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Coated BOPET Lidding Film for PP Trays

HSQY supplies coated BOPET lidding film for PP trays in easy-peel and lock-seal grades for ready meals, chilled foods, fresh produce, meat, seafood, dairy products and other food-packaging applications.

The film consists of a strong and transparent BOPET base with a functional heat-seal coating developed for compatible polypropylene sealing surfaces. Depending on the coating formulation, the film can provide controlled easy-peel opening or a stronger permanent lock seal.

Because PP trays can use different resin grades, additives, recycled content, barrier layers and flange structures, the selected lidding-film grade must be tested with the buyer’s actual tray and sealing equipment before commercial production.

What Is Coated BOPET Lidding Film?

Coated BOPET lidding film is a biaxially oriented polyester film with a functional heat-seal coating applied to one side. The BOPET base provides clarity, gloss, tensile strength, dimensional stability, puncture resistance, printability and reliable web handling.

The coated side provides the sealing interaction with the PP tray flange. Different coating chemistries can be developed for easy-peel, hard-peel, lock-seal or anti-fog performance.

A PP-compatible coated BOPET film is different from a conventional BOPET/CPP laminated film. Coated BOPET obtains its sealing performance from a functional surface coating, while BOPET/CPP film uses a separate cast-polypropylene sealing layer laminated to the BOPET outer layer.

Coated BOPET Film Types for PP Trays

Film Type	Seal Performance	Recommended Applications	Product
Easy-Peel Coated BOPET Film	Provides controlled peel force and clean consumer opening with reduced tearing, shredding or coating residue.	Chilled ready meals, salads, dairy products, desserts, fresh produce and consumer food packs.	View Easy-Peel Film
Lock-Seal Coated BOPET Film	Creates a stronger or substantially non-peelable seal for improved package integrity and tamper evidence.	Liquid-containing foods, sauces, transport-sensitive meals, institutional packs and secure food packaging.	View Lock-Seal Film

Easy-Peel vs. Lock-Seal Lidding Film

Easy-peel and lock-seal films use different coating formulations. The correct option should be selected according to the required consumer-opening experience, food type, leakage risk and distribution conditions.

Comparison	Easy-Peel Film	Lock-Seal Film
Opening method	Controlled manual peeling from the tray tab.	Cutting, puncturing or stronger tearing may be required.
Consumer convenience	Higher consumer convenience and cleaner opening.	Lower opening convenience but stronger closure.
Package security	Balances distribution security with consumer peelability.	Prioritizes seal strength, leakage resistance and tamper evidence.
Typical products	Salads, desserts, dairy products, chilled meals and retail food packs.	Sauces, liquid-rich foods, transport-sensitive meals and institutional packaging.
Main validation target	Peel initiation, peel propagation, clean removal and limited residue.	Seal strength, leak resistance, coating anchorage and package integrity.

Coated BOPET vs. BOPET/CPP Lidding Film

Both coated BOPET and BOPET/CPP films can be developed for PP trays, but their structures and sealing mechanisms are different.

Property	Coated BOPET Film	BOPET/CPP Film
Structure	BOPET base with a functional surface coating.	BOPET outer layer laminated to a CPP sealing layer.
Sealing mechanism	The functional coating bonds to the qualified PP flange.	The CPP layer heat-seals to the qualified PP or modified-polyolefin flange.
Seal options	Easy peel, hard peel, lock seal and anti-fog grades by coating formulation.	Easy peel or lock seal according to the CPP sealant formulation.
Selection requirement	Match the coating chemistry to the actual PP tray surface.	Match the CPP sealant formulation to the tray flange and processing conditions.

Buyers looking specifically for a laminated polypropylene sealing layer can review our BOPET/CPP lidding film range.

Key Benefits

PP-compatible coating grades: Functional coatings can be developed for qualified polypropylene sealing surfaces.
Easy-peel and lock-seal options: Select consumer-friendly opening or stronger permanent sealing.
High clarity and gloss: Transparent BOPET supports product visibility and premium retail presentation.
Mechanical strength: The BOPET base provides tensile strength, puncture resistance and dimensional stability.
Stable machinability: Film stiffness and web stability support compatible automatic and semi-automatic tray sealers.
Optional anti-fog treatment: Helps maintain clearer product visibility in selected chilled-food applications.
Custom printing: Logos, product information, barcodes, QR codes, instructions and eye marks can be added.
Custom roll conversion: Width, length, core, winding direction and roll diameter can be matched to the sealing machine.

Reference Specifications

The following values summarize the current standard HSQY product range. Final guaranteed specifications must be confirmed in the approved technical data sheet, tray-compatibility test and purchase specification.

Property	Standard or Available Option	Selection Note
Product type	Coated BOPET tray lidding film	Rollstock for compatible tray-sealing equipment
Base material	BOPET with functional heat-seal coating	Confirm the coating code, sealing side and PP compatibility
Seal options	Easy peel, hard peel or lock seal by project	Seal behaviour is determined by the coating and tray surface
Reference thickness	Approximately 0.052–0.09 mm, customizable	Confirm nominal gauge and thickness tolerance
Standard widths	180 mm, 320 mm, 400 mm and 640 mm	Custom widths of approximately 150–900 mm are available
Reference roll length	Approximately 500 m, customizable	Depends on gauge, width, core, roll weight and maximum outer diameter
Appearance	Clear or custom printed	Confirm haze, gloss, print coverage, transparent windows and eye marks
Anti-fog	Optional	Specify the anti-fog side, temperature, humidity, duration and test method
Printing	Flexographic or gravure printing by project	Confirm artwork, colors, repeat length, eye marks and printing orientation
Standard microwave rating	No	Microwave use requires a separately qualified film grade
Standard oven rating	No	Do not use the standard grade for conventional-oven applications
Standard freezer rating	No	Frozen applications require low-temperature validation
Reference MOQ	Approximately 1,000 kg per specification	Trial quantities depend on available grade, width and printing
Reference lead time	Approximately 10–15 days	Calculated after specification approval and deposit

PP Tray Compatibility

The term “PP tray” covers several different tray structures. The film must be matched to the polymer presented on the tray’s sealing flange, not only to the general name of the tray.

Tray Structure	Compatibility Guidance	Validation Focus
Mono PP tray	Primary application for a qualified PP-compatible coating.	PP resin grade, additives, pigments, flange geometry and seal window.
PP/EVOH/PP tray	May be compatible when the sealing surface presented on the flange is PP.	Flange structure, seal consistency, package barrier and MAP performance.
PP/EVOH/PE tray	Compatibility depends on whether the flange presents PP, PE or another modified sealing layer.	Complete layer structure and actual flange-surface identification.
Recycled-content PP tray	Potentially compatible, but the recycled resin and additive package may affect sealing behaviour.	Lot consistency, flange contamination, seal strength and peel variation.
PP-coated paperboard tray	Compatibility depends on the polymer coating and coating weight on the flange.	Paperboard distortion, coating continuity, fibre tear and seal strength.

Applications

Chilled ready meals and prepared foods
Fresh meat, poultry and seafood trays
Fresh produce, salads and cut-fruit packaging
Dairy products, cheese, dips and desserts
Bakery products and snack packaging
Sauces and liquid-containing prepared foods
MAP trays with a qualified PP sealing surface
Food-service, catering and institutional meal packs

For high-barrier or modified-atmosphere packaging, buyers must specify the required oxygen-transmission rate, water-vapor-transmission rate, gas mixture, target shelf life and complete tray structure. A standard coated BOPET film should not automatically be described as a high-barrier film.

Standard, Microwave and Retort Film Selection

Standard coated BOPET film, microwave-reheating film and retortable film are different product categories. The buyer should select the film according to the complete thermal process rather than relying only on the PP tray material.

Application	Recommended Film Direction	Important Note
Ambient or chilled food	Standard PP-compatible coated BOPET grade.	Confirm seal type, food-contact conditions and storage requirements.
Microwave reheating	Separately qualified microwave-grade lidding film.	Validate the tray, film, coating, ink, venting method, food and heating cycle.
Retort sterilization	PET/PA/RCPP retortable film or another qualified retort structure.	Standard coated BOPET film is not a substitute for retort film.
High-barrier retort	AlOx PET/PA/RCPP or another validated high-barrier retort structure.	Specify OTR, WVTR, retort temperature, time, pressure and target shelf life.

For retort applications, review our PET/PA/RCPP retortable lidding film and AlOx high-barrier retort film .

How to Select the Correct PP Tray Lidding Film

Buyers should provide the following information before requesting samples or commercial quotations:

PP tray supplier, product code, resin grade, layer structure, drawing or physical tray sample.
Tray dimensions, flange width, peel-tab design, compartment layout and tray color.
Required easy-peel, hard-peel or lock-seal performance.
Food type, oil content, acidity, moisture, filling temperature and possible flange contamination.
Ambient, chilled, frozen, microwave, retort or other thermal-processing conditions.
Required anti-fog, oxygen barrier, moisture barrier, perforation or venting performance.
Tray-sealing machine brand, model, tooling configuration and production speed.
Current sealing temperature, pressure and dwell time.
Required film thickness, width, roll length, core diameter and winding direction.
Printing artwork, number of colors, print repeat, eye marks and transparent-window requirements.
Estimated order quantity, annual demand and delivery destination.
Required food-contact, migration, quality and destination-market documentation.

Sealing and Production-Line Validation

There is no single sealing temperature suitable for every PP tray. The practical sealing window depends on the coating grade, tray-flange material, machine pressure, dwell time, tooling condition and production speed.

Common Problem	Possible Cause	Recommended Check
Film does not seal	Incorrect coating, wrong sealing side, low temperature, low pressure or short dwell time.	Confirm the PP surface, coating code, film orientation and sealing parameters.
Peel force is too high	Excessive thermal input or an unsuitable easy-peel coating grade.	Reduce temperature, pressure or dwell time and test the correct coating.
Peel force is too low	Insufficient sealing temperature, pressure, dwell time or coating compatibility.	Increase thermal input within the approved seal window and check the tray surface.
Film shreds during opening	Excessive peel strength, unsuitable film gauge or poor peel-tab geometry.	Review the coating, thickness, peel angle and tray-tab design.
Seal leakage	Food contamination, uneven pressure, damaged tooling or incomplete seal continuity.	Inspect flange cleanliness, tooling alignment and every sealing cavity.
Inconsistent web tracking	Incorrect winding, roll tension, core size, coefficient of friction or roll diameter.	Confirm the roll specification and machine setup.

Custom Coated BOPET Lidding Film

HSQY can customize coated BOPET lidding film according to the customer’s PP tray, food product, sealing equipment and distribution requirements.

Custom thickness and thickness tolerance
Custom slit width and roll length
Custom core diameter and maximum roll diameter
Easy-peel, hard-peel and lock-seal coating grades
Optional anti-fog treatment
Custom flexographic or gravure printing
Eye marks, coding areas and transparent windows
Microperforation, macro perforation or application-specific venting
Tray compatibility and seal-strength testing
Custom cartons, roll labels, pallet marks and export packaging

Why Choose HSQY?

Supply of PP trays, lidding films and tray-sealing equipment
Easy-peel and lock-seal film options
Custom roll conversion for different sealing machines
Support for physical tray-sample testing
Custom printing and anti-fog development
Export packaging and international delivery support

Request PP Tray Lidding Film Samples

Send us your PP tray sample, sealing-machine model, required seal type, roll dimensions and food application. Our team will recommend a suitable coated BOPET film grade for testing.

Request a Quote

Frequently Asked Questions

What is coated BOPET lidding film for PP trays?

It is a BOPET polyester film with a functional heat-seal coating developed to bond to a compatible PP tray flange. Depending on the coating, it can provide easy-peel or lock-seal performance.

Can coated BOPET film seal every PP tray?

No single film should be assumed to seal every PP tray. PP resin grades, recycled content, pigments, slip agents, barrier layers and flange structures can change sealing behaviour. Testing with the actual tray is required.

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

Easy-peel film provides controlled manual opening and cleaner film removal. Lock-seal film creates a stronger and substantially non-peelable closure for applications that prioritize leakage resistance and package integrity.

What is the difference between coated BOPET and BOPET/CPP film?

Coated BOPET uses a functional surface coating to create the seal. BOPET/CPP is a laminated structure containing a separate CPP sealing layer. Both can be developed for PP trays, but they require different specifications and testing.

Is standard coated BOPET film microwave safe?

No. The current standard grade should not automatically be used for microwave heating. Microwave applications require a separately qualified grade and complete package testing.

Can standard coated BOPET film be used for retort packaging?

No. Retort processing normally requires a qualified structure such as PET/PA/RCPP or another retort-grade film designed for the specified temperature, time and pressure.

Is anti-fog coated BOPET film available?

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

Can the film be printed with custom designs?

Yes. Custom printing can include logos, graphics, cooking instructions, barcodes, QR codes, registration marks, date-code areas and transparent windows.

What sealing temperature should be used?

There is no universal sealing temperature. The correct temperature depends on the coating, PP tray surface, pressure, dwell time, tooling and production speed. The sealing window must be established through testing.

What film sizes are available?

Reference thicknesses are approximately 0.052–0.09 mm. Standard widths include 180 mm, 320 mm, 400 mm and 640 mm, with custom widths of approximately 150–900 mm. The reference roll length is approximately 500 m.

Can HSQY provide samples for sealing tests?

Yes. Buyers can provide a PP tray sample, tray drawing, sealing-machine information 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 PP tray material and dimensions, required seal type, food application, storage conditions, heating process, film dimensions, core size, printing requirements, sealing-machine model, estimated quantity and delivery destination.

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