CN115368854A - Formaldehyde-free environment-friendly wood adhesive and preparation method thereof - Google Patents
Formaldehyde-free environment-friendly wood adhesive and preparation method thereof Download PDFInfo
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- CN115368854A CN115368854A CN202211099906.4A CN202211099906A CN115368854A CN 115368854 A CN115368854 A CN 115368854A CN 202211099906 A CN202211099906 A CN 202211099906A CN 115368854 A CN115368854 A CN 115368854A
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- 239000000853 adhesive Substances 0.000 title claims abstract description 36
- 230000001070 adhesive effect Effects 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 239000002023 wood Substances 0.000 title claims abstract description 19
- 238000006243 chemical reaction Methods 0.000 claims abstract description 72
- 238000002156 mixing Methods 0.000 claims abstract description 39
- 239000002994 raw material Substances 0.000 claims abstract description 35
- 238000003756 stirring Methods 0.000 claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 19
- 229920002689 polyvinyl acetate Polymers 0.000 claims abstract description 10
- 239000011118 polyvinyl acetate Substances 0.000 claims abstract description 10
- 229920000178 Acrylic resin Polymers 0.000 claims abstract description 7
- 239000004925 Acrylic resin Substances 0.000 claims abstract description 7
- HDERJYVLTPVNRI-UHFFFAOYSA-N ethene;ethenyl acetate Chemical group C=C.CC(=O)OC=C HDERJYVLTPVNRI-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229920001038 ethylene copolymer Polymers 0.000 claims abstract description 7
- 229920005989 resin Polymers 0.000 claims abstract description 7
- 239000011347 resin Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 13
- URAYPUMNDPQOKB-UHFFFAOYSA-N triacetin Chemical compound CC(=O)OCC(OC(C)=O)COC(C)=O URAYPUMNDPQOKB-UHFFFAOYSA-N 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 11
- 239000003999 initiator Substances 0.000 claims description 9
- 230000000149 penetrating effect Effects 0.000 claims description 9
- 229910021642 ultra pure water Inorganic materials 0.000 claims description 9
- 239000012498 ultrapure water Substances 0.000 claims description 9
- 238000005485 electric heating Methods 0.000 claims description 8
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 claims description 7
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 7
- -1 carbonyl allyl ester Chemical class 0.000 claims description 7
- 229910052731 fluorine Inorganic materials 0.000 claims description 7
- 239000011737 fluorine Substances 0.000 claims description 7
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 claims description 7
- 239000003995 emulsifying agent Substances 0.000 claims description 6
- 235000013773 glyceryl triacetate Nutrition 0.000 claims description 6
- 239000011259 mixed solution Substances 0.000 claims description 6
- 229960002622 triacetin Drugs 0.000 claims description 6
- 230000017525 heat dissipation Effects 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 3
- 230000000977 initiatory effect Effects 0.000 claims description 3
- STCOOQWBFONSKY-UHFFFAOYSA-N tributyl phosphate Chemical compound CCCCOP(=O)(OCCCC)OCCCC STCOOQWBFONSKY-UHFFFAOYSA-N 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 30
- 230000008878 coupling Effects 0.000 abstract description 2
- 238000010168 coupling process Methods 0.000 abstract description 2
- 238000005859 coupling reaction Methods 0.000 abstract description 2
- 230000003031 feeding effect Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009967 tasteless effect Effects 0.000 description 1
Images
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
- C09J151/00—Adhesives based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers
- C09J151/003—Adhesives based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers grafted on to macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0053—Details of the reactor
- B01J19/0066—Stirrers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/28—Moving reactors, e.g. rotary drums
-
- 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
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Abstract
The invention discloses an aldehyde-free environment-friendly wood adhesive and a preparation method thereof, wherein the adhesive comprises the following raw materials in parts by weight: 20-45 parts of polyvinyl acetate; 1-3 parts of acrylic resin; 1-4 parts of vinyl acetate-ethylene copolymer resin; drive the pivot through servo motor and rotate, the pivot is rotatable on the chassis lateral wall, and simultaneously, receive external drive power effect and rotate when reaction vessel is interior in the pivot, can drive the helical blade rotation of rigid coupling in the pivot, utilize the helical blade of two-way arrangement, when stirring the inside raw and other materials of mixing vessel, can drive the interior raw and other materials of reaction vessel and overturn the stirring in reaction vessel, thereby can improve the stirring effect of raw and other materials in reaction vessel, and through transversely arranging helical blade, can improve the area of contact of helical blade and raw and other materials, and then further improvement is to the stirring effect of raw and other materials.
Description
Technical Field
The invention relates to the technical field of adhesive preparation, in particular to an aldehyde-free environment-friendly wood adhesive and a preparation method thereof.
Background
An adhesive is a substance that can join two or more materials together by adhesion and cohesion and is generally referred to as an adhesive or cohesive.
The traditional adhesive for bonding wood generally contains polyvinyl acetate as an internal component, and the polyvinyl acetate is an adhesive widely applied to the fields of building coatings, wood bonding and paper processing, is relatively simple to prepare, is nontoxic, tasteless and colorless, and has a good bonding effect.
When the adhesive is prepared, various raw materials contained in adhesive preparation components are generally required to be sequentially added into a reaction kettle for uniformly mixing according to preparation process steps, meanwhile, a certain heating effect may need to be provided for part of the raw materials to assist the raw materials to melt, but in the existing processing technology, a simple reaction kettle is matched with a stirring device rotating in the reaction kettle, and because the raw materials have certain viscosity in the mixing process, the raw materials in the reaction kettle are stirred a little insufficiently, and meanwhile, in the traditional reaction kettle, the stirring device cannot touch the bottom of the reaction kettle, so that the raw materials at the bottom of the reaction kettle are relatively poor in stirring effect by the stirring device, and thus, the produced adhesive has variation.
Therefore, the formaldehyde-free environment-friendly wood adhesive and the preparation method thereof are provided for solving the problems.
Disclosure of Invention
In order to make up for the defects of the prior art and solve at least one problem, the invention provides an aldehyde-free environment-friendly wood adhesive and a preparation method thereof.
The formaldehyde-free environment-friendly wood adhesive comprises the following raw materials in parts by weight:
20-45 parts of polyvinyl acetate;
1-3 parts of acrylic resin;
1-4 parts of vinyl acetate-ethylene copolymer resin;
5-15 parts of modified PVA;
5-15 parts of carbonyl allyl ester;
1-5 parts of fluorine-containing ethyl acrylate;
1-3 parts of an emulsifier;
0.4-3 parts of an initiator;
8-32 parts of ultrapure water;
1.5-3 parts of tributyl phosphate;
2-5 parts of glycerol triacetate.
Preferably, the polyvinyl acetate, the carbonyl allyl ester, and the fluorine-containing ethyl acrylate are mixed in parts by weight before being charged into the reaction vessel to form a mixed solution.
A preparation method of an aldehyde-free environment-friendly wood adhesive comprises the following steps:
step S1: adding the modified PVA and ultrapure water into a reaction vessel, and heating to completely dissolve the modified PVA and the ultrapure water;
step S2: adding an emulsifier, and reducing the temperature in the reaction vessel to be within the range of 50-85 ℃;
and step S3: adding vinyl acetate-ethylene copolymer resin and acrylic resin, and continuously stirring to uniformly stir;
and step S4: adding half amount of initiator, and slowly dripping the mixed solution and the rest of initiator after initiating for half an hour;
step S5: heating the temperature in the reaction container to 85-105 ℃, and continuing to react for 0.5-2.5h to ensure that the materials are fully mixed in the same industry;
step S6: cooling the reaction vessel to below 50 ℃, adding glycerol triacetate, stirring uniformly, and blanking.
Preferably, in the step S1, bottom frames are arranged at two ends of the reaction vessel, and the bottom frames are fixed on the ground; supporting plates are fixedly connected to two sides of the underframe; the middle part of the reaction vessel is connected with a rotating shaft in a penetrating way, and two ends of the rotating shaft are respectively connected with two ends of the underframe in a penetrating way; the middle part of the rotating shaft is fixedly connected with a helical blade, and the helical blade is arranged in the reaction container.
Preferably, the reaction vessel comprises a mixing vessel and a hopper; the hopper is fixedly connected to one end of the mixing container; a first gear is fixedly connected to both sides of the mixing container; the rotating shaft and the first gear are coaxial.
Preferably, four groups of connecting sleeves are fixedly connected to the top of the hopper; a filter plate is movably connected inside the hopper, and four corners of the filter plate are fixedly connected with spring rods corresponding to the connecting sleeves; the other end of the spring rod, which is far away from the filter plate, penetrates through the connecting sleeve.
Preferably, a supporting plate at one side of the reaction container is fixedly connected with a fixing frame, and a servo motor is fixedly connected in the fixing frame; the output end of the servo motor is clamped with the end part of the rotating shaft; one end of the rotating shaft close to the servo motor is fixedly connected with a connecting gear, the bottom of the underframe is fixedly connected with a duplicate gear corresponding to the connecting gear, and the middle part of the duplicate gear is connected to the supporting plate in a sliding manner; the duplicate gear is movably meshed with the connecting gear and the first gear.
Preferably, a scraper is fixedly connected to the part of the rotating shaft, which is positioned in the mixing container, and the scraper is arranged in a U-shaped structure; the electric heating pipe is connected to one end, far away from the servo motor, of the rotating shaft in a penetrating mode, a plurality of groups of radiating holes are formed in the portion, located in the mixing container, of the rotating shaft, and the plurality of groups of radiating holes are arranged symmetrically on the circumference.
The invention has the advantages that:
1. the invention drives the rotating shaft to rotate through the servo motor, the rotating shaft can rotate on the side wall of the bottom frame, and simultaneously, when the rotating shaft is driven by an external driving force to rotate in the reaction container, the spiral blade fixedly connected to the rotating shaft can be driven to rotate, and by utilizing the spiral blades arranged in two directions, when the raw materials in the mixing container are stirred, the raw materials in the reaction container can be driven to be overturned and stirred in the reaction container, so that the stirring effect of the raw materials in the reaction container can be improved, and the contact area of the spiral blades and the raw materials can be improved through the spiral blades arranged in the transverse direction, thereby further improving the stirring effect of the raw materials.
2. According to the invention, the movement of the duplicate gear on the bottom frame is manually controlled, so that the duplicate gear can be meshed with the connecting gear, and at the moment, the duplicate gear can rotate under the driving of the servo motor, and further, the first gear meshed with the other end of the duplicate gear is driven to rotate, so that the mixing container and the hopper can be driven to rotate under the driving of the servo motor, the hopper is enabled to change from a feeding effect to a blanking effect, and the effects of two working environments of one hopper are achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive labor.
FIG. 1 is a perspective view of one embodiment of the present invention;
FIG. 2 is a first cross-sectional perspective view of one embodiment of the present invention;
FIG. 3 is an enlarged view of the portion A of FIG. 2;
FIG. 4 is a second cross-sectional perspective view of an embodiment of the present invention;
FIG. 5 is a front view of one embodiment of the present invention;
in the figure: 1. a chassis; 11. a support plate; 21. a mixing vessel; 22. a hopper; 23. a first gear; 24. filtering the plate; 25. connecting a sleeve; 26. a spring lever; 27. a helical blade; 28. a squeegee; 31. a fixed mount; 32. a servo motor; 33. a rotating shaft; 34. a connecting gear; 35. a duplicate gear; 36. an electric heating tube; 37. and (4) heat dissipation holes.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, the adhesive comprises the following raw materials in parts by weight:
35 parts of polyvinyl acetate;
2 parts of acrylic resin;
2 parts of vinyl acetate-ethylene copolymer resin;
10 parts of modified PVA;
10 parts of carbonyl allyl ester;
2 parts of fluorine-containing ethyl acrylate;
2 parts of an emulsifier;
1 part of an initiator;
28 parts of ultrapure water;
3 parts of tributyl phosphate;
and 5 parts of glycerol triacetate.
In one embodiment of the present invention, the polyvinyl acetate, the carbonyl allyl ester, and the fluorine-containing ethyl acrylate are mixed in parts by weight before they are charged into the reaction vessel to form a mixed solution.
A preparation method of an aldehyde-free environment-friendly wood adhesive comprises the following steps:
step S1: adding the modified PVA and ultrapure water into a reaction vessel, and heating to completely dissolve the modified PVA and the ultrapure water;
step S2: adding an emulsifier, and reducing the temperature in the reaction vessel to be within the range of 50-85 ℃;
and step S3: adding vinyl acetate-ethylene copolymer resin and acrylic resin, and continuously stirring to uniformly stir;
and step S4: adding half amount of initiator, and slowly dripping the mixed solution and the rest of initiator after initiating for half an hour;
step S5: heating the temperature in the reaction vessel to 85-105 ℃, and continuing to react for 0.5-2.5h to fully mix the materials in the same industry;
step S6: cooling the reaction vessel to below 50 ℃, adding glycerol triacetate, stirring uniformly, and blanking.
In the step S1, the bottom frames 1 are disposed at two ends of the reaction vessel, and the bottom frames 1 are fixed on the ground; two sides of the underframe 1 are fixedly connected with supporting plates 11; the middle part of the reaction vessel is connected with a rotating shaft 33 in a penetrating way, and two ends of the rotating shaft 33 are respectively connected with two ends of the underframe 1 in a penetrating way; the middle part of the rotating shaft 33 is fixedly connected with a helical blade 27, and the helical blade 27 is arranged in the reaction vessel.
When the adhesive is used, various raw materials contained in adhesive preparation components are generally required to be sequentially added into a reaction kettle according to preparation process steps for uniformly mixing, meanwhile, a certain heating effect may be required to be provided for part of the raw materials to assist the raw materials to be melted, but in the existing processing technology, a simple reaction kettle is matched with stirring equipment rotating in the reaction kettle, and the raw materials have certain viscosity in the mixing process, so that the raw materials in the reaction kettle are stirred slightly insufficiently, and meanwhile, in the traditional reaction kettle, the stirring equipment cannot touch the bottom of the reaction kettle, so that the raw materials at the bottom of the reaction kettle are relatively poor in stirring effect of the stirring equipment, and thus, the produced adhesives have different effects;
when the adhesive is prepared, firstly, according to the steps in the preparation scheme, raw materials are sequentially added into a reaction container, the bottom frame 1 is utilized to limit the position of the reaction container, meanwhile, the side wall of the bottom frame 1 is utilized to support the rotating shaft 33, when an external driving device drives the rotating shaft 33 to rotate, the rotating shaft 33 can rotate on the side wall of the bottom frame 1, meanwhile, when the rotating shaft 33 is driven by an external driving force to rotate in the reaction container, the spiral blade 27 fixedly connected to the rotating shaft 33 can be driven to rotate, and then the spiral blade 27 can be utilized to drive the raw materials in the reaction container to be overturned and stirred in the reaction container, so that the stirring effect of the raw materials in the reaction container can be improved.
As an embodiment of the present invention, the reaction vessel includes a mixing vessel 21 and a hopper 22; the hopper 22 is fixedly connected to one end of the mixing container 21; a first gear 23 is fixedly connected to both sides of the mixing container 21; the rotating shaft 33 and the first gear 23 are coaxial.
During operation, blending container 21 and hopper 22 are through bolt fastening, and hopper 22 can regard as simultaneously feeding and unloading to use, and after the raw and other materials stirring in blending container 21 was accomplished, utilize external drive device to drive blending container 21 upset, can change the hopper 22 that originally played the feeding effect into the hopper 22 that plays the unloading effect, realize this blending container 21 and hopper 22's upset effect through a gear 23, and pivot 33 runs through the middle part at a gear 23.
As an embodiment of the present invention, four sets of connecting sleeves 25 are fixed on the top of the hopper 22; a filter plate 24 is movably connected inside the hopper 22, and spring rods 26 are fixedly connected to four corners of the filter plate 24 corresponding to the connecting sleeves 25; the other end of the spring rod 26, which is remote from the filter plate 24, extends through the connection sleeve 25.
When the blanking device works, the filter plate 24 is movably connected with the hopper 22, when the hopper 22 plays a blanking effect, the uniformly mixed raw materials are extruded on the filter plate 24, so that the filter plate 24 moves downwards, a certain buffering effect is played on the movement of the filter plate 24 by utilizing the spring rod 26 fixedly connected with the filter plate 24, and when the filter plate 24 moves, the spring rod 26 moves in the connecting sleeve 25.
As an embodiment of the present invention, a fixing frame 31 is fixedly connected to one side support plate 11 of the reaction vessel, and a servo motor 32 is fixedly connected in the fixing frame 31; the output end of the servo motor 32 is clamped with the end part of the rotating shaft 33; a connecting gear 34 is fixedly connected to one end of the rotating shaft 33 close to the servo motor 32, a duplicate gear 35 is fixedly connected to the bottom of the underframe 1 corresponding to the connecting gear 34, and the middle part of the duplicate gear 35 is slidably connected to the support plate 11; the duplicate gear 35 is movably meshed with the connecting gear 34 and the first gear 23.
In operation, be located rigid coupling mount 31 on the backup pad 11 of reaction vessel one side, utilize mount 31 to fix servo motor 32, and simultaneously, servo motor 32 during operation, can drive pivot 33 and rotate, make pivot 33 can drive its inside helical blade 27 and rotate, and then realize the mixing effect to the inside raw and other materials of hybrid container 21, the cooperation is close to the connecting gear 34 that sets up in servo motor 32 one end at pivot 33, remove on chassis 1 through artificial control duplicate gear 35, make duplicate gear 35 can with connecting gear 34 meshing, duplicate gear 35 can produce the rotation under servo motor 32's drive this moment, and then drive and duplicate gear 35 other end meshing's one number gear 23 rotate, thereby can be under servo motor 32's drive, can drive hybrid container 21 and hopper 22 and rotate, make hopper 22 change into by playing the feeding effect and play the unloading effect, thereby play the effect of two kinds of operational environment of a hopper 22.
In one embodiment of the present invention, a scraper 28 is fixed to a portion of the rotating shaft 33 located inside the mixing container 21, and the scraper 28 is arranged in a "U" shape; one end of the rotating shaft 33, which is far away from the servo motor 32, is connected with an electric heating pipe 36 in a penetrating manner, and a plurality of groups of heat dissipation holes 37 are formed in the part of the rotating shaft 33, which is located in the mixing container 21, and the plurality of groups of heat dissipation holes 37 are circumferentially and symmetrically arranged.
The during operation, when pivot 33 rotates, scraper blade 28 that is located pivot 33 can rotate along with pivot 33, thereby drive the smooth removal of scraper blade 28 in mixing container 21's inner wall, the scraper blade 28 activity in-process, can utilize the blade of its one side to strike off mixing container 21's inner wall, and then make the thick raw and other materials of adhesion on the inner wall can be struck off, arrange simultaneously that the electric heating wire inside in pivot 33 can play the heating effect to raw and other materials in mixing container 21, and the louvre 37 of seting up on the pivot 33 can go out electric heating wire's heat transfer, the louvre 37 of slope arrangement avoids raw and other materials to get into in the inside cavity of pivot 33 to a certain extent.
The working principle is as follows: when the adhesive is prepared, various raw materials contained in the adhesive preparation components are generally required to be sequentially added into a reaction kettle for uniformly mixing according to preparation process steps, meanwhile, a certain heating effect may be required to be provided for part of the raw materials to assist the raw materials to be melted, but in the existing processing technology, a simple reaction kettle is matched with a stirring device rotating in the reaction kettle, and the raw materials have certain viscosity in the mixing process, so that the raw materials in the reaction kettle are stirred slightly insufficiently, and meanwhile, in the traditional reaction kettle, the stirring device cannot touch the bottom of the reaction kettle, so that the raw materials at the bottom of the reaction kettle are relatively poor in stirring effect by the stirring device, and thus, the produced adhesive has a parameter difference;
when the adhesive is prepared, firstly, according to the steps in the preparation scheme, raw materials are sequentially added into a reaction container, the bottom frame 1 is utilized to limit the position of the reaction container, meanwhile, the side wall of the bottom frame 1 is utilized to support the rotating shaft 33, when an external driving device drives the rotating shaft 33 to rotate, the rotating shaft 33 can rotate on the side wall of the bottom frame 1, meanwhile, when the rotating shaft 33 rotates in the reaction container under the action of an external driving force, the spiral blade 27 fixedly connected to the rotating shaft 33 can be driven to rotate, and then the spiral blade 27 can be utilized to drive the raw materials in the reaction container to be overturned and stirred in the reaction container, so that the stirring effect of the raw materials in the reaction container can be improved;
the servo motor 32 is fixed by the fixing frame 31, meanwhile, when the servo motor 32 works, the rotating shaft 33 can be driven to rotate, so that the rotating shaft 33 can drive the helical blade 27 inside the rotating shaft to rotate, and further, the uniform mixing effect of raw materials inside the mixing container 21 is realized, the connecting gear 34 arranged at one end, close to the servo motor 32, of the rotating shaft 33 is matched, the duplicate gear 35 is manually controlled to move on the chassis 1, so that the duplicate gear 35 can be meshed with the connecting gear 34, at the moment, the duplicate gear 35 can rotate under the driving of the servo motor 32, and further, the first gear 23 meshed with the other end of the duplicate gear 35 is driven to rotate, so that the mixing container 21 and the hopper 22 can be driven to rotate under the driving of the servo motor 32, the hopper 22 can be changed from the feeding effect to the blanking effect, and the effect of two working environments of one hopper 22 is achieved;
simultaneously, when pivot 33 rotates, scraper blade 28 that is located on pivot 33 can rotate along with pivot 33, thereby drive the smooth removal of scraper blade 28 in mixing container 21's inner wall, scraper blade 28 activity in-process, can utilize the blade of its one side to strike off mixing container 21's inner wall, and then make the thick raw and other materials of adhesion on the inner wall can be struck off, arrange simultaneously that the electric heating wire inside in pivot 33 can play the heating effect to raw and other materials in mixing container 21, and the louvre 37 of seting up on the pivot 33 can go out electric heating wire's heat transfer, the louvre 37 of slope arrangement avoids to a certain extent raw and other materials to get into in the inside cavity of pivot 33.
In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing shows and describes the general principles, principal features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, and such changes and modifications are within the scope of the invention as claimed.
Claims (8)
1. An aldehyde-free environment-friendly wood adhesive is characterized in that: the adhesive comprises the following raw materials in parts by weight:
20-45 parts of polyvinyl acetate;
1-3 parts of acrylic resin;
1-4 parts of vinyl acetate-ethylene copolymer resin;
5-15 parts of modified PVA;
5-15 parts of carbonyl allyl ester;
1-5 parts of fluorine-containing ethyl acrylate;
1-3 parts of an emulsifier;
0.4-3 parts of an initiator;
8-32 parts of ultrapure water;
1.5-3 parts of tributyl phosphate;
2-5 parts of glycerol triacetate.
2. The aldehyde-free environment-friendly wood adhesive according to claim 1, characterized in that: before the polyvinyl acetate, the carbonyl allyl ester and the fluorine-containing ethyl acrylate are added into the reaction vessel, the polyvinyl acetate, the carbonyl allyl ester and the fluorine-containing ethyl acrylate are mixed according to the parts by weight to form a mixed solution.
3. The preparation method of the formaldehyde-free environment-friendly wood adhesive is characterized by comprising the following steps: the preparation method comprises the following steps:
step S1: adding the modified PVA and ultrapure water into a reaction vessel, and heating to completely dissolve the modified PVA and the ultrapure water;
step S2: adding an emulsifier, and reducing the temperature in the reaction vessel to be within the range of 50-85 ℃;
and step S3: adding vinyl acetate-ethylene copolymer resin and acrylic resin, and continuously stirring to uniformly stir;
and step S4: adding half amount of initiator, and slowly dripping the mixed solution and the rest initiator after initiating for half an hour;
step S5: heating the temperature in the reaction container to 85-105 ℃, and continuing to react for 0.5-2.5h to ensure that the materials are fully mixed in the same industry;
step S6: cooling the reaction vessel to below 50 ℃, adding glycerol triacetate, stirring uniformly, and blanking.
4. The preparation method of the aldehyde-free environment-friendly wood adhesive according to claim 3, characterized in that: in the step S1, the two ends of the reaction container are provided with the bottom frames (1), and the bottom frames (1) are fixed on the ground; supporting plates (11) are fixedly connected to two sides of the underframe (1); the middle part of the reaction container is connected with a rotating shaft (33) in a penetrating way, and two ends of the rotating shaft (33) are respectively connected with two ends of the underframe (1) in a penetrating way; the middle part of the rotating shaft (33) is fixedly connected with a helical blade (27), and the helical blade (27) is arranged in the reaction vessel.
5. The method for preparing the aldehyde-free environment-friendly wood adhesive according to claim 4, wherein the method comprises the following steps: the reaction vessel comprises a mixing vessel (21) and a hopper (22); the hopper (22) is fixedly connected to one end of the mixing container (21); a first gear (23) is fixedly connected to both sides of the mixing container (21); the rotating shaft (33) and the first gear (23) are coaxial.
6. The method for preparing the aldehyde-free environment-friendly wood adhesive according to claim 5, wherein the method comprises the following steps: four groups of connecting sleeves (25) are fixedly connected to the top of the hopper (22); a filter plate (24) is movably connected inside the hopper (22), and spring rods (26) are fixedly connected to four corners of the filter plate (24) corresponding to the connecting sleeves (25); the other end of the spring rod (26) far away from the filter plate (24) penetrates through the connecting sleeve (25).
7. The method for preparing the aldehyde-free environment-friendly wood adhesive according to claim 6, wherein the method comprises the following steps: a fixed frame (31) is fixedly connected to a supporting plate (11) on one side of the reaction container, and a servo motor (32) is fixedly connected in the fixed frame (31); the output end of the servo motor (32) is clamped with the end part of the rotating shaft (33); one end of the rotating shaft (33) close to the servo motor (32) is fixedly connected with a connecting gear (34), the bottom of the underframe (1) is fixedly connected with a duplicate gear (35) corresponding to the connecting gear (34), and the middle part of the duplicate gear (35) is connected to the supporting plate (11) in a sliding manner; the duplicate gear (35) is movably meshed with the connecting gear (34) and the first gear (23).
8. The method for preparing the aldehyde-free environment-friendly wood adhesive according to claim 7, wherein the method comprises the following steps: a scraper (28) is fixedly connected to the part, located in the mixing container (21), of the rotating shaft (33), and the scraper (28) is arranged in a U-shaped structure; one end, far away from servo motor (32), of rotating shaft (33) is connected with an electric heating pipe (36) in a penetrating manner, a plurality of groups of heat dissipation holes (37) are formed in the part, located in mixing container (21), of rotating shaft (33), and the heat dissipation holes (37) are arranged in a circumferential and symmetrical manner.
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| CN202211099906.4A CN115368854A (en) | 2022-09-07 | 2022-09-07 | Formaldehyde-free environment-friendly wood adhesive and preparation method thereof |
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Application publication date: 20221122 |