Sealed Mylar Bags.

The film runs continuous around the contents with a heat seal across the top and no zipper track built in. There is no mechanical closure to leak, so the barrier is hermetic from filling until the customer tears it open. It suits products used in one go or decanted into another container.

Where a reseal is still wanted, the zipper goes below the tamper seal. That way the seal is destroyed on first opening and the zipper stays intact underneath for everyday reclosing.

Because a seal below the zipper proves nothing: the bag can be opened and reclosed from the top and the strip stays intact. Placed above, the strip has to be torn away to reach the contents, and a torn strip cannot be put back.

We treat this as a fixed rule on the dieline. A tear notch sits above the seal to start the tear, and a perforated line across the strip guides it straight so the bag opens cleanly instead of raggedly.

The LLDPE sealant layer on the inside of the laminate is fused to itself across the full width of the bag by a heated jaw. That fusion is the working part of the bag. The barrier layers behind it, metallised or foil, decide how long the contents stay protected, but the sealant is what closes the pack.

We prove the seal with product in the bag, since a seam that holds empty can fail with a dusting of contents caught in it. The heat-sealed top also happens to be a stronger barrier than any zipper.

Yes, and it is one of the cheaper finishing details that does real work. Copy along the seal strip, something like the words sealed for freshness, reads as reassurance at the shelf and disappears once the customer opens the pack.

Beyond the strip, matte lamination is the most requested finish and it shows a broken seal clearly. Gloss gives higher colour impact. Soft-touch is there for premium supplement and cannabis lines, and a clear window can sit below the sealed area where visibility helps.

Flat width by length, measured over the outside of the seals, with 4 x 6, 6 x 9 and 8 x 12 inches the common retail sizes. The seal band and any zipper below it take up the top of the bag, so fill height is less than the overall figure.

Headspace matters more here than on an open pouch, because the tamper seal is made after filling. Product in the seal area is the usual reason a sealed bag fails, and free film above the fill is the fix.

Sealed pouches start at 500 pieces, with or without a zipper below the seal. A child-resistant zipper or a perforated tear line adds per-unit cost and leaves the minimum where it is. The price tiers down past 1,000 pieces.

Orders run to 100,000 on the same construction. Regulated categories tend to start at the minimum while the compliance panel is signed off, then reorder in bulk once the artwork is fixed.

Standard turnaround is 7 to 10 business days, rush is 5 to 7 business days, and samples arrive in 5 to 7 business days. The sample cost is credited back on the production order.

Seal a sample on your own equipment with the real product inside, then try to open it without tearing the strip. If you can, the seal placement is wrong and we fix it on the dieline. If you cannot, the pack is doing exactly what it should.

Hermetic until first open, which is better than any zipper can manage. A press-to-close track always passes a little air. A fused heat seal passes none, so the laminate's full barrier is delivered to the customer intact.

Structure follows the shelf life. The standard BOPP, metallised PET and LLDPE laminate covers most products. Where freshness depends on it, a PET, aluminium foil and PE laminate gives full opacity and the highest oxygen barrier behind the seal.