KR100532360B1 - Production method of zipper bag having easily tearable structure - Google Patents

Abstract

The present invention relates to a method for manufacturing a zipper bag having an easy cut structure, and more particularly, iii) a first and a second opposing surface having a laminated structure in which a plurality of polyolefin synthetic resin sheets and protective sheets are laminated, respectively. Continuously feeding the provided soft film to the zipper bag maker; ii) separating and separating the first and second opposing surfaces of the soft film from a falling unit; Positioning a retractable zipper having a track having an arm profile on one side and a track having a male profile corresponding to the opposite side at a predetermined position, i) a relatively thick rear and a relatively thin thin section, respectively; Positioning first and second strips comprising: adjacent to an upper end of the track and extending above the distal end of the opposing surface, iii) the rear and thin sections Pressing using a mold including a projection surface corresponding to the shape and size and heat-sealed the zipper and the strip at the temperature of 100 ℃ to 200 ℃ for a few seconds, the edge portion of the opposite surface excluding the opening 100 Heat-sealing and cooling each other for several seconds at a temperature of from 200 ° C. to 200 ° C., iii) forming a notch along the boundaries of the rear and thin portions, and iii) into individual packaging containers along the heat-sealed edges. By providing a method for manufacturing a zipper bag having an easy incision structure comprising a step of cutting, it is easy to transfer the shear force applied when opening the packaging container as intended without deformation of the boundary of the rear portion and thin portion during thermal fusion It is possible to manufacture a zipper bag that can be easily cut and reliable.

Description

Production method of zipper bag having easy incision structure {PRODUCTION METHOD OF ZIPPER BAG HAVING EASILY TEARABLE STRUCTURE}

The present invention relates to a method for manufacturing a zipper bag having an easy cut structure, and more particularly, iii) a first and a second opposing surface having a laminated structure in which a plurality of polyolefin synthetic resin sheets and protective sheets are laminated, respectively. Continuously feeding the provided soft film to the zipper bag maker; ii) separating and separating the first and second opposing surfaces of the soft film from a falling unit; Positioning a retractable zipper having a track having an arm profile on one side and a track having a male profile corresponding to the opposite side at a predetermined position, i) a relatively thick rear and a relatively thin thin section, respectively; Positioning first and second strips comprising: adjacent to an upper end of the track and extending above the distal end of the opposing surface, iii) the rear and thin sections Pressing using a mold including a projection surface corresponding to the shape and size and heat-sealed the zipper and the strip at the temperature of 100 ℃ to 200 ℃ for a few seconds, the edge portion of the opposite surface excluding the opening 100 Heat-sealing and cooling each other for several seconds at a temperature of from 200 ° C. to 200 ° C., iii) forming a notch along the boundaries of the rear and thin portions, and iii) into individual packaging containers along the heat-sealed edges. It relates to a method for manufacturing a zipper bag having an easy cut structure comprising the step of cutting.

In general, containers made of plastic materials such as confectionery bags, food bags, and liquid detergent containers for refilling had to be stored in sealed containers to preserve their contents after opening. In recent years, a container has been developed in which a zipper is built into the openings of these plastic containers so that the container can be stored for a relatively long time even after opening.

Korean Utility Model Publication No. 20-0309763 discloses a packaging container in which a lower end portion is designed in a “W” shape, and a cut line is attached to the sealing portion of the upper end and a zipper made of PVC material under the cut line. However, the zipper bag of the above-described type is generally the same as the material of the body of the container, so when cutting by hand without using a cutting means such as scissors, the cutting is rather difficult and the direction of the cutting is not as intended. If the incision is directed upward, the incision cannot be made to the end, and if the incision is downward, the incision can no longer proceed at the junction of the zipper, or the zipper is released from the packaging and no longer achieves the purpose of the sealed container. There are many cases in which problems such as becoming impossible occur.

Further, Japanese Patent Laid-Open Publication No. 2000-0029953 discloses a packaging container having a means for preventing a customer from being opened unsealed before opening the container. In the packaging container having the above structure, the above-mentioned problems do not occur, but the zipper is not embedded in the container, but is exposed to the outside, so that the airtightness is not good and the reliability of the container is low.

Applicant has applied for a utility model registration by developing a zipper bag having an easy cutting structure that can be easily cut when opening the bag and has a high reliability in order to solve the problems of the existing zipper bags. See application 2003-0016535).

The zipper bag is manufactured by extrusion molding a cylindrical film having a female profile and a male profile of a zipper integrally, and manufacturing the zipper in advance and attaching it to a packaging container by heat fusion. There is a method, and it is common to manufacture a zipper bag by the latter method for reasons such as inconvenience in handling.

However, in the case of sealing the packaging container by the heat fusion method, when the heat fusion temperature is higher than the melting temperature of the synthetic resin which is the material of the sheet and the zipper and the strip to be fused, the shape of the zipper or the strip is changed to the original shape before the heat fusion. It may be difficult to maintain the incision easily, on the contrary, when the thermal fusion temperature is lower than the melting temperature of the synthetic resin, there is a problem in that the fusion is not proper and the airtightness of the packaging container may be lowered, thereby lowering the reliability of the zipper bag.

Therefore, the technical problem to be achieved by the present invention, in the manufacture of a zipper bag, by performing heat fusion by using a mold having a projection surface corresponding to the shape and size of the rear portion and thin portion of the strip heat-sealed at the end of the opening, It is to provide a method for manufacturing a zipper bag that can be easily cut and reliable by being able to transfer the shear force applied when opening the packaging container as intended without deformation of the boundary between the rear portion and thin portion during thermal fusion.

In order to achieve the above technical problem, the present invention provides a flexible film having a first and a second opposing surface having a laminated structure in which a plurality of polyolefin synthetic resin sheets and a protective sheet are laminated. Injecting, ii) separating and separating the first opposing surface and the second opposing surface of the flexible film from a falling unit, and iii) a track having an arm profile on one side of the opposing surface, and the opposite side. Positioning a retractable zipper having a track having a water profile corresponding to the side in a predetermined position, i) a first and second strip comprising a relatively thick rear portion and a relatively thin thin portion, respectively; Positioning adjacent to the upper end of the track and extending over the distal end of the opposing face, i) protruding face corresponding to the shape and size of the rear and thin parts; Pressing by using a mold containing the zipper and the strip is heat-sealed to the opposite surface for several seconds at a temperature of 100 ℃ to 200 ℃, the edge of the opposite surface excluding the opening for several seconds at a temperature of 100 ℃ to 200 ℃ Easy heat dissipation and cooling; iii) forming a notch along the boundary of the rear and thin portions, and iii) cutting into individual packaging containers along the heat-sealed rim. Provided is a method of manufacturing a zipper bag having a structure.

In addition, the present invention provides a method for producing a zipper bag having an easy cut structure, characterized in that the material of at least one of the polyolefin synthetic resin sheet, zipper and strip is low density polyethylene (LDPE) or polypropylene (PP).

In addition, the present invention provides a method for producing a zipper bag having an easy incision structure, characterized in that the steps iii) and iii) are performed simultaneously.

In addition, the present invention comprises the steps of continuously feeding a flexible film having a first and a second opposing surface of a laminated structure in which a plurality of polyolefin synthetic resin sheets and protective sheets are laminated, respectively, ii) Separating and separating the first facing surface and the second facing surface of the flexible film from a falling unit, i) a side profile having a female profile on one side of the facing surface and a water profile corresponding to the opposite side; And an openable retractable zipper integrally extruded to have a first and second strips having a track having a relatively thick rear portion and a relatively thin thin portion, respectively, on top of said track. Positioning to extend over the distal end, iii) Pressing using a mold comprising a projection surface corresponding to the shape and size of the rear portion and thin portion and the zipper and strip Thermally fusion bonding to the opposite surface for several seconds at a temperature of 100 ° C. to 200 ° C., and thermally fusion and cooling the edges of the opposite surface except for an opening at a temperature of 100 ° C. to 200 ° C. for several seconds, iii) the rear and It provides a method for producing a zipper bag having an easy cut structure comprising the step of forming a notch (notch) along the boundary of the thin portion and iii) cutting into individual packaging containers along the heat-sealed edge.

In addition, the present invention is characterized in that at least one of the open and close zippers integrally extruded to have the polyolefin synthetic resin sheet and the first and second strips is low density polyethylene (LDPE) or polypropylene (PP). Provided is a method of manufacturing a zipper bag having an incision structure.

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

Figure 1 is a detailed cross-sectional view of the opening of the zipper bag having an easy cut structure produced by the manufacturing method of the present invention. As shown in Figure 1, the opening of the zipper bag having an easy incision structure produced by the manufacturing method of the present invention in the inner side of the first and second opposing surfaces (20, 20 ') and the female profile and the male profile, respectively A zipper with tracks 30, 30 'having a first and second strips 10, 10' adjacent to the zipper and attached so as to extend on the opposite side of the unit, said zipper and strip 10 , 10 ') are each or together attached to the inner surface of the opposing surfaces 20, 20' in a heat-sealed manner. In addition, the upper end portions of the rear portions 11 and 11 'of the first and second strips 10 and 10' are fused to each other by heat fusion for sealing after putting the contents into a zipper bag manufactured by the present invention. .

A method for manufacturing a zipper bag having an easy cut structure according to the present invention is a soft fabric having a first and second opposing surfaces 20 and 20 'each having a laminated structure in which a plurality of polyolefin synthetic resin sheets and a protective sheet are laminated. Continuously feeding the film to the zipper bag maker. The opposing surfaces 20 and 20 'generally have a laminated structure in which a plurality of polyolefin synthetic resin sheets and protective sheets are laminated, which requires a certain level of strength to protect the inner contents from external impact and light. Because.

In addition, the method of manufacturing a zipper bag having an easy cut structure of the present invention is the step of separating and separating the first and second facing surfaces (20, 20 ') of the flexible film in a falling unit (falling unit) Include. This is to place the zippers and strips 10, 10 ′ between the first opposing face and the second opposing face, as follows.

In addition, a method for manufacturing a zipper bag having an easy cut structure of the present invention is a synthetic resin having a track 30 'having a female profile on one side of the opposite surface and a track 30 having a male profile corresponding to the opposite side. Positioning the zipper of ash in a predetermined position between the first and second opposing surfaces 20, 20 ′. The zippers are removably connected to each other so as to be reclosed and positioned at a predetermined position between the first and second opposing surfaces so as to be attached to the opposing surfaces through heat fusion as described below.

In addition, the method for manufacturing a zipper bag having an easy cut structure according to the present invention includes first and second relatively thick rear portions 11 and 11 'and thin thin portions 12 and 12', respectively. Positioning two strips (10, 10 ') adjacent the upper ends of the tracks (30, 30') and extending over the distal ends of the opposing surfaces (20, 20 '). The zipper bag having an easy cut structure manufactured by the manufacturing method of the present invention, when the user pulls the first and second heat-sealed strips 10 and 10 ', the cut is initiated from the notched portion formed as follows. Shear forces are applied at the boundary between the rear portions 11 and 11 'and the thin portions 12 and 12', causing cracks along the ends and opening the bag. That is, since the connection portion becomes a portion vulnerable to the shear force, the incision proceeds along the end portion during the incision of the bag. In order to prevent the shear force from being transmitted to the packaging container when opening the bag, the part positioned to extend over the distal end portion of the opposing surfaces 20 and 20 'is the whole of the rear parts 11 and 11' and a part of the thin part 12 and 12 '. The strips 10, 10 ′ are positioned so that the remaining portions of the foils 12, 12 ′, which are not positioned to extend over the distal end of the opposing face, are thermally fused to the packaging. The thicknesses, lengths, and lengths of the portions to be thermally fused to each of the rear portions 11 and 11 'and the thin portions 12 and 12' are determined by the shear force and the adhesive force by thermal fusion, and are commonly used in the art. If you have the knowledge of, the appropriate value can be obtained through calculation and experimental value.

The zipper and strip of the present invention may be molded in one piece. That is, one side of the opposing surface is provided with a track having a female profile and a track having a male profile corresponding to the opposite side, and a relatively thick rear portion and a relatively thin thin portion on top of each track, respectively. An integrally extruded openable and closed zipper strip having a first and a second strip to include may be positioned to extend over the distal end of the opposing face. As described above, the portion positioned to extend over the distal end of the opposing surface is preferably part of the rear portion 11, 11 'and thin portion 12, 12'.

 In addition, the method of manufacturing a zipper bag having an easy cut structure of the present invention includes a projection surface (41, 41 ') corresponding to the shape and size of the rear portion (11, 11') and thin portion (12, 12 '). Pressing using the mold (40, 40 ') and heat-sealed the zipper and strip (10, 10') to the opposing surface (20, 20 ') for several seconds at a temperature of 100 ℃ to 200 ℃, except the opening And heat-sealing and cooling the edges of the opposing surfaces 20 and 20 'for a few seconds at a temperature of 100 ° C to 200 ° C. As shown in FIG. 2, the molds 40 and 40 ′ used in the heat fusion and cooling steps of the present invention correspond to the shapes and sizes of the rear parts 11 and 11 ′ and the thin parts 12 and 12 ′ that are thermally fused. Protruding surfaces 41 and 41 'are provided. As described above, in the case of thermal fusion of the first and second strips and the packaging container using a conventional flat mold, the resin at the boundary between the rear part and the thin part is melted by the heat transferred to the resin. Lowering of the boundary may occur and the cutting of the opening of the zipper bag may not be easy. Therefore, in the present invention, to produce a zipper bag having an easy cut structure, the molds 40 and 40 'used in the heat fusion process may have protrusions 41 and 41 corresponding to shapes and sizes of the rear and thin portions of the strip. ′) So as to maintain the shape of the boundary portion of the rear portion (11, 11 ') and thin portion (12, 12') during heat fusion as it is so that an easy incision can be made when opening the zipper bag. The mold has a built-in hot wire coil. When the heat strip is fused to the strip 10, 10 ′, the hot wire coil is not embedded in the mold 40, 40 ′ corresponding to the rear portion so that the hot wire coil is not embedded therein. It prevents mutual heat welding and deformation. In addition, the zipper or strip used in the present invention is preferably a polyolefin resin of the same material as the opposite surface, more preferably low density polyethylene (LDPE) or polypropylene (PP). Since the melting point of LDPE or PP is between 130 ° C. and 180 ° C., the heat fusion is preferably performed at a temperature between 100 ° C. and 200 ° C., and is usually performed under a predetermined pressure. The temperature and pressure at the time of thermal fusion can be adjusted to appropriate temperature and pressure conditions if one of ordinary skill in the art. The heat fusion time is usually about a few seconds. After heat-sealing the zippers and strips 10 and 10 ', the edges of the opposing surfaces 20 and 20', except for the openings, are mutually heat-sealed and cooled for a few seconds at a temperature of 100 ° C to 200 ° C to form a zipper bag. do.

In addition, the method of manufacturing a zipper bag having an easy cut structure of the present invention includes the step of forming a notch (notch) along the boundary line of the rear portion (11, 11 ') and thin portion (12, 12'). This is to form the notch to facilitate the incision during the incision of the packaging container, and to allow the incision line to be made at the boundary between the rear portion (11, 11 ') and thin portion (12, 12').

One embodiment of the present invention through the above step is subjected to a step of cutting into individual packaging containers along the heat-sealed edge.

The zipper bag having an easy cut structure manufactured by the method of the present invention fills the contents through the opening and heat seals the upper ends of the rear portions of the first and second strips located at the ends of the opening to form a finished product. You lose.

As described above, when manufacturing the zipper bag according to the present invention, the shape of the boundary line of the rear part and the thin part is not deformed at the time of heat fusion, so that the shear force applied upon opening the packaging container can be transmitted as intended and easily cut and reliable. This high zipper bag can be manufactured.

An embodiment of the present invention described above and illustrated in the drawings should not be construed as limiting the technical spirit of the present invention. The protection scope of the present invention is limited only by the matters described in the claims, and those skilled in the art can change and change the technical idea of the present invention in various forms. Therefore, such improvements and modifications will fall within the protection scope of the present invention, as will be apparent to those skilled in the art.

1 is a detailed cross-sectional view of the opening of the zipper bag having an easy incision structure produced by the manufacturing method of the present invention

Figure 2 is a cross-sectional view of a mold having a projection surface corresponding to the shape and size of the rear portion and the thin portion of the strip that is heat-sealed at the end of the opening during heat-sealing of the opening part according to the manufacturing method of the present invention

<Brief description of the major reference numerals>

10 1st strip 10 '2nd strip

11 Rear 11 'Rear

12 minutes

20 first facing surface 20 'second facing surface

Track with 30 male profile Track with 30 'female profile

40 mold (top) 40 'mold (bottom)

41 mold protrusion surface 41 ′ mold protrusion surface

Claims (5)

Iii) continuously feeding the flexible film having the first and second opposing surfaces of a laminated structure in which a plurality of polyolefin synthetic resin sheets and a protective sheet are laminated, to a zipper bag maker; Ii) separating and spaced apart from the first opposing surface and the second opposing surface of the soft film in a falling unit; Iii) positioning an openable zipper having a track having an arm profile on one side of the opposing face and a track having a male profile corresponding to the opposite face at a predetermined position between the first and second opposing faces, Iii) positioning the first and second strips, each comprising a relatively thick rear end and a relatively thin thin end, adjacent the top end of the track and extending over the distal end of the opposing face, Iii) using a mold including a projection surface corresponding to the shape and size of the rear part and the thin part, and heat-sealing the zipper and the strip to the opposite surface for several seconds at a temperature of 100 ° C. to 200 ° C., except for an opening. Thermally fusion and cooling the edges of the opposite surfaces at a temperature of 100 ° C. to 200 ° C. for several seconds; Iii) forming a notch along the boundaries of the rear and lamellas, and Iii) a method for producing a zipper bag having an easy cut structure including cutting into individual packaging containers along the heat-sealed edge. The method of claim 1, At least one material of the polyolefin synthetic resin sheet, zipper and strip is a low density polyethylene (LDPE) or polypropylene (PP), characterized in that the manufacturing method of the zipper bag having an easy cut structure. The method according to claim 1 or 2, Method for manufacturing a zipper bag having an easy incision structure, characterized in that the step iii) and iii) are performed simultaneously. Iii) continuously feeding the flexible film having the first and second opposing surfaces of a laminated structure in which a plurality of polyolefin synthetic resin sheets and a protective sheet are laminated, to a zipper bag maker; Ii) separating and separating the first and second opposing surfaces of the flexible film in a falling unit; Iii) one side of the opposing surface is provided with a track having a female profile and a track having a male profile corresponding to the opposite side, and a relatively thick rear portion and a relatively thin thin portion on top of each track, respectively; Positioning an integrally extrudable, openable and integral zipper strip having a first and a second strip to extend over the distal end of the opposing face, Iii) pressing by using a mold including a projection surface corresponding to the shape and size of the rear portion and thin portion, and heat-sealing the zipper and the strip to the opposite surface for several seconds at a temperature of 100 ° C. to 200 ° C., except for an opening. Thermally fusion and cooling the edges of the opposite surfaces at a temperature of 100 ° C. to 200 ° C. for several seconds; Iii) forming a notch along the boundaries of the rear and lamellas, and Iii) a method for producing a zipper bag having an easy cut structure including cutting into individual packaging containers along the heat-sealed edge. The method of claim 4, wherein A zipper bag having an easy cut structure, characterized in that at least one of the open and close zippers integrally extruded to have the polyolefin resin sheet and the first and second strips is low density polyethylene (LDPE) or polypropylene (PP). Manufacturing method.