Because Polo is a TOTAL Source manufacturer we offer more than one option for sealing thermoplastic film. Another manufacturing option offered for custom sealed products is Impulse Sealing. This sealing method lends itself to a much wider variety of materials compared to RF sealing.
Impulse sealing is a method of bonding like films where the material is gripped by a pair of sealing jaws, heated up to its melting temperature by a powerful, electrical impulse of short duration applied through one or both jaws. The material is cooled to it solid state and allowed to develop satisfactory strength while still under pressure.