CN104830258B - High anti-wet fiber plate sticks agent with modified urea-formaldehyde resin glue - Google Patents
High anti-wet fiber plate sticks agent with modified urea-formaldehyde resin glue Download PDFInfo
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- CN104830258B CN104830258B CN201410705633.2A CN201410705633A CN104830258B CN 104830258 B CN104830258 B CN 104830258B CN 201410705633 A CN201410705633 A CN 201410705633A CN 104830258 B CN104830258 B CN 104830258B
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- urea
- formaldehyde
- melamine
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- fiberboard
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- 239000000835 fiber Substances 0.000 title claims abstract description 25
- 239000003292 glue Substances 0.000 title claims abstract description 22
- GZCGUPFRVQAUEE-SLPGGIOYSA-N aldehydo-D-glucose Chemical class OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O GZCGUPFRVQAUEE-SLPGGIOYSA-N 0.000 title claims abstract description 10
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 9
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims abstract description 57
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000004202 carbamide Substances 0.000 claims abstract description 30
- 229920000877 Melamine resin Polymers 0.000 claims abstract description 24
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000002253 acid Substances 0.000 claims abstract description 12
- 235000013808 oxidized starch Nutrition 0.000 claims abstract description 12
- 239000001254 oxidized starch Substances 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 11
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 claims abstract description 3
- 238000009413 insulation Methods 0.000 claims description 15
- 238000010979 pH adjustment Methods 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 239000000084 colloidal system Substances 0.000 claims description 7
- 239000003513 alkali Substances 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 4
- 230000007613 environmental effect Effects 0.000 claims description 3
- 239000004836 Glue Stick Substances 0.000 claims description 2
- 239000011094 fiberboard Substances 0.000 abstract description 16
- 239000000853 adhesive Substances 0.000 abstract description 13
- 230000001070 adhesive effect Effects 0.000 abstract description 13
- 238000000034 method Methods 0.000 abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical class OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 230000009257 reactivity Effects 0.000 abstract description 2
- 230000007935 neutral effect Effects 0.000 abstract 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 37
- 235000011121 sodium hydroxide Nutrition 0.000 description 18
- 235000019256 formaldehyde Nutrition 0.000 description 17
- 229960004279 formaldehyde Drugs 0.000 description 16
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 238000003786 synthesis reaction Methods 0.000 description 4
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- ODGAOXROABLFNM-UHFFFAOYSA-N polynoxylin Chemical class O=C.NC(N)=O ODGAOXROABLFNM-UHFFFAOYSA-N 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- 229920002522 Wood fibre Polymers 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 235000011167 hydrochloric acid Nutrition 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 235000014347 soups Nutrition 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Landscapes
- Dry Formation Of Fiberboard And The Like (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
Agent is sticked with modified urea-formaldehyde resin glue the invention discloses a kind of high anti-wet fiber plate, is raw material by formaldehyde, urea, a small amount of melamine and oxidized starch, by changing traditional handicraft, is prepared using the weak acid neutral weak base technique of the urea 3 times of formaldehyde 1 time.Adhesive is had the netted improved structure of Uron rings and three azacyclo-s concurrently, both improved the reactivity of methylol molecular radical and hot-press solidifying effect in adhesive, hydrophilic radical can be effectively closed again.Fiberboard is prepared using the present invention, the water resistance and bonding strength of fiberboard can be significantly improved, fiberboard easy dilatancy and the problems such as intensity difference under high humidity atmosphere is solved, with water-fast, environmentally friendly and extend the service life function of fiberboard woodwork.
Description
Technical field
The invention belongs to fiberboard manufacturing technology field, more particularly to a kind of Midst density anti-wet fiber plate modified urea-formaldehyde
The technology of preparing of Resin adhesive.
Background technology
Medium density fibre board (MDF) is, using wood fibre or other plant fiber as raw material, to be prepared by fiber, apply adhesive
Or other additives, under heating pressurized conditions, thickness is pressed into not less than 1.5mm, and nominal density scope is in 0.65g/cm3-
Sheet material between 0.80g/cm3.
Medium density fibre board (MDF) is with the closely knit exquisiteness of uniform in material, structure, and surfacing is bright and clean, and performance is stable, radiationless and easy
In advantages such as processing, at present in Furniture manufacture and decorative craft of building using accounting for more than 90%, but most fibers
Plate is the furniture type or plain edition medium density fibre board (MDF) that use under drying regime, it is impossible to meet fiber under moist or climax wet condition
Plate is used to manufacture the use such as high-grade office furniture, integral cabinet, toilet furniture, partition of toilet, bath cabinet, bag storage cabinet and locker
On the way, the definition and requirement according to national standard GB/T11718-2009 to fiberboard under moist or climax wet condition, not only require fiber
Plate has minimum burst size of methanal(Environmental protection)And it is necessary to tested by humidity resistance(It is moistureproof), to prove that fiberboard has
Water resistance and preferable intensity, so as to ensure that woodwork furniture or ornaments that fiberboard is made are difficult to expand, ftracture, deform or distort
Destruction.But most domestic artificial board enterprise only produces the plain edition fiberboard used under drying regime, water resistance compared with
Difference, not only thickness swelling rate is higher, and often boils the i.e. expansion in 2 hours of 2 hours or 70 DEG C hot bubbly waters in boiling water and fall apart
Or be not molded, each index of mechanical strength etc. can not be more detected, to reach high moistureproof and waterproof purpose, it is necessary to which Fibreboard Production is used
Urea-formaldehyde adhesive and technique carry out synthesis improvement research.
The content of the invention
For the medium density fibre board (MDF) thickness swelling rate that is used under existing drying regime is high, moisture-sensitive deformation and intolerant to
The defects such as water, influence product uses scope and the service life of timber product's furniture.The invention provides a kind of high anti-wet fiber
Plate sticks agent with modified urea-formaldehyde resin glue, for manufacturing moistureproof medium density fibre board (MDF), and fiberboard mechanical property can be made to be better than GB/
Climax wet condition player whose turn comes next tool type uses medium density fibre board (MDF) as defined in T11718-2009(MDF-FN HMR), free formaldehyde reaches
Environmentally friendly E1/E0 grades, moistureproof and waterproof effect is obvious, expands fiberboard and uses scope and extension woodwork furniture service life.
The technical problem to be solved in the present invention is to provide a kind of high anti-wet fiber plate adhesive of function admirable.The present invention
Another to be solved technical problem provides a kind of easy and with low cost anti-wet fiber plate of production operation with modified urea-formaldehyde tree
Fat adhesive manufacture method.
In order to solve the above technical problems, the present invention uses following technical scheme:
High anti-wet fiber plate sticks agent, including following raw material weight proportioning of soup processed component with modified urea-formaldehyde resin glue:Formaldehyde 50.0-
55.0 parts, 30.0-35.0 parts of urea, 5.0-8.0 parts of melamine, 0.5-1.0 parts of oxidized starch and appropriate acid solution, alkali lye.
Preparation method includes following processing step:
1)Formaldehyde is disposably put into reactor, the lower acid solution that adds of stirring adjusts pH to be 3.5-5.0;
2)First time urea and oxidized starch are added, the addition of urea is the 40.0-44.0% of total colloid amount, and oxidation is formed sediment
The addition of powder is the 0.2-1.0% of total colloid amount;
3)40-50 DEG C is heated to, in 60-80 degree insulation reactions 20-60min;
4)Addition lye pH adjustment is 6.0-7.0, adds second of urea and melamine, and urea accounts for glue gross mass 27.0-
30.0%, melamine accounts for glue gross mass 1-3%, in 80-90 DEG C of insulation reaction 20-60min;
5)Lye pH adjustment=7.5-8.5 is added, second of melamine is added, melamine accounts for glue gross mass 4-7%, in
80-90 DEG C of insulation 20-60min;
6)70-75 DEG C is cooled to, third time urea is added, urea addition is total colloid amount 26.0-30.0%, is incubated 20-
60min;
7)Less than 45 DEG C are cooled to, lye pH adjustment=7.5-8.5 is added, discharging is made the high moistureproof medium density fiber of environmental protection
Plate sticks agent with modified urea-formaldehyde resin glue.
Modified urea-formaldehyde resin glue sticks agent preparation process and uses 1 formaldehyde, 2 feeding modes of -3 urea-melamines, and
Reacted successively in weak acid-neutrality-weak alkaline medium.
Adhesive of the present invention is prepared using the technique of weak acid-neutrality-weak base, and adds small amounts starch and melamine
Comprehensively modifying is carried out, adhesive is had the improved structure of Uron rings and three azacyclo-s concurrently, methylol point in Lauxite has both been improved
The reactivity and hot-press solidifying effect of subbase group, can effectively close hydrophilic radical again, so as to shorten adhesive in fiberboard heat
The hardening time of pressure and improve its bonding strength, be finally reached and improve the waterproof water resistance of fiberboard, with high mechanical strength and
The distinguishing features such as good stability of the dimension, solve fiberboard easy dilatancy and the problems such as intensity difference under high humidity atmosphere.This hair
Bright formaldehyde feeds intake for 1 time, urea feeds intake for three times, and melamine feeds intake twice, and makes raw material successively in pH=3.5-5.0,6.0-7.0
And after being reacted in tri- kinds of media environments of 7.5-8.5, finally prepare the water-repellent modified urea-formaldehyde resin adhesive of inexpensive high-quality.
With water-fast, environmentally friendly and extension fiberboard woodwork service life function.
Acid solution of the present invention is that any one or two kinds and the above in hydrochloric acid, formic acid, ammonium sulfate or ammonium chloride are mixed
Compound, and concentration of polymer solution is 20-50%.Described alkali lye be caustic soda, potassium hydroxide and triethanolamine in any one or
Two kinds and thing mixed above, and concentration of polymer solution is 20-50%.Described formalin mass fraction is 36.4-37.5%, institute
Urea purity >=98.0% stated, described melamine purity >=99.0%.
Invention adhesive quality is:Outward appearance is white viscous liquid, free formaldehyde≤0.08%, viscosity=16-25 seconds
(20 DEG C, T-4 glasss), hardening time=100-250 seconds, solids content=54 ± 1.0%, pH value=7.5-8.5, storage period >=20 day
。
Invention adhesive usage amount is 150-250kg/m3, is passed through at the defibrator process blow-off pipe that medium density fibre board (MDF) is produced
Screw pump is applied, and appropriate adjustment heat pressing process is constant, and fiberboard physical and mechanical properties can be made and humidity resistance is better than state
Mark《GB/T11718-2009 medium density fibre board (MDF)s》The furniture type medium density fibre board (MDF) used under high- humility state(FN-MDF
HMR)Specified in index request, meanwhile, burst size of methanal is≤5.0mg/100g, far below national standard《GB18580-2001 rooms
Interior trim finishing material wood-based plate and product Form aldehyde release limitation》It is defined E1 grades(≤9.0 mg/100g).
Embodiment
Technical scheme is described further with reference to example, it is of the present invention in addition to special indicate
Degree is mass percentage content.
Embodiment 1:
1st, raw material proportioning
Raw material | Weight(㎏) | Content(%) | Remarks |
Formaldehyde | 500 | 37.0 | |
Urea | 300 | 46.3 | U1=15、U2=70 U3=80 |
Melamine | 50 | 99.5 | M1=10、M2=40 |
Oxidized starch | 5 | Technical grade | |
Acid solution | In right amount | 20-50 | |
Alkali lye | In right amount | 20-50 |
2nd, synthesis technique step:
1)Formaldehyde is disposably put into reactor, the lower acid solution that adds of stirring adjusts pH to be 3.5-4.0.
2)First time urea and oxidized starch are added, the addition of urea is 45.0 % of total colloid amount.
3)40-50 DEG C is heated to, in 60-80 degree insulation reactions 20-30min.
4)Addition lye pH adjustment is 6.0-6.5, adds second of urea(Account for glue amount 20.0-25.0%)And melamine(Account for
The 1-2% of glue amount), in 80-90 DEG C of insulation reaction 20-60min.
5)Lye pH adjustment=7.5-8.5 is added, second of melamine is added(Account for the 4-5% of glue amount), in 80-90 DEG C of insulation
30-60min。
6)70-75 DEG C is cooled to, third time urea is added(Addition is the 25.0-30.0% of total colloid amount)It is incubated 20-
60min。
3)Less than 45 DEG C are cooled to, lye pH adjustment=7.5-8.5 dischargings are added.
3rd, product quality indicator:
Viscosity | 16.8S(T-4 glasss, 20 DEG C) | Density | 1.20㎏/m3 |
Solids content | 54.4% | Hardening time | 132S |
PH value | 7.82 | Outward appearance | Milky homogeneous liquid |
Free formaldehyde | 0.05% | Working life | >=20 days |
Embodiment 2:
1st, raw material proportioning
Raw material | Weight(㎏) | Content(%) | Remarks |
Formaldehyde | 600 | 37.0 | |
Urea | 350 | 46.3 | U1=185、U2=75 U3=90 |
Melamine | 80 | 99.5 | M1=20、M2=60 |
Oxidized starch | 10 | Technical grade | |
Acid solution | In right amount | 20-50 | |
Alkali lye | In right amount | 20-50 |
2nd, synthesis technique step:
1)Formaldehyde is disposably put into reactor, the lower acid solution that adds of stirring adjusts pH to be 4.0-4.5.
2)First time urea and oxidized starch are added, the addition of urea is the 50.0% of total rubber.
3)40-50 DEG C is heated to, in 60-80 DEG C of insulation reaction 30-40min.
4)Addition lye pH adjustment is 6.5-7.0, adds second of urea(Account for the 20.0-25.0% of glue amount)And melamine
(Account for the 1-3% of glue gross mass), in 80-90 DEG C of insulation reaction 30-40min.
5)Lye pH adjustment=7.8-8.0 is added, second of melamine is added(Account for the 4-7% of glue amount), in 80-90 DEG C of insulation
20-40min。
6)70-75 DEG C is cooled to, third time urea is added(Addition is the 25.0-30.0% of total colloid amount)It is incubated 20-
40min。
7)Less than 45 degree are cooled to, lye pH adjustment=7.5-8.5 dischargings are added,
3rd, product quality indicator:
Viscosity | 21.2S(T-4 glasss, 20 DEG C) | Density | 1.20㎏/m3 |
Solids content | 55.1% | Hardening time | 167S |
PH value | 8.15 | Outward appearance | Milky homogeneous liquid |
Free formaldehyde | 0.03% | Working life | >=20 days |
Embodiment 3:
1st, raw material proportioning
Raw material | Weight(㎏) | Content(%) | Remarks |
Formaldehyde | 500 | 37.0 | |
Urea | 350 | 46.3 | U1=170、U2=100 U3=80 |
Melamine | 80 | 99.5 | M1=12、M2=18 |
Oxidized starch | 10 | Technical grade | |
Acid solution | In right amount | 20-50 | |
Alkali lye | In right amount | 20-50 |
2nd, synthesis technique step:
1)Formaldehyde is disposably put into reactor, the lower acid solution that adds of stirring adjusts pH to be 4.5-5.0.
2)First time urea and oxidized starch are added, the addition of urea is the 48% of total rubber.
3)40-50 DEG C is heated to, in 60-80 degree insulation reactions 40-60min.
4)Addition lye pH adjustment is 6.0-6.5, adds second of urea(Account for the 20.0-25.0% of glue amount)And melamine
(Account for the 1-3% of glue gross mass), in 80-90 DEG C of insulation reaction 50-60min.
5)Lye pH adjustment=8.0-8.5 is added, second of melamine is added(Account for the 4-7% of glue amount), in 80-90 DEG C of insulation
50-60min。
6)70-75 DEG C is cooled to, third time urea is added(Account for the 25.0-30.0% of glue amount)It is incubated 40-60min.
7)Less than 45 DEG C are cooled to, lye pH adjustment=7.5-8.5 dischargings are added.
3rd, product quality indicator:
Viscosity | 20.6S(T-4 glasss, 20 DEG C) | Density | 1.20㎏/m3 |
Solids content | 54.9% | Hardening time | 235S |
PH value | 8.43 | Outward appearance | Milky homogeneous liquid |
Free formaldehyde | 0.01% | Working life | >=20 days |
Claims (1)
1. a kind of high anti-wet fiber plate sticks the preparation method of agent with modified urea-formaldehyde resin glue, it is characterised in that
The raw material is:50.0-55.0 parts of formaldehyde, 30.0-35.0 parts of urea, 5.0-8.0 parts of melamine, oxidized starch 0.5-
1.0 parts and acid solution, alkali lye;Its preparation method includes following processing step:
1)Formaldehyde is disposably put into reactor, the lower acid solution that adds of stirring adjusts pH to be 3.5-5.0;
2)First time urea and oxidized starch are added, the addition of oxidized starch is the 0.2-1.0% of total colloid amount;
3)40-50 DEG C is heated to, in 60-80 degree insulation reactions 20-60min;
4)Addition lye pH adjustment is 6.0-7.0, adds second of urea and melamine, and melamine accounts for glue gross mass 1-3%,
In 80-90 DEG C of insulation reaction 20-60min;
5)Lye pH adjustment=7.5-8.5 is added, second of melamine is added, melamine accounts for glue gross mass 4-7%, in 80-90
DEG C insulation 20-60min;
6)70-75 DEG C is cooled to, third time urea is added, 20-60min is incubated;
7)Less than 45 DEG C are cooled to, lye pH adjustment=7.5-8.5 dischargings are added, that is, the high moistureproof medium density fibre board (MDF) of environmental protection is made and uses
Modified urea-formaldehyde resin glue sticks agent.
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CN201410705633.2A CN104830258B (en) | 2014-11-28 | 2014-11-28 | High anti-wet fiber plate sticks agent with modified urea-formaldehyde resin glue |
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CN105599101A (en) * | 2015-12-25 | 2016-05-25 | 广西丰林木业集团股份有限公司 | Method for producing mold-proof function fiberboard |
CN107030841B (en) * | 2017-04-05 | 2019-09-10 | 大亚人造板集团有限公司 | Milling fiberboard and its production method are engraved in a kind of E0 grades of low imbibition |
CN106883798A (en) * | 2017-04-18 | 2017-06-23 | 广西丰林木业集团股份有限公司 | The consolidated floor base material manufacture adhesive that is modified |
CN109096967A (en) * | 2018-06-28 | 2018-12-28 | 广西丰林木业集团股份有限公司 | A kind of preparation method of composite modified gluing agent and the manufacturing method of anti-wet fiber plate |
CN110724485A (en) * | 2019-11-06 | 2020-01-24 | 徐州盛安化工科技有限公司 | Urea-formaldehyde resin adhesive and preparation method thereof |
CN113136049B (en) * | 2021-04-21 | 2023-03-21 | 广西三威家居新材股份有限公司 | Urea-formaldehyde resin reinforcing auxiliary agent, urea-formaldehyde resin for fiber board and preparation method |
CN114855504A (en) * | 2022-05-16 | 2022-08-05 | 广东轻工职业技术学院 | Glue applying combination for fluorine-free food paper and preparation method and application thereof |
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CN102408855A (en) * | 2011-07-18 | 2012-04-11 | 广西大学 | Urea-formaldehyde resin adhesive for moisture-proof environment-friendly medium density fiberboard, production method and composite additive |
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