Liimoina

Liimoina is a Finnish term that refers to adhesives or glues in plural form. In Finnish, liima means glue or adhesive, and liimoina can be used to describe various glues collectively or different adhesive products.

Adhesives are substances that bond materials by forming a cohesive force within the adhesive and an adhesive bond to the surfaces being joined. They can be broadly categorized into natural and synthetic types. Natural adhesives include animal glue (protein-based) and starch- or casein-based pastes, which have historical uses in woodworking and paper crafts. Synthetic adhesives cover a wide range of chemistries, such as polyvinyl acetate (PVA) for everyday bonding, epoxies for high strength, cyanoacrylates for rapid bonds, polyurethanes for moisture resistance, and silicones for flexible seals.

Adhesion occurs through chemical bonding, mechanical interlocking, and intermolecular forces. Curing methods vary: some adhesives cure by solvent evaporation, others by moisture or heat, and some require chemical reactions. The selection of an adhesive depends on factors such as substrate compatibility, required strength, temperature and moisture exposure, flexibility, and open time.

Common applications include woodworking, paper and packaging, construction, electronics assembly, textiles, and medical or industrial settings. Properties of interest include bond strength, shear and peel performance, cure time, aging resistance, and safety considerations. Proper handling, ventilation where needed, and disposal according to local regulations are important when working with adhesives.

Historically, adhesives have evolved from natural glues to advanced synthetic formulations, enabling reliable bonding across diverse industries.