A coating preparation for tussah silk and its preparation method and application

Abstract

The application discloses a coating preparation for gauze silk, a preparation method and application thereof, and raw materials of the coating preparation include 15.0-30.0% of natural mineral, 0.5-5.0% of green vitriol and 65.0-84.5% of water, wherein the natural mineral is montmorillonite and / or bentonite; the preparation is prepared by dispersing the natural mineral and the green vitriol in water under a first alkaline condition and a heating condition, then adjusting a pH value to a second alkaline condition, and generating the coating preparation in a colloidal state through reaction, wherein the pH value of the second alkaline condition is greater than or equal to the pH value of the first alkaline condition; and the coating preparation is applied to one surface of a gauze silk fabric to generate the gauze silk through reaction; the coating preparation can make the gauze silk have a black and bright coating, and also has the advantages of natural environmental protection, simple formula, no need of using a forming agent, and the like, and can realize coating on a surface of a fabric, especially high-temperature forming of the gauze silk, thereby greatly reducing production time consumption.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of textile processing, in particular to a coating preparation for rhubarb silk and a preparation method and application thereof. BACKGROUND

[0002] Rhubarb silk is a natural coated silk product with special fabric style and wearing comfort in China. It has double-face different colors (bright black on the front and red-brown on the back), soft and crisp hand feeling, good moisture permeability and air permeability, and high fabric color fastness. The processing technology of rhubarb silk is a national intangible cultural heritage, which is processed by using all-natural raw materials and manual technology: the silk fabric is first immersed in the dyeing solution of rhubarb and exposed to sunlight, and then the river mud is coated on the dark side of the fabric after sunning, and after sufficient reaction, the floating mud is washed off, forming a layer of black and bright natural coating on the surface of the fabric. Rhubarb silk can only be produced in a few areas, one of the main reasons is that the river mud required for processing the black coating of rhubarb silk is very special, its main components and properties are different from those of river mud in other areas. At present, due to the continuous development of industrialization, the mud that can be used for the production of rhubarb silk is decreasing, which threatens the sustainable production of rhubarb silk. This dependence on river mud resources and the complicated preparation method of rhubarb silk make it difficult to produce industrially. Therefore, it is urgent to develop a natural and effective coating preparation to meet the sustainable production of rhubarb silk.

[0003] At present, there are few reports on the preparation method of rhubarb silk coating, mainly including mud coating method (patent CN102733182B), surface chemical polymerization method (patent CN114892398A) and chemical product printing method. These methods either cannot get rid of the limitation of relying on river mud or use a large amount of chemical synthetic products, which changes the characteristics of rhubarb silk "pure natural", "healthy" and "environmental protection", and is difficult to be accepted by consumers.

[0004] Based on this, the patent CN116479662A discloses a kind of pure natural non-river mud pat silk coating preparation and pat silk coating industrial processing method, by following mass percentage component composition: humic acid 5.0%~16.0%, fulvic acid 2.0%~8.0%, alum 0.02%~0.2%, green vitriol 0.02%~0.2%, sodium phytate 0.5%~5.0%, starch 15.0%~25.0%, carrageenan 0.5%~5.0%, the rest is water.However, on the one hand, the formula is relatively complex, on the other hand, it needs to use a large amount of forming agent: starch and carrageenan, which makes it impossible to carry out at high temperature in the process of combining with fabric, starch and carrageenan may occur "curing" or deterioration and embed in fabric under high temperature conditions, which is not conducive to subsequent water washing to remove the substances that do not react with fabric, and since the coating formation process can only be carried out at relatively low temperature, the production process time is long, which is not conducive to industrial mass production.

[0005] It should be noted that the information disclosed in the above background section is only for understanding the background of the present application, therefore the background section of the present application can contain background information about the problems or environment of the present application, and is not necessarily a description of the prior art. Therefore, the content contained in the background section is not an admission by the applicant of prior art. SUMMARY

[0006] The purpose of the present application is to overcome one or more of the deficiencies in the prior art, to provide an improved preparation method of pat silk, which uses a specific coating preparation that not only makes the pat silk have a black and bright coating, but also is natural and environmentally friendly, and the formula is simple, without the need to use forming agent to achieve coating on the surface of fabric, especially suitable for high temperature forming of pat silk, greatly reducing the production time.

[0007] The present application also provides a preparation method of pat silk coating preparation for preparing pat silk and the pat silk coating preparation prepared thereby.

[0008] To achieve the above purpose, a technical solution adopted by the present application is:

[0009] A preparation method of pat silk, the preparation method comprising: applying a coating preparation to one surface of a dyed pat fabric, carrying out a first reaction to form a pat silk;

[0010] The raw materials of the coating preparation include, by mass percentage:

[0011] Natural mineral 15.0%~30.0%;

[0012] Green vitriol 0.5%~5.0%;

[0013] Water 65.0%~84.5%;

[0014] The natural mineral is montmorillonite and / or bentonite, which can react with the copperas to form colloidal substances.

[0015] According to some preferred aspects of the present application, the natural mineral is montmorillonite.

[0016] Montmorillonite (English name montmorillonite) is also known as gelignite, a natural mineral of silicate, which is the main mineral component of bentonite. It contains Al2O3, MgO, SiO2. The structural formula is (Al, Mg)2(SiO 10 )(OH)2•nH2O. Monoclinic crystal system, multiple site microcrystalline, aggregate in soil, spherulitic and so on. White with light gray, light yellow, light green, light blue when containing impurities, soil luster or no luster, slippery. After adding water, its volume can be expanded several times, and become paste, with strong adsorption capacity and cation exchange performance. Montmorillonite is a kind of nanometer thick surface negative charged silicate sheet, which is stacked together by electrostatic interaction between layers to form a soil-like mineral. The unit cell in its crystal structure is composed of two layers of silicon oxygen tetrahedron sandwiching one layer of aluminum oxygen octahedron, with unique one-dimensional layered nanostructure and cation exchange property.

[0017] Bentonite is a non-metallic mineral product with montmorillonite as the main mineral component. Generally, the content is 85-90%.

[0018] According to some preferred aspects of the present application, the mass ratio of the natural mineral to the copperas is 5-25:1.

[0019] According to the present application, the coating preparation is in colloidal state.

[0020] According to some preferred aspects of the present application, the preparation method of the coating preparation comprises:

[0021] Under the first alkaline condition and heating condition, the natural mineral and the copperas are dispersed in water, and then the pH value is adjusted to the second alkaline condition, and the second reaction is carried out to generate the coating preparation in colloidal state;

[0022] Among them, the pH value of the second alkaline condition is greater than or equal to the pH value of the first alkaline condition.

[0023] According to some preferred aspects of the present application, the heating condition is controlled to make the system temperature be 50-95℃, which is both the temperature for dispersing the natural mineral and the copperas and the reaction temperature for the second reaction, which is beneficial to the rapid dispersion and reaction of the natural mineral and the copperas.

[0024] According to some preferred and specific aspects of the present application, the pH value of the first alkaline condition is controlled to be 7.01-9.0.

[0025] According to some preferred and specific aspects of the present application, the pH value of the second alkaline condition is controlled to be 9.0-12.0.

[0026] In some embodiments of the present application, the pH value of the system can be regulated by adding a basic reagent or an aqueous solution thereof to achieve the first alkaline condition or the second alkaline condition. Further, a basic hydroxide or an aqueous solution thereof can be added, for example, sodium hydroxide or potassium hydroxide or an aqueous solution thereof.

[0027] In some embodiments of the present application, the reaction time of the second reaction is controlled to be 1-12 h.

[0028] In some embodiments of the present application, the coating preparation is applied to one surface of the dyed silk fabric by coating. Further, in some embodiments of the present application, the coating method includes doctor blade coating, roller coating, ultrasonic spraying, and slot coating, etc.

[0029] Further, in some preferred and specific embodiments of the present application, the coating preparation is uniformly coated on the front surface (usually the dark side, the exposed side) of the dyed silk fabric by using a doctor blade coater.

[0030] Further, in some preferred and specific embodiments of the present application, the first reaction is controlled to be carried out under the steaming treatment condition.

[0031] According to some preferred aspects of the present application, the steaming temperature of the steaming treatment condition is 100-110℃, and the coating preparation of the present application can not only be prepared at this high temperature, but also can be quickly prepared, which greatly reduces the production time.

[0032] According to the present application, the steaming treatment time of the steaming treatment condition is greater than or equal to 2 min, and further, the steaming treatment time of the steaming treatment condition is 2-20 min. In some embodiments of the present application, the steaming treatment time of the steaming treatment condition can be basically completed within 10 min, and even can be shortened to 2-3 min, which greatly improves the production efficiency and is beneficial to the industrial application.

[0033] In some embodiments of the present application, after the second reaction is carried out, centrifugal separation is performed, and the coating preparation in a colloidal state can be obtained.

[0034] According to some preferred and specific aspects of the present application, the embodiments for preparing the Qipaosilk include:

[0035] The coating preparation is prepared in a colloidal state;

[0036] The coating preparation is applied to the front of the bleached fabric, and then steaming treatment is performed, and then water washing is performed (the purpose of water washing is basically to remove excess coating preparation, i.e., unreacted coating preparation).

[0037] Further, in the present application, since no forming agent is added, only a small amount of unreacted impurities and a small amount of raw materials of the preparation need to be removed in the water washing process.

[0038] The present application provides another technical solution: a coating preparation for gauze silk, the raw materials of the coating preparation include, in mass percentage:

[0039] Natural mineral 15.0%~30.0%;

[0040] Green vitriol 0.5%~5.0%;

[0041] Water 65.0%~84.5%;

[0042] The natural mineral is montmorillonite and / or bentonite, and the montmorillonite and / or bentonite can react with the green vitriol to form colloidal substances.

[0043] In the present application, the coating preparation is prepared by using natural mineral, the raw material is pure natural, and the essential defect of the “imitation product” processed by a large amount of chemical synthetic products in the industry is overcome; meanwhile, the chemical reaction property of the coating preparation is similar to that of natural river mud, the gauze silk coating obtained by processing is black and bright, and the fabric style and performance are similar to those of the gauze silk product processed by traditional river mud, in addition, the coating preparation is cheap, and more importantly, it is not limited to river mud, and the regional and resource limitations of gauze silk production are overcome.

[0044] The present application provides another technical solution: a preparation method of a coating preparation for gauze silk, the raw materials of the coating preparation include, in mass percentage:

[0045] Natural mineral 15.0%~30.0%;

[0046] Green vitriol 0.5%~5.0%;

[0047] Water 65.0%~84.5%;

[0048] The natural mineral is montmorillonite and / or bentonite;

[0049] The preparation method of the coating preparation includes:

[0050] dispersing the natural mineral and the copperas in water under a first alkaline condition and a heating condition, and then adjusting the pH value to a second alkaline condition to perform a second reaction to generate the coating preparation in a colloidal state;

[0051] wherein the pH value of the second alkaline condition is greater than or equal to the pH value of the first alkaline condition.

[0052] The application further provides a coating preparation of the gauze silk prepared by the preparation method.

[0053] Thanks to the above technical scheme, the application has the following advantages compared with the prior art:

[0054] The application is based on the defects in the prior art, such as over-reliance on river mud resources in specific regions, non-natural environmental protection, complex coating preparation and long production time, etc. in the process of preparing gauze silk. In a large number of practical researches, it is accidentally found that when montmorillonite or bentonite mainly composed of montmorillonite is combined with copperas, (1) not only can colloidal substances be generated, but also the colloidal substances still have good rheological properties and adhesion under the premise of no forming agent, and thus can be well coated on the surface of the fabric, which is conducive to solidification and film formation. Especially, the omission of the forming agent also enables the later shaping of the fabric to be carried out at a relatively high temperature, avoiding the situation that the forming agent in the prior art may be "cured" or deteriorated and embedded in the fabric under high temperature conditions, which is not conducive to the subsequent removal of substances that have not reacted with the fabric, thereby greatly improving the production efficiency, and the fabric coating formation time can even be shortened to 2-3 minutes, which is conducive to industrial application; (2) the prepared gauze silk has the traditional gauze silk double-sided different colors, black and bright coating style and high color fastness under the condition of a simple formula.

[0055] After further mechanism analysis and research, it is believed that the specific structure of montmorillonite, such as two basic structural units consisting of silicon-oxygen tetrahedron and aluminum-oxygen octahedron, the unit cell in the crystal structure being composed of two layers of silicon-oxygen tetrahedron sandwiching one layer of aluminum-oxygen octahedron, the unique one-dimensional layered nanostructure and cation exchange property, and the surface negative electric silicate layer of montmorillonite, make montmorillonite have extraordinary adsorption effect on ferrous ions in copperas and the ability of cation exchange, so that the montmorillonite is combined by ferrous ions to form larger clay particles, and the colloidal properties with excellent rheological properties and adhesion are formed. Meanwhile, the ferrous ions in the colloid act as a "bridge" to complex with the dioscorea esculenta pigment on the fabric, and thus the coating preparation is firmly fixed on the gauze fabric to form a film, greatly improving the coating fastness. BRIEF DESCRIPTION OF DRAWINGS

[0056] Figure 1Physical picture and scanning electron microscope picture of the fabric before processing (i.e. the fabric after sun bleaching) of the present application;

[0057] Figure 2 Physical picture and scanning electron microscope picture of the fabric processed in Example 1 of the present application;

[0058] Figure 3 Physical picture and scanning electron microscope picture of the fabric processed in Example 3 of the present application;

[0059] Figure 4 Physical picture and scanning electron microscope picture of the fabric processed in Comparative Example 1 of the present application;

[0060] Figure 5 Physical picture and scanning electron microscope picture of the fabric processed in Comparative Example 2 of the present application;

[0061] Figure 6 Physical picture and scanning electron microscope picture of the fabric processed in Comparative Example 3 of the present application;

[0062] Figure 7 Physical picture and scanning electron microscope picture of the fabric processed in Comparative Example 4 of the present application;

[0063] Figure 8 Physical picture and scanning electron microscope picture of the fabric processed in Comparative Example 5 of the present application;

[0064] Figure 9 Physical picture and scanning electron microscope picture of the fabric processed in Comparative Example 6 of the present application;

[0065] Figure 10 Physical picture and scanning electron microscope picture of the fabric processed in Comparative Example 7 of the present application;

[0066] Figure 11 Physical picture and scanning electron microscope picture of the fabric processed in Comparative Example 8 of the present application;

[0067] The above Figures 1 to 11 In the above, the physical picture is the left picture in each figure, and the scanning electron microscope picture is the right picture in each figure. DETAILED DESCRIPTION

[0068] The above solutions will be further described in connection with specific examples. It should be understood that the examples are used to explain the basic principles, main features and advantages of the present application, and the present application is not limited in scope by the examples. The implementation conditions used in the examples can be further adjusted according to specific requirements, and the implementation conditions not mentioned are usually the conditions in conventional experiments.

[0069] All raw materials used in the following examples are commercially available or prepared by conventional methods in the art, unless otherwise specified.

[0070] The same bleached fabric was used in the following cases, and the color value, i.e. K / S value, of the fabric was 6.12.

[0071] In the following examples, the coating amount of the coating formulation on the bleached fabric was the same.

[0072] Montmorillonite was purchased from Shanghai Aldrin Reagent Co., Ltd. with the trade name MFCD00132796; copperas was purchased from Shanghai Aldrin Reagent Co., Ltd. with the trade name MFCD00149719; bentonite was purchased from Shanghai Aldrin Reagent Co., Ltd. with the trade name MFCD00130611; kaolin was purchased from Shanghai Aldrin Reagent Co., Ltd. with the trade name MFCD00062311; and attapulgite was purchased from Guangdong Wengjiang Chemical Reagent Co., Ltd. with the trade name PA97668.

[0073] Example 1:

[0074] The raw materials for preparing the coating formulation of lotus-silk were prepared, and the ingredients and composition of the raw materials, in terms of mass percentage, included:

[0075] Montmorillonite 22.5%

[0076] Copperas 1.5%

[0077] The balance was water

[0078] The above proportions were all percentages.

[0079] The above mineral components were dissolved at a pH value of 8.2 (adjusted by using 1 mol / L sodium hydroxide aqueous solution), at a temperature of 80°C, and stirred uniformly, and then reacted at a pH value of 10.5 (adjusted by using 1 mol / L sodium hydroxide aqueous solution), at a temperature of 80°C, for 3 h, and centrifuged at 3000 rpm, to obtain colloidal substances, i.e. the coating formulation of lotus-silk.

[0080] The coating formulation was coated on the front side of the bleached fabric using a doctor blade coater, and then steamed at 105°C for 10 min using a steamer, and then washed with water to remove the excess coating formulation (i.e. the formulation that did not react), to obtain the lotus-silk product.

[0081] The results were analyzed as follows:

[0082] As shown in Figure 1 , the color of both sides of the fabric before processing was brown, and the electron microscope image showed that the surface of the fabric was deposited with dioscorea esculenta pigment substances. The actual image and electron microscope image of the fabric after processing, i.e. the lotus-silk, are shown in Figure 2The coated surface became black and shiny, and the black coating completely covered the original red-brown color of the fabric, and the color was uniform. According to the conventional spectrophotometric colorimeter, the color depth K / S value of the coating surface was as high as 12.83. The reverse side of the fabric was still brown in color. It can be seen from the scanning electron microscope picture that the surface of the processed fabric presents a continuous, uniform and relatively thick coating material, and the coating thickness reaches 0.155 mm. According to the hand feeling and visual observation of the Foshan Shunde Qiangsha Silk Dyeing and Finishing Technology District-level inheritor, the appearance and touch style of the obtained Qiangsha silk are obtained. According to GB / T12490-2007 "Textile color fastness test for color fastness to domestic and commercial washing", the washing color fastness of the fabric coating reaches level 4, and the washing color fastness is excellent.

[0083] Example 2:

[0084] The raw materials for preparing the Qiangsha silk coating preparation are prepared, and the components and compositions thereof include, in mass percentage:

[0085] Montmorillonite 15.5%

[0086] Green vitriol 0.75%

[0087] The balance is water

[0088] The above proportions are all percentages.

[0089] The above mineral components are dissolved at a pH value of 7.3 (adjusted by 1 mol / L sodium hydroxide aqueous solution), a temperature of 55°C, and then stirred uniformly. Then, the reaction is carried out at a pH value of 11.7 (adjusted by 1 mol / L sodium hydroxide aqueous solution), a temperature of 92°C, for 1.5 h, and centrifuged at 3000 rpm to obtain colloidal material, which is the Qiangsha silk coating preparation.

[0090] The coating preparation is coated on the front side of the Qiangsha fabric after exposure by using a doctor blade coater, steamed at a temperature of 100°C for 18 min, and then washed with water to remove excess preparation to obtain Qiangsha silk products.

[0091] The results are analyzed as follows:

[0092] The coated surface of the processed fabric is black and shiny, and the color depth K / S value is as high as 12.20. The black coating completely covers the original red-brown color of the fabric, which shows obvious coating, and the color and coating are uniform, and the coating thickness reaches 0.159 mm. The reverse side of the fabric is still brown. According to the hand feeling and visual observation of the Foshan Shunde Qiangsha Silk Dyeing and Finishing Technology District-level inheritor, the appearance and touch style of the obtained Qiangsha silk are obtained. According to GB / T12490-2007 "Textile color fastness test for color fastness to domestic and commercial washing", the washing color fastness of the fabric coating reaches level 4, and the washing color fastness is excellent.

[0093] Example 3

[0094] The raw materials for preparing the coating preparation of the Qiangsashui were prepared, and the ingredients and composition included, in mass percentage:

[0095] Montmorillonite 28.5%

[0096] Green vitriol 4.5%

[0097] The balance was water

[0098] The above proportions were percentages.

[0099] The above mineral components were dissolved at pH 8.8 (pH adjusted by 1 mol / L sodium hydroxide aqueous solution), temperature 93°C, stirred uniformly, then reacted at pH 9.5 (pH adjusted by 1 mol / L sodium hydroxide aqueous solution), temperature 55°C for 11.5 h, centrifuged at 3000 rpm, to obtain colloidal material, which was the coating preparation of Qiangsashui.

[0100] The coating preparation was coated on the front of the bleached Qiangsashui fabric by using a doctor blade coater, steamed at temperature 102°C for 3 min, then washed to remove excess preparation, to obtain the Qiangsashui product.

[0101] The results were analyzed as follows:

[0102] The actual picture and scanning electron microscope picture of the processed fabric were as shown in Figure 3 Compared with before processing, the coated surface of the fabric became black and bright, the color depth K / S value of the processed fabric was 12.45. The color and coating were uniform, and the coating thickness reached 0.148 mm. The back was still brown. From the scanning electron microscope picture, it could be seen that the coating on the surface of the fabric was smooth and continuous, and completely covered on the fibers. According to the hand feeling and visual observation by the Foshan Shunde Qiangsashui Dyeing and Finishing Craft District Level Successor, it was considered that the fabric had a typical appearance and touch style of Qiangsashui. According to GB / T 12490-2007 Textiles Color Fastness Test Color Fastness to Home and Commercial Laundering, the washing color fastness of the coating of the fabric reached level 4, and the washing color fastness was excellent.

[0103] Example 4

[0104] The raw materials for preparing the coating preparation of the Qiangsashui were prepared, and the ingredients and composition included, in mass percentage:

[0105] Bentonite 25%

[0106] Green vitriol 2.0%

[0107] The balance was water

[0108] The above proportions were percentages.

[0109] The above mineral components are dissolved at pH 8.5 (pH value is adjusted by 1 mol / L aqueous sodium hydroxide solution), 85°C, stirred uniformly, then reacted at pH 10.8 (pH value is adjusted by 1 mol / L aqueous sodium hydroxide solution), 75°C for 5h, centrifuged at 3000 rpm, to obtain colloidal material, which is the coating preparation of Qiangsai.

[0110] The coating preparation is coated on the front of the bleached Qiangsai fabric by using a doctor blade coater, steamed at 108°C for 8min, then washed with water to remove excess preparation, to obtain Qiangsai products.

[0111] The results are analyzed as follows:

[0112] The coated surface of the processed fabric is black and shiny. According to the conventional spectrophotometric color matching instrument, the color depth K / S value of the prepared fabric is as high as 11.73. The black coating completely covers the original red-brown color of the fabric, showing obvious coating, and the color and coating are uniform, with a coating thickness of 0.141mm. The back is still brown. According to the hand feeling and visual observation by the Foshan Shunde Qiangsai Dyeing and Finishing Craft District Level Inheritor, the appearance and touch style of the Qiangsai fabric are basically achieved. According to GB / T 12490-2007 Textiles Color Fastness Test Color Fastness to Home and Commercial Laundering, the wash fastness of the coating of the fabric reaches level 3-4, and the wash fastness is qualified.

[0113] Example 5:

[0114] The raw materials for preparing the Qiangsai coating preparation are prepared, and the components and compositions thereof include, in mass percentage:

[0115] Montmorillonite 12.5%

[0116] Bentonite 12.5%

[0117] Green vitriol 2.0%

[0118] The balance is water

[0119] The above proportions are percentages.

[0120] The above mineral components are dissolved at pH 8.5 (pH value is adjusted by 1 mol / L aqueous sodium hydroxide solution), 85°C, stirred uniformly, then reacted at pH 10.8 (pH value is adjusted by 1 mol / L aqueous sodium hydroxide solution), 75°C for 5h, centrifuged at 3000 rpm, to obtain colloidal material, which is the coating preparation of Qiangsai.

[0121] The coating formulation was applied to the front side of the bleached pongee fabric using a knife coater, and then steamed at 108°C for 8 minutes, and then washed to remove the excess formulation, to obtain the pongee silk product.

[0122] The results were analyzed as follows:

[0123] The coated surface of the processed fabric was black and shiny. According to the conventional spectrophotometric color matching instrument, the color depth K / S value of the prepared fabric was as high as 11.92. The black coating completely covered the original red-brown color of the fabric, which showed a clear coating, and the color and coating were uniform, and the coating thickness was 0.145 mm. The back side was still brown. According to the hand feeling and visual observation by the Foshan Shunde Pongee Dyeing and Finishing Craft District Level Inheritor, the appearance and touch style of the pongee silk were basically achieved. According to GB / T 12490-2007 Textiles Color Fastness Test Color Fastness to Home and Commercial Washing, the washing color fastness of the fabric coating reached 3-4 levels, and the washing color fastness was qualified.

[0124] Comparative Example 1:

[0125] The montmorillonite in Example 1 was replaced with the same mass fraction of kaolin, which is also a natural silicate. The rest was the same as Example 1.

[0126] The results were analyzed as follows:

[0127] The physical map and scanning electron microscope image of the processed fabric are shown in Figure 4 .

[0128] The color of the coated surface of the processed fabric was only slightly darkened, and was still brown, and the fabric K / S value was only 6.75. From the scanning electron microscope image Figure 4 , it can be seen that compared with the fabric before processing Figure 1 , the deposit on the coated surface is very small, and no complete continuous coating is formed. The fabric coating thickness is only 0.008 mm, and there is no coating feeling on the touch, and it completely does not have the fabric style of pongee silk. This shows that the combination of kaolin and green vitriol cannot deposit a film on the fabric surface, and cannot form a coating.

[0129] Comparative Example 2:

[0130] The montmorillonite in Example 1 was replaced with the same mass fraction of attapulgite, which is also a natural silicate. The rest was the same as Example 1.

[0131] The results were analyzed as follows:

[0132] The physical map and scanning electron microscope image of the processed fabric are shown in Figure 5 .

[0133] The color of the coated fabric after processing is obviously darkened, but still shows a weak brown color, and the K / S value of the fabric is 9.22. The fabric coating thickness is 0.097 mm, and the coating of the fabric is very thin, either from the scanning electron microscope or by touch. The fabric does not meet the requirements of the appearance and touch style of the charmeuse fabric. This shows that the amount of the combination of the attapulgite and green vitriol deposited on the fabric surface is small, and a qualified coating cannot be formed.

[0134] Comparative Example 3:

[0135] The amount of green vitriol in Example 1 is replaced by 0.17%, and the water content is adjusted, and the rest is the same as Example 1.

[0136] The results are analyzed as follows:

[0137] After the reaction, the amount of the colloidal material obtained by centrifugation is small, that is, the yield of the coating preparation is low.

[0138] The actual picture and scanning electron microscope picture of the fabric after processing are shown in Figure 6 The color and coating uniformity of the fabric are poor, that is, the appearance quality of the fabric is poor. The K / S value of the coated surface of the fabric prepared is only 10.45. The coating thickness is 0.124 mm. From the electron microscope, the deposition on the fabric surface is small. According to GB / T 12490-2007 "Textile Color Fastness Test Resistance to Household and Commercial Washing Color Fastness", the washing color fastness of the coating of the fabric is 2, and the washing color fastness is unqualified. The product prepared under this condition obviously does not meet the commercialization requirements.

[0139] Comparative Example 4:

[0140] The reaction pH value condition in the preparation of the coating preparation in Example 3 is replaced by pH 8.0, and the rest is the same as Example 3.

[0141] The results are analyzed as follows:

[0142] After the reaction, the amount of the colloidal material obtained by centrifugation is small, that is, the yield of the coating preparation is low.

[0143] The actual picture and scanning electron microscope picture of the fabric after processing are shown in Figure 7 The K / S value of the coated surface of the fabric prepared is 11.78, but the coating thickness is 0.127 mm. The fabric appearance is "only black and not bright", and the hand feeling is rough. The scanning electron microscope shows that the deposition on the fabric surface is in a granular shape, rather than a flat "film" shape. It is analyzed that this is due to the weak adsorption and ion exchange between the montmorillonite and the ferrous ion under the low pH condition, and finally only the ferrous ion is combined with the fabric, resulting in the fabric "only black and not bright", and the appearance quality of the fabric is poor, which does not meet the requirements of the commercialized product.

[0144] Comparative Example 5:

[0145] The reaction temperature in preparing the coating formulation in Example 2 was replaced by 45°C, and the rest was the same as Example 2.

[0146] The result analysis was as follows:

[0147] After the reaction, the amount of colloidal material obtained by centrifugation was less, that is, the yield of the coating formulation was low.

[0148] The actual picture and scanning electron microscope picture of the processed fabric were as shown in Figure 8 The color depth K / S value of the prepared fabric coating surface was only 10.93. The coating thickness was 0.102 mm. The color and coating of the fabric were uneven, the appearance quality of the fabric was poor, and it did not meet the commercial requirements. According to GB / T12490-2007 "Textile Color Fastness Test Color Fastness to Home and Commercial Washing", the washing color fastness of the fabric coating was 2-3 grade, and the washing color fastness was unqualified. The coating formulation prepared under this condition had poor performance and was not suitable for the preparation of tussah silk products.

[0149] Comparative Example 6:

[0150] The steam temperature in Example 3 was replaced by 88°C, and the rest was the same as Example 3.

[0151] The result analysis was as follows:

[0152] The actual picture and scanning electron microscope picture of the processed fabric were as shown in Figure 9 .

[0153] The color depth K / S value of the coating surface of the processed fabric was only 9.51. The black coating could not completely cover the original red-brown color of the fabric, and the color and coating of the fabric were uneven, the coating of the fabric was thin, and the thickness was only 0.113 mm, and the appearance quality of the fabric was poor. According to GB / T12490-2007 "Textile Color Fastness Test Color Fastness to Home and Commercial Washing", the washing color fastness of the fabric coating was 3 grade, and the washing color fastness was barely qualified. In summary, the tussah silk product did not meet the requirements of commercial products.

[0154] Comparative Example 7:

[0155] The steaming treatment time of the coating formulation after being coated on the tussah fabric in Example 3 was replaced by 1 min from 3 min. The rest was the same as Example 1.

[0156] The result analysis was as follows:

[0157] The actual picture and scanning electron microscope picture of the processed fabric were as shown in Figure 10 .

[0158] The prepared fabric coating surface has uneven coating and color, and the fabric coating is thin with a thickness of 0.118 mm. According to GB / T12490-2007 "Textile Color Fastness Test Color Fastness to Home and Commercial Washing", the washing color fastness of the fabric coating is 2-3 grade. The appearance quality and washing color fastness of the fabric cannot meet the product requirements. It is considered that this is caused by insufficient and uneven reaction of the coating preparation with the morinda officinalis.

[0159] Comparative Example 8

[0160] The montmorillonite in the raw material formula of the coating preparation in Example 3 is removed, i.e. the morinda officinalis treated fabric is treated with only 4.5% by mass of green vitriol, and the rest is the same as Example 3.

[0161] The results are analyzed as follows:

[0162] The actual fabric picture and scanning electron microscope picture of the processed fabric are shown in Figure 11

[0163] The prepared fabric coating surface is black, but the color is dark, and the reverse side of the fabric is also colored by ferrous ions, which is completely different from the double-sided color effect of morinda officinalis silk products. Microscopically, there are many sand-like substances deposited on the surface of the fabric, and there is no film-like substance. The fabric has a rough touch and no coating feeling, which does not meet the hand feeling and style of morinda officinalis silk. According to GB / T12490-2007 "Textile Color Fastness Test Color Fastness to Home and Commercial Washing", the washing color fastness of the fabric coating is 1-2 grade. The appearance quality and washing color fastness of the fabric cannot meet the product requirements. It is considered that this is caused by the fact that only ferrous ions are combined on the surface of the fabric, and no other minerals can be deposited into a film.

[0164] The above examples are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and to implement it, and it cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application should be covered within the protection scope of the present application.

[0165] The endpoints of the ranges and any values in this disclosure are not limited to the precise values stated. The ranges and values should be construed to be approximations that allow for significant variation. Various ranges of values that are stated in this disclosure as being preferred, desired, or advantageous, together with the statements concerning the values are intended to function as support for a claim pertaining to any value or range of values that is customarily or arbitrarily deemed equivalent to the preferred, desired or advantageous values. For values that are stated as being preferred, desired, or advantageous, the corresponding statement concerning the values is intended to function as support for a claim pertaining to any value or range of values that is customarily or arbitrarily deemed equivalent to the preferred, desired or advantageous values.​

Claims

1. A process for the preparation of gossypium, characterized in that, The preparation method comprises: applying a coating preparation to one surface of the dyed post-woven fabric, performing a first reaction to form the sate; The raw materials of the coating preparation include, in mass percentage: Natural mineral 15.0%-30.0%; Green vitriol 0.5%-5.0%; Water 65.0%-84.5%; The natural mineral is montmorillonite and / or bentonite, which can react with the green vitriol to form a colloidal substance; The preparation method of the coating preparation comprises: Dispersing the natural mineral and the green vitriol in water under a first alkaline condition and a heating condition, then adjusting the pH value to a second alkaline condition to perform a second reaction to generate the coating preparation in a colloidal state; The heating condition is controlled to make the system temperature be 50-95℃, the pH value of the second alkaline condition is greater than or equal to the pH value of the first alkaline condition, the pH value of the first alkaline condition is controlled to be 7.01-9.0, and the pH value of the second alkaline condition is controlled to be 9.0-12.

0. The first reaction is controlled to be performed under a steaming treatment condition, the steaming temperature of the steaming treatment condition is 100-110℃, and the steaming treatment time of the steaming treatment condition is greater than or equal to 2 min.

2. The process for making gossamer according to claim 1, wherein, The natural mineral is montmorillonite.

3. The process for making gossamer according to claim 1, wherein, The mass ratio of the natural mineral to the green vitriol is 5-25:

1.

4. The process for making gossamer according to claim 1, wherein, The coating preparation is in a colloidal state.

5. The process for making gossamer according to claim 1, wherein, The reaction time of the second reaction is controlled to be 1-12 h.

6. The process for making gossamer according to claim 1, wherein, The coating preparation is applied to one surface of the dyed post-woven fabric in a coating manner.

7. The process for making gossamer according to claim 6, wherein, The coating preparation is uniformly coated on the front surface of the dyed post-woven fabric by using a doctor blade coater.

8. The process for making gossamer according to claim 1, wherein, The steaming treatment time of the steaming treatment condition is 2-20 min.

9. The process for making gossamer according to claim 1, wherein, The method for preparing the sate comprises: Preparation of the coating preparation in a colloidal state; Coating the coating preparation on the front surface of the dyed post-woven fabric, then performing a steaming treatment, and then performing a water washing after the treatment.

10. A method of preparing a coating formulation for tussah silk, characterized by, The raw materials of the coating preparation include, in mass percentage: Natural mineral 15.0%-30.0%; Green vitriol 0.5%-5.0%; Water 65.0%-84.5%; The natural mineral is montmorillonite and / or bentonite; The preparation method of the coating preparation comprises: Dispersing the natural mineral and the green vitriol in water under a first alkaline condition and a heating condition, then adjusting the pH value to a second alkaline condition to perform a second reaction to generate the coating preparation in a colloidal state; The heating condition is controlled to make the system temperature be 50-95℃, the pH value of the second alkaline condition is greater than or equal to the pH value of the first alkaline condition, the pH value of the first alkaline condition is controlled to be 7.01-9.0, and the pH value of the second alkaline condition is controlled to be 9.0-12.

0.

11. A sate coating preparation prepared by the preparation method in claim 10.

Images