A dyeing and finishing process for imitated plain weave fabric

Abstract

The application provides a dyeing and finishing process of a simulated plain weave fabric. The dyeing and finishing process of the simulated plain weave fabric comprises the following steps: obtaining a fabric grey cloth through one-step oil removal, dyeing, and product setting to obtain a finished product. The fabric obtained through the dyeing and finishing process is good in elasticity, wide and wrinkle-free, and solid and wear-resistant, and effectively avoids the problem of fabric creases caused by uneven fabric shrinkage after dyeing of the simulated plain weave fabric.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of textiles, and relates to a dyeing and finishing process of a simulated woven fabric. BACKGROUND

[0002] Traditional shirts, suits and trousers basically require good crispness and shape retention, therefore, woven fabrics are the best choice for preparing the above products, especially pure cotton woven fabrics, which still occupy a large market share due to their soft hand feeling and comfortable wearing. However, the above products are prone to wrinkling, have no elasticity and have a sense of restraint during wearing and washing, which is also a defect of the structure of woven fabrics. Knitted fabrics are formed by bending yarns into loops and interlocking each other by using knitting needles, and are flexible, so knitted fabrics are beginning to be favored. Weft-knitted fabrics are soft, close-fitting, comfortable to wear and flexible, but have poorer crispness and dimensional stability than woven fabrics, while warp-knitted fabrics have a relatively stable structure and moderate elasticity, can overcome the wrinkling defect of woven fabrics, and have the advantages of softness, comfort and flexibility of knitted fabrics, so warp-knitted fabrics are more in line with the trend of a new generation of high-end outerwear fabrics.

[0003] In order to have elasticity, woven fabrics generally contain spandex, but the spandex may be broken over time. The warp-knitted simulated woven fabric does not use spandex, and PBT / PET double composite yarn is used to increase the elasticity of the fabric, so that the obtained fabric has better elasticity, crispness, wrinkle resistance and durability than woven fabrics.

[0004] However, the PBT / PET double composite yarn fabric has the risk of fabric creases caused by uneven fabric shrinkage after dyeing in the production process, because PBT / PET is a double composite yarn, which is composed of two different polyester fibers by parallel composite spinning. Because the shrinkage ratios of the two fibers are different, the fiber can produce permanent three-dimensional curling, so that the fiber itself has excellent elasticity. Theoretically, the fabric made of PBT / PET composite elastic fiber should also have good thermal shrinkage and bulkiness. The greater the PBT / PET double composite yarn content, the more severe the thermal shrinkage, resulting in serious fabric creases. However, different fabric structures limit the shrinkage of the fiber. The fabric with a loose structure is more prone to shrinkage than the fabric with a tight structure, because the fabric with a loose structure has large pores between the yarns, small interaction, large possibility and space for fiber movement, and its shrinkage law is close to that of a filament. When the fabric structure is loose, the thermal shrinkage rate is high, and the utilization rate of fiber shrinkage is high. The fabric structure with high density is tight, which is not conducive to fiber shrinkage.

[0005] CN106149425A discloses a cotton polyester blended fabric dyeing and finishing method, comprising the following steps: S1 pretreatment, S2, dyeing, S3, softening and shrink-proofing, S4, setting; wherein, the pretreatment step includes cold stacking, oxygen bleaching and mercerizing process in turn, the dyeing step adopts dispersion bath method of disperse dye and reactive dye. The cotton polyester blended fabric dyeing and finishing method of the application not only has simple method, energy saving and low consumption, but also has uniform dyeing, high color fastness, full color and soft hand feeling. However, the process cannot effectively avoid the problem of uneven fabric creases caused by uneven fabric shrinkage after dyeing when preparing PBT / PET double composite yarn.

[0006] CN107503200A discloses a nylon fabric dyeing and finishing process. The nylon fabric dyeing and finishing process of the application comprises the following steps: 1) one-step oil removal and pre-setting: the nylon gray fabric is treated with oil removal agent and simultaneously subjected to high-temperature stretching and pre-setting; 2) dyeing: the nylon fabric after oil removal and pre-setting is placed in a dyeing solution and heated to 90-100℃ for dyeing; 3) setting: the dyed nylon fabric is set; 4) high-temperature mold pressing: the set nylon fabric is subjected to high-temperature mold pressing. The nylon fabric dyeing and finishing process of the application is more environmentally friendly and energy-saving; the prepared nylon fabric has small mold pressing color change, the whiteness after mold pressing can reach above 151; the problems of yellowing after mold pressing and fluorescent flower, yellow spot and other fabric quality problems are effectively prevented; the mold pressing color change is small; the dyed nylon fabric has no defects, the washing fastness and light fastness are above grade 4, the phenol yellow color change fastness grade is as high as grade 4, and the product has good size stability and soft hand feeling. However, the high-temperature stretching and pre-setting dyeing and finishing process of the application is to stretch the PBT / PET double composite yarn at 170-200℃, and the fiber state is fixed. When high-temperature and high-pressure dyeing is carried out, the PBT / PET double composite yarn has small shrinkage change, resulting in poor elasticity, hard hand feeling and light weight of the fabric prepared by the process, which cannot meet the basic requirements of shirts, suits and trousers.

[0007] Therefore, it is urgent to develop a dyeing and finishing process for imitated plain weave fabric. SUMMARY

[0008] In view of the deficiencies of the prior art, the purpose of the application is to provide a dyeing and finishing process for imitated plain weave fabric, which can effectively avoid the problem of uneven fabric creases caused by uneven fabric shrinkage after dyeing.

[0009] To achieve this purpose, the application adopts the following technical solutions:

[0010] One of the purposes of the application is to provide a dyeing and finishing process for imitated plain weave fabric, which comprises the following steps: preparing the fabric gray cloth by one-step oil removal, dyeing and finished product setting.

[0011] Compared with the traditional dyeing and finishing process, the dyeing and finishing process of the present invention can restrain the PBT / PET double composite yarn elastic Poly fabric from shrinking violently when heated by a one-step degreasing dry cloth, and the coils shrink evenly and are neatly arranged, thereby alleviating the degree of thermal shrinkage of the heated PBT / PET double composite yarn elastic Poly, thereby avoiding the problem of creases caused by uneven shrinkage of the heated fabric surface during the drop-dyeing process; the fabric obtained after the dyeing and finishing process has good elasticity, is strong and wear-resistant, and is straight and wrinkle-free, effectively avoiding the problem of fabric creases caused by uneven fabric shrinkage after dyeing of imitation woven fabrics.

[0012] The fabric grey cloth is a PBT / PET double composite yarn fabric;

[0013] Preferably, in the PBT / PET double composite yarn fabric, the mass ratio of PBT to PET is (20-30):(70-80); for example, the mass percentage of PBT in the PBT / PET double composite yarn fabric is 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%, etc., and the sum of the mass percentages of PBT and PET is 100%.

[0014] Preferably, the fabric grey cloth is woven using a warp pile plain weave.

[0015] The specific process of the one-step degreasing and drying method is as follows: the fabric grey cloth is degreased and pre-shrunk at a temperature of 60-80°C using a degreasing agent, and then baked at a temperature of 105-115°C for low-temperature stretching and drying for 20-30 seconds. For example, the time for low-temperature stretching and drying the cloth under temperature conditions of 105°C, 106°C, 107°C, 108°C, 109°C, 110°C, 111°C, 112°C, 113°C, 114°C, and 115°C is 20 seconds, 21 seconds, 22 seconds, 23 seconds, 24 seconds, 25 seconds, 26 seconds, 27 seconds, 28 seconds, 29 seconds, 30 seconds, etc.

[0016] Preferably, the water washing is carried out three times, and the water washing conditions are: the time of each water washing is 1-2 min, for example, 1 min, 1.1 min, 1.2 min, 1.4 min, 1.5 min, 1.6 min, 1.8 min, 2 min, etc., the water washing temperature is 68-72 ° C, for example, 68 ° C, 69 ° C, 70 ° C, 71 ° C, 72 ° C, etc.; the tension ratio is 98-101, for example, 98, 99, 100, 101, and the speed ratio is 15-20, for example, 15, 16, 17, 18, 19, 20, etc.

[0017] Preferably, the deoiling agent is LYS deoiling agent; further, the amount of the deoiling agent is 1 to 5 g / L, for example, 1 g / L, 2 g / L, 3 g / L, 4 g / L or 5 g / L.

[0018] The dyeing process is: the PBT / PET double composite yarn fabric rope in loose state after one-step oil removal is immersed in the overflow dyeing vat under high temperature of 130-135°C and high pressure of 2.5-3.0 Bar for 20-40 min; for example, dyeing at temperature of 130°C, 131°C, 132°C, 133°C, 134°C, 135°C, and high pressure of 2.5 Bar, 2.6 Bar, 2.7 Bar, 2.8 Bar, 2.9 Bar, 3 Bar for 25 min, 30 min, 35 min, 40 min, etc.

[0019] Preferably, the mass of the dye in the dye vat accounts for 0.1-10% of the mass of the PBT / PET double composite yarn fabric; for example, when dyeing dark color, the mass ratio of the dye is 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, etc.; when dyeing light color, the mass ratio of the dye is 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, etc.

[0020] Preferably, the dye is selected from any one or a combination of at least two of Disperse Yellow S-2R, Disperse Red LSF and Disperse Navy Blue SG.

[0021] The dyeing and finishing process when dyeing light color includes the steps of one-step oil removal, dyeing, and high-temperature finished product setting.

[0022] Preferably, the bath ratio during dyeing is 1:6-1:15, for example, 1:7, 1:8, 1:9, 1:10, 1:11, 1:12, 1:13, 1:14, 1:15, preferably 1:12.

[0023] Preferably, the temperature of the high-temperature finished product setting is 160-180°C, for example, 160°C, 161°C, 162°C, 163°C, 164°C, 165°C, 166°C, 167°C, 168°C, 169°C, 170°C, 171°C, 172°C, 173°C, 174°C, 175°C, 176°C, 177°C, 178°C, 179°C, 180°C, etc.

[0024] The dyeing and finishing process when dyeing dark color includes the steps of one-step oil removal, dyeing, semi-finished product high-temperature semi-setting, dye vat fastness washing, and low-temperature finished product setting.

[0025] The specific process of the semi-finished product high-temperature semi-setting is that the dyed PBT / PET double composite yarn fabric is pre-set at a high temperature of 160-180 DEG C, for example, the temperature is 160 DEG C, 165 DEG C, 170 DEG C, 175 DEG C, 180 DEG C, etc.; the speed ratio is 15-20, for example, 15, 16, 17, 18, 19, 20, etc.; the overfeed ratio is 10-20%, for example, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, etc.

[0026] The setting conditions of the low-temperature finished product are that the temperature is 100-120 DEG C, for example, the temperature is 100 DEG C, 101 DEG C, 102 DEG C, 103 DEG C, 104 DEG C, 105 DEG C, 106 DEG C, 107 DEG C, 108 DEG C, 109 DEG C, 110 DEG C, 111 DEG C, 112 DEG C, 113 DEG C, 114 DEG C, 115 DEG C, 116 DEG C, 117 DEG C, 118 DEG C, 119 DEG C, 120 DEG C, etc., the speed ratio is 15-20, for example, 15, 16, 17, 18, 19, 20, etc.; the overfeed ratio is 5-15%, for example, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, etc.

[0027] The softener is added when the low-temperature finished product is set.

[0028] Preferably, the softener is any one of soft oil S150, soft oil P and TM200 or a mixture of at least two thereof.

[0029] Preferably, the mass concentration of the softener is 3-8 g / L, for example, 3 g / L, 4 g / L, 5 g / L, 6 g / L, 7 g / L, 8 g / L, etc.

[0030] The second object of the present application is to provide a simulated woven fabric prepared by the preparation method of any one of the first object.

[0031] Compared with the prior art, the present application has the following beneficial effects:

[0032] The fabric prepared by the dyeing and finishing process has good elasticity, is wrinkle-free and firm and wear-resistant, and effectively avoids the problem of uneven fabric surface shrinkage after dyeing of the simulated woven fabric. Specifically, the prepared fabric has a firm and elastic hand feeling, the longitudinal elongation rate is 20-26%, the transverse elongation rate is 50-51%, the wear resistance grade is 4.5, the purl grade is 4.5, and the flatness grade is 4-4.5. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 The loop structure diagram of the plain weave of Example 1 of the present application;

[0034] Figure 2Schematic diagram of the motion of the filling yarn of the plain pique of Example 1 of the present application;

[0035] Figure 3 Schematic diagram of the flow of the dyeing and finishing process of Example 1. DETAILED DESCRIPTION

[0036] The technical solutions of the present application are further illustrated below in conjunction with the accompanying Figures 1-3 , and by the specific embodiments.

[0037] Unless otherwise specified, the various raw materials of the present application can be commercially available or prepared according to the conventional methods in the art.

[0038] The dyeing and finishing process of the mock-crepe fabric of the present application comprises the following steps: preparing a fabric blank by one-step oil removal drying, dyeing, and product setting.

[0039] Example 1

[0040] This example takes the plain pique in long pants as an example, and the dyeing and finishing process of the mock-crepe fabric is as follows:

[0041] (1) The fabric blank is knitted by using the plain pique, and the knitting conditions are shown in Table 1. GB1 yarn is ordinary PET, and the yarn merchant is Toray, Thailand. GB2 yarn is PBT / PET blended yarn, and the yarn merchant is Toray, Jiangsu. The structure is plain pique, and the loop structure is shown in Figure 1 、 2 The longer extension line of GB2 is bound by the short extension line of GB1, the fabric structure is stable, the anti-pilling performance is good, and the hand feeling is hard and stiff. Among them, Figure 1 is the loop structure diagram of the plain pique, Figure 2 is the motion diagram of the filling yarn of the plain pique.

[0042] The plain pique is knitted with a small let-off amount, and the structure of the blank cloth is tight. During the dyeing and finishing process, the blank cloth shrinks under heat, the boiling water shrinkage of GB1 yarn is low, and it is located on the surface layer of the fabric, and can fully shrink. The boiling water shrinkage of GB2 yarn is high, and it is located on the inner layer of the fabric. The fabric structure is tight, and the utilization rate of fiber shrinkage is low. Therefore, the use of high boiling water shrinkage yarn in the dyeing and finishing process of this kind of fabric is limited by fiber shrinkage.

[0043] Table 1 Knitting conditions of plain pique

[0044]

[0045] (2) One-step oil removal drying

[0046] PBT / PET double composite yarn fabric embryo is passed through the oil removal agent solution tank, and the fabric embryo is pre-shrunk at 70°C by using three compression rollers to prevent the fabric from shrinking unevenly due to severe heat shrinkage. 3 g / L LYS oil removal agent is added to the washing liquid in the first tank, and the knitted fabric is continuously washed in a flat state for 3 times, with a washing time of 1.5 min each time, a washing temperature of 70°C, 70°C and 70°C respectively, a tension ratio of 100 and a speed ratio of 18. After the oil removal treatment, the mock-weave fabric is baked at a temperature of 110°C for 25 s to perform low-temperature tentering drying. The mock-weave fabric is prone to severe shrinkage and deformation after being heated, which causes uneven shrinkage marks, creases and other problems on the fabric surface, which are difficult to eliminate. After the flat oil removal and low-temperature tentering drying, the PBT / PET double composite yarn elastic Poly fabric shrinks severely under heat, the loops shrink uniformly and arrange neatly, which alleviates the heat shrinkage degree of the PBT / PET double composite yarn elastic Poly fabric, thereby avoiding uneven shrinkage of the fabric surface caused by heat during dyeing, which causes creases and other problems.

[0047] (3) Dyeing

[0048] After the oil removal drying, the PBT / PET double composite yarn fabric significantly slows down the heat shrinkage at a temperature below 110°C. The PBT / PET double composite yarn fabric is immersed in a high-temperature and high-pressure overflow dyeing cylinder at 135°C for 30 min in a rope-like relaxed state, so that it can fully shrink in the dyeing cylinder to achieve good fabric elasticity, durability and other effects. The specific dyeing process is shown in Figure 3 .

[0049] (4) Semi-product high-temperature semi-setting

[0050] The PBT / PET double composite yarn elastic Poly fabric fully shrinks in the high-temperature and high-pressure dyeing cylinder, and the fabric surface will have slight wrinkles after dyeing. The semi-product high-temperature semi-setting is returned to the pre-setting, with a temperature of 170°C and an overfeed of 15%. The speed ratio is 20. The elastic Poly fabric is prone to shrinkage and deformation under high-temperature conditions, which causes wrinkles on the fabric that are difficult to eliminate. After pre-setting, the wrinkles can be reduced or eliminated, and the fabric surface is flat and stable in size.

[0051] (5) Dyeing cylinder fastness washing

[0052] After the semi-product high-temperature semi-setting, when the dispersed dye is used to dye medium and dark color series, the dye content is 6%. The PBT / PET double composite yarn Poly fabric will have dispersed dye sublimation and diffusion on the fiber surface under high-temperature conditions, which will cause poor washing fastness. Therefore, the dyeing cylinder fastness washing is returned to improve the washing fastness. When the dispersed dye is used to dye light color series, the dye content is 0.5%.

[0053] (6) Low-temperature finished product setting

[0054] In order to prevent low firmness, the setting standard of setting temperature is 110℃, overfeed is 10%, speed ratio is 18, and 5g / L of softener TM200 is used for the water absorption and dry pulp.

[0055] The specific specification parameters of each process are shown in Table 2.

[0056] Table 2

[0057]

[0058]

[0059] Example 2

[0060] The difference between this example and Example 1 is that the weaving method is different, the weaving conditions are shown in Table 3, and the others are the same as those of Example 1.

[0061] Table 3

[0062]

[0063] Example 3

[0064] The difference between this example and Example 1 is that the weaving method is different, the weaving conditions are shown in Table 4, and the others are the same as those of Example 1.

[0065] Table 4

[0066]

[0067] Comparative Example 1

[0068] The fabric of this comparative example is prepared by the following process: grey fabric→cylinder oil removal→high temperature setting→dyeing→finished product, and the specific process is as follows:

[0069] The PBT / PET double composite yarn Poly fabric is placed in (penetrating agent L1062A) and (oil removing agent Lys) with an initial temperature of 40℃, heated to 90℃ at a rate of 0.5℃ / min, heated to 110℃ at a rate of 1℃ / min, kept for 10min, cooled to 50℃ at a rate of 1℃ / min, washed at 50℃ for 8min, drained, and the dyeing and oil removal process is completed.

[0070] Grey fabric setting: temperature is 180℃, overfeed is 15%, speed ratio is 20, and the specific parameters are shown in Table 5.

[0071] Table 5

[0072]

[0073] Comparative Example 2

[0074] The comparative example differs from Example 1 in that there is no oil removal step (2), and the order of exchange dyeing and setting is changed, i.e., setting before dyeing, and the other steps are the same as in Example 1.

[0075] Comparative Example 3

[0076] The comparative example differs from Example 1 in that there is no oil removal step (2), and the order of exchange dyeing and setting is changed, i.e., setting before dyeing, and the other steps are the same as in Example 1.

[0077] The fabrics prepared in Examples 1-3 and Comparative Examples 1-3 were subjected to performance testing, and the test results are shown in Table 6.

[0078] Specifically, the test methods for each performance are as follows:

[0079] Hand feeling evaluation:

[0080] Warp-knitted fabrics are both stiff and broad like woven fabrics, and are relatively soft and comfortable to wear, so the hand feeling evaluation is based on softness and uses a grading scoring method. The grading scoring is similar to the principle of having experts score and rank in a competition in life, and a selected scale is used to grade the basic properties of the hand feeling of a fabric (such as softness). Three textile industry technicians are selected to touch the fabrics provided in Examples 1-3 and Comparative Examples 1-3, and the hand feeling of the fabric is evaluated comprehensively. The evaluation of hand feeling or style is made by the reaction caused by the touch of the hands of a person to the fabric and the visual impression of the appearance of the fabric. The hand feeling evaluation method of “one pinch, two touches, three grips, and four looks” has formed a set of special terms, such as stiff, crisp, soft and sticky, weak, soft and rotten, fluffy, tight, delicate, coarse, elasticity, liveliness, itching, pricking, stabbing, smooth, slippery, crisp, lively, rough, astringent, dry, and board, etc.

[0081] Fabric elasticity test method:

[0082] Referring to the LTD-03 tension test method (Victoria's Secret customer-specific test), this standard is used to test the elongation of knitted fabrics under a specified tension; the sample size is 9 x 3 inches, and the fabrics provided in Examples 1-3 and Comparative Examples 1-3 are taken in the horizontal and vertical directions. The tension instrument used is a Zwick / Roell H01-LLJ-004 tension machine, a force of 7.5 lb is used, the middle clamping distance is 127 mm, the stretching speed is 20 in / min, and the stretching is cycled twice. The larger the obtained value, the better the elasticity.

[0083] Wear resistance test:

[0084] Test method: refer to GB / T 4802.2-2008 Determination of the pilling behavior of textiles - Part 2: Martindale rubbing test, the fabric provided in Example 1-3 and Comparative Example 1-3 were tested on YG401G Martindale instrument, the sample size was in the form of a circle with a diameter of 140 ± 0.5 mm, under the pressure of 9 ± 0.2 kPa, the circle sample on the clamp was rubbed against the abrasive on the grinding table according to the Li Sha Ju curve. The sample could rotate freely around the central axis perpendicular to the sample plane. After 2500 revolutions of rubbing, the pilling grade of the sample was evaluated by visual description, the grade was from 1-5, 5 was the best, 1 was the worst. Specifically, grade 5 was no change, grade 4 was slight pilling and / or slight pilling on the surface, grade 3 was moderate pilling and / or moderate pilling on the surface, different sizes and densities of balls covered part of the surface of the sample, grade 2 was obvious pilling and / or pilling on the surface, different sizes and densities of balls covered most of the surface of the sample, and grade 1 was severe pilling and / or pilling on the surface, different sizes and densities of balls covered the entire surface of the sample.

[0085] Martindale test:

[0086] Test method: refer to BS-8479 Determination of the linting tendency of textiles - Rotating chamber method, the fabric provided in Example 1-3 and Comparative Example 1-3 were tested on James Heal Snagging Tester instrument, the sample size was 140x140mm, under the speed of 60r / min, forward rotation for 50 revolutions, reverse rotation for 50 revolutions, 10 cycles, a total of 1000 revolutions, then the sample was taken out and compared with the standard rating photo to evaluate the snagging grade, the grade was from 1-5, 5 was the best, 1 was the worst.

[0087] Wrinkle (flatness) evaluation:

[0088] Wrinkle marks are divided into two kinds of active and dead wrinkle marks, dead wrinkle marks refer to permanent wrinkle marks that cannot be eliminated, which cause downgraded fabric and have a certain impact on the flatness of the fabric. According to AATCC 124-2009 Appearance of garments and other textile products after repeated home washing, the textile fabric provided in Example 1-3 and Comparative Example 1-3 was tested according to the above test method, the grade was from 1-5, 5 was the best, 1 was the worst.

[0089] Table 6

[0090]

[0091]

[0092] As shown in Table 6, the woven fabric obtained by the dyeing and finishing process provided by the application has good stiffness, better elasticity, is not easy to hook and has wear resistance, and the fabric flatness is stable, specifically, the obtained fabric has a stiff and broad hand feeling, a longitudinal elongation of 20-26%, a transverse elongation of 50-51%, a wear resistance grade of 4.5, a hooking grade of 4.5, and a flatness grade of 4-4.5, which are superior to the prior art process.

[0093] The application is described by the above embodiments to illustrate the detailed process equipment and process flow of the application, but the application is not limited to the above detailed process equipment and process flow, that is, it does not mean that the application must rely on the above detailed process equipment and process flow to be implemented. It should be understood by those skilled in the art that any improvement of the application, equivalent replacement of each raw material of the product of the application, addition of auxiliary ingredients, selection of specific modes, etc. fall within the protection scope and disclosure scope of the application.

[0094] The preferred embodiments of the application are described in detail above, but the application is not limited to the specific details in the above embodiments, and within the technical concept scope of the application, the technical solutions of the application can be variously and simply modified, and these simple modifications all belong to the protection scope of the application.

[0095] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined by any suitable method without contradiction, and in order to avoid unnecessary repetition, the application will not further describe various possible combination methods.

[0096] In addition, various different embodiments of the application can also be combined arbitrarily, as long as it does not deviate from the idea of the application, and it should be considered as the disclosed content of the application.

Claims

1. A dyeing and finishing process for imitation woven fabrics, characterized in that: The method comprises the following steps: removing oil from the fabric grey cloth by a one-step method, drying the cloth, directly dyeing the cloth after removing oil by the one-step method, and shaping the finished product; The fabric grey cloth is a PBT / PET double composite yarn fabric; The specific process of the one-step degreasing and drying method is as follows: the fabric grey cloth is degreased and pre-shrunk at 60-80°C using a degreasing agent, washed with water, and then baked at 105-115°C for low-temperature tenter drying for 20-30s; The fabric grey cloth is woven by using a warp pile plain weave; The dyeing process comprises the following steps: soaking the PBT / PET double composite yarn fabric in a rope-like relaxed state after degreasing in one step in an overflow dyeing vat at a high temperature of 130-135° C. and a high pressure of 2.5-3.0 Bar for dyeing for 20-40 minutes.

2. The dyeing and finishing process according to claim 1, characterized in that: In the PBT / PET double composite yarn fabric, the mass ratio of PBT to PET is (20-30):(70-80).

3. The dyeing and finishing process according to claim 1, characterized in that: The water washing is performed three times, and the water washing conditions are: the time of each water washing is 1-2 minutes, the water washing temperature is 68-72° C., the tension ratio is 98-101, and the speed ratio is 15-20.

4. The dyeing and finishing process according to claim 1, characterized in that: The degreasing agent is LYS degreasing agent.

5. The dyeing and finishing process according to claim 1, characterized in that: The usage of the degreasing agent is 1-5 g / L.

6. The dyeing and finishing process according to claim 1, characterized in that: The mass of the dye in the dye vat accounts for 0.1-10% of the mass of the PBT / PET double composite yarn fabric.

7. The dyeing and finishing process according to claim 6, characterized in that: The dye is selected from any one or a combination of at least two of Disperse Yellow S-2R, Disperse Red LSF and Disperse Navy SG.

8. The dyeing and finishing process according to claim 1, characterized in that: During the dyeing, the bath ratio is 1:6-1:

15.

9. The dyeing and finishing process according to claim 8, characterized in that: During the dyeing, the bath ratio is 1:

12.

10. The dyeing and finishing process according to claim 1, characterized in that: When dyeing light colors, the dyeing and finishing process includes the steps of degreasing and drying the fabric grey cloth in a one-step process, directly dyeing the fabric after the one-step degreasing and drying process, and high-temperature finalizing the finished product.

11. The dyeing and finishing process according to claim 10, characterized in that: The temperature for setting the high-temperature finished product is 160-180°C.

12. The dyeing and finishing process according to claim 1, characterized in that: The dyeing and finishing process for dyeing a dark color includes the steps of degreasing and drying the fabric grey cloth in one step, directly dyeing the fabric after degreasing and drying the fabric in one step, semi-finishing the semi-finished product at high temperature, washing the dye vat for fastness, and shaping the finished product at low temperature.

13. The dyeing and finishing process according to claim 12, characterized in that: The specific process of the semi-finished product high temperature semi-setting is: pre-setting the dyed PBT / PET double composite yarn fabric under high temperature conditions of 160-180°C, with a speed ratio of 15-20 and an overfeed ratio of 10-20%.

14. The dyeing and finishing process according to claim 12, characterized in that: The conditions for low-temperature finished product shaping are: temperature of 100-120° C., speed ratio of 15-20, and overfeed ratio of 5-15%.

15. The dyeing and finishing process according to claim 12, characterized in that: A softener is also added when the low-temperature finished product is shaped.

16. The dyeing and finishing process according to claim 15, characterized in that: The softener is any one of soft oil S150, soft oil P, and TM200, or a mixture of at least two of them.

17. The dyeing and finishing process according to claim 15, characterized in that: The mass concentration of the softener is 3-8 g / L.

18. An imitation woven fabric obtained by the dyeing and finishing process according to any one of claims 1 to 17.

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