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Coated paper

Can a Heat Sealer Close Coated Paper Bags?

Do not select a heat sealer from the word “paper”. Test coated or lined paper only after confirming that the facing layers are intended to heat-bond. Uncoated kraft should not be presented as compatible with a standard heat sealer.

FABLE ·

FABLE FDR handheld jaws for material trials
FABLE FDR handheld jaws for material trials. Product photo by FABLE.

Ask for the inner coating, not the outside finish

An outside kraft texture, printed finish or milk-powder application does not establish the closure mechanism. Ask the supplier whether the two inside surfaces form a thermal seal and request its recommended trial conditions. Some bags need an adhesive strip, stitch or another closure rather than heat bonding.

Shortlist only after the material is identified

For a verified heat-sealable lining on a manageable flat mouth, compare FDR and FKR by their band width, usable jaw length and handling. The paper laminate may crease or delaminate before a useful bond is formed, so a model recommendation without a sample remains provisional.

Inspect the inside and outside after cooling

Open a cooled trial seam to distinguish a bonded lining from paper that merely looks pressed flat. Check for scorch, coating transfer and separation of laminate layers. Use the intended filled package and its application requirements before accepting the process. This is a selection guide, not a claim of food-contact approval.

  • • Coating or liner specification
  • • Bag mouth width and number of layers at side folds
  • • Appearance and bond criteria after cooling

FABLE models to compare

FDR Series · Handheld Jaw Sealers · Specification sheet (PDF)

FKR Series · Handheld Heat Sealers · Specification sheet (PDF)

Technical references

Machine dimensions and formats refer to FABLE specifications. These references describe testing principles, not certification of any FABLE machine or packaging process.

ASTM F2029 · Laboratory heat sealability

ASTM F88/F88M · Seal strength

Related sealing guides

Choosing a Heat Sealer for Foil Laminate Bags

Heat Sealing Gusseted Bags and Thick Fold Transitions

How to Test a Bag Seal Before Ordering a Machine

Discuss your bag and application

Send the material, seam dimensions, expected quantity and destination power supply so we can review the shortlist with you.

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