CN114774077B - Preparation method of adhesive for plywood - Google Patents
Preparation method of adhesive for plywood Download PDFInfo
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- CN114774077B CN114774077B CN202210459907.9A CN202210459907A CN114774077B CN 114774077 B CN114774077 B CN 114774077B CN 202210459907 A CN202210459907 A CN 202210459907A CN 114774077 B CN114774077 B CN 114774077B
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- 230000001070 adhesive effect Effects 0.000 title claims abstract description 65
- 239000000853 adhesive Substances 0.000 title claims abstract description 64
- 239000011120 plywood Substances 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title claims abstract description 27
- 238000003756 stirring Methods 0.000 claims abstract description 198
- 239000011259 mixed solution Substances 0.000 claims abstract description 104
- 238000010438 heat treatment Methods 0.000 claims abstract description 43
- 108010073771 Soybean Proteins Proteins 0.000 claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 30
- 239000008367 deionised water Substances 0.000 claims abstract description 30
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 30
- 239000000843 powder Substances 0.000 claims abstract description 30
- 239000003513 alkali Substances 0.000 claims abstract description 21
- 238000006243 chemical reaction Methods 0.000 claims abstract description 21
- 235000019710 soybean protein Nutrition 0.000 claims abstract description 20
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 17
- 238000004132 cross linking Methods 0.000 claims abstract description 17
- 230000001877 deodorizing effect Effects 0.000 claims abstract description 17
- 239000000945 filler Substances 0.000 claims abstract description 17
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000004202 carbamide Substances 0.000 claims abstract description 15
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 15
- 238000001816 cooling Methods 0.000 claims abstract description 13
- 230000007246 mechanism Effects 0.000 claims description 47
- 239000007788 liquid Substances 0.000 claims description 45
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 36
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 36
- 230000005540 biological transmission Effects 0.000 claims description 35
- 238000002156 mixing Methods 0.000 claims description 34
- 239000000463 material Substances 0.000 claims description 27
- 239000002994 raw material Substances 0.000 claims description 21
- 229940001941 soy protein Drugs 0.000 claims description 20
- 238000012545 processing Methods 0.000 claims description 18
- IMQLKJBTEOYOSI-GPIVLXJGSA-N Inositol-hexakisphosphate Chemical compound OP(O)(=O)O[C@H]1[C@H](OP(O)(O)=O)[C@@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@@H]1OP(O)(O)=O IMQLKJBTEOYOSI-GPIVLXJGSA-N 0.000 claims description 17
- IMQLKJBTEOYOSI-UHFFFAOYSA-N Phytic acid Natural products OP(O)(=O)OC1C(OP(O)(O)=O)C(OP(O)(O)=O)C(OP(O)(O)=O)C(OP(O)(O)=O)C1OP(O)(O)=O IMQLKJBTEOYOSI-UHFFFAOYSA-N 0.000 claims description 17
- 239000002585 base Substances 0.000 claims description 17
- 235000002949 phytic acid Nutrition 0.000 claims description 17
- 229940068041 phytic acid Drugs 0.000 claims description 17
- 239000000467 phytic acid Substances 0.000 claims description 17
- 238000001914 filtration Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 7
- 238000005057 refrigeration Methods 0.000 claims description 2
- 239000012535 impurity Substances 0.000 abstract description 6
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 9
- 230000000694 effects Effects 0.000 description 9
- XPFVYQJUAUNWIW-UHFFFAOYSA-N furfuryl alcohol Chemical compound OCC1=CC=CO1 XPFVYQJUAUNWIW-UHFFFAOYSA-N 0.000 description 9
- 238000012360 testing method Methods 0.000 description 8
- 239000003292 glue Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 235000010469 Glycine max Nutrition 0.000 description 4
- 244000068988 Glycine max Species 0.000 description 4
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 3
- 238000009835 boiling Methods 0.000 description 3
- 239000003063 flame retardant Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 229920002101 Chitin Polymers 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- YUWBVKYVJWNVLE-UHFFFAOYSA-N [N].[P] Chemical compound [N].[P] YUWBVKYVJWNVLE-UHFFFAOYSA-N 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 238000010382 chemical cross-linking Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 235000018553 tannin Nutrition 0.000 description 1
- 229920001864 tannin Polymers 0.000 description 1
- 239000001648 tannin Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J189/00—Adhesives based on proteins; Adhesives based on derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08H—DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS
- C08H1/00—Macromolecular products derived from proteins
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Beans For Foods Or Fodder (AREA)
Abstract
The invention provides a preparation method of an adhesive for plywood, belongs to the technical field of adhesive preparation, and solves the technical problems that the existing adhesive has impurities, limited adhesive strength and the like. The preparation method of the adhesive for the plywood comprises the following steps: adding defatted soybean protein powder, deionized water, urea and sodium carbonate into a reaction kettle according to parts by weight, slowly heating to 50-100 ℃, uniformly stirring, cooling to 35-45 ℃, and preserving heat for 80-150min to obtain a first mixed solution; adding alkali into the first mixed solution, adjusting the pH to 8-11, heating to 45-80 ℃, and stirring for reaction for 30-50min to obtain a second mixed solution; adding defatted soybean protein powder, a bio-based crosslinking curing agent, deionized water and a deodorizing filler into another reaction kettle according to the parts by weight, heating to 40-80 ℃, and uniformly stirring to obtain a third mixed solution. The invention has the advantages of improving the utilization rate of the performance of each component, reducing impurities and improving the bonding strength.
Description
Technical Field
The invention belongs to the technical field of adhesive preparation, and relates to an adhesive, in particular to a preparation method of an adhesive for plywood.
Background
With the continuous popularization and deep popularization of sustainable development and green environment protection concepts, the preparation of bio-based adhesives and artificial boards and furniture bonding applications thereof by taking natural renewable biomass as a raw material is receiving a great deal of attention. Various biomass resources including cellulose, lignin, starch, soy protein, chitin, tannin, etc. have been used as renewable raw materials in the field of manufacturing of artificial boards.
The soybean protein is used as the raw material to prepare the wood adhesive, and has the advantages of reliability, richness, low cost, simple operation, green environment protection and the like. Therefore, the soybean protein adhesive is evaluated as a novel environment-friendly adhesive which is expected to replace the existing formaldehyde-based thermosetting adhesive. However, the existing soybean protein adhesive generally has the problems of poor water resistance, poor adhesive strength, low curing speed and the like, and limits the application of the soybean protein adhesive.
Through searching, for example, chinese patent literature discloses a full-biology-based double-component soybean adhesive, a preparation method and application thereof [ application number: 202110811515.X; publication No.: CN 113480970B ]. Wherein the raw materials of the adhesive comprise: soy protein, phytic acid, furfuryl alcohol and the like. The soybean protein-based adhesive is composed of two components, namely a soybean protein mixed main agent A and a crosslinking curing agent B. Wherein furfuryl alcohol is used as a bio-based cross-linking agent to form chemical cross-linking in the soybean protein glue, so that the adhesive property and the water resistance of the prepared soybean glue are obviously improved; the phytic acid can be used as an accelerator for furfuryl alcohol crosslinking, and can be used as a flame retardant because of containing a large amount of phosphorus elements, and a nitrogen-phosphorus synergistic flame-retardant system with excellent flame-retardant effect is formed by the phytic acid and a large amount of nitrogen elements contained in soybean protein, so that the thermal stability and flame retardance of the prepared soybean glue are obviously improved.
Although the preparation method disclosed in the patent improves the thermal stability and flame retardance of the prepared soybean glue, the preparation method has simple steps, so that impurities are easy to occur in the adhesive, the performances of the components cannot be fully utilized, and the bonding strength of the adhesive is limited.
Disclosure of Invention
The invention aims at solving the problems in the prior art, and provides a preparation method of an adhesive for plywood, which aims at solving the technical problems that: how to realize the improvement of the utilization rate of the performance of each component, reduce the impurity and further improve the bonding strength.
The aim of the invention can be achieved by the following technical scheme:
the preparation method of the adhesive for the plywood comprises the following steps:
firstly, adding defatted soybean protein powder, deionized water, urea and sodium carbonate into a reaction kettle according to parts by weight, slowly heating to 50-100 ℃, uniformly stirring, cooling to 35-45 ℃, and preserving heat for 80-150min to obtain a first mixed solution;
adding alkali into the first mixed solution, adjusting the pH to 8-11, heating to 45-80 ℃, and stirring for reaction for 30-50min to obtain a second mixed solution;
adding defatted soy protein powder, a bio-based crosslinking curing agent, deionized water and a deodorizing filler into another reaction kettle according to the parts by weight, heating to 40-80 ℃, and uniformly stirring to obtain a third mixed solution;
step four, adding part of the second mixed solution into part of the third mixed solution, keeping the temperature at 40-80 ℃, stirring and mixing, adding phytic acid, adjusting the PH to 1-3, cooling to room temperature, standing for 20-40min to obtain fourth mixed solution, and simultaneously mixing the rest of the second mixed solution with the rest of the third mixed solution to obtain fifth mixed solution;
step five, stirring and mixing the fifth mixed solution and the fourth mixed solution, heating to 60-120 ℃, and keeping the temperature for 20-40min to obtain a sixth mixed solution;
and step six, adding the sixth mixed solution into a filtering device for filtering, and heating and concentrating to obtain the adhesive.
The first step comprises the following raw materials in parts by mass: 10-18 parts of defatted soy protein powder, 30-65 parts of deionized water, 1-5 parts of urea and 0.6-1.5 parts of sodium carbonate.
The second step comprises the following alkali in parts by mass: 2-7 parts.
The third step comprises the following raw materials in parts by mass: 10-18 parts of defatted soy protein powder, 80-120 parts of bio-based crosslinking curing agent, 20-60 parts of deionized water and 25-40 parts of deodorizing filler.
The mass parts of the phytic acid in the fourth step are as follows: 5-15 parts.
The alkali is a mixture of sodium hydroxide and potassium hydroxide, and the mass ratio of the sodium hydroxide to the potassium hydroxide is as follows: 1:1.5.
In the fourth step, the second mixed solution of 2/5 of the second mixed solution in the second step is added into the third mixed solution.
The equipment adopted in the first to fifth steps is double-stirring cylinder type processing equipment, the double-stirring cylinder type processing equipment comprises a base, a first stirring cylinder is fixed on the upper side of the base through a first support, a second stirring cylinder is fixed on the upper side of the base through a second support, stirring mechanisms are arranged in the first stirring cylinder and the second stirring cylinder, each stirring mechanism comprises a stirring shaft, the lower end of each stirring shaft extends out of the first stirring cylinder and the second stirring cylinder, a driving cavity is formed in the base, a driving mechanism is arranged in the driving cavity, the stirring shaft is connected with the driving mechanism, a plurality of mounting seats are arranged on the stirring shaft, a transmission cavity is formed in the stirring shaft, transmission shafts are respectively fixed on the upper ends of the interiors of the first stirring cylinder and the second stirring cylinder, the lower ends of the transmission shafts extend into the transmission cavity, a plurality of rotating seats corresponding to the mounting seats are fixed on the transmission shafts, the inside of the rotating seat is provided with a cavity, the inside of the cavity is fixedly provided with a driving plate, the periphery of the driving plate is provided with a wavy surface, the periphery of the rotating seat is provided with an annular guide groove, a first threaded rod is connected in the annular guide groove in a sliding way, the outer side of the mounting seat is rotationally connected with a transverse stirring blade, the inside of the transverse stirring blade is provided with a sliding cavity, the first threaded rod is in threaded connection with the transverse stirring blade and extends into the sliding cavity, the other end of the first threaded rod is positioned in the cavity and is fixedly provided with a guide seat, the other side of the guide seat is provided with a ball which is abutted against the wavy surface, the periphery of the first threaded rod is sleeved with a reset spring, one end of the reset spring is fixedly connected with the guide seat, the other end of the reset spring is in sliding connection with the cavity, the periphery of the transverse stirring blade is fixedly provided with a plurality of longitudinal stirring blades, the inside of the transverse stirring blade is provided with a first temperature control cavity, the second temperature control cavity is formed in the longitudinal stirring blade, the first temperature control cavity is communicated with the second temperature control cavity, the heating component and the refrigerating component are arranged in the first temperature control cavity, a material conveying box is fixed between the first stirring barrel and the second stirring barrel, a piston plate is connected with the material conveying box in a sliding mode, a second driving rod is fixed on the lower side of the piston plate, the lower end of the second driving rod extends out of the material conveying box and is rotationally connected with the second driving rod, a transmission mechanism is arranged at the lower end of the second driving rod, a first bevel gear is fixed on the stirring shaft, and the first bevel gear is connected with the transmission mechanism.
By adopting the structure, when in operation, the defatted soy protein powder, deionized water, urea and sodium carbonate are added into the first stirring barrel, meanwhile, the defatted soy protein powder, the bio-based crosslinking curing agent, the deionized water and the deodorizing filler are added into the second stirring barrel, the driving mechanism is started, the driving mechanism drives the stirring shaft to rotate, the stirring shaft drives the transverse stirring blade and the longitudinal stirring blade to stir horizontally, when the transverse stirring blade rotates, under the action of the wave-shaped surface and the spring in the rotating seat, the guide seat drives the first threaded rod to reciprocate, the first threaded rod drives the transverse stirring blade to rotate, so that the longitudinal stirring blade rotates and stirs in the vertical direction, the same power is utilized to realize multi-directional stirring, and meanwhile, the heating assembly is started to heat the solutions in the first stirring barrel and the second stirring barrel, after the first mixed liquid is reacted, alkali is added into the first mixing drum, the temperature in the first mixing drum is increased to 45-80 ℃ by using a heating component again, the second mixed liquid is obtained, a third mixed liquid is obtained in the second mixing drum, then a transmission mechanism is meshed with a first bevel gear, the first bevel gear drives a first driving rod to rotate through the transmission mechanism, the first driving rod drives a piston plate to reciprocate through the second driving rod, and one-way valves are arranged on the first conveying pipe, the second conveying pipe, the third conveying pipe and the fourth conveying pipe, when the piston plate descends, the first conveying pipe pumps the third mixed liquid at the upper part of the second stirring cylinder into the material conveying box, when the piston plate ascends, the third mixed liquid is sent to the bottom of the first stirring cylinder through the fourth conveying pipe, meanwhile, when the piston plate ascends, the second mixed liquid in the first stirring cylinder is pumped into the material conveying box through the third conveying pipe, when the piston plate descends, the second mixed liquid is sent into the second stirring cylinder through the second conveying pipe, the circulation is carried out in such a way, so that part of the second mixed liquid and part of the third mixed liquid are mixed in the second stirring cylinder, then the transmission mechanism is separated from the first bevel gear, the material conveying box is not in operation, phytic acid is added, the PH is adjusted to be 1-3, the temperature is cooled to be 20-40min, the fourth mixed liquid is obtained, the rest second mixed liquid and the rest third mixed liquid are mixed in the first stirring cylinder, the fifth mixed liquid is obtained, the transmission mechanism is connected with the first bevel gear after winding, the work of the material conveying box is continued, the mixed quality of the mixed liquid and the mixed quality of the fifth mixed liquid is guaranteed, and the mixed quality of the mixed liquid is guaranteed continuously.
The driving mechanism comprises a driving motor, the driving motor is fixed in the driving cavity, a driving shaft is fixed at the output shaft end of the driving motor, a driving sprocket is fixed on the driving shaft, the lower end of the stirring shaft extends into the driving cavity and is fixed with a driven sprocket, and the driving sprocket is connected with the driven sprocket through a chain;
the transmission mechanism comprises an electric telescopic rod, the electric telescopic rod is fixed on the base, a supporting seat is fixed at the upper end of the electric telescopic rod, a U-shaped rod is rotatably connected to the supporting seat, second bevel gears are fixed at two ends of the U-shaped rod and meshed with the first bevel gears, a rotary sleeve is rotatably connected to the middle of the U-shaped rod, and the rotary sleeve is fixedly connected with the first driving rod.
By adopting the structure, when the automatic stirring device works, the driving motor rotates to drive the driving shaft to rotate, the driving shaft drives the driving sprocket to rotate, the driving sprocket drives the driven sprocket to rotate through the chain, so that the stirring mechanism rotates, the same motor drives two stirring mechanisms to rotate, the driving motor and the stirring shaft are not contacted, the influence of the temperature in the first stirring barrel and the second stirring barrel on the driving motor can be reduced to a certain extent, the two transmission mechanisms are arranged, the first bevel gear and the second bevel gear are separated, the electric telescopic rod drives the supporting seat to rise when the material conveying box works, the supporting seat drives the U-shaped rod to rise, the first bevel gear and the second bevel gear are meshed, the first bevel gear drives the second bevel gear to rotate at the moment, the second bevel gear drives the U-shaped rod to rotate, and the U-shaped rod drives the first driving rod and the second driving rod to move through the rotating sleeve, so that the driving of the piston plate is realized.
The piston plate is provided with two internal thread driving seats, the internal thread driving seats are internally connected with second threaded rods in a threaded manner, rotating rods are fixed at the upper end and the lower end of each second threaded rod, the other ends of the rotating rods are rotatably connected with a material conveying box, a plurality of horizontal stirring blades are fixed on the rotating rods, and the thread directions of the two second threaded rods are opposite.
By adopting the structure, when the piston plate moves up and down, the second threaded rod can be driven to rotate positively and negatively through the internal thread driving seat, so that the rotary rod drives the horizontal stirring blade to rotate, the materials can be stirred when being conveyed, the effect of mixing the materials is improved, and meanwhile, the two threaded rods are opposite in rotation direction, so that the mixing effect of the materials is further improved.
Compared with the prior art, the preparation method of the adhesive for the plywood has the following advantages:
1. the preparation method of the adhesive for the plywood has reasonable formula and scientific process, can lead materials in all components to fully react, can lead the performances of all components to fully play, can reduce impurities in the adhesive, improves the purity of the adhesive, greatly improves the bonding strength of the adhesive, and can adsorb peculiar smell such as formaldehyde and reduce the pollution to the environment by adding the deodorizing filler into the adhesive.
2. The double-stirring cylinder type processing equipment can be used for carrying out separate mixing reaction on raw materials, improving the processing efficiency, gradually mixing the second mixed solution and the third mixed solution, gradually mixing the fifth mixed solution and the fourth mixed solution, improving the mixing uniformity, and completely reacting the mixed solutions, thereby improving the utilization rate of each component to a certain extent and ensuring the bonding strength.
3. The structure of two churn formula processing equipment sets up, utilizes a power supply to realize two rabbling mechanism's multidirectional stirring to realized the work of conveying mechanism, reduced the complexity of equipment, reduced the cost of use, and rabbling mechanism's structure sets up, can carry the stirring effect and the homogeneity of heating to the material.
4. The structure setting of internal thread drive seat and second threaded rod can drive the positive reversal of second threaded rod through the internal thread drive seat when the piston board reciprocates to make the rotary rod drive horizontal stirring leaf rotatory, make the material when carrying, also can stir, advance the effect that improves the material and mix, the rotation direction of two threaded rods is opposite simultaneously, thereby further improvement material's mixed effect.
Drawings
Fig. 1 is a process flow diagram of the present invention.
FIG. 2 is a table of tests in the present invention.
Fig. 3 is a schematic perspective view of a double-stirring drum type processing apparatus according to the present invention.
FIG. 4 is a schematic view showing the internal structure of a double-stirring drum type processing apparatus according to the present invention.
FIG. 5 is a schematic view of the internal structure of the feed box in the present invention.
FIG. 6 is a schematic view of the stirring mechanism in the present invention.
FIG. 7 is a schematic view of a structure of a rotary base according to the present invention.
Fig. 8 is a schematic structural view of a transmission mechanism in the present invention.
In the figure, 1, a base; 2. a first support column; 3. a first stirring cylinder; 4. a second support; 5. a second stirring cylinder; 6. a feed box; 7. a stirring shaft; 8. a stirring mechanism; 9. a drive chamber; 10. a driving motor; 11. a drive shaft; 12. a drive sprocket; 13. a driven sprocket; 14. a first bevel gear; 15. a first driving lever; 16. a second driving lever; 17. a first delivery tube; 18. a second delivery tube; 19. a third delivery tube; 20. a fourth conveying pipe; 21. a piston plate; 22. an internal thread driving seat; 23. a second threaded rod; 24. a rotating rod; 25. a horizontal stirring blade; 26. a transmission shaft; 27. a rotating seat; 28. a transmission cavity; 29. a mounting base; 30. a first threaded rod; 31. transversely stirring the leaves; 32. a sliding chamber; 33. longitudinal stirring blades; 34. a first temperature control chamber; 35. a second temperature control chamber; 36. a heating assembly; 37. a refrigeration assembly; 38. a cavity; 39. a driving plate; 40. a wave-shaped surface; 41. an annular guide groove; 42. a guide seat; 43. a return spring; 44. a ball; 45. a U-shaped rod; 46. a support base; 47. an electric telescopic rod; 48. a second bevel gear; 49. and (5) rotating the sleeve.
Detailed Description
The following are specific embodiments of the present invention and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
Example 1
As shown in fig. 1, the preparation method of the adhesive for the plywood comprises the following steps:
adding defatted soybean protein powder, deionized water, urea and sodium carbonate into a reaction kettle according to parts by weight, slowly heating to 75 ℃, uniformly stirring, cooling to 40 ℃, and preserving heat for 110min to obtain a first mixed solution;
adding alkali into the first mixed solution, adjusting the PH value to be 10, heating to 60 ℃, and stirring for reacting for 40min to obtain a second mixed solution;
adding defatted soy protein powder, a bio-based crosslinking curing agent, deionized water and a deodorizing filler into another reaction kettle according to the parts by weight, heating to 60 ℃, and uniformly stirring to obtain a third mixed solution;
step four, adding part of the second mixed solution into part of the third mixed solution, maintaining the temperature at 60 ℃, stirring and mixing, adding phytic acid, adjusting the PH value to be 2, cooling to room temperature, standing for 30min to obtain a fourth mixed solution, and simultaneously mixing the rest of the second mixed solution with the third mixed solution to obtain a fifth mixed solution;
step five, stirring and mixing the fifth mixed solution and the fourth mixed solution, heating to 90 ℃, and standing at the temperature for 30min to obtain a sixth mixed solution;
and step six, adding the sixth mixed solution into a filtering device for filtering, and heating and concentrating to obtain the adhesive.
The first step comprises the following raw materials in parts by mass: 14 parts of defatted soybean protein powder, 45 parts of deionized water, 3 parts of urea and 1 part of sodium carbonate.
The mass portion of the alkali in the second step is as follows: 4 parts.
The third step comprises the following raw materials in parts by mass: 4 parts of defatted soy protein powder, 100 parts of bio-based crosslinking curing agent, 40 parts of deionized water and 32 parts of deodorizing filler.
The mass parts of the phytic acid in the fourth step are as follows: 10 parts.
The alkali is a mixture of sodium hydroxide and potassium hydroxide, and the mass parts ratio of the sodium hydroxide to the potassium hydroxide is as follows: 1:1.5.
In the fourth step, the second mixed liquid of 2/5 of the second mixed liquid in the second step is added into the third mixed liquid.
Example two
As shown in fig. 1, the preparation method of the adhesive for the plywood comprises the following steps:
adding defatted soybean protein powder, deionized water, urea and sodium carbonate into a reaction kettle according to parts by weight, slowly heating to 75 ℃, uniformly stirring, cooling to 40 ℃, and preserving heat for 110min to obtain a first mixed solution;
adding alkali into the first mixed solution, adjusting the PH value to be 10, heating to 60 ℃, and stirring for reacting for 40min to obtain a second mixed solution;
adding defatted soy protein powder, a bio-based crosslinking curing agent, deionized water and a deodorizing filler into another reaction kettle according to the parts by weight, heating to 60 ℃, and uniformly stirring to obtain a third mixed solution;
step four, adding part of the second mixed solution into part of the third mixed solution, maintaining the temperature at 60 ℃, stirring and mixing, adding phytic acid, adjusting the PH value to be 2, cooling to room temperature, standing for 30min to obtain a fourth mixed solution, and simultaneously mixing the rest of the second mixed solution with the third mixed solution to obtain a fifth mixed solution;
step five, stirring and mixing the fifth mixed solution and the fourth mixed solution, heating to 90 ℃, and standing at the temperature for 30min to obtain a sixth mixed solution;
and step six, adding the sixth mixed solution into a filtering device for filtering, and heating and concentrating to obtain the adhesive.
The first step comprises the following raw materials in parts by mass: 14 parts of defatted soybean protein powder, 45 parts of deionized water, 3 parts of urea and 1 part of sodium carbonate.
The mass portion of the alkali in the second step is as follows: 4 parts.
The third step comprises the following raw materials in parts by mass: 4 parts of defatted soy protein powder, 100 parts of bio-based crosslinking curing agent, 40 parts of deionized water and 32 parts of deodorizing filler.
The mass parts of the phytic acid in the fourth step are as follows: 10 parts.
The alkali is a mixture of sodium hydroxide and potassium hydroxide, and the mass parts ratio of the sodium hydroxide to the potassium hydroxide is as follows: 1:1.5.
In the fourth step, the second mixed liquid of 2/5 of the second mixed liquid in the second step is added into the third mixed liquid.
As shown in fig. 3-8, the equipment adopted in the first to fifth steps is double-stirring-cylinder processing equipment, the double-stirring-cylinder processing equipment comprises a base 1, a first stirring cylinder 3 is fixed on the upper side of the base 1 through a first support column 2, a second stirring cylinder 5 is fixed on the upper side of the base 1 through a second support column 4, stirring mechanisms 8 are arranged inside the first stirring cylinder 3 and the second stirring cylinder 5, the stirring mechanisms 8 comprise stirring shafts 7, the lower ends of the stirring shafts 7 extend out of the first stirring cylinder 3 and the second stirring cylinder 5, a driving cavity 9 is arranged inside the base 1, a driving mechanism is arranged inside the driving cavity 9, the stirring shafts 7 are connected with the driving mechanism, a plurality of mounting seats 29 are arranged on the stirring shafts 7, a transmission cavity 28 is arranged inside the stirring shafts 7, transmission shafts 26 are fixed on the upper ends inside the first stirring cylinder 3 and the second stirring cylinder 5, the lower ends of the transmission shafts 26 extend into the transmission cavity 28, a plurality of rotating seats 27 corresponding to the mounting seats 29 are fixed on the transmission shaft 26, a cavity 38 is formed in the rotating seat 27, a driving plate 39 is fixed in the cavity 38, a wavy surface 40 is arranged on the periphery of the driving plate 39, an annular guide groove 41 is formed on the periphery of the rotating seat 27, a first threaded rod 30 is connected in a sliding mode in the annular guide groove 41, a transverse stirring blade 31 is connected to the outer side of the mounting seat 29 in a rotating mode, a sliding cavity 32 is formed in the transverse stirring blade 31, the first threaded rod 30 is connected with the transverse stirring blade 31 in a threaded mode and extends into the sliding cavity 32, the other end of the first threaded rod 30 is located in the cavity 38 and is fixedly provided with a guide seat 42, a ball 44 is arranged on the other side of the guide seat 42 and is in contact with the wavy surface 40, a reset spring 43 is sleeved on the periphery of the first threaded rod 30, one end of the reset spring 43 is fixedly connected with the guide seat 42, the other end of the return spring 43 is in sliding connection with the cavity 38, a plurality of longitudinal stirring blades 33 are fixed on the periphery of the transverse stirring blade 31, a first temperature control cavity 34 is formed in the transverse stirring blade 31, a second temperature control cavity 35 is formed in the longitudinal stirring blade 33, the first temperature control cavity 34 is communicated with the second temperature control cavity 35, a heating component 36 and a refrigerating component 37 are arranged in the first temperature control cavity 34, a material conveying box 6 is fixed between the first stirring cylinder 3 and the second stirring cylinder 5, a piston plate 21 is slidably connected with the material conveying box 6, a second driving rod 16 is fixed on the lower side of the piston plate 21, the lower end of the second driving rod 16 extends out of the material conveying box 6 and is rotationally connected with a second driving rod 16, a transmission mechanism is arranged at the lower end of the second driving rod 16, a first bevel gear 14 is fixed on the stirring shaft 7, and the first bevel gear 14 is connected with the transmission mechanism.
With the structure, when in operation, defatted soybean protein powder, deionized water, urea and sodium carbonate are added into the first stirring barrel 3, meanwhile defatted soybean protein powder, bio-based crosslinking curing agent, deionized water and deodorizing filler are added into the second stirring barrel 5, the driving mechanism is started, the driving mechanism drives the stirring shaft 7 to rotate, the stirring shaft 7 drives the transverse stirring blade 31 and the longitudinal stirring blade 33 to stir horizontally, when the transverse stirring blade 31 rotates, under the action of the wave-shaped surface 40 and the spring in the rotating seat 27, the guide seat 42 drives the first threaded rod 30 to reciprocate, the first threaded rod 30 drives the transverse stirring blade 31 to rotate, so that the longitudinal stirring blade 33 rotates and stirs in the vertical direction, the multidirectional stirring can be realized by using the same power, and meanwhile, the heating component 36 is started to heat the solution inside the first stirring barrel 3 and the second stirring barrel 5, after the temperature in the first stirring cylinder 3 is increased to 50-100 ℃, the temperature in the second stirring cylinder 5 is increased to 40-80 ℃ by utilizing the refrigerating component 37 to cool to 35-45 ℃ after uniform stirring, the uniformity of the temperature can be improved while the stirring effect is improved, so that the quality of material reaction is ensured, after the first mixed solution is reacted, alkali is added into the first stirring cylinder 3, the temperature in the first stirring cylinder 3 is increased to 45-80 ℃ again by utilizing the heating component 36, stirring reaction is carried out, a second mixed solution is obtained, a third mixed solution is obtained in the second stirring cylinder 5, then a transmission mechanism is meshed with the first bevel gear 14, the first bevel gear 14 drives the first driving rod 15 to rotate through the transmission mechanism, the first driving rod 15 drives the piston plate 21 to reciprocate through the second driving rod 16, the first conveying pipe 17, the second conveying pipe 18, the third conveying pipe 19 and the fourth conveying pipe 20 are all provided with one-way valves, when the piston plate 21 descends, the first conveying pipe 17 pumps the third mixed liquid at the upper part of the second stirring cylinder 5 into the conveying box 6, when the piston plate 21 ascends, the third mixed liquid is conveyed to the bottom of the first stirring cylinder 3 through the fourth conveying pipe 20, meanwhile, when the piston plate 21 ascends, the second mixed liquid in the first stirring cylinder 3 is pumped into the conveying box 6 through the third conveying pipe 19, and when the piston plate 21 descends, the second mixed liquid is conveyed into the second stirring cylinder 5 through the second conveying pipe 18, and the second mixed liquid is circulated in such a way, so that part of the second mixed liquid and part of the third mixed liquid are mixed in the second stirring cylinder 5, then the transmission mechanism is separated from the first bevel gear 14, the conveying box 6 is not operated, phytic acid is added, the PH is adjusted to be 1-3, the temperature is cooled to be 20-40min, the fourth mixed liquid is obtained, and the mixed liquid is continuously stirred evenly in the second stirring cylinder 5 through the second conveying pipe 18, and the third mixed liquid is enabled to be mixed with the third mixed liquid in the second stirring cylinder 5, and the fourth mixed liquid is enabled to be mixed evenly after the fourth mixed liquid is enabled to be mixed in the second stirring cylinder 5, and the second stirring cylinder is enabled to be kept to be mixed, and the fourth mixed liquid is enabled to be mixed evenly.
The driving mechanism comprises a driving motor 10, the driving motor 10 is fixed in the driving cavity 9, a driving shaft 11 is fixed at the output shaft end of the driving motor 10, a driving chain wheel 12 is fixed on the driving shaft 11, the lower end of the stirring shaft 7 stretches into the driving cavity 9 and is fixed with a driven chain wheel 13, and the driving chain wheel 12 is connected with the driven chain wheel 13 through a chain;
the transmission mechanism comprises an electric telescopic rod 47, the electric telescopic rod 47 is fixed on the base 1, a supporting seat 46 is fixed at the upper end of the electric telescopic rod 47, a U-shaped rod 45 is rotatably connected to the supporting seat 46, second bevel gears 48 are fixed at two ends of the U-shaped rod, the second bevel gears 48 are meshed with the first bevel gears 14, a rotary sleeve is rotatably connected to the middle of the U-shaped rod 45, and the rotary sleeve is fixedly connected with the first driving rod 15.
With the above structure, when the electric stirring device works, the driving motor 10 rotates to drive the driving shaft 11 to rotate, the driving shaft 11 drives the driving chain wheel 12 to rotate, the driving chain wheel 12 drives the driven chain wheel 13 to rotate through the chain, thereby realizing the rotation of the stirring mechanism 8, not only realizing the rotation of the same motor driving two stirring mechanisms 8, but also the driving motor 10 and the stirring shaft 7 are not contacted, the influence of the temperature in the first stirring cylinder 3 and the second stirring cylinder 5 on the driving motor 10 can be reduced to a certain extent, the setting of the two transmission mechanisms, under the initial state, the first bevel gear 14 and the second bevel gear 48 are separated, the electric telescopic rod 47 drives the supporting seat 46 to rise, the supporting seat 46 drives the U-shaped rod 45 to rise, thereby enabling the first bevel gear 14 to be meshed with the second bevel gear 48, at the moment, the first bevel gear 14 drives the second bevel gear 48 to rotate, the second bevel gear 48 drives the U-shaped rod 45 to rotate, and the U-shaped rod 45 drives the first driving rod 15 and the second driving rod 16 to move through the rotating sleeve, so that the driving of the piston plate 21 is realized.
The piston plate 21 is provided with two internal thread driving seats 22, the internal thread driving seats 22 are internally connected with second threaded rods 23 in a threaded manner, rotating rods 24 are fixed at the upper end and the lower end of each second threaded rod 23, the other ends of the rotating rods 24 are rotatably connected with the material conveying box 6, a plurality of horizontal stirring blades 25 are fixed on the rotating rods 24, and the thread directions of the two second threaded rods 23 are opposite.
By adopting the structure, when the piston plate 21 moves up and down, the second threaded rod 23 can be driven to rotate positively and negatively through the internal thread driving seat 22, so that the rotary rod 24 drives the horizontal stirring blade 25 to rotate, the materials can be stirred when being conveyed, the effect of material mixing is improved, and meanwhile, the two threaded rods are opposite in direction of rotation, so that the mixing effect of the materials is further improved.
Example III
As shown in fig. 1, the preparation method of the adhesive for the plywood comprises the following steps:
adding defatted soybean protein powder, deionized water, urea and sodium carbonate into a reaction kettle according to parts by weight, slowly heating to 60 ℃, uniformly stirring, cooling to 35 ℃, and preserving heat for 150min to obtain a first mixed solution;
adding alkali into the first mixed solution, adjusting the pH to 8-11, heating to 45 ℃, and stirring for reacting for 50min to obtain a second mixed solution;
adding defatted soy protein powder, a bio-based crosslinking curing agent, deionized water and a deodorizing filler into another reaction kettle according to the parts by weight, heating to 40 ℃, and uniformly stirring to obtain a third mixed solution;
step four, adding part of the second mixed solution into part of the third mixed solution, keeping the temperature at 80 ℃, stirring and mixing, adding phytic acid, adjusting the PH to 3, cooling to room temperature, standing for 20min to obtain a fourth mixed solution, and simultaneously mixing the rest of the second mixed solution with the rest of the third mixed solution to obtain a fifth mixed solution;
step five, stirring and mixing the fifth mixed solution and the fourth mixed solution, heating to 600 ℃, and standing at the temperature for 40min to obtain a sixth mixed solution;
and step six, adding the sixth mixed solution into a filtering device for filtering, and heating and concentrating to obtain the adhesive.
The first step comprises the following raw materials in parts by mass: 10 parts of defatted soy protein powder, 65 parts of deionized water, 5 parts of urea and 0.6 part of sodium carbonate.
The mass portion of the alkali in the second step is as follows: 2 parts.
The third step comprises the following raw materials in parts by mass: 18 parts of defatted soy protein powder, 120 parts of bio-based crosslinking curing agent, 20 parts of deionized water and 40 parts of deodorizing filler.
The mass parts of the phytic acid in the fourth step are as follows: 5 parts.
The alkali is a mixture of sodium hydroxide and potassium hydroxide, and the mass parts ratio of the sodium hydroxide to the potassium hydroxide is as follows: 1:1.5.
In the fourth step, the second mixed liquid of 2/5 of the second mixed liquid in the second step is added into the third mixed liquid.
The double-stirring cylinder type processing equipment adopted in the preparation method of the adhesive in the embodiment is the same as that in the second embodiment, and the difference is that the proportion of the raw materials in the process is different.
Example IV
As shown in fig. 1, the preparation method of the adhesive for the plywood comprises the following steps:
adding defatted soybean protein powder, deionized water, urea and sodium carbonate into a reaction kettle according to parts by weight, slowly heating to 100 ℃, uniformly stirring, cooling to 45 ℃, and preserving heat for 140 minutes to obtain a first mixed solution;
adding alkali into the first mixed solution, adjusting the PH value to be 11, heating to 50 ℃, and stirring for reacting for 48min to obtain a second mixed solution;
adding defatted soy protein powder, a bio-based crosslinking curing agent, deionized water and a deodorizing filler into another reaction kettle according to the parts by weight, heating to 70 ℃, and uniformly stirring to obtain a third mixed solution;
step four, adding part of the second mixed solution into part of the third mixed solution, maintaining the temperature at 70 ℃, stirring and mixing, adding phytic acid, adjusting the PH to be 1, cooling to room temperature, standing for 25min to obtain a fourth mixed solution, and simultaneously mixing the rest of the second mixed solution with the rest of the third mixed solution to obtain a fifth mixed solution;
step five, stirring and mixing the fifth mixed solution and the fourth mixed solution, heating to 65 ℃, and standing at the temperature for 25min to obtain a sixth mixed solution;
and step six, adding the sixth mixed solution into a filtering device for filtering, and heating and concentrating to obtain the adhesive.
The first step comprises the following raw materials in parts by mass: 11 parts of defatted soy protein powder, 60 parts of deionized water, 2 parts of urea and 1.3 parts of sodium carbonate.
The mass portion of the alkali in the second step is as follows: 6 parts.
The third step comprises the following raw materials in parts by mass: 12 parts of defatted soy protein powder, 85 parts of bio-based crosslinking curing agent, 30 parts of deionized water and 38 parts of deodorizing filler.
The mass parts of the phytic acid in the fourth step are as follows: 13 parts.
The alkali is a mixture of sodium hydroxide and potassium hydroxide, and the mass parts ratio of the sodium hydroxide to the potassium hydroxide is as follows: 1:1.5.
In the fourth step, the second mixed liquid of 2/5 of the second mixed liquid in the second step is added into the third mixed liquid.
The double-stirring cylinder type processing equipment adopted in the preparation method of the adhesive in the embodiment is the same as that in the second embodiment, and the difference is that the proportion of the raw materials in the process is different.
Experimental example
And (3) performing a bonding strength test: and (3) respectively coating the adhesive prepared in the examples 1-4 with the same adhesive amount on 2 sides of the single board to obtain a glued single board, vertically and respectively placing the non-glued single board on two sides of the glued single board according to wood grains, then placing the single board in a closed state for 20min at room temperature, finally pressing the single board into a three-layer plywood at 160 ℃ and 1.8MPa, and placing the three-layer plywood at room temperature for 2 days to obtain the plywood. Type II wet shear strength test plywood test pieces were soaked in tap water at 50 ℃ for 3 hours and then cooled at room temperature for 20min before the test. Plywood samples for type I wet shear strength (aged bond strength) were subjected to 30h boiling-dry-boiling damp heat treatment (5 h boiling, 70 ℃ C. Oven-dried, 5h boiling) and then cooled at room temperature for 15min before testing. Three glue strengths of each group of plywood were tested according to the method of GB/T9846-2015, each glue strength test taking the average of the glue strengths of 30 parallel samples. The detection results are shown in the following table:
according to the test data in the table, the preparation equipment of the first to fifth steps is different from the preparation equipment of the second step, and the dry bonding strength, the II-type wet bonding strength and the I-type wet dry bonding strength of the adhesive prepared in the second step are obviously higher than those of the first step, so that the bonding strength of the adhesive can be comprehensively improved by using the double-stirring cylinder type processing equipment.
Compared with the embodiment III, the embodiment IV and the embodiment II, the embodiment III and the embodiment IV have different proportions of raw materials and different processing conditions, the equipment used in the production steps is the same, and the dry bonding strength, the II-type wet bonding strength and the I-type wet dry bonding strength of the adhesive prepared in the embodiment III and the embodiment IV are lower than those of the adhesive prepared in the embodiment II, so that the processing conditions are different and influence on the bonding strength of the adhesive.
The preparation method of the adhesive for the plywood has reasonable formula and scientific process, can lead materials in all components to fully react, can lead the performances of all components to fully play, can reduce impurities in the adhesive, improves the purity of the adhesive, greatly improves the bonding strength of the adhesive, and can adsorb peculiar smell such as formaldehyde and reduce the pollution to the environment by adding the deodorizing filler into the adhesive.
The double-stirring cylinder type processing equipment can be used for carrying out separate mixing reaction on raw materials, improving the processing efficiency, gradually mixing the second mixed solution and the third mixed solution, gradually mixing the fifth mixed solution and the fourth mixed solution, improving the mixing uniformity, and completely reacting the mixed solutions, thereby improving the utilization rate of each component to a certain extent and ensuring the bonding strength.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (9)
1. The preparation method of the adhesive for the plywood is characterized by comprising the following steps of:
firstly, adding defatted soybean protein powder, deionized water, urea and sodium carbonate into a reaction kettle according to parts by weight, slowly heating to 50-100 ℃, uniformly stirring, cooling to 35-45 ℃, and preserving heat for 80-150min to obtain a first mixed solution;
adding alkali into the first mixed solution, adjusting the pH to 8-11, heating to 45-80 ℃, and stirring for reaction for 30-50min to obtain a second mixed solution;
adding defatted soy protein powder, a bio-based crosslinking curing agent, deionized water and a deodorizing filler into another reaction kettle according to the parts by weight, heating to 40-80 ℃, and uniformly stirring to obtain a third mixed solution;
step four, adding part of the second mixed solution into part of the third mixed solution, keeping the temperature at 40-80 ℃, stirring and mixing, adding phytic acid, adjusting the PH to 1-3, cooling to room temperature, standing for 20-40min to obtain fourth mixed solution, and simultaneously mixing the rest of the second mixed solution with the rest of the third mixed solution to obtain fifth mixed solution;
step five, stirring and mixing the fifth mixed solution and the fourth mixed solution, heating to 60-120 ℃, and keeping the temperature for 20-40min to obtain a sixth mixed solution;
step six, adding the sixth mixed solution into a filtering device for filtering, and heating and concentrating to obtain the adhesive;
the equipment adopted in the first to fifth steps is double-stirring cylinder type processing equipment, the double-stirring cylinder type processing equipment comprises a base (1), a first stirring cylinder (3) is fixed on the upper side of the base (1) through a first support column (2), a second stirring cylinder (5) is fixed on the upper side of the base (1) through a second support column (4), stirring mechanisms (8) are arranged in the first stirring cylinder (3) and the second stirring cylinder (5), the stirring mechanisms (8) comprise stirring shafts (7), the lower ends of the stirring shafts (7) extend out of the first stirring cylinder (3) and the second stirring cylinder (5), a driving cavity (9) is formed in the base (1), a driving mechanism is arranged in the driving cavity (9), the stirring shafts (7) are connected with the driving mechanism, a plurality of mounting seats (29) are arranged on the stirring shafts (7), transmission cavities (28) are formed in the inner parts of the stirring shafts (7), transmission shafts (26) are fixed on the inner upper ends of the first stirring cylinder (3) and the second stirring cylinder (5), transmission shafts (26) are fixedly provided with transmission shafts (26), the lower ends of the transmission shafts (26) extend out of the transmission shafts (27) and are fixedly provided with corresponding rotation cavities (38) in the rotation cavities (27), the periphery of the driving plate (39) is provided with a wavy surface (40), the periphery of the rotating seat (27) is provided with an annular guide groove (41), the annular guide groove (41) is internally and slidably connected with a first threaded rod (30), the outer side of the mounting seat (29) is rotatably connected with a transverse stirring blade (31), the inside of the transverse stirring blade (31) is provided with a sliding cavity (32), the first threaded rod (30) is in threaded connection with the transverse stirring blade (31) and extends into the sliding cavity (32), the other end of the first threaded rod (30) is positioned in the cavity (38) and is fixedly provided with a guide seat (42), the other side of the guide seat (42) is provided with a ball (44), the ball (44) is in contact with the wavy surface (40), one end of the first threaded rod (30) is fixedly connected with the guide seat (42), the other end of the return spring (43) is in sliding connection with the cavity (38), the periphery of the transverse stirring blade (31) is fixedly provided with a plurality of longitudinal stirring blades (33), the inside of the transverse stirring blade (31) is provided with a first temperature control cavity (34), the second temperature control cavity (35) is communicated with the first temperature control cavity (35), be provided with heating element (36) and refrigeration subassembly (37) in first control by temperature change chamber (34), be fixed with defeated workbin (6) between first churn (3) and second churn (5), the sliding connection of defeated workbin (6) has piston board (21), the downside of piston board (21) is fixed with second actuating lever (16), the lower extreme of second actuating lever (16) stretches out defeated workbin (6) and rotates and be connected with second actuating lever (16), the lower extreme of second actuating lever (16) is provided with drive mechanism, be fixed with first bevel gear (14) on (7) the (mixing) shaft, first bevel gear (14) are connected with drive mechanism.
2. The method for preparing the adhesive for plywood according to claim 1, wherein the weight portions of the raw materials in the first step are as follows: 10-18 parts of defatted soy protein powder, 30-65 parts of deionized water, 1-5 parts of urea and 0.6-1.5 parts of sodium carbonate.
3. The method for preparing the adhesive for plywood according to claim 1, wherein the alkali in the second step is in parts by weight: 2-7 parts.
4. The method for preparing the adhesive for plywood according to claim 1, wherein the mass parts of the raw materials in the third step are as follows: 10-18 parts of defatted soy protein powder, 80-120 parts of bio-based crosslinking curing agent, 20-60 parts of deionized water and 25-40 parts of deodorizing filler.
5. The method for preparing the adhesive for plywood according to claim 1, wherein the mass parts of the phytic acid in the fourth step are as follows: 5-15 parts.
6. The preparation method of the adhesive for the plywood, according to claim 1, is characterized in that the alkali is a mixture of sodium hydroxide and potassium hydroxide, and the mass ratio of the sodium hydroxide to the potassium hydroxide is as follows: 1:1.5.
7. The method of producing an adhesive for plywood according to claim 1, wherein in the fourth step, the second mixed liquid of 2/5 of the second mixed liquid in the second step is added to the third mixed liquid.
8. The preparation method of the adhesive for the plywood, according to claim 1, characterized in that the driving mechanism comprises a driving motor (10), the driving motor (10) is fixed in a driving cavity (9), a driving shaft (11) is fixed at the output shaft end of the driving motor (10), a driving chain wheel (12) is fixed on the driving shaft (11), the lower end of the stirring shaft (7) stretches into the driving cavity (9) and is fixed with a driven chain wheel (13), and the driving chain wheel (12) is connected with the driven chain wheel (13) through a chain; the transmission mechanism comprises an electric telescopic rod (47), the electric telescopic rod (47) is fixed on a base (1), a supporting seat (46) is fixed at the upper end of the electric telescopic rod (47), a U-shaped rod (45) is rotatably connected to the supporting seat (46), second bevel gears (48) are fixed at two ends of the U-shaped rod, the second bevel gears (48) are meshed with the first bevel gears (14), a rotary sleeve (49) is rotatably connected to the middle of the U-shaped rod (45), and the rotary sleeve (49) is fixedly connected with the first driving rod (15).
9. The method for preparing the adhesive for the plywood according to claim 1, wherein two internal thread driving seats (22) are arranged on the piston plate (21), second threaded rods (23) are connected with the internal threads of the internal thread driving seats (22), rotating rods (24) are fixed at the upper end and the lower end of each second threaded rod (23), the other end of each rotating rod (24) is in rotary connection with the material conveying box (6), a plurality of horizontal stirring blades (25) are fixed on each rotating rod (24), and the directions of the threads of the two second threaded rods (23) are opposite.
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| WO2010065758A2 (en) * | 2008-12-03 | 2010-06-10 | State Of Oregon Acting By And Through The State Board Of Higher Educ. On Behalf Of Oregon State Univ | Soy adhesives |
| CN107903871A (en) * | 2017-11-28 | 2018-04-13 | 黄桂凤 | A kind of soybean albumen adhesive and preparation method thereof |
| WO2020052116A1 (en) * | 2018-09-14 | 2020-03-19 | 江南大学 | Thermosetting starch adhesive for man-made board, and manufacturing method therefor |
| CN113480970A (en) * | 2021-07-19 | 2021-10-08 | 华南农业大学 | Full-bio-based bi-component soybean adhesive, preparation method and application thereof |
| CN215877560U (en) * | 2021-08-31 | 2022-02-22 | 南京天双辰新材料有限公司 | Efficient dispersing and stirring equipment for processing organosilicon adhesive sealant |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010065758A2 (en) * | 2008-12-03 | 2010-06-10 | State Of Oregon Acting By And Through The State Board Of Higher Educ. On Behalf Of Oregon State Univ | Soy adhesives |
| CN107903871A (en) * | 2017-11-28 | 2018-04-13 | 黄桂凤 | A kind of soybean albumen adhesive and preparation method thereof |
| WO2020052116A1 (en) * | 2018-09-14 | 2020-03-19 | 江南大学 | Thermosetting starch adhesive for man-made board, and manufacturing method therefor |
| CN113480970A (en) * | 2021-07-19 | 2021-10-08 | 华南农业大学 | Full-bio-based bi-component soybean adhesive, preparation method and application thereof |
| CN215877560U (en) * | 2021-08-31 | 2022-02-22 | 南京天双辰新材料有限公司 | Efficient dispersing and stirring equipment for processing organosilicon adhesive sealant |
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