Lämpöliimaus

Lämpöliimaus, known in English as heat sealing, is a process of joining materials, typically thermoplastics, by applying heat and pressure. This method relies on the principle of melting the surfaces of the materials to be joined, allowing them to fuse together as they cool. The heat can be applied through various methods, including direct contact with a heated bar, radio frequency waves, or ultrasonic vibrations.

The materials commonly joined by heat sealing include films like polyethylene, polypropylene, and PVC, as well as rigid plastics. The effectiveness of the process depends on several factors, such as the type of plastic, the temperature applied, the pressure exerted, and the duration of the heating cycle. Proper control of these parameters is crucial to achieve a strong and durable bond without damaging the material.

Heat sealing is widely used in various industries. In packaging, it is essential for creating airtight and watertight seals on bags, pouches, and containers, preserving food products and ensuring product integrity. It is also employed in the medical field for sealing sterile packaging for devices and pharmaceuticals. Furthermore, heat sealing finds applications in the textile industry for creating waterproof seams and in the manufacturing of inflatable products. The advantages of heat sealing include its speed, efficiency, and the absence of additional adhesives, making it an economical and clean joining method.