帽形滚动薄膜是国外近年发展起来的一个新的薄膜品种。其外形如同“礼帽”(图1),由纤维增强织物覆以橡胶构成,其工作状态与活塞相似。当压力增加活塞下降时,薄膜侧面离开活塞壁,贴向气缸壁(图2)。当压力减低活塞上升时,则呈相反动作。由于动作时薄膜工作部位呈滚动状态,所以国外称这种薄膜为滚动薄膜(Rolling diaphragm)。我们则据其外形和动作特征总称为帽形滚动薄膜。 Hat-shaped rolling film is developed in recent years, a new film species. Its appearance as a “hat” (Figure 1), made of fiber-reinforced fabric covered with rubber composition, its working state and piston similar. As the pressure increases the piston descends, the diaphragm side leaves the piston wall and sticks to the cylinder wall (Figure 2). When the pressure decreases piston rises, the opposite action. Due to the action of the rolling parts of the working position of the film, so foreign film called rolling film (Rolling diaphragm). We are generally referred to as a hat-shaped roll film in terms of its shape and movement characteristics.