Ultrahigh-elasticity weft-knitted fabric and preparation method thereof

Abstract

The invention provides an ultrahigh-elasticity weft-knitted fabric and a preparation method thereof. The ultrahigh-elasticity weft-knitted fabric is prepared from the following raw materials in percentage by mass: 19-21% of spandex filaments and 79-81% of nylon filaments. According to the ultrahigh-elasticity weft-knitted fabric, the two pieces of yarn are put in the same path to be woven at the same time through a weft-knitting circular knitting machine, the space of the spandex filaments is reduced and extruded by increasing the weaving density and the proportion of the spandex, the spandex filaments are not prone to snagging, the fabric shows excellent fabric elasticity, and the elasticity of the fabric is improved. Wherein the weft-wise stretching effect can reach 5 times, and the stretching recovery rate can reach about 90%; the ultrahigh-elasticity weft-knitted fabric can be applied to single jersey, and is soft in hand feeling, good in moisture absorption performance and good in elastic recovery performance.

Description

Technical Field

[0001] The invention relates to the technical field of knitted fabrics, and in particular to an ultra-high elastic weft knitted fabric and a preparation method thereof. Background Art

[0002] Knitted fabrics have a series of incomparable wearing properties of woven fabrics. They are soft, moisture-absorbent, breathable, and have certain elasticity and extensibility. Knitted clothing is comfortable to wear, fits the body well, and does not feel restrained.

[0003] However, as people's living standards improve, they have higher and higher requirements for clothing fabrics, not only in terms of comfort, but also in terms of functionality, especially for women in terms of body shaping, which requires both showing individual body curves and maintaining body shape. However, existing knitted fabrics on the market generally have problems with insufficient stretch and recovery.

[0004] Fabric is the material used to make clothes. As one of the three elements of clothing, fabric can not only interpret the style and characteristics of clothing, but also directly affect the color and shape of clothing. When making clothes, the existing fabrics may cause the clothes to tear due to the insufficient elasticity of the fabrics, which may also cause discomfort to people. For this reason, we provide a high-elastic weft knitted fabric to solve the above problems. Summary of the invention

[0005] The invention provides an ultra-high elastic weft knitted fabric and a preparation method thereof, which solves the defect that the elasticity of the existing knitted fabric is still poor.

[0006] The technical solution of the present invention is as follows:

[0007] The invention firstly proposes a super-high elastic weft knitted fabric, which is made of the following raw materials in percentage by mass: 19-21% of spandex filaments and 79-81% of nylon filaments.

[0008] Furthermore, the fineness of the spandex filament is 30-40D, and the fineness of the nylon filament is 40-70D.

[0009] The present invention further proposes a method for preparing a super-elastic weft-knitted fabric, comprising the following steps:

[0010] S1, using a single-sided machine, woven in a one-way-one-cycle manner, wherein each way is woven with a nylon filament and a spandex filament at the same time to obtain a grey fabric;

[0011] S2, the grey cloth fabric is sequentially subjected to water washing and degreasing, pre-setting, dyeing, soaping and fixing, dehydration and final setting to finally obtain the ultra-high elastic weft knitted fabric mentioned above.

[0012] Furthermore, the pre-forming process is: pre-forming at 190° C.-200° C., overfeeding amount 10-40%, vehicle speed 20-30 m / min, and adding 5-20 g / L of anti-yellowing agent in the rolling groove.

[0013] Furthermore, the dyeing process is: dyeing is performed in an overflow dyeing machine by using a cyclic heating method and a method of gradually adding dyes and auxiliaries. Specifically, the cyclic heating method is: adding auxiliaries and dyes at 20-30°C for 30 minutes, heating to 70°C, adding spandex dye blocking agent for 20 minutes, and heating to 98°C and keeping warm for 30 minutes.

[0014] Furthermore, the soaping and fixing process is: soaping and fixing is performed in an overflow dyeing machine by using a cyclic heating method and a method of gradually adding an auxiliary agent. Specifically, the cyclic heating method is: adding a soaping auxiliary agent at 50°C, running for 20 minutes, draining the water, refilling the water, adding a fixing agent at 50°C, running for 20 minutes, and heating to 70°C and keeping the temperature for 30 minutes.

[0015] Furthermore, the process for shaping the finished product is: shaping at 160°C-170°C, overfeeding by 10-40%, speed by 20-30 m / min, and adding 5-10 g / L of moisture wicking agent into the rolling groove.

[0016] Furthermore, the finished product weight of the ultra-high elastic weft-knitted fabric is 110-130 g / m2.

[0017] The beneficial effects of the present invention are as follows: the ultra-high elastic weft knitted fabric of the present invention is formed by placing two yarns on the same path and weaving them simultaneously using a weft knitting circular machine. By increasing the weaving density and the proportion of spandex, the space of the spandex filaments is reduced and squeezed, making it difficult for the spandex filaments to be hooked, and the fabric exhibits excellent fabric elasticity, wherein the weft stretching can reach 5 times the stretching effect, and the stretch recovery rate can reach about 90%; and the ultra-high elastic weft knitted fabric of the present invention can be applied to sweat cloth, has a soft hand feel, good moisture absorption performance, and good elastic recovery performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic structural diagram of the ultra-high elastic weft-knitted fabric of the present invention.

[0020] Figure 2 This is a process diagram of the ultra-high elastic weft-knitted fabric of the present invention. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Example 1

[0023] Reference Figure 1 , a super-elastic weft knitted fabric, comprising the following raw materials in mass percentage: spandex filament 19-21%, nylon filament 79-81%. Specifically, spandex filament can be 19%, 20% or 21%, and the corresponding nylon filament is 81%, 80%, 79%.

[0024] As a further embodiment, the spandex filament has a fineness of 30-40D, and the nylon filament has a fineness of 40-70D. Specifically, the spandex filament may have a fineness of 30, 31, 32, 33, 34, 35, 36, 37, 38, 39 or 40D, and the nylon filament may have a fineness of 40, 42, 45, 48, 50, 53, 55, 57, 60, 62, 65, 68 or 70D.

[0025] The ultra-high elastic weft knitted fabric of the present invention is formed by placing two yarns on the same path and weaving them simultaneously using a weft knitting circular machine. By increasing the weaving density and the proportion of spandex, the space of the spandex filaments is reduced and squeezed, so that the spandex filaments are not easy to be snagged, and the fabric exhibits excellent fabric elasticity, wherein the weft stretching effect can reach 5 times, and the stretch recovery rate can reach about 90%; and the ultra-high elastic weft knitted fabric of the present invention can be applied to sweat cloth, has a soft hand feel, good moisture absorption performance, and good elastic recovery performance.

[0026] Example 2

[0027] Reference Figure 2 , a method for preparing an ultra-high elastic weft knitted fabric, comprising the following steps:

[0028] S1, using a single-sided machine, woven in a one-way-one-cycle manner, wherein each way is woven with a nylon filament and a spandex filament at the same time to obtain a grey fabric;

[0029] S2, the grey cloth fabric is sequentially subjected to water washing and degreasing, pre-setting, dyeing, soaping and color fixing, dehydration and finished product setting to finally obtain the ultra-high elastic weft knitted fabric described in Example 1 or 2.

[0030] As a preferred technical solution, the pre-setting process is: pre-setting at 190°C-200°C, overfeeding amount 10-40%, vehicle speed 20-30 m / min, and adding 5-20 g / L of anti-yellowing agent in the rolling groove.

[0031] As a preferred technical solution, the dyeing process is: dyeing in an overflow dyeing machine by using a cyclic heating method and a method of gradually adding dyes and auxiliaries. Specifically, the cyclic heating method is: adding auxiliaries and dyes at 20-30°C and running for 30 minutes, heating to 70°C and adding spandex dye blocking agent and running for 20 minutes, and heating to 98°C and keeping warm for 30 minutes.

[0032] As a preferred technical solution, the soaping and color fixing process is: soaping and color fixing is performed in an overflow dyeing machine by using a cyclic heating method and a method of gradually adding an auxiliary agent. Specifically, the cyclic heating method is: adding a soaping auxiliary agent at 50°C, running for 20 minutes, draining the water, re-adding water at 50°C, adding a color fixing agent, running for 20 minutes, and heating to 70°C and keeping the temperature for 30 minutes.

[0033] As a preferred technical solution, the process for shaping the finished product is: shaping at 160°C-170°C, overfeeding by 10-40%, speed by 20-30 m / min, and adding 5-10 g / L of moisture wicking agent into the rolling groove.

[0034] As a preferred technical solution, the finished product weight of the ultra-high elastic weft-knitted fabric is 110-130 g / m2.

[0035] Example 3

[0036] Reference Figure 1 , an ultra-high elastic weft knitted fabric, is made of the following raw materials in the following mass percentages: 20% spandex filaments and 80% nylon filaments, the fineness of the nylon filaments is 40D, and the fineness of the spandex filaments is 30D.

[0037] Reference Figure 2 , a method for preparing an ultra-high elastic weft knitted fabric, comprising the following steps:

[0038] (1) A single-sided 34" 32G weft knitting machine is used, with one pass as a cycle, wherein a 40D / 34F nylon filament and a 30D spandex filament are woven simultaneously in the first pass to obtain a grey fabric;

[0039] (2) The grey cloth fabric is sequentially subjected to water washing and degreasing, pre-setting, dyeing, soaping and fixing, dehydration and final setting to finally obtain an ultra-high elastic weft knitted fabric.

[0040] The specific process of pre-setting is as follows: setting at 195°C, overfeeding by 20%, speed of 20 m / min, and adding 5 g / L of anti-yellowing agent into the rolling groove.

[0041] The specific dyeing process is: dyeing in an overflow dyeing machine by a cyclic heating method and a method of gradually adding dyes and auxiliaries; preferably, the cyclic heating method is: adding auxiliaries and dyes at 30°C and running for 30 minutes, heating to 70°C and adding spandex dye inhibitor and running for 20 minutes, heating to 98°C and keeping warm for 30 minutes.

[0042] Among them, the specific process of soaping and fixing is: soaping and fixing are carried out in an overflow dyeing machine by adopting a cyclic heating method and a method of gradually adding auxiliary agents; preferably, the cyclic heating method is: adding a soaping auxiliary agent at 50°C, running for 20 minutes, then draining the water, re-filling the water, adding a fixing agent at 50°C, running for 20 minutes, and then heating to 70°C and keeping warm for 30 minutes.

[0043] The specific process of shaping the finished product is as follows: shaping at 160°C, overfeeding by 10%, speed of 25 m / min, and adding 5 g / L of moisture wicking agent into the rolling groove.

[0044] The performance test of the ultra-high elastic weft knitted fabric prepared in this embodiment is as follows:

[0045]

[0046] The above test results show that the ultra-high elastic weft knitted fabric obtained in this embodiment exhibits excellent fabric elasticity, wherein the weft stretching effect can reach 5 times, and the stretch recovery rate can reach about 90%, which are improved compared with the prior art.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A super-elastic weft-knitted fabric, characterized in that: The invention is made of the following raw materials in percentage by mass: 19-21% of spandex filaments and 79-81% of nylon filaments.

2. The ultra-high elastic weft knitted fabric according to claim 1, characterized in that: The fineness of the spandex filament is 30-40D, and the fineness of the nylon filament is 40-70D.

3. A method for preparing an ultra-high elastic weft knitted fabric, characterized in that: The following steps are involved: S1, using a single-sided machine, woven in a one-way-one-cycle manner, wherein each way is woven with a nylon filament and a spandex filament at the same time to obtain a grey fabric; S2, the grey cloth fabric is sequentially subjected to water washing and degreasing, pre-setting, dyeing, soaping and fixing, dehydration and final setting to finally obtain the ultra-high elastic weft knitted fabric as claimed in claim 1 or 2.

4. The method for preparing the ultra-high elastic weft knitted fabric according to claim 3, characterized in that: The pre-setting process is: pre-setting at 190° C.-200° C., overfeeding amount of 10-40%, vehicle speed of 20-30 m / min, and adding 5-20 g / L of anti-yellowing agent in the rolling groove.

5. The method for preparing the ultra-high elastic weft knitted fabric according to claim 3, characterized in that: The dyeing process is: dyeing is carried out in an overflow dyeing machine by adopting a cyclic heating method and a method of gradually adding dyes and auxiliaries.

6. The method for preparing the ultra-high elastic weft knitted fabric according to claim 5, characterized in that: The cyclic heating method is as follows: adding auxiliary agents and dyes at 20-30° C. and running for 30 minutes, heating to 70° C., adding spandex dye blocking agent and running for 20 minutes, and heating to 98° C. and keeping the temperature for 30 minutes.

7. The method for preparing the ultra-high elastic weft knitted fabric according to claim 3, characterized in that: The process of soaping and fixing color is as follows: soaping and fixing color is performed in an overflow dyeing machine by adopting a cyclic heating method and a method of gradually adding auxiliary agents.

8. The method for preparing the ultra-high elastic weft knitted fabric according to claim 7, characterized in that: The cyclic heating method is as follows: adding a soaping aid at 50° C. and running for 20 minutes, then draining the water, adding a color fixing agent at 50° C. and running for 20 minutes, heating to 70° C. and keeping the temperature for 30 minutes.

9. The method for preparing the ultra-high elastic weft knitted fabric according to claim 3, characterized in that: The process of shaping the finished product is as follows: shaping at 160° C.-170° C., overfeeding by 10-40%, vehicle speed by 20-30 m / min, and adding 5-10 g / L of moisture wicking agent into the rolling groove.

10. The method for preparing the ultra-high elastic weft knitted fabric according to claim 3, characterized in that: The finished product weight of the ultra-high elastic weft-knitted fabric is 110-130 g / m2.

Images