A multi-layer 3D effect coated fabric and its production process and application

Abstract

The present invention belongs to the technical field of coated fabrics, and more specifically relates to a multi-layer 3D effect coated fabric and its manufacturing process and application. The present invention adopts a mold printing process to apply multiple thick layers of water-based PU or water-based PU modified resin coating on textile fabrics to obtain a multi-layer 3D effect coated fabric. The coating can form a three-dimensional coating effect with edge fluorescence and various regenerated fiber effects on the surface under different actual needs, and since the next thick coating is performed after an interval of 1-2 hours between multiple mold printings, the thickness of the coating can be as high as 5mm. The cross-section of the coating formed by the present invention can be arched, rectangular and / or trapezoidal, so that the 3D shape of the coating on the cloth can be changed according to actual needs to form various different effects. The present invention has no special requirements on the material, structure, etc. of the textile fabric base cloth, is easy to operate, and the obtained coated fabric is soft, wear-resistant and does not crack, which greatly enriches and expands the variety and application of multi-layer 3D coated fabrics.

Description

Technical Field

[0001] The present invention belongs to the technical field of coated fabrics, and more specifically relates to a multi-layer 3D effect coated fabric and a manufacturing process and application thereof. Background Art

[0002] With the improvement of people's living standards, fabrics with special appearance effects are becoming more and more diversified. One of them is to combine fabrics of various materials with processes different from textiles to present a strong 3D stereoscopic effect. Existing flexible coatings used to present the three-dimensional effect of fabrics, whether foamed or not, can only present a rounded arched cross section by hollow printing, screen printing or other printing processes. In addition, due to the poor rheological properties of the coating, the thickness of the coating can mostly be less than 1.5mm. Taking the screen printing process as an example, using the existing recycled fiber coating to print a thickness of 1.2mm on the fabric, it takes about 40 printings. From 1.2mm to 1.5mm thickness, it takes about 20 more printings. If you continue to print, the final coating thickness is still difficult to accumulate. The reason for the above situation is that the process characteristics of screen printing itself limit the superposition limit of the coating thickness. At the same time, the original water-based glue is easy to collapse on the surface after hollow printing, or there are burrs on the edge, and the wear resistance and bending resistance need to be improved.

[0003] More information related to the above technical solution can be found in the following documents.

[0004] Patent document 1 discloses a composite material of all-cotton laminated polyurethane film, comprising: a bottom layer and a surface layer; the bottom layer is a cotton terry cloth material; the surface layer is a polyurethane film; the polyurethane film is laminated with the cotton terry cloth material through a polyurethane resin. In the process of laminating the polyurethane film to the cotton fabric, after the polyurethane resin is applied to the polyurethane film in a dotted form, it must be heated in an oven to remove the solvent therein, leaving a solid adhesive with a real bonding effect, and then it is laminated with another material, cotton terry cloth, under certain temperature and pressure conditions, and after cooling, a composite material of all-cotton laminated polyurethane film is obtained. The thickness of the polyurethane film obtained by this technical solution cannot present a 3D stereoscopic effect, and cannot meet the requirements of high thickness of flexible fillers on textile fabrics.

[0005] Patent document 2 discloses a fabric color pigment with 3D effect and the application of the fabric color pigment. The fabric color pigment with 3D effect includes the following components by weight: 82.9-96.4 parts of water-soluble acrylic resin, 1-4 parts of ethylene glycol or propylene glycol, 0.5-2.0 parts of acrylic thickener, 0.1 parts of preservative kason, 1-10.0 parts of color powder or effect pigment; the pH value of the pigment is 7.0-8.0. After the fabric color pigment is applied on the fabric, it does not need to be dried. It can be washed with water as long as it is dried at room temperature for 72 hours, and the fabric color pigment cannot be washed off and has good water washing resistance. The dried fabric color pigment is obviously protruding on the surface of the fabric and has a good 3D effect. The 3D effect fabric color pigment in this patent is poor in terms of adhesion between the coating and the fabric because it uses acrylic resin, and it also has the disadvantages of acrylic resin being easy to age and crack and having poor color fastness.

[0006] Patent document 3 uses large particles of 0.01-0.1 mm to be evenly mixed with water-based polyurethane and isocyanate curing agent to form a coating, which is printed on cloth by screen printing. After drying, a cloth with a high degree of 0.1-0.3 mm particle coating can be obtained; this method has a certain reference role in the preparation of fine-grained particles and low-thickness coatings, but it is obviously not achievable when preparing a coarse particle effect with a particle size of more than 0.5 mm and a coating thickness of more than 2 mm.

[0007] Patent document 4 uses water-based polyurethane resin, foaming agent and auxiliary agent to make coating, adds curing agent and color ink for foaming when using, and prints on cloth through 2-4mm thick screen to obtain 3D stereoscopic printing coating with a thickness of 1-3mm; this method has a certain reference role in soft touch and high thickness printing; however, for high thickness coating printing, the coating used in this method must be foamed, and the coating needs to be printed within 30 minutes after foaming. The material preparation process is relatively complicated and the usable time is relatively short. Moreover, the article does not mention that other special effect pigments can be added to the coating to prepare a multi-layer multi-color three-dimensional structure; this is because the foaming coating has the characteristics of flow, and the edge will form an arc-shaped effect during the drying process. When the second high thickness printing is performed, the second coating will flow along the arc edge of the first layer and cover the effect of the first layer, so it is difficult to form a multi-layer high thickness printing.

[0008] Patent Document 5 uses water-based polyurethane, recycled fabric and isocyanate to mix into a coating, which is printed on the fabric and dried to form a coating with a height of 0.1-1 mm. This method focuses on the recycling of waste fabrics and is applied in the field of water-based coatings, but the thickness that can be prepared is only 0.1-1 mm. No further research has been done on the preparation of coatings with higher thicknesses, and there is no mention of adding other special effect pigments to the coating to prepare a multi-layer three-dimensional structure.

[0009] Patent document 1: CN201598514U “Composite material of cotton laminated with polyurethane film”;

[0010] Patent document 2: CN101962916B “Fabric color pigment and its application”;

[0011] Patent document 3: CN111235922A “A particle coated cloth and its preparation method”;

[0012] Patent document 4: CN111705527A “A 3D printed fabric and its preparation method”;

[0013] Patent document 5: CN112703233A "A recycled fiber coating paint containing waste cloth, coating and preparation method thereof". Summary of the invention

[0014] In view of the above technical problems existing in the background technology, it is necessary to provide a multi-layer 3D effect coated fabric and its production process and application, by combining special coatings with particles of different types and sizes or special effect pigments, using a hollow stencil with the same pattern position and gradually increasing thickness, to achieve precise positioning, and using the hollow stencil to print the coating on the base fabric from thin to thick, presenting a multi-layer 3D stereoscopic coating effect with a thickness of 0.5-5mm and multiple coatings and colors. In addition, the multi-layer 3D effect coating has excellent adhesion, wear resistance and bending resistance on the fabric.

[0015] To achieve the above object, in a first aspect of the present invention, the inventor provides a process for manufacturing a multi-layer 3D effect coated fabric, comprising the following steps:

[0016] S1. Prepare a substrate, a base fabric, a stencil with a hollow portion, a scraper and a coating;

[0017] S2, placing the base fabric on the substrate;

[0018] S3, placing the stencil plate on the base fabric;

[0019] S4, filling the coating into the hollow part of the stencil;

[0020] S5, scraping off the excess paint that has not entered the hollowed-out portion of the stencil plate with the scraper;

[0021] S6, curing shrinkage;

[0022] S7. Repeat steps S3 to S6 one to four times to obtain the multi-layer 3D effect coated fabric, wherein the hollowed-out thickness of the hollowed-out part of the stencil is 0.5-5.0 mm.

[0023] The present invention adopts a multi-pass thick coating process in conjunction with a stencil with a hollowed-out portion of a preset pattern shape to produce the multi-layer 3D effect coated fabric, and its basic operation steps are to repeat the stencil printing operation one to four times at the same position. After the previous thick coating is fully cured and shrunk, the next thick coating with the same shape of the hollowed-out portion of the stencil but different hollowed-out thickness (thicker than the previous one) is performed. It can be understood that the production process described in the present invention requires the preparation of multiple stencils with the same preset coating pattern shape but different hollowed-out thickness, and the stencils are sequentially stenciled in order from low to high thickness, and the thickest stencil is used for the last filling of the coating. In this way, the coating thickness obtained after sufficient curing and shrinkage is the final stencil thickness minus the thickness reduced after the coating is cured and shrunk. Of course, the specific number of repetitions of the stencil operation and the stencil with what hollowed-out thickness of each specific operation can be implemented according to actual needs.

[0024] Preferably, in step S7, the hollow thickness of the stencil selected in the subsequent operation step S3 is greater than the hollow thickness of the stencil selected in the previous operation step S3. In this way, by setting stencils with different hollow thicknesses, the stencils are selected in order of thickness from low to high for stencil printing, so that the coating obtained by stencil printing increases continuously in the vertical direction, achieving a multi-layer 3D stereoscopic effect.

[0025] Preferably, in step S6, except for the last repetition of steps S3 to S6, in step S6, the curing shrinkage temperature is 30-35° C. The curing shrinkage temperature will affect the performance and structure of the coating surface. When the curing shrinkage temperature is lower than 30° C., the coating surface dries too slowly, which is not conducive to the next mold printing construction; when the curing shrinkage temperature is higher than 35° C., the coating surface dries too quickly, the coating shrinkage probability increases, causing surface defects, such as orange peel, wrinkles, wavy lines, and collapse, which affect the next mold printing construction effect.

[0026] Preferably, except for the last repetition of steps S3 to S6, in step S6, the curing shrinkage time is 4-6 minutes. The length of the curing shrinkage time will affect the shrinkage of the coating edge. If the curing shrinkage time is less than 4 minutes, the coating cannot be dried on the surface, and the stencil cannot be used for printing again, which will cause the coating surface to collapse; if the curing shrinkage time is greater than 6 minutes, the drying time is too long, the coating edge will shrink, and a multi-layer three-dimensional coating with smooth edges and strong support cannot be formed.

[0027] Therefore, after a lot of practical comparisons and scientific verifications by the inventors, the curing and shrinking temperature of the intermediate process of the molding operation is set to 30-35°C, and the curing and shrinking time is set to 4-6min.

[0028] Preferably, when steps S3 to S6 are repeated for the last time, in step S6, the curing shrinkage temperature is 25-70°C and the curing shrinkage time is 48-168h. When the curing shrinkage temperature is lower than 25°C, the coating surface dries too slowly, reducing production efficiency; when the curing shrinkage temperature exceeds 70°C, it will affect the internal structure of the coating, thereby affecting the softness and other properties of the coating, and leading to an increase in the defect rate.

[0029] According to a preferred embodiment of the present invention, the coating comprises:

[0030] Water-based PU or water-based PU modified resin 76-91%;

[0031] pH adjuster 0.1-0.2%;

[0032] Defoaming agent 0.2-0.5%;

[0033] Dispersant 0.5-2%;

[0034] Fumed silica 1-3%;

[0035] Cellulose ether 0.5-1.0%;

[0036] Water-based thickener 0.6-2%;

[0037] Curing agent 3-5%;

[0038] The water-based PU or water-based PU modified resin is an aliphatic polyester polyurethane water-based dispersion, which has excellent flexibility, tensile strength, yellowing resistance and hydrolysis resistance. The pH regulator is an organic amine. The advantage of using organic amines is that on the one hand, the pH value of the system can be adjusted to control the overall rheology, and on the other hand, the wetting effect on cellulose ether and fumed silica powder can be increased to improve storage stability. The defoamer is a mixture of bubble-breaking polysiloxane and hydrophobic particles in polyethylene glycol, which can quickly and significantly eliminate bubbles generated during production and construction. The dispersant is a polyacrylate copolymer, which can quickly wet and disperse the powder, increase the uniformity of the system, and improve the shelf life of the product. The cellulose ether is hydroxypropyl or hydroxyethyl cellulose ether, which can adjust the thixotropy of the system and increase the spatial support effect. The water-based thickener is a hydrophobically modified water-based polyurethane or acrylate thickener, which can control the rheology of the system, first, it has better construction performance, second, it has better storage performance, and third, it can adjust the thickening combination to control the curvature of the edge of the flower position. The curing agent is a water-based isocyanate, aziridine or carbodiimide curing agent, which can improve the overall performance of the product, such as pressure resistance, flexibility resistance, and tension. The coating thus formed has excellent rheology, a thixotropy index of 5.5-7.0, good surface drying speed and curing shrinkage, and can be combined with the above-mentioned mold printing process to form a multi-layer 3D stereoscopic effect coating with strong adhesion, wear resistance, and high strength.

[0039] The slurry of the present invention uses a special water-based polyurethane dispersion, and through additives and rheology control, the coating has the characteristics of strong adhesion, fast surface drying, high thixotropy and strong system support structure. The special water-based polyurethane dispersion has strong adhesion to the base cloth, and the fast surface drying, high thixotropy and strong support structure can provide continuity of stencil printing. If the coating dries slowly, it will affect the construction of the next stencil (it will stick to the material; and the low thixotropic coating has too good fluidity, which will make the pattern larger after the last stencil printing, resulting in the next stencil being unable to be aligned for printing, and the resulting coating has a poor multi-layer effect. The strong support structure of the coating can increase the uprightness. On the one hand, it controls the fluidity of the coating pattern, which is beneficial to the printing of the next stencil; on the other hand, it is easy to control the shrinkage of the coating after drying.

[0040] According to a preferred embodiment of the present invention, the particle size of the fumed silica is 0.002-0.1 μm. Thus, by selecting fumed silica of different particle sizes to compound and achieve different high thixotropic combinations, it can provide obvious thixotropy and a three-dimensional spatial structure of the slurry system, playing a strong supporting role.

[0041] According to a preferred embodiment of the present invention, the coating further comprises 3-10% of pigment. The pigment may be selected from one or more of luminous powder, pearlescent effect pigment, water-based ink, rubber particles, recycled fiber and other powders or coatings with color effects or special functions within 1 mm in fineness. By adding the above-mentioned content of pigment, a multi-layer multi-color 3D stereoscopic effect coating with different effects such as but not limited to strong color contrast in each layer, pearlescent surface or transparent middle layer fluorescence, and fluorescence in the upper, middle and lower layers can be formed according to actual needs.

[0042] In the second aspect of the present invention, the inventor provides a multi-layer 3D effect coated fabric, which is prepared by the manufacturing process described in the first aspect of the present invention, wherein the cross-section of the multi-coating on the multi-coating fabric is arched, rectangular and / or trapezoidal, and the thickness of the multi-coating on the multi-coating fabric is 0.5-5mm. According to the above description, it can be imagined that the variable thickness range of the multi-coating on the multi-coating fabric of the present invention breaks through the coating thickness that can be achieved by the prior art, and the formed coating cross-section not only has various shapes, but also can form distinct layers of different color effects in the vertical direction.

[0043] In the third aspect of the present invention, the inventor provides an application of a multi-layer 3D effect coated fabric prepared by the manufacturing process described in the first aspect of the present invention. In this way, the multi-layer 3D effect coated fabric provided by the present invention can be widely used in, for example, but not limited to, clothing, shoes and bags, sofas, car interiors, furniture and soft furnishings, etc., greatly enriching the fabric selection in the above fields.

[0044] Different from the prior art, the above technical solution has at least the following beneficial effects:

[0045] The present invention solves the problem that the prior art needs to use foaming coatings for thick coating printing and cannot perform multi-layer and high-thickness printing by adjusting the rheological properties and supporting properties of the coating. The present invention can prepare a high-thickness (0.5-5mm) coating on the fabric without the need for foaming coatings, and the use time can be controlled within 8 hours, extending the use time and facilitating efficient production. Here, "use time" refers to the activation period of the prepared coating slurry, that is, the time the slurry can be used normally to maintain effective performance. Relatively speaking, the use time of the foaming slurry is within 30 minutes, and the use time of the two-component slurry product is within 4 hours. Exceeding the use time will affect the slurry construction and the performance of the formed product. Pigments with different special effects can also be added to the coating provided by the present invention to prepare a multi-layer and multi-color three-dimensional effect.

[0046] The present invention adopts a mold printing process to apply multiple thick coats of water-based PU or water-based PU modified resin coating on textile fabrics to obtain a multi-layer 3D effect coating. The coating can form three-dimensional multi-coating effects such as edge fluorescence and various fiber effects on the surface under different actual needs, and since the surface is dried between multiple mold printings before the next thick coating, the thickness of the coating can be as high as 5mm. By adopting the special process of the present invention and pre-making different mold plates according to needs, the cross-section of the coating formed can be arched, rectangular and / or trapezoidal, so that the 3D shape of the coating on the cloth can be changed according to actual needs to form various different effects. The mold printing process in the present invention has no special requirements for the material, structure, etc. of the textile fabric base cloth, is easy to operate, and the obtained multi-layer 3D effect coated fabric coating is soft, wear-resistant and does not crack. Under the condition of pre-design, the varieties and applications of fabrics with special appearance effects are greatly enriched and expanded. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 This is a rendering of a multi-layer 3D effect coating (two layers) fabric described in a specific implementation method;

[0048] Figure 2 This is a rendering of a multi-layer 3D effect coating (three layers) fabric described in a specific implementation method;

[0049] Figure 3 This is another effect diagram of a multi-layer 3D effect coating (two layers) fabric described in the specific implementation method;

[0050] Figure 4 This is another effect diagram of a multi-layer 3D effect coating (four layers) fabric described in a specific implementation method. DETAILED DESCRIPTION

[0051] In order to explain the technical content, structural features, achieved objectives and effects of the technical solution in detail, the following is a detailed description in conjunction with specific embodiments and accompanying drawings. It should be understood that these embodiments are only used to illustrate the present application and are not used to limit the scope of the present application.

[0052] In the present invention, terms indicating ordinal numbers such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship of quantity, priority or sequence between these entities or operations.

[0053] The substrate referred to in the present invention refers to the facility on which the base fabric is placed to carry out the various production process steps of the multi-layer 3D effect coated fabric. It is required to be dry, flat and clean. Examples include but are not limited to metals such as aluminum, steel and titanium, engineering plastics such as polystyrene, polycarbonate, polyurethane, polypropylene, polyethylene and polyamide, rubber and elastomers, glass, ceramic materials, clay and minerals, textiles and leather, or compositions such as but not limited to glass fiber, carbon fiber, polypropylene fiber and aromatic polyamide fiber composite materials.

[0054] The base fabric in the present invention serves as a coating carrier and also as a fabric body, and the fiber material of the base fabric can include any type of woven fabric, nonwoven fabric or knitted fabric separately. Woven fabrics can be made using the technology of using any fabric organization known in the art, such as plain weave, ramie weave, square weave, satin weave, twill weave, three-dimensional woven fabrics and any several variants of these technologies. Knitted fabric structure is a structure consisting of intermeshing loops, wherein four main types are tricot warp knitted fabrics, raschel warp knitted fabrics, reticulated and directional structures. Nonwoven fabrics refer to textile structures produced by bonding and / or interlocking randomly oriented fibers into a net or mat realized by mechanical, chemical, thermal or solvent means and combinations thereof.

[0055] The stencil plate is different from the screen printing plate. It can be made of glass, acrylic and other materials, and a laser is used to punch a preset pattern to form a specific hollow part. In particular, for the same preset pattern, one to four plates are required, and the thickness of the hollow part in the first to fourth plates is 0.5-5.0mm.

[0056] Water-based PU or water-based PU modified resin is an aliphatic polyester polyurethane aqueous dispersion. In the specific embodiment of the present invention, Wanhua 8407, which contains 49-50% non-volatile components and has a pH value of 7-9.

[0057] The pH adjuster is an organic amine, which may include N-octadecylpropylene diamine, N-cyclohexylpropylene diamine, trimethylamine, and AMP-95 (2-amino 2-methyl-1-propanol). In the specific embodiment of the present invention, DOW's AMP-95 is preferred, which has a neutralization equivalent of 93-97 and a pH value of 6.7.

[0058] The defoamer is a mixture of foam-breaking polysiloxane and hydrophobic particles in polyethylene glycol. BYK-024 from BYK is preferred in the specific embodiment of the present invention.

[0059] The dispersant is a polyacrylate copolymer, and the preferred embodiment of the present invention is TEGO755W produced by Digo Company, with a pH value of about 6.5 and an active ingredient content of 40%.

[0060] The particle size of the fumed silica is 0.002-0.1 μm. In the specific embodiment of the present invention, Evonik A200 is preferred, and the particle size is 12 nm.

[0061] The cellulose ether is hydroxypropyl or hydroxyethyl cellulose ether, and in the specific embodiment of the present invention, Ashland 250LR is preferred, 5% aqueous solution, mPa.s (cps): 75-150; pH value (1% aqueous solution) is 6.0-8.5, and length is 50-100 μm.

[0062] The water-based thickener is a hydrophobically modified water-based polyurethane or an acrylate thickener. The hydrophobically modified polyurethane in the specific embodiment of the present invention is preferably Wanhua U604, which is transparent to light milky liquid in appearance, has a solid content of 24-26%, and a pH value of 6-7. The acrylate thickener in the specific embodiment of the present invention is preferably DOWASE-60, which has a solid content of 28% and a pH value of 3.5.

[0063] The special effect pigment is one or more of luminous powder, pearlescent effect pigment, water-based ink, rubber particles, recycled fiber and other powders or slurries with color effects or special functions within 1 mm in fineness. In the specific embodiment of the present invention, the pearlescent effect pigment KC9805D of Fujian Kuncai Technology Co., Ltd. is selected, and the particle size is 10-60nm.

[0064] The curing agent is a water-based isocyanate, aziridine or carbodiimide curing agent. In the specific embodiment of the present invention, Wanhua's 270 is selected, which has an appearance of a colorless to light yellow liquid and an NCO content of 20-22%.

[0065] The test method involved in the present invention is as follows:

[0066] The wear resistance test of the multi-layer 3D effect coated fabric of the present invention is carried out according to the dry and wet rubbing resistance methods of GB / T3903.16-2008 "Test method for wear resistance of uppers, linings and insoles of footwear".

[0067] The tensile performance test of the multi-layer 3D effect coated fabric of the present invention is performed with reference to the tensile test method for fabric adhesive coatings in ASTM D751-2006 "Standard Test Methods for Coated Fabrics".

[0068] The bending resistance test equipment of the present invention is carried out on the GT-7071-B instrument of High Speed ​​Rail Testing Instrument (Dongguan) Co., Ltd. The sample cutting size is 3.7 cm×6.7 cm in A direction and 3.7 cm×6.7 cm in B direction, at least one piece each. After the sample is installed on the clamp, the test is carried out.

[0069] The high rheological slurry with special effects provided by the present invention is prepared by the following preparation method, and the specific steps are as follows:

[0070] Add water-based PU or water-based modified PU resin, pH adjuster, dispersant, fumed silica, and cellulose ether into the container according to the mass percentage of the materials listed in Table 1, and stir at a high speed of 1200-1500 r / min in a high-speed disperser. After stirring evenly, reduce the speed to 800-1000 r / min, and continue to add special effect pigments, water-based thickeners, and curing agents to disperse evenly;

[0071] In the above steps, the amount of aqueous thickener is controlled to adjust the viscosity to 180000-200000cps (adjust the rotation speed to 7.5rpm), 25700-36400cps (adjust the rotation speed to 75rpm), and the thixotropy of the high rheological slurry with special effects is controlled to 5.5-7.0;

[0072] According to different actual needs, the above-mentioned preparation of high rheological slurry with special effects can be repeated to prepare a variety of high rheological pigments with special effects, such as a first special effect high rheological slurry, a second special effect high rheological slurry, a third special effect high rheological slurry, and a fourth special effect high rheological slurry.

[0073] The specific steps of the manufacturing process of the multi-layer 3D effect coated fabric provided by the present invention are as follows:

[0074] 1) Pre-shrink the base fabric at 155-160°C, and after cooling, lay it flat on the surface of the base;

[0075] 2) First, the first special effect high rheological slurry is printed on the base fabric using a first stencil plate with a hollowed-out thickness of Amm, and then dried at a temperature of 30-35° C. for 4-6 minutes to obtain a first coating;

[0076] The drying temperature should be controlled at 30 - 35°C. Because when the temperature is lower than 30°C, the surface drying of the slurry is too slow, which is not conducive to the next construction process. When the temperature is higher than 35°C, the surface of the slurry dries too fast, and the probability of coating shrinkage increases, affecting the effect of the next construction process. The drying time is 4 - 6 minutes. Because when the drying time is less than 4 minutes, the slurry cannot dry on the surface and the next construction process cannot be carried out. When the drying time is more than 6 minutes, the drying time is too long, and the edges of the coating will shrink, which is not conducive to the next construction process.

[0077] 3) After the first coating obtained by die stamping in step 2) is surface dry, use a second die stamping plate with a thickness of B mm to print a second special effect high - rheology slurry, and then carry out drying. The drying temperature is 30 - 35°C, and the drying time is 4 - 6 minutes to obtain a second coating. Among them, the reasons for the drying temperature and time are the same as in step 2).

[0078] 4) After the second coating is surface dry, use a third die stamping plate with a thickness of C mm to print a third special effect high - rheology slurry, and then carry out drying. The drying temperature is 30 - 35°C, and the drying time is 4 - 6 minutes to obtain a third coating. Among them, the reasons for the drying temperature and time are the same as in step 2).

[0079] 5) After the third coating is surface dry, use a fourth die stamping plate with a thickness of D mm to print a fourth special effect high - rheology slurry, and then carry out drying. The drying temperature is 30 - 35°C, and the drying time is more than 1 hour. Then it can be dried at room temperature (25°C) for 7 days or transferred to an environment of 40 - 70°C to continue curing for 48 - 72 hours to obtain the Figure 4 shown multi - layer 3D effect coating fabric (four - layer).

[0080] Among them, the first die stamping plate to the fourth die stamping plate are four die stamping plates with the same printing pattern but different thicknesses for overprinting, namely the first die stamping plate with a thickness of A mm, the second die stamping plate with a thickness of B mm, the third die stamping plate with a thickness of C mm, and the fourth die stamping plate with a thickness of D mm, where A < B < C < D. According to specific needs, only two, three, or four of them can be used to form a two - layer, three - layer, or four - layer coating fabric with a multi - layer 3D effect coating.

[0081] The drying temperature is 30 - 35°C, and the drying time is more than 1 hour. When the temperature is lower than 30°C, the drying time is too long, affecting the efficiency. When the temperature is higher than 35°C, it will cause the surface to dry too fast, resulting in surface defects such as wrinkles and collapse marks. When the transfer is carried out when the time is less than 1 hour, defects such as orange peel, wavy patterns, and collapse will appear on the surface of the coating.

[0082] Among them, the temperature after transfer is room temperature or 40 - 70°C. Exceeding 70°C will affect the inner structure of the coating,进而影响性能,导致不良率增加.

[0083] When drying at room temperature is less than 7 days, there will be a risk of incomplete drying inside, affecting the pressure resistance, hydrolysis resistance and other properties of the final sample; when drying time is less than 48 hours at a temperature of 40-70°C, there will be incomplete drying, affecting the pressure resistance, hydrolysis resistance and other properties.

[0084] According to the above method, the present invention shows a representative specific implementation mode, and the components and contents of the slurries in Examples 1 to 4 are shown in Table 1. It should be noted that the embodiments given in the present invention are not intended to limit the technical ideas of the present invention. The high rheology slurries obtained by replacing similar components according to the technical ideas provided by the present invention all belong to the scope of the technical solutions to be protected by the present invention.

[0085] Table 1 Components and contents of the slurry in Examples 1 to 4

[0086]

[0087] According to the above method for manufacturing a multi-layer 3D effect coated fabric, the present invention shows a representative specific implementation method. Examples 5 to 8 use the slurry provided in Examples 1 to 4 to prepare the multi-layer 3D effect coated fabric. The thickness, drying process conditions and performance test results of each stencil used in conjunction with the slurry are shown in Table 2. Figure 1-Figure 4 The multi-layer 3D effect coated fabric shown contains 2 to 4 layers.

[0088] Table 2 Screen thickness, drying time and performance test results of Examples 5 to 8

[0089]

[0090] It can be seen from the test results in Table 2 that the coating sandpaper friction test of the multi-layer 3D effect coated fabric obtained in the specific embodiments of the present invention is greater than 35 times, the fabric dry rubbing test is greater than 25,000 times, and the fabric wet rubbing is greater than 12,000 times, which meets the wear resistance requirements of the upper, lining and inner pad of GB / T3903.16-2008 "Test method for wear resistance of footwear uppers, linings and inner pads", the bending resistance test reaches 100,000 times, and the tensile test (adhesion) is greater than 2.5 kg / cm.

[0091] The multi-layer 3D effect coated fabric provided by the present invention is applied to clothing, shoes and bags, sofas, car interiors, furniture and soft furnishings and other fields, which can greatly enrich the fabric selection in the above fields.

[0092] It should be noted that, although the above embodiments have been described in this article, the patent protection scope of the present invention is not limited thereby. Therefore, based on the innovative concept of the present invention, changes and modifications made to the embodiments described herein, or equivalent structures or equivalent process changes made using the contents of the present invention specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields, are all included in the patent protection scope of the present invention.

Claims

1. A manufacturing process for a multi-layer 3D effect coated fabric, characterized in that: The following steps are involved: S1. Prepare a substrate, a base fabric, a stencil with a hollow portion, a scraper and a coating; S2, placing the base fabric on the substrate; S3, placing the stencil plate on the base fabric; S4, filling the coating into the hollow part of the stencil; S5, scraping off the excess paint that has not entered the hollowed-out portion of the stencil plate with the scraper; S6, curing shrinkage; S7, repeating steps S3 to S6 one to four times, except for the last repetition of steps S3 to S6, in step S6, the curing shrinkage temperature is 30-35°C, the curing shrinkage time is 4-6min, and when steps S3 to S6 are repeated for the last time, in step S6, the curing shrinkage temperature is 25-70°C, and the curing shrinkage time is 48-168h, to obtain the multi-layer 3D effect coated fabric, wherein the hollow thickness of the hollow part of the stencil is 0.5-5.0mm, wherein the hollow thickness of the stencil selected in the latter operation step S3 is greater than the hollow thickness of the stencil selected in the previous operation step S3, but has the same shape of the hollow part of the stencil; The coating comprises: Water-based PU or water-based PU modified resin 76-91%; pH adjuster 0.1-0.2%; Defoaming agent 0.2-0.5%; Dispersant 0.5-2%; Fumed silica 1-3%; Cellulose ether 0.5-1.0%; Water-based thickener 0.6-2%; Curing agent 3-5%; The water-based PU or water-based PU modified resin is an aliphatic polyester polyurethane water-based dispersion, the pH regulator is an organic amine, the defoamer is a mixture of foam-breaking polysiloxane and hydrophobic particles in polyethylene glycol, the dispersant is a polyacrylate copolymer, the cellulose ether is hydroxypropyl or hydroxyethyl cellulose ether, the water-based thickener is a hydrophobically modified water-based polyurethane or an acrylate thickener, and the curing agent is a water-based isocyanate, aziridine or carbodiimide curing agent.

2. The manufacturing process according to claim 1, characterized in that: The particle size of the fumed silica is 0.002-0.1 μm.

3. The manufacturing process according to claim 1, characterized in that: The coating also includes 3-10% pigment.

4. A multi-layer 3D effect coated fabric, characterized in that: The multi-layer 3D effect coated fabric is prepared by the manufacturing process described in any one of claims 1-3, the cross-section of the multi-layer on the multi-layer 3D effect coated fabric is arched, rectangular and / or trapezoidal, and the thickness of the multi-layer on the multi-layer 3D effect coated fabric is 0.5-5mm.

5. An application of a multi-layer 3D effect coated fabric prepared by the manufacturing process described in any one of claims 1 to 3.

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