Semi-invisible decorative three-dimensional printed cup preparation process and product

Abstract

The invention relates to the technical field of bra cup processing, in particular to a semi-invisible decorative three-dimensional printed cup preparation process and a product, and the semi-invisible decorative three-dimensional printed cup preparation process comprises the following preparation steps: S1, pressing sandwich cotton and an inner fabric through a thermocompression bonding process, and then carrying out stamping shaping treatment to obtain the contour shape of a cup; s2, the pyrography three-dimensional pattern is transferred to the surface of the sandwich cotton through heat transfer printing; s3, covering the surface of the pyrography three-dimensional pattern with a transparent composite fabric, and performing press fit through a hot press fit process, so that the transparent fabric covers the pattern and is connected with the sandwich cotton to obtain a semi-invisible decorative three-dimensional printed cup; the heat transfer printing technology is adopted to transfer the heat transfer printing three-dimensional patterns to the surface of the sandwich cotton, the heat transfer printing patterns have a certain three-dimensional sense, the visual effect of the bra can be effectively improved, and after the transparent fabric covers the surfaces of the heat transfer printing three-dimensional patterns, the patterns are protected, and the overall layering sense and three-dimensional sense are enhanced through the semi-invisible effect.

Description

Technical Field

[0001] The present application relates to the technical field of underwear cup processing, and more specifically, to a preparation process and product of a three-dimensional printed cup with semi-invisible decoration. Background Art

[0002] Bras are an indispensable part of women's daily lives, providing not only support and comfort but also contouring the body. Bras primarily consist of shoulder straps, cups, back straps, and a back clasp. The cups are a key component of a bra, directly enveloping the breasts. Different cup shapes are suitable for different breast shapes, providing support and shaping.

[0003] With the continuous improvement of women's aesthetic concepts, the aesthetics of bras has become an important consideration. In modern bra design, lace and mesh materials are widely used in bra design due to their lightness and breathability, as well as the romantic and sexy temperament presented by perspective, embroidery and other techniques. However, this design also has some limitations. Lace and mesh materials are relatively thin and easy to be snagged or scratched during daily wear, causing damage. In addition, the lace parts of lace and mesh materials are easy to deform after long-term use, washing or sun exposure, and it is difficult for flat designs to achieve the ideal three-dimensional presentation effect, and it is impossible to fully express personalized creative concepts. Therefore, it is urgent to develop a new solution to overcome these problems. Summary of the Invention

[0004] In order to solve the problem that bras cannot take into account both functionality and aesthetics at the same time, the present application provides a preparation process and product of a semi-invisible decorated three-dimensional printed cup.

[0005] In a first aspect, the present application provides a process for preparing a three-dimensional printed cup with semi-invisible decoration, which adopts the following technical solution: A process for preparing a three-dimensional printed cup with semi-invisible decoration includes the following steps: S1, pressing the sandwich cotton and the inner fabric through a heat pressing process, and then performing a stamping and shaping process to obtain the outline shape of the cup; S2, transferring the heat transfer 3D pattern to the surface of the sandwich cotton by heat transfer; S3, covering the surface of the heat-printed three-dimensional pattern with a transparent composite fabric, and then laminating the surface with a heat-pressing process, so that the transparent fabric covers the pattern and is connected to the sandwich cotton, thereby obtaining a three-dimensional printed cup with a semi-invisible decoration; The transparent composite fabric is prepared by the following method: The high elastic filler is coated on the surface of the substrate and solidified to form a high elastic filler layer, which is then coated and pressed with the transparent breathable fabric. The substrate is removed, and finally a breathable hot melt adhesive film is applied to the side of the high elastic filler layer away from the transparent breathable fabric to obtain a transparent composite fabric. The high-elastic filling material is prepared from the following raw materials in parts by weight: 100 parts of vinyl silicone oil 5 - 10 parts of hydroxy silicone oil 0.2 - 0.4 parts of catalyst 0.1 - 0.3 parts of inhibitor 4 - 6 parts of foaming agent 10 - 15 parts of polyethylene powder.

[0006] This solution realizes a three-dimensional printing effect of semi-invisible decoration through the combination of a heat transfer three-dimensional pattern and a transparent fabric. The heat transfer three-dimensional pattern itself has rich layering and three-dimensionality, and the coverage of the transparent fabric further enhances the visual effect of the pattern, making it beautiful. At the same time, it is fixed on the surface of the sandwich cotton through a heat transfer process, and then covered and laminated with a transparent fabric. This process can not only protect the pattern, but also maintain the three-dimensionality and stability of the pattern through the support of the high-elastic filling layer of the transparent fabric and the breathable hot melt adhesive film. Even after multiple washes and sun exposures, the possibility of pattern deformation can be reduced.

[0007] In this application, vinyl silicone oil, hydroxy silicone oil, catalyst, inhibitor, foaming agent, and polyethylene powder are used synergistically, making the high-elastic filling layer have good flexibility and elasticity, reducing damage caused by snagging or scratching. At the same time, it ensures its semi-invisible effect and increases the three-dimensionality of the pattern, enhancing the overall beauty of the bra. In addition, the microporous structure generated by the foaming agent maintains the breathability of the high-elastic filling layer. Adding an appropriate amount of polyethylene powder can adjust the transparency of the high-elastic filling layer. The hot melt adhesive film is coated on the surface of the high-elastic filling layer after being heated and melted, and forms an adhesive layer after cooling and curing, ensuring the firm combination of the transparent fabric with the sandwich cotton layer and the pattern layer. At the same time, the hot melt adhesive film itself has breathability and does not hinder air circulation. That is, the transparent composite fabric formed by the transparent breathable fabric, the high-elastic filling layer, and the breathable hot melt adhesive film has good breathability, making the cup have good breathability and improving the wearing comfort of the cup.

[0008] Preferably, the curing temperature of the high-elastic filling material is 140 - 160 °C, and the time is 20 - 30 min.

[0009] By adopting the above technical solution, optimizing the curing temperature and time, ensuring that vinyl silicone oil and hydroxy silicone oil undergo a cross-linking reaction under the action of a catalyst to form a network structure with high elasticity and good mechanical properties, which can withstand repeated stretching and compression without deformation. At the same time, it ensures that the foaming agent decomposes to form a microporous structure during the curing process, endowing the high-elastic filling layer with good breathability. In addition, it promotes the melting of polyethylene, increases the semi-invisible effect of the transparent fabric and the three-dimensionality of the high-elastic filling layer, and improves the overall beauty of the bra.

[0010] Preferably, the breathable hot melt adhesive film is one of a TPU hot melt adhesive film, a PA hot melt adhesive film, a PES hot melt adhesive film, a PO hot melt adhesive film or an EVA hot melt adhesive film.

[0011] By adopting the above technical solution, the type of the breathable hot melt adhesive film is optimized, the bonding stability between the sandwich cotton and the transparent composite fabric is further enhanced, the cup is ensured not to delaminate during use, and good air permeability is ensured at the same time.

[0012] Preferably, the breathable fabric is made of a transparent microporous fiber material.

[0013] By adopting the above technical solution, the transparent microporous fiber material has a high light transmittance, usually up to 80%-90%, and at the same time maintains good haze, and can create a hazy beauty. This characteristic enables it to achieve a semi-invisible effect in bra design, retaining the romantic and sexy qualities of lace and mesh while enhancing the overall aesthetics. Good air permeability is achieved through the microporous structure, and the pore diameter is usually between 0.08μm and 5μm, which can effectively block bacteria and particulate matter while allowing water vapor to pass through. The air permeability and waterproofness of this material keep it dry during wearing, reduce the stuffy feeling, and improve comfort.

[0014] Preferably, the sandwich cotton is sequentially made by a lamination process including a high-density compressed cotton layer, a support layer and a low-density fluffy layer.

[0015] By adopting the above technical solution, the high-density compressed cotton layer, the support layer and the low-density fluffy layer are tightly combined to form an integral structure, which plays a good supporting role for the cup and can increase the structural stability of the cup. The high-density compressed cotton layer is located at the bottom of the sandwich cotton, has a high density and hardness, can provide a solid support for the whole structure, ensure the stability of the bra during wearing, and the high-density compressed cotton layer is treated by high-temperature setting and has a high anti-deformation ability, and can withstand the stretching during daily wearing. The support layer is located in the middle and plays a connecting role. It can enhance the mechanical properties of the whole sandwich cotton and ensure the integrity of the structure. The existence of the support layer can effectively prevent the bra from collapsing during long-term use and maintain the three-dimensional sense and stiffness of the bra. The support layer usually adopts a fibrous material with a certain porosity to ensure the air circulation and improve the wearing comfort. The low-density fluffy layer is located on the outermost layer of the sandwich cotton, has good softness and elasticity, and can provide a comfortable wearing experience. At the same time, the porous structure of the density fluffy layer can effectively absorb the moisture on the skin surface, keep dry, promote air circulation, and reduce the stuffy feeling.

[0016] Preferably, the support layer is a needled non-woven fabric, and the needling density is 150-200 needles per square meter.

[0017] Needle-punched non-woven fabric forms tight entanglement between fibers through the needle-punching process. The increase in needle-punching density can significantly improve the tensile strength and tear strength of the material. At a needle-punching density of 150 - 200 punches per square meter, the friction and cohesion between fibers are enhanced, making the support layer more resilient, better able to withstand external forces, thus providing stable support for the cup, maintaining its shape during long-term use, and avoiding deformation. The increase in needle-punching density will slightly reduce the thickness of the non-woven fabric, but the density range of 150 - 200 punches per square meter can maintain a certain fluffiness while ensuring strength. This fluffiness helps improve the comfort of the bra and does not affect breathability due to excessive compression.

[0018] Preferably, in step S1, the temperature of the hot pressing process is 125 - 150 °C, and the time is 40 - 60 seconds.

[0019] By adopting the above technical solution, at a temperature of 125 - 150 °C, the hot pressing process can fully soften the fibers between the sandwich cotton and the inner fabric, thus achieving tight bonding, enhancing the overall structural strength and stability of the sandwich cotton, preventing the sandwich cotton and the inner fabric from loosening or deforming during use, and ensuring the durability of the cup.

[0020] Preferably, in step S3, the temperature of the hot pressing process is 140 - 160 °C, and the time is 30 - 60 seconds.

[0021] By adopting the above technical solution, the transparent fabric and the sandwich cotton can be tightly combined to form an integral structure, thereby enhancing the overall stability of the cup. This process can effectively prevent the materials from loosening or deforming during use, ensuring the durability of the cup. At the same time, the temperature range of 140 - 160 °C will not damage the porous structure of the transparent fabric, thus maintaining its breathability and comfort. This process can ensure that the materials will not melt excessively during bonding, thus retaining the internal air channels and enhancing the wearing experience.

[0022] In a second aspect, the present application provides a three-dimensional printed cup with semi-invisible decoration, adopting the following technical solution: A three-dimensional printed cup with semi-invisible decoration is prepared by the preparation process of the three-dimensional printed cup with semi-invisible decoration described in the first aspect. The three-dimensional printed cup with semi-invisible decoration includes, from the outer surface to the inner surface, a transparent composite fabric layer, a sandwich cotton layer, and an inner fabric layer arranged in sequence. A three-dimensional pattern layer is provided between the transparent composite fabric layer and the sandwich cotton layer. The transparent composite fabric layer includes, from the outer layer to the inner layer, a transparent breathable layer, a highly elastic filling layer, and a breathable hot melt adhesive film in sequence. The three-dimensional pattern layer is provided between the breathable hot melt adhesive film and the sandwich cotton layer.

[0023] The three-dimensional printed cup with semi-transparent decoration can effectively improve the overall aesthetics and comfort of the underwear. The high-elastic filling layer in the transparent composite fabric layer is made of silicone foam material, which not only has good elasticity and support, but also can reduce the sense of compression, making the wearing more fitting and comfortable. At the same time, the three-dimensional pattern can achieve the display effect of the three-dimensional pattern. This design breaks through the limitations of traditional flat lace and mesh, and can better display personalized creative concepts, meeting the high requirements of modern women for the aesthetics of bras. This design not only meets the user's pursuit of beauty, but also takes into account the convenience and durability of daily use. The silicone foam material has good elasticity and stability, and can maintain its shape without deformation after multiple washings and sun exposures. The breathable layer design of the transparent composite fabric layer, combined with the softness of the high-elastic filling layer, not only improves the comfort of the bra, but also maintains good breathability. The design of this multi-layer structure takes into account the comfort of wearing while meeting the aesthetic requirements.

[0024] In summary, the present application has the following beneficial effects: 1. The hot stamping three-dimensional pattern is transferred to the surface of the sandwich cotton through the heat transfer technology. The hot stamping pattern itself has a certain three-dimensional sense, which can effectively improve the visual effect of the bra. After the transparent fabric covers the surface of the hot stamping three-dimensional pattern, it not only protects the pattern, but also enhances the overall sense of hierarchy and three-dimensionality through the semi-transparent effect.

[0025] 2. The high-elastic filler is coated on the transparent breathable fabric and cured to form a high-elastic filling layer. This filling layer has good flexibility and wear resistance, and can effectively prevent snagging and scratching.

[0026] 3. The transparent fabric and the sandwich cotton are combined through the hot pressing process to form an integral structure. This process can effectively prevent the deformation of the pattern and the fabric during use. The high-elastic filling layer has good elasticity and recovery performance, and can resist deformation to a certain extent. Detailed implementation mode Embodiment

[0027] The vinyl silicone oil was purchased from Laiyang Shengbang Organosilicon Technology Co., Ltd., and the product is SI-208 vinyl silicone oil.

[0028] The hydroxyl silicone oil was purchased from Laiyang Shengbang Organosilicon Technology Co., Ltd., and the product is SI-205 hydroxyl silicone oil.

[0029] The catalyst is a platinum catalyst, purchased from Guangdong Wengjiang Chemical Reagent Co., Ltd., and the model is PB07391.

[0030] The polyethylene powder was purchased from Dongguan Jingke High Polymer Co., Ltd., and the model is MN71020.

[0031] The TPU hot melt adhesive film was purchased from Jiangsu Huifeng Environmental Protection Technology Co., Ltd., with the product number 38 - 63.

[0032] In Examples 1 - 3, the structure of the sandwich cotton is two cotton cloth surface layers and a silk core layer arranged between the two cotton cloth surface layers. The PET staple fiber material has a single fiber fineness of 0.9ex. The weaving warp density of the silk core layer is 20 warp ends / cm for the ground warp, 10 warp ends / cm for the pile warp, the weft density is 15 picks / cm, the core material height is 1mm, and the thickness of the cotton cloth surface layer is 0.3mm.

[0033] Example 1 A three - dimensional printed cup with semi - invisible decoration includes, from the outer surface to the inner surface, a transparent composite fabric layer, a sandwich cotton layer, and an inner fabric layer with a thickness of 0.01mm. A three - dimensional pattern layer is provided between the transparent composite fabric layer and the sandwich cotton layer. The transparent composite fabric layer includes, from the outer layer to the inner layer, a transparent breathable layer, a high - elasticity filling layer, and a breathable hot melt adhesive film. The three - dimensional pattern layer is arranged between the breathable hot melt adhesive film and the sandwich cotton layer and is prepared by the following method: S1. Press the sandwich cotton and the inner fabric through a hot pressing process. The temperature of the hot pressing process is 125°C and the time is 40 seconds, and then perform stamping and shaping treatment to obtain the contour shape of the cup; S2. Transfer the hot stamping three - dimensional pattern to the surface of the sandwich cotton through heat transfer. The heat transfer temperature is 120°C and the time is 15 seconds; S3. Cover the transparent composite fabric on the surface of the hot stamping three - dimensional pattern and then press it through a hot pressing process. The temperature of the hot pressing process is 140°C and the time is 60 seconds, so that the transparent fabric covers the pattern and is connected to the sandwich cotton to obtain a three - dimensional printed cup with semi - invisible decoration; The transparent composite fabric is prepared by the following method: Coat the high - elasticity filling material on the surface of the substrate, and the coating amount is 50g / m 2 , after curing, form a high - elasticity filling layer, then coat and press it with a transparent breathable fabric with a thickness of 0.01m, remove the substrate, and finally attach a breathable hot melt adhesive film (TPU hot melt adhesive film) with a thickness of 0.0001mm on the side of the high - elasticity filling layer away from the transparent breathable fabric to obtain the transparent composite fabric; The breathable fabric is made of a transparent microporous fiber material, such as polytetrafluoroethylene microporous fiber, and the pore diameter is usually 0.08μm.

[0034] The high - elasticity filling material is prepared by the following method: Mix 1000g of vinyl silicone oil, 50g of hydroxyl silicone oil, 2g of catalyst, 1g of inhibitor (tert - butyl hydroperoxide), 40g of blowing agent (triethylsilanol), and 100g of polyethylene powder evenly to obtain the high - elasticity filling material.

[0035] Example 2-3 is different from Example 1 in that the types, dosages, and parameters of the raw materials for preparing the semi-invisible decorative three-dimensional printed cup are different. The specific differences are shown in Table 1 and Table 2: Table 1 Types, dosages, and parameters of the raw materials for preparing the semi-invisible decorative three-dimensional printed cup in Examples 1-3 Table 2 Types, dosages, and parameters of the raw materials for preparing the high-elasticity filler in Examples 1-3 Example 4 A semi-invisible decorative three-dimensional printed cup. The difference between this example and Example 1 is that the sandwich cotton sequentially includes a high-density compressed cotton layer (with a density of 45 kg / m 3 ), a support layer, and a low-density fluffy cotton layer (with a density of 18 kg / m 3 ) which are obtained by a lamination process. The support layer is a PET needle-punched non-woven fabric with a needle punching density of 150 needles / ㎡.

[0036] Example 5 A semi-invisible decorative three-dimensional printed cup. The difference between this example and Example 1 is that the sandwich cotton sequentially includes a high-density compressed cotton layer with a thickness of 0.3 mm (with a density of 45 kg / m 3 ), a support layer with a thickness of 0.1 mm, and a low-density fluffy cotton layer with a thickness of 0.3 mm (with a density of 18 kg / m 3 ) which are obtained by a lamination process. The support layer is a PET needle-punched non-woven fabric with a needle punching density of 200 needles / ㎡.

[0037] Example 6 A semi-invisible decorative three-dimensional printed cup. The difference between this example and Example 1 is that in step S1, after spot-coating a waterproof glue on the surface of the inner fabric, it is then thermally laminated with the sandwich cotton, and the thickness of the waterproof glue is 0.0001 mm.

[0038] Example 7 A semi-invisible decorative three-dimensional printed cup. The difference between this example and Example 1 is that the curing temperature of the high-elasticity filler is 180°C.

[0039] Example 8 A semi-invisible decorative three-dimensional printed cup. The difference between this example and Example 1 is that the curing temperature of the high-elasticity filler is 130°C.

[0040] Example 9 A semi-invisible decorative three-dimensional printed cup. The difference between this example and Example 1 is that the temperature of the thermal lamination process in step S3 is 130°C.

[0041] Example 10 A three-dimensional printed cup with semi - invisible decoration. The difference between this example and Example 1 is that: the temperature of the hot pressing process in step S3 is 170 °C.

[0042] Comparative Example Comparative Example 1 A three-dimensional printed cup with semi - invisible decoration. The difference between this comparative example and Example 1 is that: S1. Sandwich cotton and inner fabric are pressed through a hot pressing process; S2. The hot stamping three - dimensional pattern is transferred to the surface of the sandwich cotton through heat transfer; S3. A transparent fabric is covered on the surface of the hot stamping three - dimensional pattern, and then pressed through a hot pressing process again, so that the transparent fabric covers the pattern and is connected to the sandwich cotton, and then stamping and shaping treatment is carried out to obtain the contour shape of the cup, and a three - dimensional printed cup with semi - invisible decoration is obtained.

[0043] Comparative Example 2 A three - dimensional printed cup with semi - invisible decoration. The difference between this comparative example and Example 1 is that: the transparent composite fabric is prepared by the following method: A high - elastic filler is coated on the surface of the substrate. After curing, a high - elastic filler layer is formed. The substrate is removed, and then a breathable hot - melt adhesive film is laminated to obtain the transparent composite fabric.

[0044] Comparative Example 3 A three - dimensional printed cup with semi - invisible decoration. The difference between this comparative example and Example 1 is that: ordinary sponge is used to replace the sandwich cotton with the same thickness.

[0045] Comparative Example 4 A three - dimensional printed cup with semi - invisible decoration. The difference between this comparative example and Example 1 is that: no polyethylene powder is added.

[0046] Comparative Example 5 A three - dimensional printed cup with semi - invisible decoration. The difference between this comparative example and Example 1 is that: the high - elastic filler layer is removed.

[0047] Testing Method / Experimental Method Haze Test: Use a haze meter with a 0 / d measurement structure. The temperature is controlled at 23 ± 2 °C, and the relative humidity is maintained at 50 ± 5%. Place the transparent composite fabric on the haze meter for testing. An ideal semi - invisible fabric should have a certain haze, which can hide the pattern details and maintain a certain sense of transparency. Therefore, the haze value is preferably between 10 - 30%.

[0048] Air Permeability Test: Use an air permeability tester and measure the air permeability according to the standard method ASTM D73.

[0049] Snagging and Scratching Test: Simulate the daily wearing environment and conduct a snagging test on the bra using a standard snagging test device. Meanwhile, use a scratching testing machine to test the scratch resistance of the bra surface and observe whether it is easily snagged or scratched.

[0050] Water Resistance Test: Place the three-dimensional printed cups with semi-invisible decoration prepared in Examples 1-6 and Comparative Examples 1-4 in a washing machine and wash for 12 hours. Observe whether the cup is deformed and whether the three-dimensional pattern is deformed.

[0051] Adhesion Strength Test: 1) Use a peel strength tester to measure the adhesion strength after thermocompression bonding at the joint between the sandwich cotton and the transparent fabric.

[0052] 1. Use a peel strength tester to measure the adhesion strength after thermocompression bonding at the joint between the sandwich cotton and the inner fabric.

[0053] The test data is shown in Table 3: Table 3 Experimental data of Examples 1-10 and Comparative Examples 1-5 By comparing Example 1 with Comparative Examples 1-5, among them, the haze value in Comparative Example 1 is relatively high and the air permeability is poor; scratching phenomenon occurs in Comparative Example 2; the air permeability is poor in Comparative Example 3, and both the cup and the pattern are deformed and 2) the peel strength is low; the haze value is relatively low in Comparative Example 4; the haze value is low in Comparative Example 5, and both the cup and the pattern are deformed. That is, from the experimental data of Example 1 and Comparative Examples 1-5, it can be seen that through the preparation process in this application, the three-dimensional printed cup with semi-invisible decoration has a good effect of semi-invisible three-dimensional pattern, and at the same time has good wear resistance and scratch resistance, can be used for a long time without deformation, and has good structural stability and air permeability.

[0054] By comparing Example 1 with Examples 4-5, the air permeability of Examples 4-5 increases, 1) the peel strength increases, 2) the peel strength increases, indicating that by optimizing the structure of the sandwich cotton, it is beneficial to improve the air permeability and structural stability of the three-dimensional printed cup with semi-invisible decoration.

[0055] By comparing Example 1 with Example 6, 2) the peel strength increases in Example 6, indicating that by adding waterproof glue, it is beneficial to improve the structural stability of the three-dimensional printed cup with semi-invisible decoration.

[0056] By comparing Example 1 with Examples 7-8, the haze value increases in Example 7; the haze value decreases and the air permeability decreases, 1) the peel strength decreases in Example 8, indicating that by optimizing the curing temperature of the high-elastic filler, it is beneficial to improve the structural stability and air permeability of the three-dimensional printed cup with semi-invisible decoration and adjust its haze.

[0057] Comparing Example 1 with Examples 9-10, 1) the peel strength decreases; the haze value increases and the air permeability decreases in Example 10, indicating that by optimizing the temperature of the hot pressing process in step S3, it is beneficial to improve the structural stability and air permeability of the semi-invisible decorative three-dimensional printed cup and adjust its haze.

[0058] This specific embodiment is only an interpretation of the present application, and it is not a limitation of the present application. Those skilled in the art can make modifications without creative contributions to this embodiment according to needs after reading this specification, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A preparation process for a three-dimensional printed cup with semi-invisible decoration, characterized in that, It includes the following preparation steps: S1. Press the sandwich cotton and the inner fabric through a hot pressing process, and then carry out stamping and shaping treatment to obtain the contour shape of the cup; S2. Transfer the heat transfer stereoscopic pattern to the surface of the sandwich cotton through heat transfer; S3. Cover the surface of the heat transfer stereoscopic pattern with a transparent composite fabric, and then carry out pressing through a hot pressing process, so that the transparent fabric covers the pattern and is connected to the sandwich cotton to obtain a semi-invisible decorative three-dimensional printed cup; The transparent composite fabric is prepared by the following method: Coat a high-elastic filler on the surface of the substrate, and after curing, form a high-elastic filling layer, then coat and press it with a transparent breathable fabric, remove the substrate, and finally bond a breathable hot-melt adhesive film on the side of the high-elastic filling layer away from the transparent breathable fabric to obtain the transparent composite fabric; The high-elastic filler is prepared from the following raw materials in parts by weight: 100 parts of vinyl silicone oil 5-10 parts of hydroxyl silicone oil 0.2-0.4 parts of catalyst 0.1-0.3 parts of inhibitor 4-6 parts of foaming agent 10-15 parts of polyethylene powder.

2. The preparation process of a semi-invisible decorative three-dimensional printed cup according to claim 1, characterized in that: The curing temperature of the high-elastic filler is 140-160 °C, and the time is 20-30 min.

3. The preparation process of a semi-invisible decorative three-dimensional printed cup according to claim 1, characterized in that: The breathable hot-melt adhesive film includes one of TPU hot-melt adhesive film, PA hot-melt adhesive film, PES hot-melt adhesive film, PO hot-melt adhesive film or EVA hot-melt adhesive film.

4. The preparation process of a semi-invisible decorative three-dimensional printed cup according to claim 1, characterized in that: The breathable fabric is made of a transparent microporous fiber material.

5. The preparation process of a semi-invisible decorative three-dimensional printed cup according to claim 1, characterized in that: The sandwich cotton is sequentially obtained by pressing a high-density compressed cotton layer, a support layer and a low-density fluffy layer.

6. The preparation process of a semi-invisible decorative three-dimensional printed cup according to claim 5, characterized in that: The support layer is a needle-punched non-woven fabric, and the needle punching density is 150-200 needles / m².

7. The preparation process of a semi-invisible decorative three-dimensional printed cup according to claim 1, characterized in that: In step S1, the temperature of the hot pressing process is 125-150 °C, and the time is 40-60 seconds.

8. The preparation process of a semi-invisible decorative three-dimensional printed cup according to claim 1, characterized in that: In step S3, the temperature of the hot pressing process is 140-160 °C, and the time is 30-60 seconds.

9. The preparation process of a semi-invisible decorative three-dimensional printed cup according to claim 1, characterized in that: In step S1, after dot-coating waterproof glue on the surface of the inner fabric, then carry out hot pressing with the sandwich cotton.

10. A three-dimensional printed cup with semi-invisible decoration, characterized in that, It is prepared by the preparation process of the semi-invisible decorative three-dimensional printed cup according to any one of claims 1-9. The semi-invisible decorative three-dimensional printed cup includes a transparent composite fabric layer, a sandwich cotton layer and an inner fabric layer arranged in sequence from the outer surface to the inner surface. A three-dimensional pattern layer is arranged between the transparent composite fabric layer and the sandwich cotton layer. The transparent composite fabric layer sequentially includes a transparent breathable layer, a high-elastic filling layer and a breathable hot-melt adhesive film from the outer layer to the inner layer. The pattern layer is arranged between the breathable hot-melt adhesive film and the sandwich cotton layer.

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