Anti-boiling polypropylene ink and manufacturing process

Abstract

The application provides an anti-cooking polypropylene ink and a manufacturing process, and relates to the technical field of ink manufacturing. The manufacturing process comprises the following steps: putting chlorinated polypropylene and a mixed solvent into a reaction kettle and heating and dissolving; adding a titanate coupling agent and stirring at a low speed; adding a high-temperature phthalocyanine blue pigment and a nano-silicon dioxide dispersing agent into an emulsifying device; starting the emulsifying device, high-speed shearing and emulsifying for 30 minutes, starting an external vacuumizing device, and periodically vacuumizing the air in a defoaming assembly; removing micro-bubbles and adjusting a solvent evaporation gradient. The whole emulsifying device can realize automatic emulsification processing of a large batch, and the specification requirement of a stirring power device for emulsification is reduced. A quantitative feeding tank is used to push the injected raw materials, so that the solution can be emulsified in a flowing state in the inside of a shearing emulsifying assembly, and the emulsification efficiency is ensured to be consistent and uniform.

Description

Technical Field

[0001] This invention relates to the field of ink manufacturing technology, specifically to a retortable polypropylene ink and its manufacturing process. Background Technology

[0002] Polypropylene (PP) is a colorless, odorless, and non-toxic thermoplastic synthetic resin commonly used as a binder in ink manufacturing. The binder plays a crucial role in ink production, dispersing pigments and imparting appropriate viscosity, flowability, and transfer properties. Due to its excellent processability and adhesion, PP can be used as an adhesive layer in extruded composite films, a hot melt adhesive, and even a compatibilizer between PP and other polar polymers such as polyamide (PA). Ink primarily consists of pigments, binders, fillers, and additives. Pigments are the main color-developing component of ink; common pigments include organic and inorganic pigments, thus ink preparation utilizes a variety of inorganic non-metallic materials.

[0003] In the existing technology, the preparation process of anti-cooking polypropylene ink requires shear emulsification to disperse the slurry and thus control its actual fineness. However, the existing emulsification equipment is inefficient. The internal shear emulsification blades can only provide high-speed emulsification processing for raw materials within a fixed range. This results in a limitation on the overall emulsification capacity and differences in emulsification quality in different areas. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide an anti-cooking polypropylene ink and its manufacturing process, thereby solving the problems mentioned in the background art. The present invention utilizes vacuum high-speed shear emulsification combined with multi-stage grinding to reduce the energy consumption required for dispersion and improve the precision of fineness control. The emulsification equipment as a whole can achieve large-scale automated emulsification processing, and the requirements for the specifications of the stirring power equipment used for emulsification are reduced. A quantitative feeding tank is used to push the injected raw materials, allowing the solution to undergo emulsification within the shear emulsification component in a flowing state, ensuring that all raw materials ultimately receive a consistent and uniform emulsification efficiency.

[0005] To achieve the above objectives, the present invention provides a technical solution as follows: a manufacturing process for retortable polypropylene ink, the manufacturing process comprising the following steps:

[0006] S1. Add chlorinated polypropylene and mixed solvent into the reaction vessel and heat to 60°C to dissolve at a constant temperature.

[0007] S2. Add 0.5% titanate coupling agent and stir at low speed for 30 minutes;

[0008] S3. Add high-temperature phthalocyanine blue pigment and nano silica dispersant into the emulsification equipment, and set the operating speed of the drive mechanism in the emulsification equipment;

[0009] S4. Start the emulsification equipment and perform high-speed shear emulsification for 30 minutes to initially disperse the slurry until the fineness meets the standard. During this process, start the external vacuum equipment to periodically vacuum the air inside the defoaming component.

[0010] S5. Remove microbubbles and adjust the solvent evaporation gradient;

[0011] S6. After filtration, the contents are filled into a sealed metal drum and protected with nitrogen.

[0012] Furthermore, in step S1, the concentration of chlorinated polypropylene is chlorinated polypropylene, the mixed solvent includes ethyl acetate and cyclohexanone, and the ratio of ethyl acetate to cyclohexanone is 6:4, the constant temperature dissolution time is 2 hours; the stirring speed in step S2 is 400 rpm.

[0013] Furthermore, in step S3, the high-temperature phthalocyanine blue pigment and nano silica dispersant are first injected into the inside of the quantitative delivery tank. The top drive mechanism is then started. After the drive mechanism is running, the motor drives the lead screw to rotate. The lead screw, in conjunction with the threaded sleeve, drives the entire quantitative pressing mechanism to move up and down. The quantitative pressing mechanism pushes the injected raw materials toward the bottom until they are delivered into the inside of the defoaming component.

[0014] Furthermore, in step S4, the raw material is conveyed from the bottom feeding pipe into the interior of the defoaming component, where it undergoes defoaming treatment. The entire defoaming process includes the following:

[0015] During the downward movement of the quantitative pressing mechanism, both the first and second solenoid valves remain open, allowing the defoamed raw material inside the defoaming component to be pushed along the feed pipe by the raw material injected into the feed pipe and flow to the emulsification tank at the end for high-speed shear emulsification.

[0016] Furthermore, during the upward movement of the quantitative pressing mechanism as the driving mechanism rotates in the opposite direction, the first and second solenoid valves are simultaneously closed, forming a closed cavity inside the defoaming component. Simultaneously, the vacuum pipe connected to the vacuum pumping equipment creates an approximately negative pressure state inside the defoaming tank. The injected raw materials are dispersed inside the defoaming tank by multiple baffles, and the flow distribution layers between adjacent baffles correspond to independent docking sleeves.

[0017] Furthermore, the docking sleeve extracts air from each corresponding distribution layer through air extraction holes on its surface, creating an effective negative pressure state inside each distribution layer. The end drive mechanism then rotates in the forward direction again, starting to push the raw material inside the quantitative feeding tank. After the defoaming component completes defoaming, the raw material continues to be transported to the shear emulsification component.

[0018] Furthermore, after the drive mechanism is started, the motor controls the lead screw to rotate, and the surface of the lead screw drives the drive gear to rotate. The drive gear, through the toothed belt sleeved on the side, links the driven gear at the other end to rotate. An acceleration gear set structure is formed between the driven gear and the drive gear, which causes the driven shaft to drive the shearing frame at the end to operate at high speed, so as to achieve the purpose of high-speed shearing and emulsification of the raw materials inside the emulsification tank. The emulsified raw materials, along with the flow state of the raw materials inside the entire emulsification component, enter the collection tank at the bottom, and are finally transported back to the quantitative feeding tank through the connecting pipe.

[0019] Furthermore, the quantitative pressing mechanism operates through a central threaded sleeve and a lead screw. The protrusions on both sides are embedded in the lifting grooves on the inner wall of the quantitative feeding tank. The lead screw rotates in both forward and reverse directions, driving the entire quantitative pressing mechanism to move down and up. After the movable disc inside the quantitative pressing mechanism moves to the positions of the first and second magnetic strips, it controls the rotation of the first magnetic strip through adsorption, thereby driving the entire movable disc to rotate at a small angle and controlling the first and second through holes to align or stagger, ensuring that the first and second through holes can only be staggered when the quantitative pressing mechanism is descending.

[0020] Furthermore, in step S5, the viscosity is controlled at 4000±500 cps, and volatile solvent is added until the solid content reaches 50±2%.

[0021] A retortable polypropylene ink prepared by the above manufacturing process, the components of which include: chlorinated polypropylene, mixed solvent, titanate coupling agent, high-temperature phthalocyanine blue pigment, nano silica dispersant, epoxy plasticizer, silicone defoamer and volatile solvent, wherein the volatile solvent is ethyl acetate and the mixed solvent includes ethyl acetate and cyclohexanone.

[0022] The beneficial effects of this invention are:

[0023] 1. This invention reduces the energy consumption required for dispersion and improves the control precision of fineness by using vacuum high-speed shear emulsification combined with multi-stage grinding. The emulsification equipment as a whole can realize large-scale automatic emulsification processing, and the requirements for the specifications of the stirring power equipment used for emulsification are reduced.

[0024] 2. The manufacturing process of this anti-retorable polypropylene ink uses a quantitative feeding tank to push the injected raw materials, so that the solution can be emulsified inside the shear emulsification component in a flowing state, ensuring that all raw materials are ultimately subjected to a consistent and uniform emulsification efficiency. Moreover, the periodic quantitative feeding process can be achieved with only a single power device, which improves the utilization rate of the power device. Combined with the quantitative pressing mechanism, a fast and automated reciprocating lifting and lowering feeding process can be achieved.

[0025] 3. This retortable polypropylene ink manufacturing process links the quantitative feeding pipe with the shear emulsification component via a drive mechanism. Therefore, there is a positive correlation between the feeding speed and emulsification efficiency. This means that while accelerating the feeding, the final emulsification effect of the raw material in the flowing state can be ensured by increasing the shear emulsification speed. Furthermore, the addition of a defoaming component enables efficient defoaming, further shortening the overall emulsification cycle, improving emulsification quality, and resulting in a more uniform and thorough defoaming process. Attached Figure Description

[0026] Figure 1 This is a flowchart of a retortable polypropylene ink manufacturing process according to the present invention;

[0027] Figure 2 This is a structural diagram of an emulsification device used in the manufacturing process of an anti-retorable polypropylene ink according to the present invention.

[0028] Figure 3 This is a schematic diagram showing the connection between the shear emulsification component and the defoaming component of the present invention;

[0029] Figure 4 This is a diagram showing the internal structure of the quantitative feeding tank of the present invention;

[0030] Figure 5 This is an exploded view of the quantitative pressing mechanism of the present invention;

[0031] Figure 6 This is a cross-sectional view of the quantitative feeding tank of the present invention;

[0032] Figure 7 This is a exploded view of the shear emulsification component of the present invention;

[0033] Figure 8 This is a cross-sectional view of the defoaming component of the present invention;

[0034] In the diagram: 1. Quantitative feeding tank; 2. Drive mechanism; 3. Shearing emulsification component; 4. Feeding pipe; 5. Defoaming component; 6. First solenoid valve; 7. Diversion pipe; 8. Second solenoid valve; 9. Emulsification tank; 10. Collection tank; 11. Connecting pipe; 12. Vacuuming pipe; 13. Support frame; 14. Top plate; 15. Motor; 16. Lead screw; 17. Drive gear; 18. Quantitative pressing mechanism; 19. Fixed plate. ; 20. First through hole; 21. Threaded sleeve; 22. Raised bar; 23. Interlayer; 24. Movable disc; 25. Second through hole; 26. First magnetic strip; 27. Second magnetic strip; 28. Lifting groove; 29. ​​Third magnetic strip; 30. Toothed belt; 31. Driven gear; 32. Driven shaft; 33. Shear frame; 34. Defoamer; 35. Partition plate; 36. Diversion layer; 37. Connecting sleeve; 38. Air extraction hole. Detailed Implementation

[0035] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0036] Please see Figures 1 to 8 The present invention provides the following technical solution: a manufacturing process for retortable polypropylene ink, the manufacturing process comprising the following steps:

[0037] S1. Chlorinated polypropylene and mixed solvent are added to the reaction vessel and heated to 60°C for constant temperature dissolution. The concentration of chlorinated polypropylene is chlorinated polypropylene. The mixed solvent includes ethyl acetate and cyclohexanone, and the ratio of ethyl acetate to cyclohexanone is 6:4. The constant temperature dissolution time is 2 hours.

[0038] S2. Add 0.5% titanate coupling agent and stir at low speed for 30 minutes at a speed of 400 rpm.

[0039] S3. Add high-temperature phthalocyanine blue pigment and nano silica dispersant into the emulsification equipment. Set the running speed of the drive mechanism 2 in the emulsification equipment. First, inject the high-temperature phthalocyanine blue pigment and nano silica dispersant into the inside of the quantitative conveying tank. Start the drive mechanism 2 at the top. After the drive mechanism 2 runs, the motor 15 drives the lead screw 16 to rotate. The lead screw 16, in conjunction with the threaded sleeve 21, drives the entire quantitative pressing mechanism 18 to move up and down. The quantitative pressing mechanism 18 pushes the injected raw material towards the bottom until it is conveyed into the inside of the defoaming component 5.

[0040] The driving equipment used in this process includes a motor 15, a lead screw 16, a drive gear 17, a driven gear 31, and a toothed belt 30. A support frame 13 is welded to one side of the top of the quantitative feeding tank 1, and a top plate 14 is welded to the top of the support frame 13. The outer shell of the motor 15 is screwed to the surface of the top plate 14. The output end of the motor 15 is fitted with a lead screw 16. The surface of the lead screw 16 is keyed to the drive gear 17. A quantitative pressing mechanism 18 is also fitted on the surface of the lead screw 16. A toothed belt 30 is fitted on the side of the drive gear 17. The other end of the toothed belt 30 is fitted with a driven gear 31. A driven shaft 32 is installed at the bottom of the driven gear 31. A shearing frame 33 is installed at the end of the driven shaft 32.

[0041] S4. Start the emulsification equipment and perform high-speed shear emulsification for 30 minutes to initially disperse the slurry until the fineness meets the standard. During this process, start the external vacuum equipment to periodically vacuum the air inside the defoaming component 5. The raw material is transported into the defoaming component 5 from the bottom feeding pipe 4 and undergoes defoaming treatment in the defoaming component 5. The entire defoaming process includes the following:

[0042] During the downward movement of the quantitative pressing mechanism 18, both the first solenoid valve 6 and the second solenoid valve 8 remain open, allowing the raw material portion inside the defoaming component 5, which has already undergone defoaming, to flow along the diversion pipe 7 into the emulsifying tank 9 at the end, pushed by the raw material injected into the feeding pipe 4, to undergo a high-speed shear emulsification process.

[0043] In this embodiment, the defoaming component 5 includes a defoaming tank 34, a partition 35, and a vacuum pipe 12. The vacuum pipe 12 is embedded inside the defoaming tank 34, and the end of the vacuum pipe 12 is integrally formed with multiple docking sleeves 37. Each docking sleeve 37 has an air extraction hole 38 on its side. Multiple partitions 35 are installed inside the defoaming tank 34, and a diversion layer 36 is provided between adjacent partitions 35. Each diversion layer 36 is connected to the end of the feeding pipe 4, and a first solenoid valve 6 is installed on the surface of the feeding pipe 4. A diversion pipe 7 is connected to the other side of the defoaming tank 34, and a second solenoid valve 8 is installed at one end of the diversion pipe 7.

[0044] During the upward movement of the quantitative pressing mechanism 18 as the driving mechanism 2 rotates in the opposite direction, the first solenoid valve 6 and the second solenoid valve 8 are simultaneously controlled to close, so that the interior of the defoaming component 5 forms a closed cavity. Simultaneously, the vacuum pipe 12 connected to the vacuum pumping equipment is used to create an approximately negative pressure state inside the defoaming tank 34. The injected raw materials are dispersed inside the defoaming tank 34 by multiple partitions 35, and the flow distribution layer 36 between adjacent partitions 35 corresponds to an independent docking sleeve 37.

[0045] In this embodiment, the docking sleeve 37 extracts air from the interior of each corresponding diversion layer 36 through the air extraction hole 38 on its surface, so that an effective negative pressure state is formed inside each diversion layer 36. The end drive mechanism 2 rotates in the forward direction again and begins to push the raw material inside the quantitative feeding tank 1. After the defoaming component 5 completes the defoaming, the raw material continues to be transported to the interior of the shear emulsification component 3.

[0046] In this embodiment, after the drive mechanism 2 is started, the motor 15 controls the lead screw 16 to rotate. The surface of the lead screw 16 drives the drive gear 17 to rotate. The drive gear 17 is linked to the driven gear 31 at the other end through the toothed belt 30 sleeved on the side. An acceleration gear set structure is formed between the driven gear 31 and the drive gear 17, so that the driven shaft 32 drives the shearing frame 33 at the end to operate at high speed, so as to achieve the purpose of high-speed shearing and emulsification of the raw material inside the emulsification tank 9. The emulsified raw material enters the collection tank 10 at the bottom with the flow state of the raw material inside the entire emulsification component, and is finally transported to the quantitative feeding tank 1 again through the connecting pipe 11.

[0047] The shear emulsification assembly 3 used in this embodiment includes an emulsification tank 9, a collection tank 10, and a connecting pipe 11. The top side of the emulsification tank 9 is partially connected to the diversion pipe 7. The collection tank 10 is installed at the bottom of the emulsification tank 9, and the connecting pipe 11 is connected to the side of the collection tank 10. The shear frame 33 is installed inside the emulsification tank 9 and is used to perform high-speed shear emulsification treatment on the raw materials transported from the defoaming tank 34.

[0048] In this embodiment, the metering device includes a fixed plate 19, a movable plate 24, and a first magnetic strip 26. The fixed plate 19 has a sandwich layer 23 in the middle, and the two sides of the fixed plate 19 are integrally formed with protrusions 22. The movable plate 24 is inserted into the sandwich layer 23, and the first magnetic strip 26 is embedded at the edge of the movable plate 24. In this embodiment, there are four first magnetic strips 26. A lifting groove 28 is provided on the inner wall of the metering feeding tank 1, and the metering pressing mechanism 18 is embedded into the lifting groove 28 through the protrusions 22 on the side.

[0049] The quantitative pressing mechanism 18 operates in conjunction with the screw 16 via the central threaded sleeve 21. The protrusions 22 on both sides are embedded in the lifting grooves 28 on the inner wall of the quantitative feeding tank 1. The screw 16 rotates in both forward and reverse directions, driving the entire quantitative pressing mechanism 18 to move down and up. After the movable disk 24 on the inner side of the quantitative pressing mechanism 18 moves to the position of the first magnetic strip 26 and the second magnetic strip 27, it controls the rotation of the first magnetic strip 26 through adsorption, thereby driving the entire movable disk 24 to rotate at a small angle and controlling the first through hole 20 and the second through hole 25 to be aligned or staggered, ensuring that the first through hole 20 and the second through hole 25 can only be staggered when the quantitative pressing mechanism 18 is descending.

[0050] S5. Remove microbubbles and adjust the solvent evaporation gradient to control the viscosity at 4000±500cps, and add volatile solvent until the solid content reaches 50±2%;

[0051] S6. After filtration, the contents are filled into a sealed metal drum and protected with nitrogen.

[0052] This embodiment also provides a retortable polypropylene ink prepared by the above manufacturing process. The components of the retortable polypropylene ink include: chlorinated polypropylene, mixed solvent, titanate coupling agent, high-temperature phthalocyanine blue pigment, nano silica dispersant, epoxy plasticizer, silicone defoamer and volatile solvent. The volatile solvent is ethyl acetate and the mixed solvent includes ethyl acetate and cyclohexanone.

[0053] Specifically, the concentrations of the above materials provided in this embodiment are as follows: chlorinated polypropylene 30%, titanate coupling agent 0.5%, high-temperature phthalocyanine blue pigment 20%, nano silica dispersant 1%, epoxy plasticizer 1%, and organosilicon defoamer 0.5%.

[0054] The foregoing has shown and described the basic principles and main features of the present invention and its advantages. It will be apparent to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention.

[0055] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A process for the production of retort resistant polypropylene inks, characterized by, The manufacturing process comprises the following procedures: S1, put chlorinated polypropylene and mixed solvent into the reaction kettle, heat to 60℃ constant temperature dissolution; S2, add 0.5% titanium coupling agent, low speed stirring for 30 minutes; S3, add high temperature phthalocyanine blue pigment and nano silicon dioxide dispersant into the emulsifying equipment, set the running speed of the driving mechanism in the emulsifying equipment; S4, start the emulsifying equipment, high speed shearing emulsification for 30 minutes, preliminary dispersion to the slurry fineness standard, in this process, start the external vacuum equipment, periodically vacuum treatment the air in the defoaming assembly; S5, remove micro-bubbles and adjust the solvent evaporation gradient; S6, after filtration, fill into airtight metal barrel, nitrogen protection; In S4, the raw materials are transported from the bottom feeding pipe to the inside of the defoaming assembly, and defoaming treatment is carried out in the defoaming assembly. The whole defoaming process includes the following contents: During the quantitative pressing mechanism downward movement process, the first electromagnetic valve and the second electromagnetic valve are kept open state, so that the raw material in the defoaming assembly after defoaming is pushed along with the raw material injected into the feeding pipe, flows along the shunt pipe to the emulsifying tank at the end, and carries out high-speed shearing emulsification process, the quantitative pressing mechanism carries out upward movement stage along with the reverse rotation of the driving mechanism, synchronously controls the first electromagnetic valve and the second electromagnetic valve to close, so that the inside of the defoaming assembly forms a closed cavity, synchronously passes through the vacuumizing pipe connected with the vacuumizing equipment to form the approximate negative pressure state in the space inside the defoaming tank, the inside of the defoaming tank disperses the injected raw material through multiple partitions, the shunt layers between adjacent partitions correspond to independent butt sleeves respectively, the butt sleeve evacuates the air inside each corresponding shunt layer through the air extraction hole opened on the surface, so that each shunt layer forms an effective negative pressure state, the driving mechanism at the end is positively rotated again, starts to push the raw material in the quantitative feeding tank, and the raw material after defoaming in the defoaming assembly is continuously conveyed to the inside of the shearing emulsification assembly.

2. The process for making a retort resistant polypropylene ink according to claim 1, wherein: In step S1, the mixed solvent includes ethyl acetate and cyclohexanone, and ethyl acetate: cyclohexanone = 6:4, and the constant temperature dissolution time is 2 hours; the stirring speed in step S2 is 400 rpm.

3. A process for making a retort resistant polypropylene ink according to claim 1, wherein: In step S3, the high-temperature phthalocyanine blue pigment and the nano silicon dioxide dispersant are first injected into the inside of the quantitative conveying tank, the driving mechanism at the top is started, the motor drives the screw rod to rotate, the screw rod cooperates with the threaded sleeve to drive the whole quantitative pressing mechanism to carry out lifting movement, the quantitative pressing mechanism pushes the injected raw material towards the bottom, and the raw material is conveyed into the defoaming assembly.

4. The process for making a retort resistant polypropylene ink according to claim 1, wherein: In step S5, the viscosity is controlled to be 4000±500 cps, and the volatile solvent is supplemented until the solid content reaches 50±2%. In step S5, the viscosity is controlled to be 4000±500 cps, and the volatile solvent is supplemented until the solid content reaches 50±2%.

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