用于连续硫化的胶料,必须考虑避免气泡和具有快的硫化速率这两个附加条件。避免气泡的方法有:1) 使用低挥发性的增塑剂;2) 用氧化钙来控制水分;3) 提供高的胶料粘度来消除内部气泡。然而,低硬度胶料很多无机填充胶料或填充量大的胶料通常需用真空压出机压出。通常想要有很快的硫化速率,但为了得到适当的加工安全性,有必要考虑减缓一些硫化速率。 For continuous vulcanizates, two additional conditions must be considered to avoid bubbles and to have a fast cure rate. There are several ways to avoid bubbles: 1) Use of low volatility plasticizers; 2) Use of calcium oxide to control moisture; and 3) Provide high sizing viscosity to eliminate internal bubbles. However, the low hardness of a lot of inorganic filler or filling large amount of rubber compound usually need to use a vacuum extruder out. It is often desirable to have a very fast cure rate, but it is necessary to consider slowing down some cure rates in order to get proper process safety.