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CN-121992558-A - Nine-grid three-dimensional fabric forming process

CN121992558ACN 121992558 ACN121992558 ACN 121992558ACN-121992558-A

Abstract

The invention relates to a nine-grid three-dimensional fabric forming process which comprises the following steps of constructing a three-dimensional framework with at least 3X 3 array cavities by adopting first warp yarns, second warp yarns and weft yarns of a skin-core structure, adopting a first type orthogonal interlocking structure at a central node and adopting a second type surrounding binding structure at a peripheral node so as to enhance the overall stability, then injecting functional materials into the cavities, melting or dissolving the first warp yarn skin layers in a thermal or solvent mode, then solidifying the functional materials, thereby sealing the functional materials inside the unit cavities, and finally binding the nodes by the weft yarns and applying hot-pressing reinforcement. The process can realize differential design of the cavity structure and stable packaging of functional materials, and is suitable for preparing a composite material preform with heat management, sensing or bearing functions.

Inventors

  • WEI BIN

Assignees

  • 浙江巨力宝纺织科技有限公司

Dates

Publication Date
20260508
Application Date
20260205

Claims (10)

  1. 1. The nine-grid three-dimensional fabric forming process is characterized by comprising the following steps of: S1, providing a first warp yarn, a second warp yarn and weft yarns, wherein the first warp yarn and the second warp yarn are of a sheath-core structure, and the melting point or the dissolution temperature of the sheath layer is lower than that of the core layer by 20-80 ℃; S2, arranging the first warp yarns along the thickness direction of the fabric, arranging the second warp yarns along the length direction of the fabric, and arranging the weft yarns along the width direction of the fabric to form a three-dimensional framework embryonic form with the number of layers not less than 3; s3, weaving by adopting a three-dimensional orthogonal or angle interlocking structure in the three-dimensional framework embryonic form, and binding X-direction weft yarns and Y-direction second warp yarns by using Z-direction first warp yarns to form a nine-grid structure at least provided with a 3X 3 array cavity; S4, at the cavity node positioned in the geometric center, the middle-path yarns of the first warp yarn and the middle-path yarns of the second warp yarn are penetrated, folded and wound to form a first-class orthogonal interlocking node; at eight peripheral cavity nodes surrounding the central node, wrapping the upper and lower yarns of the first warp yarn with the left and right yarns of the second warp yarn, respectively, at non-orthogonal angles to form a second type surrounding binding node; S5, after the cavity is formed and before the node structure is completely tightened and fixed, functional materials are injected into the cavity; s6, melting the skin layer of the first warp yarn by heating or dissolving the skin layer by a solvent, and then resolidifying or solidifying the skin layer to seal the functional material inside each unit cavity; s7, binding all the nodes by utilizing the weft yarns, and reinforcing the whole fabric by applying a hot pressing force of 0.2-0.8 MPa.
  2. 2. The nine-grid three-dimensional fabric forming process according to claim 1, wherein the melting of the first warp yarn skin layer is induced by adopting a hot pressing mode, the resolidification is carried out by adopting a cold air flow at a temperature of 5-15 ℃ to blow for 0.5-2 seconds, and the melting of the first warp yarn skin layer is solidified by adopting a spray of 5-10wt% CaCl 2 or NaCl aqueous solution of 0.05-0.2g/cm < 2 >.
  3. 3. The nine-grid three-dimensional fabric forming process according to claim 2, wherein the volume ratio of the sheath core to the first warp yarn is 30/70-50/50, the sheath melting point or the dissolution temperature is less than or equal to 180 ℃, and the volume ratio of the sheath core to the second warp yarn is 20/80-40/60, and the sheath melting point or the dissolution temperature is 10-30 ℃ higher than that of the first warp yarn.
  4. 4. A nine-grid three-dimensional fabric forming process according to claim 3, wherein the first warp yarn, the second warp yarn and the weft yarn are monofilaments, multifilaments, air textured yarns or core spun yarns, and the yarn density is 2-20tex.
  5. 5. The process for forming a three-dimensional fabric with a nine square grid according to claim 4, wherein the breaking strength of the first warp yarn, the breaking strength of the second warp yarn and the breaking strength of the weft yarn are not lower than 10cN/tex, and the initial modulus is not lower than 20GPa.
  6. 6. The process for forming a three-dimensional fabric of nine squares according to claim 1, wherein the volume of the functional material injected into the central cavity is 1.5 to 2.0 times the volume of the peripheral cavity injected, and the viscosity of the functional material at a shear rate of 10s "1 is 50 to 500 mPa-s.
  7. 7. The process for forming a three-dimensional fabric with a nine-square lattice according to claim 6, wherein after forming, the central cavity has dimensions of 1.1-1.4 times of the dimensions of the peripheral cavity in the corresponding directions respectively in X, Y, Z directions.
  8. 8. The nine-block three-dimensional fabric molding process according to claim 1, wherein in step S7, the application temperature of the hot pressing force is 50-120 ℃, and the dwell time is 30-180 seconds.
  9. 9. A process for forming a three-dimensional fabric of nine squares according to claim 1, wherein in step S6, the rate of resolidification or solidification after melting or dissolution of the skin layer is not less than 5 ℃ per S.
  10. 10. The process for forming a three-dimensional fabric with a nine-square lattice according to claim 1, wherein in the step S5, the functional material is injected as a liquid, a gel or a microcapsule of a phase change material having a phase change temperature of 100 ℃ or less.

Description

Nine-grid three-dimensional fabric forming process Technical Field The application relates to the technical field of textile manufacturing, in particular to a nine-grid three-dimensional fabric forming process. Background With advances in technology and the growing demand for high performance materials, research and development of functional textiles is increasingly receiving attention. The traditional two-dimensional fabric has certain limitations in structure and function, and is difficult to meet the requirements of certain special application scenes, such as intelligent textiles needing integrated sensing, heating, cooling, energy storage or shock absorption and the like. Three-dimensional fabrics, particularly fabrics with internal cavity structures, provide a new approach for the encapsulation and integration of functional materials. At present, the manufacturing method of the three-dimensional fabric mainly comprises multi-layer weaving, three-dimensional weaving, knitting and the like, however, the existing three-dimensional fabric manufacturing technology is difficult to accurately form an internal cavity with specific geometric arrangement (such as a nine-grid) and has low control precision on the size and shape of the cavity. And yarn nodes in the three-dimensional fabric are key parts bearing stress, if the joint connection strength is insufficient, the fabric structure is easy to loosen, and the overall performance and the packaging stability of functional materials are affected. Therefore, we propose a nine-grid three-dimensional fabric forming process. Disclosure of Invention The application aims to provide a nine-grid three-dimensional fabric forming process, and aims to solve the problems of functional material encapsulation, balance of mechanical property and functionality, production efficiency and cost and insufficient node connection strength in the prior art. In order to achieve the above purpose, the application provides a nine-grid three-dimensional fabric forming process, which comprises the following steps: S1, providing a first warp yarn, a second warp yarn and weft yarns, wherein the first warp yarn and the second warp yarn are of a sheath-core structure, and the melting point or the dissolution temperature of the sheath layer is lower than that of the core layer by 20-80 ℃; S2, arranging the first warp yarns along the thickness direction of the fabric, arranging the second warp yarns along the length direction of the fabric, and arranging the weft yarns along the width direction of the fabric to form a three-dimensional framework embryonic form with the number of layers not less than 3; s3, weaving by adopting a three-dimensional orthogonal or angle interlocking structure in the three-dimensional framework embryonic form, and binding X-direction weft yarns and Y-direction second warp yarns by using Z-direction first warp yarns to form a nine-grid structure at least provided with a 3X 3 array cavity; S4, at the cavity node positioned in the geometric center, the middle-path yarns of the first warp yarn and the middle-path yarns of the second warp yarn are penetrated, folded and wound to form a first-class orthogonal interlocking node; at eight peripheral cavity nodes surrounding the central node, wrapping the upper and lower yarns of the first warp yarn with the left and right yarns of the second warp yarn, respectively, at non-orthogonal angles to form a second type surrounding binding node; S5, after the cavity is formed and before the node structure is completely tightened and fixed, functional materials are injected into the cavity; s6, melting the skin layer of the first warp yarn by heating or dissolving the skin layer by a solvent, and then resolidifying or solidifying the skin layer to seal the functional material inside each unit cavity; s7, binding all the nodes by utilizing the weft yarns, and reinforcing the whole fabric by applying a hot pressing force of 0.2-0.8 MPa. Preferably, the melting of the first warp yarn skin layer is induced by adopting a hot pressing mode, the resolidification is carried out by adopting a cold air flow at a temperature of 5-15 ℃ for 0.5-2 seconds, and the melting of the first warp yarn skin layer is solidified by adopting spraying of 5-10wt% CaCl 2 or NaCl aqueous solution at a temperature of 0.05-0.2g/cm < 2 >. Preferably, the first warp yarn sheath-core volume ratio is 30/70-50/50, the sheath melting point or the dissolution temperature is less than or equal to 180 ℃, and the second warp yarn sheath-core volume ratio is 20/80-40/60, and the sheath melting point or the dissolution temperature is 10-30 ℃ higher than that of the first warp yarn. Preferably, the first warp yarn, the second warp yarn and the weft yarn are monofilaments, multifilaments, air textured yarns or core spun yarns, and the yarn density is 2-20tex. Preferably, the breaking strength of the first warp yarn, the breaking strength of the second warp yarn and the breaking