Courier bags, also known as poly mailers or courier satchels, are flexible bags, typically made of polyethylene, designed for shipping and protecting items during transit. They are popular for their ease of use, durability, and cost-effectiveness compared to traditional boxes.
Here's a breakdown of common features and descriptions:
Material and construction
Polyethylene (PE) or Low-Density Polyethylene (LDPE): A commonly used plastic material that provides excellent resistance against water and tearing, making it suitable for non-fragile items. Self Adhesive Poly Bags are also often made from LDPE, and may have two layers (black on the inside, white on the outside) to prevent contents from being seen.
Kraft Paper: An eco-friendly option that's strong and recyclable/biodegradable.
Various Layers/Thicknesses: Available in different thicknesses (e.g., 51, 60, or 80 microns) to suit varying protection needs.
Security features
Tamper-Proof Design: Often feature a self-adhesive, permanent seal that cannot be opened without tearing or damaging the bag, providing evidence of tampering.
Double Serrated Side Seal: May prevent unauthorized cutting and resealing from the sides.
Optional Features: Include alphanumeric barcodes, serial numbers, perforations for tear-off receipts, and void marking tape closures for enhanced security.
Convenience and efficiency
Self-Adhesive Flap: Allows for quick and easy sealing without the need for additional tape.
Lightweight: Reduces shipping costs compared to heavier packaging options like boxes.
POD Jacket (Proof of Delivery): A transparent pocket on the back of the bag for holding invoices, waybills, and address details, eliminating the need to attach them separately.
Ease of Writing On: LDPE / LLDPE Co-Extruded Multilayer film allows for easy writing with a ballpoint pen or permanent marker.
Customization and branding
Custom Printing: Can be printed with logos, branding, or designs to enhance professionalism and marketing efforts.
Specialized types
Bubble Courier Bags: Include a layer of bubble wrap for added protection of fragile items.
Gusseted Bags: Feature expandable sides or bottom folds for bulkier items.
Biodegradable or Eco-Friendly Bags: Made from materials like corn starch or plant-based items to reduce environmental impact.
Sizes
Available in a wide range of standard sizes from small (e.g., 8x10 inches) for documents and small items to extra-large (e.g., 24x24 inches) for bulky goods.
In summary, courier bags offer a secure, convenient, and cost-effective packaging solution for various items, with options for enhanced protection, branding, and environmental responsibility.
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