阅读说明：本技术 一种涤棉混纺纱的植物染料一浴法染色方法 (Plant dye one-bath method dyeing method of polyester-cotton blended yarn ) 是由 陈叶清 余强 吴海卿 王瑞楠 连倩倩 于 2021-08-10 设计创作，主要内容包括：一种涤棉混纺纱的植物染料一浴法染色方法,涉及纱线染色技术领域,首先进行纱线前处理,并通过超临界CO2萃取方法提取天然植物染料,然后将纱线放入缸体内,加入清水,植物染料,其浴比为1:10,加入渗透剂、分散剂,甲酸,升温至50℃后加入元明粉,在继续升温至85℃,保温40min后排水、水洗；加入中性皂片,以2℃/min的速度升温至45℃,保温20min,加入纯碱,保温10min,排水、水洗；最后加入固色剂,升温至60℃,保温20min,排水、水洗即可完成染色。本发明能实现使用环保的植物染料对混纺纱进行一浴法染色,且上染率能达到90%,色牢度等均符合标准,同时对于相同质量的纱线的染色可节约水50%左右,一缸纱线染色的时间也节约2-3小时。(A plant dye one-bath method dyeing method of polyester-cotton blended yarn relates to the technical field of yarn dyeing, firstly, yarn pretreatment is carried out, natural plant dye is extracted by a supercritical CO2 extraction method, then the yarn is placed in a cylinder body, clear water and plant dye are added, the bath ratio is 1:10, penetrant, dispersant and formic acid are added, sodium sulfate is added after the temperature is raised to 50 ℃, the temperature is raised to 85 ℃ continuously, the temperature is kept for 40min, and then water is drained and washed; adding neutral soap flakes, heating to 45 deg.C at a speed of 2 deg.C/min, maintaining for 20min, adding sodium carbonate, maintaining for 10min, draining, and washing with water; and finally, adding a color fixing agent, heating to 60 ℃, preserving heat for 20min, draining water, and washing to finish dyeing. The invention can realize one-bath dyeing of the blended yarn by using the environment-friendly plant dye, the dye uptake can reach 90 percent, the color fastness and the like meet the standard, meanwhile, about 50 percent of water can be saved for dyeing the yarn with the same quality, and the time for dyeing the yarn in one cylinder is also saved for 2 to 3 hours.)

1. A plant dye one-bath method dyeing method of polyester-cotton blended yarn is characterized by comprising the following steps:

step 1, pretreatment: putting the yarns into a dye vat, adding clear water, and keeping the bath ratio of 1: 4-6; adding glacial acetic acid and an accelerating agent into a dye vat, heating to 60-80 ℃, preserving heat for 20-40min, heating to 90 ℃ at the speed of 1 ℃/min, preserving heat for 10min, cooling to 30 ℃ at the speed of 2 ℃/min, and draining;

step 2, dyeing: putting the yarns into a dye vat, adding clear water and plant dye at a bath ratio of 1:10, adding a penetrating agent, a dispersing agent and formic acid, heating to 50 ℃, adding anhydrous sodium sulphate, continuously heating to 85 ℃, keeping the temperature for 40min, draining water, and washing with water;

step 3, soaping: adding neutral soap flakes, heating to 45 deg.C at a speed of 2 deg.C/min, maintaining for 20min, adding sodium carbonate, maintaining for 10min, draining, and washing with water;

and 4, color fixation: adding a color fixing agent, heating to 60 ℃, keeping the temperature for 20min, draining water, and washing with water to finish dyeing.

2. The plant dye one-bath dyeing method of polyester-cotton blended yarn according to claim 1, characterized in that in step 1, the amount of glacial acetic acid added is 6-10g/L and the amount of dyeing accelerant is 4-6 g/L.

3. The plant dye one-bath dyeing method of polyester-cotton blended yarn according to claim 2, characterized in that the accelerating agent is urea.

4. The plant dye one-bath dyeing method of polyester-cotton blended yarn according to claim 1, characterized in that in the step 2, the plant dye is alkannin, and SFE-CO is adopted₂Extracting to collect alkannin, specifically using Onosma paniculatum as raw material, and extracting with supercritical CO₂The extraction technology is used for extracting the alkannin under the conditions that the extraction pressure is 20 mPa and the extraction temperature is 35 ℃.

5. The plant dye one-bath dyeing method of polyester-cotton blended yarn as claimed in claim 4, characterized in that the mass concentration of the natural plant dye added in step 2 is 100-200g/L, the amount of the penetrating agent is 10-12g/L, the amount of the dispersing agent is 10-15g/L, the amount of formic acid is 10-12g/L, and the amount of anhydrous sodium sulphate is 40-60 g/L.

6. The vegetable dye one-bath dyeing method of polyester-cotton blended yarn according to claim 1, characterized in that in step 3, the amount of the added neutral soap flakes is 1-3g/L and the amount of the added soda is 3-5 g/L.

7. The plant dye one-bath dyeing method of polyester-cotton blended yarn according to claim 1, characterized in that in step 4, the amount of the fixing agent added is 2 g/L.

8. The plant dye one-bath dyeing method of polyester-cotton blended yarn according to claim 7, characterized in that the fixing agent is sodium carbonate.

Technical Field

The invention relates to the technical field of yarn dyeing, in particular to a vegetable dye one-bath method dyeing method of polyester-cotton blended yarns.

Background

In recent years, with the increasing shortage of natural resources such as petroleum and the potential harm of synthetic dyes to human health, the textile dye which can replace the synthetic dyes and is safe and environment-friendly is found to seriously pollute the living environment, so that the sustainable development of the textile industry is ensured, and the textile dye becomes a consensus of the industry.

In the prior art, polyester cotton, polyester viscose and other yarns are dyed by a two-bath method, a complete dyeing process is carried out twice, different components are dyed, the number of working procedures is large, the technological process is long, the dyeing difference is large, the consumed water amount is large, and the yarn dyeing time is long.

Disclosure of Invention

The invention aims to solve the technical defects and provide a plant dye one-bath method for dyeing polyester-cotton blended yarns, which is safe and environment-friendly and can save water and dyeing time.

In order to achieve the purpose, the invention designs a vegetable dye one-bath method dyeing method of polyester-cotton blended yarn, which comprises the following steps:

step 1, pretreatment: putting the yarns into a dye vat, adding clear water, and keeping the bath ratio of 1: 4-6; adding glacial acetic acid and an accelerating agent into a dye vat, heating to 60-80 ℃, preserving heat for 20-40min, heating to 90 ℃ at the speed of 1 ℃/min, preserving heat for 10min, cooling to 30 ℃ at the speed of 2 ℃/min, and draining;

step 2, dyeing: putting the yarns into a dye vat, adding clear water and plant dye at a bath ratio of 1:10, adding a penetrating agent, a dispersing agent and formic acid, heating to 50 ℃, adding anhydrous sodium sulphate, continuously heating to 85 ℃, keeping the temperature for 40min, draining water, and washing with water;

step 3, soaping: adding neutral soap flakes, heating to 45 deg.C at a speed of 2 deg.C/min, maintaining for 20min, adding sodium carbonate, maintaining for 10min, draining, and washing with water;

and 4, color fixation: adding a color fixing agent, heating to 60 ℃, keeping the temperature for 20min, draining water, and washing with water to finish dyeing.

In the step 1, the amount of the glacial acetic acid is 6-10g/L, the amount of the accelerant is 4-6g/L, and the accelerant is urea.

In the step 2, the adopted vegetable dye is alkannin, and the alkannin is collected by adopting an SFE-CO2 extraction method. Specifically, the arnebia euchroma (Royle) Johnst is used as a raw material, and the lithospermum pigment is extracted by a supercritical CO2 extraction technology under the conditions that the extraction pressure is 20m Pa and the extraction temperature is 35 ℃.

The mass concentration of the natural plant dye added in the step 2 is 100-200g/L, the amount of the penetrating agent is 10-12g/L, the amount of the dispersing agent is 10-15g/L, the amount of the formic acid is 10-12g/L, and the amount of the anhydrous sodium sulphate is 40-60 g/L. The penetrant and dispersant are conventional agents available on the market.

In the step 3, the amount of the added neutral soap flakes is 1-3g/L, and the amount of the soda ash is 3-5 g/L.

In the step 4, the amount of the color fixing agent added is 2g/L, and the color fixing agent is sodium carbonate.

The invention can realize one-bath dyeing of the blended yarn through reasonable procedures and design of the using amount of the auxiliary agent, the dye uptake can reach 90 percent, the dyeing color fastness and the like meet the standard, the dyeing performance is improved, the water and energy consumption is reduced, the dyeing cost is lower, about 50 percent of water can be saved for dyeing the yarn with the same quality, and the time for dyeing the yarn in one cylinder is also saved for 2 to 3 hours.

Detailed Description

The invention is further described below by way of examples.

In the invention, the color difference of the dyed yarns is evaluated according to GB 250-.

The arnebia euchroma pigment used in the following embodiments is arnebia euchroma pigment collected by an SFE-CO2 extraction method, and specifically arnebia euchroma is taken as a raw material, and is extracted by a supercritical CO2 extraction technology under the extraction pressure of 20m Pa and the extraction temperature of 35 ℃.

Example 1:

a plant dye one-bath method dyeing method of polyester-cotton blended yarn comprises the following steps: (1) pre-treating, namely putting the yarns into a dye vat, and adding clear water at a bath ratio of 1: 4; adding 6g/L glacial acetic acid and 4g/L accelerating agent urea into a dye vat, heating to 60 ℃, preserving heat for 20min, heating to 90 ℃ at the speed of 1 ℃/min, preserving heat for 10min, cooling to 30 ℃ at the speed of 2 ℃/min, and draining; (2) dyeing, namely putting the yarns into a dye vat, adding clear water, wherein the mass concentration of the added alkannin is 100g/L, and the bath ratio is 1:10, adding 12g/L of penetrating agent, 15g/L of dispersing agent and 12g/L of formic acid, heating to 50 ℃, adding 40g/L of anhydrous sodium sulphate, continuously heating to 85 ℃, keeping the temperature for 40min, draining water, and washing with water; (3) soaping, adding neutral soap flakes 3g/L, heating to 45 ℃ at the speed of 2 ℃/min, preserving heat for 20min, adding soda 3g/L, preserving heat for 10min, draining water, and washing with water; (4) and (3) fixing color, adding a color fixing agent sodium carbonate 2g/L, heating to 60 ℃, keeping the temperature for 20min, draining water, and washing with water to finish dyeing. The color fastness of the polyester-cotton blended dyed yarn is shown in table 1.

Example 2:

a plant dye one-bath method dyeing method of polyester-cotton blended yarn comprises the following steps: (1) pre-treating, namely putting the yarns into a dye vat, and adding clear water at a bath ratio of 1: 6; adding glacial acetic acid 10g/L and accelerating agent urea 5g/L into a dye vat, heating to 70 ℃, preserving heat for 30min, heating to 90 ℃ at the speed of 1 ℃/min, preserving heat for 10min, cooling to 30 ℃ at the speed of 2 ℃/min, and draining; (2) dyeing, namely putting the yarns into a dye vat, adding clear water, adding lithospermum pigment with the mass concentration of 200g/L and the bath ratio of 1:10, adding 11g/L of penetrating agent, 13g/L of dispersing agent and 11g/L of formic acid, heating to 50 ℃, adding 60g/L of anhydrous sodium sulphate, continuously heating to 85 ℃, keeping the temperature for 40min, draining water, and washing with water; (3) soaping, adding 1g/L neutral soap flakes, heating to 45 ℃ at the speed of 2 ℃/min, preserving heat for 20min, adding 5g/L sodium carbonate, preserving heat for 10min, draining and washing; (4) and (3) fixing color, adding a color fixing agent sodium carbonate 2g/L, heating to 60 ℃, keeping the temperature for 20min, draining water, and washing with water to finish dyeing. The color fastness of the polyester-cotton blended dyed yarn is shown in table 1.

Example 3:

a plant dye one-bath method dyeing method of polyester-cotton blended yarn comprises the following steps: (1) pre-treating, namely putting the yarns into a dye vat, and adding clear water at a bath ratio of 1: 5; adding 8g/L glacial acetic acid and 6g/L accelerating agent urea into a dye vat, heating to 80 ℃, preserving heat for 40min, heating to 90 ℃ at the speed of 1 ℃/min, preserving heat for 10min, cooling to 30 ℃ at the speed of 2 ℃/min, and draining; (2) dyeing, namely putting the yarns into a dye vat, adding clear water, adding lithospermum pigment with the mass concentration of 150g/L and the bath ratio of 1:10, adding 10g/L of penetrating agent, 10g/L of dispersing agent and 10g/L of formic acid, heating to 50 ℃, adding 50g/L of anhydrous sodium sulphate, continuously heating to 85 ℃, keeping the temperature for 40min, draining water, and washing with water; (3) soaping, adding neutral soap flakes 2g/L, heating to 45 ℃ at a speed of 2 ℃/min, preserving heat for 20min, adding sodium carbonate 4g/L, preserving heat for 10min, draining water, and washing with water; (4) and (3) fixing color, adding a color fixing agent sodium carbonate 2g/L, heating to 60 ℃, keeping the temperature for 20min, draining water, and washing with water to finish dyeing. The color fastness of the polyester-cotton blended dyed yarn is shown in table 1.

TABLE 1 color fastness of various dyed polyester-cotton blend yarns