splitlaag

Splitlaag, literally meaning "split layer" in Dutch, is a term used to describe a boundary within a multilayer material where a layer has separated or is at risk of separating from an adjacent layer. In practice, splitlaag often refers to delamination or delaminated interfaces in laminates, coatings, and composite structures, and can also denote intentional layer separation in certain engineered products.

The term appears across disciplines such as wood science, polymers, metals, and electronics packaging, where thin functional or protective layers are stacked. It is commonly used to describe problems rather than design features, with attention focused on when and why an interface fails.

Causes and mechanisms commonly associated with splitlaag include improper adhesion between layers, residual stresses from manufacturing, differences in thermal expansion or moisture response, mechanical impact, and aging or chemical attack. These factors can cause crack initiation at an interface and subsequent propagation along the boundary, resulting in visible separation, reduced strength, or compromised barrier properties.

Detection and prevention are central to management of splitlaag. Detection methods include non-destructive testing such as ultrasonic scanning, infrared thermography, or cross-sectional microscopy. Prevention strategies emphasize good surface preparation and cleaning, appropriate adhesion promoters or coupling agents, controlled curing or bonding cycles, selection of chemically compatible materials, use of interlayers to balance properties, and environmental controls during service.

See also: delamination, lamination, laminate materials, adhesive bonding.