CN112063230A - Pure water gravure ink and production process thereof - Google Patents

Pure water gravure ink and production process thereof Download PDF

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Publication number
CN112063230A
CN112063230A CN202010990607.4A CN202010990607A CN112063230A CN 112063230 A CN112063230 A CN 112063230A CN 202010990607 A CN202010990607 A CN 202010990607A CN 112063230 A CN112063230 A CN 112063230A
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China
Prior art keywords
dispersion
water
tank body
horizontal tank
threaded sleeve
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CN202010990607.4A
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Chinese (zh)
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文彧
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Hunan Jinguli Ink Coating Co ltd
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Hunan Jinguli Ink Coating Co ltd
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Priority to CN202010990607.4A priority Critical patent/CN112063230A/en
Publication of CN112063230A publication Critical patent/CN112063230A/en
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/02—Printing inks
    • C09D11/10—Printing inks based on artificial resins
    • C09D11/102—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds
    • C09D11/104—Polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/115—Stirrers characterised by the configuration of the stirrers comprising discs or disc-like elements essentially perpendicular to the stirrer shaft axis
    • B01F27/1152—Stirrers characterised by the configuration of the stirrers comprising discs or disc-like elements essentially perpendicular to the stirrer shaft axis with separate elements other than discs fixed on the discs, e.g. vanes fixed on the discs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/19—Stirrers with two or more mixing elements mounted in sequence on the same axis
    • B01F27/191—Stirrers with two or more mixing elements mounted in sequence on the same axis with similar elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B01F27/73—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with rotary discs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/70—Mixers specially adapted for working at sub- or super-atmospheric pressure, e.g. combined with de-foaming
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/02—Printing inks
    • C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
    • C09D11/033—Printing inks characterised by features other than the chemical nature of the binder characterised by the solvent
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/02—Printing inks
    • C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
    • C09D11/037—Printing inks characterised by features other than the chemical nature of the binder characterised by the pigment

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)

Abstract

The invention discloses pure water gravure ink and a production process thereof, wherein the ink is prepared from the following raw materials in percentage by weight: 35-50% of water-soluble polyester resin, 10-15% of water-based pigment, 1-3% of dispersing agent, 0.01-0.3% of defoaming agent, 5-10% of water and 15-30% of edible alcohol. The invention can obtain the water-based gravure ink with good leveling property, bright color, good overprinting property and good adhesion.

Description

Pure water gravure ink and production process thereof
Technical Field
The invention relates to ink, in particular to pure water gravure ink and a production process thereof, and belongs to the technical field of ink.
Background
As one of the most commonly used materials in the current printing industry, the water-based gravure ink has the advantages of small pollution, difficult combustion and the like, and can produce a better printing effect. The traditional water-alcohol ink has the defects of machine halt, dry plate, difficult cleaning of a plate roller, difficulty in controlling the color of the dry plate, poor leveling property, water ripple and the like. The existing water-based gravure ink has the problem that the dispersion effect needs to be improved, and particularly has the problems of layering and agglomeration after long-time storage.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide pure water gravure ink and a production process thereof so as to obtain gravure ink with good leveling property, bright color, good overprinting property and good adhesion.
In order to achieve the purpose, one of the technical schemes adopted by the invention is as follows: the pure water gravure ink is composed of the following raw materials in percentage by weight: 35-50% of water-soluble polyester resin, 10-15% of water-based pigment, 1-3% of dispersing agent, 0.01-0.3% of defoaming agent, 5-10% of water and 15-30% of edible alcohol.
Further, the dispersant is an aqueous dispersant, and TG-F0521 from Taige barge (Beijing) science and technology Limited is selected.
Further, the defoaming agent is a water-based defoaming agent, and specifically, a silicone defoaming agent is selected.
The production process of the pure water gravure ink comprises the following steps:
(1) preparation of water-based pigment: preparing 15-50% of organic pigment, 0.5-3% of dispersing agent, 1-3% of propylene glycol, 1-2% of pH regulator and the balance of deionized water according to mass percentage, and ball-milling the organic pigment to nano level in advance; then adding the organic pigment and the wetting agent with the formula dosage into deionized water, and uniformly dispersing by adopting a rotary-pulp dispersion disc to obtain a pigment dispersion system; adding the dispersant with the formula dosage into a pigment dispersion system, homogenizing by ultrasonic waves, and adding a pH regulator until the pigment is neutral;
(2) preparing gravure ink: weighing the raw materials according to the formula for later use, fully mixing the water-soluble polyester resin, the water-based dispersing agent, the water-based defoaming agent, the water and the edible alcohol in the formula, grinding the mixture to the fineness of less than 5 mu m to obtain a base material, finally adding the water-based pigment, and dispersing the mixture under the vacuum sealing condition to obtain the pigment.
Further, in the preparation step of the gravure ink, the dispersion process is carried out in a specially-made vacuum dispersion device, the specially-made vacuum dispersion device comprises a horizontal tank body, the horizontal tank body is fixed on a base, a bidirectional screw is fixed at the center in the horizontal tank body, the outer peripheral wall of one end of the bidirectional screw is smooth and is fixed on the inner wall of the horizontal tank body through a bearing, the outer peripheral wall of the other end of the bidirectional screw is also smooth and penetrates through the side wall of the horizontal tank body to be fixedly connected with a power output shaft of a driving motor, and the end of the bidirectional screw, which is connected with the driving motor, is connected with the corresponding part of the; a first threaded sleeve and a second threaded sleeve are respectively in threaded fit on two sections of left-handed thread sections and right-handed thread sections with opposite rotation directions of the bidirectional screw rod, an annular groove is formed in the outer peripheral wall of the first threaded sleeve and is in sliding fit with a first dispersion disc through the annular groove, and an annular groove is also formed in the outer peripheral wall of the second threaded sleeve and is in sliding fit with a second dispersion disc through the annular groove; the first dispersion disc and the second dispersion disc are both in a round cake shape, the thickness of the round cake-shaped dispersion disc is gradually reduced from the center to the edge, and dispersion blades are fixed on the outer peripheral wall of the first dispersion disc and the outer peripheral wall of the second dispersion disc along the corresponding circumferential direction; a plurality of through holes penetrating through the corresponding dispersion discs are uniformly formed in the first dispersion disc and the second dispersion disc, and all the through holes in the first dispersion disc are staggered with all the through holes in the second dispersion disc; guide holes are formed in the upper portion and the lower portion of the first threaded sleeve and the upper portion and the lower portion of the second threaded sleeve respectively, the upper portion guide hole of the first threaded sleeve and the upper portion guide hole of the second threaded sleeve are coaxially arranged and penetrate through the same upper portion guide rod, the lower portion guide hole of the first threaded sleeve and the lower portion guide hole of the second threaded sleeve are coaxially arranged and penetrate through the same lower portion guide rod; a feed hopper is fixed at the upper part of one side of the horizontal tank body, the bottom of the feed hopper is communicated with the cavity in the horizontal tank body, and the top opening of the feed hopper is sealed by a sealing cover when the feed hopper is not used for feeding; a vacuumizing tube is also fixed on the horizontal tank body, the vacuumizing tube is communicated with the cavity in the horizontal tank body, and one end of the vacuumizing tube is connected with a vacuumizing pump; a discharging pipe is fixed at the bottom of one side of the horizontal tank body, an inverted L-shaped pipe is fixedly connected and communicated with the inside of the horizontal tank body on the discharging pipe, and a bottom pipe opening of the inverted L-shaped pipe is close to the bottom inside the horizontal tank body.
Furthermore, the peripheral wall of the horizontal tank body is a hollow interlayer wall, the bottom of one side of the hollow interlayer wall is fixedly connected and communicated with a drain pipe, a drain groove is formed in the base and positioned on one side of the horizontal tank body, the drain pipe penetrates through a mounting groove formed in a corresponding position on the base and then extends into the drain groove, and a water faucet is fixedly connected to the end part of one end, positioned in the drain groove, of the drain pipe; the upper part of one side of the hollow interlayer wall of the horizontal tank body is fixedly connected and communicated with a water inlet pipe.
Further, the dispersion process in the preparation step of the gravure ink specifically comprises the steps of adding a water-based pigment into a ground base material, mixing the water-based pigment and the ground base material uniformly, feeding the mixture into a horizontal tank body which is vacuumized in advance through a feed hopper, sealing the feed hopper, plugging a discharge pipe by a pipe plug, starting a driving motor to rotate forwards to drive a first dispersion disc and a second dispersion disc to move close to each other, starting the driving motor to rotate backwards to drive the first dispersion disc and the second dispersion disc to move away from each other, circulating the operation until the dispersion of the mixed material is completed, vacuumizing the dispersion process once at intervals, and stopping the driving motor during vacuumizing.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, through reasonable formula setting, the problems of leveling property and color of the water-based gravure ink can be effectively improved, so that the water-based gravure ink with good leveling property, bright color, good overprinting property and good adhesion is obtained;
2. the invention can realize the coating of the surface of the pigment by propylene glycol through the special preparation process of the water-based pigment, and lays a foundation for the subsequent dispersion effect;
3. in the preparation of the water-based pigment, the propylene glycol is firstly used for coating, then the dispersing agent is used for dispersing, and then the ultrasonic homogenization treatment is used, so that compared with the grinding dispersion in the prior art, the coating layer on the surface of the pigment is not damaged, and the dispersion effect is ensured;
4. by adopting the specially-made vacuum dispersion equipment, the dispersion under the vacuum environment is realized, the generation of bubbles under the conventional stirring dispersion is effectively avoided, and the damage of a coating layer on the surface of the pigment is avoided on the basis of ensuring the uniform dispersion, so that the pigment can be stored for a long time without layering and agglomeration.
Drawings
FIG. 1 is a sectional view of a part of the structure of the vacuum dispersion apparatus made in accordance with the present invention
FIG. 2 is a longitudinal sectional view of a horizontal tank in the vacuum dispersion apparatus made in accordance with the present invention
FIG. 3 is a schematic view of the structure of the first threaded sleeve and the first dispersion plate or the second threaded sleeve and the second dispersion plate of the vacuum dispersion apparatus made in accordance with the present invention
FIG. 4 is a schematic view of the first or second threaded sleeve of the present invention;
the device comprises a horizontal tank body 1, a horizontal tank body 2, a base 3, a bidirectional screw rod 3.1, a left-handed thread section 3.2, a right-handed thread section 4, a driving motor 5, a first thread sleeve 6, a second thread sleeve 7, an annular groove 8, a first dispersion disc 9, a second dispersion disc 10, dispersion blades 11, a through hole 12, a guide hole 13, an upper guide rod 14, a lower guide rod 15, a feed hopper 16, a vacuumizing pipe 17, a discharge pipe 18, an inverted L-shaped pipe 19, a discharge pipe 20, a water inlet pipe 21 and a drainage groove. For convenience of description, the first and second threaded sleeves 5 and 6 are collectively referred to as a threaded sleeve a, and the first and second dispersion discs 8 and 9 are collectively referred to as a dispersion disc B.
Detailed Description
The invention will now be further described with reference to specific embodiments and the accompanying drawings. The following are merely preferred embodiments of the present application and do not limit the scope of the present application. Any equivalents or similar substitutes without departing from the inventive concept of the present application shall fall within the protection scope of the present application.
As shown in fig. 1-4, the method is carried out in a specially-made vacuum dispersion device of the invention, the specially-made vacuum dispersion device comprises a horizontal tank body 1, the horizontal tank body 1 is fixed on a base 2, a bidirectional screw 3 is fixed at the center in the horizontal tank body 1, the outer peripheral wall of one end of the bidirectional screw 3 is smooth and is fixed on the inner wall of the corresponding side of the horizontal tank body 1 through a bearing, the outer peripheral wall of the other end of the bidirectional screw 3 is also smooth and is fixedly connected with a power output shaft of a driving motor 4 after penetrating through the corresponding side wall of the horizontal tank body 1, and the end of the bidirectional screw 3, which is connected with the driving motor 4 (which is a stepping motor; a first threaded sleeve 5 and a second threaded sleeve 6 are respectively in threaded fit on two sections of a left-handed thread section 3.1 and a right-handed thread section 3.2 of the bidirectional screw rod 3 with opposite rotation directions, an annular groove 7 is formed in the outer peripheral wall of the first threaded sleeve 5 and is in sliding fit with a first dispersion disc 8 through the annular groove 7, an annular groove 7 is also formed in the outer peripheral wall of the second threaded sleeve 6, and a second dispersion disc 9 is in sliding fit with the annular groove 7; the first dispersion plate 8 and the second dispersion plate 9 are both in a round cake shape, the thickness of the round cake-shaped dispersion plate is gradually reduced from the center to the edge, and the dispersion area is increased on the basis of ensuring the pressure resistance of the dispersion plate; dispersing blades 10 are fixed on the outer peripheral wall of the first dispersing disc 8 and the outer peripheral wall of the second dispersing disc 9 along the corresponding circumferential direction; a plurality of through holes 11 which penetrate through the corresponding dispersion discs are uniformly formed in the first dispersion disc 8 and the second dispersion disc 9, and all the through holes in the first dispersion disc 8 are staggered with all the through holes in the second dispersion disc 9; guide holes 12 are formed in the upper and lower parts of the first threaded sleeve 5 and the upper and lower parts of the second threaded sleeve 6, wherein the upper guide hole of the first threaded sleeve 5 and the upper guide hole of the second threaded sleeve 6 are coaxially arranged and penetrate through the same upper guide rod 13, the lower guide hole of the first threaded sleeve 5 and the lower guide hole of the second threaded sleeve 6 are coaxially arranged and penetrate through the same lower guide rod 14; the upper guide rod 13 and the lower guide rod 14 are fixed in the horizontal tank body 1 in a welding mode; a feed hopper 15 is fixed at the upper part of one side of the horizontal tank body 1, the feed hopper 15 is communicated with the cavity in the horizontal tank body, and the top opening of the feed hopper 15 is sealed by a sealing cover when the feed is not fed; a vacuumizing tube 16 is also fixed on the horizontal tank body 1, the vacuumizing tube 16 is communicated with the cavity in the horizontal tank body 1, and one end of the vacuumizing tube 16 is connected with a vacuumizing pump; a discharge pipe 17 is fixed at the bottom of one side of the horizontal tank body 1, and during discharge, the material is pumped in a negative pressure mode; an inverted L-shaped pipe 18 is fixedly connected and communicated with the discharging pipe 17 and positioned in the horizontal tank body 1, and a pipe orifice at the bottom of the inverted L-shaped pipe 18 is close to the inner bottom of the horizontal tank body. In the process that the rotary motor 4 drives the bidirectional screw to rotate, the threaded sleeve can only do linear movement due to the existence of the guide rod, however, in the moving process, the dispersing blades of the dispersing disk are subjected to resistance, so that the dispersing disk can rotate relative to the threaded sleeve, in the moving process, liquid flow in the horizontal tank body 1 collides with the second dispersing disk or the inner wall of the horizontal tank body 1 after passing through the through hole in the first dispersing disk, and is also dispersed after passing through the through hole in the second dispersing disk or collides with the first dispersing disk or the inner wall of the horizontal tank body 1, and the rotation of the dispersing disk gives a certain shearing force to the liquid flow, so that the dispersing effect is further enhanced.
The peripheral wall of the horizontal tank body 1 is a hollow interlayer wall, the bottom of one side of the hollow interlayer wall is fixedly connected and communicated with a drain pipe 19, a drain groove 21 is formed in the base 2 and one side of the horizontal tank body 1, the drain pipe 19 penetrates through a mounting groove formed in a corresponding position on the base 2 and then extends into the drain groove 21, and a water faucet is fixedly connected to the end part of one end, located in the drain groove 19, of the drain pipe 19; the upper part of one side of the hollow interlayer wall of the horizontal tank body 1 is fixedly connected and communicated with a water inlet pipe 20. In the dispersing process, hot water with a certain temperature is introduced into the hollow of the peripheral wall of the hollow interlayer of the bedroom tank body 1 to ensure the dispersing effect, and after the dispersing is finished, the hot water is discharged, and cold water can be introduced to cool the dispersing liquid.
Example one
The pure water gravure ink of the embodiment is composed of the following raw materials by weight percent: 50% of water-soluble polyester resin, 11.7% of water-based pigment, 3% of water-based dispersant, 0.3% of water-based defoamer, 5% of water and 30% of edible alcohol.
The aqueous dispersant is TG-F0521 from Tegaga barge (Beijing) science and technology Limited. The water-based defoaming agent is selected from organosilicone defoaming agents in the prior art. The water-soluble polyester resin is a commercially available product such as WLR-6600 produced by Deqingyurt synthetic resins Co.
The production process of the pure water gravure ink of the embodiment includes the following steps:
(1) preparation of water-based pigment: preparing 50% of organic pigment, 2% of dispersing agent, 3% of propylene glycol, 2% of pH regulator and the balance of deionized water according to mass percentage, and ball-milling the organic pigment to a nanometer level in advance; then adding the organic pigment and the wetting agent with the formula dosage into deionized water, and uniformly dispersing by adopting a rotary-pulp dispersion disc to obtain a pigment dispersion system; adding the dispersant with the formula dosage into a pigment dispersion system, homogenizing by ultrasonic waves, and adding a pH regulator until the pigment is neutral;
(2) preparing gravure ink: weighing each raw material according to the formula for standby, fully mixing the water-soluble polyester resin, the water-based dispersant, the water-based defoamer, water and edible alcohol in the formula, grinding the mixture until the fineness is below 5 mu m to obtain a base material, finally adding the water-based pigment, preliminarily mixing the mixture for 3min at 600 revolutions per minute by adopting a conventional propeller type dispersion disc, then sending the mixture into a horizontal tank body 1 which is vacuumized in advance through a feed hopper 15, then sealing the feed hopper 15, plugging a discharge pipe 17 by using a pipe plug, starting a driving motor 4 to rotate forwards to drive a first dispersion disc 8 and a second dispersion disc 9 to move close together, starting the driving motor 4 to rotate backwards to drive the first dispersion disc 8 and the second dispersion disc 9 to move away from each other, circulating the steps until the dispersion of the mixed material is completed, vacuumizing once every 10min in the dispersion process, and stopping driving the motor 4 during vacuumizing to obtain the product.
Example two
The pure water gravure ink of the embodiment is composed of the following raw materials by weight percent: 45% of water-soluble polyester resin, 15% of water-based pigment, 3% of water-based dispersant, 0.1% of water-based defoaming agent, 10% of water and 26.9% of edible alcohol.
The aqueous dispersant is TG-F0521 from Tegaga barge (Beijing) science and technology Limited. The water-based defoaming agent is selected from organosilicone defoaming agents in the prior art. The water-soluble polyester resin is a commercially available product such as WLR-6600 produced by Deqingyurt synthetic resins Co.
The production process of the pure water gravure ink of the embodiment includes the following steps:
(1) preparation of water-based pigment: preparing 30% of organic pigment, 3% of dispersant, 2% of propylene glycol, 1% of pH regulator and the balance of deionized water according to mass percentage, and ball-milling the organic pigment to a nanometer level in advance; then adding the organic pigment and the wetting agent with the formula dosage into deionized water, and uniformly dispersing by adopting a rotary-pulp dispersion disc to obtain a pigment dispersion system; adding the dispersant with the formula dosage into a pigment dispersion system, homogenizing by ultrasonic waves, and adding a pH regulator until the pigment is neutral;
(2) preparing gravure ink: weighing each raw material according to the formula for standby, fully mixing the water-soluble polyester resin, the water-based dispersant, the water-based defoamer, water and edible alcohol in the formula, grinding the mixture until the fineness is below 5 mu m to obtain a base material, finally adding the water-based pigment, preliminarily mixing the mixture for 3min at 600 revolutions per minute by adopting a conventional propeller type dispersion disc, then sending the mixture into a horizontal tank body 1 which is vacuumized in advance through a feed hopper 15, then sealing the feed hopper 15, plugging a discharge pipe 17 by using a pipe plug, starting a driving motor 4 to rotate forwards to drive a first dispersion disc 8 and a second dispersion disc 9 to move close together, starting the driving motor 4 to rotate backwards to drive the first dispersion disc 8 and the second dispersion disc 9 to move away from each other, circulating the steps until the dispersion of the mixed material is completed, vacuumizing once every 10min in the dispersion process, and stopping driving the motor 4 during vacuumizing to obtain the product.
The ink disclosed by the invention is good in storage stability, and generally does not agglomerate or delaminate for two years in a low-temperature (15-20 ℃) closed environment.

Claims (5)

1. The pure water gravure ink is composed of the following raw materials in percentage by weight: 35-50% of water-soluble polyester resin, 10-15% of water-based pigment, 1-3% of dispersing agent, 0.01-0.3% of defoaming agent, 5-10% of water and 15-30% of edible alcohol.
2. The process for producing pure water gravure ink according to claim 1, comprising the steps of:
(1) preparation of water-based pigment: preparing 15-50% of organic pigment, 0.5-3% of dispersing agent, 1-3% of propylene glycol, 1-2% of pH regulator and the balance of deionized water according to mass percentage, and ball-milling the organic pigment to nano level in advance; then adding the organic pigment and the wetting agent with the formula dosage into deionized water, and uniformly dispersing by adopting a rotary-pulp dispersion disc to obtain a pigment dispersion system; adding the dispersant with the formula dosage into a pigment dispersion system, homogenizing by ultrasonic waves, and adding a pH regulator until the pigment is neutral;
(2) preparing gravure ink: weighing the raw materials according to the formula for later use, fully mixing the water-soluble polyester resin, the water-based dispersing agent, the water-based defoaming agent, the water and the edible alcohol in the formula, grinding the mixture to the fineness of less than 5 mu m to obtain a base material, finally adding the water-based pigment, and dispersing the mixture under the vacuum sealing condition to obtain the pigment.
3. The production process of pure water gravure ink according to claim 2, wherein in the preparation step of the gravure ink, the dispersion process is performed in a specially-made vacuum dispersion device, the specially-made vacuum dispersion device comprises a horizontal tank body, the horizontal tank body is fixed on a base, a bidirectional screw is fixed at the center in the horizontal tank body, the outer peripheral wall of one end of the bidirectional screw is smooth and is fixed on the inner wall of the horizontal tank body through a bearing, the outer peripheral wall of the other end of the bidirectional screw is also smooth and is fixedly connected with a power output shaft of a driving motor after penetrating through the side wall of the horizontal tank body, and the end of the bidirectional screw, which is connected with the driving motor, is connected with the corresponding part of the horizontal tank body through a; a first threaded sleeve and a second threaded sleeve are respectively in threaded fit on two sections of left-handed thread sections and right-handed thread sections with opposite rotation directions of the bidirectional screw rod, an annular groove is formed in the outer peripheral wall of the first threaded sleeve and is in sliding fit with a first dispersion disc through the annular groove, and an annular groove is also formed in the outer peripheral wall of the second threaded sleeve and is in sliding fit with a second dispersion disc through the annular groove; the first dispersion disc and the second dispersion disc are both in a round cake shape, the thickness of the round cake-shaped dispersion disc is gradually reduced from the center to the edge, and dispersion blades are fixed on the outer peripheral wall of the first dispersion disc and the outer peripheral wall of the second dispersion disc along the corresponding circumferential direction; a plurality of through holes penetrating through the corresponding dispersion discs are uniformly formed in the first dispersion disc and the second dispersion disc, and all the through holes in the first dispersion disc are staggered with all the through holes in the second dispersion disc; guide holes are formed in the upper portion and the lower portion of the first threaded sleeve and the upper portion and the lower portion of the second threaded sleeve respectively, the upper portion guide hole of the first threaded sleeve and the upper portion guide hole of the second threaded sleeve are coaxially arranged and penetrate through the same upper portion guide rod, the lower portion guide hole of the first threaded sleeve and the lower portion guide hole of the second threaded sleeve are coaxially arranged and penetrate through the same lower portion guide rod; a feed hopper is fixed at the upper part of one side of the horizontal tank body, the bottom of the feed hopper is communicated with the cavity in the horizontal tank body, and the top opening of the feed hopper is sealed by a sealing cover when the feed hopper is not used for feeding; a vacuumizing tube is also fixed on the horizontal tank body, the vacuumizing tube is communicated with the cavity in the horizontal tank body, and one end of the vacuumizing tube is connected with a vacuumizing pump; a discharging pipe is fixed at the bottom of one side of the horizontal tank body, an inverted L-shaped pipe is fixedly connected and communicated with the inside of the horizontal tank body on the discharging pipe, and a bottom pipe opening of the inverted L-shaped pipe is close to the bottom inside the horizontal tank body.
4. The production process of pure water gravure ink according to claim 3, wherein the peripheral wall of the horizontal tank body is a hollow interlayer wall, the bottom of one side of the hollow interlayer wall is fixedly connected and communicated with a drain pipe, a drain groove is formed in the base and positioned on one side of the horizontal tank body, the drain pipe penetrates through an installation groove formed in a corresponding position on the base and then extends into the drain groove, and a water tap is fixedly connected to the end part of one end of the drain pipe and positioned in the drain groove; the upper part of one side of the hollow interlayer wall of the horizontal tank body is fixedly connected and communicated with a water inlet pipe.
5. The production process of pure water gravure ink according to claim 3, wherein the dispersion step in the preparation step of gravure ink is specifically performed by adding water-based pigment to the ground base material, preliminarily mixing the water-based pigment and the ground base material, feeding the mixture into a horizontal tank body which is evacuated in advance through a feed hopper, closing the feed hopper, plugging a discharge pipe with a pipe plug, starting a driving motor to rotate forward to drive a first dispersion plate and a second dispersion plate to close together, starting a driving motor to rotate backward to drive the first dispersion plate and the second dispersion plate to separate from each other, circulating the operation until the mixture is dispersed, evacuating the mixture once at intervals during dispersion, and stopping the driving motor during evacuation.
CN202010990607.4A 2020-09-19 2020-09-19 Pure water gravure ink and production process thereof Pending CN112063230A (en)

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Application publication date: 20201211