M. Mahalakshmia et al. 1055
2.1.3 Middle Layer Super Absorbent Polymer (SAP) is a highly absorbent material that can hold many times its weight in liquid in the middle layer (B). Menstrual fluids can be quickly absorbed and retained with the help of sanitary napkins. 2.1.4 Core Layer Bamboo Fiber: Gives the inner layer comfort and softness. Flax Fiber: Provides the core with extra strength and absorbency. Hemp Fiber: Boosts the absorbency of the core and adds to its environmental friendliness. 2.2. Testing methods for sanitary napkins
Table 1 lists the tests that were done to gauge sanitary napkin performance. Table 1 Tests carried out to gauge sanitary serviette performance qualities S.No. Performance Properties To Be Tested Testing Standards Remarks 1 Absorbency% IS:5405-1980 A-1.2
Retention%
2
IS: 5405-1980 5.1
These tests were done in 2 ways: 1. In-house method 2. performance tester method
Rewet under load
3
Modified IS: 5405-1980 5.1
Leak Factor
4
Modified IS: 5405-1980 5.1
MA001-1-diapers- worldwide.com
5
Fibre Absorbency
2.2.1 Absorbency test for sanitary napkins A burette, a glass plate, a sample stand, a weighing device, a stopwatch, goat blood with anticoagulant, or test fluid—both of which represented menstrual blood—were used in this experiment. After the napkin's dry weight (IN) was determined, it was set on a level, flat glass plate so that its underside could be observed. Liquid was dripped onto the centre of a sanitary napkin at a rate of 15 ml per minute at a height of approximately 1-2 mm away from the burette. The sanitary napkin's capability to absorb liquid was tested until it reached its limit and started to leak (as seen by the pad leaking on the sides), at which point it lost its ability to absorb liquid. The amount of liquid absorbed up to the end point was measured in millilitres (ml) and the values were tabulated based on the burette readings. The absorbency percent of the sanitary napkin was determined by measuring its capacity to absorb blood up until the point of leakage. The absorbency% was calculated using the formula:
Absorbency% = ((FA-IN)/ (IN))*100 IN - Initial weight of the whole napkin FA - Final weight of napkin 2.2.2 Retention%, leak factor and rewet under load
Menstrual blood with an anticoagulant or test fluid, which approximated menstrual blood, a burette, a glass plate, a stand to hold the sample, one kilogramme of weight, blotting
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