Rope Packings – Product Selection Considerations
Manufactured by braiding or plaiting high temperature yarns to create a rope packing profile suitable for sealing hot air / gases in furnace, oven, and other heat processing applications. Choice of yarn is determined by the temperatures involved as well as gas and moisture content emitted from the chamber.
Maximum Temperature <550°C – E Glass Fibre Rope Packing
Maximum Temperature <750°C – HT750 Glass Fibre Rope Packing
Maximum Temperature <1000°C – Silica Fibre Packing or Bio Soluble Fibre Packing
Maximum Temperature <1100°C – Belcotex® 110 Fibre Packing
Maximum Temperature <1260°C – Ceramic Fibre Packing or Alumina Silica Fibre Packing.
Consideration should also be given to the density required.
Low Density Rope Packing
Low Density Packings are made by braiding yarns around a soft lagging insulation core creating a compressible and soft seal.
Standard Density Rope Packing
Standard Density Packings account for 90% of all rope packings sold and are manufactured by braiding yarns around a dense fill of continuous fibre yarns. They are firm in density with slight compression.
High Density Rope Packing (Braid over Braid)
High Density (Sometimes referred to as Brick Solid) packings are extremely hard and manufactured by braiding high temperature yarns over more braids of high temperature yarns (Braid on Braid). These packings are especially useful in the aluminium industry as mark free padding supports for hot aluminium sheeting or as Kiln Car Door seals.
Textile Technologies rope packing's can be further enhanced as follows:
- By adding vermiculite dispersions to increase abrasion resistance and temperature rating.
- By adding graphite dispersions to increase abrasion resistance and exhibit a dark grey / black colour for aesthetics.
- By coating with a food grade silicone to prevent airborne fibre contamination.
- By coating PTFE dispersions to further improve sealing quality.
- Covering the packing with a metal outer braid to improve abrasion resistance and encapsulation of the sealing medium. This can be done in one of three ways as follows:
- A flexible knitted metal outer sheath.
- Partial Coverage metal steel outer braid.
- Full Coverage metal outer braid Kiln Packing
Contact Textile Technologies for further information or to seek further guidance with product selection.
- Eddy Ashworth