PROCESO PARA PREPARAR FIBRAS INDIVIDUALIZADAS RETICULADAS DE ACIDO POLICARBOXILICO CON OLOR REDUCIDO Y BRILLO MEJORADO

• Main Authors: CLIFFORD ROY BOLSTAD, PEDRO ANTONIO RODRIGUEZ, WILLIAM LLOYD DUNCAN, WALTER DOUGLAS DANIELS, JEFFERY TODD COOK, PETER ALLEN GRAEF
• Format: Patent
• Language: Spanish
• Published: 23.04.1998
• Subjects: APPARATUS THEREFOR; BANDAGES, DRESSINGS OR ABSORBENT PADS; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, ORSURGICAL ARTICLES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS; DISINFECTION, STERILISATION, OR DEODORISATION OF AIR; FILTERS IMPLANTABLE INTO BLOOD VESSELS; FIRST-AID KITS; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR; FOMENTATION; HUMAN NECESSITIES; HYGIENE; IMPREGNATING OR COATING OF PAPER; LAUNDERING; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICALARTICLES; MEDICAL OR VETERINARY SCIENCE; METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS INGENERAL; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; PAPER NOT OTHERWISE PROVIDED FOR; PAPER-MAKING; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; PRODUCTION OF CELLULOSE; PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS; PROSTHESES; PULP COMPOSITIONS; REGENERATION OF PULPING LIQUORS; TEXTILES; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; TREATMENT OF TEXTILES OR THE LIKE; TREATMENT OR PROTECTION OF EYES OR EARS; TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS,FABRICS, FEATHERS, OR FIBROUS GOODS MADE FROM SUCH MATERIALS

COMPRENDIENDO LOS SIGUIENTES PASOS: I) PROPORCIONAR FIBRAS CELULOSICAS, II) CONTACTAR DICHAS FIBRAS CON UNA SOLUCION QUE CONTENGA UNA CANTIDAD EFECTIVA DE AGENTES DE UNION INTERMOLECULAR DE ACIDO POLICARBOXILICO C2-C9, III) SEPARAR MECANICAMENTE DICHAS FIBRAS EN FORMA SUBSTANCIALMENTE INDIVIDUAL, IV) SECAR LAS MENCIONADAS FIBRAS Y REACCIONAR EL MENCIONADO AGENTE UNIDO INTERMOLECULARMENTE CON LAS MENCIONADAS FIBRAS PARA FORMAR ENLACES UNIDOS INTERMOLECULARMENTE MIENTRAS LAS FIBRAS MENCIONADAS SE ENCUENTRAN EN SU FORMA SUBSTANCIALMENTE INDIVIDUAL, PARA FORMAR ENLACES UNIDOS INTERMOLECULARMENTE INTRAFIBRA, Y V) AUMENTAR EL pH DE LAS FIBRAS UNIDAS INTERMOLECULARMENTE A POR LO MENOS 5 A TRAVES DEL CONTACTO DE LAS MENCIONADAS FIBRAS UNIDAS INTERMOLECULARMENTE CON UNA SOLUCION ALCALINA Disclosed is a process for making reduced odor individualized, crosslinked fibers which includes the steps of providing cellulosic fibers, contacting the fibers with a solution containing a C2-C9 polycarboxylic acid crosslinking agent, mechanically separating the fibers into substantially individual form, drying the fibers and reacting the crosslinking agent with the individualized fibers to form intrafiber crosslink bonds. The individualized cellulosic fibers are then contacted with a strong alkaline solution and strong oxidizing agent to reduce the odor and increase the brightness. Preferably, the crosslinking agent is citric acid, and preferably, between about 1.0 weight % and about 12.0 weight % of the crosslinking agent reacts to form the intrafiber crosslink bonds. Preferably, the alkaline solution is an aqueous solution of sodium hydroxide, and preferably, about 0.09 weight % of the sodium hydroxide, on a dry fiber weight basis, is applied to the crosslinked fibers. Preferably, the oxidizing agent is hydrogen peroxide, and preferably, about 0.04 weight % of the hydrogen peroxide, on a dry fiber weight basis, is applied to the crosslinked fiber. The reduced odor individualized, crosslinked fibers are useful in a variety of absorbent structure applications.