Mailing and courier bags
Designed for postal or courier transport, mailing bags are light, waterproof and have an integral adhesive strip. Our stocked ranges cover economy and 'Tuff' mailers, mailorder and courier bags, tamper proof, bubble and even high impact metallic advertising mailers.
Need mailing bags?
For a range of high quality mail order bags, mailing envelopes, and all types of courier sacks please visit mailing bags and courier bags at www.mailingbags.co.uk, where you can buy online securely at discount prices.
Mail order bags are produced with a high quality film, designed to be lightweight but tuff. It offers excellent levels of resistance along with excellent opacity in order to keep your product safe, secure and dry through the harshest of delivery systems.
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Postal bags need the proper balance of toughness and light weight, because they are expected to keep safe products while still moving quickly through packing, sorting, and dispatch. A decent polythene suppliers bag can cope with conveyor snags, pallet straps, and the rough handling that comes with a busy distribution area, nevertheless only if the gauge and seal are suited to the job. If the film is also thin, seams split and the bag stretches out of shape; if it is above-specified, packing becomes wasteful and awkward. Good bag selection retains the line moving and avoids avoidable rework.
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Courier bags need to do above simply close around a package, because the proper film spec can keep safe stock, retain handling tidy and avoid wasted weight in despatch. A well-manufactured bag uses a sensible gauge and a robust seal so it resists punctures without adding dead mass that drags down pallet yield or pushes up transport fill. On a busy packing line, that small contrast matters, since weak film can split in cages or amid tote movement, while above-heavy material adds cost with no proper earn. The optimal selection is the one that balances strength, closure security and efficient use of space.
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Mailing bags have to be light enough for mailing rating nevertheless tough enough to survive the rough handling that comes with sorting belts, cage loading and hurried dispatch. A superb bag is not manufactured robust simply by making it thicker, because that only adds weight and cost without fixing weak points. Better conversion gives the film even gauge control and enough stretch to take knocks when strange-shaped products transport around inside. Seal quality matters only as much, since dust, static and a rushed handover at the bench can turn a tidy closing strip into a weak point. When the bag is chosen and sealed properly, there is less bursting, less rework and far less claims from damaged consignments.
Coloured mailers can make picking faster because the bag itself becomes a visual cue on the packing bench. A transparent colour scheme assists staff separate mixed orders, retains lookalike parcels off the gross trolley, and makes it easier to see which consignment is prepared to transport on. That only works when the film is specified properly, though. If the polythene suppliers is also light, it can stretch, split, or rub through at corners; if it is also heavy, it becomes stiff and awkward to pack. The colour assists only when the mailer still handles well on a busy shop floor.
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Plastic envelopes can be a sensible selection when printed material requirements to stay clean, dry, and easy to handle through dispatch. Thin enough to retain mailing costs down, they still offer enough protection for invoices, brochures, samples, or short-dash promotional packs that would be damaged by plain paper wrapping. The practical point is that the film gauge and seal quality have to match the weight and shape of the contents, otherwise the load slips, the seal splits, or the pack sees untidy on arrival. When the spec is proper, the result is tidy handling, less rework, and less complaints at the other stop.
Jiffy mailers earn their place by balancing protection with postage economics, and that balance has to be set properly from the beginning. A mailer that is also heavy or fat can tip a package into a dearer carriage band, while one that is also light may fail once it meets a sharp corner, a dropped tray or a rough sortation line. The better structures use controlled paper or polythene suppliers layers and the proper amount of cushioning, so the pack absorbs daily knocks without wasting material. That retains products safe, avoids unnecessary tare weight and assists finished packs transport through dispatch at a proper rate.
The Two Envelopes Problem
An envelope is a simple item, nevertheless the logic behind repeated swapping shows how quickly a small change can swing value in either direction. If the contents can double or halve each time, the result is not only a tidy one-off selection; it becomes a chain of reallocations where early earns can be wiped out by later losses, or vice versa. In packaging terms, that is a warning about handling decisions manufactured without checking the pattern behind them. A single strange consignment may see harmless, yet repeated adjustments in pack size, spec, or fill level can steadily transport the outcome away from the unique target. Good control stops a minor tolerance becoming a costly drift.
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Mailing sacks need to match the job in hand, because size and strength affect how well products travel through picking, packing, and dispatch. A bag that is also roomy leaves items moving about, which can lead to scuffing and awkward handling damage, while one that is also tight makes sealing harder and puts stress on the seam. For heavy-duty products, a well-chosen sack also assists speed up secondary packing, since staff can fill and close parcels without wasting time adjusting the contents. The proper gauge and format make the process smoother on the shop floor and reduce avoidable damage in transit.
Plastic envelopes are chosen because they give light, flexible protection without adding much postage weight. Clear polypropylene or polyethylene lets the contents be seen at a glance, while white film gives privacy where a discreet outer pack is needed. That mix of visibility, low gauge material and decent tear resistance makes them uniform for all sorts of mailing jobs that would be awkward in paper or also fat in board. They also fold and stack well in dispatch, which assists save space on the bench and in transit. When the proper film thickness is matched to the contents, handling damage drops and mailing costs stay sensible.
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Bubble mailing bags work optimal when small, fragile items need a bit of protection without the weight and bulk of a carton. Their proper strength lies in the method the outer film and bubble layer work together to cushion hard edges, corners and other items that bruise easily in transit. A bag that sees thick on the shelf is not always the optimal performer; seal quality, bubble integrity and the method the material copes with drops and rough sorting matter far more. On the packing bench, a bag that opens well and closes cleanly retains the line moving. That makes the proper specification a simple method to cut damage and limit avoidable returns.
Types of bags
Economy mailers
Our economy range for simple but effective protection - plain and coloured mailers plus the Mailite range with a pre-printed address window. The cheapest way to send literature to your customers and staff and much lighter than paper envelopes.
Discount mailing bags
For more information and a list of handy resources on mail-order envelope products such as plastic mailers and mailing bags, please visit the discount mailing bags website.
Heavy duty postal mailers
Heavy duty postal mailers are thicker opaque mailers in a strong co-extruded material where you need to be sure that the mailer can withstand some rough handling in transit.
Courier sacks
Massively popular range of large and very large courier sacks with double seals - get a sample to see the tough quality!
Security mailers
Security mailers are extra thick (360 gauge) white opaque mailers with a Tamper Evident Sealing Strip. The welds have a side skirt as well to give extra security to the package - for that top secret document!
Jiffy mailers
The standard featherpost 'jiffy style' mailers are paper padded envelope with a self seal strip for closure. This range is bubble lined rather than pulp filled so whilst being padded to protect contents they are also very light.
Paper feel plastic envelopes
A plastic envelope with the feel of paper (but much stronger and waterproof of course).
More on packaging?
At packagingknowledge.com you can find more information and articles on mailing bags and courier bags.
Visit our sister site for more on mailing bags
Mailing Bags specialist supplier of mailing bags, polythene mailers, courier bags and plastic envelopes. Offers discount ranges and high-impact ranges for all you mail-shot and postal packaging needs.
Get 20% off black mail order sacks this Christmas!
There's a fantastic festive offer waiting for you over at Polybags.co.uk, where you can get 20% off black high security mailing bags on all orders over £75. Black secure mail sacks are the perfect mailing bag for sending confidential documents. Their thick, opaque black polythene means you get confidentiality of contents and great bag strength for a sack that Santa could use for even his most secret presents! So shop now for your black mailing bags, making sure you apply the voucher XMASMAIL16 before you shop - this will automatically give you 20% off once you have £75 worth of black mail sacks in your shopping basket. There's strictly one voucher per customer and the offer is valid for a limited time only, so don't delay!
