KR102342251B1 - Selecting apparatus for super absorbent polymer - Google Patents

Abstract

A SAP sorting device is disclosed. The SAP sorting device includes a main body provided with an elevating bar that rises or falls, a container unit installed under the elevating bar in the main body and having an accommodating space in which an absorber is accommodated, and the elevating bar connected to the elevating bar and rising from the inside of the accommodating space at the bottom Alternatively, a lifting plate that descends and pressurizes the absorber is installed, and an operation part for injecting salt water in the direction of the absorber is formed. and a control unit for measuring the state of being used and measuring the state of diffusion of the absorber in a state in which saline is injected into the absorber, the absorber being a super absorbent polymer (SAP, Super Absorbent Polymer) and SAP-Fluff composite, and the control unit, The first height value at which brine is absorbed into the superabsorbent polymer resin is measured, and the second height value at which brine is absorbed into the SAP-Fluff composite is measured, and the difference between the first height value and the second height value is set as the first If the distance is less than 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 that the superabsorbent polymer resin is in a normal state.

Description

SAP sorting device {SELECTING APPARATUS FOR SUPER ABSORBENT POLYMER}

The present invention relates to a SAP screening device for screening SAP (Super Absorbent Polymer) having excellent quality.

In general, Super Absorbent Polymer (SAP) started to be put to practical use as sanitary products, and now, in addition to hygiene products such as paper diapers for children, soil repair agents for gardening, water retention materials for civil engineering and construction, seedling sheets or food distribution It is widely used as a freshness maintenance agent in the field and as a material for poultice.

Super absorbent polymer resins are particularly widely used in the field of sanitary materials such as diapers and sanitary napkins.

Such a superabsorbent polymer resin should not only exhibit a certain level of moisture absorption for use as a sanitary material, but also release the moisture once absorbed in spite of external pressure, for example, the pressure caused by the weight of the diaper wearer. It is necessary to show characteristics that do not allow it.

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

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

In addition, as the diffusion evaluation method, the length of the diffusion of the fluid on the SAP applied in the horizontal direction was measured.

However, the above-described evaluation method has a problem in that it has limitations in simulating the characteristics of an actual diaper in which absorption and diffusion occur simultaneously.

In addition, when manufacturing a diaper, it is prepared in the form of a mixture of SAP and soft cotton (Fluff), so the characteristics of the cotton have a great influence on the diaper performance.

Therefore, it is important to evaluate not only the method for evaluating the properties of SAP alone, but also the properties of the SAP complex mixed with cotton. However, with the conventional evaluation device, only SAP alone evaluation is possible, and there is a problem in that it is impossible to evaluate the SAP complex.

In addition, since the diaper is manufactured in a state in which SAP and soft cotton are mixed, the correlation with the amount (Rewet) of saline absorbed in the superabsorbent polymer resin is insignificant. Therefore, there is a problem in that it is difficult to properly select a superabsorbent polymer resin with a small amount of rewet by evaluating the superabsorbent polymer resin and the SAP-Fluff composite.

An object of the present invention is to provide a SAP screening device capable of screening super-absorbent polymer (SAP) in excellent quality condition.

An embodiment of the present invention includes a main body in which a lifting or lowering bar is installed, a container part installed under the lifting bar in the main body and having an accommodating space in which an absorber is accommodated, and the lifting bar is connected to the lower portion of the accommodating space. A lifting plate is installed to pressurize the absorber by rising or lowering from the inside, and an operation part having an injection part for injecting salt water in the direction of the absorber is formed. and a control unit for measuring a state absorbed by the absorber and measuring a state of diffusion of the absorber in a state in which salt water is injected into the absorber.

The absorber may be a super absorbent polymer (SAP, Super Absorbent Polymer) and a SAP-Fluff composite.

The control unit measures a first height value at which brine is absorbed into the superabsorbent polymer resin, and measures a second height value at which brine is absorbed into the SAP-Fluff composite, the difference between the first height value and the second height value If 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 that the superabsorbent polymer resin is in a normal state.

The first set distance may be 0.7 mm.

The second set distance, the size of the SAP-Fluff complex may have an area of 100 mm in width and 20 mm in length, and 3.9 cm in salt water under 1.4 g conditions.

The container part is formed so that the upper part is opened so that the operation part rises or falls into the interior of the accommodation space, and may be made of a transparent material.

The operation unit may include an injection body having one side connected to the end of the lifting bar and formed with an injection unit, and a lifting plate connected to the other side of the injection body and having a bottom surface in contact with the absorber.

In the injection body, an injection hole for injecting salt water is formed on a side surface, and an injection part through which salt water is discharged through communication with the injection hole at the lower part may protrude.

The lifting plate may be connected to the side surface of the injection body so that the injection unit is penetrated, and the bottom surface may be in contact with the absorber.

The diffusion measuring unit may include a camera that captures a state in which salt water is diffused inside the absorber.

According to an embodiment of the present invention, it is easy to check whether the amount (Rewet) of the brine absorbed in the superabsorbent polymer resin is within the set reference range, and effectively selects the superabsorbent polymer resin in normal quality. it is possible Therefore, it is possible to easily select the normal state of the superabsorbent polymer resin used in the diaper, and thus it is possible to develop a diaper with excellent usability.

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

Hereinafter, with reference to the accompanying drawings, the embodiments of the present invention will be described in detail so that those skilled in the art can easily carry out the present invention. However, the present invention may be embodied in several different forms and is not limited to the embodiments described herein. In order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and the same reference numerals are assigned to the same or similar components throughout the specification.

1 is a perspective view schematically showing a main part of a SAP sorting apparatus according to an embodiment of the present invention, FIG. 2 is a main part cross-sectional view schematically showing a state in which an operation part is installed in the container of FIG. 1, FIG. 3 is FIG. It is a main cross-sectional view schematically showing a state in which saline is injected and absorbed into the absorber accommodated in the container of FIG.

1 to 4, the SAP sorting apparatus 100 according to an embodiment of the present invention includes a main body 10 in which a lifting or lowering bar 20 to be raised or lowered is installed, and elevating from the main body 10. It is installed in the lower part of the bar 20 and is connected to the container part 30 having an accommodating space 31 in which the absorber 50 is accommodated, and the elevating bar 20, and the lower part is in the accommodating space 31 . A lifting plate 43 that rises or descends to pressurize the absorber 50 is installed, and an operation part 40 with an injection part for injecting salt water in the direction of the absorber 50 is formed, and the state in which the salt water is diffused into the absorber 50 A diffusion measuring unit 70 to measure, and a control unit installed in the body 10 to measure the state in which the brine is absorbed by the absorber and measure the state in which the absorbent 50 is diffused in the state in which the saline is injected into the absorber 50 . (60).

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

The absorber 50 may measure the absorption or diffusion state of salt water in a state positioned in the container part 30 below. This will be described in detail below.

The body 10 refers to a rheometer for measuring the viscosity or rheological properties of a specimen, and is installed on the floor of the installation site, and the absorber 50 is accommodated inside the absorber 50 to measure the absorption and diffusion state. can be done A measurement space 11 for measuring absorption and diffusion states in a state in which the absorber 50 is accommodated may be formed in the body 10 . In the measurement space 11 , a lifting bar 20 , which is operated to rise or fall, may be installed.

The lifting bar 20 may be installed so as to be raised or lowered in the measurement space 11 by a driving unit (not shown) installed on the main body 10 . The container part 30 in which the absorber 50 is accommodated may be installed in the lower part of the lifting bar 20 .

The container part 30 may be installed inside the main body 10 in a state in which an accommodating space 31 in which the absorber 50 is accommodated is formed therein with the upper part opened. An operation unit 40 that is lifted by the lifting bar 20 in a state in which the absorber 50 is accommodated may be installed inside the container unit 30 to be able to rise or fall.

The operation unit 40 is connected to the lifting bar 20 and a lifting plate 43 for selectively pressing the absorber 50 by being raised or lowered in the receiving space 31 is installed at a lower portion thereof, and the absorber 50 ) An injection unit 42 for injecting salt water in the direction may be formed.

More specifically, the operation unit 40, one side is connected to the end of the lifting bar 20, the injection body 41 formed with the injection unit 42, the other side of the injection body 41 is connected to the bottom The silver absorber 50 may include a lifting plate 43 in contact.

One side of the injection body 41 is fixed to the end of the lifting bar 20 , and may be integrally or detachably fixed in a cylindrical shape. Of course, the injection body 41 is not necessarily limited to a cylindrical shape, and it is also possible to change and apply an appropriate shape such as a polygon.

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

The injection unit 42 is protruded from the lower portion of the injection body 41 , and a discharge flow path may be formed therein to discharge the salt water 44 . An injection hole 41a may be formed in a side surface of the injection body 41 so that salt water is discharged through the injection unit 42 . Accordingly, salt water may be injected through the injection hole 41a and discharged from the injection unit 42 toward the absorber 50 .

The lifting plate 43 may be installed in the injection body 41 .

The lifting plate 43 is installed under the injection body 41 and may be formed in a size corresponding to the area of the plane of the receiving space 31 of the container unit 30 . As described above, the reason that the lifting plate 43 is installed under the injection body 41 is to selectively press the absorber 50 in conjunction with the lifting or lowering operation of the lifting bar 20 . Here, the pressing force of the lifting plate 43 is possible to press up to 17 psi.

The lifting plate 43 may be rotatably installed at a constant angular speed on the injection body 41 .

Pressing the absorbent body 50 using the lifting plate 43 is to properly implement a state in which the user sits or lies while wearing a diaper.

As such, the state in which the brine 44 is injected into the container unit 30 through the operation unit 40 and absorbed by the absorber 50 may be measured by the control unit 60 .

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

As such, the control unit 60 measures the height difference or diffusion distance at which the saline is absorbed in the superabsorbent polymer resin 50a and the SAP-Fluff composite 50b of the superabsorbent polymer resin 50a used in the diaper. This is to check whether a normal state with excellent feeling of use is present. This will be described in detail below.

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

Here, the control unit 60 may measure the change in the height of the brine absorbed into the superabsorbent polymer resin 50a using a rheometer of the body.

That is, the rheometer automatically measures the first height value using the height difference in which the height of the elevating plate 43 is increased compared to before the swelling of the absorber 50 based on the swelling of the saline water absorbent 50 . can do.

Next, the control unit 60 measures a second height value at which the salt water is absorbed into the SAP-Fluff composite 50b. Here, as described above, the second height value may be automatically measured using a rheometer.

In this way, the control unit 60 checks the measured values of the first height value and the second height value in which the brine is absorbed in each of the superabsorbent polymer resin 50a and the SAP-Fluff composite 50b, and the first height value and a difference value between the second height value may be derived.

That is, the controller 60 may determine whether the difference between the first height value and the second height value is less than the first set distance. As such, when the difference between the first height value and the second height value is less than the first set distance, the control unit may check the diffusion distance through which the salt water is absorbed and diffused into the SAP-Fluff complex 50b. Of course, the controller 60 may appropriately change the order of checking the diffusion distance and the difference between 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 control unit 60 can confirm that the first condition for confirming the normal state of the superabsorbent polymer resin 50a is satisfied.

Next, the control unit 60 receives the sensing signal of the diffusion distance where the salt water is absorbed and diffused by the SAP-Fluff complex 50b from the diffusion measuring unit 70, and whether the diffusion distance is less than a second preset distance can be checked

Here, the diffusion measuring unit 70 measures the state in which the salt water 44 is diffused into the SAP-Fluff complex 50b, and the state in which the salt water 44 is diffused inside the SAP-Fluff complex 50b is photographed. It may include a camera that Hereinafter, the diffusion measuring unit and the camera use the same reference numerals.

In this way, it is possible to derive the diffusion distance through image analysis by taking an image in which the salt water 44 is diffused inside the SAP-Fluff complex 50b using the camera 70 .

Here, the control unit 60 may receive the diffusion distance signal sensed through the camera 70 to determine whether the diffusion distance is less than the second set distance of 3.9 cm.

Here, to measure the diffusion distance through which the brine is diffused using the camera 70, the size of the SAP-Fluff complex 50b is 100 * 20 mm in width and length, and the diffusion distance of the brine in a state in which the brine is added at 1.4 g. It will be described as an example to measure.

In this way, the control unit 60, as described above, the difference between the first height value and the second height value in which the brine is absorbed is less than the first set distance of 0.7 mm, and the brine 44 is in the SAP-Fluff complex. When the absorbed and diffused distance is less than the second set distance of 3.9 cm, the normal state of the super absorbent polymer (SAP, Super Absorbent Polymer) can be confirmed.

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

Accordingly, it is possible to easily select the normal state of the superabsorbent polymer resin 50a used in the diaper, and thus, it is possible to develop a diaper with excellent usability.

Absorption height difference (mm) Diffusion distance (cm) Rewet amount (g) Rewet standard 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

The table above shows that the size of the SAP-Fluff composite is an area of 100 * 20 mm in width and length, and the difference in absorption height between the superabsorbent polymer resin (50a) and the SAP-Fluff composite (50b) in a state in which brine is added at 1.4 g, It refers to a table comparing the diffusion distance through which salt water is diffused in the SAP-Fluff complex (50b).

As described in the table above, in the comparison of the physical properties of A to E, D and E can be identified under conditions that satisfy the conditions of an absorption height difference of less than 0.7 mm and a diffusion distance of less than 3.9 cm.

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

As shown in FIG. 5 , an excellent product group (C) that satisfies the conditions of an absorption height difference of less than 0.7 mm and a diffusion distance of less than 3.9 cm can be confirmed.

Although preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and variations are possible within the scope of the claims, the detailed description of the invention, and the accompanying drawings, and this also It is natural to fall within the scope of

10...Main body 11...Measuring space
20...Elevating bar 30...Courage part
31...accommodating space 40...actuator
41...injection body 41a...injection hole
42...Injection 43...Elevating plate
50...absorbent 50a..super-absorbent polymer resin
50b.. SAP-Fluff complex 60...control
70...diffusion measuring unit

Claims (7)

a body installed with a lifting bar that is raised or lowered;
a container part installed in the lower part of the lifting bar in the main body and having an accommodating space therein for accommodating an absorbent body;
an operation unit connected to the lifting bar and provided with an ascending plate connected to the lower portion that rises or descends in the interior of the accommodation space to press the absorber, and an injection portion for injecting salt water in the direction of the absorber;
a diffusion measuring unit for measuring a state in which the salt water is diffused into the absorber; and
a control unit installed in the main body to measure a state in which the brine is absorbed by the absorber, and to measure a state in which the brine is diffused in the absorber in a state in which the saline is injected into the absorber;
Including, wherein the absorber is a super absorbent polymer resin (SAP, Super Absorbent Polymer) and a SAP-Fluff composite,
The control unit measures a first height value at which the brine is absorbed into the superabsorbent polymer resin, and measures a second height value at which the brine is absorbed into the SAP-Fluff complex, the first height value and the second height value 2 The difference between the height values is less than the first set distance,
If the diffusion distance of the SAP-Fluff composite measured by the diffusion measuring unit is less than the second set distance, it is confirmed that the superabsorbent polymer resin is in a normal state,
The first set distance is 0.7mm, SAP sorting device. According to claim 1,
The second set distance,
The SAP-Fluff complex has an area of 100 mm in width and 20 mm in length, and the brine is 3.9 cm in 1.4 g conditions. According to claim 1,
The container portion, the upper opening is formed so that the operation portion rises or falls into the interior of the accommodation space, the SAP sorting device made of a transparent material. According to claim 1,
The operation unit,
an injection body having one side connected to an end of the lifting bar and formed with the injection unit; and
a lifting plate connected to the other side of the injection body and having a bottom surface in contact with the absorber;
SAP sorting device comprising a. 5. The method of claim 4,
The injection body, the injection hole for injecting the brine is formed on the side of the SAP sorting device that communicates with the injection hole in the lower portion, the injection portion for discharging the brine protrudes. 6. The method of claim 5,
The lifting plate is connected to the side of the injection body, the injection unit is connected in a penetrating state, and the bottom surface is in contact with the absorber SAP sorting device. According to claim 1,
The diffusion measuring unit, SAP sorting apparatus including a camera for photographing the state in which the saline is diffused inside the absorber.

Images