CN102995405A - Method for producing lattice noniron fabric - Google Patents

Abstract

The invention relates to a method for preparing net-dot non-ironing textiles, which belongs to the field of textile processing. The finishing liquid used for non-ironing finishing of dots is prepared by a finishing agent and a catalyst. After the finishing liquid is mixed with a thickener to make printing paste, the dots made of printing paste are printed on the upper surface of the fabric. After the fabric printed with printing paste is dried and baked, the finishing agent and the fiber undergo a cross-linking reaction, and then the baked and cross-linked fabric is subjected to soaping, washing, drying, etc., to complete the preparation of non-ironing textiles at outlets process. At this time, the finished fabric forms cross-linking at the printed dots, and the other parts of the fabric still maintain their original natural fiber components, so as to improve the non-ironing performance of the fabric while retaining the original fabric to the greatest extent. Excellent performance and style.

Description

A kind of method for preparing net-dot non-ironing textile

technical field

The invention relates to a method for preparing net-dot non-ironing textiles, which belongs to the technical field of textile processing.

Background technique

Cotton, hemp and other natural fibers are widely used in the textile industry, and their textile products are favored by consumers for their excellent properties such as softness, comfort, moisture absorption and vapor permeability, etc., but they are prone to wrinkling and shape retention during wearing and washing Problems such as poor performance are often solved through subsequent non-ironing finishing. Conventional non-ironing finishing is to immerse the entire fabric into the finishing liquid for treatment. The technical route is simple, but at this time the fabric absorbs a large amount of finishing agents, which increases the production cost, and the front and back sides have received the same treatment. Effect. When the fabric that has undergone such conventional non-ironing finishing is worn, the side that is in direct contact with the skin is treated with chemicals, which is no longer a real natural fiber fabric, destroying its original excellent performance and causing the fabric to become weak. Significant decline, hard hand feeling, poor moisture absorption and air permeability, etc., seriously affect the wearing performance and style of the fabric. In addition, a large amount of chemical agents contained on the surface of the fabric may cause harm to human health during the wearing process.

The low liquid supply technology used in dyeing and finishing production can solve the above problems to a certain extent. At present, the more common low liquid supply technologies mainly include foam technology, liquid removal technology, transfer technology, etc., but these technologies also exist in practical applications. presents a series of insurmountable problems. Foam technology is to evenly disperse chemicals in a small amount of liquid, form foam through the foaming action of air and foaming agent, and then apply the foam to the fabric to achieve the desired dyeing and finishing effect. Foam technology is a typical low liquid dyeing and finishing technology, which can be used for one-sided dyeing and finishing of fabrics. The biggest problem of foam dyeing and finishing processing technology lies in the stability of foam, processing uniformity and permeability to fabrics, etc., and there is no large-scale industrial application at present. Liquid removal technology is to make use of rollers, vacuum, air jet, liquid absorption and other functions to make the fabric have a small amount of working liquid. The application of the demanding process is limited, and the reduction of the liquid-carrying rate of the fabric has a certain limit. The transfer technology is to indirectly apply the treatment agent to the fabric by means of the transfer function of the transfer system. It is required that the pre-treatment of the fabric must be fully uniform, otherwise the dyeing and finishing effect of the fabric will be uneven.

Contents of the invention

In view of the above existing problems, the purpose of the present invention is to provide a method of directly printing the non-ironing finishing agent on the fabric to form dots, and then drying, baking, soaping, post-processing and finishing the fabric after printing the finishing agent. There is a cross-linking reaction between the agent and the fiber, and the part where the finishing pulp is not printed is still the original natural fiber component. In order to achieve the above purpose, the technical solution is:

A method for preparing outlet-dot non-ironing textiles, the specific steps of the preparation method are as follows:

a. The preparation of the printed screen adopts the printing plate-making process to make dots with the same shape and size on the screen and evenly arranged. The total area of the dots accounts for 35% to 65% of the total area of the screen;

b preparing a finishing solution, preparing a finishing solution with a finishing agent, a catalyst and water in a mass ratio of 2.5:1:16.5 to 46.5, wherein the finishing agent is a 2D resin, and the catalyst is taurine;

c Prepare the printing paste, add the thickener 701 into the finishing liquid prepared in step b, stir evenly to prepare the finishing printing paste, wherein the mass ratio of the thickening agent 701 to the finishing liquid is 1:20-50 ;

d To print the fabric, spread the fabric to be printed on the working table with lining cloth, put the screen on the upper surface of the fabric, add the prepared printing paste on the screen to print the fabric, and The upper surface of the fabric is printed with dots made of printing paste;

e drying the fabric, drying the fabric printed in step d at 80°C for 5 minutes;

f baking and crosslinking, baking the fabric dried in step e at 150-170°C for 0.5-1.5 minutes;

g soaping, to the fabric after step f baking cross-linking, soap powder consumption is 2g/L, bath ratio is 1: 50, soaping 10 minutes when 100 ℃;

h post-treatment, washing and drying the fabric after soaping in step g.

The textile is one of cotton fabric or hemp fabric.

Due to the adoption of the above technical scheme, the technical characteristics of the method for preparing non-ironing textiles with dots in the present invention are: the screen used for the non-ironing finishing of dots is plate-making using a printing plate-making process, and the shape and size are the same on the screen, and the distribution is even The total area of the dots accounts for 35-65% of the total area of the screen. The finishing liquid is prepared by 2D resin and taurine. The finishing liquid and the thickener are mixed evenly to make printing paste. According to the viscosity of the pulp, the finishing printing paste is printed on the surface of the fabric through a screen to form discrete dots. The position where the dots are printed contains a finishing agent, and other continuous parts of the fabric maintain the original fiber composition. When the viscosity of the printing paste is high, the finishing agent diffuses with the printing paste and the permeability is small, and only one side of the fabric is formed; when the viscosity of the printing paste decreases, the finishing agent will penetrate into the fabric to form a concentration gradient of the finishing agent , or the finishing agent penetrates both sides of the fabric to form penetrating dots. After printing and finishing the printing paste, the fabric is dried, baked, soaped, and post-treated to complete the cross-linking reaction between the finishing agent in the printing paste and the fiber to form a non-ironing textile with dots. At this time, other parts of the fabric still maintain their original color. The original natural fiber composition, so as to improve the non-ironing performance of the fabric, while retaining the original excellent performance of the fabric to the greatest extent.

Detailed ways

A method for preparing outlet-dot non-ironing textiles, the specific steps of the preparation method are as follows:

a. The preparation of the printed screen uses the printing plate-making process to make dots with the same shape and size and uniform arrangement on the screen. The total area of the dots on the screen accounts for 35-65% of the total area of the screen. One of round or square, when the shape of the uniform dot is circular, the diameter of the circle is 0.1-0.5cm, and the number of dots is about 4.5×10 ⁵ to 3.3×10 ⁴ /m ² ; when the uniform dot When the shape is a square, the side length of the square is 0.1-0.5 cm, and the number of dots is about 3.5×10 ⁵ to 2.6×10 ⁴ /m ² . The size, quantity and shape of the screen dots determine the shape of the printed dots and the size of the printing paste area. When there are fewer dots on the screen, and the ratio of the sum of the dot area to the total area of the screen is less than 35%, the amount of finishing printed on the fabric through the screen is less, and too few cross-linking points are formed, and the non-ironing performance of the fabric will be reduced. Poor; when there are many dots on the screen, and the ratio of the sum of the dot area to the total area of the screen is greater than 65%, the amount of finishing printed on the fabric through the screen is more, forming too much crosslinking on the fabric It has a great influence on the strength and feel of the fabric.

b Prepare a finishing liquid, prepare a finishing liquid by preparing a finishing agent, a catalyst and water at a mass ratio of 2.5:1:16.5-46.5, wherein the finishing agent is 2D resin, and the catalyst is taurine. 2D resin is an N-methylol non-iron finishing agent commonly used in industry. Under the action of a catalyst, it can cross-link with the hydroxyl groups on cellulose fibers such as cotton or hemp to form ether bonds and improve the non-iron finish of the fabric. Hot performance. Taurine is an amphoteric compound, which is acidic in water and can catalyze the cross-linking reaction between 2D resin and fiber. In addition, this amphoteric structure of taurine can maintain the stretching effect of thickener macromolecules in printing paste, and will not be caused by The action of charge makes the macromolecules aggregate, so that the viscosity of the printing paste can be kept in the printable range, so that the finishing agent can be printed smoothly on the fabric to be finished.

c Prepare the printing paste, add the thickener 701 into the finishing liquid prepared in step b, stir evenly to prepare the finishing printing paste, wherein the mass ratio of the thickening agent 701 to the finishing liquid is 1:20-50 . After the thickener is dissolved in water, due to the effect of electrostatic repulsion, its molecular chain stretches from the original coil shape to a rod shape, which increases the viscosity of the printing paste, and does not lose the accuracy of the dot due to seepage and other effects, thereby ensuring printing. The pulp forms uniform and stable dots on the surface of the fabric. According to the different textile materials, adjust the viscosity of the printing paste. When the mass ratio of the thickener 701 to the finishing liquid in the printing paste is 1:20-30, the viscosity of the printing paste is high, and the finishing agent diffuses and penetrates with the printing paste. Low resistance, cross-linking reaction with fibers only occurs on the surface of the fabric, resulting in one-sided non-ironing effect; when the mass ratio of thickener 701 to finishing liquid is 1:31-40, the finishing agent will penetrate into the fabric , the concentration gradient distribution of the finishing agent is formed inside the fabric, and at this time it is cross-linking with gradient network points; when the mass ratio of the thickener 701 to the finishing solution is 1:41-50, the finishing agent can penetrate through both sides of the fabric to form a penetrating network cross-linking.

d To print the fabric, lay the fabric to be printed flat on the worktable with lining cloth, place the screen flat on the upper surface of the fabric, pour the printing paste on the screen, and add the prepared The printing paste can be printed on the fabric. When printing, the magnetic bar or the scraper reciprocates twice on the screen, and the printing paste is squeezed through the holes of the screen to form discrete dots on the surface of the fabric. The printing dots contain finishing agents. Other continuous parts on the fabric keep the original fiber composition, which is equivalent to performing non-ironing finishing on local fibers on the fabric instead of non-ironing finishing on the whole fabric. The common characteristics of ironing fibers, while improving the non-ironing performance of the fabric, it also maintains the excellent moisture absorption and breathability of the fabric, soft feel and high strength.

e Dry the fabric, and dry the printed fabric of step d at 80°C for 5 minutes. Drying is to make the water in the printing paste evaporate quickly under the action of heat, so as to prevent the printing paste printed on the fabric from seeping and causing dot loss during the long-term storage process.

f Bake and crosslink, bake the fabric dried in step e at 150-170° C. for 0.5-1.5 minutes. During high-temperature baking treatment, under the catalysis of the catalyst, the finishing agent contained in the printing paste forms ether bond covalent cross-linking with the hydroxyl groups on the cotton or hemp fiber macromolecules, forming a network of cross-links between the fiber macromolecular chains. The interconnected structure limits the deformation of macromolecular segments under external force, so that the fiber macromolecules can quickly return to the original initial state after the external force is removed, so that the fabric has good non-ironing performance.

g soaping, for the fabric after step f baking and crosslinking, the soap powder consumption is 2g/L, the bath ratio is 1:50, soaping for 10 minutes at 100°C. Sufficient and uniform soaping can remove residual pulp on the fabric and unreacted finishing agents and catalysts and other chemicals. The degree of soaping is closely related to the results of the finished fabric's dot clarity, non-ironing performance and hand feel.

h post-treatment, washing and drying the fabric after soaping in step g. Washing can further remove the remaining impurities on the fabric and improve the overall quality of the finished product. The washed fabric can be dried to obtain a non-ironing textile finished product.

specific embodiment

A method for preparing a non-ironing textile with dots of the present invention will be further described in detail below in conjunction with specific examples.

Embodiment one

According to the above process steps: prepare the printed screen, the total area of the dots on the screen accounts for 35% of the total area of the screen, the shape of the uniform dots on the screen is circular, the diameter of the circle is 0.1cm, and the number of dots is about 4.5× 10 ⁵ pieces/m ² , 2.5g of 2D resin, 1g of taurine and 16.5g of water were prepared as 20g of finishing solution, 1g of thickener 701 was added to it and stirred evenly to make finishing printing paste, and the prepared finishing printing paste Evenly print on one side of the flat and wrinkle-free cotton fabric, print single-sided dots made of printing paste on the cotton fabric, dry the printed cotton fabric at 80°C for 5 minutes, and bake at 150°C for 1.5 Minutes, then the amount of soap powder is 2g/L, the bath ratio is 1:50, and the soap is boiled for 10 minutes at 100°C, and finally washed with water and dried to obtain a dotted non-ironing cotton textile.

Embodiment two

According to the above process steps: prepare the printed screen, the total area of the dots on the screen accounts for 65% of the total area of the screen, the shape of the uniform dots on the screen is circular, the diameter of the circle is 0.5cm, and the number of dots is about 3.3× 10 ⁴ pieces/m ² , 2.5g of 2D resin, 1g of taurine and 46.5g of water were prepared to make 50g of finishing solution, 1g of thickener 701 was added to it and stirred evenly to make finishing printing paste, and the prepared finishing printing paste Evenly print on the flat and wrinkle-free side of the cotton fabric, print the through dots made of printing paste on the cotton fabric, dry the printed cotton fabric at 80°C for 5 minutes, and bake at 170°C for 0.5 minutes , and then the amount of soap powder is 2g/L, the bath ratio is 1:50, and the soap is boiled for 10 minutes at 100 ° C, and finally washed with water and dried to obtain the non-ironing cotton textile with dots.

Embodiment three

According to the above process steps: prepare the printed screen, the total area of the dots on the screen accounts for 50% of the total area of the screen, the shape of the uniform dots on the screen is a square, the side length of the square is 0.3cm, and the number of dots is about 5.6 × 10 ⁴ pcs/m ² , 2.5g of 2D resin, 1g of taurine and 31.5g of water were prepared to make 35g of finishing solution, and 1g of thickener 701 was added to it and stirred evenly to make finishing printing paste, and the prepared finishing printing paste was uniformly Print on the flat and wrinkle-free side of the cotton fabric, print gradient dots made of printing paste on the cotton fabric, dry the printed cotton fabric at 80°C for 5 minutes, and bake at 160°C for 1 minute, Then, the amount of soap powder is 2g/L, the bath ratio is 1:50, and the soap is boiled for 10 minutes at 100°C, and finally washed with water and dried to obtain the dotted non-ironing cotton textile.

Embodiment Four

According to the above process steps: prepare the printed screen, the total area of the dots on the screen accounts for 50% of the total area of the screen, the shape of the uniform dots on the screen is circular, the diameter of the circle is 0.3cm, and the number of dots is about 7.1× 10 ⁴ pieces/m ² , 2.5g of 2D resin, 1g of taurine and 31.5g of water were prepared into 35g of finishing solution, 1g of thickener 701 was added to it and stirred evenly to make finishing printing paste, and the prepared finishing printing paste Evenly print on the flat and wrinkle-free side of the linen fabric, print gradient dots made of printing paste on the linen fabric, dry the printed linen fabric at 80°C for 5 minutes, and bake at 160°C for 1 minute , and then the amount of soap powder is 2g/L, the bath ratio is 1:50, and the soap is boiled for 10 minutes at 100 ° C, and finally washed with water and dried to obtain the dotted no-press hemp textile.

Embodiment five

According to the above process steps: prepare the printed screen, the total area of the dots on the screen accounts for 35% of the total area of the screen, the shape of the uniform dots on the screen is a square, the side length of the square is 0.1cm, and the number of dots is about 3.5 × 10 ⁵ pieces/m ² , 2.5g of 2D resin, 1g of taurine and 16.5g of water were prepared to make 20g of finishing solution, and 1g of thickener 701 was added to it and stirred evenly to make finishing printing paste, and the prepared finishing printing paste was uniformly Print on one side of the flat and wrinkle-free linen fabric, print single-sided dots made of printing paste on the linen fabric, dry the printed linen fabric at 80°C for 5 minutes, and bake at 150°C for 1.5 minutes , and then the amount of soap powder is 2g/L, the bath ratio is 1:50, and the soap is boiled for 10 minutes at 100 ° C, and finally washed with water and dried to obtain the dotted no-press hemp textile.

Embodiment six

According to the above process steps: prepare the printed screen, the total area of the dots on the screen accounts for 65% of the total area of the screen, the shape of the uniform dots on the screen is a square, the side length of the square is 0.5cm, and the number of dots is about 2.6 × 10 ⁴ pcs/m ² , 2.5g of 2D resin, 1g of taurine and 46.5g of water were prepared to make 50g of finishing liquid, and 1g of thickener 701 was added to it and stirred evenly to make finishing printing paste, and the prepared finishing printing paste was uniformly Print on the flat and wrinkle-free side of the linen fabric, print the penetrating dots made of printing paste on the linen fabric, dry the printed linen fabric at 80°C for 5 minutes, and bake at 170°C for 0.5 minutes, Then, the amount of soap powder is 2g/L, the bath ratio is 1:50, and the soap is boiled for 10 minutes at 100°C, and finally washed with water and dried to obtain the dotted no-press hemp textile.

Claims (2)

1. method for preparing the site non-ironing textile, it is characterized in that: described preparation method's concrete steps are as follows:

A prints the preparation of screen cloth, adopts printing stencil technique, makes shape, big or small identical at screen cloth, site arranged in a uniform, and the area summation of site accounts for 35～65% of the screen cloth gross area;

B prepares dressing liquid, is that the preparation of 2.5: 1: 16.5～46.5 ratio becomes dressing liquid in mass ratio with finishing agent, catalyst and water, and wherein, described finishing agent is the 2D resin, and described catalyst is taurine;

C modulation seal slurry joins thickener 701 in the dressing liquid of step b preparation, and uniform stirring is modulated into arrangement seal slurry, and wherein, described thickener 701 is 1: 20～50 with the mass ratio of dressing liquid;

D prints fabric, and the fabric that need are printed is tiled on the working plate that is lined with lining cloth, screen cloth is lain in the upper surface of fabric, adds the seal slurry that modulates at screen cloth fabric is printed, and is printed to the site that is made of the seal slurry at the upper surface of fabric;

E is dried fabric, will dry 5 minutes under 80 ℃ through the fabric that steps d is printed;

F bakes crosslinked, and the fabric through step e oven dry is baked 0.5～1.5 minute under 150～170 ℃;

The g soap boiling to bake the fabric after crosslinked through step f, is 2g/L at the soap powder consumption, and bath raio is 1: 50, and soap boiling is 10 minutes in the time of 100 ℃;

The h post processing is washed, is dried the fabric behind the step g soap boiling.

2. a kind of method for preparing the site non-ironing textile as claimed in claim 1 is characterized in that: described textiles is a kind of in COTTON FABRIC or the linen.