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CN-122013953-A - High-weather-resistance scratch-resistant PVC wallboard and preparation method thereof

CN122013953ACN 122013953 ACN122013953 ACN 122013953ACN-122013953-A

Abstract

The invention relates to a high weather-resistant scratch-resistant PVC wallboard and a preparation method thereof, and belongs to the technical field of new material preparation. The PVC wallboard is mainly prepared from a surface and bottom two-layer composition through a coextrusion process. The PVC wallboard prepared by the method has higher hardness and strength, higher scratch resistance and better weather resistance.

Inventors

  • LI JIANLI
  • LI ZHANQUAN

Assignees

  • 临沂天翊美森新材料科技有限公司

Dates

Publication Date
20260512
Application Date
20260403

Claims (9)

  1. 1. The high weather-resistant scratch-resistant PVC wallboard is characterized by being prepared from a surface layer and a bottom layer by a coextrusion process; The surface layer composition comprises 100 parts by weight of PVC resin, 20-25 parts by weight of glass fiber reinforced ABS material, 10-15 parts by weight of vinyl ester resin, 4-6 parts by weight of calcium-zinc stabilizer, 3-5 parts by weight of modified nano silicon dioxide, 8-12 parts by weight of rutile type titanium dioxide, 10-15 parts by weight of nano calcium carbonate, 0.3-0.5 part by weight of ethylhexyl methoxycinnamate, 0.3-0.5 part by weight of 2-hydroxy-4-methoxybenzophenone and 0.8-1.2 parts by weight of oxidized polyethylene wax; The bottom layer composition comprises 100 parts by weight of PVC resin, 4-5 parts by weight of calcium-zinc stabilizer, 6-8 parts by weight of chlorinated polyethylene, 1.5-2.5 parts by weight of processing aid, 2-4 parts by weight of titanium dioxide, 40-60 parts by weight of calcium carbonate, 5-8 parts by weight of flame retardant, 0.5-0.8 part by weight of stearic acid and 0.4-0.6 part by weight of polyethylene wax.
  2. 2. The PVC wallboard of claim 1, wherein the flame retardant in the primer composition is a mixture of antimony trioxide, zinc borate.
  3. 3. The PVC wallboard of claim 2, wherein the weight ratio of antimony trioxide to zinc borate is 3:1.
  4. 4. A PVC wallboard according to any of claims 1 to 3, wherein the method of preparing the modified nano-silica in the skin composition is: Dispersing nano silicon dioxide in an ethanol-water mixed solution, adding hexadecyl trimethoxy silane, regulating the pH to 4.5-5.0, heating to 75-80 ℃, preserving heat for 4-6 hours, cooling to 60-70 ℃, adding methyl glucose sesquistearate, preserving heat for 2-3 hours, heating to 80-85 ℃, adding trimethyl siloxysilicate, preserving heat for 2-3 hours, washing a product with absolute ethyl alcohol, and drying at 60-70 ℃ to obtain the modified nano silicon dioxide.
  5. 5. The PVC wallboard according to claim 4, wherein the addition amount of the hexadecyltrimethoxysilane is 3% -5% of the mass of the nano silicon dioxide.
  6. 6. The PVC wallboard according to claim 4, wherein the methyl glucose sesquistearate is added in an amount of 5-8% of the mass of the nano silicon dioxide.
  7. 7. The PVC wallboard of claim 4, wherein the trimethyl siloxysilicate is added in an amount of 2-3% of the mass of the nano silica.
  8. 8. A method of making a PVC wall panel according to any one of claims 1 to 7, comprising the steps of: Step 1, pretreatment of surface raw materials: adding PVC resin, glass fiber reinforced ABS material and vinyl ester resin into a hot mixer, heating to 80 ℃, adding a calcium-zinc stabilizer and modified nano silicon dioxide for mixing, heating to 90 ℃, adding rutile type titanium white powder, nano calcium carbonate, ethylhexyl methoxycinnamate and 2-hydroxy-4-methoxybenzophenone for mixing, heating to 110-120 ℃, adding oxidized polyethylene wax, heating to 125 ℃, mixing, transferring the materials into a cold mixer, and cooling to 40-50 ℃ to obtain a surface layer raw material; Step 2, pretreatment of the bottom raw materials: Adding PVC resin, a calcium zinc stabilizer and chlorinated polyethylene into a hot mixer, adding a processing aid, titanium pigment, calcium carbonate and a flame retardant for mixing when the temperature is raised to 80 ℃, adding stearic acid and polyethylene wax for mixing when the temperature is raised to 100-110 ℃, transferring the materials into a cold mixer after the temperature reaches 120 ℃, and cooling to 45 ℃ to obtain a bottom raw material; step 3, extrusion granulation: plasticizing and granulating the cooled surface layer raw materials and the cooled bottom layer raw materials through an extruder to obtain surface layer material particles and bottom layer material particles, and drying the material particles at 80 ℃ for 3-4 hours for later use; step 4, co-extrusion molding: Plasticizing the bottom layer material particles into a molten state at the temperature of 175-185 ℃ of a main extruder, plasticizing the surface layer material particles at the temperature of 170-180 ℃ of an auxiliary extruder, co-extruding the surface layer material particles into 185-190 ℃ of a mold, feeding the surface layer material particles into a shaping tank after extrusion, carrying out vacuum shaping, gradually cooling and shaping through a cooling water tank at 15-20 ℃, pulling out the surface layer material particles through a tractor, cutting according to the specification, and carrying out post treatment.
  9. 9. The method of producing PVC wallboard according to claim 9, wherein the extrusion temperature in the step 3 is 160-170 ℃ in a barrel section, 170-180 ℃ in a compression section, and 175-185 ℃ in a homogenization section.

Description

High-weather-resistance scratch-resistant PVC wallboard and preparation method thereof Technical Field The invention belongs to the technical field of new material preparation, and relates to a high weather-resistant scratch-resistant PVC wallboard and a preparation method thereof. Background With the improvement of production technology, a lot of decorative materials gradually shift to the new development, and pvc wallboard is a fashion pet in the market today. In the current indoor and outdoor decorative material market, the PVC wallboard (polyvinyl chloride wallboard) occupies an important place by virtue of the characteristics of water resistance, moisture resistance, convenience in installation and high cost performance. However, for consumers, the durability of wallboard is always the most central consideration, with weather resistance (whether aging, deformation) and scratch resistance (whether scratch resistance) being critical in determining the useful life of the product. Weather resistance refers to the ability of a material to resist attack by natural environmental factors such as sunlight, temperature changes, wind and rain. For PVC wallboard, the weakest link is that in practical application, if the wallboard is installed outdoors where sunlight is directly emitted or is close to a heat source (such as kitchen range), the wallboard is extremely easy to twist, arch and even fall off after long-term heating, or the poor-quality or non-specially treated PVC wallboard still faces the risks of fading, surface chalking and embrittlement of materials caused by molecular chain breakage under long-term sun and rain. Scratch resistance is directly related to whether the wall surface can remain attractive for long-term use. PVC wallboard performs unevenly in this regard, depending on its density and surface treatment process. The surface hardness of the traditional common PVC sheet (such as a PVC foaming sheet) is low. According to the test, the pencil hardness of the low-density foam board is only 1-2H, and when the low-density foam board is rubbed by a key, a metal zipper or a hard object, the low-density foam board is extremely easy to generate plastic deformation, and dents or scratches which cannot be eliminated by wiping are left. If the scratch breaks the printed decorative layer or the coating on the surface, the aesthetic appearance is not only affected, but also hidden danger can be buried for subsequent stain penetration. Particularly in kitchen or public places, frequent wiping and rubbing can lead to rapid decrease of the surface gloss of the common PVC board, which is old. Disclosure of Invention The invention mainly aims to provide a high weather-resistant scratch-resistant PVC wallboard and a preparation method thereof, and the PVC wallboard not only can meet the weather-resistant requirement of outdoor wallboards, but also is suitable for indoor frequently-contacted wall decoration. The invention adopts the following technical scheme to realize the purposes: The high weather-resistant scratch-resistant PVC wallboard is mainly prepared by a coextrusion process through a surface layer and a bottom layer, specifically, the surface layer composition comprises 100 parts by weight of PVC resin, 20-25 parts by weight of glass fiber reinforced ABS material, 10-15 parts by weight of vinyl ester resin, 4-6 parts by weight of calcium zinc stabilizer, 3-5 parts by weight of modified nano silicon dioxide, 8-12 parts by weight of rutile titanium dioxide, 10-15 parts by weight of nano calcium carbonate, 0.3-0.5 part by weight of ethylhexyl methoxycinnamate, 0.3-0.5 part by weight of 2-hydroxy-4-methoxybenzophenone and 0.8-1.2 parts by weight of oxidized polyethylene wax, and the bottom layer composition comprises 100 parts by weight of PVC resin, 4-5 parts by weight of calcium zinc stabilizer, 6-8 parts by weight of chlorinated polyethylene, 1.5-2.5 parts by weight of processing aid, 2-4 parts by weight of titanium dioxide, 40-60 parts by weight of calcium carbonate, 5-8 parts by weight of flame retardant, 0.5-0.8 part by weight of stearic acid and 0.4-0.6 part by weight of polyethylene wax. Further, the flame retardant in the bottom layer composition is a mixture of antimony trioxide and zinc borate, and the weight ratio is 3:1. Further, the preparation method of the modified nano silicon dioxide in the surface layer composition comprises the following steps: Dispersing nano silicon dioxide in an ethanol-water mixed solution, adding hexadecyl trimethoxy silane, regulating the pH to 4.5-5.0, heating to 75-80 ℃, preserving heat for 4-6 hours, cooling to 60-70 ℃, adding methyl glucose sesquistearate, preserving heat for 2-3 hours, heating to 80-85 ℃, adding trimethyl siloxysilicate, preserving heat for 2-3 hours, washing a product with absolute ethyl alcohol, and drying at 60-70 ℃ to obtain the modified nano silicon dioxide. Furthermore, the addition amount of the hexadecyl trimethoxy silane is 3-5% of t