Form fill seal pouches belong to flexible packaging containers, which protect products more efficiently than cans, bottles and cardboard containers, and they are increasingly more convenient for the consumers. And therefore, they are widely used in the food, chemical, hardware and pharmaceuticals industries.
Form fill seal pouches may be made of machinable films, treated paper and foil, and laminate layers. What should be paid attention to is that the materials must be self-supporting and heat-sealable. Materials that do not heat seal naturally may be used by treating or laminating them with heat-sealing materials.
There are many basic types of form fill seal pouches, such as pillow pouch, three side seal pouch, and four side seal pouch and so on.
Pillow pouch, also called back-side-sealing pouch, is mostly manufactured by folding a trip of web material lengthwise. The back-side seal makes it into a tube, and the top and bottom seals separate the tube into individual pouch. There are two types of pillow pouches classified on whether they could stand up themselves: vertically formed pillow pouch and horizontally formed pillow pouch.
Vertically formed pillow pouches are generally produced on a vertical form fill seal packaging machine that forms the pouch, loads the product into it and seals it. Because vertically formed pillow pouches can often substitute for rigid packaging, such as jars and bottles etc., their using fields increase rapidly.
Horizontally formed pillow pouches are mainly manufactured on a horizontal form fill seal machine.
Three side seal pouch
Three side seal pouches have two side seals and a top seal strip. The bottom of the three-side-seal pouches is generally formed by folding plastic films horizontally, while the two sides and the top of the pouches are formed by heat seals. This type of pouches with edgefold can stand on the shelf directly.
Generally, four side seal pouches are made of two separate webs of material and can be formed into all kinds of shapes, such as heart-shaped, oval and so on. The four sides of this pouch are surrounded by heat seal areas.