CN109227860A - A kind of technique increasing Formaldehyde Free Wood-based Panel Prepressing intension using hot melt adhesive - Google Patents
A kind of technique increasing Formaldehyde Free Wood-based Panel Prepressing intension using hot melt adhesive Download PDFInfo
- Publication number
- CN109227860A CN109227860A CN201811215952.XA CN201811215952A CN109227860A CN 109227860 A CN109227860 A CN 109227860A CN 201811215952 A CN201811215952 A CN 201811215952A CN 109227860 A CN109227860 A CN 109227860A
- Authority
- CN
- China
- Prior art keywords
- hot melt
- melt adhesive
- prepressing
- intension
- layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/10—Moulding of mats
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N1/00—Pretreatment of moulding material
- B27N1/02—Mixing the material with binding agent
- B27N1/0209—Methods, e.g. characterised by the composition of the agent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/20—Moulding or pressing characterised by using platen-presses
- B27N3/203—Moulding or pressing characterised by using platen-presses with heating or cooling means
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The present invention provides a kind of technique for increasing Formaldehyde Free Wood-based Panel Prepressing intension using hot melt adhesive, it has the feature that, it include: step 1, by crops stalk disintegrating to 10~60 mesh fineness, 2%~8% polymeric MDI glue that weight is crops stalk is added and is stirred mixing, obtains stirring mixture；Step 2, before mating formation to stirring mixture, one layer of sanding powder of first mating formation, one layer of hot melt adhesive film of then mating formation on sanding powder mats formation on hot melt adhesive film and stirs mixture using as slab；Slab is carried out pressure roller using continuous preformer by step 3 under the conditions of 250~500kN/m2, is mated formation again one layer of hot melt adhesive film, then one layer of sanding powder of mating formation on the hot melt adhesive film on upper layer after pre-compaction forming in the upper surface of slab；Slab is sent into hot press by step 4, in 150~220 DEG C of hot pressing temperatures, 2400~3800kN/m2Hot-press solidifying is carried out under pressure condition into hair plates, then post-treated obtained wood-based plate.
Description
Technical field
The present invention relates to artificial board technology fields, and in particular to a kind of to increase the pre- pressure of Formaldehyde Free Wood-based Panel using hot melt adhesive
The technique of degree.
Background technique
The trend that artificial board formaldehyde burst size is current wood-based plate industry development is reduced, has more and more manufacturers and tastes
It tries in the technique of manufacture wood-based plate, adds methyl diphenylene diisocyanate (MDI) to improve the performance of wood-based plate, make artificial
Plate intensity increases, and expansion rate of water absorption reduces, and so that it is had certain fire protecting performance, substantially reduces its burst size of methanal.But
Since MDI itself is no sticky under normal temperature state, generation interlinkage reacts and can not only under specific temperature and pressure condition
It is inverse.Therefore can not be formed substantially during making sheet base, loose mistake type can only be prevented by liner plate support, so that pressing process
Intermittent pressing mode can only be used, time-consuming for intermittent pressing mode, thus influences production line production capacity, usual same size
Production line only has the one third of conventional urea-formaldehyde glue production line production capacity, or even less.
Summary of the invention
The present invention be to solve the above-mentioned problems and carry out, and it is an object of the present invention to provide it is a kind of using crops stalk as raw material,
The technique for increasing Formaldehyde Free Wood-based Panel Prepressing intension using hot melt adhesive improves Formaldehyde Free Wood-based Panel large-scale production production capacity.
The technique provided by the invention for being increased Formaldehyde Free Wood-based Panel Prepressing intension using hot melt adhesive, is had the feature that,
Include: step 1, by crops stalk disintegrating to 10~60 mesh fineness, the poly- of 2%~8% that weight is crops stalk is added
It closes MDI glue and is stirred mixing, obtain stirring mixture；Step 2 is first mated formation one layer before mating formation to stirring mixture
Sanding powder, one layer of hot melt adhesive film of then mating formation on sanding powder mat formation on hot melt adhesive film and stir mixture using as slab；Step
Rapid three, by slab using continuous preformer in 250~500kN/m2Under the conditions of carry out pressure roller, in the upper table of slab after pre-compaction forming
Face is mated formation one layer of hot melt adhesive film, then one layer of sanding powder of mating formation on the hot melt adhesive film on upper layer again；Slab is sent into heat by step 4
Press, in 150~220 DEG C of hot pressing temperatures, 2400~3800kN/m2Hot-press solidifying is carried out under pressure condition at hair plates, then after
It handles and wood-based plate is made.
In the technique provided by the invention for increasing Formaldehyde Free Wood-based Panel Prepressing intension using hot melt adhesive, there can also be this
The feature of sample: where the hot melt adhesive film of the upper and lower is to spray the thickness to be formed no more than 0.5mm by heating sol solution
Uniform hot melt glue film.
In the technique provided by the invention for increasing Formaldehyde Free Wood-based Panel Prepressing intension using hot melt adhesive, there can also be this
The feature of sample: where the sanding powder of the upper and lower with a thickness of 1.2mm~3mm.
In the technique provided by the invention for increasing Formaldehyde Free Wood-based Panel Prepressing intension using hot melt adhesive, there can also be this
The feature of sample: where sieved after crushing crops stalk to 10~60 mesh fineness, by the agriculture of 10~30 mesh fineness after screening
Crop stem is sent into sandwich layer feed bin, the crops stalks of 30~60 mesh is sent into surface layer feed bin, in sandwich layer feed bin and surface layer feed bin
Crops stalk be greater than sandwich layer resin added according to surface layer resin added and add polymeric MDI glue respectively and be stirred mixing, respectively must
To stirring mixture；Different stirring mixtures is dressed up into slab according to surface layer, sandwich layer, surface layer place Min layers.
In the technique provided by the invention for increasing Formaldehyde Free Wood-based Panel Prepressing intension using hot melt adhesive, there can also be this
The feature of sample: where crops stalk first passes through coarse crushing, re-dry to moisture content 9%~17%, then by the crops after drying
Stalk fine powder is broken to 10~60 mesh fineness.
In the technique provided by the invention for increasing Formaldehyde Free Wood-based Panel Prepressing intension using hot melt adhesive, there can also be this
The feature of sample: where the hot pressing in step 4 is segmented hot pressing, specifically includes the following steps: step 4-1, directly
Line boosts to 3000~3200kN/m2, keep 30~50s of constant pressure；Step 4-2 continues straight line and boosts to 3500~3800kN/m2,
Keep 30~50s of constant pressure；Step 4-3, straight line are depressurized to 2800~3000kN/m2, keep 30~50s of constant pressure；Step 4-4, after
Continuous straight line is depressurized to 2500~2400kN/m2, 30~50s of constant pressure holding.
In the technique provided by the invention for increasing Formaldehyde Free Wood-based Panel Prepressing intension using hot melt adhesive, there can also be this
The feature of sample: where include 80%~100% numb crop stem in crops stalk.
In the technique provided by the invention for increasing Formaldehyde Free Wood-based Panel Prepressing intension using hot melt adhesive, there can also be this
The feature of sample: where numb crop stem preferably is selected from bluish dogbane stalk, jute stalk, Chinese anesthesia stem, any one in flax stalk
Or several mixture.
In the technique provided by the invention for increasing Formaldehyde Free Wood-based Panel Prepressing intension using hot melt adhesive, there can also be this
The feature of sample: where polymeric MDI glue is prepared by the substance comprising following mass percent:
Polyalcohol is selected from one or several any mixture of ethylene glycol, 1,2-PD, glycerol；
Components of biomass preferably is selected from soy meal, wheat flour, cornstarch, tapioca, any one in potato starch
Or several mixture.
In the technique provided by the invention for increasing Formaldehyde Free Wood-based Panel Prepressing intension using hot melt adhesive, there can also be this
The feature of sample: where hot melt adhesive by the component comprising following mass parts ratio material composition:
Above-mentioned matrix component preferably is selected from ethylene-vinyl acetate copolymer, polyamide, polyethylene terephthalate, gathers
Any one or a few mixture in carbamate.
Action and effect of the invention:
The present invention abandons the use of liner plate in the technique using hot melt adhesive increase Formaldehyde Free Wood-based Panel Prepressing intension, made with fiber crops
Object stalk is that the polymeric MDI glue of primary raw material and special formulation is mutually stirred, is layered and mats formation, and before layering is mated formation
Rubber load-bearing conveyer belt sprays one layer of hot melt adhesive film in advance, enhances artificial board blank precompressed initial strength under normal-temperature, is convenient for
It is produced using multidaylight press mode, increases substantially efficiency, can be improved in the case where other conditions are constant using multidaylight press
2.5~3 times of production capacity.The present invention is a kind of high efficiency, low cost using the technique that hot melt adhesive increases Formaldehyde Free Wood-based Panel Prepressing intension
Technique solution route.
The hot melt adhesive film of injection is that thickness is not more than 0.5mm uniform hot melt glue film, has both guaranteed that slab kept shape to realize
Continuous precompressed, meets the technical requirements of subsequent hot pressing process, and avoids influencing finished synthetic's plate because hot melt adhesive film thickness is excessive
Quality.
Methyl diphenylene diisocyanate and polyphenyl polymethylene polyisocyanates are under hot pressing temperature in polymeric MDI glue
It crosslinking and reacts with ingredients such as numb crop stem lignin, celluloses, components of biomass is green non-poisonous, improvement pasting effect,
Plybonding effect, so that slab more preferably forms.The present invention adopts in the technique using hot melt adhesive increase Formaldehyde Free Wood-based Panel Prepressing intension
There is no the harm of Form aldehyde release nocuousness human health for rapid curing under the high temperature conditions for polymeric MDI glue.Hot melt adhesive is matched can
Wood-based plate intensity is effectively increased, formaldehyde is free of.The problem of wood-based plate obtained in this way is detrimental to health there is no release formaldehyde.
Crops stalk is by coarse crushing and finely divided, and strict control its moisture content, sufficiently crushes and obtains being suitable for thin
Degree, substantially increases the bonding area of stalk Yu polymeric MDI glue.Smashed crops stalk is carried out according to different fineness
Sizing, then is layered and mats formation, and such mode the dosage of polymeric MDI glue also can reach adhesion strength well below usual amounts to want
It asks.
The self-characteristic that numb crop stem is combined in wood-based plate manufacturing process of the present invention, is increased formaldehydeless using hot melt adhesive
Wood-based plate Prepressing intension, and keep its hot-forming effect good using more segmented heat pressing process, the hardened structure of finished synthetic obtained
Close careful, various aspects mechanical strength, which reaches, to match in excellence or beauty with the wood-based plate of timber is used, and tool has been widely used.
Detailed description of the invention
Fig. 1 is the process of the technique for increasing Formaldehyde Free Wood-based Panel Prepressing intension using hot melt adhesive in the embodiment of the present invention
Schematic diagram.
Specific embodiment
It is real below in order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention
It applies example combination attached drawing and the present invention is specifically addressed using the technique that hot melt adhesive increases Formaldehyde Free Wood-based Panel Prepressing intension.
<embodiment 1>
Then step 1 is compressed crops stalk using the crops stalk of the bluish dogbane stalk containing 80% as raw material
It is packed into firm position storage.The crops stalk of coarse crushing is dried through roller dryer, makes its moisture content in 9%~17% range
It is interior.
Crops stalk after drying is crushed using after the impurity such as the equipment such as selection by winnowing removal iron, stone into slimer
It to 10~60 mesh fineness and is sieved, the crops stalks of 10~30 mesh fineness is sent into sandwich layer feed bin after screening, by 30~
The crops stalk of 60 mesh is sent into surface layer feed bin.
Crops stalk in sandwich layer feed bin and surface layer feed bin is weighed respectively and it is measured by moisture tester
Moisture content is respectively fed in different blenders, glue spraying is carried out using PLC control glue-spraying device, according to corresponding Weight control
Glue spraying amount, control sandwich layer feed bin crops stalk be added weight be crops stalk dry weight 2% polymeric MDI glue sufficiently into
Row is stirred；The crops stalk of control plane layer stock bin is added the 3% polymeric MDI glue that weight is crops stalk dry weight and fills
Divide and be stirred mixing, is delivered in different raw material laying devices (as shown in Figure 1 41,42,43).
Step 2 as shown in Figure 1, layering is mated formation before blanket, first passes through sanding powder laying device 21 and transports in rubber load-bearing
Sanding powder with one layer of 1.2mm thickness of mating formation on 10 is as insulating powder.Rubber load-bearing conveyer belt 10 together with sanding powder together forward
It transmits (as shown by the arrows in Figure 1), then sprays hot melt sol solution on sanding powder by high-pressure spray gun 31 and form a layer thickness
Uniform hot melt glue film no more than 0.5mm.Rubber load-bearing conveyer belt 10 continues to forward, and passes through raw material laying device respectively
41,42,43 blanket is laid with by the crops stalk after being stirred is glued according to the sequence of surface layer, sandwich layer, surface layer.
Step 3, rubber load-bearing conveyer belt 10 continue to forward together with slab, and slab is existed using continuous preformer 50
450kN/m2Under the conditions of carry out pressure roller, pre-compaction forming is formed compared with stable state slab.It is logical in the upper surface of slab after pre-compaction forming
It crosses high-pressure spray gun 32 and sprays the uniform hot melt glue film that a layer thickness is not more than 0.5mm again, pass through sanding powder laying device later
22 mat formation one layer of 1.2mm thickness sanding powder on the hot melt adhesive film on upper layer.
Step 4, rubber load-bearing conveyer belt 10 is sent into layering hot press together with the slab after precompressed, in 220 DEG C of hot pressing temperatures
It is lower to pass through following hot pressing hot-press solidifying into hair plates:
Step 4-1: straight line boosts to 3100kN/m2, keep constant pressure 30s；
Step 4-2: continue straight line and boost to 3700kN/m2, keep constant pressure 30s；
Step 4-3: straight line is depressurized to 2800kN/m2, keep constant pressure 50s；
Step 4-4: continue straight line and be depressurized to 2500kN/m2, constant pressure holding 50s.Hair plates after molding is finally through sawing, cold
But, health, sanding get product wood-based plate.
Polymeric MDI glue is prepared by the substance comprising following mass percent in the present embodiment: diphenyl methane two is different
Cyanate 65%；Polyphenyl polymethylene polyisocyanates 25%；Ethylene glycol 9.7%；Cornstarch 0.3%.
Hot melt adhesive by the component comprising following mass parts ratio material composition: 20 parts of ethylene-vinyl acetate copolymer；It is poly-
20 parts of amide；11 parts of polyethylene terephthalate；11 parts of lauryl sodium sulfate；25 parts of rosin；14 parts of terpene resin.
<embodiment 2>
Then the compression of jute stalk is packed into firm position storage using jute stalk as raw material by step 1.The jute of coarse crushing
Stalk is dried through roller dryer, makes its moisture content in 9%~17% range.
Jute stalk after drying is crushed to using after the impurity such as the equipment such as selection by winnowing removal iron, stone into slimer
10~60 mesh fineness are simultaneously sieved, and the jute stalk of 10~30 mesh fineness are sent into sandwich layer feed bin after screening, by 30~60 mesh
Jute stalk be sent into surface layer feed bin.
Jute stalk in sandwich layer feed bin and surface layer feed bin is weighed respectively and measures it by moisture tester and is contained
Water rate is respectively fed in different blenders, is carried out glue spraying using PLC control glue-spraying device, is sprayed according to corresponding Weight control
Glue amount, the jute stalk of control sandwich layer feed bin are added the 4% polymeric MDI glue that weight is jute stalk dry weight and are sufficiently stirred
Mixing；The jute stalk of control plane layer stock bin is added the 6% polymeric MDI glue that weight is jute stalk dry weight and is sufficiently stirred
Mixing is delivered in different raw material laying devices (as shown in Figure 1 41,42,43).
Step 2 as shown in Figure 1, layering is mated formation before blanket, first passes through sanding powder laying device 21 and transports in rubber load-bearing
Sanding powder with one layer of 3mm thickness of mating formation on 10 is as insulating powder.Rubber load-bearing conveyer belt 10 is together with sanding powder together to forward pass
(as shown by the arrows in Figure 1) is sent, hot melt sol solution is then sprayed on sanding powder by high-pressure spray gun 31 and forms a layer thickness not
Uniform hot melt glue film greater than 0.5mm.Rubber load-bearing conveyer belt 10 continues to forward, respectively by raw material laying device 41,
42,43 blanket is laid with by the jute stalk after being stirred is glued according to the sequence of surface layer, sandwich layer, surface layer.
Step 3, rubber load-bearing conveyer belt 10 continue to forward together with slab, and slab is existed using continuous preformer 50
250kN/m2Under the conditions of carry out pressure roller, pre-compaction forming is formed compared with stable state slab.It is logical in the upper surface of slab after pre-compaction forming
It crosses high-pressure spray gun 32 and sprays the uniform hot melt glue film that a layer thickness is not more than 0.5mm again, pass through sanding powder laying device later
22 mat formation one layer of 3mm thickness sanding powder on the hot melt adhesive film on upper layer.
Step 4, rubber load-bearing conveyer belt 10 together with slab be sent into layering hot press, under 200 DEG C of hot pressing temperatures by with
Lower hot pressing hot-press solidifying is at hair plates:
Step 4-1, straight line boost to 3200kN/m2, keep constant pressure 40s；
Step 4-2 continues straight line and boosts to 3800kN/m2, keep constant pressure 40s；
Step 4-3, straight line are depressurized to 2900kN/m2, keep constant pressure 40s；
Step 4-4 continues straight line and is depressurized to 2400kN/m2, constant pressure holding 40s.Hair plates after molding is finally through sawing, cold
But, health, sanding get product wood-based plate.
Polymeric MDI glue is prepared by the substance comprising following mass percent in the present embodiment: diphenyl methane two is different
Cyanate 35%；Polyphenyl polymethylene polyisocyanates 36%；Ethylene glycol 6%；1,2-PD 8%；Glycerol 11%；Soybean
Powder 2%；Wheat flour 1%；Cornstarch 1%.
Hot melt adhesive by the component comprising following mass parts ratio material composition: 26 parts of polyamide；Poly terephthalic acid second
15 parts of diol ester；18 parts of polyurethanes；2 parts of lauryl sodium sulfate；26 parts of rosin；13 parts of terpene resin.
<embodiment 3>
Step 1, the numb crop stem mixed using bluish dogbane stalk, jute stalk is as raw material, then by numb stem of plant
Stalk compression is packed into firm position storage.The numb crop stem of coarse crushing is dried through roller dryer, make its moisture content 9%~
In 17% range.
Numb crop stem after drying is crushed using after the impurity such as the equipment such as selection by winnowing removal iron, stone into slimer
It to 10~60 mesh fineness and is sieved, the numb crop stems of 10~30 mesh fineness is sent into sandwich layer feed bin after screening, by 30~
The numb crop stem of 60 mesh is sent into surface layer feed bin.
Numb crop stem in sandwich layer feed bin and surface layer feed bin is weighed respectively and it is measured by moisture tester
Moisture content is respectively fed in different blenders, glue spraying is carried out using PLC control glue-spraying device, according to corresponding Weight control
Glue spraying amount, the numb crop stem of control sandwich layer feed bin be added 5% polymeric MDI glue that weight is numb crop stem dry weight sufficiently into
Row is stirred；The numb crop stem of control plane layer stock bin is added the 8% polymeric MDI glue that weight is numb crop stem dry weight and fills
Divide and be stirred mixing, is delivered in different raw material laying devices (as shown in Figure 1 41,42,43).
Step 2 as shown in Figure 1, layering is mated formation before blanket, first passes through sanding powder laying device 21 and transports in rubber load-bearing
Sanding powder with one layer of 2mm thickness of mating formation on 10 is as insulating powder.Rubber load-bearing conveyer belt 10 is together with sanding powder together to forward pass
(as shown by the arrows in Figure 1) is sent, hot melt sol solution is then sprayed on sanding powder by high-pressure spray gun 31 and forms a layer thickness not
Uniform hot melt glue film greater than 0.5mm.Rubber load-bearing conveyer belt 10 continues to forward, respectively by raw material laying device 41,
42,43 blanket is laid with by the numb crop stem after being stirred is glued according to the sequence of surface layer, sandwich layer, surface layer.
Step 3, rubber load-bearing conveyer belt 10 continue to forward together with slab, and slab is existed using continuous preformer 50
500kN/m2Under the conditions of carry out pressure roller, pre-compaction forming is formed compared with stable state slab.It is logical in the upper surface of slab after pre-compaction forming
It crosses high-pressure spray gun 32 and sprays the uniform hot melt glue film that a layer thickness is not more than 0.5mm again, pass through sanding powder laying device later
22 mat formation one layer of 2mm thickness sanding powder on the hot melt adhesive film on upper layer.
Step 4, rubber load-bearing conveyer belt 10 together with slab be sent into layering hot press, under 150 DEG C of hot pressing temperatures by with
Lower hot pressing hot-press solidifying is at hair plates:
Step 4-1, straight line boost to 3000kN/m2, keep constant pressure 50s；
Step 4-2 continues straight line and boosts to 3500kN/m2, keep constant pressure 50s；
Step 4-3, straight line are depressurized to 3000kN/m2, keep constant pressure 30s；
Step 4-4 continues straight line and is depressurized to 2400kN/m2, constant pressure holding 30s.Hair plates after molding is finally through sawing, cold
But, health, sanding get product wood-based plate.
Polymeric MDI glue is prepared by the substance comprising following mass percent in the present embodiment: diphenyl methane two is different
Cyanate 39%；Polyphenyl polymethylene polyisocyanates 48%；Ethylene glycol 8%；Soy meal 2%；Tapioca 2%；Ma Ling
Sweet potato starch 1%.
Hot melt adhesive by the component comprising following mass parts ratio material composition: 20 parts of ethylene-vinyl acetate copolymer；It is poly-
15 parts of ethylene glycol terephthalate；5 parts of polyurethanes；7 parts of lauryl sodium sulfate；18 parts of rosin；Terpene resin 15
Part.
Finished synthetic's plate made from Examples 1 to 3 is tested for the property, test result is as follows table:
Above embodiment is concrete case of the invention, the protection scope being not intended to limit the invention.
Claims (10)
1. a kind of technique for increasing Formaldehyde Free Wood-based Panel Prepressing intension using hot melt adhesive, which comprises the following steps:
2%~8% that weight is the crops stalk is added in crops stalk disintegrating to 10~60 mesh fineness by step 1
Polymeric MDI glue be stirred mixing, obtain stirring mixture；
Step 2, before mating formation to the stirring mixture, one layer of sanding powder of first mating formation, then on the sanding powder upper berth
One layer of hot melt adhesive film is filled, the stirring mixture of mating formation on the hot melt adhesive film is using as slab；
Step 3, by the slab using continuous preformer in 250~500kN/m2Under the conditions of carry out pressure roller, after pre-compaction forming
The upper surface of the slab is mated formation one layer of hot melt adhesive film, then one layer of sanding powder of mating formation on the hot melt adhesive film on upper layer again；
The slab is sent into hot press, in 150~220 DEG C of hot pressing temperatures, 2400~3800kN/m by step 42Under pressure condition
Hot-press solidifying is carried out into hair plates, then post-treated obtained wood-based plate.
2. the technique according to claim 1 for increasing Formaldehyde Free Wood-based Panel Prepressing intension using hot melt adhesive, it is characterised in that:
Wherein, the hot melt adhesive film of the upper and lower is to spray the thickness to be formed no more than 0.5mm by heating sol solution
Uniform hot melt glue film.
3. the technique according to claim 1 for increasing Formaldehyde Free Wood-based Panel Prepressing intension using hot melt adhesive, it is characterised in that:
Wherein, the sanding powder of the upper and lower with a thickness of 1.2mm~3mm.
4. the technique according to claim 1 for increasing Formaldehyde Free Wood-based Panel Prepressing intension using hot melt adhesive, it is characterised in that:
Wherein, it is sieved after crushing the crops stalk to 10~60 mesh fineness, by the institute of 10~30 mesh fineness after screening
It states crops stalk and is sent into sandwich layer feed bin, crops stalk described in 30~60 purposes is sent into surface layer feed bin,
The crops stalk in the sandwich layer feed bin and the surface layer feed bin is greater than sandwich layer resin added according to surface layer resin added
The polymeric MDI glue is added respectively and is stirred mixing, respectively obtains stirring mixture；
The different stirring mixtures is dressed up into the slab according to surface layer, sandwich layer, surface layer place Min layers.
5. the technique according to claim 3 for increasing Formaldehyde Free Wood-based Panel Prepressing intension using hot melt adhesive, it is characterised in that:
Wherein, the crops stalk first passes through coarse crushing, re-dry to moisture content 9%~17%, then by the agriculture after drying
Crop stem fine powder is broken to 10~60 mesh fineness.
6. the technique according to claim 1 for increasing Formaldehyde Free Wood-based Panel Prepressing intension using hot melt adhesive, it is characterised in that:
Wherein, the hot pressing in step 4 is segmented hot pressing, specifically includes the following steps:
Step 4-1, straight line boost to 3000~3200kN/m2, keep 30~50s of constant pressure；
Step 4-2 continues straight line and boosts to 3500~3800kN/m2, keep 30~50s of constant pressure；
Step 4-3, straight line are depressurized to 2800~3000kN/m2, keep 30~50s of constant pressure；
Step 4-4 continues straight line and is depressurized to 2400~2500kN/m2, 30~50s of constant pressure holding.
7. the technique according to claim 1 for increasing Formaldehyde Free Wood-based Panel Prepressing intension using hot melt adhesive, it is characterised in that:
Wherein, in the crops stalk include 80%~100% numb crop stem.
8. the technique according to claim 7 for increasing Formaldehyde Free Wood-based Panel Prepressing intension using hot melt adhesive, it is characterised in that:
Wherein, the numb crop stem preferably is selected from bluish dogbane stalk, jute stalk, Chinese anesthesia stem, any one in flax stalk
Or several mixture.
9. the technique according to claim 1 for increasing Formaldehyde Free Wood-based Panel Prepressing intension using hot melt adhesive, it is characterised in that:
Wherein, the polymeric MDI glue is prepared by the substance comprising following mass percent:
The components of biomass preferably is selected from soy meal, wheat flour, cornstarch, tapioca, any one in potato starch
Or several mixture.
10. the technique according to claim 1 for being increased Formaldehyde Free Wood-based Panel Prepressing intension using hot melt adhesive, feature are existed
In:
Wherein, the hot melt adhesive by the component comprising following mass parts ratio material composition:
Described matrix component preferably is selected from ethylene-vinyl acetate copolymer, polyamide, polyethylene terephthalate, poly- amino
Any one or a few mixture in formic acid esters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811215952.XA CN109227860A (en) | 2018-10-18 | 2018-10-18 | A kind of technique increasing Formaldehyde Free Wood-based Panel Prepressing intension using hot melt adhesive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811215952.XA CN109227860A (en) | 2018-10-18 | 2018-10-18 | A kind of technique increasing Formaldehyde Free Wood-based Panel Prepressing intension using hot melt adhesive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109227860A true CN109227860A (en) | 2019-01-18 |
Family
ID=65053736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811215952.XA Pending CN109227860A (en) | 2018-10-18 | 2018-10-18 | A kind of technique increasing Formaldehyde Free Wood-based Panel Prepressing intension using hot melt adhesive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109227860A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110616060A (en) * | 2019-09-12 | 2019-12-27 | 长春瑛隆材料科技有限公司 | Preparation method of environment-friendly adhesive for preparing straw board |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005061647A1 (en) * | 2003-12-19 | 2005-07-07 | Wtb Biotech Gmbh | Multicomponent binder, and use thereof |
| CN1785624A (en) * | 2005-10-28 | 2006-06-14 | 南京林业大学 | Industrial production method of aldehyde less thin straw board |
| CN101148056A (en) * | 2007-11-13 | 2008-03-26 | 江苏鼎元科技发展有限公司 | Formaldehyde-less composite stalk board production technology method and use |
| CN101164746A (en) * | 2006-10-18 | 2008-04-23 | 姜鹏 | Environmental protection regenerative wood residual density board and preparation method thereof |
| CN103568098A (en) * | 2012-08-01 | 2014-02-12 | 长沙创远环保科技有限公司 | Manufacturing method for aldehyde-free crop straw decorative plates |
| CN104263310A (en) * | 2014-09-19 | 2015-01-07 | 周建明 | Single-component moisture-curing polyurethane adhesive and preparation method thereof |
| CN106891396A (en) * | 2017-04-24 | 2017-06-27 | 福州翰扬环保科技有限公司 | It is a kind of to use the technique for producing little compressible glued board without aldehyde hot melt adhesive film |
| CN107841263A (en) * | 2017-11-15 | 2018-03-27 | 四川科立鑫新材料有限公司 | A kind of water-soluble hot-melt adhesive glue |
-
2018
- 2018-10-18 CN CN201811215952.XA patent/CN109227860A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005061647A1 (en) * | 2003-12-19 | 2005-07-07 | Wtb Biotech Gmbh | Multicomponent binder, and use thereof |
| CN1785624A (en) * | 2005-10-28 | 2006-06-14 | 南京林业大学 | Industrial production method of aldehyde less thin straw board |
| CN101164746A (en) * | 2006-10-18 | 2008-04-23 | 姜鹏 | Environmental protection regenerative wood residual density board and preparation method thereof |
| CN101148056A (en) * | 2007-11-13 | 2008-03-26 | 江苏鼎元科技发展有限公司 | Formaldehyde-less composite stalk board production technology method and use |
| CN103568098A (en) * | 2012-08-01 | 2014-02-12 | 长沙创远环保科技有限公司 | Manufacturing method for aldehyde-free crop straw decorative plates |
| CN104263310A (en) * | 2014-09-19 | 2015-01-07 | 周建明 | Single-component moisture-curing polyurethane adhesive and preparation method thereof |
| CN106891396A (en) * | 2017-04-24 | 2017-06-27 | 福州翰扬环保科技有限公司 | It is a kind of to use the technique for producing little compressible glued board without aldehyde hot melt adhesive film |
| CN107841263A (en) * | 2017-11-15 | 2018-03-27 | 四川科立鑫新材料有限公司 | A kind of water-soluble hot-melt adhesive glue |
Non-Patent Citations (1)
| Title |
|---|
| 孙玉绣: "《黏合剂配方与制备》", 30 November 2015, 中国纺织出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110616060A (en) * | 2019-09-12 | 2019-12-27 | 长春瑛隆材料科技有限公司 | Preparation method of environment-friendly adhesive for preparing straw board |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2168539C (en) | Process for the manufacture of shaped articles and product prepared therefrom | |
| CN101037000B (en) | Method for producing formaldehyde-free low-density crop straw grain board | |
| CN105171890A (en) | Shaving board manufacturing method | |
| CN101058207B (en) | Maize stalk and/or wheat stalk composite board and its manufacturing method | |
| CN101244580B (en) | Method for producing antennaria dioica flakeboard | |
| EP1363974B1 (en) | Method for preparing composite materials containing natural binders | |
| CN100429056C (en) | Method for producing aldehyde-free soft board made of wheat straw | |
| CN104802276A (en) | Preparation method of plant straw plate | |
| CN107972154A (en) | A kind of particieboard and its manufacture method containing tackifier | |
| CN101724282A (en) | Fungus chaff composite plate and preparation method thereof | |
| CN103568098A (en) | Manufacturing method for aldehyde-free crop straw decorative plates | |
| CN105128114A (en) | Method for preparing shaving board by using Jujuncao | |
| CN101691044A (en) | Method for preparing maize straw board | |
| CN109227860A (en) | A kind of technique increasing Formaldehyde Free Wood-based Panel Prepressing intension using hot melt adhesive | |
| CN109483686A (en) | A kind of manufacturing method of anesthesia stem Formaldehyde Free Wood-based Panel | |
| CN108274579A (en) | A kind of manufacturing method of oriented wood chipboard | |
| CN109227859A (en) | A kind of manufacturing method of cotton stalk Formaldehyde Free Wood-based Panel | |
| US6479164B1 (en) | Method for preparing composite materials from renewable raw materials | |
| CN101564863B (en) | Process for producing improved medium-density strawboard | |
| CN109049263A (en) | A kind of crops stalk mixes the manufacturing method of Formaldehyde Free Wood-based Panel processed | |
| CN109318337A (en) | Non- grain artificial board of straw and preparation method thereof | |
| CN109093815A (en) | A kind of technique increasing Formaldehyde Free Wood-based Panel Prepressing intension using polyurethane stick | |
| US20050127567A1 (en) | Method of manufacturing woody formed body and woody formed body | |
| CN101037001B (en) | Formaldehyde-free low-density crop straw grain board | |
| US20220348710A1 (en) | Formaldehyde-free binders and methods for producing the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190118 |
|
| WD01 | Invention patent application deemed withdrawn after publication |