SOFT AND DURABLE NONWOVEN WEB

• Main Authors: Mark G. KUPELIAN, Ray A. STERLING, Lei HUANG, John H. CONRAD, Jeffrey J. KRUEGER
• Format: Patent
• Language: English; Spanish
• Published: 08.08.2017
• Subjects: BANDAGES, DRESSINGS OR ABSORBENT PADS; BRAIDING; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, ORSURGICAL ARTICLES; COTTON-WOOL; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS; DISINFECTION, STERILISATION, OR DEODORISATION OF AIR; 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; MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARYMATERIAL; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICALARTICLES; MEDICAL OR VETERINARY SCIENCE; METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS INGENERAL; NON-WOVEN FABRICS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; PROSTHESES; TEXTILES; TREATMENT OR PROTECTION OF EYES OR EARS; TRIMMINGS; WADDING

A nonwoven web that contains a plurality of fibers formed from a polyolefin composition is provided. The polyolefin composition contains a rigid propylene polymer that has a relatively high melting temperature and modulus of elasticity, which can provide good strength and durability to the nonwoven web. The polyolefin composition also contains a ductile propylene polymer that has a relatively high melt flow index, which can help achieve relatively fine fibers that minimize the stiffness of the web. In addition to a rigid and ductile polymer, the polyolefin composition also contains a slip additive (e.g., fatty acid derivative). Among other things, such an additive can even further enhance the overall softness of the composition. Se proporciona una trama no tejida que contiene una pluralidad de fibras formadas a partir de una composición de poliolefinas. La composición de poliolefinas contiene un polímero rígido de propileno que tiene una temperatura de fusión y un módulo de elasticidad relativamente altos, que pueden proporcionar buena resistencia y durabilidad a la trama no tejida. La composición de poliolefinas contiene, además, un polímero dúctil de propileno que tiene un índice de fluidez relativamente alto, lo cual puede ayudar a lograr fibras relativamente finas que minimizan la rigidez de la trama. Además de un polímero rígido y dúctil, la composición de poliolefinas también contiene un aditivo de deslizamiento (p.ej., derivado de ácidos grasos). Entre otras cosas, el aditivo puede incluso mejorar aún más la suavidad general de la composición.