What Is BOPET/PE Sealing Film?
BOPET/PE sealing film, also known as BOPET/PE lidding film, polyester/PE tray film or laminated top-seal film, is a flexible packaging material that combines a biaxially oriented PET outer layer with a PE-based food-contact sealing layer.
The BOPET layer provides transparency, gloss, tensile strength, stiffness, dimensional stability and a printable surface. The modified PE layer provides heat-sealing performance against a compatible PE, modified-polyolefin or PE-coated tray flange.
HSQY supplies both easy-peel BOPET/PE lidding film and lock-seal BOPET/PE lidding film for compatible PET/PE trays, PET/EVOH/PE trays and other food containers with a suitable PE sealing surface.
The film structure, sealing behavior, barrier level, roll dimensions and functional treatments should be selected according to the actual tray, packaged food, sealing machine and storage conditions.
What Is the Difference Between BOPET/PE and PET/PE Film?
PET/PE is a general material description for a film containing a polyester layer and a polyethylene sealing layer.
BOPET/PE is a more specific PET/PE structure in which the PET outer film has been biaxially oriented during production.
Biaxial orientation improves tensile strength, stiffness, dimensional stability, optical appearance and processing performance. For this reason, BOPET is commonly selected as the outer layer of printed tray-lidding laminates.
| Comparison | PET/PE Film | BOPET/PE Film |
| PET Layer | General PET outer or structural layer | Biaxially oriented PET outer layer |
| Mechanical Performance | Depends on the selected PET grade and production process | Higher tensile strength, stiffness and dimensional stability |
| Printing | Available according to surface treatment | Commonly selected for high-quality surface or reverse printing |
| Typical Use | General laminated packaging and tray sealing | Printed easy-peel and lock-seal tray-lidding film |
How Is BOPET/PE Lidding Film Structured?
| Film Component | Main Function | Buyer Consideration |
| BOPET Outer Layer | Provides clarity, stiffness, strength, dimensional stability and printability | Confirm thickness, haze, gloss, shrinkage and surface treatment |
| Printing Layer | Carries branding, information, barcodes, QR codes and registration marks | Confirm printing side, colors, repeat length and eye-mark position |
| Lamination Adhesive | Bonds BOPET to PE and optional functional layers | Confirm cure time, bond strength, residual odor and food-contact conditions |
| Optional EVOH Barrier Layer | Reduces oxygen and MAP gas transmission | Specify target OTR, WVTR, gas mixture and shelf-life conditions |
| Modified PE Sealant Layer | Creates an easy-peel or lock seal against a compatible PE surface | Match the PE formulation to the tray flange and required seal strength |
| Optional Anti-Fog Treatment | Reduces visible condensation droplets | Confirm anti-fog side, storage temperature and required duration |
BOPET/PE Sealing Film Specifications
The following table summarizes the current HSQY easy-peel and lock-seal BOPET/PE lidding-film range. Final guaranteed values should be stated in the approved technical data sheet and purchase specification.
| Product Type | BOPET/PE Tray Lidding Film |
| Material Structure | BOPET laminated with a modified PE sealing layer |
| Seal Options | Easy peel, hard peel, lock seal or weld seal |
| Reference Thickness | Approximately 0.052–0.09 mm, equivalent to 52–90 μm |
| Roll Width Range | Approximately 150–900 mm |
| Selected Widths | 180 mm, 320 mm, 400 mm, 640 mm and custom widths |
| Reference Roll Length | Approximately 500 m, with custom lengths available |
| Core Diameter | Customized according to the tray sealing machine |
| Appearance | Clear, glossy, matte or custom printed |
| Primary Tray Application | PET/PE trays, PET/EVOH/PE trays, PE trays and PE-coated sealing surfaces |
| Anti-Fog | Optional and application-specific |
| Standard Barrier | General moisture, aroma and product protection |
| High-Barrier Option | EVOH or another functional barrier structure available by project |
| Microwave or Oven Use | Application-specific thermal grade only |
| Freezer Use | Application-specific low-temperature grade only |
| Printing | Flexographic or gravure printing available by project |
| Compatible Equipment | Manual, semi-automatic and fully automatic tray sealing machines |
| Reference MOQ | Approximately 1,000 kg per specification |
| Reference Lead Time | Approximately 10–15 days for selected standard products; confirm specialty and printed grades |
Easy-Peel BOPET/PE Lidding Film
Easy-peel BOPET/PE film is designed to provide package integrity during filling, storage and transportation while allowing the consumer to remove the lid with controlled force.
The modified PE sealant controls the way the film separates from the compatible tray flange.
A properly selected easy-peel film should provide:
Controlled peel-initiation force
Stable peel-propagation force
One-piece lid removal
Reduced film shredding or tearing
Limited sealant residue
Sufficient distribution and leakage resistance
Consistent opening after chilled storage
Review HSQY's easy-peel BOPET/PE tray lidding film for consumer-friendly opening applications.
Lock-Seal BOPET/PE Lidding Film
Lock-seal BOPET/PE film, also called weld-seal or permanent-seal film, produces a stronger and substantially non-easy-peel closure.
It is selected when liquid containment, tamper evidence, gas retention and transport security are more important than consumer peelability.
Lock-seal packages may require cutting, puncturing or tearing before use. The film should not be promoted as easy peel unless a different sealant formulation is supplied and validated.
Review HSQY's lock-seal BOPET/PE lidding film for secure food-tray closures.
Easy Peel vs. Lock Seal
| Comparison | Easy Peel | Lock Seal |
| Opening Method | Controlled manual peeling | Cutting, puncturing or tearing may be required |
| Consumer Convenience | Higher | Lower |
| Package Security | Balanced with opening convenience | Stronger resistance to accidental opening |
| Typical Applications | Salads, desserts, dairy foods and consumer-ready meals | Liquid-rich food, foodservice packs and transport-sensitive products |
| Main Risk | A weak peel formulation may reduce distribution security | Excessive seal strength may tear the film or damage the tray |
Which Trays Can BOPET/PE Film Seal?
BOPET/PE describes the film structure, but tray compatibility is determined mainly by the modified PE sealing layer and the material present on the tray flange.
| Tray Material | Compatibility Guidance | Recommended Film |
| PET/PE Tray | Primary application when the flange presents a compatible PE sealing surface | Easy-peel or lock-seal BOPET/PE |
| PET/EVOH/PE Tray | Often compatible when the outside sealing layer remains PE | Standard or EVOH high-barrier BOPET/PE |
| PE or PE-Coated Tray | May be compatible when the tray and film PE grades provide the required interaction | Application-specific BOPET/PE sealant grade |
| Plain APET or rPET Tray | Standard PE sealant may not bond directly to a plain PET surface | Direct-to-PET coated film or PET-compatible sealant |
| CPET Tray | Standard BOPET/PE should not automatically be treated as ovenable or CPET-compatible | Dedicated CPET sealing and thermal grade |
| PP or PP/EVOH/PP Tray | A PP flange normally requires a PP-compatible sealing layer | BOPET/CPP or EVOH/PP film |
| PS, PVC or Aluminum Tray | Requires substrate-specific sealing chemistry | Dedicated coated or universal-seal film |
| Coated Paperboard Tray | Compatibility depends on the polymer coating on the paperboard flange | Film matched to the exact paperboard coating |
Physical tray samples or a complete tray-layer specification should be provided before confirming a commercial film order.
For PET/PE tray applications, review HSQY's sealing film for PET/PE trays .
For PP trays, review the BOPET/CPP sealing-film range .
Key Benefits of BOPET/PE Lidding Film
High clarity: Transparent BOPET supports clear product presentation.
Glossy appearance: The BOPET outer surface provides a premium retail finish.
Mechanical strength: BOPET provides tensile strength, stiffness and dimensional stability.
Reliable heat sealing: Modified PE provides easy-peel or lock-seal performance on compatible surfaces.
Moisture resistance: PE helps reduce water-vapor transmission and supports liquid containment.
Custom printing: Logos, graphics, instructions, barcodes and eye marks can be added.
Optional anti-fog: Chilled-food visibility can be improved with an application-specific treatment.
Optional high barrier: EVOH can be added when a defined oxygen barrier is required.
Production-line compatibility: Roll dimensions and web properties can be matched to the tray sealer.
Applications of BOPET/PE Sealing Film
Chilled Ready Meals
BOPET/PE films can be used for chilled pasta, rice dishes, cooked meat, vegetables, sauces and prepared meals packed in compatible PET/PE trays.
Fresh Meat and Poultry
Application-specific easy-peel, lock-seal, anti-fog and high-barrier structures can be developed for beef, pork, chicken, turkey and processed meat.
Fish and Seafood
Fish fillets, shrimp, shellfish and prepared seafood may require moisture resistance, anti-fog treatment, puncture resistance and an EVOH barrier layer.
Salads, Fruit and Vegetables
Easy-peel and anti-fog films can be used for prepared salads, cut fruit, vegetables and chilled produce.
Respiring produce may require microperforation or controlled gas transmission rather than a high-barrier hermetic package.
Dairy Products and Desserts
Applications include cheese portions, dairy desserts, puddings, mousse and other refrigerated products packed in compatible trays.
Bakery and Confectionery
Clear or printed films can be used for cakes, pastries, confectionery and bakery trays where product visibility and moisture protection are required.
Foodservice and Central Kitchens
Lock-seal films can be evaluated for sauces, prepared meals and foodservice packs that require stronger liquid containment and distribution security.
Standard BOPET/PE vs. High-Barrier PET/EVOH/PE Film
Standard BOPET/PE film provides useful mechanical protection, moisture resistance and sealability. It should not automatically be described as a high-oxygen-barrier film.
| Comparison | Standard BOPET/PE | PET/EVOH/PE High Barrier |
| Main Protection | Mechanical strength, moisture resistance and heat sealing | Adds a defined oxygen and MAP gas barrier |
| MAP Suitability | Not automatically suitable for oxygen-sensitive MAP | Designed for validated high-barrier MAP systems |
| Required Data | Seal strength and general product-protection requirements | Target OTR, WVTR, gas mixture, tray barrier and shelf life |
| Typical Applications | General chilled food, bakery, salads and foodservice packaging | Meat, poultry, seafood, cheese and oxygen-sensitive meals |
For MAP applications, review HSQY's EVOH-based high-barrier PET/PE sealing film .
Anti-Fog BOPET/PE Film
Anti-fog treatment changes the way condensed moisture behaves on the food-facing film surface.
Instead of forming separate visible droplets, moisture spreads into a thinner and more transparent layer. Anti-fog film does not remove moisture and does not prevent condensation from occurring.
Performance depends on food temperature, moisture content, cooling speed, refrigeration temperature, temperature fluctuations, film orientation and storage duration.
Review HSQY's anti-fog PET/PE sealing-film range .
Microwave, Oven and Freezer Compatibility
Can Standard BOPET/PE Film Be Microwaved?
Standard BOPET/PE film should not automatically be described as microwaveable.
Microwave applications require a dedicated thermal grade tested with the actual tray, food, power level, heating time and steam-release instructions.
Can BOPET/PE Film Be Used in a Conventional Oven?
Standard BOPET/PE film is not automatically ovenable. Conventional-oven packaging requires a separately validated high-temperature film and a compatible ovenable tray.
Can BOPET/PE Film Be Used for Frozen Food?
Selected low-temperature structures can be developed, but the standard lock-seal grade is not specified as freezer-safe.
Freezer testing should evaluate impact resistance, film flexibility, laminate bond, seal retention and opening behavior after thawing.
Tray-Sealing Machine Compatibility
BOPET/PE rollstock can be converted for manual, semi-automatic, rotary and fully automatic tray sealing machines.
Buyers should provide:
Tray-sealer manufacturer and model
Tray mold and cavity layout
Required film width
Core inside diameter
Maximum roll outside diameter
Maximum roll weight
PE sealing side wound inside or outside
Film unwind direction
Sealing temperature
Sealing pressure
Dwell time
Production speed
Film-cutting system
Print-registration sensor
Atmospheric, gas-flush or MAP process
HSQY also supplies food tray sealing machines for standard heat sealing and selected MAP applications.
How to Establish the Correct Sealing Window
The sealing window is the range of temperature, pressure and dwell time that creates an acceptable package without damaging the film or tray.
Production trials should evaluate:
Minimum seal-initiation temperature
Maximum temperature before film or tray distortion
Required sealing pressure
Minimum effective dwell time
Hot-tack strength
Seal strength after cooling
Peel-initiation and propagation force
One-piece opening behavior
Seal-through-contamination performance
Wrinkles and channel leaks
Tray-flange deformation
Film tracking and cutting
Leak and burst resistance
Common BOPET/PE Sealing Problems
| Problem | Possible Causes | Items to Check |
| Film Does Not Seal | Incompatible tray surface, reversed film, low temperature or poor tool contact | Tray flange, PE sealing side, temperature, pressure and dwell time |
| Weak or Inconsistent Seal | Food contamination, uneven tray, unstable temperature or insufficient pressure | Flange cleanliness, tray flatness, machine controls and sealing tool |
| Easy-Peel Film Is Difficult to Open | Excessive temperature, pressure or dwell time, or an incorrect sealant grade | Confirm the easy-peel grade and adjust the sealing window |
| Seal Opens Too Easily | Insufficient sealing energy or excessively weak peel formulation | Film grade, tray surface, pressure, temperature and conditioning time |
| Film Tears Instead of Peeling | Seal strength exceeds film strength or the tray lacks an effective peel tab | Film thickness, peel force, laminate bond and tray design |
| Wrinkles in the Seal | Uneven web tension, poor tracking, tray distortion or tool misalignment | Roll tension, web alignment, tray positioning and tool flatness |
| Package Leaks | Channel leaks, contamination, film punctures, cracked trays or incomplete seals | Flange cleanliness, film integrity, tray condition and complete seal continuity |
| Film Delamination | Inadequate adhesive cure, excessive heat or chemical exposure | Bond strength, curing time, residual solvent and food composition |
| Poor Roll Feeding | Telescoping, blocking, incorrect winding or unsuitable coefficient of friction | Roll construction, storage, web tension and winding direction |
Custom-Printed BOPET/PE Film
The BOPET outer layer provides a stable and clear printing surface for branded tray packaging.
Printed-film projects can include:
Brand logos and product names
Ingredients and nutritional information
Storage, opening and preparation instructions
Barcodes and QR codes
Date-code and batch-code areas
Transparent product windows
Registration marks for automatic tray sealers
Buyers should provide editable artwork, film width, print repeat, color references, eye-mark position, tray orientation and PE sealing-side winding direction.
Food-Contact Compliance
Food-contact suitability depends on the exact BOPET resin, PE sealant, adhesive, barrier layer, anti-fog treatment, ink, food type, contact duration and storage conditions.
Buyers should request available documentation for the exact approved film grade, including:
Technical data sheet
Certificate of analysis
Food-contact declaration
Migration or compliance test reports
Seal-strength test method
Restricted-substance statements
Batch traceability information
ISO quality-system certification should not be presented as product-specific proof that every film automatically complies with all food-contact regulations.
Is BOPET/PE Sealing Film Recyclable?
BOPET and PE belong to different polymer families. A BOPET/PE laminate should not automatically be described as a mono-material or universally recyclable film.
Actual recyclability depends on:
BOPET-to-PE ratio
EVOH or other functional layers
Lamination adhesive
Printing inks and anti-fog treatments
Tray material
Whether the lid can be separated from the tray
Food contamination
Local collection and sorting infrastructure
Destination-market design-for-recycling guidelines
Mono-PET-compatible coated films or PE-rich recycling-oriented structures can be evaluated as separate projects.
Customization Options
Custom total film thickness
Custom BOPET and PE layer ratio
Easy-peel, hard-peel or lock-seal formulation
Customized peel force or weld strength
Anti-fog treatment
EVOH high-barrier structure
Custom OTR and WVTR targets
Seal-through-contamination performance
Puncture-resistant structure
Application-specific microwave or thermal grade
Application-specific freezer grade
Custom printing and registration marks
Custom roll width and length
Custom core and maximum roll diameter
Custom winding direction
Custom cartons, labels and export pallets
Quality-Control Requirements
BOPET and PE raw-material verification
Total film thickness and tolerance
Roll width and length
Core size and roll outside diameter
Winding tension and roll alignment
Transparency, haze and gloss
Lamination-bond strength
Residual solvent when applicable
Coefficient of friction
Seal-initiation temperature
Hot-tack strength
Peel or lock-seal strength
One-piece opening behavior
Puncture and tensile performance
Anti-fog testing when specified
OTR and WVTR when specified
Print color and registration accuracy
Food-contact documentation review
Information Required for a Quotation
Tray material and complete layer structure
Material on the tray sealing flange
Physical tray samples
Tray dimensions and flange width
Food or packaged product
Food filling temperature
Ambient, chilled or frozen storage conditions
Easy-peel or lock-seal requirement
Existing film sample or target peel force
Anti-fog requirement
High-barrier or MAP requirement
Required OTR and WVTR
Microwave, oven or freezer requirement
Required film thickness
Film width and roll length
Core inside diameter
Maximum roll outside diameter and weight
PE sealing-side winding direction
Tray-sealer manufacturer and model
Sealing temperature, pressure and dwell time
Production speed
Printed or unprinted film
Artwork and print repeat length
Required food-contact documentation
Order quantity and annual consumption
Destination country, port or delivery address
Frequently Asked Questions About BOPET/PE Sealing Film
What is BOPET/PE lidding film made from?
It normally consists of a biaxially oriented PET outer layer laminated to a modified PE food-contact sealing layer.
Is BOPET/PE the same as PET/PE film?
BOPET/PE is a specific PET/PE structure in which the PET outer layer has been biaxially oriented for improved strength and dimensional stability.
What does the BOPET layer do?
BOPET provides clarity, gloss, tensile strength, stiffness, dimensional stability and a printable outer surface.
What does the PE layer do?
The modified PE layer creates the heat seal and controls easy-peel or lock-seal behavior on a compatible tray flange.
Can BOPET/PE film seal PET/PE trays?
Yes. PET/PE trays with a compatible PE sealing surface are the primary application.
Can it seal PET/EVOH/PE trays?
It is often compatible when the outside sealing layer of the tray remains PE. The complete barrier and seal must still be tested.
Can BOPET/PE film seal plain APET or rPET trays?
Not necessarily. A plain PET flange may require a direct-to-PET coating or another PET-compatible sealing layer.
Can BOPET/PE film seal PP trays?
Standard compatibility should not be assumed. PP trays normally require a BOPET/CPP or another PP-compatible sealing structure.
What is the difference between easy peel and lock seal?
Easy-peel film opens with controlled force. Lock-seal film forms a stronger or substantially permanent closure.
What thicknesses are available?
The current reference range is approximately 52–90 μm, with customized thicknesses available.
What roll widths are available?
The reference width range is approximately 150–900 mm. Selected widths include 180 mm, 320 mm, 400 mm and 640 mm.
What is the standard roll length?
Selected standard products use a reference roll length of approximately 500 m.
Is anti-fog BOPET/PE film available?
Yes. Anti-fog treatment can be developed for chilled food, salads, meat, seafood, dairy and ready-meal packaging.
Is standard BOPET/PE film high barrier?
No. A defined oxygen barrier normally requires EVOH or another validated high-barrier layer.
Can BOPET/PE film be used for MAP?
Yes, when a high-barrier film is combined with a compatible high-barrier tray, reliable seal and validated MAP process.
Can standard BOPET/PE film be microwaved?
Standard film should not automatically be microwaved. A separately qualified microwave-grade film is required.
Can standard BOPET/PE film be used in an oven?
Standard film is not automatically ovenable. A dedicated high-temperature film and compatible tray are required.
Can BOPET/PE film be used for frozen food?
A low-temperature grade can be developed, but the current standard lock-seal grade is not specified as freezer-safe.
Why does the film not seal to the tray?
Common causes include an incompatible flange, reversed film, insufficient heat, inadequate pressure, short dwell time or poor tool contact.
Why does easy-peel film tear during opening?
Seal strength may exceed film strength, the laminate may be damaged or the tray may lack an effective peel tab.
Can the film seal through sauce, oil or moisture?
Selected formulations can tolerate limited contamination, but the tray flange should still be kept as clean and dry as possible.
Can BOPET/PE film be custom printed?
Yes. Logos, graphics, product information, barcodes, QR codes and registration marks can be printed according to approved artwork.
Is BOPET/PE lidding film recyclable?
It is a multi-polymer laminate and is not universally accepted in PET or PE recycling systems. The complete package requires a market-specific assessment.
What is the minimum order quantity?
The current reference MOQ is approximately 1,000 kg per specification.
What is the production lead time?
The reference lead time is approximately 10–15 days for selected standard products after the specification and deposit are confirmed.
Can I request a sample or trial roll?
Samples or trial rolls can be discussed for tray compatibility, easy-peel, lock-seal, anti-fog, barrier and production-line testing.
Request a BOPET/PE Lidding Film Quote
Looking for a BOPET/PE lidding-film manufacturer, easy-peel tray film, lock-seal film, anti-fog film or EVOH high-barrier packaging solution?
Contact HSQY to request technical recommendations, tray compatibility testing, trial rolls, custom printing, roll specifications, factory pricing and international shipping information.
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