ACCUMULATOR AND BLADDER FOR ACCUMULATOR TO BE USED FOR THAT ACCUMULATOR

摘要

PURPOSE:To provide an accumulator having high durability and long life and a bladder for the accumulator to be used for the accumulator. CONSTITUTION:A bladder 22 for an accumulator is a composite layer wherein the following layers (B) are formed integrally on both the top and bottom of the following layer (A) and the following layers (C) are laminated respectively to the layers (B) for integration and the composite layer wherein thicknesses of the layers (A), (B) and (C) satisfy the following formulas is contained as the film orming element. The (A) is an elastic central layer consisting mainly of polyamide resin. The (B) is a screen layer comprised of an ethylene vinyl alcohol copolymer. The (C) is an elastic layer consisting mainly of polyamide resin. (C)/(B)=1.0...(1), 0.1=(A)/(B)=3.5...(2).