Layers can be joined with hot-melt adhesive, by thermal calendering, by ultrasonic bonding or by extrusion coating molten polymer onto the fabric. Laminates combine properties no single layer offers, such as a liquid-proof breathable film with a soft fabric face for diaper backsheets. Peel strength between layers is the main quality test.
Heard on the job
Lamination peel is under 1 newton at the edges, so the glue pattern is too narrow.
Also heard as
- laminating
- laminate
Related terms
Backsheet
Outer, liquid-proof layer of a diaper or pad, usually breathable film laminated to a soft nonwoven.
Delamination
Separation of the layers of a laminate or multilayer nonwoven, such as an SMS or a film composite.
Ultrasonic bonding
Bonding or laminating by vibrating a horn at ultrasonic frequency against a patterned anvil roll to melt fibers locally.