ELASTIC LAMINATE AND A METHOD FOR PRODUCING AN ELASTIC LAMINATE

• Main Authors: JAN WAESTLUND-KARLSSON, ELISABETH LAKSO, MARGARETA WENNERBAECK
• Format: Patent
• Language: English
• Published: 15.03.2013
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; BANDAGES, DRESSINGS OR ABSORBENT PADS; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS; FILTERS IMPLANTABLE INTO BLOOD VESSELS; FIRST-AID KITS; FOMENTATION; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HUMAN NECESSITIES; HYGIENE; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; MEDICAL OR VETERINARY SCIENCE; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; PERFORMING OPERATIONS; PROSTHESES; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TRANSPORTING; TREATMENT OR PROTECTION OF EYES OR EARS; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

THE INVENTION CONCERNS A METHOD FOR PRODUCING AN ELASTICALLY STRETCHABLE LAMINATE (19) COMPRISING AT LEAST THREE LAYERS (1, 6, 18), THE METHOD INCLUDING THE STEPS OF: A). PRODUCING A FIRST LAMINATE (8) COMPRISING A FIRST NON-ELASTIC FIBROUS NONWOVEN WEB (1) AND AN ELASTIC FILM (6); B) ACTIVATING THE FIRST LAMINATE (8) BY INCREMENTAL STRETCHING IN AT LEAST ONE DIRECTION TO RENDER THE FIRST LAMINATE (8) ELASTICALLY STRETCHABLE; C) STRETCHING THE ACTIVATED FIRST LAMINATE (8) TO 10-200% IN AT LEAST ONE DIRECTION; AND D) LAMINATING THE STRETCHED FIRST LAMINATE (8) TO A SECOND NON-ELASTIC NONWOVEN WEB (18). AN ELASTICALLY STRETCHABLE LAMINATE PRODUCED IN ACCORDANCE WITH THE METHOD IS ALSO DISCLOSED.