LyTherm® 550-L Utility Grade Paper is processed from unwashed spun, high purity alumina-silica fibers formed into a highly flexible sheet. It is recommended for continuous use at temperatures up to 2300°F (1260 C) in applications where insulating efficiency is not critical. LyTherm® 550-L is designed for use primarily in applications where thermal stability and high temperature protection up to 2300°F (1260°C) are most important, such as high temperature parting plane in refractory linings or as an expansion joint.
LyTherm® 550-L Utility Paper contains organic binder to provide increased handling strength at room temperature. It possesses excellent chemical stability and resists attack from corrosive agents. Exceptions are hydrophilic and phosphoric acids and concentrated alkalis. Because of its high-purity chemistry, LyTherm® 550-L Utility Paper resists both oxidation and reduction. If it becomes wet due to water, steam or oil, its thermal and physical properties will return upon drying.
Easy to cut wrap or form
Low thermal conductivity
Low heat storage
Thermal shock resistant
High heat reflectance
Good dielectric strength
Excellent corrosion resistance
Parting plane in refractory linings
Combustion chamber liners
Backup lining for metal troughs
Hot top linings
Thermal and electrical insulation
Coke oven door shock absorption
Kiln car deck covering