Preparation process of single-suction and single-protection fabric

Abstract

The application relates to the field of textile fabrics, in particular to a preparation process of single-suction single-proof fabric, which mainly solves the problems of poor structural stability, poor air permeability and low wet conducting efficiency of the single-suction single-proof fabric in the prior art, and comprises the following steps: step one, material preparation: including hydrophilic yarn, water-repellent yarn and connecting yarn; step two, weaving process: the hydrophilic yarn, the water-repellent yarn and the connecting yarn are introduced into a disc knitting device to weave into a gray cloth, the disc knitting device comprises first upper knitting needles, second upper knitting needles, first lower knitting needles and second lower knitting needles; and step three, post-finishing process: the gray cloth is placed into a setting machine, the temperature of the setting machine is controlled to be 160 DEG C to 180 DEG C, and the time is 30-60 seconds, so that the fabric size is stabilized and the yarn function is maintained.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of textile fabrics, in particular to a preparation process of single absorption and single waterproof fabric. BACKGROUND

[0002] Most of the existing one-way moisture-conducting fabric adopts a multi-layer composite structure, and then is subjected to post-processing to form a single absorption and single waterproof fabric. For example, CN101694063B discloses a finishing method of single absorption and single waterproof fabric, which comprises the following process steps: (1) water absorption finishing: the dyed fabric is soaked in a hydrophilic finishing liquid for 5-15 minutes, the soaking temperature is room temperature, the bath ratio is 1:10-50, the pH value of the hydrophilic finishing liquid is 4.5-5, the hydrophilic finishing liquid contains 10-20 g / L of hydrophilic auxiliary agent and the rest is water; the soaked fabric is subjected to pad-dry treatment at a pressure of 3-7 kg / cm2 and a pick-up rate of 70-80%; and the pad-dry treated fabric is dried at 130-160°C; (2) waterproof finishing: the front surface of the fabric subjected to the water absorption finishing in step (1) is coated with a waterproof finishing liquid on a rotary screen printing machine at a temperature of 150-170°C for 1-2 minutes; the waterproof finishing liquid comprises, by weight, 140-160 parts of Rudolf fluorocarbon resin FC-9005, 9-11 parts of Rudolf crosslinking agent FX-8005, and 800-850 parts of Rudolf thickening agent TH-5000; and the dyed fabric is subjected to one soaking and one padding in the hydrophilic finishing liquid, and then one surface of the fabric is coated with the waterproof finishing liquid on the rotary screen printing machine, so that the inner layer of the fabric has a water absorption effect.

[0003] However, the above-mentioned single absorption and single waterproof fabric has some problems: the adhesive blocks the gap between the fibers, hinders the transfer of moisture, and the interlayer is prone to peeling, resulting in moisture-conducting failure; the composite process makes the fabric thick and heavy, and it is prone to delamination after repeated washing; in addition, the high-density waterproof layer is prone to heat, and the low-density moisture-conducting layer is prone to water penetration. SUMMARY

[0004] Therefore, in view of the above problems, the present application provides a preparation process of single absorption and single waterproof fabric, which mainly solves the problems of poor structural stability, poor air permeability and low moisture-conducting efficiency of the single absorption and single waterproof fabric in the prior art.

[0005] To achieve the above-mentioned purposes, the present application adopts the following technical solutions:

[0006] A preparation process of single absorption and single waterproof fabric, comprising the following steps:

[0007] Step 1: material preparation: including hydrophilic yarn, water-repellent yarn and connecting yarn;

[0008] Step two: weaving process: hydrophilic yarn, water repellent yarn and connecting yarn are introduced into the disc knitting device to weave into the gray cloth, the disc knitting device includes first upper needle, second upper needle, first lower needle and second lower needle, the knitting method of the disc knitting device is:

[0009] a. The first upper needle and the second upper needle are out of needle, respectively feeding the hydrophilic yarn and the connecting yarn, and bending the yarn into a loop, the first lower needle and the second lower needle are in the floating state;

[0010] b. The first lower needle and the second lower needle are out of needle, feeding the water repellent yarn, and bending the yarn into a loop, the first upper needle and the second upper needle are in the floating state;

[0011] c. The first upper needle is in the tuck state, the second upper needle is in the floating state, the first lower needle is in the tuck state, and the second lower needle is in the floating state;

[0012] d. The first upper needle and the second upper needle are out of needle, feeding the hydrophilic yarn, and bending the yarn into a loop, the first lower needle and the second lower needle are in the floating state;

[0013] e. The first lower needle and the second lower needle are out of needle, feeding the water repellent yarn, and bending the yarn into a loop, the first upper needle and the second upper needle are in the floating state;

[0014] f. The first upper needle is in the floating state, the second upper needle is in the tuck state, the first lower needle is in the floating state, and the second lower needle is in the tuck state;

[0015] The gray cloth includes a waterproof layer and a water absorption layer, the waterproof layer covers the water absorption layer, the water absorption layer includes hydrophilic yarn and connecting yarn, the waterproof layer includes water repellent yarn, the water repellent yarn covers the water repellent yarn, the waterproof layer and the water absorption layer both have mesh, the mesh of the waterproof layer and the mesh of the water absorption layer are staggered, the connecting yarn is distributed at the mesh of the water absorption layer, and the hydrophilic yarn is distributed at the mesh of the waterproof layer.

[0016] Step three: finishing process: the gray cloth is put into the setting machine, the temperature of the setting machine is controlled at 160-180℃, and the time is 30-60 seconds, so as to stabilize the fabric size and keep the yarn function.

[0017] Further, the feeding tension of the hydrophilic yarn in the disc knitting device is 15-20 cN, the feeding tension of the water repellent yarn is 15.5-20.5 cN, the weaving density is 20-25 needles / inch, the bending depth is controlled at 0.5-0.8 mm, and the knitting speed is 18-22 rpm.

[0018] Further, the yarn arrangement ratio of the waterproof layer to the water absorption layer is 1:1.2-1:1.5.

[0019] Further, the hydrophilic yarn is modified polyester filament, and the hydrophilic property is obtained by polyurethane hydrophilic finishing agent treatment, and the contact angle is less than or equal to 30°.

[0020] Further, the hydrophilic yarn in step one needs to be pretreated, including sequentially using a solution of ethyl ether and acetone mixed at a volume ratio of 1:1 for ultrasonic cleaning, the ultrasonic frequency is 40 kHz, the time is 10-15 minutes, the surface oil and impurities are removed, then the fiber surface is treated by soaking in an acetic acid solution with a mass concentration of 5% for 20-30 minutes, the bath ratio is 1:20, the temperature is controlled at 45-50°C, the activity of the polar group on the fiber surface is enhanced, finally the fiber is washed to neutral with deionized water, and then dried in a hot air oven at 80-85°C until the moisture content is less than or equal to 2%, and the fiber elongation at break is less than or equal to 20%.

[0021] Further, the disc knitting device further comprises a needle disc, an upper cam seat, an upper cam, a needle cylinder, a lower cam seat, a lower cam, and a jet assembly, the needle disc is arranged on the upper side of the needle cylinder, the needle disc has upper needle grooves, the first upper knitting needles and the second upper knitting needles are arranged in the upper needle grooves of the needle disc in turn, the upper cam seat is arranged on the upper side of the needle disc, the upper cam is arranged on the upper cam seat, the upper cam has first upper knitting needle tracks and second upper knitting needle tracks for the heel of the first upper knitting needle and the heel of the second upper knitting needle to slide, the needle cylinder has lower needle grooves, the first lower knitting needles and the second lower knitting needles are arranged in the lower needle grooves of the needle cylinder in turn, the lower cam seat is arranged on the outer side of the circumference of the needle cylinder, the lower cam is arranged on the lower cam seat, the lower cam has first lower knitting needle tracks and second lower knitting needle tracks for the heel of the first lower knitting needle and the heel of the second lower knitting needle to slide, the jet assembly is arranged on the upper cam seat, the jet assembly has jet nozzles, the jet nozzles are distributed between the needle disc and the needle cylinder, and the included angle between the central axis of the jet nozzles and the horizontal plane is 65°-72°.

[0022] Further, the first upper knitting needle tracks include a first loop forming groove, a first flat knitting groove, a first tuck groove, a second loop forming groove, a second flat knitting groove, and a third flat knitting groove in turn.

[0023] Further, the second upper knitting needle tracks include a third loop forming groove, a fourth flat knitting groove, a fifth flat knitting groove, a fourth loop forming groove, a sixth flat knitting groove, and a second tuck groove in turn.

[0024] Further, the first lower knitting needle tracks include a seventh flat knitting groove, a fifth loop forming groove, a third tuck groove, an eighth flat knitting groove, a sixth loop forming groove, and a ninth flat knitting groove in turn.

[0025] Further, the second lower knitting needle tracks include a tenth flat knitting groove, a seventh loop forming groove, an eleventh flat knitting groove, a twelfth flat knitting groove, an eighth loop forming groove, and a fourth tuck groove in turn.

[0026] By adopting the above-mentioned technical scheme, the beneficial effects of the present invention are as follows: the preparation process of the single-absorbent and single-proof fabric, through the alternating looping action of the disc knitting device, simultaneously forms a waterproof layer and a water-absorbing layer in a single weaving, and distributes the connecting yarn in the mesh of the water-absorbing layer, and the hydrophilic yarn is embedded in the mesh of the waterproof layer to form mesh interlocking, thereby enhancing the bonding force between the layers, and can be firmly bonded without adhesives, avoiding the risk of stratification in the lamination process, and improving the stability of the fabric structure. Furthermore, the mesh holes are staggered to form capillary channels, which accelerates the directional migration of moisture from the waterproof layer to the water-absorbing layer, thereby achieving efficient moisture conduction. At the same time, the gradient density design takes into account both waterproofness and breathability, and the heat setting process fixes the yarn shape to prevent moisture conduction failure caused by mesh deformation after washing. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic cross-sectional view of a circular knitting device according to an embodiment of the present invention;

[0028] Figure 2 Schematic diagram of the distribution structure of the first upper knitting needle, the second upper knitting needle and the upper triangle in an embodiment of the present invention;

[0029] Figure 3 Schematic diagram of the distribution structure of the first lower knitting needle, the second lower knitting needle and the lower triangle in an embodiment of the present invention;

[0030] Figure 4 Schematic diagram of the configuration structure of the upper triangle and the lower triangle in an embodiment of the present invention;

[0031] Figure 5 2 is a structural diagram of the fabric in an embodiment of the present invention.

[0032] Description of reference numerals:

[0033] 1. Circular knitting device; 11. First upper knitting needle; 12. Second upper knitting needle; 13. First lower knitting needle; 14. Second lower knitting needle; 15. Needle disc; 16. Upper cam seat; 17. Upper cam; 18. Needle cylinder; 19. Lower cam seat; 20. Lower cam; 21. Air jet assembly;

[0034] 151, upper needle groove; 171, first upper knitting needle track; 172, second upper knitting needle track; 181, lower needle groove; 201, first lower knitting needle track; 202, second lower knitting needle track; 211, air jet;

[0035] 301, first tucking groove; 302, first flat knitting groove; 303, first collecting groove; 304, second tucking groove; 305, second flat knitting groove; 306, third flat knitting groove; 401, third tucking groove; 402, fourth flat knitting groove; 403, fifth flat knitting groove; 404, fourth tucking groove; 405, sixth flat knitting groove; 406, second collecting groove; 501, seventh flat knitting groove; 502, fifth tucking groove; 503, third collecting groove; 504, eighth flat knitting groove; 505, sixth tucking groove; 506, ninth flat knitting groove; 601, tenth flat knitting groove; 602, seventh tucking groove; 603, eleventh flat knitting groove; 604, twelfth flat knitting groove; 605, eighth tucking groove; 606, fourth collecting groove. DETAILED DESCRIPTION

[0036] The application will be further described in conjunction with the drawings and specific embodiments.

[0037] The embodiments of the application are:

[0038] Referring to Figures 1 to 5 As shown in the drawings, a preparation process of a single-suction single-protection fabric includes the following steps:

[0039] Step one: material preparation: including hydrophilic yarn, water-repellent yarn and connecting yarn, the connecting yarn is cotton yarn;

[0040] Step two: weaving process: the hydrophilic yarn, water-repellent yarn and connecting yarn are introduced into a disc knitting device to weave into a gray fabric, the disc knitting device 1 includes a first upper knitting needle 11, a second upper knitting needle 12, a first lower knitting needle 13 and a second lower knitting needle 14, and the weaving mode of the disc knitting device 1 is:

[0041] a, the first upper knitting needle 11 and the second upper knitting needle 12 are out of the needle, respectively feeding the hydrophilic yarn and the connecting yarn, and bending the yarn to form a loop, the first lower knitting needle 13 and the second lower knitting needle 14 are in a floating state;

[0042] b, the first lower knitting needle 13 and the second lower knitting needle 14 are out of the needle, feeding the water-repellent yarn, and bending the yarn to form a loop, the first upper knitting needle 11 and the second upper knitting needle 12 are in a floating state;

[0043] c, the first upper knitting needle 11 is in a tucking state, the second upper knitting needle 12 is in a floating state, the first lower knitting needle 13 is in a tucking state, and the second lower knitting needle 14 is in a floating state;

[0044] d, the first upper knitting needle 11 and the second upper knitting needle 12 are out of the needle, feeding the hydrophilic yarn, and bending the yarn to form a loop, the first lower knitting needle 13 and the second lower knitting needle 14 are in a floating state;

[0045] e. The first lower knitting needle 13 and the second lower knitting needle 14 are out of needle, the water-repellent yarn is fed in, and the yarn is bent into a loop, the first upper knitting needle 11 and the second upper knitting needle 12 are in a floating state;

[0046] f. The first upper knitting needle 11 is in a floating state, the second upper knitting needle 12 is in a tuck state, the first lower knitting needle 13 is in a floating state, and the second lower knitting needle 14 is in a tuck state;

[0047] The base cloth comprises a waterproof layer and a water-absorbing layer, the waterproof layer covers the water-absorbing layer, the water-absorbing layer comprises hydrophilic yarn and connecting yarn, the waterproof layer comprises water-repellent yarn, the water-repellent yarn covers the water-repellent yarn, the waterproof layer and the water-absorbing layer both have mesh holes, the mesh holes of the waterproof layer and the mesh holes of the water-absorbing layer are staggered, the connecting yarn is distributed at the mesh holes of the water-absorbing layer, and the hydrophilic yarn is distributed at the mesh holes of the waterproof layer.

[0048] Step three: post-finishing process: put the base cloth into the setting machine, control the temperature of the setting machine at 160-180 DEG C, preferably 175 DEG C, and the time is 30-60 seconds, preferably 45 seconds, to stabilize the fabric size and keep the yarn function.

[0049] The preparation process of the single water absorption and single waterproof fabric forms the waterproof layer and the water-absorbing layer synchronously in a single weaving through the alternating loop formation action of the disc knitting device, and the connecting yarn is distributed at the mesh holes of the water-absorbing layer, and the hydrophilic yarn is embedded in the mesh holes of the waterproof layer to form mesh hole interlocking and enhance the interlayer bonding force, so that firm combination can be achieved without adhesive, the delamination risk of the lamination process is avoided, the stability of the fabric structure is improved, furthermore, the mesh holes are staggered to form capillary channels, the directional migration of water from the waterproof layer to the water-absorbing layer is accelerated, efficient moisture conduction is realized, the gradient density design takes into account the waterproofness and air permeability, and the heat setting process fixes the yarn shape to prevent the moisture conduction failure caused by the deformation of the mesh holes after washing.

[0050] Furthermore, the feeding tension of the hydrophilic yarn in the disc knitting device 1 is 15-20 cN, preferably 17.5 cN, the feeding tension of the water-repellent yarn is 15.5-20.5 cN, preferably 18 cN, the weaving density is 20-25 needles / inch, preferably 25 needles / inch, the bending depth is controlled at 0.5-0.8 mm, preferably 0.6 mm, the balance of the density of the waterproof layer and the yarn strength, and the weaving speed is 18-22 rpm, preferably 20 rpm, which matches the high-density weaving requirement and reduces the risk of needle skipping.

[0051] Further, the yarn arrangement ratio of the waterproof layer to the water-absorbing layer is 1:1.2-1:1.5, preferably 1:1.4, the water pressure potential difference is formed through the density advantage of the waterproof layer yarn to drive the one-way transmission of water.

[0052] Specifically, the hydrophilic yarn is modified polyester filament, and the hydrophilic property is obtained by polyurethane hydrophilic finishing agent treatment, the contact angle is ≤30°, the polyurethane finishing agent gives the modified polyester filament a low contact angle, enhances the capillary effect of the water absorption layer, and the chemical bonding type finishing agent ensures that the hydrophilic property remains stable after 50 washes. Specifically, the hydrophilic yarn in step one needs to be pretreated, including ultrasonic cleaning with a solution of ethyl ether and acetone mixed at a volume ratio of 1:1, ultrasonic frequency 40 kHz, time 12 minutes, to remove surface oil and impurities, then soaked in a 5% acetic acid solution for 25 minutes, bath ratio 1:20, temperature controlled at 48°C, to enhance the activity of the polar groups on the fiber surface, finally washed with deionized water to neutral, dried in a hot air oven at 80°C to a moisture content of ≤2%, and the fiber elongation at break is ≤20%, the ethyl ether and acetone mixed solution ultrasonic cleaning removes oil impurities to avoid affecting the adsorption of the hydrophilic finishing agent, and the acetic acid solution soaking exposes the carboxyl groups on the fiber surface, enhancing the chemical bonding strength with the hydrophilic finishing agent, and low-temperature drying controls the fiber moisture content to ≤2% to prevent high-temperature heat damage leading to excessive elongation at break.

[0053] In the embodiment, the disc knitting device 1 further comprises a needle disc 15, an upper cam seat 16, an upper cam 17, a needle cylinder 18, a lower cam seat 19, a lower cam 20, and a jet assembly 21. The needle disc 15 is arranged on the upper side of the needle cylinder 18, and has upper needle grooves 151. The first upper knitting needles 11 and the second upper knitting needles 12 are arranged in the upper needle grooves 151 of the needle disc 15 in an alternating manner. The upper cam seat 16 is arranged on the upper side of the needle disc 15, and the upper cam 17 is arranged on the upper cam seat 16. The upper cam 17 has first upper knitting needle tracks 171 and second upper knitting needle tracks 172 for the heel of the first upper knitting needles 11 and the heel of the second upper knitting needles 12 to slide. The needle cylinder 18 has lower needle grooves 181, and the first lower knitting needles 13 and the second lower knitting needles 14 are arranged in the lower needle grooves 181 of the needle cylinder 18 in an alternating manner. The lower cam seat 19 is arranged on the outer side of the circumference of the needle cylinder 18, and the lower cam 20 is arranged on the lower cam seat 19. The lower cam 20 has first lower knitting needle tracks 201 and second lower knitting needle tracks 202 for the heel of the first lower knitting needles 13 and the heel of the second lower knitting needles 14 to slide. The jet assembly 21 is arranged on the upper cam seat 16, and has jet nozzles 211. The jet nozzles 211 are distributed between the needle disc 15 and the needle cylinder 18, and the included angle between the central axis of the jet nozzles 211 and the horizontal plane is 65°-72°, preferably 70°. The upper / lower cam tracks drive the knitting needles to form loops, tuck stitches, and float stitches in stages, realize the alternating knitting of the waterproof layer and the water absorption layer, and the inclination angle of the jet nozzles 211 is 65°-72° to optimize the airflow direction, reduce the interference of fly accumulation on the yarn tension, and ensure the presentation of the waterproof layer and the water absorption layer mesh.

[0054] Further, the first upper needle track 171 comprises a first loop slot 301, a first flat knitting slot 302, a first tuck slot 303, a second loop slot 304, a second flat knitting slot 305 and a third flat knitting slot 306 in sequence; the second upper needle track 172 comprises a third loop slot 401, a fourth flat knitting slot 402, a fifth flat knitting slot 403, a fourth loop slot 404, a sixth flat knitting slot 405 and a second tuck slot 406 in sequence; the first lower needle track 201 comprises a seventh flat knitting slot 501, a fifth loop slot 502, a third tuck slot 503, an eighth flat knitting slot 504, a sixth loop slot 505 and a ninth flat knitting slot 506 in sequence; the second lower needle track 202 comprises a tenth flat knitting slot 601, a seventh loop slot 602, an eleventh flat knitting slot 603, a twelfth flat knitting slot 604, an eighth loop slot 605 and a fourth tuck slot 606 in sequence, ensuring smooth transition of yarn tension during alternating looping, avoiding yarn overload and breakage at tuck positions.

[0055] Meanwhile, the waterproof layer has a mesh density of 120-150 holes / cm2, preferably 120 holes / cm2, and a pore size of 0.1-0.3 mm, preferably 0.2 mm, which can block the penetration of liquid water while allowing the passage of gaseous water molecules; the water absorption layer has a mesh density of 80-100 holes / cm2, preferably 80 holes / cm2, and a pore size of 0.5-0.8 mm, preferably 0.6 mm, forming wider capillary channels to accelerate water diffusion, and the mesh interlacing angles of the two layers are 45°-60°, preferably 60°, increasing the interlayer contact points, improving the shear resistance, avoiding interlayer slip due to differences in yarn density, and making the structure balanced.

[0056] In this embodiment, the water-repellent yarn is a water-repellent polyester yarn, the surface of which is modified by perfluorinated compounds, with a contact angle ≥ 150°. The specific process is as follows: the surface of the polyester yarn is modified by plasma with a power of 300-500 W under normal pressure, and the treatment time is 5-10 min, which removes impurities and introduces amino polyethylene glycol hydroxyl groups to enhance the subsequent chemical grafting capacity. Then, a block copolymer is generated by esterification reaction of perfluoropolyether carboxylic acid and polycaprolactone, which enhances the hydrophobicity by using the low surface energy property. Then, the perfluoropolyether modified polycaprolactone is dissolved in an organic solvent, and a porous microsphere coating is formed on the surface of the yarn by electrostatic spraying technology, with a voltage of 15-20 kV, a solution concentration of 8-12 wt%, and a spraying distance of 15-20 cm. The roughness is increased to improve the contact angle, and the coating is dried at 120-150°C for 30-60 min to promote the chemical bonding between the perfluorinated compound and the polyester fiber, ensuring the durability of the coating.

[0057] In addition, the terms "first", "second", etc. are used only to describe the purpose and are not to be interpreted as indicating or implying relative importance or a specific number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0058] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0059] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0060] Although the present application is specifically shown and introduced in combination with the preferred embodiments, those skilled in the art should understand that various changes can be made to the present application in form and detail without departing from the spirit and scope of the present application defined by the appended claims, and all such changes are within the protection scope of the present application.

Claims

1. A process for the preparation of a single face single barrier fabric, characterized in that: The method comprises the following steps: Step 1: material preparation: including hydrophilic yarn, water repellent yarn and connecting yarn; The water repellent yarn is water repellent polyester yarn, the surface of which is modified by perfluorinated compound, the contact angle is greater than or equal to 150°, and the specific process is as follows: the surface of the polyester yarn is modified by plasma with a power of 300-500 W under normal pressure, the treatment time is 5-10 min, impurities are removed and amino polyethylene glycol hydroxyl is introduced to enhance the subsequent chemical grafting ability, and then a block copolymer is formed by esterification reaction of perfluoropolyether carboxylic acid and polycaprolactone to enhance the hydrophobicity by using the low surface energy characteristics, then the perfluoropolyether modified polycaprolactone is dissolved in an organic solvent, a porous microsphere coating is formed on the surface of the yarn by electrostatic spraying technology, the voltage is 15-20 kV, the solution concentration is 8-12 wt%, the spraying distance is 15-20 cm, the roughness is increased to improve the contact angle, and the yarn is dried at 120-150°C for 30-60 min; Step 2: weaving process: the hydrophilic yarn, water repellent yarn and connecting yarn are introduced into a disc knitting device to weave into a gray fabric, the disc knitting device comprises a first upper needle, a second upper needle, a first lower needle, a second lower needle, a needle disc, an upper cam seat, an upper cam, a needle cylinder, a lower cam seat, a lower cam and an air jet assembly, the needle disc is arranged on the upper side of the needle cylinder, the needle disc is provided with an upper needle groove, the first upper needle and the second upper needle are arranged in the upper needle groove of the needle disc in an interlaced manner, the upper cam seat is arranged on the upper side of the needle disc, the upper cam is arranged on the upper cam seat, the upper cam is provided with a first upper needle rail and a second upper needle rail for sliding of the needle butt of the first upper needle and the needle butt of the second upper needle, the needle cylinder is provided with a lower needle groove, the first lower needle and the second lower needle are arranged in the lower needle groove of the needle cylinder in an interlaced manner, the lower cam seat is arranged on the outer side of the circumference of the needle cylinder, the lower cam is arranged on the lower cam seat, the lower cam is provided with a first lower needle rail and a second lower needle rail for sliding of the needle butt of the first lower needle and the needle butt of the second lower needle, the air jet assembly is arranged on the upper cam seat, the air jet assembly is provided with air jet nozzles, the air jet nozzles are distributed between the needle disc and the needle cylinder, the included angle between the central axis of the air jet nozzles and the horizontal plane is 65°-72°, the first upper needle rail comprises a first loop forming groove, a first flat knitting groove, a first tuck groove, a second loop forming groove, a second flat knitting groove and a third flat knitting groove in sequence, the second upper needle rail comprises a third loop forming groove, a fourth flat knitting groove, a fifth flat knitting groove, a fourth loop forming groove, a sixth flat knitting groove and a second tuck groove in sequence, the first lower needle rail comprises a seventh flat knitting groove, a fifth loop forming groove, a third tuck groove, an eighth flat knitting groove, a sixth loop forming groove and a ninth flat knitting groove in sequence, and the second lower needle rail comprises a tenth flat knitting groove, a seventh loop forming groove, an eleventh flat knitting groove, a twelfth flat knitting groove, an eighth loop forming groove and a fourth tuck groove in sequence; The weaving mode of the disc knitting device is as follows: a, the first upper needle and the second upper needle are ejected, the hydrophilic yarn and the connecting yarn are fed in respectively, and the yarn is bent and looped, the first lower needle and the second lower needle are in a floating state; b. the first lower needle and the second lower needle are withdrawn, the water-repellent yarn is fed in and looped, the first upper needle and the second upper needle are in the floating state; c. the first upper needle is in the tuck state, the second upper needle is in the floating state, the first lower needle is in the tuck state, and the second lower needle is in the floating state; d. the first upper needle and the second upper needle are withdrawn, the hydrophilic yarn is fed in and looped, and the first lower needle and the second lower needle are in the floating state; e. the first lower needle and the second lower needle are withdrawn, the water-repellent yarn is fed in and looped, and the first upper needle and the second upper needle are in the floating state; f. the first upper needle is in the floating state, the second upper needle is in the tuck state, the first lower needle is in the floating state, and the second lower needle is in the tuck state; The grey cloth comprises a water-repellent layer and a water-absorbing layer, the water-repellent layer covers the water-absorbing layer, the water-absorbing layer comprises hydrophilic yarn and connecting yarn, the water-repellent layer comprises water-repellent yarn, the water-repellent yarn covers the water-repellent yarn, the water-repellent layer and the water-absorbing layer both have mesh holes, the mesh hole density of the water-repellent layer is 120-150 holes / cm2, the mesh hole density of the water-absorbing layer is 80-100 holes / cm2, the mesh holes of the water-repellent layer and the mesh holes of the water-absorbing layer are staggered, the connecting yarn is distributed at the mesh holes of the water-absorbing layer, and the hydrophilic yarn is distributed at the mesh holes of the water-repellent layer. Step three: post-finishing process: the grey cloth is placed in a setting machine, the temperature of the setting machine is controlled at 160-180℃, and the time is 30-60 seconds, so as to stabilize the fabric size and maintain the yarn function.

2. The process for making a single face single barrier fabric according to claim 1, wherein: The feeding tension of the hydrophilic yarn in the disc needle knitting device is 15-20 cN, the feeding tension of the water-repellent yarn is 15.5-20.5 cN, the weaving density is 20-25 needles / inch, the looping depth is controlled at 0.5-0.8 mm, and the knitting speed is 18-22 revolutions / minute.

3. The process for making a single face single barrier fabric according to claim 1, wherein: The yarn arrangement ratio of the water-repellent layer to the water-absorbing layer is 1:1.2-1:1.

5.

4. The process for making a single-breathable single-protective fabric according to claim 1, characterized in that: The hydrophilic yarn is modified polyester filament, the hydrophilic property is obtained by treating with a polyurethane hydrophilic finishing agent, and the contact angle is ≤30°.

5. The process for making a single-breathable single-protective fabric according to claim 4, characterized in that: The hydrophilic yarn in step one needs to be pretreated, including ultrasonic cleaning with a solution mixed by ether and acetone at a volume ratio of 1:1, ultrasonic frequency of 40 kHz, time of 10-15 minutes, removal of surface oil and impurities, then soaking treatment with an acetic acid solution with a mass concentration of 5% for 20-30 minutes, bath ratio of 1:20, temperature control at 45-50℃, enhancement of fiber surface polar group activity, and finally washing to neutral with deionized water, drying in a hot air oven at 80-85℃ until the moisture content is ≤2%, and maintaining the fiber breaking elongation at ≤20%.

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