The following is a summary of the main points learned during recent experimentation's.
- Samples taken from heavily wrinkled liners, preserved in pool water, surface dried, weighed, then desiccated to constant weight, indicate that absorbed water can reach as high as 10% of liner weight.
-
Immersion testing of precisely weighed liner samples in pure distilled water and sanitizer free tap water showed that weight gain due to absorbed water levelled off at 0.6%. No dimensional changes occurred.
- Immersion testing of precisely weighed liner samples in chlorinated and brominated water in the 20 to 50 ppm range showed weight gains that continued to climb indefinitely and did not level off. Dimensional increases of 1.0 - 3.0% were also measured on these samples.
- Immersion testing in water containing mono potassium persulphate type non-chlorine shock showed weight gains levelling off at about 0.6%, essentially identical to unsanitized tap water.
- Samples from heavily bleached, used pool liners showed high weight gains in immersion tests in comparison to unbleached samples, taken from the same liner from above the waterline. Bleached test samples curled into tight coils with the bleached surface facing to the outside, as a result of greater water absorption occurring on the faded side than on the unfaded side.
|