Kridee

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Kridee is a very thin spun fleece made of synthetic fibers based on polyamide . It was developed by Walter Kittelmann and Karl-August Reif in the GDR in the late 1960s and was intended as a substitute for jute fibers. The manufacturer's license was later sold to Bonn.

Surname

The fabric was after the two developers Walter K ittelmann and Karl-August R cif named. It is popularly claimed that the name was the abbreviation for "Not a real idea".

history

At the Scientific-Technical Center for Technical Textiles (WTZ) in Dresden, Walter Kittelmann and Karl-August Reif developed spunbonded nonwovens as a substitute for jute in 1968 , as importing from abroad was too expensive for the GDR. It was originally used as a packaging material or was used to secure construction routes in the hydraulic and civil engineering industries. The company Reifenhäuser from Troisdorf near Bonn became aware of the fabrics at the Leipzig trade fair . In 1974 they bought the manufacturing license and in return delivered systems for the production of foil tapes to Saxony.

According to a contractual clause, the East Germans had a share of the profits made by the mechanical engineering company through the sale of spunbond systems for ten years. But the first construction was ready for the market in 1985. Because the flow of information and communication to the plant engineering was prohibited by the GDR, the Rhineland company had to develop the technology on its own.

In 2005, Reifenhäuser sponsored a system costing around 5 million euros for the Saxon Textile Research Institute in Chemnitz. Today, 75 percent of all hygiene and medical nonwovens worldwide are produced on Reicofil lines. The fabric is also used to make flood sandbags.

Procedure

Nonwoven consists of extremely delicate plastic threads. In the GDR, polyamide and, depending on the type, 8 to 25% polyacrylate were added to the elementary thread fleece. Instead of polyamide, Reifenhäuser used polypropylene and developed the process further. Medical nonwovens are made up of several superimposed layers of nonwoven, the so-called spunbonded nonwoven and the meltblown nonwoven made from much thinner fibers.

Individual evidence

  1. ↑ a b c d e Katja Iken: Sächsisches Masken-Vlies The late export hit from the GDR , published in Spiegel on April 23, 2020, accessed on April 25, 2020
  2. ↑ a b G. Selke: Use of fleece to secure construction paths. In: Communications from the Research Institute for Shipping, Hydraulic Engineering and Foundation Engineering. Publication series Wasser- und Grundbau 38th Research Institute for Shipping, Hydraulic Engineering and Foundation Engineering, Berlin 1977, pp. 126–135 as a PDF facsimile , accessed on April 25, 2020
  3. ↑ Keyword: The perfectly packed sandbag , published in focus.de on May 27, 2010, accessed on April 25, 2020