KR102203027B1 - Master batch for Antimicrobial film, preparation method of Antimicrobial film using the same and preparation method thereof - Google Patents

Abstract

The present invention relates to a master batch for an antibacterial film, an antibacterial film using the same, and a method for manufacturing the same, and in more detail, a master batch capable of manufacturing a film having excellent antibacterial properties, including Illite, and an antimicrobial film using the same, and preparation thereof It's about how. The present invention comprises the steps of mixing and heating the master batch and polyethylene chips containing illite; Forming the melt produced by mixing and heating with an extruder and stretching it into a film; And it provides a method for producing an antibacterial film comprising; cooling the film and winding it on a roll.

Description

Master batch for antimicrobial film, antimicrobial film using the same, and manufacturing method thereof {Master batch for Antimicrobial film, preparation method of Antimicrobial film using the same and preparation method thereof}

The present invention relates to a master batch for an antibacterial film, an antibacterial film using the same, and a method for manufacturing the same, and in more detail, a master batch capable of manufacturing a film having excellent antibacterial properties, including Illite, and an antimicrobial film using the same, and preparation thereof It's about how.

Fruits, vegetables, processed meat products, fermented foods and foods are packaged and preserved by food packaging materials during distribution and at home. In general, polyethylene (PE), polypropylene (PP), polypropylene (PP), which have excellent water resistance, oil resistance, and moldability A packaging material manufactured by coating a general-purpose thermoplastic resin such as ester (PET) on the surface of a base paper such as paper or cloth, or molding the resin into containers or films is used.

However, when the food is packaged using a packaging material using only the thermoplastic resin, there is a problem in that the food is damaged and deteriorated after a certain period of time, or bacteria or mold are generated. Accordingly, packaging materials in which antibacterial and antifungal components are added to the film itself have been developed.

For example, Korean Patent No. 10-1162767 shows an jade film printed or coated with jade ink having antimicrobial properties, but in the above case, the manufacturing process is complicated, and jade printing ink is coated with a thin thickness on the film. Due to its structure, there was a problem that the antibacterial persistence was poor. In addition, although an antimicrobial film containing sorbic acid was proposed in Korean Patent Registration No. 10-1207150, the above also contains sorbic acid, which is a synthetic preservative, so it is difficult to apply to food pujang, and there is a disadvantage that antibacterial properties are not excellent.

Therefore, the inventors of the present invention use ilite, which is a mica-like mineral rich in aluminum, which has excellent adsorption and deodorization decomposition power for heavy metals and toxic gases, high far-infrared radiation and anion generation ability at room temperature, An antibacterial film capable of suppressing the production and a method of manufacturing a master batch for an antibacterial film capable of producing the same have been developed.

Republic of Korea Patent Registration No. 10-1162767 (Name of the invention: antibacterial film wrapping paper using jade and its manufacturing method, Applicant: Lee Jong Lim, registration date: June 28, 2012) Republic of Korea Patent Registration No. 10-1207150 (Name of invention: Antibacterial film containing sorbic acid, Applicant: Lee Jong Lim, registration date: November 26, 2012)

An object of the present invention is to provide a master batch capable of producing a film having excellent antimicrobial properties, including illite, and a method for producing the same.

Another object of the present invention is to provide a method of manufacturing an antibacterial film capable of suppressing deterioration of food using a master batch manufactured through the above manufacturing method, and an antibacterial film manufactured through the method.

In order to achieve the above object, the present invention comprises the steps of: (Step 1) mixing and heating a master batch containing illite and polyethylene chips;

(Step 2) forming the melt produced by mixing and heating with an extruder and stretching it into a film; And

(Step 3) cooling the film and winding it on a roll; it provides a method for producing an antibacterial film comprising a.

In the first step, the master batch containing illite, (step a) pulverizes illite and polyethylene chips by putting illite into one pulverizer and polyethylene chips into the other pulverizer in the pulverization unit equipped with two pulverizers. Step to do;

(b) adding the powdered illite and polyethylene chips to the mixing and melting unit;

(Step c) discharging the molten mixture in which the illite and polyethylene chips are uniformly stirred inside the mixing and melting unit as an injection product; And

(Step d) cutting the injection product to produce a chip; characterized in that it is a master batch for an antibacterial film that is produced.

In step a, the two grinders may be provided with single-screw screws.

In step b, the mixing and melting portion may be maintained at a temperature in the range of 80 to 190°C.

In the step c or d, the injection product may contain 20 to 40% by weight of illite.

The mixing ratio of the injection product can be adjusted by the rotation speed of the single-shaft screw provided in the two grinders.

In addition, the antibacterial film of the present invention prepared using the antibacterial film master batch may contain 1 to 3% by weight of ilite.

The antibacterial film may have an oxygen permeability of 5000 mL/(m ² ·day) or more.

A film having excellent antibacterial and anti-fungal performance and excellent oxygen permeability can be prepared by using a master batch prepared through the method of manufacturing a master batch for an antibacterial film comprising illite provided by the present invention.

Accordingly, it is possible to provide an antibacterial film capable of extending the period of maintaining the freshness of food by suppressing the generation of bacteria and mold.

1 is a schematic diagram showing a conventional master batch manufacturing apparatus.
2 is a perspective schematic diagram showing an apparatus for manufacturing a master batch for an antibacterial film of the present invention.
Figure 3 is a flow chart for explaining the manufacturing method of the antimicrobial film master batch of the present invention.
Figure 4 is a flow chart for explaining the manufacturing method of the antibacterial film of the present invention.
Figure 5 is a photograph showing the state of the antibacterial film master batch of the present invention.
6 is a graph showing the results of TGA analysis of the master batch for an antimicrobial film of the present invention.
7 is a graph showing the results of FT-IR analysis of the master batch for an antimicrobial film of the present invention.
8 is a scanning electron microscope photograph of the surface shape of the master batch for an antibacterial film of the present invention.
9 is a photograph showing the state of the antibacterial film of the present invention.
10 is a graph showing the results of TGA analysis of the antibacterial film of the present invention.
11 is a graph showing the FT-IR analysis results of the antibacterial film of the present invention.
12 is a scanning electron microscope photograph of the surface shape of the antibacterial film of the present invention.
13 is a graph showing the oxygen permeability analysis result of the antibacterial film of the present invention.
14 is a photograph showing the antibacterial activity test result of the antibacterial film of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments of the present invention are provided to more completely explain the technical idea of the present invention to those of ordinary skill in the art, and the following examples may be modified in various other forms, and The scope of the technical idea is not limited to the following examples. Rather, these embodiments are provided to make the present disclosure more faithful and complete, and to completely convey the technical idea of the present invention to those skilled in the art. In this specification, the same reference numerals mean the same elements. Furthermore, various elements and areas in the drawings are schematically drawn. Therefore, the technical idea of the present invention is not limited by the relative size or spacing drawn in the accompanying drawings.

Figure 2 is a perspective schematic diagram showing an apparatus for manufacturing a master batch for an antimicrobial film of the present invention, Figure 3 is a flow chart for explaining the manufacturing method of the master batch for an antimicrobial film of the present invention, Figure 4 is of the present invention It is a flow chart for explaining the manufacturing method of an antibacterial film.

First, an apparatus for manufacturing a master batch for an antibacterial film containing ilite of the present invention will be described in detail using FIG. 2.

An apparatus for manufacturing a master batch for an antibacterial film according to the present invention includes a pulverization unit 100 provided with a first pulverizer 110 and a second pulverizer 120, and a communication unit 130 coupled to the pulverization unit 100. ), the mixing and melting unit 200 coupled to the communication unit 130, a cooling unit 300 for cooling the injection product discharged from the mixing and melting unit, and a cutting unit 400 for cutting the injection product from one side of the cooling unit It is composed by

The pulverization unit 100 of the device for manufacturing the antimicrobial film master batch of the present invention is for pulverizing a polymer resin and inorganic material, and includes a first pulverizer 110 and a second pulverizer 120 in a cylindrical shape. The first grinder 110 and the second grinder 120 are provided with uniaxial screws 111 and 121 inside. Motors 112 and 122 are coupled to one side of the first grinder 110 and the second grinder 120 to rotate the single-axis screws 111 and 121, and the first grinder 110 and the second grinder 120 Each hopper 140 capable of supplying raw materials is coupled to the upper part of the two grinder 120.

The raw material injected into each of the hoppers 140 is supplied to the inside of the first grinder 110 and the second grinder 120 and moved while being pulverized by the single-screws 111 and 121 to make finer powder. Is discharged, and the discharged raw materials fall freely through the communication unit 130 and are supplied to the mixing and melting unit 200.

The mixing and melting part 200 of the apparatus for manufacturing the antimicrobial film master batch of the present invention includes an injection cylinder 210, a heating furnace 220 capable of applying heat from the outside of the injection cylinder 210, and the injection cylinder ( 210) It includes a two-axis screw 211 provided therein and a motor unit 212 composed of two motors capable of rotating the two-axis screw 211.

When the raw material freely dropped through the communication unit 130 is supplied to the injection cylinder 210 of the mixing and melting unit 200, heat is supplied from the heating furnace 220 outside the injection cylinder 210 The resin is melted and mixed with micronized inorganic matter. In addition, the mixed melt in which the molten polymer resin and the inorganic material are mixed is more evenly mixed by rotation of the screw 211 of the two shafts, and the mixed melt moves to the outlet and from the injection cylinder 210 to the injection product 500. Will be discharged.

The injection product 500 is transported to the air-cooled or water-cooled cooling unit 300 of the apparatus for manufacturing the antibacterial film master batch of the present invention and cooled. The cooled injection product is cut into scraps 510 in the cutting part 400 and manufactured into a master batch for an antibacterial film.

The cutting part 400 of the device for manufacturing the master batch for an antibacterial film of the present invention is composed of a guide roller 410 and a cutter 420. The cutter 420 is not particularly limited, but may be a circular sawtooth cutter as shown in the drawing. A motor (not shown) is coupled to one side of the circular sawtooth cutter to induce cutting through rotation. When the injection product 500 is transferred to the cutting unit, it is supplied to the cutter 420 through a guide roller 410, and the injection product is cut into scraps 510 of a certain size by the cutter 420. The size of the scrap 510 may be adjusted according to the size of the circular teeth or the rotation speed of the circular teeth.

Next, a method of manufacturing a master batch for an antibacterial film containing ilite of the present invention will be described in detail with reference to FIG. 3.

First, illite and polyethylene chips are pulverized (step a). Illite and polyethylene chips are pulverized in a pulverization unit equipped with two pulverizers, illite is put in one pulverizer and polyethylene chips are put in the other pulverizer, and are finely pulverized by a single screw provided in each pulverizer.

At this time, the polyethylene has a melt index of 20 to 30 g/10 min (190°C, 2.16 kg) and a density of 0.90 to 0.95 g/cm 3 I can.

The illite may be powdered to a particle size of 10 μm or less, preferably, powdered to a particle size of 1 to 10 μm, more preferably powdered to a particle size of 6 to 10 μm. If the particle size of illite exceeds 10 μm, aggregation may occur during manufacturing of the master batch, which is not preferable. In addition, the illite may have a specific surface area of 7 to 15 m 2 /g, preferably 11 to 15 m 2 /g.

More preferably, the illite may be surface-modified in order to improve dispersibility and thereby increase the miscibility with the polyethylene chip. The illite may be surface-modified by immersing in a reaction solvent in which a silane coupling agent is dissolved in an organic solvent, followed by stirring, and the coupling agent may be contained in an organic solvent in an amount of 1 to 5% by weight compared to illite. If the content of the silane coupling agent is less than 1% by weight relative to illite, the surface of illite is not sufficiently modified, and if it exceeds 5% by weight, the surface modification effect according to the weight is insignificant, which is not preferable. In addition, the stirring time is 1 to 5 hours, and the stirring temperature is preferably 100 to 150°C. If the stirring time or the stirring temperature is less than the above range, the surface of the illite is not sufficiently modified, and if it exceeds the above range, the surface modification effect according to time or temperature is insignificant, which is not preferable.

At this time, the organic solvent is dichloromethane (dichloromethane), tetrahydrofuran (THF), ethanol (ethanol), methanol (methanol), acetone (acetone), dimethylformamide (DMF), dimethylsulfoxide (dimethylsulfoxide). ; DMSO) and dioxane (dioxane) may be one or more selected from the group consisting of.

In addition, the silane coupling agent bis [3-triethoxysilylpropyl] tetrasulfide (triethoxysilylpropyl tetrasulfide; TESPT), mercaptopropyl triethoxysilane (mercaptopropyl triethoxysilane), aminopropyl triethoxysilane (aminopropyl triethoxysilane), Chloropropyl triethoxysilane, vinyltriethoxysilane, methacryloxytpropyl triethoxysilane, methacryloxypropyl triethoxysilane, glycidoxypropyl Triethoxysilane (glycidoxypropyl triethoxysilane), isocyanatopropyl triethoxysilane (isocyanatopropyl triethoxysilane), and cyanatopropyl triethoxysilane (cyanatopropyl triethoxysilane) may be at least one selected from the group consisting of.

In the method for producing a master batch for an antibacterial film of the present invention, the powdered illite and polyethylene chips are added to the mixing and melting unit (step b). The mixed and melted portion is maintained in a temperature range of 80 to 190°C to melt the polyethylene chip, and the melted polyethylene chip and illite are uniformly mixed by a twin screw provided inside the mixed and melted portion. It is preferable that the two-axis screw rotates at a speed of 200 to 500 rpm.

Next, the molten mixture in which illite and polyethylene chips are uniformly agitated inside the mixing and melting unit is discharged as an injection product (step c). At this time, the discharged injection product may contain 20 to 40% by weight of illite. If the content of illite in the injection product is less than 20% by weight, the effect of improving oxygen permeability and antibacterial properties is insignificant, and when it exceeds 40% by weight, the oxygen permeability and antibacterial properties increase, but the processability decreases and the dispersibility decreases, thereby being dispersed within the injection machine. It is not desirable because it is not.

At this time, the mixing ratio of the injection product is characterized in that the rotation speed of the single-axis screw provided in the two pulverizers of the pulverizer is adjusted. When manufacturing a master batch, conventional techniques manufacture a master batch by supplying quantitative illite powder and polymer resin chips to the same hopper, pulverizing and melting them, as shown in FIG. 1. However, since illite has a large difference in specific gravity from polymer resins, it is very difficult to uniformly mix illite because it is difficult to control the ratio of illite when manufacturing a master batch in this manner. On the other hand, in the present invention, the mixing ratio of illite and polymer resin is fixed by supplying illite and polymer resin to the inside of the first and second pulverizers through each hopper and adjusting the rotation speed of the screw provided in each pulverizer. I can keep it. That is, through the present invention, illite can be uniformly dispersed, so that a master batch having uniform performance and effect can be easily manufactured.

Finally, a master batch for an antimicrobial film is prepared by cutting the discharged injection product into chips after cooling it (step d).

Next, a method of manufacturing an antibacterial film using a master batch for an antibacterial film of the present invention will be described in detail with reference to FIG. 4.

First, the master batch and polyethylene chips containing illite prepared through the method of manufacturing a master batch for an antibacterial film of the present invention are mixed and heated (step 1).

Next, the melt produced by mixing and heating is molded with an extruder and stretched into a film (step 2). At this time, the thickness of the film may be 0.03 ~ 0.07mm.

Finally, the film is cooled and wound on a roll to prepare an antibacterial film (step 3).

The antibacterial film of the present invention prepared through the above manufacturing method is characterized in that it contains 1 to 3% by weight of illite.

In addition, the antibacterial film of the present invention may have a tensile strength of 45 to 55 MPa, and an oxygen permeability of 5000 mL/(m ² ·day) or more.

The specific manufacturing method of the antimicrobial film master batch and the antibacterial film of the present invention, and the physical properties and performance of the antimicrobial film master batch and the antibacterial film prepared through the same are as follows.

<Preparation of master batch for antibacterial film>

In order to constantly control the content of illite in the master batch to 30% by weight, two feeders were used to measure the feed rates of polyethylene chips and illite, and then proceed. At this time, the polyethylene chip was a low-density polyethylene chip having a melt index of 24.0g/10min (190℃, 2.16kg) and a density of 0.915g/cm3, and Illite had a particle size of 4~6㎛ and a specific surface area of 11㎡. Those less than /g (hereinafter referred to as'Ilite M') and those having a particle size of 6 to 10 µm and a specific surface area of 11 m 2 /g or more (hereinafter referred to as'Ilite Y') were used. In order to manufacture a master batch for an antibacterial film, polyethylene chips and each ilite were put into a simultaneous rotary twin-screw extruder at a temperature of 80 to 190°C under the conditions shown in Table 1 below, and then the extrudate from the screw was pelletized. A master batch for the final antibacterial film was prepared by pelletizing using a jersey (speed of 4.3 Hz), and the state of the prepared master batch is shown in FIG. 5. At this time, the master batch containing illite M was denoted MB M, and the master batch containing illite Y was denoted MB Y.

Illite Feed rate (Hz) Screw speed (rpm) MB M Illite M 0.6 280 MB Y Illite Y 0.9 480

<Analysis of master batch for antibacterial film>

Analysis Example 1-1. Thermogravimetric analysis

Thermogravimetric analysis (TGA) was performed to analyze the illite content in the prepared antimicrobial film master batch. Thermogravimetric analysis was performed from 25° C. to 700° C. at a rate of 10° C./min in a nitrogen atmosphere using the Q500 TA equipment, and the results are shown in FIG. 6.

Referring to FIG. 6, the sudden drop in weight around 400°C is seen as a phenomenon caused by combustion of polyethylene, and the section stabilized again after 500°C was selected as the final illite content. As a result of TGA analysis, it was confirmed that the content of illite in the master batch for antibacterial film reached close to 30% by weight as the target, and the content was well controlled.

Analysis Example 1-2. FT-IR analysis

FT-IR analysis was performed to analyze the components of the prepared antimicrobial film master batch. The analysis was performed using the Attenuated Total Reflection (ATR) method, and the results are shown in FIG. 7.

Referring to FIG. 7, a spectrum in the range of 4000-650 cm ^-1 is shown for pure polyethylene and the prepared master batch. When looking at the spectrum of the master batch, the peak was confirmed at 1000cm ^-1 point, which is the same as that of pure Illite, which corresponds to the Si-O stretching vibration. In addition, CH expansion and contraction vibration, which is the peak of 2900 and 2850 cm ^{-1 that} can be seen in the spectrum of pure polyethylene, was confirmed. The peak seen at 3630cm ^-1 corresponds to OH stretching.

Analysis Example 1-3. Scanning electron microscope analysis

By scanning the surface of the sample with TESCAN's MIRA3 equipment, the dispersibility and particle size of the illite contained in the master batch were confirmed. The master batch sample was cut parallel to the injection direction and coated with platinum on the surface, and a cross-section was taken at 5 kV, and the results are shown in FIG. 8.

Referring to FIG. 8, illite particles dispersed in the polyethylene matrix can be seen. It was confirmed that the particles of both companies were uniformly dispersed in the polyethylene matrix without agglomeration, and the particle sizes were all smaller than 10 μm.

<Production of antibacterial film>

The antibacterial film master batch prepared above was mixed with polyethylene pellets to prepare an antibacterial film, and the state of the prepared film is shown in FIG. 9. In the prepared film, the final content of illite was adjusted to 1 to 2 wt%, and the thickness of the film was stretched to 0.04 to 0.05 mm. At this time, a film prepared using a master batch containing illite M (MB M) was denoted as Flim M, and a film prepared using a master batch containing illite Y (MB Y) was denoted as Flim Y.

<Analysis of antibacterial film>

Analysis Example 2-1. Thermogravimetric analysis

Thermogravimetric analysis (TGA) was performed to analyze the illite content in the prepared antibacterial film. Thermogravimetric analysis was performed from 25° C. to 700° C. at a rate of 10° C./min in a nitrogen atmosphere using the Q500 TA equipment, and the results are shown in FIG. 10.

Referring to FIG. 10, the sudden drop in weight around 400° C. appears to be a phenomenon caused by combustion of polyethylene, and a section stabilized again after 500° C. was selected as the final illite content. As a result of TGA analysis, the content of illite in the antibacterial film was found to be 1 to 2% by weight.

Analysis Example 2-2. FT-IR analysis

FT-IR analysis was performed to analyze the components of the prepared antibacterial film. The analysis was performed using the Attenuated Total Reflection (ATR) method, and the results are shown in FIG. 11.

Referring to FIG. 11, a spectrum in the range of 4000 to 650 cm ^-1 for pure polyethylene and the prepared antibacterial film is shown. The spectrum of the film was also able to confirm the peak at the point of 1000cm ^-1 (Si-O stretching vibration), similar to that of pure Illite. The spectrum of the film decreased in size of the peak at 1000cm ^-1 compared to the master batch, which appears to be the result of the film having less illite content than the master batch. In addition, 2900, 2850cm ^-1 peak CH expansion and contraction vibration found in the spectrum of pure polyethylene could be confirmed.

Analysis Example 2-3. Scanning electron microscope analysis

The surface of the sample was scanned with TESCAN's MIRA3 instrument to confirm the dispersibility and particle size of the illite contained in the polymer matrix of the film. The film sample was cut to a size of 5 mm horizontally and vertically, coated with platinum on the surface in the same manner as the master batch, and photographed a cross section at 10 kV, and the results are shown in FIG. 12.

Referring to FIG. 12, particles of illite dispersed in the polyethylene matrix can be seen. It was confirmed that both films had illite particles evenly dispersed in the polyethylene matrix.

<Performance evaluation of antibacterial film>

Evaluation Example 1. Tensile strength

The tensile strength of the antimicrobial film was measured using a 1kN universal testing machine DUT-3000CM (Daekyung Engineering Co., Ltd.) in the KS M 3001: 2001 test standard at the Korea Testing Institute of Technology (KTL), and the results are shown in Table 2 below. .

Tensile strength (Mpa) Pure polyethylene film 34.3 Of the present invention
Antibacterial film Film M 34.0 Film Y 49.8

Evaluation Example 2. Oxygen Permeability

The oxygen permeability of the antimicrobial film was measured by using an OX-TRAN Model 2/21 (Mocon, USA) equipment by the ASTM D3985 method at the Korea Polymer Testing Institute (KOPTRI), and the results are shown in FIG. At this time, the oxygen permeability of the general film has a value of 2607 mL/(m ² ·day).

Referring to Figure 13, it can be seen that the oxygen permeability of the antibacterial film of the present invention has a value that is about twice as high as that of the general polyethylene film, which is due to the opening of the gap between the polymer chains as illite particles are added between the polyethylene matrix. It seems to be the result of the space that oxygen can move.

Evaluation Example 3. Antibacterial activity

The antimicrobial effect of the antimicrobial film was evaluated by the ASTM E2149-13a method by the Korea Institute of Chemical Convergence Testing (KTR). Staphylococcus aureus ATCC 6538 was used as the test strain, and an antibacterial film was put in the test bacteria solution inoculated with the test strain, and the test was performed by shaking. Into 50±0.5 mL of the prepared test bacteria solution, 1.0±0.1 g of an antibacterial film was put, and after stirring for 18h±5min under conditions of 37±2°C and 200 rpm in a shaking incubator, the number of viable cells was measured to evaluate the antibacterial effect on the strain. The results are shown in Table 3 and FIG. 14 below.

Initial (CFU/mL) After 18 hours (CFU/mL) Pure polyethylene film 2.6 × 10 ⁵ 3.4 × 10 ⁵ Of the present invention
Antibacterial film Film M 4.8 × 10 ⁴ Film Y 2.1 × 10 ⁴

Referring to Table 3 and FIG. 14, the reduction rate for S. aureus was 85.9% in the case of Film M and 93.8% in the case of Film Y. Accordingly, it was confirmed that the antimicrobial activity of the antibacterial film of the present invention was very superior to that of the general polyethylene film.

100: grinding unit 110: first grinding machine
111: 1-axis screw 112: motor
120: second grinder 121: single screw
122: motor 130: communication part
140: hopper 200: mixed and melted part
210: injection cylinder 211: 2-axis screw
212: motor unit 220: heating furnace
300: cooling part 400: cutting part
410: guide roller 420: cutter
500: injection 510: scrap

Claims (12)

(Step 1) mixing and heating a master batch containing illite and polyethylene chips;
(Step 2) forming the melt produced by mixing and heating with an extruder and stretching it into a film; And
(Step 3) cooling the film and winding it on a roll; including,
The master batch containing illite in step 1 above,
(Step a) In the pulverization unit equipped with two pulverizers, illite with a specific surface area of 11 to 15㎡/g is added to one pulverizer, and the melt index is 20 to 30g/10min (190℃, 2.16kg) in the other pulverizer. , Pulverizing illite and polyethylene chips by adding polyethylene chips having a density of 0.90 to 0.95 g/cm 3;
(b) adding powdered illite and polyethylene chips to a particle size of 6 to 10 μm into a mixing and melting unit;
(Step c) discharging the molten mixture in which the illite and polyethylene chips are uniformly stirred inside the mixing and melting unit as an injection product; And
(D step) cutting the injection product to produce chips; Including,
In the pulverization of illite and polyethylene chips in step a, in the pulverization unit provided with two pulverizers, illite is introduced into one pulverizer and polyethylene chips are pulverized into the other pulverizer, and the two pulverizers are single-axis It characterized in that it comprises a screw,
The method of manufacturing an antibacterial film, characterized in that the mixing and melting part in step b includes a twin screw rotating at a speed of 200 to 500 rpm. delete (Step a') Powdering illite with a specific surface area of 11 to 15㎡/g and polyethylene chips with a melt index of 20 to 30g/10min (190℃, 2.16kg) and a density of 0.90 to 0.95g/cm3 step;
(b' step) adding powdered illite and polyethylene chips to a particle size of 6 to 10 μm into a mixing and melting unit;
(c' step) discharging the molten mixture in which the illite and polyethylene chips are uniformly stirred inside the mixing and melting unit as an injection product; And
(d' step) cutting the injection product to produce chips; including,
In the pulverization of illite and polyethylene chips in step a', illite is put into one pulverizer and polyethylene chips are pulverized in the other pulverizer in a pulverization unit equipped with two pulverizers, and the two pulverizers are 1 It is characterized in that it has a shaft screw,
The method of manufacturing a master batch for an antimicrobial film, characterized in that the mixing and melting part in the step b'comprises a biaxial screw rotating at a speed of 200 to 500 rpm. delete delete delete The method of claim 3,
The method of manufacturing a master batch for an antibacterial film, characterized in that the temperature is maintained in the range of 80 ~ 190 °C in the step b'. The method of claim 3,
The method of manufacturing a master batch for an antimicrobial film, characterized in that the injection product in the step c'or step d'contains 20 to 40% by weight of illite. The method of claim 3,
The mixing ratio of the injection product is a method of manufacturing a master batch for an antibacterial film, characterized in that the rotation speed of a single screw provided in two grinders is adjusted. An antibacterial film prepared by the manufacturing method of claim 1, wherein the antibacterial film contains 1 to 3% by weight of illite, the antibacterial film has a tensile strength of 45 to 55 MPa, and an oxygen permeability of 5000 mL/(m ² · day) or more antibacterial film. delete delete

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