| 摘要 |
<p>In a shoe press belt, in which the nip zone (N) is narrower than the shoe width (S), the shearing force which normally acts on the belt at the outer boundary of the nip zone (N) is made either weak or non-existent by forming the outer portions (Y) of the belt of less hardness than the inner, or central, portion (K) of the belt, so that the less hard portions (Y) can be positioned directly opposite the outer boundaries of the nip zone (N). Alternatively, the outer portions (Y) of the belt can be made thinner than the central portion (K) of the belt and the thinner portions positioned directly opposite to the nip zone (N) boundaries. The shearing force applied to the belt at the nip ends of the roll is reduced or eliminated, cracking resulting from the shear force is reduced or avoided, and a belt having improved durability results. <IMAGE></p> |
