A weft-knitted free-cutter knitted fabric and a method for manufacturing the same

Abstract

The present application relates to a kind of weft-knitted free cutting knitted fabric and its manufacturing method, the fabric includes air layer jacquard structure, the air layer jacquard structure includes three layers of bottom layer, intermediate layer and surface layer, the bottom layer is below the intermediate layer, the surface layer is above the intermediate layer, the bottom layer is interwoven using nylon yarn and ordinary spandex, the intermediate layer is connected using ordinary spandex, and extend to the surface layer, the surface layer is interwoven using nylon yarn and ordinary spandex.The present application can realize the effect that both economic and not easy to scatter, burr, edge curl of loop structure.

Description

Technical Field

[0001] This invention relates to the field of knitted fabric technology, and in particular to a weft-knitted free-cut knitted fabric and its manufacturing method. Background Technology

[0002] Currently available weft-knitted fabrics, due to their inherent structural characteristics, are prone to unraveling, frayed edges, and curling at the cut edges after cutting. This not only affects the fabric's appearance and wearing comfort but also leads to significant cutting waste, resulting in an unattractive, uncomfortable, and uneconomical product—clearly contradicting the current pursuit of fashion, simplicity, and comfort. Existing technology proposes incorporating fusible spandex during the weft knitting process. Through heat treatment at a specific temperature for a period of time, the surface of the spandex filaments melts, causing the spandex filaments between the loops to adhere and form a mesh structure, thus preventing the loops from unraveling. However, the high price of fusible spandex makes this method uneconomical. Summary of the Invention

[0003] The purpose of this invention is to provide a weft-knitted free-cut fabric and its manufacturing method, which can achieve the effect of being both economical and having a loop structure that is not easy to unravel, fray, or curl.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a weft-knitted free-cut fabric, characterized in that: the fabric includes an air-layer jacquard structure, the air-layer jacquard structure includes three layers: a bottom layer, a middle layer, and a top layer, the bottom layer is located below the middle layer, the top layer is located above the middle layer, the bottom layer is made of nylon yarn and ordinary spandex interwoven, the middle layer is made of ordinary spandex connected and extends to the top layer, and the top layer is made of nylon yarn and ordinary spandex interwoven.

[0005] Furthermore, the ordinary spandex is bonded together among the bottom layer, middle layer and top layer to form a mesh structure.

[0006] A method for manufacturing a weft-knitted free-cut knitted fabric, characterized in that the manufacturing method includes a knitting process, wherein a double-sided circular knitting machine is used to produce the fabric greige; the double-sided circular knitting machine has BABABABA needles on the dial and ABABABAC needles on the cylinder, and adopts a double-sided needle position;

[0007] In the first track, needle A on the first track of the needle plate is undone, and needle B on the second track is knitted in a loop; needle A on the first track of the needle cylinder is undone, needle B on the second track is knitted in a loop, and needle C on the third track is knitted in a loop, with ordinary spandex entering the first track; in the second track, needles A and B on the first and second tracks of the needle plate are knitted in a loop; needles A, B, and C on the first, second, and third tracks of the needle cylinder are undone, with nylon and ordinary spandex entering the second track.

[0008] In the third row, the first and second tracks of the needle plate are knitting needles A and B with floating yarn; the first, second and third tracks of the needle cylinder are knitting needles A, B and C in loops; the third row is filled with nylon and ordinary spandex.

[0009] In the 4th row, needle A is tucked in the first track of the needle plate, and needle B is floated in the second track; needle A is tucked in the first track of the needle cylinder, and needles B and C are floated in the second and third tracks; ordinary spandex is fed into the 4th row.

[0010] Routes 5, 8, 11, 14, and 17 are the same as route 2 in terms of weaving method;

[0011] Routes 6, 9, 12, 15, and 18 are the same as route 3 in terms of weaving method;

[0012] The weaving method for routes 10 and 16 is the same as that for route 4;

[0013] The weaving method for the 7th row is the same as that for the 1st row;

[0014] In the 13th row, the first track of the needle plate is for floating yarn on needle A, and the second track is for knitting needle B in a clustered loop; the first track of the needle cylinder is for floating yarn on needle A, and the second and third tracks are for knitting needles B and C in a clustered loop; the 13th row is for ordinary spandex.

[0015] The first to the 18th rows form one cycle, and this process is repeated to form the fabric greige.

[0016] Furthermore, the manufacturing method also includes a pre-forming process, a dyeing and finishing process, and a finished product setting process, wherein the dyeing and finishing process includes the following steps:

[0017] Step S1: First, add water to the dyeing vat, then add soft water. With a liquor ratio of 1:10 to 1:30, and at room temperature, place the fabric into the dyeing vat. First, add 0.1 g / L of acidic leveling agent, then add the dye; then add 0.4 g / L of dyeing accelerator; first, raise the temperature at a rate of 0.6 to 1.5°C per minute, and hold it at 98°C for 40 minutes. Then, lower the temperature at a rate of 0.6 to 1.5°C per minute until it reaches 80°C. Add 2 g / L of caustic soda flakes and 4 g / L of sodium hydrosulfite, hold for 20 minutes, and then lower the temperature at a rate of 0.6 to 1.5°C per minute until it reaches 55°C. Cut a sample for color matching, drain the water after accurate matching, and then wash twice and drain the water again.

[0018] Step S2: Refill with soft water, first add 0.2 g / L of dyeing acid DA, then 0.6 g / L of acidic fixing agent, followed by 0.1 g / L of oligomer dispersant for cleaning. Then raise the temperature at a rate of 0.6–1.5 °C per minute to 70 °C and maintain this temperature for 30 minutes. Finally, lower the temperature at a rate of 0.6–1.5 °C per minute to 55 °C. Cut the sample for color matching, ensure accuracy, then drain the water. Wash twice and drain again. Remove the fabric from the vat.

[0019] Furthermore, the pre-forming process is performed before the dyeing process begins. This pre-forming process includes heat-treating the fabric at a specific temperature for a period of time, causing the surface of the ordinary spandex to melt and the ordinary spandex between the loops to adhere to each other, forming a mesh structure. The pre-forming temperature is 195–210°C, and the pre-forming speed is 5–30 m / min.

[0020] Furthermore, the finished product setting process includes setting the knitted fabric after the dyeing and finishing process, impregnating it with a softening agent during the finished product setting process, the temperature of the finished product setting process is 130-145℃, and the setting speed is 15-30m / min.

[0021] Furthermore, the dye contains 0.86% Flexit Yellow FA-M, 0.22% Flexit Red FA-M, 3.5% Acid Black MS-F, and 0.18% Disperse Black PLUS, and the contents are calculated relative to the fabric weight.

[0022] The beneficial effects of this invention are as follows: This invention adopts an air-layer jacquard structure and uses ordinary spandex. Through a special structural design, it is heat-treated at a specific temperature for a period of time, causing the surface of the spandex yarn to melt and the spandex yarns between the loops to stick together to form a mesh structure. This achieves the effect that the loops at the cut position of the knitted fabric are not easy to unravel, fray, or curl, and realizes the function of free cutting. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the fabric structure of the present invention;

[0024] Figure 2 This is a weaving diagram illustrating the manufacturing method of the present invention.

[0025] The layers are: 1. bottom layer, 2. middle layer, and 3. top layer. Detailed Implementation

[0026] The invention will now be further described with reference to the accompanying drawings.

[0027] Please see Figures 1 to 2This invention provides an embodiment: a weft-knitted free-cut fabric, characterized in that: the fabric includes an air-layer jacquard structure, the air-layer jacquard structure comprising three layers: a bottom layer 1, a middle layer 2, and a top layer 3. The bottom layer 1 is located below the middle layer 2, and the top layer 3 is located above the middle layer 2. The bottom layer 1 is woven from nylon yarn and ordinary spandex. The middle layer 2 is connected with ordinary spandex and extends to the top layer 3. The top layer 3 is woven from nylon yarn and ordinary spandex. The free-cut knitted fabric of this invention uses nylon yarn and ordinary spandex woven together, and is made using a 18G-50G double-sided circular knitting machine. The structure adopts an air-layer jacquard structure, divided into three layers. The top layer 3 is woven from nylon yarn and ordinary spandex. The middle layer 2 is connected with ordinary spandex and extends to the top layer 3 to form a jacquard effect. The bottom layer 1 is woven from nylon yarn and ordinary spandex. The specific structure is as follows: Figure 1 As shown.

[0028] Please continue reading. Figures 1 to 2 As shown, in one embodiment of the present invention, the ordinary spandex is bonded together between the bottom layer 1, the middle layer 2, and the top layer 3 to form a mesh structure. By heat-treating at a specific temperature for a period of time, the surface of the spandex filaments melts, causing the spandex filaments between the coils to bond together to form a mesh structure. This achieves the effect of the coil structure being less prone to detachment and without frayed edges. The interlocking structure of the air layers prevents the fabric from curling at the edges, thus enabling free cutting.

[0029] Please see Figures 1 to 2 The present invention provides an embodiment: a method for manufacturing a weft-knitted free-cut knitted fabric, characterized in that the manufacturing method includes a knitting process, wherein a double-sided circular knitting machine is used to produce the fabric greige; the double-sided circular knitting machine has BABABABA needles on the needle plate and ABABABAC needles on the cylinder, and adopts a double-sided needle position;

[0030] In the first row, needle A floats the yarn in the first track of the needle plate, and needle B gathers the yarn in the second track; needle A floats the yarn in the first track of the needle cylinder, needle B forms the loop in the second track, and needle C gathers the yarn in the third track; ordinary spandex is fed into the first row.

[0031] In the second row, the first and second tracks of the needle plate form loops with needles A and B; the first, second, and third tracks of the needle cylinder have needles A, B, and C floating yarns; the second row feeds nylon and ordinary spandex.

[0032] In the third row, the first and second tracks of the needle plate are knitting needles A and B with floating yarn; the first, second and third tracks of the needle cylinder are knitting needles A, B and C in loops; the third row is filled with nylon and ordinary spandex.

[0033] In the 4th row, needle A is tucked in the first track of the needle plate, and needle B is floated in the second track; needle A is tucked in the first track of the needle cylinder, and needles B and C are floated in the second and third tracks; ordinary spandex is fed into the 4th row.

[0034] Routes 5, 8, 11, 14, and 17 are the same as route 2 in terms of weaving method;

[0035] Routes 6, 9, 12, 15, and 18 are the same as route 3 in terms of weaving method;

[0036] The weaving method for routes 10 and 16 is the same as that for route 4;

[0037] The weaving method for the 7th row is the same as that for the 1st row;

[0038] In the 13th row, the first track of the needle plate is for floating yarn on needle A, and the second track is for knitting needle B in a clustered loop; the first track of the needle cylinder is for floating yarn on needle A, and the second and third tracks are for knitting needles B and C in a clustered loop; the 13th row is for ordinary spandex.

[0039] The first to the 18th rows form one cycle, and this process is repeated to form the fabric greige.

[0040] The raw materials used are a blend of nylon yarn and ordinary spandex. Nylon yarn is soft and comfortable, enhancing the wearer's comfort, while spandex helps prevent the loops from unraveling and leaves no frayed edges. Specific weaving techniques are as follows... Figure 2 As shown in the figure, H represents yarn and G represents needle.

[0041] Please continue reading. Figures 1 to 2 As shown, in another embodiment of the present invention, the needle plate of the double-sided circular knitting machine is BABABABA, the needle cylinder is ABABABAC, and a double-sided needle position is adopted.

[0042] Please continue reading. Figures 1 to 2 As shown, in another embodiment of the present invention, the manufacturing method further includes a pre-forming process, a dyeing and finishing process, and a finished product setting process, wherein the dyeing and finishing process includes the following steps:

[0043] Step S1: First, add water to the dyeing vat, then add soft water. At a liquor ratio of 1:10 to 1:30, and at room temperature, place the fabric into the vat. First, add 0.1 g / L of acidic leveling agent, then add the dye; next, add 0.4 g / L of dyeing accelerator. First, raise the temperature at a rate of 0.6–1.5°C per minute, reaching 98°C and holding for 40 minutes. Then, lower the temperature at a rate of 0.6–1.5°C per minute until it reaches 80°C. Add 2 g / L of caustic soda flakes and 4 g / L of sodium hydrosulfite, holding for 20 minutes. Then, lower the temperature again at a rate of 0.6–1.5°C per minute until it reaches 55°C. Cut a sample for color matching, and after accurate matching, drain the water. Wash twice and drain again. The acidic leveling agent used is LEK-5207.

[0044] Step S2: Refill with soft water, first add 0.2 g / L of dyeing acid DA, then 0.6 g / L of acidic fixing agent, followed by 0.1 g / L of oligomer dispersant remover. Then raise the temperature at a rate of 0.6–1.5 °C per minute to 70 °C and maintain this temperature for 30 minutes. Finally, lower the temperature at a rate of 0.6–1.5 °C per minute to 55 °C. Cut the fabric for color matching, ensuring accuracy, then drain the water. Wash twice and drain again. The oligomer dispersant remover is OLG-PA.

[0045] Please continue reading. Figures 1 to 2 As shown, in another embodiment of the present invention, the pre-forming process is performed before the dyeing vat. The pre-forming process includes heat-treating the fabric at a certain temperature for a period of time, causing the surface of the ordinary spandex to melt so that the ordinary spandex between the loops adheres to each other to form a mesh structure. The pre-forming temperature is 195–210°C, and the pre-forming speed is 5–30 m / min.

[0046] Please continue reading. Figures 1 to 2 As shown, in another embodiment of the present invention, the finished product setting process includes setting the knitted fabric after the dyeing and finishing process, and impregnating it with a softening agent during the finished product setting process to make the fabric softer and more comfortable. The temperature of the finished product setting process is 130-145°C, and the setting speed is 15-30 m / min.

[0047] Please continue reading. Figures 1 to 2 As shown, in another embodiment of the present invention, the dye contains 0.86% Flexit Yellow FA-M, 0.22% Flexit Red FA-M, 3.5% Acid Black MS-F, and 0.18% Disperse Black PLUS. The contents are calculated relative to the weight of the fabric.

[0048] The present invention has the following working principle: In summary, the present invention adopts an air layer jacquard structure, and uses ordinary spandex. Through a special structural design, it is heat-treated at a specific temperature for a period of time, so that the surface of the spandex yarn melts and the spandex yarn between the loops sticks together to form a mesh structure, so as to achieve the effect that the loops at the cut position of the knitted fabric are not easy to unravel, frayed, or curled, and realize the function of free cutting.

[0049] The above description is only a preferred embodiment of the present invention and should not be construed as a limitation of this application. All equivalent changes and modifications made in accordance with the scope of the patent application of the present invention should be covered by the present invention.

Claims

1. A method of making a weft-knitted free-cutter knit fabric, characterized in that, The manufacturing method comprises a weaving process, in which a double-deck circular knitting machine is used to manufacture the fabric grey cloth; the needle plate knitting needles of the double-deck circular knitting machine are BABABABA, the needle cylinder knitting needles are ABABABAC, and double-deck needle positions are used; In the first route, the needle plate first track knitting needle A floats, and the second track knitting needle B tuck; the needle cylinder first track knitting needle A floats, the second track knitting needle B loops, and the third track knitting needle C tuck, and the first route is fed with ordinary spandex; in the second route, the needle plate first and second track knitting needles A and B loop; the needle cylinder first, second and third track knitting needles A, B and C float, and the second route is fed with nylon and ordinary spandex; In the third route, the needle plate first and second track knitting needles A and B float; the needle cylinder first, second and third track knitting needles A, B and C loop, and the third route is fed with nylon and ordinary spandex; In the fourth route, the needle plate first track knitting needle A tuck, and the second track knitting needle B floats; the needle cylinder first track knitting needle A tuck, and the second and third track knitting needles B and C float, and the fourth route is fed with ordinary spandex; Routes 5, 8, 11, 14 and 17 are the same as the weaving method of the second route; Routes 6, 9, 12, 15 and 18 are the same as the weaving method of the third route; Routes 10 and 16 are the same as the weaving method of the fourth route; The seventh route is the same as the first route; In the thirteenth route, the needle plate first track knitting needle A floats, and the second track knitting needle B tuck; the needle cylinder first track knitting needle A floats, and the second and third track knitting needles B and C tuck, and the thirteenth route is fed with ordinary spandex; Routes 1 to 18 are one cycle, and the fabric grey cloth is woven in this way.

2. A method of making a weft-knitted free-cutter knit fabric according to claim 1, characterized in that: The manufacturing method further comprises a pre-setting process, a dyeing and finishing process and a finished product setting process, and the dyeing and finishing process comprises the following steps: In step S1, water is first put into the dyeing vat, and then soft water is injected; under the condition of a bath ratio of 1:10 to 1:30 and room temperature, the fabric grey cloth is put into the dyeing vat, 0.1 g / L of acid levelling agent is first added, and then dye is added; then 0.4 g / L of dyeing accelerator is added; the temperature is first raised at a rate of 0.6 to 1.5 ℃ per 1 minute, and when the temperature is raised to 98 ℃, it is kept for 40 minutes; then the temperature is lowered at a rate of 0.6 to 1.5 ℃ per minute, and when the temperature is lowered to 80 ℃, 2 G / L of sheet alkali and 4 G / L of insurance powder are added, and kept for 20 minutes; then the temperature is lowered at a rate of 0.6 to 1.5 ℃ per minute, and when the temperature is lowered to 55 ℃, the cloth is cut and sampled for color matching; after the color is accurate, the water is drained, and the cloth is washed twice and drained; In step S2, soft water is injected again, 0.2 g / L of dyeing acid DA is first added, then 0.6 g / L of acid fixing agent is added, and then 0.1 g / L of vat cleaning oligomer dispersing agent is added; then the temperature is raised at a rate of 0.6 to 1.5 ℃ per 1 minute, and when the temperature is raised to 70 ℃, it is kept for 30 minutes; finally, the temperature is lowered at a rate of 0.6 to 1.5 ℃ per minute, and when the temperature is lowered to 55 ℃, the cloth is cut and sampled for color matching; after the color is accurate, the water is drained, the cloth is washed twice and drained, and the fabric is taken out of the vat.

3. A method of making a weft-knitted free-cutter knit fabric according to claim 2, characterized in that: The pre-setting process is operated before the fabric is put into the dyeing vat, and the pre-setting process comprises that the fabric is heat treated at a certain temperature for a period of time, so that the surface of the ordinary spandex is melted and the ordinary spandex between the loops is adhered to each other to form a net structure; the pre-setting temperature is 195 to 210 ℃, and the pre-setting speed is 5 to 30 m / min.

4. The method of claim 2, wherein: The product setting process includes product setting of the knitted fabric after the dyeing and finishing process, and soft finishing agent is impregnated during the product setting, the temperature of the product setting is 130-145 DEG C, and the speed of the product setting is 15-30 m / min.

5. A method of making a weft-knitted free-cutter knit fabric according to claim 2, characterized in that: The content of the Cibacete Yellow FA-M is 0.86%, the content of the Cibacete Red FA-M is 0.22%, the content of the Acid Black MS-F is 3.5%, and the content of the Disperse Black PLUS is 0.18%, and the content is calculated relative to the weight of the fabric.

6. A weft knitted free-cutter fabric produced by the method of claim 1, wherein: the weft knitted free-cutter fabric is characterized by: The fabric includes an air layer jacquard structure, the air layer jacquard structure includes three layers of a bottom layer, an intermediate layer and a surface layer, the bottom layer is below the intermediate layer, the surface layer is above the intermediate layer, the bottom layer is interwoven with nylon yarn and ordinary spandex, the intermediate layer is connected with ordinary spandex and extends to the surface layer, and the surface layer is interwoven with nylon yarn and ordinary spandex.

7. A weft-knitted free-cutter knit fabric according to claim 6, characterized in that: The ordinary spandex is mutually adhered to form a reticular structure among the three layers of the bottom layer, the intermediate layer and the surface layer.

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