阅读说明：本技术 一种高亮度、高牢度银粉印花浆及印花工艺 (High-brightness and high-fastness silver powder printing paste and printing process ) 是由 于志辉 房宽峻 贺佩芝 刘珍珍 赵亚茹 高志超 武飞 张胜 张凯凯 袁树帅 朱子 于 2019-11-27 设计创作，主要内容包括：本发明提供了一种高亮度、高牢度银粉印花浆,包括银粉浆及印花辅助浆。其中,银粉浆包括：银粉,粘合剂,抗氧化剂,助印剂,增稠剂等组成。印花辅助浆包括：有机高分子成膜剂,高分子助膜剂,增稠剂,高分子交联剂等组成。还提供了该银粉印花浆的印花工艺,包括以下步骤：根据花型及工艺要求制作银粉浆印花网版和印花辅助浆印花网版,其中银粉浆印花网版感光胶涂层为两层,且两个印花网版花型一致,为了保证罩印花型边缘清晰和较好的辅助效果,印花辅助浆印花网版花型大小比银粉浆印花网版稍小,采用圆网印花机先印银粉浆,再罩印印花辅助浆。本发明使用上述银粉印花浆及经过上述工艺,能够明显提高银粉印花亮度、亮度持久性以及耐粘牢度。(The invention provides a high-brightness and high-fastness silver powder printing paste, which comprises a silver powder paste and a printing auxiliary paste. Wherein, the silver paste includes: silver powder, adhesive, antioxidant, printing assistant, thickener, etc. The printing auxiliary paste comprises: organic macromolecular film-forming agent, macromolecular film-aid agent, thickening agent and macromolecular cross-linking agent. Also provides a printing process of the silver powder printing paste, which comprises the following steps: the method comprises the steps of manufacturing a silver paste printing screen and a printing auxiliary paste printing screen according to patterns and process requirements, wherein the photosensitive glue coating of the silver paste printing screen is two layers, the patterns of the two printing screens are consistent, in order to ensure the clear edge of the overprint pattern and better auxiliary effect, the size of the printing auxiliary paste printing screen is slightly smaller than that of the silver paste printing screen, and the silver paste is printed firstly by a circular screen printer and then the printing auxiliary paste is overprinted. By using the silver powder printing paste and the process, the brightness durability and the sticking resistance fastness of the silver powder printing can be obviously improved.)

1. A high-brightness high-fastness silver powder printing paste is characterized in that the silver powder printing paste is prepared according to the brightness and fastness requirements of a silver powder pattern, and comprises silver powder paste and printing auxiliary paste; the silver paste comprises the following components in percentage by weight: 10-13% of silver powder, 35-45% of adhesive, 0.2-1% of antioxidant, 2-4% of printing aid, 1.5-2% of thickening agent and the balance of water; the printing auxiliary paste comprises: 8-10% of organic polymer film forming agent, 8-10% of polymer film aid agent, 1.5-2% of thickening agent, 0.1-0.5% of polymer cross-linking agent and the balance of water.

2. The high brightness and high fastness silver powder printing paste according to claim 1, wherein the silver powder is one or more of 400 mesh silver powder, 600 mesh silver powder, 800 mesh silver powder and 1000 mesh silver powder.

3. The high brightness and high fastness silver powder printing paste according to claim 1, wherein the binder is one or more of polyacrylate type binder and polyurethane type binder.

4. The high brightness and high fastness silver powder printing paste according to claim 1, wherein the printing assistant is one or more of a polymeric dispersant, a high efficiency penetrating agent, a humectant, an anti-drying agent and propylene glycol.

5. The silver powder printing paste of claim 1, wherein said organic polymer film former is an acrylic resin film former, a polymer obtained by copolymerizing acrylic acid-based vinyl derivatives.

6. The silver powder printing paste with high brightness and high fastness according to claim 1, wherein the polymer filming aid is one or more of polymer waterborne polyurethane, transparent waterborne polyacrylate, modified siloxane, humectant and anti-drying agent.

7. A high-brightness and high-fastness silver powder printing process is characterized by comprising the following steps:

(1) manufacturing a silver powder paste printing screen plate and a printing auxiliary paste printing screen plate according to the pattern and the process requirements;

(2) printing silver powder paste by a rotary screen printing machine, and then overprinting printing auxiliary paste;

(3) drying, baking, steaming, washing and tentering;

(4) the temperature is 130 ℃ and 140 ℃, and the pressure is 4-6 MPa.

8. The silver powder printing process with high brightness and high fastness according to claim 7, wherein the manufacturing of the silver paste printing screen plate comprises the following steps:

(1) uniformly coating a first layer of photosensitive glue on the outer surface of a 60-mesh screen plate, wherein the thickness is 20-35 mu m, drying at 30-45 ℃ for 3-5 minutes, exposing and developing;

(2) and uniformly coating a second layer of photosensitive glue on the outer surface of the screen printing plate, wherein the thickness is 20-35 mu m, drying at the temperature of 30-45 ℃ for 3-5 minutes, exposing, developing and repairing the screen printing plate.

9. The silver powder printing process with high brightness and high fastness according to claim 7, wherein the pattern of the silver paste printing screen is the same as that of the printing auxiliary paste printing screen, and the pattern size of the printing auxiliary paste printing screen is 1-2mm smaller than that of the silver paste printing screen.

10. The silver powder printing process with high brightness and high fastness according to claim 7, wherein the mesh number of the printing auxiliary paste printing screen is one of 60 meshes, 80 meshes and 100 meshes.

Technical Field

The invention relates to the technical field of textile dyeing and finishing, in particular to silver powder printing paste with high brightness and high fastness and a printing process.

Background

Silver powder printing is a common printing technology, and silver powder, a binder and other auxiliaries are mixed and printed on a fabric to form a silver flashing effect. The silver powder is generally obtained by specially processing metal aluminum and is easy to be oxidized to lose metal luster, so that the brightness of the pattern part of the silver powder is very easy to reduce and darken in the processes of preparing silver powder printing paste, printing, washing and tentering, the bonding fastness of the silver powder and fibers is directly influenced, especially, the printing fastness, especially the bonding fastness to be adhered of the silver powder is reduced after calendaring, and the silver powder is easy to fall off under the action of external force. After the silver powder printed fabric is integrally tested, a 12.5 cm-7.8 cm trademark needs to be attached by using a labeling machine and is packaged and transported to Africa, and a large amount of silver powder is attached to the trademark when the trademark is torn off due to poor adhesion resistance of the silver powder, so that the product is damaged. In addition, when the silver powder printed fabric is transported to Africa, the silver powder printed fabric is easy to oxidize in the long-time storage process, so that the brightness is reduced, and the brightness durability is poor.

Disclosure of Invention

The invention aims to provide silver powder printing paste and a printing process, which are used for solving the problems of poor brightness, poor brightness durability and poor fastness of the existing silver powder printing process products.

The invention provides a high-brightness and high-fastness silver powder printing paste, which comprises a silver powder paste and a printing auxiliary paste. The silver paste comprises the following components in percentage by weight: 10-13% of silver powder, 35-45% of adhesive, 0.2-1% of antioxidant, 2-4% of printing aid, 1.5-2% of thickening agent and the balance of water. The printing auxiliary paste comprises: 8-10% of organic polymer film forming agent, 8-10% of polymer film aid agent, 1.5-2% of thickening agent, 0.1-0.5% of polymer cross-linking agent and the balance of water.

Preferably, the silver powder is one or more of 400-mesh silver powder, 600-mesh silver powder, 800-mesh silver powder and 1000-mesh silver powder, and the net penetrating property, uniformity and brightness of silver powder printing are improved.

Preferably, the adhesive is one or more of polyacrylate adhesive and polyurethane adhesive, and the brightness durability and the fastness of silver powder printing are improved.

Preferably, the printing aid is one or more of a polymer dispersant, a high-efficiency penetrating agent, a humectant, an anti-drying agent and propylene glycol. The printing performance of silver powder printing is improved, the screen penetrating performance of printing paste is improved, and the problem of screen blocking in the printing process is solved.

Preferably, the organic polymer film-forming agent is an acrylic resin film-forming agent, a polymer obtained by multi-copolymerizing vinyl derivatives based on acrylic acid. The brightness, the brightness durability, the sticking fastness and other performances of the silver powder printing are improved.

Preferably, the polymer film aid is one or more of polymer waterborne polyurethane, transparent waterborne polyacrylate, modified siloxane, a humectant and an anti-drying agent. The printing performance is improved, and the brightness, the brightness durability, the bonding fastness and other performances of the silver powder printing are improved.

The invention also provides a high-brightness and high-fastness silver powder printing process, and the high-brightness and high-fastness silver powder printing paste of the technical scheme is utilized to print the fabric. The process comprises the following steps:

(1) manufacturing a silver powder paste printing screen plate and a printing auxiliary paste printing screen plate according to the pattern and the process requirements;

(2) printing silver powder paste by a rotary screen printing machine, and then overprinting printing auxiliary paste;

(3) drying, baking, steaming, washing and tentering;

(4) and (3) calendering: the temperature is 130 ℃ and 140 ℃, and the pressure is 4-6 MPa.

Preferably, the manufacturing steps of the silver paste printing screen in the step (1) are as follows: step one, uniformly coating a first layer of photosensitive glue on the outer surface of a 60-mesh screen plate, then drying for 3-5 minutes at 30-45 ℃, exposing and developing; and step two, uniformly coating a second layer of photosensitive glue on the outer surface of the screen printing plate, drying for 3-5 minutes at the temperature of 30-45 ℃, exposing, developing and repairing the screen printing plate. The mesh number of the screen is 60 meshes, and the screen penetration amount of the color paste is increased; the photosensitive resist coating is two layers, the thickness of the coating is increased, the color paste can permeate the screen, the thickness of the silver powder paste adhered to the fabric is increased, and the printing brightness of the silver powder can be improved.

Preferably, in the step (1), the silver paste printing screen is manufactured, the thickness of the first layer of photosensitive glue is 20-35 μm, the thickness of the second layer of photosensitive glue is 20-35 μm, and the two layers of coatings are coated to increase the thickness of the coatings, so that the color paste can penetrate through the screen and the printing brightness of the silver powder can be improved.

Preferably, in the step (1), the patterns of the silver paste printing screen and the printing auxiliary paste printing screen are consistent, and in order to ensure the edge of the overprinting pattern to be clear and a better auxiliary effect, the size of the pattern of the printing auxiliary paste printing screen is 1-2mm smaller than that of the silver paste printing screen, so that the brightness, the durability, the sticking resistance and other properties of the printing pattern are improved while the definition of the pattern is ensured.

Preferably, in the step (4), the calendering temperature is 130-.

The invention has the advantages of

By adopting the silver powder printing paste and the printing process provided by the technical scheme, the obtained fabric printed with silver powder patterns can obviously improve the printing brightness, brightness durability and sticking resistance fastness of silver powder, so that the silver powder is firmly combined with fibers and is not easy to fall off under external force, and the quality of silver powder printed products is improved.

Drawings

FIG. 1 is a graph showing the effect of measuring the fastness to adhesion of silver powder printing.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below by examples.

The invention provides a high-brightness and high-fastness silver powder printing paste, which comprises a silver powder paste and a printing auxiliary paste. The silver paste comprises the following components in percentage by weight: 10-13% of silver powder, 35-45% of adhesive, 0.2-1% of antioxidant, 2-4% of printing aid, 1.5-2% of thickening agent and the balance of water. The printing auxiliary paste comprises: 8-10% of organic polymer film forming agent, 8-10% of polymer film aid agent, 1.5-2% of thickening agent, 0.1-0.5% of polymer cross-linking agent and the balance of water.

Preferably, the silver powder is one or more of 400-mesh silver powder, 600-mesh silver powder, 800-mesh silver powder and 1000-mesh silver powder, and the net penetrating property, uniformity and brightness of silver powder printing are improved.

Preferably, the adhesive is one or more of polyacrylate adhesive and polyurethane adhesive, and the brightness durability and the fastness of silver powder printing are improved.

Preferably, the printing aid is one or more of a polymer dispersant, a high-efficiency penetrating agent, a humectant, an anti-drying agent and propylene glycol. The printing performance of silver powder printing is improved, the screen penetrating performance of printing paste is improved, and the problem of screen blocking in the printing process is solved.

Preferably, the polymer film aid is one or more of polymer waterborne polyurethane, transparent waterborne polyacrylate, modified siloxane, a humectant and an anti-drying agent. The printing performance is improved, and the brightness, the brightness durability, the bonding fastness and other performances of the silver powder printing are improved.

Preferably, the organic polymer film-forming agent is an acrylic resin film-forming agent, a polymer obtained by multi-copolymerizing vinyl derivatives based on acrylic acid. The brightness, the brightness durability, the sticking fastness and other performances of the silver powder printing are improved.

The invention also provides a high-brightness and high-fastness silver powder printing process, and the high-brightness and high-fastness silver powder printing paste of the technical scheme is utilized to print the fabric. The process comprises the following steps:

(1) manufacturing a silver powder paste printing screen plate and a printing auxiliary paste printing screen plate according to the pattern and the process requirements;

(2) printing silver powder paste by a rotary screen printing machine, and then overprinting printing auxiliary paste;

(3) drying, baking, steaming, washing and tentering;

(4) and (3) calendering: the temperature is 130 ℃ and 140 ℃, and the pressure is 4-6 MPa.

Preferably, the manufacturing steps of the silver paste printing screen in the step (1) are as follows: step one, uniformly coating a first layer of photosensitive glue on the outer surface of a 60-mesh screen plate, then drying for 3-5 minutes at 30-45 ℃, exposing and developing; and step two, uniformly coating a second layer of photosensitive glue on the outer surface of the screen printing plate, drying for 3-5 minutes at the temperature of 30-45 ℃, exposing, developing and repairing the screen printing plate. The mesh number of the screen is 60 meshes, and the screen penetration amount of the color paste is increased; the photosensitive resist coating is two layers, the thickness of the coating is increased, the color paste can permeate the screen, the thickness of the silver powder paste adhered to the fabric is increased, and the printing brightness of the silver powder can be improved.

Preferably, in the step (1), the silver paste printing screen is manufactured, the thickness of the first layer of photosensitive glue is 20-35 μm, the thickness of the second layer of photosensitive glue is 20-35 μm, and the two layers of coatings are coated to increase the thickness of the coatings, so that color paste can penetrate through the screen and the printing brightness of silver powder can be improved;

preferably, in the step (1), the patterns of the silver paste printing screen and the printing auxiliary paste printing screen are consistent, and in order to ensure the edge of the overprinting pattern to be clear and a better auxiliary effect, the size of the pattern of the printing auxiliary paste printing screen is 1-2mm smaller than that of the silver paste printing screen, so that the brightness, the durability, the sticking resistance and other properties of the printing pattern are improved while the definition of the pattern is ensured.

Preferably, in the step (4), the calendering temperature is 130-.

The silver powder printed fabric detection item and the method comprise the following steps:

and (3) brightness detection: the test is carried out by adopting an Ailantai color measuring instrument i7800, a D65 light source is selected, an observation angle of 10 degrees is used for measurement, L values are used for representing the printing brightness of the silver powder, and the higher the value is, the brighter the printing of the silver powder is, and the darker the printing of the silver powder is. And testing different parts of the pattern of each silver powder sample for 6 times, and taking the average value of the 6 tests to obtain the printing brightness of the silver powder sample.

And (3) detecting the printing brightness durability of the silver powder: placing the silver powder printed fabric in a steamer at 102 ℃ for 4h, 8h and 12h, testing the brightness value of the silver powder printed fabric placed in different time periods, and further testing the brightness durability of the silver powder printed fabric.

And (3) detecting the sticking resistance fastness: folding and putting the pattern of the silver powder printed fabric outward, sticking a 12.5 cm-7.8 cm trademark on the pattern, pressing the trademark with a 10KG cuboid weight above the pattern, placing the pattern in a constant temperature and humidity chamber for 24 hours, tearing the pattern, and evaluating the sticking resistance according to the amount of silver powder stuck on the trademark.