CN109881502B - Indigo pulp and preparation method thereof - Google Patents
Indigo pulp and preparation method thereof Download PDFInfo
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- CN109881502B CN109881502B CN201910078556.5A CN201910078556A CN109881502B CN 109881502 B CN109881502 B CN 109881502B CN 201910078556 A CN201910078556 A CN 201910078556A CN 109881502 B CN109881502 B CN 109881502B
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Abstract
The application provides indigo pulp and a preparation method thereof, and belongs to the technical field of dyeing or printing of fabrics. Is prepared from natural rubber modified resin/fresh natural rubber, sodium alginate, gelatin, corn starch, indigo dye and purified water. The indigo blue paste is applied to dyeing or printing of all-cotton fabrics, and has the advantages of high productivity, low energy consumption, environmental protection, good color fastness, bright flower type and color, soft hand feeling, strong stereoscopic impression and the like.
Description
Technical Field
The application relates to indigo pulp and a preparation method thereof, belonging to the technical field of dyeing or printing of fabrics.
Background
The plant dye indigo is prepared by binding the fabric to be dyed in the conventional manual dyeing process, and soaking the bound fabric in a dyeing tank containing indigo dye and a reducing agent (mainly comprising plant ash which can be melted by hot water) for more than 30-60 minutes. The whole dyeing process is too complicated, the process requirements can be met only by repeated dip-dyeing, the labor hour and the discharge amount of printing and dyeing wastewater are large, the improvement of the productivity is severely restricted, the comprehensive popularization and application are difficult, and the living demands of consumers cannot be met.
Disclosure of Invention
In view of this, the application firstly provides an indigo paste, and the indigo paste is applied to dyeing of all-cotton fabrics, is time-saving and labor-saving, is rapid and efficient, can be directly applied to the existing pad dyeing equipment and flat screen and rotary screen printing devices, and has the characteristics of rapid and comprehensive popularization and application, comprehensive improvement of productivity, effective reduction of printing and dyeing wastewater discharge and the like.
Specifically, the method is realized through the following scheme:
the indigo pulp consists of natural rubber modified resin, sodium alginate, gelatin, corn starch, indigo dye and purified water, wherein the natural rubber modified resin is aqueous resin formed by emulsifying natural rubber (sold in the market) and Arabic gum.
In the scheme, the aqueous natural rubber modified resin formed by emulsifying and modifying natural rubber and Arabic gum is used as the adhesive and forms the main component of the whole indigo blue pulp, so that the environment-friendly effect is realized, the adhesive fastness is effectively enhanced, and the method is characterized in that in the dip dyeing process, multiple dip dyeing and oxidation reduction are not needed, the whole process is simplified from the traditional three processes of pulping → noodle material bundling → dip dyeing → baking → dip dyeing → baking (more than three times) → finished product to the process of only pulping → padding or printing → baking → finished product, the productivity is improved by more than 300%, the labor is reduced, and more than 80% of printing and dyeing water is effectively reduced, the one-time qualification rate of the product reaches more than 95%, and the production requirements and development trends of green printing and low-carbon emission are met.
On the basis of the scheme, the proportion of each specific component is researched, and the preferable component proportion is obtained as follows (the proportion is 100 percent in 100 g):
more preferably, the indigo pulp has the following component proportions (100 g, the sum of proportions is 100%):
the product printed by the process has dry and wet rubbing fastness reaching more than three levels, all the adopted materials are all ecological green materials, the raw materials and the finished product of the product do not contain heavy metals and 24 chemical substances harmful to human bodies, and all groups of the product meet the environmental protection requirement of the textiles of national teams, and the product can be widely applied to artware, clothes, decorative materials, home textile products and the like.
In the indigo pulp scheme of the proportion, fresh natural rubber which is used immediately can be adopted to replace natural rubber modified resin, the fresh natural rubber is water-based when initially adopted, and becomes oily when stored, so that under the condition of permission, the fresh natural rubber which is adopted at present is directly used as one of raw materials and is compounded with sodium alginate, gelatin, corn starch, indigo dye and purified water in proportion, and the indigo pulp with the performance effect equivalent to that of the natural rubber modified resin can be obtained. In this case, the preferred proportions of the components are as follows (100% in 100 g):
more preferably, the indigo pulp has the following component proportions (100 g, the sum of proportions is 100%):
the preparation method of the indigo pulp formed by compounding the natural rubber modified resin comprises the following steps: (1) mixing sodium alginate and corn starch, adding purified water, and stirring; (2) adding gelatin and natural rubber modified resin, stirring, adding indigo dye, and mixing; (3) adjusting the color concentration to obtain the finished product indigo blue slurry.
In the preparation process, the natural rubber modified resin is used as a binder, the preparation method of the indigo pulp is changed, and modern dyeing and finishing equipment is utilized, so that the production capacity is greatly improved, and the energy consumption and the discharge of printing and dyeing wastewater are greatly reduced.
Aiming at the technical scheme, the applicant further optimizes and sets the scheme as follows:
in the step (1), the stirring speed is 800-.
In the step (2), the stirring speed is 500-.
And (3) performing vacuum filtration before adjusting the color concentration.
The preparation method of the indigo pulp formed by compounding fresh and currently-adopted natural rubber comprises the following steps: (1) mixing sodium alginate and corn starch, adding purified water, and stirring; (2) adding gelatin and natural rubber modified resin, stirring, adding indigo dye, and mixing; (3) adjusting the color concentration to obtain the finished product indigo blue slurry.
In the preparation process, fresh natural rubber is used as a binder, the water-based property of the natural rubber during initial collection is utilized, the preparation method of the indigo pulp is changed, and modern dyeing and finishing equipment is utilized, so that the production capacity is greatly improved, and the energy consumption and the discharge of printing and dyeing wastewater are greatly reduced.
Aiming at the technical scheme, the applicant further optimizes and sets the scheme as follows:
in the step (1), the stirring speed is 800-.
In the step (2), the stirring speed is 500-.
And (3) performing vacuum filtration before adjusting the color concentration.
The processes show that the traditional pulping and dip dyeing process can achieve the purpose of dyeing only by adding a reducing agent and performing oxidation-reduction by illumination, and the requirement can be met only by repeatedly carrying out dip dyeing for many times due to the lower dyeing rate, so that the process is time-consuming and labor-consuming, and the productivity and the one-time qualification rate of products cannot be improved. In the indigo pulp provided by the application, the fresh natural rubber/natural rubber modified resin is added as the binder, so that the preparation method of the indigo pulp is changed, and modern dyeing and finishing equipment is utilized, so that the production capacity is greatly improved, and the energy consumption and the discharge of printing and dyeing wastewater can be greatly reduced when the indigo pulp is applied to a dyeing or printing process.
In summary, the beneficial effects of the present application are analyzed as follows:
1) the application adopts the natural rubber modified resin which is independently researched and developed by the company as the binder and is used as the main raw material of the indigo pulp, thereby changing the backward process of needing multiple times of dip dyeing and oxidation reduction in the traditional dip dyeing process, greatly improving the productivity, reducing the discharge of manual and printing and dyeing wastewater, and completely meeting the production requirements and development trends of national green printing and dyeing and low-carbon discharge.
2) The indigo paste that this application provided for all cotton fabric dyeing and stamp, can make full use of present domestic current dyeing and finishing equipment, pad dyeing and plain net, the direct stamp of mould are compared in traditional process flow, can practice thrift printing and dyeing water more than 80%, promote the productivity more than 300%, the disposable qualification rate of product reaches more than ninety five per cent, can do meticulous printed pattern moreover, and the color is gorgeous, soft handle, advantages such as third dimension is strong. The dry friction and wet friction fastness levels of the product printed by the new process are both more than three levels through detection. And because the raw materials and the finished products of the product do not contain heavy metal and 24 chemical substances harmful to human bodies, the environment-friendly textile fabric completely meets the national environment-friendly requirement on textiles, and can be widely applied to artware, clothes, decoration materials and home textile products.
3) The preparation method and the application process of the indigo paste are simple, dyeing and printing can be carried out by utilizing the existing pad dyeing equipment and flat screen and rotary screen printing equipment of dyeing and finishing enterprises, the productivity can be greatly improved, and single-color and multi-color register direct printing can be carried out by utilizing the modern color separation plate making technology. Compared with the traditional dyeing method, the method is time-saving, labor-saving, rapid and efficient. The method can be rapidly and comprehensively popularized and applied, comprehensively improves the productivity and effectively reduces the discharge of printing and dyeing wastewater.
Detailed Description
The indigo pulp comprises natural rubber modified resin (fresh natural rubber can obtain the same effect, and the details are not described below), sodium alginate, gelatin, corn starch, indigo dye and purified water.
The preparation process of the components comprises the following steps:
A. firstly mixing sodium alginate and corn starch, adding purified water with a certain proportion, stirring for 15 minutes at a high speed of 1000 revolutions per minute by a high-speed dispersion machine, then adding gelatin and natural rubber modified resin, and then adding indigo dye at a speed of 5 minutes of 800 revolutions per minute and 1000 revolutions per minute for fully mixing.
B. And (4) carrying out vacuum filtration on the mixed indigo pulp, and then adjusting the color concentration according to the production requirement.
C. And (3) directly carrying out pad dyeing and drying on the prepared indigo blue pulp on a pad dyeing machine.
D. And (3) directly printing the prepared indigo blue slurry on a flat screen or a circular screen printing machine, and drying.
By adopting the scheme, indigo pulp with different proportions can be prepared, and the specific reference is shown in table 1.
TABLE 1 indigo pastes of different compositions (% in units per 100g indigo paste)
The natural rubber modified resin comprises the following components: mixing natural rubber and Arabic gum, emulsifying, and modifying natural rubber from oily resin into water-based resin.
The sodium alginate is sold under the trade name of seaweed powder; the gelatin can be industrial gelatin or edible gelatin; sodium alginate, gelatin, indigo dye and corn starch are all commercial finished products, and in the case, the components are all from a Shangxing Tianji printing material factory.
All the raw materials are environment-friendly qualified products meeting the national green and environment-friendly standards.
Table 1 provides indigo pulps of 24 compositions, which we tested for stability, quality uniformity after formulation, and the results show that: when the natural rubber modified resin (or fresh natural rubber) is 20-40%, the sodium alginate is 5-15%, the gelatin is 5-18%, the corn starch is 5-20%, the indigo dye is 1-12%, and the purified water is 30-40%, the indigo pulp with stable quality and uniform performance can be prepared, and particularly, the components are controlled as follows: 28-32% of natural rubber modified resin (or fresh natural rubber), 8-12% of sodium alginate, 8-12% of gelatin, 8-15% of corn starch, 3-8% of indigo dye and 32-37% of purified water, and the storage effect and the use effect are optimal.
The indigo pulps presented in table 1 were subjected to performance tests, see in particular table 2.
Table 2 use control of harmful substances in indigo pulp
As can be seen from the formula in the table 1, because the raw materials and the finished products of the product are all ecological green raw materials, the raw materials and the finished products of the product do not contain heavy metal and 24 chemical substances harmful to human bodies, the production process has no pollution to the atmosphere and water quality, no odor and harmful substance emission, completely meets the national environmental protection requirements on textiles, and can be widely applied to artware, clothes, decoration materials and home textile products.
The indigo pulp provided in the table 1 is used for dyeing the all-cotton fabric, and the conventional dyeing process comprises the following steps: pulping → baling of the surface material → dip dyeing → baking → finished product; the process flow of the application is as follows: pulping → pad dyeing or printing → baking → finished product, wherein the dip dyeing and the dyeing both involve the use of water, the same amount of all-cotton fabric with the same specification is dyed, and the dyeing cost and the dyeing effect of the two paths are compared, which is shown in table 3 (detection standard: GB 18401-.
TABLE 3 indigo pulp dyeing cost comparison table of the present application
As can be seen from table 3, since the conventional pulp-making dip dyeing process requires the addition of a reducing agent, the purpose of dyeing can be achieved by light oxidation-reduction, and since the dye uptake is low, the requirements can be met by repeated dip dyeing, which is time-consuming and labor-consuming, and the productivity and the one-time qualification rate of the product cannot be improved; due to the use of the indigo pulp, the dyeing process is reduced from at least eight conventional processes to three conventional processes, and the one-time qualified rate of the product reaches more than 95%; the dyeing is successful at one time, so that the repeated dip dyeing process and multiple baking are omitted, and the dyeing water can be saved by over 80%; the existing flat screen and circular screen equipment can be directly used for dyeing by the indigo blue pulp, so the equipment investment is very low; the labor is reduced from the original 8-9 persons/class to 3 persons/class, so that the labor cost is greatly reduced; the dyeing cycle of the fabric with the same specification can be shortened to 0.3-0.5 h/ton of cloth, and the productivity can be improved by more than 300%; the dry friction and wet friction fastness levels reach more than three levels through detection, fine printed patterns can be made, and the color is bright, the hand feeling is soft, the stereoscopic impression is strong, and the like.
Claims (4)
1. An indigo pulp, which is characterized in that: the natural rubber modified resin/fresh natural rubber comprises the following natural rubber modified resin/fresh natural rubber, sodium alginate, gelatin, corn starch, indigo dye and purified water in percentage by weight:
20-40% of natural rubber modified resin/fresh natural rubber;
5-15% of sodium alginate;
5-18% of gelatin;
5-20% of corn starch;
1-12% of indigo dye;
30 to 40 percent of purified water,
the fresh natural rubber is prepared from natural rubber, the natural rubber modified resin is water-based resin formed by emulsifying natural rubber and Arabic gum,
the proportioning of the indigo pulp comprises the following steps: (1) mixing sodium alginate and corn starch, adding purified water, and stirring at 800-; (2) adding gelatin, fresh natural rubber or prepared natural rubber modified resin, stirring, adding indigo dye, and mixing; (3) adjusting the color concentration to obtain the finished product indigo blue slurry.
2. The indigo paste according to claim 1, wherein the ratio of the natural rubber modified resin/fresh natural rubber, sodium alginate, gelatin, corn starch, indigo dye and purified water satisfies the following conditions:
28-32% of natural rubber modified resin/fresh natural rubber;
8-12% of sodium alginate;
8-12% of gelatin;
8-15% of corn starch;
3-8% of indigo dye;
32-37% of purified water.
3. An indigo pulp according to claim 1, characterized in that: in the step (2), the stirring speed is 500-.
4. An indigo pulp according to claim 1, characterized in that: and (3) performing vacuum filtration before adjusting the color concentration.
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| CN201910078556.5A CN109881502B (en) | 2019-01-28 | 2019-01-28 | Indigo pulp and preparation method thereof |
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| CN201910078556.5A CN109881502B (en) | 2019-01-28 | 2019-01-28 | Indigo pulp and preparation method thereof |
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| CN109881502B true CN109881502B (en) | 2021-09-10 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104005240A (en) * | 2014-05-21 | 2014-08-27 | 浙江理工大学 | White printing paste, preparation method and application of white printing paste |
| CN108166274A (en) * | 2018-01-11 | 2018-06-15 | 南通市联缘染业有限公司 | A kind of dyeing slurry |
| WO2018206390A1 (en) * | 2017-05-12 | 2018-11-15 | Brauns-Heitmann Gmbh & Co. Kg | Coloring product, in particular for dyeing or refreshing dyes in textile materials with indigo dyes |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104005240A (en) * | 2014-05-21 | 2014-08-27 | 浙江理工大学 | White printing paste, preparation method and application of white printing paste |
| WO2018206390A1 (en) * | 2017-05-12 | 2018-11-15 | Brauns-Heitmann Gmbh & Co. Kg | Coloring product, in particular for dyeing or refreshing dyes in textile materials with indigo dyes |
| CN108166274A (en) * | 2018-01-11 | 2018-06-15 | 南通市联缘染业有限公司 | A kind of dyeing slurry |
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