WO2012130110A1

WO2012130110A1 - Method for manufacturing packaging containers by using laminated packaging materials

Info

Publication number: WO2012130110A1
Application number: PCT/CN2012/072992
Authority: WO
Inventors: 黄志启
Original assignee: 叶万东; 刘华
Priority date: 2011-03-25
Filing date: 2012-03-25
Publication date: 2012-10-04

Abstract

A method for manufacturing packaging containers by using laminated packaging materials; the laminated packaging material comprises a thermoplastic material outermost layer (66), a paper substrate layer (65), a thermoplastic material innermost layer (61), and a first and second longitudinal lateral edge (21, 22) lapping each other to form a lapped portion of the container. The method comprises the following steps: a. extruding the thermoplastic material at an end of the first longitudinal lateral edge (21); b. pressing and cooling the thermoplastic material to form a strip and tightly adhering the strip to the end of the first longitudinal lateral edge (21); c. lapping the thermoplastic material outermost layer (66) of the first longitudinal lateral edge (21) and the strip at the lapping portion formed by the thermoplastic material innermost layer (61) of the second longitudinal lateral edge (22); d. heating the lapping portion to enable the thermoplastic material outermost layer (66) of the first longitudinal lateral edge (21), the strip, and the thermoplastic material innermost layer (61) of the second longitudinal lateral edge (22) to be adhesive; e. pressing the lapping portion to enable the thermoplastic material outermost layer (66) of the first longitudinal lateral edge (21) and the strip to adhere to the thermoplastic material innermost layer (61) of the second longitudinal lateral edge (22) to form a sealed lapped portion.

Description

Method for manufacturing packaging container from laminated packaging material

Technical field

The present invention relates to a method of making a packaging container, and more particularly to a method of making a packaging container from a laminated packaging material.

Background technique

In a packaging container manufacturing apparatus that stores a packaging container having a fluid food such as a liquid food such as milk or fruit juice, a roll-shaped packaging material manufactured by a packaging material manufacturing machine is provided in a roll state at an output portion of the filling machine. The packaging material is output from the output unit, and is conveyed in the filling machine in synchronization with the supply of the liquid food. The packaging material is composed of a paper substrate and a flexible laminate covered with a film of a polyethylene resin on both sides of the paper substrate, and an aluminum foil or a gas barrier resin may be formed between the paper substrate and the film as needed. The protective layer formed by the same. Further, after the packaging material is output from the output machine, it is sealed in a tubular shape in the longitudinal direction, and the liquid food is filled in the tubular packaging material, that is, the cylindrical packaging material, through the supply duct. However, when the packaging material is made into a cylindrical shape, the two edges of the packaging material form a step inside and outside the cylindrical packaging material, so that as the liquid food is filled into the cylindrical packaging material, the liquid food will form from the step. The end face of the packaging material penetrates into the packaging material, causing the quality of the packaging container to decrease.

The Chinese invention patent application specification CN101341073A discloses a manufacturing method of a packaging container, as shown in Fig. 1, in the figure, 11 is a roll-shaped packaging material, and the packaging material 11 is housed in a box in the state of the reel 31. In 32, the cartridge 32 is provided in an output portion of a filling machine (not shown). The above-mentioned packaging material 11 has a multilayer structure and has a paper base material, an innermost layer as a first layer formed by covering a resin film with the resin film, and an outermost layer as a second layer. Further, if necessary, a protective layer composed of a gas barrier resin and an aluminum foil may be formed between the paper substrate and the innermost layer. Printing for packaging is performed between the paper substrate and the outermost layer and on the outermost surface.

As the resin film for forming the innermost layer and the outermost layer, a thermoplastic resin, a thermosetting resin or the like can be used, and a thermoplastic resin such as polyolefin, polyamide or polyester is preferably used. Further, as the thermoplastic resin, polyolefins such as polyethylene, polypropylene, ethylene-propylene copolymer, and polybutene-1 are preferably used. Further, as the polyolefin, polyethylene is particularly preferable, and examples of the polyethylene include high density polyethylene, medium density polyethylene, low density polyethylene (LDPE), and linear low density polyethylene (LLDPE), and metallocene linear. Low density polyethylene (mLLDPE or MPE), etc., and particularly preferred are low density polyethylene and mLLDPE.

The packaging material 11 outputted from the output unit is intermittently conveyed by a conveying device (not shown) through the guide roller 34, and the take-up roller 35, the tension roller 36, the bending roller 37, and the like are sent to the printing unit 38, where the printing is performed. The unit 38, the date of manufacture of the packaging container 33, and the like are printed on the general display column of the packaging material 11. Then, the packaging material 11 on which the date of manufacture is printed is sent to a peelable tape applicator 39 as a sticking device, and the peelable tape applicator 39 is attached to the one of the packaging material 11 by the elongate peelable tape 12 On the side edge, it is temporarily positioned. The peelable tape applicator 39 includes a heater 14 as a heating member for heating the edge of the packaging material 11 before the peelable tape 12 is attached, and a pressing roller 15 as a pressing member for peeling the tape. 12 is pressed against the edge of the packaging material 11; and the guide rollers r1 and r2 as guide members are used to guide the peelable tape 12 output from the tape output device (not shown). Further, since the edge of the packaging material 11 is heated in advance, the pressure roller 15 can adhere the peelable tape 12 to the packaging material 11 by pressing the peelable tape 12 against the packaging material 11. Therefore, the pressing roller 15 functions as a bonding member.

The packaging material 11 to which the peelable tape 12 is attached is sent to the sterilization tank 42 via the

bending rolls

40 and 41, and the sterilization tank 42 is sterilized by a sterilizing liquid such as hydrogen peroxide. 43 is the bottom tray of the sterilization tank 42. Next, the packaging material 11 is sent to the air knife 45 by the calender roll 44, dried by the air knife 45, and then the movable forming ring 49 is moved by the upper forming ring 48, and the forming ring 50 and the lower forming ring 51 are divided so that The packaging material 11 is gradually formed into a tubular shape. During this period, the packaging material 11 is longitudinally sealed by the longitudinal sealing device 55 to form a cylindrical packaging material 13, and then the liquid food which is supplied by the supply pipe 52 as a milk, juice or the like is supplied. The inside of the cylindrical packaging material 13 is filled.

When the packaging material 11 is made into a tubular shape, the two edges of the packaging material 11 form a step inside and outside the cylindrical packaging material 13, and as the liquid food is filled into the cylindrical packaging material 13, the liquid food can form the above-mentioned steps. The end surface of the packaging material 11 penetrates into the packaging material 11, causing a deterioration in the quality of the packaging container. Here, the peelable tape 12 is pasted and permanently fixed across the steps, thereby preventing the end face of the packaging material 11 from coming into contact with the liquid food.

The cylindrical packaging material 13 filled with the liquid food is guided and conveyed by the cylindrical support ring 57, and is conveyed to the sealing and cutting device 61 as a transverse sealing device and a cutting device, and is held by the sealing and cutting device 61. The predetermined interval is laterally sealed and cut to form a pillow-shaped prototype container 23.

Next, the prototype container 23 is conveyed by the final forming conveyance device 58 and formed into a predetermined shape, and the above-described packaging container 33 accommodating a certain amount of liquid food is completed.

The inside of the packaging container 33 made by the above method is pasted and permanently fixed by the step formed by the peelable tape 12 across the two edges of the packaging material 11, but since the peelable tape 12 and the packaging material 11 are respectively produced by different production lines, After transporting to the production workshop of the fluid food, the peelable tape 12 is then pasted onto the packaging material 11 on the filling machine, as shown in FIG. 2, the mutually adhered surfaces of the peelable tape 12 and the

edges

21, 22 of the packaging material 11. There is often a risk of not completely sealing and sticking, and a triangular void 10 is formed at the step, and the liquid food enters the triangular space from the unsealed surface to penetrate into the paper substrate of the packaging material 11, the paper substrate The soaking softening affects the shape of the packaging container, and impurities in the paper substrate may enter the liquid food to contaminate the food and affect food safety.

technical problem

The technical problem to be solved by the present invention is to provide a method for manufacturing a packaging container from a laminated packaging material, without additionally providing a peelable tape, and ensuring that the overlapping portion of the packaging container forms a reliable seal so that the end of the edge of the step of the overlapping portion The paper substrate is neither immersed in liquid food nor contaminated with food, ensuring food safety and low production cost.

Technical solution

In order to solve the above technical problems, the present invention provides a method for manufacturing a packaging container from a laminated packaging material, which comprises an outermost layer of a thermoplastic material, a paper substrate layer, and an innermost layer of a thermoplastic material, which are formed by overlapping each other. The first and second longitudinal side edges of the lap joint of the packaging container, wherein:

A1, extruding a molten thermoplastic material at an end of the first longitudinal side edge of the laminated packaging material;

B1, extruding and cooling the molten thermoplastic material to form a strip, and sealing the strip to the end of the first longitudinal side edge;

C1 And overlapping the outermost layer of the thermoplastic material of the first longitudinal side edge and the strip on the overlapping portion formed by the innermost layer of the thermoplastic material of the second longitudinal side edge;

D1 Heating the lap such that the outermost layer of the thermoplastic material of the first longitudinal side edge, the strip, and the innermost layer of the thermoplastic material of the second longitudinal side edge are viscous;

E1, extrusion The lap portion is such that the outermost layer of the thermoplastic material of the first longitudinal side edge and the strip are adhered to the innermost layer of the thermoplastic material on the second longitudinal side edge to form a sealed lap.

In order to solve the above technical problems, the present invention also provides a method for manufacturing a packaging container from a laminated packaging material, which comprises an outermost layer of a thermoplastic material, a paper substrate layer, and an innermost layer of a thermoplastic material, which are overlapped with each other. Forming first and second longitudinal side edges of the lap joint of the packaging container, wherein:

A2 And lap the outermost layer of the thermoplastic material at the first longitudinal side edge of the laminated packaging material to the lap portion formed by the innermost layer of the thermoplastic material of the second longitudinal side edge;

B2 Heating the lap so that the outermost layer of the thermoplastic material of the first longitudinal side edge and the innermost layer of the thermoplastic material of the second longitudinal side edge are viscous;

C2 Squeezing the lap so that the outermost layer of the thermoplastic material of the first longitudinal side edge is sealed and adhered to the innermost layer of the thermoplastic material of the second longitudinal side edge;

D2, extruding a molten thermoplastic material at an end of the first longitudinal side edge;

E2, extruding and cooling the molten thermoplastic material to form a strip, the strip being sealed to the end of the first longitudinal side edge.

In order to solve the above technical problems, the present invention also provides a method for manufacturing a packaging container by using a multi-layer packaging material, which comprises an outermost layer of a thermoplastic material, a paper substrate layer, and an innermost layer of a thermoplastic material, which are overlapped with each other. Forming first and second longitudinal side edges of the lap joint of the packaging container, wherein:

A3 And the outermost layer of the thermoplastic material of the first longitudinal side edge of the multi-layer packaging material is overlapped on the overlapping portion formed by the innermost layer of the thermoplastic material of the second longitudinal side edge;

B3 Heating the lap so that the outermost layer of the thermoplastic material of the first longitudinal side edge and the innermost layer of the thermoplastic material of the second longitudinal side edge are viscous;

C3, extruding a molten thermoplastic material at an end of the first longitudinal side edge;

D3 Simultaneously pressing the lap and the molten thermoplastic material, and cooling the molten thermoplastic material to form a strip, and sealing the outermost layer of the thermoplastic material on the first longitudinal side edge to the innermost layer of the thermoplastic material on the second longitudinal side edge And sealing the strip to the end of the first longitudinal side edge to form a sealed lap.

Beneficial effect

The first method provided by the present invention, as compared to the prior art, extrudes and cools the molten thermoplastic material to form a strip by extruding a molten thermoplastic material at the end of the first longitudinal side edge of the laminated packaging material. And sealing the strip to the end of the first longitudinal side edge; ensuring that the end of the first longitudinal side edge is covered by the molten thermoplastic, and the lap joint of the packaging container forms a reliable seal after extrusion cooling The paper substrate at the end of the edge of the step is neither immersed in liquid food nor contaminated with food, which ensures food safety and low production cost.

The second and third methods provided by the present invention are compared with the prior art, since strips formed by extruding the molten thermoplastic material are respectively extended from the end portion to both sides and pasted in The innermost layers of the first and second longitudinal side edges of the thermoplastic material, Sealing the strip at the end of the first longitudinal side edge; ensuring that the end of the first longitudinal side edge is covered by the molten thermoplastic, and the lap joint of the packaging container forms a reliable seal after extrusion cooling, so that the lap portion The paper substrate at the end of the edge of the step is neither immersed in the liquid food nor contaminated with food, ensuring food safety and low production cost.

DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a simplified schematic view showing a conventional process for producing a packaging container from a laminated packaging material.

Fig. 2 is a schematic view showing a lap joint of a packaging container obtained by the manufacturing process illustrated in Fig. 1.

Figure 3 is a simplified schematic view of a process for making a packaging container from a laminated packaging material of the present invention.

Figure 4 is a schematic illustration of an embodiment of a lap joint of a packaged container produced using the method of the present invention.

Figure 5 is a schematic illustration of another embodiment of a lap joint of a packaged container produced using the method of the present invention.

Embodiments of the invention

As shown in Figures 2 and 4, the laminated packaging material used to make the packaging container typically includes a thermoplastic outermost layer 66, a paper substrate layer 65, a thermoplastic intermediate layer 64, a protective layer 63, and an adhesive layer 62 from the outside to the inside. The innermost layer 61 of the thermoplastic material.

The laminated packaging material has a first longitudinal side edge 21 and a second longitudinal side edge 22 that overlap each other to form a lap joint of the packaging container, the first longitudinal side edge 21 being the most in the process of forming the laminated packaging material into the packaging container The outer layer is lap bonded to the innermost layer of the second longitudinal side edge 22 to form a lap of the packaging container.

Figure 3 illustrates a method of making a packaging container from a laminated packaging material in accordance with the present invention. In contrast to Figure 1 of the prior art, the prior art step of attaching the peelable tape 12 is replaced by the following steps:

A1 Extruding the same molten thermoplastic material as the innermost layer 61 of thermoplastic material from the end of the innermost layer 61 of the first longitudinal side edge 21 by the extruder 14 at the end of the first longitudinal side edge 21, The shape of the extruded molten thermoplastic material is a flat column shape, and the thickness thereof is thicker than the end portion of the first longitudinal side edge 21, and the thickness is 1.1 to 3 times. It may also be a cylindrical shape or a square column shape as long as the first longitudinal side edge 21 can be reached. The end portion is completely sealed so that the adhesion of the molten thermoplastic to the innermost layer of the thermoplastic material is ensured.

Of course, the molten thermoplastic material can also be made of the same material as the innermost layer of the thermoplastic material. For example, when the innermost layer of the thermoplastic material is MLLDPE, the molten thermoplastic material can be selected from similar polyethylene materials such as LLDPE and LDPE, and can also be better. Paste effect.

B1 Pressing and cooling the molten thermoplastic material by roll pressing 15 to form a strip 25, sealing the strip to the end of the first longitudinal side edge 21, and extruding the strip of molten thermoplastic material from the strip 25 End direction The laminated packaging material extends in the central direction and is adhered to the innermost layer 61 of thermoplastic material, the outermost layer 66 of thermoplastic material of the first longitudinal side edge 21; The laminated packaging material extends in the middle direction and is pasted in step e1 On the innermost layer of the thermoplastic material of the second longitudinal side edge 22, the width of the innermost layer and the outermost layer of the thermoplastic material adhered to the first longitudinal side edge 21 of the strip 25 may be respectively 0.2-20 mm; In e1 The portion of the innermost layer of the thermoplastic material adhered to the second longitudinal side edge may have a width of 0.2 to 20 mm.

C1 After a series of preforming, the strip or sheet of packaging material is formed into a cylindrical shape such that the outermost layer of thermoplastic material of the first longitudinal side edge 21 and the strip 25 overlap the second longitudinal side edge 22 a lap joint formed by the innermost layer of the thermoplastic material;

D1 Heating the lap so that the outermost layer of the thermoplastic material at the first longitudinal side edge, the strip, and the innermost layer of the thermoplastic material at the second longitudinal side edge are viscous, and the heating method may be hot air heating or high frequency heating. The way.

E1 Pressing the lap portion by roll pressing, so that the outermost layer of the thermoplastic material of the first longitudinal side edge 21 and the strip 25 are adhered to the innermost layer of the thermoplastic material of the second longitudinal side edge 22 to form a sealed overlap. unit.

The packaging container is then formed through a series of well known filling and forming steps.

After the above steps, the lap portion of the packaging container is formed into a structure as shown in Fig. 4, the end of the first longitudinal side edge 21 is tightly sealed by the strip 25, and the strip also extends toward the first and second longitudinal side edges. It is adhered tightly to the innermost layer 61 of the thermoplastic, further ensuring that the ends of the first longitudinal side edges 21 are tightly sealed from contact with the food in the container.

Another embodiment in which the packaging container lap is formed after the above steps, the end of the first longitudinal side edge 21 is tightly sealed by the strip 25 and the strip is thermoplastic to the first longitudinal side edge 21, as shown in FIG. The innermost layer 61 of plastic, the outermost layer 66 of thermoplastic, tightly seals the end of the first longitudinal side edge 21, which strip also extends toward the innermost layer of the thermoplastic of the second longitudinal side edge 22 and is closely adhered to the most thermoplastic On the inner layer, it is further ensured that the ends of the first longitudinal side edges 21 are tightly sealed from contact with the food in the container.

The present invention also provides a method of manufacturing a packaging container from a laminated packaging material, as shown in Fig. 4, which is different from the prior art Fig. 1 in that the conventional step of attaching the peelable tape 12 is omitted. After the lap joint is formed, the molten thermoplastic is pressed to close the end of the first longitudinal side edge 21, and the steps are as follows:

A2 Laminating the outermost layer 66 of the thermoplastic material of the first longitudinal side edge 21 of the laminated packaging material over the overlap formed by the innermost layer 61 of the thermoplastic material of the second longitudinal side edge 22;

B2 Heating the lap so that the thermoplastic outermost layer 66 of the first longitudinal side edge 21 and the innermost layer 61 of the second longitudinal side edge 22 have a viscosity;

C2 Pressing the lap portion by roll pressing, so that the outermost layer of the thermoplastic material of the first longitudinal side edge 21 is sealed and adhered to the innermost layer of the thermoplastic material of the second longitudinal side edge 22;

D2 The molten thermoplastic material which is the same as the innermost layer of the thermoplastic material is extruded from the innermost side of the first longitudinal side edge 21 on the end of the first longitudinal side edge 21 by extrusion, and is extruded and melted. The shape of the thermoplastic material is a flat column shape, and the thickness thereof is thicker than the end portion of the first longitudinal side edge 21, and the thickness is 1.1 to 3 times. It may also be a cylindrical shape or a square column shape as long as the end portion of the first longitudinal side edge 21 can be reached. The effect of a complete seal is sufficient to ensure adhesion of the molten thermoplastic to the innermost layer of the thermoplastic.

E2 Pressing and cooling the molten thermoplastic material by roll pressing to form a strip 25, sealing the strip to the end of the first longitudinal side edge 21, and extruding the strip of molten thermoplastic material from the end Department direction The laminated packaging material extends in the central direction and is adhered to the innermost layer of the thermoplastic material of the first longitudinal side edge 21; while extending away from the central portion of the laminated packaging material and pasted in On the innermost layer of the thermoplastic material of the second longitudinal side edge 22, the innermost portion of the thermoplastic material adhered to the first longitudinal side edge 21 of the strip 25 may have a width of 0.2-20 mm; The width of the portion of the innermost layer of the thermoplastic material of the second longitudinal side edge may be from 0.2 to 20 mm.

Of course, the above steps a2 and b2 can be interchanged according to the needs of actual production.

After the above steps, the lap portion of the packaging container is formed into a structure as shown in Fig. 4, the end of the first longitudinal side edge 21 is tightly sealed by the strip 25, and the strip also extends toward the first and second longitudinal side edges. It is adhered tightly to the innermost layer of the thermoplastic, further ensuring that the ends of the first longitudinal side edges 21 are tightly sealed from contact with the food in the container.

A3 And overlapping the outermost layer 66 of the thermoplastic material of the first longitudinal side edge 21 of the multilayer packaging material with the overlapping portion formed by the innermost layer 61 of the thermoplastic material of the second longitudinal side edge 22;

B3 Heating the lap so that the thermoplastic outermost layer 66 of the first longitudinal side edge 21 and the innermost layer 61 of the second longitudinal side edge 22 have a viscosity;

C3 The molten thermoplastic material which is the same as the innermost layer of the thermoplastic material is extruded from the innermost side of the first longitudinal side edge 21 on the end of the first longitudinal side edge 21 by extrusion, and is extruded and melted. The shape of the thermoplastic material is a flat column shape, and the thickness thereof is thicker than the end portion of the first longitudinal side edge 21, and the thickness is 1.1 to 3 times. It may also be a cylindrical shape or a square column shape as long as the end portion of the first longitudinal side edge 21 can be reached. The effect of a complete seal is sufficient to ensure adhesion of the molten thermoplastic to the innermost layer of the thermoplastic.

D3 Simultaneously pressing the lap and the molten thermoplastic material such that the outermost layer of the thermoplastic material of the first longitudinal side edge 21 is sealingly adhered to the innermost layer of the thermoplastic material of the second longitudinal side edge 22; and while being extruded Cooling the molten thermoplastic material to form a strip 25, sealing the strip to the end of the first longitudinal side edge 21, and extruding the strip of molten thermoplastic material from the end toward the strip The central packaging direction of the multilayer packaging material extends and adheres to the innermost layer of the thermoplastic material of the first longitudinal side edge 21; while extending away from the central portion of the multilayer packaging material and pasting On the innermost layer of the thermoplastic material of the second longitudinal side edge 22, the innermost portion of the thermoplastic material adhered to the first longitudinal side edge 21 of the strip 25 may have a width of 0.2-20 mm; The width of the portion of the innermost layer of the thermoplastic material of the second longitudinal side edge may be from 0.2 to 20 mm.

Of course, the above steps a3 and b3 can be interchanged according to the needs of actual production.

The laminated packaging material for manufacturing the packaging container by the above method may be a wide-band type in which a plurality of packaging units are continuously connected end to end as shown in FIGS. 1 and 3, or may be a sheet shape of a single packaging unit, and the difference is that the previous one is There are differences in the feeding and post-filling steps, and these steps are well known to those skilled in the art.

Claims

1. A method of manufacturing a packaging container from a laminated packaging material, the laminated packaging material comprising an outermost layer of a thermoplastic material, a paper substrate layer, an innermost layer of a thermoplastic material, and a first layer having overlapping portions of the packaging container to form a packaging container a second longitudinal side edge characterized by:

2. A method of manufacturing a packaging container from a laminated packaging material according to claim 1, wherein in said step a1, said molten thermoplastic material is squeezed from the innermost side of the thermoplastic material of said laminated packaging material. Exit to the end of the first longitudinal side edge.

3. A method of manufacturing a packaging container from a laminated packaging material according to claim 1, wherein in said step b1, said molten thermoplastic material is extruded from said end to said strip The laminated packaging material extends in the central direction and is adhered to the innermost layer of thermoplastic material on the first longitudinal side edge and/or to the outermost layer of thermoplastic material.

4. The method of manufacturing a packaging container from a laminated packaging material according to claim 3, wherein in said step b1, said molten thermoplastic material is moved away The laminated packaging material extends in the middle direction and is adhered to the innermost layer of the thermoplastic material on the second longitudinal side edge in step e1.

5. A method of manufacturing a packaging container from a laminated packaging material, the laminated packaging material comprising an outermost layer of a thermoplastic material, a paper substrate layer, an innermost layer of a thermoplastic material, and a first layer having overlapping portions of the packaging container to form a packaging container a second longitudinal side edge characterized by:

6. A method of manufacturing a packaging container from a laminated packaging material according to claim 5, wherein in said step d2, said extrusion laminated thermoplastic material is the same as the innermost layer of said thermoplastic material or Similar materials.

7. A method of manufacturing a packaging container from a laminated packaging material according to claim 5, wherein in said step e2, said molten thermoplastic material is extruded into strips from said end to said sides, respectively Extend and paste in the direction The first and second longitudinal side edges of the thermoplastic material are on the innermost layer.

The method of manufacturing a packaging container from a laminated packaging material according to any one of claims 5 to 7, wherein: The step a2 and the step b2 are interchanged.

9. A method for manufacturing a packaging container from a multi-layer packaging material, the multi-layer packaging material comprising an outermost layer of a thermoplastic material, a paper substrate layer, and an innermost layer of a thermoplastic material, having a first portion overlapping each other to form a lap joint of the packaging container a second longitudinal side edge characterized by:

10. A method of manufacturing a packaging container from a multi-layer packaging material according to claim 9, wherein in said step c3, said extrusion-laminated thermoplastic material is the same as the innermost layer of said thermoplastic material or Similar materials.

11. A method of manufacturing a packaging container from a multi-layer packaging material according to claim 9, wherein in said step d3, said molten thermoplastic material is extruded into strips from said end to said sides, respectively Extend and paste in the direction The first and second longitudinal side edges of the thermoplastic material are on the innermost layer.

The method of manufacturing a packaging container from a multi-layer packaging material according to any one of claims 9 to 11, wherein: The step a3 and the step b3 are interchanged.