KR102264659B1 - Apparatus and Method for Molding Micro-plastic samples - Google Patents

Abstract

The present invention relates to a specimen forming apparatus and a forming method for microplastic analysis, and more particularly, comprising: a shape forming part (100) having a predetermined radius of curvature and having an open upper portion and open side portions on both sides; a cover part (200) provided near an edge of one side of the open upper portion of the shape forming part (100); and a tightening part (300) detachably attached to the cover part (200) at one side, and coupled to be detachably attached to the shape forming part (100) at the other side so as to change the radius of curvature of the shape forming part (100).

Description

Apparatus and Method for Molding Micro-plastic samples

The present invention relates to a specimen forming apparatus and a forming method for microplastic analysis, and specifically, to a microplastic including a shape forming part, a cover part and a tightening part that can be molded into a predetermined shape after accommodating a fiber bundle and a cooling solution. It relates to a specimen molding apparatus and molding method for plastic analysis.

Microplastics can be defined as synthetic high molecular compounds with a size of 5 mm or less that can threaten the ecosystem by intentionally manufactured or specific products being crushed or pulverized.

These microplastics can be divided into primary microplastics and secondary microplastics according to the origin of their production, and primary microplastics are intentionally manufactured plastic pellets as resin pellets. plastic raw materials with a size of 2-5 mm), scrubs in face wash and toothpaste (called microbeads), and industrial abrasives. Secondary microplastics refer to plastic fragments that are fragmented and micronized by artificial actions or natural weathering after plastic products are used or discarded.

In the case of primary microplastics, the size is too small to be removed by traditional sewage treatment methods, thereby contaminating marine ecosystems or damaging marine organisms. It is gradually decomposed into small pieces by various natural phenomena such as wind.

In addition, the risk to the ecosystem caused by microplastics is that small plastic fragments cause necrosis of cells by inducing an inflammatory response and abrasions of the organism's internal tissues through physical stimulation, and the hydrophobicity that exists in the environment because plastics have hydrophobic properties. The adsorption of these persistent organic pollutants (POPs), the leakage of chemicals such as various plasticizers, flame retardants, heat/UV stabilizers, and antioxidants added during the plastic manufacturing process, and the potential of microplastics themselves due to their small size Toxicity is predicted.

On the other hand, techniques for analyzing microplastics contained in various water systems include observation by electron microscopy, Raman spectroscopy, differential scanning calorimeter (DSC), thermogravimetric analysis (TGA), and pyrolysis gas chromatography. (pyrolysis-gas chromatography, Pys-GC/MS), etc. are known.

In this case, the specimen used as a control is a fiber strand made of polyethylene (PE), polyamide (PA), polypropylene (PP), polyvinylchloride (PVC), polystyrene (PS) or polyethylene terephthalate (PET) having the same or similar properties as microplastics. It can be obtained by freezing and fixing it and then cutting it to a size of several tens of micrometers, but a device for molding a specimen to be used for microplastic analysis has not been developed.

Korean Patent Publication No. 2020-0027674 Korean Patent Publication No. 2020-0106652 Korean Registration Publication No. 2135690 Korean Patent Publication No. 2020-0097087

The present invention has been devised to solve the above problems, and an object of the present invention is to provide an apparatus for forming a specimen for analysis of microplastics that can be obtained in a predetermined shape by impregnating fiber strands with a solution for freezing.

Another object of the present invention is to provide a method of impregnating fiber strands with a solution for freezing and molding a specimen for analysis of microplastics that can be obtained in a predetermined shape.

A specimen forming apparatus for microplastic analysis according to the present invention for solving the above problems includes: a shape forming unit 100 having a predetermined radius of curvature and having an upper portion and an open side portion; a cover part 200 provided near an edge of one side of the upper opening part of the shape forming part 100; And one side is detachably attached to the cover part 200, and the other side is coupled to be detachably attached to the shape forming part 100, and a tightening part 300 capable of changing the radius of curvature of the shape forming part 100 is included. characterized in that

In addition, in the specimen forming apparatus for microplastic analysis according to the present invention, the shape forming part 100 is a body part 110 made of a plate to have a predetermined radius of curvature, and the body part 110 is located at both edges. The first partition wall 120, the second partition wall 130 positioned to be spaced apart from the first partition wall 120 by a predetermined distance, and the tightening part 300 are provided on the outer surface of the body part 110 so as to be fastened. It is characterized in that it comprises one or more first rings (140).

In addition, in the specimen forming apparatus for microplastic analysis according to the present invention, the second partition wall 130 includes a plurality of second partition wall unit units 131 , and the second partition wall unit unit 131 includes a body part ( The body portion 110 is characterized in that the second insertion hole 112 is provided so as to be fixed to the 110).

In addition, in the specimen forming apparatus for microplastic analysis according to the present invention, the tightening part 300 includes a handle 310 and a tightening band 320 connected to the handle 310, the tightening band 320 . It is characterized in that a plurality of fastening holes 321 are formed at predetermined intervals.

In addition, in the apparatus for forming a specimen for analysis of microplastics according to the present invention, the tightening part 300 is characterized in that it is made of an elastic body that can be stretched in length.

In addition, in the specimen forming apparatus for microplastic analysis according to the present invention, the shape forming part 100 is characterized in that it is made of a metal material.

In addition, in the specimen forming apparatus for microplastic analysis according to the present invention, the first partition wall 120 and the second partition wall 130 of the shape forming part 100 made of a metal or plastic material are each a plurality of first partition wall units. It consists of a unit 121 and a second bulkhead unit unit 131 , and the body part ( ) so that the first bulkhead unit unit 121 and the second bulkhead unit unit 131 can be fixed to the body part 110 . 110) is provided with a first insertion hole 111 and a second insertion hole 112, one or more discharge holes 113 are formed between the first partition wall 120 and the second partition wall 130, The tightening part 300 is connected to a handle 310 having a protrusion 311 for preventing slipping, and the handle 310, and a plurality of fastening holes 321 are formed at predetermined intervals and are elastic so as to be stretchable in length. It is characterized in that it comprises a tightening band 320 made of.

In addition, the method of molding a specimen using the specimen molding apparatus for microplastic analysis according to the present invention is polyethylene (PE), polyamide (PA), polypropylene (PP), polyvinylchloride (PVC), polystyrene (PS), and polyethylene A first step of preparing a fiber bundle 500 by cutting a plurality of fiber strands 510 made of any one material of terephthalate (PET) to a predetermined length, and fixing the vicinity of both edges with a fastening band 520; a second step of injecting the fiber bundle 500 and the cooling solution 600 into the body 110 to impregnate the surface and the inside of the fiber bundle 500 with the cooling solution 600; After pulling the plurality of tightening parts 300 having one side connected to the second ring 210 of the cover part 200 and fastening them to the plurality of first rings 140 of the body part 110, respectively, a predetermined A third step of leaving time; and a fourth step of freezing the fiber bundle 500 and the cooling solution 600 in a received state.

In addition, in the method for forming a specimen according to the present invention, when the fastening part 300 and the first ring 140 of the third step are fastened, the fastening part 300 located in the center of the cover part 200 is first It is characterized in that it is fastened to the ring 140 first.

According to the specimen molding apparatus and the molding method for microplastic analysis according to the present invention, after injecting the fiber bundle and the cooling solution into the shape molding part, it is pressed with the cover part and the tightening part, so it is better to prepare a molded specimen of a desired shape The advantage is that it is possible.

In addition, according to the specimen forming apparatus and forming method for microplastic analysis according to the present invention, since a plurality of opening holes are formed by the pair of first and second barrier ribs, the surplus cooling solution is recovered along with air discharge. This has the advantage that the quality of the specimen is excellent and the manufacturing cost can be reduced.

1 is a perspective view showing an unfolded state of a specimen forming apparatus according to a preferred embodiment of the present invention.
2 is a perspective view showing a wound state of a specimen forming apparatus according to a preferred embodiment of the present invention.
3 is an enlarged view for explaining the coupling structure of the first partition wall and the second partition wall in the specimen forming apparatus according to the preferred embodiment of the present invention.
4 is an enlarged view of a tightening unit mounted on a specimen forming apparatus according to a preferred embodiment of the present invention.
5 is an enlarged view of a fiber bundle according to a preferred embodiment of the present invention.
6 is a perspective view illustrating a method of using a specimen forming apparatus according to a preferred embodiment of the present invention.
7 is a cross-sectional view of a state in which a fiber bundle is mounted in a specimen forming apparatus according to a preferred embodiment of the present invention.

In the present application, terms such as “comprises”, “have” or “have” are intended to designate the existence of features, numbers, steps, components, parts, or combinations thereof described in the specification, and one or more other It is to be understood that this does not preclude the possibility of the presence or addition of features or numbers, steps, operations, components, parts, or combinations thereof.

When a component is referred to as being “connected” or “connected” to another component, it is understood that the other component may be directly connected or connected to the other component, but other components may exist in between. it should be On the other hand, when it is said that a certain element is "directly connected" or "directly connected" to another element, it should be understood that no other element is present in the middle. Other expressions describing the relationship between elements, such as "between" and "immediately between" or "neighboring to" and "directly adjacent to", should be interpreted similarly.

Hereinafter, a specimen forming apparatus and a forming method for microplastic analysis according to the present invention will be described with reference to the accompanying drawings. The same reference numerals are used for the same components in the drawings, and repeated descriptions of the same components are omitted.

1 is a perspective view showing an unfolded state of a specimen forming apparatus according to a preferred embodiment of the present invention, and FIG. 2 is a perspective view showing a wound state of the specimen forming apparatus according to a preferred embodiment of the present invention.

Referring to FIGS. 1 and 2 , the specimen forming apparatus according to the present invention is configured to include a shape forming part 100 , a cover part 200 , a tightening part 300 , and a support part 400 .

First, the shape forming part 100 will be described in detail. The body part 110 and the first partition wall 120 are for molding to have a substantially cylindrical external shape in a state in which the cooling solvent is evenly impregnated in the fiber bundle to be described later. ), a second partition wall 130 , and a first ring 140 .

The body portion 110 has both side portions and an upper portion open, and has a shape extending long in the horizontal direction while having a predetermined radius of curvature.

Here, the body 110 may be made of a metal or plastic having a predetermined thickness, preferably a metal plate, so that the radius of curvature can be changed by an external force.

That is, the upper part is usually open as shown in FIG. 1 , and when the cover part 200 is pulled, the radius of curvature is reduced so that the upper part is closed as shown in FIG. 2 and can be changed to a cylindrical shape.

In addition, a first insertion hole 111 and a second insertion hole 112 are formed along an imaginary extension line on which the first partition wall 120 and the second partition wall 130 are positioned, which will be described later.

On the other hand, it is preferable that one or more discharge holes 113 are provided between the first partition wall 120 and the second partition wall 130 . These discharge holes 113 are for recovering the surplus cooling solvent, although Although not shown in the drawings, it is obvious that a mage (not shown) for opening and closing the discharge hole 113 may be additionally provided.

Subsequently, a pair of first partition walls 120 are positioned at both edges of the body part 110 , and the second partition walls 130 are spaced apart from the first partition walls 120 by a predetermined distance in the inner direction of the body part 110 . Located. And when the body part 110 is rolled up using the cover part 200 , the first opening hole S1 is formed by the first partition wall 120 as shown in FIG. 2 , while the second partition wall 130 is A second opening hole S2 is provided.

When the fiber bundle is uniformly impregnated with the cooling solvent and press-molded into a cylindrical shape, these first opening holes (S1) and second opening holes (S2) not only act as passages through which air or excess cooling solvent moves, but also , it is possible to prevent deformation due to increase in the volume of the cooling solvent during freezing. Of course, the second partition wall 130 can be used as a seating die because both edges of the fiber bundle, which will be described later, are placed.

In particular, a predetermined space is formed between the first partition wall 120 and the second partition wall 130 , and it may be used as a place where the above-described surplus cooling solvent is collected.

The first ring 140 is provided in plurality along the outer surface of the body portion 110, more specifically in the longitudinal direction, which is for fixing the tightening portion 300 . Although the figure shows that the first ring 140 is three, it is more preferable that five or more are provided only as an example.

3 is an enlarged view for explaining the coupling structure of the first partition wall and the second partition wall in the specimen forming apparatus according to the preferred embodiment of the present invention.

The first partition wall 120 and the second partition wall 130 may be formed integrally with the body part 110 in the shape of one long band having a predetermined height and length, but in this case, the body part 110 is rolled up. In this case, there is a possibility that the end edges of the first partition wall 120 and the second partition wall 130 are slightly curved.

Accordingly, it is preferable that the first partition wall 120 includes a plurality of first partition wall unit units 121 , and the second partition wall 130 includes a plurality of second partition wall unit units 131 , and the first partition wall unit unit Each of the 121 is more preferably disposed to be positioned while moving little by little inward relative to the edge of the body portion (110). Of course, it is preferable that the second bulkhead unit units 131 also be sequentially disposed after moving little by little inward or outward based on the edge of the body part 110 while being spaced apart from the first bulkhead unit units 121 by a predetermined distance. .

On the other hand, these first bulkhead unit unit 121 and second bulkhead unit unit 131 are fixed to the first insertion hole 111 and the second insertion hole 112 of the body part 110 by a press-fitting method, respectively. can be separated.

The cover part 200 will be described with reference to FIGS. 1 and 2 again. The cover part 200 is provided near the edge of one side of the upper opening of the shape forming part 100, and after injecting the fiber bundle and the cooling solvent into the shape forming part 100, it is for pressing so as to have a cylindrical shape. . The cover part 200 may be made of the same material as the shape forming part 100 , but it may be made of a more flexible material, for example, rubber having a predetermined thickness so as to easily roll the shape forming part 100 in a round shape. more preferably.

On the other hand, a plurality of second rings 210 that can be fastened to one side of the tightening part 300 are provided on the outer surface of the cover part 200 .

4 is an enlarged view of a tightening unit mounted on a specimen forming apparatus according to a preferred embodiment of the present invention. Referring to FIG. 4 , the tightening unit 300 is described, the tightening unit 300 is configured to include a handle 310 and a tightening band 320 .

In more detail, the tightening band 320 is provided with a plurality of fastening holes 321 at predetermined intervals, and any one of the fastening holes 321 is the second ring 210 of the cover unit 200 described above. is fastened to, and any one of the other fastening holes 321 is fastened to the first ring 140 of the body part 110 .

In addition, one or more transverse projections 311 are formed on the handle 310 so as not to slip when the tightening part 300 is pulled by hand.

The tightening part 300 having the above configuration is made of an elastic material that can expand and contract in length, such as rubber, so that a predetermined pressure can be continuously applied in a state in which the shape forming part 100 is rolled up in a state similar to the cover part 200 . good to be done

Referring back to FIGS. 1 and 2 , the support unit 400 is configured to support the shape forming unit 100 , and specifically, a fiber bundle and a cooling solvent are injected into the shape forming unit 100 , and the cover unit 200 . This is to prevent contact with foreign substances in a series of work processes in which the shape forming part 100 is rolled up and fixed for a predetermined time by using the and tightening part 300, while making the work convenient.

This support 400 is a pair of cradles 410 made of a semi-elliptical shape with an open top so as to support both sides of the shape forming part 100, and the cradle 410 from the working die by a predetermined distance. It is configured to include a connecting shaft 430 for connecting and fixing the support 420 and the pair of cradles 410 to each other.

The holder 410, the support 420, and the connecting shaft 430 are not particularly limited as long as they have sufficient strength and durability, and may be, for example, a metal wire.

5 is an enlarged view of a fiber bundle according to a preferred embodiment of the present invention. As described above, the specimen for microplastic analysis is a fiber strand having a predetermined diameter, for example, polyethylene (PE), polyamide (PA), polypropylene (PP), polyvinylchloride (PVC), polystyrene (PS), polyethylene terephthalate (PET) is prepared by cutting a fiber strand to a predetermined length, and the fiber bundle accommodated in the shape forming unit 100 has a plurality of fiber strands 510 overlapped in the same direction, and these fiber strands 510 are overlapped in the same direction. Near both ends, it is fixed by a pair of fastening bands 520 to form one bundle.

Next, a method for forming a specimen using a specimen forming apparatus for analyzing microplastics having the above-described configuration will be described. 6 is a perspective view for explaining a method of using a specimen forming apparatus according to a preferred embodiment of the present invention, and FIG. 7 is a cross-sectional view of a state in which a fiber bundle is mounted in the specimen forming apparatus according to a preferred embodiment of the present invention.

Referring to FIGS. 6 and 7, when describing the specimen molding method for microplastic analysis according to the present invention, polyethylene (PE), polyamide (PA), polypropylene (PP), polyvinylchloride (PVC), polystyrene (PS) and A first step of preparing a fiber bundle 500 by cutting a plurality of fiber strands 510 made of any one of polyethylene terephthalate (PET) to a predetermined length, and fixing the vicinity of both edges with a fastening band 520, the body The second step of impregnating the fiber bundle 500 and the cooling solution 600 into the part 110 to impregnate the surface and the inside of the fiber bundle 500 with the cooling solution 600, one side of the cover part 200 A third step of pulling the plurality of tightening parts 300 connected to the second ring 210, each fastening to the plurality of first rings 140 of the body 110, and leaving it for a predetermined time, the fiber bundle A fourth step of freezing in a state in which the 500 and the cooling solution 600 are accommodated, and the fiber bundle 500 and the cooling solution 600 are frozen to separate the integrated molded body from the body 110 It consists of 5 steps.

Specifically, in the first step, in consideration of the length of the body 110 and the inner diameter when rolled, the fiber strands 510 made of PET are prepared in a predetermined length and number, and then both sides are fixed with a fastening band 520 . This is a step to prepare the fiber bundle (500).

In the second step of impregnating the fiber bundle 500 and the cooling solution 600 into the body 110 to impregnate the surface and the inside of the fiber bundle 500 with the cooling solution 600, the cooling solution 600 A part of the body part 110, more specifically, after injecting between the pair of first partition walls 120 in advance, accommodates the fiber bundle 500 and then additionally injects the cooling solution 600, After the fiber bundle 500 is accommodated, the cooling solution 600 may be injected, or the cooling solution 600 may be sufficiently injected and then the fiber bundle 500 may be accommodated.

Here, when the fiber bundle 500 is accommodated in the body part 110 , it is preferable to seat the fastening band 520 so that it is positioned between the first partition wall 120 and the second partition wall 130 .

After pulling the plurality of tightening parts 300 having one side connected to the second ring 210 of the cover part 200 and fastening them to the plurality of first rings 140 of the body part 110, respectively, a predetermined time In the third step of leaving the cover part 200, it is preferable to first fasten the fastening part 300 located in the center of the cover part 200 to the first ring 140, and then fasten the nearby fastening parts 300, each It is more preferable to perform the fastening process at predetermined time intervals.

This is for discharging air that may exist between the fiber strands 510 itself or between the fiber strands 510. When the tightening part 300 located in the center of the cover part 200 is first fastened, the fiber bundle 500 is This is because the air located in the center moves to both sides, and then, by fastening the adjacent tightening part 300 , the air can be discharged by sequentially moving to both ends of the fiber bundle 500 .

On the other hand, in the third step, an excess amount of the cooling solution 600 may be generated by the pressure of the body part 110 , and the excess cooling solution 600 is formed by the first partition wall 120 and the second partition wall 130 . It is collected in a predetermined space provided in between, and can be reused by collecting it through the discharge hole 113 .

In the fourth step of freezing the fiber bundle 500 and the cooling solution 600 in the received state, the cooling solution 600 is cooled and the fiber bundle 500 is frozen until the fiber bundle 500 can be fixed.

Here, the cooling solution 600 may be an O.C.T solution (Optical Cutting Temperature Solution).

Next, the fifth step of separating the molded body integrally formed by freezing the fiber bundle 500 and the cooling solution 600 from the body part 110 is a step of separating the body part 110 to form a new specimen. .

The fiber bundle 500 and the cooling solution 600 are frozen and the integrated molded body is cut to a predetermined length using a separate cutting device, and after washing the cooling solution 600, a specimen for microplastic analysis use it as

As described above in detail a specific part of the content of the present invention, to those of ordinary skill in the art, these specific descriptions are only preferred embodiments, and the scope of the present invention is not limited thereby, It is obvious to those skilled in the art that various changes and modifications can be made within the scope and spirit of the present invention, and it is natural that such variations and modifications fall within the scope of the appended claims.

100: shape forming part
110: body part
111: first insertion hole 112: second insertion hole
113: discharge hole
120: first bulkhead 121: first bulkhead unit unit
130: second bulkhead 131: second bulkhead unit unit
140: first ring
200: cover part
210: second ring
300: tightening part
310: handle 311: protrusion
320: fastening band 321: fastening hole
400: support
410: cradle 420: support
430: connecting shaft
500: fiber bundle
510: fiber strand
520: fastening band
600: cooling solution
S1: first opening hole
S2: second opening hole

Claims (9)

a shape forming part 100 having a predetermined radius of curvature and having an upper portion and an open side portion;
a cover part 200 provided near an edge of one side of the upper opening part of the shape forming part 100; and
One side is detachably attached to the cover part 200, and the other side is coupled to be detachably attached to the shape forming part 100, and includes a tightening part 300 capable of changing the radius of curvature of the shape forming part 100,
The shape forming part 100 includes a body part 110 made of a plate to have a predetermined radius of curvature, a first partition wall 120 positioned at both edges of the body part 110, the first partition wall 120 and A second partition wall 130 positioned to be spaced apart by a predetermined distance, and one or more first rings 140 provided on the outer surface of the body part 110 so as to fasten the tightening part 300,
The first partition wall 120 and the second partition wall 130 of the shape forming part 100 made of a metal or plastic material include a plurality of first partition wall unit units 121 and second partition wall unit units 131, respectively. and a first insertion hole 111 and a second insertion hole in the body part 110 so that the first partition wall unit unit 121 and the second partition wall unit unit 131 can be fixed to the body part 110 . 112 is provided, and at least one discharge hole 113 is formed between the first partition wall 120 and the second partition wall 130,
The tightening part 300 is connected to the handle 310 having a protrusion 311 for preventing slipping, and the handle 310, and a plurality of fastening holes 321 are formed at predetermined intervals and are elastic so that the length can be extended Specimen forming apparatus for microplastic analysis, characterized in that it comprises a tightening band 320 made of.
delete delete delete delete delete delete A method of forming a specimen using the specimen forming apparatus for microplastic analysis according to claim 1,
A plurality of fiber strands 510 made of any one of polyethylene (PE), polyamide (PA), polypropylene (PP), polyvinylchloride (PVC), polystyrene (PS), and polyethylene terephthalate (PET) are cut to a predetermined length. and a first step of preparing a fiber bundle 500 in which the vicinity of both edges is fixed with a fastening band 520;
a second step of injecting the fiber bundle 500 and the cooling solution 600 into the body 110 to impregnate the surface and the inside of the fiber bundle 500 with the cooling solution 600;
After pulling the plurality of tightening parts 300 having one side connected to the second ring 210 of the cover part 200 and fastening them to the plurality of first rings 140 of the body part 110, respectively, a predetermined A third step of leaving time; and
A method for forming a specimen for microplastic analysis, characterized in that it comprises a fourth step of freezing the fiber bundle 500 and the cooling solution 600 in a received state.
9. The method of claim 8,
When the fastening part 300 and the first ring 140 of the third step are fastened, the fastening part 300 located in the center of the cover part 200 is first fastened to the first ring 140 . Specimen molding method for microplastic analysis.

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