ARAMID FABRIC HAVING EXCELLENT ADHESION TO POLYURETHANE MATRIX RESIN AND EXCELLENT TENSILE STRENGTH, METHOD FOR MANUFACTURING SAME, ARAMID FABRIC PREPREG COMPRISING SAME, AND ARAMID FABRIC/THERMOPLASTIC POLYURETHANE RESIN COMPOSITE COMPRISING SAME
An aramid fabric having excellent adhesion to a polyurethane matrix resin and excellent tensile strength is manufactured by (i) weaving a basket-structured aramid fabric by using aramid yarns as warps and wefts, and then (ii) immersing the woven aramid fabric in a thickening liquid composed of an aqueous polyurethane resin, as a thickening agent, and water, followed by compressing and drying. In the present invention, the thickening agent is provided to the woven aramid fabric, thereby effectively preventing the deterioration in weaving efficiency due to the separation of the thickening agent during weaving, compared with a method in which a thickening agent is provided to an aramid yarn before weaving. Furthermore, in the present invention, an aqueous polyurethane resin is attached to or impregnated into a surface and the inside of the aramid fabric, and thus the adhesion of the aramid fabric to a polyurethane matrix resin is improved and the cohesion of aramid yarns in the aramid fabric is increased, so that the tensile strength of the aramid fabric is enhanced. Furthermore, in the present invention, the aramid fabric is woven in a basket structure, and thus the densification of the aramid fabric is lowered and the wetting property of the aramid fabric with the polyurethane matrix resin is improved, and as a result, the adhesive strength between the aramid fabric and the polyurethane matrix resin is enhanced. Therefore, the aramid fabric/thermoplastic polyurethane resin composite of the present invention is useful as an automobile part material such as an automobile bumper, or an electronic part material, which requires impact resistance.
» Number: WO2019066374A2 (A2)
» Publication Date: 04/04/2019
» Applicant: KOLON INCâ??[KR]
» Inventor: PARK HYUN JUNGâ??[KR]; YANG JI EUNâ??[KR] (1)
This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement Nº 737882.
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