Pack substrate
Tray material, bottom-web sealant, flange design, and contamination risk set the seal-layer requirement.
Lidding films and top web
Lidding films for clean seals, clear presentation, and controlled opening.
Nexus supplies lidding films for tray sealing and thermoforming packs where seal reliability, peel behavior, barrier performance, anti-fog clarity, and print quality must work together on the packing line.
Selection logic
Start with the sealing surface, opening requirement, and product sensitivity.
The correct top web depends on the tray or bottom film, sealant layer, pack format, MAP requirement, opening style, storage temperature, and whether the lid needs to be plain, printed, peelable, foil-based, or high barrier.
Opening style
Lock seal, easy peel, and stronger peel formats are chosen around the expected opening experience.
Product sensitivity
Oxygen, aroma, moisture, light exposure, and MAP gas retention decide the required barrier level.
Conversion route
Plain, printed, foil-based, or registered top webs need early planning around reel format and artwork.
Types of lidding film
Choose the top web by seal result, opening style, and barrier requirement.
These are the main lidding film families to compare first. The final structure should be confirmed against the tray or bottom web, sealing surface, product sensitivity, gas mix, storage condition, print requirement, and reel format.
For secure packs where seal strength is the priority.
Used when the pack needs a firm seal and a low risk of accidental opening during handling, storage, or distribution.
For packs that need clean opening without tearing.
Used for retail packs where the lid should release cleanly from the seal area without tearing the tray, bottom web, or lid.
For higher opacity, heat resistance, or stronger barrier performance.
Used for dairy cups, ready-to-eat formats, and products where light protection, aroma retention, puncture resistance, or heat treatment make foil relevant.
For packs where the lid carries brand and product communication.
Suitable when the lidding film carries brand graphics, product information, or shelf communication instead of relying on a separate label.
For MAP and oxygen-sensitive packs where shelf life drives selection.
Used when oxygen, aroma, moisture, or MAP gas retention is central to the commercial shelf-life target.
Performance priorities
What the top web must prove in production.
Once the lidding type is chosen, production trials should confirm the seal window, opening behavior, pack visibility, and barrier performance under real line and storage conditions.
Seal reliability
Stable sealing across the required temperature window, dwell time, and line speed.
Peel control
Opening force, peel noise, fibre tear, and seal appearance checked against the pack format.
Anti-fog and visibility
Clear product view in chilled packs where condensation can reduce shelf appeal.
Barrier selection
Oxygen, aroma, moisture, and MAP gas retention confirmed against the shelf-life brief.
Technical remarks
Top-web selection should be tested with the actual sealing surface and pack conditions.
Lidding film behavior can change with tray material, bottom-web sealant, seal temperature, contamination in the flange, pack geometry, gas mix, and storage temperature. Samples should be tested on the actual packing line before the commercial structure is locked.
Requirement checklist
Share these details before we recommend a lidding film.
Top-web selection becomes much faster when the sealing surface, opening requirement, and shelf-life target are clear from the first discussion.
Pack system
Thermoforming bottom web, preformed tray, cup, foil container, or another sealing format.
Seal requirement
Lock seal, easy peel, burst peel, high-barrier seal, or any known opening-force target.
Product and atmosphere
Product type, MAP gas mix if known, oxygen sensitivity, aroma needs, storage condition, and shelf life.
Print and reel details
Plain or printed film, reel width, repeat length, registration needs, and approximate monthly volume.
FAQ
Common questions before sending a lidding-film requirement.
Is lidding film the same as top web?
In thermoforming and tray-sealing discussions, lidding film and top web are often used for the non-forming film that seals over the pack. The exact structure depends on the sealing surface and pack format.
Should we choose lock seal or easy peel?
Lock seal is used when seal security is the priority. Easy peel is used when controlled opening matters for consumer convenience or retail presentation.
Can the lidding film be printed?
Yes. Printed lidding can be supplied when the top web needs brand graphics, product information, or shelf communication. Print planning should cover reel orientation and registration needs.
What information is needed for a quote?
Share the tray or bottom-web material, pack size, sealing surface, seal preference, product, MAP gas mix, storage condition, shelf-life target, print need, reel width, and expected quantity.
Request quote
Share your lidding-film requirement.
Nexus Corporation can review your tray or bottom web, seal preference, product sensitivity, MAP requirement, print expectation, and storage conditions before recommending a top web.
+91 98204 52598
sethi@nexus-corp.in
49, Marol Co-op Ind. Est., MV Road, Andheri (E), Mumbai 400059, India