Every e-commerce parcel that arrives in a self-sealing courier bag depends on a strip of pressure sensitive adhesive: coated on the bag's flap, protected by a release liner in storage, and expected to form an instant, permanent, tamper-evident seal the moment the flap is pressed down. The manufacturer's express bag group is documented across multiple listings — PE courier bag sealing, bubble mailer bags, envelope sealing and e-commerce packaging among them — and it is a clean example of a single-property product: the seal must grab the bag film immediately and then tear fibres or distort film rather than release.
The production side has its own demands. Bag makers coat or apply the adhesive at speed onto PE film — a low-energy surface that resists wetting — and the adhesive must anchor to that film through bag storage, transport and warehouse heat without blocking (sticking to the liner or itself where it should not) or losing its closing aggression. A seal that works in the factory in spring and fails in a hot container in summer is a specification failure, not bad luck, which is why the grade discussion for express bags always includes the storage and shipping climate.
Documented Express Bag Territory
- PE courier bags — the group's core listing territory: sealing adhesive for courier bag production.
- Bubble mailers — documented listings for bubble mailing bag adhesive.
- Envelopes — documented envelope sealing glue listings.
- E-commerce packaging — the group's stated application frame across its listings.
The group's listings are organised by bag type rather than by one shared specification, so there is no single parameter table for the group: the grade for your bag film, strip width and line is confirmed in the quotation and proven with samples sealed, stored and torn under your conditions. That trial — seal a production bag, age it, tear it — is worth more than any number a catalogue could print.
How to Specify This Adhesive
A useful enquiry names five things: the substrate or material being bonded, the application method and equipment, the coat weight in grams per square metre where it is known, the temperature the bond must withstand in service, and the test standard your customer applies. Those five points are the same starting points the manufacturer's own customisation process uses when it opens a new formulation brief, and they let the laboratory match an existing grade before anyone talks about developing a new one.
If you are replacing an adhesive already in production, send its current grade name or a sample description — viscosity behaviour, colour and the failure you are trying to fix (edge lifting, ooze, stringing, cold failure) narrow the choice faster than a catalogue number. Samples are part of the documented route: free samples are listed on many product pages, and the freight arrangement for your sample is confirmed in the reply.
Supply, Packing and Samples
The documented minimum order on product listings is 1,000 kg, consistent with the 1-tonne minimum stated in the manufacturer's published frequently asked questions, and the documented production cycle is 7–15 days. Packing follows the listing for the grade — film-wrapped blocks are the standard form, with carton packing stated per product — and can be confirmed against your handling requirements in the quotation. Nothing on this page promises a grade's availability before the quotation confirms it for your specification.
What seal behaviour should I expect?
The design intent of this group is a permanent seal: pressed closed, the flap should resist opening and show tampering. The achieved behaviour is proven on your film with a sample, aged under your storage conditions.
Does it anchor to PE film?
PE courier film is the group's documented core application. Anchorage to your specific film — including any corona treatment — is confirmed in the sample trial.
Bubble mailers as well as flat bags?
Documented listings cover bubble mailer bags alongside flat courier bags and envelopes.
Send the application, substrate, application method and the quantity you need — the grade, sample route and price are confirmed per product in the written quotation.
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