KR100909791B1 - Double bag and its manufacturing method - Google Patents

Abstract

The present invention relates to a double canister bag and to the Phiven laminated outer shell and the barrel film at the same time to be molded together to have a perfect sealed structure and there is no fear of the breaking of a double configuration of a double bag and easy to manufacture method will be.

In accordance with the present invention, the outer shell and the inner shell of the top of the bag is bonded with a hot melt and the bottom is combined with the end of the end and the end of the outer shell are combined, but when the contents are filled, the double barrel bag is separated by tearing apart the combined do.

Phi Phi Woven Laminate, Feed Bag

Description

Dual Ply Bag and Method for Preparing the Same

1 is a plan view of the present invention double-bag bag.

Figure 2 is an exploded perspective view of the present invention double bag.

3 is a schematic view of the present invention umbilical cord.

<Description of the symbols for the main parts of the drawings>

20: present invention fabric fabric 21: hot melt adhesive portion

22: film end 23: woven laminated end

24: seam 25: sealing line

26: back bonding part 29: M-type fold line

41: sewing part 100: umbilical cord

103: printing machine 106: up and down adjustment screw

107: M molding unit 108: Extruder

109: cutting machine 114: hot melt sprayer

A: Woven paper B: Film roll

C: Tong Film

The present invention relates to a double bag. More specifically, the present invention relates to a double-cylinder bag and a method of manufacturing the same, having a perfect sealing structure and simultaneously avoiding rupture by putting PPI woven paper and a barrel film together and molding them together.

In general, fish feed bags and chemical goods bags are covered with polypropylene woven or woven paper with kraft paper to prevent moisture, oil leakage and damage. I have been using the double bagged inside. Conventionally, the method of manufacturing a double feed bag is prepared by putting a plastic bag in a woven paper bag and attaching a double-sided tape to the upper side one by one, or by applying an adhesive in a stripe shape to a kraft paper and attaching a polyethylene film to the fabric. Both ends of the film by folding the fabric has been produced in the form of finishing the sewing of the upper and lower by attaching the woven laminated paper between the films (Registration Utility Model No. 253786).

However, the method of manufacturing the bag by attaching double-sided tape is all done by hand. Therefore, the productivity is lowered and the manufacturing cost is increased. Therefore, the whole film used as the endothelial is folded. Problems such as under-content occuring when filling, and above all, there is a problem that the M-shaped bag is difficult to form the M-shaped bag is difficult to form the M-shaped bag. A simple bag, represented by a trash bag, is likely to have an air pocket between the woven paper and the tong film, so there is a high risk of rupture, and it is difficult to stack several bags. In addition, in the case of a stripe bag, since the bag manufacturing process is a consistent process by mechanical work, the productivity is high, but there is a problem that a lot of bags are thrown when thrown together because the inner and outer skins are stuck together.

Accordingly, the present inventors have developed a method capable of manufacturing the M-type double bag of a new configuration in an automated and consistent process to complete the present invention.

It is an object of the present invention to provide a double-shell bag of a new structure in which the outer shell and the inner shell are molded together in an M shape.

Another object of the present invention is to provide a double barrel bag for fish feed and chemicals that is easy to load the contents into the bag, there is no fear of moisture permeation and oil leakage.

Yet another object of the present invention is to provide a manufacturing method capable of producing a large amount of inexpensive and durable double barrel bag with a new automation technology.

The present invention relates to a double cell bag consisting of woven paper and polyethylene barrel film. The present invention also relates to a method for producing an M-type double bag. According to the present invention, the upper end portion (inlet portion of the double bag) of the drawing shown in FIG. 1 is adhered to the outer shell (A) and the endothelial (B) by hot melt 21, and the lower portion (bottom portion of the double bag) The inner end of the inner tube film and the outer portion of the outer woven paper is sewn together, and before the sewing, the whole film is formed with a sealing line 25 formed by overlapping the lower parts with a heat sealing, and then the lower end of the tube film and the outer skin. The woven paper lower end portion is sewn together to form a seam line 24. When the contents are filled, the combined barrel film bottom seam 24 is torn (see the enlarged view shown in FIG. 1), thereby providing a double bag that separates the inner and outer skin bonds. In the present invention, the bag is filled with the inner portion of the inner film is filled with the outer sheath before the contents are filled, but when the contents are filled in the bag, the lower portion of the film is inflated and sewn under the sealing line 25. The tip (which had been cut off by the needle hole) will tear off. When the inner skin end is coupled to the outer skin by sewing during the filling operation, the tip of the film is not folded or overlapped, so the filling operation is easy and there is no fear of defective product under-content. In addition, if the sewing portion at the bottom of the barrel film is torn by the contents filling operation, and the endothelial and the outer skin are separated, the separated inner skin and the outer skin absorb double impact even when throwing or rough handling when loading or shipping. This is drastically reduced.

The woven paper used for the double cell bag of the present invention is a woven paper made by bonding (laminating) kraft paper to PPI, and a low density polyethylene barrel film is used as the film. In the case of the bag filled with the contents, if the inner and outer shells are separated, the impact film is absorbed primarily by a good elongation rate even when subjected to an external shock, and secondly, the high-strength woven paper is supplemented to prevent the bag. In the case of a conventional double bag that is attached (sewn) with the inner skin and the outer skin, the inner skin is easily ruptured due to the difference in the elongation rate between the outer skin and the inner skin, and moisture and oil pass through, causing a defective product. In particular, oil-rich feeds and chemicals are susceptible to deterioration due to moisture absorption or oil spills.

In order to manufacture the double bag of the present invention, a modified apparatus is installed by attaching an M-type molding unit composed of a hot melt sprayer, a sensor, an air injector and a plate roller to a known umbilical cord. Hot melt injector is a device that injects melt glue to bond the woven and tum film on the top of the bag. The hot melt detection sensor is needed to accurately detect the hot melt spraying position. The marking is performed at the sensing position, and the hot melt sprayer detects the marking and sprays the adhesive.

Hereinafter, the present invention will be described in detail with reference to Examples. This embodiment is an embodiment for helping the understanding of the present invention, and the scope of the present invention is not limited to this embodiment.

EXAMPLE

1 is a cutaway plan view of the present invention double bag;

The upper end of the fabric bag 20 of the present invention, the hot melt adhesive portion 21 is combined with the inner skin (film) and the outer shell (woven paper), the lower end is the film end portion 22 and the woven end portion 23, the sealing line 25 and seam (24), the right side of the fabric fabric (20) is composed of the back adhesive portion 26, the left side is composed of a woven margin (27) and the outer skin end portion 28, the M-type fold line 29 is indicated on both sides of the center It is. The hatched portion of the back adhesive portion 26 is the right end portion of the woven paper when the bag is folded along the M-type fold line 29 to the back portion of the left side portion of the bag, that is, the woven margin 27 and the epidermal paper end 28. do.

In the present invention, the bonding of the woven paper is made by melting a polypropylene resin (trade name: Samsung LH-520S, Honam Petrochemical L-270A) using an applicator nozzle and applying it to one end of the woven paper and the woven margin part of the other end. Bond back.

2 is an exploded perspective view of the present invention sewing type double bag,

Sewing portion 41 is coupled to the top and bottom of the bag fabric 20, the lower sewing portion 41 is in the final finishing process when manufacturing the bag, the upper sewing portion is to be sewn after filling the contents. The final finishing process is a sewing section 41 process that seals the bottom opening of the bag. The sewing portion 41 is finished by sewing the cotton tape 44 with the creep tape 42 and the filacoat 43 at the bag opening end.

3 is a schematic view of the present invention umbilical cord,

A hoist 101 for moving the woven paper roll R is provided, and a printing machine 103 for displaying printing and hot melt injection detection marks on the bag cover is provided on the ground. The left side of the printing machine is provided with a woven paper roll stand 102, which is an unwinder, and a full film roll stand 104 is provided on the left side thereof. The whole film roll stand 104 is connected with the press roller 112 through the electronic position controller 105 which holds the position of the whole film. Next, the press roller 112 is provided with a guide roller 113 in which the tube film C and the woven paper A are combined, and are then connected to the M-shaped molding unit 107. The M-shaped molding unit 107 is connected to the extruder 108. The extruder 108 is provided with a drawing roller 117 composed of a rubber coating roller (upper) and a steel roller (lower), and a cutting machine 109 is connected to the drawing roller 117. Subsequently, the conveyor 110 is provided. The hot melt injector 114 and the detection sensor 115 are respectively installed above and below the woven lamination guide roller 111. The polypropylene adhesive application device 116 used for woven lamination back bonding is provided between the M-type molding unit 107 and the guide roller 113. Unexplained reference numerals at the top of the guide roller 113 is a vertical adjustment screw 106 for adjusting the height of the M-shaped molding unit, and reference numeral 118 is a drive connecting gear.

The woven paper A released from the woven paper roll stand 102 goes to the printing machine 103 and is printed, and then passes through the woven paper guide roller 111 and is subjected to the hot melt injector 114 according to the instruction of the sensor 115. It is combined with the hot-melt applied and foamed tube film (C). The through-film C released from the film roll B installed in the film stand 104 passes through the press roller 112 through the electronic position controller 105 and is formed into air to move to the guide roller 113. The hot melt coated woven paper and the whole film are passed through the guide roller 113, and the upper end is hot melt bonded and merged to proceed to the M-shaped molding unit 107. Before entering the M-shaped molding unit 107, one side of the woven paper is formed. A polypropylene resin adhesive is applied by the applicator 116, and the woven margin part of the other end is double-bonded, and the bag is made. The double bag is made in the M-shaped molding unit 107 is formed on both sides of the bag in the M-shaped and passed through the take-out roller 117 to the cutter 109, the cutter 109 is cut to the desired size The bag is moved through a conveyor 110 system to a known heat sealing device (not shown) and a sewing device (not shown) to seal the bottom of the barrel and then the bottom of the bag is sewn.

The M-type molding unit 107 is composed of five roller sets each having ten plate rollers on both sides of the bag and two plate rollers paired up and down inside each other. The roller set has a lower bearing supported by an outer bracket roller. Both sides of the bag are formed between the lower outer bearing roller and the lower roller bearing while being molded in an M shape by the ten outer dish rollers and the twenty inner dish rollers. The tong film (C) is filled with air immediately passing through the press roller 112 and the upper and lower films are separated into a cylindrical shape, the operation of blowing the air as soon as the film passes the press roller 112, the film After injecting air into an air gun connected to a compressor (not shown) by drilling a hole in one side, the hole is closed using an adhesive tape (OPP Tape). Air injection is performed manually, and if the air is injected only once when the film roll (B) is mounted at the start of the process or when the film roll (B) is replaced, the forming state is maintained until all the film rolls are exhausted. do. Pressing roller 112, the starting point of forming operation, and withdrawal roller 117, in which the M-type forming operation is finished, presses the bag with a pressure of 7 kg or more from the top and the bottom, so when air does not leak, You will be able to maintain it as it is.

The double cell bag manufacturing process according to the present invention is carried out according to the following consistent process.

(A) the process of unwinding the woven paper and polyethylene roll film in the unwinder device and performing the hot melt spraying position marking at the same time as the label printing on the woven paper, and injecting air into the roll film to make a whole film;

(B) sensing the printed mark by a sensor and performing hot melt spraying on top of the woven paper;

(C) The hot melt sprayed woven paper and the air injection barrel film is put into the guide rollers to be combined into a double bag made of the woven paper shell and the barrel film, but by applying an adhesive on one side of the woven paper Bonding the other end back;

(D) forming the M-shaped both sides of the double bag by passing the double adhesive bag through the M-shaped molding unit;

(E) sending the double-cylinder bag of which the molding is completed to an extruder and passing the draw roller consisting of a rubber coating roller (upper) and a steel roller (lower) to fix the adhesive;

(F) the process of cutting the double bag is fixed to the adhesive bag, the double bag is cut by moving to a heat sealing device to finish the heat sealing by overlapping both ends of the bottom of the film film with each other, then sewing the bottom of the double bag Is done.

In the present invention, the double bag is important to arrange the sealing line and the seam line at the bottom of the film. The cut double canister is usually formed 7 mm shorter than the woven paper due to the difference in elongation between the woven paper and the film. For example, if the seam is formed 12 mm from the end of the double canister (when sewing), At the end of the film, it is missed 5 mm away, and this part is torn apart during the filling of the contents and separated from the woven paper. That is, when the contents are filled, the whole film and the woven paper are separated to allow double absorption of the impact. The main feature of the present invention is that the film ends only slightly bite to the seam so that the film is torn off when the contents are filled.

Another feature of the present invention is that it is possible to manufacture the M-shaped double-celled bag in a serial process on the umbilical cord while using the barrel film as the endothelium. Conventional M-shaped double bag is manufactured by first forming a woven bag into an M-shape, and then manually inserting a plastic bag into it, or making a fabric by attaching a woven paper and a synthetic film, and molding the fabric into an M-shaped film. As a silver film, woven paper has been double-bonded to woven paper to produce a double bag. In the former case, there is a problem that the plastic bag is folded in, and in the latter case, the adhered portion of the film is likely to be torn off by impact, and there is a high possibility of defective products. As the synthetic resin film, a high density polyethylene (HDPE) film or a low density polyethylene (LDPE) film was used, and a thickness of 50 to 180 μm was used. The woven paper and the whole film adhesion of the top of the double bag were carried out by a hot melt adhesive method. As a hot melt adhesive agent, it adhere | attached in 180-220 degreeC using the ethylene vinyl acetate (EVA) resin adhesive (trade name: EZ-70254, National Starch). This is a temperature range that matches the melting temperature of the polypropylene, is sufficient to achieve the desired adhesion, and helps to prevent premature curing of the adhesive seasonally.

Thus, the yield ratio and productivity of the double barrel bag for fish feed prepared as described in Table 1 below. The wave rate was written by examining the wave rate generated by performing two times each at a right angle, side drop, and flat drop at a height of 4 meters. The productivity is based on the conventional production by the manual process and the production by the integrated process of the present invention per person per day. Investigations were made on a production basis.

Classification (bag type) Breakthrough rate (%) Productivity (four / day, person) Remarks Conventional manual double bag 0.10 250-300 20㎏ bag standard The present invention double bag 0.04 50,000 20㎏ bag standard

As described above, the double bag of the present invention is carried out in a uniform process in the umbilical cord, the manual process is omitted, foreign matter insertion is suppressed, there is no fear of contamination, the productivity of 300 bags / person to 50,000 bags / person per day Improved by 150 times In addition, according to the present invention, the method for manufacturing a double cell bag is capable of molding the endothelium and the outer shell together in an M-shape through a uniform process on the umbilical cord, and since the outer shell and the endothelium are integrated, a stable contents filling is possible without folding the film inside. . In addition, the present invention, the double cell bag has almost no generation of the bag, the waterproof effect is excellent, there is no moisture absorption or leakage even if stored for a long time, the contents do not deteriorate.

Claims (6)

(A) the process of unwinding the woven paper and polyethylene roll film in the unwinder device and performing the hot melt spraying position marking at the same time as the label printing on the woven paper, and injecting air into the roll film to make a whole film; (B) sensing the printed mark by a sensor and performing hot melt spraying on top of the woven paper; (C) The hot melt sprayed woven paper and the air injection barrel film is put into the guide rollers to be combined into a double bag made of the woven paper shell and the barrel film, but by applying an adhesive on one side of the woven paper Bonding the other end back; (D) forming the M-shaped both sides of the double bag by passing the double adhesive bag through the M-shaped molding unit; (E) sending the double-cylinder bag of which the molding is completed to an extruder and passing the draw roller consisting of a rubber coating roller (upper) and a steel roller (lower) to fix the adhesive; (F) the process of cutting the double bag is fixed to the adhesive bag, the double bag is cut by moving to a heat sealing device to finish the heat sealing by overlapping both ends of the bottom of the film film with each other, then sewing the bottom of the double bag Method of manufacturing a double barrel bag. The method of claim 1, wherein the (bar) sewing process is characterized in that the bottom of the barrel film is shorter than the woven paper to combine and sew together so that the bottom of the barrel film is separated from the sewing portion when filling the contents in the double bag. The manufacturing method of the double bag. delete delete delete delete

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