Poly Mailers and Courier Bags
Poly Mailers and Courier Bags
Mailing Bag for Express Service
A mailing bag for express service is a HDPE or LDPE poly mailer, also called courier bag, poly envelope or shipping bag, closed with hot-melt self seal adhesive and heat-seal welded edges.
Product Overview
A mailing bag for express service is a HDPE or LDPE poly mailer, also called courier bag, poly envelope or shipping bag, closed with hot-melt self seal adhesive and heat-seal welded edges. It is moisture-proof, waterproof, transparent and clear, made in 1.2 mil to 4.0 mil or 30 micron to 110 micron with custom-made thickness available. Sizes are customized to your ideas or design, and colours include white, grey, pink, blue, red, purple, green, yellow and orange with custom printing strictly followed for mailing, shipping and packaging.
Key Benefits
- Ships express parcels in a waterproof envelope that keeps rain and moisture off contents
- Closes with hot-melt self seal adhesive so packing lines skip tape and heat equipment
- Heat-seal welded edges hold the bag together through sorting and long distance transport
- Thickness from 30 micron to 110 micron lets you match film weight to parcel weight
- Nine stock colours plus custom printing separate carriers routes or priority levels visually
- Customized sizes follow your product dimensions so void fill and postage volume stay down
Problems It Solves
- Rain and damp handling soak paper envelopes while waterproof film keeps contents dry
- Tape sealing slows packing lines while hot-melt self seal closes each bag without extra tools
- Fixed carton sizes waste postage while customized sizes follow your product dimensions exactly
- Weak side seams split in transit while heat-seal welding keeps mailing bag edges closed
- Plain bags hide routing marks while white grey pink blue and custom print identify contents
Who It Is For
- Online sellers and fulfilment houses shipping express parcels daily through courier networks
- Mail and express operators needing waterproof shipping bags in custom sizes and colours
- Importers and distributors packing mailing shipping and packaging applications in volume
- Brands wanting their courier bag printed to design for recognition during last mile delivery
Application
Where This Format Is Used
- E-commerce fulfilment centres bagging apparel orders for express courier pickup and delivery
- Mail services sending documents and catalogues in clear transparent envelopes for easy identification
- Distributors shipping non-fragile accessories where a waterproof poly envelope replaces a box
- Export packers consolidating mixed parcels that need moisture-proof outer bags for sea transit
- Warehouses packing returns and exchanges in self seal courier bags for fast handling
Construction
Technical Features
- HDPE or LDPE film construction with customer specified film available on request
- Film thickness from 1.2 mil to 4.0 mil equivalent to 30 micron to 110 micron
- Self seal closure with hot-melt strong adhesive for peel and press sealing
- Heat-seal welded edge seal for continuous closure along the bag sides
- Moisture-proof and waterproof performance with transparent and clear film options
- Colour base in white grey pink blue red purple green yellow orange with custom printing
Data
Specifications
Figures below are the documented values for this format. Anything not listed is made to your drawing.
| Name | Mailing bags, poly mailer, poly envelope, courier bags |
|---|---|
| Material | HDPE / LDPE / As Per Customer Request |
| Thickness | 1.2 Mil to 4.0 Mil / 30 Micron to 110 Micron / Custom-Made |
| Feature | Moisture-proof, Waterproof, transparent, clear |
| Closure | Self seal with hot-melt strong adhesive |
| Color | White / Grey / Pink / Blue / Red / Purple / Green / Yellow / Orange, custom printing design will be strictly followed |
| Size | Customized size, follow client's ideas or design |
| Edge seal | Heat-seal welding |
| Application | Mailing, shipping and packagings |
Materials
- HDPE film option for mailing bags poly mailers and courier bags as specified
- LDPE film option for mailing bags poly mailers and courier bags as specified
- Customer requested film grade where the application needs material outside HDPE or LDPE
Customisation
- Customized bag sizes made to follow your ideas or design drawings exactly
- Film thickness custom-made across 1.2 mil to 4.0 mil or 30 micron to 110 micron
- Base colours in white grey pink blue red purple green yellow orange for sorting
- Custom printing design strictly followed to place your graphics on the mailer
In the Factory
How This Format Is Made
Control
Quality Checks on This Run
Trade Offs
Compared With the Alternatives
| Paper mail envelope | Poly mailers resist water and moisture where paper tears but paper suits documents needing writing surface |
|---|---|
| Corrugated box | Mailing bags cut postage and storage volume for soft goods but boxes protect rigid or fragile items better |
| Flat poly bag without adhesive | Self seal with hot-melt adhesive closes without tape or equipment but flat bags need separate sealing step |
Before You Order
Use Guide
- Confirm bag width and length from your largest parcel before requesting a quote
- Select HDPE LDPE or your specified film and thickness between 30 micron and 110 micron
- Choose a stock colour or send custom printing design to be strictly followed in production
- Check that hot-melt self seal closure fits your packing table workflow and storage conditions
- State mailing shipping and packaging use so heat-seal welding and film weight are matched
Answers
Mailing Bag for Express Service — Buyer Questions
What materials can you use for the mailing bag?
HDPE or LDPE, or film as per your request. Tell us the material when you enquire.
What thickness range do you offer?
From 1.2 mil to 4.0 mil, which is 30 micron to 110 micron, with custom-made thickness available.
Can you make custom sizes?
Yes. Sizes are customized and follow your ideas or design. Send width and length for quotation.
What colours and printing are available?
White, grey, pink, blue, red, purple, green, yellow and orange, with custom printing design strictly followed.
How does the bag close?
Each bag has self seal closure with hot-melt strong adhesive for peel and press closing without tape.
How are the bag edges sealed?
Edges are closed by heat-seal welding, and the film is moisture-proof, waterproof, transparent and clear.
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Background Reading
Guides Behind This Format
Aluminum Foil Film Application
BOPE Film
Quote Mailing Bag for Express Service to Your Drawing
Send the size or fill volume, film structure, print colour count, quantity and destination port and we will price it properly.