CN110509388A - A kind of high-strength weather-proof colour plate preparation method based on ramie core - Google Patents

A kind of high-strength weather-proof colour plate preparation method based on ramie core Download PDF

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Publication number
CN110509388A
CN110509388A CN201910893662.9A CN201910893662A CN110509388A CN 110509388 A CN110509388 A CN 110509388A CN 201910893662 A CN201910893662 A CN 201910893662A CN 110509388 A CN110509388 A CN 110509388A
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China
Prior art keywords
epoxy resin
ramie core
ramie
method based
water
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CN201910893662.9A
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Chinese (zh)
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CN110509388B (en
Inventor
吴庆定
宋喜艳
霍皓灵
唐小杰
杜沐青
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Central South University of Forestry and Technology
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Central South University of Forestry and Technology
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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
    • 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
    • B27K3/16—Inorganic impregnating agents
    • B27K3/20—Compounds of alkali metals or ammonium
    • 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
    • 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
    • B27K9/00—Chemical or physical treatment of reed, straw, or similar material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N1/00—Pretreatment of moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N1/00—Pretreatment of moulding material
    • B27N1/02—Mixing the material with binding agent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/02—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/08—Moulding or pressing

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

The high-strength weather-proof colour plate preparation method based on ramie core that the invention discloses a kind of, it includes that ramie core pretreatment, depth monochrome dyeing, colour mixture sizing, five warm-pressing formation, post-processing step inventions are easy to implement, it is suitble to large-scale production, it is a kind of effective way for realizing the crudefiber crops residue high level clean utilization such as ramie core, it is widely used using autochromatic plate material prepared by the present invention is beautiful in colour, intensity is high, wear-resistant, good weatherability.

Description

A kind of high-strength weather-proof colour plate preparation method based on ramie core
Technical field
The invention belongs to new material and green manufacturing field, in particular to a kind of high-strength weather-proof autochromatic plate based on ramie core Material preparation method.
Background technique
The ramie of title with " China is careless ", extensively, fiber has Young's modulus height, the degree of polymerization compared to cotton fiber for plantation Greatly, the features such as single fiber strength is big, the component and performance for gathering in residue boon are no less than common xylophyta.Unfortunately wide Large village, ramie core or directly the burning material of burn-up or pig feed of cooking, boil as farmers' family, thus the economic value of ramie core Sufficiently efficient utilize is not obtained.
The cheap woody, liana of high level clean utilization, herbaceous plant and its harvesting/industrial wood waste preparation high performance-price ratio are wooden Compound (function) material has become one of significant concern point of new material developer.Ramie core can be used for preparing high performance-price ratio wood Compound (function) plate of matter.
By patent retrieval, inquire below in connection with the art solutions being closer to.
Patent 1: number of patent application CN201711391972.8, a kind of preparation of ramee/epoxy resin composite material Methods and applications.Ramee is cut into section in preparation method, is placed in mold cavity, is then placed in mechanical vibration generator system, if Surely the power vibrated is 1.2~1.8KW, the frequency of vibration is 300~600HZ, amplitude is 1~5mm, the time of vibration be 10~ 30min；By liquid-state epoxy resin with curing agent, silane coupling agent with mass ratio (1~1.2): 1: (0.01~0.066) mixes It is even, obtain epoxy resin adhesive liquid；Mold cavity is taken out from mechanical vibration generator system, then epoxy resin adhesive liquid is injected in mold cavity and is impregnated with Ramee；The ramee elder generation room temperature of impregnation is dried, repressurization molding, final curing is to get ramee/epoxy Resin composite materials.The patent adds silane coupling agent, and what is utilized is ramie harl, and economic cost is high.
Patent 2: application number CN201810675026.4, it is multiple that a kind of supercritical CO auxiliary prepares ramee/epoxy resin The method of condensation material in ethanol by ramee dispersion is put into supercritical CO processing unit, in 60~80 DEG C, 20 later 30~60min is handled under~30Mpa；After treatment, which is unloaded, is depressed into normal pressure, take out ramee, by its 200 in N atmosphere~ 40~60min is heat-treated at 300 DEG C；Ramee after heat treatment is reentered into supercritical CO processing unit, simultaneously will SiC particulate, nano silica, curing agent are added in epoxy resin and mix, and the material after mixing is poured into supercritical CO processing Ramee is impregnated in device, and 30~60min is handled at 40~60 DEG C, 20~30Mpa；After treatment, which is unloaded, to be depressed into often Pressure takes out ramee, and room temperature is dried, and is press-formed, and solidifies to get ramee/epoxy resin composite material.The patent exists The processing of supercritical CO processing unit, what is utilized is ramie harl, and economic cost is high.
" Hunan Agricultural College's journal " the 89th phase in 1989, the development of ramie core fiberboard, process flow be raw material cutting, Screening, defibrator process, fine grinding, the thick slurry of hot-mill method preparation, refining processing, molding, hot pressing, cutting edge, ramie core need to pass through defibrator process, fine grinding, At immersion two hours, 18 degrees Celsius of water temperature, thickness swelling 8%.All there is environmental pollution from technique to product and ask in the patent Topic, and product ramie core fiberboard is conventional fibre plate, conventional fibre plate will be substituted gradually by high-intensitive plate.
The contents of the present invention, those of ordinary skill in the art are not disclosed in art solutions disclosed above and paper Technical inspiration of the invention cannot be obtained by be combineding with each other for above technical scheme.
Summary of the invention
It is an object of the invention to open up a kind of ramie core high level clean utilization new way, provide a kind of beautiful in colour, strong High, wear-resistant, good weatherability colored plate preparation method is spent, allows people to enjoy noble inexpensive high-grade woodwork and accompanies Good life.
A kind of high-strength weather-proof colour plate preparation method based on ramie core, comprising the following steps:
Step 1: ramie core pretreatment: in concentration being 2%~5% by the ramie core of drying under room temperature environment Washing, drying after 10~12h of immersion in NaOH solution；
Step 2: depth monochrome dyeing: handling 45~60min to monochrome dyeing is implemented through the pretreated ramie core of step 1, Wherein, dye liquor includes water soluble dyestuffs 2%~4%, salt 2%~3%, surplus soft water, the aqueous dye by weight percentage Material is at least one of seven kinds of monogenetic dyes of red, orange, yellow, green, blue, blue, purple；Above-mentioned monochrome dyeing processing is in temperature 50~70 DEG C, vacuum degree be 0.05~0.08MPa vacuum environment under carry out；The depth monochrome dyeing is substantially by step 1 through NaOH Solution opens pit and from outward appearance to inner essence implements the process of dyeing with the ramie core after drying through washing after sufficiently impregnating；
Step 3: colour mixture sizing: at least one ramie core through step 2 Inner dyeing being carried out to mix bundling, every bundle weight It is that operating unit infiltrates aqueous epoxide-resin glue with bundle for 3~5kg；
The aqueous epoxy resins glue is that 1:1 is prepared Epoxy Resin Hybrid Emulsion in real time by volume with water soluble solid agent It forms, wherein Epoxy Resin Hybrid Emulsion is epoxy resin latex and epoxy resin-organic nano imvite cladding lotion Uniform mixed emulsion, the volume ratio of epoxy resin and epoxy resin latex is 1:9~1:3 in the Epoxy Resin Hybrid Emulsion, The content of organic nano imvite is 4%~6wt% in Epoxy Resin Hybrid Emulsion；
Step 4: warm-pressing formation: the ramie core being glued through step 3 colour mixture being paved in time real in the shaping dies of four sides top It applies warm-pressing formation and colored slab is made, forming pressure is 200~300MPa, and forming temperature is 80~120 DEG C, the heat-insulation pressure keeping time For 30~60min；
Step 5: post-processing: carrying out trimming, sanding, waxing processing to colored slab, final to obtain the height based on ramie core Intensity weather resisting colorful plate.
Further, the moisture content of the ramie core pretreatment front and back in the step 1 is 12%~15%.
Further, the soft water in the step 2 is natural soft water, to be free of or being lower than containing solubility calcium, magnesium compound River, river water or the water in fresh water lake of 550mg/L.
Further, the four sides top shaping dies in the step 4 is to utilize in six faces of mold two parallel four The three-dimensional two-way shaping dies of warm-pressing formation is implemented in a face, and the forming pressure is 250MPa, and forming temperature is 100 DEG C, heat preservation Dwell time is 55min.
Further, in the step 3 epoxy resin latex be epoxy resin, maleic anhydride, polyethylene glycol in molar ratio The emulsion that 2:2:1~3:3:1 is prepared.
Further, organic nano imvite is using Cetyltrimethylammonium bromide as intercalator in the step 3 Organic modification acquisition is carried out to inorganic montmorillonite.
Further, water soluble solid agent includes that triethylene tetramine, epoxy resin, allyl glycidyl are sweet in the step 3 Oily ether and diluent, triethylene tetramine, epoxy resin, allyl glycidyl ether in molar ratio 2:1:2~5:2:4 prepare and At diluent is acetone and distilled water.
Beneficial effects of the present invention:
1. this case is using ramie core, Inner dyeing preprocessed as substrate, colour mixture sizing, warm-pressing formation and post-processing were waited Journey, integrated application powder metallurgy and the cross disciplines material forming such as powder technology, composite material and engineering, Wood Science and Technology Theory has innovated the forming technique and method of composite wooden material.
2. ramie core is sufficiently impregnated through NaOH solution in the present invention, from outward appearance to inner essence real to ramie core after ramie core opening pit Apply dyeing, it is ensured that the homogenieity and completeness of dyeing ensure that a certain extent not fugitive color.
3. the ingredient of aqueous epoxy resins glue of the invention is environmentally friendly preparation, problem of environmental pollution is not present；Preparation side Method is simple, and the epoxy group of epoxy resin is reacted with the group of other additives, realizes bonding, improves the durable of material Property；Acetone and water remove more convenient as diluent from system, are conducive to reduce energy consumption, take away the heat that generates in reaction, It is mildly carried out convenient for reacting balance.
4. the present invention using four sides top shaping dies to colour mixture sizing after ramie core implement four faces squeeze temperature and pressure at Shape overcomes the obvious of the internal flaw that conventional artificial's plate only causes slab unavoidable by upper and lower both direction extrusion molding Drawback, manufactured colour slab are squeezed through four faces, compared to the extruding of two faces, no internal flaw, and it is beautiful in colour, intensity is high, Wear-resistant, good weatherability.
5. comparing number of patent application CN201711391972.8, pre- place is dried to ramie and dyed to the present patent application Reason can achieve same bonding force under hygrometric state, weatherability without addition coupling agent in colour mixture Process of Applying Glue；Vacuum dyeing, energy Aqueous fuel is set to reach good dispersibility；It selects ramie xylem, that is, ramie waste material as raw material in the application, utilizes Industrial wood waste prepares high performance-price ratio wood composite (function) material, is of great importance to energy-saving and emission-reduction.
6. comparing number of patent application CN201810675026.4, the present patent application is passed through to aqueous epoxy resins glue formula Accurate control, to the temperature of warm-pressing formation process, pressure, the accurate assurance of time, dries without room temperature, directly carries out colour mixture and applies Glue reaches equivalent effect；It selects ramie xylem, that is, ramie waste material as raw material in the application, utilizes industrial wood waste system Standby high performance-price ratio wood composite (function) material, is of great importance to energy-saving and emission-reduction.
7. " Hunan Agricultural College's journal " the 89th phase in 1989 of comparison, the development of ramie core fiberboard, which increase technique streams Journey and cost joined paraffin, phenolic resin, aluminum sulfate, dilute sulfuric acid in washing process, and molding procedure need to add Lauxite Glue, there is problem of environmental pollution in the comparison present invention, and product ramie core fiberboard is conventional fibre plate from technique to product, close Spend that low, intensity is low, expansion rate of water absorption is high, weatherability is poor, present invention process is brief and environmental protection, extrudate density, intensity, weatherability phase To the fiberboard of documents preparation, 1 times or more is above on functional parameter.
8. the material density of high-strength weather-proof colour plate of the invention is up to 1.2~1.3g/cm3, water absorption rate≤2.0% And water suction volume expansion rate is 0.0%, static bending strength >=100MPa, hardness >=8000N/mm2, abrasivity≤0.05g/100r, Have the characteristics that weatherability height, high density, high intensity, expansion rate of water absorption are low and be better than conventional sheet, is suitable for all kinds of high-grade families Occupy the manufacture of product and craftwork.
Specific embodiment
In order to make those skilled in the art more fully understand technical solution of the present invention, below with reference to specific example to this hair It is bright to be described in detail, the description of this part be only it is exemplary and explanatory, should not have to protection scope of the present invention any Restriction effect.
The following are specific examples
Embodiment 1
A kind of high-strength weather-proof colour plate preparation method based on ramie core, comprising the following steps:
Step 1: ramie core pretreatment: under room temperature environment, the NaOH solution for being 2% in concentration by the ramie core of drying It washes, dry after middle immersion 10h；The moisture content of ramie core pretreatment front and back in the step 1 is 12%~15%.
Step 2: depth monochrome dyeing: handling 45min to monochrome dyeing is implemented through the pretreated ramie core of step 1, wherein Dye liquor includes water soluble dyestuffs 2%, salt 2%, surplus soft water by weight percentage, the water soluble dyestuffs be it is red, orange, Yellow, green, green, blue, purple seven kinds of monogenetic dyes；Above-mentioned monochrome dyeing processing is in temperature 50 C, the vacuum ring that vacuum degree is 0.05MPa It is carried out under border；The depth monochrome dyeing be substantially step 1 is opened after NaOH solution is sufficiently impregnated pit and through washing with Ramie core after drying from outward appearance to inner essence implements the process of dyeing；Soft water in the step 2 is natural soft water, containing solubility calcium, Magnesium compound is lower than the river of 550mg/L.
Step 3: colour mixture sizing: the ramie core of 7 kinds of different colours through step 2 Inner dyeing being subjected to bundling respectively, is beaten The ramie core of 7 kinds of pure colors is tied, every bundle weight is 3kg, is that operating unit infiltrates aqueous epoxide-resin glue with bundle；The water-base epoxy Resin glue is that 1:1 is formulated Epoxy Resin Hybrid Emulsion in real time by volume with water soluble solid agent, and wherein epoxy resin is multiple Close the uniform mixed emulsion that lotion is epoxy resin latex and epoxy resin-organic nano imvite cladding lotion, the ring The volume ratio of epoxy resin and epoxy resin latex is 1:9 in oxygen resin compounded lotion, organic in Epoxy Resin Hybrid Emulsion to receive The mass content of rice montmorillonite is 4%；Epoxy resin latex is epoxy resin in the step 3, maleic anhydride, polyethylene glycol are pressed The emulsion that molar ratio 2:2:1 is prepared.In the step 3 organic nano imvite be using Cetyltrimethylammonium bromide as Intercalator carries out organic modification acquisition to inorganic montmorillonite.Water soluble solid agent includes triethylene tetramine, ring in the step 3 Oxygen resin, allyl glycidyl ether and diluent, triethylene tetramine, epoxy resin, allyl glycidyl ether are in molar ratio 2:1:2 is formulated, and diluent is acetone and distilled water.
Step 4: warm-pressing formation: the ramie core being glued through step 3 colour mixture being paved in time real in the shaping dies of four sides top It applies warm-pressing formation and colored slab, forming pressure 200Mpa is made, forming temperature is 80 DEG C, and the heat-insulation pressure keeping time is 30min；Institute The four sides top shaping dies stated in step 4 is to implement the three of warm-pressing formation using four faces two parallel in six faces of mold Tie up two-way shaping dies.
Step 5: post-processing: carrying out trimming, sanding, waxing processing to colored slab, final to obtain the height based on ramie core Intensity weather resisting colorful plate.
Above-described epoxy resin is standard Bisphenol-A epoxy resin E-51.
The high-strength weather-proof colour plate of 7 kinds of pure colors of one kind that the present embodiment is prepared carries out test analysis: density is high Up to 1.21g/cm3, water absorption rate 1.1%, water suction volume expansion rate be 0.0%, static bending strength 101MPa, hardness 9100N/ mm2, abrasivity 0.05g/100r.
Embodiment 2
A kind of high-strength weather-proof colour plate preparation method based on ramie core, comprising the following steps:
Step 1: ramie core pretreatment: under room temperature environment, the NaOH solution for being 4% in concentration by the ramie core of drying It washes, dry after middle immersion 11h；The moisture content of ramie core pretreatment front and back in the step 1 is 13%~14%.
Step 2: depth monochrome dyeing: handling 55min to monochrome dyeing is implemented through the pretreated ramie core of step 1, wherein Dye liquor includes water soluble dyestuffs 3%, salt 2.8%, surplus soft water by weight percentage, the water soluble dyestuffs be respectively orange, it is yellow, Green three kinds of monogenetic dyes；Above-mentioned monochrome dyeing processing carries out under temperature 60 C, the vacuum environment that vacuum degree is 0.06MPa；Institute Stating depth monochrome dyeing substantially is that step 1 is opened to pit after NaOH solution is sufficiently impregnated and is washed and the ramie after drying Bone from outward appearance to inner essence implements the process of dyeing；Soft water in the step 2 is natural soft water, is lower than containing solubility calcium, magnesium compound The river water of 500mg/L.
Step 3: colour mixture sizing: 3 kinds of color ramie cores through step 2 Inner dyeing being carried out to mix bundling, every bundle weight For 4kg, a kind of plate of bundling orange, yellow and green three color is that operating unit infiltrates aqueous epoxide-resin glue with bundle；The aqueous ring Oxygen resin glue is that 1:1 is formulated Epoxy Resin Hybrid Emulsion in real time by volume with water soluble solid agent, wherein epoxy resin Multiple emulsion is the uniform mixed emulsion of epoxy resin latex and epoxy resin-organic nano imvite cladding lotion, described The volume ratio of epoxy resin and epoxy resin latex is 1:6 in Epoxy Resin Hybrid Emulsion, organic in Epoxy Resin Hybrid Emulsion The content of nano montmorillonite is 5wt%；Epoxy resin latex is epoxy resin in the step 3, maleic anhydride, polyethylene glycol are pressed The emulsion that molar ratio 2.5:2.5:1 is prepared.Organic nano imvite is by Cetyltrimethylammonium bromide in the step 3 Organic modification acquisition is carried out to inorganic montmorillonite as intercalator.Water soluble solid agent includes triethylene four in the step 3 Amine, epoxy resin, allyl glycidyl ether and diluent, triethylene tetramine, epoxy resin, allyl glycidyl ether massage You are formulated than 2.3:1:2, and diluent is acetone and distilled water.
Step 4: warm-pressing formation: the ramie core being glued through step 3 colour mixture being paved in time real in the shaping dies of four sides top It applies warm-pressing formation and is made colored slab, the forming pressure is 250MPa, and forming temperature is 100 DEG C, and the heat-insulation pressure keeping time is 55min；Four sides top shaping dies in the step 4 is to implement temperature and pressure using four faces two parallel in six faces of mold The three-dimensional two-way shaping dies of forming,
Step 5: post-processing: carrying out trimming, sanding, waxing processing to colored slab, final to obtain the height based on ramie core Intensity weather resisting colorful plate.
Above-described epoxy resin is standard Bisphenol-A epoxy resin E-51.
The high-strength weather-proof colour plate that the present embodiment is prepared carries out test analysis: density 1.26g/cm3, water suction Rate is 1.4%, water suction volume expansion rate is 0.0%, static bending strength 103MPa, hardness 9800N/mm2, abrasivity be 0.04g/100r。
Embodiment 3
A kind of high-strength weather-proof colour plate preparation method based on ramie core, comprising the following steps:
Step 1: ramie core pretreatment: under room temperature environment, the ramie core of drying is molten for 4.5% NaOH in concentration Washing, drying after immersion 11.5h in liquid；The moisture content of ramie core pretreatment front and back in the step 1 is 14%.
Step 2: depth monochrome dyeing: handling 58min to monochrome dyeing is implemented through the pretreated ramie core of step 1, wherein Dye liquor includes water soluble dyestuffs 3.5%, salt 2.6%, surplus soft water by weight percentage, the water soluble dyestuffs are respectively red, Orange, yellow, green, green, blue, purple water soluble dyestuffs；Above-mentioned monochrome dyeing processing is in 58 DEG C of temperature, the vacuum ring that vacuum degree is 0.07MPa It is carried out under border；The depth monochrome dyeing be substantially step 1 is opened after NaOH solution is sufficiently impregnated pit and through washing with Ramie core after drying from outward appearance to inner essence implements the process of dyeing；Soft water in the step 2 is natural soft water, containing solubility calcium, The water in fresh water lake of the magnesium compound lower than 550mg/L.
Step 3: colour mixture sizing: 7 kinds of color ramie cores through step 2 Inner dyeing being carried out mixing bundling, bundling is at one The colored ramie core with 7 kinds of colors is tied, every bundle weight is 4.5kg, is that operating unit infiltrates aqueous epoxide-resin glue with bundle；Institute Stating aqueous epoxy resins glue, 1:1 is formulated in real time by volume with water soluble solid agent for Epoxy Resin Hybrid Emulsion, wherein Epoxy Resin Hybrid Emulsion mixes cream with the uniform of epoxy resin-organic nano imvite cladding lotion for epoxy resin latex Liquid, the volume ratio of epoxy resin and epoxy resin latex is 1:7, Epoxy Resin Hybrid Emulsion in the Epoxy Resin Hybrid Emulsion The content of middle organic nano imvite is 5.2wt%；Epoxy resin latex is epoxy resin, maleic anhydride, gathers in the step 3 The ethylene glycol emulsion that 2.8:2.8:1 is prepared in molar ratio.Water soluble solid agent includes triethylene tetramine, ring in the step 3 Oxygen resin, allyl glycidyl ether and diluent, triethylene tetramine, epoxy resin, allyl glycidyl ether are in molar ratio 2.8:1:2 is formulated, and diluent is acetone and distilled water.
Step 4: warm-pressing formation: the ramie core being glued through step 3 colour mixture being paved in time real in the shaping dies of four sides top It applies warm-pressing formation and colored slab, forming pressure 280MPa is made, forming temperature is 110 DEG C, and the heat-insulation pressure keeping time is 48min； Four sides top shaping dies in the step 4 is to implement warm-pressing formation using four faces two parallel in six faces of mold Three-dimensional two-way shaping dies.
Step 5: post-processing: carrying out trimming, sanding, waxing processing to colored slab, final to obtain the height based on ramie core Intensity weather resisting colorful plate.
Above-described epoxy resin is standard Bisphenol-A epoxy resin E-51.
The seven color colour table material of a kind of high-strength weather-proof that the present embodiment is prepared carries out test analysis: density 1.28g/ cm3, water absorption rate 1.08%, water suction volume expansion rate be 0.0%, static bending strength 105MPa, hardness 9200N/mm2, abrasion Property is 0.041g/100r.
Embodiment 4
A kind of high-strength weather-proof colour plate preparation method based on ramie core, comprising the following steps:
Step 1: ramie core pretreatment: under room temperature environment, the NaOH solution for being 5% in concentration by the ramie core of drying It washes, dry after middle immersion 12h；The moisture content of ramie core pretreatment front and back in the step 1 is 12%~15%.
Step 2: depth monochrome dyeing: handling 60min to monochrome dyeing is implemented through the pretreated ramie core of step 1, wherein Dye liquor includes water soluble dyestuffs 4%, salt 3%, surplus soft water by weight percentage, and the water soluble dyestuffs are yellow and green two kinds of lists Color dyestuff mixes, and is a kind of yellow-green dye；Above-mentioned monochrome dyeing processing is 0.08MPa's in temperature 70 C, vacuum degree It is carried out under vacuum environment；The depth monochrome dyeing is substantially that step 1 is opened to pit after NaOH solution is sufficiently impregnated and is passed through The process of dyeing is from outward appearance to inner essence implemented in washing with the ramie core after drying；Soft water in the step 2 is natural soft water, containing solvable Property calcium, magnesium compound be lower than 500mg/L river.
Step 3: colour mixture sizing: carrying out bundling for the yellow green ramie core through step 2 Inner dyeing, and every bundle weight is 5kg, It is that operating unit infiltrates aqueous epoxide-resin glue with bundle；The aqueous epoxy resins glue is Epoxy Resin Hybrid Emulsion and water solubility 1:1 is formulated curing agent in real time by volume, and wherein Epoxy Resin Hybrid Emulsion is that epoxy resin latex has with epoxy resin- The uniform mixed emulsion of the cladding lotion of machine nano montmorillonite, epoxy resin and epoxy resin in the Epoxy Resin Hybrid Emulsion The volume ratio of lotion is 1:3, and the content of organic nano imvite is 6wt% in Epoxy Resin Hybrid Emulsion；Step 3 middle ring Oxygen resin emulsion is epoxy resin, maleic anhydride, the polyethylene glycol emulsion that 3:3:1 is prepared in molar ratio.Have in the step 3 Machine nano montmorillonite is to carry out organic modification acquisition to inorganic montmorillonite using Cetyltrimethylammonium bromide as intercalator. Water soluble solid agent includes triethylene tetramine, epoxy resin, allyl glycidyl ether and diluent, three second in the step 3 5:2:4 is formulated in molar ratio for alkene tetramine, epoxy resin, allyl glycidyl ether, and diluent is that acetone and distilled water are pressed Quality proportioning 1:1 is made into, and triethylene tetramine and diluent are made by by quality proportioning 1:2.
Step 4: warm-pressing formation: the ramie core being glued through step 3 colour mixture being paved in time real in the shaping dies of four sides top It applies warm-pressing formation and colored slab is made, forming pressure 300MPa, 120 DEG C of forming temperature, the heat-insulation pressure keeping time is 60min；Institute The four sides top shaping dies stated in step 4 is to implement the three of warm-pressing formation using four faces two parallel in six faces of mold Tie up two-way shaping dies.
Step 5: post-processing: carrying out trimming, sanding, waxing processing to colored slab, final to obtain the height based on ramie core Intensity weather resisting colorful plate.
Above-described epoxy resin is standard Bisphenol-A epoxy resin E-51.
The high-strength weather-proof yellow green plate that the present embodiment is prepared carries out test analysis: density 1.29g/cm3, inhale Water rate is 1.6%, water suction volume expansion rate is 0.0%, static bending strength 102MPa, hardness 9600N/mm2, abrasivity be 0.045g/100r。
Reference examples 1
The difference from embodiment 1 is that: in step (2), under 50 DEG C of vacuum environments, 0.1MPa；Other same embodiments 1。
The colored panel density of this reference examples preparation is 1.0g/cm3, water absorption rate 2.4%, water suction volume expansion rate are 0.9%, static bending strength 90MPa, hardness 7800N/mm2, abrasivity 0.06g/100r.
Reference examples 2
The difference from embodiment 1 is that: in step (3), the ramie core that colour mixture is glued warm-pressing formation: is paved on four in time Implement warm-pressing formation in the shaping dies of face top and colored slab, forming pressure 180MPa is made, forming temperature is 60 DEG C, and heat preservation is protected The pressure time is 55min.It is other with embodiment 1.
The colored panel density of this reference examples preparation is 1.2g/cm3, water absorption rate 2.8%, water suction volume expansion rate be 1.1%, static bending strength 70MPa, hardness 7900N/mm2, abrasivity 0.06g/100r.
Table 1, embodiment and reference examples colour plate performance parameter table
The performance data of comparing embodiment 1~4 and the colored plate of 1~2 gained of reference examples, finds the property of Examples 1 to 4 Reference examples 1~2 can be substantially better than.Color performance obtained by Examples 1 to 4 fully meets material requirements, and obtained by reference examples 1~2 The performance of colored plate is then under critical value.Hardness, static bending strength, water suction volume expansion rate are not able to satisfy certain applications and want It asks.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row His property includes, so that the process, method, article or equipment for including a series of elements not only includes those elements, and And further include other elements that are not explicitly listed, or further include for this process, method, article or equipment institute it is intrinsic Element.
Used herein a specific example illustrates the principle and implementation of the invention, the explanation of above example It is merely used to help understand method and its core concept of the invention.The above is only a preferred embodiment of the present invention, it answers When pointing out due to the finiteness of literal expression, and objectively there is unlimited specific structure, for the common skill of the art For art personnel, without departing from the principle of the present invention, several improvement, retouching or variation can also be made, can also incited somebody to action Above-mentioned technical characteristic is combined in the right way；These improve retouching, variation or combination, or the not improved structure by invention Think and technical solution directly applies to other occasions, is regarded as protection scope of the present invention.

Claims (7)

1. a kind of high-strength weather-proof colour plate preparation method based on ramie core, which comprises the following steps:
Step 1: ramie core pretreatment: under room temperature environment, the ramie core of drying is molten for 2%~5% NaOH in concentration Washing, drying after 10~12h of immersion in liquid；
Step 2: depth monochrome dyeing: handling 45~60min to monochrome dyeing is implemented through the pretreated ramie core of step 1, wherein Dye liquor includes water soluble dyestuffs 2%~4%, salt 2%~3%, surplus soft water by weight percentage, and the water soluble dyestuffs are At least one of seven kinds of monogenetic dyes of red, orange, yellow, green, blue, blue, purple；Above-mentioned monochrome dyeing is handled in 50~70 DEG C of temperature, very It is carried out under the vacuum environment that reciprocal of duty cycle is 0.05~0.08MPa；The depth monochrome dyeing is substantially to fill step 1 through NaOH solution Pit is opened after sub-dip bubble and from outward appearance to inner essence implements the process of dyeing with the ramie core after drying through washing；
Step 3: colour mixture sizing: at least one ramie core through step 2 Inner dyeing being carried out to mix bundling, every bundle weight is 3 ~5kg is that operating unit infiltrates aqueous epoxide-resin glue with bundle；
The aqueous epoxy resins glue be Epoxy Resin Hybrid Emulsion and water soluble solid agent by volume 1:1 prepare in real time and At wherein Epoxy Resin Hybrid Emulsion is the equal of epoxy resin latex and epoxy resin-organic nano imvite cladding lotion Even mixed emulsion, the volume ratio of epoxy resin and epoxy resin latex is 1:9~1:3, ring in the Epoxy Resin Hybrid Emulsion The content of organic nano imvite is 4%~6wt% in oxygen resin compounded lotion；
Step 4: warm-pressing formation: the ramie core being glued through step 3 colour mixture is paved in time in the shaping dies of four sides top and implements temperature Colored slab is made in pressing formation, and forming pressure is 200~300MPa, and forming temperature is 80~120 DEG C, and the heat-insulation pressure keeping time is 30 ~60min；
Step 5: post-processing: carrying out trimming, sanding, waxing processing to colored slab, final to obtain the high intensity based on ramie core Weather resisting colorful plate.
2. a kind of high-strength weather-proof colour plate preparation method based on ramie core according to claim 1, feature exist In the moisture content of the ramie core pretreatment front and back in the step 1 is 12%~15%.
3. a kind of high-strength weather-proof colour plate preparation method based on ramie core according to claim 1, feature exist In, soft water in the step 2 is natural soft water, for be free of or river containing solubility calcium, magnesium compound lower than 550mg/L, River water or the water in fresh water lake.
4. a kind of high-strength weather-proof colour plate preparation method based on ramie core according to claim 1, feature exist In, four sides in the step 4 top shaping dies be implemented using four faces two parallel in six faces of mold temperature and pressure at The three-dimensional two-way shaping dies of shape, the forming pressure are 250MPa, and forming temperature is 100 DEG C, and the heat-insulation pressure keeping time is 55min。
5. a kind of high-strength weather-proof colour plate preparation method based on ramie core according to claim 1, feature exist In epoxy resin latex is epoxy resin in the step 3, maleic anhydride, 2:2:1~3:3:1 matches polyethylene glycol in molar ratio The emulsion of system.
6. a kind of high-strength weather-proof colour plate preparation method based on ramie core according to claim 1, feature exist In, in the step 3 organic nano imvite be using Cetyltrimethylammonium bromide as intercalator to inorganic montmorillonite into Row organic modification obtains.
7. a kind of high-strength weather-proof colour plate preparation method based on ramie core according to claim 1, feature exist In, water soluble solid agent includes triethylene tetramine, epoxy resin, allyl glycidyl ether and diluent in the step 3, and three 2:1:2~5:2:4 is formulated in molar ratio for ethylene tetramine, epoxy resin, allyl glycidyl ether, diluent be acetone and Distilled water.
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CN102505502A (en) * 2011-09-23 2012-06-20 安徽工程大学 Short-process dyeing pretreatment technology for ramee
CN203171764U (en) * 2013-01-19 2013-09-04 西北农林科技大学 Straw regrouping square material
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