KR102392090B1 - Plastic bag manufacturing apparatus using recycled resin and biodegradable resin and plastic bag manufactured through the same - Google Patents

Abstract

The present invention relates to a plastic bag manufacturing device and a plastic bag manufactured by using the same, wherein the plastic bag is made of a recycled resin and a biodegradable resin, is made of two or more multi-layers, and has excellent tensile strength, tear strength, and elongation by individually applying novel or recycled high-density polyethylene (HDPE) and linear low-density polyethylene (LLDPE) or by mixing biodegradable resins to form the plastic bag.

Description

A device for manufacturing a plastic bag using recycled resin and biodegradable resin, and a plastic bag manufactured through the same {.}

The present invention provides an apparatus for manufacturing a plastic bag excellent in tensile strength, tear strength and elongation by using newly or regenerated high density polyethylene (HDPE), linear low density polyethylene (LLDPE) and biodegradable resin, and It relates to a plastic bag manufactured through this.

As is well known, a plastic bag manufactured using polyethylene is in the form of a thin and transparent film, and is made by a polyethylene vinyl manufacturing apparatus using a polyethylene synthetic resin as a raw material.

These plastic bags are widely used for industrial purposes (eg, packaging, waterproofing, etc.), agricultural purposes (eg, warming and promoting crop growth), and daily life (eg, various bags), etc., and are widely used in our daily life. It has become a very frequently used daily necessities.

As an apparatus for manufacturing a plastic bag as described above, Registered Utility Model No. 20-0343938 (vinyl guide roller for polyethylene vinyl maker) registered in 2004, while referring to the prior art, includes a lower base, a hopper, a raw material supply unit, Disclosed is a polyethylene vinyl manufacturing machine equipped with a melting section, a mold section, a blowing section, an air guide tube, a cooling section, and the like.

However, since plastic bags must have excellent tensile strength, tear strength and elongation strength depending on their use, high-density polyethylene (HDPE) and linear low-density polyethylene (LLDPE) are melted together and molded or recycled raw material resin is melted and molded. is being developed in various ways, and a plastic bag manufacturing technique having superior tensile strength, tear strength and elongation strength is required.

In the present invention, in a plastic bag made of two or more multilayers, the plastic bag is newly or regenerated high-density polyethylene (HDPE), linear low-density polyethylene (LLDPE) individually applied, or a biodegradable resin is mixed to form a plastic bag. , An object of the present invention is to provide an apparatus for manufacturing a plastic bag that has excellent tensile strength, tear strength and elongation strength and can be easily manufactured, and a plastic bag manufactured using the same.

The purpose of the embodiments of the present invention is not limited to the above-mentioned purpose, and other objects not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention belongs from the following description. .

According to an aspect of the present invention, mixed with any one or more of high-density polyethylene (HDPE), linear low-density polyethylene (LLDPE), which is a new or regenerated recycled raw material resin, or the new or regenerated recycled raw material resin is high-density polyethylene (HDPE) A first raw material supply unit to which any one of which is mixed with any one or more of , linear low-density polyethylene (LLDPE), and a biodegradable resin is mixed, is supplied;

Mixed with any one or more of high-density polyethylene (HDPE) and linear low-density polyethylene (LLDPE), the new or regenerated recycled raw material resin, or the new or regenerated recycled raw material resin is high-density polyethylene (HDPE), linear low-density polyethylene (LLDPE) A first melting part that is mixed with any one or more of the biodegradable resin and melts any one of the mixed resin into a resin,

Mixed with any one or more of high-density polyethylene (HDPE) and linear low-density polyethylene (LLDPE), the new or regenerated recycled raw material resin, or the new or regenerated recycled raw material resin is high-density polyethylene (HDPE), linear low-density polyethylene (LLDPE) A second raw material supply unit to which any one of which is mixed with any one or more of the biodegradable resin is mixed;

The new or regenerated recycled raw material resin is mixed with any one or more of high-density polyethylene (HDPE) and linear low-density polyethylene (LLDPE), or the new or regenerated recycled raw material resin is high-density polyethylene (HDPE), linear low-density polyethylene (LLDPE) A second melting part for melting any one of a mixture of any one or more and a mixture of a biodegradable resin into a resin,

An extrusion mold part for extruding the resin transferred through the first molten part and the second molten part into a film resin, a blow molding part for blow molding the film resin discharged from the extrusion mold part using a mandrel shaft, and the extrusion It characterized in that it comprises a blower for supplying air to the mold part and the blow molding part, and a conveying part for transporting the plastic bag molded through the blow molding part.

In addition, the extrusion mold part applied to the present invention includes a mold body provided with a blow die to have an extrusion groove thereon, an air hole formed through the outer peripheral surface of the mold body to the extrusion groove, and a circular shape on the upper part of the mold body. a discharge port formed to discharge the film resin; a first flow path extending from the lower center of the mold body to the upper side and divided at a first position to be connected to the discharge port to form the inner surface of the plastic bag; It extends from the lower side to the inside, is divided around the periphery of the first flow path, extends upward, and is connected to the first flow path at a second position spaced apart from the discharge port by a predetermined interval downward to form the outer surface of the plastic bag. A plastic bag manufacturing apparatus including a second flow path may be provided.

According to another aspect of the present invention, a plastic bag manufactured by using the plastic bag manufacturing apparatus may be provided.

In the present invention, the new or regenerated recycled raw material resin on the inner surface, outer surface, and middle surface is mixed with any one or more of high-density polyethylene (HDPE) and linear low-density polyethylene (LLDPE), or the new or regenerated recycled raw material resin is high-density polyethylene (HDPE), linear low-density polyethylene (LLDPE), mixed with any one or more, and by molding a plastic bag using a resin mixed with a biodegradable resin, it has excellent tensile strength, tear strength and elongation strength and can be easily manufactured. there is.

1 is a view illustrating an apparatus for manufacturing a plastic bag according to an embodiment of the present invention;
2 is a view illustrating an extrusion mold provided in an apparatus for manufacturing a plastic bag according to an embodiment of the present invention;

Advantages and features of embodiments of the present invention, and methods of achieving them, will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the art to which the present invention pertains It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

In describing the embodiments of the present invention, if it is determined that a detailed description of a well-known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, the terms to be described later are terms defined in consideration of functions in an embodiment of the present invention, which may vary according to intentions or customs of users and operators. Therefore, the definition should be made based on the content throughout this specification.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First, when explaining high-density polyethylene and linear low-density polyethylene, high-density polyethylene (HDPE) has high hardness and high temperature range, so it has excellent electrical insulation and chemical resistance. used

In addition, linear low-density polyethylene (LLDPE) is generally used for injection molding or film molding, and its molecular weight distribution is similar to that of high-density polyethylene (HDPE), and when heated, melt viscosity is relatively high, and agricultural house vinyl , It has better crystallinity than low-density polyethylene (LDPE), which is mainly applied to inner packaging materials for food, fertilizer bags, etc.

On the other hand, the biodegradable resin applied to the present invention is an embodiment, and when PLGA [Poly (lactide-co-glycolide)] is applied, PLGA is a simple linear polymer with high crystallinity and no side branches. , it is almost insoluble in organic solvents, so it is molded in a molten state.

The decomposition rate is different depending on the composition ratio of lactide and glycolide in the PLGA copolymer, and the 50:50 ratio shows the fastest decomposition rate.

PLGA applied to the present invention makes polymeric PLGA by copolymerizing lactide and glycolide, which are monomers.

Lactide was purchased from l Daejeong Chemical Co., Ltd., and the catalyst used was stannous oxide (Junsei chemical), and the azeotropic solvent was product name P-Xylene ( Yakuri pure chemical) is applied.

For example, in a flask of 500 ml, 410 g (4.55 mol) of lactic acid, 2 g (0.5 Wt%) of stannous oxide as a catalyst, and 100 ml of solvent P-Xylene Then, while stirring at 900rpm, the temperature was maintained at 110℃-140℃, and H2O, a by-product, was obtained by azeotropic distillation for 5 hours, and the solvent P-xylene was removed.

After that, the catalyst is filtered to remove stannous oxide, and recrystallization is used to purify the produced monomer, and the purification process is performed with lactide and lactide in a 500 ml flask in a glove box. Toluene is added in a ratio of 1:3 and heated to 70° C. while stirring to completely dissolve lactide, and then slowly cooled at room temperature to recrystallize.

Toluene is removed from recrystallized lactide through vacuum drying, and the above process is repeated 3 times to obtain colorless and transparent lactide.

Glycolide was purchased from Daejung Chemical Co., Ltd., and the product name Stannous oxide (Junsei chemical) was used as the catalyst.
And the azeotropic distillation solvent uses the product name P-Xylene (Yakuri pure chemical).

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It is obtained by PLGA copolymerization of the materials provided as above. In copolymerization, the product name Stannous oxide (Junsei chemical) is used for the catalyst, and the product name is Toluene (Daejeong Hwageum) as the solvent.

The recrystallized lactide and glycolide prepared above were added in a molar ratio of 8:2, 1 g of stannous oxide as a catalyst and 80 ml of toluene as a solvent were added and stirred. To remove a small amount of moisture while maintaining the temperature of 140°C, the solvent is removed by distillation to remove p-xylene, and the temperature is heated and maintained at 160°C for 30 hours for polymerization experiment, followed by stirring.

After the reaction is completed, the producter purification process is filtered after completely dissolving the solvent chloroform and producter in a ratio of 3:1.

At this time, the catalyst stannous oxide (stannous oxide) is not dissolved in the solvent is caught. Next, in order to remove unreacted substances, ethanol was put into a 1000 ml beaker and stirred, and then the product dissolved in the solvent was dropped to obtain a white polymer, which was filtered again to remove the ethanol and solvent, and was then placed in a vacuum oven. Apply after drying at 35°C for 24 hours at 2 Torr pressure.

In addition, other biodegradable resins applied to the present invention are polylactic acid (PLA) / polybutylene

Apply by blending adipate terephthalate (PBAT)/polyethylene oxide (PEO).

PLA, PBAT, and PEO applied to the present invention are dried at a temperature of 55° C. for at least 24 hours in a dryer before blending to prevent deterioration of physical properties due to moisture during processing.

The present invention puts PLA: 59, PBAT: 29, and PEO: 2 in a metal tray in order to increase the dispersibility of PEO, and stores PEO in a vacuum oven (JSVO-60T, JSR, KOREA) at 80° C. for 30 minutes. Prepare by performing pre-treatment to dissolve and PBAT on the surface.

In the present invention, the biodegradable resin provided as above can be used selectively or in combination.

The new or regenerated recycled raw material resin applied to the present invention is mixed with any one or more of high-density polyethylene (HDPE) and linear low-density polyethylene (LLDPE), or the new or regenerated recycled raw material resin is high-density polyethylene (HDPE), linear low-density polyethylene (LLDPE) refers to a mixture of any one or more and a mixture of biodegradable resin (hereinafter referred to as raw material 1).

1 is a view illustrating an apparatus for manufacturing a plastic bag according to an embodiment of the present invention, and FIG. 2 is a view illustrating an extrusion mold provided in the apparatus for manufacturing a plastic bag according to an embodiment of the present invention.

1 and 2 , an apparatus for manufacturing a plastic bag according to an embodiment of the present invention includes a first raw material supply unit 110 , a first melting unit 120 , a second raw material supply unit 130 , and a second melting unit 140 , an extrusion mold unit 150 , a blow molding unit 160 , a blower unit 170 , a transfer unit 180 , and the like.

On the other hand, although not shown in the present invention optionally, a film such as a single layer, two layers or three layers may be selectively manufactured by further including a third raw material supply part and a third melting part.

The first raw material supply unit 110 is high-density polyethylene (HDPE), linear low-density polyethylene (LLDPE) when it is put in a chip state together with any one or two of the selected material to be mixed with any one or two of the selected material in a chip state. It can be supplied to the unit 120 .

The first melting part 120 may melt the raw material 1 and supply it as a resin.

When the second raw material supply unit 130 and the second molten unit 140 are fed using the same material as the raw material 1 , they may be supplied to the second fusion unit 140 .

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The second melting part 140 may be supplied as a resin after melting when the raw material 1 is supplied.

The third raw material supply part and the third melting part (not shown) are for supplying the film resin located on the intermediate surface between the inner surface and the outer surface, and the present invention uses raw material 1 as the intermediate surface.

The extrusion mold part 150 extrudes the raw material 1 resin for molding the inner surface, the outer surface, and the middle surface to form a film resin, and the extrusion groove 151 , the blow die 152 , the mold body 153 , and the first air It may include a hole 154 , a discharge port 155 , a first flow path 156 , a second flow path 157 , and the like.

Here, the internal temperature of the extrusion mold part 150 may be maintained in a temperature range of approximately 120-150 °C.

The mold body 153 is provided with a blow die 152 so as to have an extrusion groove 151 on the upper portion, and a first air hole 154 is formed on the side of the blow die 152 through an extrusion groove on the outer circumferential surface of the mold body 153 . Up to 151 may be formed through.

The air supplied from the blower 170 to be described later through the first air hole 154 is discharged into the extrusion groove 151, and the film resin discharged through the outlet 155 to be described later is cooled to form a film. It can be transported along the outer peripheral surface of the romantic mandrel shaft (161).

The discharge port 155 is formed in a circular shape on the upper portion of the mold body 153 to discharge the film resin, and the resin in which the raw material 1 is molded can be discharged on the inner surface, the outer surface, and the middle surface.

The first flow path 156 extends from the lower center of the mold body 153 to the upper part and is divided at the first position to be connected with the outlet 155 to form the inner surface of the plastic bag, and the raw material 1 resin is supplied to the outlet ( 155) through the extrusion groove 151 may be discharged into the interior.

The second flow path 157 extends from the lower side of the mold body 153 to the inside, is divided around the first flow path 156 and extends upward, and at the outlet 155 to form the outer surface of the plastic bag. It is connected to the first flow path 156 at a second position spaced downward by a predetermined interval, and the raw material 1 is discharged into the extrusion groove 151 through the discharge port 155 .

The third flow path extends from the lower side of the mold body 153 to the inside, is divided around the first flow path 156 and extends upward, from the outlet 155 to the bottom to form the middle surface of the plastic bag. It is connected to the first flow path 156 and the second flow path 157 at a second position spaced apart by a predetermined interval, so that the raw material 1 resin is supplied and discharged into the extrusion groove 151 through the discharge port 155 .

The blow molding unit 160 is to blow molding the raw material 1 resin discharged from the extrusion mold unit 150 using the mandrel shaft 161, and the mandrel shaft 161 having a step difference so that the upper part has a wider diameter than the lower part. When the film resin is cured and guided along the outer circumferential surface of the , a cylindrical plastic bag may be blow molded by air discharged through the second air hole 162 formed through the central portion of the mandrel shaft 161 .

The blower 170 supplies air to the extrusion mold part 150 and the blow molding part 160 , and the blower 171 , the first air guide pipe 172 , the second air guide pipe 173 , etc. In addition, air may be supplied to the first air hole 154 of the extrusion mold unit 150 and the second air hole 162 of the blow molding unit 160 .

A heater wire (not shown) may be selectively installed as the first air guide tube 172 and the second air guide tube 173 applied to the present invention, and the first air guide tube 172 by the heater wire , the air moving into the second air guide tube 173 may maintain a temperature between 20-40 degrees.

Due to this temperature, it is possible to prevent damage due to rapid hardening of the extruded and molded resin, and to maintain uniform quality.

The transfer unit 180 transfers the molded plastic bag through the blow molding unit 160 using a plurality of transfer rollers. When the cylindrical plastic bag is molded, a plurality of rollers are positioned and arranged at the rear end thereof to a desired position. can be transported to

The plastic bag manufactured as described above can be widely used for industrial purposes (eg, packaging, waterproofing, etc.), agricultural (eg, warming and growth promotion of crops, etc.), daily life (eg, various bags), etc. and use information, manufacturing information, etc. may be printed on the surface according to the purpose.

In addition, the plastic bag manufacturing apparatus as described above performs conventional screw-type extrusion molding, and the screw rotation speed is set to a speed reduced by 10-30% based on the typical rotation speed of 1200-1300 rpm to make the film resin It can be adjusted to be extruded while maintaining a constant extrusion force through the outlet 155 .

In addition, of course, the plastic bag as described above may be mixed in a ratio of 0.1-5 wt% of a pigment for imparting color to 100 wt% of a high-density polyethylene raw material or a linear low-density polyethylene raw material.

In the above description, various embodiments of the present invention have been presented and described, but the present invention is not necessarily limited thereto. It will be readily appreciated that branch substitutions, transformations and alterations are possible.

110: first raw material supply unit 120: first melting unit
130: second raw material supply unit 140: second melting unit
150: extrusion mold part 160: blow molding part
170: blower 180: transfer unit

Claims (4)

Mixed with any one or more of high-density polyethylene (HDPE) and linear low-density polyethylene (LLDPE), which are new or regenerated recycled raw material resins, or the new or regenerated recycled raw material resin is high-density polyethylene (HDPE), linear low-density polyethylene (LLDPE) Any one of a first raw material supply unit to which any one of which is mixed with one or more and mixed with a biodegradable resin is supplied, and high-density polyethylene (HDPE) and linear low-density polyethylene (LLDPE), which are the new or regenerated recycled raw material resins Mixed with the above, or the new or regenerated recycled raw material resin is mixed with any one or more of high-density polyethylene (HDPE) and linear low-density polyethylene (LLDPE), and any one of the mixed biodegradable resin is melted into a resin 1 The melted part and the new or regenerated recycled raw material resin, high-density polyethylene (HDPE), linear low-density polyethylene (LLDPE), mixed with any one or more, or the new or regenerated recycled raw material resin is high-density polyethylene (HDPE), linear A second raw material supply unit that is mixed with any one or more of low-density polyethylene (LLDPE) and supplied with any one of a mixture of biodegradable resin, and the new or regenerated recycled raw material resin is high-density polyethylene (HDPE), linear low-density polyethylene (LLDPE) mixed with any one or more, or the new or regenerated recycled raw material resin is mixed with any one or more of high-density polyethylene (HDPE), linear low-density polyethylene (LLDPE), and a biodegradable resin mixed with any A second molten part for melting one into a resin, an extrusion mold part for extruding the resin transferred through the first molten part and the second molten part into a film resin, and a mandrel shaft for the film resin discharged from the extrusion mold part A blow molding unit for blow molding using a blow molding unit, a blowing unit for supplying air to the extrusion mold unit and the blow molding unit, and a conveying unit for conveying the plastic bag molded through the blow molding unit,
PLGA [Poly (lactide)-co-glycolide)] is applied to the biodegradable resin, and polymeric PLGA is obtained by copolymerizing lactide and glycolide in a 50:50 ratio. ,
The lactide was 410 g (4.55 mol) of lactic acid in a flask of 500 ml, 2 g (0.5 Wt%) of stannous oxide as a catalyst, and p-xylene as a solvent. ) was added, and then the temperature was maintained at 110°C-140°C while stirring at 900rpm to obtain water (H2O) as a by-product by azeotropic distillation for 5 hours, and the solvent P-xylene was removed, and the catalyst was Filter to remove stannous oxide), and add lactide and toluene to a 500 ml flask in a glove box to purify the produced monomer using recrystallization. Put it in a ratio of 1:3 and heat it to 70°C while stirring to completely dissolve the lactide, cool it slowly at room temperature to recrystallize it, and then remove toluene from the recrystallized lactide through vacuum drying. and repeating the purification process according to the recrystallization method 3 times to obtain colorless and transparent lactide,
Recrystallized lactide and glycolide are applied in an amount of 8:2 molar ratio, 1 g of stannous oxide as a catalyst and 80 ml of toluene as a solvent are added and stirred to raise the temperature to 140 ° C. Regenerated resin and biodegradable resin, characterized in that the solvent is removed by distillation to remove a small amount of moisture while maintaining, and heated and maintained at 160°C for 30 hours and stirred. plastic bag.
Mixed with any one or more of high-density polyethylene (HDPE) and linear low-density polyethylene (LLDPE), which are new or regenerated recycled raw material resins, or the new or regenerated recycled raw material resin is high-density polyethylene (HDPE), linear low-density polyethylene (LLDPE) Any one of a first raw material supply unit to which any one of which is mixed with one or more and mixed with a biodegradable resin is supplied, and high-density polyethylene (HDPE) and linear low-density polyethylene (LLDPE), which are the new or regenerated recycled raw material resins Mixed with the above, or the new or regenerated recycled raw material resin is mixed with any one or more of high-density polyethylene (HDPE) and linear low-density polyethylene (LLDPE), and any one of the mixed biodegradable resin is melted into a resin 1 The melted part and the new or regenerated recycled raw material resin, high-density polyethylene (HDPE), linear low-density polyethylene (LLDPE), mixed with any one or more, or the new or regenerated recycled raw material resin is high-density polyethylene (HDPE), linear A second raw material supply unit that is mixed with any one or more of low-density polyethylene (LLDPE) and supplied with any one of a mixture of biodegradable resin, and the new or regenerated recycled raw material resin is high-density polyethylene (HDPE), linear low-density polyethylene (LLDPE) mixed with any one or more, or the new or regenerated recycled raw material resin is mixed with any one or more of high-density polyethylene (HDPE), linear low-density polyethylene (LLDPE), and a biodegradable resin mixed with any A second molten part for melting one into a resin, an extrusion mold part for extruding the resin transferred through the first molten part and the second molten part into a film resin, and a mandrel shaft for the film resin discharged from the extrusion mold part A blow molding unit for blow molding using a blow molding unit, a blowing unit for supplying air to the extrusion mold unit and the blow molding unit, and a conveying unit for conveying the plastic bag molded through the blow molding unit,
PLGA [Poly (lactide)-co-glycolide)] is applied to the biodegradable resin, and polymeric PLGA is obtained by copolymerizing lactide and glycolide in a 50:50 ratio. ,
The lactide was 410 g (4.55 mol) of lactic acid in a flask of 500 ml, 2 g (0.5 Wt%) of stannous oxide as a catalyst, and p-xylene as a solvent ) was added, and then, while stirring at 900 rpm, the temperature was maintained at 110°C-140°C to obtain water (H2O) as a by-product by azeotropic distillation for 5 hours, and the solvent P-xylene) was removed, Filter to remove stannous oxide, a catalyst, and lactide and toluene in a 500 ml flask in a glove box to purify the produced monomer using recrystallization. was added in a ratio of 1:3 and heated to 70°C while stirring to completely dissolve the lactide, cooled slowly at room temperature to recrystallize, and the recrystallized lactide was dried to and repeating the purification process according to the recrystallization method 3 times to obtain colorless and transparent lactide,
Recrystallized lactide and glycolide are applied in an amount of 8:2 molar ratio, 1 g of stannous oxide as a catalyst and 80 ml of toluene as a solvent are added and stirred to raise the temperature to 140 ° C. A device for manufacturing a plastic bag using recycled resin and biodegradable resin, which is obtained by distilling to remove a small amount of moisture while maintaining it, removing the solvent P-Xylene, and heating and maintaining it at 160°C for 30 hours and stirring it. In
As the extrusion mold part, mixed with any one or more of high-density polyethylene (HDPE) and linear low-density polyethylene (LLDPE), which are new or regenerated recycled raw material resins, or the new or regenerated recycled raw material resin is high-density polyethylene (HDPE), linear low-density A third raw material supply unit to which any one of which is mixed with any one or more of polyethylene (LLDPE) and is mixed with a biodegradable resin is supplied;
Mixed with any one or more of high-density polyethylene (HDPE) and linear low-density polyethylene (LLDPE), the new or regenerated recycled raw material resin, or the new or regenerated recycled raw material resin is high-density polyethylene (HDPE), linear low-density polyethylene (LLDPE) An apparatus for manufacturing a plastic bag using a recycled resin and a biodegradable resin, characterized in that the intermediate surface is molded through a third melting part that is mixed with any one or more of the mixed biodegradable resin and melted any one of the mixed resin into the resin.
3. The method of claim 2,
The extrusion mold part includes a mold body provided with a blow die to have an extrusion groove thereon, an air hole penetrating from the outer circumferential surface of the mold body to the extrusion groove, and is formed in a circular shape on the upper portion of the mold body so that the film resin is a discharge port through which the discharge port is discharged, a first flow path extending from the lower center of the mold body to the upper side and divided at a first position to form an inner surface of the plastic bag and a first flow path connected to the discharge port; and a second flow path connected to the first flow path at a second position that extends and is divided around the first flow path, extends upward, and is spaced apart from the discharge port by a predetermined interval downward to form the outer surface of the plastic bag. A plastic bag manufacturing apparatus using a recycled resin and a biodegradable resin, characterized in that a plastic bag manufacturing apparatus is provided. delete

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