CN111041865A - Production process of breathable printed fabric - Google Patents
Production process of breathable printed fabric Download PDFInfo
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- CN111041865A CN111041865A CN201911094499.6A CN201911094499A CN111041865A CN 111041865 A CN111041865 A CN 111041865A CN 201911094499 A CN201911094499 A CN 201911094499A CN 111041865 A CN111041865 A CN 111041865A
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
- D06P1/673—Inorganic compounds
- D06P1/67391—Salts or oxidising-compounds mixtures
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/12—Stencil printing; Silk-screen printing
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
- D06P1/46—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing natural macromolecular substances or derivatives thereof
- D06P1/48—Derivatives of carbohydrates
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
- D06P1/52—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing synthetic macromolecular substances
- D06P1/5207—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- D06P1/525—Polymers of unsaturated carboxylic acids or functional derivatives thereof
- D06P1/5257—(Meth)acrylic acid
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
- D06P1/673—Inorganic compounds
- D06P1/67333—Salts or hydroxides
- D06P1/6735—Salts or hydroxides of alkaline or alkaline-earth metals with anions different from those provided for in D06P1/67341
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
- D06P1/673—Inorganic compounds
- D06P1/67383—Inorganic compounds containing silicon
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Molecular Biology (AREA)
- Printing Methods (AREA)
Abstract
The invention discloses a production process of a breathable printed fabric, which adopts the technical scheme that the production process comprises the following steps: the method comprises the following steps: selecting a network; step two: stretching the net, coating net-sticking glue, loosening the net stretching machine after the net-sticking glue is completely dried, cutting off redundant net wires at the periphery of the net frame, and cleaning and drying; step three: coating photosensitive glue; step four: printing down; step five: fixing the screen plate on a printing machine, wherein the table top adopts a porous sieve plate table top or a table top with a plurality of slit openings; the bottom of the table top is provided with a blast device and a heating wire; step six: adding printing adhesive cement on the screen plate, extruding and scraping the adhesive cement through a scraper plate, and printing a product to be printed; after the scraping stroke of the scraper is finished, keeping the screen and the printed product still within preset time, and then separating the screen and the printed product; step seven: the tunnel oven is used for baking to completely solidify the printing adhesive cement, and the air-permeable effect of the clothes printing can be improved under the condition that the pattern coverage area is not reduced.
Description
Technical Field
The invention relates to the field of printing, in particular to a production process of a breathable printed fabric.
Background
The adhesive printing is a widely used printing process, and compared with water paste printing, the adhesive printing has the advantages of being suitable for materials with various color depths and having the characteristics of wide application range, rich colors, high reduction degree and the like. At present, the mucilage printing is mainly based on the printing of a silk-screen printing process, but the printed patterns obtained by the traditional mucilage printing process are not soft enough, the printing effect is blocky, the air permeability and moisture permeability effects are poor, and a wearer feels airtight. Therefore, in order to ensure the air permeability of the clothes, the existing printing process usually only prints small color block patterns or designs a large number of hollow structures in the fabric of the clothes so as to reduce the shielding area of the fabric by the printed patterns, which limits the application of the adhesive printing.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a production process of a breathable printed fabric, which can improve the breathable effect of clothes printing without reducing the pattern coverage area and enable a user to have more comfortable wearing feeling.
In order to achieve the purpose, the invention provides the following technical scheme: a production process of a breathable printed fabric comprises the following steps:
the method comprises the following steps: selecting a screen, wherein the thickness of the screen is 3-7 um;
step two: stretching the screen manually or mechanically, bonding the screen and the aluminum alloy screen frame together by coating screen bonding glue after the screen is stretched on the aluminum alloy screen frame, loosening the screen stretching machine after the screen bonding glue is completely dried to relieve the stretched state of the screen, cutting off redundant screen wires on the periphery of the screen frame, and washing and drying the screen by using a cleaning agent and clear water;
step three: coating a photosensitive adhesive, uniformly coating the photosensitive adhesive on a silk screen, wherein the thickness of the photosensitive adhesive on the surface which is in contact with the printing adhesive cement is 2-5% of the thickness of the silk screen, the thickness of the photosensitive adhesive on the surface which is not in contact with the printing adhesive cement is 0-5% of the thickness of the silk screen, and after coating, keeping the silk screen at 30-40 ℃ for drying;
printing a plate, namely, tightly attaching a film negative to a silk screen coated with photosensitive glue for exposure, wherein the distance between a lamp and the screen plate is 40-60 cm, and the exposure time is 5-7 min; wetting the exposed image by using normal-temperature water, and flushing the image by using a high-pressure water gun after 3-6 min until the image and text are clear;
step five: fixing the screen plate on a printing machine, wherein the surface of the screen plate, which is not contacted with printing mucilage, faces the table top of the printing machine, and setting the distance between the screen plate and the table top; the table top adopts a porous sieve plate table top or a table top with a plurality of slit openings; the bottom of the table top is provided with a blast device and a heating wire so as to output dry hot air to the table top;
step six: adding printing adhesive cement on the screen plate, extruding and scraping the adhesive cement through a scraper plate, and printing a product to be printed; after the scraping stroke of the scraper is finished, keeping the screen and the printed product still within preset time, wherein the preset time is set to be 1-5 s, and preliminarily curing the printing adhesive cement; then separating the screen plate and the printed product, wherein dry hot air is blown out from gaps among printing dots, and the printing adhesive cement is further cured;
step seven: and taking the printed product off the table board, and baking the printed product through a tunnel oven to completely cure the printing adhesive.
As a further improvement of the invention, in the first step, the mesh number of the silk screen is between 150 and 350.
In the second step, the angle between the longitude and latitude mesh wires of the mesh and the mesh frame is 30-40 degrees.
As a further improvement of the invention, in the fourth step, the direction of the high-pressure water flow is vertical to the screen plate.
In the seventh step, the temperature of the oven is set to be 100-150 ℃.
The printing adhesive cement comprises the following substances in parts by weight:
100-200 parts of carboxymethyl starch;
400-1200 parts of acrylic acid;
200-600 parts of modified acrylic acid oligomer;
1800-3600 parts of sodium hydroxide;
3-9 parts of persulfate;
1.2-3.6 parts of N, N' -methylene bisacrylamide;
2500-4500 parts of deionized water;
150-300 parts of titanium dioxide;
5-10 parts of an anti-blocking agent;
25-50 parts of ethylene oxide;
25-50 parts of paraffin;
25-50 parts of silicon dioxide.
As a further improvement of the present invention, the modified acrylic oligomer is prepared by the following method: adding 50-100 parts of (3-glycidoxypropyl) methyldiethoxysilane into a reaction kettle, and removing water at 120 ℃ in vacuum for 1.5-2 h; and then adding 2-5 parts of dimethylaniline into the reaction kettle, raising the temperature to 100-120 ℃, dropwise adding 50-100 parts of acrylic acid, reacting for 7-8 h after dropwise adding is finished within 25-30 min, cooling the material to below 40 ℃ after the reaction is finished, and discharging to obtain the modified acrylate oligomer.
As a further improvement of the invention, the preparation method of the printing adhesive comprises the following steps:
the method comprises the following steps: placing acrylic acid in a beaker, and neutralizing with a sodium hydroxide solution under the ice-water bath condition to remove a polymerization inhibitor;
step two: placing the neutralized acrylic acid, the modified acrylic acid oligomer, carboxymethyl starch, N' -methylene bisacrylamide and deionized water into a reaction kettle, starting stirring, heating a jacket until the temperature in the kettle reaches 60-80 ℃, quickly dropwise adding persulfate, reacting for 2-3 h, and discharging to obtain an acrylate emulsion;
step three: adding the acrylic ester emulsion into a dispersing barrel, starting a high-speed dispersing machine, adding and dispersing the paraffin, the titanium dioxide, the anti-blocking agent, the ethylene oxide and the silicon dioxide in sequence, and obtaining the acrylic ester emulsion after the surface of the adhesive cement is bright and fine.
As a further improvement of the invention, the particle size of the silicon dioxide is 4-10 um.
The invention has the beneficial effects that:
1. in the printing process, a porous sieve plate table top or a table top with a plurality of strip slit openings is selected, and an air blowing device and a heating wire are placed at the bottom of the table top, so that printing adhesive cement is firstly kept still for a preset time after printing on a printed product, and the adhesive cement is primarily cured; when the screen plate and the printed product are distinguished, dry hot air is blown out from gaps among the printing screen points to further solidify the adhesive cement and prevent the adhesive cement distributed on the printed product in a network point shape from collapsing and being connected with the adhesive cement screen points nearby into a whole, so that the adhesive cement screen points on a final finished product form a plurality of independent color points which are not connected with each other, the gaps among the color points are the parts originally covered by the longitude and latitude lines of the silk screen, and a plurality of air-permeable channels mixed among the color points of the printed pattern are formed among the gaps among the color points of the silk screen;
2. a net-shaped water absorption structure is formed in the prepared printing adhesive cement, and the printing adhesive cement has high viscosity and poor fluidity; the modified acrylate oligomer enables the surface of the adhesive cement to form a cured layer when in use, so that the surface can be quickly tack-free, the adhesive cement is not easy to be bonded with the adjacent adhesive cement again, and the purpose of quick surface drying is achieved.
Detailed Description
The present invention will be described in further detail with reference to examples.
Example 1
The printing adhesive cement comprises the following substances in parts by weight:
100 parts of carboxymethyl starch;
400 parts of acrylic acid;
200 parts of modified acrylic acid oligomer;
1800 parts of sodium hydroxide;
3 parts of potassium persulfate;
1.2 parts of N, N' -methylene bisacrylamide;
2500 parts of deionized water;
150 parts of titanium dioxide;
5 parts of anti-blocking agent;
25 parts of ethylene oxide;
25 parts of paraffin;
and (4) silicon dioxide 25.
The preparation method of the modified acrylic oligomer comprises the following steps: adding 50 parts of (3-glycidoxypropyl) methyldiethoxysilane into a reaction kettle, and removing water at 120 ℃ for 1.5 hours in vacuum; and then adding 2 parts of dimethylaniline into the reaction kettle, raising the temperature to 100 ℃, dropwise adding 50 parts of acrylic acid, controlling the dropwise adding within 25min to finish the reaction for 7h, cooling the material to below 40 ℃ after the reaction is finished, and discharging the material to obtain the modified acrylate oligomer.
The preparation method of the printing adhesive comprises the following steps:
the method comprises the following steps: placing acrylic acid in a beaker, and neutralizing with a sodium hydroxide solution under the ice-water bath condition to remove a polymerization inhibitor;
step two: placing the neutralized acrylic acid, the modified acrylic acid oligomer, the carboxymethyl starch, the N, N' -methylene bisacrylamide and the deionized water into a reaction kettle, starting stirring, heating a jacket until the temperature in the kettle reaches 60 ℃, quickly dripping persulfate, reacting for 2 hours, and discharging to obtain an acrylate emulsion;
step three: adding the acrylic ester emulsion into a dispersing barrel, starting a high-speed dispersing machine, sequentially adding and dispersing the paraffin, the titanium dioxide, the anti-blocking agent, the ethylene oxide and the silicon dioxide, wherein the particle size of the silicon dioxide is 4 mu m, and the surface of the adhesive cement is bright and fine.
Example 2
The printing adhesive cement comprises the following substances in parts by weight:
200 parts of carboxymethyl starch;
1200 parts of acrylic acid;
600 parts of modified acrylic acid oligomer;
3600 parts of sodium hydroxide;
9 parts of potassium persulfate;
3.6 parts of N, N' -methylene bisacrylamide;
500 parts of deionized water;
300 parts of titanium dioxide;
10 parts of anti-blocking net agent;
50 parts of ethylene oxide;
50 parts of paraffin;
and 50 parts of silicon dioxide.
The preparation method of the modified acrylic oligomer comprises the following steps: adding 100 parts of (3-glycidoxypropyl) methyldiethoxysilane into a reaction kettle, and removing water for 2 hours in vacuum at the temperature of 120 ℃; and then adding 5 parts of dimethylaniline into the reaction kettle, raising the temperature to 120 ℃, dropwise adding 100 parts of acrylic acid, controlling the dropwise adding within 30min to finish the reaction for 8h, cooling the material to below 40 ℃ after the reaction is finished, and discharging the material to obtain the modified acrylate oligomer.
The preparation method of the printing adhesive comprises the following steps:
the method comprises the following steps: placing acrylic acid in a beaker, and neutralizing with a sodium hydroxide solution under the ice-water bath condition to remove a polymerization inhibitor;
step two: placing the neutralized acrylic acid, the modified acrylic acid oligomer, carboxymethyl starch, N' -methylene bisacrylamide and deionized water into a reaction kettle, starting stirring, heating a jacket until the temperature in the kettle reaches 80 ℃, quickly dropwise adding persulfate, reacting for 3 hours, and discharging to obtain an acrylate emulsion;
step three: adding the acrylic ester emulsion into a dispersing barrel, starting a high-speed dispersing machine, sequentially adding and dispersing the paraffin, the titanium dioxide, the anti-blocking agent, the ethylene oxide and the silicon dioxide, wherein the particle size of the silicon dioxide is 10 mu m, and the surface of the adhesive cement is bright and fine.
Comparative example 1
The printing adhesive cement comprises the following substances in parts by weight:
200 parts of carboxymethyl starch;
1200 parts of acrylic acid;
3600 parts of sodium hydroxide;
9 parts of potassium persulfate;
3.6 parts of N, N' -methylene bisacrylamide;
500 parts of deionized water;
300 parts of titanium dioxide;
10 parts of anti-blocking net agent;
50 parts of ethylene oxide;
50 parts of paraffin;
and 50 parts of silicon dioxide.
The preparation method of the printing adhesive comprises the following steps:
the method comprises the following steps: placing acrylic acid in a beaker, and neutralizing with a sodium hydroxide solution under the ice-water bath condition to remove a polymerization inhibitor;
step two: placing the neutralized acrylic acid, carboxymethyl starch, N' -methylene bisacrylamide and deionized water in a reaction kettle, starting stirring, heating a jacket until the temperature in the kettle reaches 80 ℃, quickly dropwise adding persulfate, reacting for 3 hours, and discharging to obtain an acrylate emulsion;
step three: adding the acrylic ester emulsion into a dispersing barrel, starting a high-speed dispersing machine, sequentially adding and dispersing the paraffin, the titanium dioxide, the anti-blocking agent, the ethylene oxide and the silicon dioxide, wherein the particle size of the silicon dioxide is 10 mu m, and the surface of the adhesive cement is bright and fine.
Comparative example 2
The printing adhesive cement comprises the following substances in parts by weight:
1200 parts of acrylic acid;
3600 parts of sodium hydroxide;
9 parts of potassium persulfate;
3.6 parts of N, N' -methylene bisacrylamide;
500 parts of deionized water;
300 parts of titanium dioxide;
10 parts of anti-blocking net agent;
50 parts of ethylene oxide;
50 parts of paraffin;
and 50 parts of silicon dioxide.
The preparation method of the printing adhesive comprises the following steps:
the method comprises the following steps: placing acrylic acid in a beaker, and neutralizing with a sodium hydroxide solution under the ice-water bath condition to remove a polymerization inhibitor;
step two: placing the neutralized acrylic acid, N' -methylene bisacrylamide and deionized water in a reaction kettle, starting stirring, heating a jacket until the temperature in the kettle reaches 80 ℃, quickly dropwise adding persulfate, reacting for 3 hours, and discharging to obtain an acrylate emulsion;
step three: adding the acrylic ester emulsion into a dispersing barrel, starting a high-speed dispersing machine, sequentially adding and dispersing the paraffin, the titanium dioxide, the anti-blocking agent, the ethylene oxide and the silicon dioxide, wherein the particle size of the silicon dioxide is 10 mu m, and the surface of the adhesive cement is bright and fine.
Comparative example 3
The printing adhesive cement comprises the following substances in parts by weight:
1200 parts of acrylic acid;
600 parts of modified acrylic acid oligomer;
3600 parts of sodium hydroxide;
9 parts of persulfate;
3.6 parts of N, N' -methylene bisacrylamide;
500 parts of deionized water;
300 parts of titanium dioxide;
10 parts of anti-blocking net agent;
50 parts of ethylene oxide;
50 parts of paraffin;
and 50 parts of silicon dioxide.
The preparation method of the modified acrylic oligomer comprises the following steps: adding 100 parts of (3-glycidoxypropyl) methyldiethoxysilane into a reaction kettle, and removing water for 2 hours in vacuum at the temperature of 120 ℃; and then adding 5 parts of dimethylaniline into the reaction kettle, raising the temperature to 120 ℃, dropwise adding 100 parts of acrylic acid, controlling the dropwise adding within 30min to finish the reaction for 8h, cooling the material to below 40 ℃ after the reaction is finished, and discharging the material to obtain the modified acrylate oligomer.
The preparation method of the printing adhesive comprises the following steps:
the method comprises the following steps: placing acrylic acid in a beaker, and neutralizing with a sodium hydroxide solution under the ice-water bath condition to remove a polymerization inhibitor;
step two: placing the neutralized acrylic acid, the modified acrylic acid oligomer, N' -methylene bisacrylamide and deionized water in a reaction kettle, starting stirring, heating a jacket until the temperature in the kettle reaches 80 ℃, quickly dropwise adding persulfate, reacting for 3 hours, and discharging to obtain an acrylate emulsion;
step three: adding the acrylic ester emulsion into a dispersing barrel, starting a high-speed dispersing machine, sequentially adding and dispersing the paraffin, the titanium dioxide, the anti-blocking agent, the ethylene oxide and the silicon dioxide, wherein the particle size of the silicon dioxide is 10 mu m, and the surface of the adhesive cement is bright and fine.
The mucilage prepared in the examples 1-2 and the comparative examples 1-3 is applied to the production process of the breathable printed fabric, and the production process comprises the following steps:
the method comprises the following steps: selecting a screen, wherein the mesh number of the screen is 250, and the thickness of the screen is 5 um;
step two: stretching the screen manually or mechanically, wherein the longitude and latitude screen wires of the screen and the screen frame form an angle of 35 degrees, when the screen is stretched on the aluminum alloy screen frame, the screen and the aluminum alloy screen frame are bonded together by coating screen bonding glue, after the screen bonding glue is completely dried, the screen stretching machine is loosened to relieve the stretched state of the screen, the redundant screen wires on the periphery of the screen frame are cut off, and the screen stretching machine is used after being washed and dried by using a cleaning agent and clear water;
step three: coating a photosensitive resist, uniformly coating the photosensitive resist on a silk screen, wherein the thickness of the photosensitive resist on the surface which is in contact with the printing adhesive cement is 3.5 percent of the thickness of the silk screen, the thickness of the photosensitive resist on the surface which is not in contact with the printing adhesive cement is 2.5 percent of the thickness of the silk screen, and after the coating is finished, keeping the silk screen to be dried at 35 ℃;
printing down, namely, tightly attaching the film negative to the silk screen coated with the photosensitive glue for exposure, wherein the distance between the lamp and the screen is 50cm, and the exposure time is 6 min; wetting with normal temperature water after exposure, washing with a high-pressure water gun after 5min until the pictures and texts are clear, wherein the direction of high-pressure water flow is vertical to the screen plate;
step five: fixing the screen plate on a printing machine, wherein the surface of the screen plate, which is not contacted with printing mucilage, faces the table top of the printing machine, and setting the distance between the screen plate and the table top; the table top adopts a porous sieve plate table top or a table top with a plurality of slit openings; the bottom of the table top is provided with a blast device and a heating wire so as to output dry hot air to the table top;
step six: adding printing adhesive cement on the screen plate, extruding and scraping the adhesive cement through a scraper plate, and printing a product to be printed; after the scraping stroke of the scraper is finished, keeping the screen and the printed product still within preset time, wherein the preset time is set to be 3s, and preliminarily curing the printing adhesive cement; then separating the screen plate and the printed product, wherein dry hot air is blown out from gaps among printing dots, and the printing adhesive cement is further cured;
step seven: taking the printed product off the table board, and baking the printed product through a tunnel oven to completely cure the printing adhesive paste, wherein the temperature of the tunnel oven is set to 125 ℃.
The mucilage prepared in the examples 1-2 and the comparative examples 1-3 is applied to the production process of the printed fabric of the traditional process, and comprises the following steps:
the method comprises the following steps: selecting a screen, wherein the mesh number of the screen is 100, and the thickness of the screen is 5 um;
step two: stretching the screen manually or mechanically, wherein the longitude and latitude screen wires of the screen and the screen frame form an angle of 35 degrees, when the screen is stretched on the aluminum alloy screen frame, the screen and the aluminum alloy screen frame are bonded together by coating screen bonding glue, after the screen bonding glue is completely dried, the screen stretching machine is loosened to relieve the stretched state of the screen, the redundant screen wires on the periphery of the screen frame are cut off, and the screen stretching machine is used after being washed and dried by using a cleaning agent and clear water;
step three: coating a photosensitive resist, uniformly coating the photosensitive resist on a silk screen, wherein the thickness of the photosensitive resist on the surface which is in contact with the printing adhesive cement is 3.5 percent of the thickness of the silk screen, the thickness of the photosensitive resist on the surface which is not in contact with the printing adhesive cement is 2.5 percent of the thickness of the silk screen, and after the coating is finished, keeping the silk screen to be dried at 35 ℃;
printing down, namely, tightly attaching the film negative to the silk screen coated with the photosensitive glue for exposure, wherein the distance between the lamp and the screen is 50cm, and the exposure time is 6 min; wetting with normal temperature water after exposure, washing with a high-pressure water gun after 5min until the pictures and texts are clear, wherein the direction of high-pressure water flow is vertical to the screen plate;
step five: fixing the screen plate on a printing machine, wherein the surface of the screen plate, which is not contacted with printing mucilage, faces the table top of the printing machine, and setting the distance between the screen plate and the table top;
step six: adding printing adhesive cement on the screen plate, extruding and scraping the adhesive cement through a scraper plate, and printing a product to be printed;
step seven: taking the printed product off the table board, and baking the printed product through a tunnel oven to completely cure the printing adhesive paste, wherein the temperature of the tunnel oven is set to 125 ℃.
First, drip experiment
And (5) placing water drops in a printing area of the fabric, observing the permeation condition of the water drops, and recording the time length for completing permeation.
Second, performance test
In the production process of the breathable printed fabric, the silk screen with the mesh number of 150-350 is selected in the first step, so that the silk-screen product is more exquisite and fine; in the second step, the longitude and latitude mesh wires of the mesh screen and the mesh frame form an angle of 30-40 degrees, so that the influence on the appearance caused by the phenomenon of mesh collision due to the consistency of the cross-hatching and the cloth grain is avoided; in the third step, the thickness of the photosensitive adhesive on the contact surface of the printing adhesive is 2-5% of the thickness of the silk screen, and the thickness of the photosensitive adhesive on the non-contact surface of the printing adhesive is 0-5% of the thickness of the silk screen, so that the adhesive is attached as thin as possible on the premise of ensuring the strength, texture and definition of the silk screen; in the fourth step, the direction of high-pressure water flow is vertical to the screen plate so as to prevent the phenomenon that the edge of the screen plate is sawtoothed due to damage; after the scraping stroke of the scraper is finished, keeping the screen plate and the printed product relatively still for a preset time, and primarily curing the adhesive cement; then separating the screen plate and the printed product, wherein at the moment, dry hot air is blown out from gaps among the printing screen points to further solidify the mucilage and prevent the mucilage which is distributed on the printed product in a dot shape from collapsing and being connected with the adjacent mucilage screen points into a whole; forming a plurality of independent color points which are not connected with each other on the adhesive cement mesh points on the final finished product, wherein gaps among the color points are the parts which are originally covered by the warps and the wefts of the silk screen; at this time, gaps among the pigment dots form a plurality of air-permeable channels which are arranged among the pigment dots of the printed pattern.
The printing adhesive cement is prepared by mixing acrylate emulsion, paraffin, titanium dioxide, an anti-blocking agent, ethylene oxide and silicon dioxide, and the preparation method of the acrylate emulsion comprises the following steps: adding an N, N' -methylene bisacrylamide cross-linking agent and a persulfate initiator into an acrylic acid monomer and carboxymethyl starch, preparing a colloid through copolymerization, wherein the viscosity of a colloid system is increased along with the increase of reaction time, the carboxymethyl starch has more hydroxyl groups and has good hydrophilicity, a good space net water absorption structure can be formed, and partially neutralized acrylic acid has a strong hydrophilic group-COONa, so that cohesion of water molecules is facilitated; under the action of N, N' -methylene bisacrylamide, the spatial network structure is enhanced, which is beneficial to the water holding of the network structure, so that in the process of heating and curing of the printing adhesive cement prepared subsequently, due to the formation of the network water absorption structure, the water holding performance of the adhesive is good, the viscosity of the system is increased, the fluidity of the system is reduced, and the adhesive cement is not easy to bond with the adjacent adhesive cement again;
modified acrylate oligomer is added, after (3-glycidoxypropyl) methyldiethoxysilane is adopted to react with acrylic acid, a cured layer is formed on the surface of a colloid when the generated oligomer is used, and the surface is quickly tack free, so that the adhesive cement is further prevented from being bonded with the adjacent adhesive cement again, and the aim of quick surface drying is fulfilled.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (9)
1. A production process of a breathable printed fabric is characterized by comprising the following steps: the method comprises the following steps:
the method comprises the following steps: selecting a screen, wherein the thickness of the screen is 3-7 um;
step two: stretching the screen manually or mechanically, bonding the screen and the aluminum alloy screen frame together by coating screen bonding glue after the screen is stretched on the aluminum alloy screen frame, loosening the screen stretching machine after the screen bonding glue is completely dried to relieve the stretched state of the screen, cutting off redundant screen wires on the periphery of the screen frame, and washing and drying the screen by using a cleaning agent and clear water;
step three: coating a photosensitive adhesive, uniformly coating the photosensitive adhesive on a screen, wherein the thickness of the photosensitive adhesive on the surface which is in contact with the printing adhesive cement is 2-5% of the thickness of the screen, the thickness of the photosensitive adhesive on the surface which is not in contact with the printing adhesive cement is 0-5% of the thickness of the screen, and after coating, keeping the screen at 30-40 ℃ for drying to form a screen plate;
printing a plate, namely, tightly attaching a film negative to a silk screen coated with photosensitive glue for exposure, wherein the distance between a lamp and the screen plate is 40-60 cm, and the exposure time is 5-7 min; wetting the exposed image by using normal-temperature water, and flushing the image by using a high-pressure water gun after 3-6 min until the image and text are clear;
step five: fixing the screen plate on a printing machine, wherein the surface of the screen plate, which is not contacted with printing mucilage, faces the table top of the printing machine, and setting the distance between the screen plate and the table top; the table top adopts a porous sieve plate table top or a table top with a plurality of slit openings; the bottom of the table top is provided with a blast device and a heating wire so as to output dry hot air to the table top;
step six: adding printing adhesive cement on the screen plate, extruding and scraping the adhesive cement through a scraper plate, and printing a product to be printed; after the scraping stroke of the scraper is finished, keeping the screen and the printed product still within preset time, wherein the preset time is set to be 1-5 s, and preliminarily curing the printing adhesive cement; then separating the screen plate and the printed product, wherein dry hot air is blown out from gaps among printing dots, and the printing adhesive cement is further cured;
step seven: and taking the printed product off the table board, and baking the printed product through a tunnel oven to completely cure the printing adhesive.
2. The production process of the breathable printed fabric according to claim 1, characterized by comprising the following steps: in the first step, the mesh number of the silk screen is between 150 and 350.
3. The production process of the breathable printed fabric according to claim 1, characterized by comprising the following steps: in the second step, the longitude and latitude mesh of the mesh screen and the mesh frame form an angle of 30-40 degrees.
4. The production process of the breathable printed fabric according to claim 1, characterized by comprising the following steps: in the fourth step, the direction of the high-pressure water flow is vertical to the screen plate.
5. The production process of the breathable printed fabric according to claim 1, characterized by comprising the following steps: in the seventh step, the temperature of the oven is set to be 100-150 ℃.
6. The printing paste as claimed in claim 1, wherein: the composition comprises the following components in parts by weight:
100-200 parts of carboxymethyl starch;
400-1200 parts of acrylic acid;
200-600 parts of modified acrylic acid oligomer;
1800-3600 parts of sodium hydroxide;
3-9 parts of persulfate;
1.2-3.6 parts of N, N' -methylene bisacrylamide;
2500-4500 parts of deionized water;
150-300 parts of titanium dioxide;
5-10 parts of an anti-blocking agent;
25-50 parts of ethylene oxide;
25-50 parts of paraffin;
25-50 parts of silicon dioxide.
7. The printing paste as claimed in claim 6, wherein: the preparation method of the modified acrylic oligomer comprises the following steps: adding 50-100 parts of (3-glycidoxypropyl) methyldiethoxysilane into a reaction kettle, and removing water at 120 ℃ in vacuum for 1.5-2 h; and then adding 2-5 parts of dimethylaniline into the reaction kettle, raising the temperature to 100-120 ℃, dropwise adding 50-100 parts of acrylic acid, reacting for 7-8 h after dropwise adding is finished within 25-30 min, cooling the material to below 40 ℃ after the reaction is finished, and discharging to obtain the modified acrylate oligomer.
8. The printing paste as claimed in claim 5, wherein: the preparation method of the printing adhesive comprises the following steps:
the method comprises the following steps: placing acrylic acid in a beaker, and neutralizing with a sodium hydroxide solution under the ice-water bath condition to remove a polymerization inhibitor;
step two: placing the neutralized acrylic acid, the modified acrylic acid oligomer, carboxymethyl starch, N' -methylene bisacrylamide and deionized water into a reaction kettle, starting stirring, heating a jacket until the temperature in the kettle reaches 60-80 ℃, quickly dropwise adding persulfate, reacting for 2-3 h, and discharging to obtain an acrylate emulsion;
step three: adding the acrylic ester emulsion into a dispersing barrel, starting a high-speed dispersing machine, adding and dispersing the paraffin, the titanium dioxide, the anti-blocking agent, the ethylene oxide and the silicon dioxide in sequence, and obtaining the acrylic ester emulsion after the surface of the adhesive cement is bright and fine.
9. The printing paste as claimed in claim 8, wherein: the particle size of the silicon dioxide is 4-10 um.
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