Embroidery-imitating printing process based on UV digital printing and printed textile

Abstract

The invention discloses an embroidery-imitating printing process based on UV digital printing and a printed textile, and relates to the technical field of printed textiles. The embroidery-imitating printing process comprises the following steps: coating an EVA / TPU (Ethylene Vinyl Acetate / Thermoplastic Polyurethane) composite hot melt adhesive on a release layer to prepare a hot melt adhesive layer; carrying out UV ink-jet printing on the hot melt adhesive layer to form a printed pattern, and attaching a protective layer to the surface of the hot melt adhesive layer; removing the release layer located on the bottom surface of the hot melt adhesive layer, attaching the hot melt adhesive layer to the textile fabric at 100-150 DEG C, tearing off the protective layer and separating the hot melt adhesive layer in a non-pattern area from the printing pattern along with the protective layer, and performing flat plate pressing to obtain the textile fabric containing the embroidery-imitating printing. The production method has the advantages that the production efficiency is high, printed patterns have the aesthetic property of embroidery and are rich in stereoscopic impression, and printed objects have the characteristics of high strength and toughness and high color fastness to rubbing.

Description

Technical Field

[0001] The present invention belongs to the technical field of printed textiles, and particularly relates to an embroidery-like printing process based on UV digital printing and printed textile products. Background Art

[0002] Embroidery, as a traditional handicraft art, is deeply loved by people for its exquisite patterns and unique three-dimensional sense. However, traditional embroidery processes have disadvantages such as low production efficiency, high cost, and difficulty in achieving large-scale production, making it difficult to meet the needs of modern textiles. To overcome the limitations of traditional embroidery, embroidery-like printing technology has emerged. Embroidery-like printing forms patterns with embroidery effects on fabrics through printing processes, combining the aesthetics of embroidery and the production efficiency of printing processes.

[0003] Existing embroidery-like printing technologies mainly include foaming printing, flocking printing, and digital printing. The foaming printing technology uses foaming pastes to print patterns, which form a three-dimensional effect after heating; for example, CN104562767A proposes a printing material, and a printing material containing 30% - 50% foaming agent is prepared through screen printing process to form an embroidery-like pattern with strong layering; however, the foaming material has a hard handfeel, low water washing and friction resistance performance, and the screen printing process also requires processes such as plate making, scraping, and laser cutting, resulting in a long production cycle. Flocking printing is to implant short fibers in the pattern area to form a velvet surface effect, but the pattern fineness is limited and it is easy to shed hair. Digital printing prints patterns on fabrics by inkjet, which can achieve high-precision patterns and high production efficiency, and is gradually developed and applied in the textile printing and dyeing industry. However, digital printing mainly uses water-based coatings, making it difficult to achieve the stacking of coatings, with a small height difference of the patterns and a lack of three-dimensional sense.

[0004] Aiming at the lack of three-dimensional sense of traditional digital printing, Patent CN110318276A proposes a processing method for digital printing embroidery-like. Before digital printing, pretreatment is first carried out using a pretreatment solution, and then in the flower pattern part, coating treatment is carried out using a thermoplastic resin and carbonate; then digital printing is carried out, and after printing, high-temperature treatment is carried out again; it combines digital printing with foaming printing, which can form a relief on the surface of the fabric pattern, with a concave and convex effect, to simulate the three-dimensional effect of embroidery; however, this process relies on foaming materials, and due to the existence of pores in the foaming materials, their toughness and weather resistance are poor, and the friction fastness of color also fails to meet the requirements. Summary of the Invention

[0005] The object of the present invention is to overcome the defects and deficiencies of existing embroidery-like printed textiles, and provide an embroidery-like printing process based on UV digital printing, which has high production efficiency, the printed pattern has the aesthetics of embroidery, is three-dimensional, and the printed product has high strength, toughness, and high friction fastness of color.

[0006] Another object of the present invention is to provide a textile product with an embroidered-like print prepared by the above-mentioned embroidered-like printing process.

[0007] The above object of the present invention is achieved by the following technical solutions:

[0008] The present invention protects an embroidered-like printing process, which includes the following steps:

[0009] S1, coating an EVA / TPU composite hot melt adhesive on a release layer to prepare a hot melt adhesive layer;

[0010] S2, performing UV inkjet printing on the hot melt adhesive layer to form a printed pattern, and laminating a protective layer on the surface of the hot melt adhesive layer;

[0011] S3, removing the release layer located at the bottom surface of the hot melt adhesive layer, laminating the hot melt adhesive layer on a textile at 100 - 150 °C, tearing off the protective layer and separating the hot melt adhesive layer in the non-pattern area from the printed pattern along with the protective layer, and performing flat pressing to obtain a textile with an embroidered-like print.

[0012] In the embroidered-like printing process of the present invention, an embroidered pattern is printed on an EVA / TPU composite hot melt adhesive by using UV inkjet printing technology, and then the EVA / TPU composite hot melt adhesive is thermally transferred to a textile to obtain a textile with an embroidered-like print. The print can simulate a strong three-dimensional effect of embroidery, and has the characteristics of high elasticity of the EVA / TPU composite hot melt adhesive, with advantages of high rubbing fastness and good washability.

[0013] Specifically, the inventor of the present invention uses an EVA / TPU composite hot melt adhesive as the base material and prints patterns by using UV inkjet printing technology. It has the advantages of high precision and rich colors of digital printing. At the same time, during the UV printing process, the ink for inkjet printing is instantaneously cured under UV light irradiation, and the ink is not easy to spread, which is beneficial to the accumulation of printing substances, forming a pattern with a high drop and a strong sense of hierarchy; it avoids the defects of hard hand feeling, low washability and low rubbing resistance of foaming materials.

[0014] Due to the large number of fine line patterns in the imitation embroidery printing pattern, the width of which can be less than 1 mm, it is difficult to separate the printing pattern from the surrounding hot melt adhesive. In this regard, the heat transfer pressing process of the present invention is divided into a two-step treatment. First, the hot melt adhesive layer is bonded to the fabric at 100-150 °C, and then the protective layer is torn off and waste is discharged. Due to the strong pressure sensitivity of the EVA hot melt adhesive and the greater crystallinity of the pattern containing UV ink, there is a large difference in the bonding force between the printing pattern and the hot melt adhesive layer and the fabric at this time, causing the printing pattern to adhere to the fabric, and the hot melt adhesive layer around the pattern is separated from the printing pattern along with the protective layer; then the pattern is hot-pressed by a flat plate, which can deeply bond and cure the pattern to the fabric. Through the two-step heat transfer treatment, the fine lines of the imitation embroidery printing pattern can be protected, and the damage to the fine lines during the waste discharge process can be reduced; the transferred pattern is not deformed and has high adhesiveness.

[0015] The present invention has no special requirements for the UV light band, and the object of the present invention can be achieved within the conventional UV light band range capable of realizing ink curing. Preferably, the UV light band can be the near-ultraviolet and / or UVA band. More preferably, the UV light band in the UV inkjet printing is 365-425 nm, and further preferably 365-395 nm.

[0016] There are no special requirements or restrictions on the ink in the UV inkjet printing of the present invention, and it can be selected from commercially available conventional UV inks; including but not limited to the UV curable ink of Zhuhai Tianwei Company and / or the soft UV curable ink of Shenzhen Ink Bank Company.

[0017] In some embodiments, the UV inkjet printing includes a secondary UV irradiation process, and the secondary UV irradiation process is as follows:

[0018] (1) First UV irradiation: The first UV light moves synchronously with the inkjet printing component, so that the inkjet printed ink is instantaneously cured under the irradiation of the first UV light to form a printed pattern;

[0019] (2) Second UV irradiation: A second UV light is provided downstream of the inkjet printing, and the printed pattern is cured and shaped under the irradiation of the second UV light.

[0020] Preferably, in step S3, the temperature at which the hot melt adhesive layer is bonded is 110-140 °C, and more preferably 120-135 °C.

[0021] In some embodiments, in step S3, the pressure of the flat plate pressing is 0.1-0.8 Mpa, and the treatment time is 0.5-10 s. Preferably, the pressure is 0.3-0.7 Mpa, and the treatment time is 1-3 s.

[0022] In some of these embodiments, the mass ratio of EVA to TPU in the EVA / TPU composite hot melt adhesive is (1.4 - 3):1. Since EVA hot melt adhesive has strong adhesiveness, which is not conducive to digital printing processing, traditional EVA hot melt adhesive printing usually adopts offset printing, gravure printing or screen printing technology; in this regard, the present invention uses a compound of EVA and TPU to form an EVA / TPU composite hot melt adhesive, reducing the crystallinity of the material, enabling UV inkjet printing processing, and after subsequent heat transfer treatment, it will crosslink and cure and adhere to textiles, having a high peel strength, and the printing material has good mechanical properties.

[0023] In some of these embodiments, the EVA / TPU composite hot melt adhesive comprises the following components in parts by mass: 15 - 25 parts of TPU, 35 - 45 parts of EVA, 0.5 - 2 parts of polypropylene, and 1 - 3 parts of LDPE.

[0024] Preferably, the content of TPU in the EVA / TPU composite hot melt adhesive that can achieve the purpose of the present invention can be any value within the range of 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, 21 parts, 22 parts, 23 parts, 24 parts, 25 parts or more.

[0025] Preferably, the content of EVA in the EVA / TPU composite hot melt adhesive that can achieve the purpose of the present invention can be any value within the range of 35 parts, 36 parts, 37 parts, 38 parts, 39 parts, 40 parts, 41 parts, 42 parts, 43 parts, 44 parts, 45 parts or more.

[0026] Preferably, the content of polypropylene in the EVA / TPU composite hot melt adhesive that can achieve the purpose of the present invention can be any value within the range of 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts, 1.0 parts, 1.1 parts, 1.2 parts, 1.3 parts, 1.4 parts, 1.5 parts, 1.6 parts, 1.7 parts, 1.8 parts, 1.9 parts, 2.0 parts or more.

[0027] Optionally, the VA content of the EVA ≥ 30 wt%. The present invention preferably uses EVA with a higher VA content, which has high resilience and flexibility, good compatibility with TPU, and more importantly, can reduce the crystallinity of the material, which is beneficial to UV inkjet printing processing and subsequent heat transfer treatment.

[0028] In the present invention, a specific amount of polypropylene is added to the composite hot melt adhesive to increase the hardness of the material, improve the influence of the excessive VA content in EVA on the decrease in rigidity, enhance the shearability, make the excess adhesive film not easy to draw and remain, and facilitate waste discharge; however, adding polypropylene will affect its fluidity to a certain extent and there will be a slight precipitation phenomenon at high temperatures. In the present invention, adding LDPE can improve the dispersibility of the material, improve the defect of high-temperature precipitation of the material, and improve the flow effect of the liquid during coating.

[0029] The present invention has no special limitation on polypropylene, and it can be selected from conventional raw materials in the art. The material can be any one of homopolypropylene, random copolymer polypropylene or block copolymer polypropylene. Preferably, the difference in melt flow rate between the EVA and the polypropylene is ≤20 g / min. Controlling the difference in melt flow rate between polypropylene and EVA is beneficial to improving the processing performance.

[0030] In some embodiments, the EVA / TPU composite hot melt adhesive further comprises: 10-14 parts of tackifying resin, 3-8 parts of film-forming agent, 0.1-3 parts of dispersant, 0.1-3 parts of wetting agent, 0.1-3 parts of curing agent, 0.1-2 parts of leveling agent, and 10-25 parts of solvent.

[0031] Optionally, the tackifying resin is polyvinyl acetate.

[0032] Optionally, the film-forming agent is polyurethane resin and / or acrylic resin.

[0033] Optionally, the solvent includes but is not limited to toluene, acetone and N,N-dimethylformamide (DMF).

[0034] In some embodiments, the material of the textile fabric is at least one of cotton fiber, hemp fiber, nylon fiber, acrylic fiber, polyester fiber or animal wool.

[0035] The present invention has no special limitation on the protective layer, and the material can generally be selected from conventional general plastics or rubbers; preferably, the material of the protective layer is at least one of PE, PP, PVC or PS, and the thickness is 30-100 um. At this time, the protective layer has appropriate softness and hardness, which is more conducive to the peeling of the hot melt adhesive in the non-pattern area and improves the waste discharge efficiency.

[0036] The present invention protects an embroidered-like printed textile fabric prepared by the embroidered-like printing process.

[0037] Compared with the prior art, the beneficial effects of the present invention are:

[0038] The present invention provides an imitation embroidery printing process, which prints an embroidery pattern on an EVA / TPU composite hot melt adhesive by using UV inkjet printing technology, and then thermally transfers the EVA / TPU composite hot melt adhesive to a textile to obtain a textile with imitation embroidery printing. The printing can simulate a strong three-dimensional embroidery effect and has the characteristics of high elasticity of the EVA / TPU composite hot melt adhesive, high rubbing fastness and wash resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 FIG. is a physical picture of a product obtained by an imitation embroidery printing process according to Embodiment 1 of the present invention.

[0040] Figure 2 is Figure 1 A partial enlarged view of the printing pattern of the product.

[0041] Figure 3 FIG. is a physical picture obtained by an imitation embroidery printing process according to Embodiment 2 of the present invention.

[0042] Figure 4 FIG. is a physical picture obtained by an imitation embroidery printing process according to Embodiment 2 of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0043] The present invention will be further described below in conjunction with the specific embodiments, but the embodiments do not limit the present invention in any form. Unless otherwise specified, the raw material reagents used in the embodiments of the present invention are raw material reagents purchased conventionally.

[0044] The sources of the raw materials in the following embodiments are as follows:

[0045] Thermoplastic polyurethane elastomer (TPU): WHT-1150, Wanhua Chemical Co., Ltd.

[0046] Ethylene-vinyl acetate copolymer (EVA): EVA 150, Mitsui Chemicals, Japan; the content of vinyl acetate (VA) is 33 wt.%.

[0047] Polyvinyl acetate: S0105, Wacker, Japan.

[0048] Polyurethane resin: 627, Lihua Group, Taiwan, China.

[0049] LDPE: 1C7A, Yanshan Petrochemical Corporation.

[0050] Polypropylene: MU4016, Yanshan Petrochemical Corporation.

[0051] Dispersant: polyurethane type; 330, Dongguan Ruishang Co., Ltd.

[0052] Wetting agent: German TEGO 410.

[0053] Curing agent: AE808, Guangzhou Yaxin New Materials Co., Ltd.

[0054] Leveling agent: BYK-420, BYK Chemie GmbH.

[0055] Example 1

[0056] An imitation embroidery printing process, comprising the following steps:

[0057] S1, coating an EVA / TPU composite hot melt adhesive on a release layer to prepare a hot melt adhesive layer;

[0058] Specifically: Coating an EVA / TPU coating on the surface of a 50um heavy release film and drying it. The coating machine oven has 7 sections, each section is 4 meters long, the speed is 12m / min, the temperature of the first section is 70°C, the second section oven is 80°C, the third section oven is 110°C, the fourth section oven is 150°C, the fifth section oven is 150°C, the sixth section oven is 140°C, the seventh section oven is 100°C, the coating thickness is 65um, after coming out of the drying oven, it passes through a cooling roller for cooling, and is laminated with a 25um release film for winding to obtain a film containing a hot melt adhesive layer.

[0059] Among them, the EVA / TPU hot melt adhesive coating is made of the following components by mass: 20 parts of TPU, 40 parts of EVA, 12 parts of tackifying resin, 5 parts of film-forming agent, 2 parts of LDPE, 1.5 parts of polypropylene, 2 parts of dispersant, 2 parts of wetting agent, 2 parts of curing agent, 1 part of leveling agent, 15 parts of solvent.

[0060] In this example, the tackifying resin is polyvinyl acetate, and the film-forming agent is polyurethane resin.

[0061] The preparation method of the EVA / TPU hot melt adhesive coating includes the following steps:

[0062] (1) Adding TPU particles to an appropriate amount of DMF, stirring in a heating and stirring barrel at 70°C for 40 min, with a rotation speed of 200 rpm, so that the particles are melted in DMF to form a liquid, and then transferring it to a 60°C constant temperature barrel for temporary storage to keep its stable liquid fluidity;

[0063] (2) Adding EVA particles and polypropylene particles to an appropriate amount of toluene and acetone, stirring in a heating and stirring barrel at 70°C for 40 min, with a rotation speed of 230 rpm, so that the raw material particles are dissolved to form a liquid, and then transferring it to a 60°C constant temperature barrel for temporary storage to keep its stable liquid fluidity;

[0064] (3) Adjusting the temperature to 170°C in a heating barrel, mixing and dispersing LDPE with water in a molten state, and then introducing it into the TPU material in step S1 and stirring for 10 min to make them compatible to obtain a mixed material;

[0065] (4) Add the mixed material to the EVA / PP material obtained in step (2). Add a dispersant and stir at a low speed of 2500 rpm for 30 min, then add a tackifying resin, a film-forming agent, a wetting agent, a curing agent, and a leveling agent, and stir at a low speed for 60 min to obtain an EVA / TPU hot-melt adhesive coating. During all the stirring processes in step (4), the temperature is controlled to be 60°C.

[0066] S2, Perform UV inkjet printing on the hot-melt adhesive layer to form a printed pattern, and attach a protective layer to the surface of the hot-melt adhesive layer;

[0067] Specifically: Tear off the 25-μm release film on the surface of the film, perform UV inkjet printing on the hot-melt adhesive layer through a UV digital printer. The ink is selected from the UV-curable ink of Zhuhai Tianwei Company. A first UV lamp (365 nm, 25 W) is provided on the inkjet printing assembly in the UV digital printer, and the first UV lamp moves synchronously with the print head to instantaneously cure the printed ink; Downstream of the workbench of the UV digital printer, a second UV lamp (365 nm, 30 W) is added for irradiation to cure and shape the printed pattern under the irradiation of the second UV lamp, and then a PE protective film is covered to obtain a hot-melt adhesive film with a pattern.

[0068] S3, Remove the release layer on the bottom surface of the hot-melt adhesive layer, attach the hot-melt adhesive layer to the fabric at 130°C, tear off the protective layer and separate the hot-melt adhesive layer in the non-pattern area from the printed pattern along with the protective layer, and perform flat pressing to obtain a fabric with an embroidered-like printed pattern.

[0069] Specifically: Place the cotton fabric on a workbench at 130°C, tear off the 50-μm heavy release film under the hot-melt adhesive film with a pattern, attach the hot-melt adhesive film to the cotton fabric, and tear off the PE protective film. At this time, the pattern is completely bonded to the fabric, and the excess hot-melt adhesive around the pattern will transfer to the protective film, achieving the effect of waste discharge. Then, cover an isolation cloth on the pattern surface and perform flat pressing for 1 s with a pressure of 0.7 Mpa to obtain a fabric with an embroidered-like printed pattern.

[0070] The obtained product is as Figure 1-2 shown. Figure 1 Show the embroidered printed fabric and the torn PE protective film. It can be seen that the printed pattern adheres to the fabric, the pattern is clear and complete, the edge is flat, and there is no wire drawing; The hot-melt adhesive layer around the pattern adheres to the PE protective film, and the waste discharge is complete without residue. From Figure 2 it can be seen that the printed pattern of the present invention is vivid, the three-dimensional effect of embroidery is obvious, and it is full of three-dimensional sense.

[0071] The Figure 1The color fastness to dry and wet rubbing of the product is tested according to the method of Standard GB / T 3920-2008; the color fastness to dry rubbing reaches Grade 4, and the color fastness to wet rubbing reaches Grade 3-4. It is evaluated after soap solution washing for 30 min according to Method A(1) of Standard GB / T 3921-2008 and repeating 5 times; there is no obvious fading. Under the condition of 800 rpm, it is washed with water for 20 min and repeated 20 times. There is no delamination or breakage of the embroidered pattern imitation on the fabric.

[0072] Example 2

[0073] An embroidered pattern imitation printing process includes the following steps:

[0074] S1, Coating an EVA / TPU composite hot melt adhesive on a release layer to prepare a hot melt adhesive layer; the specific preparation process of the hot melt adhesive layer is the same as that in Example 1.

[0075] S2, Performing UV inkjet printing on the hot melt adhesive layer to form a printed pattern, and laminating a protective layer on the surface of the hot melt adhesive layer;

[0076] Specifically: Tear off the 25um release film on the surface of the film, perform UV inkjet printing on the hot melt adhesive layer through a UV digital printer, the ink is selected from UV curable ink of Zhuhai Tianwei Company, and a first UV lamp (365nm, 25W) is arranged on the inkjet printing component in the UV digital printer, and the first UV lamp moves synchronously with the printing nozzle to instantaneously cure the printed ink; Downstream of the workbench of the UV digital printer, a second UV lamp (365nm, 30W) is added for irradiation to cure and shape the printed pattern under the irradiation of the second UV lamp, and then a PE protective film is covered to obtain a hot melt adhesive film with a pattern.

[0077] S3, Removing the release layer on the bottom surface of the hot melt adhesive layer, laminating the hot melt adhesive layer on the fabric at 100°C, tearing off the protective layer and separating the hot melt adhesive layer in the non-pattern area from the printed pattern along with the protective layer, and performing flat pressing to obtain a fabric with embroidered pattern imitation printing.

[0078] Specifically: Place the cotton fabric on a 100°C workbench, tear off the 50um heavy release film under the hot melt adhesive film with a pattern, laminate the hot melt adhesive film on the cotton fabric, tear off the PE protective film, at this time the pattern is completely bonded to the fabric, and the excess hot melt adhesive around the pattern will transfer to the protective film to achieve the effect of waste discharge, and then cover an isolation cloth on the surface of the pattern and perform flat pressing for 1 s while it is hot under a pressure of 0.7 Mpa to obtain a fabric with embroidered pattern imitation printing.

[0079] The obtained product is as Figure 3As shown, it can be seen that the printed pattern of the present invention is vivid, the three-dimensional effect of the embroidery is obvious, and it is full of three-dimensional sense. The color fastness to dry rubbing and wet rubbing of this product was tested according to the method of GB / T 3920-2008; the dry rubbing fastness reached grade 4, and the wet rubbing fastness reached grade 3-4. It was evaluated after soap liquor washing for 30 minutes according to method A(1) of GB / T3921-2008 and repeating 5 times; there was no obvious fading. After washing with water for 20 minutes under the condition of 800 rpm and repeating the water washing 18 times, some fine lines of the embroidered pattern on the fabric appeared broken.

[0080] Example 3

[0081] An embroidered pattern printing process includes the following steps:

[0082] S1, Coating the EVA / TPU composite hot melt adhesive on the release layer to prepare a hot melt adhesive layer; the specific preparation process of the hot melt adhesive layer is the same as that of Example 1.

[0083] S2, Performing UV inkjet printing on the hot melt adhesive layer to form a printed pattern, and laminating a protective layer on the surface of the hot melt adhesive layer;

[0084] Specifically: Tear off the 25um release film on the surface of the film, perform UV inkjet printing on the hot melt adhesive layer through a UV digital printer, the ink is selected from the UV curable ink of Zhuhai Tianwei Company, and a UV lamp (365nm, 25W) is arranged on the inkjet printing component in the UV digital printer, and the UV lamp moves synchronously with the printing nozzle to instantaneously cure the printed ink; after printing, cover with a PE protective film to obtain a hot melt adhesive film with a pattern.

[0085] S3, Removing the release layer located at the bottom surface of the hot melt adhesive layer, laminating the hot melt adhesive layer on the textile at 150°C, tearing off the protective layer and separating the hot melt adhesive layer in the non-pattern area from the printed pattern with the protective layer, and performing flat pressing to obtain a textile with an embroidered pattern printing.

[0086] Specifically: Place the cotton fabric on a workbench at 150°C, tear off the 50um heavy release film under the hot melt adhesive film with a pattern, laminate the hot melt adhesive film on the cotton fabric, tear off the PE protective film, at this time the pattern will be completely bonded to the textile, and the excess hot melt adhesive around the pattern will transfer to the protective film to achieve the effect of waste discharge. Then cover the isolation cloth on the surface of the pattern and perform flat pressing for 2s while it is hot, with a pressure of 0.5Mpa, to obtain a textile with an embroidered pattern printing.

[0087] The obtained product is as Figure 4As shown, it can prepare a printed pattern with both embroidery and three-dimensional icon effects at one time, and the effect of the embroidery pattern is vivid and the lines are clear. The color fastness of dry rubbing and wet rubbing of this product is tested according to the method of GB / T 3920-2008; the dry rubbing fastness reaches level 3-4, and the wet rubbing fastness reaches level 3. It is washed with soap solution for 30 minutes according to method A(1) of GB / T 3921-2008 and repeated 5 times for evaluation, and there is no obvious fading. After washing with water for 20 minutes under the condition of 800 rpm and repeating the water washing 16 times, some fine lines of the embroidered pattern on the fabric are broken.

[0088] Example 4

[0089] An embroidered imitation printing process, which is different from Example 1 in that the components of the EVA / TPU hot-melt adhesive coating are: 15 parts of TPU, 45 parts of EVA, 10 parts of polyvinyl acetate, 8 parts of polyurethane resin, 3 parts of LDPE, 2 parts of polypropylene, 3 parts of dispersant, 3 parts of wetting agent, 3 parts of curing agent, 2 parts of leveling agent, and 20 parts of solvent.

[0090] The printed product obtained in this example also has a good three-dimensional embroidery effect, and its color fastness to dry and wet rubbing and water washing performance are comparable to those of Example 1.

[0091] The above examples of the present invention are merely examples for clearly illustrating the present invention, rather than limiting the embodiments of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to enumerate all the embodiments here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. An imitation embroidery printing process, characterized in that, It includes the following steps: S1. Coating an EVA / TPU composite hot melt adhesive on a release layer to prepare a hot melt adhesive layer; S2. Performing UV inkjet printing on the hot melt adhesive layer to form a printed pattern, and laminating a protective layer on the surface of the hot melt adhesive layer; S3. Removing the release layer located at the bottom surface of the hot melt adhesive layer, laminating the hot melt adhesive layer on a textile at 100 - 150 °C, tearing off the protective layer and separating the hot melt adhesive layer in the non-pattern area from the printed pattern along with the protective layer, and performing flat pressing to obtain a textile with an embroidered-like print.

2. The imitation embroidery printing process according to claim 1, characterized in that In the EVA / TPU composite hot melt adhesive, the mass ratio of EVA to TPU is (1.4 - 3):

1.

3. The imitation embroidery printing process according to claim 2, wherein, The EVA / TPU composite hot melt adhesive includes the following components by mass: 15 - 25 parts of TPU, 35 - 45 parts of EVA, 0.5 - 2 parts of polypropylene, and 1 - 3 parts of LDPE.

4. The imitation embroidery printing process according to claim 3, wherein, The difference in melt flow rate between the EVA and the polypropylene is ≤ 20 g / min.

5. The imitation embroidery printing process according to claim 1, characterized in that In step S2, in the UV inkjet printing, the UV light band is 365 - 425 nm.

6. The imitation embroidery printing process according to claim 1 or 5, characterized in that, The UV inkjet printing includes a secondary UV irradiation process, and the secondary UV irradiation process is as follows: (1) First UV irradiation: The first UV light moves synchronously with the inkjet printing component, so that the inkjet-printed ink is instantaneously cured under the irradiation of the first UV light to form a printed pattern; (2) Second UV irradiation: A second UV light is provided downstream of the inkjet printing, and the printed pattern is cured and shaped under the irradiation of the second UV light.

7. According to the imitated embroidery printing process described in claim 1, it is characterized in that, In step S3, the pressure of the flat pressing is 0.1 - 0.8 Mpa, and the treatment time is 0.5 - 10 s.

8. The imitated embroidery printing process according to claim 1, wherein, The material of the textile is at least one of cotton fiber, hemp fiber, nylon fiber, acrylic fiber, polyester fiber or animal wool.

9. The embroidery-like printing process according to claim 1, characterized in that, The material of the protective layer is at least one of PE, PP, PVC or PS.

10. An embroidered imitation printed textile product, characterized in that, Prepared by the embroidered-like printing process according to any one of claims 1 - 9.

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