A method for manufacturing printed cloth
By forming a low surface energy coating on the mesh of the fabric and filling it with printing paste, the printing is left only in the mesh after the coating is removed. This solves the problem of screen alignment and achieves a unique printing effect in the mesh. The process is simple and easy to operate.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- FUJIAN HUAFENG NEW MATERIALS
- Filing Date
- 2026-03-26
- Publication Date
- 2026-05-29
AI Technical Summary
In existing printing processes, fabrics are prone to deformation during printing, leading to changes in the mesh structure. This makes it difficult to accurately align the printing screen, and the printing paste inevitably gets printed onto the screen lines, making it difficult to achieve the unique printing effect within the mesh.
A low surface energy coating is formed on the mesh of the mesh fabric as an isolation layer. Then, printing paste is filled into the mesh, and the low surface energy coating is removed to ensure that the printing exists only in the mesh.
This technology allows printing to occur only within the mesh openings, solving the problem of screen alignment. The process is simple and easy to operate, resulting in precise mesh printing effects.
Smart Images
Figure CN122105885A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of printed fabric technology and relates to a method for preparing printed fabric. Background Technology
[0002] Printing on fabrics can enhance their aesthetics and also impart functionalities, such as reflective or fluorescent printing. As consumers demand greater diversity in printing, more and more styles are emerging. One such requirement is that the print exists only within the mesh openings of the fabric, without printing on the mesh lines themselves. This type of printing presents certain challenges. For example, the fabric's elasticity causes it to deform under pressure during printing, altering the structure of the mesh openings in different areas. This makes it difficult for the printing screen to precisely align all the openings, inevitably resulting in some ink being printed onto the mesh lines.
[0003] Therefore, the existing printing preparation process still needs further improvement. Summary of the Invention
[0004] To solve the above-mentioned technical problems, the present invention provides a method for preparing printed fabric. First, a low surface energy coating is formed on at least the mesh of the mesh fabric as an isolation layer. Then, printing paste is filled into the mesh. After removing the low surface energy coating, the printing paste is only present in the mesh. After drying, a printed fabric with printing only in the mesh is obtained.
[0005] The technical solution of the present invention is as follows:
[0006] A method for preparing a printed fabric includes the following steps: screen printing on a mesh fabric, covering the mesh lines of the mesh fabric with a low surface energy paste, drying to form a low surface energy coating, filling at least the mesh openings of the mesh fabric with printing paste, removing the low surface energy coating, drying, and obtaining the printed fabric.
[0007] Preferably, the mesh size of the mesh fabric is not less than 1 mm; The mesh of the mesh fabric extends through the mesh fabric; Alternatively, the mesh fabric may be a single-sided mesh; Alternatively, the mesh fabric may be double-sided, with the mesh openings on both sides interlaced and not penetrating the mesh fabric.
[0008] Preferably, the screen printing stencil is 100-300 mesh; The printing paste filling the mesh is selected from screen printing, and the screen printing screen is 10-40 mesh. Alternatively, the printing paste filling the mesh is selected from thin plate stencil coating.
[0009] Preferably, after screen printing, the process further includes: smoothing on a flat cloth to remove excess material from the back of the screen printing stencil.
[0010] Preferably, the surface tension of the low surface energy coating at 25°C does not exceed 28 mN / m.
[0011] More preferably, the low surface energy slurry is selected from one of water-based silicone slurry, oil-based silicone slurry, water-based fluororubber slurry, and oil-based fluororubber slurry.
[0012] Preferably, the low surface energy slurry extends from the mesh lines to the mesh openings and covers a portion of the mesh openings.
[0013] More preferably, the area of the mesh covered by the low surface energy slurry does not exceed 70% of the mesh area.
[0014] Preferably, the printing paste is filled into the mesh of the mesh fabric in multiple consecutive fillings until the target thickness is achieved.
[0015] Preferably, the surface tension of the printing paste at 25°C is not less than 35 mN / m; Preferably, the printing paste is selected from water-based polyurethane paste.
[0016] The beneficial effects of this invention are: (1) This invention utilizes the low surface tension of the low surface energy coating and the poor bonding force with the mesh of the fabric to obtain printed fabric with the printing coating only present in the mesh. The process is simple and easy to operate.
[0017] (2) In this invention, the height of the printing coating can be lower than, equal to or higher than the mesh thickness of the mesh fabric, and the printing coating can also be a foam coating, etc., so as to obtain printed fabrics with different visual effects. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the preparation process of the printed fabric in Example 1.
[0019] Figure 2 This is a photograph of the printed fabric from Example 1.
[0020] Figure 3 This is a photograph of the printed fabric from Example 2.
[0021] Figure 4 This is a schematic diagram of the preparation process of the printed fabric in Example 3. Detailed Implementation
[0022] The technical solution of the present invention will be further explained and described below through specific embodiments.
[0023] This invention proposes a method for preparing printed fabric, comprising the following steps: screen printing on a mesh fabric, covering the mesh lines of the mesh fabric with a low surface energy paste, drying to form a low surface energy coating, filling at least the mesh openings of the mesh fabric with printing paste, removing the low surface energy coating, drying, and obtaining the printed fabric.
[0024] By screen printing on perforated fabric, the printing paste can cover at least the mesh lines of the fabric, and may also cover part of the mesh openings. Therefore, a low surface energy printing paste is used, and the resulting low surface energy coating has the following characteristics: (1) low adhesion to the mesh lines, making it easy to peel off; (2) it avoids the printing paste adhering to the mesh lines, allowing the printing paste to fill (partially or completely) the mesh openings. Some printing paste may also adhere to the surface of the low surface energy coating, but it will be removed along with the low surface energy coating and will not leave any residue. Therefore, by the above method, a printed fabric with the printing coating existing only within the mesh openings can be obtained, achieving precise printing on the mesh openings of the perforated fabric.
[0025] In some embodiments, the mesh size of the mesh fabric is not less than 1 mm; The mesh of the mesh fabric penetrates through the mesh fabric; Alternatively, the mesh fabric may have a single-sided mesh. Alternatively, the mesh fabric is double-sided, with the mesh holes on both sides interlacing but not penetrating the mesh fabric.
[0026] In this invention, there are no particular limitations on the mesh fabric; it can be mesh yarn with mesh openings penetrating the fabric; it can also be a composite mesh fabric, such as mesh openings on one side only (single-sided mesh), or mesh openings on both sides of the fabric, but the mesh openings on both sides are staggered and do not penetrate each other, nor are they connected. The mesh opening size of the mesh fabric is generally not less than 1mm. If the mesh opening size is too small, the low surface energy may clog the mesh openings during the screen printing process.
[0027] In some embodiments, the screen printing stencil is 100-300 mesh; The printing paste filling the mesh is selected from screen printing, and the screen printing screen is 10-40 mesh; Alternatively, the printing paste filling the mesh is selected from thin plate stencil coating.
[0028] For low surface energy pastes, screen printing and coating the printing plates are more suitable. For printing pastes, the paste can be applied and filled according to the designed pattern, either through screen printing or by using a thin-plate stencil. Applying and filling according to the designed pattern can produce printed fabrics with different effects. The thickness of the thin-plate stencil used for thin-plate stencil coating can not exceed 0.3mm.
[0029] In some embodiments, after screen printing, the process further includes: smoothing on a flat cloth to remove excess material from the back of the screen printing stencil. After screen printing with low surface energy paste, excess material may remain on the back of the stencil, causing it to cover the mesh openings during subsequent screen printings. Scraping on a flat cloth removes this excess material, ensuring that each print of the low surface energy paste covers the screen lines, but not all of the mesh openings.
[0030] In some embodiments, the surface tension of the low surface energy coating at 25°C does not exceed 28 mN / m. The low surface tension of the low surface energy coating is unfavorable for the diffusion of the printing paste, causing it to accumulate in the mesh openings, and also facilitates peeling off from the screen. For example, the surface tension of the low surface energy coating at 25°C can be 20 mN / m, 21 mN / m, 22 mN / m, 23 mN / m, 24 mN / m, 25 mN / m, 26 mN / m, 27 mN / m, 28 mN / m, etc.
[0031] In some embodiments, the low surface energy paste is selected from one of water-based silicone paste, oil-based silicone paste, water-based fluororubber paste, and oil-based fluororubber paste. The surface tension (25°C) of the silicone coating formed by water-based and oil-based silicone pastes generally does not exceed 27 mN / m, and the surface tension (25°C) of the fluororubber coating formed by water-based and oil-based fluororubber pastes generally does not exceed 23 mN / m. Water-based silicone paste, oil-based silicone paste, water-based fluororubber paste, and oil-based fluororubber paste can all be directly obtained from the market. For example, for oil-based silicone paste, existing printing silicone can be used; for water-based silicone paste, existing water-based silicone printing paste can be used.
[0032] In some embodiments, the low surface energy paste extends from the screen lines towards the mesh openings and covers a portion of the mesh openings. Besides covering the screen lines of the mesh fabric, the low surface energy paste can also extend from the screen lines towards the mesh openings and cover a portion of the mesh openings; that is, the low surface energy paste at least covers the screen lines of the mesh fabric and can also extend from the screen lines towards the mesh openings and cover a portion of the mesh openings. The larger the area of the mesh openings covered by the low surface energy paste, the lower the proportion of the printed coating formed in the mesh openings. The partial coverage of the mesh openings by the low surface energy paste can be achieved by adjusting the screen printing process, for example, by using a screen with a relatively low mesh count, such as 100-200 mesh.
[0033] In some embodiments, the area of the mesh covered by the low surface energy slurry does not exceed 70% of the mesh area. For example, the area of the mesh covered by the low surface energy slurry does not exceed 70%, 60%, 50%, 40%, 30%, 20%, 10%, 0%, etc. Further, the area of the mesh covered by the low surface energy slurry does not exceed 30% of the mesh area.
[0034] In some embodiments, the printing paste is filled into the mesh of the fabric in multiple consecutive fillings until the target thickness is achieved. If the mesh is deep, a single filling process (screen printing or thin-plate stencil coating) may not be sufficient to achieve the target thickness, and multiple fillings may be performed to reach the target thickness. Depending on the design requirements of the printed coating, the target thickness of the printed coating may be lower than, the same as, or higher than the depth of the mesh, thereby obtaining recessed, flush, and raised coatings, respectively.
[0035] In some embodiments, the surface tension of the printing paste at 25°C is not less than 35 mN / m; Furthermore, the printing paste is selected from water-based polyurethane paste.
[0036] The surface tension of the printing paste is higher than that of the low surface energy coating, making it difficult for the printing paste to wet and / or adhere to the surface of the low surface energy coating, or causing it to be repelled by the low surface energy coating and concentrated in the mesh. Waterborne polyurethane printing paste is a commonly used printing paste and is also a commonly used waterborne printing paste, which can be obtained directly from the market. When using thin-plate stencil coating, the printing paste can also contain rubber powder, granular fibers, etc., to give the printing coating a coarse-grained effect.
[0037] The technical solution of the present invention will be further described and illustrated below with reference to various embodiments. Unless otherwise specified, the parts mentioned in the following embodiments are parts by weight.
[0038] Example 1 As attached Figure 1 As shown in Figure (a) above, the mesh fabric 1 contains mesh lines 2 and mesh openings 3, with the mesh openings 3 penetrating the mesh fabric 1. Oil-based printing silicone is screen-printed onto the mesh lines 2 of the mesh fabric 1 using a 250-mesh screen. The fabric is then heated and dried at 120°C for 10 minutes, forming a low surface energy coating—silicone coating 4 (surface tension of 24 mN / m at 25°C)—on the mesh lines. A light blue water-based polyurethane paste (surface tension of 43 mN / m at 25°C) is then continuously screen-printed onto the mesh fabric using a 40-mesh screen containing the designed pattern. This light blue water-based polyurethane paste fills the mesh openings 3. The silicone coating 4 is then peeled off. The mesh fabric 1 is dried at 60°C for 30 minutes, and the water-based polyurethane paste forms a print 5 at the mesh openings. The thickness of print 5 exceeds the depth of the mesh openings 3, resulting in a raised printed fabric. A schematic diagram of the printed fabric structure is attached. Figure 1 As shown in Figure (b) below.
[0039] The actual image of the printed fabric obtained in this embodiment is attached. Figure 2 As shown, the printed coating is not visible at the mesh lines; the printed coating is only present at the mesh openings and is protruding.
[0040] Example 2 The difference between this embodiment and Embodiment 1 is as follows: In Embodiment 1, after continuous multi-pass screen printing of light blue water-based polyurethane paste, a 40-mesh screen with the designed pattern is used to continuously screen print dark blue water-based polyurethane paste (surface tension at 25°C is 37 mN / m). The actual image of the resulting printed fabric is attached. Figure 3 As shown, it can be seen that the printing coating is not visible at the mesh lines; the printing coating is only at the mesh openings, and the dark blue water-based polyurethane paste basically covers the light blue water-based polyurethane paste.
[0041] Example 3 As attached Figure 4 As shown, the mesh fabric 6 is a single-sided mesh fabric containing mesh lines 7 and mesh openings 8. Water-based printing silicone is screen-printed onto the mesh lines 7 and extending towards the mesh openings 8 using a 200-mesh screen. The area of the mesh openings 8 covered by the water-based printing silicone is 20-25%. After drying at 100℃ for 25 minutes, a low surface energy silicone coating 9 (surface tension of 27 mN / m at 25℃) is formed on the mesh lines 7 and parts of the mesh openings 8. A light gray water-based polyurethane paste (surface tension of 43 mN / m at 25℃) is then continuously screen-printed onto the mesh fabric 6 using a 40-mesh screen containing the designed pattern. This light gray water-based polyurethane paste fills the mesh openings. The silicone coating 9 is then peeled off. The mesh fabric is dried at 60℃ for 30 minutes, forming a print 10 at the mesh openings. The thickness of the print 10 is greater than the depth of the mesh openings 8, resulting in a raised printed fabric. The printing coating is not visible at the mesh area of the printed fabric; it is only present at the mesh openings.
[0042] As described above, the basic principles, main features, and advantages of the present invention have been shown and described. Those skilled in the art should understand that the present invention is not limited to the above embodiments, which are merely preferred embodiments and should not be construed as limiting the scope of the invention. All equivalent changes and modifications made in accordance with the scope of the patent and the description should still fall within the scope of the present invention. The scope of protection of this invention is defined by the appended claims and their equivalents.
Claims
1. A method for preparing a printed fabric, characterized in that, The steps include: Screen printing is performed on a perforated fabric, a low surface energy paste is coated on the mesh lines of the perforated fabric, dried to form a low surface energy coating, printing paste is then filled at least in the mesh openings of the perforated fabric, the low surface energy coating is removed, and the fabric is dried to obtain the printed fabric.
2. The method for preparing the printed fabric according to claim 1, characterized in that, The mesh size of the mesh fabric is not less than 1mm; The mesh of the mesh fabric extends through the mesh fabric; Alternatively, the mesh fabric may be a single-sided mesh; Alternatively, the mesh fabric may be double-sided, with the mesh openings on both sides interlaced and not penetrating the mesh fabric.
3. The method for preparing the printed fabric according to claim 1, characterized in that, The screen printing stencil is 100-300 mesh; The printing paste filling the mesh is selected from screen printing, and the screen printing screen is 10-40 mesh. Alternatively, the printing paste filling the mesh is selected from thin plate stencil coating.
4. The method for preparing the printed fabric according to claim 1, characterized in that, After the screen printing, the process further includes: smoothing the surface on a flat cloth to remove excess material from the back of the screen printing stencil.
5. The method for preparing the printed fabric according to claim 1, characterized in that, The surface tension of the low surface energy coating does not exceed 28 mN / m at 25°C.
6. The method for preparing the printed fabric according to claim 5, characterized in that, The low surface energy slurry is selected from one of the following: water-based silicone slurry, oil-based silicone slurry, water-based fluororubber slurry, and oil-based fluororubber slurry.
7. The method for preparing the printed fabric according to claim 1, characterized in that, The low surface energy slurry extends from the mesh lines into the mesh openings and covers a portion of the mesh openings.
8. The method for preparing the printed fabric according to claim 7, characterized in that, The area of the mesh covered by the low surface energy slurry does not exceed 70% of the mesh area.
9. The method for preparing the printed fabric according to claim 1, characterized in that, The printing paste is filled into the mesh of the fabric multiple times until the target thickness is achieved.
10. The method for preparing the printed fabric according to claim 1, characterized in that, The surface tension of the printing paste at 25℃ is not less than 35mN / m; Preferably, the printing paste is selected from water-based polyurethane paste.