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Coated BOPET Lock-Seal Lidding Films for APET Trays

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Coated BOPET Lock-Seal Lidding Films for Trays

BOPET-coated lidding film is a high-performance sealing material used in food packaging. It creates a strong, permanent seal and offers excellent transparency. Suitable for sealing various trays, including PET, PP, and PE, it maintains outstanding clarity and gloss to enhance the product’s premium appearance.

Brand:
HSQY
Product Type:
Tray lidding film
Colour:
Clear, Custom
Width:
180mm, 320mm, 400mm, 640mm, Custom

Availability:



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BOPET Coated Lidding Films

BOPET Coated Lidding Films

BOPET Coated Lidding Film Overview Video

What Is BOPET Coated Lidding Film?

BOPET coated lidding film is a heat-sealable polyester film made from a biaxially oriented PET substrate with a functional sealing coating on one side. The BOPET base provides clarity, tensile strength, dimensional stability, puncture resistance, printability, and stable web handling. The coating provides the seal interaction with a compatible tray flange.

Unlike a conventional BOPET/PE or BOPET/CPP laminate, a coated BOPET film obtains its sealing function from a purpose-designed surface coating. Different coating chemistries can be developed for APET, CPET, PP, PE, or PS trays and for lock-seal, easy-peel, or anti-fog performance.

The phrase “compatible with multiple trays” should describe a family of coated grades, not one universal film that automatically seals every substrate. The correct grade must be selected using the actual tray material, flange surface, food application, sealing machine, and processing conditions.

BOPET Coated Lidding Film Image

BOPET coated lidding film with functional heat-seal coating for food trays

BOPET Coated Lidding Film Data Sheets

Download the available product documents below. Before ordering, confirm that each document corresponds to the exact coating grade, tray substrate, seal type, thickness, and intended conditions of use.

PDF icon for BOPET coated lidding film data sheet Download BOPET Coated Lidding Film Data Sheet

PDF icon for BOPET coated lidding film test report Download BOPET Coated Lidding Film Test Report

How a Heat-Seal Coating Works

Film Component	Primary Function	What Must Be Specified
BOPET Base Film	Provides strength, clarity, stiffness, thermal dimensional stability, printability, and machinability.	Gauge, haze, gloss, shrinkage, tensile properties, surface treatment, and recycled-content requirement.
Heat-Seal Coating	Creates adhesion or controlled peel to the selected tray sealing surface.	Tray substrate, coating chemistry, coating weight, seal initiation temperature, seal window, and target seal strength.
Optional Anti-Fog System	Reduces discrete condensation droplets and maintains clearer chilled-food presentation.	Anti-fog side, test temperature, humidity, test duration, coating durability, and food-contact conditions.
Printing or Primer Surface	Supports ink, adhesive, branding, coding, and reverse-print laminating processes.	Surface energy, corona treatment, primer type, print method, colors, repeat, and ink compatibility.
Optional Barrier or Lamination	Adds oxygen, moisture, aroma, puncture, or thermal performance not provided by the base coated film.	OTR, WVTR, thermal cycle, complete structure, adhesive, and shelf-life target.

Available Coating Grades

Coating Grade	Primary Performance	Typical Application
PET-Compatible Lock Seal	Strong permanent seal to a qualified APET, rPET, PETG, or CPET sealing surface.	Tamper-evident trays, liquid-containing foods, and distribution-sensitive packs.
PET-Compatible Easy Peel	Controlled peel force with reduced tearing, shredding, or residue.	Produce, salads, dairy, desserts, chilled foods, and consumer-ready meals.
Polyolefin-Compatible Grade	Special coating developed for qualified PP or PE sealing surfaces.	PP or PE trays where a standard PET seal coating would not provide a reliable bond.
PS-Compatible Grade	Coating chemistry matched to PS or HIPS tray flanges.	Dairy, bakery, desserts, chilled foods, and specialist trays.
Universal Multi-Substrate Grade	Specially engineered coating designed to seal to several material families.	Converters and packers using multiple tray types; every substrate still requires validation.
Anti-Fog Grade	Adds chilled-display clarity to a compatible lock-seal or peel-seal coating.	Fresh produce, salads, meat, seafood, dairy, bakery, and ready meals.

BOPET Coated Lidding Film Specifications

The following values retain the current page information while separating the standard commercial specification from grade-specific performance. Final values should be confirmed in the approved technical data sheet and purchase specification.

Property	Standard or Available Option	Selection Note
Product Type	Coated BOPET tray lidding film	Rollstock for tray-sealing equipment
Base Material	BOPET with functional heat-seal coating	Confirm whether the grade is coated, coextruded, laminated, or a combination
Thickness	0.052–0.09mm, customizable	Confirm nominal gauge and tolerance
Standard Widths	180mm, 320mm, 400mm, and 640mm	Broader custom range: 150–900mm
Roll Length	500m, customizable	Depends on thickness, width, core, roll weight, and maximum outer diameter
Color	Clear or custom printed	Confirm haze, gloss, print coverage, transparent windows, and eye marks
Seal Type	Lock seal, easy peel, or other grade by project	Seal type is determined by coating chemistry and tray surface
Anti-Fog	Optional	Specify test conditions, duration, anti-fog side, and acceptance criteria
Tray Compatibility	APET, CPET, PP, PE, and PS grades available	Do not assume one grade seals every listed substrate
Microwave / Oven Use	No for the current standard grade	A separately qualified thermal grade is required
Freezer Use	No for the current standard grade	A low-temperature grade requires separate validation
Reference Density	Approximately 1.36g/cm³ for the listed product	Finished density depends on coating and complete structure
Printing	Flexographic or gravure printing by project	Confirm surface or reverse printing, colors, repeat, eye mark, and annual volume
MOQ	1000kg	Trial quantity depends on available stock, width, coating grade, and printing
Payment Terms	T/T: 30% deposit and 70% before shipment; L/C	Confirm in the commercial quotation
Delivery Terms	FOB, CIF, EXW, and DDU	Subject to destination, order size, and commercial agreement
Lead Time	10–15 days after specification approval and deposit	Custom coating, printing, or specialty grades may require more time

Tray Compatibility Matrix

Tray Material	Coating Requirement	Validation Focus
APET / rPET / PETG	PET-compatible coating or qualified universal sealant.	Low seal initiation temperature, tray distortion, peel force, residue, and seal consistency.
CPET	CPET-compatible coating; a separate thermal grade is required when the lid remains on during heating.	Tray crystallinity, coating chemistry, seal strength, peel after heating, and complete oven or microwave cycle.
PP	PP-compatible or universal coating.	PP resin grade, additives, flange geometry, sealing window, and peel or weld behaviour.
PE / PE-Coated Tray	PE-compatible or universal coating.	PE grade, contamination tolerance, seal initiation, package distortion, and leakage.
PS / HIPS	PS-compatible coating.	Tray stiffness, flange condition, seal strength, clean peel, and stress cracking.

A tray name alone is not enough to confirm compatibility. The actual flange surface may include coatings, tie layers, recycled content, slip agents, pigments, or other additives that change sealing behaviour.

Lock Seal vs. Easy Peel

Seal Type	Opening Behaviour	Typical Use
Lock Seal / Permanent Seal	Creates a strong bond; opening may tear the film or visibly damage the tray flange.	Tamper-evident packs, liquids, transport-sensitive foods, and institutional packaging.
Hard Peel	Peelable seal with higher opening force.	Products requiring stronger distribution security with later manual opening.
Easy Peel	Controlled consumer opening with reduced film shredding, tray deformation, or residue.	Produce, salads, dairy, desserts, ready meals, meat, seafood, and food-to-go packaging.

Critical Coating and Seal Parameters

Parameter	Why It Matters	Recommended Control
Coating Weight	Influences seal strength, peel behaviour, coverage, cost, and consistency.	Define target and tolerance using the approved coating grade.
Coating Adhesion	Poor anchorage can cause coating transfer, delamination, or inconsistent peeling.	Test tape adhesion, bond integrity, ageing, and post-seal performance.
Seal Initiation Temperature	Determines the lowest practical temperature for an acceptable seal.	Define using the actual tray, dwell time, pressure, and test method.
Sealing Window	A wide window supports stable commercial production as conditions fluctuate.	Establish lower and upper temperature limits at commercial line speed.
Seal Strength or Peel Force	Controls package integrity and consumer opening.	Specify specimen width, angle, speed, conditioning, and acceptable range.
Coefficient of Friction	Affects unwinding, web tracking, cutting, and machine transport.	Set inside and outside COF targets where required.
Blocking Resistance	Coated surfaces must unwind without sticking or transferring.	Validate after storage under expected temperature and winding pressure.
Surface Energy	Influences print, adhesive, and coating adhesion.	Confirm treatment level at production and after storage.

Anti-Fog, Barrier, and Thermal Options

Optional Function	What It Provides	Important Limitation
Anti-Fog	Improves visibility by spreading condensed moisture into a more transparent layer.	Does not eliminate moisture; performance depends on temperature, humidity, orientation, and duration.
High Barrier	Adds defined oxygen, moisture, or aroma protection using EVOH or another barrier structure.	Standard coated BOPET should not be described as high barrier without measured OTR and WVTR.
Microwave Grade	Supports specified microwave reheating with a qualified tray and package design.	Requires validation of film, coating, ink, tray, food, venting, power, and time.
Ovenable Grade	Supports specified conventional-oven use, commonly with qualified CPET or aluminium systems.	The current standard grade is listed as non-ovenable.
Freezer Grade	Maintains seal and mechanical performance at the specified low temperature.	The current standard grade is listed as non-freezer; low-temperature testing is required.

Production-Line and Tray-Sealer Compatibility

Provide the tray-sealer brand and model, film width, core inside diameter, maximum outer diameter, roll weight, winding direction, coating side, seal-side orientation, eye-mark sensor, tooling layout, commercial line speed, sealing temperature, pressure, and dwell time.

Line trials should evaluate web tracking, tension, cutting, coating transfer, blocking, seal initiation, seal continuity, peel force, film shredding, leakage, flange contamination, print registration, anti-fog performance, and consistency across every tooling cavity.

Common Problems and Corrective Actions

Problem	Possible Cause	Recommended Check
Film Does Not Seal	Incorrect coating grade, low temperature, insufficient pressure or dwell, or incompatible tray surface.	Confirm tray chemistry, coating code, coated side, and sealing window.
Seal Is Too Strong	Excessive heat, excessive coating interaction, long dwell time, or wrong peel grade.	Reduce thermal input and select the correct peel coating.
Film Shreds During Peeling	High peel force, unsuitable base-film stiffness, weak coating anchorage, or poor peel-tab geometry.	Review coating, film gauge, bond strength, peel angle, and tray design.
Coating Transfers to the Tray	Insufficient coating adhesion, excessive sealing conditions, incomplete cure, or incompatible chemistry.	Check coating anchorage, storage, ageing, and application conditions.
Roll Blocks During Unwinding	Excessive storage heat, high winding pressure, insufficient cure, or unsuitable slip.	Review storage, winding hardness, coating cure, and COF.
Seal Leaks Through Contamination	Food particles, oil, moisture, sauce, damaged flange, or uneven tooling.	Run contaminated-seal, vacuum, pressure-decay, dye, or bubble tests.

Applications of BOPET Coated Lidding Film

Fresh fruits, berries, vegetables, and prepared salads
Chilled ready meals and food-to-go products
Fresh meat, poultry, seafood, and processed protein
Dairy products, yogurt, desserts, butter, cheese, and dips
Bakery products, confectionery, jelly, snacks, and portion packs
APET, rPET, PETG, CPET, PP, PE, and PS trays using the corresponding coated grade
Private-label packs requiring custom printing, barcodes, or transparent windows
Perforated produce packs requiring moisture and respiration control
Tamper-evident lock-seal or consumer-friendly easy-peel packaging

Explore HSQY's PET tray sealing film category, lidding film range, and tray sealing film solutions.

Information Required for an Accurate Quotation

Tray material, supplier, product code, layer structure, drawing, or physical sample
Tray dimensions, flange width, peel tab, compartments, and fill weight
Required lock seal, hard peel, easy peel, or universal seal behaviour
Food type, filling temperature, oil, moisture, powder, sauce, and contamination risks
Storage temperature, distribution conditions, target shelf life, and retail display requirements
Need for anti-fog, high barrier, MAP, perforation, printing, freezer, microwave, or oven performance
Tray-sealing machine brand, model, tooling layout, commercial speed, pressure, temperature, and dwell time
Film thickness, width, length, core ID, maximum outer diameter, roll weight, and winding direction
Coating side, seal side, print orientation, eye-mark position, and print repeat
Target seal strength or peel-force range and the required test method
Required food-contact, migration, quality, barrier, coating, and destination-market documents
Trial quantity, annual volume, delivery destination, and requested launch date

Request Coated BOPET Film Samples and Pricing

Customization Services

Custom 0.052–0.09mm thickness and tolerance
Custom 150–900mm roll widths
Custom roll length, core, roll weight, maximum outer diameter, and winding direction
PET-, CPET-, PP-, PE-, PS-, or multi-substrate-compatible coatings
Lock-seal, hard-peel, easy-peel, and application-specific coating grades
Anti-fog, high-barrier, MAP, low-temperature, microwave, and ovenable development
Flexographic or gravure printing for branding, instructions, and traceability
Custom eye marks, print repeats, transparent windows, coding areas, microperforation, and macro perforation
Tray compatibility, seal-window, peel-force, coating adhesion, blocking, leak, and production-line trials
Custom cartons, roll labels, pallet marks, and international delivery

Production Images for BOPET Coated Lidding Film

BOPET coated lidding film production line Production Line

BOPET coated lidding film roll Film Roll

BOPET coated lidding film export packaging Packaging

Packaging and Delivery Options

Packaging Item	Standard Arrangement	Customization
Sample Packaging	Small trial rolls protected in PE bags and cartons.	Label with coating grade, tray substrate, seal side, and winding direction.
Roll Packaging	Rolls wrapped in PE film and packed in suitable cartons.	Custom cartons, labels, core plugs, moisture protection, and edge protection.
Pallet Packaging	Approximately 500–2000kg per plywood pallet.	Pallet weight and stacking according to roll size and transport limits.
Container Loading	Loading optimized for 20ft or 40ft containers.	Loading plan according to roll dimensions, pallet size, and destination.
Delivery Terms	FOB, CIF, EXW, and DDU.	Other terms subject to commercial agreement.
Lead Time	Generally 10–15 days after deposit and specification approval.	Custom coating, printing, perforation, or special grades may require additional time.

Quality and Compliance Documentation

HSQY can provide available quality-management, inspection, and material documentation for the approved coated grade. Buyers should request the technical data sheet, certificate of analysis, food-contact declaration, migration or compliance reports, coating specification, seal-strength or peel-force method, and roll inspection criteria.

ISO 9001 is a quality-management-system certification and should not be presented as product-specific food-contact approval. FDA, SGS, RoHS, or other compliance statements should identify the exact film grade, coating chemistry, report number, food type, temperature, duration, and intended conditions of use.

Quality and compliance documentation for BOPET coated lidding film

Global Exhibitions

2017 Shanghai Exhibition

2018 Shanghai Exhibition

2023 Saudi Exhibition

2023 American Exhibition

2024 Australian Exhibition

2024 American Exhibition

2024 Mexico Exhibition

2024 Paris Exhibition

Frequently Asked Questions About BOPET Coated Lidding Film

What is BOPET coated lidding film?

It is a biaxially oriented PET film with a functional heat-seal coating designed to seal or peel from a qualified tray surface.

How is coated BOPET different from BOPET/PE laminated film?

Coated BOPET obtains its sealing function from a surface coating, while BOPET/PE uses a separate PE-based sealing layer laminated to the BOPET substrate.

Can one coated film seal APET, CPET, PP, PE, and PS trays?

Not necessarily. Multi-substrate sealing requires a specifically engineered universal coating. Many projects use separate substrate-specific grades.

Can BOPET coated film provide both lock seal and easy peel?

Yes, but these are different coating grades. Lock seal prioritizes permanent closure, while easy peel is formulated for controlled consumer opening.

What determines the peel force?

Tray resin, coating chemistry, coating weight, sealing temperature, pressure, dwell time, storage conditions, film gauge, and peel-test method all affect peel force.

Is anti-fog available?

Yes. Anti-fog can be incorporated into a suitable coated grade for chilled foods, but the anti-fog side and test conditions must be defined.

Is the standard coated BOPET film high barrier?

Not automatically. High-barrier performance requires a defined barrier layer or coating and measured OTR and WVTR values.

Can the standard film be used in a microwave or oven?

No. The current standard page specification lists the film as non-microwaveable and non-ovenable. A separately qualified thermal grade is required.

Can coated BOPET seal CPET trays?

A CPET-compatible coating can seal qualified CPET trays. If the package is heated with the lid attached, the complete thermal cycle must also be validated.

Why does the coating transfer to the tray?

Possible causes include poor coating anchorage, excessive sealing temperature, incomplete cure, incompatible tray chemistry, ageing, or incorrect storage.

Why does the film shred during peeling?

Common causes include excessive peel force, unsuitable film stiffness, poor coating anchorage, an incompatible tray, or inadequate peel-tab design.

Can BOPET coated film be custom printed?

Yes. Printing can include branding, product information, instructions, barcodes, QR codes, date-code areas, and transparent windows.

What sizes are available?

The current page lists 0.052–0.09mm thickness, standard widths of 180mm, 320mm, 400mm, and 640mm, a custom width range of 150–900mm, and 500m standard roll length.

What is the minimum order quantity?

The current stated MOQ is 1000kg. Trial quantity depends on coating grade, available stock, width, printing, and conversion requirements.

Can I request samples before bulk production?

Yes, subject to material availability and specification. Provide the tray sample, machine details, food application, seal type, film dimensions, and operating conditions.

About HSQY Plastic Group

HSQY Plastic Group supplies coated BOPET lidding films, PET/PE and PET/EVOH/PE films, BOPET/CPP films, CPET and PET trays, PP food trays, plastic sheets, and related food-packaging products for international B2B customers.

The team can support coating-grade selection, tray compatibility, seal and peel development, anti-fog and barrier requirements, roll conversion, printing, perforation, samples, production-line trials, quality documentation, export packing, and international delivery.

Contact HSQY for BOPET Coated Lidding Film