FILMLESS BACKSHEETS WITH GOOD BARRIER PROPERTIES

A multilayer nonwoven structure is described where the nonwoven structure comprises at least two spun bond layers and at least one easily meltable layer. The easily meltable layer is located between the at least two spunbond layers. The easily meltable layer is comprised of a polymer having a meltin...

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Bibliographic Details
Main Authors MARTIN, JILL M, CLAASEN, GERT J
Format Patent
LanguageEnglish
French
Published 10.03.2016
Subjects
BRAIDING
COTTON-WOOL
FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS,NON-WOVEN FABRICS
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
NON-WOVEN FABRICS
PERFORMING OPERATIONS
TEXTILES
TRANSPORTING
TRIMMINGS
WADDING
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Summary:A multilayer nonwoven structure is described where the nonwoven structure comprises at least two spun bond layers and at least one easily meltable layer. The easily meltable layer is located between the at least two spunbond layers. The easily meltable layer is comprised of a polymer having a melting point at least 20°C less than the melting point of the polymer which comprises the surface of the fibers which comprise the spun bond layer, or is made from a polymer which is readily absorbs some form of radiation. Under bonding conditions, the fibers which make up the easily meltable layer can be melted to form a film, thereby improving barrier properties of the nonwoven structure. L'invention concerne une structure non tissée multicouche, ladite structure non tissée comprenant au moins deux couches de liaison filées-liées et au moins une couche facilement fusible. La couche facilement fusible est agencée entre les au moins deux couches filées-liées. La couche facilement fusible est composée d'un polymère qui présente un point de fusion qui est inférieur d'au moins 20 °C au point de fusion du polymère qui comprend la surface des fibres qui comprennent la couche filée-liée ou est constituée d'un polymère qui absorbe facilement une certaine forme de rayonnement. Dans des conditions de liaison, les fibres qui constituent la couche facilement fusible, peuvent être fondues pour former un film, ce qui permet d'améliorer les propriétés de barrière de la structure non tissée.
Bibliography:Application Number: WO2014US61724