Suojalippa

Suojalippa is a Finnish term meaning protective cap or lid. It refers to a cap designed to cover an opening, connector, or sensitive surface to prevent dirt, moisture, damage, or accidental contact. The term is used across multiple industries and the exact form depends on context, ranging from consumer packaging to industrial equipment.

Common forms include screw-on caps, snap-on caps, and hinged caps. They are made from plastics such as polypropylene or polyethylene, or from rubber, silicone, or metal. Many protective caps include seals or gaskets to improve moisture or dust resistance, and some are designed to be child-resistant or tamper-evident.

Applications span consumer packaging (bottles and tubes) as well as electrical and electronic equipment, where caps protect ports, connectors, or inactive components from dust and accidental contact. In industrial settings, suojalippa protect machine openings, pipe threads, or calibration ports during storage and transport.

Key design considerations include compatibility with the target thread or opening, material chemical resistance, temperature tolerance, durability, ease of removal, and any required environmental protection rating. Some standards specify required dimensions, color-coding, or locking features to ensure safety and reliability.

See also: protective cap, lid, plug, cap (container).