CN114164681B - Coating with 3D relief effect, application and fabric thereof - Google Patents
Coating with 3D relief effect, application and fabric thereof Download PDFInfo
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- CN114164681B CN114164681B CN202111508243.2A CN202111508243A CN114164681B CN 114164681 B CN114164681 B CN 114164681B CN 202111508243 A CN202111508243 A CN 202111508243A CN 114164681 B CN114164681 B CN 114164681B
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
- D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0043—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by their foraminous structure; Characteristics of the foamed layer or of cellular layers
- D06N3/0047—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by their foraminous structure; Characteristics of the foamed layer or of cellular layers obtained by incorporating air, i.e. froth
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
- D06N3/0059—Organic ingredients with special effects, e.g. oil- or water-repellent, antimicrobial, flame-resistant, magnetic, bactericidal, odour-influencing agents; perfumes
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0086—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique
- D06N3/0088—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique by directly applying the resin
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N7/00—Flexible sheet materials not otherwise provided for, e.g. textile threads, filaments, yarns or tow, glued on macromolecular material
- D06N7/0092—Non-continuous polymer coating on the fibrous substrate, e.g. plastic dots on fabrics
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
The invention belongs to the technical field of textile coatings, and particularly relates to a coating with a 3D relief effect, and a preparation process and application thereof. The coating which can be foamed and contains functional fibers and has the 3D relief effect is obtained by mixing water-based PU or PU modified resin and the functional fibers in proportion. The coating with the 3D relief effect is a three-dimensional framework formed by co-constructing flexible resin, flexible filler and foaming spheres, and the support coating forms a 3D relief model on cloth meshes, so that the coating has good pressure bearing and pressure resilience characteristics. Due to the surface characteristics of the functional fibers, bubbles and foaming particles in the slurry are attached to the functional fibers, and the functional fibers play a role in harmonizing, so that the bubbles and the foaming microsphere particles are kept in a uniform and stable state, and the uniformity of the coating is kept. Compared with the cloth with 3D effect in the prior art, the coating has better 3D visual effect and compression rebound resilience, and has better visibility, adhesive force, wear resistance and non-cracking characteristics.
Description
Technical Field
The invention belongs to the technical field of textile coatings, and particularly relates to a coating with a 3D relief effect, application and a fabric thereof.
Background
Screen printing is to stretch silk fabric, synthetic fiber fabric or metal wire net onto the screen frame and to make screen printing plate by hand painting film or photochemical plate making. The modern screen printing technology is to make screen printing plate (the silk screen holes of the picture and text part on the screen printing plate are through holes, but the silk screen holes of the non-picture and text part are blocked) oil painting, plate painting, poster, name card, frame cover, commodity package, commodity label, printing and dyeing textile, glass, metal and other plane carriers by using photosensitive materials through a photoengraving method. The common screen printing process flow is as follows: stretched net, degreasing, drying, stripping the film base, exposing, developing, drying, repairing and sealing the net.
More information about the above solutions can also be found in the following documents:
in the Chinese patent application with the patent number of CN105780540A, a textile foaming anti-slip printing and a manufacturing process thereof are disclosed, wherein the textile foaming anti-slip printing comprises a foaming anti-slip layer with uneven surface, the foaming anti-slip layer is formed by covering acrylic resin foaming slurry on the surface of the textile in a printing mode of a 80-135 mesh screen plate and thermally foaming at 120+/-3 ℃. The technology adopts a screen printing-thermal foaming process, the texture effect is derived from the hollowed-out design on the offset plate, the coating is mainly attached to the surface of the textile, the thickness of the foaming coating is not higher than 0.5mm, and the technology has a certain anti-slip effect. However, the coating in the technology has thinner thickness, weak stereoscopic impression, poor applicability to the mesh structure fabric, and the performance of the acrylic resin is difficult to reach the expected performance of the polyurethane printing coating, such as high peel strength, bending resistance and the like.
In the Chinese patent application with the patent number of CN103009841B, a method for manufacturing relief patterns is disclosed, wherein photosensitive glue is not used for sun-curing different screen plates with the mesh of 8T-60T, the thickness of the photosensitive glue is 0.2-1.0mm, microsphere foaming ink is printed on paper through scraper printing, foaming is carried out at 120-160 ℃, multiple screen plates can be arranged for carrying out sand polishing pattern and relief pattern superposition, and finally the foaming thickness of 1-2mm is formed. The printing mode adopted by the technology is also a screen offset printing-thermal foaming technology, the higher foaming thickness is realized through multiple times of printing, the formed coating is deposited on the surface of the paper, the texture effect is derived from the hollowed-out design on the net sheet, and the final finished product is a packaging paper product with cloth grains, so that the effects of reducing the cost and replacing the cloth face are achieved, and the essence of the finished product is obviously different from that of the textile cloth.
In the chinese patent application of patent No. CN100586738, a transfer printing method of a foaming material is disclosed, in which an ink is printed on a non-fully foaming material, and then the color ink and the foaming material are tightly combined by hot pressing, so that the color ink is not easy to fall off. The foaming material used in the patent is EVA, TPE, PU, SBR and the like, and the finished product is a foaming material and a fabric product in the non-woven field.
In the Chinese patent application of patent No. CN202110002783.7, a coating with special light reflecting effect, a concave-convex fabric and a preparation method thereof are disclosed, wherein the coating is water-based polyurethane or acrylic acid coating containing special light reflecting effect pigment, and the preparation method of the fabric is to manually scrape the coating on a single-layer or sandwich mesh fabric, and the natural concave and light reflecting effects of the coating are utilized to form different light reflecting color effects with strong contrast in thick coating and thin coating areas, and simultaneously, the strength, the waterproofness and the wear resistance of the fabric are enhanced. According to the method, the concave-convex effect and the special light reflecting effect are realized through natural concave in the coating curing process, and the convex effect, the flat light effect and the matte effect exceeding the surface of the cloth cannot be realized. In addition, the printing is needed on a smooth and easily stripped table top, the sizing agent is printed from the reverse side of the mesh cloth, the mesh is required to be full-transparent, the type of the mesh cloth is limited, and the sizing agent cannot be applied to common cloth of the type such as cloth with a single-sided mesh structure, attached mesh cloth and the like.
The existing screen printing process has wide application on textile surfaces, but some problems to be solved exist, such as screen printing coating, including thermal foaming coating, all exist on cloth surfaces, and multiple printing is usually required for the fabric (full-transparent mesh, single-sided mesh or double-sided different-pore private mesh) with a mesh structure to enable the sizing agent to cover the mesh to be "bridged", and then superposition effect printing is realized. Especially, for the large-mesh fabric, printing can be performed only in the framework area, the air flow is assisted to avoid the mesh area, the printing process is complicated, the printing efficiency of the finished product is low, and the applicability and the design of the mesh structure fabric are greatly limited. Meanwhile, the existing slurry coating for screen printing is low in foaming thickness, poor in three-dimensional supporting effect and incapable of forming a strong 3D relief effect. In addition, the foaming coating is often loose and porous in structure, and the coating performance is greatly limited in the aspects of hot pressing resistance, bending resistance, wear resistance, high temperature resistance, high humidity resistance and the like, so that certain limitation is formed on the application of the foaming coating in the textile field.
Disclosure of Invention
In view of the above-mentioned technical problems existing in the background art, it is desirable to provide a coating with a 3D relief effect, a preparation process and application thereof, which improve the foaming degree of the coating, and can accurately and rapidly inject the coating into a cloth mesh, form a strong 3D relief effect on the surface of the cloth, and improve the construction efficiency.
To achieve the above object, in a first aspect of the present invention, the present inventors provide a coating material having a 3D relief effect, comprising, in weight percent:
70-80% of water-based PU resin;
0.1-0.3% of pH regulator;
0.5 to 1.5 percent of dispersing agent;
0.5-2.0% of unfoamed particles;
1.0 to 5.0 percent of modified cellulose ether;
1.0 to 5.0 percent of flexible fiber;
0.3-3.0% of a thickening agent, wherein the thickening agent is water-based nonionic hydrophobically modified polyurethane or acrylic ester;
1.0 to 4.0 percent of diluent; the diluent is one or more of propylene glycol, propylene glycol methyl ether or propylene glycol butyl ether;
0.2-2.0% of stabilizer;
1.0 to 3.0 percent of handfeel agent;
3.0 to 5.0 percent of curing agent.
The pH regulator can be organic acid, inorganic acid, alkali, neutralizer, organic amine or buffer, and the pH regulator adopted by the invention is organic amine, has no special smell and high cost performance, and can effectively replace ammonia water and organic alcohol in a water-based paint formula. The dispersing agent adopted by the invention is polyacrylate copolymer, the stabilizer is amine stearate, and the handfeel agent (sometimes also called handfeel improver) is organosilicon modified siloxane. The flexible fiber has excellent surface characteristics, so that bubbles and foaming particles in the coating with the 3D relief effect can be attached to the flexible fiber, and the flexible fiber plays roles of supporting, blending and stabilizing, so that the whole coating system and a coating formed later are kept stable and uniform.
According to a preferred embodiment of the invention, the curing agent is dimer hexamethylene diisocyanate, the 100% modulus of the aqueous PU resin is 2.0-4.0MPa, and the elongation at break is 800% -1500%. The reaction structure of the aqueous PU resin and the dimer hexamethylene diisocyanate curing agent ensures that the foamed coating still has higher flexibility and bearing capacity and stable bending resistance at a high value. If the curing agent is in a trimeric structure or a non-hexamethylene structure, the modulus of the resin is improved, and the rigidity and the pressure bearing capacity of the coating structure are improved, but the flexibility is greatly lost. If the curing agent is an aziridine or carbodiimide structure, the high-temperature and high-humidity resistance of the coating is insufficient; if the elastic modulus of the resin is too low, the coating structure is too soft, the pressure bearing capacity is insufficient, and the three-dimensional supporting effect is also deteriorated.
According to a preferred embodiment of the present invention, the modified cellulose ether is a hydroxyethyl or hydroxypropyl cellulose ether. The length of the modified cellulose ether is 0.5-50 mu m. The viscosity of the 5% aqueous solution of the modified cellulose ether is 100-200 mPa.s at 25 ℃, the thickening capability is not high, but the matching property of the length and the flexible fiber is good, the two components are cooperated with the resin and the curing agent to form a strong supporting effect, the heat-resistant pressure performance and the rebound capability after being pressed of the foaming coating are greatly improved, and the retention rate after being pressed and rebounded under specific conditions can reach 90%. If the length of the cellulose is shortened, the thickening capacity of the cellulose is obviously improved, but the pressure-bearing auxiliary capacity of the cellulose is greatly reduced. Similarly, the elongation at break of the flexible fibers is reduced, the fiber stiffness is enhanced, the bearing capacity is less affected, but the tortuosity resistance of the coating is more impaired.
According to a preferred embodiment of the present invention, the unfoamed particles are spherical acrylic polyester copolymer having a particle diameter of 30 to 60 μm, a heuristic temperature of 130 ℃, a maximum foaming temperature of 150 to 170 ℃ and an expansion ratio of 12 times. The foaming temperature of the foaming particles is high in consistency with the common heat treatment temperature of the textile fabric, and the performance of the fabric is not easily damaged. Meanwhile, the high foaming temperature and expansion ratio not only enable the coating to have high foaming height, but also have comprehensive physical properties, in particular good hot-pressing resistance and solvent resistance (ethanol, butanone, cyclohexanone and the like). If the foaming temperature is higher, the performance of the foaming coating is better, but the performance of the fabric (especially materials containing terylene, chinlon and the like) is damaged in secondary shrinkage, partial melting and the like.
According to a preferred embodiment of the invention, the flexible fiber is a cotton fiber, a polyester fiber or a blend fabric fiber, the length of the flexible fiber is 0.5-200 mu m, the diameter is 17-23 mu m, the breaking elongation is more than or equal to 30%, the softening point is more than or equal to 180 ℃, and the melting point is more than or equal to 200 ℃.
Compared with the prior art, the technical scheme at least has the following beneficial effects:
the coating with the 3D relief effect provided by the invention has the advantages of high rising thickness, strong 3D relief effect, good supporting performance and the like, and has no pungent smell.
In a second aspect of the present invention, the present inventors provide a process for preparing a coating material having a 3D relief effect according to the first aspect of the present invention, specifically comprising the steps of:
s1, preparing slurry: the water-based PU resin, the pH regulator, the dispersing agent, the unfoamed particles, the flexible fibers, the diluent, the stabilizer, the thickener, the handfeel agent, the curing agent and the like are mixed according to the weight percentage, so as to obtain the coating with the 3D relief effect;
s2, material preparation: preshrinking the mesh fabric base cloth at 155-160 ℃, and connecting the front surface of the mesh fabric base cloth with the guide cloth upwards after preshrinking and cooling;
s3, setting device parameters: setting the height of a scraper of a doctor-blade printing machine, enabling the scraper to be attached to the guide cloth, enabling the horizontal distance between the scraper and the oven to be 3 meters, setting the temperature of a first section of the first oven to be 100-110 ℃, the temperature of a second section to be 140-150 ℃, the temperature of a third section and the temperature of a fourth section to be 160-170 ℃, setting the temperature of a second cold air box to be 3-5 ℃, enabling the air flow to be 3-6 atm, and enabling the conveying speed to be 15-25 meters/min;
s4, sizing and foaming: adhering a scraper of a doctor-blading printer to the cloth guide, starting an oven and a cold air box, starting transmission, preheating, and doctor-blading the coating with the 3D relief effect on the front surface of the mesh fabric base cloth, so that the coating with the 3D relief effect fills the meshes of the base cloth, and then, putting the base cloth into the oven for foaming and shaping, wherein the sizing flow of the coating is 20-30L/min;
s5, cooling and molding: the drying temperature is 25-40 ℃, the drying time is 24-48 h, and the product is cut for standby according to the required design size after drying.
According to the preferred embodiment of the invention, the guide cloth is a single-layer or multi-layer fabric with a mesh structure, the length of the guide cloth is 3-5 meters, and the guide cloth mainly plays a role in guiding and debugging.
According to the preferred embodiment of the invention, the length of the first oven used in the step S3 is 3-5 m, the length of the second oven is 15-20 m, the length of the cold air box is 2-3 m, and the arrangement of the temperature gradient, the gas flow and the conveying speed of the first oven, the second oven and the cold air box is favorable for orderly heating and coating foaming shaping of the fabric, so that defects such as thermal shock deformation and uneven foaming of the fabric are reduced.
According to a preferred embodiment of the present invention, the thickener is used in step S1 to adjust the viscosity of the coating material having 3D relief effect to 80000-100000cps. The viscosity is too low to permeate the cloth to flow, so that printing defects and foaming thickness are not obvious, but the viscosity value is too high, so that the coating is difficult to foam, residual bubbles form obvious coating structure defects in the subsequent foaming process, and the physical properties of the coating are reduced.
According to the preferred embodiment of the invention, the relief effect is a 3D relief effect formed by combining a raised structure formed in a mesh area after foaming and a fabric, wherein the coating is precisely printed at the mesh of the mesh fabric.
According to the preferred embodiment of the invention, the mesh structure of the mesh fabric base cloth is full-transparent meshes, double-sided meshes with different apertures or single-sided meshes, the aperture size is 1-10mm, the thickness is 0.3-3.0mm, the type of the mesh fabric is single-layer, lamination, single-sided lamination, sandwich and/or multi-layer, and the front side of the mesh fabric is one side with a large mesh structure.
Compared with the prior art, the technical scheme at least has the following beneficial effects:
the coating prepared by the technical scheme of the invention has excellent performances in the aspects of hot pressing resistance, bending resistance, wear resistance, high temperature resistance, high humidity resistance and the like, has simple and quick operation procedures, high production efficiency and convenient application, and can be widely applied to textiles in the aspects of clothing, shoe materials or personalized decorations and the like.
In a third aspect of the present invention, the present inventors provide a fabric having a 3D embossing effect coating prepared according to the second aspect of the present invention, the embossing effect coating being in a shape precisely disposed at the mesh of the mesh fabric to form a convex structure, and forming a 3D embossing effect in combination with the mesh fabric.
Compared with the prior art, the technical scheme at least has the following beneficial effects:
the technical scheme of the invention can be combined with a mesh cloth structure, so that a strong 3D relief effect with accurate positions is displayed at the mesh, and the strength of the fabric is effectively enhanced. Meanwhile, the fabric can be applied to textiles in the aspects of clothing, shoe materials or personalized decorations and the like, and the variety of the fabric is greatly increased.
Drawings
FIG. 1 is a schematic illustration of a cloth with 3D relief effect according to an embodiment;
FIG. 2 is another cloth with 3D relief effect according to an embodiment;
FIG. 3 is another cloth with 3D relief effect according to an embodiment;
Detailed Description
In order to describe the technical content, constructional features, achieved objects and effects of the technical solution in detail, the following description is made in connection with the specific embodiments in conjunction with the accompanying drawings. It should be understood that these examples are illustrative only of the present application and are not intended to limit the scope of the present application.
Example 1
Referring to fig. 1, the present embodiment provides a coating with 3D relief effect, and preparation and application thereof. The coating with the 3D relief effect provided by the embodiment contains 70.0% of water-based PU resin (Covestro Impranil1068, 100% modulus 2.0MPa, tensile rate 1500%); 0.2% of organic amine pH regulator (Nanjing Gu Tian AMP-95) and 1.5% of polyacrylate copolymer dispersant (BYK 192); spherical acrylic polyester copolymer expanded beads (Front 900 sd) 2.0%; hydroxyethyl cellulose ether (ashland water_p 1425) 5.0%; 10.0% of flexible fibers (Fujian Ralson cotton F50); 2.9% of nonionic hydrophobically modified polyurethane thickener (DOW RM 8W); 0.1% of water-based nonionic hydrophobically modified acrylate thickener (sea-wetting PTF); propylene glycol monobutyl ether diluent (chemical purity in the chemical engineering of the ridge) 4.0%; 2.0% of an amine stearate stabilizer (Bozzetto STOKAL_SR); 2.3% of a silicone modified silicone feel agent (Silok 3300); 3.0% of dimeric hexamethylene diisocyanate curing agent (Covestro DesmodurN 3900).
The preparation and application process of the coating with the 3D relief effect comprises the following steps:
s1, preparing slurry: adding water-based PU resin into a container according to the weight percentage, and sequentially adding a pH regulator, a dispersing agent, foaming particles, flexible fibers and a thickening agent at the dispersion speed of 800 r/min; dispersing for 20min at a speed of 1500r/min, reducing the dispersing speed to 800r/min, and sequentially and slowly adding a diluent, a stabilizer, a handfeel agent, a thickening agent and a curing agent to obtain a uniform coating with a viscosity of 80000cps and a 3D relief effect;
s2, material preparation: preshrinking the full-permeable mesh single-layer fabric base cloth (aperture is 1mm and thickness is 0.3 mm) at 155-160 ℃, and connecting the front surface of the mesh fabric base cloth with the full-permeable mesh single-layer guide cloth upwards after preshrinking and cooling;
s3, setting device parameters: setting the height of a scraper of a doctor-blade printing machine, enabling the scraper to be attached to the guide cloth, enabling the horizontal distance between the scraper and the oven to be 3 meters, setting the temperature of a first section of the first oven to be 100-110 ℃, the temperature of a second section to be 140-150 ℃, the temperature of a third section and the temperature of a fourth section to be 160-170 ℃, setting the temperature of a second cold air box to be 3-5 ℃, enabling the air flow to be 3 atmospheres, and enabling the conveying speed to be 15 meters/minute;
s4, sizing and foaming: enabling a scraper of a doctor-bar printing machine to be attached to the cloth guide, starting an oven and a cold air box, starting transmission, preheating, and doctor-bar coating the coating with the 3D relief effect on the front surface of the mesh fabric base cloth, so that the coating with the 3D relief effect fills the meshes of the base cloth, and entering the oven for foaming and shaping, wherein the sizing flow of the coating is 20L/min;
s5, cooling and molding: the drying temperature is 40 ℃, the drying time is 24 hours, and the fabric with the 3D embossment effect coating is obtained by cutting according to the required design size after drying, wherein the embossment height is 1mm.
Example 2
Referring to fig. 2, the present embodiment provides a coating with 3D relief effect, and preparation and application thereof. The coating with 3D relief effect provided in this example contains 80.8% of aqueous PU resin (Wanhua Tekspro7230,100% modulus 3.2Pa, elongation 1200%); organic amine pH regulator (Nanjing Gu Tian AMP-95) 0.1%, polyacrylate copolymer dispersant (BYK 192) 1.2%; spherical acrylic polyester copolymer expanded beads (Front 900 sd) 1.5%; hydroxyethyl cellulose ether (ashland water_p 1425) 4.0%; 4.0% of flexible fibers (Fujian Ruisen polyester fibers F100); 2.1% of nonionic hydrophobically modified polyurethane thickener (DOW RM 8W); 0.1% of water-based nonionic hydrophobically modified acrylate thickener (sea-wetting PTF); propylene glycol monomethyl ether diluent (chemical grade, chemical purity) 3.0%; amine stearate stabilizer (Bozzetto stop_sr) 0.2%; 3.0% of an organosilicon modified siloxane handfeel agent (BYK 23142); 4.0% of dimeric hexamethylene diisocyanate curing agent (Covestro Bayhydur _XP_2655).
The preparation and application process of the coating with the 3D relief effect comprises the following steps:
s1, preparing slurry: adding water-based PU resin into a container according to the weight percentage, and sequentially adding a pH regulator, a dispersing agent, foaming particles, flexible fibers and a thickening agent at the dispersion speed of 800 r/min; s2: dispersing for 20min at a speed of 1500r/min, reducing the dispersing speed to 800r/min, and sequentially and slowly adding a diluent, a stabilizer, a handfeel agent, a thickening agent and a curing agent to obtain a uniform coating with a viscosity of 950000cps and a 3D relief effect;
s2, material preparation: preshrinking composite mesh fabric base cloth (with the aperture of 5mm and the thickness of 1.5 mm) with different apertures at 155-160 ℃, and connecting the large aperture side of the mesh fabric with the composite mesh fabric with different apertures on the two sides upwards after preshrinking and cooling, wherein the fabric is a single-layer or multi-layer fabric similar to the structure of the used mesh fabric, and mainly plays a role in guiding and debugging;
s3, setting device parameters: setting the height of a scraper of a doctor-blade printing machine, enabling the scraper to be attached to the guide cloth, enabling the horizontal distance between the scraper and the oven to be 3 meters, setting the temperature of a first section of the first oven to be 100-110 ℃, the temperature of a second section to be 140-150 ℃, the temperature of a third section and the temperature of a fourth section to be 160-170 ℃, setting the temperature of a second cold air box to be 3-5 ℃, enabling the air flow to be 6 atmospheres, and enabling the conveying speed to be 25 meters/minute;
s4, sizing and foaming: enabling a scraper of a doctor-bar printing machine to be attached to the cloth guide, starting an oven and a cold air box, starting transmission, preheating, and doctor-bar coating the coating with the 3D relief effect on the front surface of the mesh fabric base cloth, so that the coating with the 3D relief effect fills the meshes of the base cloth, and entering the oven for foaming and shaping, wherein the sizing flow of the coating is 30L/min;
s5, cooling and molding: the drying temperature is 25 ℃, the drying time is 48 hours, and the fabric with the 3D embossment effect coating is obtained by cutting according to the required design size after drying, wherein the embossment height is 0.8mm.
Example 3
Referring to fig. 3, the present embodiment provides a coating with 3D relief effect, and preparation and application thereof. The coating with the 3D relief effect provided by the embodiment contains 85.0% of water-based PU resin (Covestro Impranil DLH,100% modulus 4.0MPa, stretching rate 900%); 0.3% of organic amine pH regulator (Nanjing Gu Tian AMP-95) and 0.5% of polyacrylate copolymer dispersant (BYK 192); spherical acrylic polyester copolymer expanded beads (Front 900 sd) 0.5%; hydroxyethyl cellulose ether (Ashland natrosol_p1425) 1.5%; 8.0% of flexible fibers (Fujian Ruisenthalpic fibers F200); 0.5% of nonionic hydrophobically modified polyurethane thickener (DOW RM 8W); 0.1% of water-based nonionic hydrophobically modified acrylate thickener (sea-wetting PTF); propylene glycol diluent (chemical purity of chemical engineering, ridge); 1.6% of an amine stearate stabilizer (Bozzetto STOKAL_SR); 1.0% of organosilicon modified siloxane handfeel agent (Silok 1073R); 5.0% of dimeric hexamethylene diisocyanate curing agent (Covestro Bayhydur _XP_2655).
The preparation and application process of the coating with the 3D relief effect comprises the following steps:
s1, preparing slurry: adding water-based PU resin into a container according to the weight percentage, and sequentially adding a pH regulator, a dispersing agent, foaming particles, flexible fibers and a thickening agent at the dispersion speed of 800 r/min; s2: dispersing for 20min at a speed of 1500r/min, reducing the dispersing speed to 800r/min, and sequentially and slowly adding a diluent, a stabilizer, a handfeel agent, a thickening agent and a curing agent to obtain a uniform coating with a viscosity of 100000cps and a 3D relief effect;
s2, material preparation: preshrinking a sandwich mesh fabric (with the aperture of 10mm and the thickness of 3 mm) with single-sided meshes at 155-160 ℃, and connecting the large-aperture side of the mesh fabric with the sandwich guide cloth with the single-sided meshes with a mesh structure after preshrinking and cooling;
s3, setting device parameters: setting the height of a scraper of a doctor-blade printing machine, enabling the scraper to be attached to the guide cloth, enabling the horizontal distance between the scraper and the oven to be 3 meters, setting the temperature of a first section of the first oven to be 100-110 ℃, the temperature of a second section to be 140-150 ℃, the temperature of a third section and the temperature of a fourth section to be 160-170 ℃, setting the temperature of a second cold air box to be 3-5 ℃, enabling the air flow to be 6 atmospheres, and enabling the conveying speed to be 20 meters/minute;
s4, sizing and foaming: enabling a scraper of a doctor-bar printing machine to be attached to the cloth guide, starting an oven and a cold air box, starting transmission, preheating, and doctor-bar coating the coating with the 3D relief effect on the front surface of the mesh fabric base cloth, so that the coating with the 3D relief effect fills the meshes of the base cloth, and entering the oven for foaming and shaping, wherein the sizing flow of the coating is 30L/min;
s5, cooling and molding: the drying temperature is 40 ℃, the drying time is 48 hours, and the fabric with the 3D embossment effect coating is obtained by cutting according to the required design size after drying, wherein the embossment height is 2mm.
The cloth with the 3D embossment effect coating obtained in the above examples 1-3 is subjected to hot pressing resistance, abrasion resistance, bending resistance, high temperature and high humidity resistance, alkali resistance, aging resistance, hardness and other tests, and the test methods are respectively as follows:
the heat-resistant pressure test equipment is LY-996B double-station sliding table cold-hot pressing machine of Fujian blue hawk mechanical limited company, and the test conditions are 10kg,150 ℃ (actual temperature 135-140 ℃) and 40s;
the abrasion resistance test is carried out based on the method D3886 of ASTM standard, the test equipment is Atlas general abrasion tester (UWT), the sample cut-parts are discs with the diameter of 112mm, the expansion pressure is 5.5-6.5 pounds per square inch, and the grinding head weight is 454g;
the bending resistance test equipment is performed on a high-speed rail detection instrument (Dongguan) GT-7071-B instrument, the sample cutting size is that A is 3.7cm multiplied by 6.7cm, B is that at least 1 piece of sample is 3.7cm multiplied by 6.7cm, and 100000 times of test is performed after the sample is mounted on a clamp;
the high-temperature and high-humidity resistance test is carried out on a high-speed rail detection instrument (Dongguan) limited company GT-7005-R instrument, and the test conditions are 80+/-2 ℃, 95+/-2% and 168 hours;
the alkali resistance test method comprises the steps of cutting a sample with the size of 2 inches by 2 inches, soaking the sample in 900mL of newly prepared 10% NaOH solution for 24 hours, washing the sample for 1min by using clear water, absorbing the surface moisture by using absorbent paper, comparing the sample with a standard sample, and evaluating the surface change condition;
the aging resistance test is carried out by using a QUV/Q xenon lamp aging test box (lamp source UVA-340) of Q-lab company, wherein the size of a cut piece is 12cm multiplied by 7.5cm, 4 pieces are subjected to exposure time at a time is 48 hours;
hardness test equipment model was three amounts in japan, shore durometer LAC-J/C type the fabrics with 3D relief effect coatings obtained in examples 1-3 of the present invention were obtained according to the above test, and the results obtained according to the above test are shown in table 1.
Table 1 examples 1-3 provide test results for coated fabrics with 3D relief effect
| Project | Example 1 | Example 2 | Example 3 |
| Heat and pressure resistant | High retention rate of > 90% | High retention rate of more than 88 percent | High retention rate of more than 92 percent |
| Wear-resistant | 3600 ring | 3500 turns | 3500 turns |
| Bending resistance | 100000 times | 100000 times | 100000 times |
| High temperature and high humidity resistance | Qualified product | Qualified product | Qualified product |
| Alkali resistance | Qualified product | Qualified product | Qualified product |
| Aging resistance | Qualified product | Qualified product | Qualified product |
| hardness/HC | 30 | 40 | 60 |
As shown in the test results of Table 1, the height (thickness) retention rate of the fabric with the 3D relief effect coating provided by the technical scheme of the invention under the heat-resistant pressure test condition can be maintained to be more than 88%, the number of abrasion-resistant turns under the abrasion-resistant test condition can be more than 3500 turns, the bending-resistant times under the bending-resistant test condition can be 100000 times, the high-temperature and high-humidity resistance can pass the 168h test, the alkali resistance can pass the 24h test of 10% NaOH, the aging resistance can reach the 48h test, and the hardness index is 30-60HC.
The fabric with the 3D relief effect coating can be widely applied to textiles in the fields of home, business and the like, such as bags, footwear, sofas, automobile interiors and the like.
It should be noted that, although the foregoing embodiments have been described herein, the scope of the present invention is not limited thereby. Therefore, based on the innovative concepts of the present invention, alterations and modifications to the embodiments described herein, or equivalent structures or equivalent flow transformations made by the present description and drawings, apply the above technical solution, directly or indirectly, to other relevant technical fields, all of which are included in the scope of the invention.
Claims (6)
1. The coating with the 3D relief effect is characterized by comprising the following components in percentage by weight:
70-85% of water-based PU resin;
0.1-0.3% of pH regulator;
0.5 to 1.5 percent of dispersing agent;
0.5-2.0% of unfoamed particles, wherein the unfoamed particles are spherical acrylic polyester copolymer and have the particle size of 30-60 mu m;
1.0-5.0% of modified cellulose ether, wherein the modified cellulose ether is hydroxyethyl cellulose ether or hydroxypropyl cellulose ether, and the length of the modified cellulose ether is 0.5-50 mu m;
1.0-5.0% of flexible fiber, wherein the flexible fiber is cotton fiber, polyester fiber or blended fabric fiber, the length of the flexible fiber is 0.5-200 mu m, and the diameter is 17-23 mu m;
0.3-3.0% of a thickening agent, wherein the thickening agent is water-based nonionic hydrophobically modified polyurethane or acrylic ester;
1.0-4.0% of a diluent, wherein the diluent is one or more of propylene glycol, propylene glycol methyl ether or propylene glycol butyl ether;
0.2-2.0% of stabilizer;
1.0 to 3.0 percent of handfeel agent;
3.0-5.0% of curing agent, wherein the curing agent is dimer hexamethylene diisocyanate.
2. The use of a coating with a 3D relief effect according to claim 1, comprising the steps of:
s1, preparing slurry: the water-based PU resin, the pH regulator, the dispersing agent, the unfoamed particles, the flexible fibers, the diluent, the stabilizer, the thickener, the handfeel agent and the curing agent are mixed according to the weight percentage to obtain the coating with the 3D relief effect;
s2, material preparation: preshrinking the mesh fabric base cloth at 155-160 ℃, and connecting the front surface of the mesh fabric base cloth with the guide cloth upwards after preshrinking and cooling;
s3, setting device parameters: setting the height of a scraper of a doctor-blade printing machine, enabling the scraper to be attached to the guide cloth, enabling the horizontal distance between the scraper and the oven to be 3 meters, setting the temperature of a first section of the first oven to be 100-110 ℃, the temperature of a second section to be 140-150 ℃, the temperature of a third section and the temperature of a fourth section to be 160-170 ℃, setting the temperature of a second cold air box to be 3-5 ℃, enabling the air flow to be 3-6 atm, and enabling the conveying speed to be 15-25 meters/min;
s4, sizing and foaming: adhering a scraper of a doctor-blading printer to the cloth guide, starting an oven and a cold air box, starting transmission, preheating, and doctor-blading the coating with the 3D relief effect on the front surface of the mesh fabric base cloth, so that the coating with the 3D relief effect fills the meshes of the base cloth, and then, putting the base cloth into the oven for foaming and shaping, wherein the sizing flow of the coating is 20-30L/min;
s5, cooling and molding: the drying temperature is 25-40 ℃, the drying time is 24h-48h, and the product is cut for standby according to the required design size after drying.
3. The use according to claim 2, wherein the thickener is used in step S1 to adjust the viscosity of the coating with 3D relief effect to 80000-100000cps.
4. The use according to claim 2, wherein the relief effect is a 3D relief effect formed by combining a raised structure formed in a mesh area after foaming with a fabric, wherein the coating is precisely printed on the meshes of the mesh fabric.
5. The use according to claim 2, wherein the mesh structure of the mesh fabric base fabric is full-permeable mesh, double-sided mesh with different apertures or single-sided mesh, the aperture size is 1-10mm, the thickness is 0.3-3.0mm, and the mesh fabric type is single-layer or multi-layer.
6. A fabric with a 3D relief effect coating, characterized in that the fabric is prepared by the application of any one of claims 2-5, and the relief effect coating is in a shape which is precisely arranged at the mesh of the mesh fabric to form a convex structure and is combined with the mesh fabric to form a 3D relief effect.
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| CN103709845A (en) * | 2013-12-06 | 2014-04-09 | 青岛益群漆业集团有限公司 | Relief paint |
| CN103709873B (en) * | 2014-01-10 | 2016-04-20 | 高峰 | Leather coating composition and preparation method thereof |
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| WO2022036496A1 (en) * | 2020-08-17 | 2022-02-24 | 福建华峰运动用品科技有限公司 | Waste-cloth-containing recycled fiber coating slurry, coating and preparation method therefor |
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