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Coated BOPET Lidding Film for CPET Trays

HSQY supplies coated BOPET lidding film for CPET trays in easy-peel and lock-seal grades for ready meals, prepared foods, catering packs and other tray-sealing applications.

The film uses a dimensionally stable BOPET base with a functional heat-seal coating developed to interact with a compatible CPET tray flange. Seal strength, peel performance, roll dimensions, printing and optional anti-fog properties can be customized according to the tray, food product and sealing equipment.

Because different CPET trays may use different surface formulations, the final film grade should always be verified using the buyer’s actual tray sample and production-line conditions.

What Is Coated BOPET Lidding Film?

Coated BOPET lidding film is a biaxially oriented polyester film with a functional sealing coating applied to one side. The BOPET base provides clarity, strength, stiffness, puncture resistance, printability and stable web handling, while the coating creates either controlled peel or strong adhesion to the selected tray sealing surface.

Unlike a conventional BOPET/PE or BOPET/CPP laminated film, the sealing function of coated BOPET film is primarily created by the surface coating. This structure can provide a clean appearance, consistent machinability and application-specific seal performance.

The coating chemistry must be matched to the tray material. A film designed for one CPET tray should not be assumed to seal correctly to every CPET, APET, PET/PE, PP or PS tray without testing.

Coated BOPET Film Types for CPET Trays

Film Type	Seal Performance	Recommended Applications	Product
Easy-Peel Coated BOPET Film	Controlled peel force designed for clean consumer opening with reduced tearing, shredding or coating residue.	Ready meals, prepared foods, airline meals, catering packs and consumer-friendly food packaging.	View Easy-Peel Film
Lock-Seal Coated BOPET Film	Strong permanent adhesion for applications that prioritize package integrity and tamper evidence.	Sauces, liquid-containing foods, institutional meals, transport-sensitive packs and products requiring a stronger seal.	View Lock-Seal Film

Easy-Peel vs. Lock-Seal BOPET Lidding Film

Easy-peel and lock-seal films use different coating formulations and should be selected according to the required opening experience and package-integrity target.

Selection Factor	Easy-Peel Film	Lock-Seal Film
Consumer opening	Designed to peel from the tray flange using controlled force.	Not designed for convenient manual peeling.
Package integrity	Balanced seal strength and opening convenience.	Prioritizes strong adhesion and tamper evidence.
Typical food applications	Ready meals, chilled foods and consumer retail packs.	Sauces, liquid foods and distribution-sensitive packaging.
Validation target	Peel force, clean opening, no shredding and no residue.	Seal strength, leak resistance and coating anchorage.

Key Benefits of Coated BOPET Lidding Film

CPET-compatible coating grades: The sealing layer can be developed and tested for qualified CPET tray surfaces.
Easy-peel or lock-seal options: Select controlled consumer opening or stronger permanent sealing.
High transparency: Clear film supports product visibility and premium retail presentation.
Stable machine performance: BOPET provides stiffness, dimensional stability and reliable web handling on compatible tray-sealing equipment.
Optional anti-fog treatment: Helps maintain clearer product visibility in humid or chilled packaging environments.
Custom printing: Branding, instructions, barcodes, QR codes, eye marks and transparent windows can be added.
Custom roll conversion: Film width, roll length, core size, winding direction and maximum roll diameter can be matched to the sealing machine.

Reference Specifications

The following specifications are reference commercial options. Final values must be confirmed in the approved technical data sheet, tray compatibility test and purchase specification.

Property	Available Option	Purchasing Note
Product type	Coated BOPET tray lidding film	Rollstock for compatible tray-sealing equipment
Base material	BOPET with functional heat-seal coating	Confirm the exact coating code and sealing side
Seal type	Easy peel or lock seal	Select according to peel force and package-integrity requirements
Reference thickness	0.052–0.09 mm, customizable	Confirm nominal thickness and tolerance
Standard widths	180 mm, 320 mm, 400 mm and 640 mm	Custom widths approximately 150–900 mm are available by project
Reference roll length	500 m, customizable	Depends on thickness, width, core, roll weight and maximum outer diameter
Appearance	Clear or custom printed	Specify haze, gloss, print coverage and transparent window requirements
Anti-fog	Optional	Specify anti-fog side, temperature, humidity, duration and acceptance method
Printing	Custom flexographic or gravure printing	Confirm artwork, colors, repeat length, eye marks and print orientation
Oven, microwave or freezer use	Application-specific grade only	Do not assume the standard grade is ovenable, microwave-safe or freezer-safe
MOQ	Confirmed according to film grade and conversion requirements	Printing and custom coating normally require a higher MOQ than standard clear film

Applications

Coated BOPET lidding films can be developed for a wide range of CPET food packaging applications, including:

Prepared meals and ready-to-heat food trays
Airline and institutional meal packaging
Catering and food-service trays
Pasta, rice, meat and vegetable meal packs
Sauce-containing and liquid-containing prepared foods
Single-compartment, two-compartment and three-compartment CPET trays
Clear or custom-printed retail food packaging

For oven, microwave, frozen-storage or high-barrier applications, the complete film, coating, ink, tray and food system must be separately specified and tested.

How to Select the Correct CPET Lidding Film

Selecting a lidding film only by the general description “CPET film” can lead to weak seals, excessive peel force, film shredding or leakage. Buyers should provide the following information before sampling or quotation:

CPET tray supplier, product code, material structure, drawing or physical tray sample.
Tray dimensions, flange width, peel-tab design, compartment layout and fill weight.
Required easy-peel, hard-peel or lock-seal performance.
Food type, filling temperature and possible oil, sauce, moisture or powder contamination.
Chilled, ambient, frozen, microwave or conventional-oven conditions.
Required anti-fog, barrier, venting, perforation or printing functions.
Tray-sealing machine brand, model, tooling layout and production speed.
Current sealing temperature, pressure and dwell time.
Film width, roll length, core inside diameter, maximum outer diameter and winding direction.
Required food-contact, migration, quality and destination-market documentation.

Tray-Sealing and Production-Line Validation

The practical sealing window depends on the actual CPET flange, coating grade, machine pressure, dwell time and commercial production speed. A laboratory seal result should therefore be followed by a production-line trial.

Common Problem	Possible Cause	Recommended Check
Film does not seal	Incorrect coating grade, wrong sealing side, low temperature, insufficient pressure or short dwell time	Confirm tray material, coating code, sealing orientation and sealing window
Peel force is too high	Excessive sealing temperature, pressure or dwell time, or an unsuitable coating grade	Reduce thermal input and test the correct easy-peel coating
Film shreds during opening	Excessive peel force, unsuitable film gauge or poor peel-tab geometry	Review film thickness, coating, peel angle and tray design
Seal leakage	Food contamination on the flange, uneven pressure, damaged tooling or insufficient seal continuity	Inspect flange cleanliness, tooling alignment and every sealing cavity
Film tracks inconsistently	Incorrect winding, roll tension, coefficient of friction or roll dimensions	Confirm roll direction, core, outer diameter, tension and machine setup

Custom Coated BOPET Lidding Film

HSQY can support application-specific coated BOPET lidding film development and roll conversion according to the buyer’s packaging system.

Custom film thickness and thickness tolerance
Custom slit width, roll length and roll weight
Custom core size, maximum roll diameter and winding direction
CPET-compatible easy-peel and lock-seal coating grades
Optional anti-fog and application-specific barrier structures
Custom flexographic or gravure printing
Eye marks, print repeats, coding areas and transparent windows
Microperforation, macro perforation or application-specific venting
Tray compatibility, peel-force, seal-strength and leak testing
Export cartons, roll labels, pallet marks and international delivery

Why Source CPET Lidding Film from HSQY?

Integrated supply of CPET trays and compatible lidding-film solutions
Easy-peel and lock-seal grades for different packaging requirements
Custom roll conversion for automatic and semi-automatic tray sealers
Support for tray sample testing and production-line validation
Custom printing, anti-fog and application-specific film development
Technical documentation and export packaging support

Request Coated BOPET Film Samples and Pricing

Send us your CPET tray sample, sealing-machine information, required seal type, roll dimensions and application conditions. Our team will recommend a suitable film grade for testing.

Request a Quote

Frequently Asked Questions

What is coated BOPET lidding film?

Coated BOPET lidding film is a biaxially oriented PET film with a functional heat-seal coating. The BOPET base provides clarity and mechanical stability, while the coating creates adhesion or controlled peel from a compatible tray flange.

Can coated BOPET film seal to CPET trays?

Yes. A CPET-compatible coating grade can seal to a qualified CPET tray surface. However, the film should be tested with the actual tray because CPET surface formulations and flange conditions may vary between suppliers.

What is the difference between easy-peel and lock-seal film?

Easy-peel film provides controlled opening force for consumer convenience. Lock-seal film creates stronger, more permanent adhesion for applications that prioritize package integrity, leak resistance and tamper evidence.

Is coated BOPET lidding film oven safe?

Not every coated BOPET film is oven safe. Ovenable applications require a separately qualified thermal grade that has been tested with the complete CPET tray, film, coating, ink, food product, heating temperature and heating time.

Can the film be used in a microwave or freezer?

Microwave and freezer performance are grade-specific. The standard film should not be assumed to support these conditions unless the technical data sheet and package validation specifically confirm them.

Is anti-fog coated BOPET film available?

Yes. Anti-fog treatment can be added to suitable coated BOPET grades. Buyers should specify the storage temperature, humidity, test duration, anti-fog side and required acceptance standard.

Can coated BOPET lidding film be custom printed?

Yes. Custom printing can include logos, product information, cooking instructions, barcodes, QR codes, eye marks, date-code areas and transparent windows. Printing requirements should be confirmed before production.

What film sizes are available?

Reference options include thicknesses of 0.052–0.09 mm, standard widths of 180 mm, 320 mm, 400 mm and 640 mm, custom widths of approximately 150–900 mm and a reference roll length of 500 m. Final dimensions depend on the sealing machine and project requirements.

What determines the sealing temperature?

The sealing temperature depends on the coating grade, CPET flange surface, machine pressure, dwell time, tooling design and production speed. The correct sealing window should be established through testing rather than using one fixed temperature for every application.

Can HSQY provide samples for tray-sealing tests?

Yes. Buyers can provide a CPET tray sample, tray drawing, sealing-machine details and required seal performance. HSQY can recommend a suitable coated BOPET grade for laboratory and production-line testing.

What information is required for a quotation?

Please provide the CPET tray material and dimensions, required easy-peel or lock-seal performance, food application, storage and heating conditions, film thickness, roll width, roll length, core size, printing requirements, sealing-machine model, estimated order quantity and delivery destination.

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