A few weeks ago, German trading and consulting company Kager added a new range of semi-finished products made of various special textiles that can withstand temperatures of up to 1,000° C to its portfolio. The company offers a wide range of innovative product solutions for use in high-temperature applications. Among other things, these are suitable for the realization of heat-, spark- and flame-resistant applications in insulation, fire protection and refractory technology.
Kager has added three textile high-temperature semi-finished products to its product range. These are tapes, hoses and cords made of special fabrics with maximum temperature strengths of 300° C to 1,000° C, which are predestined for use in fire protection, furnace construction and heating and thermal engineering as well as in insulation and refractory applications. The textile high-temperature semi-finished products are offered with various fabric structures and densities.
Application temperatures up to 900° C
The new specialty textile Kager Hi-Tex 1000 can be used in a variety of applications. The cords, tapes and hoses made of this soft, flexible, and coated glass-fiber fabric are suitable for application temperatures up to about 900° C continuously and up to about 1,000° C for short periods. Thus, the fabric can provide a high level of continuous insulation even at high heat. In tests, six hours under the influence of a propane gas flame passed without any signs of melting on the material.
The reason for this lies in the special property of the fabric to conduct the incident heat largely radially - i.e., along its surface - and less through the fabric. The high insulation effect that can be achieved as a result goes hand in hand with high tensile strength and high resistance to abrasion, sparks, and splashes of molten metal, as well as very little smoke development. Kager Hi-Tex 1000 also has a high dielectric strength and constant of 5.9 - 6.4 at 60 MHz and 5.8 - 6.3 at 1 MHz. Cords, tapes, and hoses made of the material are unimpressed by most acids, alkalis and solvents. Only hydrofluoric acids and corrosive environments at high temperatures harm the high-tech textile. It is cold-resistant down to -73° C.
Continuous use up to 500° C
As an alternative for applications with operating temperatures of up to 500° C, Kager has included hoses, tapes and cords made of Hi-Tex 500 in its range. The semi-finished products made of this white glass fiber fabric are designed for continuous use at up to 500° C and withstand temperatures of up to 550° C for short periods. Their base material consists of voluminized, textured (roughened) E-glass fiber yarn in thicknesses of 6 to 9 microns. Hi-Tex 500 is inorganic, sterile, fireproof, asbestos-free, contains no toxins or heavy metals, and causes no skin irritation. The melting point of the material is 1,200° C, and its tensile strength is about 3,400 MPa.
High mechanical strength and good chemical resistance
The third textile innovation in the Kager portfolio goes by the product name Carbokev 70/30. Tape goods made of this material consist of a special yarn composed of carbopan and aramid fibers. Carbopan fibers are made of polyacrylinitrile (PAN) without the addition of binders or mineral fillers. They have a temperature resistance of up to 400° C, high mechanical strength and good chemical resistance. Aramid fiber, on the other hand, is temperature-resistant up to a maximum of 300° C, but also scores with high mechanical resistance. Semi-finished products made of Carbokev 70/30 are therefore well suited for heat and thermal insulation tasks that require resistance to mechanical damage (e.g. abrasion) at rather moderate temperatures.