Baby diapers are absorbent pants used for the babies that are not toilet trained. Diapers consist of top cover of polypropylene, middle layer of absorbent, polyethylene back sheets and elastic bands. The absorbent used in diapers is super absorbent polymer (SAP). Super absorbent polymer is the polymer with high absorbent property and also called as slush powder. Super absorbent polymer can absorb water double of its weight and generally made up of corn or wheat based and wood pulp. The uppermost cover is made up of non woven hydrophilic sheets that pass the urine.
Our experiment’s purpose is to find which newborn diaper, Huggies Little Snugglers or Pampers Swaddlers, absorbs more simulated urine (5% salt water). The Pampers diaper is composed of an average of 3.97 g of sodium polyacrylate, linked on a thin thread, and an average of 0.71 g of cotton. Huggies has an average of 1.88 g of fine powdery sodium polyacrylate and an average of 6.97 g of cotton. Huggies has about 10 times the amount of cotton that Pampers has, while Pampers has only 2 times the amount of sodium polyacrylate that Huggies has. Based on the amount of sodium polyacrylate which absorbs 30 times its own weight in urine and the amount of cotton which absorbs 27 times its own weight, we predicted that Huggies would absorb more simulated urine. We added 1 mL of 5% salt water at a time until the indicator on each diaper was full. When the indicator signaled it was full, Huggies absorbed an extra 33 mL of 5% salt water compared to Pampers. When the diaper reached its leaking point in a vertical position, Pampers absorbed an average of 83 mL before leaking and Huggies absorbed an average of 130.5 mL. This shows Huggies absorbed 48 mL more of 5% salt water than Pampers. Both diapers absorbed more than 58 mL, the amount a newborn can urinate between each feeding. We believe the amount of cotton, the powdery sodium polyacrylate, the engineering design of the diaper, and other factors made Huggies more effective. So there you go parents! Huggies is more absorbent than Pampers.
To put the 100 ml in perspective, that would correspond to , at the upper limit of the size 1 range, which is what we were after to put the diapers to task at stress-test levels. After slowly wetting the diaper with 100 ml, we waited one minute for the diaper to absorb and distribute before adding 30 lbs of weight evenly distributed over the diaper area. This process was then repeated for another one minute interval of rest and weighting. We believe this weighting and unweighting process is important to be realistic, since the diapers are designed to redistribute the urine and then [ideally] absorb/lock it into the core away from baby's skin. Baby's movements play a role in that redistribution process. The time and 30 lbs weight were used to simulate, in standardized and highly repeatable manner, the redistribution of fluid in the diaper's core that naturally occurs from baby's movements. At the end of this process, most diapers will have absorbed the 100 ml into their inner core, and the surface layer which sits next to baby's skin should ideally be mostly dry. However, we found that some diapers did not completely trap the fluid in the diaper core; some diapers leaked from the edges, exhibited spots where fluid pooled, or simply were wet to the touch across significant areas of the diaper's top layer.
Diapers are worn by babies before they are toilet trained to prevent feces and urine from getting on the surrounding environment. We will do an experiment to determine which diaper can absorb more urine.