Our kraft paper bubble flat bag is a practical, eco-friendly packaging solution that combines the cushioning protection of bubble film with the strength and sustainability of kraft paper in a flat, three-side-sealed format. Designed for manufacturers, distributors, and e-commerce businesses across Southeast Asia who need lightweight protective packaging for flat or thin items — including documents, printed materials, PCBs, panels, and flat industrial components.
The flat bag format maximizes packaging efficiency for items that do not require the volume of a gusseted or stand-up bag. Three factory-sealed sides and one open end allow fast loading on production lines, and the heat-sealable open end creates a secure closure after loading. The result is a compact, well-protected package with minimal material waste.
What Is a Kraft Paper Bubble Flat Bag?
A kraft paper bubble flat bag is a flat-format packaging pouch with three factory-sealed sides, manufactured from laminated kraft paper and bubble film. The kraft paper outer layer provides structural strength and puncture resistance, while the inner bubble film layer cushions the contents against impact, compression, and abrasion during shipping and handling.
The flat format is specifically suited for items where height (thickness) is minimal relative to length and width — making it the most efficient packaging format for PCBs, flat panel components, documents, artwork, and similar items.
Key Features
Flat Three-side Seal Construction
Three sides are factory-sealed, with one open end for product loading. After loading, the open end can be heat-sealed, folded and taped, or left open depending on application requirements. The flat format minimizes packaging material and reduces shipment volume compared to gusseted alternatives.
Kraft Paper Outer Layer
The kraft paper outer surface provides structural rigidity, puncture resistance, and an eco-friendly appearance. The natural brown kraft surface communicates sustainability credentials that matter to customers and compliance teams across ASEAN markets with developing EPR frameworks.
Inner Bubble Cushioning
The inner bubble film layer absorbs and dissipates impact energy during transit, protecting flat items from compression, abrasion, and vibration damage. Available in standard and large-bubble specifications to match the protection requirements of the packaged item.
Efficient Storage and Handling
Flat bags stack efficiently in warehouse storage, reducing storage space requirements compared to pre-formed mailers. The flat format also allows faster loading on production lines — particularly for flat items that slide easily into the open end.
Eco-friendly Construction
Kraft paper and PE bubble film are both recyclable materials. The flat format minimizes material use per unit packaged, reducing both material cost and environmental impact per shipment.
Custom Sizes Available
All dimensions custom manufactured to match your specific product dimensions. Small batch orders welcome.
Applications
PCB and Flat Panel Packaging
Printed circuit boards, display panels, keyboard assemblies, and similar flat electronics components fit naturally into flat bag format — eliminating wasted space and reducing packaging time versus over-sized bags.
Document and Print Packaging
Technical documents, engineering drawings, printed materials, and artwork are protected from moisture and transit damage in kraft bubble flat bags while maintaining a professional presentation appearance.
Flat Industrial Components
Sheet metal parts, gaskets, flat optical components, and other thin industrial items benefit from the combination of kraft paper rigidity and bubble cushioning in a flat format that matches their geometry.
E-commerce Flat Product Shipping
Books, vinyl records, flat artwork, and similar consumer products ship efficiently in flat kraft bubble bags — providing adequate protection at minimum packaging weight and volume.
Specification Guide
Parameter
Standard Range
Kraft Paper Weight
70–100 GSM
Bubble Specification
Standard (10mm) or large (28mm)
Sealed Sides
3 factory-sealed, 1 open end
Closure Options
Open end, heat-sealable
Custom Sizes
Yes — all dimensions
Format
Flat (no gusset)
Frequently Asked Questions
Q: What is the maximum PCB size that can be packaged in flat bags?
Flat bags are custom manufactured to any dimension — there is no fixed maximum size. Specify your PCB dimensions and we manufacture the bag to match with appropriate clearance for easy loading.
Q: Can the open end be heat-sealed by the customer?
Yes. The inner PE bubble film layer is heat-sealable. Specify the heat-sealable open end option and the bag can be sealed using a standard impulse heat sealer after loading.
Q: Are gusseted versions available if needed?
Yes. If your flat components require more volume (for example, multiple stacked PCBs), gusseted versions with side panels are available. Contact us with your stacked dimension requirements.
Q: Are custom sizes available?
Yes. All dimensions are custom manufactured. Small batch orders welcome.
Contact Mavis for kraft paper bubble flat bag specifications: mavisv.com/contact
