GTS tapes for bonding and insulation are used in the manufacture of flexible flat cables (FFC).

There is an extensive range of base dielectric materials to choose from, such as Polyester, PEN, Polyimide and Aramid papers.

GTS has a range of adhesive for FFC production, from high-flow, fast application thermoplastics to thermosetting, solderable systems and can advise on process parameters.

The adhesive thickness can also be adjusted to accommodate various flat wire profiles.

GTS also offers very thin constructions suitable for the latest generation of surface mount device (SMD) jumpers.

Case Studies

Stress-resistant FFC tapes

  • Laminated flat cables are used to interconnect electronic components and provide a flexible, thin, alternative to standard wire harness. The insulation has to be capable of fast lamination in roll-to-roll processes but also to resist the downstream processes such as soldering and in addition to have a good resistance to temperatures in situ.

  • Thermo-setting adhesives such as GTS AS1085 are used to give the highest capability of temperature resistance, and these are laminated and then cured to give the best properties.

  • Pure thermoplastics may be coated which will give high flow and fastest lamination speeds. It is possible also to produce intermediate systems which are both capable of resisting temperature and which do not require a separate curing cycle. The flow may be optimised to give a good sealing around the wires but no excessive squeeze-out onto rollers.

  • Resistance to heat and stress in the cable is also be improved by the partial cross-linking of the adhesive. A recent development of a Polyester flat-cable tape has been shown to be resistant to heat-stresses in flat cables to 105°C without curing and is suitable for encapsulation of flat wires at high speeds.