Production method and device for improving non-ironing durability of fabric

Abstract

The invention belongs to the technical field of textile dyeing and finishing processing, and particularly relates to a production method and device for improving the non-ironing durability of a fabric. The method comprises the following specific steps: preparing a semi-finished fabric; applying a non-ironing auxiliary agent, namely applying the non-ironing auxiliary agent to the semi-finished fabric on a stentering machine through a padding groove provided with an ultrasonic generating device; resin cross-linking reaction: matching different resin cross-linking reaction processes according to different selected non-ironing resins: baking dry cross-linking resin at 140-160 DEG C for 2-5 minutes; stacking the moist crosslinking resin at 38-40 DEG C for 12-24 hours; carrying out non-ironing post-treatment on the fabric, namely washing the fabric after the cross-linking reaction, and carrying out post-treatment. According to the invention, the cavitation effect of ultrasonic waves is utilized to ensure that more resin stays in a fiber amorphous area. The problem of non-ironing durability of the processed and washed fabric resin is solved, and the final durable non-ironing performance of the fabric is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of textile dyeing and finishing, and specifically relates to a production method and a device for improving the durability of non-ironing fabrics. Background Art

[0002] Natural fiber fabrics and regenerated cellulose fiber fabrics are popular among consumers due to their good air permeability, strong moisture absorption and comfort. However, such clothing fabrics are prone to wrinkling during wearing and washing, which affects the aesthetic effect.

[0003] Cotton fiber and regenerated cellulose fiber contain crystalline and amorphous regions. When the fiber is subjected to external force, the cellulose molecular chains or basic structural units in the amorphous region are relatively displaced, the original hydrogen bonds are broken, and new hydrogen bonds are formed at new positions. After the external force is eliminated, the original deformation of the system cannot be completely restored, and the new deformation is retained, causing the fiber to bend and deform, and then forming surface wrinkles of the fabric, affecting the appearance of the clothing. At present, the means to solve the above problems is to dip and spray resin on the fabric or clothing to form permanent cross-links between the fibers or the resin is deposited in the amorphous region to improve the wrinkle recovery and resilience of the fabric. However, if the resin cross-linking reaction is not sufficient, the washability of the fabric and clothing will be poor, and the flatness of the fabric will deteriorate after washing 10-20 times. Therefore, there is an urgent need to improve the durability of the fabric.

[0004] Chinese patent CN103696255A discloses a method for achieving wrinkle-free finishing of pure cotton fabrics by using electron beam radiation to quickly cure crosslinking agents. The patent describes a new reaction system from the configuration of anti-wrinkle finishing agents, to the application of auxiliaries, and then to low-energy electron beam radiation curing and crosslinking. This method is completely different from the current 2D resin reaction system and requires a perfect combination of anti-wrinkle finishing agents and radiation curing. It requires research on the entire system from reaction principles to the realization of effects, and its feasibility needs further practical verification.

[0005] Chinese patent CN106120328A discloses a method for preparing wrinkle-free textiles. The patent describes the application of wrinkle-free resin to one side of the fabric by high-frequency ultrasonic atomization to achieve the wrinkle-resistant effect on one side of the fabric. The method only uses the atomization effect of ultrasound to form atomized microbeads of the wrinkle-free additive to achieve the purpose of applying the additive on one side. Summary of the invention

[0006] The purpose of the present invention is to solve the above problems, and to use the cavitation effect of ultrasonic waves to ensure that the resin stays more in the amorphous area of ​​the fiber. The problem of the durability of the 2D resin and its modified or etherified resin, and the glyoxal resin reaction system on natural fiber fabrics, regenerated cellulose fiber fabrics, and natural fiber and regenerated cellulose fiber blended fabrics after washing is solved, so as to achieve the ultimate durable non-ironing property of the fabric.

[0007] The production method for improving the durability of the non-ironing fabric of the present invention comprises the following steps:

[0008] S1 Preparation of semi-finished fabrics: The semi-finished fabrics are woven or knitted fabrics that have been dyed and mercerized or treated with liquid ammonia and are ready for post-finishing. The fabric material is natural fiber fabrics, regenerated cellulose fiber fabrics, or fabrics containing natural fibers or regenerated cellulose fibers;

[0009] S2 Application of non-ironing additives: The semi-finished fabrics are applied with non-ironing additives on a tentering machine through a padding tank equipped with an ultrasonic generator; the formula of the non-ironing additives includes resin, catalyst, fiber protective agent, and softener; the non-ironing resin type is one of modified 2D resin, etherified 2D resin or glyoxal resin;

[0010] S3 resin cross-linking reaction: According to the different non-ironing resins, different resin cross-linking reaction processes are matched: dry cross-linking resins are baked at 140-160℃ for 2-5min; wet cross-linking resins are stacked at 38-40℃ for 12-24h;

[0011] S4 fabric non-ironing post-treatment: the fabric is washed after the cross-linking reaction, and finally the feel and dimensional stability are improved.

[0012] The pH value of the semi-finished fabric surface is 5-7.

[0013] The ultrasonic wave emitted by the ultrasonic generating device is perpendicular to the running direction of the fabric; the frequency of the ultrasonic wave emitted by the ultrasonic generating device is 8-20kHz.

[0014] The ultrasonic wave emitted by the ultrasonic wave generating device acts on the fabric for 1.0-5.0s.

[0015] The wrinkle-free agent is applied by two dipping and two rolling methods, and the liquid content of the fabric after dipping and rolling is 40%-70%; the moisture content of the fabric after the wrinkle-free agent is applied and stretched and dried is 5.0-6.5%.

[0016] The resin is preferably CR-E or CR-MC; the catalyst is preferably CT-C or LRMC; the fiber protective agent is preferably SF-P; and the softener is preferably SHE-02.

[0017] The resin dosage in the non-ironing auxiliary agent working solution is 50-220 g / L, the catalyst dosage is 10-110 g / L, the fiber protection agent dosage is 10-30 g / L, and the softener dosage is 10-60 g / L.

[0018] In the resin cross-linking reaction, the mass ratio of the dry cross-linking resin to the catalyst is 3:1, and the mass ratio of the wet cross-linking resin to the catalyst is 2:1.

[0019] The wrinkle-free post-treatment process also includes one or a combination of several processes including stretching softening, enzyme washing, super softening, sanding, brushing, calendering, and pre-shrinking.

[0020] The production device for improving the durability of the wrinkle-free fabric is characterized by comprising a immersion and rolling tank shell, an ultrasonic generating device is arranged inside the immersion and rolling tank shell, a guide roller is arranged at the bottom of the inner part of the immersion and rolling tank shell, a first cloth guide roller and a second cloth guide roller are arranged on both sides of the opening of the immersion and rolling tank shell, the first cloth guide roller is located at the front side of the fabric, the second cloth guide roller is located at the rear side of the fabric, and a rolling roller is arranged outside the second cloth guide roller at the rear side of the fabric.

[0021] When in use, the fabric passes through the first fabric guide roller, the guide roller, the second fabric guide roller, and the roller in sequence.

[0022] The production padding tank used in the invention for improving the durability of the non-ironing fabric is provided with an ultrasonic generating device.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present invention utilizes ultrasonic vibration to expel the air trapped in the intersection of fabrics or inside the yarn into the solution and remove it through acoustic cavitation and jet action, thereby increasing the contact area between the non-ironing finishing liquid and the fabric; and the ultrasonic wave strengthens the activity of the amorphous zone chain segments inside the fiber, accelerates the diffusion speed of the resin inside the fiber, and ensures that more resin stays in the amorphous zone of the fiber.

[0025] By adding ultrasound during the resin impregnation process to ensure that more resin enters the amorphous area of ​​the fiber, the final durable ironing-free property of the fabric can be achieved by controlling the liquid carrying rate of the fabric, the moisture content of the fabric after drying, the ratio of additives such as resin catalysts, and the temperature and time of baking and stacking reactions.

[0026] The problem of the durability of natural fiber fabrics, regenerated cellulose fiber fabrics and natural fiber and regenerated cellulose fiber blended fabrics after washing by 2D resin and its modified or etherified resin, glyoxal resin reaction system fabrics is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic structural diagram of the impregnation tank with an ultrasonic generating device according to the present invention.

[0028] In the figure, 1-1, first cloth guide roller; 1-2, second cloth guide roller; 2, immersion and rolling tank shell; 3, guide roller; 4, ultrasonic generating device; 5, rolling roller; 6, fabric. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with the embodiments.

[0030] All raw materials used in the examples are commercially available unless otherwise specified, including:

[0031] The resin is CR-E or CR-MC, a commercial product of Zibo Lurui Fine Chemical Co., Ltd.;

[0032] The catalyst is CT-C or LRMC, a commercial product of Zibo Lurui Fine Chemical Co., Ltd.;

[0033] The fiber protection agent is SF-P, a commercial product of Zibo Lurui Fine Chemical Co., Ltd.;

[0034] The softener is SHE-02, a commercial product of Zibo Lurui Fine Chemical Co., Ltd.

[0035] Example 1

[0036] The production method for improving the durability of the non-ironing fabric described in this embodiment has the following specific implementation steps:

[0037] Preparation of semi-finished fabrics: The pure cotton woven plain fabric with warp and weft yarn counts of 40, warp yarn density of 130 yarns / inch and weft yarn density of 70 yarns / inch is processed by desizing, mercerizing and liquid ammonia finishing to obtain a pure cotton woven plain fabric with a pH value of 6.0.

[0038] Prepare a non-ironing auxiliary agent working solution containing 150g / L resin CR-E, 50g / L catalyst CT-C, 15g / L fiber protector SF-P, and 20g / L softener SHE-02, pour the working solution into the dipping tank 2 equipped with an ultrasonic generator 4, and control the frequency of the ultrasonic generator at 20kHz.

[0039] The semi-finished fabric is run perpendicular to the direction of the ultrasonic wave from front to back to be impregnated with the non-ironing working liquid, and after exiting the impregnation tank, it is squeezed by roller 5, and the above impregnation and squeezing are repeated twice. The running speed of the fabric is controlled to ensure that the ultrasonic wave acts on the fabric for 3.0 seconds, and the pressure of the roller is controlled to ensure that the liquid carrying rate of the fabric after passing through the roller is 60%. The fabric after the above two impregnations and two rollings is dried through a tentering machine, and the moisture content of the fabric after drying is controlled to be 5.5%. The fabric is then baked in a baking machine at a temperature of 155°C for 3 minutes. After baking, it is washed, stretched to soften, and pre-shrunk in sequence to obtain a non-ironing and durable finished fabric.

[0040] Among them, the production impregnation tank for improving the durability of the fabric without ironing includes an impregnation tank shell 2, an ultrasonic generating device 4 is arranged in the impregnation tank shell 2, a guide roller 3 is arranged at the bottom of the impregnation tank shell 2, and a first cloth guide roller 1-1 and a second cloth guide roller 1-2 are arranged on both sides of the opening of the impregnation tank shell 2. The first cloth guide roller 1-1 is located at the front side of the fabric, and the second cloth guide roller 1-2 is located at the rear side of the fabric. A rolling roller 5 is arranged outside the second cloth guide roller 1-2 at the rear side of the fabric.

[0041] When in use, the fabric 6 passes through the first fabric guide roller 1 - 1, the guide roller 3, the second fabric guide roller 1 - 2, and the roller 5 in sequence.

[0042] Comparative Example 1

[0043] The fabric types are consistent with those in Example 1.

[0044] A non-ironing auxiliary agent working solution containing 150 g / L resin CR-E, 50 g / L catalyst CT-C, 15 g / L fiber protection agent SF-P, and 20 g / L softener SHE-02 was prepared and loaded into a commercially available conventional padding tank.

[0045] The fabric, which has been processed by desizing, mercerizing, and liquid ammonia finishing and has a surface pH value of 6.0, is subjected to a padding treatment of two dips and two pads in the above-mentioned padding tank filled with the non-ironing working liquid, and the liquid carrying rate of the fabric after padding is controlled to be 60%. The fabric after the above two dips and two pads is dried by a tentering machine, and then the fabric is baked in a baking machine at a temperature of 155°C for 3 minutes. After baking, it is washed, softened by tentering, and pre-shrunk to obtain a comparative fabric.

[0046] Example 2

[0047] The production method for improving the durability of the non-ironing fabric described in this embodiment has the following specific implementation steps:

[0048] Preparation of semi-finished fabrics: A pure cotton woven 2 / 1 twill fabric with warp and weft yarn counts of 80 / 2, a warp density of 140 yarns / inch, and a weft density of 90 yarns / inch is used. The fabric is processed by desizing, mercerizing, and liquid ammonia finishing to obtain a twill fabric with a pH value of 5.0 on the surface.

[0049] Prepare a moisture cross-linking working solution containing 220g / L resin CR-MC, 110g / L catalyst LRMC, 20g / L fiber protection agent SF-P, and 30g / L softener SHE-02, pour the working solution into a padding tank equipped with an ultrasonic generator, and control the frequency of the ultrasonic generator at 18kHz.

[0050] The twill fabric is run perpendicular to the direction of the ultrasonic wave from front to back to be impregnated with the non-ironing working liquid, and after exiting the impregnation tank, it is squeezed by a roller, and the above impregnation and squeezing are repeated twice. The running speed of the fabric is controlled to ensure that the ultrasonic wave acts on the fabric for 5.0s, and the pressure of the roller is controlled to ensure that the liquid carrying rate of the fabric after passing through the roller is 50%. The fabric after the above two impregnations and two rollings is dried through a tentering machine, and the moisture content of the fabric after drying is controlled to be 6.5%. The fabric is then placed in a constant temperature room at 38°C for storage for 24 hours. After storage, it is washed, super-softened, stretched and softened, and pre-shrunk to obtain a non-ironing and durable finished fabric.

[0051] Among them, the production impregnation tank for improving the durability of the fabric without ironing includes an impregnation tank shell 2, an ultrasonic generating device 4 is arranged in the impregnation tank shell 2, a guide roller 3 is arranged at the bottom of the impregnation tank shell 2, and a first cloth guide roller 1-1 and a second cloth guide roller 1-2 are arranged on both sides of the opening of the impregnation tank shell 2. The first cloth guide roller 1-1 is located at the front side of the fabric, and the second cloth guide roller 1-2 is located at the rear side of the fabric. A rolling roller 5 is arranged outside the second cloth guide roller 1-2 at the rear side of the fabric.

[0052] When in use, the fabric 6 passes through the first fabric guide roller 1 - 1, the guide roller 3, the second fabric guide roller 1 - 2, and the roller 5 in sequence.

[0053] Comparative Example 2

[0054] The fabric types are consistent with those in Example 2.

[0055] A moisture cross-linking working solution containing 220 g / L resin CR-MC, 110 g / L catalyst LRMC, 20 g / L fiber protection agent SF-P, and 30 g / L softener SHE-02 was prepared and loaded into a commercially available conventional padding tank.

[0056] The fabric processed by desizing, mercerizing, and liquid ammonia finishing and having a fabric surface pH value of 5.0 is subjected to a padding treatment of two dips and two pads in the above-mentioned padding tank filled with a moisture crosslinking working solution, and the liquid carrying rate of the fabric after padding is controlled to be 50%. The fabric after the above two dips and two pads is dried by a tentering machine, and then the fabric is placed in a constant temperature room at 38°C for 24 hours. After storage, it is washed, super-softened, tentered and softened, and pre-shrunk to obtain a comparative fabric.

[0057] Example 3

[0058] The production method for improving the durability of non-ironing fabrics described in this embodiment has the following specific implementation steps:

[0059] Preparation of semi-finished fabrics: 2 / 2CP weave fabric with warp yarn count of 40 pure cotton yarn and weft yarn count of 70 / 30 cotton / lyocell blended 60 / 2, warp yarn density of 120 yarns / inch and weft yarn density of 90 yarns / inch. The fabric is processed by desizing and liquid ammonia finishing to obtain a weave fabric with a pH value of 7.0 on the surface.

[0060] Prepare a non-ironing auxiliary agent working solution containing 120g / L resin CR-E, 40g / L catalyst CT-C, 10g / L fiber protector SF-P, and 10g / L softener SHE-02, pour the working solution into a padding tank equipped with an ultrasonic generator, and control the frequency of the ultrasonic generator at 8kHz.

[0061] The fabric is run perpendicular to the direction of the ultrasonic wave from front to back to be impregnated with the non-ironing working liquid, and after exiting the impregnation tank, it is squeezed by a roller, and the above impregnation and squeezing are repeated twice. The running speed of the fabric is controlled to ensure that the ultrasonic wave acts on the fabric for 1.0s, and the pressure of the roller is controlled to ensure that the liquid carrying rate of the fabric after passing through the roller is 40%. The fabric after the above two impregnations and two rollings is dried through a tentering machine, and the moisture content of the fabric after drying is controlled to be 5.0%. The fabric is then baked in a baking machine at a temperature of 150°C for 3 minutes. After baking, it is washed, brushed, stretched to soften, and pre-shrunk in sequence to obtain a non-ironing and durable finished fabric.

[0062] Among them, the production impregnation tank for improving the durability of the fabric without ironing includes an impregnation tank shell 2, an ultrasonic generating device 4 is arranged in the impregnation tank shell 2, a guide roller 3 is arranged at the bottom of the impregnation tank shell 2, and a first cloth guide roller 1-1 and a second cloth guide roller 1-2 are arranged on both sides of the opening of the impregnation tank shell 2. The first cloth guide roller 1-1 is located at the front side of the fabric, and the second cloth guide roller 1-2 is located at the rear side of the fabric. A rolling roller 5 is arranged outside the second cloth guide roller 1-2 at the rear side of the fabric.

[0063] When in use, the fabric 6 passes through the first fabric guide roller 1 - 1, the guide roller 3, the second fabric guide roller 1 - 2, and the roller 5 in sequence.

[0064] Comparative Example 3

[0065] The fabric types are consistent with those in Example 3.

[0066] A non-ironing auxiliary agent working solution containing 120 g / L resin CR-E, 40 g / L catalyst CT-C, 10 g / L fiber protection agent SF-P, and 10 g / L softener SHE-02 was prepared and loaded into a commercially available conventional padding tank.

[0067] The fabric which has been desized and finished with liquid ammonia and has a surface pH value of 7.0 is subjected to a padding treatment of two dips and two pads in the padding tank containing the non-ironing working liquid, and the liquid carrying rate of the fabric after padding is controlled to be 40%. The fabric after the above two dips and two pads is dried by a tentering machine, and then the fabric is baked in a baking machine at a temperature of 150°C for 3 minutes. After baking, it is washed, brushed, stretched to soften, and pre-shrunk to obtain a comparative fabric.

[0068] The finished fabrics processed in the above-mentioned Examples 1-3 and Comparative Examples 1-3 were tested for their non-ironing properties after different washing times. The test results are shown in Table 1.

[0069]

[0070] It can be seen from the test results of the finished fabric that the present invention achieves the ultimate durable non-ironing property of the fabric, and solves the problem of non-ironing durability of the fabric made of 2D resin and its modified or etherified resin, and glyoxal resin reaction system after washing on natural fiber fabrics, regenerated cellulose fiber fabrics, and natural fiber and regenerated cellulose fiber blended fabrics.

Claims

1. A production method for improving the durability of non-ironing fabrics, characterized in that: The following steps are involved: S1 Preparation of semi-finished fabrics: The semi-finished fabrics are woven or knitted fabrics that have been dyed and mercerized or treated with liquid ammonia and are ready for post-finishing. The fabric material is natural fiber fabrics, regenerated cellulose fiber fabrics, or fabrics containing natural fibers or regenerated cellulose fibers; S2 Application of non-ironing additives: The semi-finished fabrics are applied with non-ironing additives on a tentering machine through a padding tank equipped with an ultrasonic generator; the formula of the non-ironing additives includes resin, catalyst, fiber protective agent, and softener; the non-ironing resin type is one of modified 2D resin, etherified 2D resin or glyoxal resin; S3 resin cross-linking reaction: According to the different non-ironing resins, different resin cross-linking reaction processes are matched: dry cross-linking resins are baked at 140-160℃ for 2-5min; wet cross-linking resins are stacked at 38-40℃ for 12-24h; S4 fabric non-ironing post-treatment: the fabric is washed after the cross-linking reaction, and finally the feel and dimensional stability are improved.

2. The production method for improving the durability of non-ironing fabrics according to claim 1, characterized in that: The pH value of the semi-finished fabric surface is 5-7.

3. The production method for improving the durability of non-ironing fabrics according to claim 1, characterized in that: The ultrasonic wave emitted by the ultrasonic generating device is perpendicular to the running direction of the fabric; and the frequency of the ultrasonic wave emitted by the ultrasonic generating device is 8-20kHz.

4. The production method for improving the durability of non-ironing fabrics according to claim 1, characterized in that: The ultrasonic wave emitted by the ultrasonic wave generating device acts on the fabric for a time period of 1.0-5.0s.

5. The production method for improving the durability of non-ironing fabrics according to claim 1, characterized in that: The wrinkle-free agent is applied by two dipping and two rolling methods, and the liquid content of the fabric after dipping and rolling is 40%-70%; the moisture content of the fabric after the wrinkle-free agent is applied and stretched and dried is 5.0-6.5%.

6. The production method for improving the durability of non-ironing fabrics according to claim 1, characterized in that: The resin dosage in the non-ironing auxiliary agent working solution is 50-220 g / L, the catalyst dosage is 10-110 g / L, the fiber protection agent dosage is 10-30 g / L, and the softener dosage is 10-60 g / L.

7. The production method for improving the durability of non-ironing fabrics according to claim 1, characterized in that: In the resin cross-linking reaction, the mass ratio of the dry cross-linking resin to the catalyst is 3:1, and the mass ratio of the wet cross-linking resin to the catalyst is 2:

1.

8. The production method for improving the durability of non-ironing fabrics according to claim 1, characterized in that: The wrinkle-free post-treatment process also includes one or a combination of several processes including stretching softening, enzyme washing, super softening, sanding, brushing, calendering, and pre-shrinking.

9. A production device for improving the durability of non-ironing fabrics according to claim 1, characterized in that: The invention comprises a padding tank shell (2), an ultrasonic generating device (4) is arranged in the padding tank shell (2), a guide roller (3) is arranged at the bottom of the padding tank shell (2), a first cloth guide roller (1-1) and a second cloth guide roller (1-2) are arranged on both sides of the opening of the padding tank shell (2), the first cloth guide roller (1-1) is located at the front side of the fabric, the second cloth guide roller (1-2) is located at the rear side of the fabric, and a roller (5) is arranged outside the second cloth guide roller (1-2) at the rear side of the fabric.

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