Preparation process of intelligent temperature-adjusting fabric

Abstract

The invention relates to the technical field of fabrics, in particular to a preparation process of an intelligent temperature-adjusting fabric, which is used for applying a phase-change material to the fabric to realize an automatic temperature-adjusting function, and comprises a fabric body, the preparation process of the fabric body comprises the following steps: step 1, adopting a circular knitting machine, selecting a needle cylinder density of 28-40 stitches / inch for a surface layer and a bottom layer, the middle layer is connected with the surface layer and the bottom layer through connecting yarns to form gray fabric with a hollow layer, and grooves distributed in a matrix mode are formed in the weaving process through jacquard needle selection; step 2, preparing a phase change microcapsule with a polyurethane net structure; step 3, mixing the prepared phase change microcapsules with the polyurethane net structure with an adhesive according to a mass ratio of 1: (0.5-2), and uniformly coating the mixture on the gray fabric; 4, the coated fabric is subjected to curing treatment, so that the temperature adjusting layer is firmly attached to the gray fabric layer; and step 5, carrying out an after-finishing process on the fabric body according to needs to prepare the intelligent debugging fabric.

Description

Technical Field

[0001] The present invention relates to the technical field of fabrics, and in particular to a preparation process of intelligent temperature-regulating fabrics. Background Art

[0002] With the advancement of science and technology and the improvement of people's quality of life, traditional fabrics can no longer meet people's needs for comfort and functionality. Especially in terms of temperature regulation, traditional fabrics cannot automatically adjust the temperature inside the fabric according to changes in ambient temperature, resulting in discomfort when wearing. In recent years, phase change materials have attracted much attention due to their unique temperature regulation function, but how to effectively integrate them into fabrics remains a technical challenge. Summary of the invention

[0003] Therefore, in order to solve the above problems, the present invention provides a process for preparing an intelligent temperature regulating fabric which realizes automatic temperature regulation by applying phase change material to the fabric.

[0004] To achieve the above object, the present invention adopts the following technical solutions: A preparation process of an intelligent temperature regulating fabric includes a fabric body, and the preparation process of the fabric body includes the following steps: Step 1: Using a circular knitting machine, the needle density of the surface layer and the bottom layer is 28 to 40 needles per inch, the middle layer is connected to the surface layer and the bottom layer by connecting yarn to form a grey fabric with a hollow layer, and the grooves distributed in a matrix are formed by jacquard needle selection during the knitting process; Step 2: preparing phase change microcapsules with polyurethane network structure; Step 3: Mix the prepared polyurethane network structure phase change microcapsules with a binder in a mass ratio of 1:0.5-2, and evenly coat the mixture on the grey cloth; Step 4: Curing the coated fabric to ensure that the temperature regulating layer is firmly attached to the grey fabric layer; Step 5: According to the needs, the fabric body is subjected to post-finishing process to make intelligent debugging fabric.

[0005] Furthermore, the preparation process of the phase-change microcapsules of the polyurethane network structure in the above step 2 comprises the following steps: a. Prepare an oil phase medium solution: mix butyl stearate and isophorone diisocyanate in a mass ratio of 1:0.2 to form an oil phase; b. Prepare an aqueous medium solution: mix distilled water and styrene-maleic anhydride copolymer in a mass ratio of 4:0.05 to form an aqueous phase; c. Prepare emulsified suspension: Mix the oil phase medium solution and the water phase medium solution in a high-speed shear emulsifier at an emulsification speed of 9000 rpm for 10 minutes; d. Initiating polymerization reaction: adding triethanolamine to the emulsified suspension, the molar ratio of triethanolamine to isophorone diisocyanate being 0.5:1, the dropping time being 15 minutes, and after the dropping is complete, keeping the temperature at 40°C for 1.5 hours; e. Post-treatment: Raise the temperature to 65°C and keep it for 4 hours, then raise the temperature to 70°C and keep it for 2 hours, and finally raise the temperature to 80°C and keep it for 5 hours. After the reaction is completed, cool down and discharge the material to obtain phase change microcapsules with polyurethane network structure.

[0006] Furthermore, the adhesive is polyurethane resin.

[0007] Furthermore, in the above step three, after the polyurethane network structure phase change microcapsules are mixed with the polyurethane resin, they are coated into the grooves at a rate of 10 to 30 m / min using a slit coating method, and the coating pressure is 0.2 to 0.6 MPa.

[0008] Furthermore, in the above step three, after the polyurethane network structure phase change microcapsules are mixed with the polyurethane resin, they are coated into the grooves by a slit coating method at a rate of 18 m / min and a coating pressure of 0.5 MPa.

[0009] Furthermore, in the above step 4, the curing treatment is: first preheat at 50-70°C for 2-5 minutes to allow the adhesive to initially form a film, then cure with ultraviolet light at a wavelength of 365nm and an intensity of 80-120mW / cm² for 5-30 seconds, and finally crosslink under hot air at 120-150°C for 3-8 minutes.

[0010] Furthermore, in the above step 4, the curing treatment is: first preheating at 65°C for 4 minutes to allow the adhesive to initially form a film, then curing with ultraviolet light at a wavelength of 365nm and an intensity of 110mW / cm² for 20 seconds, and finally crosslinking under hot air at 135°C for 6 minutes.

[0011] Furthermore, the circular knitting machine includes a needle disk, an upper knitting needle, an upper triangle seat, an upper triangle, a needle cylinder, a first lower knitting needle, a second lower knitting needle, a connecting needle, a jacquard piece, a lower triangle seat, a lower triangle, a needle selector, a sinker, a sinker triangle and a sinker, the needle disk is arranged on the upper side of the needle cylinder, the needle disk has an upper needle groove, the upper knitting needle is arranged in each upper needle groove, the upper knitting needle has a circle expansion piece, the upper triangle seat is arranged on the upper side of the needle disk, the upper triangle is arranged on the upper triangle seat, the upper triangle has an upper knitting needle track for the needle feet of the upper knitting needle to slide, the needle cylinder has a lower needle groove, the first lower knitting needle and the second lower knitting needle are arranged in the lower needle groove of the needle cylinder in sequence, and the The receiving needle is arranged at the lower side of the first lower knitting needle and is movably connected with the first lower knitting needle, the jacquard piece is arranged at the lower side of the receiving needle and is connected with the receiving needle, the needle selector is connected with the jacquard piece, the lower triangle seat is arranged at the outer side of the circumference of the needle cylinder, the lower triangle is arranged on the lower triangle seat, the lower triangle has the first lower knitting needle track, the second lower knitting needle track and the receiving needle track for the pins of the first lower knitting needle, the second lower knitting needle track and the receiving needle track for sliding, the sinker circle is arranged at the upper end of the needle cylinder, the sinker circle has a sinker groove, the sinker is arranged in each sinker groove, the sinker triangle is arranged on the upper side of the sinker circle, and the sinker triangle has a sinker track for the pins of the sinker to slide.

[0012] Furthermore, the knitting process of the circular knitting machine comprises the following steps: 1) The first lower knitting needle feeds the face yarn and forms a loop, and the upper knitting needle feeds the connecting yarn and forms a loop; 2) The needle selector moves the first lower and upper knitting needles to the first retraction height, and the old loops open their respective needle tongues; 3) After the upper knitting needle continues to move outward to complete the back loop, the first lower knitting needle moves downward so that the hook of the first lower knitting needle is flush with the back of the upper knitting needle; 4) The upper knitting needle continues to move outward, and the expanded loop is lifted upward to a position higher than the hook of the first lower knitting needle by using the loop expansion piece of the upper knitting needle. The first lower knitting needle moves upward, and the hook of the first lower knitting needle penetrates into the loop of the expanded upper knitting needle; 5) The upper knitting needle moves inward, the coil closes the needle tongue, the hook of the first lower knitting needle is separated from the opening at the top of the upper knitting needle expansion piece, and the coil of the upper knitting needle enters the hook of the first lower knitting needle; 6) After the first knitting needle continues to move downward and completes the retraction, the sinker moves forward to hang the loop on the first knitting needle on the throat of the sinker; 7) The first knitting needle continues to move upward, and the needle is closed after the veil is fed; 8) The sinker is further advanced to maintain the length of the veil, and at the same time, the loop hanging on the sinker is advanced to the back of the first lower needle, and at this time, the veil loop does not separate from the needle tongue; 9) The second knitting needle comes out, the bottom yarn is fed in and the needle is closed, and the length of the bottom yarn is ensured; 10) Place the bottom yarn on the belly of the sinker, the sinker moves back, the bottom yarn loop goes down from the nose of the sinker, and the second knitting needle continues to go down; 11) Lower the second lower needle further to tighten the belly of the sinker to ensure that the long yarn and bottom yarn are cast off.

[0013] By adopting the above-mentioned technical scheme, the beneficial effects of the present invention are as follows: the preparation process of the intelligent temperature-regulating fabric embeds phase-change microcapsules through matrix-distributed grooves to increase the heat exchange area, realize the synergistic effect of the temperature regulating layer and the grey cloth, and significantly improve the response speed and uniformity of the fabric to temperature changes. The surface layer and the bottom layer adopt a single-sided woven structure, and the middle layer is a double-sided woven hollow structure to form a stable three-dimensional breathable network to enhance the compression resistance and resilience of the fabric. At the same time, the temperature regulating layer is formed by mixing phase-change microcapsules with a polyurethane mesh structure and an adhesive in a mass ratio of 1:0.5 to 2 and then coating them, and embedding them in the grooves and the hollow structure, so that the phase-change microcapsules can be better compounded on the grey cloth. Furthermore, the double-sided woven middle layer forms a stable three-dimensional skeleton structure through connecting yarns, so that the peeling resistance of the surface layer and the bottom layer is increased to more than 25N / cm². The adaptive design of the groove depth and the thickness of the temperature regulating layer makes the phase-change microcapsules The contact area with the grey cloth is increased by 40%, and the adhesion rate of the phase change material is increased to 95%, which effectively avoids the phase separation problem caused by fiber shrinkage in the traditional blending process. In addition, the single-sided weaving structure of the surface layer and the double-sided middle layer work together to make the warp breaking strength of the fabric reach more than 450N, and the structural deformation rate is less than 3% after washing 50 times; at the same time, a 28-40 needle / inch circular knitting machine combined with jacquard needle selection technology is used to realize the one-time forming of the groove matrix during the weaving process, reducing the secondary processing steps of the traditional quilting process, and the production efficiency is increased by 3 times compared with the conventional process. By optimizing the coating parameters of the phase change microcapsule, that is, the coating speed is 1.5-3m / min, the curing temperature is 80-120℃, the material loss rate is reduced to less than 5%, and the standard deviation of the coating uniformity is controlled within 0.02mm. The process is adapted to the intelligent production system, which can realize the online monitoring of the coating accuracy of the temperature regulating layer, and the product qualification rate is increased to 98.6%. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of a circular knitting machine in an embodiment of the present invention; Figure 2 Schematic diagram of the coordination structure of the first lower knitting needle, the second lower knitting needle and the lower cam in an embodiment of the present invention; Figure 3 Schematic diagram of the matching structure of the upper knitting needle and the upper triangle in an embodiment of the present invention; Figure 4 It is a schematic diagram of the matching structure of the deposition plate and the sedimentation plate triangle in an embodiment of the present invention.

[0015] Description of reference numerals: 1. Needle plate; 2. Upper knitting needle; 3. Upper cam seat; 4. Upper cam; 5. Needle cylinder; 6. First lower knitting needle; 7. Second lower knitting needle; 8. Connecting needle; 9. Jacquard piece; 10. Lower cam seat; 11. Lower cam; 12. Needle selector; 13. Sinking circle; 14. Sinking plate cam; 15. Sinking plate; 16. Upper needle groove; 17. Lower needle groove; 18. Sinking groove; 20. Circle expansion piece; 41. upper knitting needle track; 111. first lower knitting needle track; 112. second lower knitting needle track; 113. receiving needle track; 141. sinker track. DETAILED DESCRIPTION

[0016] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0017] The embodiments of the present invention are: refer to Figures 1 to 4 As shown, a preparation process of an intelligent temperature-regulating fabric comprises a fabric body, wherein the fabric body comprises a grey cloth woven by a circular knitting machine and a temperature regulating layer arranged in the grey cloth, wherein the grey cloth comprises a surface layer, an intermediate layer and a bottom layer, wherein the surface layer comprises a surface yarn, the intermediate layer comprises a connecting yarn, and the bottom layer comprises a bottom yarn, wherein the surface layer and the bottom layer are single-sided knitted structures, and the intermediate layer is a double-sided knitted structure, wherein the surface layer and the bottom layer are connected by connecting yarns to form a hollow layer, wherein the surface layer and the intermediate layer are provided with matrix-distributed grooves, wherein the groove depth is 0.3 mm to 1 mm, preferably 0.2 mm, the width is 0.5 mm to 2 mm, preferably 0.8 mm, and the spacing between adjacent grooves is 3 mm to 8 mm, preferably 6 mm, wherein the temperature regulating layer is formed by coating a mixture of phase change microcapsules of a polyurethane mesh structure and an adhesive in a mass ratio of 1:0.5 to 2, preferably 1:1.2, and is embedded in the groove, and the thickness of the temperature regulating layer is 80 to 120%, preferably 100%, of the groove depth, and the adhesive is a polyurethane resin.

[0018] The preparation process of the intelligent temperature-regulating fabric embeds phase-change microcapsules in matrix-distributed grooves to increase the heat exchange area, realize the synergistic effect of the temperature regulating layer and the grey cloth, and significantly improve the response speed and uniformity of the fabric to temperature changes. The surface layer and the bottom layer adopt a single-sided woven structure, and the middle layer is a double-sided woven hollow structure to form a stable three-dimensional breathable network, which enhances the compression resistance and resilience of the fabric. At the same time, the temperature regulating layer is formed by mixing phase-change microcapsules with a polyurethane mesh structure and an adhesive in a mass ratio of 1:0.5 to 2 and then coating, and is embedded in the grooves and the hollow structure, so that the phase-change microcapsules can be better compounded on the grey cloth. Furthermore, the thickness of the temperature regulating layer is 80 to 120% of the depth of the groove, ensuring that the microcapsules are fully filled and tightly fit with the groove wall to avoid the microcapsules from falling off due to friction or bending, and the polyurethane resin adhesive has high chemical compatibility with the polyurethane shell layer of the phase-change microcapsules, and forms a cross-linked network after curing, thereby enhancing the water washing resistance of the temperature regulating layer.

[0019] Furthermore, the preparation process of the fabric body comprises the following steps: Step 1: Using a circular knitting machine, the needle density of the surface layer and the bottom layer is 28 to 40 needles per inch, the middle layer is connected to the surface layer and the bottom layer by connecting yarn to form a grey fabric with a hollow layer, and the grooves distributed in a matrix are formed by jacquard needle selection during the knitting process; Step 2: preparing phase change microcapsules with polyurethane network structure; Step 3: Mix the prepared polyurethane network structure phase change microcapsules with a binder in a mass ratio of 1:0.5-2, and evenly coat the mixture on the grey cloth; Step 4: Curing the coated fabric to ensure that the temperature regulating layer is firmly attached to the grey fabric layer; Step 5: According to the needs, the fabric body is subjected to finishing processes such as cutting and sewing to produce the final intelligent debugging fabric.

[0020] The above process can accurately control the density and depth of the groove distribution, ensure the matching degree between the temperature regulating layer and the grey cloth structure, improve product consistency, and integrate the grey cloth weaving, microcapsule preparation and coating processes in steps, simplify the production process, and be suitable for large-scale manufacturing. That is, the double-sided woven middle layer forms a stable three-dimensional skeleton structure through connecting yarns, so that the peeling strength between the surface layer and the bottom layer is increased to more than 25N / cm². The adaptive design of the groove depth and the thickness of the temperature regulating layer increases the contact area between the phase change microcapsule and the grey cloth by 40%, and the adhesion rate of the phase change material is increased to 95%, effectively avoiding the phase separation problem caused by fiber shrinkage in the traditional blending process. In addition, the single-sided weaving structure of the surface layer and the double-sided middle layer work together to form a stable three-dimensional skeleton structure. The warp breaking strength of the fabric can reach more than 450N, and the structural deformation rate is less than 3% after washing 50 times. At the same time, a circular knitting machine with 28 to 40 needles / inch is used in combination with jacquard needle selection technology to realize one-time forming of the groove matrix during the weaving process, reducing the secondary processing steps of the traditional quilting process. The production efficiency is increased by 3 times compared with the conventional process. By optimizing the coating parameters of the phase change microcapsule, that is, the coating speed is 1.5 to 3m / min, the curing temperature is 80 to 120℃, the material loss rate is reduced to less than 5%, and the standard deviation of the coating uniformity is controlled within 0.02mm. The process is adapted to the intelligent production system, which can realize online monitoring of the coating accuracy of the temperature regulating layer, and the product qualification rate is increased to 98.6%.

[0021] Furthermore, in the above step 2, the preparation process of the phase change microcapsules with polyurethane network structure includes the following steps: a. Prepare an oil phase medium solution: mix butyl stearate and isophorone diisocyanate in a mass ratio of 1:0.2 to form an oil phase; b. Prepare an aqueous medium solution: mix distilled water and styrene-maleic anhydride copolymer in a mass ratio of 4:0.05 to form an aqueous phase; c. Prepare emulsified suspension: Mix the oil phase medium solution and the water phase medium solution in a high-speed shear emulsifier at an emulsification speed of 9000 rpm for 10 minutes; d. Initiating polymerization reaction: adding triethanolamine to the emulsified suspension, the molar ratio of triethanolamine to isophorone diisocyanate being 0.5:1, the dropping time being 15 minutes, and after the dropping is complete, keeping the temperature at 40°C for 1.5 hours; e. Post-treatment: Raise the temperature to 65°C and keep it for 4 hours, then raise the temperature to 70°C and keep it for 2 hours, and finally raise the temperature to 80°C and keep it for 5 hours. After the reaction is completed, cool down and discharge the material to obtain phase change microcapsules with polyurethane network structure.

[0022] By increasing the temperature in stages and controlling the molar ratio of triethanolamine to isophorone diisocyanate to 0.5:1, a uniform polyurethane mesh shell layer is formed, the mechanical strength of the microcapsules is improved, and the temperature is adjusted.

[0023] At the same time, in the above step three, after the phase change microcapsules with a polyurethane network structure are mixed with the polyurethane resin, they are coated into the groove at a rate of 10 to 30 m / min by a slit coating method, and the coating pressure is 0.2 to 0.6 MPa. Preferably, in the above step three, after the phase change microcapsules with a polyurethane network structure are mixed with the polyurethane resin, they are coated into the groove at a rate of 18 m / min by a slit coating method, and the coating pressure is 0.5 MPa. The slit coating method is combined with a pressure of 0.2 to 0.6 MPa to ensure that the phase change microcapsules are accurately filled in the groove, to avoid coating overflow or cavity, to reduce material waste, and by setting the coating rate of 18 m / min and the coating pressure of 0.5 MPa, the coating speed and the uniformity of microcapsule distribution are optimized, taking into account both production efficiency and coating quality, so that the surface roughness is ≤5 μm.

[0024] At the same time, in the above step 4, the curing treatment is: first preheating at 50-70°C for 2-5 minutes to make the adhesive initially film-formed, then curing with ultraviolet light with a wavelength of 365nm and an intensity of 80-120mW / cm² for 5-30 seconds, and finally crosslinking under hot air at 120-150°C for 3-8 minutes. Preferably, in the above step 4, the curing treatment is: first preheating at 65°C for 4 minutes to make the adhesive initially film-formed, then curing with ultraviolet light with a wavelength of 365nm and an intensity of 110mW / cm² for 20 seconds, and finally crosslinking at 135°C. Crosslinking under hot air for 6 minutes, preheating to pre-crosslink the adhesive, UV curing to quickly set the surface, hot air crosslinking to strengthen the internal structure, shortening the total curing time by 30%, while avoiding the rupture of microcapsules caused by direct high temperature, and through specific 65℃ preheating for 4 minutes and UV curing with a wavelength of 365nm and an intensity of 110mW / cm² for 20 seconds, and finally crosslinking under hot air at 135℃ for 6 minutes, the adhesive crosslinking degree is ≥90%, and the microcapsule breakage rate is ≤2%, which significantly improves the mechanical properties and thermal cycle stability of the fabric.

[0025] In this embodiment, the circular knitting machine includes a needle disk 1, an upper knitting needle 2, an upper triangle seat 3, an upper triangle 4, a needle cylinder 5, a first lower knitting needle 6, a second lower knitting needle 7, a connecting needle 8, a jacquard piece 9, a lower triangle seat 10, a lower triangle 11, a needle selector 12, a sinker circle 13, a sinker triangle 14 and a sinker 15. The needle disk 1 is arranged on the upper side of the needle cylinder 5, and the needle disk 1 has an upper needle groove 16. The upper knitting needle 2 is arranged in each upper needle groove 16, and the upper knitting needle 2 has a circle expansion piece 20. The upper triangle seat 3 is arranged on the upper side of the needle disk 1, the upper triangle 4 is arranged on the upper triangle seat 3, the upper triangle 4 has an upper needle track 41 for the needle feet of the upper knitting needle 2 to slide, the needle cylinder 5 has a lower needle groove 17, the first lower knitting needle 6 and the second lower knitting needle 7 are arranged alternately in the lower needle groove 17 of the needle cylinder 5, the connecting needle 8 is arranged on the lower side of the first lower knitting needle 6 and is movably connected to the first lower knitting needle 6, the jacquard piece 9 is arranged on the lower side of the connecting needle 8 and is connected to the connecting needle 8, the needle selector 12 The lower triangle seat 10 is connected to the jacquard piece 9, and the lower triangle seat 10 is arranged outside the circumference of the needle cylinder 5. The lower triangle 11 is arranged on the lower triangle seat 10. The lower triangle 11 has a first lower needle track 111, a second lower needle track 112 and a receiving needle track 113 for sliding the pins of the first lower needle 6, the second lower needle 7 and the receiving needle 8. The sinker 13 is arranged at the upper end of the needle cylinder 5, and the sinker 13 has a sinker 18. The sinker 15 is arranged in each sinker 18. The sinker triangle 14 is arranged on the upper side of the sinker circle 13. The sinker triangle 14 has a sinker track 141 for the pins of the sinker 15 to slide. Through the coordinated design of the needle disk 1 and the needle cylinder 5, that is, the expansion plate 20 of the upper knitting needle 2 is positioned with the throat of the sinker 15, it is ensured that the tension of the surface layer, the middle layer and the bottom layer yarns is consistent, the yarn breakage rate is reduced, and the surface flatness of the grey cloth is improved. The sinker triangle and the needle joint control the coil density to form a breathable structure with an air permeability of ≥3000mm / s.

[0026] Furthermore, the knitting process of the circular knitting machine comprises the following steps: 1) The first lower knitting needle 6 is fed with the face yarn to form a loop, and the upper knitting needle 2 is fed with the connecting yarn to form a loop; 2) The needle selector 12 moves the first lower knitting needle 6 and the upper knitting needle 2 to the first retraction height, and the old loops open their respective needle tongues; 3) After the upper knitting needle 2 continues to move outward to complete the back loop, the first lower knitting needle 6 moves downward so that the hook of the first lower knitting needle 6 is flush with the back of the upper knitting needle 2; 4) The upper knitting needle 2 continues to move outward, and the expanded loop is lifted upward to a position higher than the hook of the first lower knitting needle 6 by using the loop expansion piece 20 of the upper knitting needle 2. The first lower knitting needle 6 moves upward, and the hook of the first lower knitting needle 6 penetrates into the expanded loop of the upper knitting needle 2; 5) The upper knitting needle 2 moves inward, the coil closes the needle tongue, the hook of the first lower knitting needle 6 is disengaged from the opening at the upper part of the expansion piece 20 of the upper knitting needle 2, and the coil of the upper knitting needle 2 enters the hook of the first lower knitting needle; 6) After the first lower knitting needle 6 continues to move downward and completes the backing, the sinker 15 advances to hang the loop on the first lower knitting needle 6 on the throat of the sinker 15; 7) The first lower knitting needle 6 continues to move upward, feeding the yarn and then closing the needle; 8) Further advancing the sinker 15 to maintain the length of the yarn, and at the same time, the loop hanging on the sinker 15 is advanced to the back of the first lower knitting needle 6, and at this time, the yarn loop does not separate from the needle tongue; 9) The second lower knitting needle 7 is brought out, the bottom yarn is fed in and the needle is closed, and the length of the bottom yarn is ensured; 10) Place the bottom yarn on the belly of the sinker, the sinker moves back, the bottom yarn loop goes down from the nose of the sinker 15, and the second lower knitting needle 7 continues to descend; 11) The second lower knitting needle 7 is further lowered to tighten the belly of the sinker to ensure that the long face yarn and the bottom yarn are cast off.

[0027] Through step-by-step yarn feeding and sinker 15 advancement control, the consistency of the length of the surface and bottom layer coils is ensured to avoid curling or deformation of the fabric; and through the sinker 15 belly positioning and tensioning process, the surface yarn and bottom yarn are simultaneously unhooked, improving the weaving efficiency and the edge strength of the fabric.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes may be made to the present invention in form and details without departing from the spirit and scope of the present invention as defined by the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A preparation process of an intelligent temperature regulating fabric, characterized in that: The invention comprises a fabric body, and the preparation process of the fabric body comprises the following steps: Step 1: Using a circular knitting machine, the needle density of the surface layer and the bottom layer is 28 to 40 needles per inch, the middle layer is connected to the surface layer and the bottom layer by connecting yarn to form a grey fabric with a hollow layer, and the grooves distributed in a matrix are formed by jacquard needle selection during the knitting process; Step 2: preparing phase change microcapsules with polyurethane network structure; Step 3: Mix the prepared polyurethane network structure phase change microcapsules with a binder in a mass ratio of 1:0.5-2, and evenly coat the mixture on the grey cloth; Step 4: Curing the coated fabric to ensure that the temperature regulating layer is firmly attached to the grey fabric layer; Step 5: According to the needs, the fabric body is subjected to post-finishing process to make intelligent debugging fabric.

2. The preparation process of the intelligent temperature regulating fabric according to claim 1, characterized in that: The preparation process of the phase-change microcapsules with polyurethane network structure in the above step 2 comprises the following steps: a. Prepare an oil phase medium solution: mix butyl stearate and isophorone diisocyanate in a mass ratio of 1:0.2 to form an oil phase; b. Prepare an aqueous medium solution: mix distilled water and styrene-maleic anhydride copolymer in a mass ratio of 4:0.05 to form an aqueous phase; c. Prepare emulsified suspension: Mix the oil phase medium solution and the water phase medium solution in a high-speed shear emulsifier at an emulsification speed of 9000 rpm for 10 minutes; d. Initiating polymerization reaction: adding triethanolamine to the emulsified suspension, the molar ratio of triethanolamine to isophorone diisocyanate being 0.5:1, the dropping time being 15 minutes, and after the dropping is complete, keeping the temperature at 40°C for 1.5 hours; e. Post-treatment: Raise the temperature to 65°C and keep it for 4 hours, then raise the temperature to 70°C and keep it for 2 hours, and finally raise the temperature to 80°C and keep it for 5 hours. After the reaction is completed, cool down and discharge the material to obtain phase change microcapsules with polyurethane network structure.

3. The preparation process of the intelligent temperature regulating fabric according to claim 1 or 2, characterized in that: The adhesive is polyurethane resin.

4. The preparation process of the intelligent temperature regulating fabric according to claim 3, characterized in that: In the above step three, after the polyurethane network structure phase change microcapsules are mixed with the polyurethane resin, they are coated into the grooves at a rate of 10 to 30 m / min using a slit coating method, and the coating pressure is 0.2 to 0.6 MPa.

5. The preparation process of the intelligent temperature regulating fabric according to claim 4, characterized in that: In the above step three, after the polyurethane network structure phase change microcapsules are mixed with the polyurethane resin, they are coated into the grooves by a slit coating method at a rate of 18 m / min and a coating pressure of 0.5 MPa.

6. The preparation process of the intelligent temperature regulating fabric according to claim 3, characterized in that: In the above step 4, the curing treatment is: first preheat at 50-70°C for 2-5 minutes to allow the adhesive to initially form a film, then cure with ultraviolet light at a wavelength of 365nm and an intensity of 80-120mW / cm² for 5-30 seconds, and finally crosslink under hot air at 120-150°C for 3-8 minutes.

7. The preparation process of the intelligent temperature regulating fabric according to claim 6, characterized in that: In the above step 4, the curing treatment is: first preheat at 65°C for 4 minutes to allow the adhesive to initially form a film, then cure with ultraviolet light at a wavelength of 365nm and an intensity of 110mW / cm² for 20 seconds, and finally crosslink under hot air at 135°C for 6 minutes.

8. The preparation process of the intelligent temperature regulating fabric according to claim 1, characterized in that: The circular knitting machine comprises a needle disc, an upper knitting needle, an upper triangle seat, an upper triangle, a needle cylinder, a first lower knitting needle, a second lower knitting needle, a connecting needle, a jacquard piece, a lower triangle seat, a lower triangle, a needle selector, a sinker, a sinker triangle and a sinker. The needle disc is arranged on the upper side of the needle cylinder. The needle disc has an upper needle groove. The upper knitting needle is arranged in each upper needle groove. The upper knitting needle has a circle expansion piece. The upper triangle seat is arranged on the upper side of the needle disc. The upper triangle is arranged on the upper triangle seat. The upper triangle has an upper knitting needle track for sliding the pins of the upper knitting needles. The needle cylinder has a lower needle groove. The first lower knitting needle and the second lower knitting needle are arranged alternately in the lower needle groove of the needle cylinder in sequence. The connecting needle It is arranged at the lower side of the first lower knitting needle and is movably connected with the first lower knitting needle, the jacquard piece is arranged at the lower side of the connecting needle and is connected with the connecting needle, the needle selector is connected with the jacquard piece, the lower triangular seat is arranged at the outer side of the circumference of the needle cylinder, the lower triangle is arranged on the lower triangular seat, the lower triangle has the first lower knitting needle track, the second lower knitting needle track and the connecting needle track for the stitches of the first lower knitting needle, the second lower knitting needle track and the connecting needle track for sliding, the sinker circle is arranged at the upper end of the needle cylinder, the sinker circle has a sinker groove, the sinker is arranged in each sinker groove, the sinker triangle is arranged on the upper side of the sinker circle, and the sinker triangle has a sinker track for the stitches of the sinker to slide.

9. The preparation process of the intelligent temperature regulating fabric according to claim 8, characterized in that: The knitting process of the circular knitting machine comprises the following steps: 1) The first lower knitting needle feeds the face yarn and forms a loop, and the upper knitting needle feeds the connecting yarn and forms a loop; 2) The needle selector moves the first lower and upper knitting needles to the first retraction height, and the old loops open their respective needle tongues; 3) After the upper knitting needle continues to move outward to complete the back loop, the first lower knitting needle moves downward so that the hook of the first lower knitting needle is flush with the back of the upper knitting needle; 4) The upper knitting needle continues to move outward, and the expanded loop is lifted upward to a position higher than the hook of the first lower knitting needle by using the loop expansion piece of the upper knitting needle. The first lower knitting needle moves upward, and the hook of the first lower knitting needle penetrates into the loop of the expanded upper knitting needle; 5) The upper knitting needle moves inward, the coil closes the needle tongue, the hook of the first lower knitting needle is separated from the opening at the top of the upper knitting needle expansion piece, and the coil of the upper knitting needle enters the hook of the first lower knitting needle; 6) After the first knitting needle continues to move downward and completes the retraction, the sinker moves forward to hang the loop on the first knitting needle on the throat of the sinker; 7) The first knitting needle continues to move upward, and the needle is closed after the veil is fed; 8) The sinker is further advanced to maintain the length of the veil, and at the same time, the loop hanging on the sinker is advanced to the back of the first lower needle, and at this time, the veil loop does not separate from the needle tongue; 9) The second knitting needle comes out, the bottom yarn is fed in and the needle is closed, and the length of the bottom yarn is ensured; 10) Place the bottom yarn on the belly of the sinker, the sinker moves back, the bottom yarn loop goes down from the nose of the sinker, and the second knitting needle continues to go down; 11) Lower the second lower needle further to tighten the belly of the sinker to ensure that the long yarn and bottom yarn are cast off.

Images