阅读说明：本技术 增强烫金表面耐磨的uv胶印上光工艺 (UV offset printing glazing process for enhancing gold stamping surface abrasion resistance ) 是由 刘宇东 于 2020-04-01 设计创作，主要内容包括：本发明公开了增强烫金表面耐磨的UV胶印上光工艺,包括如下步骤：制油：预先制备UV胶印光油；清洁：去除包装承印物表面的杂质,备用；印水：在非烫金表面局部印刷弱酸性软化水；印油：烫金表面未被弱酸性软化水润湿的区域均匀的印刷UV胶印光油；固化：UV胶印光油在紫外线的照射下进行固化结膜,在烫金表面形成保护层。本发明的有益效果：本发明通过UV胶印工艺在烫金表面实现耐磨保护层,能够更有效控制油层厚度,节约成本,烫金表面耐磨性能增强,不容易出现擦伤、刮花或脱落的问题,且不影响原有金属效果,UV胶印光油应用光引发剂吸收能量,在紫外线照射下发生极速铰链反应,达到极速干燥的目的。(The invention discloses a UV offset printing glazing process for enhancing the wear resistance of a gold stamping surface, which comprises the following steps: preparing oil: preparing UV offset printing gloss oil in advance; cleaning: removing impurities on the surface of the packaging printing stock for later use; water printing: locally printing weak acid softened water on the non-gold-stamped surface; printing oil: uniformly printing UV offset printing gloss oil on the gold stamping surface in an area which is not wetted by weak acid softened water; and (3) curing: and curing the film under the irradiation of ultraviolet rays by using the UV offset printing gloss oil to form a protective layer on the gold stamping surface. The invention has the beneficial effects that: the invention realizes the wear-resistant protective layer on the gold stamping surface through the UV offset printing process, can more effectively control the thickness of the oil layer, saves the cost, enhances the wear-resistant performance of the gold stamping surface, is not easy to have the problems of scratching, scraping or falling off, and does not influence the original metal effect.)

1. A UV offset printing glazing process for enhancing the abrasion resistance of a gold stamping surface is characterized by comprising the following steps:

preparing oil: the UV offset printing gloss oil is prepared in advance and comprises the following components in percentage by weight: 45-65% of polyfunctional polyester acrylate; 3-15% of epoxy acrylic acid; 3-15% of polyester acrylate; 2-13% of reactive diluent; 1-15% of filler; 4-8% of a photoinitiator; 1-5% of an auxiliary agent;

cleaning: removing impurities on the surface of the packaging printing stock for later use;

water printing: locally printing weak acid softened water on the non-gold-stamped surface;

printing oil: uniformly printing UV offset printing gloss oil on the gold stamping surface in an area which is not wetted by weak acid softened water;

and (3) curing: and curing the film under the irradiation of ultraviolet rays by using the UV offset printing gloss oil to form a protective layer on the gold stamping surface.

2. The UV offset glazing process for enhancing the wear resistance of gold stamping surfaces as claimed in claim 1, wherein: in the oil preparation step, the UV offset printing gloss oil consists of the following components in percentage by weight: 45% of polyfunctional polyester acrylate; 3% of epoxy acrylic acid; 3% of polyester acrylate; 2% of reactive diluent; 1% of filler; 4% of a photoinitiator; 1% of auxiliary agent.

3. The UV offset glazing process for enhancing the wear resistance of gold stamping surfaces as claimed in claim 1, wherein: in the oil preparation step, the UV offset printing gloss oil consists of the following components in percentage by weight: 65% of polyfunctional polyester acrylate; 15% of epoxy acrylic acid; 15% of polyester acrylate; 13% of reactive diluent; 15% of filler; 8% of a photoinitiator; and 5% of an auxiliary agent.

4. The UV offset glazing process with enhanced abrasion resistance of the bronzing surfaces according to any one of claims 1 to 3, wherein: the preparation steps of the UV offset printing gloss oil are as follows:

a. mixing and uniformly stirring polyfunctional polyester acrylate, epoxy acrylate, polyester acrylate and reactive diluent according to a proportion to obtain a basic mixture body;

b. grinding the basic mixture until the fineness is 3-10 microns;

c. heating the photoinitiator to fully dissolve, adding the photoinitiator, the filler and the auxiliary agent into the basic mixture according to the proportion, and continuously stirring for more than 30 minutes to obtain the finished product of the offset printing gloss oil.

5. The UV offset glazing process for enhancing the wear resistance of gold stamping surfaces as claimed in claim 1, wherein: in the step of printing water, the pH value of the weakly acidic softened water is 4.5-6.0.

6. The UV offset glazing process for enhancing the wear resistance of gold stamping surfaces as claimed in claim 1, wherein: in the step of printing ink, a connecting agent is pre-coated on the gold stamping surface before the printing ink, and the connecting agent is acrylate water-soluble mixed liquor or polyurethane water-soluble mixed liquor.

7. The UV offset glazing process for enhancing the wear resistance of gold stamping surfaces as claimed in claim 1, wherein: in the curing step, the wavelength range of ultraviolet rays is 320-400 nanometers, and a photoinitiator component contained in the UV offset printing gloss oil absorbs the energy of the ultraviolet rays for curing to form a protective layer with thickness on the gold stamping surface.

8. The UV offset glazing process with enhanced abrasion resistance of the bronzing surface according to claim 1 or 4, wherein: the thickness of the protective layer is 0.1-2 microns.

9. The UV offset glazing process for enhancing the wear resistance of gold stamping surfaces as claimed in claim 1, wherein: the filler is a mixture of light magnesium carbonate, wax powder and double-end hydroxyl polyether modified silicone oil.

10. The UV offset glazing process with enhanced abrasion resistance of the bronzing surface according to claim 1 or 7, wherein: the photoinitiator is one or a mixture of 2, 4-diethyl thioxanthone, 1-hydroxycyclohexyl phenyl ketone and 2,4, 6-trimethyl benzoyl ethyl phosphonate.

Technical Field

The invention relates to the technical field of UV offset printing glazing treatment on a gold stamping surface, in particular to a UV offset printing glazing process for enhancing the wear resistance of the gold stamping surface.

Background

In the printing and packaging industry, the gold stamping process is often used as a main process for highlighting brands and product grades, and the gold stamping materials comprise: paper, adhesive, plastic film, glass, metal, wood, cloth, leather, etc. Since the gold stamped surface is exposed to the outermost surface of various packages, problems such as scratches, and peeling are very likely to occur. In order to solve the technical problem, a protective layer is coated on the gold stamping surface in the prior art, and the protective layer has the following defects in a coating mode: 1) there is no way to effectively control the thickness of the protective layer, 2) the arrangement of the protective layer may affect the original metal effect, and 3) the protective layer is easy to peel off after a period of use.

Therefore, in order to solve the technical problems, the invention provides the UV offset printing glazing process for enhancing the wear resistance of the gold stamping surface, the wear-resistant protective layer is realized on the gold stamping surface through the UV offset printing process, the thickness of the oil layer can be more effectively controlled, the cost is saved, the wear resistance of the gold stamping surface is enhanced, the problems of scratching, scraping or falling off are not easy to occur, and the original metal effect is not influenced.

Disclosure of Invention

The invention provides a UV offset printing glazing process for enhancing the abrasion resistance of a gold stamping surface, which comprises the following steps:

preparing oil: the UV offset printing gloss oil is prepared in advance and comprises the following components in percentage by weight: 45-65% of polyfunctional polyester acrylate; 3-15% of epoxy acrylic acid; 3-15% of polyester acrylate; 2-13% of reactive diluent; 1-15% of filler; 4-8% of a photoinitiator; 1-5% of an auxiliary agent;

cleaning: removing impurities on the surface of the packaging printing stock for later use;

water printing: locally printing weak acid softened water on the non-gold-stamped surface;

printing oil: uniformly printing UV offset printing gloss oil on the gold stamping surface in an area which is not wetted by weak acid softened water;

and (3) curing: and curing the film under the irradiation of ultraviolet rays by using the UV offset printing gloss oil to form a protective layer on the gold stamping surface.

By adopting the technical scheme, in the oil preparation step, the UV offset printing gloss oil consists of the following components in percentage by weight: 45% of polyfunctional polyester acrylate; 3% of epoxy acrylic acid; 3% of polyester acrylate; 2% of reactive diluent; 1% of filler; 4% of a photoinitiator; 1% of auxiliary agent.

By adopting the technical scheme, in the oil preparation step, the UV offset printing gloss oil consists of the following components in percentage by weight: 65% of polyfunctional polyester acrylate; 15% of epoxy acrylic acid; 15% of polyester acrylate; 13% of reactive diluent; 15% of filler; 8% of a photoinitiator; and 5% of an auxiliary agent.

By adopting the technical scheme, the device is characterized in that: the preparation steps of the UV offset printing gloss oil are as follows:

a. mixing and uniformly stirring polyfunctional polyester acrylate, epoxy acrylate, polyester acrylate and reactive diluent according to a proportion to obtain a basic mixture body;

b. grinding the basic mixture until the fineness is 3-10 microns;

c. heating the photoinitiator to fully dissolve, adding the photoinitiator, the filler and the auxiliary agent into the basic mixture according to the proportion, and continuously stirring for more than 30 minutes to obtain the finished product of the offset printing gloss oil.

By adopting the technical scheme, in the step of printing water, the pH value of the weakly acidic softened water is 4.5-6.0.

By adopting the technical scheme, in the step of printing ink, the gold stamping surface is pre-coated with a connecting agent before printing ink, and the connecting agent is acrylate water-soluble mixed solution or polyurethane water-soluble mixed solution.

By adopting the technical scheme, in the curing step, the wavelength range of ultraviolet rays is 320-400 nanometers, and the photoinitiator component contained in the UV offset printing gloss oil absorbs the energy of the ultraviolet rays for curing, so that a protective layer with thickness is formed on the gold stamping surface.

By adopting the technical scheme, the thickness of the protective layer is 0.1-2 microns.

By adopting the technical scheme, the filler is a mixture of light magnesium carbonate, wax powder and double-end hydroxyl polyether modified silicone oil.

By adopting the technical scheme, the photoinitiator is one or a mixture of 2, 4-diethyl thioxanthone, 1-hydroxycyclohexyl phenyl ketone and 2,4, 6-trimethyl benzoyl ethyl phosphonate.

The invention has the beneficial effects that:

1. the gold stamping surface of the invention has enhanced wear resistance, is not easy to have the problems of scratching, scraping or falling off, has obviously prolonged service life, and does not influence the original metal effect;

2. the wear-resistant protective layer is formed on the gold stamping surface through the UV offset printing process, and compared with the traditional coating mode, the wear-resistant protective layer can more effectively control the thickness of the oil layer and save the cost;

3. the UV offset printing gloss oil used by the invention contains a specific photoinitiator, and generates a very fast hinge reaction under the irradiation of ultraviolet rays, thereby achieving the purpose of drying the gloss oil at a very fast speed;

4. according to the invention, the connecting agent is pre-coated on the gold stamping surface, so that the interlayer binding force between the UV offset printing gloss oil and the gold stamping surface can be ensured;

5. after the wear-resisting property of the gold stamping surface is enhanced, the use of a protective film can be saved, the environment is protected, and the working efficiency of a packaging production line of packaging box products is higher.

Drawings

Fig. 1 is a process flow diagram of a UV offset glazing process for enhancing the wear resistance of a gold stamping surface according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

On the contrary, the invention is intended to cover alternatives, modifications, equivalents and alternatives which may be included within the spirit and scope of the invention as defined by the appended claims. Furthermore, in the following detailed description of the present invention, certain specific details are set forth in order to provide a better understanding of the present invention. It will be apparent to one skilled in the art that the present invention may be practiced without these specific details.