CN106363715A - Manufacturing method of high-gluability flame-retardant plywood - Google Patents
Manufacturing method of high-gluability flame-retardant plywood Download PDFInfo
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- CN106363715A CN106363715A CN201610788814.5A CN201610788814A CN106363715A CN 106363715 A CN106363715 A CN 106363715A CN 201610788814 A CN201610788814 A CN 201610788814A CN 106363715 A CN106363715 A CN 106363715A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
- B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
- B27D1/08—Manufacture of shaped articles; Presses specially designed therefor
-
- 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
- B27K3/52—Impregnating agents containing mixtures of inorganic and organic compounds
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G12/00—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
- C08G12/02—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes
- C08G12/26—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds
- C08G12/34—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds and acyclic or carbocyclic compounds
- C08G12/36—Ureas; Thioureas
- C08G12/38—Ureas; Thioureas and melamines
-
- 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
- B27K2240/30—Fireproofing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
- B32B2037/1269—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives multi-component adhesive
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Forests & Forestry (AREA)
- Wood Science & Technology (AREA)
- Chemical & Material Sciences (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
- Veneer Processing And Manufacture Of Plywood (AREA)
Abstract
The invention discloses a manufacturing method of high-gluability flame-retardant plywood. The manufacturing method of the high-gluability flame-retardant plywood includes the operation steps that (1) impregnation liquid is obtained by mixing a commercial flame retardant solution with the mass concentration being 15-20%, a magnesium hydrate solution with the mass concentration being 0.5-1.0%, and a sodium dehydroacetate solution with the mass concentration being 0.1-0.3%; (2) after being impregnated, veneers are dried to reach the equilibrium moisture content; and (3) ammonium chloride and flour are added to self-made MUF resin, the mixture is evenly stirred and then evenly smeared on the veneers dried in the step (2), afterwards, hot pressing is carried out under the conditions that the temperature is 110-120 DEG C and the pressure is 1.2-1.5 MPa, and the high-gluability flame-retardant plywood is obtained. The gluing strength of the flame-retardant plywood manufactured through the method is enhanced, the hydrophily of the flame-retardant plywood is greatly improved, and thus the purpose of improving the quality of the flame-retardant plywood is realized. Furthermore, after the impregnation liquid is adopted for impregnation, the hot pressing temperature of the veneers is reduced, energy consumption is reduced, and production efficiency is improved.
Description
Technical field
The present invention relates to a kind of preparation method of flame-retardant plywood, particularly to a kind of system of high gluing flame-retardant plywood
Preparation Method.
Background technology
Timber itself is mainly made up of cellulose, hemicellulose, three kinds of materials of lignin, is a kind of porous anisotropy
Organic material.Modern furniture commonly uses the wood-based plates such as fibre board, plywood, particieboard and solid wood as raw material, and wood-based plate can
Make full use of timber resources, the wood flour that solid wood processing produces, wood shavings can be processed into wood-based plate through a series of.Timber because
For easy processing, easily unique performance such as acquisition, low, the temp. controllable damping of heat transfer coefficient and excellent environmentology characteristic the mankind's
Play the part of very important role in development history always, be widely used in building, each and the human lives such as finishing, furniture always
Closely related field.However, wood materials there is also many serious defects simultaneously, one of which is exactly inflammability.
Counted according to some country data, the direct economic loss caused by fire in worldwide at least 500,000,000 is beautiful
Unit.The home fire death toll of U.S. domestic constantly declines from 6000 people of 1977, and by 1993, only 3500 people, needed
It should be noted that this is institute all in the case of being continuously increased in the consumption of synthesis macromolecular material and the total number of people of the U.S.
The data obtaining.Although the fire problem of the U.S. substantially mitigates, its fire casualty number remains above other many and sends out
Reach country.It is the coefficient result of many factors that the fire casualty rate of the U.S. is minimized, but undeniably, fire retardant
Develop the effect played wherein extremely important.Therefore, for reducing economy and the personal casualty loss because fire causes, research and development efficiently hinder
Combustion agent is highly desirable to, for China.
Plywood is that one kind by two-sided or one side applying glue (usually one side applying glue) and is colded pressing or hot pressing, cutting edge, veneer
And a kind of wood-based plate completing.Eucalyptus plywood is one of China's modal plywood species, because it is cheap, former
Material easily obtains and is widely used.The anti-flammability of existing commercialization fire retardant is extensively admitted, and its fire resistance is by very
Many forefathers studied, but these commercial fire retardants are very big to plywood gluing performance impact, so that the easy degumming of plywood,
The service life of impact plywood；And the interpolation of fire retardant makes the hydrophilicity of plywood bad, therefore, need one kind badly fire-retardant
Agent is to improving fire-retardant Eucalyptus plywood mechanical property and hydrophilic, thus the method improving plywood quality.
The information being disclosed in this background section is merely intended to increase the understanding of the general background to the present invention, and should not
Recognize when being considered or imply in any form that this information structure has been the prior art well known to persons skilled in the art.
Content of the invention
For above-mentioned technical problem, the present invention provides a kind of preparation method of high gluing flame-retardant plywood it is intended to improve
With the addition of gluing and the hydrophilic of the plywood of fire retardant, thus obtaining a kind of high agglutinative plywood, to reach raising
The purpose of the quality of plywood.
For achieving the above object, the technical scheme that the present invention provides is as follows:
A kind of preparation method of high gluing flame-retardant plywood, comprises following operating procedure:
(1) preparation of impregnation liquid: commercial fire retardant is dissolved in water, forms the commercial fire retardant that mass concentration is 15～20% molten
Liquid, with mass concentration be 0.5～1.0% magnesium hydroxide solution, mass concentration be 0.1～0.3% dehydroacetic acid sodium solution mix
Close, obtain final product impregnation liquid；
(2) veneer dipping: after veneer being prepared in step (1) dipping in gained impregnation liquid, veneer dipping, done
Dry to equilibrium moisture content；
(3) preparation of plywood: homemade muf resin is added ammonium chloride dough-making powder, after stirring, uniform application exists
After being dried in step (2) on gained veneer, after one side applying glue, in length and breadth assembly, then at 110～120 DEG C, pressure is 1.2～
1.5mpa hot pressing, obtains final product product.
Wherein, the commercial fire retardant described in step (1) is fire retardant doher-6502.
Wherein, in step (2), veneer impregnates 24 hours.
Wherein, the ammonium chloride adding in step (3) is the 1% of the homemade muf resin quality adding, and the flour of addition is
The 2% of the homemade muf resin quality adding.
Wherein, homemade muf resin described in step (3), is prepared by following steps:
A () takes formaldehyde and polyvinyl alcohol (pva), mixing, stirring, and adjusting mixture ph value is 7.5～8.5, plus carbamide
(u1), tripolycyanamide, was warming up to 90 DEG C in 10～30 minutes and adjusts ph value for 7.0～8.0, obtained final product mixed liquor 1, was incubated 30
～50 minutes, mixed liquor ph value during insulation, is made to be 6.5～8.0；
B () adds formic acid solution to gained mixed liquor 1 in step (a), adjusting ph value is 5.0～7.0, and temperature is 85～95
DEG C insulation 30 minutes after, add a small amount of formic acid solution again, when flaky precipitate occurs, as reach home, then use alkali liquor
Adjusting ph value is 7.5～8.0, adds carbamide (u2), tripolycyanamide, obtains final product mixed liquor 2, control in mixed liquor 2 ph value for 7.0～
It is incubated 30 minutes at 8.5,80～95 DEG C；
C step (b) gained mixed liquor 2 is added carbamide (u3) to adjust mixed liquor 2ph value by () is 7.5～8.5,70～85 DEG C
Lower insulation 30 minutes, cooling, it is cooled to 50 DEG C, adjusting ph value is 7.5～9.0, obtains final product.
Wherein, formaldehyde in step (a): polyvinyl alcohol: carbamide: tripolycyanamide becomes mass ratio 424:1.5:149.2:15.
Wherein, adjusting ph value with the sodium hydroxide solution that mass concentration is 40% in step (a) is 7.5～8.5；Step
B sodium hydroxide solution that the alkali liquor described in () is 40% for mass concentration.
Wherein, in step (b), carbamide (u2): tripolycyanamide becomes mass ratio 56.3:22.5.
Wherein, carbamide (u3) in step (c): the polyvinyl alcohol=83.2:1.5 in step (a).
Wherein, 110～120 DEG C of hot pressing 10 minutes in step (3).
Compared with prior art, the invention has the following beneficial effects:
The inventive method prepares obtained flame-retardant plywood gluing intensity enhancing, substantially improves the hydrophilic of flame-retardant plywood
Property, thus realizing improving the purpose of flame-retardant plywood quality；Further, after using impregnation liquid of the present invention dipping, reduce plate
The temperature of material hot pressing, reduces energy consumption, improves production efficiency.
Brief description
Fig. 1 is according to embodiments of the present invention 1 to prepare products obtained therefrom contact angle test result；Wherein abscissa express time
S (), vertical coordinate represents contact angle (°).
Fig. 2 is according to embodiments of the present invention 2 to prepare products obtained therefrom contact angle test result；Wherein abscissa express time
S (), vertical coordinate represents contact angle (°).
Specific embodiment
Specific embodiment is described in detail below in conjunction with the accompanying drawings, it is to be understood that protection scope of the present invention is not subject to
The restriction of specific embodiment.
In the following example, 37% formalin, sodium hydroxide, analyze pure, Chengdu Ke Long chemical reagent factory；Carbamide,
Analyze pure, Tianjin Kermel Chemical Reagent Co., Ltd.；Formic acid solution, analysis is pure, the Tianjin richness limited public affairs of space fine chemistry industry
Department；Cyanurotriamide modified urea resin (muf), self-control；Flour；Commercial fire retardant agent doher-6502, Beijing is contained
Source Chemical Co., Ltd.；Monocomponent polyurethane adhesive, commercially available；
Veneer in embodiment uses Eucalyptus veneer (1.5mm × 425mm × 425mm), and moisture content is 10-14%,
Nanning Mo Shi wood-based plate company.
Embodiment 1
Homemade cyanurotriamide modified urea resin (muf) resin, is prepared by following steps:
A () takes formaldehyde 424g and polyvinyl alcohol (pva) 1.5g, put into mixing in four-hole boiling flask, start stirring, with 40%
It is 7.5～8.5 that sodium hydroxide solution adjusts mixture ph value, plus carbamide (u1) 149.2g, tripolycyanamide 15g, in 10 minutes
It is warming up to 90 DEG C and adjusts ph value for 7.0～8.0, obtain final product mixed liquor 1, be incubated 50 minutes, during insulation, make the mixed liquor ph value be
6.5～8.0；
B () adds formic acid solution to gained mixed liquor 1 in step (a) at twice, add formic acid solution to adjust ph for the first time
It is worth for 5.0～7.0, after temperature is 85 DEG C of insulations 30 minutes, then add formic acid solution second, that is, add a small amount of formic acid solution,
When flaky precipitate occurs, as reach home, terminal one arrives, at once adjusted with the sodium hydroxide solution that mass concentration is 40%
Ph value is 7.5～8.0, adds carbamide (u2) 56.3g, tripolycyanamide 22.5g, obtains final product mixed liquor 2, controls ph value in mixed liquor 2
For 7.0～8.5, at 80 DEG C, it is incubated 30 minutes；
C step (b) gained mixed liquor 2 is added carbamide (u3) 83.2g to adjust mixed liquor 2ph value by () is 7.5～8.5,85
It is incubated 30 minutes at DEG C, with solution in cold water cooling four-hole boiling flask, be cooled to 50 DEG C, adjusting ph value is 7.5～9.0, by solution
Pour in container, obtain final product, standby.
A kind of preparation method of high gluing flame-retardant plywood, operating procedure is as follows:
(1) preparation of impregnation liquid: fire retardant doher-6502 is dissolved in water, forms the fire retardant that mass concentration is 10%
Doher-6502 solution, with mass concentration be 1.0% magnesium hydroxide solution, mass concentration be 0.3% dehydroacetic acid sodium solution
Mixing, obtains final product impregnation liquid；
(2) Eucalyptus veneer dipping: Eucalyptus veneer (1.5mm × 425mm × 425mm) is prepared gained leaching in step (1)
Impregnate 24 hours in stain liquid, after Eucalyptus veneer dipping, be dried to equilibrium moisture content；
(3) preparation of plywood: above-mentioned standby homemade muf resin is added the chlorine of homemade muf resin quality 1%
Change the flour of ammonium and homemade muf resin quality 20%, after stirring, be dried in step (2) with scrub-brush uniform application
Afterwards on gained Eucalyptus veneer surface, one side applying glue, every face resin added is 30g, i.e. 166g/m2, crisscross assembly becomes three layers of glue
Plywood, then at 115 DEG C, pressure is 1.2～1.5mpa hot pressing 10 minutes, after the completion of hot pressing, by plywood at shady and cool ventilation
Standing 24 hours, obtains final product product.
Embodiment 2
Homemade cyanurotriamide modified urea resin (muf) resin, is prepared by following steps:
A () takes formaldehyde 424g and polyvinyl alcohol (pva) 1.5g, put into mixing in four-hole boiling flask, start stirring, with 40%
It is 7.5～8.5 that sodium hydroxide solution adjusts mixture ph value, plus carbamide (u1) 149.2g, tripolycyanamide 15g, in 30 minutes
It is warming up to 90 DEG C and adjusts ph value for 7.0～8.0, obtain final product mixed liquor 1, be incubated 30 minutes, during insulation, make the mixed liquor ph value be
6.5～8.0；
B () adds formic acid solution to gained mixed liquor 1 in step (a) at twice, add formic acid solution to adjust ph for the first time
It is worth for 5.0～7.0, after temperature is 95 DEG C of insulations 30 minutes, then add formic acid solution second, that is, add a small amount of formic acid solution,
When flaky precipitate occurs, as reach home, terminal one arrives, at once adjusted with the sodium hydroxide solution that mass concentration is 40%
Ph value is 7.5～8.0, adds carbamide (u2) 56.3g, tripolycyanamide 22.5g, obtains final product mixed liquor 2, controls ph value in mixed liquor 2
For 7.0～8.5, at 95 DEG C, it is incubated 30 minutes；
C step (b) gained mixed liquor 2 is added carbamide (u3) 83.2g to adjust mixed liquor 2ph value by () is 7.5～8.5,70
It is incubated 30 minutes at DEG C, with solution in cold water cooling four-hole boiling flask, be cooled to 50 DEG C, adjusting ph value is 7.5～9.0, by solution
Pour in container, obtain final product, standby.
A kind of preparation method of high gluing flame-retardant plywood, operating procedure is as follows:
(1) preparation of impregnation liquid: fire retardant doher-6502 is dissolved in water, forms the fire retardant that mass concentration is 20%
Doher-6502 solution, with mass concentration be 0.5% magnesium hydroxide solution, mass concentration be 0.1% dehydroacetic acid sodium solution
Mixing, obtains final product impregnation liquid；
(2) Eucalyptus veneer dipping: Eucalyptus veneer (1.5mm × 425mm × 425mm) is prepared gained leaching in step (1)
Impregnate 24 hours in stain liquid, after Eucalyptus veneer dipping, be dried to equilibrium moisture content；
(3) preparation of plywood: above-mentioned standby homemade muf resin is added the chlorine of homemade muf resin quality 1%
Change the flour of ammonium and homemade muf resin quality 20%, after stirring, be dried in step (2) with scrub-brush uniform application
Afterwards on gained Eucalyptus veneer surface, one side applying glue, every face resin added is 30g, i.e. 166g/m2, crisscross assembly becomes three layers of glue
Plywood, then at 110 DEG C, pressure is 1.2～1.5mpa hot pressing 10 minutes, after the completion of hot pressing, by plywood at shady and cool ventilation
Standing 24 hours, obtains final product product.
Embodiment 3
Homemade cyanurotriamide modified urea resin (muf) resin, is prepared by following steps:
A () takes formaldehyde 424g and polyvinyl alcohol (pva) 1.5g, put into mixing in four-hole boiling flask, start stirring, with 40%
It is 7.5～8.5 that sodium hydroxide solution adjusts mixture ph value, plus carbamide (u1) 149.2g, tripolycyanamide 15g, in 20 minutes
It is warming up to 90 DEG C and adjusts ph value for 7.0～8.0, obtain final product mixed liquor 1, be incubated 40 minutes, during insulation, make the mixed liquor ph value be
6.5～8.0；
B () adds formic acid solution to gained mixed liquor 1 in step (a) at twice, add formic acid solution to adjust ph for the first time
It is worth for 5.0～7.0, after temperature is 90 DEG C of insulations 30 minutes, then add formic acid solution second, that is, add a small amount of formic acid solution,
When flaky precipitate occurs, as reach home, terminal one arrives, at once adjusted with the sodium hydroxide solution that mass concentration is 40%
Ph value is 7.5～8.0, adds carbamide (u2) 56.3g, tripolycyanamide 22.5g, obtains final product mixed liquor 2, controls ph value in mixed liquor 2
For 7.0～8.5, at 87 DEG C, it is incubated 30 minutes；
C step (b) gained mixed liquor 2 is added carbamide (u3) 83.2g to adjust mixed liquor 2ph value by () is 7.5～8.5,78
It is incubated 30 minutes at DEG C, with solution in cold water cooling four-hole boiling flask, be cooled to 50 DEG C, adjusting ph value is 7.5～9.0, by solution
Pour in container, obtain final product, standby.
A kind of preparation method of high gluing flame-retardant plywood, operating procedure is as follows:
(1) preparation of impregnation liquid: fire retardant doher-6502 is dissolved in water, forms the fire retardant that mass concentration is 15%
Doher-6502 solution, with mass concentration be 0.7% magnesium hydroxide solution, mass concentration be 0.3% dehydroacetic acid sodium solution
Mixing, obtains final product impregnation liquid；
(2) Eucalyptus veneer dipping: Eucalyptus veneer (1.5mm × 425mm × 425mm) is prepared gained leaching in step (1)
Impregnate 24 hours in stain liquid, after Eucalyptus veneer dipping, be dried to equilibrium moisture content；
(3) preparation of plywood: above-mentioned standby homemade muf resin is added the chlorine of homemade muf resin quality 1%
Change the flour of ammonium and homemade muf resin quality 20%, after stirring, be dried in step (2) with scrub-brush uniform application
Afterwards on gained Eucalyptus veneer surface, one side applying glue, every face resin added is 30g, i.e. 166g/m2, crisscross assembly becomes three layers of glue
Plywood, then at 120 DEG C, pressure is 1.2～1.5mpa hot pressing 10 minutes, after the completion of hot pressing, by plywood at shady and cool ventilation
Standing 24 hours, obtains final product product.
Comparative example 1
A kind of preparation method of flame-retardant plywood, operating procedure is as follows:
(1) preparation of impregnation liquid: fire retardant doher-6502 is dissolved in water, forms the fire retardant that mass concentration is 10%
Doher-6502 solution, with mass concentration be 1.0% magnesium hydroxide solution, mass concentration be 0.3% dehydroacetic acid sodium solution
Mixing, obtains final product impregnation liquid；
(2) Eucalyptus veneer dipping: Eucalyptus veneer (1.5mm × 425mm × 425mm) is prepared gained leaching in step (1)
Impregnate 24 hours in stain liquid, after Eucalyptus veneer dipping, be dried to equilibrium moisture content；
(3) preparation of plywood: monocomponent polyurethane adhesive is added the ammonium chloride of monocomponent polyurethane adhesive 1%
With the flour of monocomponent polyurethane adhesive 20%, after stirring, institute after being dried in step (2) with scrub-brush uniform application
Obtain on Eucalyptus veneer surface, one side applying glue, every face resin added is 30g, i.e. 166g/m2, crisscross assembly becomes three layers of plywood,
Then at 115 DEG C, pressure is 1.2～1.5mpa hot pressing 10 minutes, after the completion of hot pressing, plywood is stood at shady and cool ventilation 24
Hour, obtain final product product.Comparative example 2
Homemade cyanurotriamide modified urea resin (muf) resin, is prepared by following steps:
A () takes formaldehyde 424g and polyvinyl alcohol (pva) 1.5g, put into mixing in four-hole boiling flask, start stirring, with 40%
It is 7.5～8.5 that sodium hydroxide solution adjusts mixture ph value, plus carbamide (u1) 149.2g, tripolycyanamide 15g, in 10 minutes
It is warming up to 90 DEG C and adjusts ph value for 7.0～8.0, obtain final product mixed liquor 1, be incubated 50 minutes, during insulation, make the mixed liquor ph value be
6.5～8.0；
B () adds formic acid solution to gained mixed liquor 1 in step (a) at twice, add formic acid solution to adjust ph for the first time
It is worth for 5.0～7.0, after temperature is 85 DEG C of insulations 30 minutes, then add formic acid solution second, that is, add a small amount of formic acid solution,
When flaky precipitate occurs, as reach home, terminal one arrives, at once adjusted with the sodium hydroxide solution that mass concentration is 40%
Ph value is 7.5～8.0, adds carbamide (u2) 56.3g, tripolycyanamide 22.5g, obtains final product mixed liquor 2, controls ph value in mixed liquor 2
For 7.0～8.5, at 80 DEG C, it is incubated 30 minutes；
C step (b) gained mixed liquor 2 is added carbamide (u3) 83.2g to adjust mixed liquor 2ph value by () is 7.5～8.5,85
It is incubated 30 minutes at DEG C, with solution in cold water cooling four-hole boiling flask, be cooled to 50 DEG C, adjusting ph value is 7.5～9.0, by solution
Pour in container, obtain final product, standby.
A kind of preparation method of flame-retardant plywood, operating procedure is as follows:
(1) preparation of impregnation liquid: fire retardant doher-6502 is dissolved in water, forms the fire retardant that mass concentration is 10%
Doher-6502 solution, is mixed for 1.0% magnesium hydroxide solution with mass concentration, obtains final product impregnation liquid；
(2) Eucalyptus veneer dipping: Eucalyptus veneer (1.5mm × 425mm × 425mm) is prepared gained leaching in step (1)
Impregnate 24 hours in stain liquid, after Eucalyptus veneer dipping, be dried to equilibrium moisture content；
(3) preparation of plywood: above-mentioned standby homemade muf resin is added the chlorine of homemade muf resin quality 1%
Change the flour of ammonium and homemade muf resin quality 20%, after stirring, be dried in step (2) with scrub-brush uniform application
Afterwards on gained Eucalyptus veneer surface, one side applying glue, every face resin added is 30g, i.e. 166g/m2, crisscross assembly becomes three layers of glue
Plywood, then at 130 DEG C, pressure is 1.2～1.5mpa hot pressing 10 minutes, after the completion of hot pressing, by plywood at shady and cool ventilation
Standing 24 hours, obtains final product product.
Performance test
1. the test of bonding strength:
Above-described embodiment 1～3, comparative example 1～2 are prepared obtained flame-retardant plywood saw it is sawn into and meet gb/t
The test specimen of 17657-2013 standard, a sawed test specimen part impregnates 3 hours in 65 ± 2 DEG C of water, and a part does not process,
Test specimen is tested its bonding strength with omnipotent mechanics machine.
Glue-joint strength: be measured according to gb/t 17657-2013 standard；
Dry strength: above-mentioned sawed test specimen two ends are clamped in a pair of floating holder of testing machine, make test specimen no curved
Bent and by clamp, the axis of universal testing machine floating holder, retaining part and notch should be passed through in test specimen center
Distance should be less than 5mm, with loading speed for 10mpa/min to test specimen loading to destroying, records its maximum load.
Wet strength: test specimen is immersed in 3h in 65 ± 2 DEG C of thermostat water baths, takes out immediately after 3h and installed with hermetic bag,
Carry out wet strength test, the same dry strength of method of testing after cooling 5min.
Above-mentioned test the data obtained is as shown in table 1.
Table 1
From data in table 1, the inventive method prepares gained high gluing flame-retardant plywood, and dry strength and wet strength are all
Bigger than products obtained therefrom intensity in comparative example 1 and comparative example 2, this explanation, the inventive method is existed with homemade muf resin
After soaking in dehydroacetic acid sodium solution, can effectively improve the gluing of obtained flame-retardant plywood, thus improving product matter
Amount.
2. contact angle test:
Because self-control muf resin is water-soluble resin, therefore measure the contact angle of water in contact angle test, to study dipping
Veneer is to the contact angle change detecting liquid afterwards；Detect that embodiment 1 and embodiment 2 gained prepare the contact angle of products obtained therefrom.
(1) use contact angle measurement, at syringe needle, extrude a water, decline syringe needle, when drop is contacted with product surface
Afterwards, rise syringe needle, and shoot with video-corder water sprawling and process of osmosis in wood chip surface；
(2) use software, the video shot with video-corder is processed, make software automatic measurement go out water droplet in the diffusion on wood chip surface
During contact angle change；During mensure, every group of test specimen selects 3 pieces, 1 point of every piece of selection, asks 3 pieces of meansigma methodss, the data obtained
As depicted in figs. 1 and 2.
As Fig. 1 prepares the contact angle test result of 3 samples of products obtained therefrom, connecing between three samples for embodiment 1
The change difference very little of feeler, the time dependent trend of contact angle of three samples is identical, is all as the increase of time, connects
Feeler is gradually lowered, and the speed reducing gradually slows down, and this illustrates that product hydrophilicity of the present invention is good.
As Fig. 2 prepares the contact angle test result of 3 samples of products obtained therefrom for embodiment 2: first sample and other
The contact angle of two samples is widely different, and this is probably the anisotropy of timber and the variability of timber leads to；Three samples
The time dependent trend of contact angle essentially identical, be all as the increase of time, contact angle is gradually lowered, and reduce speed
Rate gradually slows down, and this illustrates that product hydrophilicity of the present invention is good.
The description of the aforementioned specific illustrative embodiment to the present invention illustrate that and illustration purpose.These descriptions
It is not wishing to limit the invention to disclosed precise forms, and it will be apparent that according to above-mentioned teaching, can much be changed
And change.The purpose of selecting and describing the exemplary embodiment is that explaining that the certain principles of the present invention and its reality should
With so that those skilled in the art be capable of and utilize the present invention various different exemplary and
Various different selections and change.The scope of the present invention is intended to be limited by claims and its equivalents.
Claims (10)
1. a kind of preparation method of high gluing flame-retardant plywood is it is characterised in that comprise following operating procedure:
(1) preparation of impregnation liquid: mass concentration is 15～20% commercial retardant solution, is 0.5～1.0% with mass concentration
Magnesium hydroxide solution, mass concentration are 0.1～0.3% dehydroacetic acid sodium solution mixing, obtain final product impregnation liquid；
(2) veneer dipping: after veneer being prepared in step (1) in gained impregnation liquid dipping, veneer dipping, be dried to
Equilibrium moisture content；
(3) preparation of plywood: homemade muf resin is added ammonium chloride dough-making powder, after stirring, uniform application is in step
(2) on gained veneer after being dried in, then at 110～120 DEG C, pressure is 1.2～1.5mpa hot pressing, obtains final product product.
2. according to claim 1 high gluing flame-retardant plywood preparation method it is characterised in that: described in step (1)
Commercial fire retardant be fire retardant doher-6502.
3. according to claim 1 high gluing flame-retardant plywood preparation method it is characterised in that: veneer in step (2)
Dipping 24 hours.
4. according to claim 1 high gluing flame-retardant plywood preparation method it is characterised in that: add in step (3)
Ammonium chloride be the 1% of the homemade muf resin quality adding, the flour of addition is the homemade muf resin quality adding
2%.
5. according to claim 1 the preparation method of high gluing flame-retardant plywood it is characterised in that described in step (3)
Homemade muf resin, is prepared by following steps:
A () takes formaldehyde and polyvinyl alcohol, mixing, stirring, and adjusting mixture ph value is 7.5～8.5, plus carbamide (u1), melamine
Amine, was warming up to 90 DEG C in 10～30 minutes and adjusts ph value for 7.0～8.0, obtained final product mixed liquor 1, was incubated 30～50 minutes, protected
Mixed liquor ph value is made to be 6.5～8.0 during temperature；
B () adds formic acid solution to gained mixed liquor 1 in step (a), adjusting ph value is 5.0～7.0, and temperature is 85～95 DEG C of guarantors
Temperature, after 30 minutes, adds formic acid solution again, when flaky precipitate, as reaches home, and then adjusts ph value with alkali liquor
For 7.5～8.0, add carbamide (u2), tripolycyanamide, obtain final product mixed liquor 2, control ph value in mixed liquor 2 be 7.0～8.5,80～
It is incubated 30 minutes at 95 DEG C；
C step (b) gained mixed liquor 2 is added carbamide (u3) to adjust mixed liquor 2ph value by () is to protect at 7.5～8.5,70～85 DEG C
Temperature 30 minutes, cooling, it is cooled to 50 DEG C, adjusting ph value is 7.5～9.0, obtains final product.
6. according to claim 5 high gluing flame-retardant plywood preparation method it is characterised in that: formaldehyde in step (a):
Polyvinyl alcohol: carbamide: tripolycyanamide becomes mass ratio 424:1.5:149.2:15.
7. according to claim 5 high gluing flame-retardant plywood preparation method it is characterised in that: use matter in step (a)
Measuring the sodium hydroxide solution that concentration is 40% and adjusting ph value is 7.5～8.5；Alkali liquor described in step (b) for mass concentration is
40% sodium hydroxide solution.
8. according to claim 5 high gluing flame-retardant plywood preparation method it is characterised in that: carbamide in step (b)
(u2): tripolycyanamide becomes mass ratio 56.3:22.5.
9. according to claim 5 high gluing flame-retardant plywood preparation method it is characterised in that: carbamide in step (c)
(u3): the polyvinyl alcohol=83.2:1.5 in step (a).
10. according to claim 1 high gluing flame-retardant plywood preparation method it is characterised in that: 110 in step (3)
～120 DEG C of hot pressing 10 minutes.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110076859A (en) * | 2019-03-27 | 2019-08-02 | 深圳市吴越物流有限公司广州分公司 | A kind of preparation method of fire-retardant anti-mildew container bottom board |
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| CN102604573A (en) * | 2012-01-12 | 2012-07-25 | 北华大学 | E0-grade melamine modified urea-formaldehyde resin adhesive, and preparation method and application thereof |
| CN103624844A (en) * | 2013-12-13 | 2014-03-12 | 北京林业大学 | Preparation method of flame-retardant veneer |
| CN105479557A (en) * | 2015-11-23 | 2016-04-13 | 安徽国泰印务有限公司 | Processing technology of flame-retardant plywood |
| CN105643741A (en) * | 2016-02-25 | 2016-06-08 | 广西大学 | Fire retardant, preparation method thereof and application of fire retardant in flame-retardant plywood production |
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| CN101412231A (en) * | 2008-11-10 | 2009-04-22 | 德华兔宝宝装饰新材股份有限公司 | Method for producing flame-retardant glued board |
| CN102604573A (en) * | 2012-01-12 | 2012-07-25 | 北华大学 | E0-grade melamine modified urea-formaldehyde resin adhesive, and preparation method and application thereof |
| CN103624844A (en) * | 2013-12-13 | 2014-03-12 | 北京林业大学 | Preparation method of flame-retardant veneer |
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Application publication date: 20170201 |