UD TAPE WITH IMPROVED PROCESSING PROPERTIES AND METHOD FOR PRODUCING SAME

• Main Authors: UNGER STEFAN, LIZER, DAVID, LEWINGER, HOLGER
• Format: Patent
• Language: Chinese; English
• Published: 22.08.2023
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The invention relates to a method for producing a unidirectional tape, said method comprising the steps of: a) providing an impregnation slurry comprising primary and secondary particles, water, optionally an organic vehicle medium, optionally an organic compound and optionally a surface-active compound, and providing a layer of unidirectional fibers having an average filament gap distance, wherein the primary particles comprise a first polymer and the particle size of the primary particles is equal to or less than the average filament interstitial distance, and the secondary particles comprise a second polymer and the particle size of the secondary particles is greater than the average filament interstitial distance, b) impregnating a unidirectional fibrous layer with an impregnating slurry to form an impregnated unidirectional fibrous web comprising an impregnated unidirectional fibrous layer comprising unidirectional fibers and primary particles, preferably consisting of unidirectional fibers and primary p