阅读说明：本技术 一种羊毛毛条的天然染色方法 (Natural dyeing method of wool tops ) 是由 陈宜灿 张明耀 王祥荣 于 2021-10-14 设计创作，主要内容包括：本发明涉及纺织印染技术领域,具体涉及一种羊毛毛条的天然染色方法,包括以下步骤：采用复合生物酶对天然植物染料中的植物胶类物质进行降解处理,得到天然植物染料母液；将羊毛毛条浸入清水中,加入导染剂和分散剂,再加入上述天然植物染料母液混匀进行恒温染色；加入清水和明矾进行恒温媒染,经过后处理完成染色。本发明复合生物酶的使用有效降低了植物胶类物质对植物染料向羊毛纤维内部渗透的影响,减少了羊毛毛条球内外纤维染色的色差,提高了染色过程的均匀性和染色产品的质量；加入导染剂和分散剂进一步提高了染料的分散性,染料的渗透扩散和染色的均匀性；染色方法生态环保,操作简单,成本低,可广泛应用于毛条天然染料染色加工。(The invention relates to the technical field of textile printing and dyeing, in particular to a natural dyeing method of wool tops, which comprises the following steps: degrading plant gum substances in the natural plant dye by adopting composite biological enzyme to obtain natural plant dye mother liquor; immersing wool tops in clear water, adding a dye-guiding agent and a dispersing agent, adding the natural plant dye mother liquor, uniformly mixing, and dyeing at constant temperature; adding clear water and alum for constant-temperature mordant dyeing, and finishing dyeing through post-treatment. The use of the compound biological enzyme effectively reduces the influence of vegetable gum substances on the permeation of vegetable dyes into wool fibers, reduces the color difference of dyeing of fibers inside and outside wool top balls, and improves the uniformity of the dyeing process and the quality of dyed products; the addition of the dye-guiding agent and the dispersing agent further improves the dispersibility of the dye, the penetration and diffusion of the dye and the dyeing uniformity; the dyeing method is ecological and environment-friendly, is simple to operate, has low cost, and can be widely applied to dyeing and processing of wool top natural dye.)

1. A natural dyeing method of wool tops is characterized by comprising the following steps:

(1) heating and boiling a natural plant dye solution, cooling to 25-30 ℃, adjusting the pH value to 4.0-6.0, adding a compound biological enzyme, treating at 35-60 ℃ for 30-60 min, boiling to inactivate the compound biological enzyme, and cooling to 25-30 ℃ to obtain a natural plant dye mother solution;

(2) immersing wool tops into clear water according to a bath ratio of 1: 10-40, adding a dye-guiding agent and a dispersing agent, running for 5-8 min, adding the natural plant dye mother liquor, mixing uniformly to obtain a dye solution, adjusting the pH value to 3.0-5.0, dyeing at a constant temperature of 70-100 ℃ for 10-80 min, and cooling to 25-40 ℃;

(3) adding clear water again and alum again according to a bath ratio of 1: 10-40 to obtain mordant dyeing liquid, carrying out mordant dyeing at a constant temperature of 50-80 ℃ for 30-60 min, cooling to 25-40 ℃, discharging water, and sequentially carrying out soaping, washing, dewatering and drying to finish dyeing;

the compound biological enzyme consists of 20 percent of endo-type beta-mannase, 20 percent of pectin lyase, 30 percent of pectin esterase, 20 percent of subtilisin and 10 percent of lipase by mass fraction.

2. The natural dyeing method of wool tops according to claim 1, characterized in that the natural vegetable dye is selected from alizarin, pomegranate rind pigment, myrobalam pigment, chestnut shell pigment or catechin.

3. The natural dyeing method of wool tops according to claim 1, wherein the concentration of the natural plant dye mother liquor is 10-100 g/L.

4. The natural dyeing method of wool tops according to claim 1, wherein the concentration of the composite biological enzyme in the natural plant dye mother liquor is 0.5-2 g/L.

5. The natural dyeing method of wool tops according to claim 1, characterized in that the concentration of the dye-guiding agent in the dye solution is 0.5-2 g/L.

6. The natural dyeing method of wool tops according to claim 1, characterized in that the dispersant in the dye liquor is sodium lignosulfonate.

7. The natural dyeing method of wool tops according to claim 1 or 6, characterized in that the concentration of the dispersant in the dyeing liquid is 0.5-2 g/L.

8. The natural dyeing method of wool tops according to claim 1, characterized in that in steps (1) and (2), the pH is adjusted by adding citric acid and/or tartaric acid.

9. The natural dyeing method of wool tops according to claim 1, characterized in that in the step (3), alum is added in an amount of 2-8% o.w.f.

Technical Field

The invention relates to the technical field of textile printing and dyeing, in particular to a natural dyeing method of wool tops.

Background

The synthetic dyes with special structures can decompose carcinogenic aromatic amine or the dyes have sensitization and carcinogenicity and are limited to be used for dyeing textiles. The application of natural plant dyes extracted from roots, stems, leaves, flowers and fruits of various plants in textile dyeing is increasingly researched.

When natural plant dyes are extracted from roots, stems, leaves, flowers and fruits of various plants, a large amount of plant gum substances are often extracted in the extraction process, and when the plant dyes are applied to textile dyeing, the permeation of the plant dyes to textiles is greatly influenced by the presence of the plant gum substances, so that the uniformity of the dyeing process is influenced, the color difference of dyed products is serious, and the quality is not ensured. Especially, when the wool tops are dyed, the phenomenon is more obvious, and the color difference between the inside and the outside is serious.

With the increasing application of vegetable dyes, it is necessary to develop a dyeing method for improving the dyeing uniformity of natural dyes, so that the vegetable dye dyeing product meets the requirements of large-scale production.

Disclosure of Invention

The invention provides a natural dyeing method of wool tops, aiming at solving the problem of poor permeability and uniformity in the dyeing process of wool tops with vegetable dyes. The method adopts biological enzyme treatment, can effectively reduce the influence of natural high molecular compounds on the permeation of the plant dye into wool fibers, reduces the color difference of dyeing of fibers inside and outside the wool top balls, improves the uniformity of the dyeing process and the quality of dyeing products, and is ecological, environment-friendly and simple to operate.

According to the technical scheme provided by the invention, the natural dyeing method of the wool tops comprises the following steps:

(1) heating and boiling a natural plant dye solution, cooling to 25-30 ℃, adjusting the pH value to 4.0-6.0, adding a compound biological enzyme, treating at 35-60 ℃ for 30-60 min, boiling to inactivate the compound biological enzyme, and cooling to 25-30 ℃ to obtain a natural plant dye mother solution;

(2) immersing wool tops into clear water according to a bath ratio of 1: 10-40, adding a dye-guiding agent and a dispersing agent, running for 5-8 min, adding the natural plant dye mother liquor, mixing uniformly to obtain a dye solution, adjusting the pH value to 3.0-5.0, dyeing at a constant temperature of 70-100 ℃ for 10-80 min, and cooling to 25-40 ℃;

(3) adding clear water again and alum again according to a bath ratio of 1: 10-40 to obtain mordant dyeing liquid, carrying out mordant dyeing at a constant temperature of 50-80 ℃ for 30-60 min, cooling to 25-40 ℃, discharging water, and sequentially carrying out soaping, washing, dewatering and drying to finish dyeing;

the compound biological enzyme consists of 20 percent of endo-type beta-mannase, 20 percent of pectin lyase, 30 percent of pectin esterase, 20 percent of subtilisin and 10 percent of lipase by mass fraction.

Preferably, the natural plant dye is selected from alizarin, pomegranate rind pigment, myrobalam pigment, chestnut shell pigment or catechin.

Preferably, the concentration of the natural plant dye mother liquor is 10-100 g/L.

Preferably, the concentration of the composite biological enzyme in the natural plant dye mother liquor is 0.5-2 g/L.

Preferably, the concentration of the dye-guiding agent in the dye solution is 0.5-2 g/L.

Preferably, the dispersing agent in the dye solution is sodium lignosulfonate.

Preferably, the concentration of the dispersing agent in the dye solution is 0.5-2 g/L.

Preferably, in the steps (1) and (2), the pH value is adjusted by adding citric acid and/or tartaric acid.

Preferably, in the step (3), the adding amount of the alum is 2-8% o.w.f.

Specifically, the natural dyeing method of the wool tops comprises the following steps:

(1) preparation of dye mother liquor: weighing plant dye powder in a calculated amount, adding the plant dye powder into water under stirring to enable the concentration of a dye mother solution to be 10-100 g/L, heating and boiling for 10-30 min, cooling to 25-30 ℃, adjusting the pH value to be 4.0-6.0 by using citric acid, adding 0.5-2 g/L of composite biological enzyme (20% of endo-beta-mannase, 20% of pectin lyase, 30% of pectin esterase, 20% of subtilisin and 10% of lipase), stirring and reacting for 30-60 min at 35-60 ℃, boiling and inactivating, cooling to 25-30 ℃, and fixing the volume to obtain 10-100 g/L of natural plant dye mother solution;

(2) dyeing: balling wool tops, adding the balls into a wool top dyeing machine, adding clear water according to a bath ratio of 1: 10-40, adding 0.5-2 g/L of a dye-guiding agent and 0.5-2 g/L of a dispersing agent, and running for 5-8 min; adding the natural plant dye mother liquor according to the needs of shade and mixing uniformly, then adjusting the pH value of the dye liquor to 3.0-5.0 by using citric acid to obtain the dye liquor, heating to 70-100 ℃ at the heating rate of 1 ℃/min, dyeing at constant temperature for 10-80 min, cooling to 25-40 ℃, and discharging water;

(3) mordant dyeing: adding clear water again according to a bath ratio of 1: 10-40, adding alum of 2% -8% o.w.f to obtain mordant dye liquid, heating to 50-80 ℃, carrying out mordant dyeing at constant temperature for 30-60 min, cooling to 25-40 ℃, discharging water, then carrying out soaping, washing, dehydrating and drying to finish dyeing.

Compared with the prior art, the technical scheme of the invention has the following advantages:

(1) before dyeing, composite biological enzyme is adopted for degradation treatment, natural high molecular compounds such as vegetable gum, polysaccharide, fatty substances and the like in the vegetable dye are subjected to low molecular weight treatment, the influence of the natural high molecular compounds on the permeation of the vegetable dye into wool fibers is greatly reduced, and the uniformity in the dyeing process and the quality of a dyed product are improved; the dye dispersion is further improved by adding the dye-guiding agent and the dispersing agent into the dye solution, so that the penetration and diffusion of the dye solution to the interior of wool top fibers are promoted, the dyeing uniformity is improved, and the aims of reducing the dyeing color difference of the interior and exterior fibers of wool top balls and improving the uniformity of the dyeing process and the quality of dyed products are fulfilled;

(2) the wool top dyeing method is ecological and environment-friendly, simple to operate and low in cost, and can be widely applied to the printing and dyeing industry.

Detailed Description

The present invention is further illustrated by the following specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.

The raw materials adopted in the embodiment of the invention are all conventional raw materials sold in the market. Wherein the dye-guiding agent is a nonionic surfactant peregal O; the dispersant is sodium lignosulfonate.

Example 1

(1) Weighing 100g of Chinese chestnut shell pigment powder, adding the Chinese chestnut shell pigment powder into water under stirring to enable the concentration of a dye to be 50g/L, heating and boiling for 20min, cooling to 25-30 ℃, adjusting the pH value to 5.0 by using citric acid, adding 1g/L of compound biological enzyme (comprising 20% of endo-beta-mannase, 20% of pectin lyase, 30% of pectinesterase, 20% of subtilisin and 10% of lipase), stirring and reacting for 40min at the temperature of 45 ℃, then boiling and inactivating, cooling to 25-30 ℃, and fixing the volume to 2L to prepare 50g/L of Chinese chestnut shell pigment mother liquor;

(2) balling 5kg of wool tops, adding the wool tops into a top dyeing machine, adding clear water according to the bath ratio of 1:20, adding 0.1kg of nonionic surfactant peregal O and 0.15kg of sodium lignosulfonate, operating the dyeing machine for 5min, adding 2L of the Chinese chestnut shell pigment mother liquor prepared in the step (1), uniformly mixing, then adjusting the pH value of a dye solution to 4.0 by using citric acid, heating to 95 ℃ at the heating rate of 1 ℃/min, dyeing at constant temperature for 60min, cooling to 40 ℃, and discharging water;

(3) adding clear water again according to the bath ratio of 1:20, adding 300g of dissolved alum, heating to 60 ℃, carrying out constant-temperature mordant dyeing for 45min, cooling to 40 ℃, discharging water, and then carrying out soaping, washing, dehydrating and drying to finish dyeing.

Example 2

(1) Weighing 150g of Chinese chestnut shell pigment powder, adding the Chinese chestnut shell pigment powder into water while stirring to ensure that the concentration of dye is 10g/L, heating and boiling for 10min, cooling to 25-30 ℃, adjusting the pH value to 4.0 by using citric acid, adding 0.5g/L of compound biological enzyme (comprising 20% of endo-beta-mannase, 20% of pectin lyase, 30% of pectinesterase, 20% of subtilisin and 10% of lipase), stirring and reacting for 60min at the temperature of 35 ℃, then boiling and inactivating, cooling to 25-30 ℃, and fixing the volume to 15L to prepare 10g/L of Chinese chestnut shell pigment mother liquor;

(2) balling 5kg of wool tops, adding the wool tops into a top dyeing machine, adding clear water according to a bath ratio of 1:10, adding 0.05kg of nonionic surfactant peregal O and 0.1kg of sodium lignosulfonate, operating the dyeing machine for 6min, adding the Chinese chestnut shell pigment mother liquor prepared in the step (1) according to the requirements of color shade, uniformly mixing, then adjusting the pH value of the dye liquor to 3.0 by using citric acid, heating to 70 ℃ at a heating speed of 1 ℃/min, dyeing for 80min at a constant temperature, cooling to 40 ℃, and discharging water;

(3) adding clear water again according to the bath ratio of 1:10, adding 100g of dissolved alum, heating to 50 ℃, carrying out constant-temperature mordant dyeing for 60min, cooling to 40 ℃, discharging water, and then carrying out soaping, washing, dehydrating and drying to finish dyeing.

Example 3

(1) Weighing 200g of Chinese chestnut shell pigment powder, adding the Chinese chestnut shell pigment powder into water under stirring to ensure that the concentration of dye is 100g/L, heating and boiling for 30min, cooling to 25-30 ℃, adjusting the pH value to 6.0 by using citric acid, adding 2g/L of compound biological enzyme (comprising 20% of endo-beta-mannase, 20% of pectin lyase, 30% of pectinesterase, 20% of subtilisin and 10% of lipase), stirring and reacting for 30min at the temperature of 60 ℃, then boiling and inactivating, cooling to 25-30 ℃, and fixing the volume to 2L to prepare 100g/L Chinese chestnut shell pigment mother liquor;

(2) balling 5kg of wool tops, adding the wool tops into a top dyeing machine, adding clear water according to a bath ratio of 1:40, adding 0.2kg of nonionic surfactant peregal O and 0.3kg of sodium lignosulfonate, operating the dyeing machine for 8min, adding the Chinese chestnut shell pigment mother liquor prepared in the step (1) according to the requirements of color shade, uniformly mixing, then adjusting the pH value of the dye liquor to 5.0 by using citric acid, heating to 100 ℃ at a heating speed of 1 ℃/min, dyeing for 10min at a constant temperature, cooling to 40 ℃, and discharging water;

(3) adding clear water again according to the bath ratio of 1:40, adding 400g of dissolved alum, heating to 80 ℃, carrying out constant-temperature mordant dyeing for 30min, cooling to 40 ℃, discharging water, and then carrying out soaping, washing, dehydrating and drying to finish dyeing.

Examples 4 to 5

On the basis of the embodiment 1, the dosage of the non-ionic surfactant peregal O is adjusted to 0.05kg or 0.2 kg; the amount of sodium lignosulfonate was adjusted to 0.2kg or 0.05 kg.

Examples 6 to 7

The dosage of the non-ionic surfactant peregal O is adjusted to 0.025kg or 0.1kg on the basis of the embodiment 2; the amount of sodium lignosulfonate was adjusted to 0.1kg or 0.025 kg.

Examples 8 to 9

On the basis of the embodiment 3, the dosage of the non-ionic surfactant peregal O is adjusted to 0.1kg or 0.4 kg; the amount of sodium lignosulfonate was adjusted to 0.4kg or 0.1 kg.

Examples 10 to 13

The chestnut shell pigment powder is replaced by madder pigment powder, pomegranate rind pigment powder, myrobalan pigment or catechin powder on the basis of the embodiment 1.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.