KR102428808B1 - A method for manufacturing recycled resin using waste resin - Google Patents

Abstract

The present invention relates to a method for producing a recycled resin using waste resin. More specifically, recycled resin having a certain size in the form of pellets can be produced using discarded waste resin. The method of the present invention includes: a supply step (S1) in which pulverized waste resin is supplied through a feeder; a melting step (S2) in which the supplied waste resin is melted in a heating furnace; an intermediate material production step (S3) in which the molten waste resin is made to pass through a sieve and then discharged in the form of dough; a cooling step (S4) in which the intermediate material is processed and cooled into a tong shape; and a subdivision step (S5) in which the processed intermediate material is cut into a predetermined size.

Description

Recycled resin manufacturing method using waste resin {A METHOD FOR MANUFACTURING RECYCLED RESIN USING WASTE RESIN}

The present invention relates to a method for manufacturing a recycled resin using a waste resin, and more particularly, to a method for manufacturing a recycled resin using a waste resin capable of producing a recycled resin having a predetermined size in the form of pellets using the discarded waste resin.

Resin is a generic term for natural and synthetic resins. These resins are used in various fields such as films, sheets, and pipes.

As described above, as the resin is used in various fields, the amount of discarded resin is increasing.

When these resins are incinerated for disposal, harmful substances are emitted and there is a problem that it takes a long time for landfilling, so technologies for processing the discarded resin are required along with the increased amount of resin used.

On the other hand, the prior art Patent Publication No. 10-2015-0090620 (hereinafter referred to as the prior art) relates to a superabsorbent polymer cutting device and a method for manufacturing a superabsorbent polymer using the same, and more particularly, the superabsorbent polymer cutting device is a superabsorbent polymer By including an input part into which is inputted, a first cutter for primary cutting of the superabsorbent polymer, a second cutter for secondary cutting of the superabsorbent polymer, and a discharge part through which the cut superabsorbent polymer is discharged, It is effective to provide an excellent superabsorbent polymer by reducing the load and reducing the breakage of the cross-linked polymerization ring due to over-pulverization.

However, this prior art has a problem in that it is impossible to manufacture a recycled resin using the discarded waste resin.

In addition, this prior art had a problem in that it was impossible to manufacture a recycled resin having excellent quality by using the waste resin.

The present invention has been devised to solve the above problems, and an object of the present invention is to provide a method for manufacturing a recycled resin using a waste resin capable of producing a recycled resin using the discarded waste resin.

Another object of the present invention is to provide a method for manufacturing a recycled resin using a waste resin capable of producing a recycled resin having excellent quality by using the waste resin.

The present invention for the purpose of solving the above problems has the following configuration and features.

a supply step (S1) in which the pulverized waste resin is supplied through a feeder; a melting step (S2) in which the supplied waste resin is melted in a heating furnace; An intermediate material manufacturing step of discharging the molten waste resin in the form of a dough after passing it through a sieve (S3); a cooling step (S4) of processing and cooling the intermediate material into a melodic shape; and a subdivision step (S5) of cutting the processed intermediate material to a predetermined size.

In addition, the cooling step (S4) includes a first cooling step (S41) of immersing the processed intermediate material in cooling water, and a second cooling step (S42) of freeze-cooling the primary cooled intermediate material, wherein the second cooling In step S42, the bottom surface of the first cooling rod disposed on the intermediate member, the support disposed at the rear end of the first cooling rod, the support disposed under the intermediate member, the support disposed at the rear end of the support member and disposed on the upper part of the intermediate member It may be configured to sequentially pass through the bottom surface of the second cooling rod.

In addition, in the cooling step (S4), the intermediate material is processed into a plurality of rhythms by a processing machine having a plurality of molding holes, and the support may include a plurality of seating slits in which each melody is seated and supported.

The present invention having the above configuration and characteristics has the effect that a recycled resin can be manufactured using the waste resin that is discarded.

In addition, the present invention has the effect of being able to manufacture a regenerated resin having excellent quality by using the waste resin.

1 is a schematic flowchart of a method for manufacturing a regenerated resin according to an embodiment of the present invention.
2 is a view for explaining a waste resin.
3 is a view for explaining the feeder and the heating furnace.
4 is a view for explaining the extruder.
5 is a view for explaining the intermediate material discharged from the extruder.
6 is a view for explaining a melodic intermediate material discharged from the processing machine.
7 is a view for explaining a freeze-cooling device.
8 is a view for explaining the cutter and the pellet.
9 is a view for explaining a further embodiment of the present invention.

Since the present invention can have various changes and can have various forms, implementation examples (態樣, aspects) (or embodiments) will be described in detail in the text. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

The terminology used herein is only used to describe a specific embodiment (aspect, aspect, aspect) (or embodiment), and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as comprises or consists of are intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist, but one or more other features It is to be understood that it does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

~1~, ~2~, etc. described in the present specification will only be referred to to distinguish that they are different components, and are not limited to the order of manufacture, and the names are not in the detailed description and claims of the invention. may not match.

Throughout this specification, when a part is "connected" with another part, this includes not only the case of being "directly connected", but also the case of being "indirectly connected" with another element interposed therebetween. do.

1 is a schematic flowchart of a method for manufacturing a recycled resin according to an embodiment of the present invention. 2 is a view for explaining a waste resin. 3 is a view for explaining a feeder and a heating furnace.

The method for manufacturing a regenerated resin according to an embodiment of the present invention (a method for manufacturing a regenerated resin using a waste resin) is for manufacturing a reusable reusable resin (P) using the discarded waste resin (W). For convenience, it will be referred to as 'this method'.

1 to 3 , the method includes a feeding step (S1), a melting step (S2), an intermediate material manufacturing step (S3), a cooling step (S4), and a subdivision step (S5).

The supply step (S1) is a step in which the pulverized waste resin W is supplied through the feeder 1 . The feeder 1 may be a conveyor, and the waste resin W is seated at the front end of the belt of the conveyor and moves to the rear end through the waste resin W by the conveyor (feeder 1).

Here, the front end and the rear end are based on the movement direction of the waste resin (W), the intermediate material (I) to be described later, and the regenerated resin (P) (pellets) described later in this method, and the waste resin (W), the intermediate material to be described later (I), the regenerated resin (pellets (P)) to be described later can move from the front end to the rear end.

In the above-described conveyor, the rear end side is disposed above the front end side, and the rear end side may be disposed above the inlet portion of the heating furnace 2 to be described later.

Here, the upper side (top, etc.) means the upper side (top, etc.) with reference to FIGS. 4 and 5, and the lower side (lower side, etc.) means the lower side (lower side, etc.) with reference to FIGS. 4 and 5, but below The same shall be applied in the description of

In the conveyor, a plurality of protrusions protruding from the belt in the normal direction of the belt may be arranged at intervals along the longitudinal direction of the belt, and through this, the waste resin W moves to the rear end along the belt and is a heating furnace to be described later. (2) It can move to the side.

1 and 3 , the melting step S2 is a step in which the supplied waste resin W is melted in the heating furnace 2 . The heating furnace 2 may be an electric furnace or the like, and heats the waste resin W above the melting temperature of the waste resin W to melt it.

The heating furnace 2 may have an exemplary upper side opening to form an inlet, and the waste resin W falling from the rear end of the above-described feeder 1 may pass through the inlet to the inner space of the heating furnace 2 . can be imported. The heating furnace 2 melts the waste resin W by heating the waste resin W to a melting temperature or higher.

4 is a view for explaining the extruder. 5 is a view for explaining the intermediate material discharged from the extruder.

1, 4 and 5, the intermediate material manufacturing step (S3) is a step of discharging the melted waste resin (W) in the form of dough after passing through a sieve.

The heating furnace 2 may include, for example, a discharge part opened to the lower side and an opening/closing part for opening and closing the discharge part. After the melting step (S2), the molten waste resin (W) may be discharged through the discharge unit and move to the extruder 4 for performing the intermediate material manufacturing step (S3).

The extruder 4 may include, for example, a housing and a first screw having a horizontal longitudinal direction inside the housing. That is, as the first screw rotates about the horizontal direction as the central axis, the molten waste resin (W) is moved from the front end to the rear end, and the melted waste resin (W) is kneaded toward the outlet disposed on the rear end of the housing. It can be extruded and discharged in the form. Here, the horizontal direction means a direction parallel to the ground, and may mean a left-right direction with reference to FIG. 4 . The same will be applied in the following description.

Of course, the configuration of the extruder 4 is described as an example, and is not limited thereto, and may include various configurations as long as the molten waste resin W can be discharged in the form of a dough.

A sieve (not shown) is disposed inside the housing and is disposed at the tip of the housing rather than the outlet to filter out foreign substances mixed in the molten waste resin (W).

The waste resin (W) has been used in various industrial fields, and there is a possibility that various foreign substances may be mixed, and this method uses the waste resin (W), including the intermediate material manufacturing step (S3), but filters out foreign substances. There is an advantage in that the regenerated resin (P) having excellent quality can be manufactured.

6 is a view for explaining a melodic intermediate material discharged from the processing machine. 7 is a view for explaining a freeze-cooling device.

1, 6 and 7, the cooling step (S4) is a step of processing and cooling the intermediate material (I) in a melodic shape.

The cooling step (S4) may be performed by the processor 7, the cooling tube 5, the freeze cooling device 6, and the like.

First, the processor 7 may also comprise a corresponding configuration, illustratively such as the extruder 4 described above. That is, it may include a case and a second screw. An inlet through which the intermediate material (I) discharged from the extruder (4) is introduced may be formed at the front end of the case.

In addition, a die 71 having a plurality of forming holes may be disposed at the rear end of the case, and the forming hole may be an outlet of the case of the processing machine 7 . As the second screw operates, the intermediate material (I) in the form of dough may move toward the rear end, and the intermediate material (I) may be processed into a plurality of melodic shapes and discharged through a plurality of forming holes.

That is, the cooling step (S4) may include a processing step (S40) of processing the intermediate material (I) discharged in the intermediate material manufacturing step (S3) into a melodic shape through the processing machine (7) to produce the processed intermediate material (I). can

1, 6 and 7, the cooling step (S4) is a first cooling step (S41) of immersing the processed intermediate material (I) (the intermediate material (I) after the processing step (S40)) in cooling water (S41) may include.

The first cooling step (S41) may be performed by the cooling tube 5, and the cooling tube 5 may be disposed at the rear end of the processing machine 7 and the cooling water may be accommodated therein. The plurality of processed intermediate materials (I) discharged from the processing machine (7) in the first cooling step (S41) may be cooled by being immersed in the cooling water accommodated in the cooling tank (5).

In addition, the cooling step (S4) may include a second cooling step (S42) of freeze-cooling the primary cooled intermediate material (I) (the intermediate material (I) after the first cooling step (S41)).

The second cooling step (S42) may be performed by the freezing cooling device (6). The freezing and cooling device 6 may be disposed at the rear end of the cooling tube 5 .

The second cooling step (S42) will be described in more detail, the second cooling step (S42) is the bottom surface of the first cooling rod 61 disposed on the upper portion of the intermediate material (I), the first cooling rod (61) The lower surface of the support 62 disposed at the rear end of the intermediate member I, and the second cooling rod 63 disposed at the rear end of the support 62 and disposed on the upper portion of the intermediate member I, are sequentially applied. It can be configured to pass through.

Each of the first cooling rod 61 and the second cooling rod 63 may be connected to an upper portion of a post installed on the ground or the like.

Illustratively, the cooling rods (the first cooling rod 61 and the second cooling rod 63) may be made of a metal material, and heat exchange may be performed by contact with ice, dry ice, or the like.

As described above, in the method, the cooling step (S4) includes the first cooling step (S41) and the second cooling step (S42) to sequentially cool the intermediate material (I) of the melodic shape to cool in the cooling step (S4) There is an advantage that the stability of the intermediate material (I) can be added by minimizing the residual stress of the intermediate material (I) by the

In addition, as described above, the second cooling step (S42) is disposed between the first cooling rod 61 and the second cooling rod 63, and is configured to pass through the support 62 supporting the lower portion of the intermediate member (I). There is an advantage that it is possible to suppress that the intermediate material (I) of the melodic shape in the freeze-cooling device (6) is drooping downward and does not come into contact with the bottom surfaces of the cooling rods.

Referring to FIG. 7 , it may include a plurality of seating slits 621 in which each melody (intermediate material (I) in the form of a melody) of the support 62 is seated and supported. The seating slit 621 may be recessed downward from the support 62 .

A plurality of seating slits 621 may be arranged at intervals along a direction orthogonal to the moving direction of the intermediate member (I) in the freezing and cooling device (6) in a plan view.

Through this, it is possible to keep a plurality of intermediary materials (I) in the form of melodies scattered at intervals along a direction perpendicular to the direction of movement on a plane with respect to the moving direction of the intermediary material (I) in the freezing and cooling device (6) (to suppress agglomeration) ), there is an advantage that can improve the cooling efficiency of the intermediate material (I) for the cooling rods.

8 is a view for explaining the cutter and the pellet.

1 and 8, the subdivision step (S5) is a step of cutting the processed intermediate material (I) to a predetermined size.

The above-described subdivision step (S5) may be performed by the cutter (3). Illustratively, the cutter 3 may be disposed on the rear end side of the freeze-cooling device 6 described above, and is provided with a blade to cut a plurality of intermediate materials (I) in the form of a melodic to have a predetermined size in the form of pellets to form a finished product (regenerated resin (P)) can be prepared.

Illustratively, the cutter 3 may include a housing, a saw blade disposed inside the housing, a motor for rotating the saw blade, and the like, which are described, for example, as long as it can cut the intermediate material I described above. configuration may be included.

In this way, the present method melts the waste resin (W) including the melting step (S2) and the subdivision step (S5) and can manufacture the recycled resin (P) having a predetermined size, so that the waste resin (W) is recycled There are advantages to being able to In addition, as described above, there is an advantage that the waste resin (W) is utilized, including the intermediate material manufacturing step (S3) in which the molten waste resin (W) passes through a sieve, but a recycled resin (P) having excellent quality can be manufactured. .

9 is a view for explaining a further embodiment of the present invention.

7 and 9 , on the other hand, the freezing and cooling device 6 may include a waterproofing material GS and a functional additive G applied to the outer surface of the support 62 .

The waterproofing material GS is applied to the outer surface of the support 62 and may include 5 parts by weight of urethane (compared to 0.2 parts by weight of latex to be described later). The waterproofing material GS includes urethane to add waterproofness to the support 62 .

The functional additive (G) contains 0.2 parts by weight of latex, is fibrous and includes a stretchable sheathing material (G1) dispersedly disposed in the waterproofing material (GS), 0.4 parts by weight of bismuth nickel iron oxide, and has a particle shape, but the stretchable sheathing material Containing 0.2 parts by weight of a mixture of a variable material (G2), magnetite, polyacrylic acid, and polyoxyethylene accommodated in (G1), the stretchable outer material (G1) A cationic material (G3) provided at either end of both side ends, and 0.2 parts by weight of p-styrenesulfonic acid (SSNa), the other of both ends of the stretchable outer material (G1) It includes an anionic polymer material (G4) provided at one end (the ratio of each component of the functional additive (G) was based on 0.2 parts by weight of latex).

Referring to FIG. 9 , the functional additive G will be described in more detail. The stretchable outer material G1 includes latex that is elastically deformable in order to respond to a volume change of the variable material G2 to be described later.

If the latex of the stretchable outer material (G1) is less than 0.2 parts by weight, there is a risk that the variable material (G2) may be lost because the variable material (G2), which will be described later, is not sufficiently wrapped with a sufficient thickness, and when the latex exceeds 0.2 parts by weight, the functionality Since the weight of the additive (G) is excessively increased and the functional additive (G) moves to the lower side of the waterproofing material (GS) in a mixed state with the waterproofing material (GS), there is a problem that the dispersibility is reduced.

Common materials such as waterproofing materials (GS) generally increase in volume as the temperature increases. However, the volume of bismuth nickel iron oxide (BiNi1-xFexO3) included in the variable material G2 and which is an oxide ceramic material decreases as the temperature increases. Bismuth nickel iron oxide was used because it has more than twice the 'negative thermal expansion' effect of conventional materials (eg, zirconium vanadate, etc.) at room temperature.

9 [A] is a view for explaining the functional additive (G) at a first temperature (for example, 10 ℃) of room temperature. [B] of FIG. 9 is a view for explaining the functional additive (G) at a second temperature (eg 20° C.) higher than the first temperature among room temperature.

In FIG. 9 , when the waterproofing material GS increases from the first temperature to the second temperature, the volume increases. In this case, there is a problem in that the waterproofing material GS is bent and wrinkled. There is a problem that the applied waterproofing material GS is separated from the support 62 and peeling may occur.

The above-described functional additive (G) is for suppressing an increase in volume (or horizontal direction (left and right direction based on FIG. 9)) of the waterproofing material (GS) according to the temperature increase, and the variable material (G2) is the above-described As the temperature increases, the volume decreases as the temperature increases.

It is said that the stretchable outer material G1 is a material that is elastically deformed, and the variable material G2 is elastically restored as the volume is reduced as shown in [B] of FIG. 9 and thus the volume is also reduced. In this way, by including the variable material (G2) in the functional additive (G), the waterproof material (GS) suppresses the volume change according to the temperature change to suppress the wrinkling, thus effectively suppressing the occurrence of peeling. There are advantages to being able to

The bismuth nickel iron oxide of the variable material G2 is preferably used in an amount of 0.4 parts by weight, but when less than 0.4 parts by weight of the bismuth nickel iron oxide is used, there is a problem that the volume change of the waterproofing material GS cannot be effectively suppressed. When the nickel iron oxide exceeds 0.4 parts by weight, there is a problem in that the dispersibility of the functional additive (G) is reduced by excessively increasing the weight of the functional additive (G).

The variable material G2 (bismuth nickel iron oxide) is preferably in the form of particles, and a plurality of variable materials G2 in the form of particles may be accommodated in the fibrous stretchable outer sheath G1. As described above, since the bismuth nickel iron oxide of the variable material G2 has a large number of particle shapes, it is possible to change the shape of the fibrous and elastically deformable stretchable outer covering material G1 because it is free to move, and the waterproof material (GS) and the functionality The shape of the functional additive (G) may also be variously changed in response to the shape of the support 62 on which the additive (G) is applied. For example, in FIG. 9 , the functional additive (G) has a '-' shape, but may be bent and changed into various shapes such as a 'a', 'b', and 'S' shape. That is, it is possible to improve the adhesion between the waterproofing material (GS) and the functional additive (G).

In addition, the shell material (G1) of the functional additive (G) is an elastic material, and as described above, it can add toughness to the waterproof material (GS) including the fibrous latex, so that the waterproof material (GS) is torn or damaged It has the advantage of being able to effectively suppress things.

The cationic material G3 is provided at either end (the right end in FIG. x) of both ends of the stretchable outer material G1. As described above, magnetite, polyacrylic acid And polyoxyethylene (polyoxyethylene) was used to add a positive polarity to either side of the functional additive (G).

Magnetite became magnetic when it was subjected to an external magnetic field, but when the external magnetic field is removed, the residual magnetism disappears and there is no side effect due to the residual magnetism. The magnetite may be provided on either end side of the stretchable envelope G1.

Polymethacrylic acid is coated on the surface of the magnetite, and contains a plurality of carboxyl groups to form a coordination bond with the magnetite at multiple bonding points, so coating stability can be improved.

Polyoxyethylene may react with a carboxyl group that does not form a coordination bond with magnetite on the surface of polymethacrylic acid to form a stable bond through an amide bond to impart positive charge properties to the magnetite. The positive surface charge of the cation material G3 may have a surface zeta potential of +30 mV or more.

It is preferable that 0.2 parts by weight of the cationic material (G3) is used. When less than 0.2 parts by weight of the cationic material (G3) is used, the positive charge of the functional additive (G) is not sufficient, and the cationic material (G3) exceeds 0.2 parts by weight. When used, there is a problem of excessively increasing the weight of the functional additive (G).

The anionic polymer material (G4) is provided on the other side of both ends of the stretchable outer material (G1), and may include p-styrenesulfonic acid as described above, in addition to adding a hydrogel pre-polymer may include

The anionic polymer material (G4) may be a mixture of p-styrenesulfonic acid and hydrogel pre-polymer (ratio 1:19) and UV-cured.

It is preferable that 0.2 parts by weight of p-styrenesulfonic acid of the anionic polymer material (G4) is included. When less than 0.2 parts by weight of p-styrenesulfonic acid is used, the negative charge of the functional additive (G) is not sufficient, and p- When the amount of styrenesulfonic acid exceeds 0.2 parts by weight, the weight of the functional additive (G) is excessively increased to reduce dispersibility.

When the waterproofing material (GS) contains a large number of units (GU) of the functional additive (G), the neighboring units (GU) are separated by shear force in a stirring (mixing) situation to improve the dispersibility of each component in the composition. can

As described above, the functional additive (G) is said to contain the anionic polymer material (G4) of the cationic material (G3) at both ends of the stretchable outer material (G1), respectively. After mixing, the waterproofing material (GS) is the support ( 62), the neighboring units (GU) can be attached by electrostatic attraction. Toughness may be imparted by electrostatic attraction between the materials G4 .

At this time, the magnetite of the cationic material (G3) is a mineral that is likely to be damaged by impact, and the anionic polymer material (G4) is a polymer material that is basically easier to deform than a mineral. Therefore, when the neighboring units (GU) are mutually attached by electrostatic attraction, the shape of the anionic polymer material (G4) is changed by the cationic material (G3), thus reducing the impact applied to the cationic material (G3) Therefore, it is possible to effectively suppress the damage of the functional additive (G).

The present invention described above with reference to the accompanying drawings is capable of various modifications and changes by those skilled in the art, and such modifications and changes should be construed as being included in the scope of the present invention.

Feeder: 1 Furnace: 2
Cutter: 3 Extruder: 4
Coolant: 5 Freeze Chiller: 6
First cooling rod: 61 Support: 62
Seating slit: 621 Second cooling rod: 63
Machine: 7 Die: 71
Waste Paper: W Intermediate Goods: I
Recycled resin: P

Claims (4)

a supply step (S1) in which the pulverized waste resin is supplied through a feeder;
a melting step (S2) in which the supplied waste resin is melted in a heating furnace;
An intermediate material manufacturing step (S3) of discharging the molten waste resin in the form of a dough after passing it through a sieve;
a cooling step (S4) of processing and cooling the intermediate material into a melodic shape; and
Subdivision step (S5) of cutting the processed intermediate material to a predetermined size;
including,
The cooling step (S4),
A first cooling step (S41) of immersing the processed intermediate material in cooling water, and a second cooling step (S42) of freeze-cooling the primary cooled intermediate material,
The second cooling step (S42),
The bottom surface of the first cooling rod disposed on the intermediate member, the support disposed at the rear end of the first cooling rod, the support disposed under the intermediate member, the bottom surface of the second cooling rod disposed at the rear end of the support member and disposed above the intermediate member Regenerated resin manufacturing method, characterized in that configured to pass sequentially. delete The method according to claim 1,
In the cooling step (S4), the intermediate material is processed into a plurality of melodic shapes by a processing machine having a plurality of forming holes,
The support is a method for producing a recycled resin, characterized in that it comprises a plurality of seating slits are seated and supported each melody. delete

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