CN113665183A - Color sand decorative plate and preparation method and application thereof - Google Patents
Color sand decorative plate and preparation method and application thereof Download PDFInfo
- Publication number
- CN113665183A CN113665183A CN202110974768.9A CN202110974768A CN113665183A CN 113665183 A CN113665183 A CN 113665183A CN 202110974768 A CN202110974768 A CN 202110974768A CN 113665183 A CN113665183 A CN 113665183A
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- layer
- sand
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- color sand
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- Dispersion Chemistry (AREA)
- Ceramic Engineering (AREA)
- Laminated Bodies (AREA)
Abstract
The invention provides a colored sand decorative plate and a preparation method and application thereof, wherein the colored sand decorative plate comprises a base layer, a hot-melt coating, a colored sand layer and a finish paint layer which are sequentially arranged; the color sand of the color sand layer is embedded into the hot-melt resin layer; the color sand decorative plate is characterized in that the hot-melting coating is selected to match the color sand layer, and the color sand in the color sand layer is embedded into the hot-melting resin layer, the hot-melting coating has the characteristics of no solvent, high bonding strength, good low-temperature flexibility and certain bonding force without baking, the color sand layer can be directly laid after the hot-melting coating is coated, the working time is saved, a large number of air holes cannot be generated due to baking, the color sand decorative plate without the air holes is finally obtained, the color of the color sand can be fully displayed, the decorativeness is greatly improved, and the color sand decorative plate further has the advantages of high flexibility, excellent stain resistance and longer service life.
Description
Technical Field
The invention belongs to the technical field of decorative plates, and particularly relates to a colored sand decorative plate and a preparation method and application thereof.
Background
The plate is a flat rectangular building material plate made into standard size, is applied to the building industry, is used as a component of a wall, a ceiling or a floor, and is also a metal plate formed by forging, rolling or casting. At present, when marble decoration is carried out on a building wall surface, natural marble stones are directly adhered to the surface of the building wall, or colorful paint is sprayed on a composite coiled material, and then the composite coiled material is adhered to the surface of the building wall.
CN205875586U discloses a natural marble stone for decoration, which comprises a stone body, wherein the upper surface of the stone body is coated with a fluorescent layer; the bottom surface of the stone body is provided with a reinforced net layer, the reinforced net layer is arranged in a concrete layer, and at least four sides of the reinforced net layer are fixed on the stone body through fixing buckles; the marble stone has the advantages that: the installation structure has the advantages of no damage to the ultrathin marble stones, good installation effect, simple structure and convenient use, improves the working efficiency and reduces the labor intensity. However, natural stone is adopted for decoration, and because natural stone is heavy, transportation and construction are very difficult, and when the natural stone is applied to a wall, the natural stone is not renewable and has high cost because the natural stone is not firmly stuck, falls off and causes public hazards and damages human events due to radioactive pollution.
CN111747692A discloses a imitative stone material decorative board and preparation technology, contains substrate layer, elastic coating and paint film coating layer, and the top of substrate layer is provided with elastic coating, and the top of elastic coating is paint film coating layer. The base material layer comprises the following raw materials in parts by weight: 5-8 parts of silica sol, 10-18 parts of acrylic acid glue, 20-30 parts of natural colored sand, 8-10 parts of glass fiber, 8-10 parts of shale ceramsite fiber, 3-5 parts of coal gangue fiber, 10-15 parts of polyester fiber, 1-2 parts of stearic acid and 10-15 parts of water. The stone-like decorative board has the advantages of simple preparation process, light weight, weather resistance, flame retardance, corrosion resistance, sound insulation, environmental protection and heat insulation of the base material, higher stone simulation degree after being coated with the stone-like paint and vivid appearance. And the stone-like paint of the stone-like decorative plate is added with the nano photocatalyst and has a self-cleaning function. However, when the coating is sprayed on the composite coiled material, the pattern of the faced stone is unstable, the hand feeling is poor, and the coating is exposed in the external environment and is easily faded by rain and sunshine, so that the color duration is too short.
CN102383561A discloses a flexible composite decorative material and its production process, which comprises: flexible basic unit, flexible sand wall form dope layer, anti-soil protection finish paint layer, be equipped with flexible sand wall form dope layer, anti-soil protection finish paint layer in proper order on the flexible basic unit, flexible sand wall form dope layer includes water, cellulose ether, film forming auxiliary agent, antifreeze, elasticity emulsion, natural colored sand, compound rock slice, pH regulator, defoaming agent. Through the mode, the multifunctional decorative material can be researched and developed by combining a building and a decorative surface, is convenient to construct, has good weather resistance, can be randomly designed, cut and spliced, can generate various stone-like and brick-like effects by being pasted by a special adhesive, can greatly reduce the load of a wall body, has the weight per square meter about 1/3 of wall bricks, and can solve the problems of difficulty and safety of high-altitude construction. However, the water content of the formula of the flexible sand-wall-shaped coating layer is 20-25%, the main bonding component is water-based acrylic polymer emulsion, the coating strength can be established only by completely volatilizing water, in order to improve the drying speed, a longer drying production line needs to be equipped, the floor area is large, the production efficiency is low, the thickness of the real stone paint coating layer is about 1-2 mm, the drying of the surface layer is too fast due to the baking, a large number of air holes can be generated due to the moisture coming out of the bottom layer, and the appearance and the performance of the coating are influenced.
Therefore, it is an urgent technical problem in the art to develop a color sand decorative sheet without drying, having no air holes in the coating and excellent stain resistance.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a colored sand decorative plate and a preparation method and application thereof, wherein the colored sand decorative plate comprises a base layer, a hot-melt coating, a colored sand layer and a finish paint layer which are sequentially arranged, and colored sand of the colored sand layer is embedded into the hot-melt resin layer; the hot-melt coating can be laid on the color sand layer without drying, so that air vents in the color sand decorative plate caused by volatilization of moisture can be avoided, the color sand decorative plate which is free of air holes, good in flexibility and excellent in stain resistance is finally obtained, and the hot-melt coating has important research value.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides a color sand decorative plate, which comprises a base layer, a hot-melt coating, a color sand layer and a finish paint layer which are sequentially arranged;
and the color sand in the color sand layer is embedded into the hot-melt coating.
The cross-sectional structure of the colored sand decorative board provided by the invention is schematically shown in fig. 1, wherein 1 represents a base layer, 2 represents a hot-melt coating layer, 3 represents a colored sand layer and 4 represents a finish paint layer.
According to the color sand decorative plate provided by the invention, the hot-melt coating is selected to match with the color sand layer, on the one hand, the hot-melt coating has the characteristic of good low-temperature flexibility, so that the obtained color sand decorative plate has certain flexibility at the temperature of-25 ℃, and the further prepared decorative plate product can be paved on the surfaces of most of base materials needing decoration; in the second aspect, the hot-melt coating has certain viscosity and cohesive force without being dried, a color sand layer can be directly paved, the problems of low drying speed and low efficiency of the coating are solved, no solvent is volatilized in the production process of the hot-melt coating, and the obtained color sand decorative plate has no air holes and the sand grains of the color sand layer are clear; and in the third aspect, the color sand layer is stable in color and good in aging resistance, the color sand layer is tightly bonded on the surface of the hot-melt coating, and part of color sand of the color sand layer is embedded into the hot-melt coating, so that the bonding strength of the color sand layer and the hot-melt coating is further enhanced, sand falling is avoided in subsequent processing and application, and the color sand decorative plate with excellent decorative effect and long service life is finally obtained.
Preferably, the base layer comprises any one of a non-woven fabric, a glass fiber net or a glass fiber cloth.
Preferably, the raw materials for preparing the hot-melt coating comprise hot melt adhesive.
The hot melt adhesive provided by the invention has the characteristics of strong adhesion, good low-temperature flexibility, stable chemical property, no odor, transparency, no toxicity, good acid-base corrosion resistance and excellent water resistance, can be produced by a new material (Shanghai) of Sinorrey, and mainly comprises a thermoplastic polyolefin elastomer.
Preferably, the raw materials for preparing the hot-melt coating also comprise an antioxidant and/or a light stabilizer.
Preferably, the hot melt coating is prepared from the following raw materials in parts by weight: 980-1000 parts of hot melt adhesive, 1-10 parts of antioxidant and 1-10 parts of light stabilizer.
As a preferred technical scheme of the invention, as the colored sand decorative plate is mainly applied outdoors, in order to prevent the color change (yellowing) of the hot melt adhesive in the hot melt coating in the hot processing process and improve the aging resistance of the hot melt coating in the outdoor solarization process, the invention adds the antioxidant and the light stabilizer in a specific part into the preparation raw materials of the hot melt coating, wherein the antioxidant can be a hindered phenol antioxidant, such as German Pasv and Irganox1010 antioxidant; the light stabilizer can be selected from Pasteur Germany and TINUVIN 328.
The hot melt adhesive can be 982 parts by weight, 984 parts by weight, 986 parts by weight, 988 parts by weight, 990 parts by weight, 992 parts by weight, 994 parts by weight, 996 parts by weight or 998 parts by weight and the like.
The antioxidant may be 2 parts by weight, 3 parts by weight, 4 parts by weight, 5 parts by weight, 6 parts by weight, 7 parts by weight, 8 parts by weight, 9 parts by weight, or the like.
The light stabilizer may be 2 parts by weight, 3 parts by weight, 4 parts by weight, 5 parts by weight, 6 parts by weight, 7 parts by weight, 8 parts by weight, 9 parts by weight, or the like.
Preferably, the material of the colored sand layer comprises colored sand.
Preferably, the colored sand comprises resin colored sand and/or sintered colored sand, and is further preferably sintered colored sand.
As the preferred technical scheme of the invention, the colored sand of the colored sand layer provided by the invention comprises resin colored sand and/or sintered colored sand; the resin coloring colored sand and the sintering colored sand have the characteristics of stable color and good aging resistance.
Preferably, the grain size of the colored sand is 20-100 meshes, such as 30 meshes, 40 meshes, 50 meshes, 60 meshes, 70 meshes, 80 meshes, 90 meshes or 100 meshes.
Preferably, the content of the colored sand with the grain size not larger than 20 meshes in the colored sand is not larger than 0.1% by mass, such as 0.09%, 0.08%, 0.07%, 0.06%, 0.05%, 0.04%, 0.03%, 0.02%, 0.01% and the like.
Preferably, the mass percentage content of the colored sand larger than 20 meshes and not larger than 30 meshes in the colored sand is 10-30%, such as 12%, 14%, 16%, 18%, 20%, 22%, 24%, 26% or 28%.
Preferably, the mass percentage content of the colored sand larger than 30 meshes and not larger than 40 meshes in the colored sand is 30-60%, such as 33%, 36%, 39%, 43%, 46%, 49%, 53%, 56% or 59%.
Preferably, the mass percentage content of the colored sand larger than 40 meshes and not larger than 60 meshes in the colored sand is 20-50%, such as 23%, 26%, 29%, 33%, 36%, 39%, 43%, 46% or 49%.
Preferably, the mass percentage of the colored sand larger than 60 meshes and not larger than 80 meshes is 5-10%, such as 5.5%, 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9% or 9.5%.
Preferably, the content of the colored sand larger than 80 meshes and not larger than 100 meshes in the colored sand is not larger than 5% by mass, such as 4.5%, 4%, 3.5%, 3%, 2.5%, 2%, 1.5%, 1% or 0.5% by mass.
As a preferred technical scheme, the color sand layer comprises the following materials in percentage by weight: the color sand not greater than 20 meshes is not greater than 0.1%, the color sand greater than 20 meshes and not greater than 30 meshes is 10-30%, the color sand greater than 30 meshes and not greater than 40 meshes is 30-60%, the color sand greater than 40 meshes and not greater than 60 meshes is 20-50%, the color sand greater than 60 meshes and not greater than 80 meshes is 5-10%, and the color sand greater than 80 meshes and not greater than 100 meshes is not greater than 5%; the color sand layer formed by the mixed color sand obtained by mutually matching the color sands with different particle sizes can be fully covered with the hot-melting coating, has no transparent bottom and can enable the color sand to be embedded into the hot-melting coating, so that the problem that the hot-melting glue seeps out after sand falling and sand pressing can be effectively avoided, and the excellent decorative effect can be further met.
Preferably, the thickness of the topcoat layer is 100 to 200 μm, such as 110 μm, 120 μm, 130 μm, 140 μm, 150 μm, 160 μm, 170 μm, 180 μm, 190 μm, or the like.
Preferably, the finish paint layer is a water-based acrylic resin finish paint layer, a thermoplastic resin finish paint layer or a water-based polyurethane finish paint layer.
The color sand decorative plate is characterized in that when the finish paint layer is a water-based acrylic resin finish paint layer or a thermoplastic resin finish paint layer, the finally obtained color sand decorative plate is more suitable for the wall surface; and when the finish paint layer is the waterborne polyurethane finish paint layer, the obtained colored sand decorative plate is more suitable for the ground.
Preferably, the raw material for preparing the water-based acrylic resin finish paint layer comprises water-based acrylic emulsion. As a preferred technical scheme, the preparation raw material of the finishing paint layer comprises water-based acrylic emulsion, and the water-based acrylic emulsion can be directly coated on the hot-melt coating and the color sand layer mixed coating at the temperature of about 80 ℃, and is easier to dry than the traditional method at normal temperature.
Preferably, the raw materials for preparing the water-based acrylic resin finish paint layer comprise the following components in parts by weight: 400-600 parts of water-based acrylic emulsion, 1-2 parts of preservative, 1-2 parts of mildew preventive, 20-40 parts of film-forming additive, 2-5 parts of thickening agent, 400-500 parts of water and 20-30 parts of antifreezing agent.
In the present invention, the acrylic emulsion may be 420 parts by weight, 440 parts by weight, 460 parts by weight, 480 parts by weight, 500 parts by weight, 520 parts by weight, 540 parts by weight, 560 parts by weight, 580 parts by weight, or the like.
The preservative may be 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, or 1.9 parts by weight, or the like.
The mildew inhibitor may be 1.1 parts by weight, 1.2 parts by weight, 1.3 parts by weight, 1.4 parts by weight, 1.5 parts by weight, 1.6 parts by weight, 1.7 parts by weight, 1.8 parts by weight, 1.9 parts by weight, or the like.
The coalescent may be 22 parts by weight, 24 parts by weight, 26 parts by weight, 28 parts by weight, 30 parts by weight, 32 parts by weight, 34 parts by weight, 36 parts by weight, 38 parts by weight, or the like.
The thickener may be 2.3 parts by weight, 2.6 parts by weight, 2.9 parts by weight, 3.3 parts by weight, 3.6 parts by weight, 3.9 parts by weight, 4.3 parts by weight, 4.6 parts by weight, 4.9 parts by weight, or the like.
The water may be 410 parts by weight, 420 parts by weight, 430 parts by weight, 440 parts by weight, 450 parts by weight, 460 parts by weight, 470 parts by weight, 480 parts by weight, 490 parts by weight, or the like.
The antifreeze can be 21 parts by weight, 22 parts by weight, 23 parts by weight, 24 parts by weight, 25 parts by weight, 26 parts by weight, 27 parts by weight, 28 parts by weight, 29 parts by weight, or the like.
Preferably, the raw material for preparing the thermoplastic resin finish paint layer comprises PMMA resin.
As a preferred technical scheme, the raw materials for preparing the thermoplastic resin finish paint layer provided by the invention comprise PMMA resin, the PMMA resin has high transparency and excellent weather resistance, the PMMA resin is used as the raw materials for preparing the finish paint layer, so that the finish paint layer has excellent anti-fouling performance, the glass transition temperature of the PMMA resin is about 105 ℃, the PMMA resin can quickly form a coating layer at the temperature lower than 80 ℃, a drying step is not needed, the working procedures are saved, and the phenomenon that the coating layer generates cavities due to solvent volatilization is avoided; and the rolling procedure can be matched to ensure that the surface of the coating presents two different effects of high gloss and matte, so that the selection of the surfaces with different roughness is realized.
In the present invention, the PMMA resin may be a PMMA resin of sumitomo chemical, and is given by LG 2.
Preferably, the preparation raw material of the waterborne polyurethane finish paint layer comprises a component A and a component B, wherein the component A comprises 990-1000 parts by weight of waterborne polyurethane emulsion, 1-2 parts by weight of defoaming agent and 2-4 parts by weight of leveling agent according to parts by weight, and the component B comprises curing agent.
The aqueous polyurethane emulsion can be 991 weight parts, 992 weight parts, 993 weight parts, 994 weight parts, 995 weight parts, 996 weight parts, 997 weight parts, 998 weight parts, 999 weight parts or the like.
The defoamer can be 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, or 1.9 parts by weight, and the like.
The leveling agent may be 2.2 parts by weight, 2.4 parts by weight, 2.6 parts by weight, 2.8 parts by weight, 3 parts by weight, 3.2 parts by weight, 3.4 parts by weight, 3.6 parts by weight, 3.8 parts by weight, or the like.
Preferably, the mass ratio of the component A to the component B is (4-6: 1), such as 4.2:1, 4.4:1, 4.6:1, 4.8:1, 5:1, 5.2:1, 5.4:1, 5.6:1 or 5.8: 1.
In a second aspect, the present invention provides a method for preparing the colored sand decorative board according to the first aspect, wherein the method comprises the following steps:
(1) coating the preparation raw material of the hot-melt coating on the surface of the base layer to form a composite layer;
(2) paving color sand on the surface of the hot-melt coating of the composite layer obtained in the step (1), and rolling to obtain a color sand composite layer;
(3) and (3) coating the preparation raw material of the finish paint layer on the surface of the color sand layer of the color sand composite layer obtained in the step (2) to obtain the color sand decorative plate.
Preferably, the thickness of the coating in step (1) is 1.5-2 mm, such as 1.55mm, 1.6mm, 1.65mm, 1.7mm, 1.75mm, 1.8mm, 1.85mm, 1.9mm or 1.95 mm.
Preferably, the linear speed of the coating in the step (1) is 8-10 m/min, such as 8.2m/min, 8.4m/min, 8.6m/min, 8.8m/min, 9m/min, 9.2m/min, 9.4m/min, 9.6m/min or 9.8 m/min.
Preferably, the temperature of the coating in the step (1) is 100 to 165 ℃, for example, 105 ℃, 110 ℃, 115 ℃, 120 ℃, 125 ℃, 130 ℃, 140 ℃, 150 ℃ or 160 ℃, and the like, and the raw material for preparing the hot-melt coating is in a molten state in the temperature range.
Preferably, the laying amount of the colored sand in the step (2) is 700-1000 g/m2,750g/m2、800g/m2、850g/m2、900g/m2、920g/m2、940g/m2、960g/m2Or 980g/m2And the laying amount is 700-1000 g/m2Within this scope, can make follow-up obtain the various sand part embedding of various sand layer after rolling the hot melt line coating and can not appear the problem that the hot melt adhesive oozes, if lay the volume too little, just can lead to establishing the layer after rolling and can not cover hot melt coating completely, produce the problem that the hot melt adhesive spills, if lay the volume too big, then can lead to the various sand embedding volume too much, hot melt adhesive of hot melt coating is extruded.
Preferably, the paving temperature in the step (2) is 80-120 ℃, for example, 81 ℃, 82 ℃, 83 ℃, 84 ℃, 85 ℃, 86 ℃, 87 ℃, 88 ℃, 89 ℃, 95 ℃, 100 ℃, 105 ℃, 110 ℃ or 115 ℃ and the like, at which the viscosity and the adhesive force of the hot melt adhesive of the hot melt coating are increased but are not completely cured, and the colored sand of the colored sand layer can be partially embedded into the hot melt coating through the rolling step after the colored sand is paved, and the hot melt coating is not extruded.
Preferably, the rolling pressure in step (2) is 0.2-0.4 MPa, such as 0.21MPa, 0.22MPa, 0.23MPa, 0.24MPa, 0.25MPa, 0.26MPa, 0.27MPa, 0.28MPa or 0.29 MPa.
Preferably, the top paint layer in the step (3) is a water-based acrylic resin top paint layer or a water-based polyurethane top paint layer, and then the drying step is included.
Preferably, the finishing paint layer is a thermoplastic resin finishing paint layer, and the coating method is casting coating.
Preferably, the finishing paint layer is a thermoplastic resin finishing paint layer, and the coating temperature is 160-200 ℃, such as 165 ℃, 170 ℃, 175 ℃, 180 ℃, 185 ℃, 190 ℃ or 195 ℃.
Preferably, the top coat layer in the step (3) is a hot-melt resin top coat layer, and a rolling step is further included after the coating is finished.
As a preferred technical scheme, the preparation method comprises the following steps:
(1) coating the raw materials for preparing the hot-melt coating on the surface of a base layer at the temperature of 100-165 ℃ according to the linear speed of 8-10 m/min to form a composite layer;
(2) the color sand is paved at the temperature of 80-120 ℃ according to the paving amount of 700-1000 g/m2Paving the composite layer obtained in the step (1) on the surface of the hot-melt coating, and pressing under 0.2-0.4 Mpa to obtain a color sand composite layer;
(3) and (3) coating the preparation raw material of the finish paint layer on the surface of the color sand layer of the color sand composite layer obtained in the step (2) to obtain the color sand decorative plate.
As a preferred technical scheme, the preparation method of the color sand decorative plate provided by the invention comprises the following steps: (1) gluing: fixing a base material on a film spreading frame, heating a preparation raw material of a hot-melt coating to 100-165 ℃ to ensure that the raw material is in a molten state, starting a feeding pump, extruding the preparation raw material of the hot-melt coating in the molten state, starting a main machine at a low speed, closing a die head and a gum wheel, carrying out hanging coating according to the linear speed of 8-10 m/min, observing the uniformity and the smoothness of coating, checking whether particles and lumps exist in the coating, whether the die head has gum blocking and other abnormalities; and measuring the thickness of the product by using a vernier caliper, confirming that the thickness of the coating is 0.15-0.2 mm, if there is a deviation, andadjusting the gap of the die head or the glue supply amount to obtain a composite layer after the completion; (2) sand coating and rolling: pouring the color sand with different particle sizes into a sand hopper along with the temperature of the composite layer being reduced to 80-120 ℃, lifting the color sand to a high position by using a lifter, and shakeout the sand grains under the action of gravity according to the laying amount of 700-1000 g/m2Timely supplementing sand to ensure the shakeout uniformity, covering the shakeout on a hot-melt coating, adhering color sand by using a melt adhesive, pressing and rolling by using a plurality of sand coating rollers, adhering sand grains on a sheet melt adhesive, embedding part of the color sand into the hot-melt coating, returning the redundant color sand into a sand return pipeline, conveying the returned sand to a specified position, and intensively reusing; (3) coating finish paint: if the raw material for preparing the finish paint layer comprises PMMA resin, placing the PMMA resin in an extruder, opening the extruder to heat, adjusting the temperature to 160-200 ℃, starting a feeding pump to extrude the PMMA resin after the temperature reaches, slowly starting a host machine, closing a die head and a back adhesive wheel, blade-coating and gluing, observing the gluing uniformity and smoothness, adjusting the coating thickness of the PMMA resin by adjusting the width of an extrusion die head, needing no additional cooling process, but needing a process of rolling a polytetrafluoroethylene roller, controlling the rolling pressure to be 0.1-0.2 Mpa, and selecting the polytetrafluoroethylene roller with a smooth surface pit or a roller with a concave-convex surface of 50-100 mu m if a smooth surface is adopted, wherein the obtained anti-fouling layer is a high-gloss coating; if a roller with the surface of a concave-convex pit of 50-100 mu m is adopted, the obtained anti-fouling layer is a matte coating; if the preparation raw material of the finish paint layer comprises water-based acrylic emulsion, the water-based acrylic emulsion is sprayed on the surface of the colored sand layer and is dried by hot air, and the colored sand decorative plate can be obtained.
In a third aspect, the present invention provides a use of the colored sand decorative board of the first aspect in building.
Compared with the prior art, the invention has the following beneficial effects:
(1) the color sand decorative plate provided by the invention comprises a base layer, a hot-melt coating, a color sand layer and a finish paint layer which are sequentially arranged; and the color sand of the color sand layer is embedded into the hot-melt resin layer; through selecting hot melting coating collocation color sand layer, utilize the advantage that does not have solvent, bonding strength is high, low temperature pliability is good among the hot melting coating, need not the advantage that the color sand layer can be laid to dry, solved current color sand decorative board dry slow, coating outward appearance and the relatively poor problem of performance.
(2) The hot-melt coating in the color sand decorative plate provided by the invention has certain viscosity and cohesive force in a molten state, and color sand can be directly paved, so that no solvent is volatilized in the production process of the color sand decorative plate, the coating is free of air holes, and sand grains in a color sand layer are clear; and the color sand layer has stable color and is protected by the anti-fouling layer, so that the whole coating system has good aging resistance, excellent decorative effect and longer service life.
Drawings
Fig. 1 is a schematic cross-sectional structure diagram of a color sand decorative board provided by the invention, wherein, 1-a base layer, 2-a hot-melt coating layer, 3-a color sand layer and 4-a finishing paint layer.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.
Example 1
A cross-sectional structure schematic diagram of a colored sand decorative plate is shown in figure 1, and the colored sand decorative plate comprises a base layer 1, a hot-melt coating layer 2, a colored sand layer 3 and a finish paint layer 4 which are sequentially arranged;
wherein, the base layer 1 is a non-woven fabric with the thickness of 1 mm;
the thickness of the hot melt resin layer 2 is 1.8mm, and the preparation raw materials are melts composed of 990 parts by weight of hot melt adhesive (Sinoruert New materials (Shanghai) Co., Ltd.), 5 parts by weight of antioxidant (German BASF, Irganox1010 antioxidant) and 5 parts by weight of light stabilizer (BASF, light stabilizer TINUVIN 328);
the color sand layer 3 is made of mixed sintered color sand which consists of 0.1 percent of sintered color sand with 20 meshes, 20 percent of sintered color sand with 30 meshes, 40 percent of sintered color sand with 40 meshes, 30 percent of sintered color sand with 60 meshes, 7.5 percent of sintered color sand with 80 meshes and 2.4 percent of sintered color sand with 100 meshes in percentage by weight;
the thickness of the topcoat layer 4 was 150 μm, and the starting material was PMMA resin (japanese sumitomo chemical, LG 2);
the preparation method of the color sand decorative plate provided by the embodiment comprises the following steps:
(1) coating the melt on the surface of a base layer at 150 ℃ according to the linear speed of 9m/min to form a composite layer;
(2) the mixed sintered color sand is paved at the temperature of 85 ℃ according to the paving amount of 800g/m2Laying the composite layer obtained in the step (1) on the surface of the hot-melt coating, and pressing under 0.3Mpa to obtain a color sand composite layer;
(3) and (3) coating PMMA resin on the surface of the colored sand layer of the colored sand composite layer obtained in the step (2) at 180 ℃, and pressing by using a polytetrafluoroethylene roller with a smooth surface under 0.15Mpa to obtain the colored sand decorative plate.
Example 2
A color sand decorative plate has the same structure as that of embodiment 1, and comprises a base layer, a hot-melt coating, a color sand layer and a finish paint layer which are sequentially arranged;
wherein the base layer is a glass fiber net with the thickness of 0.3 mm;
the thickness of the hot melt resin layer is 1.8mm, and the preparation raw materials are melt which is composed of 980 parts by weight of hot melt adhesive (Sinoruert New materials (Shanghai) Co., Ltd.), 1 part by weight of antioxidant (German Pasv, Irganox1010 antioxidant) and 1 part by weight of light stabilizer (Pasv, light stabilizer TINUVIN 328);
the color sand layer is made of sintered color sand which consists of 0.1 percent of sintered color sand with 20 meshes, 10 percent of sintered color sand with 30 meshes, 30 percent of sintered color sand with 40 meshes, 50 percent of sintered color sand with 60 meshes, 5 percent of sintered color sand with 80 meshes and 4.9 percent of sintered color sand with 100 meshes in percentage by weight;
the thickness of the topcoat layer was 150 μm, and the starting material was a PMMA resin (japanese sumitomo chemical, LG 2);
the preparation method of the color sand decorative plate provided by the embodiment comprises the following steps:
(1) coating the melt on the surface of a base layer at 100 ℃ according to the linear speed of 8m/min to form a composite layer;
(2) the mixed sintered color sand is paved at the temperature of 80 ℃ according to the paving amount of 700g/m2Laying the composite layer obtained in the step (1) on the surface of the hot-melt coating, and pressing under 0.3Mpa to obtain a color sand composite layer;
(3) and (3) coating PMMA resin on the surface of the colored sand layer of the colored sand composite layer obtained in the step (2) at 160 ℃, and pressing by using a polytetrafluoroethylene roller with the surface of a concave-convex pit of 80 microns under 0.15Mpa to obtain the colored sand decorative plate.
Example 3
A color sand decorative plate has the same structure as that of embodiment 1, and comprises a base layer, a hot-melt coating, a color sand layer and a finish paint layer which are sequentially arranged;
wherein the base layer is glass fiber cloth with the thickness of 0.3 mm;
the thickness of the hot melt resin layer is 1.8mm, and the preparation raw materials are melts composed of 1000 parts by weight of hot melt adhesive (Sinoruert New materials (Shanghai) Co., Ltd.), 10 parts by weight of antioxidant (German Pasv, Irganox1010 antioxidant) and 10 parts by weight of light stabilizer (Pasv, light stabilizer TINUVIN 328);
the color sand layer is made of sintered color sand which consists of 0.1 percent of sintered color sand with 20 meshes, 30 percent of sintered color sand with 30 meshes, 30 percent of sintered color sand with 40 meshes, 30 percent of sintered color sand with 60 meshes, 8 percent of sintered color sand with 80 meshes and 1.9 percent of sintered color sand with 100 meshes in percentage by weight;
the thickness of the topcoat layer was 150 μm, and the starting material was a PMMA resin (japanese sumitomo chemical, LG 2);
the preparation method of the color sand decorative plate provided by the embodiment comprises the following steps:
(1) coating the melt on the surface of a base layer at 165 ℃ according to the linear speed of 10m/min to form a composite layer;
(2) the mixed sintered color sand is paved at the temperature of 90 ℃ according to the paving amount of 1000g/m2Laying the composite layer obtained in the step (1) on the surface of the hot-melt coating, and pressing under 0.3Mpa to obtain a color sand composite layer;
(3) and (3) coating PMMA resin on the surface of the colored sand layer of the colored sand composite layer obtained in the step (2) at the temperature of 200 ℃, and pressing by using a polytetrafluoroethylene roller with a smooth surface under the pressure of 0.15Mpa to obtain the colored sand decorative plate.
Example 4
A colored sand decorative plate is different from the embodiment 1 only in that sintered colored sand of a colored sand layer is completely replaced by resin colored sand, and other structures, parameters and preparation methods are the same as those of the embodiment 1.
Example 5
A color sand decorative plate has the same structure as that of the embodiment 1, and comprises a non-woven fabric with the thickness of 1mm as a base layer; a hot melt resin layer with a thickness of 1.8mm (the raw material for preparing the hot melt resin layer is a melt which is composed of 990 parts by weight of hot melt adhesive (Sinorrex New Material (Shanghai)) by weight, 5 parts by weight of antioxidant (Pasv, Irganox1010 antioxidant, Germany) and 5 parts by weight of light stabilizer (Pasv, light stabilizer TINUVIN 328); the color sand layer (the material is mixed sintering color sand which is composed of 0.1 percent of 20-mesh sintering color sand, 20 percent of 30-mesh sintering color sand, 40 percent of sintering color sand, 30 percent of 60-mesh sintering color sand, 7.5 percent of 80-mesh sintering color sand and 2.4 percent of 100-mesh sintering color sand according to the weight percentage); a topcoat layer having a thickness of 150 μm (the preparation raw material was a paint composed of, in parts by weight, 500 parts by weight of an aqueous acrylic emulsion (bardifen, 996AD, 1.5 parts by weight of a preservative (THOR, B20, 1.5 parts by weight of a fungicide (THOR, EPW), 30 parts by weight of a film-forming aid (Runtai, dodecanol ester, 3 parts by weight of a thickener (dow, RM-8W, 450 parts by weight of water, and 25 parts by weight of an antifreeze (santengai, propylene glycol));
the preparation method of the colored sand decorative plate comprises the following steps:
(1) coating the melt on the surface of a base layer at 150 ℃ according to the linear speed of 9m/min, wherein the coating thickness is 1.8mm, and forming a composite layer;
(2) paving the mixed sintered colored sand on the surface of the hot-melt coating of the composite layer obtained in the step (1) at 85 ℃ according to the paving amount of 800g/m2, and pressing under 0.3Mpa to obtain a colored sand composite layer;
(3) and (3) coating the coating on the surface of the colored sand layer of the colored sand composite layer obtained in the step (2), and drying by hot air to obtain the colored sand decorative plate.
Example 6
The color sand decorative plate is different from the color sand decorative plate in the embodiment 1 only in that the particle sizes of sintered color sand of a color sand layer are all 20 meshes, and other structures, parameters and preparation methods are the same as those of the embodiment 1.
Example 7
The color sand decorative plate is different from the color sand decorative plate in the embodiment 1 only in that the grain diameter of sintered color sand of a color sand layer is 30 meshes, and other structures, parameters and preparation methods are the same as those of the embodiment 1.
Example 8
The color sand decorative plate is different from the color sand decorative plate in the embodiment 1 only in that the grain diameter of sintered color sand of a color sand layer is 40 meshes, and other structures, parameters and preparation methods are the same as those of the embodiment 1.
Example 9
The color sand decorative plate is different from the color sand decorative plate in the embodiment 1 only in that the particle sizes of sintered color sand of a color sand layer are all 60 meshes, and other structures, parameters and preparation methods are the same as those of the embodiment 1.
Example 10
The color sand decorative plate is different from the color sand decorative plate in the embodiment 1 only in that the particle sizes of sintered color sand of a color sand layer are all 80 meshes, and other structures, parameters and preparation methods are the same as those of the embodiment 1.
Example 11
The color sand decorative plate is different from the color sand decorative plate in the embodiment 1 only in that the particle sizes of sintered color sand of a color sand layer are all 100 meshes, and other structures, parameters and preparation methods are the same as those of the embodiment 1.
Example 12
The color sand decorative plate is different from the embodiment 1 only in that the sintered color sand of the color sand layer is a sintered color sand mixture which consists of 15 percent of sintered color sand with 30 meshes, 40 percent of sintered color sand with 40 meshes, 40 percent of sintered color sand with 60 meshes, 3 percent of sintered color sand with 80 meshes and 2 percent of sintered color sand with 100 meshes in percentage by mass, and other structures, parameters and preparation methods are the same as those of the embodiment 1.
Example 13
A color sand decorative plate is only different from the embodiment 1 in that a surface paint layer is a water-based polyurethane paint-free layer, and the preparation raw materials of the color sand decorative plate comprise a component A and a component B in a mass ratio of 5: 1;
the component A comprises the following components in parts by weight: 995 parts by weight of aqueous polyurethane emulsion (Wanhua chemical, 8576), 1.5 parts by weight of defoaming agent (Nopulac, NXZ) and 3 parts by weight of leveling agent (Tao Shi chemical, RM-2020);
the component B is a curing agent (Wanhua chemical, 268).
Comparative example 1
A colored sand decorative sheet, which is different from the embodiment 1 in structure only in that the colored sand of the colored sand layer is not embedded in the hot-melt coating;
the preparation method comprises the following steps:
(1) coating the melt on the surface of a base layer at 150 ℃ according to the linear speed of 9m/min, wherein the coating thickness is 1.8mm, and forming a composite layer;
(2) after the composite layer is cured, the mixed sintered color sand is paved in an amount of 800g/m2Paving the composite layer obtained in the step (1) on the surface of the hot-melt coating to obtain a color sand composite layer;
(3) and (3) coating PMMA resin on the surface of the colored sand layer of the colored sand composite layer obtained in the step (2) at 180 ℃, and pressing by using a polytetrafluoroethylene roller with a smooth surface under 0.15Mpa to obtain the colored sand decorative plate.
Comparative example 2
The utility model provides a composite decoration board, is including the flexible basic unit, flexible sand wall form dope layer, the anti-soil protection finish paint layer that set gradually, flexible sand wall form dope layer constitutes the material that includes following parts by mass: water: 110 parts, cellulose ether: 3 parts of a film-forming assistant: 8 parts of an antifreezing agent: 8 parts, elastic emulsion: 170 parts of natural colored sand: 700 parts, ph adjuster: 1 part, defoaming agent: 1 part;
the preparation method of the composite decorative board comprises the following steps:
(1) spraying the material of the flexible base layer on a conveyor belt capable of demoulding;
(2) laying an alkali-resistant glass fiber mesh on the flexible base layer, drying the base layer in a drying room, and demolding the flexible base layer;
(3) polishing the demolded flexible base layer, and coating a primer on the surface of the demolded flexible base layer;
(4) after the primer is coated, connecting a flexible sand wall-shaped coating layer on the primer, and drying the primer by a drying room;
(5) and after the drying is finished, coating an anti-fouling protective finish paint layer on the flexible sand wall-shaped coating layer, completely drying the anti-fouling protective finish paint layer, and rolling the anti-fouling protective finish paint layer for later use to obtain the composite decorative plate.
And (3) performance testing:
(1) and (3) glue leakage condition: observing whether the edge of the obtained decorative plate or the sand and the sand have glue leakage or not;
(2) stain resistance: testing according to a testing method provided by GB/T9780-2013;
(3) resistance to artificial weather aging: testing according to a testing method provided by GB/T1865-2009;
(4) flexibility: testing according to a testing method provided by GB/T1748-1979;
(5) water absorption amount 2h (g): testing according to a testing method provided by JG/T157-2009;
(6) appearance: the test is carried out according to the requirements of appearance quality in the table 2 of JC/T2219-2014.
The decorative boards provided in examples 1 to 13 and comparative examples 1 to 2 were tested according to the above test method, and the test results are shown in table 1:
TABLE 1
As can be seen from the data in table 1:
the color sand decorative plates provided by the embodiments 1 to 3 and 12 to 13 have no abnormal appearance and no glue leakage, the stain resistance grade can reach 0 grade, and the artificial weather aging resistance test shows that 3000h has no abnormality, the flexibility (50cm) has no crack, and the water absorption capacity of 2h is only 0.1 g.
Comparing example 1 with comparative example 1, it can be found that the color sand decorative plate with the color sand of the color sand layer not embedded into the hot-melt coating can have sand falling, so that the problem of chromatic aberration is caused, edge glue leakage occurs, and the glue layer of the glue leakage area is initially selected to change color after 1500h of artificial weather aging resistance test; comparing example 1 with comparative example 2, it can be seen that the decorative board obtained by using the flexible sand wall-shaped coating layer in the prior art has the defects of holes caused by drying, the pollution resistance grade is grade 2, the artificial weather aging resistance test shows that 1000h discoloration and cracking occur, and the water absorption amount of 2h is up to 0.8 g.
Further comparing the example 1 with the example 6, the color sand decorative plate obtained in the example 6 has holes locally, glue leaks between sand, the stain resistance grade is 1 grade, and the glue layer is discolored in the artificial climate aging resistance test for 1500 h; comparing the example 1 with the example 7, the color sand decorative plate obtained in the example 7 can be found to have glue leakage between sand and has glue layer discoloration after 1500h of artificial weather aging resistance test; comparing the example 1 with the examples 10 to 11, it can be found that the color sand decorative boards obtained in the examples 10 and 11 have edge glue leakage, and the glue layer is discolored in a weathering resistance test for 1500 h; comparing example 1 with example 5, it can be seen that the water absorption capacity of the colored sand decorative board 2h obtained in example 5 is 0.5 g; comparing example 1 with example 6, the color sand decorative plate obtained in example 6 has the defects of local holes, glue leakage between sand, pollution resistance grade of 1 and stain resistance of 1500h in a man-made climate aging resistance test.
The applicant states that the invention is described by the above embodiments, but the invention is not limited to the above process steps, i.e. it does not mean that the invention must be implemented by relying on the above process steps. It will be apparent to those skilled in the art that any modification of the present invention, equivalent substitutions of selected materials and additions of auxiliary components, selection of specific modes and the like, which are within the scope and disclosure of the present invention, are contemplated by the present invention.
Claims (10)
1. A color sand decorative plate is characterized by comprising a base layer, a hot-melt coating, a color sand layer and a finish paint layer which are sequentially arranged;
the color sand in the color sand layer is embedded into the hot-melt resin layer.
2. A painted sand decorative panel as claimed in claim 1, wherein the base layer comprises any one of a non-woven fabric, a glass fiber web or a glass fiber cloth.
3. The colored sand decorative board of claim 1 or 2, wherein the hot melt coating is prepared from raw materials comprising a hot melt adhesive;
preferably, the raw materials for preparing the hot-melt coating also comprise an antioxidant and/or a light stabilizer;
preferably, the preparation raw materials of the hot-melt coating comprise the following components in parts by weight: 980-1000 parts of hot melt adhesive, 1-10 parts of antioxidant and 1-10 parts of light stabilizer.
4. A colored sand decorative board according to any one of claims 1 to 3, wherein the material of the colored sand layer comprises colored sand;
preferably, the colored sand comprises resin colored sand and/or sintered colored sand, and further preferably sintered colored sand;
preferably, the particle size of the colored sand is 20-100 meshes;
preferably, the mass percentage content of the colored sand not greater than 20 meshes in the colored sand is not greater than 0.1%;
preferably, the mass percentage content of the colored sand with the granularity of more than 20 meshes and not more than 30 meshes in the colored sand is 10-30%;
preferably, the mass percentage content of the colored sand with the granularity of more than 30 meshes and not more than 40 meshes is 30-60%;
preferably, the mass percentage content of the colored sand with the granularity of more than 40 meshes and not more than 60 meshes in the colored sand is 20-50%;
preferably, the mass percentage content of the colored sand with the granularity of more than 60 meshes and not more than 80 meshes is 5-10%;
preferably, the mass percentage content of the colored sand larger than 80 meshes and not larger than 100 meshes in the colored sand is not larger than 5%.
5. A colored sand decorative sheet according to any one of claims 1 to 4, wherein the thickness of the topcoat layer is 100 to 200 μm;
preferably, the finish paint layer is a water-based acrylic resin finish paint layer, a thermoplastic resin finish paint layer or a water-based polyurethane finish paint layer;
preferably, the raw materials for preparing the water-based acrylic resin finish paint layer comprise water-based acrylic emulsion;
preferably, the raw materials for preparing the water-based acrylic resin finish paint layer comprise the following components in parts by weight: 400-600 parts of water-based acrylic emulsion, 1-2 parts of preservative, 1-2 parts of mildew preventive, 20-40 parts of film-forming additive, 2-5 parts of thickening agent, 400-500 parts of water and 20-30 parts of antifreezing agent;
preferably, the raw material for preparing the thermoplastic resin finish paint layer comprises PMMA resin;
preferably, the preparation raw materials of the waterborne polyurethane finish paint layer comprise a component A and a component B, wherein the component A comprises 990-1000 parts by weight of waterborne polyurethane emulsion, 1-2 parts by weight of defoaming agent and 2-4 parts by weight of leveling agent according to parts by weight, and the component B comprises curing agent;
preferably, the mass ratio of the component A to the component B is (4-6): 1.
6. A preparation method of the colored sand decorative plate as claimed in any one of claims 1 to 5, which comprises the following steps:
(1) coating the preparation raw material of the hot-melt coating on the surface of the base layer to form a composite layer;
(2) paving color sand on the surface of the hot-melt coating of the composite layer obtained in the step (1), and rolling to obtain a color sand composite layer;
(3) and (3) coating the preparation raw material of the finish paint layer on the surface of the color sand layer of the color sand composite layer obtained in the step (2) to obtain the color sand decorative plate.
7. The method according to claim 6, wherein the coating of step (1) has a thickness of 1.5 to 2 mm;
preferably, the linear speed of the coating in the step (1) is 8-10 m/min;
preferably, the temperature of the coating in the step (1) is 100-165 ℃;
preferably, the paving amount of the colored sand in the step (2) is 700-1000 g/m2;
Preferably, the temperature of the paving in the step (2) is 80-120 ℃;
preferably, the rolling pressure in the step (2) is 0.2-0.4 MPa.
8. The preparation method according to claim 6 or 7, wherein the topcoat layer in step (3) is an aqueous acrylic resin topcoat layer or an aqueous polyurethane topcoat layer, and the step of drying is further included after the coating;
preferably, the top paint layer in the step (3) is a thermoplastic resin top paint layer, and the coating method is casting coating;
preferably, the finishing paint layer in the step (3) is a thermoplastic resin finishing paint layer, and the coating temperature is 160-200 ℃;
preferably, the finishing paint layer in the step (3) is a thermoplastic resin finishing paint layer, and a rolling step is further included after the coating is finished.
9. The method according to any one of claims 6 to 8, characterized by comprising the steps of:
(1) coating the preparation raw material of the hot-melt coating on the surface of a base layer at 100-165 ℃ according to the linear speed of 8-10 m/min to form a composite layer;
(2) the color sand is paved at the temperature of 80-120 ℃ according to the paving amount of 700-1000 g/m2Hot melting of composite layer obtained in step (1)Pressing the surface of the coating under 0.2-0.4 Mpa to obtain a color sand composite layer;
(3) and (3) coating the preparation raw material of the finish paint layer on the surface of the color sand layer of the color sand composite layer obtained in the step (2) to obtain the color sand decorative plate.
10. Use of the colored sand decorative board of any one of claims 1 to 5 in construction.
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CN114559708A (en) * | 2022-03-04 | 2022-05-31 | 安徽凯辰新材料有限公司 | Fiber reinforced polymer self-adhesive film coiled material capable of being constructed in vertical face |
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