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CN-122008677-A - High-wear-resistance veneer and preparation process thereof

CN122008677ACN 122008677 ACN122008677 ACN 122008677ACN-122008677-A

Abstract

The invention belongs to the technical field of veneer preparation, and particularly relates to a high-wear-resistance veneer and a preparation process thereof. The high wear-resistant veneer comprises a substrate layer, a decorative layer and a wear-resistant surface layer, wherein the wear-resistant surface layer contains modified wear-resistant particles, the modified wear-resistant particles are prepared by reacting wear-resistant particles with bridging agents, and the bridging agents are synthesized by reacting 2-phenylbenzimidazole with bromophenylboric acid; the invention carries out chemical modification on the wear-resistant particles through the bridging agent, so that the wear-resistant particles are connected with the bridging agent through the boric acid ester bond and then react with the resin matrix to form chemical bonds, the modified wear-resistant particles are firmly anchored in the resin matrix, the dynamic reversible characteristic of the boric acid ester bond at the hot pressing temperature is utilized to lead the wear-resistant particles to directionally migrate towards the stress concentration area of the surface layer in the hot pressing process, a surface enriched distribution structure is formed, the wear resistance of the veneer is obviously improved, the flexible buffer layer is formed in the bottom layer area, the internal stress is effectively released, and the surface cracking is avoided.

Inventors

  • Qin kaixuan
  • HUANG QUANBIN
  • SONG ZHANMEI

Assignees

  • 山东东宇鸿翔柜橱材料有限公司

Dates

Publication Date
20260512
Application Date
20260415

Claims (10)

  1. 1. The high wear-resistant veneer is characterized in that the wear-resistant surface layer contains modified wear-resistant particles, the modified wear-resistant particles are prepared by reacting hydroxyl groups on the surfaces of the wear-resistant particles with bridging agents through boric acid ester bonds, and the bridging agents are prepared by reacting 2-phenylbenzimidazole with bromophenylboric acid.
  2. 2. A process for preparing a highly abrasion-resistant veneer according to claim 1, comprising the steps of: s1, uniformly mixing resin, modified wear-resistant particles, propylene glycol methyl ether, methyl hexahydrophthalic anhydride and 2-ethyl-4-methylimidazole, and dispersing at 1200-1500 rpm for 20-40 min by using a high-speed dispersing machine to obtain wear-resistant resin liquid; S2, taking surface layer base paper, immersing the surface layer base paper in the wear-resistant resin liquid for 30-60S, wherein the sizing amount is 115-125%, and performing three-stage drying to obtain a wear-resistant surface layer; And S3, stacking the substrate layer, the decorative layer and the wear-resistant surface layer from bottom to top, performing hot press forming, and performing stacking and curing for 24-48 hours to obtain the high wear-resistant veneer.
  3. 3. The preparation process of the high wear-resistant decorative panel according to claim 2, wherein the preparation method of the modified wear-resistant particles comprises the steps of dispersing the wear-resistant particles in absolute ethyl alcohol, performing ultrasonic treatment, adding a bridging agent, uniformly stirring, heating to 60-65 ℃ for reaction for 1-1.5 h, centrifuging after the reaction is finished, collecting the precipitate, washing with absolute ethyl alcohol, and performing vacuum drying to obtain the modified wear-resistant particles.
  4. 4. The preparation process of the high wear-resistant veneer according to claim 3, wherein the preparation method of the bridging agent is characterized in that 2-phenylbenzimidazole, bromophenylboronic acid, cuprous iodide, cesium carbonate and N, N-dimethylformamide are mixed under the atmosphere of nitrogen, stirred and uniformly mixed, reacted for 8-12 hours at 110-130 ℃, cooled to room temperature after the reaction is finished, filtered to remove insoluble substances, and the filtrate is subjected to column chromatography separation and purification, component collection, reduced pressure concentration and vacuum drying to obtain the bridging agent.
  5. 5. A process for preparing a highly abrasion-resistant veneer according to claim 3, wherein the mass ratio of the abrasion-resistant particles to the bridging agent is 100:1-5.
  6. 6. A process for preparing a highly abrasion resistant veneer according to claim 3, wherein the abrasion resistant particles are selected from any one of alumina, silica, silicon carbide or zirconia.
  7. 7. The process for preparing the high-wear-resistance decorative panel according to claim 4, wherein the molar ratio of the 2-phenylbenzimidazole to the bromophenylboric acid to the cuprous iodide to the cesium carbonate is 1:1.1-1.2:0.03-0.08:1.5-2.5, and the bromophenylboric acid is any one of 2-bromophenylboric acid, 3-bromophenylboric acid and 4-bromophenylboric acid.
  8. 8. The process for preparing the high wear-resistant veneer according to claim 2, wherein the resin is selected from any one of epoxy resin, melamine-formaldehyde resin or phenolic resin, wherein the epoxy resin is liquid bisphenol a type epoxy resin, the melamine-formaldehyde resin is water-soluble or alcohol-soluble liquid resin, and the phenolic resin is thermosetting resole liquid resin.
  9. 9. The process for preparing a high wear-resistant veneer according to claim 2, wherein in the step S1, the mass ratio of the resin, the modified wear-resistant particles, propylene glycol methyl ether, methyl hexahydrophthalic anhydride and 2-ethyl-4-methylimidazole is 100:10-30:30-50:70-90:0.8-2.0.
  10. 10. The process for preparing a high wear-resistant veneer according to claim 2, wherein in the step S2, the three-stage drying procedure is 80-90 ℃, 100-110 ℃, 120S, 120-130 ℃ and 60S; in the step S3, the hot press molding conditions are that the temperature is 160-170 ℃, the pressure is 3.0-3.5 MPa, the time is 240-300S, and the cooling mode is that the pressure is maintained and the pressure is relieved when the temperature is below 60 ℃.

Description

High-wear-resistance veneer and preparation process thereof Technical Field The invention belongs to the technical field of veneer preparation, and particularly relates to a high-wear-resistance veneer and a preparation process thereof. Background With the improvement of the living standard of people and the rapid development of the decoration industry, the veneer is used as an important material in the fields of furniture manufacturing, interior decoration, floor laying and the like, and the demand of the veneer is increased year by year. The veneer is generally composed of a substrate layer, a decorative layer and a surface protective layer, wherein the wear resistance of the surface protective layer directly determines the service life of the veneer and the durability of the decorative effect. At present, the main technical means for improving the wear resistance of the veneer is to add wear-resistant particles such as alumina, silicon dioxide, silicon carbide and the like into surface resin, wherein the adding mode of the wear-resistant particles mainly comprises a physical blending method and a surface modification method, the physical blending method is to directly mix the wear-resistant particles with the resin and then coat or impregnate the wear-resistant particles on surface base paper, the process is simple, but the problems of uneven dispersion, easy sedimentation, weak interface combination with a resin matrix and the like of the wear-resistant particles are caused, the wear-resistant particles are easy to fall off in the friction process, the surface modification method adopts a coupling agent to carry out surface treatment on the wear-resistant particles, such as silane coupling agent, and the interface combination of the particles and the resin is enhanced by forming covalent bonds, but the problems of uneven particle distribution, incapability of enriching the surface layer, low wear-resistant particles utilization rate and the like still exist. In addition, in the hot press curing process of the veneer, the resin curing shrinkage is not matched with the thermal expansion coefficient of the base material, so that internal stress is easy to generate, micro cracks appear on the surface, the appearance quality and the service life of the product are affected, under a cold and hot circulation environment, the internal stress is further aggravated, the micro cracks are expanded, finally the veneer is cracked and fails, and the technical problems to be solved in the field are solved. Therefore, the veneer with high wear resistance, excellent interface bonding strength and good cracking resistance and the preparation process thereof are developed, and the veneer has important practical significance and wide application prospect. Disclosure of Invention The invention aims to provide a high-wear-resistance veneer and a preparation process thereof, so as to solve the technical problems. In order to achieve the technical purpose, the technical scheme of the invention comprises the following steps: the high-wear-resistance veneer is characterized in that a substrate layer, a decorative layer and a wear-resistance surface layer are respectively arranged from bottom to top, the wear-resistance surface layer contains modified wear-resistance particles, the modified wear-resistance particles are prepared by reacting hydroxyl groups on the surfaces of the wear-resistance particles with bridging agents through boric acid ester bonds, and the bridging agents are prepared by reacting 2-phenylbenzimidazole with bromophenylboric acid. A preparation process of a high wear-resistant veneer comprises the following steps: s1, uniformly mixing resin, modified wear-resistant particles, propylene glycol methyl ether, methyl hexahydrophthalic anhydride and 2-ethyl-4-methylimidazole, and dispersing at 1200-1500 rpm for 20-40 min by using a high-speed dispersing machine to obtain wear-resistant resin liquid; S2, taking surface layer base paper, immersing the surface layer base paper in the wear-resistant resin liquid for 30-60S, wherein the sizing amount is 115-125%, and performing three-stage drying to obtain a wear-resistant surface layer; And S3, stacking the substrate layer, the decorative layer and the wear-resistant surface layer from bottom to top, performing hot press forming, and performing stacking and curing for 24-48 hours to obtain the high wear-resistant veneer. The preparation method of the modified wear-resistant particles comprises the steps of dispersing the wear-resistant particles in absolute ethyl alcohol, carrying out ultrasonic treatment, adding a bridging agent, stirring uniformly, heating to 60-65 ℃ for reacting for 1-1.5 h, centrifuging after the reaction is finished, collecting the precipitate, washing with absolute ethyl alcohol, and carrying out vacuum drying to obtain the modified wear-resistant particles. The preparation method of the bridging agent comprises the steps of mixing 2-phenylbenz