KR20190033312A - Selecting apparatus for super absorbent polymer - Google Patents

Abstract

Disclosed is an SAP sorting apparatus. A super absorbent polymer (SAP) sorting device includes: a body in which an elevation bar, which is lifted or lowered, is installed; a container installed at a lower portion of the elevation bar in the body and having an accommodation space accommodating an absorber formed therein; an operation unit connected to the elevation bar, in which an elevation plate which is lifted or lowered in the accommodation space to press the absorber is installed at a lower portion thereof, and in which an injection part for injecting salt water is formed in the direction of the absorber; a diffusion measuring unit which measures the state in which the salt water is diffused in the absorber; and a control unit which is installed in the body, and measures the state in which the salt water is absorbed in the absorber and the state in which the salt water is diffused in the absorber in which the salt water is injected into the absorber. The absorber is a SAP or a SAP-Fluff composite. The control unit measures a first height value at which the salt water is absorbed by the SAP and a second height valve at which the salt water is absorbed by the SAP-Fluff composite, and can identify that the SAP is in a normal state if a difference between the first height value and the second height value is less than a first preset distance and a diffusion distance of the SAP-Fluff measured by the diffusion measuring unit is less than a second preset distance. Accordingly, it is possible to sort a SAP in an excellent quality state.

Description

{SELECTING APPARATUS FOR SUPER ABSORBENT POLYMER}

The present invention relates to an SAP sorting apparatus for sorting SAP (Super Absorbent Polymer) having superior quality.

In general, Super Absorbent Polymer (SAP) has begun to be put into practical use as a physiological tool, and nowadays, in addition to sanitary articles such as diapers for children, it is also used as a soil remediation agent for gardening, index material for civil engineering and construction, And is widely used as a freshness-retaining agent in the field and as a material for fomentation.

BACKGROUND ART Superabsorbent polymer resins are widely used in sanitary materials such as diapers and sanitary napkins.

Such a superabsorbent polymer resin not only has to exhibit a water absorption capacity higher than a certain level for hygiene purposes but also re-absorbs the water once absorbed, despite the external pressure, for example, the pressure due to the body weight of the diaper wearer It is necessary to indicate characteristics that are not allowed.

Therefore, an appropriate evaluation of the absorption or diffusion performance of the superabsorbent polymer resin is required.

As a method of evaluating the absorption or diffusion performance of such a superabsorbent polymer resin, a method using a weight difference before and after absorption of a fluid or a method of measuring an absorption characteristic using a laser scan was used.

In addition, the diffusion evaluation method was a method of measuring the diffusion length of the fluid on the SAP applied in the transverse direction.

However, the tactical evaluation method has a problem in that there is a limit in simulating characteristics of an actual diaper in which absorption and diffusion occur at the same time.

Also, when the diaper is manufactured in the form of a mixture of SAP and soft fluff, the characteristics of the cotton greatly affect the performance of the diaper.

Therefore, it is important to evaluate not only the properties of SAP alone, but also the properties of the SAP complex. However, as a conventional evaluation device, only SAP evaluation is possible, and there is a problem that evaluation of the SAP complex is impossible.

In addition, the diaper is manufactured in a state in which the super absorbent polymer resin (SAP) is mixed with the soft cotton (Fluff), and there is little correlation with the reewet amount of the saline absorbed in the super absorbent polymer resin. Therefore, conventionally, there is a problem that it is difficult to appropriately select a superabsorbent polymer resin having a low amount of reewet by evaluating a superabsorbent polymer resin and an SAP-Fluff complex.

An object of the present invention is to provide an SAP screening apparatus capable of selecting a superabsorbent polymer resin (SAP) having excellent quality.

In accordance with an embodiment of the present invention, there is provided a lifting and lowering device comprising: a main body having a lifting bar that is lifted or lowered; a container portion provided at a lower portion of the lifting bar of the main body; An operating part provided with an elevating plate for raising or lowering the inside of the absorber and for injecting saline into the absorber, a diffusion measuring part for measuring the state of saline water diffused into the absorber, And a controller for measuring a state of being absorbed by the absorber and measuring a state of diffusion of the absorber in a state where the saline is injected into the absorber.

The absorber may be a superabsorbent polymer (SAP) or SAP-Fluff complex.

The control unit measures a first height value at which saline water is absorbed by the superabsorbent polymer resin, measures a second height value at which salt water is absorbed by the SAP-Fluff complex, and calculates a difference between the first height value and the second height value Is less than the first set distance and the diffusion distance of the SAP-Fluff composite measured by the diffusion measuring unit is less than the second set distance, it can be confirmed as a normal state of the superabsorbent polymer resin.

The first set distance may be 0.7 mm.

The second set distance is that the size of the SAP-Fluff complex is 100 mm by 20 mm and the brine can be 3.9 cm at 1.4 g.

The container portion may be formed of a transparent material such that the upper portion is opened and the operation portion is raised or lowered into the receiving space.

The operation part may include an injection body connected to one end of the lifting bar and formed with an injection part, and a lifting plate connected to the other side of the injection body and the bottom part contacting the absorption body.

The injection body may be formed with an injection hole for injecting salt water into the side surface thereof, and an injection part through which the salt water is discharged by communicating with the injection hole may be protruded below the injection body.

The lifting plate may be connected to the side surface of the injection body so that the injection portion is penetrated, and the bottom surface may contact the absorbent body.

The diffusion measuring section may include a camera for photographing a state in which saline water diffuses inside the absorber.

According to one embodiment of the present invention, it is easily confirmed whether or not the reewet amount (Rewet) of the saline absorbed in the superabsorbent polymer resin is within the set reference range, thereby effectively selecting the superabsorbent polymer resin in the normal quality state It is possible. Therefore, the steady state of the superabsorbent polymer resin used in the diaper can be easily selected, and it becomes possible to develop a diaper excellent in feeling of use.

1 is a perspective view of a main part of the SAP sorting apparatus according to an embodiment of the present invention.
Fig. 2 is a cross-sectional view of the main part schematically showing a state in which the operating section is installed in the container section of Fig. 1;
FIG. 3 is a cross-sectional view of a main part schematically showing a state in which salt water is absorbed and absorbed into the absorber accommodated in the container portion of FIG. 2. FIG.
FIG. 4 is a cross-sectional view of the main part schematically showing a state in which salt water is diffused into the absorber accommodated in the container portion of FIG. 2. FIG.
5 is a diagram schematically showing the saline average diffusion distance of the SAP-Fluff composite and the absorption height difference of the SAP-Fluff composite and the superabsorbent polymer resin among a plurality of products according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

FIG. 2 is a cross-sectional view of a main part schematically showing a state in which an operation unit is installed in the container unit of FIG. 1, and FIG. 3 is a cross- FIG. 4 is a cross-sectional view of the main part schematically showing a state in which salt water is diffused into the absorber accommodated in the container portion of FIG. 2. FIG.

1 to 4, the SAP screening apparatus 100 according to an embodiment of the present invention includes a main body 10 provided with a lifting bar 20 to be lifted or lowered, A container unit 30 provided at a lower portion of the bar 20 and having an accommodation space 31 in which an absorber 50 is accommodated is connected to the elevation bar 20, An operation part 40 provided with a lifting plate 43 which is raised or lowered to press the absorber 50 and has an injection part for injecting saline into the absorber 50; And a controller for measuring the state of the salt water being absorbed by the absorber and measuring the state of diffusion of the absorber (50) in the state where the salt water is injected into the absorber (50) (60).

The absorbent body 50 described below refers to a SAP (Super Absorbent Polymer) 50a or SAP-Fluff composite 50b used for diapers and the like.

Such an absorber 50 can be measured in the state of being placed in the container portion 30 in the following description. This will be described in detail below.

The body 10 is a rheometer for measuring the viscosity or the rheological property of a specimen. The body 10 is provided on the bottom surface of the installation site. The absorption and diffusion states of the absorber 50 are measured in a state in which the absorber 50 is accommodated Lt; / RTI > In the body 10, a measurement space 11 for measurement of the absorption and diffusion states can be formed in a state that the absorber 50 is accommodated. The measurement space 11 may be provided with a lifting bar 20 which is operated to move up or down.

The lifting bar 20 can be raised or lowered in the measurement space 11 by a driving unit (not shown) installed in the main body 10. [ A container portion 30, in which the absorber 50 is received, may be installed below the lifting bar 20.

The container unit 30 may be installed inside the main body 10 in a state in which the upper portion of the container unit 30 is opened and a receiving space 31 in which the absorber 50 is received. In the container 30, the actuating part 40, which is lifted and lowered by the lifting bar 20 in a state in which the absorber 50 is accommodated, can be installed up or down.

The operation part 40 is connected to the lifting bar 20 and is provided with a lifting plate 43 for selectively lifting up or lowering the inside of the accommodation space 31 to selectively pressurize the absorbing body 50, ) Direction, as shown in FIG.

More specifically, the actuating part 40 includes an injection body 41, one end of which is connected to an end of the lifting bar 20 and has an injection part 42, And the lifting plate 43 contacting the absorber 50.

One side of the injection body 41 is fixed to the end of the lifting bar 20 and can be integrally or detachably fixed in a cylindrical shape. Of course, the injection body 41 is not necessarily limited to a cylindrical shape, but may be modified into a suitable shape by a polygon or the like.

The injection body 41 is fixed to the end of the lifting bar 20 and may be formed with an injection part 42 into which the salt water 44 is injected. Here, the salt water 44 may be a solution in which a dye is dispersed in physiological saline solution (0.9 wt% sodium chloride solution) so as to facilitate visual observation, but is not limited thereto.

The injection part 42 protrudes from the lower part of the injection body 41, and a discharge passage may be formed to discharge the brine 44 into the injection part 42. An injection hole 41a may be formed in a side surface of the injection body 41 so that the brine can be discharged through the injection part 42. [ Therefore, the brine can be injected through the injection hole 41a and discharged in the direction of the absorber 50 from the injection part 42. [

A lift plate 43 may be installed on the injection body 41.

The lifting plate 43 is provided at a lower portion of the injection body 41 and may be formed to have a size corresponding to the area of the plane of the accommodation space 31 of the container portion 30. [ The elevating plate 43 is provided at the lower portion of the injection body 41 to selectively press the absorber 50 in conjunction with the upward or downward movement of the elevating bar 20. [ Here, the pressing force of the lifting plate 43 can be increased to 17 psi.

The elevating plate 43 may be rotatably installed at the injection body 41 at a constant angular velocity.

The use of the lifting plate 43 to pressurize the absorbent body 50 is intended to suitably implement a sitting or lying state in a state in which the user wears the diaper.

The state in which the salt water 44 is injected into the container portion 30 through the operation portion 40 and absorbed into the absorption body 50 can be measured by the control portion 60. [

The control unit 60 can measure the height difference in which the brine 44 is absorbed by each of the superabsorbent polymer resin 50a and the SAP-Fluff complex 50b or the diffusion distance at which the brine is diffused.

The measurement of the height difference or the diffusion distance at which the controller 60 absorbs saline in the SAP resin 50a and the SAP-Fluff complex 50b can be performed by measuring the height difference or the diffusion distance of the superabsorbent polymer resin 50a used in the diaper This is to confirm whether or not the user is in a normal state with excellent feeling. This will be described in detail below.

First, the controller 60 measures a first height value at which the brine 44 is absorbed by the superabsorbent polymer resin 50a.

Here, the control unit 60 can measure the change in height absorbed by the superabsorbent polymer resin 50a using the rheometer of the main body.

That is, in the rheometer, the height of the lifting plate 43 is automatically measured based on the swelling of the saline absorbed by the absorber 50 using the height difference that is increased before the swelling of the absorber 50 can do.

Next, the controller 60 measures the second height value at which the brine is absorbed into the SAP-Fluff complex 50b. Here, the second height value can be automatically measured using a rheometer, as described above.

As described above, the control unit 60 confirms the measured values of the first height value and the second height value, which are absorbed in each of the superabsorbent polymer resin 50a and the SAP-Fluff complex 50b, And the second height value can be derived.

That is, the controller 60 can check whether the difference between the first height value and the second height value is less than the first set distance. In this way, if the difference between the first height value and the second height value is less than the first predetermined distance, the control unit can confirm the diffusion distance at which salt water is absorbed and diffused by the SAP-Fluff composite 50b. Of course, the control unit 60 can appropriately change the order of checking the difference between the diffusion distance, the first height value, and the second height value.

Here, if the difference between the first height value and the second height value is 0.7 mm or less, the controller 60 can confirm that the first condition for confirming the steady state of the superabsorbent polymer resin 50a is satisfied.

Next, the control unit 60 receives a sensing signal of a diffusion distance, which is absorbed by the SAP-Fluff complex 50b in the diffusion measuring unit 70, to be diffused, and determines whether the diffusion distance is less than the predetermined second set distance Can be confirmed.

Here, the diffusion measuring unit 70 measures the diffusion state of the brine 44 into the SAP-Fluff complex 50b. The diffusion measuring unit 70 measures the diffusion of the brine 44 into the SAP-Fluff complex 50b The camera may include a camera. Hereinafter, the diffusion measuring unit and the camera use the same reference numerals.

In this way, it is possible to take an image of the diffusion of the brine 44 into the interior of the SAP-Fluff composite 50b using the camera 70, and to derive the diffusion distance through image analysis.

Here, the controller 60 receives the diffusion distance signal sensed by the camera 70, and can confirm whether the diffusion distance is less than the second predetermined distance 3.9 cm.

The diffusion distance at which the brine is diffused by using the camera 70 is measured when the size of the SAP-Fluff composite 50b is 100 * 20 mm in width and length, and the diffusion distance Is measured as an example.

As described above, when the difference between the first height value at which the brine is absorbed and the second height value is less than 0.7 mm, which is the first predetermined distance, and the brine 44 is introduced into the SAP- When the distance absorbed and diffused is less than 3.9 cm, which is the second predetermined distance, the steady state of the SAP (Super Absorbent Polymer) can be confirmed.

That is, it is possible to effectively select the superabsorbent polymer resin in the normal quality state by confirming that the rewet of the saline absorbed in the superabsorbent polymer resin 50a is within the set reference range.

Therefore, the steady state of the superabsorbent polymer resin 50a used in the diaper can be easily selected, and it becomes possible to develop a diaper excellent in feeling of use.

Absorption height difference (mm) Diffusion distance (cm) Rewet amount (g) Rewet criteria passed A 1.61 4.78 0.74 X B 1.05 3.98 0.57 X C 0.73 4.56 0.61 X D 0.3 3.23 0.44 O E 0.48 3.68 0.50 O

In the above table, the SAP-Fluff complex has an area of 100 * 20 mm in width and 1.4 g of brine, and the absorption height difference value between the SAP-Fluff composite 50b and the SAP- SAP-Fluff complex 50b. ≪ / RTI >

As shown in the above table, D and E can be confirmed under the condition that the absorption height difference is less than 0.7 mm and the diffusion distance is less than 3.9 cm in the comparison of physical properties of A to E, respectively.

5 is a diagram schematically showing the saline average diffusion distance of the SAP-Fluff composite and the absorption height difference of the SAP-Fluff composite and the superabsorbent polymer resin among a plurality of products according to an embodiment of the present invention.

As shown in Fig. 5, a good product group (C) satisfying the conditions of less than 0.7 mm in absorption height difference and less than 3.9 cm in diffusion distance can be confirmed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Of course.

10 ... body 11 ... measurement space
20 ... lifting bar 30 ... container portion
31 ... accommodating space 40 ... operating portion
41 ... injection body 41a .. injection hole
42 ... injection part 43 ... lifting plate
50 ... absorber 50a .. superabsorbent polymer resin
50b SAP-Fluff complex 60 ... control
70 ... diffusion measuring unit

Claims (8)

A main body having a lifting bar that is lifted or lowered;
A container unit installed at a lower portion of the elevating bar in the main body and having a receiving space in which an absorber is received;
An operating part connected to the elevating bar and provided at a lower part thereof with a lifting plate for raising or lowering the absorbing body in the accommodating space and injecting saline into the absorber;
A diffusion measuring unit for measuring a state where the saline solution is diffused into the absorber; And
A controller installed in the main body to measure a state where the saline solution is absorbed by the absorber and measure a state of diffusion of the absorber in a state where the saline solution is injected into the absorber;
Wherein the absorber is a superabsorbent polymer (SAP) or SAP-Fluff complex,
The control unit measures a first height value at which the brine is absorbed by the superabsorbent polymer resin and measures a second height at which the brine is absorbed by the SAP-Fluff complex, 2 height value is less than the first set distance,
Absorbing polymer resin when the diffusion distance of the SAP-Fluff composite measured by the diffusion measuring unit is less than a second predetermined distance. The method according to claim 1,
And the first set distance is 0.7 mm. 3. The method of claim 2,
And the second set distance
The SAP-Fluff complex has an area of 100 mm width and 20 mm length and the brine is 3.9 cm at 1.4 g. The method according to claim 1,
Wherein the container portion is formed in such a manner that the upper portion is opened and the operating portion is raised or lowered into the receiving space, and the transparent portion is made of a transparent material. The method according to claim 1,
Wherein,
An injection body connected to one end of the lifting bar and having the injection part; And
A lift plate connected to the other side of the injection body and having a bottom surface in contact with the absorber;
/ RTI > 6. The method of claim 5,
Wherein the injection body has an injection hole for injecting the brine into the side surface thereof and an injection portion for communicating with the injection hole and discharging the brine from the injection hole. The method according to claim 6,
Wherein the lifting plate is connected to a side surface of the injection body so that the injection unit is penetrated and the bottom surface is in contact with the absorber. The method according to claim 1,
Wherein the diffusion measuring unit comprises a camera for photographing a state in which the brine is diffused inside the absorber.

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