Tyhjiöpakkauskalvoja

Tyhjiöpakkauskalvoja are specialized plastic films used in vacuum packaging. These films create an airtight barrier, essential for removing air from a package before sealing. This process significantly extends the shelf life of food products by preventing spoilage caused by oxidation, moisture loss, and the growth of aerobic bacteria.

The composition of tyhjiöpakkauskalvoja is crucial for their performance. They are typically made from multi-layered co-extruded plastics, often incorporating materials like polyethylene (PE), polyamide (PA), and sometimes ethylene-vinyl alcohol (EVOH). Polyethylene provides excellent sealing properties and flexibility, while polyamide offers superior puncture resistance and barrier properties against gases. EVOH is incorporated for its exceptional gas barrier capabilities, particularly against oxygen, which is vital for preserving freshness and preventing rancidity in fatty foods.

The thickness and material combination of the film are chosen based on the specific application. For delicate items, thinner, more flexible films might be used. For products requiring robust protection, thicker films with enhanced puncture resistance are preferred. The ability of these films to withstand the vacuum process without collapsing or losing their integrity is a key design consideration. They are also often designed to be heat-sealable, allowing for a secure closure once the air has been evacuated. Tyhjiöpakkauskalvoja are widely used in the food industry, including for meats, cheeses, seafood, and produce, as well as in non-food applications for protecting sensitive items from environmental factors.