CN110883893A - Preparation method of functional impact-resistant veneer - Google Patents
Preparation method of functional impact-resistant veneer Download PDFInfo
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- CN110883893A CN110883893A CN201911140493.8A CN201911140493A CN110883893A CN 110883893 A CN110883893 A CN 110883893A CN 201911140493 A CN201911140493 A CN 201911140493A CN 110883893 A CN110883893 A CN 110883893A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
- B27K5/02—Staining or dyeing wood; Bleaching wood
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/02—Processes; Apparatus
- B27K3/08—Impregnating by pressure, e.g. vacuum impregnation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/34—Organic impregnating agents
- B27K3/50—Mixtures of different organic impregnating agents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/52—Impregnating agents containing mixtures of inorganic and organic compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
- B27K5/04—Combined bleaching or impregnating and drying of wood
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K2240/00—Purpose of the treatment
- B27K2240/70—Hydrophobation treatment
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
The invention discloses a preparation method of a functional impact-resistant veneer, which is characterized in that the veneer is processed through dyeing and drying, resin preparation, resin impregnation and drying balance, so that the veneer has good and lasting impact resistance and aesthetic property, and the service life of the veneer is prolonged. The method specifically comprises the steps of controlling the water content of the single board in the process, avoiding the problems of cracking, warping deformation and the like, keeping the strength of the single board, coating modified resin taking modified PAE as a main raw material on the single board, and improving the impact strength, the dimensional stability and the water resistance of the single board by combining a vacuum impregnation process; the special compound dye consisting of the amine-resistant light stabilizer and the disazo acid dye is combined with a vertical dip dyeing process, so that the dyeing effect is attractive and durable, and meanwhile, the modified resin isolates the environment, and the color fastness of the veneer is further improved.
Description
Technical Field
The invention belongs to the technical field of wood processing, and relates to a preparation method of a functional impact-resistant veneer.
Background
Along with the improvement of science and technology and the continuous improvement of living standard of people, people have higher and higher requirements on the appearance and the quality of the floor, and the high impact resistance, the comfort and the beauty become necessary performances of floor materials, while the solid wood composite floor has the characteristics of natural patterns, comfortable foot feeling, safe use and the like, and becomes a mainstream product of the current decorative floor materials due to good comprehensive performance. The solid wood composite floor is formed by laminating single boards, the single boards are generally reprocessed in order to improve the using effect of the solid wood composite floor, most commonly, the colors are enriched while natural wood grains are kept through dyeing, the visual effect is greatly improved, and the impact resistance level is improved through surface gluing.
To make the single board have good impact resistance, on one hand, the single board has good strength and dimensional stability, and on the other hand, the impact resistance is improved by gluing. However, in the processing processes of dyeing, gluing and the like, due to the change of internal water content and external conditions (such as temperature and pressure), the internal stress of the veneer can be changed or generate large difference, the problems of cracking, warping deformation and the like are easily caused, the impact strength and the dimensional stability of the veneer are obviously poor, and the production or the use of the floor are directly influenced. The gluing effect depends on the performance and quality of glue solution and whether the combination of the glue solution and the veneer is stable and firm, and the formaldehyde-containing synthetic resin is wear-resistant, waterproof and good in viscosity, and is often used as the glue solution, such as urea-formaldehyde resin and melamine-formaldehyde resin, and the use of the resin has low environmental protection level and single function.
The dyeing effect of the floor is represented by coloring uniformity and durability, and many dyed floors are easy to fade after long-term use and seriously affect the appearance, the fading of the floor is mainly caused by that ① under the irradiation of light (especially ultraviolet light), a color system of dye molecules is changed or damaged, so that the dye is decomposed to generate a color change or fading phenomenon, ② environmental factors cause fast fading, and the photo-oxidation process is accelerated by full contact of high temperature, high humidity and oxygen, so that the fading is more serious, ③ dye has poor fixation rate and is easy to separate from a plate under the action of external force.
Therefore, how to process the veneer without damaging the strength and structure of the veneer and enabling the veneer to have good and durable impact resistance and aesthetic property becomes a problem to be solved urgently.
Disclosure of Invention
Aiming at the problems, the invention provides a preparation method of a functional impact-resistant veneer, which has the excellent performances of impact resistance, gorgeous color, high color fastness, low formaldehyde release amount and the like, and also has the functions of antibiosis and anion release, and long service life.
In order to achieve the purpose, the invention adopts the following specific technical scheme:
a preparation method of a functional impact-resistant veneer comprises the following steps:
(1) taking a wood veneer as a raw material, dyeing the veneer, and drying to reduce the water content to below 10% to obtain a veneer A;
(2) dispersing hindered amine light stabilizer, antibacterial agent and tourmaline powder in environment-friendly reinforced resin to prepare modified resin;
(3) treating the veneer A with the modified resin prepared in the step (2), and preparing a veneer B by adopting a vacuum pressurization impregnation process;
(4) and (5) drying the veneer B step by step to balance the water content to 6-12%, and cutting according to the required size to obtain a functional impact-resistant veneer finished product.
Preferably, the dyeing process in the step (1) is a vertical dip dyeing process, and the process flow is as follows: dissolving the dye at 65-70 ℃, simultaneously starting an air pump, introducing air into the dye liquor, stirring the dye liquor to make the concentration of the dye liquor uniform, and dissolving the dye for 40-60 min; vertically immersing the wood veneer into a dye liquor in a bath ratio of V liquor: and (3) heating the V board = (8-15): 1 at the speed of 1-3 ℃/min, heating to 90-95 ℃ for heat preservation dyeing, and carrying out dip dyeing on the wood veneer for 4-12 h.
Preferably, the dyeing treatment in the step (1) adopts hindered amine light stabilizer and acid dye according to the mass ratio of (15-30): (100-300) and preparing the acid binary compound dye.
Further, the acid dye is a disazo acid dye, the molecular weight of the disazo acid dye is 500-600 daltons, and the molecular formula of the disazo acid dye is C24H22N4O6S2。
Preferably, the drying process in the step (1) adopts a roller dryer or a mesh belt dryer, the drying temperature is 60-100 ℃, and the drying time is 30-45 min. The moisture content of the veneer is reduced to below 10% by the process, and the warpage and deformation degree of the dried veneer is low while the drying efficiency is ensured.
Preferably, the environment-friendly reinforced resin in the step (2) is modified PAE, and the content of the modified PAE in the modified resin is 80-95 wt%. The PAE is polyamide epichlorohydrin resin, has high strength and good viscosity, and the modified PAE reduces hydrophilic groups through chemical modification on the basis of the PAE, thereby improving the water resistance. Preferably, the vacuum pressure impregnation process in the step (3) has a vacuum degree of-0.08 to-0.1 MPa, a vacuum time of 30 to 60min, a pressure of 0.5 to 1.5MPa and a pressure time of 4 to 6 h. The vacuum degree and the pressurizing pressure are too large during impregnation, the equipment development cost is increased unnecessarily, and the quality and the performance of the veneer are not improved; too short or too long vacuum time and pressurization time can affect the performance of the veneer, and indexes such as impact resistance, color fastness, negative ion release amount and the like can not meet the requirements.
Preferably, the step-by-step drying process flow in the step (4) is as follows: the moisture content of the veneer is reduced to 18% -28% through a roller dryer, then the veneer enters a vacuum drying kiln to reduce the moisture content to 8% -15%, and finally the veneer enters a curing room to balance the moisture content to 6% -12%. The veneer dried by the process has flat surface, less cracking and high comprehensive drying efficiency.
Preferably, the wood veneer is a sliced or sawn wood veneer. The tree species can be maple, oak, rubber wood, poplar, eucalyptus, etc.
The single board is processed through dyeing and drying, resin preparation, resin impregnation and drying balance, and the performance of the single board is improved. In order to enhance the impact resistance of the veneer, the change of the structure and the strength of the veneer is firstly reduced by controlling the moisture content of the veneer, the moisture content of the veneer is reduced to below 10% through drying after dyeing, the moisture content of the veneer is balanced to 6-12% through step-by-step drying in the drying balancing process, the moisture content of the veneer is controlled through the two drying processes, excessive expansion after dyeing and resin impregnation is avoided, particularly the step-by-step drying process, the moisture content is slowly reduced through three stages to be balanced, the problems of cracking, warping deformation and the like of the veneer caused by overlarge moisture content difference of different parts or large change of the moisture content of the same part in a short time in the drying process can be effectively avoided, the change of internal stress is reduced, the veneer surface is flat, and the strength of the veneer is well maintained. On the basis, the modified resin is selected as the coating glue to improve the impact strength of the veneer, the modified resin takes the modified PAE as the main raw material, does not contain formaldehyde, has less total volatile organic compounds, has good environmental protection, and has high strength, good waterproofness and viscosity, and the modified resin can be firmly combined with the veneer through the control of the process conditions of the vacuum pressurization impregnation process, so that the impact strength, the dimensional stability and the waterproofness of the veneer are effectively improved. In addition, the modified resin is added with hindered amine light stabilizer, antibacterial agent and tourmaline powder, so that the single board has the functions of light resistance, antibacterial and anion release.
① is dyed by acid binary compound dye prepared by hindered amine light stabilizer and acid dye according to proportion, wherein the acid dye is disazo acid dye with rich color and can effectively improve single board visual effect, the hindered amine light stabilizer captures alkyl free radical generated in photolysis, decomposes peroxide accumulated by photooxidation and quenches singlet oxygen which can cause photodegradation, thereby effectively preventing dye degradation, ② is dyed by vertical dip dyeing process, the dye uptake is improved by stage temperature rise and air stirring, the dye is uniformly distributed in the single board, thereby effectively improving the uniformity of color distribution and the fixation rate of the dye, and fully and durably playing the function of the dye, ③ is coated on the single board modified resin, thereby not only improving the impact strength of the single board, but also effectively isolating the environment, avoiding the influence of the change of factors such as temperature, humidity and oxygen on the dye, and the hindered amine light stabilizer is added in the dye and the modified resin, and the single board is not easy to fade by the combined action of the hindered amine light stabilizer in the dye, and the light fastness is obviously improved.
In conclusion, the invention has the following beneficial effects:
1. the change of the structure and the strength of the veneer is reduced by controlling the water content of the veneer in the process, particularly, the water content of the veneer is controlled by drying the veneer after dyeing and drying the veneer step by step after resin impregnation, so that the excessive expansion of the veneer is avoided, particularly, the water content is slowly reduced in three stages and finally balanced, the problems of cracking, warping deformation and the like of the veneer are effectively avoided, the change of internal stress is reduced, the surface of the veneer is flat, and the strength of the veneer is well maintained.
2. On the basis of ensuring the strength of the veneer, the impact strength of the veneer is improved by coating the modified resin on the veneer, the modified resin takes modified PAE as a main raw material, does not contain formaldehyde, has good environmental protection performance, high strength, good waterproofness and viscosity, and the modified resin is firmly combined with the veneer by combining a vacuum pressurization impregnation process, so that the impact strength, the dimensional stability and the waterproofness of the veneer are obviously improved. The impact strength of the treated veneer is improved by about 20 percent, and the water absorption thickness expansion rate is reduced by about 50 percent. In addition, hindered amine light stabilizer, antibacterial agent and tourmaline powder are added into the modified resin, so that the veneer has the functions of light resistance, antibiosis and anion release.
3. The specific compound dye consisting of the amine-resistant light stabilizer and the disazo acid dye is adopted, so that the visual effect of the veneer is improved, and the photodegradation of the dye is prevented; the vertical dip dyeing process is adopted for coloring, so that the distribution uniformity and fixation rate of the dye are improved, and the dyeing effect is attractive and lasting; and the modified resin is coated on the veneer to avoid the influence of the change of environmental factors such as temperature, humidity, oxygen and the like on the dye, and the hindered amine light stabilizer added in the modified resin and the hindered amine light stabilizer in the dye act together to remarkably improve the color fastness of the veneer, and the color fastness of the veneer can be kept to be more than 5 grades.
Detailed Description
The present invention will be further described with reference to the following examples.
Example 1
A preparation method of a functional impact-resistant veneer comprises the following steps:
(1) using sliced oak veneer as raw material, dyeing it, adding hindered amine light stabilizer UV-765 and disazo acid dye C24H22N4O6S2According to the following steps: 100 parts by mass of an acidic binary compound dye is prepared, the dye is dissolved at 65 ℃, an air pump is started at the same time, air is introduced into a dye solution, the dye solution is stirred to enable the concentration of the dye solution to be uniform, the dye is dissolved for 40min, an oak veneer is vertically immersed into the dye solution, and the bath ratio is V: the V board =8:1, the temperature is raised at the speed of 1 ℃/min to 90 ℃ for heat preservation and dyeing, and the oak veneer is dip-dyed for 4 h; drying the veneer by a roller dryer at the drying temperature of 60 ℃ for 30min to reduce the water content to 6% to obtain a veneer A;
(2) hindered amine light stabilizer UV-765, antibacterial agent nano silver and tourmaline powder are mixed according to the mass ratio of 10: 1: 2, dispersing the premix in the modified PAE, and ultrasonically stirring and uniformly mixing to prepare modified resin, wherein the content of the modified PAE in the modified resin is 80 wt%;
(3) treating the veneer A with the modified resin prepared in the step (2), and preparing a veneer B by adopting a vacuum pressurization impregnation process, wherein the vacuum degree is-0.08 MPa, the vacuum time is 30min, the pressurization pressure is 0.5MPa, and the pressurization time is 4 h;
(4) reducing the water content of the veneer B to 18% by a roller dryer, then reducing the water content to 8% by a vacuum drying kiln, finally balancing the water content to 6% by a curing house, and then cutting the veneer B according to the required size to obtain the functional impact-resistant veneer finished product.
Example 2
(1) Using sliced poplar veneer as raw material, dyeing it, adding hindered amine light stabilizer UV-765 and disazo acid dye C24H22N4O6S2According to the following steps of 20: 200 parts by mass of an acidic binary compound dye, dissolving the dye at 68 ℃, simultaneously starting an air pump, introducing air into a dye liquor, stirring the dye liquor to enable the concentration of the dye liquor to be uniform, dissolving the dye for 50min, vertically immersing the poplar veneer into the dye liquor longitudinally, and carrying out bath treatment on the poplar veneer in a bath ratio of V liquor: the V board =10:1, the temperature is raised at the speed of 2 ℃/min to 92 ℃, the heat preservation and dyeing are carried out, and the poplar single board is dip-dyed for 8 hours; drying the veneer by using a roller dryer at the drying temperature of 80 ℃ for 35min to reduce the water content to 8% to obtain a veneer A;
(2) hindered amine light stabilizer UV-765, antibacterial agent nano silver and tourmaline powder are mixed according to the mass ratio of 10: 1: 2, dispersing the premix in the modified PAE, and ultrasonically stirring and uniformly mixing to prepare modified resin, wherein the content of the modified PAE in the modified resin is 90 wt%;
(3) treating the veneer A with the modified resin prepared in the step (2), and preparing a veneer B by adopting a vacuum pressurization impregnation process, wherein the vacuum degree is-0.09 MPa, the vacuum time is 40min, the pressurization pressure is 1.0MPa, and the pressurization time is 5 h;
(4) reducing the water content of the veneer B to 22% by a roller dryer, then reducing the water content to 12% by a vacuum drying kiln, finally balancing the water content to 8% by a curing house, and then cutting the veneer B according to the required size to obtain the functional impact-resistant veneer finished product.
Example 3
(1) The sawed eucalyptus veneer is used as a raw material and is dyed, and the hindered amine light stabilizer UV-770 and the disazo acid dye C are added24H22N4O6S2According to the weight ratio of 30: 300 parts by mass of an acidic binary compound dye, dissolving the dye at 70 ℃, simultaneously starting an air pump, introducing air into a dye solution, stirring the dye solution to enable the concentration of the dye solution to be uniform, dissolving the dye for 60min, vertically immersing the wood veneer into the dye solution according to the longitudinal direction of the wood veneer, wherein the bath ratio is V: the V board =15:1, the temperature is raised at the speed of 3 ℃/min to 95 ℃ for heat preservation dyeing, and the eucalyptus single board is dip-dyed for 12 h; drying the single plate by a mesh belt dryer at the drying temperature of 100 ℃ for 45min to reduce the water content to 10% to obtain a single plate A;
(2) hindered amine light stabilizer UV-770, antibacterial agent nano titanium dioxide and tourmaline powder are mixed according to the mass ratio of 20: 1: 10, dispersing the premix in the modified PAE, and ultrasonically stirring and uniformly mixing to prepare modified resin, wherein the content of the modified PAE in the modified resin is 95 wt%;
(3) treating the veneer A with the modified resin prepared in the step (2), and preparing a veneer B by adopting a vacuum pressurization impregnation process, wherein the vacuum degree is-0.1 MPa, the vacuum time is 60min, the pressurization pressure is 1.5MPa, and the pressurization time is 6 h;
(4) reducing the water content of the veneer B to 28% by a roller dryer, then reducing the water content to 15% by a vacuum drying kiln, finally balancing the water content to 12% by a curing room, and then cutting the veneer B according to the required size to obtain the functional impact-resistant veneer finished product.
The functional impact-resistant veneers prepared in the embodiments 1 to 3 are subjected to performance test, and the detection items and the detection method are as follows: impact-GB/T18102-2007; water absorption thickness expansion ratio-GB/T18102-2007; color fastness to light-GB/T15104-2006. Wherein, the impact resistance and the water absorption thickness expansion rate test are compared with an untreated single plate, the light fastness test is compared with a common dyed single plate, and the specific detection results are shown in the following table:
according to the detection results, compared with an untreated veneer, the functional impact-resistant veneer prepared in the embodiments 1 to 3 has the advantages that the impact strength is improved by about 20%, the water absorption thickness expansion rate is reduced by about 50%, the impact resistance is strong, and the dimensional stability is good; the color fastness can be kept above grade 5, and the light fastness is good.
This detailed description is to be construed as illustrative only and is not limiting, since modifications will occur to those skilled in the art upon reading the preceding specification, and it is intended to be protected by the following claims.
Claims (9)
1. A preparation method of a functional impact-resistant veneer is characterized by comprising the following steps:
(1) taking a wood veneer as a raw material, dyeing the veneer, and drying to reduce the water content to below 10% to obtain a veneer A;
(2) dispersing hindered amine light stabilizer, antibacterial agent and tourmaline powder in environment-friendly reinforced resin to prepare modified resin;
(3) treating the veneer A with the modified resin prepared in the step (2), and preparing a veneer B by adopting a vacuum pressurization impregnation process;
(4) and (5) drying the veneer B step by step to balance the water content to 6-12%, and cutting according to the required size to obtain a functional impact-resistant veneer finished product.
2. The method for preparing a functional impact-resistant veneer according to claim 1, wherein the method comprises the following steps: the dyeing process in the step (1) is a vertical dip dyeing process, and the process flow is as follows: dissolving the dye at 65-70 ℃, simultaneously starting an air pump, introducing air into the dye liquor, stirring the dye liquor to make the concentration of the dye liquor uniform, and dissolving the dye for 40-60 min; vertically immersing the wood veneer into a dye liquor in a bath ratio of V liquor: and (3) heating the V board = (8-15): 1 at the speed of 1-3 ℃/min, heating to 90-95 ℃ for heat preservation dyeing, and carrying out dip dyeing on the wood veneer for 4-12 h.
3. The method for preparing a functional impact-resistant veneer according to claim 1, wherein the method comprises the following steps: the dyeing treatment in the step (1) adopts hindered amine light stabilizer and acid dye according to the mass ratio of (15-30): (100-300) and preparing the acid binary compound dye.
4. The method for preparing a functional impact-resistant veneer according to claim 3, wherein the method comprises the following steps: the acid dye is a disazo acid dye.
5. The method for preparing a functional impact-resistant veneer according to claim 1, wherein the method comprises the following steps: and (2) adopting a roller dryer or a mesh belt dryer for the drying process in the step (1), wherein the drying temperature is 60-100 ℃, and the drying time is 30-45 min.
6. The method for preparing a functional impact-resistant veneer according to claim 1, wherein the method comprises the following steps: the environment-friendly reinforced resin in the step (2) is modified PAE, and the content of the modified PAE in the modified resin is 80-95 wt%.
7. The method for preparing a functional impact-resistant veneer according to claim 1, wherein the method comprises the following steps: the vacuum pressurizing impregnation process in the step (3) has the vacuum degree of-0.08 to-0.1 MPa, the vacuum time of 30 to 60min, the pressurizing pressure of 0.5 to 1.5MPa and the pressurizing time of 4 to 6 hours.
8. The method for preparing a functional impact-resistant veneer according to claim 1, wherein the method comprises the following steps: the step-by-step drying process flow in the step (4) is as follows: the moisture content of the veneer is reduced to 18% -28% through a roller dryer, then the veneer enters a vacuum drying kiln to reduce the moisture content to 8% -15%, and finally the veneer enters a curing room to balance the moisture content to 6% -12%.
9. The method for preparing a functional impact-resistant veneer according to claim 1, wherein the method comprises the following steps: the wood veneer is a sliced or sawed wood veneer.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111716476A (en) * | 2020-06-18 | 2020-09-29 | 德华兔宝宝装饰新材股份有限公司 | Wood dyeing method |
| CN114953075A (en) * | 2022-05-09 | 2022-08-30 | 浙江升华云峰新材股份有限公司 | Preparation method of high-color-fastness recombined decorative veneer |
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| CN114953075A (en) * | 2022-05-09 | 2022-08-30 | 浙江升华云峰新材股份有限公司 | Preparation method of high-color-fastness recombined decorative veneer |
| CN114953075B (en) * | 2022-05-09 | 2023-08-08 | 浙江升华云峰新材股份有限公司 | Preparation method of high-color-fastness recombined decorative veneer |
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Application publication date: 20200317 |