BAG FORMAT
Flat bags.
Start with the use.
Individual parts and inner packs where the closure can be agreed around the packing process.
Concept illustration only — not a measured product or load-rating demonstration.
What to discuss
Confirm how the pack is closed. A flat format does not by itself specify heat sealing, tape, an adhesive flap or a hermetic seal.
- Bag width and length, or an existing sample
- Part edges, packed shape and units per bag
- How the bag will be filled and closed
- Film grade, thickness and print if specified
- Common materials discussed
- LDPE · LLDPE · PO (Polyolefin) · PP are discussed across projects; material structure and suitability for this bag format are confirmed per project.
- Dimensions & thickness
- Confirmed by project — no universal range is promised.
- Bring the artwork or reference for review.
- Sampling
- Available; scope, timing and costs agreed individually.
Where this format can fit
Flat bags suit a single part or inner pack when the filling and closing method is already understood. They can be a practical starting point for regular shapes, but the opening is not automatically a seal.
Packaging risks to review
- An open mouth can allow parts to escape unless the closure is defined.
- A bag that is too tight can stretch around edges.
- A bag that is too loose can allow movement and abrasion.
- Print placement can be obscured by folds or the closing area.
Questions to settle in the brief
- Bag width and length, or an existing sample
- Part edges, packed shape and units per bag
- How the bag will be filled and closed
- Film grade, thickness and print if specified
Sample checks before approval
A sample is useful only when it tests the real part and the intended handling method. Record what passed, what failed and what remains open.
- Measure the component in its packed arrangement, not only its bare outline.
- Test filling with the real part and the intended number of pieces.
- Confirm how the bag will be closed and reopened, if at all.
- Check print visibility after filling and closing.
Material, thickness and opening
LDPE, LLDPE, PO (polyolefin) and PP are discussed across projects. Their suitability for this format, the film structure and the usable opening are confirmed per project. Heat sealing, tape, adhesive flap or hermetic performance are not implied by the flat format. Confirm the exact closure and film per project.
Print and identification
Bring the artwork or a reference. Keep part number, quantity, batch or handling text in a layout that remains visible after filling. Print feasibility, color and approval method need factory review.
What remains a project decision
Dimensions, thickness, closure, print and performance are not fixed by the format name. Sampling is available; scope, timing and cost are agreed individually. Production timing and pricing remain subject to quotation.
How to brief this format
Start with the packed part: its largest outline, number of pieces and any edge or surface that must stay clear. Say how the pack is filled, closed, carried and opened. If a current bag is used, send its measured dimensions and identify what should stay the same; do not send only a product name.
For print, separate the information that must remain readable from decoration. Part number, quantity, handling notes and barcodes can have different space and contrast needs. At sample stage, check that the opening and closure still work after the label is applied, then keep the approved sample reference with the artwork version.
What a concept image cannot show
The illustration on this page explains the format; it is not a measured product, a material sample or a load test. Film thickness, seal condition and opening behavior need a physical sample with the real component. A successful fit does not establish transit protection, barrier performance or a production release.