Rubber for shock-absorbing heating press pad, manufacturing method therefor, shock-absorbing heating press pad and method of manufacturing a printed circuit board

摘要

A value of loss tangent (tan delta ) of a rubber in accordance with dynamic viscoelasticity measurement is set to be 0.04 or lower, when temperature condition is set to press temperature of hot press and frequency condition is set to a time period corresponding to one press cycle of the hot press. Such a rubber is used as a hot press cushioning pad (3). IMAGE