A double-sided filament sandwich fabric and a manufacturing method thereof

Abstract

The application provides a double-sided sandwich fabric and a manufacturing method thereof. The double-sided sandwich fabric comprises a surface layer, a bottom layer and an intermediate layer connecting the surface layer and the bottom layer; the surface layer is knitted by first yarn, the bottom layer is knitted by second yarn, the first yarn and the second yarn are cotton yarn respectively, and the intermediate layer is knitted by polyester fiber. The double-sided sandwich fabric is knitted by six-mode weaving method, the surface layer and the bottom layer adopt single-side opposite needle structure, the surface layer and the bottom layer form flat surfaces by loop formation, the intermediate layer forms a hollow layer by tuck formation, the fabric structure knitted is more stable, the cotton yarn of the surface layer and the bottom layer can cover the intermediate sandwich well, the hand feeling is more fluffy and hollow; after the preset shaping treatment, double-sided singeing, enzyme washing and other processes of the application, the intermediate sandwich part is guaranteed to be firmly covered in the middle of the surface layer and the bottom layer to the maximum extent and is not exposed, so that the double-sided sandwich fabric produced is not stinging and does not generate pilling.

Description

TECHNICAL FIELD

[0001] The present application relates to a double-sided interwoven fabric and a manufacturing method thereof, and belongs to the technical field of textile fabrics. BACKGROUND

[0002] In the field of textile fabrics, people have been pursuing and developing fabrics with continuously improved wearing comfort. Traditional single-sided knitted fabrics cannot fully meet the needs of consumers. Double-sided knitted fabrics are more and more popular because of their wearing comfort, good elasticity and air permeability, adjustable double-sided color, stronger fashion performance, thicker and more crisp, etc.

[0003] Among many textile raw materials, cotton fiber is soft and comfortable to the touch, and has excellent moisture absorption, which is loved by consumers. However, the severe shortage of cotton supply seriously affects the further development of the textile industry, and also determines that chemical fibers will be an important textile raw material for a long time. Polyester fiber is an important variety of synthetic fiber, and its biggest advantage is good wrinkle resistance and shape retention. However, the defects of not easy to sweat, feeling of prickle when touched, and easy to generate static electricity have always limited its use, which is not enough to meet the needs of consumers for the functionality of garment fabrics.

[0004] Therefore, it has become one of the problems to be solved in the field to develop a double-sided interwoven fabric, which has polyester fiber sandwiched between two layers of cotton, and the obtained double-sided interwoven fabric is not scratchy and not easy to generate pilling. SUMMARY

[0005] To solve the above technical problems, the purpose of the present application is to provide a double-sided interwoven fabric and a manufacturing method thereof. The double-sided interwoven fabric provided by the present application has the advantages of light weight, not easy to generate pilling, not scratchy, etc.

[0006] To achieve the above purpose, the present application first provides a double-sided interwoven fabric, which comprises a surface layer, a bottom layer and an intermediate layer connecting the surface layer and the bottom layer; wherein the surface layer is knitted from first yarn, the bottom layer is knitted from second yarn, and the first yarn and the second yarn are cotton yarn respectively, and the intermediate layer is knitted from polyester fiber;

[0007] The double-sided interwoven fabric is knitted by the following knitting weaving process:

[0008] Knitted by six-mold weaving, and the upper and lower disc knitting needles are arranged in pairs;

[0009] The first mold upper disc and the lower disc are knitted in tuck stitch mode with the polyester fiber (tuck stitch every other needle);

[0010] The second mold lower disc is not knitted, the upper disc is knitted in first needle loop and second needle float, and then the second yarn is knitted in the mode of loop formation every other needle alternately (loop formation every other needle);

[0011] The third upper disc is not knitted, the lower disc is knitted with the first yarn in the way of forming loops on the first needle and then alternately forming loops on the second needle (seam knitting), and the second yarn is knitted in the way of forming loops on the second needle and then alternately forming loops on the first needle (seam knitting);

[0012] The fourth upper disc and the lower disc are knitted with the polyester fiber in the way of tuck knitting (seam tuck knitting);

[0013] The fifth lower disc is not knitted, the upper disc is knitted with the second yarn in the way of forming loops on the first needle and then alternately forming loops on the second needle (seam knitting), and the first yarn is knitted in the way of forming loops on the second needle and then alternately forming loops on the first needle (seam knitting);

[0014] The sixth upper disc is not knitted, the lower disc is knitted with the first yarn in the way of forming loops on the first needle and then alternately forming loops on the second needle (seam knitting), and the second yarn is knitted in the way of forming loops on the second needle and then alternately forming loops on the first needle (seam knitting).

[0015] The double-faced sandwich fabric of the present application adopts a special knitting process, and the full-loop staggered needle structure of the traditional surface layer and the bottom layer is improved into a single-sided opposite needle structure, so that the surface layer and the bottom layer form a flat surface by the full-loop structure, and the intermediate layer forms a hollow layer by the tuck structure, so that the structure of the obtained double-faced sandwich fabric is more stable, the cotton yarn of the surface layer and the bottom layer can cover the intermediate sandwich well, and the hand feeling is more fluffy and hollow.

[0016] In the above double-faced sandwich fabric, preferably, the cotton yarn includes 100% cotton ring-spun cotton yarn and / or 100% cotton compact-spun cotton yarn, etc., the 100% cotton ring-spun cotton yarn is a cotton yarn with 20-40 English, a twist factor of 3.2-3.8, and the 100% cotton compact-spun cotton yarn is a cotton yarn with 20-40 English, a twist factor of 3.2-3.8.

[0017] In the above double-faced sandwich fabric, preferably, the polyester fiber includes a polyester fiber with 50D-100D and 12-24F.

[0018] According to the specific embodiment of the present application, preferably, the gram weight of the double-faced sandwich fabric is 280-360 g / m 2 .

[0019] In the above double-faced sandwich fabric, preferably, the knitting and weaving process adopts a double-faced circular machine, and the throat distance between the needle cylinder and the needle disc is adjusted to be 2-2.5 mm, the yarn feeding tension is 15-20 N, and the machine speed is 20-23 r / min. More preferably, the circular machine adopted in the knitting and weaving process is a SOLID machine type equipped with an active yarn feeding device. The needle cylinder is preferably a 22G-24G needle cylinder, i.e., a large-size high-density needle cylinder.

[0020] In the double-sided interwoven fabric, preferably, the yarn length of the first, third and fourth modules ranges from 153mm to 157mm, and the yarn length of the second, fifth and sixth modules ranges from 93mm to 97mm.

[0021] According to the specific embodiment of the present application, preferably, the double-sided interwoven fabric is made by the following steps: knitting a fabric by the knitting process as the grey cloth, and then performing at least the following processes on the grey cloth: pre-setting, double-sided singeing, enzyme washing, etc., to obtain the double-sided interwoven fabric.

[0022] In the double-sided interwoven fabric, preferably, the pre-setting is performed on a pre-setting machine, the pre-setting temperature is 195-205℃, the machine speed is 16-24m / min, the number of times is 1-2, the width is 70-80 inches, and the overfeed is 15-35%.

[0023] In the double-sided interwoven fabric, preferably, the double-sided singeing is performed by a singeing machine, and the singeing temperature is 1400-1500℃, and the machine speed is 80-85m / min.

[0024] In the double-sided interwoven fabric, preferably, the enzyme washing is performed by placing the fabric in an enzyme washing solution with a bath ratio of 1:(6-10) (more preferably 1:(6-8)) at 45-55℃ for 45-90min; wherein the enzyme washing solution is a solution containing 1.5-3g / L cellulase. The cellulase can be a cellulase commonly used in enzyme washing processes, such as Cellusoft produced by Novozymes Biological Technology Co., Ltd. More preferably, the enzyme washing solution comprises 1.5-3g / L cellulase, 0.1-1.0g / L sodium acetate and 0.1-1.0g / L acetic acid, and the solvent is water, and the pH value is 5-6.5.

[0025] On the other hand, the present application provides a method for making the double-sided interwoven fabric, which comprises the following steps: knitting a fabric by the knitting process as the grey cloth, and then performing at least the following processes on the grey cloth: pre-setting, double-sided singeing, enzyme washing, etc., to obtain the double-sided interwoven fabric.

[0026] In the method, the knitting process is performed by a six-module knitting method, and the upper and lower needles are arranged in pairs.

[0027] The first module upper and lower needles are knitted in a tuck stitch mode (tuck stitch every other needle);

[0028] The second module lower needle is not knitted, the upper needle is knitted in a first needle loop and a second needle float mode, and then the second yarn is knitted in a loop mode by alternately changing the needles (loop every other needle);

[0029] The third upper disc is not knitted, the lower disc is knitted with the first needle thread, the second needle loop, and then the loop is alternately knitted (separate needle loop) with the first yarn;

[0030] The fourth upper disc and the lower disc are knitted with the polyester fiber (separate needle loop) with the tuck stitch;

[0031] The fifth lower disc is not knitted, the upper disc is knitted with the first needle loop, the second needle thread, and then the loop is alternately knitted (separate needle loop) with the second yarn;

[0032] The sixth upper disc is not knitted, the lower disc is knitted with the first needle thread, the second needle loop, and then the loop is alternately knitted (separate needle loop) with the first yarn.

[0033] In the above manufacturing method, preferably, the knitting process uses a double-sided circular machine, and the cylinder clearance between the needle cylinder and the needle disc is adjusted to 2-2.5mm, the yarn feeding tension is 15-20N, and the machine speed is 20-23r / min. More preferably, the circular machine used in the knitting process is a SOLID machine type equipped with an active yarn feeding device. The needle cylinder is preferably a 22G-24G needle cylinder, i.e. a large size tight needle spacing needle cylinder.

[0034] In the above manufacturing method, preferably, the yarn length range of the first mode, the third mode, and the fourth mode is 153mm-157mm, and the yarn length range of the second mode, the fifth mode, and the sixth mode is 93mm-97mm.

[0035] In the above manufacturing method, preferably, the preset shaping process is carried out on a preset shaping machine, the preset shaping temperature is 195-205℃, the machine speed is 16-24m / min, the number of times is 1-2 times, the width is 70-80 inches, and the overfeed amount is 15-35%.

[0036] In the above manufacturing method, preferably, the double-sided singeing is carried out using a singeing machine, and the singeing temperature is 1400-1500C℃, and the machine speed is 80-85m / min.

[0037] In the above manufacturing method, preferably, the enzyme washing is carried out by placing the fabric in an enzyme washing solution with a bath ratio of 1:(6-10) (more preferably 1:(6-8)) at 45-55℃ for 45-90min; wherein the enzyme washing solution is a solution containing 1.5-3g / L cellulase. The cellulase can be a cellulase commonly used in enzyme washing processes, such as Cellusoft produced by Novozymes Biological Technology Co., Ltd. More preferably, the enzyme washing solution includes 1.5-3g / L cellulase, 0.1-1.0g / L sodium acetate, and 0.1-1.0g / L acetic acid, and the solvent is water, and the pH value is 5-6.5.

[0038] Through the enzyme washing process of the present application, long-chain macromolecules of cellulose are decomposed into low-molecular sugar or monomolecular glucose, thereby reducing the lint and nub on the surface of the yarn or fabric, making the fabric less likely to generate lint again, the surface of the fabric being less short lint, smooth and clean, and the fabric having higher grade and better PILLING index.

[0039] In the above manufacturing method, preferably, the grey fabric obtained through the knitting process is subjected to, at least in sequence, pre-setting treatment, double-side singeing, dyeing and finishing, enzyme washing, opening and water-rolling, drying, setting and the like to obtain the double-sided filament-embedded fabric.

[0040] In the above manufacturing method, the dyeing and finishing can adopt conventional dyeing and finishing processes in the art.

[0041] In the above manufacturing method, preferably, the opening and water-rolling is performed by using an opening machine, so that the moisture content of the fabric after opening and water-rolling is 10-30%.

[0042] In the above manufacturing method, preferably, the drying is performed by using a drying machine, so that the moisture content of the fabric after drying is less than 10%.

[0043] In the above manufacturing method, preferably, the setting is performed on a setting machine, the setting temperature is 150-170℃, the machine speed is 16-24m / min, the width is 155-170cm, the overfeed is 15-35%, and the setting agent used can include 3-8g / L of catalyst, 20-100g / L of softening agent and 1-2g / L of penetrating agent, and the solvent is water. The catalyst, softening agent and penetrating agent used can all be conventional agents used in the setting process in the art.

[0044] The connection of the chemical fiber filaments between the surface layer and the bottom layer of the fabric has certain exposure risk, especially after the dyeing and finishing process, if the exposed chemical fiber filaments are broken, the fabric surface will have a "prickly feeling". Moreover, in the use process, the exposed chemical fiber filaments gradually gather into balls due to the action of wearing and rubbing, thereby affecting the wearing performance of the fabric. The double-sided filament-embedded fabric provided by the present application selects specific raw yarns, ensures that the polyester fibers in the middle filament-embedded part have less single scattered fibers and good bundling property, and adopts a special knitting process to improve the weaving method, so that the structure of the grey fabric obtained by knitting is more stable, the cotton yarns of the surface layer and the bottom layer can cover the middle filament-embedded part well, and the hand feeling is more fluffy and hollow. After the pre-setting treatment, double-side singeing, enzyme washing and the like of the present application, the middle filament-embedded part is maximally ensured to be firmly covered between the surface layer and the bottom layer without exposure, so that the finally manufactured double-sided filament-embedded fabric is not prickly and does not generate balls.

[0045] Therefore, the double-faced interwoven fabric has the advantages of light weight, thick warmth, no leakage of yarn, no pricking, and no easy pilling, and has high wearing performance. BRIEF DESCRIPTION OF DRAWINGS

[0046] Figure 1 A schematic diagram of the knitting weaving process of Example 1.

[0047] Figure 2 An appearance diagram of the double-faced interwoven fabric produced in Example 1.

[0048] Figure 3 A schematic diagram of the knitting weaving process of Comparative Example 3. DETAILED DESCRIPTION

[0049] In order to have a clearer understanding of the technical features, objectives and beneficial effects of the present application, the technical solutions of the present application will be described in detail below, but it cannot be understood as limiting the implementable scope of the present application.

[0050] Example 1

[0051] The present embodiment provides a double-faced interwoven fabric, which comprises a surface layer, a bottom layer and an intermediate layer connecting the surface layer and the bottom layer; wherein the surface layer is knitted by a first yarn, the bottom layer is knitted by a second yarn, and the intermediate layer is knitted by a polyester fiber;

[0052] and the first yarn is 100% cotton ring-spun cotton yarn with 32S and a twist factor of 3.2-3.6,

[0053] the second yarn is 100% cotton ring-spun cotton yarn with 32S and a twist factor of 3.2-3.6, which is the same as the first yarn,

[0054] the polyester fiber is a polyester fiber with 75D / 24F.

[0055] The specific process of the production method of the double-faced interwoven fabric of the present embodiment is: knitting→opening→fabric inspection→fabric preparation→pre-setting→double-sided singeing→dyeing and finishing→enzyme washing→opening and water-rolling→drying→setting→post-inspection and rolling.

[0056] The knitting is performed by a SOLID model of a 24G30” double-sided circular knitting machine equipped with an active yarn feeding device, the throat distance between the needle cylinder and the needle disc is adjusted to 2.3mm, the yarn feeding tension is 18N, the machine speed is 21r / min, and the needle cylinder is 24G.

[0057] As Figure 1As shown, the first module upper disc and lower disc are knitted with tuck method with the polyester fiber (tuck every other needle); the second module lower disc is not knitted, and the upper disc is knitted with first needle loop, second needle float, and then every needle alternately loop (loop every other needle); the third module upper disc is not knitted, and the lower disc is knitted with first needle float, second needle loop, and then every needle alternately loop (loop every other needle); the fourth module upper disc and lower disc are knitted with tuck method with the polyester fiber (tuck every other needle); the fifth module lower disc is not knitted, and the upper disc is knitted with first needle loop, second needle float, and then every needle alternately loop (loop every other needle); the sixth module upper disc is not knitted, and the lower disc is knitted with first needle float, second needle loop, and then every needle alternately loop (loop every other needle). The yarn length of the first module, third module, and fourth module ranges from 153 mm to 157 mm, and the yarn length of the second module, fifth module, and sixth module ranges from 93 mm to 97 mm.

[0058] The fabric obtained by the above-mentioned knitting process can cover the intermediate filament (polyester fiber) with the cotton yarn of the face layer and the bottom layer, and form a stable double-sided filament fabric.

[0059] Opening, inspection, and preparation: performed according to the conventional manner in the art.

[0060] Pre-setting: performed on a pre-setting machine, the pre-setting temperature is 205 °C, the machine speed is 20 m / min, the number of times is 1-2, the width is 70-75 inches, and the overfeed is 15%.

[0061] Double-sided singeing: performed by using a singeing machine, the fabric obtained after the pre-setting is opened into the singeing machine along the bottom loop direction, and the singeing temperature is 1450 °C and the machine speed is 80 m / min.

[0062] Dyeing and finishing: performed according to the conventional manner in the art.

[0063] Enzyme washing: the fabric is arranged in an enzyme washing solution according to a bath ratio of 1:8, and treated at 50 °C for 60 min; the enzyme washing solution comprises 3 g / L cellulase, 0.5 g / L sodium acetate, and 0.3 g / L acetic acid, and the solvent is water, and the pH value is 5.5; the cellulase can be a cellulase commonly used in the enzyme washing process, such as Cellusoft produced by Novozymes Biological Technology Co., Ltd.

[0064] Opening and water rolling: performed by using an opening machine, and the liquid retention rate of the fabric after the opening and water rolling is 10-30%.

[0065] Drying: performed by using a SANTEX drying machine, and the moisture content of the fabric after the drying is less than 10%.

[0066] Drying: drying was performed on a drying machine at a drying temperature of 160°C, a machine speed of 20 m / min, a width of 160 cm, and a superfeed of 25%, and a drying agent used can include 5-6 g / L of a catalyst, 50-60 g / L of a softener, and 1-2 g / L of a penetrant, and a solvent used is water; the catalyst, the softener, and the penetrant used can each be a treatment agent conventionally used in the drying process in the art, for example, the catalyst can be magnesium chloride, the softener can be JSS soft oil (Magnasoft JSS), and the penetrant can be a fatty alcohol polyoxyethylene ether.

[0067] Post-inspection and rolling: performed in a conventional manner in the art.

[0068] Figure 2 An appearance diagram of the double-faced filament-inserted fabric produced in this example. The double-faced filament-inserted fabric produced in this example has a grammage of 320 g / m 2 .

[0069] Example 2

[0070] This example provides a double-faced filament-inserted fabric including a face layer, a bottom layer, and an intermediate layer connecting the face layer and the bottom layer; wherein the face layer is woven from first yarns, the bottom layer is woven from second yarns, and the intermediate layer is woven from polyester fibers;

[0071] and the first yarns are 100% cotton compact-spun cotton yarns of 32S and a twist factor of 3.6-3.8,

[0072] the second yarns are 100% cotton compact-spun cotton yarns of 40S and a twist factor of 3.6-3.8,

[0073] the polyester fibers are polyester fibers of 50D / 24F.

[0074] The production method of the double-faced filament-inserted fabric of this example is the same as that of Example 1. The double-faced filament-inserted fabric produced in this example has a grammage of 285 g / m 2 .

[0075] Comparative Example 1

[0076] This comparative example provides a double-faced filament-inserted fabric including a face layer, a bottom layer, and an intermediate layer connecting the face layer and the bottom layer; wherein the face layer is woven from first yarns, the bottom layer is woven from second yarns, and the intermediate layer is woven from polyester fibers;

[0077] and the first yarns are 100% cotton ring-spun cotton yarns of 32S and a twist factor of 3.2-3.6,

[0078] The second yarn is 32S, 100% cotton ring spun cotton yarn with a twist factor of 3.2-3.6, which is the same as the first yarn,

[0079] The polyester fiber is a polyester fiber of 75D / 72F.

[0080] The specific process of the production method of the double-sided interwoven fabric of the present comparative example is: knitting→opening→fabric inspection→fabric preparation→pre-setting→double-sided singeing→dyeing and finishing→enzyme washing→opening and water rolling→drying→setting→post-inspection and rolling.

[0081] The knitting is performed by using a SOLID model of an 18G30" double-sided circular machine equipped with an active yarn feeding device, adjusting the cylinder port distance between the needle cylinder and the needle disc to be 0mm, the yarn feeding tension to be 15N, and the machine speed to be 23r / min, and the needle cylinder is 18G.

[0082] The first yarn is knitted by full-loop knitting on the upper disc of the first module and no knitting on the lower disc; the second yarn is knitted by full-loop knitting on the lower disc of the second module and no knitting on the upper disc; and the polyester fiber is knitted by tuck knitting on the upper disc and the lower disc of the third module (tuck knitting with every two needles). The yarn length of the first module is 160mm, the yarn length of the second module is 160mm, and the yarn length of the third module is 280mm.

[0083] The processes of opening, fabric inspection, fabric preparation, pre-setting, dyeing and finishing, opening and water rolling, drying, setting, post-inspection and rolling are the same as those of Example 1. The processes of double-sided singeing and enzyme washing are different from those of Example 1, and are as follows:

[0084] Double-sided singeing: using a singeing machine to make the grey fabric obtained after pre-setting open into the singeing machine along the bottom loop direction, and the temperature of singeing is 800-900℃ and the machine speed is 80m / min.

[0085] Enzyme washing: the fabric is arranged in the enzyme washing solution in a bath ratio of 1:8 and treated at 50℃ for 60min; wherein the enzyme washing solution comprises 1g / L cellulase, 0.5g / L sodium acetate and 0.3g / L acetic acid, and the solvent is water with a pH value of 5.5; the cellulase can be a cellulase commonly used in enzyme washing process, such as Cellusoft produced by Novozymes Biological Technology Co., Ltd.

[0086] Comparative Example 2

[0087] The present comparative example provides a double-sided interwoven fabric, which comprises a face layer, a bottom layer and an intermediate layer connecting the face layer and the bottom layer; wherein the face layer is knitted by a first yarn, the bottom layer is knitted by a second yarn, and the intermediate layer is knitted by a polyester fiber;

[0088] And the first yarn is 32S, 100% cotton compact spinning cotton yarn with twist factor of 3.6-3.8,

[0089] The second yarn is 40S, 100% cotton compact spinning cotton yarn with twist factor of 3.6-3.8,

[0090] The polyester fiber is 50D / 36F polyester fiber.

[0091] The production method of the double-faced interwoven fabric of the present comparative example is the same as that of comparative example 1.

[0092] Comparative example 3

[0093] The present comparative example provides a hollow fabric, which comprises a face layer, a bottom layer and an intermediate layer connecting the face layer and the bottom layer; wherein the face layer and the bottom layer are both knitted from cotton yarn and spandex elastic filament, and the intermediate layer is knitted from polyester fiber;

[0094] And the cotton yarn for knitting the face layer is 32S, 100% cotton compact spinning cotton yarn with twist factor of 3.6-3.8,

[0095] The cotton yarn for knitting the bottom layer is 40S, 100% cotton compact spinning cotton yarn with twist factor of 3.6-3.8,

[0096] The spandex elastic filament is 20D Lycra,

[0097] The polyester fiber is 50D / 36F polyester fiber.

[0098] The specific process of the production method of the hollow fabric of the present comparative example is: knitting→opening→fabric inspection→fabric preparation→pre-setting→double-sided singeing→dyeing and finishing→enzymatic washing→opening and water-rolling→drying→setting→post-inspection and rolling.

[0099] The knitting adopts SOLID model of 18G30” double-sided circular machine equipped with positive yarn feeding device, the distance between needle cylinder and needle disc is adjusted to 0mm, the yarn feeding tension is 15N, the machine speed is 23r / min, and the needle cylinder is 18G.

[0100] As shown in FIG. 1, the weaving mode is: up and down disc weaving needle alignment, the first mode upper disc knits cotton yarn and spandex elastic filament, and the lower disc does not knit; Figure 3

[0101] The second mode upper disc does not knit, and the lower disc knits cotton yarn and spandex elastic filament;

[0102] The third mode upper and lower discs knit polyester fiber in tuck mode, and tuck every other needle;

[0103] The fourth mode upper disc knits cotton yarn and spandex elastic filament, and the lower disc does not knit;

[0104] ​The fifth upper disc is not knitted, and the lower disc is knitted with cotton yarn and spandex elastic filament;

[0105] The sixth upper and lower discs are knitted with tuck stitches with polyester fibers.

[0106] The processes of opening, inspecting, preparing, pre-setting, dyeing and finishing, opening, water-rolling, drying, setting, post-inspecting, and rolling are the same as those in Example 1. The double-sided singeing and enzyme washing processes are different from those in Example 1, and are as follows:

[0107] Double-sided singeing: using a singeing machine to make the grey fabric obtained after pre-setting open into the singeing machine along the bottom loop direction, and the temperature for singeing is 800-900℃, and the machine speed is 80m / min.

[0108] Enzyme washing: arranging the fabric in the enzyme washing solution at a bath ratio of 1:8 and treating for 60min at 50℃; wherein the enzyme washing solution comprises 1g / L cellulase, 0.5g / L sodium acetate, and 0.3g / L acetic acid, and the solvent is water, and the pH value is 5.5; the cellulase can be a cellulase commonly used in the enzyme washing process, such as Cellusoft produced by Novozymes Biotech Co., Ltd. The grammage of the hollow fabric of the present comparative example is 290g / m 2 .

[0109] Comparing the double-sided sandwiched filament fabrics provided by Examples 1 and 2 with the fabrics provided by Comparative Examples 1, 2, and 3, the results are shown in Table 1. Among them, the test method of pilling is carried out according to the method in Q+LNB+22001-2020 “Commonly Used Knitted Fabrics”.

[0110] Table 1

[0111] Comparison Knit yarn count Hand feeling Pilling Example 1 32S + 75D / 24F Good hollow feeling, not prickly 3.5 Example 2 32S + 40S + 50D / 24F Good hollow feeling, not prickly 3.5 Comparative Example 1 32S + 75D / 72F Slightly poor hollow feeling, prickly 2.5 Comparative Example 2 32S + 40S + 50D / 36F Slightly poor hollow feeling, prickly 3.0 Comparative Example 3 32S + 40S + 50D / 36F + 20D Good hollow feeling, not prickly 3.0

[0112] As can be seen from the data in Table 1, the yarn raw materials and the double-sided singeing and enzyme washing processes adopted by Comparative Examples 1 and 2 are not within the scope of the present application, and the conventional knitting method is adopted, so that the hollow feeling of the double-sided sandwiched filament fabric prepared is slightly poor, and it is easy to pill. The yarn raw materials and the double-sided singeing and enzyme washing processes adopted by Comparative Example 3 are not within the scope of the present application, and the knitting method is completely different from that of the present application, so that the hollow fabric prepared has good hollow feeling and is not hand-piercing, but is poor in pilling resistance compared with the present application.

Claims

1. A double-sided woven fabric, comprising a face layer, a back layer, and an intermediate layer connecting the face layer and the back layer; wherein, The outer layer is woven from a first yarn, the bottom layer is woven from a second yarn, and the first yarn and the second yarn are both cotton yarns, while the middle layer is woven from polyester fibers. The double-sided woven fabric is obtained through the following knitting process: The six-mode weaving method is used, with the upper and lower coils arranged in alignment; The polyester fibers are woven in a loop-like manner between the upper and lower plates of the first mold. The second pattern is not knitted on the bottom plate. The second yarn is knitted on the top plate by forming a loop with the first stitch, then floating the second stitch, and then alternating stitches to form loops. The upper part of the third pattern is not knitted, and the lower part is knitted with the first stitch as a float, the second stitch as a loop, and then the first yarn is knitted by alternating stitches to form loops. The upper and lower plates of the fourth mold are woven together in a loop-like manner to produce the polyester fibers; The fifth pattern is not knitted on the bottom plate. The second yarn is knitted on the top plate by forming a loop with the first stitch, then floating the second stitch, and then alternating stitches to form loops. The upper part of the sixth pattern is not knitted, while the lower part is knitted with the first stitch as a float, the second stitch as a loop, and then the first yarn is knitted by alternating stitches to form loops. The polyester fibers include polyester fibers of 50D-100D and 12-24F. The yarn length ranges of the first, third, and fourth molds are 153mm-157mm, and the yarn length ranges of the second, fifth, and sixth molds are 93mm-97mm. The double-sided woven fabric is obtained through the following steps: The fabric woven through the knitting process is used as the greige fabric. The greige fabric undergoes at least pre-forming treatment, double-sided singeing, and enzyme washing to obtain the double-sided woven fabric. The pre-forming treatment is performed on a pre-forming machine at a temperature of 195-205℃, a machine speed of 16-24 m / min, 1-2 times, a width of 70-80 inches, and an overfeed of 15-35%. The double-sided singeing is performed using a singeing machine at a temperature of 1400-1500℃ and a machine speed of 80-85 m / min. The enzyme washing involves placing the fabric in an enzyme washing solution at a liquor ratio of 1:(6-10) and treating it at 45-55℃ for 45-90 minutes. The enzyme washing solution contains 1.5-3 g / L of cellulose bio-enzyme.

2. The double-sided woven fabric according to claim 1, wherein, The cotton yarn includes 100% cotton ring-spun cotton yarn and / or 100% cotton compact-spun cotton yarn. The 100% cotton ring-spun cotton yarn is 20-40 count cotton yarn with a twist coefficient of 3.2-3.8, and the 100% cotton compact-spun cotton yarn is 20-40 count cotton yarn with a twist coefficient of 3.2-3.

8.

3. The double-sided woven fabric according to claim 1, wherein, The weight of the double-sided woven fabric is 280-360 g / m². 2 .

4. A method for manufacturing a double-sided woven fabric according to any one of claims 1-3, comprising the following steps: The fabric is woven using a knitting process, and the woven fabric is used as a greige fabric. The greige fabric is subjected to at least pre-forming treatment, double-sided singeing, and enzyme washing to obtain the double-sided woven fabric. The knitting process employs a six-die knitting method, with the upper and lower knitting needles arranged in alignment. The polyester fibers are woven in a loop-like manner between the upper and lower plates of the first mold. The second pattern is not knitted on the bottom plate. The second yarn is knitted on the top plate by forming a loop with the first stitch, then floating the second stitch, and then alternating stitches to form loops. The upper part of the third pattern is not knitted, and the lower part is knitted with the first stitch as a float, the second stitch as a loop, and then the first yarn is knitted by alternating stitches to form loops. The upper and lower plates of the fourth mold are woven together in a loop-like manner to produce the polyester fibers; The fifth pattern is not knitted on the bottom plate. The second yarn is knitted on the top plate by forming a loop with the first stitch, then floating the second stitch, and then alternating stitches to form loops. The upper part of the sixth pattern is not knitted, while the lower part is knitted with the first stitch as a float, the second stitch as a loop, and then the first yarn is knitted by alternating stitches to form loops. The yarn length ranges of the first, third, and fourth molds are 153mm-157mm, and the yarn length ranges of the second, fifth, and sixth molds are 93mm-97mm. The pre-forming process is performed on a pre-forming machine, with a pre-forming temperature of 195-205℃, a machine speed of 16-24m / min, 1-2 times per cycle, a width of 70-80 inches, and an overfeed of 15-35%. The double-sided singeing is performed using a singeing machine at a temperature of 1400-1500℃ and a machine speed of 80-85m / min. The enzyme washing involves placing the fabric in an enzyme washing solution at a bath ratio of 1:(6-10) and treating it at 45-55°C for 45-90 minutes; wherein the enzyme washing solution contains 1.5-3 g / L of cellulose bio-enzyme.

5. The manufacturing method according to claim 4, wherein, The knitting process uses a double-sided circular knitting machine, and the distance between the cylinder and the needle plate is adjusted to 2-2.5mm, the yarn tension is 15-20N, and the machine speed is 20-23r / min.

6. The manufacturing method according to claim 5, wherein, The circular knitting machine used in the knitting process is a SOLID model equipped with an active yarn feeding device.

7. The manufacturing method according to claim 5, wherein, The syringe is a 22G~24G syringe.

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