CN115139557A - PLA degradable plastic bag and preparation process thereof - Google Patents
PLA degradable plastic bag and preparation process thereof Download PDFInfo
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- CN115139557A CN115139557A CN202210558836.8A CN202210558836A CN115139557A CN 115139557 A CN115139557 A CN 115139557A CN 202210558836 A CN202210558836 A CN 202210558836A CN 115139557 A CN115139557 A CN 115139557A
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- degradable plastic
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- 229920006238 degradable plastic Polymers 0.000 title claims abstract description 39
- 238000002360 preparation method Methods 0.000 title claims abstract description 32
- 238000002156 mixing Methods 0.000 claims abstract description 98
- 239000000463 material Substances 0.000 claims abstract description 36
- 238000003756 stirring Methods 0.000 claims abstract description 24
- 239000011345 viscous material Substances 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 13
- 230000033001 locomotion Effects 0.000 claims abstract description 13
- 239000002904 solvent Substances 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 10
- 229920003023 plastic Polymers 0.000 claims abstract description 7
- 239000004033 plastic Substances 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims abstract description 6
- 239000006185 dispersion Substances 0.000 claims description 23
- 238000007599 discharging Methods 0.000 claims description 14
- 230000000149 penetrating effect Effects 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000001179 sorption measurement Methods 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 2
- 238000002844 melting Methods 0.000 abstract description 4
- 230000008018 melting Effects 0.000 abstract description 4
- 238000000071 blow moulding Methods 0.000 abstract description 3
- 229920000747 poly(lactic acid) Polymers 0.000 description 28
- 239000004626 polylactic acid Substances 0.000 description 28
- 230000000694 effects Effects 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 3
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical group CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000006482 condensation reaction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 235000014655 lactic acid Nutrition 0.000 description 1
- 239000004310 lactic acid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000008247 solid mixture Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D22/00—Producing hollow articles
- B29D22/003—Containers for packaging, storing or transporting, e.g. bottles, jars, cans, barrels, tanks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
- B29K2067/04—Polyesters derived from hydroxycarboxylic acids
- B29K2067/046—PLA, i.e. polylactic acid or polylactide
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention belongs to the technical field of PLA degradable plastic bags, in particular to a preparation process of a PLA degradable plastic bag, and the following scheme is proposed, which comprises the following steps: putting raw materials and a solvent with corresponding mass into a mixing box of mixing equipment; heating a cavity in the mixing box and carrying out melting and mixing by circumferential rotation in the horizontal direction; in the process of circumferential rotation, part of materials in the cavity do reciprocating staggered motion in the vertical direction; in the mixing process, part of the liquid solvent in the cavity is separated from the viscous material in a reciprocating way and then contacted with the viscous material; and extruding the mixed materials into mixed components, and performing subsequent treatment and blow molding to prepare the plastic bag. The invention utilizes the staggered motion in the vertical direction while stirring in the circumferential rotation, so that viscous materials are dispersed in the vertical direction while rotating in a centrifugal force, the liquid solvent in the viscous materials is effectively dispersed and flows to be melted and mixed, and the viscous materials are prevented from being agglomerated to influence the actual mixing efficiency.
Description
Technical Field
The invention relates to the technical field of PLA degradable plastic bags, in particular to a PLA degradable plastic bag and a preparation process thereof.
Background
Plastic is a synthetic high molecular compound, which is a material polymerized by using monomer raw materials through synthesis or condensation reaction, and PLA is a polymer (polylactic acid) composed of small lactic acid units. Lactic acid is an organic acid and plays an important role in our daily life, at present, PLA is one of the most common materials used for degradable plastic bags, and PLA is one of biodegradable nontoxic materials.
In the production and preparation processes of the PLA degradable plastic bag, multiple raw materials are generally required to be heated, melted and mixed in corresponding solvents according to a certain mass ratio, and then the plastic bag is manufactured by performing reciprocating separation and drying and then blow molding.
Disclosure of Invention
Based on the technical problem of the background art, the invention provides a preparation process of a PLA degradable plastic bag.
The invention provides a preparation process of a PLA degradable plastic bag, which comprises the following steps:
s1: putting raw materials and a solvent with corresponding mass into a mixing box of mixing equipment;
s2: heating a cavity in the mixing box and carrying out melting and mixing by circumferential rotation in the horizontal direction;
s3: in the process of circular rotation, part of materials in the cavity move in a reciprocating and staggered manner in the vertical direction;
s4: in the mixing process, part of the liquid solvent in the cavity is separated from the viscous material in a reciprocating way and then contacted with the viscous material;
s5: and extruding the mixed materials into mixed components, and performing subsequent treatment and blow molding to prepare the plastic bag.
Preferably, the top intermediate position of mixing box is fixed with the inlet pipe, the bottom intermediate position of mixing box is fixed with the discharging pipe, rotate the blending tank that is provided with spherical structure between inlet pipe and the discharging pipe, the top of blending tank outer wall is connected with first motor through gear drive, annular array distributes's spacing spout on the horizontal direction is seted up to the inner wall of blending tank, spacing spout extends the setting in vertical direction, the inner wall sliding connection of spacing spout has reciprocating motion's movable plate in vertical direction, one side outer wall that spacing spout was kept away from to the movable plate is fixed with a plurality of dispersion pieces, the bottom of mixing box is fixed with a plurality of heating members.
Preferably, the bottom position of blending tank outer wall is provided with the first electromagnetism piece that the multiunit is annular array and distributes, every group first electromagnetism piece equidistance distribution in vertical direction, the top position of blending tank outer wall is provided with the second electromagnetism piece that the multiunit is annular array and distributes, every group the second electromagnetism piece equidistance distribution in vertical direction, be symmetrical formula distribution between first electromagnetism piece and the second electromagnetism piece, the top and the bottom position of movable plate all embedded magnetic adsorption material that is fixed with.
Preferably, the setting is extended to the centre of sphere position of blending tank to the dispersion spare, the contact tank that the cross-section is the V-arrangement is all seted up to the top and the bottom outer wall of dispersion spare, set up interval staggered distribution between the contact tank of dispersion spare top and bottom position, the dispersion tank has been seted up to the position that the movable plate outer wall is located between two adjacent dispersion spares, the arc structure that the intermediate position upwards arched is set to the dispersion tank.
Preferably, penetrating grooves distributed in a horizontal annular array are formed in the bottom of the mixing tank, the penetrating grooves are distributed in a staggered mode in the vertical direction, heat conducting pieces with triangular sections are fixed to the inner walls of the penetrating grooves, the width of each heat conducting piece is gradually reduced towards the inside of the mixing tank, auxiliary grooves are formed in the positions, corresponding to the heat conducting pieces, of the inner wall of the mixing tank, and the width of each auxiliary groove is gradually increased towards the inside of the mixing tank.
Preferably, the axle center position of inlet pipe rotates the rotation piece that is provided with vertical extension, one side on inlet pipe top is provided with the feeder hopper, the top transmission that rotates the outer wall is connected with the second motor, the rigidity that rotates the outer wall and inlet pipe and correspond has feeding spiral leaf, the rigidity that rotates the outer wall and corresponds with the discharging pipe has ejection of compact spiral leaf, it is fixed with a plurality of stirring pieces to rotate the position that the outer wall is located the blending tank below.
Preferably, the rotating part is arranged to be a tubular structure with an open top end, the top end of the rotating part is rotatably connected with an air pipe through a bearing, the rotating part is connected with an air pump through the air pipe, a cavity communicated with the inside of the rotating part is arranged in the stirring part, and a through hole is formed in the outer wall of the stirring part.
Preferably, the lower position that rotates the piece and be located the inlet pipe is provided with the connecting cylinder, the top and the bottom of connecting cylinder all with rotate and communicate between the piece, hollow structure's connection ball has been placed in the connecting cylinder, the mesh has been seted up to the outer wall of connection ball.
Preferably, the stirring piece is set to be of a tubular structure, one end of the stirring piece, which is far away from the rotating piece, is sealed, connecting pieces distributed at equal intervals are arranged on the stirring piece, the connecting pieces are set to be of a hollow annular structure, the gap width in the connecting pieces is gradually reduced from the center to the periphery, the connecting pieces are made of elastic sheet materials, and the through holes are formed in the bottom positions of the connecting pieces.
A PLA degradable plastic bag is manufactured by adopting the preparation process of the PLA degradable plastic bag.
The beneficial effects of the invention are as follows:
in the embodiment of the invention, when the materials are stirred in a circumferential rotating manner, the viscous materials are dispersed in the vertical direction while rotating in a centrifugal force manner by utilizing the staggered motion in the vertical direction, so that the liquid solvent in the viscous materials is effectively dispersed and flows for melting and mixing, the viscous materials are prevented from being agglomerated to influence the actual mixing efficiency, and the quality of prepared finished products is prevented from being reduced.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a mixing device of a preparation process of a PLA degradable plastic bag according to the invention;
FIG. 2 is a schematic diagram of the internal structure of a mixing box of the preparation process of a PLA degradable plastic bag provided by the invention;
FIG. 3 is a schematic cross-sectional structural view of a mixing tank of a preparation process of a PLA degradable plastic bag, which is provided by the invention;
FIG. 4 is a schematic diagram of a moving plate structure of a preparation process of a PLA degradable plastic bag provided by the invention;
FIG. 5 is a schematic structural diagram of a dispersing member of a preparation process of a PLA degradable plastic bag according to the invention;
FIG. 6 is a schematic view of a partial cross-sectional structure of the position of a heat conducting member in the preparation process of a PLA degradable plastic bag according to the present invention;
fig. 7 is a schematic structural view of a rotating member of a preparation process of a PLA degradable plastic bag according to the present invention;
FIG. 8 is a schematic structural view of a connecting cylinder of a preparation process of a PLA degradable plastic bag according to the invention;
FIG. 9 is a schematic structural view of a stirring member of a preparation process of a PLA degradable plastic bag according to the invention;
fig. 10 is a schematic sectional structure view of an agitating member of a preparation process of a PLA degradable plastic bag according to the present invention.
In the figure: 1 mixing box, 2 feeding pipes, 3 discharging pipes, 4 mixing tanks, 5 supporting slide rails, 6 supporting rings, 7 first motors, 8 limiting slide grooves, 9 moving plates, 10 dispersing parts, 11 rotating parts, 12 second motors, 13 feed hoppers, 14 feeding spiral blades, 15 discharging spiral blades, 16 heating parts, 17 limiting slide blocks, 18 dispersing grooves, 19 contact grooves, 20 auxiliary grooves, 21 heat conducting parts, 22 first electromagnetic blocks, 23 second electromagnetic blocks, 24 stirring parts, 25 connecting cylinders, 26 positioning rods, 27 connecting balls, 28 connecting parts and 29 through holes.
Detailed Description
Example 1
A preparation process of a degradable PLA plastic bag comprises the following steps:
s1: putting raw materials and a solvent with corresponding mass into a mixing box 1 of mixing equipment;
s2: heating a cavity in the mixing box 1 and performing horizontal circumferential rotation to perform melt mixing;
s3: in the process of circumferential rotation, part of materials in the cavity do reciprocating staggered motion in the vertical direction, so that viscous materials are dispersed in the vertical direction while rotating under the action of centrifugal force by utilizing the staggered motion in the vertical direction while stirring in the circumferential rotation, liquid solvents in the viscous materials are effectively dispersed and flow to perform melt mixing, the viscous materials are prevented from being accumulated into blocks to influence the actual mixing efficiency, and the quality of prepared finished products is prevented from being reduced;
s4: in the mixing process, part of liquid solvent in the cavity is separated from the viscous material in a reciprocating way and then contacted, so that the viscous material alternately rotates and disperses in a liquid state and a near-dry state, the material moves in the liquid state to flow and disperse, and the material is impacted and flapped in the near-dry state to improve the heating uniformity of the material, thereby improving the actual melting and mixing effect and the actual mixing efficiency through the reciprocating operation;
s5: extruding the mixed materials into mixed components, and performing subsequent treatment and then blowing to prepare the plastic bag.
Referring to fig. 1-3, in the invention, a feeding pipe 2 is fixed at the middle position of the top end of a mixing box 1, a discharging pipe 3 is fixed at the middle position of the bottom end of the mixing box 1, a solenoid valve is arranged on the discharging pipe 3, a mixing tank 4 with a spherical structure is rotatably arranged between the feeding pipe 2 and the discharging pipe 3, fixing holes are respectively arranged at the top end and the bottom end of the mixing tank 4, the circumferential inner walls of the two fixing holes are respectively rotatably connected with the outer walls of the feeding pipe 2 and the discharging pipe 3 through bearings, a horizontally-placed supporting ring 6 is fixed at the middle position of the outer wall of the mixing tank 4, a supporting slide rail 5 is fixed at the position of the inner wall of the mixing box 1 corresponding to the supporting ring 6, the top of the outer wall of the mixing tank 4 is connected with a first motor 7 through gear transmission, a transmission gear is fixed at the top of the outer wall of the mixing tank 4, and the first motor 7 is fixed at one side position of the top of the mixing box 1, the output shaft of the first motor 7 is fixed with a driving gear meshed with the transmission gear, the inner wall of the mixing tank 4 is provided with a limiting chute 8 which is distributed in an annular array in the horizontal direction, the limiting chute 8 extends in the vertical direction, the inner wall of the limiting chute 8 is connected with a moving plate 9 which reciprocates in the vertical direction in a sliding way, a limiting slide block 17 is fixed at the middle position of one side of the moving plate 9 close to the limiting chute 8, the limiting slide block 17 is connected with the limiting chute 8 in a sliding way, a plurality of dispersing pieces 10 are fixed on the outer wall of one side of the moving plate 9 far away from the limiting chute 8, a plurality of heating pieces 16 are fixed at the bottom of the mixing box 1, when the mixing tank is in actual use, materials and solvents are put into the mixing tank 4 from the position of the feeding pipe 2, the liquid level is positioned near the position of the sphere center of the mixing tank 4, and the mixing tank 4 is rotated through the heating pieces 16 and the first motor 7 to heat and mix the materials, and blending tank 4 is at the pivoted in-process, and the movable plate 9 in the blending tank 4 is along vertical extension's spacing spout 8 and at vertical direction reciprocating motion to make dispersion spare 10 at vertical direction reciprocating swing and carry out vertical cutting dispersion to the material, thereby improve the dispersion effect that flows between liquid and the solid composition, and avoid viscous material caking to influence the mixing effect, with mixing efficiency and the finished product preparation quality that improves reality.
Referring to fig. 2-3, in the present invention, a plurality of sets of first electromagnetic blocks 22 distributed in an annular array are disposed at the bottom position of the outer wall of the mixing tank 4, each set of first electromagnetic blocks 22 is distributed equidistantly in the vertical direction, the heating members 16 and the plurality of sets of first electromagnetic blocks 22 are arranged alternately at intervals, a plurality of sets of second electromagnetic blocks 23 distributed in an annular array are disposed at the top position of the outer wall of the mixing tank 4, each set of second electromagnetic blocks 23 is distributed equidistantly in the vertical direction, the first electromagnetic blocks 22 and the second electromagnetic blocks 23 are both fixed on the inner wall of the mixing tank 1, the first electromagnetic blocks 22 and the second electromagnetic blocks 23 are distributed in an axial symmetry manner along the axis of the feeding pipe 2, magnetic adsorption materials such as iron blocks are fixed at the top end and the bottom end of the moving plate 9 in an embedded manner, the mixing tank 4 is made of a non-magnetic adsorption rigid material, and in practical use, the first electromagnetic blocks 22 and the second electromagnetic blocks 23 which are distributed in an axisymmetric manner move in opposite directions, each group of the first electromagnetic blocks 22 is energized from top to bottom alternately, the moving plate 9 and the dispersing piece 10 move downwards actively by adsorbing an iron block at the bottom end of the moving plate 9, each group of the second electromagnetic blocks 23 is energized from bottom to top alternately, the moving plate 9 and the dispersing piece 10 move upwards actively by adsorbing an iron block at the top end position, the first electromagnetic blocks 22 and the second electromagnetic blocks 23 which are distributed circumferentially are energized alternately in the horizontal direction, and the materials in the mixing tank 4 are continuously vertically cut and dispersed at different positions in cooperation with the rotation of the mixing tank 4, so that the uniformity and the coverage comprehensiveness of vertical dispersion are ensured, and the dispersive flow mixing effect of the materials is improved by the opposite movement of the moving plate 9 which is distributed symmetrically, so that the actual mixing effect and mixing efficiency are improved.
Referring to fig. 4-5, in the present invention, the dispersing members 10 are extended toward the center of the mixing tank 4, the top and bottom outer walls of the dispersing members 10 are both provided with contact grooves 19 having V-shaped cross sections, the contact grooves 19 at the top and bottom of the dispersing members 10 are arranged in a staggered arrangement, the outer wall of the side of the moving plate 9 away from the limiting chute 8, which is located between two adjacent dispersing members 10, is provided with a dispersing groove 18, the dispersing groove 18 is arranged in an arc structure with an upward arched middle position, in practical use, the end of the dispersing member 10 extending toward the center of the mixing tank 4 is inclined upward when being located below the center of the ball, i.e., when being located in the material, so as to effectively carry part of the material out to disperse when rotating upward, and the operation effect of liquid dispersion and flow in the material is improved by cooperating with the contact grooves 19, and the end of the dispersing member 10 close to the center of the ball is inclined downward when being located above, the contacting grooves 19 are cooperating with the material to uniformly disperse part of the material while rotating circumferentially, and the reciprocating motion of the dispersing members 10 is improved to the uniform dispersion effect of the material dispersion.
Referring to fig. 6, in the present invention, the bottom of the mixing tank 4 is provided with penetrating grooves distributed in a horizontal annular array, the penetrating grooves are distributed in a staggered manner in a vertical direction, heat conducting members 21 with a triangular cross section are fixed on the inner wall of the penetrating grooves, the width of the heat conducting members 21 gradually decreases towards the inside of the mixing tank 4, auxiliary grooves 20 are formed in positions of the inner wall of the mixing tank 4 corresponding to the heat conducting members 21, the width of the auxiliary grooves 20 gradually increases towards the inside of the mixing tank 4, and the side wall of the heating member 16 is close to the position of the heat conducting members 21.
A PLA degradable plastic bag is manufactured by adopting the preparation process of the PLA degradable plastic bag.
Example 2
Referring to fig. 3, in the present invention, the rotating member 11 is configured as a tubular structure with an open top end, the top end of the rotating member 11 is rotatably connected with an air pipe through a bearing, the air pipe is fixed on the top of the fixed housing through a bracket, the rotating member 11 is connected with an air pump through the air pipe, a cavity communicated with the inside of the rotating member 11 is arranged in the stirring member 24, and a through hole 29 is arranged on the outer wall of the stirring member 24.
Referring to fig. 8, in the present invention, the rotating member 11 is provided with the connecting cylinder 25 at a position below the feeding pipe 2, the top end and the bottom end of the connecting cylinder 25 are both communicated with the rotating member 11, the connecting ball 27 with a hollow structure is placed in the connecting cylinder 25, and the outer wall of the connecting ball 27 is provided with the mesh hole.
Referring to fig. 9-10, in the present invention, the stirring member 24 is disposed in a tubular structure, one end of the stirring member 24 away from the rotating member 11 is sealed, one end of the stirring member 24 close to the rotating member 11 is open and is communicated with the inside of the rotating member 11, the stirring member 24 is provided with connecting members 28 distributed at equal intervals, the connecting members 28 are disposed in a hollow annular structure, the width of a gap in the connecting members 28 is gradually reduced from the center to the periphery, the connecting members 28 are made of elastic sheet materials, and the through holes 29 are disposed at the bottom of the connecting members 28.
A PLA degradable plastic bag is manufactured by adopting the preparation process of the PLA degradable plastic bag.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. A preparation process of a PLA degradable plastic bag is characterized by comprising the following steps:
s1: putting raw materials and a solvent with corresponding mass into a mixing box (1) of mixing equipment;
s2: heating a cavity in a mixing box (1) and carrying out melt mixing by circumferential rotation in the horizontal direction;
s3: in the process of circular rotation, part of materials in the cavity move in a reciprocating and staggered manner in the vertical direction;
s4: in the mixing process, part of the liquid solvent in the cavity is separated from the viscous material in a reciprocating way and then contacted with the viscous material;
s5: extruding the mixed materials into mixed components, and performing subsequent treatment and then blowing to prepare the plastic bag.
2. The preparation process of a PLA degradable plastic bag according to claim 1, characterized in that, the top middle position of mixing box (1) is fixed with inlet pipe (2), the bottom middle position of mixing box (1) is fixed with discharging pipe (3), rotate between inlet pipe (2) and discharging pipe (3) and be provided with spherical structure's blending tank (4), the top of blending tank (4) outer wall is connected with first motor (7) through gear drive, annular array distributes's spacing spout (8) on the horizontal direction is seted up to the inner wall of blending tank (4), spacing spout (8) extend the setting in the vertical direction, the inner wall sliding connection of spacing spout (8) has moving plate (9) reciprocating motion in the vertical direction, one side outer wall that spacing spout (8) was kept away from to moving plate (9) is fixed with a plurality of dispersion pieces (10), the bottom of mixing box (1) is fixed with a plurality of heating elements (16).
3. The preparation process of a PLA degradable plastic bag as claimed in claim 2, wherein the bottom position of the outer wall of the mixing tank (4) is provided with a plurality of groups of first electromagnetic blocks (22) distributed in an annular array, each group of the first electromagnetic blocks (22) are distributed equidistantly in the vertical direction, the top position of the outer wall of the mixing tank (4) is provided with a plurality of groups of second electromagnetic blocks (23) distributed in an annular array, each group of the second electromagnetic blocks (23) are distributed equidistantly in the vertical direction, the first electromagnetic blocks (22) and the second electromagnetic blocks (23) are distributed symmetrically, and the top and bottom positions of the movable plate (9) are fixed with magnetic adsorption materials in an embedded manner.
4. The preparation process of a PLA degradable plastic bag according to claim 2 or 3, wherein the dispersion member (10) extends towards the center of the mixing tank (4), the outer walls of the top and the bottom of the dispersion member (10) are provided with contact grooves (19) with V-shaped cross sections, the contact grooves (19) at the top and the bottom of the dispersion member (10) are arranged to be distributed in a staggered manner at intervals, the dispersion groove (18) is provided at a position between two adjacent dispersion members (10) on the outer wall of the movable plate (9), and the dispersion groove (18) is arranged to be an arc structure with an upward arch middle position.
5. The preparation process of the PLA degradable plastic bag as claimed in claim 2 or 3, wherein the bottom of the mixing tank (4) is provided with penetrating grooves distributed in a horizontal annular array, the penetrating grooves are distributed in a staggered manner in a vertical direction, the inner walls of the penetrating grooves are fixed with heat conducting members (21) with triangular cross sections, the width of the heat conducting members (21) is gradually reduced towards the inside of the mixing tank (4), the positions of the inner walls of the mixing tank (4) corresponding to the heat conducting members (21) are provided with auxiliary grooves (20), and the width of the auxiliary grooves (20) is gradually increased towards the inside of the mixing tank (4).
6. The preparation process of a PLA degradable plastic bag according to claim 2 or 3, characterized in that the axial center of the feeding pipe (2) is provided with a vertically extending rotating part (11), one side of the top end of the feeding pipe (2) is provided with a feeding hopper (13), the top end of the outer wall of the rotating part (11) is connected with a second motor (12) in a transmission manner, the outer wall of the rotating part (11) is fixed with a feeding spiral blade (14) at a position corresponding to the feeding pipe (2), the outer wall of the rotating part (11) is fixed with a discharging spiral blade (15) at a position corresponding to the discharging pipe (3), and the outer wall of the rotating part (11) is fixed with a plurality of stirring parts (24) at a position below the mixing tank (4).
7. The preparation process of the PLA degradable plastic bag as claimed in claim 6, wherein the rotating member (11) is arranged in a tubular structure with an open top end, the top end of the rotating member (11) is rotatably connected with an air pipe through a bearing, the rotating member (11) is connected with an air pump through the air pipe, a cavity communicated with the inside of the rotating member (11) is arranged in the stirring member (24), and the outer wall of the stirring member (24) is provided with a through hole (29).
8. The preparation process of a PLA degradable plastic bag as claimed in claim 7, wherein the rotating piece (11) is provided with a connecting cylinder (25) at a position below the feeding pipe (2), the top end and the bottom end of the connecting cylinder (25) are communicated with the rotating piece (11), a connecting ball (27) with a hollow structure is placed in the connecting cylinder (25), and the outer wall of the connecting ball (27) is provided with a mesh.
9. The preparation process of a PLA degradable plastic bag as claimed in claim 7, wherein the stirring part (24) is arranged in a tubular structure, the end of the stirring part (24) far away from the rotating part (11) is sealed, the stirring part (24) is provided with connecting pieces (28) distributed equidistantly, the connecting pieces (28) are arranged in a hollow annular structure, the width of the gap in the connecting pieces (28) is gradually reduced from the center to the periphery, the connecting pieces (28) are made of elastic sheet materials, and the through holes (29) are arranged at the bottom positions of the connecting pieces (28).
10. The PLA degradable plastic bag is characterized in that the PLA degradable plastic bag is prepared by adopting the preparation process of the PLA degradable plastic bag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210558836.8A CN115139557A (en) | 2022-05-21 | 2022-05-21 | PLA degradable plastic bag and preparation process thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210558836.8A CN115139557A (en) | 2022-05-21 | 2022-05-21 | PLA degradable plastic bag and preparation process thereof |
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| CN208097957U (en) * | 2018-02-07 | 2018-11-16 | 汉臣氏（沈阳）儿童制品有限公司 | A kind of novel three-dimensional mixing machine |
| CN110721617A (en) * | 2018-07-17 | 2020-01-24 | 成都禹泽科技有限公司 | Stirring tank |
| CN210332325U (en) * | 2019-07-24 | 2020-04-17 | 上海融芳香精香料有限公司 | Vertical stirring tank |
| CN113045882A (en) * | 2021-05-11 | 2021-06-29 | 李俊 | Degradable plastic film made of PLA material and production process thereof |
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2022
- 2022-05-21 CN CN202210558836.8A patent/CN115139557A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1016232A (en) * | 1961-12-07 | 1966-01-05 | John Francis Anthony Meyer | Liquids and solids mixer |
| CN208097957U (en) * | 2018-02-07 | 2018-11-16 | 汉臣氏（沈阳）儿童制品有限公司 | A kind of novel three-dimensional mixing machine |
| CN110721617A (en) * | 2018-07-17 | 2020-01-24 | 成都禹泽科技有限公司 | Stirring tank |
| CN210332325U (en) * | 2019-07-24 | 2020-04-17 | 上海融芳香精香料有限公司 | Vertical stirring tank |
| CN113045882A (en) * | 2021-05-11 | 2021-06-29 | 李俊 | Degradable plastic film made of PLA material and production process thereof |
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