CN103433984A - Producing method of heat-resisting full eucalyptus laminated veneer - Google Patents
Producing method of heat-resisting full eucalyptus laminated veneer Download PDFInfo
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- CN103433984A CN103433984A CN2013103533323A CN201310353332A CN103433984A CN 103433984 A CN103433984 A CN 103433984A CN 2013103533323 A CN2013103533323 A CN 2013103533323A CN 201310353332 A CN201310353332 A CN 201310353332A CN 103433984 A CN103433984 A CN 103433984A
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 244000166124 Eucalyptus globulus Species 0.000 title claims abstract 7
- 230000036541 health Effects 0.000 claims abstract description 43
- 238000007731 hot pressing Methods 0.000 claims abstract description 40
- 238000003825 pressing Methods 0.000 claims abstract description 29
- 230000005855 radiation Effects 0.000 claims abstract description 27
- 229920000877 Melamine resin Polymers 0.000 claims abstract description 21
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims abstract description 21
- 238000004026 adhesive bonding Methods 0.000 claims abstract 2
- 238000009423 ventilation Methods 0.000 claims abstract 2
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 115
- 238000006243 chemical reaction Methods 0.000 claims description 24
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 21
- 239000004202 carbamide Substances 0.000 claims description 21
- 238000005034 decoration Methods 0.000 claims description 19
- 238000003475 lamination Methods 0.000 claims description 19
- 239000002023 wood Substances 0.000 claims description 18
- 239000000853 adhesive Substances 0.000 claims description 17
- 230000001070 adhesive effect Effects 0.000 claims description 17
- 238000004519 manufacturing process Methods 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 9
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 claims description 8
- 230000001143 conditioned effect Effects 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 6
- 238000010792 warming Methods 0.000 claims description 6
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 3
- 239000002585 base Substances 0.000 claims description 3
- 239000012295 chemical reaction liquid Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract 5
- 239000000758 substrate Substances 0.000 abstract 1
- 241000219927 Eucalyptus Species 0.000 description 42
- 235000019256 formaldehyde Nutrition 0.000 description 36
- 238000005498 polishing Methods 0.000 description 14
- 238000001816 cooling Methods 0.000 description 13
- 229920000642 polymer Polymers 0.000 description 13
- 229920005989 resin Polymers 0.000 description 9
- 239000011347 resin Substances 0.000 description 9
- 239000000047 product Substances 0.000 description 7
- 239000004576 sand Substances 0.000 description 7
- 239000000178 monomer Substances 0.000 description 5
- 229920001807 Urea-formaldehyde Polymers 0.000 description 4
- GZCGUPFRVQAUEE-SLPGGIOYSA-N aldehydo-D-glucose Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O GZCGUPFRVQAUEE-SLPGGIOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000006116 polymerization reaction Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 150000001299 aldehydes Chemical class 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000006068 polycondensation reaction Methods 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 244000082204 Phyllostachys viridis Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006482 condensation reaction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 230000000474 nursing effect Effects 0.000 description 1
- 239000011120 plywood Substances 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/133—Renewable energy sources, e.g. sunlight
Landscapes
- Veneer Processing And Manufacture Of Plywood (AREA)
- Laminated Bodies (AREA)
Abstract
The invention relates to a producing method of a heat-resisting full eucalyptus laminated veneer. An artificial board is formed through high-temperature pressing and pasting melamine gummed paper and a substrate formed by multilayer eucalyptus single boards through adhesive bonding, and the producing method comprises the steps of single board sorting, gumming, cold pressing, hot pressing, stacking health maintenance and melamine gummed paper pasting. The producing method is characterized in that three-time cold pressing, three-time hot pressing, twice constant -temperature-room standing health maintenance and twice heat radiation health maintenance are adopted; the cold pressing temperature is room temperature, the cold pressing pressure is 0.5 to 0.8MPa, and the hot pressing pressure is 0.8 to 1.0MPa; the temperature of the first hot pressing is 115 to 120 DEG C; the temperature of the second hot pressing is 110 to 115 DEG C, and the temperature of the third hot pressing is 120 to 125 DEG C; the temperature of the constant-temperature-room standing health maintenance is 60 to 80 DEG C, and the time is 5 to 8 hours; the heat radiation health maintenance adopts the mode that the constant-temperature -room is cooled to the room temperature through natural ventilation, and the time is 3 to 4 hours.
Description
Technical field
The present invention relates to a kind of Wood-based Panel Production method, particularly a kind of manufacture method of heat-resisting full Eucalyptus lamination decoration panel.
Background technology
Eucalyptus is the general designation that Myrtaceae Myrtaceae eucalyptus belongs to the Eucalyptus plant, and the eucalyptus strong adaptability, also can grow in dead soil, and fast growth, and nursing cost is low, so cultivated area increases year by year.Eucalyptus Wood is red, glossy, without special odor, texture is staggered, structure is close, material is firmly heavy, flexible.Level larger eucalyptus in footpath is by being peeled into veneer, produce glued board or laminated veneer lumber as central layer, and small diameter grade, brush wood or the eucalyptus that is difficult to rotary-cut are processed into wood chip, for papermaking or producd fibers plate, so the comprehensive utilization ratio of eucalyptus can be increased to more than 90%.China had successfully developed high-performance Eucalyptus recombinant material, Eucalyptus laminated veneer lumber, bamboo eucalyptus composite, thick core eucalyptus composite plate made from solid wood and, without aldehyde Eucalyptus plywood making technology etc., Eucalyptus is more and more universal in the application of wood-based plate in recent years.
The Eucalyptus structure is close, material is hard, after the easy delamination of Eucalyptus laminated veneer lumber of making, particularly long-term use or the moisture absorption, easily plays drum.The climate temperature in southern summer is high, high humidity, and the Eucalyptus wood-based plate absorbs moisture, easily dilatancy.The method addressed this is that at present is the resin added that increases unit are, to improve Eucalyptus bonding force between layers.But resin added increases, and burst size of methanal is difficult to reach the burst size of methanal standard of national requirements.Employing is without the aldehyde adhesive, and cost is difficult to again accept.
Summary of the invention
The purpose of this invention is to provide a kind of heat-resisting full Eucalyptus lamination decoration panel, can under the environment of hot and humid degree, use and nonhygroscopic distortion for a long time for a long time, the present invention discloses the production method of this full Eucalyptus lamination decoration panel equally, being to have solved the drum problem on the one hand, is to reduce burst size of methanal on the one hand.
Technical scheme of the present invention is as follows:
In the production process of base material, adopt cold pressing for three times, three hot pressing, twice standing health of thermostatic chamber overcome bulging phenomenon with the method for heat radiation health.Concrete production technology is as follows:
Manually select Eucalyptus veneer of the same size, coat above-mentioned adhesive, resin added is generally 200～300g/m
2, assembly (3～15 layers), cold pressing for the first time, and temperature is normal temperature, and pressure is 0.5～0.8MPa, hot pressing for the first time, temperature is 115～120 ℃, pressure is 0.8～1.0MPa; 60～80 ℃ of standing healths of thermostatic chamber 5～8 hours, the naturally ventilated cooling of thermostatic chamber, heat radiation health 3～4h; Cold pressing for the second time, temperature is normal temperature, and pressure is 0.5～0.8MPa, hot pressing for the second time, and temperature is 110～115 ℃, pressure is 0.8～1.0MPa; The standing health of thermostatic chamber for the second time, the thermostatic chamber temperature is 60～80 ℃, time 90～120min, the naturally ventilated cooling of thermostatic chamber, heat radiation health 3～4h; Cold pressing for the third time, temperature is normal temperature, and pressure is 0.5～0.8MPa, hot pressing for the third time, temperature is 120～125 ℃, pressure is 0.8～1.0MPa, fixed thick with coarse sand and fine sandpaper polishing, paste low face side, the polishing face side, face side sticks the melamine gum dipped paper, hot pressing, and temperature is 120 ℃, pressure is 1.5MPa, heat radiation arranges, and beats limit, obtains heat-resisting full Eucalyptus lamination decoration panel.
Reduce the burst size of formaldehyde, at first will from improving adhesive-preparing technology, by improving adhesive-preparing technology, make raw material formaldehyde almost or complete reaction, reduce the residual quantity of formaldehyde.This adhesive-preparing technology adopts the disposable formaldehyde that adds, and adds at twice urea, and the method for a melamine promotes the complete reaction of formaldehyde.Add formaldehyde in reactor, with the first acid for adjusting pH value, be 2～2.5, the polyvinyl alcohol that adds formaldehyde weight 0.5～0.6%, the urea that adds formaldehyde weight 10%, be warming up to 50 ℃, insulation reaction 30min, the pH value of conditioned reaction liquid is 8～8.5, the urea that adds formaldehyde weight 25%, the melamine that adds formaldehyde weight 1%, be warming up to 90～95 ℃, insulation reaction 90min, reaction checks after finishing, if also contain formaldehyde, add appropriate urea or melamine to continue reaction, until detect the content<5mg/L of formaldehyde, the pH value that adds the alkali conditioned reaction to finish liquid is 7.2～7.5.Amino generation polycondensation reaction on aldehyde radical on formaldehyde molecule and urea or melamine molecule, generate macromolecular compound, along with constantly carrying out of condensation reaction, the molecular weight of the material that polycondensation reaction generates constantly increases, cause reactant liquor viscosity to increase, the mobility variation, reduced the probability of the collision of the formaldehyde that do not react and urea, and the high polymer embedding formaldehyde and the urea that generate, cause the outer formaldehyde of high polymer and urea effectively not to supplement to inside, cause the inner polymer molecular weight generated low.Polymer molecular weight is low, easily degraded, release formaldehyde.Therefore the one-step technology before, disposable formaldehyde and the urea of adding, easily cause the reaction in early stage violent, and the embedding phenomenon is very serious.So-called embedding phenomenon is exactly in polymerisation, the high molecular polymer generated encases polymerization single polymerization monomer, and the monomer of high molecular polymer the inside is polymerization reaction take place also, but because the monomer of outside can't give the reaction of the inside supplementary, therefore, the polymer molecular weight that high molecular polymer wraps is very little.The polymer substance molecular weight distribution that this phenomenon causes polymerisation to obtain is very wide, and level of residual monomers is very large.Because one-step method is reacted acutely in earlier stage, reaction polymer molecular weight in early stage is very large, and the later stage molecular weight is little, the formaldehyde of complete reaction is not many, the adhesive molecular weight distribution of making is very wide, and the artificial board formaldehyde burst size made from this adhesive is very large, has greatly endangered the healthy of user.The new technology that adds urea by gradation, avoided in earlier stage reaction too violent, adds for the first time the polymer molecular weight that reaction generates after urea can be very not large, because add for the first time the amount of urea seldom, the polymer generated is few, and viscosity is low, the good fluidity of material, do not have the phenomenon of embedding, therefore the molecular weight distribution of polymer is more even, adds for the second time urea, because the concentration of formaldehyde in reactant liquor has reduced much, react more steady, so the embedding phenomenon not very serious yet.
Formaldehyde almost completely reacts, the molecular weight of polycondensates narrowly distributing, and molecular weight is high, difficult degradation, as the adhesive of veneer, burst size of methanal is naturally low.
The good effect that the present invention produces is:
Office furniture of the present invention by full Eucalyptus lamination decoration panel production technology, adopt cold pressing for three times, three hot pressing, the production technology of twice standing health of thermostatic chamber and twice heat radiation health, can eliminate the stress of Eucalyptus intralamellar part, expand with heat and contract with cold after avoiding finished product to be heated to act on and hold yielding situation generation, and reduced the possibility that finished product chance water, the moisture absorption play drum, are out of shape.Use the technique in the present invention, can also reduce the finished product burst size of methanal, protected consumer's health.
2. the urea-formaldehyde resin adhesive that office furniture of the present invention adopts with full Eucalyptus lamination decoration panel is to adopt gradation to add the technique of urea, the formaldehyde monomers less residue, the repeatedly cold, hot pressure technique adopted in conjunction with the present invention, the burst size of methanal of finished product still less, more environmental protection.
The specific embodiment
Embodiment 1
At first prepare adhesive: add formaldehyde in reactor, with the first acid for adjusting pH value, be 2～2.5, the polyvinyl alcohol that adds formaldehyde weight 0.5～0.6%, the urea that adds formaldehyde weight 10%, be warming up to 50 ℃, insulation reaction 30min, the pH value of conditioned reaction liquid is 8～8.5, the urea that adds formaldehyde weight 25%, the melamine that adds formaldehyde weight 1%, be warming up to 90～95 ℃, insulation reaction 90min, reaction checks after finishing, if also contain formaldehyde, add appropriate urea or melamine to continue reaction, until detect the content<5mg/L of formaldehyde, the pH value that adds the alkali conditioned reaction to finish liquid is 7.2～7.5.
Manually select Eucalyptus veneer of the same size, coat above-mentioned adhesive, resin added is 300g/ ㎡, and 5 layers of assemblies, cold pressing for the first time, and temperature is normal temperature, and pressure is 0.5MPa, hot pressing for the first time, and temperature is 115～120 ℃, pressure is 0.8MPa; 60～80 ℃ of standing healths of thermostatic chamber 5～8 hours, the naturally ventilated cooling of thermostatic chamber, heat radiation health 3～4h; Cold pressing for the second time, temperature is normal temperature, and pressure is 0.5MPa, hot pressing for the second time, and temperature is 110～115 ℃, pressure is 0.8MPa; The standing health of thermostatic chamber for the second time, the thermostatic chamber temperature is 60～80 ℃, time 90～120min, the naturally ventilated cooling of thermostatic chamber, heat radiation health 3～4h; Cold pressing for the third time, temperature is normal temperature, and pressure is 0.5MPa, hot pressing for the third time, temperature is 120～125 ℃, pressure is 0.8MPa, fixed thick with coarse sand and fine sandpaper polishing, paste low face side, the polishing face side, face side sticks the melamine gum dipped paper, hot pressing, and temperature is 120 ℃, pressure is 1.5MPa, heat radiation arranges, and beats limit, obtains heat-resisting full Eucalyptus lamination decoration panel.
Embodiment 2
Manually select Eucalyptus veneer of the same size, coat the adhesive of embodiment 1, resin added is 250g/ ㎡, and assembly (7 layers), cold pressing for the first time, and temperature is normal temperature, and pressure is 0.65MPa, hot pressing for the first time, and temperature is 115～120 ℃, pressure is 0.9MPa; 60～80 ℃ of standing healths of thermostatic chamber 5～8 hours, the naturally ventilated cooling of thermostatic chamber, heat radiation health 3～4h; Cold pressing for the second time, temperature is normal temperature, and pressure is 0.65MPa, hot pressing for the second time, and temperature is 110～115 ℃, pressure is 0.9MPa; The standing health of thermostatic chamber for the second time, the thermostatic chamber temperature is 60～80 ℃, time 90～120min, the naturally ventilated cooling of thermostatic chamber, heat radiation health 3～4h; Cold pressing for the third time, temperature is normal temperature, and pressure is 0.65MPa, hot pressing for the third time, temperature is 120～125 ℃, pressure is 0.9MPa, fixed thick with coarse sand and fine sandpaper polishing, paste low face side, the polishing face side, face side sticks the melamine gum dipped paper, hot pressing, and temperature is 120 ℃, pressure is 1.5MPa, heat radiation arranges, and beats limit, obtains heat-resisting full Eucalyptus lamination decoration panel.
Embodiment 3
Manually select Eucalyptus veneer of the same size, coat the adhesive of embodiment 1, resin added is 200g/ ㎡, and assembly (9 layers), cold pressing for the first time, and temperature is normal temperature, and pressure is 0.8MPa, hot pressing for the first time, and temperature is 115～120 ℃, pressure is 1.0MPa; 60～80 ℃ of standing healths of thermostatic chamber 5～8 hours, the naturally ventilated cooling of thermostatic chamber, heat radiation health 3～4h; Cold pressing for the second time, temperature is normal temperature, and pressure is 0.8MPa, hot pressing for the second time, and temperature is 110～115 ℃, pressure is 1.0MPa; The standing health of thermostatic chamber for the second time, the thermostatic chamber temperature is 60～80 ℃, time 90～120min, the naturally ventilated cooling of thermostatic chamber, heat radiation health 3～4h; Cold pressing for the third time, temperature is normal temperature, and pressure is 0.8MPa, hot pressing for the third time, temperature is 120～125 ℃, pressure is 1.0MPa, fixed thick with coarse sand and fine sandpaper polishing, paste low face side, the polishing face side, face side sticks the melamine gum dipped paper, hot pressing, and temperature is 120 ℃, pressure is 1.5MPa, heat radiation arranges, and beats limit, obtains heat-resisting full Eucalyptus lamination decoration panel.
the comparative example 1
Manually select Eucalyptus veneer of the same size, coat the adhesive of embodiment 1, resin added is 300g/ ㎡, and assembly (11 layers), cold pressing, and temperature is normal temperature, and pressure is 2MPa, hot pressing, and temperature is 120～125 ℃, pressure is 3MPa; 60～80 ℃ of standing healths of thermostatic chamber 5～8 hours, the naturally ventilated cooling of thermostatic chamber, heat radiation health 3～4h; Fixed thick with coarse sand and fine sandpaper polishing, paste low face side, the polishing face side, face side sticks the melamine gum dipped paper, hot pressing, temperature is 160 ℃, and pressure is 1.5MPa, and heat radiation arranges, and beats limit, obtains heat-resisting full Eucalyptus lamination decoration panel.
the comparative example 2
Manually select Eucalyptus veneer of the same size, coat the adhesive of embodiment 1, resin added is 300g/ ㎡, and assembly (11 layers), cold pressing for the first time, and temperature is normal temperature, and pressure is 1.5MPa, hot pressing for the first time, and temperature is 115～120 ℃, pressure is 2.0MPa; 60～80 ℃ of standing healths of thermostatic chamber 5～8 hours, the naturally ventilated cooling of thermostatic chamber, heat radiation health 3～4h; Cold pressing for the second time, temperature is normal temperature, and pressure is 1.5MPa, hot pressing for the second time, and temperature is 110～115 ℃, pressure is 2.0MPa; The standing health of thermostatic chamber for the second time, the thermostatic chamber temperature is 60～80 ℃, time 90～120min, the naturally ventilated cooling of thermostatic chamber, heat radiation health 3～4h; Fixed thick with coarse sand and fine sandpaper polishing, paste low face side, the polishing face side, face side sticks the melamine gum dipped paper, hot pressing, temperature is 160 ℃, and pressure is 1.5MPa, and heat radiation arranges, and beats limit, obtains heat-resisting full Eucalyptus lamination decoration panel.
the comparative example 3
Manually select Eucalyptus veneer of the same size, coat the urea-formaldehyde resin adhesive of buying on market or common process is produced, resin added is 200g/ ㎡, assembly (9 layers), cold pressing for the first time, temperature is normal temperature, and pressure is 0.8MPa, hot pressing for the first time, temperature is 115～120 ℃, pressure is 1.0MPa; 60～80 ℃ of standing healths of thermostatic chamber 5～8 hours, the naturally ventilated cooling of thermostatic chamber, heat radiation health 3～4h; Cold pressing for the second time, temperature is normal temperature, and pressure is 0.8MPa, hot pressing for the second time, and temperature is 110～115 ℃, pressure is 1.0MPa; The standing health of thermostatic chamber for the second time, the thermostatic chamber temperature is 60～80 ℃, time 90～120min, the naturally ventilated cooling of thermostatic chamber, heat radiation health 3～4h; Cold pressing for the third time, temperature is normal temperature, and pressure is 0.8MPa, hot pressing for the third time, temperature is 120～125 ℃, pressure is 1.0MPa, fixed thick with coarse sand and fine sandpaper polishing, paste low face side, the polishing face side, face side sticks the melamine gum dipped paper, hot pressing, and temperature is 120 ℃, pressure is 1.5MPa, heat radiation arranges, and beats limit, obtains heat-resisting full Eucalyptus lamination decoration panel.
According to GB18580-2001 " in indoor decorating and refurnishing materials wood-based plate and goods thereof, burst size of methanal is limited the quantity of ", the burst size of methanal of products obtained therefrom in embodiment is measured; According to GB/T9846---the method detected in 2004 " glued boards " is measured the bonding strength of embodiment products obtained therefrom; The mensuration that plays the drum phenomenon of wood-based plate adopts water-boiling method, wood-based plate is cut out to the length for 80cm() * 30cm(is wide) specification, the thermostatted water of putting into 80 ℃ soaks, record wood-based plate and play the drum time used, the time is longer, illustrates that the quality of wood-based plate is better, under normal condition is used, more difficult drum.Each embodiment products obtained therefrom detects three times, and data are averaged, and every testing result is as shown in the table:
It can be seen from the table, heat-resisting full Eucalyptus lamination decoration panel employing of the present invention is colded pressing for three times, three hot pressing, the production technology of twice standing health of thermostatic chamber and twice heat radiation health can improve the bonding strength of wood-based plate, reduce burst size of methanal, because reduced the inner stress produced of full Eucalyptus lamination decoration panel, even wood-based plate expands with heat and contract with cold and also can easily not be out of shape because being heated, improved the heat resistance of wood-based plate; The reduction of burst size of methanal is except outside the Pass having with production technology; also relevant with the production technology of urea-formaldehyde resin adhesive; therefore only have the production technology of improving urea-formaldehyde resin adhesive and adopt Wood-based Panel Production technique of the present invention; could reduce to greatest extent the burst size of methanal of wood-based plate, the protection living environment.Heat-resisting full Eucalyptus lamination decoration panel good heat resistance of the present invention can be used for a long time under high humility, hot environment, is adapted at southern area and uses.
Claims (3)
1. the production method of heat-resisting full Eucalyptus lamination decoration panel, this wood-based plate is overlayed and forms by the bond base material that forms and melamine gum dipped paper high temperature of adhesive by multilayer Eucalyptus veneer, comprise veneer sorting, gluing, cold pressing, hot pressing, stacking health and paste melamine gum dipped paper step, it is characterized in that: adopt and cold pressing for three times and three hot pressing, twice standing health of thermostatic chamber and twice heat radiation health; The described temperature of colding pressing is room temperature, and pressure is 0.5～0.8MPa, and hot pressing pressure is 0.8～1.0MPa; The temperature of hot pressing for the first time is 115～120 ℃; The temperature of hot pressing for the second time is 110～115 ℃, and the temperature of hot pressing for the third time is 120～125 ℃; The standing health temperature of described thermostatic chamber is 60～80 ℃, and the time is 5～8h; Described heat radiation health is that the thermostatic chamber gravity-flow ventilation is cooled to room temperature, and the time is 3～4h; The temperature of pasting the melamine gum dipped paper on base material is 120 ℃, and pressure is 1.5Mpa.
2. the production method of heat-resisting full Eucalyptus lamination decoration panel according to claim 1, it is characterized in that: the production technology of described adhesive is as follows: adhesive-preparing technology adopts the disposable formaldehyde that adds, add at twice urea, the method for a melamine promotes the complete reaction of formaldehyde, add formaldehyde in reactor, with the first acid for adjusting pH value, be 2～2.5, the polyvinyl alcohol that adds formaldehyde weight 0.5～0.6%, the urea that adds formaldehyde weight 10%, be warming up to 50 ℃, insulation reaction 30min, the pH value of conditioned reaction liquid is 8～8.5, the urea that adds formaldehyde weight 25%, the melamine that adds formaldehyde weight 1%, be warming up to 90～95 ℃, insulation reaction 90min, reaction checks after finishing, if also contain formaldehyde, add appropriate urea or melamine to continue reaction, until detect the content<5mg/L of formaldehyde, the pH value that adds the alkali conditioned reaction to finish liquid is 7.2～7.5.
3. the heat-resisting full Eucalyptus lamination decoration panel obtained by production method claimed in claim 1.
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Cited By (4)
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|---|---|---|---|---|
| CN104290150A (en) * | 2014-09-26 | 2015-01-21 | 潘学扬 | Plywood or synclastic laminated material leveling method |
| CN104441105A (en) * | 2014-11-12 | 2015-03-25 | 广西鹿寨北林胶合板有限公司 | Method for producing clamp plate through lignin adhesives |
| CN104760107A (en) * | 2015-03-30 | 2015-07-08 | 广西宾阳县荣良新材料科技有限公司 | Production method for reducing formaldehyde of solid wood composite floor by using scavenger |
| CN116512364A (en) * | 2023-02-24 | 2023-08-01 | 湖北华盛新人造板有限公司 | Production process of fir veneer |
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| CN104290150A (en) * | 2014-09-26 | 2015-01-21 | 潘学扬 | Plywood or synclastic laminated material leveling method |
| CN104441105A (en) * | 2014-11-12 | 2015-03-25 | 广西鹿寨北林胶合板有限公司 | Method for producing clamp plate through lignin adhesives |
| CN104441105B (en) * | 2014-11-12 | 2016-09-07 | 广西鹿寨北林胶合板有限公司 | Method for producing plywood by adopting lignin adhesive |
| CN104760107A (en) * | 2015-03-30 | 2015-07-08 | 广西宾阳县荣良新材料科技有限公司 | Production method for reducing formaldehyde of solid wood composite floor by using scavenger |
| CN104760107B (en) * | 2015-03-30 | 2017-03-08 | 广西宾阳县荣良新材料科技有限公司 | A kind of scavenger reduces the production method of solid wooden compound floor formaldehyde |
| CN116512364A (en) * | 2023-02-24 | 2023-08-01 | 湖北华盛新人造板有限公司 | Production process of fir veneer |
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