What Is BOPET/CPP Sealing Film?
BOPET/CPP sealing film, also known as BOPET/CPP lidding film or polyester/CPP tray film, is a laminated flexible packaging material that combines a biaxially oriented PET outer layer with a cast polypropylene sealing layer.
The BOPET layer provides transparency, gloss, tensile strength, dimensional stability and a printable surface. The CPP layer provides heat-sealing performance, hot tack, flexibility and moisture resistance against a compatible polypropylene or modified-polyolefin tray flange.
HSQY supplies both easy-peel BOPET/CPP lidding film and lock-seal BOPET/CPP lidding film for compatible PP food trays.
Film structure, seal strength, roll dimensions and functional treatments can be customized according to the tray material, packaged food, sealing machine and distribution conditions.
How Is BOPET/CPP Lidding Film Structured?
| Film Component | Main Function | Packaging Benefit |
| BOPET Outer Layer | Structural and printable layer | Provides clarity, gloss, tensile strength, stiffness and dimensional stability |
| Printing Ink | Optional branding and information layer | Supports logos, graphics, product information, barcodes and registration marks |
| Lamination Adhesive | Bonds the BOPET and CPP films | Maintains laminate integrity during sealing, storage and transportation |
| CPP Sealant Layer | Food-facing heat-seal layer | Provides easy-peel or lock-seal performance against a compatible PP sealing surface |
| Optional Anti-Fog Treatment | Improves surface wettability | Helps reduce visible condensation droplets in chilled packaging |
The CPP formulation determines the seal-initiation temperature, hot-tack strength, peel force, lock-seal strength and compatibility with the tray flange.
BOPET/CPP Lidding Film Specifications
The following table summarizes the current HSQY easy-peel and lock-seal product range. Final specifications must be confirmed for the selected film grade.
| Product Type | BOPET/CPP Tray Lidding Film |
| Material Structure | BOPET laminated with CPP |
| Seal Options | Easy peel or lock seal |
| Reference Thickness | Approximately 0.052–0.09 mm, or 52–90 μm |
| Roll Width | Approximately 150–900 mm, with custom slitting available |
| Selected Widths | 180 mm, 320 mm, 400 mm, 640 mm and customized widths |
| Reference Roll Length | Approximately 500 m, with custom roll lengths available |
| Core Diameter | Customized according to the tray sealing machine |
| Appearance | Clear, glossy or custom printed |
| Anti-Fog Option | Optional and subject to application testing |
| Standard Microwave Rating | No |
| Standard Oven Rating | No |
| Standard Freezer Rating | No |
| Primary Tray Application | Compatible PP and PP-based food trays |
| Packaging Equipment | Manual, semi-automatic and automatic tray sealers after testing |
| Reference MOQ | Approximately 1,000 kg per specification |
| Reference Lead Time | Approximately 10–15 days after deposit and specification confirmation |
| Customization | Thickness, width, roll length, core, peel force, lock-seal strength, anti-fog, printing and export packaging |
Standard easy-peel and lock-seal films are not automatically suitable for microwave, oven, retort or frozen-food applications. These processes require separately developed film grades.
Easy-Peel BOPET/CPP Lidding Film
Easy-peel BOPET/CPP film is designed to form a secure seal during filling, transportation and storage while allowing the consumer to remove the lid progressively from a peel tab.
A properly matched easy-peel film should provide:
Controlled peel-initiation force
Stable peel-propagation force
One-piece film removal
Limited tearing, shredding or stringing
Minimal residue on the tray flange
Sufficient package integrity during distribution
Consistent opening after chilled storage
Review HSQY's easy-peel BOPET/CPP lidding film for consumer-friendly PP tray packaging.
Lock-Seal BOPET/CPP Lidding Film
Lock-seal BOPET/CPP film creates a stronger or substantially non-peelable bond with a compatible PP tray flange.
It is selected when leakage resistance, tamper evidence, transport stability and resistance to accidental opening are more important than manual peelability.
Lock-seal packages may require cutting, puncturing or tearing before use. They should not be promoted as easy-open packaging unless a separate peelable sealant has been developed.
Review HSQY's lock-seal BOPET/CPP lidding film for secure PP tray closures.
Easy Peel vs. Lock Seal
| Comparison | Easy Peel | Lock Seal |
| Opening Method | Controlled manual peeling | Cutting, puncturing or stronger tearing may be required |
| Consumer Convenience | Higher | Lower |
| Package Security | Balanced with opening convenience | Stronger resistance to accidental opening |
| Typical Applications | Salads, desserts, dairy products and consumer-ready meals | Liquid-rich foods, transport-sensitive meals and tamper-evident packs |
| Main Risk | Insufficient peel strength can reduce package integrity | Excessive seal strength can tear the film or damage the tray |
Which Trays Can BOPET/CPP Film Seal?
The CPP layer is primarily designed to seal against a compatible PP or modified-polyolefin tray surface.
| Tray Material | Compatibility Guidance |
| PP Tray | Primary application, subject to PP grade, tray surface and sealing tests |
| PP/EVOH/PP Tray | May be compatible when the tray's sealing surface is PP; MAP barrier must be verified separately |
| PP/EVOH/PE Tray | Compatibility depends on whether the sealing flange presents PP, PE or another modified layer |
| Plain APET or rPET Tray | Standard CPP should not automatically be expected to seal directly to PET |
| PET/PE Tray | PET/PE or BOPET/PE lidding film is normally more appropriate for a PE flange |
| CPET Tray | Requires a CPET-compatible film, especially for microwave or oven use |
| PS, PVC or Aluminum Tray | Requires a substrate-specific sealant or coating |
| Coated Paperboard Tray | Compatibility depends on the polymer coating applied to the paperboard flange |
Physical tray samples or a complete tray-layer specification should be provided before confirming a bulk film order.
For broader PP tray-film selection, review HSQY's sealing film for PP trays .
Key Benefits of BOPET/CPP Lidding Film
High transparency: Clear BOPET and CPP layers support product visibility.
Glossy appearance: The BOPET surface creates a clean and premium retail presentation.
Mechanical strength: BOPET provides tensile strength and dimensional stability.
Moisture resistance: CPP helps reduce water-vapor transmission and protects the packaged product from external humidity.
Reliable heat sealing: CPP provides useful hot tack and sealing performance against compatible PP surfaces.
Easy-peel and lock-seal options: Seal behavior can be selected according to consumer and distribution requirements.
Printable outer layer: Logos, graphics, product information and eye marks can be added.
Automatic-line compatibility: Roll dimensions and web properties can be matched to high-speed tray sealers.
Optional anti-fog: Anti-fog treatment can be developed for selected chilled applications.
Applications of BOPET/CPP Lidding Film
Chilled Ready Meals
BOPET/CPP films can be used for chilled pasta, rice dishes, cooked meat, vegetables, sauces and prepared meals packed in compatible PP trays.
Takeaway and Meal-Prep Packaging
Lock-seal or easy-peel films can be selected for central kitchens, catering companies, meal-prep suppliers and takeaway food packaging.
Fresh Meat and Poultry
Application-specific films can be evaluated for beef, pork, chicken, turkey and prepared meat products.
Meat packaging may also require anti-fog treatment, puncture resistance, contamination sealing and an EVOH high-barrier structure.
Fish and Seafood
Fish fillets, shrimp, shellfish and prepared seafood may use BOPET/CPP film when the required moisture, puncture and gas-barrier performance has been verified.
Salads, Fruit and Vegetables
Easy-peel and anti-fog versions can be used for prepared salads, cut fruit, vegetables and chilled produce.
Respiring produce may require perforation or controlled gas transmission rather than a fully hermetic film.
Dairy and Desserts
Applications include cheese portions, dairy desserts, puddings, mousse and other refrigerated foods packed in compatible PP trays.
Bakery and Confectionery
Clear or printed BOPET/CPP films can be used for cakes, pastries, confectionery and bakery trays where product visibility and moisture protection are required.
Standard BOPET/CPP vs. EVOH High-Barrier PP Film
Standard BOPET/CPP film provides useful moisture resistance, mechanical strength and sealability. It should not automatically be classified as a high-oxygen-barrier MAP film.
| Comparison | Standard BOPET/CPP | EVOH/PP High-Barrier Film |
| Oxygen Barrier | General or moderate, depending on thickness and structure | Designed for lower oxygen transmission |
| Moisture Barrier | Good due to the CPP layer | Good when EVOH is protected by PP layers |
| MAP Suitability | Requires application-specific evaluation | More suitable for validated MAP systems |
| Typical Application | General chilled meals, produce, dairy and bakery packaging | Meat, poultry, seafood, cheese and oxygen-sensitive foods |
For MAP and oxygen-sensitive food, review HSQY's EVOH/PP high-barrier lidding film .
Anti-Fog BOPET/CPP Film
Anti-fog treatment is optional for HSQY BOPET/CPP films and must be confirmed as part of the final specification.
Anti-fog treatment changes the way condensed moisture spreads over the food-facing surface. It reduces visible droplets but does not remove moisture from the package.
Anti-fog performance depends on:
Microwave, Oven, Freezer and Retort Use
Can Standard BOPET/CPP Film Be Microwaved?
No. The current standard HSQY easy-peel and lock-seal products are not specified as microwaveable.
Microwave applications require a dedicated film tested with the actual PP tray, food, microwave power, heating time and steam-release instructions.
Can Standard BOPET/CPP Film Be Used in an Oven?
No. Standard BOPET/CPP film should not be used in a conventional oven unless a dedicated high-temperature structure has been validated.
Can Standard BOPET/CPP Film Be Frozen?
The current standard products are not specified as freezer-safe.
Frozen-food packaging requires a dedicated low-temperature CPP grade tested for impact resistance, flexibility, seal retention and laminate integrity.
Can Standard BOPET/CPP Film Be Retorted?
No. Retort packaging requires a separately designed retort-grade CPP, high-temperature adhesive and validated multilayer structure.
Retort validation must include processing temperature, pressure, duration, food composition, seal integrity and post-retort laminate strength.
Tray-Sealing Machine Compatibility
BOPET/CPP rollstock can be converted for manual, semi-automatic, rotary and fully automatic tray sealing machines.
Buyers should confirm:
Machine manufacturer and model
Tray mold and cavity layout
Finished film width
Core inside diameter
Maximum roll outside diameter
Maximum roll weight
CPP sealing side wound inside or outside
Film unwind direction
Sealing temperature
Sealing pressure
Dwell time
Production speed
Film-cutting system
Registration-mark sensor
Atmospheric or MAP packaging process
HSQY also supplies food tray sealing machines for standard heat sealing and selected MAP packaging lines.
How to Establish the Correct Sealing Window
A sealing window is the range of temperature, pressure and dwell time that creates a continuous seal without damaging the tray or film.
Production trials should evaluate:
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 peel-propagation force
One-piece opening behavior
Seal-through-contamination performance
Wrinkle and channel-leak formation
Tray-flange deformation
Film tracking and cutting at production speed
Leak and burst resistance
Common BOPET/CPP Sealing Problems
| Problem | Possible Causes | Items to Check |
| Film Does Not Seal | Incompatible tray, reversed film, insufficient heat or poor tool contact | Tray flange, CPP sealing side, temperature, pressure and dwell time |
| Weak or Inconsistent Seal | Flange contamination, uneven tray, unstable temperature or low pressure | Flange cleanliness, tray flatness, sealing tool and machine controls |
| Easy-Peel Film Is Difficult to Open | Excessive heat, pressure or dwell time, or an incorrect CPP sealant grade | Confirm the easy-peel grade and reduce sealing energy within the validated range |
| Seal Opens Too Easily | Insufficient sealing energy or excessively weak peel formulation | Film grade, tray surface, temperature, pressure and conditioning time |
| Film Tears Instead of Peeling | Seal strength exceeds film strength or the tray has an inadequate peel tab | Film thickness, sealant formulation, peel force and tab design |
| Wrinkles in the Seal | Uneven web tension, poor tracking, tray distortion or tool misalignment | Roll tension, web alignment, tray position and seal-plate flatness |
| Package Leaks | Food contamination, film punctures, cracked trays or incomplete seals | Flange cleanliness, film integrity, tray condition and seal continuity |
| Laminate Delamination | Inadequate adhesive cure, excessive heat, chemical exposure or weak bond strength | Adhesive cure, residual solvent, food composition and storage conditions |
| Poor Roll Feeding | Telescoping, blocking, incorrect winding or unsuitable coefficient of friction | Roll construction, storage, winding direction and machine tension |
Custom-Printed BOPET/CPP Film
The BOPET outer layer provides a stable printing surface for branded tray packaging.
Printed-film projects can include:
Brand logos and product names
Ingredient and nutritional information
Storage and opening instructions
Barcodes and QR codes
Date-code areas
Transparent product windows
Registration marks for automatic tray sealers
Buyers should provide artwork, film width, print repeat, number of colors, eye-mark position, tray orientation and CPP sealing-side winding direction.
Food-Contact Compliance
Food-contact suitability depends on the exact BOPET resin, CPP formulation, lamination adhesive, anti-fog treatment, printing ink, food type, contact duration and storage temperature.
Buyers should request documentation for the approved commercial film, including available:
Technical data sheet
Certificate of analysis
Food-contact declaration
Migration or compliance reports
Seal-strength test method
Restricted-substance statements
Batch traceability information
ISO 9001 is a quality-management-system certification and should not be presented as product-specific proof that every BOPET/CPP film complies with all food-contact regulations.
Is BOPET/CPP Film Recyclable?
BOPET and CPP belong to different polymer families. A BOPET/CPP laminate should not automatically be described as a mono-material or universally recyclable film.
Actual recyclability depends on:
BOPET-to-CPP ratio
Lamination adhesive
Printing inks and anti-fog treatments
Tray material
Ability to separate the film from the tray
Food contamination
Local collection and sorting infrastructure
Destination-market design-for-recycling requirements
PP-rich mono-material lidding films can be evaluated as a separate recycling-focused alternative when required.
Customization Options
Custom 52–90 μm total thickness
Custom BOPET and CPP layer ratio
Easy-peel or lock-seal formulation
Customized peel force
Customized lock-seal strength
Anti-fog treatment
Seal-through-contamination performance
Puncture-resistant structure
EVOH high-barrier structure
Custom film width and roll length
Custom core and maximum roll diameter
Custom winding direction
Custom printing and registration marks
Custom cartons, labels and export pallets
Quality-Control Requirements
BOPET and CPP material verification
Total 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
Print color and registration accuracy
Food-contact documentation review
Packaging and pallet protection
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 or chilled storage conditions
Easy-peel or lock-seal requirement
Target peel or seal strength
Anti-fog requirement
High-barrier or MAP requirement
Required film thickness
Film width and roll length
Core inside diameter
Maximum roll outside diameter
CPP sealing-side winding direction
Tray-sealing machine manufacturer and model
Current 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/CPP Sealing Film
What is BOPET/CPP lidding film made from?
It consists of a BOPET outer film laminated to a CPP food-contact sealing layer.
What does the BOPET layer do?
BOPET provides clarity, gloss, tensile strength, dimensional stability and a printable outer surface.
What does the CPP layer do?
CPP provides the heat-seal interface, hot-tack performance, flexibility and moisture resistance.
Can BOPET/CPP film seal PP trays?
Yes, compatible PP trays are the primary application. The specific PP grade, tray surface and sealing parameters must still be tested.
Can it seal PP/EVOH/PP trays?
It may seal PP/EVOH/PP trays when the tray's sealing surface is a compatible PP grade.
Can BOPET/CPP film seal PET trays?
Standard compatibility should not be assumed. Plain PET trays normally require a direct-to-PET or PET-compatible sealant.
Can it seal PET/PE trays?
PET/PE or BOPET/PE lidding film is normally more appropriate when the tray flange has a PE sealing surface.
What is the difference between easy peel and lock seal?
Easy-peel film is designed for controlled manual opening. Lock-seal film provides 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?
The reference roll length is approximately 500 m, with custom conversion available.
Is anti-fog BOPET/CPP film available?
Yes. Anti-fog treatment is optional and should be tested under the intended chilled-storage conditions.
Is standard BOPET/CPP film high barrier?
It provides useful moisture resistance but should not automatically be classified as a high-oxygen-barrier film.
Can BOPET/CPP film be used for MAP?
Standard film requires evaluation. Oxygen-sensitive MAP applications normally require an EVOH/PP or another qualified high-barrier structure.
Can standard BOPET/CPP film be microwaved?
No. The current standard HSQY products are not specified as microwaveable.
Can standard BOPET/CPP film be used in an oven?
No. Conventional-oven applications require a separately validated high-temperature film and compatible tray.
Can standard BOPET/CPP film be frozen?
The current standard products are not specified as freezer-safe. A dedicated deep-freeze CPP grade is required.
Can standard BOPET/CPP film be retorted?
No. Retort packaging requires a dedicated retort-grade CPP, suitable adhesive and validated high-temperature structure.
Why does the film not seal to the tray?
Common causes include an incompatible tray surface, reversed film, insufficient heat, inadequate pressure or short dwell time.
Why does easy-peel film tear during opening?
Seal strength may exceed film strength, the film may be damaged or the tray may not provide an adequate peel tab.
Can the film seal through sauce, oil or moisture?
Selected sealants can tolerate limited contamination, but the tray flange should still be kept as clean and dry as possible.
Can BOPET/CPP film be custom printed?
Yes. Logos, graphics, product information, barcodes, QR codes and registration marks can be printed according to approved artwork.
Is BOPET/CPP lidding film recyclable?
It is a multi-polymer laminate and is not universally accepted in PET or PP 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 after the deposit and final specification 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 and production-line testing.
Request a BOPET/CPP Lidding Film Quote
Looking for a BOPET/CPP lidding-film manufacturer, easy-peel PP tray film, lock-seal film or custom anti-fog CPP 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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