Composite bonded fabric with high transverse strength, process for the manufacture thereof and its use

A composite material consists of outer layers of fibrous (5) non-wovens and a central reinforcing layer derived from thermoplastic film. The reinforcing layer forms a regular repeated pattern, e.g. spaced parallel strips (2). The non-woven is bonded thermally to parts of the film, but there is no bo...

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Bibliographische Detailangaben
Hauptverfasser:	MARC PEHR, DIETER GROITZSCH, HANSJOERG GRIMM
Format:	Patent
Sprache:	eng
Schlagworte:	BANDAGES, DRESSINGS OR ABSORBENT PADS BRAIDING COTTON-WOOL DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS,NON-WOVEN FABRICS FILTERS IMPLANTABLE INTO BLOOD VESSELS FIRST-AID KITS FOMENTATION HUMAN NECESSITIES HYGIENE KNITTING LACE-MAKING LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARYMATERIAL MEDICAL OR VETERINARY SCIENCE NON-WOVEN FABRICS ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES PERFORMING OPERATIONS PROSTHESES TEXTILES TRANSPORTING TREATMENT OR PROTECTION OF EYES OR EARS TRIMMINGS WADDING
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Beschreibung
Zusammenfassung:	A composite material consists of outer layers of fibrous (5) non-wovens and a central reinforcing layer derived from thermoplastic film. The reinforcing layer forms a regular repeated pattern, e.g. spaced parallel strips (2). The non-woven is bonded thermally to parts of the film, but there is no bond in regions where the film has been torn. An Independent claim is also included for the process of making the composite by first laying down alternate layers of non-woven and continuous film. The film and non-woven are bonded locally in a regular pattern and the assembly is heated to shrink the film so that the non-woven buckles into waves. The material is then stretched to smooth out the non-woven while at the same time tearing the film where it is not bonded to the non-woven. Specifically claimed are applications in disposable operating gowns, hygiene or medical wrapping, nappies and sanitary towels.