KR102079338B1 - Shredder for super adsorbent polymer and preparation method of super absorbent polymer using the same - Google Patents

Abstract

The present invention relates to a pulverizing device for super absorbent polymer and a method for producing a superabsorbent polymer using the same.
To this end, the superabsorbent polymer crushing apparatus according to an embodiment of the present invention is a superabsorbent polymer crushing apparatus for pulverizing the plate-shaped superabsorbent resin to be discharged to the discharge container, the inlet for injecting the superabsorbent resin A housing comprising; First and second fixed blades configured to correspond to each other at both sides of the inlet of the housing to guide the introduction of the superabsorbent polymer; A drum unit which is configured inside the housing and includes two or more rotating drums in which rotation directions of neighboring rotating drums are opposite; And a plurality of rotary blades configured at regular intervals along each outer circumferential surface of the rotary drum to cut the super absorbent polymer together with the first and second fixed blades.

Description

Crushing device for super absorbent polymer and manufacturing method of super absorbent polymer using same {SHREDDER FOR SUPER ADSORBENT POLYMER AND PREPARATION METHOD OF SUPER ABSORBENT POLYMER USING THE SAME}

The present invention relates to a pulverizing device for super absorbent polymer and a method for producing a super absorbent polymer using the same.

Super Absorbent Polymer (SAP) is a synthetic polymer material capable of absorbing water of 500 to 1,000 times its own weight.As a developer, super absorbent material (SAM) and absorbent gel (AGM) They are named differently. Such super absorbent polymers have been put into practical use as sanitary devices, and are currently used in sanitary products such as paper diapers for children, horticultural soil repair agents, civil engineering, building index materials, seedling sheets, freshness retainers in food distribution, and It is widely used as a material for steaming.

As a method for producing such a super absorbent polymer, a method by reverse phase suspension polymerization or a method by aqueous solution polymerization is known. Reverse phase suspension polymerization is disclosed in, for example, Japanese Patent Laid-Open Nos. 56-161408, 57-158209, and 57-198714. As the method of aqueous solution polymerization, a thermal polymerization method for breaking and cooling the hydrogel polymer in a kneader having several shafts, and photopolymerization for simultaneously performing polymerization and drying by irradiating ultraviolet rays or the like on a belt with a high concentration of aqueous solution Methods and the like are known.

The hydrous gel polymer obtained through the polymerization reaction as described above is generally pulverized through a drying process and marketed as a powder product. In order to efficiently carry out the drying step as described above, it is important to make the surface area of the hydrogel polymer as large as possible. Therefore, in order to increase the surface area of the hydrogel polymer before the drying process, it is possible to consider a method of increasing the surface area of the hydrogel polymer to be dried by simply pulverizing the hydrogel polymer polymerized by thermal polymerization or photopolymerization. In order to increase the surface area of the hydrogel polymer as described above, a process of primarily grinding the hydrogel polymer after polymerization thereof is disclosed.

However, in the conventional case, the plate-like superabsorbent polymer produced primarily has been pulverized by slicing into a predetermined shape, but in the process of cutting the superabsorbent resin, it is cut in chunks or flowed into a torn state in the upper process to be uniform. It is difficult to be crushed to one size, a problem that the productivity is lowered.

Matters described in this Background section are intended to enhance the understanding of the background of the invention, and may include matters other than the prior art already known to those skilled in the art.

Embodiments of the present invention provide a superabsorbent polymer pulverizing apparatus capable of pulverizing superabsorbent polymer uniformly by changing the angle of grinding the superabsorbent polymer and the shape of the rotary blade, and a method of manufacturing the superabsorbent polymer using the same.

In addition, an embodiment of the present invention provides a superabsorbent polymer pulverizing apparatus capable of reducing the tearing shape of the superabsorbent polymer upon pulverization by adjusting the angle of milling the superabsorbent polymer, and a method of preparing the superabsorbent polymer using the same.

In one embodiment of the present invention, the superabsorbent polymer crushing apparatus for pulverizing the plate-shaped superabsorbent resin to be discharged to the discharge container, the housing comprising a inlet for injecting the superabsorbent resin; First and second fixed blades configured to correspond to each other at both sides of the inlet of the housing to guide the introduction of the superabsorbent polymer; A drum unit which is configured inside the housing and includes two or more rotating drums in which rotation directions of neighboring rotating drums are opposite; And a plurality of rotary blades configured at regular intervals along each outer circumferential surface of the rotary drum to cut the super absorbent polymer together with the first and second fixed blades.

In addition, the first and second fixed blades may be inclined at both sides of the inlet.

In addition, the first and the second fixed blade may be installed to be inclined in a V shape on both sides of the inlet.

In addition, the superabsorbent polymer may be introduced through the inlet between the first and second fixed blades.

In addition, the first and second fixed blades may be formed as blades with an acute edge corresponding to each other.

In addition, the drum unit may be formed by arranging four or more rotation drums rotating in one direction and rotation drums rotating in the other direction in the width direction.

In addition, the rotary blade may protrude toward the rotation direction of the rotary drum in the upper end and the lower end may be formed blade.

In addition, the rotary blade is a rectangular parallelepiped body; And a blade portion protruding sharply toward the rotation direction on each of an upper end portion and a lower end portion of the one surface of the body.

In addition, the blade portion of the rotary blade cutting the superabsorbent resin in the transverse direction together with the blade portion of the fixed blade corresponding to the rotation direction, characterized in that the superabsorbent resin grinding device.

In addition, the rotary blade may cut the superabsorbent polymer in the longitudinal direction together with the rotary blade formed in the adjacent rotary drum rotating in the opposite direction.

In addition, the width of the rotary blade may be set within the range of 5mm ~ 7mm.

And another embodiment of the present invention comprises the steps of preparing a monomer composition comprising a water-soluble ethylenically unsaturated monomer and a polymerization initiator; Preparing a plate-like superabsorbent polymer by irradiating the monomer composition with ultraviolet radiation or supplying heat; Supplying the plate-shaped superabsorbent resin to the pulverizing apparatus for superabsorbent polymer according to claim 1, and pulverizing it; And it may provide a method for producing a super absorbent polymer comprising the step of drying the pulverized super absorbent polymer.

According to the embodiment of the present invention, the superabsorbent polymer may be uniformly pulverized by changing the shape of the rotary blade, thereby improving productivity.

In addition, it is possible to reduce the tearing shape of the super absorbent polymer during grinding by adjusting the angle of grinding the superabsorbent polymer, thereby increasing the overall efficiency of the manufacturing process.

In addition, the effects that can be obtained or predicted by the embodiments of the present invention will be disclosed directly or implicitly in the detailed description of the embodiments of the present invention. That is, various effects predicted according to an embodiment of the present invention will be disclosed in the detailed description to be described later.

1 is a cross-sectional view showing a super absorbent polymer crushing apparatus according to an embodiment of the present invention.
2 is a perspective view showing a super absorbent polymer crushing apparatus according to an embodiment of the present invention.
3 is a perspective view showing a drum unit according to an embodiment of the present invention.
4 is a cross-sectional view showing a first fixed blade and a second fixed blade according to an embodiment of the present invention.
5 is a perspective view showing a rotary blade according to an embodiment of the present invention.
6 is an enlarged perspective view of the rotary blade and the fixed blade according to an embodiment of the present invention.
7 is a flowchart illustrating a method of preparing a super absorbent polymer according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings and description will be described in detail the operating principle of the embodiment of the superabsorbent resin crushing apparatus and a method for producing a super absorbent polymer using the same. However, the drawings shown below and the following detailed description relate to one preferred embodiment of various embodiments for effectively explaining the features of the present invention. Therefore, the present invention should not be limited only to the following drawings and descriptions.

In addition, in the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. Terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to intentions or customs of users or operators. Therefore, the definition should be made based on the contents throughout the present invention.

In addition, the following embodiments will be used to appropriately modify, integrate, or separate terms, such that those skilled in the art to which the present invention pertains may clearly understand the technical features of the present invention. The present invention is by no means limited thereto.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view showing a super absorbent polymer crushing apparatus according to an embodiment of the present invention, Figure 2 is a perspective view showing a super absorbent polymer crushing apparatus according to an embodiment of the present invention.

1 and 2, the superabsorbent polymer crushing apparatus 100 includes a housing 110, a first fixed blade 120, a second fixed blade 130, a drum unit 140, and a rotary blade 150. And a discharge container 170.

The housing 110 includes an inlet 115. Inlet 115 is a plate-shaped superabsorbent polymer 50 is injected, is formed on the upper portion of the housing (110).

The first fixed blade 120 and the second fixed blade 130 are configured at both sides of the inlet 115 of the housing 110. That is, the first fixed blade 120 and the second fixed blade 130 are configured to correspond to each other on both sides of the inlet 115 of the housing 110 to guide the introduction of the plate-shaped superabsorbent polymer 50.

Each of the first fixed blade 120 and the second fixed blade 130 is connected to the housing 110 through each of the first coupling portion 117 and the second coupling portion 119 configured in the housing 110. That is, the first fixed blade 120 is coupled to the first coupling portion 117 through welding or screw coupling and connected to one side of the housing 110. In addition, the second fixing blade 130 is coupled to the second coupling portion 119 by welding or screwing, and is connected to the other side of the housing 110.

The first fixed blade 120 and the second fixed blade 130 may be positioned above the drum unit 140, and may be spaced apart from the drum unit by a predetermined distance.

On the other hand, the inlet 115, the first fixed blade 120 and the second fixed blade 130 has been described with an example configured on the upper portion of the housing 110, for example, but is not limited to this, the plate-shaped superabsorbent resin ( If 50) can be crushed, the position formed is irrelevant.

The drum unit 140 is configured inside the housing 110. The drum unit 140 includes a first rotating drum 141 and a second rotating drum 143 having opposite rotation directions.

The drum unit 140 is rotated by a drive motor (not shown). The rotational speed of the drum unit 140 is the state of the plate-shaped superabsorbent polymer 50 to be crushed, the size of the first fixed blade 120 and the second fixed blade 130, the size of the rotary blade 150, etc. Reference can be made by those skilled in the art to set the required speed. Here, the state of the plate-shaped superabsorbent polymer 50 may include a dryness and thickness.

The rotary blade 150 is configured on the outer circumferential surface of the drum unit 140. That is, the rotary blade 150 may be configured in plurality at an angle set along the rotation direction of the drum unit 140 on the outer circumferential surface of the drum unit 140.

Discharge container 170 is formed in the lower portion of the drum unit 140, the super absorbent resin piece 55 is crushed by the first fixed blade 120, the second fixed blade 130 and the rotary blade 150 is Is collected. The collected superabsorbent resin pieces 55 may be subjected to a post-treatment operation such as drying.

Although the discharge container 170 is shown in the lower portion of the drum unit 140 in Figure 1, the protection scope of the present invention is not necessarily limited thereto. For example, it will be readily understood by those skilled in the art that the discharge container 170 may be disposed at various positions as necessary, such as both sides of the drum unit 140.

3 is a perspective view showing a drum unit according to an embodiment of the present invention.

Referring to FIG. 3, the drum unit 140 includes two or more rotating drums. That is, the drum unit 140 includes two or more rotating drums in which rotation directions of neighboring rotating drums are opposite.

The drum unit 140 is formed by rotating the drum rotating in one direction and the drum rotating in the other direction as shown in Figure 3 adjacent to the width direction. Hereinafter, the rotating drum rotating in one direction will be referred to collectively as the first rotating drum 141 and the rotating drum rotating in the other direction will be referred to collectively as the second rotating drum 143.

The first rotating drum 141 may rotate counterclockwise, and the second rotating drum 143 may rotate clockwise.

Each of the first rotating drum 141 and the second rotating drum 143 is connected to a separate driving motor, and rotates by each driving motor. The rotation speed of the first rotating drum 141 and the second rotating drum 143 may be the same, and the rotation direction may be opposite.

Each of the first rotating drum 141 and the second rotating drum 143 is provided with a plurality of rotating blades 150.

The rotary blade 150 configured in each of the first rotary drum 141 and the second rotary drum 143 protrudes toward the traveling direction of each of the first rotary drum 141 and the second rotary drum 143 to form a blade 155. ) Is formed.

Meanwhile, the drum unit 140 includes four rotating drums, but the present invention is not limited thereto. When two or more rotating drums having opposite directions of rotation are included, the number of rotating drums is irrelevant. .

4 is a cross-sectional view showing a first fixed blade and a second fixed blade according to an embodiment of the present invention.

As shown in FIG. 4, the first fixed blade 120 and the second fixed blade 130 are configured to face each other. The first fixed blade 120 and the second fixed blade 130 are inclined on both sides of the inlet 115, respectively. For example, the first fixed blade 120 and the second fixed blade 130 may be installed to be inclined in a V shape on both sides of the inlet 115.

The first fixed blade 120 and the second fixed blade 130 each include a first blade portion 125 and a second blade portion 135. The first fixed blade 120 and the second fixed blade 130 are formed by the first blade portion 125 and the second blade portion 135 to form an acute angle corresponding to each other.

The first blade portion 125 of the first fixed blade 120 and the second blade portion 135 of the second fixed blade 130 are configured to face each other so that the plate-shaped superabsorbent polymer 50 is introduced.

5 is a perspective view showing a rotary blade according to an embodiment of the present invention.

Referring to FIG. 5, the rotary blade 150 is configured on an outer circumferential surface of each of the first rotary drum 141 and the second rotary drum 143, and includes a body 153 and a blade 155.

Body 153 is formed of a rectangular parallelepiped. The lower surface of the body 153 may be fixed and bonded to the outer circumferential surface of the rotating drum.

The blade 155 is formed to protrude toward the rotation direction of the rotary unit at the upper end and the lower end of the rotary blade 150. That is, the blade 155 is formed to protrude sharply toward the rotation direction of the rotary unit on each of the upper end and the lower end of one surface of the body 153. For example, the cross section of the blade 155 may be formed in a triangular shape. The reason why the blade 155 is sharply formed is to prevent the plate-like superabsorbent polymer 50 from being cut off in a lump.

Width W2 of the rotary blade 150 may be set within the range of 5mm ~ 7mm.

6 is an enlarged perspective view of the rotary blade 150 and the fixed blade according to an embodiment of the present invention.

Referring to Figure 6, the rotary blade 150 is disposed spaced apart a predetermined interval in the width direction of the drum unit 140.

The first fixed blade 120, the second fixed blade 130 and the rotary blade 150 is crushed plate-like superabsorbent resin by interaction. In other words, as the rotary blade 150 of the first rotary drum 141 rotates by the first rotary drum 141, the plate-shaped superabsorbent polymer 50 is crushed together with the first fixed blade 120. The absorbent resin piece 55 is produced. And as the rotary blade 150 of the second rotary drum 143 is rotated by the second rotary drum 143, the superabsorbent polymer is pulverized together with the second fixed blade 130 to crush the superabsorbent polymer piece 55. Create

The blade 155 of the rotary blade 150 cuts the plate-shaped superabsorbent polymer 50 in the horizontal direction together with the blades 125 and 135 of the fixed blades 120 and 130 corresponding to the rotational direction. That is, the rotary blade 150 of the first rotary drum 141 cuts the plate-shaped superabsorbent polymer 50 together with the first blade portion 125 of the first fixed blade 120 in the horizontal direction, and rotates the second rotation. The rotary blade 150 of the drum 143 cuts the plate-shaped superabsorbent polymer 50 together with the second blade 135 of the second fixed blade 130 in the horizontal direction.

The rotary blade 150 cuts the plate-shaped superabsorbent polymer 50 in the longitudinal direction together with the rotary blade 150 formed on the adjacent rotary drum rotating in the opposite direction. That is, the rotary blade 150 of the first rotary drum 141 cuts the plate-shaped superabsorbent polymer 50 along with the rotary blade 150 of the second rotary drum 143 in the longitudinal direction.

Accordingly, the superabsorbent polymer crushing apparatus 100 according to an embodiment of the present invention includes the rotary blades 150 and the first rotary drums 141 and the second rotary drums 143, respectively, whose rotation directions are opposite to each other. Since the plate-shaped superabsorbent polymer 50 is cut through the interaction between the 1st fixed blade 120 and the second fixed blade 130, it is possible to prevent the agglomeration from being cut and to cut the superabsorbent polymer into the same size. have.

Hereinafter, a method of manufacturing a super absorbent polymer will be described with reference to FIG. 7.

7 is a flowchart illustrating a method of preparing a super absorbent polymer according to an embodiment of the present invention.

Referring to FIG. 7, a method of preparing a super absorbent polymer according to an embodiment of the present invention prepares a monomer composition including a water-soluble ethylenically unsaturated monomer and a polymerization initiator (S710).

In this case, as the water-soluble ethylenically unsaturated monomer included in the monomer composition, any monomer commonly used in the production of superabsorbent polymers may be used without limitation. In general, any one or more selected from the group consisting of anionic monomers and salts thereof, nonionic hydrophilic-containing monomers, amino group-containing unsaturated monomers and quaternized compounds thereof can be used.

Specifically, acrylic acid, methacrylic acid, maleic anhydride, fumaric acid, crotonic acid, itaconic acid, 2-acryloylethane sulfonic acid, 2-methacryloylethanesulfonic acid, 2- (meth) acryloylpropanesulfonic acid, or 2 Anionic monomers of-(meth) acrylamide-2-methyl propane sulfonic acid and salts thereof; (Meth) acrylamide, N-substituted (meth) acrylate, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, methoxy polyethylene glycol (meth) acrylate or polyethylene glycol ( Nonionic hydrophilic-containing monomers of meta) acrylate; And an amino group-containing unsaturated monomer of (N, N) -dimethylaminoethyl (meth) acrylate or (N, N) -dimethylaminopropyl (meth) acrylamide and a quaternized product thereof. Can be used.

More preferably, acrylic acid or a salt thereof can be used. When acrylic acid or a salt thereof is used as a monomer, a super absorbent polymer having improved water absorption can be obtained. In addition, the content of the water-soluble ethylenically unsaturated monomer and the polymerization initiator in the monomer composition follows a conventional content range, and the configuration thereof is not limited.

The polymerization initiator may be used in different polymerization initiators depending on whether the polymerization method is thermal polymerization by heat supply or photopolymerization by ultraviolet irradiation. Among the polymerization initiators, at least one selected from the group consisting of persulfate initiators, azo initiators, hydrogen peroxide and ascorbic acid may be used. Specifically, examples of persulfate-based initiators include sodium persulfate (Na2S2O8), potassium persulfate (K2S2O8), ammonium persulfate (NH4) 2S2O8, and the like. Examples of initiators include 2, 2-azobis (2-amidinopropane) dihydrochloride, 2, 2-azobis- (N, N-dimethylene) isobu 2,2-azobis- (N, dimethylene) isobutyramidine dihydrochloride), 2- (carbamoyl azo) isobutyronitrile (2- (carbamoylazo) isobutylonitril), 2,2-azobis [2- (2-imidazolin-2-yl) propane] dihydrochloride (2,2-azobis [2- (2-imidazolin-2-yl) propane] dihydrochloride), 4,4-azobis- ( 4-cyanovaleric acid) (4,4-azobis- (4-cyanovaleric acid)). A wider variety of thermal initiators are well specified in Odian, "Principle of Polymerization (Wiley, 1981sus)", p203, and are not limited to the examples described above.

In addition, as the photopolymerization initiator, benzoin ether, benzoin ether, dialkyl acetophenone, hydroxyl alkylketone, phenyl glyoxylate, benzyl dimethyl ketal, One or more selected from the group consisting of acyl phosphine and alpha-aminoketone may be used. A wider variety of photoinitiators are well described in Reinhold Schwalm's book, "UV Coatings: Basics, Recent Developments and New Application (Elsevier 2007)", p115, and are not limited to the examples described above.

Ultraviolet radiation or heat is supplied to the monomer composition to prepare a plate-shaped superabsorbent resin 50 (S720). Specifically, after secreting the monomer composition, the prepared monomo composition is supplied to a polymerization reactor including a conveyor belt, and ultraviolet or heat is supplied to the monomer composition supplied on the conveyor belt to form a plate-shaped superabsorbent resin 50. You can get it.

The plate-shaped superabsorbent polymer 50 is supplied to the superabsorbent polymer pulverizing apparatus described with reference to FIGS. 1 to 6 and pulverized (S730). At this time, the width of the pulverized super absorbent polymer piece 55 may be 5 mm to 7 mm.

The super absorbent polymer pulverized through the super absorbent polymer crushing apparatus 100 is dried (S740). This drying step may proceed until the water content of the dried superabsorbent polymer is typically at least 10% by weight.

Thereafter, the dried super absorbent polymer may be pulverized second. At this time, as long as the crushing apparatus to be crushed in the secondary, if the apparatus is usually used in the powdering process of the particles, there is no limitation of the configuration. Specifically, a pin mill, a hammer mill, a screw mill, a roll mill, a disc mill, a jog mill, or the like may be used.

Although the above has been described with reference to a preferred embodiment of the present invention, those skilled in the art to which the present invention pertains without departing from the spirit and scope of the invention as set forth in the claims below It will be appreciated that modifications and variations can be made.

50: superabsorbent polymer
100: grinding apparatus for super absorbent polymer
110: housing
115: inlet
117, 119: coupling part
120, 130: fixed blade
140: drum unit
141, 143: rotating drum
150: rotary blade
170: discharge container

Claims (13)

In the super absorbent polymer crushing apparatus for pulverizing the plate-shaped superabsorbent polymer to be discharged to the discharge container
A housing including an inlet for injecting the super absorbent polymer;
First and second fixed blades configured to correspond to each other at both sides of the inlet of the housing to guide the introduction of the superabsorbent polymer;
A drum unit which is configured inside the housing and includes two or more rotating drums in which rotation directions of neighboring rotating drums are opposite; And
A plurality of rotary blades configured at regular intervals along each outer circumferential surface of the rotary drum to cut the super absorbent polymer together with the first and second fixed blades;
Including,
The first and second fixed blade is a grinding apparatus for super absorbent polymer which is installed inclined on both sides of the inlet. delete The method of claim 1,
The first and second fixed blade
Crushing device for super absorbent polymer, characterized in that the inlet is installed inclined in a V shape. The method of claim 1,
The super absorbent polymer is
Between the first and second fixed blade, the superabsorbent resin grinding device, characterized in that the input through the inlet. The method of claim 1,
The first and second fixed blade
Crushing device for super absorbent polymer, characterized in that the lower edge portion corresponding to each other is formed with a sharp angle. The method of claim 1,
The drum unit is
And a rotating drum rotating in one direction and at least four rotating drums rotating in the other direction adjacent to each other in the width direction. The method of claim 1,
The rotary blade
The upper end and the lower end of the superabsorbent resin grinding device, characterized in that the blade protrudes in the direction of rotation of the rotating drum. The method of claim 1,
The rotary blade
Cuboid body; And
Blades protruding sharply toward the rotation direction on each of the upper end and the lower end of the body;
A super absorbent pulverizing device comprising a. The method of claim 7, wherein
The blade portion of the rotary blade is a cutting device for super absorbent polymer, characterized in that for cutting the superabsorbent resin in the transverse direction together with the blade portion of the fixed blade corresponding to the rotation direction. The method of claim 1,
The rotary blade
A superabsorbent polymer grinding device, characterized in that for cutting the superabsorbent polymer in the longitudinal direction together with the rotary blade formed in the adjacent rotating drum rotating in the opposite direction. The method of claim 1,
Width of the rotary blade is characterized in that the grinding device for super absorbent polymer, characterized in that set within the range of 5mm ~ 7mm. Preparing a monomer composition comprising a water-soluble ethylenically unsaturated monomer and a polymerization initiator;
Preparing a plate-like superabsorbent polymer by irradiating the monomer composition with ultraviolet radiation or supplying heat;
Supplying the plate-shaped superabsorbent resin to the pulverizing apparatus for superabsorbent polymer according to claim 1 for pulverizing; And
Drying the pulverized super absorbent polymer;
Method for producing a super absorbent polymer comprising a. The method of claim 12,
Supplying the plate-shaped superabsorbent resin to the superabsorbent resin pulverizing apparatus according to claim 1, wherein the pulverizing step is performed so that the width of the pulverized superabsorbent resin is 5 mm to 7 mm. .

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