JP2009018819A - Packaging bag with zipper and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a packaging bag with a zipper, which is capable of suppressing generation of a new expenditure for installation as much as possible and manufacturing the packaging bag with a narrowed mouth part without increasing a cost. <P>SOLUTION: A bag body 2 in which either the upper end or the lower end is formed as the mouth part for filling and the zipper 6 over the whole length in the width direction is provided at a position close to the inner side of the upper end part, is formed. After this, notches 8 and 8 are applied at positions on both side edges on the upper end side of the bag body 2 so that the lateral width on the upper end side is narrower than the lateral width of the bag body 2, and the peripheral edges of the notches 8 and 8 on both sides in the bag body 2 are subjected to heat-sealing 9 and 9. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention costs a packaging bag with a zipper such as a flat bag or a gusset bag, which can prevent the contents from spilling excessively when the bag is tilted to take out the contents, and the packaging bag with a zipper. The present invention relates to a manufacturing method that can be manufactured inexpensively.

  As packaging bags with zippers for various products, flat bags and gusset bags with woven parts at least on both sides are known, and as the form of these packaging bags before filling the contents, the bottom is sealed in advance. There are an upper end filling type in which the upper end is opened and a lower end filling type in which the upper end is sealed in advance and the lower end is opened.

  In the packaging bag with a zipper as described above, the upper end filling type packaging bag has a flat cylindrical shape, and heat seals the lower end of the overlapped front sheet and rear sheet to make the upper end the filling port. A flat bag body is formed, and a zipper is provided across the entire length in the width direction at a position closer to the inside than the filling port on the inner surface at the upper end side of the bag body, and for cutting between the filling port at the upper end and the zipper After filling the contents from the filling port at the upper end, the contents are sealed by closing the zipper and heat-sealing the entire length of the filling port at the upper end. It is for distribution.

  In addition, the lower end filling type packaging bag is a bag body in which the zipper is closed and the upper end is heat-sealed, and after filling the contents from the lower end filling port, the entire length of the lower end is heat-sealed. .

  When taking out the contents from a packaging bag with a zipper as described above, cut the space for cutting, cut the heat sealed upper end, open the zipper, and close the zipper after opening As a result, the remaining contents are prevented from getting wet.

  By the way, the above-mentioned conventional packaging bag with a zipper has a straight structure in which the width of the bag body is equal to the width of the opening / closing port by the zipper, and after opening the upper end, the zipper is opened and the packaging bag is tilted. When taking out the contents into other containers, the opening by the zipper will open wide, and this will cause the contents to easily spill out when the packaging bag is tilted, and the contents will inevitably be taken out excessively. is there.

  In order to solve such problems when taking out the contents of a packaging bag with a zipper, the lateral width of the opening and closing port by the zipper is set to be narrower than the lateral width of the bag body, and the appearance is changed to improve the design. In addition, a bag with a zipper that narrows the mouth is proposed to prevent the contents from spilling out of the mouth when the bag is tilted and taken out into another container. (For example, refer to Patent Document 1).

In the conventional method of manufacturing the above-mentioned narrowed packaging bag, the bag body formed in the shape of a flat cylinder is welded in the middle of the bag-making process in which the front sheet and the back sheet are overlapped and fed around the front sheet. A notch is provided on both side edges at the upper end so that the upper end of the front seat and the rear seat are two open pieces, a pair of male and female zippers are supplied between the opposing faces by opening the two open pieces. A piece and zipper are welded, then both ends of the zipper are opened to the width of the piece, and both sides of the overlapped double piece are welded along the inner edge of the cutout to narrow the mouth. I am trying to finish it.
Japanese Patent Laid-Open No. 2005-199540

  By the way, the conventional method for manufacturing a packaging bag with a zipper with a narrowed mouth described above is a notch for making the upper end side of the front sheet and the rear sheet into two open pieces during the normal manufacturing process of the packaging bag. , A process of welding the bag body along the inner edges of the notches on both sides, a process of aligning both ends of the zipper, and a finishing process of cutting and removing the outer edge side of the welded part are necessary. There is.

  For this reason, in order to manufacture a packaging bag with a zipper with a narrowed mouth, these processes are introduced when a dedicated manufacturing facility is newly introduced or when an existing packaging bag manufacturing facility is used. Therefore, it is necessary to improve the equipment in the middle of the process. Therefore, in any case, a lot of cost is required, which increases the manufacturing cost of the packaging bag with a zipper with a narrowed mouth.

  Therefore, the object of the present invention is to provide a new equipment cost by post-processing the bag body by using the existing packaging manufacturing equipment as it is, and then processing to narrow the width of the opening by the zipper. It is an object of the present invention to provide a packaging bag with a narrowed zipper with a narrowed mouth and a method for manufacturing the same, which can suppress the occurrence of the above and can obtain a narrowed packaging bag with a zipper without increasing the cost.

  In order to solve the problems as described above, the invention of the packaging bag with a zipper is such that one of the upper end and the lower end is heat-sealed, so that the other becomes a filling port, and the entire length in the width direction is positioned closer to the inside of the upper end. A zipper is provided to form the bag body, and after this bag body is formed, a notch is provided at the upper edge of the bag body at both side edges so that the width of the upper edge is narrower than the width of the bag body. The configuration in which the peripheral edge of the notch on both sides is heat-sealed is adopted.

  Further, the invention of the method for manufacturing a packaging bag with a zipper is such that one of the upper end and the lower end is heat-sealed so that the other becomes a filling port portion, and a zipper is provided over the entire length in the width direction at a position closer to the inside of the upper end portion. After the bag body is created, a notch portion is provided at the position of both side edges on the upper end side of the bag body so that the width of the upper end side is narrower than the width of the bag body. The structure which heat-seals a periphery is employ | adopted.

  The bag body is configured to form a gusset on both sides so that the bag body can be self-supported with the contents filled, or the bag body has a cutting space between the upper end and the zipper. Can be.

  Here, the bag body is a flat bag or a gusset bag having a woven portion on both sides, and the form of the bag body is an upper end filling type in which the lower end is sealed and the upper end is opened, and the lower end is opened and the upper end is opened. However, such a bag body can be manufactured using an existing packaging bag manufacturing facility.

  With respect to the bag body manufactured as described above, in a separate post-process, a notch portion that allows the lateral width of the upper end side to be narrower than the lateral width of the bag body at positions on both sides on the upper end side of the bag body, By applying a heat seal to the periphery of the two notches in the bag body, a packaging bag with a zipper with a narrowed mouth is obtained, and both sides of the upper end of the bag body in the post-process after making the bag body. The equipment that heat-seals the notch and the peripheral edge of this notch is structurally simple, eliminating the need for new installation of dedicated manufacturing equipment or modification of existing packaging bag manufacturing equipment. A packaging bag with a zipper with a narrowed mouth can be manufactured at low cost.

  According to the present invention, after the bag body is made, the notch portion is provided in the positions on both sides on the upper end side of the bag body so that the lateral width on the upper end side is narrower than the lateral width of the bag body. Since heat sealing is applied to the peripheral edges of the two notches, the bag body can be produced with an existing bag making apparatus, and the packaging bag with a zipper with a narrowed mouth is inexpensive.

  In addition, after the bag body is made, a notch portion is provided at positions on both sides on the upper end side of the bag body so that the lateral width on the upper end side becomes narrower than the lateral width of the bag body. The bag body can be manufactured using existing bag making equipment, and the notch and heat sealing equipment can be manufactured with a simple structure and at a low cost. Therefore, the manufacture of packaging bags with a zipper with a narrowed mouth can be realized without introducing dedicated manufacturing equipment or modifying existing manufacturing equipment for packaging bags, reducing the cost of new equipment and reducing costs. It is possible to provide an inexpensive packaging bag with a zipper.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  First, the bag body 2 which is the basis of the zippered packaging bag 1 which is the object of the present invention includes a flat bag and gusset bags with weaving portions on both sides and, if necessary, at the bottom, before filling these contents. As the form of the bag body 2, there are an upper end filling type in which the lower end is sealed and the upper end is opened, and a lower end filling type in which the upper end is sealed and the lower end is opened. It can manufacture using the manufacturing apparatus of a bag.

  The bag main body 2 of the embodiment shown in the drawings is a gusset bag and shows a lower end filling type, and a front sheet 3 and a back sheet 4 using a heat-sealable synthetic resin sheet as shown in FIG. The two gusset sheets 5 and 5 are sandwiched between the front sheet 3 and the back sheet 4 so that both sides of the front sheet 3 and the back sheet 4 and both side edges of the gusset sheets 5 and 5 overlap. As shown in FIG. 1B, the upper end portion is heat-sealed, and the entire length in the width direction is positioned slightly inside (lower side) between the front sheet 3 and the back sheet 4 as compared to the upper end portion. A pair of male and female zippers 6 are welded together in an engaged state, and a cutting space 7 is formed between the upper end portion and the zipper 6, thereby forming a bag in a structure in which the lower end becomes a filling port portion, After filling, heat the bottom It will be Lumpur.

  Here, although not shown, the bag body 2 may be a flat bag, and in the case of the bag body 2 of the upper end filling type with a flat bag or a gusset bag, contrary to the lower end filling type described above, The lower end is sealed in advance and the upper end is opened. After the contents are filled, the zipper 6 is closed and the upper end is heat-sealed.

  After the bag body 2 is manufactured in the structure as described above, the lateral width of the upper end portion is narrower than the lateral width of the bag body 2 at the upper end position on both sides thereof as shown in FIG. The cutout portions 8 and 8 are provided so that the peripheral portions of the cutout portions 8 in the bag body 2 are heat-sealed 9 and 9, whereby the packaging bag 1 with a zipper with a narrowed mouth is processed.

  The notches 8, 8 are formed in a “J” shape from the upper end of the bag body 2 so that the lower end position is a vertical length located slightly below the zipper 6, and the heat seal 9 , 9 are provided so as to weld the overlapping portions of the front sheet 3, the rear sheet 4, and the gusset sheets 5, 5 along the inner periphery of the notches 8, 8.

  In order to manufacture the zippered packaging bag 1 having a narrowed mouth as described above, first, an existing bag making apparatus is used, and a flat bag or a gusset bag having a woven portion on both sides is used. The bag body 2 that is the lower end filling type is made.

  The bag body 2 is formed by a pair of male and female zippers 6 across the entire length in the width direction at a position slightly inside the upper end of the upper end between the opposed surfaces of the front sheet 3 and the back sheet 4 in the bag making process by the bag making apparatus. The zipper 6 is in a meshed state after welding, both ends are cut according to the lateral width of the bag body 2, and a cutting space 7 is formed between the seal at the upper edge and the zipper 6. ing.

  Next, the bag body 2 after bag making formed as described above is provided with notches 8 and 8 so that the lateral width of the upper end portion is narrower than the lateral width of the bag body 2 at both side positions on the upper end side. The width of the upper end side of the bag body 2 is made lower than the notches 8 and 8 in the bag body 2 by cutting out the positions of both sides on the upper end side of the bag body 2 including both ends of the zipper 6. Narrower than the width of the side part.

  With respect to the bag body 2 having the notches 8, 8 as described above, both sides of the front sheet 3 and the back sheet 4 and the gusset sheets 5, 5 along the inner periphery of the notches 8, 8. By heat-sealing the overlapping portions at both ends, the packaging bag 1 with a zipper with a narrowed mouth shown in FIG. 2A is finished.

  The lower end filling type packaging bag 1 with a zipper opens the lower end opening portion and fills the contents, and then seals the lower end as shown in FIG. 2 (b). In the case of the bag 1, the upper end opening and the zipper 6 are opened and the contents are filled, and then the upper end edge is sealed and used for packaging and distribution of the contents, respectively.

  When the contents are taken out from the packaging bag 1 with a zipper filled with the contents, the zipper 6 can be opened after cutting the space 7 for cutting and removing the seal portion at the upper edge. The attached packaging bag 1 has a narrowed structure because the width of the upper end is narrowed by the notches 8 and 8, so that the packaging bag 1 with zipper is tilted and the contents are placed in another container. When the zipper 6 is opened, the opening amount of the opening formed by opening the zipper 6 is narrowed, and it is possible to prevent the contents from spilling excessively at the portion narrowed by the notches 8 and 8. There is an advantage.

(A) is the perspective view of the state which folded the gusset sheet in the both sides of a front sheet and a back sheet in the process of making a bag main part of a packaging bag with a zipper, (b) is both sides of each of a front sheet and a back sheet, and each The perspective view which shows the bag body of the lower end filling type which heat-sealed the circumference of a gusset sheet and welded the zipper to the upper end part (A) is a perspective view which shows the lower end filling type of the packaging bag with a zipper of this invention, (b) is a perspective view of the state which filled the contents in the packaging bag with a zipper (A) is an enlarged longitudinal sectional view taken along arrow aa in FIG. 1, and (b) is an enlarged longitudinal sectional view taken along arrow bb in FIG.

Explanation of symbols

1 Packaging bag with zipper 2 Bag body 3 Front sheet 4 Back sheet 5 Gazette sheet 6 Zipper 7 Space 8 Notch 9 Heat seal

Claims (4)

  By heat-sealing one of the upper end and the lower end, the other becomes a filling port, and a bag body is formed by providing a zipper over the entire length in the width direction at a position closer to the inside of the upper end, and after forming the bag body, A packaging bag with a zipper in which a notch is provided at a position of both side edges on the upper end side of the main body so that the width of the upper end side is narrower than the width of the bag main body, and the periphery of the notch is heat sealed.   By heat-sealing one of the upper end and the lower end, the other becomes a filling port portion, and a bag body is provided with a zipper extending over the entire length in the width direction at a position closer to the inside of the upper end portion, and then the upper end of the bag body A method for manufacturing a packaging bag with a zipper, which is provided with a notch portion at both side edge positions on the side so that the lateral width of the upper end side is narrower than the lateral width of the bag body and heat-sealing the peripheral edge of the both side notch portion .   The manufacturing method of the packaging bag with a zipper of Claim 2 in which the both sides are formed so that a gusset may be formed so that the said bag main body can become independent in the state with which the content was filled.   The manufacturing method of the packaging bag with a zipper of Claim 2 or 3 with which the said bag main body is provided with the space for a cutting | disconnection between an upper end part and a zipper.

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