Printing process based on metal coating and application thereof

Abstract

The invention relates to a printing process based on a metal coating, and relates to the technical field of textiles. The printing process comprises the following steps: metal coating: performing pretreatment, cloth inspection and coiling on a base material to be printed, and performing metal coating by using a metal target material under a vacuum condition to obtain a base material coated with a titanium-aluminum film; and printing: carrying out heat transfer printing on the base material plated with the titanium-aluminum film, and rolling to obtain the metalized printing base material. According to the printing technology, washing and drying procedures in the original technological process can be omitted, the original metal color effect of a metal coating film is reserved in the non-printing area of the base material, and in the printing area, printing patterns and the metal feeling are achieved, and the metallization effect of the patterns can be highlighted; in addition, after metal coating is conducted firstly, the bottom face of the base material is metal gray, then heat transfer printing is conducted, patterns permeate through the bottom face of the base material and cover the metal gray, the two faces of the printed base material can be used, the attractiveness is improved, and the base material is endowed with a new use function.

Description

Technical Field

[0001] The invention relates to the field of textile technology, in particular to a printing process based on metal plating and application thereof. Background Art

[0002] The current process of printing metal titanium-plated fabrics is mostly to first print, then metal-plated, and then processed and finished, and finally form metal titanium printed fabrics. Among them, the printing process mostly uses thermal transfer printing, and the process is roughly as follows: computer drawing → determine the pattern → print on paper → color adjustment → continuous printing → paper printing is completed → cloth washing → drying → cloth inspection → heat transfer machine → rolling → completion. The metal titanium plating steps can be roughly divided into 6 processes: washing printed cloth → drying → printed cloth inspection → loading on machine → vacuuming → metal titanium plating → plating completion.

[0003] However, in the printed fabric prepared by the above process, the metal film layer completely covers the printed pattern, and the printed pattern of the original background color cannot be reflected. The entire bottom surface is gray, which affects the appearance and performance of the fabric. Summary of the invention

[0004] In view of the above problems, the present invention provides a printing process based on metal plating, in which metal plating is first performed and then printing is performed, which not only saves the washing and drying steps in the original process flow, but also retains the original metallic color effect of the metal plating in the non-printing area (i.e., the blank area) of the substrate, while in the printing area, there are both printed patterns and metallic feel, which can highlight the metallization effect of the pattern; not only that, after the metal plating is performed first, the bottom surface of the substrate is metallic gray, and then the heat transfer printing is performed, and the bottom surface of the substrate is also penetrated by the pattern, covering the metallic gray, so that the printed substrate can be used on both sides, which not only improves the appearance, but also gives the substrate a new use function.

[0005] In order to achieve the above object, the present invention provides a printing process based on metal plating, comprising the following steps:

[0006] Metal coating: The printed substrate is pre-treated, inspected, and rolled up. Under vacuum conditions, metal coating is performed with a metal target to obtain a substrate coated with a titanium aluminum film;

[0007] Printing: The substrate coated with titanium aluminum film is subjected to heat transfer printing and rolled to obtain a metallized printing substrate.

[0008] The inventors found in the process of research that the current printing process causes the above problems because the existing process is to print first and then metal-plate. Such a sequence of processes causes the dark series of metal film layers to fully cover the printed pattern, and the original background color of the printed pattern cannot be reflected. In addition, after the metal titanium plating is completed, the bottom surface of the substrate will be infiltrated by metal titanium particles, resulting in the entire bottom surface being gray, affecting the appearance and performance of the substrate. Therefore, the inventors propose to adjust the process of the existing printing process, adjust the metal plating to before printing, and first perform metal plating and then perform printing, which can not only save the washing and drying processes in the original process flow, but also retain the original metal color effect of the metal plating in the non-printing area (i.e., blank area) of the substrate, and in the printing area, there are both printed patterns and metal sense, which can highlight the metallization effect of the pattern; not only that, after the metal plating is performed first, the bottom surface of the substrate is metallic gray, and then the heat transfer printing is performed, and the bottom surface of the substrate also has a pattern tongue, which covers the metallic gray, so that the printed substrate can be used on both sides, which not only improves the appearance, but also gives the substrate a new use function.

[0009] In one embodiment, the pre-treatment includes: degreasing, desizing, and cleaning.

[0010] In one embodiment, the vacuum condition is a vacuum degree of ≤3×10 -3 Pa.

[0011] In one embodiment, the metal target is a titanium aluminum alloy target.

[0012] After adjusting the process, the inventor found that the film layer formed by metal titanium has poor bonding strength, especially the dry and wet friction color fastness. Conventional products require American standard level 3 or above to be qualified, but the film layer formed by metal titanium is only level 2 and the metal single layer formed; and metal titanium has poor high temperature resistance, and it will easily deform and demold when it encounters more than 200°C. Therefore, after the metal titanium plating is completed, it cannot withstand the high temperature of the subsequent process of thermal transfer printing, resulting in damage to the metal film layer and deformation and demolding, or discoloration of the metal film layer. Based on this, the inventor proposed to use titanium aluminum alloy target material, which can withstand high temperatures, and because it contains two kinds of metals, it can improve color fastness at the same time. After the metal plating process is completed, a small amount of metal titanium aluminum residue will penetrate the bottom surface of the substrate, causing the substrate to become light gray. After thermal transfer printing, the bottom surface of the substrate also has both printed patterns and metallic feel, and both sides of the substrate can be used. And the metal film layer formed by the titanium aluminum alloy target material is more colorful and has better glossiness. In contrast, the color of the metal film layer formed by the Taiba material is relatively dark.

[0013] In one embodiment, the mass ratio of titanium to aluminum in the titanium-aluminum alloy target is 70:30 or 80:20.

[0014] In one embodiment, there are two titanium-aluminum alloy targets, one of which has a titanium-to-aluminum mass ratio of 70:30, and the remaining titanium-aluminum alloy target has a titanium-to-aluminum mass ratio of 80:20.

[0015] In one embodiment, the metal coating is achieved by magnetron sputtering, and the reaction conditions include: working voltage of 420-500V, frequency of 22-30kHz, flow rate of working gas of 500-600sccm, working vacuum pressure of 1.6-2.0×10 -1 Pa, the working power is 180-300KW, and the sputtering rate is 1.5-3nm / m.

[0016] The higher working voltage, working vacuum pressure and working power mentioned above can increase the bonding force of the film layer, thereby enhancing the bonding force between the sputtered nano-metal particles and the surface of the substrate, thereby obtaining a better sputtering effect.

[0017] In one embodiment, the metal coating is achieved by magnetron sputtering using a vacuum deposition textile winding metal coating device.

[0018] The above-mentioned vacuum deposition textile winding metal coating equipment is prepared according to the patent application number 201820970294.4 and the patent name is magnetron sputtering coating system.

[0019] In one embodiment, the working gas includes argon, nitrogen and oxygen, and the volume ratio of the argon, nitrogen and oxygen is (1-4): (1-3): (1-2).

[0020] In one of the embodiments, the metal coating is achieved by a nano-coating device, and the tension conditions of the nano-coating device include: 50-150N / m at the traction end, 30-100N / m at the driven end, 0.5-3m / min line speed, 5-40A working current, and a film thickness of 10-300nm.

[0021] In one embodiment, the working temperature of the heat transfer printing is 160-190°C.

[0022] In one embodiment, the working speed of the heat transfer printing is 1-2 m / min.

[0023] The invention also provides a metallized printing substrate prepared by the printing process.

[0024] In one embodiment, the substrate to be printed includes fabric.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] A printing process based on metal plating of the present invention and its application, the printing process first performs metal plating and then performs printing, which can not only save the washing and drying steps in the original process flow, but also retain the original metal color effect of the metal plating in the non-printing area (i.e., blank area) of the substrate, and in the printing area, there are both printed patterns and metallic sense, which can highlight the metallization effect of the pattern and solve the problem of color staining on the bottom surface of the fabric; not only that, after metal plating, the bottom surface of the substrate is metallic gray, and then thermal transfer printing is performed, and the bottom surface of the substrate is also penetrated by the pattern, covering the metallic gray, so that the printed substrate can be used on both sides, which not only improves the appearance, but also gives the substrate a new use function, and the non-printing area can retain the original metal film layer effect, especially the substrate of the medium and light color system. The printing process can broaden the product application scenarios, and in addition to the field of clothing and apparel, it can also be applied to home furnishings, sports and pet products. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of the printed fabric prepared in Example 1, the substrate is polyester pongee, specification is 50D*50D, width is 150cm, 100% polyester, woven fabric, white, weight 50g / m 2 ;

[0028] Figure 2 Schematic diagram of the printed fabric prepared in Comparative Example 1, the substrate is polyester pongee, specification is 50D*50D, width is 150cm, 100% polyester, woven fabric, white, weight 50g / m 2 . DETAILED DESCRIPTION

[0029] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0031] source:

[0032] Unless otherwise specified, the reagents, materials, and equipment used in this example are all commercially available; the experimental methods are all conventional experimental methods in the art unless otherwise specified.

[0033] Example 1

[0034] A printing process based on metal plating.

[0035] 1. Metal coating.

[0036] 1. Pre-treat the printed substrate.

[0037] Selection of base material: After repeated experimental verification, 100% polyester plain weave fabric with a width of 150cm, a gram weight of 50-90g / ㎡, a density of 250-400T, and a 20×20-70×70D woven fabric was selected as the verification object.

[0038] Determine the substrate: clean the substrate with deionized water. The fabric pretreatment here is different from the traditional printing and dyeing pretreatment. The fabric nano-coating color does not need to consider the factors that affect the dyeing quality requirements, such as the substrate's hair effect, whiteness, pH value and brightness. It only needs to ensure the cleanliness, flatness and dryness of the substrate. It only needs to remove oil, desizing and cleaning, which greatly reduces the pre-treatment process and the resulting energy consumption, water consumption, chemical dye auxiliaries and wastewater problems. Moreover, after the deionized water is used to clean the substrate, it can be recycled and reused to meet the requirements of environmental protection and cost reduction. Install the fabric substrate in the washing machine, fill it with clean deionized water, the resistivity is 12-18 megawatts, and set various parameters, such as 5-10 wash times, 95-105℃ washing temperature, 1-5m / min washing line speed, 100N washing tension, 50pa spray pressure, and 100-180℃ drying temperature.

[0039] 2. Check the cloth and roll it up.

[0040] After cleaning the substrate, further ensure the cleanliness and flatness of the substrate, inspect the substrate, install it on the cloth inspection machine, set the tension, line speed, forward rotation, edge diameter, winding diameter of the traction roller, turn on the low light and surface light, start the operation, roll up the substrate for vacuum packaging, and wait for the nano-coating equipment to proceed to the next step.

[0041] 3. Metal coating.

[0042] According to different color and process requirements, different metal targets are selected as the nano-film color-forming materials for production experiments. Metal targets are different from traditional printing and dyeing chemical dyes. Metal targets can be reused, do not produce waste gas and waste residue, can be recycled after use, and are stable metals, non-toxic and harmless to the human body. After the chemical dye is dyed once, there is still a lot of dye liquid in the material tank. These waste liquids cannot be reused, causing ecological environmental pollution and increasing cost pressure. In addition, they need to be purified and recycled before being discharged. The ecological treatment process is complicated and inefficient. Metal targets can be reused, and there is no possibility of waste.

[0043] Metal structural color titanium / aluminum plating process: According to different color requirements, select the corresponding metal target. In this embodiment, the metal color-producing material is selected: alloy titanium aluminum target, the target material specifications are 2150×150×15mm, the purity is 99.99%, the target is flat, the sharp edge chamfer is 0.5×45°, and the burrs are removed.

[0044] The number of metal targets is 3-10, the temperature of the cooling roller reaches -30°C, the deep cooling POLYCOLD reaches -128°C, the working voltage range is 420-500V, the frequency is 22-30kHz, the total gas flow rate is 500-600sccm, and argon, nitrogen and oxygen are filled into the working chamber. The volume ratio of argon, nitrogen and oxygen is in the range of 1:3:1-4:1:2 (that is, the volume ratio of argon, nitrogen and oxygen is (1-4): (1-3): (1-2)), and the working vacuum pressure of the working coating chamber is maintained at 1.6-2.0×10 -1 Pa, divided into 3 coating studios, tension settings: 50-150N / m at the traction end, 30-100N / m at the driven end, line speed 0.5-3m / min, adjustable working current 5-40A, film thickness 10-300nm, working power 180-300K, sputtering rate 1.5-3nm / m. Online color detection, color is regulated according to L*a*b* value, mainly by adjusting current for real-time control, L* value is 40-70, a* value is between 1.0-3.0, b* value is between 10-25.

[0045] 2. Printing.

[0046] Heat transfer printing: After the fabric is metal-plated with titanium aluminum, it is directly printed with heat transfer printing. The working temperature is 160-190℃, the working speed is 1-2m / min, and the printing is continuous.

[0047] Comparative Example 1

[0048] A printing process based on metal plating.

[0049] In this comparative example, the pretreatment is the same as that in Example 1, and the substrate after the pretreatment is first printed and then subjected to metal titanium plating.

[0050] The printing process is as follows: computer drawing → determine the pattern → print on paper → color adjustment → continuous printing → paper printing is completed → cloth washing to remove impurities (3 steps, water quality: tap water; working water temperature: 98℃; working speed: 7m / min: washing method: spray) → drying (drying method: infrared pre-drying, temperature 150℃, working speed 1m / min) → cloth inspection → heat transfer machine (working temperature 200-220℃, working speed 1-2m / min) → rolling → printing is completed.

[0051] The metal titanium plating process is as follows: printed fabric washing (6 steps, water quality: deionized water; working water temperature: 98°C; working speed: 5m / min: washing method: spraying) → drying (drying method: infrared pre-drying, temperature 150°C, working speed 1m / min) → fabric inspection → loading and rolling on the machine → vacuuming → titanium target refining → process debugging → metal titanium plating → cavity exit → inspection → fabric washing → post-finishing and soft feel finishing → rolling up the finished product.

[0052] In the above metal titanium plating process, a titanium target is used, and the sputtering process parameters are as follows: the number of metal targets is 5-10, the temperature of the cooling roller reaches -30°C, the deep cooling POLYCOLD reaches -128°C, the working voltage range is 400-500V, the frequency is 22-30kHz, the total gas flow rate is 300-600sccm, argon and nitrogen are filled into the working chamber, and the volume ratio of argon and nitrogen is in the range of 1:3-4:1 (that is, the volume ratio of argon and nitrogen is (1-4): (1-3), and the working vacuum pressure of the working coating chamber is maintained at 1.4-2.0×10 -1 Pa, divided into 3 coating studios, tension settings: 50-150N / m at the traction end, 30-100N / m at the driven end, line speed 1-3m / min, adjustable working current 15-40A, film thickness 50-300nm, working power 150-300KW, sputtering rate 1.0-2.5nm / m.

[0053] Compared with Example 1, Comparative Example 1 uses a different target material, and the process flow is first printing and then metal titanium plating. The sputtering process parameters of the metal titanium plating step are different, the process flow is more, there is a water washing step, and more energy consumption.

[0054] Experimental example

[0055] The printed fabrics prepared in Example 1 and Comparative Example 1 were tested.

[0056] 1. Printing on polyester using the process of Example 1, the effect obtained is as follows Figure 1As shown, the printing process of comparative example 1 is used on polyester, and the effect obtained is as follows Figure 2 shown.

[0057] 2. Through the testing method of textile fabrics, the color fastness to water and color fastness to abrasion of the fabrics were compared before and after. The test results are shown in the following table.

[0058] Table 1 Test results of printed fabrics of Example 1 and Comparative Example 1

[0059]

[0060] Note: The numerical value in the test result is a grade. The higher the grade, the higher the color fastness.

[0061] It can be seen from the data in the above table that the printing process of Example 1 was used to print on different fabrics (6 kinds, including acetate fiber and cotton), and their water fastness and rubbing fastness were tested. The printing process of Example 1 can obtain good water fastness and rubbing fastness on different fabrics.

[0062] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A printing process based on metal plating, characterized in that: The following steps are involved: Metal coating: The printed substrate is pre-treated, inspected, and rolled up. Under vacuum conditions, metal coating is performed with a metal target to obtain a substrate coated with a titanium aluminum film; Printing: The substrate coated with titanium aluminum film is subjected to heat transfer printing and rolled to obtain a metallized printing substrate.

2. The printing process according to claim 1, characterized in that: The vacuum condition is a vacuum degree of ≤3×10 -3 Pa.

3. The printing process according to claim 1, characterized in that: The metal target is a titanium-aluminum alloy target.

4. The printing process according to claim 3, characterized in that: The mass ratio of titanium to aluminum in the titanium-aluminum alloy target is 70:30 or 80:

20.

5. The printing process according to claim 1, characterized in that: The metal coating is achieved by magnetron sputtering, and the reaction conditions include: working voltage of 420-500V, frequency of 22-30kHz, flow rate of working gas of 500-600sccm, working vacuum pressure of 1.6-2.0×10 -1 Pa, the working power is 180-300KW, and the sputtering rate is 1.5-3nm / m.

6. The printing process according to claim 5, characterized in that: The working gas includes argon, nitrogen and oxygen, and the volume ratio of the argon, nitrogen and oxygen is (1-4): (1-3): (1-2).

7. The printing process according to claim 5, characterized in that: The metal coating is achieved by nano coating equipment, and the tension conditions of the nano coating equipment include: 50-150N / m at the traction end, 30-100N / m at the driven end, 0.5-3m / min line speed, 5-40A working current, and a film thickness of 10-300nm.

8. The printing process according to claim 1, characterized in that: The working temperature of the heat transfer printing is 160-190°C.

9. The metallized printing substrate prepared by the printing process according to any one of claims 1 to 8.

10. The metallized printing substrate according to claim 9, characterized in that: The substrate to be printed includes fabric.

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