A feminine hygiene pad comprising: a bottom non-absorbent layer haying a predetermined color; a top absorbing layer comprising the same color as the bottom layer with the exception of a small area located near or around a center of the top absorbing layer that is lighter in color than both the bottom and top layers so that a user can detect initial saturation
of the top absorbing layer by viewing the small area; and an adhesive secured to at least a portion of the bottom non-absorbent layer for retaining the pad in place in an undergarment or garment.
If the initial saturation pressure before decompression is [P.
Figure 3 shows the number of bubbles formed in a natural rubber at temperatures of 25[degrees]C and 100[degrees]C at various initial saturation pressures, [P.
b] depending on the initial saturation pressure [P.
Also, the modified classic theory in the pre-exponential term by Goel and Beckman (6) predicts no bubble formation below the initial saturation pressure of 18 MPa.
The growth rate of the bubble radius is mainly determined by the pressure difference between the initial saturation pressure [P.
2] bubble in PMMA solution for several different initial saturation pressures.
Figure 11 shows the observed data and calculation values of the equilibrium cell radius with various initial saturation pressures.