CN111005247A - Bronzing adhesive and preparation method and application thereof - Google Patents
Bronzing adhesive and preparation method and application thereof Download PDFInfo
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- CN111005247A CN111005247A CN201911378922.5A CN201911378922A CN111005247A CN 111005247 A CN111005247 A CN 111005247A CN 201911378922 A CN201911378922 A CN 201911378922A CN 111005247 A CN111005247 A CN 111005247A
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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
- D06P1/5264—Macromolecular compounds obtained otherwise than by reactions involving only unsaturated carbon-to-carbon bonds
- D06P1/5285—Polyurethanes; Polyurea; Polyguanides
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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
- D06P5/00—Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form
- D06P5/003—Transfer printing
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- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
The application provides a bronzing glue and a preparation method and application thereof, belonging to the treatment of fabrics and the like dyed or printed by textiles by using nitrogen-containing compounds according to the classification of dyes, pigments or auxiliaries. 30-40% of main rubber, 10-15% of curing agent, 20-30% of brightener, 15-20% of organic solvent and 2-5% of accelerator; the main adhesive is composed of polyurethane resin A and polyurethane resin B, wherein the polyurethane resin A is solvent polyurethane containing isocyanate groups, the polyurethane resin B is water-based polyurethane containing no isocyanate, and the mass ratio of the polyurethane resin A to the polyurethane resin B is (5-8): 5-2; the curing agent adopts organic amine compounds. The application is applied to a gold stamping process, and has the advantages of good adhesion force, various applicable base materials and the like, the finished product has strong brightness, friction fastness and washing fastness, and the piece difference of the finished product is controlled to be (300-400) meters.
Description
Technical Field
The application relates to a bronzing glue and a preparation method and application thereof, belonging to the technical field of treatment of fabrics and the like for textile dyeing or printing by using nitrogen-containing compounds according to the classification of dyes, pigments or auxiliaries.
Background
The gilding technology for textile is a special printing technology in which a layer of resin film is coated on a base material, and then the resin film is attached to gilding paper under the action of high temperature and high pressure to form metallic luster on the base material. Similar to disperse dye heat transfer printing, the metal layer on the gold stamping paper is transferred to the base material by utilizing the heat transfer principle, and the metal layer can have gold, silver, laser, black and other colors. Once the gold stamping fabric with high added value and low cost is put into the market, the gold stamping fabric is sought after by the consumers. As one skilled in the art, after seeing the prosperous market, the quality of the product itself is more concerned. At present, the common problems of the gold stamping fabrics on the market include poor fastness to washing, poor fastness to rubbing, serious color difference, insecure bonding force between a metal layer and the fabrics, doubtful environmental protection of products and the like, but the problems are not effectively solved, so that the gold stamping products are limited to be in a high-end market.
The technical personnel in the field continuously develop new solutions and new routes to try to solve the problems faced by the gold stamping products, and the specific summary is as follows:
CN 104263311B discloses a preparation process of UV cold-hot stamping glue, which has excellent adhesive force to a vacuum coating and simplifies the production process of a cold-hot film.
CN 103709839A discloses a gold stamping glue solution, a preparation method thereof and application of titanium dioxide in the gold stamping glue solution, and the preparation method is thought to improve the stability of products and improve the firmness and the flatness of gold stamping films.
CN 103306143A discloses a gold stamping glue solution and a gold stamping method using the same, and the gold stamping glue solution is considered to be bright, smooth and clear in pattern, so that the process is improved, a transfer printing technology is adopted, two screen printing processes are omitted, and the manufacturing cost is accelerated.
CN 103224756A discloses a method for developing glue for gold stamping printing, which can effectively solve the problems of irregular edges, insufficient brightness, missed burning and the like caused by cold stamping transfer printing due to the glue.
The above applications have been started from different angles and respective solutions have been proposed. By comprehensively analyzing the technical routes, the rough direction of developing the novel gold stamping glue and the improved gold stamping process can be found, but the specific applicable objects are different, so that each scheme can only be used for processing a single object and cannot be widely applied. In a specific production practice, a plurality of technical difficulties are usually encountered: firstly, the adhesive force between the glue solution of the original formula and the fabric is poor and the firmness is low; secondly, the glue solution in the original formula is only suitable for polyester non-elastic woven fabric, and the base material has large limitation; thirdly, the product adopting the glue solution of the original formula has weak luster, poor color fastness grade and poor bright light durability; and fourthly, the glue solution of the original formula is adopted, so that the finished product has large difference and unstable product quality. The problems in the current production practice can not be well solved by adopting the prior technical scheme, and the expected value of the product can not be reached.
Disclosure of Invention
In view of the above, in order to overcome the defects of poor adhesion between the virgin rubber and the substrate, low transparency, low fastness, single applicable object and the like in the prior art, the application firstly provides the bronzing rubber which has strong adhesion, wide applicable object and good production stability.
Specifically, the method is realized through the following scheme:
the bronzing glue comprises the following components in percentage by mass:
30-40% of main rubber, 10-15% of curing agent, 20-30% of brightener, 15-20% of organic solvent and 2-5% of accelerator; the main adhesive is composed of two components of polyurethane resin A and polyurethane resin B, wherein the polyurethane resin A is solvent type polyurethane containing isocyanate groups, and the main component of the main adhesive is any one of toluene diisocyanate, polymethylene polyphenyl polyisocyanate, 1, 6-hexamethylene diisocyanate, 1, 5-naphthalene diisocyanate and xylylene diisocyanate; the polyurethane resin B is water-based polyurethane, does not contain isocyanate, contains active functional groups such as amino ester bond, hydroxyl, carboxyl and the like, and can be a mixture of any two or more of polyol, isocyanate, acrylate, vinyl acetate and the like as main components.
In the main rubber, the mass ratio of the polyurethane resin A to the polyurethane resin B is (5-8) to (5-2).
At the same time, the applicant has also surprisingly found that: the two components of the polyurethane resin A and the polyurethane resin B are blended into the blending colloid system, and the reflected adhesive force, film forming fastness and transmission brightness are all larger than those of a single-component glue solution. In addition, the strong hydrogen bond combination is formed by fully utilizing the isocyanate group, the polyhydroxy group and the polycarboxyl in the polyurethane, the ester group in the terylene and the hydroxyl in the cellulose fiber, so that the bonding force with the base material is greatly enhanced. The hot stamping glue can be widely applied to most of fabrics on the market.
The curing agent is organic amine and can be one or more of xylylenediamine, m-phenylenediamine, hydroxyethyl ethylenediamine, hexamethylene diamine 2-methylimidazole and triisopropanol tert-amine titanate.
The curing agents used are commercially available, have low toxicity, and can be cured at room temperature and medium temperature.
The brightening agent can be one or a mixture of dibutyltin dilaurate, triethanolamine, dimethylethanol, ethanolamine and the like. The catalyst mainly plays a role in catalyzing, so that the polyurethane film and the gold stamping film react, and the metal layer on the gold stamping film is accelerated to be transferred onto the polyurethane film, thereby enhancing the metallic luster performance of a finished product.
The brightener is a conventional chemical product, has low price and can stably exist in a blending colloid system.
The promoter is one or more of phenol promoter, fatty amine promoter, pyridine promoter and triethanolamine promoter. The preferable amount is (3-4)%, so as to reduce the curing temperature and accelerate the curing speed.
The organic solvent is one of toluene, ethyl acetate, acetone and butanone. Preferably, butanone is selected as the organic solvent, the boiling point of the butanone is 80 ℃, the solubility parameter is 9.2, the boiling point of the blending glue solution can be effectively improved, and the piece difference of a finished product is controlled to be (300-400) meters.
The polyurethane resin is added in the formula, so that the adhesive force of the polyurethane resin is fully utilized, and the problems that the conventional bronzing adhesive has poor adhesive force to a base material and is single in applicable base material are solved; meanwhile, the ratio of each component of the gold stamping glue is adjusted, so that the brightness, the rubbing fastness, the washing fastness and the like of a finished product can be effectively enhanced, and the difference of the bonding force caused by the difference of the bonding effects of different substrates is met; the organic solvent and other components of the bronzing glue are mutually soluble, so that the tolerance of a finished product can be controlled to be 300-400 meters, and continuous production is guaranteed.
Meanwhile, the applicant also provides a preparation method of the gold stamping glue, which comprises the following specific steps:
(1) sampling the polyurethane resin A and the polyurethane resin B according to the mass ratio of (5-8) to (5-2), and uniformly stirring at the stirring speed of 400-600 r/min at the temperature of 20-30 ℃ for 8-15 min;
(2) adding the curing agent in a corresponding proportion, and continuously stirring for 3-8 min until the curing agent is uniformly mixed;
(3) adding brightener in a corresponding proportion, increasing the stirring speed to 650-850 r/min, stirring for 8-15 min, and stirring at constant temperature;
(4) and (3) adding the accelerator and the organic solvent in corresponding proportion, and stirring for 10-18 min until the mixture is uniformly mixed to obtain the gilding glue, wherein the viscosity of the gilding glue is (58-65) CPS.
Meanwhile, the application also provides a gold stamping process applying the gold stamping glue, which comprises the following specific steps:
(1) gluing the base cloth to be treated by a rolling coating method, wherein the gluing pressure is 5-10 kg, and the mesh number of the screen printing plate is 100-200; preferably, the sizing pressure in step (1) is (5.5-7) kg, such as 5.5kg, 6kg, 6.5kg, 7 kg; the mesh number of the screen printing plates is (150-180), such as 150, 160, 170 and 180. The roll coating method is that a roller is firstly immersed into prepared glue solution and then is contacted with base cloth, and the glue is uniformly applied, so that the roll coating method is suitable for large-scale production.
(2) And (3) uniformly feeding the base cloth which is uniformly glued into an oven, setting the temperature at 45-55 ℃, and drying at the speed of 500 m/min.
(3) Attaching the base cloth treated in the step (2) and OPP gold stamping paper, placing the base cloth on a hot pressing roller, wherein the temperature of the hot pressing roller is 130-145 ℃, and rolling the base cloth under the pressure of 8-10 kg; preferably, the temperature of the hot press roll in the step (3) can be (135-145) ° c, such as: 135 ℃, 137 ℃, 140 ℃, 144 ℃ and the pressure can be (8-9.5) kg, such as: 8kg, 8.5kg, 9.0kg, 9.5 kg. The OPP bronzing paper is a transparent base material without aluminum plating or a medium plating or other post-processes.
(4) Feeding the rolled fabric into a constant-temperature drying room, wherein the temperature of the drying room is 45-60 ℃, and the treatment time is 24-60 hours; and (4) transferring to room temperature, standing and cooling for 3-8 h, and uniformly separating the base cloth and the gold stamping paper at the speed of 600-800 m/min to finish the gold stamping treatment of the base cloth.
The beneficial effect of this application has: firstly, the adhesive force and firmness of the polyurethane film as the main component of the bronzing adhesive and the fabric are enhanced by fully utilizing the constitutional characteristics of the bronzing adhesive; secondly, different bonding effects of the bronzing adhesive are realized through different proportions of the bronzing adhesive components, the application range of the bronzing adhesive is expanded, the bronzing adhesive is not limited to a single variety any more, and the bronzing adhesive can be more widely applied to different types of garment materials; thirdly, the finished fabric adopting the gold stamping glue has the characteristics of super-transparency and brightness, 4.0-level fastness to washing, 4.0-level fastness to dry and wet rubbing, lasting brightness and the like, the scheme gives full play to the performances of the gold stamping glue solution, the gold stamping film and the gold stamping process, and the gold stamping fabric with reliable quality and high added value can be produced.
Detailed Description
The feasibility of the present application is further demonstrated below by means of specific examples, which are set forth as preferred aspects of the present application, and therefore, the present application is not limited thereto. Any person imitating or changing the technical scheme and the conception according to the present application shall fall within the protection scope of the present application.
Example 1: bronzing adhesive for all-cotton woven fabric base cloth
1. Preparation of bronzing glue
(1) Preparing 500 parts by weight of gilding glue, wherein the gilding glue comprises: 90 parts of polyurethane resin A, 60 parts of polyurethane resin B, 75 parts of curing agent, 150 parts of brightening agent, 25 parts of accelerator and 100 parts of organic solvent;
(2) putting polyurethane resin A and polyurethane resin B into a container with a stirring device, wherein the stirring speed is 600r/min, the stirring time is 10min, and the temperature is 20 ℃;
(3) adding 75 parts of curing agent into the step (2), continuously stirring for 5min, and uniformly mixing;
(4) adding 150 parts of brightener into the step (3), increasing the stirring speed to 700r/min, stirring for 10min, and keeping the temperature constant;
(5) and (4) adding 25 parts of accelerator and 100 parts of organic solvent into the step (4), prolonging the stirring time to 15min, and uniformly mixing to obtain a glue solution with the viscosity of 58 CPS.
2. Gold stamping process
(1) Gluing the base cloth by adopting a roll coating method, wherein the gluing pressure is 5kg, and the mesh number of the screen printing plate is 100;
(2) feeding the glued base cloth into an oven at a constant speed, wherein the temperature is 55 ℃, and the speed is 500 m/min;
(3) heating to 130 ℃ by a hot-pressing roller, attaching the base cloth coated with the film to OPP under the pressure of 8kg, and rolling for 300 meters;
(4) feeding the fabric which is rolled in the step (3) into a constant-temperature drying room at 55 ℃ for 48 hours; then standing and cooling for 6h at room temperature, and separating the base cloth and the bronzing paper at a constant speed of 700 m/min.
Example 2: gilding adhesive for polyester cotton woven fabric
1. Preparation of bronzing glue
(1) Preparing 500 parts by weight of gilding glue, wherein the gilding glue comprises: 121 parts of polyurethane resin A, 61 parts of polyurethane resin B, 70 parts of curing agent, 125 parts of brightener, 23 parts of accelerator and 100 parts of organic solvent;
(2) putting 121 parts of polyurethane resin A and 61 parts of polyurethane resin B into a container with a stirring device, wherein the stirring speed is 600r/min, the stirring time is 10min, and the temperature is 20 ℃;
(3) adding 70 parts of curing agent into the step (2), continuously stirring for 5min, and uniformly mixing;
(4) adding 125 parts of brightener into the step (3), increasing the stirring speed to 700r/min, stirring for 10min, and keeping the temperature constant;
(5) and (4) putting 23 parts of accelerator and 100 parts of organic solvent into the step (4), stirring for 15min, and uniformly mixing to obtain the bronzing adhesive, wherein the adhesive liquid viscosity is 63 CPS.
2. Gold stamping process
(1) Sizing the base cloth by adopting a roll coating method, wherein the sizing pressure is 8kg, and the mesh number of the screen printing plate is 150;
(2) feeding the glued base cloth into an oven at a constant speed, wherein the temperature is set at 50 ℃ and the speed is 500 m/min;
(3) heating to 135 ℃ by a hot-pressing roller, attaching the base cloth coated with the film to OPP under the pressure of 8kg, and rolling for 300 meters;
(4) feeding the fabric which is rolled in the step (3) into a constant-temperature drying room at 55 ℃ for 48 hours; then standing and cooling for 6h at room temperature, and separating the base cloth and the bronzing paper at a constant speed of 700 m/min.
Example 3: gilding adhesive for polyester tatting fabric
1. Preparation of bronzing glue
(1) Preparing 500 parts by weight of gilding glue, wherein the gilding glue comprises: 85 parts of polyurethane resin A, 85 parts of polyurethane resin B, 75 parts of curing agent, 140 parts of brightening agent, 15 parts of accelerant and 100 parts of organic solvent;
(2) putting 85 parts of polyurethane resin A and 85 parts of polyurethane resin B into a container with a stirring device, wherein the stirring speed is 600r/min, the stirring time is 10min, and the temperature is 20 ℃;
(3) adding 75 parts of curing agent into the step (2), continuously stirring for 5min, and uniformly mixing;
(4) adding 140 parts of brightener into the step (3), increasing the stirring speed to 700r/min, stirring for 10min, and keeping the temperature constant;
(5) and (4) putting 15 parts of accelerator and 100 parts of organic solvent into the step (4), stirring for 15min, and uniformly mixing to obtain the bronzing glue, wherein the glue solution viscosity is 60 CPS.
2. Gold stamping process
(1) Gluing the base cloth by adopting a roll coating method, wherein the gluing pressure is 10kg, and the mesh number of the screen printing plate is 200;
(2) feeding the glued base cloth into an oven at a constant speed, wherein the temperature is set at 45 ℃ and the speed is 500 m/min;
(3) heating to 140 ℃ by a hot-pressing roller, attaching the base cloth coated with the film to OPP under the pressure of 8kg, and rolling for 400 meters;
(4) feeding the fabric which is rolled in the step (3) into a constant-temperature drying room at 55 ℃ for 48 hours; then standing and cooling for 6h at room temperature, and separating the base cloth and the bronzing paper at a constant speed of 700 m/min.
Example 4: gilding adhesive for polyamide fabric
1. Preparation of bronzing glue
(1) Preparing 500 parts by weight of gilding glue, wherein the gilding glue comprises: 150 parts of polyurethane resin A, 50 parts of polyurethane resin B, 70 parts of curing agent, 130 parts of brightening agent, 25 parts of accelerator and 75 parts of organic solvent;
(2) putting 150 parts of polyurethane resin A and 50 parts of polyurethane resin B into a container with a stirring device, wherein the stirring speed is 400r/min, the stirring time is 15min, and the temperature is 30 ℃;
(3) adding 70 parts of curing agent into the step (2), continuously stirring for 8min, and uniformly mixing;
(4) adding 130 parts of brightener into the step (3), increasing the stirring speed to 650r/min, stirring for 15min, and keeping the constant temperature;
(5) and (4) putting 25 parts of accelerator and 75 parts of organic solvent into the step (4), stirring for 18min, and uniformly mixing to obtain the bronzing adhesive, wherein the adhesive liquid viscosity is 64 CPS.
2. Gold stamping process
(1) Sizing the base cloth by adopting a roll coating method, wherein the sizing pressure is 5.5kg, and the mesh number of the screen printing plate is 170;
(2) feeding the glued base cloth into an oven at a constant speed, wherein the temperature is 55 ℃, and the speed is 500 m/min;
(3) heating to 135 deg.C with hot-press roller, bonding the coated base fabric with OPP under 9.5kg pressure, and rolling for 400 m;
(4) feeding the fabric which is rolled in the step (3) into a constant-temperature drying room at 45 ℃ for 60 hours; then standing and cooling for 8h at room temperature, and separating the base cloth and the bronzing paper at a constant speed of 700 m/min.
Example 5: bronzing adhesive for cotton/nylon fabric
1. Preparation of bronzing glue
(1) Preparing 500 parts by weight of gilding glue, wherein the gilding glue comprises: 160 parts of polyurethane resin A, 40 parts of polyurethane resin B, 50 parts of curing agent, 150 parts of brightening agent, 10 parts of accelerant and 90 parts of organic solvent;
(2) putting 160 parts of polyurethane resin A and 40 parts of polyurethane resin B into a container with a stirring device, wherein the stirring speed is 400r/min, the stirring time is 8min, and the temperature is 25 ℃;
(3) adding 50 parts of curing agent into the step (2), continuously stirring for 3min, and uniformly mixing;
(4) adding 150 parts of brightener into the step (3), increasing the stirring speed to 850r/min, stirring for 8min, and keeping the temperature constant;
(5) and (4) putting 10 parts of accelerator and 90 parts of organic solvent into the step (4), stirring for 10min, and uniformly mixing to obtain the bronzing adhesive, wherein the adhesive liquid viscosity is 65 CPS.
2. Gold stamping process
(1) Gluing the base cloth by adopting a roll coating method, wherein the gluing pressure is 7kg, and the mesh number of the screen printing plate is 180;
(2) feeding the glued base cloth into an oven at a constant speed, wherein the temperature is set at 50 ℃ and the speed is 500 m/min;
(3) heating to 145 ℃ by a hot-pressing roller, attaching the base cloth coated with the film to OPP under the pressure of 10kg, and rolling for 300 meters;
(4) feeding the fabric which is rolled in the step (3) into a constant-temperature drying room at 60 ℃ for 24 hours; then standing and cooling for 3h at room temperature, and separating the base cloth and the bronzing paper at a constant speed of 700 m/min.
In the above case, as can be seen from comparison of examples 1 to 5, different gold stamping glue compositions have a relatively large influence on the fluidity, i.e., viscosity, of the gold stamping glue and various parameters of the gold stamping process due to the proportion of the polyurethane resin a and the polyurethane resin B and the proportion of other important components, specifically, the differences of the parameters such as the viscosity (58-68 CPS), the gluing pressure (5-10 kg), the hot-pressing temperature (135-145 ℃) and the like of the gold stamping glue are expressed, and for different fabrics/base fabrics, the use requirements of the different fabrics/base fabrics can be met by adjusting the composition proportion of the glue.
As represented by example 3, the composition of the polyurethane resin and the organic solvent were changed, and a comparison was made between the different schemes.
Comparative example 1
A bronzing adhesive was prepared by following the procedure of example 3 by replacing the polyurethane resin a and the polyurethane resin B of example 3 with a single polyurethane resin a (with the same total content) and the other components.
And gilding the polyester woven fabric according to the gilding process in the embodiment 3.
Comparative example 2
A bronzing adhesive was prepared by following the procedure of example 3 by replacing the polyurethane resin a and the polyurethane resin B of example 3 with a single polyurethane resin B (with the same total content) and the other components.
And gilding the polyester woven fabric according to the gilding process in the embodiment 3.
Comparative example 3
The organic solvent butanone of example 3 was replaced with ethyl acetate (the content was unchanged), and other components were unchanged, and a bronzing agent was prepared by the method of example 3.
And gilding the polyester fabric according to the gilding process in the embodiment 3.
The finished fabrics in example 3 and comparative examples 1, 2 and 3 were respectively subjected to performance tests, and the test results are shown in table 1.
TABLE 1 comparison table of product performances under different implementation conditions
Note: the test standards of the fastness to washing and the rubbing are American standard ATCC 135, and the test standards are obtained after the standard is washed for 20 times.
As can be seen from Table 1, compared with comparative examples 1 and 2, in example 3, the grades of the fastness to washing and the fastness to rubbing of the finished product of example 3 are higher than those of comparative examples 1 and 2, and it can be obtained from the results that the final performance of the single-component bronzing glue solution is weaker than that of the bronzing glue formed by the blending of polyurethane resin A and polyurethane resin B, and the superiority of the bronzing glue of the application is also reflected visually. The difference between the application of example 3 and comparative example 3 is the choice of organic solvent, and it can be seen from the final test results of the product that butanone is a good choice and is very helpful for improving the product performance.
Claims (10)
1. The bronzing adhesive is characterized by comprising the following components in percentage by weight: 30-40% of main rubber, 10-15% of curing agent, 20-30% of brightener, 15-20% of organic solvent and 2-5% of accelerator; the main adhesive is composed of polyurethane resin A and polyurethane resin B, wherein the polyurethane resin A is solvent polyurethane containing isocyanate groups, the polyurethane resin B is water-based polyurethane containing no isocyanate, and the mass ratio of the polyurethane resin A to the polyurethane resin B is (5-8): 5-2; the curing agent adopts organic amine compounds.
2. The bronzing adhesive according to claim 1, which is characterized in that: the polyurethane resin A is any one of toluene diisocyanate, polymethylene polyphenyl polyisocyanate, 1, 6-hexamethylene diisocyanate, 1, 5-naphthalene diisocyanate and xylylene diisocyanate, and the polyurethane resin B is a mixture of any two or more of polyol, isocyanate, acrylate and vinyl acetate.
3. The bronzing adhesive according to claim 1, which is characterized in that: the curing agent is one or more of xylylenediamine, m-phenylenediamine, hydroxyethyl ethylenediamine, hexamethylenediamine 2-methylimidazole and triisopropanol tert-amine titanate.
4. The bronzing adhesive according to claim 1, which is characterized in that: the brightener is one or a mixture of dibutyltin dilaurate, triethanolamine, dimethylethanol and ethanolamine.
5. The bronzing adhesive according to claim 1, which is characterized in that: the accelerant is one or more of phenol accelerant, fatty amine accelerant, pyridine accelerant and triethanolamine accelerant.
6. The bronzing adhesive according to claim 1, which is characterized in that: the organic solvent is one of toluene, ethyl acetate, acetone and butanone.
7. The preparation method of the bronzing glue is characterized by comprising the following steps:
(1) sampling the polyurethane resin A and the polyurethane resin B according to the mass ratio of (5-8) to (5-2), and uniformly stirring at the stirring speed of 400-600 r/min at the temperature of 20-30 ℃ for 8-15 min;
(2) adding the curing agent in a corresponding proportion, and continuously stirring for 3-8 min until the curing agent is uniformly mixed;
(3) adding brightener in a corresponding proportion, increasing the stirring speed to 650-850 r/min, stirring for 8-15 min, and stirring at constant temperature;
(4) adding an accelerator and an organic solvent in a corresponding proportion, and stirring (10-18) min until the mixture is uniformly mixed to obtain the bronzing glue as claimed in claims 1-6, wherein the viscosity of the bronzing glue is (58-65) CPS.
8. The application of the bronzing adhesive is characterized by comprising the following steps:
(1) the hot stamping glue according to any one of claims 1 to 6 is adopted, the base cloth to be treated is glued by a roll coating method, the gluing pressure is 5 to 10kg, and the mesh number of the screen printing plate is 100 to 200;
(2) feeding the base cloth subjected to sizing into an oven at a constant speed, and drying at the temperature of 45-55 ℃;
(3) attaching the base cloth treated in the step (2) and OPP gold stamping paper, placing the base cloth on a hot pressing roller, wherein the temperature of the hot pressing roller is 130-145 ℃, and rolling the base cloth under the pressure of 8-10 kg;
(4) feeding the rolled fabric into a constant-temperature drying room, wherein the temperature of the drying room is 45-60 ℃, and the treatment time is 24-60 hours; and (4) transferring to room temperature, standing and cooling for 3-8 h, and uniformly separating the base cloth and the gold stamping paper at the speed of 600-800 m/min to finish the gold stamping treatment of the base cloth.
9. Use of a bronzing agent according to claim 8, wherein: in the step (1), the gluing pressure is (5.5-7) kg, and the mesh number of the screen printing plate is (150-180).
10. Use of a bronzing agent according to claim 8, wherein: in the step (3), the temperature of the hot-pressing roller is 135-145 ℃ and the pressure is 8-9.5 kg.
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Citations (7)
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