ADL Teaser

Dry babies make happy mothers and fathers

Nothing should be allowed to leak out, cause wetness or apply pressure. Modern diapers may look simple, but they hide some complex technology. High-performance nonwoven fabrics from Freudenberg Performance Materials guide the wetness to the suction core, thus ensuring dry skin, active babies and happy parents.

Little Mathias from Cologne in Germany is 14 months old. He crawls, walks, climbs and discovers a little more of his world every day. His mother takes care to ensure that he is not bothered by uncomfortable wetness during his explorations. With two children between four years and almost a year and a half, she has become a true expert on diapers. “The most important thing is that no liquid escapes”, Marion Kelter explained. “The diaper also needs to fit optimally and should be as thin as possible so that it does not interfere with movement.” Around 10,000 kilometers away from her, Larissa Miura De Souza is dealing with the same theme in Sao Paulo, Brazil. Her son, Miguel is two and a half years old and she is expecting her second child soon. “Especially at night, a diaper needs to be able to absorb a lot of moisture”, she commented.

A child needs five to six diapers a day. This corresponds to around 4,500 diapers in two and a half years. Depending on its size, the capacity of a diaper can be up to 500 milliliters.

Whether girl or boy, urination delivers a large amount of fluid in a small area. To ensure that the fluid is absorbed as well as possible, an ingenious high-tech system is required. Firstly, a skin-friendly fleece, the topsheet, absorbs the moisture. The underlying ultra-thin layer, also referred to as a distribution layer, then ensures the rapid and uniform spreading of the liquid across the entire diaper. The underlying layer can absorb multiple times its own weight of liquid. These so-called super absorbers consist of high-tech fibers (mostly in powder form), which swell when liquid is absorbed, transforming into a gel and ensuring that no liquid is released, even under pressure. In this way, the urine is securely contained.

ADL Layer

Consumers pay attention to quality

Freudenberg Performance Materials in Jacarei, Brazil, supplies its customers in South and North America with nonwovens for the topsheet and distribution layer, known as ADL* for short. The latter is becoming increasingly important. “Whereas diapers used to have to be as cheap as possible, consumers in Brazil and also worldwide are now paying much more attention to quality and want to ensure that their babies stay dry as long as possible”, explained Sonia Mancilha, Head of Supply Chain Management in South America.

“Our special nonwoven ADL* is the heart of a diaper and significantly increases its overall performance.”

Sonia Mancilha, Head of Supply Chain Management, Freudenberg Nao-Tecidos Ltda. Jacarei, Brazil
*Acquisition and Distribution Layer
Hygiene

Using high-tech to improve footprint and handprint

A diaper without ADL would need to be changed more frequently because the super absorber would not be able to absorb as such intense doses of liquid. This would result in a significantly higher number of diapers being consumed. As a result, using a distribution layer also makes a contribution to sustainability”, Marcus Simon explained. As Business Segment Manager Medical at Freudenberg Performance Materials in Weinheim, Germany, he was intensively involved in the production of the special polyester nonwoven and has worked with customers on its further development. “We have continuously improved the ADL and have meanwhile been able to reduce the amount of material used without compromising performance.” Through the course of their history, diapers have become ever thinner and more absorbent.

Triumph of the disposable diaper

It all started with Marion Donovan, a young mother in 1940s USA. As the daughter of an inventor, she unceremoniously sewed an impermeable cover made from a shower curtain for her children's cloth diapers in the hope that she would no longer need to be constantly washing both diapers and soaked bedding. After finding that her version of rubber pants sold like hot cakes to New York mothers, she searched for a way to absorb urine with the help of paper. However, she was unable to find any paper capable of capturing liquid quickly enough. In the 1950s, Procter & Gamble began working on improving Donovan's invention and launched the disposable diaper onto the market in the 1960s as a major innovation. Where a diaper used to weigh roughly 100 grams just a few years ago, today it weighs around 70 grams less.

Life cycle assessment: cloth or disposable?

Opinions are divided on the life cycle assessment of the different diaper systems. According to the German Federal Environment Agency, reusable cloth diapers are not automatically more environmentally friendly. Although fewer raw materials are consumed in their production, they need to be boil-washed after each use. In addition, pesticides, mineral fertilizers and large volumes of water are often used in the cultivation of the cotton used in cloth diapers.

Paralax

However comfortable and easy diaper changing is for today's babies and parents, sooner or later everyone has to face the next challenge: getting the child out of diapers. All children around the world are able to master this between one and a half and four years. Which still leaves plenty of time for Mathias and Miguel to conquer their little worlds in peace.

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