JP2018039569A - Method for manufacturing gazette bag for forming gazette bag with spout - Google Patents

Abstract

A method for producing a gusset bag body capable of easily and efficiently producing a spout-attached gusset bag having a high fixing strength at a fixing portion of the spout is provided. A manufacturing method of a gusset bag body includes a gusset structure forming process for forming a gusset structure, a mounting process for mounting the gusset structure on a synthetic resin film for forming a body on the back side, and a belt-shaped member 10 is a belt-like member fusion process for fixing a gusset structure to a synthetic resin film, a heat sealing process for heat sealing two synthetic resin films sandwiching the gusset structure, and a heat-sealed synthetic resin. It has the cutting process which cuts a film laminated body by predetermined shape, and obtains the gusset bag body 1. FIG. The manufactured gusset bag 1 is heat-sealed on the back surface of the back body 2b by the band-like member 10 at the upper end of each folding material 3a, 3b sandwiched between the left and right body materials. ing. [Selection] Figure 7

Description

  In the present invention, a synthetic resin spout (extraction member) is fixed to an upper portion of a gusseted bag made of a synthetic resin film, and packaging of various liquids and powders such as foods, medicines, cosmetics, and detergents. The present invention relates to a method for producing a gusset bag body which is a semi-finished product for forming a spouted gusset bag used as a bag for use.

  Conventionally, as packaging bags for various liquids and powders such as foods, medicines, cosmetics, and detergents, various pouches and gusset bags formed with sheets of synthetic resin films and laminated films (on both the left and right sides, So-called gussets) are widely used, and a pouch with a spout or a gusset bag with a spout in which a hard synthetic resin spout (pouring member) is fixed to the upper edge of the pouch or gusset bag. Is also used (Patent Document 1).

  As a method of manufacturing such a spouted gusset bag, the left and right sides and the bottom of the synthetic resin film laminate are placed with the synthetic resin film folded in half between the left and right ends of the two front and back synthetic resin films. Heat-sealed to form a gusseted three-sided bag, and then insert the adhesive part provided at the base end of the spout into the opening of the three-sided bag, and synthesize the two front and back sides of the synthetic resin film laminate A method of fusing the resin film to the adhesive portion is employed.

JP 2011-31895 A

  However, in the method for manufacturing a gusset bag with a spout as described in Patent Document 1, when the spout is fixed to the opening of a three-sided bag with a gusset, the width of the opening is too wide and the gusset is configured. Since the synthetic resin film and the synthetic resin films on the front and back sides slide with each other, it is very difficult to align the spout. For this reason, the spout is not fused at an appropriate position, and a situation occurs in which the fusion strength between the spout and the front and back synthetic resin films is lowered.

  The object of the present invention is to solve the problems of the conventional method for manufacturing a gusset bag with a spout, and the fixing strength (fusion strength) of the fixing portion of the spout is high, so that the content leaks even when pressure is applied. The present invention is to provide a method for producing a gusset bag body (that is, a semi-finished product for forming a gusset bag with a spout) that can easily and efficiently produce a gusset bag with a spout that is not produced. .

Among the present inventions, the invention described in claim 1 is formed in a bag shape with gussets on the left and right sides of the front and back body members by a synthetic resin film, and a synthetic resin spout is inserted and fixed. A manufacturing method for manufacturing a gusset bag body for forming a gusset bag with a spout (that is, a semi-finished product for forming a gusset bag with a spout) provided with an opening for substantially the center of the head, It has the following processes (a) to (e).
(A) A gusset structure forming step of forming a gusset structure by folding back the left and right sides of a long strip-shaped synthetic resin film. (B) The formed gusset structure is long for forming the body on either the front or back side. (C) a long belt-like member having a heat-sealing layer is placed on the first synthetic resin film in the form of a belt at a predetermined interval so that the longitudinal directions thereof are orthogonal to each other; A belt-like structure in which a plurality of gussets are fixed to the first synthetic resin film by heat-sealing so as to cross an intermediate position in the longitudinal direction of the plurality of gussets placed on the synthetic resin film Member fusion step (d) On the first synthetic resin film to which a plurality of gusset components are fixed, the second synthetic resin film in the form of a long belt for forming the other body is coated, Outside edges of a plurality of gusset structures sandwiched (ie, gusset structure) By fixing the plurality of gussets, the first synthetic resin film, and the second synthetic resin film by heat-sealing the central portion in the width direction and the central portion in the width direction with a constant width. A heat sealing step of forming a synthetic resin film laminate (e) a heat-sealed portion of a belt-shaped member crossing the intermediate position in the longitudinal direction of the plurality of gusset components sandwiched between the formed synthetic resin film laminate; A cutting step of forming a gusset bag body by cutting at the center heat seal portion in the width direction of the plurality of gusset components sandwiched

  The invention described in claim 2 is the spout fixing part to which the gap between the gusset components to be placed on the first synthetic resin film in the placing step is attached in the invention described in claim 1. It is characterized by being made smaller than the width of.

According to a third aspect of the present invention, in the first or second aspect of the present invention, between the band-shaped member fusion step (c) and the heat seal step (d), the following ( It has the process of f).
(F) The outer edge of each gusset structure that is not heat-sealed to the belt-like member is bent so as to have a bifurcated tapered shape, and the outer edge of each folded gusset structure is formed. , A sandwiching step of sandwiching a long, strip-shaped third synthetic resin film for forming the lower folding part

  According to the method of manufacturing a gusset bag body for forming a gusset bag with a spout according to claim 1 (hereinafter, simply referred to as a gusset bag body), when the spout is fixed (fused) to the upper edge, the opening is enlarged. A gusset bag body that can be fixed efficiently and easily without causing a situation where the spout to be fixed interferes with the left and right folding materials, and with a simple process. And inexpensive production.

  According to the method for manufacturing a gusset bag according to claim 2, the synthetic resin film located outside the left and right edges of the portion to which the spout of the gusset bag manufactured is fixed is thick and difficult to bend. It will be a thing. Therefore, according to the method for manufacturing a gusset bag according to claim 2, the spout-attached gusset bag finally obtained is spouted when the contents such as the liquid filled therein are poured out from the spout. The contents can be poured out smoothly without wobbling.

  According to the method for manufacturing a gusset bag according to claim 3, the content is very large and the contents can be easily filled, and a highly self-supporting gusset bag is obtained by a simple process with high yield and efficiency. In addition, it can be manufactured at a low cost.

It is explanatory drawing which shows the gusset structure formation process in the manufacturing method of the gusset bag body of Example 1 (a shows the state which turned up and down of the synthetic resin film, and b is the synthesis which turned up the right and left. FIG. 2 shows a state in which opposite edges of the resin film are connected and cut at a predetermined interval, and c is a vertical end face of the formed gusset (a vertical end face perpendicular to the longitudinal direction of the synthetic resin film). Is shown). It is explanatory drawing which shows the mounting process in the manufacturing method of the gusset bag body of Example 1. FIG. It is explanatory drawing which shows the strip | belt-shaped member melt | fusion process in the manufacturing method of the gusset bag body of Example 1. FIG. It is explanatory drawing which shows the heat seal process (previous stage) in the manufacturing method of the gusset bag body of Example 1. It is explanatory drawing which shows the heat seal process (back | latter stage) in the manufacturing method of the gusset bag body of Example 1. FIG. It is explanatory drawing which shows the cutting process in the manufacturing method of the gusset bag body of Example 1. FIG. It is explanatory drawing (front view) which shows the gusset bag body manufactured by the manufacturing method of Example 1. FIG. It is explanatory drawing which shows the gusset bag body manufactured by the manufacturing method of Example 1 (a is an AA line end view in FIG. 7, b is a BB line end view in FIG. 7, c is (b) is an enlarged view of a circular portion in b, and (d) is an end view taken along the line CC in FIG. 1). It is explanatory drawing which shows a spout (a is a front view, b is a bottom view, c is a side view). It is explanatory drawing (front view) which shows the gusset bag body which fixed the spout. It is explanatory drawing (DD line end surface figure in FIG. 10) which shows the gusset bag body which fixed the spout. It is explanatory drawing (perspective view) which shows the gusset bag body which fixed the spout. It is explanatory drawing which shows the gusset structure formation process in the manufacturing method of the gusset bag of Example 2 (a shows the state which folded the right and left of the synthetic resin film, and b is the synthetic resin which folded the right and left. It shows a state where the opposite edges of the film are tied and cut at a predetermined interval, and c is a vertical end face of the formed gusset structure (a vertical end face perpendicular to the longitudinal direction of the synthetic resin film). Is shown). It is explanatory drawing which shows the mounting process in the manufacturing method of the gusset bag of Example 2. FIG. It is explanatory drawing which shows the strip | belt-shaped member melt | fusion process in the manufacturing method of the gusset bag of Example 2. FIG. It is explanatory drawing which shows the pinching process (previous stage) in the manufacturing method of the gusset bag of Example 2. It is explanatory drawing which shows the pinching process (back | latter stage) in the manufacturing method of the gusset bag of Example 2. FIG. It is explanatory drawing which shows the heat seal process (previous stage) in the manufacturing method of the gusset bag of Example 2. It is explanatory drawing which shows the heat-sealing process (back | latter stage) and the cutting process in the manufacturing method of the gusset bag of Example 2. FIG. It is explanatory drawing which shows the gusset bag body manufactured by the manufacturing method of Example 2 (a is a front view, b is an EE line end view in a). It is explanatory drawing which shows the folding material of the right and left of the gusset bag body manufactured by the manufacturing method of Example 2, and the folding material of a bottom part (a is a front view, b is the left side surface at the time of the lower end of the left folding material. FIG. 3 is an end view (that is, an arrow view in the direction of arrow F in a), and c is a perspective view in a state where the left side folding material and the bottom folding material are separated.

  In the manufacturing method according to the present invention, a synthetic resin film is used as a material for forming the gusset bag. The synthetic resin film (or synthetic resin sheet) referred to here is a single (single film) synthetic resin film or a plurality of synthetic resin films used as packaging materials for foods, drugs, cosmetics, detergents, etc. Or a laminated film obtained by laminating a synthetic resin film and paper, aluminum foil or the like. The synthetic resin film used in the gusset bag according to the present invention needs to have at least one surface (inner surface) having thermal adhesiveness.

  As such a synthetic resin film, a laminate film obtained by laminating a thermal adhesive film such as a polyethylene film or a polypropylene film on a base film such as a polyester film, a nylon film, or a polypropylene film can be suitably used. In addition, a laminate film having three or more layers in which a polyester film, a nylon film or the like is sandwiched between such laminate films can also be suitably used.

  The base film or the film forming the intermediate layer can be an unstretched film, or a uniaxially stretched film or a biaxially stretched film. In addition, metal foil may be used as necessary at the interface between the base film and the heat-adhesive film, the interface between the base film and the film forming the intermediate layer, and the interface between the film forming the intermediate layer and the heat-adhesive film. It is also possible to provide a layer or a metal vapor deposition layer. On the other hand, the thickness of the synthetic resin film is not particularly limited, but is preferably 40 to 250 μm and more preferably 110 to 180 μm from the viewpoints of storage performance with respect to the contents and resistance to tearing the bag.

  The manufacturing method of the gusset bag body according to the present invention includes the above-described synthetic resin film, the above-described gusset structure forming step (a), the placing step (b), the band-shaped member fusion step (c), the heat sealing step ( d) and a manufacturing process including a cutting step (e), and laminating in a predetermined manner, heat sealing a predetermined portion of the laminate, and cutting at a predetermined site to form a spouted gusset bag. For this purpose, a gusset bag body (that is, a bag-shaped body having so-called gussets (folded portions) on the left and right sides with the upper part opened) is manufactured. Moreover, in the manufacturing method of the gusset bag which concerns on this invention, the pinching process (f) for forming the folding part of a bottom part is implemented between a strip | belt-shaped member melt | fusion process (c) and a heat seal process (d). It is also possible to do.

  Each heat seal (formation of the seal portion such as the side and bottom of the gusset bag body, heat seal of the belt-like member) and cutting can be performed as a series of processing using a gusset bag making machine. It is also possible to carry out as a batch (non-series) processing. The temperature of heat sealing is not particularly limited, but when a synthetic resin film having a polyethylene (linear low density polyethylene) film as a heat-adhesive film is used, it should be within a range of 170 to 210 ° C. preferable.

  The gusset bag produced by the production method according to the present invention is generally rectangular in front view, but the size is not particularly limited, and the height and width are within a range of about 50 to 350 mm. Can be adjusted as needed. Moreover, the gusset bag body manufactured by the manufacturing method according to the present invention is provided with gussets (portions folded inwardly in both sides) on both the left and right sides. Width) is not particularly limited, and can be adjusted as necessary within a range of about 10 mm to less than half of the width of the gusset bag.

  On the other hand, when a spouted gusset bag is formed using the gusset bag manufactured by the manufacturing method according to the present invention, a synthetic resin is formed inside the opening of the gusset bag formed as described above. The spout is fixed (fused). Such a spout can be suitably made of a hard synthetic resin or the like, and a spout body (a member in which an adhesive portion is connected to the lower portion of the spout portion) and a cap are separately molded 2 A piece type may be sufficient and the 1 piece type thing by which the spout body and the cap were integrally shape | molded via the thin part may be sufficient. The material of the spout body needs to be able to be thermally bonded (fused) with the heat-adhesive film of the gusset bag body, such as polyethylene (linear low density polyethylene, medium density polyethylene or high density). Polyethylene), polypropylene, polyester and the like.

  Hereinafter, one Example of the manufacturing method of the gusset bag body (semi-finished product for forming a gusset bag with a spout) according to the present invention will be described.

[Example 1]
<Gazette bag manufacturing method>
FIGS. 1-6 shows a mode that a gusset bag body is manufactured with the manufacturing method of Example 1. When manufacturing a gusset bag body, first, as shown in FIG. strip of a synthetic resin film having a constant width (approximately 235 mm) (one side those having heat-adhesive) folded back left and right F _M (folded so that the heat-adhesive face on the outside), the folded portion 41 and 41 Form. Thereafter, so as to extend over confronting end edges to each other in their folded portions 41 and 41, elongated separating prevention tape having a constant width in the same synthetic resin film made with a synthetic resin film F _M (about 10mm wide) 44 are overlapped and heat-sealed so that the heat-adhesive surface is on the inside, thereby connecting the facing edges of the folded portions 41 and 41 together.

In parallel with such a synthetic resin film for tethering facing the edge between the folded portions 41 and 41 of the F _M, as shown in FIG. 1 (b), (approximately 240mm intervals) at predetermined intervals, bored a pair of right and left substantially elliptical through-holes 45, 45 ... so as to extend through the base portion and a folded portion 41 of the synthetic resin film F _M. Further, as such a synthetic resin film F _M bored through holes 45, 45 ..., (at approximately 480mm intervals) at predetermined intervals so as to be perpendicular to the longitudinal direction by cutting, gusset structure 43, 43... Are formed (gusset structure forming step). Incidentally, the cutting of such a synthetic resin film F _M is performed at the center of the drilled position of every other through holes 45, 45 ... in the longitudinal direction of the synthetic resin film F _M.

After that, the gusset components 43, 43,... Formed as described above are formed into a long strip-shaped synthetic resin film F ₁ (first synthetic resin) having a constant width (approximately 480 mm width) for forming the body material on the back side. (See FIG. 2). So when placing the gusset structure 43 ... on the synthetic resin film F ₁ is the side having a heat-adhesive synthetic resin film F ₁ on the inside, the gusset structure 43 · longitudinal direction perpendicular to the longitudinal direction of the synthetic resin film F ₁ of the adjustment so that the distance gusset structure 43, 43 ... adjacent (alpha in Figure 2) has a predetermined distance (about 20 mm) (Placement process).

Furthermore, after the gusset structure 43, 43 ... as mentioned above is placed on the synthetic resin film F ₁ is the center position in the longitudinal direction and the width direction of the placed gusset structure 43 .. by heat-sealing the synthetic resin film _{F 1} so that the circular substantially 10 mm, is temporarily fixed gusset structure 43, 43 .... Thereafter, both sides are using the belt-shaped member 10 elongated with a heat-adhesive, to fix the gusset structure 43 ... synthetic resin film F _1. That is, as shown in FIG. 3, the belt-shaped member 10, transverse to the longitudinal direction of the intermediate position of the synthetic resin film F ₁ placed on the gusset structure on the 43, 43 ... (i.e., synthetic resin films F ₁ and so as to match the longitudinal direction) is arranged in a straight line, by the belt-shaped member 10 continuously heat-sealed, and the outer surface of the synthetic resin film F _M constituting the gusset structure 43 .. The belt-like member 10 is fused, and the inner surface (the surface having thermal adhesiveness) of the synthetic resin film F ₁ and the belt-like member 10 are fused between adjacent gusset components 43 and 43 (heat seal). Part Ha). Then, by continuously heat sealing profile strip 10 as such, via the belt-shaped member 10, to fix the gusset structure 43 ... synthetic resin film F ₁ (strip fusing step).

As described above, through the belt-shaped member 10, the after fixing the gusset structure 43 ... synthetic resin film F ₁ is as shown in FIG. 4, on the synthetic resin film F _1, the synthetic resin film A long strip-shaped synthetic resin film F ₂ (second synthetic resin film) having a constant width (approximately 480 mm width) for forming the front side body material made of the same synthetic resin film as F ₁ is synthesized with the left and right edges. It is coated to match the left and right edges of the resin film F _1. Then, the after-coated so the synthetic resin film F _2, when the outer edge of the sandwiched gusset structure 43 ... between the synthetic resin film F ₁ and the synthetic resin film F ₂ ( That is, the longitudinal ends of the gusset components 43, 43,... Are heat-sealed with a certain width (about 13 mm width) (heat seal portion Hb).

Further, in parallel with the heat sealing of the outer edges of the gusset components 43, 43,... Sandwiched between the _two synthetic resin films F ₁ and F ₂ as shown in FIG. The center part in the width direction of the gusset components 43, 43,... Sandwiched between the _two synthetic resin films F ₁ and F ₂ is heat-sealed with a constant width (about 24 mm width) (heat seal portion) Hc). In addition, the center part in the width direction of the gusset components 43, 43,... Is heat-sealed at the same time, and at the same time, the heat seal portion Hc and the gusset structure in the center of the gusset components 43, 43,. The heat seal is applied in an inclined shape with a constant width (about 7 mm width) so as to straddle the heat seal portion Hb near the outer edges of 43, 43,... (Heat seal portion Hd). Thus, by heat-sealing the outer edges of the gussets 43, 43,... And the central part in the width direction, the two synthetic resin films F ₁ , F ₂ and the gussets 43, 43,. A synthetic resin film laminate 46 is formed.

Then, as described above, after forming the two synthetic resin films F _1, F ₂ and gusset consisting construct 43 ... synthetic resin film laminate 46, as shown in FIG. 6, the synthetic resin film laminated The body 46 is cut in a predetermined manner. That is, the synthetic resin film laminate 46 formed in a continuous long shape crosses the longitudinal intermediate position of the gusset components 43, 43... Between the _two synthetic resin films F ₁ and F _2. Are cut at the approximate center (position β in FIG. 6) and the center of the heat seal portion Hc in the center in the width direction of the gusset components 43, 43... (Position γ in FIG. 6). (Cutting process). By cutting the synthetic resin film laminate 46 in such a manner, it is possible to continuously form the gusset bag bodies 1, 1... Having one side opened and gussets on the left and right sides.

<Configuration of gusset bag>
7 and 8 show the gusset bag formed as described above. Gusset bag body 1, the synthetic resin film F ₂ front of the barrel member 2a formed of a synthetic resin film F ₁ backside of the body member 2b which is formed from a synthetic resin film F _M right folding member 3a formed from , 3b and the belt-like member 10 are overlapped in a predetermined manner, and a predetermined portion is heat-sealed to form a bag shape having an open top.

  The front and back body materials 2a and 2b are made of a 15 μm thick nylon film (base film) and a 12 μm thick polyester film (intermediate layer) on which an aluminum vapor deposition surface is bonded to the nylon film. Is formed into a substantially rectangular shape by a synthetic resin film obtained by laminating a linear low density polyethylene film (thermoadhesive film) having a thickness of 130 μm thereon, and length × width = 240 mm × 130 mm. It has the size.

  Then, on both the left and right sides of the body materials 2a and 2b, folding materials 3a and 3b formed of the same synthetic resin film as the body materials 2a and 2b are respectively provided with a predetermined width (about 55 mm width). It is sandwiched in a folded state. The front and back body materials 2a and 2b are respectively arranged with the linear low-density polyethylene film (thermal adhesive film) layer inside, and the folding materials 3a and 3b are linear low-density polyethylene films. It arrange | positions in the state which made the layer into the back surface side of body material 2a, 2b of front and back. In addition, the side edges of the left and right folding members 3a and 3b that are not on the side of the folding ridge line (that is, the left edge at the upper end of the left folding member 3a and the right edge at the upper end of the right folding member 3b) On the other hand, substantially semi-elliptical through-holes 17 and 17 are provided so as to pass through the two folded folding members 3a and 3b, respectively.

  Further, in the portion at the upper end of the gusset bag body 1, the folding members 3 a and 3 b are fixed to the inner surface of the back body member 2 b by the belt-like member 10. The belt-like member 10 is a three-layer synthetic structure in which a linear (linear) low-density polyethylene (LLDPE) film having a thickness of 50 μm is laminated on top and bottom of a nylon film (base film) having a thickness of 100 μm. By the resin film, it is formed in a strip shape (tape shape) of length (vertical width) × width = 30 mm × 130 mm (that is, the strip-shaped member 10 has both heat and adhesive properties on both sides).

  And in the part near the upper end of the gusset bag 1, the band-like member 10 is heated from the outside of the body 2b on the back side while being pressed against the folding materials 3a and 3b from the inside, thereby folding the folding material. It is heat-sealed to 3a, 3b and the body material 2b on the back side. That is, as shown in FIG. 8 (b), the outer surface of the belt-like member 10 and the back surface (inner surface) of the body member 2b are fused together at the center portion at the upper end of the gusset bag body 1. In the left and right portions near the upper end of 1, the outer surface of the belt-like member 10 and the back surfaces of the folding members 3 a and 3 b are fused together. Further, on the outer side of the belt-like member 10 fused with the back surfaces of the folding materials 3a and 3b, the back surface (inner surface) of the back body 2b and the back surfaces of the folding materials 3a and 3b are fused. . Further, in the through holes 17 and 17 of the left and right folding members 3a and 3b, the outer surface of the belt-like member 10 and the back surface of the body member 2b are directly fused. As described above, in the portion near the upper end of the gusset bag body 1, the left and right folding members 3 a and 3 b are heat-sealed to the back side body material 2 b by the belt-like member 10. An opening 9 having a large area for adhering (fusing) the spout is formed between the member 10 and the member 10.

  On the other hand, in the laminated portion of the body materials 2a, 2b and the folding materials 3a, 3b at the left and right side edges of the gusset bag body 1, there are strip-shaped side seal portions 5, 5,. In the side seal portions 5, 5..., The back surface of the front-side body material 2 a and the back surfaces of the folding materials 3 a and 3 b, and the back surface of the back-side body material 2 b and the folding materials 3 a and 3 b The back sides are fused together. Further, the body 2a and the belt-like member 10 are fused together at the front end (body 2a side) of the side seal portions 5, 5.

  Further, at the edge of the lower end of the gusset bag body 1, a bottom seal portion 7 is formed in a belt shape having a substantially constant height (about 13 mm), and a portion near the lower end of the side seal portions 5, 5. They are overlapping. And, in the central portion of the bottom seal portion 7, the back side of the front side barrel 2a and the back side of the back side barrel 2b are fused together, The back surfaces of the body materials 2a and 2b and the back surfaces of the folding materials 3a and 3b are fused together.

  Further, at the edge of the left and right lower ends of the gusset bag body 1, strip-shaped inclined seal portions 20 each having a constant width (about 7 mm) so as to reach the bottom seal portion 7 from the left and right side seal portions 5, 5. , 20... Are provided, and the inclined seal portions 20, 20... Are inclined by about 45 ° with respect to the horizontal direction. Further, the outer edge of the inclined seal portion 20, 20,... Overlaps with the side seal portion 5, 5, .., and the inner edge (lower end edge) of the inclined seal portion 20, 20,. Is overlapped with the bottom seal portion 7.

  Further, spot fused portions 19 and 19 are provided at the portions (gusset portions) at the left and right ends of the bottom seal portion 7, respectively. In the spot fusion | bond part 19 and 19, the substantially semi-elliptical through-hole (not shown) is provided so that it may penetrate through the folding materials 3a and 3b folded in half, Through these through-holes, The back surface of the front body 2a and the back surface of the back body 2b are directly fused together.

<Usage of gusset bag>
(1) Formation of gusset bag with spout The gusset bag body 1 formed as described above can be used as a gusset bag with a spout by fixing the spout to the opening 9 at the upper end. FIG. 9 shows a spout to be fixed to the gusset bag body 1. The spout 11 is a so-called two-piece type in which the spout body 12 and the cap 13 are separately formed, and both the spout body 12 and the cap 13 are made of polyethylene. The spout body 12 has a four-layered adhesive portion 15 (adhered portion) connected continuously to the lower portion of the spout portion 14 for extracting contents, and the horizontal cross section for fusing with the gusset bag body. Has been. And the extraction hole 18 is provided so that those spout bodies 12 and the adhesion part 15 may be penetrated up and down. Further, thin plate-like fusion assisting pieces 16, 16 are provided on the left and right sides of the bonding portion 15. The bonding portion 15 has a height of about 10 mm.

  When the spout 11 is fixed (fused) to the gusset bag body 1, the adhesive portion 15 of the spout 11 is inserted between the two front and back body materials 2 a and 2 b at the opening 9 of the gusset bag body 1. Then, a hot plate provided with a concave curved surface heated to a predetermined temperature (about 210 ± 5 ° C.) is pressed on the body materials 2a and 2b located outside the bonding portion 15 to bond the spout 11 15 and the back surfaces of the body materials 2a and 2b are fused (heat sealed). That is, the horizontally long strip-shaped upper seal portion 8 is formed so as to overlap the left and right side seal portions 5 and 5 by heat-sealing the upper end portion of the gusset bag body 1 with a constant width.

  When the spout 11 is fixed, the left and right folding members 3a and 3b are fixed to the trunk 2b by the belt-like member 10 in the vicinity of the opening 9 in the gusset bag body 1, so Since the materials 3a and 3b do not get in the way (do not interfere) (that is, the area of the opening 9 is wide), the spout 11 can be fixed very easily. Moreover, the clearance gap which leaks the content filled later is not produced around the spout 11 to which it adheres.

  FIGS. 10-12 shows the gusset bag with a spout formed by adhering the spout 11 to the gusset bag body 1. The spout-attached gusset bag 21 has the adhesive portion 15 of the spout 11 and the back surface of the body 2a fused together on the front side of the body 2a, and the spout 11 is bonded to the back side of the body 2b. The part 15 and the inner surface of the belt-like member 10 are fused together.

(2) Filling contents The spouted gusset bag 21 formed as described above is used by filling the contents (for example, shampoo, etc.) from the extraction hole 18 of the spout 11. When the liquid is filled in such a manner, the intermediate portions (portions other than the edges of the upper and lower edges) of the folded materials 3a and 3b which are folded in two are expanded, and the left and right front and rear inclined seal portions 20, 20,. At the upper end portion (ie, the portion where the side seal portions 5, 5,... And the inclined seal portions 20, 20,... Overlap), the body 2a and the body 2b are bent together with the folding materials 3a, 3b. In order to form a horizontally long rectangular bottom, the lower part has a substantially rectangular parallelepiped shape (lateral width × depth = about 130 mm × about 80 mm). Therefore, the spouted gusset bag 21 can be raised in a stable state and can be used for display or the like as a product.

<Effects of manufacturing method of gusset bag>
The manufacturing method of the above-described gusset bag body 1 of Example 1 includes the following steps (a) to (e). Therefore, according to the manufacturing method of the gusset bag body 1 described above, the gusset bag body 1 can be produced efficiently and inexpensively with a high yield by a simple process.
(A) by folding the left and right elongated strip of synthetic resin film F _M, with anchoring part of their confronting end edges, a synthetic resin film F _M with folding the left and right predetermined every length A gusset forming process for cutting and forming gusset structures 43, 43,... (FIG. 1)
The (b) formed gusset structure 43 ..., on the synthetic resin film F ₁ strip elongated for the front side of the cylinder member formed, at predetermined intervals so that the longitudinal directions are perpendicular to each other Placement process (Figure 2)
(C) a belt-shaped member 10 elongated with a heat sealable layer, transverse to the longitudinal direction of the intermediate position of the first synthetic resin film F ₁ more placed on the gusset structure 43 .. by heat-sealing to, belt-shaped member fusion step to fix the plurality of gusset structure 43 ... in the first synthetic resin film F ₁ (FIG. 3)
(D) On the first synthetic resin film F ₁ to which the plurality of gusset components 43, 43,... Are fixed, a long strip-shaped second synthetic resin film F ₂ for forming the front side body material is provided. A plurality of gusset components 43, 43,... Are covered and heat-sealed with a constant width at the outer edges of the plurality of gusset components 43, 43,. And a heat sealing step for forming a synthetic resin film laminate 46 formed by fixing the first synthetic resin film F ₁ and the second synthetic resin film F ₂ (FIGS. 4 and 5).
(E) The central portion of the heat-sealed portion of the belt-like member 10 that crosses the intermediate position in the longitudinal direction of the plurality of gusset components 43, 43,. ) And the central portion (γ in FIG. 6) of the heat seal portion in the center in the width direction of the plurality of gusset components 43, 43,. Cutting process (Figure 6)

Moreover, in the manufacturing method of the gusset bag body 1 of Example 1 mentioned above, the space | interval of the gusset structure bodies 43 and 43 ... which are mounted on the _1st synthetic resin film F1 in a mounting process (b). However, it is adjusted so that it may become smaller than the width | variety of the adhering part (adhesion part 15) of the spout 11 to be attached. Therefore, according to the manufacturing method of the gusset bag body 1 described above, the synthetic resin film positioned outside the left and right edges of the portion to which the spout 11 of the gusset bag body 1 to be manufactured is fixed is bent with a thickness. Since the gusset bag 21 with the spout that is finally obtained pours out the contents such as the liquid filled in the spout 11 from the spout 11 to the outside, the spout 11 is not wobbled smoothly. Can be poured out.

<Effects of manufactured gusset bag>
The above-described gusset bag body 1 of the first embodiment is formed by sandwiching folded materials 3a and 3b that are folded in two on the left and right sides of the front and back body members, respectively, The upper end portions of the folding members 3a and 3b are heat-sealed to the back surface of the body 2b on the back side by a belt-like member 10 made of synthetic resin and having a constant width, so that the spout 11 is fixed (melted) to the upper edge. The opening 9 can be enlarged and the spout 11 to be fixed does not interfere with the left and right folding members 3a and 3b, so that the spout 11 can be fixed efficiently and easily. Can do.

  In addition, the gusset bag 1 is heat-sealed at the upper end of the left and right folding members 3a and 3b together with the back surface of the body 2b on the back side by a single band-like member 10, so that In this heat sealing step, the left and right folding materials 3a and 3b can be heat sealed to the body material 2b, so that they can be manufactured easily and inexpensively. In addition, since the left and right folding members 3a and 3b are heat-sealed together on the back surface of the back body 2b, the opening 9 is opened (so as not to be distorted on the left and right) when the spout 11 is fixed. easy.

  Further, the gusset bag 1 is manufactured because the upper edge of the left and right folding members 3a and 3b, the upper edge of the belt-like member 10, and the upper edge of the upper and lower body materials 2a and 2b are the same. Sometimes it is not necessary to heat the portions other than the upper ends of the front and back body materials 2a and 2b, so that it is possible to effectively prevent the occurrence of distortion and the like in the printing of the front and back body materials 2a and 2b.

  In addition, in the gusset bag body 1, the distance between the left and right folding members 3 a and 3 b is uniform in the vertical direction, and the distance is the width (left and right width) of the adhesive portion 15 (fixed portion) of the spout 11 to be attached. (See FIG. 10 etc.). Therefore, since the synthetic resin film located outside the left and right edges of the adhering portion 15 of the spout 11 is thick and difficult to bend, the spout-equipped gusset bag 21 spouts contents such as liquid filled inside. When pouring out from 11, the spout 11 does not wobble and the contents can be poured out smoothly.

[Example 2]
<Gazette bag manufacturing method>
13 to 19 show how the gusset bag is manufactured by the manufacturing method of the second embodiment. When the gusset bag body is manufactured by the manufacturing method of Example 2, as in the case of the manufacturing method of Example 1, first, as shown in FIG. 13A, a long strip-shaped synthetic resin film having a constant width is used. folded back left and right F _M, to form a folded portion 41, and thereafter, so as to extend over confronting end edges to each other in their folded portions 41 and 41, elongated separating prevention tape having a constant width By overlapping 44 and heat-sealing, the opposite edges of the folded portions 41, 41 are joined together.

In parallel with such a synthetic resin film for tethering facing the edge between the folded portions 41 and 41 of the F _M, as in the case of the method of Example 1, as FIG. 13 (b) , at predetermined intervals, bored a pair of substantially elliptical through-holes 45, 45 ... so as to pass through the base portion 42 and the folded portion 41 of the synthetic resin film _{F M.} In this case, the predetermined interval for forming the through holes 45, 45,... Is longer than the interval in the manufacturing method of Example 1 (approximately 480 mm interval).

Further, as such a synthetic resin film F _M bored through holes 45, 45 ..., (at approximately 480mm intervals) at predetermined intervals so as to be perpendicular to the longitudinal direction by cutting, gusset structure 43, 43... Are formed (gusset structure forming step). Incidentally, the cutting of such a synthetic resin film F _M is performed at the center of the bored positions of the through-holes 45, 45 ... in the longitudinal direction of the synthetic resin film F _M.

After that, as in the case of the manufacturing method of the first embodiment, as shown in FIG. 14, the gusset components 43, 43,... Formed as described above are fixed to the back side for forming the body material (approximately 480 mm width). Is placed on a long strip-shaped synthetic resin film F ₁ (first synthetic resin film) (placement step). Furthermore, so after placing the gusset structure 43 ... on the synthetic resin film F _1, as in the case of the method of Example 1, placed on the gusset structure 43 a central position in the longitudinal direction and the width direction of ..., by heat-sealing the synthetic resin film F ₁ so that the circular substantially 10 mm, the gusset structure 43 ... synthetic resin film F ₁ provisionally and stop, thereafter, as shown in FIG. 15, both sides are using the belt-shaped member 10 elongated with a heat-adhesive, to fix the gusset structure 43 ... synthetic resin film F _1. (Strip member fusion process).

Performed strip fusing step as described above, via the belt-shaped member 10, the after fixing the gusset structure 43 ... synthetic resin film F ₁ is the method of Example 2, the bottom A sandwiching step for forming the folded portion is performed. In such a pinching step, as shown in FIG. 16, a synthetic resin film outer edge of each secured to F ₁ Machi construct 43 ... (the side not heat-sealed strip edge) E Bend in a tapered shape. That is, the base part 42 of each gusset structure 43, 43,... Is folded in a mountain along two lines inclined 45 ° to the left and right from the center of the outer edge E, and at the same time, the gusset structures 43, 43,. The folded portions 41, 41 are mountain-folded along two lines inclined 45 ° to the left and right from the outer end of the joint portion. Furthermore, the folding | returning part 41 is along the straight line which connects the intersections ((gamma), (gamma)) of FIG. 15) of the two mountain fold lines of those base parts 42, and the two mountain fold lines of the folding | returning parts 41 and 41. , 41 is folded.

After that, a long strip-shaped synthetic resin film F ₃ , F ₃ (same as the synthetic resin film F ₁ ) having a predetermined width (total thickness 157 μm) for forming the lower folding portion and having a constant width (approximately 125 mm width). A third synthetic resin film made of a synthetic resin film is fed from both left and right outer sides of the synthetic resin film F ₁ using rollers R and R, and is folded in half (the heat-adhesive surface is on the outer side). In a state of being folded in two), the gusset components 43, 43,... Are continuously introduced onto the bent portion (tapered portion) of the base portion 42 at the edge of the outer edge.

Then, so after putting lead to synthetic resin film F ₃ on the bent portion of the base portion 42 when the outer edge of the gusset structure 43, 43 ... (tapered portion), as shown in FIG. 17 the bent portion when the outer edge of the folded portions 41 of the gusset structure 43, 43 ... (tapered portions), folded 180 °, is placed on the upper side of the synthetic resin film _{F 3} (such In addition, the synthetic resin film F ₃ folded in half by placing the folded portion at the outer edge of the folded portions 41, 41 of the gusset components 43, 43,... _On the upper side of the synthetic resin film F ₃ It is sandwiched between the outer edges of the gusset components 43, 43,.

As described above, when the outer edge of the gusset structure 43 .., after sandwiched synthetic resin film F ₃ which is two-folded in, as shown in FIG. 18, those synthetic resin film F _1, gusset structure on the 43, 43 ... and laminates made of a synthetic resin film _{F 3,} the synthetic resin film _F 1, _{F 3} with a predetermined thickness on the front side for the barrel material forming the same synthetic resin film (total thickness 157Myuemu) A long strip-shaped synthetic resin film F ₂ (second synthetic resin film) having a certain width (approximately 450 mm width) is covered so that the left and right edges coincide with the left and right edges of the synthetic resin film F _1. Let Then, after covering the synthetic resin film F ₂ in such a manner, the left and right edge portions of the two overlapping synthetic resin films F ₁ and F ₂ (the gusset components 43, 43... And the synthetic resin) the time outer edge) of the portion where the film F ₃ is sandwiched and heat-sealed at a constant width (approximately 13mm wide) (heat-sealed portion Hb).

Furthermore, in parallel with heat sealing the left and right edge portions of the _two synthetic resin films F ₁ and F ₂ that overlap each other, as shown in FIG. 19, the two synthetic resin films F ₁ and F ₂ , a central portion in the width direction sandwiched gusset structure 43 ... between F _2, heat sealed at a constant width (approximately 26mm wide) (heat-sealed portion Hc). In this way, two synthetic resin films F ₁ and F ₂ are heat sealed at the right and left edge portions and the center portions in the width direction of the gusset components 43, 43. film _F 1, _{F 2,} gusset structure 43, 43 ... and the synthetic resin film _F 3, consisting of _{F 3} synthetic resin film laminate 46 is formed.

And after forming the synthetic resin film laminated body 46 as mentioned above, the synthetic resin film laminated body 46 is cut | judged in a predetermined | prescribed aspect. That is, the synthetic resin film laminate 46 continuously formed in a long shape is formed between the two synthetic resin films F ₁ and F ₂ that overlap each other (that is, between the synthetic resin films F ₁ and F ₂ ). In the middle of the belt-like member 10 heat-sealed so as to cut through the gusset components 43, 43,... (Center of δ in FIG. 19), and the center heat in the width direction of the gusset components 43, 43,. Cut at approximately the center of the seal portion Hc (position of ε in FIG. 19) (cutting step). By cutting the synthetic resin film laminate 46 in such a manner, it is possible to continuously form gusset bag bodies 31, 31,... Having one side open, gussets on the left and right sides, and folds on the bottom. .

<Composition of gusset bag>
FIG. 20 shows the gusset bag body 31 formed as described above. Gusset bag body 31, the synthetic resin film F ₂ front of the barrel member 2a formed of a synthetic resin film F ₁ backside formed from the barrel member 2b, a synthetic resin film F _M right folding member 3a formed from , formation 3b, synthetic resin film F ₃ of the bottom portion which is formed from the folding member 4, and a belt-shaped member 10, in superimposed in a predetermined manner, by heat-sealing the prescribed portions, bag shape having an open top Has been.

In addition, at the lower end of the gusset bag body 31, the bottom folding material 4 is folded in two with a predetermined width (the same width as the folding materials 3a and 3b) between the front and back body materials 2a and 2b. (That is, a folded portion is formed). FIG. 20 shows the folding materials 3a and 3b on both the left and right sides and the folding material 4 on the bottom of the gusset bag body 31. FIG. The portions at the lower ends of the left and right folding members 3a and 3b are each bent obliquely inward so as to have an M-shaped cross section (vertical cross section), and inside the bent portions F and F, respectively. The left and right ends of the bottom folding material 4 formed by folding a horizontally long belt-like body into two are sandwiched. The folding material 4 at the bottom is formed of a synthetic resin film (synthetic resin film F ₃ ) similar to the body materials 2a and 2b and the folding materials 3a and 3b, and the back surface (thermal adhesive surface) faces outward. Folded in half. Further, the body materials 2a and 2b are overlapped on the outer sides of the left and right folding materials 3a and 3b and the bottom folding material 4 respectively.

  And in the part at the lower end of the left and right side seal portions 5, 5,... Of the gusset bag body 31, outside the bent portion F having the M-shaped cross section, the back surface of the front side body 2a and the folding material 3a, The back surface of 3b, and the back surface of the body member 2b on the back side and the back surfaces of the folding members 3a and 3b are fused together, and inside the bent portion F, the back surface of the folding materials 3a and 3b and the folding material on the bottom portion The back surfaces of 4 are fused together. Further, the bottom seal portions 15 and 15 are formed by heat-sealing the bottom edge portion of the bottom folding portion (the portion where the folding material 4 is sandwiched) into a belt shape having a constant height (about 8 mm). (See FIG. 20). In the bottom seal portions 15, 15, the back surface of the front-side body 2 a and the back surface of the folding material 4, and the back surface of the back-side body material 2 b and the back surface of the folding material 4 are fused together. Yes. In addition, the shape and structure of the upper part of the gusset bag body 31 are the same as those of the gusset bag body 1 manufactured by the manufacturing method of the first embodiment.

<How to use gusset bags>
The gusset bag body 31 of the second embodiment configured as described above can be used as a gusset bag with a spout by fixing the spout to the opening 9 at the upper end, similarly to the gusset bag body 1 of the first embodiment. it can. When the gusset bag 31 is filled with the contents as described above, the folded portions (the portions other than the upper end) of the folding materials 3a and 3b expand to form a rectangular side surface, and are folded near the bottom. The material 4 spreads to form a rectangular bottom. Therefore, the gusset bag 31 filled with the contents can be erected in an extremely stable state.

<Effects of gusset bag manufacturing method>
Similarly to the manufacturing method of the gusset bag body 1 of the first embodiment, the manufacturing method of the gusset bag body 31 of the second embodiment described above is the gusset structure forming step (a), the placing step (b), and the band-shaped member fusion. Since the step (c), the heat sealing step (d), and the cutting step (e) are included, the upper ends of the folding members 3a and 3b are fixed to the back side member 2b by the belt-like member 10 inside. Two bags 31 can be continuously manufactured at a time.

Moreover, in the manufacturing method of the gusset bag body 31 of Example 2 described above, the following sandwiching step (f) is performed between the band-shaped member fusion step (c) and the heat sealing step (d). The third synthetic resin film F ₂ sandwiched between the first synthetic resin film F ₁ and the second synthetic resin film F ₂ in a state of being folded in the sandwiching step (f) Since it becomes the folding material 4 at the bottom of the gusset bag body 31 and functions as a bottom surface when the contents are filled, the manufactured gusset bag body 31 can be made extremely highly self-supporting.
(F) The outer edges of the gusset components 43, 43,... That are not heat-sealed to the belt-like members 10, 10 are bent so as to have a bifurcated taper up and down, and the folded gussets the outer edge of the structure 43 ..., step sandwich sandwich the third synthetic resin film F ₃ of clamshell the long strip for folding portion forming the lower

<Example of change of manufacturing method of gusset bag>
The production method of the gusset bag according to the present invention is not limited to the aspect of the above embodiment, and the material and size (height, width, gusset width, etc.) of the synthetic resin film used, The configuration of the bottom seal portion, the side seal portion, the inclined seal portion and the like to be formed can be appropriately changed as necessary without departing from the spirit of the present invention. For example, the synthetic resin film used in the method for producing a gusset bag according to the present invention is a laminate of a nylon film, a polyester film and a polyethylene film (linear low density polyethylene film) as in the above embodiment. It is not limited to this, and a synthetic resin film made of another material may be laminated. In addition, as a synthetic resin film, when using a laminate of a nylon film, a polyester film and a polyethylene film (linear low density polyethylene film), the strength of the gusset bag body becomes good, Manufacture of a gusset bag body becomes easy.

  Further, the manufacturing method of the gusset bag according to the present invention is not limited to the method of providing the inclined seal portion in the vicinity of the outer edge of the gusset structure sandwiched between the two synthetic resin films as in the above embodiment, In the vicinity of the outer edge of the gusset structure sandwiched between the two synthetic resin films, a tapered seal portion is provided so that the width gradually increases from the inner side to the outer side (so that the front view is substantially triangular). Things may be used. Even when such a configuration is adopted, the spouted gusset bag that is finally formed spreads in the middle portion of the folded material folded in half when filled with liquid, and at the upper end portion of the tapered seal portion. Since the front and back body members are bent together with the left and right folding materials to form a horizontally long rectangular bottom surface, the lower part is substantially rectangular parallelepiped, so that it is possible to stand up in a stable state. .

  Further, the band-shaped members for fixing the gusset structure to the synthetic resin film for forming the body material on the back side are formed by laminating LLDPE films on the top and bottom of the nylon film (base film), respectively, as in the above embodiment. It is not limited to what consists of a synthetic resin film of a three-layer structure, It is also possible to change into what consists of a synthetic resin film formed with a different synthetic resin. Furthermore, the layer structure and thickness of the belt-shaped member can be appropriately changed as necessary. Further, the belt-like member is not limited to a horizontally long and simple tape-like member as in the above-described embodiment, and may be a member in which the vertical width of a predetermined portion is different or a through hole is provided.

  Also, in the gusset structure forming step, a method for connecting opposite edges (or part of the edges) of the left and right folded portions of the synthetic resin film (portions formed by folding the left and right sides of the synthetic resin film) Is not limited to a method of heat-sealing so as to straddle an edge facing a long anti-separation tape having thermal adhesiveness as in the above-described embodiment. A method of adhering a separation preventing member having a predetermined length (about 10 mm to 100 mm), or folding the left and right sides of the synthetic resin film so as to overlap each other with a certain width, and fusing or adhering the overlapping portions at predetermined intervals. Method, a method of folding the left and right sides of the synthetic resin film so as to overlap each other with a constant width, and ultrasonically sealing the overlapping portions at a predetermined interval or Folded back left and right synthetic resin film, the time each edge, to be folded portion (base portion), at predetermined intervals, or may be continuously changed in a method in which ultrasonic sealing.

  In addition, the method for manufacturing a gusset bag according to the present invention is limited to a method for tying a part of opposite edges of the left and right folded portions of the synthetic resin film in the gusset structure forming step as in the above embodiment. However, it is also possible to change the synthetic resin film so that the opposite edges of the left and right folded portions of the synthetic resin film are joined together. When adopting such a configuration, the left and right sides of the synthetic resin film are folded back so as to overlap each other with a constant width, and the part is fused or bonded as a whole, A method of fusing or adhering along the longitudinal direction so as to cover the entire opposite edges of the two can be employed. When such a configuration is adopted, in the band-shaped member fusion step, when the gusset structure is fixed to the first synthetic resin film for forming the body, there is a merit that the shape of the gusset structure is difficult to collapse. is there.

  Further, the manufacturing method of the gusset bag body according to the present invention is not limited to the method of fixing the gusset structure to the long band-shaped synthetic resin film for forming the body material on the back side, as in the above embodiment. A gusset component may be fixed to a long belt-shaped synthetic resin film for forming a body.

  Furthermore, the manufacturing method of the gusset bag body according to the present invention, as in the above-described embodiment, folds the left and right sides of a long strip-shaped synthetic resin film and cuts the synthetic resin film folded back to the right and left for each predetermined length. After forming the gusset structure, the gusset structure is placed on a long strip-shaped synthetic resin film (first synthetic resin film) for forming the body material on either the front or back side. It is not limited to the method of mounting at predetermined intervals so as to be orthogonal to each other, and after forming a gusset structure by folding the left and right sides of a long strip-shaped synthetic resin film, Are placed on the first synthetic resin film at predetermined intervals so that the longitudinal directions are orthogonal to each other, and thereafter, or substantially simultaneously with the placement, the gusset structure is formed. Long shape that folds right and left It is also possible to change the method in which cutting a synthetic resin film to a predetermined length.

  On the other hand, the method of using the gusset bag according to the present invention is not limited to the method of filling the contents from the extraction hole of the spout after the spout is fixed (fused) as in the above embodiment, It is also possible to change to a method of fixing the spout after filling the contents from the opening. According to such a method of use, it is possible to easily fill contents that are difficult to fill from spouts such as high-viscosity contents, and it is also possible to use one-piece spouts, spouts having a check valve function, etc. Become. Moreover, when using the usage method which fixes a spout after filling the content from an opening part in such a way, the manufacturing method of the gusset bag body which concerns on this invention has very large content (filling the content) The gusset bag body which is easy to fill the contents (because the nozzle does not interfere with the folding material) can be produced by a simple process with high yield, efficiency and low cost.

  Since the method for producing a gusset bag according to the present invention has excellent effects as described above, it is possible to efficiently and inexpensively produce a gusset bag for fixing a spout to form a gusset bag with a spout. This method can be suitably used.

1, 31 ··· Gazette bag body 2a, 2b · · Body 3a, 3b · · Folding material 4 · · Folding material at the bottom 9 · · Opening portion 10 · · Strip member 11 · · Spout 21 · · Gazette bag with spout F ₁ ··· First synthetic resin film F ₂ · · Second synthetic resin film 43 · · Machi component 46 · · Synthetic resin film laminate

Claims (3)

A spout with a synthetic resin film formed into a bag with gussets on the left and right sides of the front and back body, and an opening for inserting and fixing a spout made of synthetic resin in the approximate center of the head A manufacturing method for manufacturing a gusset bag body for forming a gusseted bag,
A method for producing a gusset bag for forming a gusset bag with a spout, comprising the following steps (a) to (e):
(A) A gusset structure forming step of forming a gusset structure by folding back the left and right sides of a long strip-shaped synthetic resin film. (B) The formed gusset structure is long for forming the body on either the front or back side. (C) a long belt-like member having a heat-sealing layer is placed on the first synthetic resin film in the form of a belt at a predetermined interval so that the longitudinal directions thereof are orthogonal to each other; A belt-like structure in which a plurality of gussets are fixed to the first synthetic resin film by heat-sealing so as to cross an intermediate position in the longitudinal direction of the plurality of gussets placed on the synthetic resin film Member fusion step (d) On the first synthetic resin film to which a plurality of gusset components are fixed, the second synthetic resin film in the form of a long belt for forming the other body is coated, The outer edge of the plurality of gusset components sandwiched and the central portion in the width direction Heat sealing step (e) to form a synthetic resin film laminate in which a plurality of gussets, a first synthetic resin film, and a second synthetic resin film are fixed by heat sealing with a certain width. ) The heat-bonded portion of the belt-like member that crosses the intermediate position in the longitudinal direction of the plurality of gusset structures sandwiched between the formed synthetic resin film laminate and the center in the width direction of the plurality of gusset structures sandwiched Cutting process for forming a gusset bag by cutting at the heat seal portion of   The gusset with a spout according to claim 1, wherein the gap between the gusset components placed on the first synthetic resin film in the placing step is made smaller than the width of the fixing portion of the attached spout. A method for producing a gusset bag for forming a bag. 3. The gusset bag according to claim 1, comprising the following step (f) between the band-shaped member fusion step (c) and the heat sealing step (d): 3. Manufacturing method.
(F) The outer edge of each gusset structure that is not heat-sealed to the belt-like member is bent so as to have a bifurcated tapered shape, and the outer edge of each folded gusset structure is formed. , A sandwiching step of sandwiching a long, strip-shaped third synthetic resin film for forming the lower folding part

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