Lock-seal BOPP/EVOH/PE Lidding Film for PP Trays

BOPP/EVOH/PE Lidding Film Video

What Is BOPP/EVOH/PE Lidding Film?

BOPP/EVOH/PE lidding film is a multilayer high-barrier top web used to seal food trays for modified-atmosphere packaging, chilled foods, meat, poultry, seafood, dairy, cheese, and prepared meals. The BOPP outer web provides clarity, stiffness, low density, moisture resistance, and printability. EVOH provides the principal oxygen and aroma barrier. The PE-based inner structure provides toughness and heat sealing to a compatible PE sealing surface.

The standard product on this page is positioned as a permanent lock-seal film. It is intended to create a strong weld-like closure rather than a consumer easy-peel opening. Anti-fog, custom printing, and application-specific barrier levels can be developed separately.

HSQY lists thicknesses from 0.05mm to 0.09mm, roll widths from 150mm to 900mm, clear or printed formats, and a current MOQ of 1000kg. Final barrier and sealing values must be confirmed for the approved film structure, tray, food, MAP gas mixture, and storage conditions.

Important Tray-Compatibility Correction

The current page is located under the PP-tray lidding category and is titled for PP trays, but the listed structure ends with a PE sealing layer. A standard PE sealant does not automatically create a reliable lock seal to an uncoated PP tray flange.

If the product is intended for a PP/EVOH/PP or mono-PP tray, confirm that the actual inner sealant is PP-compatible, a qualified universal sealant, or that the tray flange contains a compatible PE sealing surface. Otherwise, the structure and product name should be corrected to BOPP/EVOH/PP or another accurate PP-sealing construction.

BOPP/EVOH/PE Lidding Film Image

Clear printable high-barrier lidding film

Why Use EVOH in High-Barrier Lidding Film?

• Oxygen barrier: EVOH reduces oxygen transmission and helps protect oxidation-sensitive foods.

• Aroma retention: The barrier layer helps retain product aroma and reduce flavor transfer.

• MAP gas retention: A properly designed tray-and-lid system can retain the selected CO₂, N₂, and O₂ atmosphere.

• Transparent packaging: EVOH allows high-barrier performance without using opaque aluminium foil.

• Thin functional layer: A relatively thin EVOH layer can add substantial gas-barrier functionality within a multilayer structure.

• Custom barrier levels: EVOH grade, thickness, layer position, and surrounding polymers can be adjusted to the target OTR.

• Food-waste reduction: Correctly validated barrier packaging can support product quality and the intended shelf life.

• Application versatility: Suitable structures can be developed for meat, poultry, seafood, cheese, dairy, ready meals, and other oxygen-sensitive foods.

Typical BOPP/EVOH/PE Layer Structure

The exact layer design must be confirmed in the technical data sheet. A common conceptual structure may consist of a printed BOPP outer web laminated to a coextruded PE/tie/EVOH/tie/PE sealant web.

BOPP/EVOH/PE Lidding Film Specifications

The following table retains the current commercial information while adding the technical parameters required for high-barrier MAP packaging. Guaranteed performance should be stated in the approved technical data sheet and purchase order.

Oxygen Barrier and Moisture Barrier Are Different

EVOH is primarily selected for gas and aroma barrier. The page should not state that EVOH alone automatically provides both high oxygen and high moisture barrier. Moisture protection is supplied by the complete multilayer design and must be demonstrated using WVTR data.

Why OTR Values Need Test Conditions

An OTR number is meaningful only when the test method, temperature, relative humidity, film thickness, sample conditioning, and complete laminate are stated. Supplier comparisons based on an OTR value without conditions can be misleading.

• State the complete film structure and total thickness.

• State the EVOH grade and approximate barrier-layer thickness where commercially appropriate.

• Provide temperature and relative humidity.

• Identify the test standard and equipment method.

• Clarify whether the result is for the film alone or the complete sealed package.

• Re-test after flexing, printing, lamination, storage, and distribution where barrier damage is possible.

• Use whole-pack residual-oxygen and gas-retention testing for MAP shelf-life validation.

Tray Material Compatibility

Lock Seal vs. Easy Peel

This page should focus on permanent lock-seal search intent. Easy-peel EVOH film should be offered as a separate grade or separate product page so that search engines and buyers can distinguish the opening behavior.

BOPP Outer Web vs. BOPET Outer Web

MAP Packaging Requirements

High-barrier film alone does not guarantee the intended shelf life. The complete MAP system includes the food, tray, lidding film, gas mixture, headspace, sealing process, storage temperature, package leakage, product respiration, and distribution conditions.

Anti-Fog and Product Visibility

Optional anti-fog functionality helps maintain visibility by encouraging condensed moisture to spread into a thinner transparent layer rather than forming separate droplets. It does not eliminate water vapor or condensation.

• Identify the anti-fog side and seal side.

• Define food temperature at packing and cooling.

• Specify chilled-storage temperature and humidity.

• Define visual acceptance using a rating method or approved photographs.

• Test anti-fog throughout the intended shelf life.

• Confirm coating durability after winding, printing, lamination, and tray sealing.

Seal Window and Production-Line Validation

A reliable lock-seal film needs a wide commercial sealing window. Temperature, pressure, dwell time, line speed, tray temperature, flange contamination, tooling flatness, and film tension all affect package integrity.

• Minimum seal-initiation temperature

• Maximum temperature before film or tray distortion

• Required pressure and dwell time

• Commercial tray-sealer speed

• Weld strength after cooling and storage

• Performance with oil, water, sauce, powder, meat purge, and food particles

• Consistency across every tool cavity, corner, and compartment

• Web tracking, cutting, eye-mark registration, and roll-change behavior

Seal Integrity and Barrier Failure Analysis

Custom Printing and Roll Orientation

Custom printing can include logos, product names, ingredients, MAP statements, storage instructions, barcodes, QR codes, date-code areas, traceability, and transparent viewing windows.

• Print side: Confirm surface or reverse printing on the BOPP web.

• Seal side: Identify the PE or application-specific inner sealant.

• Anti-fog side: Identify the food-facing functional surface when anti-fog is included.

• Winding direction: Approve a machine-specific winding diagram.

• Print repeat: Match the tray-sealer cutting and tooling layout.

• Eye mark: Confirm size, color, position, and distance from the film edge.

• Barrier protection: Avoid damaging the high-barrier web during printing, slitting, handling, or conversion.

Quality-Control Requirements

• OTR: Define test temperature, relative humidity, method, and maximum value.

• WVTR: Define test conditions and maximum value separately from OTR.

• Seal strength: Test the actual tray and define the required lock-seal value.

• Lamination bond: Verify bond strength before and after conditioning.

• Flex-crack resistance: Evaluate barrier retention after handling and distribution simulation.

• Puncture resistance: Important for meat, seafood, sharp edges, and stacking.

• Haze and gloss: Control product visibility and retail appearance.

• Thickness profile: Affects barrier, stiffness, roll build, and sealing.

• Coefficient of friction: Controls unwinding and machine transport.

• Roll quality: Check edge alignment, wrinkles, telescoping, splices, cores, and winding direction.

Typical Applications

• Modified-atmosphere meat, poultry, and seafood trays

• Cheese, dairy, processed meat, and deli products

• Chilled ready meals and convenience foods

• Fresh pasta, prepared vegetables, and sauces

• High-barrier trays requiring permanent tamper-evident closure

• PET/EVOH/PE or PE-seal trays using a compatible PE sealing surface

• PP-based MAP systems using a separately confirmed PP-compatible sealant

• Private-label products requiring transparent printed lidding film

• Anti-fog chilled packs requiring clear retail display

Explore HSQY's EVOH/PP high-barrier film category, PP tray sealing films, and complete lidding film range.

Information Required for an Accurate Quotation

1. Tray material, sealing-surface layer, supplier, product code, drawing, or physical sample

2. Tray dimensions, flange width, compartments, fill weight, and headspace volume

3. Food type, fat, moisture, acidity, sharp edges, filling temperature, and shelf-life target

4. Required permanent lock seal, hard peel, or easy-peel behavior

5. Target OTR and WVTR with test temperature, relative humidity, method, and units

6. MAP gas mixture, acceptable residual oxygen, and gas-retention requirement

7. Anti-fog, printing, perforation, freezer, pasteurization, or other functional requirements

8. Tray-sealing machine brand, model, tooling layout, commercial speed, pressure, temperature, and dwell time

9. Film thickness, width, roll length, core ID, maximum outer diameter, roll weight, and winding direction

10. Print side, seal side, anti-fog side, eye-mark position, and print repeat

11. Required food-contact, migration, quality, barrier, recycling, and destination-market documentation

12. Sample quantity, annual volume, delivery destination, and requested launch date

Request High-Barrier Film Samples and Pricing

Customization Services

• Custom 0.05–0.09mm thickness and tolerance

• Custom 150–900mm roll widths

• Custom roll length, core ID, maximum outer diameter, roll weight, and winding direction

• PE-, PP-, PET-, PS-, foil-, or universal-sealant structures by project

• Permanent lock-seal, hard-peel, easy-peel, and application-specific sealing grades

• Custom EVOH grade, barrier-layer thickness, OTR, WVTR, and MAP performance

• Anti-fog, anti-static, UV-screen, puncture, flex-crack, freezer, and pasteurization options

• Flexographic or gravure printing for branding, instructions, and traceability

• Custom eye marks, print repeats, transparent windows, coding areas, perforation, and venting

• Tray compatibility, seal-window, barrier, leak, gas-retention, and production-line trials

Quality and Compliance Documentation

HSQY can provide available technical, quality-management, inspection, and material documentation for the approved grade. Buyers should request the complete layer structure, technical data sheet, certificate of analysis, food-contact declaration, migration or compliance reports, OTR and WVTR reports, seal-strength method, and roll inspection criteria.

ISO 9001 is a quality-management-system certification and should not be presented as product-specific proof of food-contact safety or barrier performance. SGS or other report claims should identify the exact film structure, report number, test conditions, food type, and intended conditions of use.

Recyclability Considerations

BOPP/EVOH/PE is a multilayer structure containing more than one polymer family and should not automatically be described as recyclable in every market. Recyclability depends on layer proportions, tie layers, adhesives, inks, coatings, tray material, food residue, collection rules, and local infrastructure.

Where design for recycling is a priority, compare the current structure with a qualified PP-dominant or PE-dominant high-barrier system and verify it against the destination market’s current recycling criteria. A recyclable PP-based lidding structure is not technically identical to a conventional BOPP/EVOH/PE laminate.

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Frequently Asked Questions About BOPP/EVOH/PE Film

What is BOPP/EVOH/PE lidding film?

It is a multilayer lidding film combining a printable BOPP outer web, an EVOH oxygen-barrier layer, and a PE-based sealing structure.

What does EVOH do in the film?

EVOH provides the principal oxygen, gas, and aroma barrier. Its performance should be specified using OTR under stated test conditions.

Does EVOH also provide the moisture barrier?

The complete multilayer structure provides moisture protection. WVTR should be measured separately because oxygen barrier and water-vapor barrier are different properties.

What is a lock seal?

A lock seal is a strong permanent or weld-like closure designed for package security rather than easy consumer peeling.

Can a PE sealant seal directly to a PP tray?

Not automatically. Plain PP usually requires a PP-compatible sealant, a qualified universal layer, or a tray flange containing a compatible coating.

Can this film be used with PP/EVOH/PP trays?

Only after the actual sealing layer is confirmed as PP-compatible or the tray provides another compatible surface. A physical tray test is required.

Can the film seal PET or CPET trays?

Plain PET and CPET surfaces normally require PET-compatible sealing chemistry. The standard PE sealant should not be assumed to work.

What OTR should I specify?

The required OTR depends on the food, tray barrier, gas mixture, storage temperature, humidity, target shelf life, and acceptable residual oxygen.

Why must OTR include temperature and humidity?

Barrier test results depend on the test conditions and complete film structure. Values without temperature, humidity, method, and units are not directly comparable.

Is anti-fog available?

Yes. Anti-fog can be added for chilled foods where condensation may reduce product visibility.

Can BOPP/EVOH/PE film be custom printed?

Yes. Printing can include logos, ingredients, MAP statements, barcodes, QR codes, date-code areas, and transparent windows.

What sizes are available?

The current page lists 0.05–0.09mm thickness and custom widths from 150mm to 900mm.

Is this film suitable for MAP packaging?

Yes, after the tray barrier, film OTR, WVTR, gas mixture, residual oxygen, seal integrity, and shelf-life conditions are validated.

Is BOPP/EVOH/PE film recyclable?

It should not automatically be described as recyclable everywhere because it is a multilayer, multi-polymer structure. Evaluate the complete package and local recycling criteria.

Can I request samples before bulk production?

Yes, subject to specification and material availability. Provide the tray, food, MAP target, machine details, film dimensions, and required seal behavior.

About HSQY Plastic Group

HSQY Plastic Group supplies BOPP/EVOH/PE high-barrier lidding films, EVOH/PP films, PET/EVOH/PE films, MAP trays, PP/EVOH/PP trays, PET/EVOH/PE trays, anti-fog films, easy-peel and lock-seal films, and related food-packaging products for international B2B customers.

The team can support film-structure selection, tray compatibility, OTR and WVTR targets, MAP design, seal development, anti-fog, printing, roll conversion, samples, production-line trials, quality documentation, export packing, and international delivery.

Contact HSQY for High-Barrier Lidding Film