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CN-121989513-A - Unidirectional fiber reinforced carbon fiber net structure, preparation method thereof and carbon fiber reinforced fabric

CN121989513ACN 121989513 ACN121989513 ACN 121989513ACN-121989513-A

Abstract

The invention discloses a unidirectional fiber reinforced carbon fiber net structure, a preparation method thereof and a carbon fiber reinforced fabric, and belongs to the technical field of fiber fabrics. The unidirectional fiber reinforced carbon fiber net structure comprises two types, namely, a symmetrical sandwich structure which is formed by alternately superposing and bonding at least one unidirectional fiber bundle layer and one carbon fiber net tire layer with the same quantity, and a symmetrical sandwich structure which is formed by alternately superposing and bonding more than two unidirectional fiber bundle layers and more than one odd carbon fiber net tire layer, wherein the upper surface and the lower surface of the sandwich structure are unidirectional fiber bundle layers, and the middle carbon fiber net tire layer is a symmetrical plane. The unidirectional fiber bundle layer is composed of carbon fiber bundles which are arranged in parallel at equal intervals along the length direction of the carbon fiber net tire. The invention solves the problems of low mechanical property, easy layering between layers, complex process and the like of the traditional carbon fiber unidirectional fabric, has the advantages of strong customization, high production efficiency, low cost and the like, and is suitable for reinforcing and strengthening reinforced concrete structures and bridges.

Inventors

  • LI BO
  • LI XIAOJING
  • HU FANGTIAN
  • DING YUNHE

Assignees

  • 南京玻璃纤维研究设计院有限公司

Dates

Publication Date
20260508
Application Date
20260129

Claims (11)

  1. 1. The unidirectional fiber reinforced carbon fiber net structure is characterized by being formed by alternately superposing and bonding at least one unidirectional fiber bundle layer and one carbon fiber net tire layer, wherein the unidirectional fiber bundle layer is formed by arranging a plurality of carbon fiber bundles at equal intervals in parallel along the length direction of the carbon fiber net tire.
  2. 2. A unidirectional fiber reinforced carbon fiber net structure is characterized by being formed by alternately laminating and bonding more than two even unidirectional fiber bundle layers and more than one odd carbon fiber net tire layers, wherein the unidirectional fiber bundle layers are positioned on the upper surface and the lower surface of the unidirectional fiber reinforced carbon fiber net structure to form a symmetrical sandwich structure taking a middle carbon fiber net tire layer as a symmetrical plane, and the unidirectional fiber bundle layers are formed by a plurality of carbon fiber bundles which are arranged in parallel at equal intervals along the length direction of a carbon fiber net tire.
  3. 3. A unidirectional fiber reinforced carbon fiber mesh structure according to claim 1 or 2, wherein the spacing of the carbon fiber bundles in the unidirectional fiber bundle layer is less than or equal to 0.8mm.
  4. 4. The unidirectional fiber reinforced carbon fiber mesh structure of claim 1 or 2, wherein the carbon fiber mesh tire layer has a gram weight of 10-80 g/m2 and a pore size distribution of 1-5 mm.
  5. 5. A method of making a unidirectional fiber reinforced carbon fiber web structure as defined in claim 1, comprising the steps of: (1) The method comprises the steps of (1) spreading a net tire, namely leading out the carbon fiber net tire from a net tire roller, and winding the net tire on a winding roller through a rolling device to form a carbon fiber net tire layer; (2) Yarn discharging, namely leading carbon fiber yarn out of each yarn cylinder after a plurality of carbon fiber yarn cylinders are arranged in parallel through yarn guide rollers, regulating the drafting force through a tension controller, and forming a unidirectional fiber bundle layer which is arranged in parallel in a unidirectional mode at equal intervals after the interval is controlled by a grid; (3) Glue spraying and shaping, namely attaching the unidirectional fiber bundle layer to the upper surface or the lower surface of the carbon fiber net tyre layer, and spraying glue solution at the joint interface by a glue spraying device to enable the unidirectional fiber bundles and the carbon fiber net tyre to be overlapped and bonded; (4) Rolling and bonding, namely bonding the laminated unidirectional fiber bundle layer and the carbon fiber net tire layer under high pressure of 0.2-1.0MPa by a rolling device to form a unidirectional fiber reinforced carbon fiber net structural unit consisting of one unidirectional fiber bundle layer and one carbon fiber net tire layer; (5) Repeating the steps (1) - (4) to form a unidirectional fiber reinforced carbon fiber net structure formed by laminating a plurality of unidirectional fiber bundle layers and carbon fiber net tire layers; (6) And (3) shaping and winding, namely winding the unidirectional fiber reinforced carbon fiber net structure on a winding roller at a constant speed through a traction device.
  6. 6. A method of making a unidirectional fiber reinforced carbon fiber web structure as defined in claim 1, comprising the steps of: (1) The method comprises the steps of (1) spreading a net tire, namely leading out the carbon fiber net tire from a net tire roller, and winding the net tire on a winding roller through a rolling device to form a first carbon fiber net tire layer; (2) Yarn discharging, namely leading carbon fiber yarns out of each yarn cylinder after a plurality of carbon fiber yarn cylinders are arranged in parallel through yarn guide rollers, regulating the drafting force through a tension controller, and forming a first unidirectional fiber bundle layer which is arranged in parallel at equal intervals in a unidirectional way after the interval is controlled by a grid; (3) Glue spraying and shaping, namely attaching the first unidirectional fiber bundle layer to the upper surface and the lower surface of the first carbon fiber net tyre layer, and spraying glue solution at the joint interface through a glue spraying device to enable the unidirectional fiber bundles and the carbon fiber net tyre to be overlapped and bonded; (4) Rolling and bonding, namely bonding the laminated unidirectional fiber bundle layers and the carbon fiber net tire layers under high pressure of 0.2-1.0MPa by a rolling device to form a unidirectional fiber reinforced carbon fiber net symmetrical sandwich structure unit consisting of two first unidirectional fiber bundle layers and one first carbon fiber net tire layer; (5) Secondary spreading, namely leading out the carbon fiber net tyre from a net tyre roller, and winding the carbon fiber net tyre on a winding roller through a rolling device to form a second carbon fiber net tyre layer; (6) Secondary yarn discharging, namely leading the carbon fiber yarn out of each yarn cylinder after a plurality of carbon fiber yarn cylinders are arranged in parallel through yarn guide rollers, regulating the drafting force through a tension controller, and forming a second unidirectional fiber bundle layer which is arranged in parallel at equal intervals in one direction after the interval is controlled by a grid; (7) Bonding by secondary glue spraying, namely bonding a second unidirectional fiber bundle layer with the upper surface of a second carbon fiber mesh tire layer to form a unidirectional fiber reinforced carbon fiber mesh structural unit consisting of a unidirectional fiber bundle layer and a carbon fiber mesh tire layer, bonding the second carbon fiber mesh tire layer of the unidirectional fiber reinforced carbon fiber mesh structural unit with the upper surface and the lower surface of the unidirectional fiber reinforced carbon fiber mesh symmetrical sandwich structural unit in the step (4), and bonding the second unidirectional fiber bundle layer, the second carbon fiber mesh tire layer and the unidirectional fiber reinforced carbon fiber mesh structural unit by spraying glue solution through a glue spraying device at the bonding interface of the second unidirectional fiber bundle layer and the second carbon fiber mesh tire layer and the bonding interface of the unidirectional fiber reinforced carbon fiber mesh symmetrical sandwich structural unit; (8) Repeating the steps (5) - (7) to form a symmetrical sandwich structure of the unidirectional fiber reinforced carbon fiber net, wherein the sandwich structure is formed by laminating and bonding a plurality of unidirectional fiber bundle layers and carbon fiber net tire layers; (9) And (3) shaping and winding, namely winding the symmetrical sandwich structure of the unidirectional fiber reinforced carbon fiber net on a winding roller at a constant speed through a traction device.
  7. 7. The method for producing a unidirectional fiber-reinforced carbon fiber web structure according to claim 5 or 6, wherein in the step (2), the distance between the yarn guiding rollers is 5-15 mm, and the drafting force of the carbon fiber bundles is 0.5-3 n/bundle.
  8. 8. The method for producing unidirectional fiber-reinforced carbon fiber web structure of claim 5 or 6, wherein in the step (3), the glue spraying amount of the glue spraying device is 5-15% of the total weight of the fibers.
  9. 9. The method for preparing a unidirectional fiber reinforced carbon fiber net structure according to claim 5 or 6, wherein the glue solution is thermosetting epoxy resin or thermoplastic PA/PEEK, and the atomized particle size is 10-100 μm.
  10. 10. The method for producing a unidirectional fiber-reinforced carbon fiber web structure according to claim 5 or 6, wherein in the step (4), the rolling temperature is 60 to 120 ℃, and the rolling time is more than 0 and less than or equal to 0.5s.
  11. 11. A carbon fiber reinforced fabric, characterized in that the fabric is composed of the unidirectional fiber reinforced carbon fiber net structure of claim 1 or 2, the surface density is 100-300g/m2, and the warp tensile strength is more than or equal to 3500MPa.

Description

Unidirectional fiber reinforced carbon fiber net structure, preparation method thereof and carbon fiber reinforced fabric Technical Field The invention relates to the technical field of fiber fabrics, in particular to a unidirectional fiber reinforced carbon fiber net structure, a preparation method thereof and a carbon fiber reinforced fabric. Background The traditional carbon fiber fabric is buckled due to warp and weft interweaving, and certain loss exists in mechanical properties, but at present, the domestic carbon fiber unidirectional fabric product is usually formed by a plurality of warp carbon fiber bundle yarns, a plurality of hot melt threads form wefts and a plurality of carbon fiber bundle yarns to be woven into unidirectional cloth. The method is applied to reinforcement of reinforced concrete structures and bridges. In order to increase the strength of the carbon fiber unidirectional fabric, two ends of a plurality of hot melt wires forming wefts can be respectively fixed together by adopting the hot melt wires. The hot melt wire is mostly inert foreign matters in the forming and service stages of the composite material, and the problems of out-of-control thickness, reduced mechanical properties and the like can be caused. Japanese patent 200710038411.X carbon fiber prepreg is characterized in that 1-20 g/m < 2 > of carbon fiber prepreg with more than 1 inorganic particle selected from silicon carbide particles, aluminum oxide particles and kaolin particles is attached on the surface of the fabric, the surface inorganic particle modification is adopted to improve the mechanical property of the planar fabric, the inorganic particles are easy to fall off, the Z-direction reinforcement is limited, the overall mechanical property of the obtained fabric is low, and the process is complex. The patent application of China 202020272430.X 'a chopped fiber reinforced thermoplastic prepreg fabric structure' comprises a unidirectional carbon fiber fabric layer, chopped fibers soaked by liquid bonding emulsion and a thermoplastic resin adhesive film, wherein the unidirectional carbon fiber fabric layer, the chopped fibers soaked by the liquid bonding emulsion and the thermoplastic resin adhesive film are sequentially arranged from bottom to top, but chopped fiber spray bundling is adopted, the risk of fiber slippage exists, and the anchoring strength is low. Disclosure of Invention The invention provides a unidirectional fiber reinforced carbon fiber net structure, a preparation method thereof and a carbon fiber reinforced fabric, which aim to solve the technical problems of low mechanical property, complex process and the like of the traditional carbon fiber unidirectional fabric. The technical scheme adopted by the invention is as follows: The invention provides a unidirectional fiber reinforced carbon fiber net structure, which is formed by alternately superposing and bonding at least one unidirectional fiber bundle layer and one carbon fiber net tire layer, wherein the unidirectional fiber bundle layer is formed by a plurality of carbon fiber bundles which are arranged in parallel at equal intervals along the length direction of the carbon fiber net tire. Further, the spacing of carbon fiber bundles in the unidirectional fiber bundle layer is less than or equal to 0.8mm. Further, the gram weight of the carbon fiber net tire layer is 10-80 g/m <2 >, and the pore size distribution is 1-5 mm. The preparation method of the unidirectional fiber reinforced carbon fiber net structure comprises the following steps: (1) The method comprises the steps of (1) spreading a net tire, namely leading out the carbon fiber net tire from a net tire roller, and winding the net tire on a winding roller through a rolling device to form a carbon fiber net tire layer; (2) Yarn discharging, namely leading carbon fiber yarn out of each yarn cylinder after a plurality of carbon fiber yarn cylinders are arranged in parallel through yarn guide rollers, regulating the drafting force through a tension controller, and forming a unidirectional fiber bundle layer which is arranged in parallel in a unidirectional mode at equal intervals after the interval is controlled by a grid; (3) Glue spraying and shaping, namely attaching the unidirectional fiber bundle layer to the upper surface or the lower surface of the carbon fiber net tyre layer, and spraying glue solution at the joint interface by a glue spraying device to enable the unidirectional fiber bundles and the carbon fiber net tyre to be overlapped and bonded; (4) Rolling and bonding, namely bonding the laminated unidirectional fiber bundle layer and the carbon fiber net tire layer under high pressure of 0.2-1.0MPa by a rolling device to form a unidirectional fiber reinforced carbon fiber net structural unit consisting of one unidirectional fiber bundle layer and one carbon fiber net tire layer; (5) Repeating the steps (1) - (4) to form a unidirectional fiber reinforced carbon fib