CN111041865B - Production process of breathable printed fabric - Google Patents
Production process of breathable printed fabric Download PDFInfo
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- CN111041865B CN111041865B CN201911094499.6A CN201911094499A CN111041865B CN 111041865 B CN111041865 B CN 111041865B CN 201911094499 A CN201911094499 A CN 201911094499A CN 111041865 B CN111041865 B CN 111041865B
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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
-
- 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
-
- 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)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Molecular Biology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Printing Methods (AREA)
Abstract
The invention discloses a production process of breathable printed fabric, which is characterized by comprising the following steps: step one: selecting a net; step two: stretching the net, coating net sticking glue, loosening a net stretching machine after the net sticking glue is completely dried, cutting off redundant net wires on the periphery of the net frame, and cleaning and airing; step three: coating photoresist; step four: printing down; step five: fixing the screen plate on a printing machine, wherein the table top adopts a porous screen plate table top or a table top with a plurality of elongated slit openings; the bottom of the table top is provided with a blowing device and a heating wire; step six: adding printing mucilage on the screen, extruding the scraping mucilage through a scraper, and printing a product to be printed; after the scraping stroke of the scraper is completed, the screen plate and the printing product are kept stationary for a preset time, and then the screen plate and the printing product are separated; step seven: the tunnel oven is used for baking to completely solidify the printing adhesive cement, and the ventilation effect of the garment 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 breathable printed fabric.
Background
Compared with water paste printing, the cement printing process has the advantages of being capable of adapting to materials with various color depths, and has the characteristics of wide application range, rich colors, high reduction degree and the like. At present, the printing of the adhesive cement is mainly based on the printing of a screen printing process, but the printing patterns obtained by the traditional adhesive cement printing process are not soft enough, the printing effect is blocky, the ventilation and moisture permeability effects are poor, and the wearer feels airtight. Therefore, in order to ensure the breathability of the garment, the current printing technology usually only prints small color block patterns or designs a large number of hollowed-out structures in the garment fabric so as to reduce the shielding area of the fabric by the printed patterns, which limits the application of the mucilage printing.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a production process of breathable printed fabric, which can improve the breathable effect of clothing printing and enable a user to feel more comfortable under the condition of not reducing the pattern coverage area.
In order to achieve the above purpose, the present invention provides the following technical solutions: a production process of breathable printed fabric comprises the following steps:
step one: selecting a silk screen, wherein the thickness of the silk screen is 3-7 um;
step two: stretching the screen by adopting a manual or machine, after the screen is stretched on the aluminum alloy screen frame, bonding the screen and the aluminum alloy screen frame together by coating a screen adhesive, loosening a screen stretching machine to release the stretched state of the screen after the screen adhesive is completely dried, cutting off redundant screen on the periphery of the screen frame, and flushing with cleaning agent and clear water for airing;
step three: coating photoresist, namely uniformly coating the photoresist on a silk screen, wherein the thickness of the photoresist on the side contacted with printing photoresist is 2-5% of the thickness of the silk screen, and the thickness of the photoresist on the side not contacted with the printing photoresist is 0-5% of the thickness of the silk screen, and after the coating is finished, keeping the silk screen at 30-40 ℃ and drying;
step four, printing down, namely tightly attaching a film negative to a silk screen coated with photoresist for exposure, wherein the distance between a lamp and a screen plate is 40-60 cm, and the exposure time is 5-7 min; wetting with normal temperature water after exposure, and flushing with a high-pressure water gun after 3-6 min until the images and texts are clear;
step five: fixing the screen plate on a printing machine, wherein the surface of the screen mesh, 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 elongated slit openings; the bottom of the table top is provided with a blowing device and a heating wire so as to output dry hot air to the table top;
step six: adding printing mucilage on the screen, extruding the scraping mucilage through a scraper, and printing a product to be printed; after the scraping stroke of the scraper is completed, the screen plate and the printing product are kept static in a preset time, the preset time is set to be 1-5 s, and the printing mucilage is primarily solidified; then separating the screen plate from the printed product, at the moment, blowing dry hot air out from gaps among printing dots, and further curing the printing mucilage;
step seven: the printed article is removed from the table and baked in a tunnel oven to completely cure the printing cement.
As a further improvement of the invention, in the first step, the mesh number of the silk screen is between 150 and 350.
As a further improvement of the invention, in the second step, the longitude and latitude net wires of the silk screen form an angle of 30-40 degrees with the net frame.
As a further improvement of the present invention, in the fourth step, the high-pressure water flow direction is perpendicular to the mesh plate.
As a further improvement of the present invention, in the seventh step, the oven temperature is set to 100 to 150 ℃.
The printing adhesive cement consists of 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 to 3.6 portions of N, N' -methylene bisacrylamide;
2500-4500 parts of deionized water;
150-300 parts of titanium dioxide;
5-10 parts of anti-blocking net 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 as follows: adding 50-100 parts of (3-glycidoxypropyl) methyldiethoxysilane into a reaction kettle, and vacuum dehydrating for 1.5-2 h at 120 ℃; then adding 2-5 parts of dimethylaniline into a reaction kettle, raising the temperature to 100-120 ℃, dropwise adding 50-100 parts of acrylic acid, controlling the dropwise adding within 25-30 min, reacting for 7-8 h, lowering the temperature of the material to below 40 ℃ after the reaction is finished, and discharging to obtain the modified acrylic ester oligomer.
As a further improvement of the present invention, the preparation method of the printing cement comprises the following steps:
step one: placing acrylic acid in a beaker, and neutralizing with sodium hydroxide solution under ice water bath condition to remove 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 to 60-80 ℃, starting to quickly dropwise add persulfate, reacting for 2-3 h, and discharging to obtain an acrylic ester emulsion;
step three: adding the acrylic ester emulsion into a dispersing barrel, starting a high-speed dispersing machine, and sequentially adding paraffin, titanium pigment, an anti-blocking net agent, ethylene oxide and silicon dioxide into the dispersing barrel for dispersing until the surface of the mucilage 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 screen plate table board or a table board with a plurality of elongated slit openings is selected, and a blowing device and a heating wire are placed at the bottom of the table board, so that after printing the printing paste on a printed product, the printing paste is firstly stationary for a preset time, and the paste is primarily solidified; when the screen plate and the printing product are respectively carried out, dry hot air is blown out from gaps among printing dots, so that the adhesive cement is further solidified, and the adhesive cement distributed on the printing product in a dot shape is prevented from collapsing and being connected with adjacent adhesive cement dots into a whole, so that the adhesive cement dots on the final product form a plurality of independent pigment dots which are not connected with each other, the gaps among the pigment dots are the parts covered by silk screens through wefts, and the gaps among the pigment dots form countless ventilation channels which are mingled among pigment dots of the printing pattern;
2. the prepared printing adhesive cement forms a netlike water absorption structure, and has high viscosity and poor fluidity; the modified acrylic ester oligomer enables the surface of the mucilage to form a solidified layer when the mucilage is used, so that the surface is quickly tack-free, the mucilage is not easy to be re-adhered with the adjacent mucilage, 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 consists of the following components 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 an anti-blocking net agent;
25 parts of ethylene oxide;
25 parts of paraffin;
silica 25.
The preparation method of the modified acrylic acid oligomer comprises the following steps: 50 parts of (3-glycidoxypropyl) methyldiethoxysilane are added into a reaction kettle, and water is removed in vacuum for 1.5 hours at the temperature of 120 ℃; then adding 2 parts of dimethylaniline into a reaction kettle, raising the temperature to 100 ℃, dropwise adding 50 parts of acrylic acid, controlling the dropwise adding within 25min, reacting for 7h, reducing the temperature of the material to below 40 ℃ after the reaction is finished, and discharging to obtain the modified acrylic ester oligomer.
The preparation method of the printing mucilage comprises the following steps:
step one: placing acrylic acid in a beaker, and neutralizing with sodium hydroxide solution under ice water bath condition to remove 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 to 60 ℃, starting to quickly dropwise add persulfate, reacting for 2 hours, and discharging to obtain an acrylic ester emulsion;
step three: adding the acrylic ester emulsion into a dispersing barrel, starting a high-speed dispersing machine, adding paraffin, titanium pigment, an anti-blocking net agent, ethylene oxide and silicon dioxide into the dispersing barrel in sequence for dispersing, wherein the particle size of the silicon dioxide is 4um, and the surface of the mucilage is bright and fine.
Example 2
The printing adhesive cement consists of the following components 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 an anti-blocking net agent;
50 parts of ethylene oxide;
50 parts of paraffin;
50 parts of silicon dioxide.
The preparation method of the modified acrylic acid oligomer comprises the following steps: adding 100 parts of (3-glycidoxypropyl) methyldiethoxysilane into a reaction kettle, and vacuum dehydrating for 2 hours at the temperature of 120 ℃; then adding 5 parts of dimethylaniline into a reaction kettle, raising the temperature to 120 ℃, dropwise adding 100 parts of acrylic acid, controlling the dropwise adding within 30min, reacting for 8 hours, lowering the temperature of the material to below 40 ℃ after the reaction is finished, and discharging to obtain the modified acrylic ester oligomer.
The preparation method of the printing mucilage comprises the following steps:
step one: placing acrylic acid in a beaker, and neutralizing with sodium hydroxide solution under ice water bath condition to remove 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 to 80 ℃, starting to quickly dropwise add persulfate, reacting for 3 hours, and discharging to obtain an acrylic ester emulsion;
step three: adding the acrylic ester emulsion into a dispersing barrel, starting a high-speed dispersing machine, adding paraffin, titanium pigment, an anti-blocking net agent, ethylene oxide and silicon dioxide into the dispersing barrel in sequence for dispersing, wherein the particle size of the silicon dioxide is 10 mu m, and the surface of the mucilage is bright and fine.
Comparative example 1
The printing adhesive cement consists of the following components 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 an anti-blocking net agent;
50 parts of ethylene oxide;
50 parts of paraffin;
50 parts of silicon dioxide.
The preparation method of the printing mucilage comprises the following steps:
step one: placing acrylic acid in a beaker, and neutralizing with sodium hydroxide solution under ice water bath condition to remove polymerization inhibitor;
step two: placing the neutralized acrylic acid, 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 ℃, starting to quickly dropwise add persulfate, reacting for 3 hours, and discharging to obtain an acrylic ester emulsion;
step three: adding the acrylic ester emulsion into a dispersing barrel, starting a high-speed dispersing machine, adding paraffin, titanium pigment, an anti-blocking net agent, ethylene oxide and silicon dioxide into the dispersing barrel in sequence for dispersing, wherein the particle size of the silicon dioxide is 10 mu m, and the surface of the mucilage is bright and fine.
Comparative example 2
The printing adhesive cement consists of the following components 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 an anti-blocking net agent;
50 parts of ethylene oxide;
50 parts of paraffin;
50 parts of silicon dioxide.
The preparation method of the printing mucilage comprises the following steps:
step one: placing acrylic acid in a beaker, and neutralizing with sodium hydroxide solution under ice water bath condition to remove polymerization inhibitor;
step two: placing the neutralized acrylic acid, N' -methylene bisacrylamide and deionized water into a reaction kettle, starting stirring, heating a jacket to 80 ℃, starting to quickly dropwise add persulfate when the temperature in the kettle reaches 80 ℃, reacting for 3 hours, and discharging to obtain an acrylic ester emulsion;
step three: adding the acrylic ester emulsion into a dispersing barrel, starting a high-speed dispersing machine, adding paraffin, titanium pigment, an anti-blocking net agent, ethylene oxide and silicon dioxide into the dispersing barrel in sequence for dispersing, wherein the particle size of the silicon dioxide is 10 mu m, and the surface of the mucilage is bright and fine.
Comparative example 3
The printing adhesive cement consists of the following components 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 an anti-blocking net agent;
50 parts of ethylene oxide;
50 parts of paraffin;
50 parts of silicon dioxide.
The preparation method of the modified acrylic acid oligomer comprises the following steps: adding 100 parts of (3-glycidoxypropyl) methyldiethoxysilane into a reaction kettle, and vacuum dehydrating for 2 hours at the temperature of 120 ℃; then adding 5 parts of dimethylaniline into a reaction kettle, raising the temperature to 120 ℃, dropwise adding 100 parts of acrylic acid, controlling the dropwise adding within 30min, reacting for 8 hours, lowering the temperature of the material to below 40 ℃ after the reaction is finished, and discharging to obtain the modified acrylic ester oligomer.
The preparation method of the printing mucilage comprises the following steps:
step one: placing acrylic acid in a beaker, and neutralizing with sodium hydroxide solution under ice water bath condition to remove polymerization inhibitor;
step two: placing the neutralized acrylic acid, the modified acrylic acid oligomer, 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 80 ℃, starting to quickly dropwise add persulfate, reacting for 3 hours, and discharging to obtain an acrylic ester emulsion;
step three: adding the acrylic ester emulsion into a dispersing barrel, starting a high-speed dispersing machine, adding paraffin, titanium pigment, an anti-blocking net agent, ethylene oxide and silicon dioxide into the dispersing barrel in sequence for dispersing, wherein the particle size of the silicon dioxide is 10 mu m, and the surface of the mucilage 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 provided by the invention, and comprises the following steps:
step one: selecting a silk screen with the mesh number of 250 and the thickness of 5um;
step two: stretching the screen by adopting a manual or machine, wherein the longitude and latitude screen wires of the screen form an angle of 35 degrees with the screen frame, after the screen is stretched on the aluminum alloy screen frame, the screen is bonded with the aluminum alloy screen frame by coating screen gluing glue, after the screen gluing glue is completely dried, the screen stretching machine is loosened to release the stretched state of the screen, redundant screen wires on the periphery of the screen frame are cut off, and the screen frame can be used after washing and airing with cleaning agent and clear water;
step three: coating photoresist, namely uniformly coating the photoresist on a silk screen, wherein the thickness of the photoresist on the side contacted with printing photoresist is 3.5% of the thickness of the silk screen, and the thickness of the photoresist on the side not contacted with the printing photoresist is 2.5% of the thickness of the silk screen, and after the coating is finished, keeping the silk screen at 35 ℃ and drying;
printing down, namely tightly attaching a film negative film to the silk screen coated with the photoresist for exposure, wherein the distance between a lamp and a screen plate is 50cm, and the exposure time is 6min; wetting with normal temperature water after exposure, flushing with a high pressure water gun after 5min until the images and texts are clear, wherein the high pressure water flow direction is vertical to the screen plate;
step five: fixing the screen plate on a printing machine, wherein the surface of the screen mesh, 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 elongated slit openings; the bottom of the table top is provided with a blowing device and a heating wire so as to output dry hot air to the table top;
step six: adding printing mucilage on the screen, extruding the scraping mucilage through a scraper, and printing a product to be printed; after the scraping stroke of the scraper is completed, the screen plate and the printing product are kept stationary within a preset time, the preset time is set to be 3s, and the printing cement is primarily solidified; then separating the screen plate from the printed product, at the moment, blowing dry hot air out from gaps among printing dots, and further curing the printing mucilage;
step seven: the printed article was removed from the table and baked through a tunnel oven set at 125 c to fully cure the printing cement.
The production process of applying the cement prepared in examples 1-2 and comparative examples 1-3 to the printed fabric of the conventional process comprises the following steps:
step one: selecting a silk screen with the mesh number of 100 and the thickness of 5um;
step two: stretching the screen by adopting a manual or machine, wherein the longitude and latitude screen wires of the screen form an angle of 35 degrees with the screen frame, after the screen is stretched on the aluminum alloy screen frame, the screen is bonded with the aluminum alloy screen frame by coating screen gluing glue, after the screen gluing glue is completely dried, the screen stretching machine is loosened to release the stretched state of the screen, redundant screen wires on the periphery of the screen frame are cut off, and the screen frame can be used after washing and airing with cleaning agent and clear water;
step three: coating photoresist, namely uniformly coating the photoresist on a silk screen, wherein the thickness of the photoresist on the side contacted with printing photoresist is 3.5% of the thickness of the silk screen, and the thickness of the photoresist on the side not contacted with the printing photoresist is 2.5% of the thickness of the silk screen, and after the coating is finished, keeping the silk screen at 35 ℃ and drying;
printing down, namely tightly attaching a film negative film to the silk screen coated with the photoresist for exposure, wherein the distance between a lamp and a screen plate is 50cm, and the exposure time is 6min; wetting with normal temperature water after exposure, flushing with a high pressure water gun after 5min until the images and texts are clear, wherein the high pressure water flow direction is vertical to the screen plate;
step five: fixing the screen plate on a printing machine, wherein the surface of the screen mesh, 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 mucilage on the screen, extruding the scraping mucilage through a scraper, and printing a product to be printed;
step seven: the printed article was removed from the table and baked through a tunnel oven set at 125 c to fully cure the printing cement.
1. Drip test
And (3) water drops are arranged in a printing area of the fabric, the penetration condition of the water drops is observed, and the time period for completing penetration is recorded.
2. Performance testing
In the production process of the breathable printed fabric, firstly, a silk screen with the mesh number of 150-350 is selected, so that the silk-screen printing product is more exquisite and finer; in the second step, the longitude and latitude net wires of the silk screen form an angle of 30-40 degrees with the net frame, so as to avoid the phenomenon that net collision is generated when the net lines are consistent with the cloth lines, thereby affecting the beautiful appearance; the photoresist thickness of the contact surface of the printing adhesive cement is 2-5% of the thickness of the silk screen, and the photoresist thickness of the non-contact surface of the printing adhesive cement is 0-5% of the thickness of the silk screen, so that the adhesion of the adhesive cement which is as thin as possible is obtained on the premise of ensuring the strength of the silk screen and the texture and definition of patterns; the high-pressure water flow direction in the fourth step is vertical to the screen plate so as to prevent the phenomenon of edge saw teeth caused by damaging the screen film; step six, after the scraping stroke of the scraping plate is completed, keeping the screen plate and the printing product relatively static for a preset time, so that the mucilage is primarily solidified; then separating the screen plate from the printing product, at the moment, blowing dry hot air from gaps among printing dots, further solidifying the mucilage, and preventing the mucilage distributed on the printing product in a dot shape from collapsing and connecting with the mucilage dots nearby; so that the mucilage net points on the final finished product form a plurality of independent pigment points which are not connected with each other, and the gaps among the pigment points are the parts which are originally covered by the warps and the wefts of the silk screen; at this time, gaps between the individual pigment dots form innumerable ventilation channels which are interposed between the pigment dots of the printed pattern.
The printing mucilage is prepared by mixing acrylic ester emulsion, paraffin, titanium pigment, an anti-blocking net agent, ethylene oxide and silicon dioxide, and the preparation method of the acrylic ester emulsion comprises the following steps: adding N, N' -methylene bisacrylamide cross-linking agent and persulfate initiator into acrylic acid monomer and carboxymethyl starch, and preparing colloid through copolymerization reaction, wherein the viscosity of a colloid system is increased along with the increase of reaction time, the carboxymethyl starch has more hydroxyl groups, good hydrophilicity is achieved, a good space reticular water absorption structure can be formed, and the partially neutralized acrylic acid has a strong hydrophilic group-COONa, which is beneficial to cohesion of water molecules; under the action of N, N' -methylene bisacrylamide, the space reticular structure is enhanced, so that water holding of the reticular structure is facilitated, and in the process of heating and curing of the printing adhesive cement prepared subsequently, the colloid water holding performance is good due to the formation of the reticular water absorbing structure, the viscosity of the system is increased, the fluidity of the system is reduced, and the printing adhesive cement is not easy to be re-bonded with adjacent adhesive cement;
after the modified acrylic acid oligomer is reacted with the (3-glycidoxypropyl) methyldiethoxysilane, the generated oligomer forms a solidified layer on the surface of the colloid when in use, and the quick viscosity elimination of the surface is realized, so that the re-adhesion of the mucilage and the adjacent mucilage is further avoided, and the purpose of quick surface drying is achieved.
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 examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the present invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the present invention.
Claims (4)
1. A production process of breathable printed fabric is characterized by comprising the following steps: the method comprises the following steps:
step one: selecting a silk screen, wherein the thickness of the silk screen is 3-7 um;
step two: stretching the screen by hands or a machine, after the screen is stretched on the aluminum alloy screen frame, bonding the screen and the aluminum alloy screen frame together by coating screen gluing glue, loosening a screen stretching machine to release the stretched state of the screen after the screen gluing glue is completely dried, cutting off redundant screen wires on the periphery of the screen frame, and flushing with cleaning agent and clear water for airing to obtain the aluminum alloy screen frame;
step three: coating photoresist, namely uniformly coating the photoresist on a silk screen, wherein the thickness of the photoresist on the side contacted with printing photoresist is 2-5% of the thickness of the silk screen, and the thickness of the photoresist on the side not contacted with the printing photoresist is 0-5% of the thickness of the silk screen, and after the coating is finished, keeping the silk screen at 30-40 ℃ and drying to form a screen plate;
step four, printing down, namely tightly attaching a film negative to a silk screen coated with photoresist for exposure, wherein the distance between a lamp and a screen plate is 40-60 cm, and the exposure time is 5-7 min; wetting with normal temperature water after exposure, and flushing with a high-pressure water gun after 3-6 min until the images and texts are clear;
step five: fixing the screen plate on a printing machine, wherein the surface of the screen mesh, 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 elongated slit openings; the bottom of the table top is provided with a blowing device and a heating wire so as to output dry hot air to the table top;
step six: adding printing mucilage on the screen, extruding the scraping mucilage through a scraper, and printing a product to be printed; after the scraping stroke of the scraper is completed, the screen plate and the printing product are kept static in a preset time, the preset time is set to be 1-5 s, and the printing mucilage is primarily solidified; then separating the screen plate from the printed product, at the moment, blowing dry hot air out from gaps among printing dots, and further curing the printing mucilage;
step seven: taking the printed product off the table top, and baking the printed product through a tunnel oven to completely solidify the printing adhesive cement;
in the first step, the mesh number of the silk screen is 150-350.
2. The production process of the breathable printed fabric according to claim 1, wherein the production process comprises the following steps: in the second step, the longitude and latitude mesh and the frame of the silk screen form an angle of 30-40 degrees.
3. The production process of the breathable printed fabric according to claim 1, wherein the production process comprises the following steps: in the fourth step, the high-pressure water flow direction is perpendicular to the screen plate.
4. The production process of the breathable printed fabric according to claim 1, wherein the production process comprises the following steps: in the seventh step, the temperature of the oven is set to be 100-150 ℃.
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