Multilaag

Multilaag is a term used in materials science to describe a laminate or composite structure that comprises multiple thin layers bonded together. The aim of a multilaag is to combine the properties of different materials—such as toughness, stiffness, barrier resistance, or thermal stability—into a single, functional material. The constituent layers can be polymers, metals, ceramics, or organic-inorganic composites, and they are joined with adhesives, interlayers, or direct bonding.

Common fabrication methods include lamination, co-extrusion, roll-to-roll coating, and layer-by-layer deposition. Interlayers or tie layers are often used to improve adhesion between dissimilar materials and to control diffusion, stress, and delamination.

The performance of a multilaag depends on layer thickness, material choice, and interfaces. Typical advantages include improved gas and moisture barriers, reduced weight, enhanced thermal or electrical insulation, and tailored optical or mechanical properties. Because of these features, multilaags are used in packaging (especially food and pharmaceuticals), electronics encapsulation and interconnect stacks, construction insulation and cladding, automotive and aerospace coatings, and renewable energy devices such as thin-film solar modules.

Challenges include delamination under thermal cycling, moisture ingress, and differences in thermal expansion between layers. Recycling and end-of-life disposal are also considerations, given the mixed-material nature. The term multilaag is broadly descriptive and is used in several languages to denote a multi-layer laminate rather than a single standardized specification.