CN103612295A - Method of manufacturing aldehyde-free plywood through cellulose modified soybean gum - Google Patents
Method of manufacturing aldehyde-free plywood through cellulose modified soybean gum Download PDFInfo
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- CN103612295A CN103612295A CN201310643471.XA CN201310643471A CN103612295A CN 103612295 A CN103612295 A CN 103612295A CN 201310643471 A CN201310643471 A CN 201310643471A CN 103612295 A CN103612295 A CN 103612295A
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Abstract
The invention provides a method of manufacturing aldehyde-free plywood through cellulose modified soybean gum. The method comprises the following steps: (1) the cellulose modified soybean gum is prepared; (2) wood veneer is preprocessed; (3) the wood veneer is subjected to cold plasma modification under normal pressure; (4) the wood veneer is gummed for bonding; (5) assembly is conducted, and then the wood veneer is hot pressed to be manufactured into a board. The method of manufacturing the aldehyde-free plywood through the cellulose modified soybean gum has the advantages that the bonding strength is high, wherein the bonding strength of the artificial board made from the wood veneer by means of production through the method can be increased by 5-40% in combination with a plasma surface processing technology and a cellulose strengthening means; energy is conserved and the environment is protected, wherein the method provides the processing technology that wood veneer surface physical modification is combined with adhesive modification, as a result, energy is saved, the number of adhesives for use is greatly reduced, a public nuisance is not caused, and the method meets the requirements for energy conservation and emission reduction in current industrial production; operation is simple and convenient and controllability is high, wherein the processing effect can be controlled according to the requirements for products by means of regulating processing technologies, processing time is short, and efficiency is high.
Description
Technical field
What the present invention relates to is a kind of method of utilizing cellulose modified bean gum to prepare aldehyde-free by wood.Belong to wood-based plate manufacturing technology field.
Background technology
Current, China's wood-based plate output occupies first of the whole world, and only 2012 1 year, national wood-based plate output just reached 2.86 billion cubic meters, increases by the first big country of 19.72% ，Shi world Wood-based Panel Production, consumption and foreign trade on a year-on-year basis.And in numerous wood-based panel products, output and the export volume of single board quasi-artificial board (comprising glued board, Multilayer solid wood composite floor base material and laminated veneer lumber etc.) occupy first place all the time.But also have larger difference in ，Yu developed country aspect production technology and product quality.More than 90% glued board of China is still Lauxite glued board at present, exists formaldehyde to discharge high defect, and this problem and based Wood Adhesives and bonding technique are closely related.In the research of present stage, the main method by improvement adhesive, production technology and post-processed reduces formaldehyde and discharges.For example, by preparing low mol ratio Lauxite, can reduce the full gear condensation of adhesive in solidification process, the formaldehyde that effectively reduces wood-based plate discharges; Or by the plasma treatment on veneer surface, reduce resin added, reach and reduce the object that formaldehyde discharges; Or the later stage, by face veneer is carried out to facing processing, reduces formaldehyde and discharges.
Yet these are improved one's methods all can only reduce the release of formaldehyde to a certain extent, cannot fundamentally realize the target discharging without aldehyde.Only from adhesive, start with, exploitation, without aldehyde adhesive, could be effected a radical cure the problem that formaldehyde discharges.Research without aldehyde glue at present comprises that synthesis type is without aldehyde adhesive, as adhesive for polyurethane; And natural glue, as soybean protein glue, tannin glue etc.In actual applications, the former price is comparatively expensive; And natural glue has and is difficult to compare favourably with synthetic adhesive in performance.Take that to study at present with widely used soy protein adhesives be example, 1. the problem conventionally existing comprises that adhesive viscosity is excessive, glue is difficult to infiltration at plate surface; 2. bean gum glued board poor water resistance, wet shear strength are too low.
Summary of the invention
What the present invention proposed is a kind of method of utilizing cellulose modified bean gum to prepare aldehyde-free by wood, its object is intended to for the existing above-mentioned defect of prior art, utilize cellulose modified bean gum, by plasma treatment, improve veneer surface-active, thereby improve the bean gum wetability on veneer surface, improve bean gum in the permeability on veneer surface and the wet shear strength of beans base glued board, thereby obtain high-intensity novel non-formaldehyde glued board.
Technical solution of the present invention: a kind of method of utilizing cellulose modified bean gum to prepare aldehyde-free by wood, comprises following processing step:
(1) preparation of cellulose modified bean gum: comprise 1) raw material of the soybean protein-containing of 20 ~ 30 grams is joined to the nanofiber cellulose solution of the mass fraction 0.1 ~ 1% of 270 ~ 300 grams; 2) add the aqueous slkali of 0 ~ 20 gram, regulate pH value to 8 ~ 12; 3) then add the plasticiser of 0 ~ 50 gram and the mould inhibitor of 0 ~ 10 gram, at 20 ~ 60 ℃, uniform stirring is 5 ~ 60 minutes;
(2) Wooden veneer pretreatment: be that 1 ~ 3mm Wooden veneer carries out drying and processing to thickness, adjust its moisture content to 6 ~ 16%;
(3) by Wooden veneer in normal pressure cold plasma modification: comprise 1) Wooden veneer after oven dry is placed on normal pressure cold plasma treatment system feeding web; 2) according to the thickness of processed Wooden veneer, adjust two by diamond spar ceramic coated electrode roller spacing, make Wooden veneer surface and the spacing of electrode remain on 0.5 ~ 1.5mm; 3) power-on, regulate processing power to 4500 ~ 8000W, make the air between two electrodes produce cold plasma by dielectric barrier discharge, make Wooden veneer pass through two sparking electrodes with the speed of 2 ~ 40m/min, under atmospheric pressure state, cold plasma modified processing is carried out in two of Wooden veneer surfaces simultaneously;
(4) be coated with glue glued adhesion: the cellulose modified bean gum of Wooden veneer surface-coated after processing, Wooden veneer, after the cold plasma modified processing of normal pressure, is guaranteeing that product quality is up to state standards under the prerequisite of related request, 300 ~ 500 grams/m of glue-spread
2;
(5) veneer of gluing is after ageing, by the requirement of various single board quasi-artificial board product structures, carry out assembly, after hot pressing, make again sheet material, heat pressing process is depending on various different product kinds, conventionally hot pressing temperature is 140 ~ 180 ℃, hot pressing pressure is 1.0 ~ 1.4MPa, and hot pressing time is 40 ~ 80s/mm.
Advantage of the present invention: (1) bonding strength is high: the present invention is in conjunction with Surface Treatment with Plasma technique and cellulose enhancements, the Wooden veneer wood-based plate that utilizes the present invention to produce to obtain, its bonding strength can improve 5 ~ 40%; (2) energy-conserving and environment-protective: this invention has proposed the treatment technology that the modification of a kind of Wooden veneer surface physics combines with adhesive modification, save the energy, greatly reduce adhesive consumption, and nuisanceless.Meet the requirement of current industrial production energy-saving and emission-reduction; (3) easy and simple to handle, controllability is strong: can by adjusting treatment process, control treatment effect according to the requirement of product, and the processing time is short, efficiency is high.
The specific embodiment
Utilize cellulose modified bean gum to prepare a method for aldehyde-free by wood, comprise following processing step:
(1) preparation of cellulose modified bean gum: comprise 1) raw material of the soybean protein-containing of 20 ~ 30 grams is joined to the nanofiber cellulose solution of the mass fraction 0.1 ~ 1% of 270 ~ 300 grams; 2) add the aqueous slkali of 0 ~ 20 gram, regulate pH value to 8 ~ 12; 3) then add the plasticiser of 0 ~ 50 gram and the mould inhibitor of 0 ~ 10 gram, at 20 ~ 60 ℃, uniform stirring is 5 ~ 60 minutes;
(2) Wooden veneer pretreatment: be that 1 ~ 3mm Wooden veneer carries out drying and processing to thickness, adjust its moisture content to 6 ~ 16%;
(3) by Wooden veneer in normal pressure cold plasma modification: comprise 1) Wooden veneer after oven dry is placed on normal pressure cold plasma treatment system feeding web; 2) according to the thickness of processed Wooden veneer, adjust two by diamond spar ceramic coated electrode roller spacing, make Wooden veneer surface and the spacing of electrode remain on 0.5 ~ 1.5mm; 3) power-on, regulate processing power to 4500 ~ 8000W, make the air between two electrodes produce cold plasma by dielectric barrier discharge, make Wooden veneer pass through two sparking electrodes with the speed of 2 ~ 40m/min, under atmospheric pressure state, cold plasma modified processing is carried out in two of Wooden veneer surfaces simultaneously;
(4) be coated with glue glued adhesion: the cellulose modified bean gum of Wooden veneer surface-coated after processing, Wooden veneer, after the cold plasma modified processing of normal pressure, is guaranteeing that product quality is up to state standards under the prerequisite of related request, 300 ~ 500 grams/m of glue-spread
2;
(5) veneer of gluing is after ageing, by the requirement of various single board quasi-artificial board product structures, carry out assembly, after hot pressing, make again sheet material, heat pressing process is depending on various different product kinds, conventionally hot pressing temperature is 140 ~ 180 ℃, hot pressing pressure is 1.0 ~ 1.4MPa, and hot pressing time is 40 ~ 80s/mm.
The raw material of described soybean protein-containing is soybean protein isolate, FSPC, soyabean protein powder, the soybean protein dregs of rice, bean powder or defatted soy flour.
Described saturated aqueous slkali is the solution of NaOH, potassium hydroxide or calcium hydroxide.
Described plasticiser is glycerine, ethylene glycol, diglycol, Macrogol 200, PEG400, polyethylene glycol 800, cetomacrogol 1000 or Macrogol 2000.
Described mould inhibitor is sorbic acid, potassium sorbate, benzoic acid, Sodium Benzoate or borax.
Described cellulose solution comprises microcrystalline cellulose, nanocrystalline cellulose, cellulose acetate, cellulose butyrate, acetylbutyrylcellulose, cellulose-acetate propionate or celluloid.
Embodiment 1:
The preparation of cellulose modified bean gum: the soybean protein isolate of 20g is joined in the nanofiber cellulose solution of 270g mass fraction 0.1%; At 20 ℃, uniform stirring is 5 minutes.
Board using poplar board (thickness is 1.0mm) moisture content is adjusted to 6%, is placed on normal pressure cold plasma treatment system feeding web.Adjust two electrode roller spacing, make Wooden veneer surface and the spacing of electrode remain on 0.5mm.Power-on, regulates processing power to 4500W, makes the air between two electrodes produce cold plasma by dielectric barrier discharge.Make Wooden veneer pass through sparking electrode with the speed of 2m/min, carry out cold plasma modified.Make the veneer surface-coated after processing by oneself cellulose modified bean gum, glue-spread is 300g/m
2(one side), is pressed into normal plywood with the after heat of three layers of veneer assembly.Heat pressing process: hot pressing temperature: 140 ℃, hot pressing pressure: 1.0MPa, hot pressing time: 40s/mm.After testing, the sheet material that the bonding strength of sheet material is made under same process condition with untreated veneer increases by 44.13%.
Embodiment 2:
The preparation of cellulose modified bean gum: the FSPC of 25g is joined in the nanofiber cellulose solution of 280g mass fraction 0.5%; Then add the saturated sodium hydroxide solution of about 15g, regulate pH value to 8; Then add 5g Macrogol 200 and 2g Sodium Benzoate, at 40 ℃, uniform stirring is 30 minutes.
Board using poplar board (thickness is 2.5mm) moisture content is adjusted to 8%, is placed on normal pressure cold plasma treatment system feeding web.Adjust two electrode roller spacing, make Wooden veneer surface and the spacing of electrode remain on 1mm.Power-on, regulates processing power to 6000W, makes the air between two electrodes produce cold plasma by dielectric barrier discharge.Make Wooden veneer pass through sparking electrode with the speed of 28m/min, carry out cold plasma modified.Make the veneer surface-coated after processing by oneself cellulose modified bean gum, glue-spread is 400g/m
2(one side), is pressed into normal plywood with the after heat of three layers of veneer assembly.Heat pressing process: hot pressing temperature: 170 ℃, hot pressing pressure: 1.2MPa, hot pressing time: 60s/mm.After testing, the sheet material that the bonding strength of sheet material is made under same process condition with untreated veneer increases by 35.48%.
Embodiment 3:
The preparation of cellulose modified bean gum: the soyabean protein powder of 30g is joined in the nanofiber cellulose solution of 300g mass fraction 1.0%; Then add the saturated potassium hydroxide solution of 20g, regulate pH value to 12; Then add 50g glycerine and 10g potassium sorbate, at 60 ℃, uniform stirring is 60 minutes.
Board using poplar board (thickness is 3.0mm) moisture content is adjusted to 16%, is placed on normal pressure cold plasma treatment system feeding web.Adjust two electrode roller spacing, make Wooden veneer surface and the spacing of electrode remain on 1.5mm.Power-on, regulates processing power to 8000W, makes the air between two electrodes produce cold plasma by dielectric barrier discharge.Make Wooden veneer pass through sparking electrode with the speed of 40m/min, carry out cold plasma modified.Make the veneer surface-coated after processing by oneself cellulose modified bean gum, glue-spread is 500g/m
2(one side), is pressed into normal plywood with the after heat of three layers of veneer assembly.Heat pressing process: hot pressing temperature: 180 ℃, hot pressing pressure: 1.4MPa, hot pressing time: 80s/mm.After testing, the sheet material that the bonding strength of sheet material is made under same process condition with untreated veneer increases by 9.72%.
Claims (6)
1. utilize cellulose modified bean gum to prepare a method for aldehyde-free by wood, it is characterized in that the method comprises following processing step:
(1) preparation of cellulose modified bean gum: comprise 1) raw material of the soybean protein-containing of 20 ~ 30 grams is joined to the nanofiber cellulose solution of the mass fraction 0.1 ~ 1% of 270 ~ 300 grams; 2) add the aqueous slkali of 0 ~ 20 gram, regulate pH value to 8 ~ 12; 3) then add the plasticiser of 0 ~ 50 gram and the mould inhibitor of 0 ~ 10 gram, at 20 ~ 60 ℃, uniform stirring is 5 ~ 60 minutes;
(2) Wooden veneer pretreatment: be that 1 ~ 3mm Wooden veneer carries out drying and processing to thickness, adjust its moisture content to 6 ~ 16%;
(3) by Wooden veneer in normal pressure cold plasma modification: comprise 1) Wooden veneer after oven dry is placed on normal pressure cold plasma treatment system feeding web; 2) according to the thickness of processed Wooden veneer, adjust two by diamond spar ceramic coated electrode roller spacing, make Wooden veneer surface and the spacing of electrode remain on 0.5 ~ 1.5mm; 3) power-on, regulate processing power to 4500 ~ 8000W, make the air between two electrodes produce cold plasma by dielectric barrier discharge, make Wooden veneer pass through two sparking electrodes with the speed of 2 ~ 40m/min, under atmospheric pressure state, cold plasma modified processing is carried out in two of Wooden veneer surfaces simultaneously;
(4) be coated with glue glued adhesion: the cellulose modified bean gum of Wooden veneer surface-coated after processing, Wooden veneer, after the cold plasma modified processing of normal pressure, is guaranteeing that product quality is up to state standards under the prerequisite of related request, 300 ~ 500 grams/m of glue-spread
2;
(5) veneer of gluing is after ageing, by the requirement of various single board quasi-artificial board product structures, carry out assembly, after hot pressing, make again sheet material, heat pressing process is depending on various different product kinds, conventionally hot pressing temperature is 140 ~ 180 ℃, hot pressing pressure is 1.0 ~ 1.4MPa, and hot pressing time is 40 ~ 80s/mm.
2. a kind of method of utilizing cellulose modified bean gum to prepare aldehyde-free by wood according to claim 1, is characterized in that the raw material of described soybean protein-containing is soybean protein isolate, FSPC, soyabean protein powder, the soybean protein dregs of rice, bean powder or defatted soy flour.
3. a kind of method of utilizing cellulose modified bean gum to prepare aldehyde-free by wood according to claim 1, is characterized in that described saturated aqueous slkali is NaOH, potassium hydroxide or aqua calcis.
4. a kind of method of utilizing cellulose modified bean gum to prepare aldehyde-free by wood according to claim 1, is characterized in that described plasticiser is glycerine, ethylene glycol, diglycol, Macrogol 200, PEG400, polyethylene glycol 800, cetomacrogol 1000 or Macrogol 2000.
5. a kind of method of utilizing cellulose modified bean gum to prepare aldehyde-free by wood according to claim 1, is characterized in that described mould inhibitor is sorbic acid, potassium sorbate, benzoic acid, Sodium Benzoate or borax.
6. a kind of method of utilizing cellulose modified bean gum to prepare aldehyde-free by wood according to claim 1, is characterized in that described cellulose solution comprises microcrystalline cellulose, nanocrystalline cellulose, cellulose acetate, cellulose butyrate, acetylbutyrylcellulose, cellulose-acetate propionate or celluloid.
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Cited By (12)
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| CN104690803A (en) * | 2015-02-14 | 2015-06-10 | 广西丰林木业集团股份有限公司 | Manufacturing method of fiber boards of non-formaldehyde soybean meal |
| CN104942936A (en) * | 2015-05-27 | 2015-09-30 | 阜南佳利工艺品有限公司 | Mulberry bark treatment liquid |
| CN105397898A (en) * | 2015-11-24 | 2016-03-16 | 中南林业科技大学 | Preparation method for artificial board without artificial formaldehyde release |
| CN105415468A (en) * | 2015-11-23 | 2016-03-23 | 安徽福佳竹木日用品有限公司 | Preparation method of mould-proof bamboo plywood |
| CN105505252A (en) * | 2016-01-26 | 2016-04-20 | 中南林业科技大学 | Soybean protein adhesive with nano esterified cellulose slurry as matrix and preparation method thereof |
| CN105542676A (en) * | 2016-01-26 | 2016-05-04 | 中南林业科技大学 | Starch adhesive with nanometer oxidized cellulose size as matrix and preparation method of starch adhesive |
| CN106945137A (en) * | 2017-05-02 | 2017-07-14 | 安徽省阜阳市庆霖木业有限责任公司 | A kind of production technology of formaldehydeless multi-plywood |
| CN106965273A (en) * | 2017-04-17 | 2017-07-21 | 南京林业大学 | The method that environment-friendly plywood is prepared using standard atmosphere plasma modified plastic sheeting |
| CN107363924A (en) * | 2016-05-12 | 2017-11-21 | 中国林业科学研究院木材工业研究所 | One kind is without aldehyde environment-friendly plywood and its manufacture method |
| CN109676710A (en) * | 2019-01-25 | 2019-04-26 | 广州皇冠实业有限公司 | A kind of manufacturing method of environment-friendly plywood |
| CN112536875A (en) * | 2020-12-21 | 2021-03-23 | 苏州闻洲包装工业有限公司 | Transportation packaging box wood preservation and strengthening process based on cellulose |
| WO2022019790A1 (en) * | 2020-07-22 | 2022-01-27 | Sestec Polska Sp. Z O.O. | Binding agent for cellulose-containing materials and a product containing it |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104690803A (en) * | 2015-02-14 | 2015-06-10 | 广西丰林木业集团股份有限公司 | Manufacturing method of fiber boards of non-formaldehyde soybean meal |
| CN104942936A (en) * | 2015-05-27 | 2015-09-30 | 阜南佳利工艺品有限公司 | Mulberry bark treatment liquid |
| CN105415468A (en) * | 2015-11-23 | 2016-03-23 | 安徽福佳竹木日用品有限公司 | Preparation method of mould-proof bamboo plywood |
| CN105397898A (en) * | 2015-11-24 | 2016-03-16 | 中南林业科技大学 | Preparation method for artificial board without artificial formaldehyde release |
| CN105505252B (en) * | 2016-01-26 | 2017-11-10 | 中南林业科技大学 | It is a kind of using nanometer esterified cellulose slurries as soy protein adhesives of parent and preparation method thereof |
| CN105542676A (en) * | 2016-01-26 | 2016-05-04 | 中南林业科技大学 | Starch adhesive with nanometer oxidized cellulose size as matrix and preparation method of starch adhesive |
| CN105542676B (en) * | 2016-01-26 | 2017-11-10 | 中南林业科技大学 | It is a kind of using nano oxidized cellulose slurries as starch adhesive of parent and preparation method thereof |
| CN105505252A (en) * | 2016-01-26 | 2016-04-20 | 中南林业科技大学 | Soybean protein adhesive with nano esterified cellulose slurry as matrix and preparation method thereof |
| CN107363924A (en) * | 2016-05-12 | 2017-11-21 | 中国林业科学研究院木材工业研究所 | One kind is without aldehyde environment-friendly plywood and its manufacture method |
| CN106965273A (en) * | 2017-04-17 | 2017-07-21 | 南京林业大学 | The method that environment-friendly plywood is prepared using standard atmosphere plasma modified plastic sheeting |
| CN106945137A (en) * | 2017-05-02 | 2017-07-14 | 安徽省阜阳市庆霖木业有限责任公司 | A kind of production technology of formaldehydeless multi-plywood |
| CN109676710A (en) * | 2019-01-25 | 2019-04-26 | 广州皇冠实业有限公司 | A kind of manufacturing method of environment-friendly plywood |
| WO2022019790A1 (en) * | 2020-07-22 | 2022-01-27 | Sestec Polska Sp. Z O.O. | Binding agent for cellulose-containing materials and a product containing it |
| CN112536875A (en) * | 2020-12-21 | 2021-03-23 | 苏州闻洲包装工业有限公司 | Transportation packaging box wood preservation and strengthening process based on cellulose |
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