The latest development in hydroentanglement (German)

Developments in hydraulic entanglement or spunlacing are discussed. New heads and jet strips with a long service life are noted. The basis for high-performance installations Is considered. Spunlaced fabrics ensure that maintenance costs are low. End-uses include medical textiles(surgical gowns, wound dressings), hygienic products, automot..

Method for making a strong and soft web

The present invention provides a method for making a strong and soft nonwoven web. A neckable nonwoven web is fed in a first direction. The neckable nonwoven web is subjected to incremental stretching in a direction perpendicular to the first direction. A tensioning force is applied to the neckable nonwoven web to neck the nonwoven web. O..

Needling technology applied to geotextiles

The paper describes the mechanical bonding of staple fibre webs produced by carding. Cross-lapping and needling of spur-laid felts. Each of the three stages of needling are discussed: Pre-needling, drafting and finish needling. Some special features of the Dilo-Needle loom and other Dilo needling solutions are presented.

Two-dimensional analysis of card web irregularity

Irregularity of the surface mass density of a card web is presented as a two-dimensional random field. Transverse nonhomogeneity of the web is studied, and homogeneous equivalents of the measured random field irregularity are obtained using a homogenization procedure. The degree of influence of the card webs transverse nonhomogeneity is e..

Computer modelling of the mechanical properties on nonwovens

A very succesful approach for the assesment of failure properties of material, called fracture mechanics, has been developed in last decades. The requirement of existence of at least one identifiable crack causes that fracture mechanics is not able to predict the failure by a simple tensile test. Hence the substantial difference is made b..

Computational model for predicting mechanical behavior of point-bonded webs: A progress report

Present state of development of a mechanical model for point-bonded webs is reported. It is assumed that the web, consisting of straight fibers of equal (finite) length, uniform areal density and orientation distribution is subjected to general homogeneous deformation. The two-dimensional model developed can account for a range of specifi..

Polymers and fibres in disposable medical product

The author studied various products such as absorbent layers, coatings and adhesives which are used in disposable baby diapers and sanitary napkins. Their properties and performance are evaluated and the reasons for differences in absorption properties are discussed. PP and PE fabrics are used where diapers and sanitary napkins touch the ..

Antimicrobial structures

Antimicrobial material with high activity are outlined in this article. Kimberly Clark discovered that when thinly coated onto a substrate with a hydrophobic surface certain antimicrobial agents such as chitosan exhibit a higher antimicrobial activity than the activity of the agent alone. When applied to the surface of a polypropylene non..

Nonwovens for medical and hygienic end-uses

Investigations reveal that spunlace technology in combination with air laying offers an opportunity to produce nonwovens for the medical and hygiene sectors. At the same time energy and resources can be conserved and profits can be increased. The use of cotton, increase labour and wood pulp is discussed and the Fleissner Aquajet spunlace ..

The effect of technological parameters of making a nonwoven precursor on the physical properties of carbon non-wovens for sorptive materials

The process of making carbon active non-wovens can generally be reduced to the following stages: 1. the selection of fibres of the properties favourable for the raw material intended for adsorptive material, 2. making a non-woven precursor of the raw material selected, 3. subjecting the non-woven precursor to a carbonization process, 4. t..