Dalfratex™ ceramic cloths & fibers for vacuum & thin film processes
Dalfratex is a range of asbestos free, inorganic fibers and textiles
in the form of ceramic cloths and insulators. The ceramic cloths and
fibers are capable of operating continuously at temperatures to 1000
C - and up to 1600 C for limited periods.
They will not melt or vaporize until the temperatures exceed 1700 C, and have a very high resistance to thermal shock. Dalfratex products also provide flexible electrical insulation at temperatures as high as 1000 C.
Available forms
Bulk fiber, batt, cloths, tapes, cordages, yarns, sleevings, ropes,
seals, thermal radiation shields.
Composition |
% |
SiO2 |
98.57% |
TiO2 |
0.3% |
AL2O3 |
0.47% |
Fe2O3 |
0.08% |
B2O3 |
0.06% |
CaO |
0.05% |
MgO |
0.07% |
Alkali |
0.13% |
Total |
99.73% |
Balance |
H2O and trace elements |
Performance
Originally developed for the thermal insulation of gas turbine
jet pipes, Dalfratex products have played a vital role in the European
aerospace industries since the 1960s. Asbestos free, Dalfratex offers
an improved, higher temperature performance than asbestos or glass
fiber in many applications. Dalfratex products are also widely employed
in nuclear reactor applications.
Chemical properties
Dalfratex offers high chemical stability at high and low temperatures
under the action of acids, with the exception of hydrofluoric acid
and phosphoric. Dalfratex is not recommended for use in contact with
strong alkaline materials. Most products are heat treated to minimize
shrinkage and out-gassing during use.
