Weft-knitted double-sided knitted fabric and preparation method thereof

Abstract

The present invention discloses a method for preparing a weft-knitted double-sided fabric, comprising a fabric having a front and back weft-knitted double-sided structure, wherein both the front and back sides of the fabric are knitted with yarn to form a plurality of loops, each of which has a needle loop, a loop post, and a sinker loop. The loops on the front and / or back sides of the fabric are knitted with a first elastic yarn, a second elastic yarn, and an inelastic yarn, wherein the first elastic yarn and the inelastic yarn are looped on both the upper needle plate and the lower needle cylinder of a knitting machine, and the second elastic yarn is looped only on the front or back side of the fabric, so that the first elastic yarn and the second elastic yarn are present at the needle loop and the loop post on the loops on the front or back side of the fabric. The presence of the two-ply elastic yarn enhances the friction and cohesion between the inelastic yarn and the elastic yarn, and the second elastic yarn exerts a weft-direction tension at the intersection of the loop post and the sinker loop. The present invention makes the fabric more compact, less likely to fall apart, and can be cut arbitrarily, and imparts higher elasticity and stronger resilience to the fabric.

Description

Technical Field

[0001] The invention belongs to the technical field of textile fabrics, in particular to a weft-knitted double-sided fabric and a preparation method thereof. Background Art

[0002] With the booming development of national fitness activities, people's lifestyles have undergone tremendous changes. In cities large and small, spending for health has become a new trend to improve quality of life. In turn, people are paying more and more attention to the wearability of sports fabrics, placing higher demands on various aspects such as recovery and comfort.

[0003] Patent CN215328603U provides a design and implementation method for a weft-knitted double-sided fabric with high recovery, high bulk, and high softness. Although this method achieves high elasticity and large opening, due to the presence of the inelastic side, the fabric of this structure is easy to unravel in the opposite weaving direction, and the side of the inelastic yarn is prone to snags and pilling, which will cause various inconveniences in actual production and use.

[0004] Patent CN101357005A provides a design and implementation method for weft-knitted fabrics that achieve anti-fraying effects by using heat-sealable elastic yarn. However, this method requires heat-sealable elastic yarn, which is costly and has unstable heat-seal properties. High-temperature processing of the heat-sealable elastic yarn also significantly reduces its elasticity.

[0005] Therefore, there is a great market demand for a fabric that has a tight feel, is not easy to fall apart, and has high elasticity and a large opening. Summary of the Invention

[0006] In order to solve the above technical problems, the present invention provides a weft-knitted double-sided fabric and a preparation method thereof.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] A method for preparing a weft-knitted double-sided fabric comprises the following steps:

[0009] The invention relates to a fabric with a weft-knitted double-sided structure having a front side and a back side, wherein both the front side and the back side of the fabric are woven into a plurality of loops by yarn, and the loops have needle loops, loop columns and sinker loops;

[0010] The loops on the front and / or back of the fabric are woven with a first elastic yarn, a second elastic yarn, and an inelastic yarn. The first elastic yarn and the inelastic yarn are looped on both the upper needle plate and the lower needle cylinder of the knitting machine, and the second elastic yarn is looped only on the front or back of the fabric. The first elastic yarn and the second elastic yarn are present at the needle loops and the loop posts of the loops on the front or back of the fabric. The first elastic yarn and the second elastic yarn form a double-ply elastic yarn. The presence of the double-ply elastic yarn enhances the friction and cohesive force between the inelastic yarn and the elastic yarn. The second elastic yarn exerts a weft-direction tension at the intersection of the loop post and the sinker loop.

[0011] As a further solution, at least one of the first elastic yarn, the second elastic yarn and the inelastic yarn is provided.

[0012] As a further solution, the elastic force and thickness of the first elastic yarn and the second elastic yarn are the same or different.

[0013] As a further solution, the fabric is a weft-knitted single rib structure or a weft-knitted double rib structure.

[0014] As a further solution, a single-sided woven non-elastic yarn is further added to the fabric, and the single-sided woven non-elastic yarn is looped only on one side of the fabric.

[0015] As a further solution, the non-elastic yarn is a long fiber with a denier of 10D-200D, preferably 20D-150D.

[0016] As a further solution, the non-elastic yarn is a staple yarn with a count of 8S-200S, preferably 20S-120S.

[0017] As a further solution, the first elastic yarn and the second elastic yarn are both polyurethane elastic fibers with a denier of 10D-200D, preferably 20D-105D.

[0018] As a further solution, the knitting machine used for the fabric is a weft knitting circular knitting machine, and the machine model is E16-E60.

[0019] A weft-knitted double-sided fabric is prepared using the above-mentioned preparation method.

[0020] Compared with the prior art, the present invention has the following beneficial technical effects:

[0021] By weaving elastic yarn and non-elastic yarn on different sides, tension is generated in the weft direction, making the fabric tighter and less likely to fall apart. It can be cut at will and gives the fabric higher elasticity and stronger recovery, with good recovery and comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the complete weaving state of the flower paper of Example 1;

[0023] Figure 2 This is a schematic diagram of the complete weaving state of the flower paper of Example 2;

[0024] Figure 3 This is a schematic diagram of the complete weaving state of the flower paper of Example 3;

[0025] Figure 4 Schematic diagram of the coil structure. DETAILED DESCRIPTION

[0026] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and are not to be construed as limiting the present invention.

[0027] In the description of the present invention, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like are used to indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0028] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, removable connections, or integral connections. They may refer to mechanical connections or electrical connections. They may refer to direct connections or indirect connections through an intermediary, and they may refer to internal communication between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0029] A method for preparing a weft-knitted double-sided fabric comprises the following steps:

[0030] refer to Figure 4 As shown, it comprises a weft-knitted double-sided fabric with a front side and a back side, wherein both the front side and the back side of the fabric are woven into a plurality of loops by yarn, and the loops have a needle loop 1, a loop column 2 and a sinker loop 3;

[0031] The loops on the front side of the fabric are woven by a first elastic yarn, a second elastic yarn and a non-elastic yarn, and the first elastic yarn and the non-elastic yarn are looped on both the upper needle plate and the lower needle cylinder of the knitting machine, i.e., they are looped at two positions, and the second elastic yarn is looped only on the front side of the fabric, i.e., it is looped only at one position, usually the upper needle plate, so that the loops on the front side of the fabric have the first elastic yarn and the second elastic yarn at the needle loop and the loop post. The presence of the two-ply elastic yarn enhances the friction and cohesion between the non-elastic yarn and the elastic yarn. At the same time, the second elastic yarn exerts a weft-direction pulling force at the intersection of the loop post and the sinker loop of the loop, forming a pulling force, making the fabric tighter, not easy to fall apart, and can be cut at will, and giving the fabric higher elasticity and stronger recovery.

[0032] During specific knitting, the knitting machine is controlled so that the first elastic yarn and the non-elastic yarn are knitted together, while the second elastic yarn is knitted into loops on one side of the fabric alone.

[0033] By alternately weaving two elastic yarns and one inelastic yarn, while simultaneously connecting and bonding them, the fabric's unraveling resistance is enhanced. During knitting, the first elastic yarn and the inelastic yarn are both knitted together, forming upper and lower loops, while the second elastic yarn is looped only on one side. Therefore, the second elastic yarn overlaps one of the loops formed by the first and inelastic yarns, leveraging the mutual pulling between the different yarns to improve overall unraveling resistance.

[0034] The elastic force and thickness of the first elastic yarn and the second elastic yarn are the same or different. Moreover, a plurality of the first elastic yarn and the second elastic yarn can be provided, and a plurality of the inelastic yarn can also be provided.

[0035] In addition, the fabric may also be added with a single-sided woven non-elastic yarn, which is looped only on one side of the fabric.

[0036] The fabric is a weft-knitted single rib structure or a weft-knitted double rib structure.

[0037] The non-elastic yarn is a filament yarn with a denier of 10D-200D, preferably 20D-150D; or the non-elastic yarn is a staple yarn with a count of 8S-200S, preferably 20S-120S. The first and second elastic yarns are both polyurethane elastic fibers or other types of elastic fibers with a denier of 10D-200D, preferably 20D-105D.

[0038] The knitting machine used for the fabric is a weft knitting circular knitting machine, and the machine model is E16-E60, and can be further selected as E28-E60.

[0039] The following is further explained with a production example. The first elastic yarn is defined as elastic yarn A, the second elastic yarn is defined as elastic yarn B, and the inelastic yarn is defined as inelastic yarn C and inelastic yarn D as needed.

[0040] Example 1:

[0041] 1. Yarn selection: Elastic yarn A uses non-thermal fusion ordinary spandex PU 20D, elastic yarn B uses non-thermal fusion ordinary spandex PU 30D, and non-elastic yarn C uses ordinary PA6640D / 51F FD DTY.

[0042] 2. Machine model: double-sided weft knitting machine, 40G, 34 inches.

[0043] 3. Weaving process: The non-elastic yarn C is woven using a weft-knitted double rib method, with a yarn length of 24cm / 100G. The elastic yarn A adopts a plated yarn structure to follow the non-elastic yarn C, with a yarn length of 8.5cm / 100G. The elastic yarn B is only looped on every other needle on the upper needle plate, with a yarn length of 6cm / 100G.

[0044] 4.Weaving flower paper diagram, reference Figure 1 shown.

[0045] 5. Dyeing and finishing process: pre-dyeing - overflow dyeing - dehydration - finishing.

[0046] 6. Finished product parameters: 165cm*230gsm.

[0047] 7. Tested using the LTD03 method, the results are as follows:

[0048] Test items Test results Elongation(Length) 103％ Elongation (Width) 190％ Recovery(Length) longitudinal recovery rate 94％ Recovery(Width) latitudinal recovery rate 92％ Freecut Pass

[0049] Example 2:

[0050] 1. Yarn selection: Elastic yarn A uses non-thermal fusion ordinary spandex PU 40D, elastic yarn B uses non-thermal fusion ordinary spandex PU 30D, and non-elastic yarn C uses ordinary PA6 / PES 60D / 48F / SDRB DTY / FDY.

[0051] 2. Machine model: double-sided weft knitting machine, 32G, 34 inches.

[0052] 3. Weaving process: Non-elastic yarn C is weft-knitted with rib weaving method, with a yarn length of 23cm / 50G. Elastic yarn A adopts plating structure to follow non-elastic yarn C, with a yarn length of 8cm / 50G. Elastic yarn B is only looped on the upper needle plate, with a yarn length of 6cm / 50G.

[0053] 4.Weaving flower paper diagram, reference Figure 2 shown.

[0054] 5. Dyeing and finishing process: pre-dyeing - overflow dyeing - dehydration - finishing.

[0055] 6. Finished product parameters: 150cm*240gsm.

[0056] 7. Tested using the LTD03 method, the results are as follows:

[0057]

[0058]

[0059] Example 3:

[0060] 1. Yarn selection: Elastic yarn A uses non-thermal fusion ordinary spandex PU 20D, elastic yarn B uses non-thermal fusion ordinary spandex PU 30D, non-elastic yarn C uses ordinary PA6640D / 51F FD DTY, and non-elastic yarn D uses ordinary PA620D / 24F FD DTY.

[0061] 2. Machine model: double-sided weft knitting machine, 40G, 34 inches.

[0062] 3. Weaving process: The non-elastic yarn C adopts weft knitting double rib method, with a yarn length of 24cm / 100G. The elastic yarn A adopts a plated yarn structure to follow the non-elastic yarn C, with a yarn length of 8.5cm / 100G. The non-elastic yarn D is only looped on every other needle on the upper needle plate, with a yarn length of 18cm / 100G. The elastic yarn B adopts a plated yarn structure to follow the non-elastic yarn D, with a yarn length of 5.5cm / 100G.

[0063] 4. Woven flower paper, reference Figure 3 shown.

[0064] 5. Dyeing and finishing process: pre-dyeing - overflow dyeing - dehydration - finishing.

[0065] 6. Finished product parameters: 150cm*250gsm.

[0066] 7. Tested using the LTD03 method, the results are as follows:

[0067] Test items Test results Elongation(Length) 95％ Elongation (Width) 150％ Recovery(Length) longitudinal recovery rate 97％ Recovery(Width) latitudinal recovery rate 95％ Freecut Pass

[0068] After testing, the anti-permeability performance of this fabric is good.

[0069] It should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. However, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for preparing a weft-knitted double-sided fabric, characterized in that: The invention comprises the following steps: a fabric having a weft-knitted double-sided structure with a front side and a back side, wherein both the front side and the back side of the fabric are knitted with yarn to form a plurality of loops, and the loops have needle loops, loop posts and sinker loops; the loops on the front side and / or the back side of the fabric are knitted with a first elastic yarn, a second elastic yarn and an inelastic yarn, and the first elastic yarn and the inelastic yarn are looped on both the upper needle plate and the lower needle cylinder of the knitting machine, and the second elastic yarn is looped only on the front side or the back side of the fabric; the first elastic yarn and the second elastic yarn are present at the needle loops and the loop posts of the loops on the front side or the back side of the fabric, the first elastic yarn and the second elastic yarn form a double-strand elastic yarn, the presence of the double-strand elastic yarn enhances the friction and cohesive force between the inelastic yarn and the elastic yarn, and the second elastic yarn exerts a weft-direction tension at the intersection of the loop post and the sinker loop; the fabric is further added with a single-sided knitted inelastic yarn, and the single-sided knitted inelastic yarn is looped only on one side of the fabric.

2. The method for preparing a weft-knitted double-sided fabric according to claim 1, wherein: At least one of the first elastic yarn, the second elastic yarn and the inelastic yarn is provided.

3. The method for preparing a weft-knitted double-sided fabric according to claim 1, wherein: The elastic force and thickness of the first elastic yarn and the second elastic yarn are the same or different.

4. The method for preparing a weft-knitted double-sided fabric according to claim 1, wherein: The fabric is a weft-knitted single rib structure or a weft-knitted double rib structure.

5. The method for preparing a weft-knitted double-sided fabric according to claim 1, wherein: The non-elastic yarn is a long fiber with a denier of 10D-200D.

6. The method for preparing a weft-knitted double-sided fabric according to claim 1, wherein: The non-elastic yarn is short fiber with a count of 8S-200S.

7. The method for preparing a weft-knitted double-sided fabric according to claim 1, wherein: The first elastic yarn and the second elastic yarn are both polyurethane elastic fibers with a denier of 10D-200D.

8. The method for preparing a weft-knitted double-sided fabric according to claim 1, wherein: The knitting machine used for the fabric is a weft knitting circular knitting machine, and the machine model is E16-E60.

9. A weft-knitted double-sided fabric, characterized in that: It is prepared using the preparation method according to any one of claims 1 to 8.

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