A new kind of raised knitted fabric and its preparation method

Abstract

The present application provides a new kind of raised knitted fabric and its preparation method, which comprises a main layer and a raised layer, the raised layer is located at the upper and lower ends of the main layer, the main layer is knitted by polyester composite yarn and elastic spandex yarn, the polyester composite yarn is composed of at least high boiling water shrinkage yarn and low boiling water shrinkage yarn, and the raised layer is formed by pulling the low boiling water shrinkage yarn. The present application uses the different shrinkage of different boiling water shrinkage fibers after heating, combines the shrinkage of elastic spandex yarn, increases the thickness and elasticity of the fabric, and makes the surface of the fabric uneven, so as to achieve the effect of raising and raising without designing the structure of the raised loop, and the raised loop is more fluffy, better in style and softer in touch than the fabric with the structure of the raised loop.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of textiles, in particular to a new type of raised knitted fabric and a preparation method thereof. BACKGROUND

[0002] Common raised fabric can be divided into short fiber velvet and filament velvet according to the type of raised yarn. The short fiber velvet is prone to fiber loss after being raised, and the filament velvet is difficult to raise during the raising process, has a dry and crisp hand feeling, and a bright luster. In addition, the base cloth obtained by weaving has a flat surface and is difficult to raise, and needs to be raised multiple times.

[0003] The prior art with publication number CN 202482550U discloses a raised yarn-dyed jacquard silk fabric with soft hand feeling, which comprises a base layer and a surface layer. The surface layer is a pile layer obtained by raising the yarn in the base layer. The base layer can be a jacquard fabric layer or a more delicate yarn-dyed jacquard silk fabric layer. In this prior art, the following problems exist: (1) the fabric is relatively flat and difficult to raise, and needs to be raised multiple times; (2) cotton yarn is used as the weaving raw material, which is soft but has poor three-dimensional effect, and the raised fabric is not resistant to washing and is prone to deformation; and (3) the pile is not high in density and has poor warmth retention effect. SUMMARY

[0004] Therefore, the present application aims to provide a new type of raised knitted fabric and a preparation method thereof, so as to solve the problems in the prior art that the fabric is relatively flat and difficult to raise, needs to be raised multiple times, uses cotton yarn as the weaving raw material, which is soft but has poor three-dimensional effect, the raised fabric is not resistant to washing and is prone to deformation, and the pile is not high in density and has poor warmth retention effect.

[0005] To achieve the above-mentioned purposes, the technical scheme of the present application is as follows:

[0006] A new type of raised knitted fabric comprises a main body layer and a raised layer, and the raised layer is located at the upper and lower ends of the main body layer. The main body layer is woven from polyester composite yarn and elastic spandex yarn. The polyester composite yarn is composed of at least high-boiling water shrinkage yarn and low-boiling water shrinkage yarn. The raised layer is formed by raising the low-boiling water shrinkage yarn.

[0007] The setting utilizes the different shrinkages of fibers with different boiling water shrinkage rates after being heated, combines the shrinkage of elastic spandex yarn cloth surface, increases the thickness and elasticity of the fabric, and produces a puffy effect on the surface of the fabric, so as to achieve raising without designing a raised puffy structure, and the raised puffy fabric has better raising fluffiness, style and pile feeling than the raised structure fabric.

[0008] Further, the shrinkage rate of the low-boiling water shrinkage yarn is H1, the shrinkage rate of the high-boiling water shrinkage yarn is H2, and H2-H1=5%-20%.

[0009] The setting makes the loops formed by the composite yarn more neat and suitable in height, and more easy to raise when raising. If the difference of the boiling water shrinkage is too high, the spinnability of the composite yarn will be reduced, and the yarn breakage or excessive loop accumulation will occur during weaving, the raising is insufficient, the fabric elasticity is seriously affected, the fabric arches, and the raising style is difficult to control. If the difference of the boiling water shrinkage is too low, it is difficult to form loops, and the fabric elasticity and loftiness are poor.

[0010] Further, the low boiling water shrinkage yarn has a fineness of 30D-100D and a single fineness of 0.2-0.7D.

[0011] Further, the high boiling water shrinkage yarn has a fineness of 30D-150D and a single fineness of ≥1.25D.

[0012] The limitation of the high and low boiling water shrinkage yarn in the setting is because the single fineness is large, the boiling water shrinkage is usually large, and it is more suitable for making fabric stems, and the fabric is more crisp; the single fineness is small, the boiling water shrinkage is low, and the rigidity is small, so that the fabric feels more soft and tender on the surface.

[0013] Further, the elastic spandex yarn has a fineness of 20D-50D.

[0014] Further, for preparing the above-mentioned fabric, specifically comprising the following steps: weaving→ flat washing→ setting→ first double-sided raising→ high-temperature setting→ dyeing→ softening treatment→ drying→ second double-sided raising→ double-sided shearing→ shaking→ re-setting.

[0015] Further, in the setting process, the setting temperature is 130-140℃, and the speed is 20-27m / min.

[0016] Further, in the first double-sided raising process, the raising is in the order of hair, and the speed is 8-12m / min.

[0017] Further, in the high-temperature setting process, the setting temperature is 180-190℃, and the speed is 15-30m / min.

[0018] Further, in the softening treatment, a dip and pad method is adopted, and 63g / L of softener, 51g / L of raising agent and 3g / L of penetrating agent are added during the dip and pad.

[0019] Compared with the prior art, the novel raised knitted fabric and the preparation method thereof have the following advantages:

[0020] 1) The fabric of this invention uses polyester composite yarn (combining high-boiling-water shrinkage yarn and low-boiling-water shrinkage yarn) and elastic spandex yarn as raw materials. Utilizing the different heat shrinkage characteristics of high-boiling-water shrinkage yarn and low-boiling-water shrinkage yarn, heat setting creates an uneven surface on the fabric, reducing the difficulty of napping, shortening the napping process, and lowering costs. Furthermore, the polyester composite yarn used in the fabric is an ultra-fine denier polyester fiber composite filament, resulting in a delicate, soft, and smooth surface with a gentle luster and a comfortable feel against the skin after napping.

[0021] 2) The fabric in this invention undergoes two pre-forming and two napping processes, making it easier to nap, resulting in a denser, softer, and more skin-friendly feel. Compared to ordinary napped fabrics, it is less prone to fiber shedding, and the napped style can be maintained for a longer period of time. Attached Figure Description

[0022] Fig. 1 This is a diagram showing the weaving structure of the fabric of the present invention;

[0023] Fig. 2 This is a schematic diagram of the overall structure of the fabric of the present invention.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1-Main layer, 2-Fluffing layer, 3-Elastic spandex yarn, 4-Polyester composite yarn. Detailed Implementation

[0026] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] Example 1

[0028] like Figs. 1-2 As shown, a novel napped knitted fabric includes a main body layer 1 and a napped layer 2. The napped layer 2 is located at the upper and lower ends of the main body layer 1. The main body layer is woven from polyester composite yarn and elastic spandex yarn. The polyester composite yarn is composed of at least high boiling water shrinkage yarn and low boiling water shrinkage yarn. The napped layer is formed by napping low boiling water shrinkage yarn.

[0029] Furthermore, the high-boiling-water shrinkage yarn and the elastic spandex yarn are heat-set to form the main body layer, the low-boiling-water shrinkage yarn is heat-set to form a loop effect, and the loop is brushed to form a napped layer.

[0030] Furthermore, the spinning method of polyester composite yarn can be one of POY, DTY, FDY, or any combination of both.

[0031] Furthermore, the shrinkage rate of low-boiling-water shrinkage yarn is H1, and the shrinkage rate of high-boiling-water shrinkage yarn is H2, where H2-H1 = 5%-20%.

[0032] Further, the low boiling water shrinkage yarn has a fineness of 30D-100D and a single fineness of 0.2-0.7D.

[0033] Further, the high boiling water shrinkage yarn has a fineness of 30D-150D and a single fineness of ≥1.25D.

[0034] Further, the elastic spandex yarn has a fineness of 20D-50D.

[0035] Further, the polyester composite yarn and the elastic spandex yarn are fed simultaneously when the fabric is knitted.

[0036] Further, the main body layer adopts a plating cotton stitch, and further, two paths are knitted in one cycle to obtain a blank, and each path adopts the polyester composite yarn as a face yarn and the elastic spandex yarn as a ground yarn, and the face yarn and the ground yarn are fed simultaneously when being knitted; due to the existence of the elastic spandex yarn, the main body of the blank is tightened, but the surface loops are fluffy, and the fabric as a whole presents an inside-tight and outside-loose state.

[0037] Further, the loop length formed by the polyester composite yarn is 14-19 cm / 50 needles.

[0038] Further, the loop length formed by the elastic spandex yarn is 5.4-7 cm / 50 needles.

[0039] Further, the machine used for weaving is a weft-knitting double-sided large circular machine, the needle pitch is 20G-28G, and the fabric knitted by the weft-knitting double-sided large circular machine has a weight of 150-400 g.

[0040] The composition of the polyester composite yarn can be a single component, such as a PET fiber, a PBT fiber or a PTT fiber. It can also be a mixture of a single component and a double component, and the double component can be PET / PBT, PET / PTT, PBT / PTT. The blending ratio of the double component is not particularly limited, but considering the elasticity of the fabric, the double component can be selected as 30~70 / 70~30, preferably 50 / 50 or 60 / 40. PET is polyethylene terephthalate, PBT is polybutylene terephthalate, and PTT is polytrimethylene terephthalate.

[0041] The manufacturing method of the polyester composite yarn is to ply the high boiling water shrinkage yarn and the low boiling water shrinkage yarn and twist to form the polyester composite yarn. Since the shrinkage rate of the high boiling water shrinkage yarn is higher than that of the low boiling water shrinkage yarn, when the polyester composite yarn and the elastic spandex yarn are knitted, the high boiling water shrinkage yarn is tightly combined with the main body layer of the fabric after heat treatment, and the low boiling water shrinkage yarn produces a loop effect after heat treatment, and at the same time, the high boiling water shrinkage yarn further fixes the low boiling water shrinkage yarn during heat treatment to prevent the low boiling water shrinkage yarn from deforming when being pulled.

[0042] The difference in shrinkage between high boiling water shrinkage yarn and low boiling water shrinkage yarn is mainly affected by the temperature and time of heat treatment in spinning and drawing processes.

[0043] Embodiment 2

[0044] A method for preparing a new type of raised knitted fabric, the fabric prepared in Embodiment 1, specifically comprising the following steps:

[0045] Weaving → flat water washing → setting → first double face raising → high temperature setting → dyeing → softening treatment drying → second double face raising → double face shearing → shaking grain → re-setting.

[0046] Specifically, comprising the following steps:

[0047] A) Weaving: using a 28G double face weft knitting circular machine, polyester composite yarn and elastic spandex yarn are knitted into a fabric; the polyester composite yarn uses 70D / 156F composite yarn, which is composed of 30D / 12F (FDY) PET filament and 40D / 144F (DTY) PET filament, and the elastic spandex yarn is 20D;

[0048] B) Flat water washing: the flat process is flat desizing water washing, the temperature is 60℃-80℃-90℃-90℃-80℃-60℃ in turn. Until the sizing attached to the fabric is completely washed out, it is convenient for subsequent dyeing and raising.

[0049] C) Setting: the fabric is put into a setting machine for setting, the low temperature setting temperature is 130℃, and the speed is 25m / min; first pre-setting to make the fabric surface have obvious concave-convex effect, which is beneficial to raising;

[0050] D) First double face raising: raising, requiring smooth raising, speed 8-12m / min;

[0051] F) High temperature setting: setting temperature is 180℃, speed is 15-30m / min;

[0052] F) Dyeing: according to bath ratio 1:8, using disperse dye for dyeing, adding 0.2g / l metal chelating agent, 1.0% high temperature leveling agent and 0.5g / l glacial acetic acid, heating to 125℃, running for 20min; cooling to 80℃ to discharge; then reducing cleaning of the fabric, adding 1.0g / l acid reducing cleaning agent, heating to 70℃ for 30min;

[0053] G) Softening treatment: softening finishing of the dyed fabric is carried out by one dip one padding method, adding softener 63g / L, raising agent 51g / L and penetrating agent 3g / L during dip padding;

[0054] H) Drying: the softening treated fabric is put into a drying machine, the drying temperature is 120℃, and the time is 60min;

[0055] I) Second double face raising: raising, requiring raising in the grain, at a speed of 8-12 m / min;

[0056] G) Double face shearing: shearing speed of 20 / min, shearing knife speed of 800 rpm, shearing knife distance of 0.5 inches;

[0057] K) Shaking: temperature setting of 70℃, time of 20 minutes, cooling time of 5 minutes;

[0058] L) Repetitive setting: setting temperature of 140℃, speed of 20 m / min.

[0059] Example 3

[0060] A method for preparing a new type of raised knitted fabric, the fabric prepared in Example 1, specifically comprising the following steps:

[0061] Weaving→flat washing→setting→first double face raising→high temperature setting→dyeing→softening treatment→drying→second double face raising→double face shearing→shaking→repetitive setting;

[0062] Specifically, comprising the following steps:

[0063] A) Weaving: using a 24G double face weft knitting circular machine, polyester composite yarn and elastic spandex yarn are knitted into a fabric; the polyester composite yarn uses 90D / 108F composite yarn, which is composed of 50D / 24F (FDY) PET / PPT bi-component filament and 40D / 72F (DTY) single-component PET filament, wherein the PET / PPT bi-component blending ratio is 60 / 40, and the elastic spandex yarn is 30D;

[0064] B) Flat washing: flat process is flat desizing and washing, temperature is 60℃-80℃-90℃

[0065] -90℃-80℃-60℃. Until the sizing attached to the fabric is completely washed out, facilitating subsequent dyeing and raising.

[0066] C) Setting: setting the fabric in a setting machine, setting temperature is 140℃, speed is 27 m / min; first pre-setting to make the fabric surface concave-convex effect obvious, which is beneficial to raising;

[0067] D) First double face raising: raising, requiring raising in the grain, speed of 9 m / min;

[0068] E) High temperature setting: setting temperature is 185℃, speed is 27 m / min;

[0069] F) dyeing: dyeing according to a bath ratio of 1:8 by using disperse dyes, adding 0.3 g / l metal chelating agent, 1.5% high temperature leveling agent and 0.7 g / l glacial acetic acid, heating to 130°C, running for 40 min; cooling to 80°C to drain; then reducing cleaning is performed on the fabric, adding 2.0 g / l acid reducing cleaning agent, heating to 80°C for 15 min;

[0070] G) softening treatment: softening finishing is performed on the dyed fabric by using one-dip-one-nip method, adding softener 63 g / L, raising agent 51 g / L and penetrating agent 3 g / L during dip-nip;

[0071] H) drying: the softening treated fabric is put into a drying machine, the drying temperature is 110°C, and the time is 30 min;

[0072] I) second double-side raising: raising is performed at a speed of 9 m / min;

[0073] G) double-side shearing: the shearing speed is 25 m / min, the shearing knife speed is 1200 rpm, and the shearing knife distance is 1.0 inch;

[0074] K) shaking grain: the temperature is set to 70°C, the time is 20 min, and the cooling time is 5 min;

[0075] L) re-setting: the setting temperature is 140°C, and the speed is 20 m / min.

[0076] Example 4

[0077] A preparation method of a new type of raised knitted fabric, the fabric prepared in Example 1, specifically comprising the following steps;

[0078] weaving→flat washing→setting→first double-side raising→high temperature setting→dyeing→softening treatment→drying→second double-side raising→double-side shearing→shaking grain→re-setting;

[0079] Specifically, comprising the following steps:

[0080] A) weaving: using a 24G double-side weft knitting circular machine, polyester composite yarn and elastic spandex yarn are knitted into a fabric; the polyester composite yarn uses 105D / 300F composite yarn, which is composed of 30D / 12F (FDY) PET filament and 75D / 288F (DTY) PET filament, and the elastic spandex yarn is 50D;

[0081] B) flat washing: flat process is flat desizing and washing, the temperature is 60°C-80°C-90°C-90

[0082] °C-80°C-60°C in turn. Until the sizing attached to the fabric is completely washed out, it is convenient for subsequent dyeing and raising.

[0083] C) setting: the cloth is put into the setting machine, the temperature is set to 130℃, and the speed is 20m / min; pre-setting is carried out to make the fabric surface have obvious concave-convex effect, which is beneficial to the pulling of the hair;

[0084] D) first double-sided pulling of hair: the hair is pulled, and the speed is 10m / min;

[0085] E) high-temperature setting: the setting temperature is 190℃, and the speed is 20m / min;

[0086] F) dyeing: the fabric is dyed according to the bath ratio of 1:8, and the dispersion dye is used, 0.5g / l metal chelating agent, 2.0% high-temperature leveling agent and 1.0g / l glacial acetic acid are added, the temperature is raised to 135℃, and the running time is 60min; the temperature is lowered to 80℃ to discharge the liquid; then the fabric is subjected to reduction cleaning, 3.0g / l acid reduction cleaning agent is added, the temperature is raised to 90℃, and the treatment time is 10min;

[0087] G) softening treatment: the dyed fabric is subjected to softening finishing, and a dip-nip method is used, 63g / L softening agent, 51g / L raising agent and 3g / L penetrating agent are added during dip-nip;

[0088] H) drying: the softening treated fabric is put into the drying machine, the drying temperature is 120℃, and the time is 10min;

[0089] I) second double-sided pulling of hair: the hair is pulled, and the speed is 10m / min;

[0090] G) double-sided cutting of hair: the cutting speed of the hair is 30m / min, the cutting speed of the hair cutter is 1500rpm, and the distance of the hair cutter is 2.0inches;

[0091] K) shaking of particles: the temperature is set to 70℃, the time is 20min, and the cooling time is 5min;

[0092] L) re-setting: the setting temperature is 140℃, and the speed is 20m / min.

[0093] Comparative Example 1

[0094] The difference between the comparative example 1 and the example 4 is that the yarn is woven to form the fabric according to the public number CN202482550U;

[0095] Comparative Example 2

[0096] The difference between the comparative example 2 and the example 4 is that the fabric does not go through the setting and the first double-sided pulling of hair process;

[0097] Experimental Example

[0098] The finished fabrics of Examples 1-4 and Comparative Examples 1-2 are prepared, and performance tests are carried out according to the national standard AATCC textile test standard, and the test results are shown in Table 1.

[0099] Table 1: Test results of the napped knitted fabric

[0100]

[0101]

[0102] The finished fabric obtained by the application has good mechanical properties, neat cloth surface, no hair drop, good warmth retention, soft and delicate, fluffy and elastic, warm and fuzzy feeling, and high color fastness after washing.

[0103] Although the application is disclosed as above, the application is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the application, and the protection scope of the application should be subject to the scope defined by the claims.

Claims

1. A novel napped knitted fabric, characterized in that, The structure includes a main layer and a napped layer, with the napped layer located at the top and bottom ends of the main layer. The main layer is woven from polyester composite yarn and elastic spandex yarn. The polyester composite yarn is composed of at least high-boiling-water shrinkage yarn and low-boiling-water shrinkage yarn. The napped layer is formed by napping low-boiling-water shrinkage yarn. The shrinkage rate of the low-boiling-water shrinkage yarn is H1, and the shrinkage rate of the high-boiling-water shrinkage yarn is H2, where H2-H1 = 5%-20%. The loop length formed by the polyester composite yarn is 14-19cm / 50 stitches, and the loop length formed by the elastic spandex yarn is 5.4-7cm / 50 stitches. The weaving machine used is a weft-knitted double-sided circular knitting machine with a needle pitch of 24G-28G. The preparation method of the novel napped knitted fabric specifically includes the following steps: weaving - flat-width washing - setting - first double-sided napping - high-temperature setting - dyeing - softening treatment - drying - second double-sided napping - double-sided shearing - tumbling - resetting; In the shaping process, the shaping temperature is 130-140℃, and the machine speed is 20-27 meters / minute; In the first double-sided napping process, the nap is pulled in the direction of the nap, and the machine speed is 8-12 meters / minute; In the high-temperature setting process, the setting temperature is 180-190℃, and the vehicle speed is 15-30 meters / minute; In the second double-sided napping process, the nap is pulled in the direction of the nap, and the machine speed is 8-12 meters / minute.

2. The fabric according to claim 1, characterized in that, The fineness of the low-boiling-water shrinkage yarn is 30D-100D, and the single fineness is 0.2-0.7D.

3. The fabric according to claim 1, characterized in that, The fineness of the high boiling water shrink yarn is 30D-150D, and the single fiber density is ≥1.25D.

4. The fabric according to claim 1, characterized in that, The elastic spandex yarn has a fineness of 20D-50D.

5. The fabric according to claim 1, characterized in that, In the softening process, a one-dip-one-roll method is used, during which 63 g / L of softener, 51 g / L of napping agent, and 3 g / L of penetrant are added.

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