What is the difference between waterproof and water-resistant airlaid?

Water-resistant resists penetration for a short exposure and will eventually let liquid through — a coated grade often sits here. Waterproof means the barrier holds for the full service life: a film-laminated grade with a hydrostatic head above 1,000 mm and no strike-through after 30 minutes under load.

Which film thickness should we choose?

15–20 µm LDPE covers most table linen; 20–25 µm for underpads and longer exposure. Thinner film saves cost but raises pinhole risk and reduces fold endurance — test at the crease, not on a flat sample.

Can the product be embossed after lamination?

Yes, on the paper face. Embossing a laminated sheet requires a controlled nip so the film is not damaged; deep patterns can thin the film at the crest and create leaks, so specify the pattern and ask for a hydrostatic test on the embossed area.

Is your waterproof airlaid food-contact safe?

The airlaid face is produced to FDA food-contact requirements and the laminating adhesive used for food grades is selected accordingly. Tell us at RFQ that the application is food contact — the film and adhesive combination is chosen differently from an underpad grade.

Can you supply slit rolls or finished sheets?

Both. Waterproof grades are supplied as jumbo rolls 60–1,400 mm wide or converted into table linen, bibs and underpads with your fold and print. Slitting is ±1 mm, and the film edge is trimmed to avoid exposed adhesive.

Waterproof Airlaid Paper: PE Lamination vs Coating

A waterproof airlaid is a laminated article: an absorbent airlaid face and a barrier layer that stops liquid reaching the table, the mattress or the patient. Almost every quality complaint in this category comes from the barrier, not the paper.

Waterproof airlaid table linen — Film-laminated airlaid table linen. The barrier is invisible in the finished product — and it is where failures show up.

Two production routes

PE film lamination

A cast or blown polyethylene film, typically 10–25 µm, is bonded to the airlaid with adhesive or by extrusion. This is the workhorse route: the barrier is absolute, the process is fast, and the property set is predictable. The trade-off is hand feel — a film makes the sheet stiffer and slightly plastic, and it does not breathe.

Direct coating (waterborne barrier)

An acrylic or bio-based dispersion is coated onto the back of the airlaid and dried. The result is softer, drapes like paper rather than like a laminate, and can be designed to be breathable. The barrier is good against short exposure but is not a guarantee against a two-hour soak, and coating weight control is the whole game.

Comparing the two

How to specify it so it does not fail

Specify the barrier by test result, not by description. “Waterproof” is a marketing word; a test method is a specification.

Test at the crease, not on the flat. A laminate that holds 1,500 mm on a flat sample will leak after five folds if the bond line is wrong.Specification note

Hydrostatic head — AATCC 127 or ISO 811. State the minimum, e.g. 800 mm for table linen, 1,500 mm for underpads.
Wet-through time — place the sheet over a white blotter, load 5 ml of coloured water, and record time to first strike-through. Anything under 30 minutes is not “waterproof” for a dinner service.
Peel strength — T-peel at 180°, measured dry and after a 30-minute soak. This is where cheap laminates fail.
Fold endurance — fold the same line five times, then repeat the hydrostatic test. Barrier failure at the crease is the most common field complaint.
Blocking — check that the roll does not stick to itself after a week under 40 °C warehouse conditions.

Failure modes and what causes them

Pinholes in the film. Usually a film quality or extrusion issue — visible as isolated wet spots, not a general leak.
Delamination at the fold. Insufficient adhesive coat weight, or adhesive that embrittles at low temperature. Ask for peel strength after cold storage if you ship in winter.
Curling. An unbalanced construction: the film shrinks slightly, the paper does not. A heavier airlaid face or a balancing back coat fixes it.
Edge wicking. Water travels along the cut edge between film and paper. A slightly wider film with a sealed edge, or a narrower trim, solves it.
Blocking in the reel. Wound too hot or stored too warm; the film embosses into the paper face.

Weight and cost in practice

A typical waterproof table linen is a 60–80 gsm airlaid with a 15–20 µm LDPE film, giving a total of roughly 90–120 gsm and a hydrostatic head well above 1,000 mm. Underpads usually run heavier — 100–120 gsm airlaid with 20–25 µm film — because they must survive a whole night rather than one meal. Expect the waterproof grade to cost materially more per tonne than the same airlaid uncoated; you are buying a second material and an extra process.

If cost is the constraint, the honest options are to reduce the film gauge, to use a coated grade where the exposure is short, or to accept a lighter airlaid face — not to buy a “waterproof” sheet that has never been tested at the fold.

Sustainability, stated plainly

A PE-laminated airlaid is not recyclable in a paper stream and not compostable — the film sees to that. A coated grade is closer to mono-material and is the better answer if your customers audit packaging and end-of-life claims. If neither works for your market, specify a thinner film and communicate the construction honestly rather than claiming compostability the product does not have.