KR20200053712A - Oxygen Scavenging Functional Masterbatch and Manufacturing Method of the Same - Google Patents

Abstract

The present invention discloses functional masterbatch for removing oxygen, capable of effectively blocking the contact of oxygen with an object vulnerable to oxidation, such as food, medicines, cosmetics, and the like, and a manufacturing method thereof. According to an embodiment of the present invention, the manufacturing method of the functional masterbatch for removing oxygen comprises: a step of inputting 100 wt% of polycaprolactone resin and 5 to 50 wt% of sodium metabisulfite to a mixer; a step of mixing the polycaprolactone resin and the sodium metabisulfite input to the mixer; a step of melt-extruding the mixture obtained from the mixing step through a melt extruder; a step of forming an extruded strand from the melt extrusion step into masterbatch; and a step of vacuum-packing the masterbatch.

Description

Oxygen scavenging functional masterbatch and manufacturing method of the same

The present invention relates to an oxygen removal functional masterbatch and a method for manufacturing the same, and more particularly, to a masterbatch capable of effectively blocking the contact of oxygen with an object vulnerable to oxidation of food, pharmaceuticals, cosmetics, etc., and a method for manufacturing the same .

Most foods are deteriorated by contact with oxygen in the air, resulting in deterioration in quality such as nutrient loss, pigment decomposition, enzymatic browning, and deterioration of flavor, as well as growth of aerobic microorganisms present in the food. It is also triggered. In addition to these foods, it is widely known that pharmaceutical products and cosmetics are degraded by oxidation.

In order to extend the shelf life and quality retention period of foods, medicines, cosmetics, etc., packaging technology that can remove oxygen existing inside the packaging at the beginning of storage and oxygen that penetrates from the outside of the packaging during storage during the storage period is introduced. This is required.

Gas replacement packaging, vacuum packaging, and oxygen scavengers (deoxygenators) are well known in the oxygen scavenging packaging technology, and it is widely known that the oxygen scavenger is the only one of these three technologies that can maintain the oxygen concentration inside the packaging at a low level for a long period of time. .

Conventional oxygen scavengers are encapsulated in a small pouch made of a breathable packaging material (hereinafter referred to as an oxygen scavenging composition) having an oxygen scavenging function, together with an object in the packaging of an object to be preserved (hereinafter referred to as a preservative). Enclosed.

Such conventional oxygen scavengers frequently cause problems in terms of packaging process and consumption. First, in terms of the packaging process, since a separate machine (injector) is required to encapsulate the oxygen scavenger in the packaging of the stored object, the cost and time required for the packaging process are increased accordingly. Also, in terms of consumption, when a consumer unpacks a package of a preservative with scissors, a knife, etc. due to the small size of the oxygen scavenger (generally, the horizontal and vertical dimensions are less than 5cmX5cm), the oxygen scavenger is also often used. It is cut together, causing the contents to flow out of the damaged oxygen scavenger and contaminate the enclosed product. In addition, when the preserved material is food, it is common to cook an oxygen scavenger with it.

Due to the problems of the conventional oxygen scavenger as described above, the oxygen scavenging composition is recently kneaded with a resin and then molded into a film, sheet, or container shape to produce a packaging material having an oxygen scavenging function by itself and to be preserved using the same. It is required to pack water.

Accordingly, in the present invention, a synthetic resin and an oxygen-removing functional material are mixed to present a master batch having an oxygen-removing function and a manufacturing method thereof. The oxygen removal functional masterbatch of the present invention can be used as a raw material for various packaging materials such as films, sheets, containers, tubes, bottles, and the packaging material made of the oxygen removal functional masterbatch itself has oxygen removal functionalities, thus preserving When packing the water, there is no need to enclose a separate oxygen scavenger.

The present invention has been devised to solve the above problems, and the present invention provides an oxygen removal functional masterbatch formed by kneading a synthetic resin and an oxygen removal functional material capable of solving the problems of the conventional oxygen scavenger and a manufacturing method thereof. It has a purpose.

On the other hand, the technical problem to be achieved in the present invention is not limited to the technical problem mentioned above, and other technical problems not mentioned are clearly understood by a person having ordinary knowledge in the technical field to which the present invention belongs from the following description. It could be.

As a technical method for achieving the above object, a method of manufacturing an oxygen removal functional masterbatch according to an embodiment of the present invention, 100% by weight of polycaprolactone resin and 5 to 50% by weight of sodium metabisulfite are introduced into a kneader To do; Kneading the polycaprolactone resin and sodium metabisulfite added to the kneader; Melt-extruding the mixture obtained from the kneading step through a melt extruder; Forming the extruded strand from the melt extrusion step into a masterbatch; And vacuum packing the masterbatch.

In one embodiment, the kneader is at least one of a kneader, a planetary mixer, a Banbury mixer, a butterfly mixer, and a Henschel mixer.

In one embodiment, the kneading step, kneading polycaprolactone resin and sodium metabisulfite in a kneader at 60 ° C to 80 ° C.

In addition, in the kneading step, the polycaprolactone resin and sodium metabisulfite are kneaded in a kneading machine for 5 to 30 minutes.

In one embodiment, the melt extruder is a single-screw melt extruder or twin-screw melt extruder for melt extrusion of a mixture.

In one embodiment, the forming step molds the masterbatch to a length of 3 to 5 mm.

In one embodiment, the vacuum packaging step, the master batch is vacuum-packed through a pouch and a vacuum packaging machine made of an oxygen barrier packaging material.

As a technical means for achieving the above object, the oxygen-removing functional masterbatch according to an embodiment of the present invention comprises 100% by weight of polycaprolactone resin and 5 to 50% by weight of sodium metabisulfite.

Oxygen removal functional masterbatch according to an embodiment of the present invention is used as a raw material for packaging of products vulnerable to oxidation such as food, pharmaceuticals, cosmetics, etc., effectively blocking the contact between the object and oxygen, thereby increasing the shelf life and quality maintenance of the product. I can do it.

On the other hand, the effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those skilled in the art from the following description. There will be.

1 is a flow chart showing the manufacturing process of the oxygen removal functional master batch according to an embodiment of the present invention.
Figure 2 is a block diagram showing the configuration for producing a functional oxygen removal masterbatch according to an embodiment of the present invention.
3 is a schematic diagram of an oxygen removal functional masterbatch prepared according to an embodiment of the present invention.
Figure 4 is a photograph showing the actual appearance of a functional and oxygen-depleted masterbatch prepared and vacuum packed according to an embodiment of the present invention.
Figure 5 is a graph showing the results of measuring the oxygen removal capacity of the oxygen removal functional masterbatch prepared according to one embodiment of the present invention and other embodiments.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. DETAILED DESCRIPTION The following detailed description, together with the accompanying drawings, is intended to describe exemplary embodiments of the present invention, and is not intended to represent the only embodiments in which the present invention may be practiced. The following detailed description includes specific details to provide a thorough understanding of the present invention. However, one of ordinary skill in the art to which the present invention pertains knows that the present invention may be practiced without these specific details. In addition, in the specification, when a certain part "comprising or including" a certain component, it is possible to further include other components rather than excluding other components unless otherwise specified. Means In addition, in describing embodiments of the present invention, when it is determined that a detailed description of known functions or configurations may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. In addition, terms to be described later are terms defined in consideration of functions in an embodiment of the present invention, which may vary according to a user's or operator's intention or practice. Therefore, the definition should be made based on the contents throughout this specification.

Oxygen removal functional masterbatch and its manufacturing process

1 is a flow chart showing a manufacturing process of an oxygen removal functional masterbatch according to an embodiment of the present invention, Figure 2 is a block diagram showing the configuration for manufacturing an oxygen removal functional masterbatch according to an embodiment of the present invention , FIG. 3 is a schematic diagram of an oxygen removal functional masterbatch prepared according to an embodiment of the present invention, and FIG. 4 is a photograph showing an actual appearance of an oxygen removal functional masterbatch manufactured and vacuum packed according to one embodiment of the present invention to be.

Oxygen removal functional masterbatch 10 (hereinafter referred to as masterbatch) and its manufacturing method according to an embodiment of the present invention, oxygen formed by kneading a synthetic resin and an oxygen removal functional material that can solve the problems of the conventional oxygen scavenger It is an object of the present invention to provide a removal functional master batch and a method for manufacturing the same.

Here, the masterbatch is used to give color or function to a product to be made in the process of molding by extrusion or injection using plastic raw materials (LDPE, EVA, PP, PET, PC, PVC, etc.). It means a plastic molded product that has the desired color or special function by adding additives with the desired color or special function to the raw material.

As shown in Figure 1, the master batch 10 is introduced through a manufacturing process of an input step (S10), a kneading step (S20), a melt extrusion step (S30), a molding step (S40), and a vacuum packaging step (S50). Is manufactured.

Hereinafter, the manufacturing process of the master batch 10 will be described in detail with reference to FIGS. 1 to 4.

First, the input step (S10) is a step of introducing 100% by weight of polycaprolactone resin 11 and 5-50% by weight of sodium metabisulfite 12 into the kneader 1.

Here, the kneader 1 may be at least one of a kneader machine, a planetary mixer, a Banbury mixer, a butterfly mixer, and a Henschel mixer. .

Sodium metabisulfite 12, which is introduced into the kneader 1, is a substance having an oxygen removal function that removes oxygen from the atmosphere through an oxidation reaction by using water as an active agent in the presence of moisture. . The oxidation reaction formula of sodium metabisulfite 12 is as follows: [Formula 1] and [Formula 2].

The sodium metabisulfite 12 can remove oxygen from the atmosphere through an oxidation reaction based on the oxidation reaction formulas of [Formula 1] and [Formula 2].

On the other hand, the polycaprolactone resin 11 is introduced into the kneader 1 together with the sodium metabisulfite 12 to maintain the oxygen removal function of the sodium metabisulfite 12 in the master batch 10.

Specifically, the reason for the introduction of the polycaprolactone resin 11 is that the melting point of sodium metabisulfite 12 is about 150 ° C., and sodium metabisulfite 12 is low-density polyethylene (LDPE), In order to mold into a masterbatch through at least one general-purpose resin of high-density polyethylene (HDPE), polypropylene (PP), and polystyrene (PS), a high-temperature temperature of at least 140 ° C during melt extrusion is required. Setting is required. However, it was confirmed that the oxygen removal function did not exist in the master batch formed by mixing sodium metabisulfite (12) with low-density polyethylene having the lowest melting point among the general-purpose resins and melting and extruding it at a temperature higher than 140 ° C. This is because sodium metabisulfite 12 is thermally decomposed by the high-temperature manufacturing process and loses oxygen removal function. Accordingly, a polycaprolactone resin 11 having a melting point of about 60 ° C lower than that of a general-purpose resin and capable of melt extrusion at low temperature is required.

That is, the polycaprolactone resin 11 is a material that must be introduced to mold the masterbatch 10 that maintains the oxygen removal function of sodium metabisulfite 12.

The kneading step (S20) is a step of kneading the polycaprolactone resin 11 and the sodium metabisulfite 12 introduced into the kneader 1 through the input step S10.

In this kneading step (S20), the polycaprolactone resin 11 and sodium metabisulfite 12 are set at a preset temperature (for example, 60 ° C to 80 ° C) in the kneader 1 (for example, 5 to 30 ° C). Minutes).

And in the kneading step (S20), by kneading the polycaprolactone resin 11 and sodium metabisulfite 12, it is possible to obtain a mixture of polycaprolactone resin 11 and sodium metabisulfite 12.

Melt extrusion step (S30) is a step of melt extrusion by introducing a mixture of polycaprolactone resin 11 and sodium metabisulfite 12 obtained through kneading step S20 into the melt extruder 2.

Although the melt extruder 2 is not shown in the drawing, it is a device consisting of a driving part, a feeder, a screw, a barrel, and a die, and heat-melting the mixture to be fed into the feeder , Compressing in the space between the screw and the barrel by applying pressure to the mixture melted with a screw pushes the solid bed of the mixture formed to extrude the solid phase of the mixture by a mold. At this time, the solid phase extruded by the melt extruder 2 may be in the form of a strand. However, the shape of the solid phase extruded by the melt extruder 2 may be different from the above-described strand shape.

In addition, the melt extruder 2 may be configured as a single-screw melt extruder or a twin-screw melt extruder to melt extrude a mixture of polycaprolactone resin 11 and sodium metabisulfite 12.

Here, the single-screw melt extruder means a melt extruder consisting of a single screw screw, and the twin-screw melt extruder means a melt extruder consisting of a screw twin screw.

The molding step (S40) is a step of molding the mixture in the form of strands that have been melt-extruded through the melt-extrusion step (S30) into the master batch 10 through the molding machine (3).

The molding machine 3 molds the extruded strands input from the melt extruder 2 into a pellet-shaped master batch 10. For a specific example, the molding machine 3 may mold the extruded strands into a master batch 10 in the form of pellets having a certain length (for example, 3 to 5 mm).

Vacuum packing step (S50) is a step of vacuum packaging the pouch storage device (4) and the vacuum packaging machine (5) through the molding of the master batch 10 is completed through the forming step (S40).

The pouch storage device 4 is a storage device in which the pouch 40 for storing the masterbatch 10 is stored, and the vacuum packaging machine 5 vacuum-packs the masterbatch 10 inserted in the pouch 40. It is a device for.

The master batch 10 that has undergone the vacuum packaging step (S50) is enclosed with an object such as food, medicine, and cosmetics in a vacuum packaged state in the pouch 40, thereby effectively blocking the contact between the object and oxygen.

In the following, the preferred embodiments are presented to help the understanding of the present invention, but the following examples are merely illustrative of the present invention, and it is apparent to those skilled in the art that various changes and modifications are possible within the scope and technical scope of the present invention. It is natural that such variations and modifications fall within the scope of the appended claims.

Example 1

100% by weight of polycaprolactone resin (11) and 5% by weight of sodium metabisulfite (12) are added to the kneader (1).

After the injection, the polycaprolactone resin 11 and sodium metabisulfite 12 are kneaded in a kneader 1 at 60 ° C to 80 ° C for 5 to 30 minutes.

After kneading, a mixture of polycaprolactone resin 11 and sodium metabisulfite 12, which is kneaded in a melt extruder 2, is introduced and melt-extruded in a strand form.

After melt extrusion, the mixture in the form of a strand is introduced into the molding machine 3 to mold a masterbatch 10 having a length of 3 to 5 mm.

After shaping, the master batch 10 is introduced into the pouch 40 stored in the pouch storage device 4, and the pouch 40 is vibrated and packaged through a vacuum packaging machine 5.

Example 2

The manufacturing process was the same as in Example 1 described above, but the addition ratio of sodium metabisulfite 12 in Example 1 was changed to 10% by weight.

Example 3

The manufacturing process was the same as in Example 1 described above, but the addition ratio of sodium metabisulfite 12 in Example 1 was changed to 15% by weight.

Example 4

The manufacturing process was the same as in Example 1 described above, but the addition ratio of sodium metabisulfite 12 in Example 1 was changed to 20% by weight.

Example 5

The manufacturing process was the same as in Example 1 described above, but the addition ratio of sodium metabisulfite 12 in Example 1 was changed to 30% by weight.

Example 6

The manufacturing process was the same as in Example 1 described above, but the addition ratio of sodium metabisulfite 12 in Example 1 was changed to 40% by weight.

Example 7

The manufacturing process was the same as in Example 1, but the addition ratio of sodium metabisulfite 12 in Example 1 was changed to 50% by weight.

Comparative example

In order to compare with the above-described examples, the manufacturing process is the same as the examples, but sodium metabisulfite 12 is not added to the polycaprolactone resin 11.

The oxygen removal capacity of various embodiments and comparative examples of the master batch 10 will be described through [Table 1] below.

division Oxygen removal capacity (cc / g, 72 hours) Example 1 4.40 Example 2 9.35 Example 3 12.10 Example 4 15.95 Example 5 19.80 Example 6 22.55 Example 7 25.85 Comparative example 0.00

Referring to Table 1, Example 1, in which the addition ratio of sodium metabisulfite 12 is 5% by weight, oxygen removal ability is 4.40, and Example 2, in which the addition ratio of sodium metabisulfite 12 is 10% by weight, is oxygen removal ability. In Example 3, in which the addition ratio of 9.35, sodium metabisulfite (12) was 15% by weight, the oxygen removal ability was 12.10, and in Example 4, in which the addition ratio of sodium metabisulfite (12) was 20% by weight, the oxygen removal ability was 15.95, and sodium metabisulfite In Example 5, in which the addition ratio of (12) is 30% by weight, the oxygen removal capacity is 19.80, and in Example 6, in which the addition ratio of sodium metabisulfite (12) is 40% by weight, the oxygen removal capacity is 22.55, and the addition ratio of sodium metabisulfite (12) is Example 7, which is 50% by weight, was measured to be 25.85, and the comparative example for comparison with the examples was measured to have an oxygen removal capacity of 0.

In addition, Figure 5 is a graph showing the results of measuring the oxygen removal capacity of the oxygen removal functional masterbatch prepared in accordance with one embodiment of the present invention and other embodiments of the present invention and Comparative Example 72 hours after storage of oxygen in the packaging The result of measuring the concentration (%) is shown.

Looking specifically at the graph of Figure 5, Example 1 is 19.3%, Example 2 is 17.5%, Example 3 is 16.5%, Example 4 is 15.1%, Example 5 is 13.7%, and Example 6 is 12.7. %, Example 7 was measured to be 11.5%, and Comparative Example was measured to be 20.9%.

That is, through the measurement results of [Table 1] and FIG. 5, it can be seen that the examples have been measured to have a higher oxygen removal capacity and less oxygen concentration inside the package than the comparative examples, and sodium metabisulfite (12 It can be seen that Example 7 (50% by weight) having the highest ratio of) was measured to have the highest oxygen removal capacity and the oxygen concentration inside the package.

The above description of the present invention is for illustration only, and those skilled in the art to which the present invention pertains can understand that the present invention can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the above-described embodiments are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present invention is indicated by the following claims rather than the above detailed description, and it should be interpreted that all changes or modified forms derived from the meaning and scope of the claims and equivalent concepts thereof are included in the scope of the present invention. do.

1: kneader, 2: melt extruder,
3: molding machine, 4: pouch storage,
5: vacuum packaging machine, 6: control unit,
10: masterbatch, 11: polycaprolactone resin,
12: sodium metabisulfite, 40: pouch.

Claims (8)

Adding 100 wt% of polycaprolactone resin and 5-50 wt% of sodium metabisulfite to a kneader;
Kneading the polycaprolactone resin and the sodium metabisulfite added to the kneader;
Melt-extruding the mixture obtained from the kneading step through a melt extruder;
Forming the extruded strand from the melt extrusion step into a master batch; And
Vacuum packing the masterbatch; A method of manufacturing a functional oxygen removal masterbatch comprising a. According to claim 1,
The kneader,
A method of manufacturing an oxygen removal functional masterbatch, characterized in that it is at least one of a kneader, a planetary mixer, a Banbury mixer, a butterfly mixer, and a Henschel mixer. According to claim 1,
The kneading step,
The polycaprolactone resin and the sodium metabisulfite in the kneader 60 ° C ~ 80 ° C characterized in that the production method of the oxygen removal functional masterbatch. According to claim 2,
The kneading step,
The polycaprolactone resin and the sodium metabisulfite in the kneader for 5 to 30 minutes, characterized in that the kneading method of the oxygen removal functional masterbatch. According to claim 1,
The melt extruder,
Method for producing a functional oxygen removal masterbatch, characterized in that the single-screw melt extruder or twin-screw melt extruder for the melt extrusion of the mixture. According to claim 1,
The forming step,
A method of manufacturing an oxygen removal functional masterbatch, characterized in that the masterbatch is molded to a length of 3 to 5 mm. According to claim 1,
The vacuum packaging step,
A method of manufacturing an oxygen removal functional masterbatch, wherein the masterbatch is vacuum packed through a pouch made of an oxygen blocking packaging material and a vacuum packaging machine. Oxygen removal functional masterbatch comprising 100% by weight of polycaprolactone resin and 5-50% by weight of sodium metabisulfite.

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