Dyeing process of tencel / wool / nylon / spandex blended fabric

Abstract

The invention relates to the technical field of textile printing and dyeing, and particularly provides a dyeing process of a tencel / wool / nylon / spandex blended fabric. According to the method, the technological process is controlled, the synergistic effect of various auxiliaries and the resist agent is matched, the blended fabric is dyed through a one-bath one-step method, the blended fabric is dyed under the neutral or alkalescent condition, damage to wool fibers is effectively reduced, the color separation problem of tencel and wool is avoided, and the color separation effect of the tencel and the wool is improved. Meanwhile, the dyeing time is remarkably shortened, the surface smoothness of the fabric is improved, energy conservation and emission reduction are realized, and the color fastness requirement is met.

Description

Technical Field

[0001] The invention relates to the technical field of textile printing and dyeing, in particular to a dyeing process for a Tencel / wool / nylon / spandex blended fabric. Background Art

[0002] Tencel / wool / nylon blended fabrics can present various problems during the dyeing process. Wool, a protein fiber, typically requires dyeing under weak acid conditions, while Tencel fibers are typically dyed under alkaline conditions, which damages the wool fibers. For example, Chinese patent document CN 108396570 A (application number 201810159791.0) discloses a one-bath, two-step process for dyeing Tencel / wool / nylon fabrics. This process involves first dyeing the Tencel with an alkaline dye, then dyeing the wool and nylon fibers with an acidic dye. This method can damage the wool fibers.

[0003] When using two-bath dyeing, reactive dyes are used to dye Tencel, followed by acid dyes for wool and nylon. However, in actual production, this only achieves a non-staining Tencel and nylon color separation. Specifically, when dyeing Tencel, wool is dyed simultaneously, resulting in severe color separation between the Tencel and wool, making homochromy difficult to control. Furthermore, due to the long dyeing time of two-bath dyeing, Tencel fibers swell in the high-temperature, weakly acidic dyeing conditions when dyeing wool and nylon. Friction between the dye vat and the fabric causes fibrillation over time, leading to pilling. Furthermore, the two-bath dyeing process takes a long time, results in significant wool loss, and consumes significant energy. Especially when dyeing dark colors, dyes can stain each other, making it difficult to meet fastness requirements.

[0004] Therefore, a new dyeing process is urgently needed to solve the above problems existing in the dyeing process of Tencel / wool / nylon / spandex blended fabrics. Summary of the Invention

[0005] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a dyeing process for Tencel / wool / nylon / spandex blended fabrics. The blended fabric is dyed by a one-bath one-step method, which not only effectively reduces the damage to the wool fiber, but also avoids the color separation problem of Tencel and wool. At the same time, it significantly shortens the dyeing time, improves the surface smoothness of the fabric, achieves energy conservation and emission reduction, and meets the color fastness requirements.

[0006] In order to achieve the above technical effects, the present invention adopts the following technical solutions: A dyeing process for a Tencel / wool / nylon / spandex blended fabric comprises the following steps: S1, refining the blended fabric; S2. Add water to the blended fabric treated in step S1, raise the temperature to 40-45°C, and then sequentially add 1-1.5 g / L of Farmanfeng SP, 3-6 g / L of resist N-BSN, 20-80 g / L of sodium sulfate, the first dye, and the second dye. Then, raise the temperature to 90-100°C at a rate of 0.5-1.5°C / min and maintain for 30-60 min. Then, cool the temperature to 60-70°C at a rate of 1-1.5°C / min, drain the liquid, perform post-processing, and discharge the fabric.

[0007] In step S2, the pH range of the liquid environment in which the blended fabric is located is 7-7.5.

[0008] Preferably, in step S1, the refining treatment is oxygen bleaching treatment or oil removal treatment.

[0009] When the desired dyeing is light or medium color, oxygen bleaching is selected as the refining treatment; when the desired dyeing is dark color, degreasing is selected as the refining treatment; Among them, black is a darker color.

[0010] Light color refers to dye dosage less than 0.5% owf, medium color refers to dye dosage of 0.5t%-1.5% owf, and dark color refers to dye dosage greater than 1.5% owf.

[0011] Further preferably, the oxygen bleaching treatment steps are as follows: Add clean water to the blended fabric at a bath ratio of 1:10, raise the temperature to 40°C, add 0.75wt% chromatophore AP-B and keep warm for 10 minutes, add 2.5wt% chromatophore AP-A and keep warm for 10 minutes, add 2wt% hydrogen peroxide and keep warm for 10 minutes, raise the temperature to 80°C at a rate of 3°C / min, keep warm for 45 minutes, cool to 70°C at a rate of 1°C / min, drain, wash twice with 60°C hot water, each time for 10 minutes, wash with 1g / L glacial acetic acid for 10 minutes, add 0.06g / L deoxidizer within 10 minutes, and circulate for 15 minutes without draining.

[0012] More preferably, the deoxidizer is deoxygenase DQ-8682, which is a product of fermentation of genetically modified mold and can completely decompose residual hydrogen peroxide into water and oxygen.

[0013] Further preferably, the oil removal treatment steps are as follows: Add clean water to the blended fabric at a bath ratio of 1:10, add 1g / L of penetrant GS-10 and keep warm for 5 minutes, add 1g / L of soda ash and keep warm for 5 minutes, add 1g / L of degreaser LDA and keep warm for 5 minutes, heat to 90℃ and keep warm for 45 minutes, cool to 70℃ at a rate of 1℃ / min and drain, put into water for hot washing at 80℃ and keep warm for 10 minutes, cool to 70℃ at a rate of 1℃ / min and drain, add water for hot washing at 60℃ and keep warm for 10 minutes and drain, add washing water and keep warm for 10 minutes and drain.

[0014] In step S2, the mass ratio of the blended fabric to water is 1:(10-15).

[0015] Preferably, in step S2, after adding Farmanfeng SP and circulating for 5 minutes, N-BSN is added, after adding the dye-resist N-BSN and circulating for 5 minutes, sodium sulfate is added, sodium sulfate is added within 20 minutes, and the first dye is added after circulating for 10 minutes. The first dye is evenly added within 30 minutes and circulated for 5 minutes, and then the second dye is added, and the second dye is evenly added within 30 minutes and circulated for 5 minutes before heating treatment.

[0016] In step S2, the post-treatment method is one or more of water washing, hot washing, soap washing, and color fixing.

[0017] Preferably, in step S2, the first dye is selected from the Agasset NHK series dyes and / or the Agasset M series dyes, and the second dye is selected from the Agasset NF series dyes and / or the Agasset EN series dyes. The Agasset NHK series dyes and the Agasset NF series dyes do not require a fixation step during the dyeing process; the Agasset M series dyes and the Agasset EN series dyes are used for black dyeing, and soda ash is used for fixation during the dyeing process according to actual conditions. However, the required soda ash dosage is low, not exceeding 5%, and will not damage wool and nylon. By using the first and second dyes in combination with N-BSN, one-bath dyeing of the blended fabric is achieved under neutral or weakly alkaline conditions.

[0018] Compared with the prior art, the present invention has the following beneficial effects: 1. In the dyeing process provided by the invention, by controlling the process flow and coordinating the synergistic effects of various auxiliaries and anti-dyeing agents, it is possible to dye blended fabrics under neutral or weakly alkaline conditions, effectively solving the color separation problem, and at the same time, the blended fabrics obtained have good color fastness.

[0019] 2. The dyeing process provided by the present invention avoids wool loss caused by the long-term operation of the grey cloth in the dyeing machine by using the one-bath dyeing method, and avoids the hairiness of the grey cloth in the dyeing machine. Compared with the traditional two-bath dyeing process, the dyeing time is reduced by 35%, the energy consumption is reduced by 40%, and the comprehensive cost is reduced by 35%; compared with other one-bath methods, the dyeing order of Tencel and nylon wool is changed, the amount of acid and alkali used is reduced, the fastness is improved, and energy saving and emission reduction are achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a process curve diagram of the refining treatment in Example 1; Figure 2 It is the process curve diagram of dyeing and post-treatment in Example 1; Figure 3 It is the process curve diagram of dyeing and post-treatment in Example 2; Figure 4 is a process curve diagram of the refining treatment in Example 3; Figure 5 It is the process curve diagram of dyeing and post-treatment in Example 3; Figure 6 It is the process curve diagram of dyeing and post-treatment in Example 4; Figure 7 It is the process curve diagram of dyeing of comparative example 1; Figure 8 It is the process curve diagram of dyeing of comparative example 2; Figure 9 This is a real picture of the color separation of Example 1; Figure 10 This is a real picture of the color separation of comparative example 1; Figure 11 This is a real picture of the color separation of Example 4; Figure 12 This is a real picture of the color separation of comparative example 2. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings and examples.

[0022] The raw materials and experimental equipment used in each embodiment and comparative example are all commercially available raw materials and experimental equipment in this field, such as degreasing agent LDA purchased from Shanghai Yuanna Fine Chemical Co., Ltd., anti-dyeing agent N-BSN purchased from DyStar (Shanghai) Management Co., Ltd., chromatophore AP-A and chromatophore AP-B purchased from Shanghai Yuanna Fine Chemical Co., Ltd., penetrant GS-10 purchased from Daily Chemical Chemical (China) Co., Ltd., Farmanfeng SP, Agarset NHK series and Agarset M series dyes, Agarsu NF series and Agarsu EN series dyes are all purchased from Shanghai Yayun Textile Chemical Co., Ltd., fixing agent DM2518 purchased from Shijiazhuang Demei Chemical Co., Ltd., deoxygenase DQ-8682 purchased from Guangdong Demei Fine Chemical Co., Ltd., and foaming soap detergent purchased from Qinghe County Rouyun Trading Co., Ltd. The specific sources of other raw materials and experimental equipment are not repeated here.

[0023] Example 1 A dyeing process for a Tencel / wool / nylon / spandex blended fabric, wherein the blended fabric comprises 54% Tencel, 13% wool, 30% nylon and 3% spandex, and the desired dyeing is a light color, specifically gray.

[0024] The dyeing process specifically includes the following steps: Pre-treatment: The blended fabric was scouring treated, and the Tencel wool nylon spandex blended fabric was put into the dye vat of the overflow dyeing machine with a bath ratio of 1:10. The temperature was raised to 40°C, 0.75wt% of chromatophore AP-B was added and kept warm for 10 minutes, 2.5wt% of chromatophore AP-A was added and kept warm for 10 minutes, 2wt% of hydrogen peroxide was added and kept warm for 10 minutes, the temperature was raised to 80°C (3°C / min), kept warm for 45 minutes, cooled to 70°C (1°C / min), drained, washed twice with 60°C hot water, each time for 10 minutes, washed with 1g / L glacial acetic acid for 10 minutes, 0.06g / L deoxidizer (deoxidase DQ-8682) was added within 10 minutes, and circulated for 15 minutes without draining.

[0025] dyeing: The pre-treated blended fabric was directly heated to 40°C in the dye vat, 1g / L of Farmanfeng SP was added and circulated for 5 minutes, 5g / L of resist N-BSN was added and circulated for 5 minutes, 30g / L of sodium sulfate was evenly added within 20 minutes, circulated for 10 minutes, the first dye was evenly added within 30 minutes and circulated for 5 minutes, the second dye was evenly added within 30 minutes, and the temperature was raised to 100°C at a rate of 1°C / min and kept warm for 30 minutes, and then the temperature was lowered to 70°C at a rate of 1°C / min and the liquid was drained; In this embodiment, the first dye is Agasite Yellow NHK (used in an amount of 0.025% owf), Agasite Red NHK (used in an amount of 0.02% owf) and Agasite Blue NHK (used in an amount of 0.03% owf); the second dye is Agasite Yellow NF-3R (used in an amount of 0.08% owf), Agasite Red NF-3B (used in an amount of 0.033% owf) and Agasite Blue NF-BN (used in an amount of 0.1% owf).

[0026] Post-processing: After draining, re-fill with water and rinse for 10 minutes. After draining, re-fill with 90℃ hot water for 10 minutes, cool to 70℃ and drain. After draining, re-wash with 60℃ hot water for 10 minutes to drain. After draining the liquid, re-add water and wash for 10 minutes to drain the liquid and remove the cloth.

[0027] Example 2 A dyeing process for a Tencel / wool / nylon / spandex blended fabric, wherein the blended fabric comprises 54% Tencel, 13% wool, 30% nylon and 3% spandex, and the desired dyeing is a medium color, specifically purple.

[0028] The dyeing process specifically includes the following steps: Pre-treatment: The blended fabric was refined and the Tencel wool nylon spandex blended fabric was put into the dye vat of the overflow dyeing machine with a bath ratio of 1:10. The temperature was raised to 40°C, 0.75wt% chromatophore AP-B was added and kept warm for 10 minutes, 2.5wt% chromatophore AP-A was added and kept warm for 10 minutes, 2wt% hydrogen peroxide was added and kept warm for 10 minutes, the temperature was raised to 80°C (3°C / min), kept warm for 45 minutes, cooled to 70°C (1°C / min) and drained, washed twice with 60°C hot water for 10 minutes each time, washed with 1g / L glacial acetic acid for 10 minutes, 0.06g / L deoxidizer (deoxidase DQ-8682) was added within 10 minutes, and circulated for 15 minutes without draining.

[0029] dyeing: The pre-treated blended fabric was directly heated to 40°C in the dye vat, and Farmanfeng SP (1g / L) was added and circulated for 5 minutes. The dye resist N-BSN (5g / L) was added and circulated for 5 minutes. 45g / L sodium sulfate was evenly added within 20 minutes and circulated for 10 minutes. The first dye was evenly added within 30 minutes and circulated for 5 minutes. The second dye was evenly added within 30 minutes and circulated for 5 minutes. The temperature was then raised to 100°C at a rate of 1°C / min and kept at this temperature for 45 minutes. The temperature was then lowered to 70°C at a rate of 1°C / min and the liquid was then drained. In this embodiment, the first dye is Agaset Red NHK (0.18% owf) and Agaset Blue NHK (0.29% owf), and the second dye is Agaset Red NF-3B (0.25% owf) and Agaset Blue NF-BN (0.75% owf).

[0030] Post-processing: Water washing: re-fill with water and wash for 10 minutes and drain; Hot washing: refill water and raise the temperature to 90℃, keep it warm for 10 minutes for hot washing, cool it down to 70℃ (1℃ / min) and drain the liquid; Hot wash: Refill water and raise the temperature to 90℃, keep it warm for 10 minutes for hot washing, cool it down to 70℃ (1℃ / min) and drain the liquid; Hot wash: refill water and raise the temperature to 60℃, keep warm for 10 minutes and drain; Hot wash: refill water and raise the temperature to 45℃, keep warm for 10 minutes and drain; Water washing: Add water to wash the cloth again for 10 minutes, and drain the liquid out of the cloth.

[0031] Example 3 A dyeing process for a Tencel / wool / nylon / spandex blended fabric is disclosed. The blended fabric comprises 54% Tencel, 13% wool, 30% nylon and 3% spandex, and the desired dyeing is a dark color, specifically dark brown.

[0032] The dyeing process specifically includes the following steps: Pre-treatment: The blended fabric was refined and the Tencel wool nylon spandex blended fabric was put into the dye vat of the overflow dyeing machine with a bath ratio of 1:10. The penetrant GS-10 (1 g / L) was added and kept warm for 5 minutes. Soda ash (1 g / L) was added and kept warm for 5 minutes. The degreaser LDA (1 g / L) was added and kept warm for 5 minutes. The temperature was raised to 90°C and kept warm for 45 minutes. The temperature was lowered to 70°C (1°C / min) and the liquid was drained. The fabric was put into water for hot washing at 80°C*10 minutes. The temperature was lowered to 70°C (1°C / min) and the liquid was drained. The fabric was put into water for hot washing at 60°C*10 minutes and the liquid was drained. The fabric was put into water for washing for 10 minutes and the liquid was drained.

[0033] dyeing: The pre-treated blended fabric was placed in a dye vat, refilled with water at a bath ratio of 1:10, and heated directly to 40 degrees Celsius. 1 g / L of Farman was added and circulated for 5 minutes. 5 g / L of resist N-BSN was added and circulated for 5 minutes. 50 g / L of sodium sulfate was evenly added within 20 minutes and circulated for 10 minutes. The first dye was evenly added within 30 minutes and circulated for 5 minutes. The second dye was evenly added within 30 minutes and circulated for 5 minutes. The temperature was then raised to 100 degrees Celsius at a rate of 1 degrees Celsius / min and kept warm for 60 minutes. The temperature was then lowered to 70 degrees Celsius at a rate of 1 degrees Celsius / min and the liquid was then discharged. In this embodiment, the first dye is Agasite Yellow NHK (0.24% owf), Agasite Red NHK (0.19% owf) and Agasite Blue NHK (0.29% owf), and the second dye is Agasite Yellow NF-3R (0.75% owf), Agasite Red NF-3B (0.3% owf) and Agasite Blue NF-BN (0.95% owf).

[0034] Post-processing: Water washing: refill water and wash for 10 minutes and then drain; Soaping: Add 1g / L of non-foaming soaping agent for 5min, heat to 90℃, keep warm for 10min to soap, cool to 70℃ (1℃ / min) and drain; Hot wash: Refill water and raise the temperature to 90℃, keep it warm for 10 minutes for hot washing, cool it down to 70℃ (1℃ / min) and drain the liquid; Hot wash: refill water and raise the temperature to 60℃, keep warm for 10 minutes and drain; Hot wash: refill water and raise the temperature to 45℃, keep warm for 10 minutes and drain; Water washing: Add water to wash the cloth again for 10 minutes, and drain the liquid out of the cloth.

[0035] Example 4 A dyeing process for a Tencel / wool / nylon / spandex blended fabric is disclosed. The blended fabric comprises 54% Tencel, 13% wool, 30% nylon and 3% spandex, and is required to be dyed to a dark color, specifically black.

[0036] The dyeing process specifically includes the following steps Pre-treatment: The blended fabric was refined and the Tencel wool nylon spandex blended fabric was put into the dye vat of the overflow dyeing machine with a bath ratio of 1:10. The penetrant GS-10 (1 g / L) was added and kept warm for 5 minutes. Soda ash (1 g / L) was added and kept warm for 5 minutes. The degreaser LDA (1 g / L) was added and kept warm for 5 minutes. The temperature was raised to 90°C and kept warm for 45 minutes. The temperature was lowered to 70°C (1°C / min) and the liquid was drained. The fabric was put into water for hot washing at 80°C*10 minutes. The temperature was lowered to 70°C (1°C / min) and the liquid was drained. The fabric was put into water for hot washing at 60°C*10 minutes and the liquid was drained. The fabric was put into water for washing for 10 minutes and the liquid was drained.

[0037] dyeing: Re-enter the dye vat with water (bath ratio of 1:10), heat the pre-treated blended fabric directly to 40°C in the dye vat, add 1g / L of Farmanfeng and circulate for 5 minutes, add 5g / L of anti-dyeing agent N-BSN and circulate for 5 minutes, evenly add 80g / L sodium sulfate within 20 minutes, circulate for 10 minutes, evenly add the first dye within 30 minutes and circulate for 5 minutes, evenly add the second dye within 30 minutes, circulate for 5 minutes, then heat up to 100°C at a rate of 1°C / min and keep warm for 60 minutes, cool down to 60 degrees at a rate of 1°C / min, add soda ash (5g / L) for 30 minutes, keep warm for 30 minutes and then drain. In this embodiment, the first dye is Agarset Black MR (1.5% owf), and the second dye is Agarset Black EN (3.5% owf).

[0038] Post-processing: Water washing: re-fill with water and wash for 10 minutes and drain; Soaping: Add 1g / L non-foaming soaping agent for 5 minutes, heat to 90℃, keep warm for 10 minutes to soap, cool to 70℃ (1℃ / min) and drain; Soaping: Add 1g / L non-foaming soaping agent for 5 minutes, heat to 90℃, keep warm for 10 minutes to soap, cool to 70℃ (1℃ / min) and drain; Hot wash: refill water and raise the temperature to 60℃, keep warm for 10 minutes and drain; Fixation: refill water, add 3% fixing agent (DM2518) for 15 minutes, heat to 45℃, keep warm for 20 minutes and drain; Hot wash: refill water and raise the temperature to 45℃, keep warm for 10 minutes and drain; Water washing: put the cloth into water to wash for 10 minutes, then drain the liquid and take out the cloth.

[0039] Comparative Example 1 The compositions of the blended fabrics in this comparative example are the same as those in Example 1.

[0040] The dyeing process of this comparative example differs from that of Example 1 in that the first dye is NYLOSAN YELLOWMF-RL at 0.01% owf, NYLONSAN RED N-2RBL at 0.01% owf, and NYLONSAN BLUE N-BLN at 0.02% owf; the second dye is AVITERA YELLOW EC-2R at 0.065% owf, AVITERA RED EC-2BL at 0.115% owf, and NOVACRON LIGHT BLUE SE at 0.165% owf; and the dyeing process is carried out according to the two-bath method.

[0041] Pre-treatment: The blended fabric was refined and the Tencel wool nylon spandex blended fabric was put into the dye vat of the overflow dyeing machine with a bath ratio of 1:10. The temperature was raised to 40°C, 0.75% chromatophore AP-B was added for 10 minutes, 2.5% chromatophore AP-A was added for 10 minutes, 2% hydrogen peroxide was added for 10 minutes, the temperature was raised to 80°C (3°C / min), kept warm for 45 minutes, cooled to 70°C (1°C / min), drained, washed twice with 60°C hot water for 10 minutes each time, washed with 1g / L glacial acetic acid for 10 minutes, 0.06g / L deoxidizer (deoxidase DQ-8682) was added within 10 minutes, and circulated for 15 minutes without draining.

[0042] Dyeing Tencel: The pre-treated blended fabric is directly heated to 40°C in the dye vat, 5g / L of dye resist N-BSN is added, circulated for 5 minutes, 30g / L of sodium sulfate is evenly added within 20 minutes, circulated for 10 minutes, the first dye is evenly added within 30 minutes, and the cycle is heated for 5 minutes. The temperature is raised to 60°C at a rate of 1°C / min and kept warm for 60 minutes. 10g / L of soda ash is evenly added for 30 minutes, and the liquid is drained after keeping warm for 60 minutes.

[0043] Post-processing: After draining, rinse with water for 10 minutes. After draining, re-fill with 90℃ hot water for 10 minutes, cool to 70℃ and drain. After draining, re-wash with 60℃ hot water for 10 minutes to drain. After draining the liquid, re-add water and wash for 10 minutes to drain the liquid and remove the cloth.

[0044] Dyeing wool and nylon: After dyeing Tencel, the blended fabric is directly heated to 40°C in the dyeing vat, acetic acid is added, circulated for 5 minutes, sodium acetate is added, circulated for 5 minutes, half of the second dye is evenly added within 20 minutes, circulated for 5 minutes, half of the second dye is evenly added within 20 minutes, circulated for 5 minutes, heated to 70°C at 1°C / min, kept warm for 5 minutes, heated to 84°C at 1°C / min, kept warm for 5 minutes, then heated to 98°C at 0.5°C / min, kept warm for 60 minutes, cooled to 60°C and discharged.

[0045] Post-processing: Washing: Re-wash with water for 10 minutes. Hot water washing: Refill the water and wash with 70℃ hot water for 15 minutes. Hot water washing: Refill the water and add 70℃ hot water to wash for 15 minutes. Hot water washing: re-wash with 60℃ hot water for 15 minutes. Water washing: Re-wash with water for 10 minutes.

[0046] Comparative Example 2 The composition and dyeing of the blended fabric in this comparative example are the same as those in Example 4.

[0047] The dyeing process of this comparative example is different from that of Example 4 in that 1.3% of MDL black is used as the first dye, 3.5% of Jagersul black is used as the second dye, and a two-bath method is used for dyeing.

[0048] Specifically, the two-bath method has the following steps: Pre-treatment: The blended fabric was refined and the Tencel wool nylon spandex blended fabric was put into the dye vat of the overflow dyeing machine with a bath ratio of 1:10. The penetrant GS-10 (1g / L) was added for 5 minutes, soda ash (1g / L) was added for 5 minutes, and the degreaser LDA (1g / L) was added for 5 minutes. The temperature was raised to 90°C and kept for 45 minutes. The temperature was lowered to 70°C (1°C / min) and the liquid was drained. The fabric was put into water for hot washing at 80°C*10 minutes, the temperature was lowered to 70°C (1°C / min) and the liquid was drained. The fabric was put into water for hot washing at 60°C*10 minutes and the liquid was drained. The fabric was put into water for washing for 10 minutes and the liquid was drained.

[0049] Dyeing Tencel: Heat the pre-treated blended fabric directly to 40°C in the dye vat, add 5g / L resist N-BSN, circulate for 5 minutes, evenly add 80g / L sodium sulfate within 20 minutes, circulate for 10 minutes, evenly add the first dye within 30 minutes, circulate for 5 minutes and heat treatment, heat to 60°C at a rate of 1°C / min and keep warm for 60 minutes, evenly add 20g / L soda ash within 30 minutes, keep warm for 60 minutes and drain.

[0050] Post-processing: Water washing: re-fill with water and wash for 10 minutes and drain; Soaping: Add 1g / L non-foaming soaping agent for 5 minutes, heat to 90℃, keep warm for 10 minutes to soap, cool to 70℃ (1℃ / min) and drain; Soaping: Add 1g / L non-foaming soaping agent for 5 minutes, heat to 90℃, keep warm for 10 minutes to soap, cool to 70℃ (1℃ / min) and drain; Hot wash: refill water and raise the temperature to 60℃, keep warm for 10 minutes and drain; Water washing: put the cloth into water to wash for 10 minutes, then drain the liquid and take out the cloth.

[0051] Dyeing wool and nylon: After dyeing Tencel, the blended fabric is directly heated to 40°C in the dyeing vat, acetic acid is added, circulated for 5 minutes, sodium acetate is added, circulated for 5 minutes, half of the second dye is evenly added within 20 minutes, circulated for 5 minutes, half of the second dye is evenly added within 20 minutes, circulated for 5 minutes, heated to 70°C at 1°C / min, kept warm for 5 minutes, heated to 84°C at 1°C / min, kept warm for 5 minutes, then heated to 98°C at 1°C / min, kept warm for 60 minutes, cooled to 60°C and discharged.

[0052] Post-processing: Washing: Re-wash with water for 10 minutes. Hot water washing: Refill water, add 2g / L Bk-35 and wash in 70℃ hot water for 15 minutes. Hot water washing: Refill water, add 2g / L Bk-35 and wash in 70℃ hot water for 15 minutes. Hot water washing: re-wash with 60℃ hot water for 15 minutes. Water washing: Re-wash with water for 10 minutes.

[0053] Fixation: refill water, add 3% fixing agent (DM2518) for 15 minutes, heat to 45℃, keep warm for 20 minutes and drain; Hot wash: refill water and raise the temperature to 45℃, keep warm for 10 minutes and drain; Water washing: re-wash with water for 10 minutes; Water washing: put the cloth into water to wash for 10 minutes, then drain the liquid and take out the cloth.

[0054] Experimental Example 1: Fastness Test The blended fabrics prepared in Examples 1 to 4 were subjected to fastness tests, and the fastness to rubbing of the fabrics was tested with reference to GB / T3920-2008 “Textiles — Tests for Color Fastness — Color Fastness to Rubbing”, the fastness to washing of the fabrics was tested with reference to GB / T3921-2008 “Textiles — Tests for Color Fastness — Color Fastness to Washing”, and the color fastness to perspiration of the fabrics was tested with reference to GB / T3922-2013 “Textiles — Tests for Color Fastness — Color Fastness to Perspiration”. The fastness to chlorine bleaching was tested using the Japanese standard JIS-L0884 method, and the light fastness was tested using the Japanese standard JIS-LO843 method.

[0055] Table 1 Fastness comparison

[0056] It can be seen from the data in Table 1 that, through the detection of various indicators, all indicators are relatively good. However, the dyeing processes of Comparative Examples 1 and 2 are complicated.

[0057] like Figure 9-12The following are actual images of the color separation of Example 1, Comparative Example 1, Example 4, and Comparative Example 2, respectively. As can be seen from the images, compared to Comparative Example 1, Example 1 has better colorimetric properties, overcoming the color separation problem between Tencel and wool and nylon. Compared to Comparative Example 2, Example 4 has even better colorimetric properties. In Examples 1-4, Agarset NHK and M series dyes were used to dye nylon and wool, and Agarsol NF and EN alkali-free and low-alkali reactive dyes were used to dye Tencel. At the same time, a resist agent, N-BSN, was used to prevent staining of nylon and wool by the reactive dyes. Because Tencel and wool are blended yarns interwoven with nylon core-spun yarn, no color separation between Tencel and wool can be seen when the Tencel and wool blended yarn is pulled out separately. The one-bath dyeing method has good colorimetric properties, and there is no color separation problem between Tencel and wool or nylon.

[0058] In Examples 1-4, a one-bath dyeing process was used to achieve one-bath dyeing of Tencel, wool, nylon, and spandex blended fabrics. Because the fixation conditions were neutral and weakly alkaline, damage to the wool caused by strong alkaline fixation was avoided. This significantly shortened dyeing time, reducing the wear and tear of wool fabrics caused by prolonged operation in the dyeing machine. It also reduced the hairiness of Tencel fibers caused by prolonged operation, significantly improving the surface finish of the fabric.

Claims

1. A dyeing process for Tencel / wool / nylon / spandex blended fabric, characterized in that: The steps include: S1, refining the blended fabric; S2. Add water to the blended fabric treated in step S1, raise the temperature to 40-45°C, and sequentially add 1-1.5 g / L of Farmanfeng SP, 3-6 g / L of resist N-BSN, 20-80 g / L of sodium sulfate, the first dye, and the second dye. Raise the temperature to 90-100°C at a rate of 0.5-1.5°C / min and hold for 30-60 min. Lower the temperature to 60-70°C at a rate of 1-1.5°C / min, drain the liquid, perform post-processing, and discharge the fabric. In step S2, the pH range of the liquid environment in which the blended fabric is located is 7-7.

5.

2. The dyeing process of Tencel / wool / nylon / spandex blended fabric according to claim 1, characterized in that: In step S2, the first dye is selected from Agaset NHK series dyes and / or Agaset M series dyes, and the second dye is selected from Agaset NF series dyes and / or Agaset EN series dyes.

3. The dyeing process of Tencel / wool / nylon / spandex blended fabric according to claim 1, characterized in that: Step S2 includes: After adding Farmanfeng SP and circulating for 5 minutes, add the anti-dyeing agent N-BSN, add N-BSN and circulate for 5 minutes, add sodium sulfate within 20 minutes, and circulate for 10 minutes before adding the first dye, evenly add the first dye within 30 minutes and circulate for 5 minutes, then add the second dye, evenly add the second dye within 30 minutes and circulate for 5 minutes before heating.

4. The dyeing process of Tencel / wool / nylon / spandex blended fabric according to claim 1, characterized in that: In step S1, the refining treatment is oxygen bleaching or oil removal.

5. The dyeing process of Tencel / wool / nylon / spandex blended fabric according to claim 4, characterized in that: When the desired dyeing is light or medium color, oxygen bleaching is selected as the refining treatment; when the desired dyeing is dark color, degreasing is selected as the refining treatment; Light color refers to dye dosage less than 0.5% owf, medium color refers to dye dosage of 0.5t%-1.5% owf, and dark color refers to dye dosage greater than 1.5% owf.

6. The dyeing process of Tencel / wool / nylon / spandex blended fabric according to claim 5, characterized in that: The oxygen bleaching treatment steps are as follows: Add clean water to the blended fabric at a bath ratio of 1:10, raise the temperature to 40°C, add 0.75wt% chromatophore AP-B and keep warm for 10 minutes, add 2.5wt% chromatophore AP-A and keep warm for 10 minutes, add 2wt% hydrogen peroxide and keep warm for 10 minutes, raise the temperature to 80°C at a rate of 3°C / min, keep warm for 45 minutes, cool to 70°C at a rate of 1°C / min, drain, wash twice with 60°C hot water, each time for 10 minutes, wash with 1g / L glacial acetic acid for 10 minutes, add 0.06g / L deoxidizer within 10 minutes, and circulate for 15 minutes without draining.

7. The dyeing process of Tencel / wool / nylon / spandex blended fabric according to claim 5, characterized in that: The degreasing process steps are as follows: Add clean water to the blended fabric at a bath ratio of 1:10, add 1g / L of penetrant GS-10 and keep warm for 5 minutes, add 1g / L of soda ash and keep warm for 5 minutes, add 1g / L of degreaser LDA and keep warm for 5 minutes, heat to 90℃ and keep warm for 45 minutes, cool to 70℃ at a rate of 1℃ / min and drain, put into water for hot washing at 80℃ and keep warm for 10 minutes, cool to 70℃ at a rate of 1℃ / min and drain, add water for hot washing at 60℃ and keep warm for 10 minutes and drain, add washing water and keep warm for 10 minutes and drain.

8. The dyeing process of Tencel / wool / nylon / spandex blended fabric according to claim 1, characterized in that: In step S2, the mass ratio of the blended fabric to water is 1:(10-15).

9. The dyeing process of Tencel / wool / nylon / spandex blended fabric according to claim 1, characterized in that: In step S2, the post-treatment method is one or more of water washing, hot washing, soap washing, and color fixing.

10. The dyeing process of Tencel / wool / nylon / spandex blended fabric according to claim 1, characterized in that: The deoxidizer is deoxygenase DQ-8682.

Images