New Hudson Corporation has manufactured covered rollers for the float glass industry since 1964. New Hudson was a pioneer in the development of Non Asbestos covered lehr rollers beginning in 1979. Since that time, New Hudson Corporation has manufactured several thousand non-asbestos covered lehr rollers for over (84) float glass plants worldwide.
FF800 (MB 800)
Covered lehr rollers are very common in the flat glass industry-typically used in the B, C, D and RET zones of the annealing lehr. The most frequently used covering material is Tenmat¡¯s FireFly 800 (MB 800). Introduced in 1981, a mineral fiber millboard product, FireFly 800 has a long history of successful performance in the float glass industry.
Covered rollers are non-marking, have less affinity for sodium sulfate and dross deposits and provide excellent dimensional stability in the lehr. The primary disadvantage of covered rollers is the occurrence of embedded cullet and vulnerability to cullet damage. The primary types of covering materials are mineral fiber and alumina silicate fiber.