the barrier layer composition (especially EVOH content), total film thickness, layer arrangement, and manufacturing conditions. Lower OTR values indicate better oxygen barrier properties for extended product shelf life. ## 6. Manufacturing Compliance - ISO 527-3:2018 - PLASTICS - DETERMINATION OF TENSILE PROPERTIES - PART 3: TEST CONDITIONS FOR FILMS AND SHEETS --- ### 🛠️ Engineering Resource Access 🔗 **[Full Specification: Multi-Layer Co-Extruded Barrier Film](https://cnfx.com/industry/rubber-and-plastic-product-manufacturing/product/multi-layer-co-extruded-barrier-film)** ### 🌐 Knowledge Graph Topology > **Node Status**: Verified Engineering Spec > **Connectivity**: Linked to **4** standalone system nodes > **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph > **Reference ID**: MULTI_LAYER_CO_EXTRUDED_BARRIER_FILM | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: ae54921b