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Sachet (4 Side Seal) — packaging format from CosunPack
CS-0150

Sachet (4 Side Seal)

Sachet (4 Side Seal): Flexible packaging with film, print, and sealing options matched to your filling process. Barrier and closure performance are agreed against your product requirements.

Product Highlights

  • Single-use sachet for samples and trial sizes
  • High-barrier laminates protect against oxygen, moisture, and light
  • Format library: stand-up, flat bottom, side gusset, spout, stick pack
  • Functional add-ons: zippers, valves, spouts, tear notches, tin ties
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Craftsmanship & Production

Production steps and quality checks for this packaging format, coordinated across our printing workshops and specialized production network.

Printed by gravure or digital, laminated for barrier, then bag-converted with zippers, spouts, and valves inserted where the format calls for them—seal strength and handling checks follow the agreed quality plan.

Customization Options

Review the available options for Sachet (4 Side Seal) with our team. These are the requirements to confirm:

  • Laminate structure
  • Size & format
  • Gravure / digital print
  • Closures & fittings (zipper / spout / valve)
  • Eco mono-PE paths

Specification Planning — Sachet (4 Side Seal)

Review these material and process options for the selected structure. Your quotation confirms the exact specification for your project.

MaterialPET/PE, PET/AL/PE, kraft laminates, or mono-PE options; suitability confirmed per project
StructureSachet (4 Side Seal)
Size RangeDimensions or capacity confirmed against your product and selected tooling
ThicknessMaterial thickness or weight confirmed in the approved specification
PrintingGravure up to 10 colors, digital for short runs
FinishingMatte/gloss/spot finish, zipper, spout, degassing valve, tear notch
MOQQuoted per material, structure, print process, and order quantity
Sampling Lead TimeConfirmed after the artwork, structure, and tooling review
Production Lead TimeConfirmed after sample approval and production planning
Typical ApplicationsCoffee, snacks, pet food, liquids, powders

Options shown for planning; final parameters are agreed in writing with your quotation and approved sample.

Before You Order

Sachet (4 Side Seal) FAQ

Practical answers on choosing the structure, avoiding common problems, and confirming the right specification for your product.

How does a four-side-seal sachet affect usable panel area?

Allow for seal borders on all sides and mark them on the artwork drawing. Review a filled sample for readable text and panel bulging. Tiny fonts or codes near the crimp may become difficult to read even when the flat artwork seems spacious.

Technical references
What information does a sachet forming line require?

Send the machine model, web layout, forming arrangement, repeat, unwind direction and roll limits. Confirm how paired films or folded webs meet at the seals. Trial registration and cutting positions with the selected film rather than treating a premade sachet size as the complete line specification.

Technical references
How can we avoid a leaking corner at intersecting seals?

Run filled trials under the intended closing conditions and inspect corners as well as straight seal sections. Include product splash or powder contamination representative of the process. Agree leak-detection and seal acceptance methods with the packing team before setting the operating window.

Technical references
Can a four-side-seal sachet be resealable?

The perimeter-sealed sachet normally describes the initial enclosure, not a proven repeat closure. If repeat use is needed, specify a separate reclosure concept and evaluate it with the contents. Check dispensing and storage after opening instead of assuming a folded sachet restores its original barrier.

Technical references

Have a different application? Share your requirements for this model.

One Partner for Your Complete Packaging

Source packaging from China with one team, from product-led development to delivery. Share your product or idea, component list, quantity, and destination—we will help define the next steps.

Project-specific quotationNDA available before file sharingReply target: one business day