Multifilm offers a wide variety of heat-seal flow wraps, from the most economical single web OPP films to sophisticated laminates for your most demanding applications. Our flow wrap films can be used for a variety of food products, including mints, gummies, bakery products, chocolate and granola bars, and much more.
We currently only offer heat-seal flow wraps. Many of our heat-seal flow wraps offer the advantage of hermetic seals that protect the product better resulting in potentially longer shelf life. Most cold-seal flow wrap materials have a limited shelf life due to the sealing materials drying out with time and unfavorable storage conditions.
Limited wrapping speed is often cited as the number one issue with heat seal flow wrapper, and this is definitely true for certain OPP and PE based structures. However, Multifilm’s proprietary flow wrap materials Hi-Z and SuperSeal are cast extruded and have a heat seal layer that is up to six times thicker than the seal layer of OPP films. The nature of casting film allows for this and it makes a huge difference in speed and seal integrity. Compared to PE, which is occasionally used for flow wrapping, SuperSeal and Hi-Z both have excellent hot tack, which allows the film to seal immediately, with very little dwell time needed. Depending on the machine and the product, our films can run between 1,600 – 2,000 pcs/min.
SuperSeal is our proprietary cast polypropylene sealant web for flow wrap applications. It’s available in white and clear, in gauges ranging from 0.40 – 2.5 mil. SuperSeal can be laminated to a variety of substrates depending on usage, including PET, OPP, Matte OPP, and paper. It’s ideal for any high-speed flow wrap application where speed and seal integrity are important.
Hi-Z is similar to SuperSeal, but metallized for additional barrier. It’s available in various thicknesses ranging from 0.75 – 1.6 mil. Hi-Z can be laminated to PET, OPP, Matte OPP, and paper. Hi-Z is ideal for sensitive products, including chocolate bars and truffles, powders, granola, or anything containing nuts or other sensitive ingredients. Hi-Z has an outstanding oxygen and moisture barrier, < 0.20 and < 0.02 respectively. Along with a very thick seal layer, Hi-Z offers protection for your product that could only be rivaled by foil.
We also offer OPP flow wraps for applications where speed, seals, and barrier are less critical. OPP flow wrap is not laminated, and is therefore often very cost effective. We offer clear and metallized OPP flow wrap in gauges ranging from 0.70 – 1.2 mil. OPP flow wrap is ideal for hard candy, mints, cookies, crackers, and other items that turn over quickly and are not sensitive to air and moisture. Because OPP flow wrap is not laminated, the sealing window is relatively small and speeds will be slower. However, Multifilm stocks several grades of OPP, and some may be able to achieve speeds of up to 1,200 pcs/min on modern equipment. Average speeds are typically less than 1,000 pcs/min for this product.