High speed rotary horizontal form fill seal pouch/sachet machines are commonly used in packaging of dry products, such as powders, coffee, candies, or seasoning blends. These machines run at very high speeds (up to 1,000 pouches per minute is not uncommon), and are well suited for high volume applications. The most common structures for these machines are paper/poly, or paper/poly/foil/poly, where the paper provides the stiffness and the heat resistance needed for successful production.
But what if your application requires clarity or metallized film where the metal look is part of the design? Then, you must use a film laminate with PET on the outside for heat resistance and a sealant layer with enough body to allow for good opening of the pouch in the filling section of the machine. The sealant layer has typically been made with LLDPE, which is a relatively soft film. In order to make film stiff enough for production, the thickness of the LLDPE is increased, which adds cost.
Multifilm’s line of SuperSeal products are an ideal way to provide the stiffness these applications require, at a much thinner gauge, and therefore a lower cost than traditional LLDPE sealant webs. SuperSeal is a laminate consisting of a PET film laminated to our proprietary cast extruded PP-based sealant film. Cast PP films are significantly stiffer by nature than LLDPE films, thus allowing for down gauging as noted above. At the same gauge they also provide twice the water barrier of LLDPE and better clarity.
The sealant film thickness’ range from 0.5 mils up to 2.0 mils. We have been successfully producing and supplying SuperSeal for high speed rotary form fill and seal machines for since 2002. The film is available clear or white and can be laminated to a metallized PET film for high barrier applications.