We have 69 guests and no members online
Primary function of baby diapers is retaining body fluids, but also a minimizing the negatives associated with wearing such articles by increasing the comfort of the wearer.
Such improvements can mostly be classified to primarily fall within either of two categories: primarily relating to "core technology", i.e. "absorbency" in the broad sense of the word, or primarily relating to "chassis technology", i.e. fit.
The first addresses how to pick up and retain the body waste (generally in some state of fluidity) in an "absorbent (or core) structure", whereby the waste material is acquired by the article (picked up), then conducted away from the location of acquisition (distribution), and then stored (retained).
A core is generally made of a mix of fluff and SAP (hereunder we wil not cover special cores made of other materials or so called "fluffless core"). Usually this mix is “homogeneously blended” (HB): it means that SAP and fluff are in the same ratio everywhere along the core. The reason to have an HB core is because SAP works better when it is well mixed with fluff and this improves core general performances. Of course other type of constructions are possible altough, with current cores available on the market today, they do not reach performances that HB cores can.
Up to 80’s it was general practice to form absorbent core for infant diapers, entirely from wood pulp fluff. Given the relatively low amount of fluid absorbed by wood pulp fluff on a gram of fluid absorbed per gram of wood pulp fluff, it was necessary to employ relatively large quantities of wood pulp fluff, thus necessitating the use of relatively bulky, thick absorbent structures.
During 80’s SAPs were introduced in baby diaper cores and allowed to reduce wood pulp fluff usage.
Transdermal patches are becoming more and more popular. They are used to provide medication through your skin.
The transdermal patch consists of an adhesive layer that attaches it to the skin, and a reservoir that holds the medicine. The medicine must first diffuse out of the reservoir and onto the skin, and then through the skin and into the bloodstream. Since diffusion through the skin is a much slower process than diffusion through the stomach lining and into the bloodstream, and, since the patch reservoir is capable of holding a greater quantity of medicine than a pill capsule, the transdermal patch offers a method for increased dosage over a prolonged period of time.
Gel blocking is a reason of poor performance of many absorbent products available on the market especially when they have high quantity of hydrogel (SAP).
The term gel blocking describes a phenomenon that occurs when a hydrogel particle, film, fiber, etc. is wetted; the surface swells and inhibits liquid transmission to the interior of the product.