JP2008100488A - Manufacturing method of packaging material for sandwich - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a packaging material for sandwich by which the packaging material for sandwich having a stable unsealing operability can be manufactured while suppressing the occurrence of defective products. <P>SOLUTION: This manufacturing method comprises an interior film feeding process, a seal line forming process, a film laminating process, and a packaging material forming process. In this case, in the interior film feeding process, a leaf paper-form interior film 3 is laminated on a first long-size film 20a'. In the seal line forming process, the first long-size film 20a' and the interior film 3 are sealed, and a plurality of seal lines SL1, SL2 and SL3 are formed in parallel. In the film laminating process, a second long-size film 20b' is laminated on the first long-size film 20a' on which the interior film 3 has been pasted. In the packaging material forming process, the laminated first and second long-size films 20a' and 20b' are sealed, and at the same time, or after the sealing, the laminated first and second long-size films 20a' and 20b' are cut to form the packaging material 1 for sandwich. In the interior film feeding process, the interior film 3 in which a folded back section has been formed at least at one end side is laminated on the first long-size film 20a. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method for manufacturing a sandwich packaging material for packaging a sandwich.

  As shown in FIGS. 15 (a) and 15 (b), as a packaging material for sandwiches for wrapping sandwiches, one end sides and two end portions of two stacked exterior films 200a and 200b are connected to each other. There is provided one including a formed bag body 200 and a sheet-like interior film 300 attached to one exterior film 200a through a plurality of seal lines SL formed in parallel ( For example, see Patent Document 1).

  In this sandwich packaging material 100 ′, a film that can be cut (cut) can be used for at least one of the exterior films 200 a, the seal line SL is formed along the cutting direction, and the opening gripping piece 220 is formed. Is formed at one end of one exterior film 200a.

  The sandwich packaging material 100 ′ having the above configuration is configured such that the exterior film 200 a is cut between the seal lines SL... By pulling the unsealing grip piece 220 from one end side toward the other end side. That is, the sandwich packaging material 100 ′ prevents the exterior film 200 a from being torn in an unspecified direction due to the presence of the seal line SL. 100 ′) can be cut in substantially one direction (along the seal line SL).

  As a result, the sandwich packaging material 100 ′ having the above-described configuration prevents the outer film 200 a from being split in an unspecified direction that causes the sandwich to entrain the mold and can be smoothly opened smoothly. It has become.

As shown in FIG. 16, the sandwich packaging material 100 ′ having the above configuration includes an interior film supply process for supplying the sheet-like interior film 300 so as to be superimposed on the first long film 200 a ′, and the first long film 200 a. The second long film 200b is added to the seal line forming step in which the inner film 300 is sealed to form a plurality of seal lines SL in parallel, and the first long film 200a 'in which the inner film 300 is sealed. And for the sandwich by cutting the first and second long films 200a 'and 200b' so as to include the interior film 300 simultaneously with the sealing or after sealing and in a substantially trapezoidal shape in plan view. It is manufactured through a packaging material forming process for forming the packaging material 100 ′.
JP 2006-8162 A

  By the way, the interior film 300 is a sheet-like and very thin film, so it is easy to bend. In particular, when a stretched film is used, the interior film 300 is curled when made into a sheet-like shape. When the film is supplied onto the first long film 200a ', the interior film 300 cannot be stably supplied, or the interior film 300 is folded and overlapped on the first long film 200a'. In some cases, there is a problem that the incidence of defective products in the manufacturing process is increased.

  Then, this invention makes it a subject to provide the manufacturing method of the packaging material for sandwiches which can manufacture the packaging material for sandwiches with stable openability, suppressing generation | occurrence | production of inferior goods in view of such a situation.

  The method for manufacturing a sandwich packaging material according to the present invention includes a bag body in which one end side and two side end portions of two stacked exterior films are connected to each other, and a plurality of seal lines formed in parallel. In order to produce a sandwich packaging material comprising a sheet-like interior film adhered to one exterior film via, and configured to cut and open at least between the seal lines of the exterior film An interior film supply process for supplying a leaf-shaped interior film so as to overlap the first long film; a seal line forming process for sealing the first long film and the interior film to form a plurality of seal lines in parallel; The film laminating step of superimposing the second long film on the first long film sealed with the interior film, and the superimposed first and second long films In the method for manufacturing a packaging material for sandwiches, including the packaging material forming step of producing the sandwich packaging material by cutting at the same time as sealing or after sealing, the interior film supply step includes at least a folded portion at one end side. The interior film formed with is provided so as to be superimposed on the first long film.

  According to the method for manufacturing a sandwich packaging material having the above configuration, in the interior film supply step, the interior film having the folded portion formed on at least one end side is supplied so as to be superimposed on the first long film. The interior film can be supplied on the first long film after being firm. That is, by folding at least one end portion of the interior film to form the folded portion, a bending ridge line is formed, so that rigidity can be imparted to the interior film. Thereby, when supplying an interior film on a 1st elongate film at an interior film supply process, an interior film does not bend carelessly and stable supply becomes possible. As a result, in the seal line forming step, the relative positional relationship between the interior film and the first long film can be set in an appropriate state and then both can be sealed. Therefore, it is possible to manufacture a sandwich packaging material while suppressing the occurrence of defective products.

  And since the several packaging line which connects one exterior film (1st elongate film) and an interior film is formed in the packaging material for sandwiches manufactured by this manufacturing method, when the exterior film is opened, Even if you try to tear in an unspecified direction, the presence of a seal line with higher rigidity compared to other areas (areas with only the exterior film) prevents the exterior film from tearing beyond the seal line. The exterior film can be cut along the line and can be opened stably.

  Further, the method further includes an interior film forming step of forming an interior film by cutting the third long film, and the interior film formation step folds the end of the third long film before cutting or the interior film after cutting. The folded portion may be formed on at least one end side of the interior film. In this way, it is possible to produce an interior film with increased rigidity capable of preventing bending and curling within a series of steps.

  In the interior film forming step, it is preferable to seal at least a part of the folded portion of the interior film and the region facing the folded portion. In this way, the folded part (end part) of the interior film does not rise, and the rigidity of the interior film can be further increased by the seal, and the interior film can be supplied more stably on the first long film. can do.

  Moreover, the manufacturing method of the packaging material for sandwiches according to the present invention includes a bag body in which one end sides and both side end portions of two stacked exterior films are connected, and a plurality of seals formed in parallel. To manufacture a sandwich packaging material comprising a sheet-like interior film adhered to one exterior film via a line, and configured to cut and open at least between the seal lines of the exterior film , An interior film supply process for supplying a sheet-like interior film so as to overlap the first long film, and a seal line formation in which a plurality of seal lines are formed in parallel by sealing the first long film and the interior film A process, a film laminating process for superimposing a second long film on a first long film sealed with an interior film, and a first and second long film superposed on each other In the method of manufacturing a packaging material for a sandwich including a packaging material forming step of producing the sandwich packaging material by cutting the film simultaneously with or after sealing the film, the interior film supplying step is performed on any one surface. The interior film to which the reinforcing film extending in the supply direction of the interior film or the direction intersecting the supply direction is attached is supplied so as to overlap the first long film. Here, “sticking” is intended to stick the reinforcing film to the interior film regardless of the means, for example, sticking with a heat seal, sticking with an adhesive, etc. It is a concept that includes

  According to the method for manufacturing a sandwich packaging material having the above-described configuration, the interior film in which the reinforcing film extending in the supply direction of the interior film or the direction intersecting the supply direction is attached to any one surface is the first long Since it supplies so that it may overlap with a film, after giving a firmness (rigidity) to interior film itself, it can supply on a 1st elongate film. That is, the thickness of the region where the reinforcing film is adhered is adhered to any one surface of the interior film by adhering the reinforcing film extending in the supply direction of the interior film or in the direction intersecting the supply direction. As a result, the rigidity can be imparted to the entire interior film. Thereby, when supplying an interior film on a 1st elongate film at an interior film supply process, an interior film does not bend carelessly and stable supply becomes possible. As a result, in the seal line forming step, the relative positional relationship between the interior film and the first long film can be set in an appropriate state and then both can be sealed. Therefore, it is possible to manufacture a sandwich packaging material while suppressing the occurrence of defective products.

  And since the several packaging line which connects one exterior film (1st elongate film) and an interior film is formed in the packaging material for sandwiches manufactured by this manufacturing method, when the exterior film is opened, Even if you try to tear in an unspecified direction, the presence of a seal line with higher rigidity compared to other areas (areas with only the exterior film) prevents the exterior film from tearing beyond the seal line. The exterior film can be cut along the line and can be opened stably.

  In addition, it further includes an interior film forming step of forming an interior film by cutting the third long film, and the interior film formation step is for reinforcing the strip in the third long film before cutting or the interior film after cutting. You may make it stick a film. In this way, it is possible to produce an interior film with increased rigidity capable of preventing bending and curling within a series of steps.

  As described above, according to the method for manufacturing a sandwich packaging material of the present invention, it is possible to produce an excellent effect that it is possible to manufacture a sandwich packaging material with stable openability while suppressing the occurrence of defective products.

  Hereinafter, a first embodiment of the present invention will be described with reference to the accompanying drawings.

  First, the sandwich packaging material manufactured by the manufacturing method according to the present embodiment will be described. The sandwich packaging material according to the present embodiment wraps a sandwich having a substantially right triangle when viewed from the side. As shown in FIGS. 1 (a) and 1 (b), two stacked exterior films 20a and 20b are stacked. One end side of each, and both ends of the bag body 2 are connected to each other and a plurality of seal lines SL1, SL2, SL3 formed in parallel, a sheet-like sheet adhered to one exterior film 20a And an interior film 3. The “seal line” is a linear or belt-like portion formed by heat sealing (welding) the exterior film 20a and the interior film 3, and a bonding portion between the exterior film 20a and the interior film 3 Means.

  As the two exterior films 20a and 20b, resin films having no cutting directionality due to their own characteristics and having heat-welding properties, that is, biaxially stretched resin films (OPP films) are employed. Each exterior film 20a, 20b is cut into a substantially trapezoidal shape in plan view, and the upper sides as one end are sealed and connected with a predetermined width, and the oblique sides are sealed with a predetermined width as side ends. It is connected. In other words, the bag body 2 is sealed on the three sides of the upper and oblique sides of the two exterior films 20a and 20b.

  More specifically, in the bag body 2 of the present embodiment, in addition to the above three-way seal, two exterior films 20a and 20b are sealed so as to straddle both oblique sides with a predetermined interval from the upper side to the bottom side. Has been. That is, the bag body 2 has a seal portion (hereinafter referred to as an intermediate seal portion) Sb substantially parallel to a belt-like seal portion (hereinafter referred to as an upper side seal portion) Sa in which the upper side portions are connected to the upper side seal portion Sa. Are formed at intervals. As a result, the bag body 2 has a space for accommodating the sandwich in a region surrounded by a pair of seal portions (hereinafter referred to as side seal portions) Sc, Sc and intermediate seal portions Sb connecting the side portions. In addition, an opening for inserting a sandwich is formed on the other end side of the exterior films 20a and 20b.

  Further, the bag body 2 is provided with an arc-shaped cut 21 in a region between the upper seal portion Sa and the intermediate seal portion Sb of one of the exterior films 20a, and the region defined by the cut 21 An opening grip piece 22 to be gripped at the time of opening is formed. That is, the notch 21 is formed in an arc shape so that the start point and the end point are located on the intermediate seal portion Sb side so that the start point and the end point are the cutting base points of the exterior film 20a, and the upper side seal portion Sa is convex. ing.

  The interior film 3 is made of a resin film having a cutting direction depending on its own characteristics. That is, the interior film 3 according to the present embodiment employs a resin film (OPP film) having a property that can be cut in one direction or substantially one direction by being uniaxially stretched or biaxially stretched. The interior film 3 is formed in a substantially rectangular shape in plan view, and folded portions 30a and 30b whose end portions are folded are formed at both ends in the longitudinal direction. The interior film 3 is overlapped with one exterior film 20a so that the longitudinal direction coincides with the vertical direction of the exterior film 20a having a trapezoidal shape, and the interior film 3 is spaced apart in the short direction. And a plurality of (three in this embodiment) seal lines SL1, SL2, and SL3 formed in parallel are attached to one exterior film 20a. That is, the interior film 3 is disposed on the exterior film 20a so that the folded portions 30a and 30b are positioned on the upper side and the bottom side of the exterior film 20a, and is exteriorized via the three seal lines SL1, SL2, and SL3. It is affixed on one surface (surface which becomes the inner surface of the bag body 2) of the film 20a.

  The interior film 3 is provided such that one end portion (one folded portion 30a) in the longitudinal direction is positioned on the upper side seal portion Sa side beyond the intermediate seal portion Sb of the bag body 2. That is, the bag main body 2 is heat-sealed with the two exterior films 20a and 20b through the interior film 3 at the intermediate seal portion Sb. In addition, since the interior film 3 which concerns on this embodiment does not have heat weldability on one side by a uniaxial stretching process, about the seal | sticker (adhesion) of the exterior films 20a and 20b and the interior film 3, it heat-bonds the interior film 3. After applying a part coat with a heat-sensitive adhesive to a non-sticky surface and at least one portion to be sealed of one surface of the exterior films 20a and 20b facing the surface, the exterior film is passed through the part coat. 20a, 20b and the interior film 3 are heat-sealed.

  In the present embodiment, as described above, one end portion of the interior film 3 is located on the upper side seal portion Sa side beyond the intermediate seal portion Sb. Therefore, the notch 21 of one exterior film 20a is also formed in the interior film 3. A notch 21 is provided that coincides with. That is, the unsealing and holding piece 22 is constituted by a region defined by the cutout 21 provided in the exterior film 20a and the interior film 3.

  The sandwich packaging material 1 according to the present embodiment is configured as described above. Next, sandwich packaging and opening of the sandwich packaging material 1 will be described. In order to wrap the sandwich with the sandwich packaging material 1, as shown in FIG. 2 (a), after sandwiching the sandwich from the opening at the other end of the bag body 2, the other end of the bag body 2 (exterior film 20a) It is completed by folding the part side.

  On the other hand, in order to open the sandwich packaging material 1, as shown in FIG. 2B, the opening grip piece 22 is gripped and then the opening grip piece 22 is pulled to the other end side of the bag body 2. If it does so, the start point and end point of the notch 21 which form the opening holding | grip piece 22 will become a cutting | disconnection start point of one exterior film 20a and the interior film 3, and will begin to cut | disconnect (break). Then, one exterior film 20a and the interior film 3 are torn to the other end side (bottom side) between the seal lines SL1, SL2, and SL3 beyond the intermediate seal portion Sb. In the present embodiment, since the interior film 3 has a cutting directionality, as described above, when the exterior film 20a and the interior film 3 start to tear, the exterior film 20a is guided to the interior film 3 in one direction ( Torn in the stretching direction).

  And in the case where the pulling with respect to the opening grip piece 22 is not uniform, even if the exterior film 20a and the interior film 3 start to tear away from the set direction, the seal line that connects the interior film 3 and the exterior film 20a The presence of SL1, SL2, and SL3 prevents the exterior film 20a from tearing beyond the seal lines SL1, SL2, and SL3. That is, since the seal lines SL1, SL2, and SL3 connecting the interior film 3 and the exterior film 20a are more rigid than the other portions, the exterior is also rigid even if the exterior film 20a and the like are torn in an unspecified direction. The sealing lines SL1, SL2, and SL3 prevent the tearing (cutting) from continuing in an unspecified direction, resulting in tearing along the sealing lines SL1, SL2, and SL3, and stable opening.

  Next, a method for manufacturing the sandwich packaging material 1 having the above configuration will be described. In addition, the 1st long film mentioned later and the 2nd long film are what becomes exterior film 20a, 20b, ie, the continuous body of exterior film 20a, 20b, and are each wound by roll shape, and are longitudinal Supplied by being pulled in the direction. Moreover, a 3rd elongate film is a continuous body of the interior film 3, and this is also wound by roll shape and is supplied by being pulled out to a longitudinal direction.

  In the method for manufacturing the sandwich packaging material 1 according to the present embodiment, as shown in FIG. 3, a sheet-like interior film 3 having folded portions 30a and 30b formed at least on one end side is overlaid on the first long film 20a ′. An interior film supply process for supplying the seal film, a seal line forming process for sealing the first long film 20a 'and the interior film 3 to form a plurality of seal lines SL1, SL2, SL3 in parallel; and an interior film 3 is laminated (laminated) with the second long film 20b ′ on the first long film 20a ′ sealed (attached), and the first and second long films 20a ′ overlapped. , 20b ′, and then cutting to produce the packaging material 1 for sandwich production. Furthermore, the manufacturing method according to the present embodiment includes an interior film forming step of forming the sheet-like interior film 3 by cutting the third long film 3 ′ into a predetermined length.

  The manufacturing method of the sandwich packaging material 1 according to the present embodiment will be described more specifically. First, the short side of the third long film 3 ′ is conveyed while the third long film 3 ′ is conveyed in the longitudinal direction. Both ends of the direction are folded to form the folded portions 30a and 30b (interior film forming step). The end of the third long film 3 ′ is folded back by the third long film 3 ′ being conveyed by guides (not shown) arranged on both sides of the conveyance (supply) path of the third long film 3 ′. This is done by guiding the end of the. Then, the folded portions 30a and 30b of the third long film 3 ′ and the region facing the folded portions 30a and 30b are entirely heat-sealed by the heat seal bars HS1 and HS1 to prevent the folded portions 30a and 30b from rising (interior film formation). Process). Thereafter, the third long film 3 'is cut into a predetermined length to form the interior film 3 having the folded portions 30a and 30b formed at both ends (interior film forming step). In the present embodiment, the third long film 3 ′ has a cutting directionality in the short direction (one direction) orthogonal to the longitudinal direction, and is cut at a predetermined length in the longitudinal direction as described above. Thus, the interior film 3 having a unidirectional cutting property between the folded portions 30a and 30b is formed (interior film forming step).

  Then, the interior film 3 on which the folded portions 30a and 30b are formed is supplied (laminated) on the first long film 20a '(interior film supply step). In the present embodiment, the drawing direction of the first long film 20a ′ and the drawing direction of the third long film 3 ′ (the direction of separating the interior film 3) are matched, and the third long film 3 ′ is The interior film 3 formed by cutting is laminated on the first long film 20a ′ so that the folded portions 30a and 30b are along the end of the first long film 20a ′ in the short direction. As described above, the interior film 3 has increased rigidity due to the formation of the folded portions 30a and 30b at both ends, so that free deformation is suppressed and the first long film 30a ′ is not bent inadvertently. It is supplied stably in an appropriate state.

  Then, the interior film 3 and the first long film 20a 'are heat-sealed (adhered) by the heat seal bars HS2, HS2, HS2. As described above, the sandwich packaging material 1 according to the present embodiment is attached to the one exterior film 20a and the interior film 3 via the three seal lines SL1, SL2, and SL3. The interior film 3 and the first long film 3 ′ are heat-sealed by the three heat seal bars HS2, HS2, HS2 arranged in parallel (seal line forming step). In the present embodiment, the inner film 3 is heat-sealed in a strip shape at both ends in the short-side direction and the center position in the short-side direction to form three seal lines SL1, SL2, and SL3 (seal Line formation process).

  Thereafter, a cut 21 ′ for forming the opening and holding piece 22 is made in the interior film 3 and the first long film 20 a ′ by the arc-shaped mold blade C. The notch 21 ′ is inserted into a portion that is a region between the upper seal part Sa and the intermediate seal part Sb formed in a later process.

  Then, the second long film 20b ′ is supplied in the longitudinal direction on the first long film 20a ′ so that the two long films 20a ′ and 20b ′ are laminated via the interior film 3. Film lamination process). That is, the second long film 20b 'is overlapped with the first long film 20a' to which the interior film 3 is sealed (adhered) so that the longitudinal directions thereof coincide with each other. Thereafter, the portions corresponding to the above-described upper side seal portion Sa, intermediate seal portion Sb, and side side seal portions Sc, Sc are sealed by the heat seal bars HS3, HS3, HS4, HS4.

  That is, it extends in the supply direction of the first and second long films 20a ′ and 20b ′, and is arranged at intervals in a direction orthogonal to the supply direction of the first and second long films 20a ′ and 20b ′. The two heat seal bars HS3 and HS3 seal the portions corresponding to the upper side seal portion Sa and the intermediate seal portion Sb and intersect the supply direction of the first and second long films 20a ′ and 20b ′. The portions corresponding to the side seal portions Sc and Sc are sealed by the two heat seal bars HS4 and HS4 that extend in the direction of the shape and are arranged in a square shape in plan view.

  In addition, in this embodiment, since the resin film which does not have heat-weldability on one side is employ | adopted as the interior film 3, the interior film 3 is made to oppose 1st long film 20a 'on one side without heat-weldability. When supplied, at least one surface of the third long film 3 ′ (interior film 3) having no heat-weldability and one surface of the first long film 20a ′ facing the surface. A heat-sensitive adhesive is preliminarily applied as a part coat to (the parts corresponding to the seal lines SL1, SL2, SL3 and the intermediate seal part Sb), and the interior film 3 and the first long film 20a ′ are applied through the part coat. The portions corresponding to the seal lines SL1, SL2, SL3 and the intermediate seal portion Sb are sealed. On the other hand, when the interior film 3 is supplied so that one surface without heat-weldability is opposed to the second long film 20b ′, the heat-weldability of the third long film 3 ′ (interior film 3). A heat-sensitive adhesive is preliminarily applied as a part coat on at least one of the surface having no surface and one surface of the second long film 20b ′ facing the surface (the portion corresponding to the intermediate seal portion Sb). The portion corresponding to the intermediate seal portion Sb between the interior film 3 and the second long film 20b ′ is sealed through the part coat.

  After that, the above-mentioned sandwich packaging material is cut by dividing the region sealed by the heat seal bars HS4 and HS4 arranged in the letter C along the extension direction of the sealed region. 1 is completed.

  As described above, according to the method for manufacturing the sandwich packaging material 1 according to the present embodiment, the interior film 3 in which the folded portions 30a and 30b are formed at both ends is superimposed on the first long film 20a ′. Since it is supplied, when supplying the interior film 3 onto the first long film 20a ′, the interior film 3 is not inadvertently bent and can be stably supplied, and the occurrence of defective products can be suppressed. Thus, the sandwich packaging material 1 can be manufactured.

  In addition, the end of the third long film 3 ′ before cutting is folded, and the folded portions 30a and 30b are formed at both ends in the short direction of the third long film 3 ′. Since the interior film 3 is produced by cutting 3 'and the interior film 3 is laminated on the first long film 20a', the interior film 3 having increased rigidity in a series of steps is produced. The sandwich packaging material 1 can be manufactured continuously.

  In particular, since the folded portions 30a, 30b and the region facing the folded portions 30a, 30b are sealed, the rigidity of the interior film 3 can be further increased, and the interior film 3 is supplied appropriately and stably. be able to.

  Since the interior film 3 has a cutting direction, the exterior film 20a is cut along the cutting direction of the interior film 3 at the time of opening even if a resin film having no cutting direction is adopted for the exterior film 20a. be able to. Further, since the seal lines SL1, SL2, and SL3 are formed along the cutting direction of the interior film 3, even if the exterior film 20a is torn in an unspecified direction, the seal line SL1 with increased rigidity is used. , SL2 and SL3 without tearing, the exterior film 20a can be smoothly cut (cut) and opened.

  Next, a second embodiment of the present invention will be described. In addition, about the structure which is the same as that of 1st embodiment, or equivalent, the same name and the same code | symbol shall be attached | subjected, and only a different point shall be demonstrated in detail.

  The sandwich packaging material 1 manufactured by the manufacturing method according to the present embodiment wraps a sandwich having a substantially right triangle shape in a side view as in the first embodiment, and FIGS. 4 (a) and 4 (b). As shown in FIG. 2, the bag body 2 in which one end sides and both end portions of the two exterior films 20a and 20b are connected to each other, and a plurality of seal lines SL1, SL2, and SL3 formed in parallel are provided. And a sheet-like interior film 3 adhered to one exterior film 20a.

  Similar to the first embodiment, the bag body 2 according to the present embodiment is formed by connecting one end side and both side ends of the two stacked exterior films 20a and 20b, and each exterior film 20a, 20b employs a resin film that has no cutting directionality due to its own characteristics and has heat-welding properties.

  Like the two exterior films 20a and 20b constituting the bag body 2, the interior film 3 employs a resin film that has no cutting directionality due to its own characteristics and has heat weldability. As in the first embodiment, the interior film 3 is formed in a substantially rectangular shape in plan view, and both end portions in the longitudinal direction are folded back to form folded portions 30a and 30b. The interior film 3 is overlapped with one exterior film 20a so that the longitudinal direction coincides with the vertical direction of the exterior film 20a having a trapezoidal shape, and the interior film 3 is spaced apart in the short direction. And a plurality of (three in this embodiment) seal lines SL1, SL2, and SL3 formed in parallel are attached to one exterior film 20a.

  The interior film 3 is provided with linear cuts (cuts by cutting or cuts by burning) 33 and 33 penetrating between the three seal lines SL1, SL2 and SL3. The linear cuts 33, 33 are formed on the other end of the exterior film 20 a starting from positions corresponding to the start and end points of the exterior film 20 a that defines the opening gripping piece 22 and the cut 21 provided in the interior film 3. It is formed in a straight line so as to extend. Also in the present embodiment, the interior film 3 is provided such that one end portion (one folded portion 30a) in the longitudinal direction is positioned on the upper side seal portion Sa side beyond the intermediate seal portion Sb of the bag body 2. Yes.

  The sandwich packaging material 1 according to the present embodiment is configured as described above. Next, sandwich packaging and opening of the sandwich packaging material 1 will be described. In order to wrap the sandwich with the sandwich packaging material 1, as shown in FIG. 5 (a), the bag body 2 is accommodated after the sandwich is received from the other end side opening of the bag body 2 as in the first embodiment. This is completed by folding the other end of the (exterior film 20a).

  On the other hand, in order to open the sandwich packaging material 1, as shown in FIG. 5B, the opening grip piece 22 is gripped and then the opening grip piece 22 is pulled to the other end side of the bag body 2. If it does so, the start point and end point of the notch 21 which form the opening holding | grip piece 22 will become a cutting | disconnection start point of one exterior film 20a and the interior film 3, and will begin to tear. If it does so, one exterior film 20a will be cut | disconnected by the other end side (bottom side) between seal line SL1, SL2, SL3 exceeding intermediate seal part Sb. In the present embodiment, since the linear cuts 33 and 33 are provided in the interior film 3 so as to correspond to the start point and the end point of the cut 21 that defines the opening gripping piece 22, the exterior film 20a is formed as described above. When it begins to tear, it will tear along the notches 33 and 33 of the interior film 3.

  Even when the pulling with respect to the opening gripping piece 22 is not uniform, even if the outer film 20a starts to tear away from the straight cut 33 (one direction) provided in the inner film 3, the inner film 3 and the outer film Due to the presence of the seal lines SL1, SL2, and SL3 connecting 20a, the exterior film 20a is prevented from tearing beyond the seal lines SL1, SL2, and SL3. That is, since the seal lines SL1, SL2, and SL3 connecting the interior film 3 and the exterior film 20a are more rigid than the other portions, the exterior is also rigid even if the exterior film 20a and the like are torn in an unspecified direction. The sealing lines SL1, SL2, and SL3 prevent the tearing (cutting) from continuing in an unspecified direction, resulting in tearing along the sealing lines SL1, SL2, and SL3, and stable opening.

  As shown in FIG. 6, the sandwich packaging material 1 having the above-described structure is obtained by inserting linear cuts 33 and 33 into the third long film 3 ′ or the cut interior film 3 in the interior film forming step. Similar to the first embodiment, it is manufactured through an interior film supply process, a seal line formation process, a film lamination process, and a packaging material formation process. Therefore, also in this embodiment, the same operation and effect as the first embodiment can be achieved.

  Next, a third embodiment of the present invention will be described. In addition, about the structure which is the same as that of 1st embodiment, or equivalent, the same name and the same code | symbol shall be attached | subjected, and only the difference will be demonstrated in detail.

  As shown in FIGS. 7A and 7B, the sandwich packaging material 1 manufactured by the manufacturing method according to the present embodiment is similar to the first and second embodiments in the bag body 2 and the interior film 3. And.

  In the bag body 2 according to the present embodiment, the bag body 2 according to the present embodiment employs a resin film that does not have a cutting directionality due to its own characteristics and has a heat-welding property on the two exterior films 20a and 20b. The auxiliary cutting lines 23 and 23 are provided on one of the exterior films 20a.

  For the auxiliary cutting lines 23, 23, a perforation, a half cut, or the like can be employed. In the present embodiment, a general perforation is employed. The auxiliary cutting lines 23 and 23 are formed on the seal lines SL1 and SL2 for attaching the interior film 3. Note that the sandwich packaging material 1 according to this embodiment is different from the first and second embodiments in that the interior film 3 is attached to one exterior film 20a via two seal lines SL1 and SL2. . Therefore, two auxiliary cutting lines 23 and 23 are also formed at intervals in the short direction of the interior film 3 corresponding to the seal lines SL1 and SL2.

  Like the two exterior films 20a and 20b constituting the bag body 2, the interior film 3 is a resin film having no cutting directionality due to its own characteristics and having heat-welding properties. Similar to the first embodiment, the interior film 3 is formed in a substantially rectangular shape in plan view, and both end portions in the longitudinal direction are folded back to form folded portions 30a and 30b. And the interior film 3 is spaced apart in the short direction of the interior film 3 in a state where the interior film 3 is superimposed on one exterior film 20a so that the longitudinal direction thereof coincides with the vertical direction of the exterior film 20a having a trapezoidal shape. It is stuck to one exterior film 20a through two seal lines SL1 and SL2 formed in parallel.

  The interior film 3 is at a position shifted from the cutting auxiliary lines 23 and 23 formed on the bag body 2 (exterior film 20a), and penetrates into the area where the two seal lines SL1 and SL2 are formed. Lined cuts 33 'and 33' (cuts by cutting or cuts by baking) are provided. The linear cuts 33 ′ and 33 ′ are positions corresponding to the start and end points of the cutout 21 provided in the exterior film 20 a and the interior film 3 that define the opening gripping piece 22, as in the second embodiment. Is formed linearly so as to extend to the other end side of the exterior film 20a. Also in the present embodiment, the interior film 3 is provided so that one end portion in the longitudinal direction is located on the upper side seal portion Sa side beyond the intermediate seal portion Sb of the bag body 2.

  The sandwich packaging material 1 according to the present embodiment is configured as described above. Next, sandwich packaging and opening of the sandwich packaging material 1 will be described. In order to wrap the sandwich with the sandwich packaging material 1, as shown in FIG. 8A, the sandwich body 2 is accommodated from the opening at the other end of the bag body 2 as in the first embodiment, and then the bag body 2. This is completed by folding the other end of the (exterior film 20a).

  As described above, the packaging material 1 for sandwiches is provided with cutting auxiliary lines 23 and 23 such as perforations on one exterior film 20a and linear cuts penetrating through the interior film 3. Since the auxiliary lines 23 and 23 and the cuts 33 ′ and 33 ′ are provided at positions shifted from each other and both are provided on the seal lines SL1 and SL2, the cutting auxiliary lines 23 and 23 and the cuts are provided. Moisture or the like does not enter through 33 'and 33', and the sandwich can be packaged in a good state.

  On the other hand, in order to open the sandwich packaging material 1, as shown in FIG. 8B, the opening grip piece 22 is gripped and then the opening grip piece 22 is pulled to the other end side of the bag body 2. If it does so, the start point and end point of the notch 21 which form the opening holding | grip piece 22 will become a cutting | disconnection start point of one exterior film 20a and the interior film 3, and will begin to tear. In the present embodiment, the interior film 3 is provided with the linear notches 33 ′ and 33 ′ so as to correspond to the start point and the end point of the notch 21 that defines the opening gripping piece 22, so that the exterior film as described above. When 20a begins to tear, it will tear along notches 33 'and 33' of exterior film 20a interior film 3.

  And in the case where the pulling with respect to the opening gripping piece 22 is not uniform, etc., even if the exterior film 20a starts to tear so as to deviate from the straight cuts 33 ′ and 33 ′ (one direction) provided in the interior film 3, The presence of the seal lines SL1 and SL2 connecting the interior film 3 and the exterior film 20a outside the lines 23 and 23 prevents the exterior film 20a from tearing beyond the seal lines SL1 and SL2. That is, since the auxiliary cutting lines 23 and 23 are provided on the seal lines SL1 and SL2 that connect the inner film 3 and the outer film 20a, cutting with the auxiliary cutting lines 23 and 23 is relatively easy. Since the outer side of the auxiliary cutting lines 23, 23 is more rigid than the other parts due to the seal between the exterior film 20a and the interior film 3, even if the exterior film 20a or the like is torn in an unspecified direction, it is rigid. A certain seal line SL1, SL2 prevents the cutting (cutting) in an unspecified direction from continuing, resulting in cutting along the seal lines SL1, SL2, and a stable opening.

  As shown in FIG. 9, the sandwich packaging material 1 having the above-described structure is provided with linear cuts 33 ′ and 33 ′ in the third long film 3 ′ or the cut interior film 3 in the interior film forming process, After inserting the auxiliary cutting lines 23 and 23 into the first long film 20a ′, it is manufactured through an interior film supplying process, a seal line forming process, a film laminating process, and a packaging material forming process as in the first embodiment. . Therefore, also in this embodiment, the same operation and effect as the first and second embodiments can be achieved.

  Next, a fourth embodiment of the present invention will be described. In addition, about the structure which is the same as that of 1st embodiment, or equivalent, it shall attach | subject the same name and the same code | symbol, and shall only demonstrate a different point.

  The sandwich packaging material 1 manufactured by the manufacturing method according to the present embodiment wraps a sandwich having a substantially right triangle shape in a side view as in the first embodiment. FIGS. 10 (a) and 10 (b). As shown in FIG. 2, a bag body 2 and an interior film 3 are provided.

  The bag body 2 according to the present embodiment employs a resin film that does not have a cutting directionality due to its own characteristics in the two exterior films 20a and 20b, and has a heat-welding property, that is, a biaxially stretched resin film. The other basic configuration is the same as that of the first embodiment.

  Like the two exterior films 20a and 20b constituting the bag body 2, the interior film 3 is a resin film having no thermal cutting direction due to its own characteristics and having a heat-weldability, that is, biaxially stretched. Resin film is used. Like the first embodiment, the interior film 3 is formed in a rectangular shape in plan view, and both end portions in the longitudinal direction are folded back to form folded portions 30a and 30b. The interior film 3 has a plurality (in this embodiment) formed in parallel at intervals in the short direction of the interior film 3 such that the longitudinal direction is the vertical direction of the exterior film 20a having a trapezoidal shape. Are attached to one exterior film 20a via three seal lines SL1, SL2 and SL3.

  The interior film 3 has holes 35 and 35 penetrating between the three seal lines SL1, SL2 and SL3. The holes 35 and 35 have a rectangular shape in plan view along the seal lines SL1, SL2, and SL3, and are formed by die cutting or punching. The holes 35 and 35 are formed to extend from the position corresponding to the start point and the end point of the cutout 21 provided in the exterior film 20a and the interior film 3 that define the opening gripping piece 22 to the other end side of the exterior film 20a. ing. Also in the present embodiment, the interior film 3 is provided so that one end portion in the longitudinal direction is located on the upper side seal portion Sa side beyond the intermediate seal portion Sb of the bag body 2.

  The sandwich packaging material 1 according to the present embodiment is configured as described above. Next, sandwich packaging and opening of the sandwich packaging material 1 will be described. In order to wrap the sandwich with the sandwich packaging material 1, as shown in FIG. 11 (a), the sandwich is received from the other end side opening of the bag body 2 as in the first to third embodiments. This is completed by folding the other end of the main body 2 (exterior film 20a).

  On the other hand, in order to open the sandwich packaging material 1, as shown in FIG. 11 (b), the opening gripping piece 22 is gripped and then the opening gripping piece 22 is pulled to the other end side of the bag body 2. If it does so, the start point and end point of the notch 21 which form the opening holding | grip piece 22 will become a cutting | disconnection start point of one exterior film 20a and the interior film 3, and will begin to tear. If it does so, one exterior film 20a will be cut | disconnected by the other end side (bottom side) between seal line SL1, SL2, SL3 exceeding intermediate seal part Sb. In this embodiment, since the holes 35 and 35 are provided between the seal lines SL1, SL2 and SL3 of the interior film 3, as described above, when the exterior film 20a starts to tear, a portion where only the exterior film 20a exists. Will be torn.

  And in the case where the pulling with respect to the opening grip piece 22 is not uniform, even if the exterior film 20a starts to tear away from the assumed cutting direction, the seal lines SL1, SL2, which connect the interior film 3 and the exterior film 20a The presence of SL3 prevents the exterior film 20a from tearing beyond the seal lines SL1, SL2, and SL3. That is, since the seal lines SL1, SL2, and SL3 connecting the interior film 3 and the exterior film 20a are more rigid than the other portions, the exterior is also rigid even if the exterior film 20a and the like are torn in an unspecified direction. The seal lines SL1, SL2, and SL3 prevent the continuation of tearing in an unspecified direction. As a result, the cut is performed along the seal lines SL1, SL2, and SL3, and stable opening is performed.

  As shown in FIG. 12, the sandwich packaging material 1 having the above-described structure is formed in the interior film forming step by forming the holes 35 and 35 in the interior film 3 and, similarly to the first embodiment, the interior film supply step, the seal It is manufactured through a line forming process, a film laminating process, and a packaging material forming process. Therefore, also in this embodiment, the same operation and effect as the first embodiment can be achieved.

  Next, a fifth embodiment of the present invention will be described. In addition, about the structure which is the same as that of 1st embodiment, or equivalent, the same name and the same code | symbol shall be attached | subjected, and only the difference will be demonstrated in detail.

  As shown in FIGS. 13A and 13B, the sandwich packaging material 1 according to the present embodiment has the same basic configuration as that of the first embodiment, and the bag body 2 (exterior films 20a and 20b). While a resin film having no cutting direction due to its own characteristics and having a heat-welding property is employed, a resin film having a cutting direction depending on its own characteristics is employed for the interior film 3. Then, the two exterior films 20a and 20b and the inner film 3 are heat-sealed in the same manner as in the first embodiment to form the sandwich packaging material 1.

  In the sandwich packaging material 1 according to this embodiment, reinforcing films 40 and 40 are attached to the inner film 3 in place of the folded portions 30a and 30b described in the first to fourth embodiments. The reinforcing films 40 and 40 are provided so as to encircle an area to be cut when the sandwich packaging material 1 is opened. In this embodiment, the folded portions 30a and 30b of the first embodiment. It is provided so that it may become the same arrangement | positioning. That is, the reinforcing films 40 are attached to both ends in the longitudinal direction of the interior film 3 having a substantially rectangular shape. The reinforcing films 40 and 40 according to the present embodiment have a strip shape, and the inner film is adjusted so that the longitudinal direction thereof matches the short direction of the inner film 3 (the direction corresponding to the supply direction of the inner film 3 at the time of manufacture). 3 is attached to substantially the entire length in the short direction.

  In the sandwich packaging material 1 according to the present embodiment, one reinforcing film 40 is positioned on the upper end side beyond the intermediate seal portion Sb, and the other reinforcing film 40 is positioned on the lower end side. Similarly, the reinforcing films 40 and 40 for increasing the rigidity do not exist in the regions (opened regions) where the seal lines SL1, SL2, and SL3 are formed.

  As described above, the sandwich packaging material 1 having the above-described structure is the same as that of the first embodiment in which the exterior films 20a and 20b and the interior film 3 are heat-sealed in the same manner. The unsealed state is the same as in the embodiment.

  As shown in FIG. 14, the sandwich packaging material 1 having the above-described structure is the same as the first embodiment, after the belt-like reinforcing films 40 and 40 are attached to the interior film 3 in the interior film forming step. It is manufactured through a supply process, a seal line formation process, a film lamination process, and a packaging material formation process.

  Here, the inner film forming step will be specifically described. While the third long film 3 ′ is conveyed in the longitudinal direction, the long tape 40 is formed on both ends of the third long film 3 ′ in the short direction. 'Is supplied. That is, the two long tapes 40 'and 40 are superposed on both ends of the third long film 3' while the long tape 40 'and the third long film 3' are conveyed in the same direction. Then, the long tape 40 'is adhered to the third long film 3'. The long tape 40 ′ is a continuous film of the reinforcing film 40, that is, the reinforcing film 40, wound in a roll shape, and supplied by being drawn out in the longitudinal direction.

  In the present embodiment, since the long tape 40 ′ has a heat-melting property, the long tape 40 ′ and the third long film 3 ′ are heat-welded (heated) with the heat seal bar HS 1. Sealing) (interior film forming process). Thereafter, the third long film 3 ′ is cut into a predetermined length, and the interior film 3 with the reinforcing film 40 attached to both ends is formed (interior film forming step). In the present embodiment, the third long film 3 ′ has a cutting directionality in the short direction (one direction) orthogonal to the longitudinal direction, and is cut at a predetermined length in the longitudinal direction as described above. Thus, the interior film 3 having a unidirectional cutting property between the reinforcing films 40 and 40 is formed (interior film forming step).

  Then, the interior film 3 on which the reinforcing film 40 is adhered is supplied (laminated) on the first long film 20a '(interior film supply step). Also in the present embodiment, the drawing direction of the first long film 20a ′ and the drawing direction of the third long film 3 ′ (the direction in which the interior film 3 is separated) are matched, and the third long film 3 ′. The interior film 3 formed by cutting is laminated on the first long film 20a ′ such that the reinforcing film 40 is along the end of the first long film 20a ′ in the short direction. As described above, since the rigidity of the interior film 3 is increased by sticking the reinforcing films 40 and 40 to both ends, free deformation is suppressed and the first long film is not bent unexpectedly. 30a 'is supplied stably in an appropriate state.

  Thereafter, similarly to the first embodiment, the sandwich packaging material 1 is completed through a seal line forming process, a film laminating process, and a packaging material forming process.

  As mentioned above, according to the manufacturing method of the packaging material 1 for sandwiches according to the present embodiment, the reinforcing film 40 extending in the supply direction of the interior film 3 is adhered to one surface in the interior film supply step. Since the interior film 3 is supplied so as to overlap the first long film 20 ′, the interior film 3 is supplied onto the first long film 20a ′ as in the first to fourth embodiments. At this time, the interior film 3 is not carelessly bent and can be supplied stably, and the sandwich packaging material 1 can be manufactured while suppressing the occurrence of defective products.

  Further, as in the first embodiment, since the interior film 3 has a cutting direction, even when a resin film having no cutting direction is adopted for the exterior film 20a, the exterior film 20a is attached to the interior film 3 at the time of opening. Can be cut along the cutting direction. Furthermore, since the seal lines SL1, SL2, and SL3 are formed along the cutting direction of the interior film 3, even if the exterior film 20a is torn in an unspecified direction, the seal line SL1 with increased rigidity is provided. , SL2 and SL3 without tearing, the exterior film 20a can be smoothly cut (cut) and opened.

  In addition, the manufacturing method of the packaging material for sandwiches of this invention is not limited to any said embodiment, Of course, various changes can be added within the range which does not deviate from the summary of this invention.

  In said 1st thru | or 4th embodiment, although it was made to produce the interior film 3 in which the folding | turning part 30a, 30b was formed in both ends within the manufacturing process of the packaging material 1 for sandwiches, it is not limited to this. For example, when the sheet-like interior film 3 in which the folded portions 30a and 30b are formed is prepared in advance (separately) and the sandwich packaging material 1 is manufactured, the interior on the first long film 20a ′ is produced. The film 3 may be supplied so as to overlap.

  Moreover, in 5th embodiment, although it was made to produce the interior film 3 by which the films 40 and 40 for reinforcement were stuck to both ends within the manufacturing process of the packaging material 1 for sandwiches, it is limited to this. Instead, for example, when the sheet-like interior film 3 to which the reinforcing film 40 is stuck is prepared in advance (separately) and the sandwich packaging material 1 is manufactured, it is applied on the first long film 20a ′. The interior film 3 may be supplied so as to overlap.

  In the first to fourth embodiments, when the sheet-like interior film 3 is produced, after the end of the third long film 3 ′ is folded to form the folded portions 30a and 30b, the third long film 3 ′ is formed. The sheet 3 ′ is cut to produce the sheet-like interior film 3. However, the present invention is not limited to this. For example, the third long film 3 ′ is cut to a predetermined length to obtain a sheet-like interior film 3. After producing the film, the end portion of the sheet-like film may be folded to form the folded portions 30a and 30b to form the interior film 3. In addition, the folded portions 30a and 30b of the interior film 3 may be positioned on one exterior film 20a side or on the other exterior film 20b side in a state of being overlapped with the exterior films 20a and 20b. Good. That is, the folded portions 30a and 30b are formed in order to increase the rigidity of the interior film 3 and supply the interior film 3 stably and appropriately, and therefore the direction of the folded portions 30a and 30b is particularly limited. is not.

  In the fifth embodiment, in producing the sheet-like interior film 3, the long tape 40 ′ is attached to the end of the third long film 3 ′, and then the third long film 3. However, the present invention is not limited to this. For example, the third long film 3 ′ is cut to a predetermined length to obtain a sheet-like film. After the production, the belt-like reinforcing films 40 and 40 may be attached to the end of the sheet-like film to form the interior film 3. Further, the reinforcing film 40 of the interior film 3 may be positioned on the one exterior film 20a side or on the other exterior film 20b side in a state of being superimposed on the exterior films 20a and 20b. . That is, the reinforcing film 40 is stuck in order to increase the rigidity of the interior film 3 and supply the interior film 3 stably and appropriately, as in the folded portions 30a and 30b of the first to fourth embodiments. Therefore, the direction of the reinforcing films 40 and 40 is not particularly limited.

  In the first to fourth embodiments, the folded portions 30a and 30b of the interior film 3 and the regions facing the whole are sealed (all regions), but is not limited thereto. For example, the end portions of the interior film 3 may be simply folded back to be folded portions 30a and 30b. Even if it does in this way, since rigidity increases with the bending ridgeline formed in connection with formation of the folding | turning parts 30a and 30b, the interior film 3 can be supplied smoothly and appropriately. However, in order to reliably prevent the folded portions 30a and 30b from rising up, it is preferable to seal the opposing regions as in the above embodiment. Moreover, when sealing the area | region which opposes in this way, it is not limited to the form which sticks all the area | regions of an opposing area | region, For example, it may be made to stick part of opposing areas | regions together. Good.

  In said 1st thru | or 4th embodiment, the folding | returning part 30a, 30b of the interior film 3 is the aspect (the bending ridgeline by the folding | returning part 30a, 30b is orthogonal to seal line SL1, SL2, SL3 along the upper side and the bottom side of the exterior film 20a. However, the present invention is not limited to this. For example, the interior film 3 is arranged so that the folded portions 30a, 30b are in parallel with the seal lines SL1, SL2, SL3. The film 3 may be supplied by being laminated on the first long film 20a ′. That is, from the viewpoint of supplying the interior film 3 appropriately and stably, the purpose can be achieved by forming the folded portions 30a and 30b to increase the rigidity of the interior film 3, and therefore the exterior film 20a at the time of opening. The arrangement of the interior film 3 with respect to the exterior film 20a can be appropriately changed on the assumption that the folded portions 30a and 30b do not interfere with the cutting (splitting).

  In the first to fourth embodiments, the folded portions 30a and 30b are formed on both end sides (both ends in the longitudinal direction) of the interior film 3. However, the present invention is not limited to this. For example, the interior film 3 may be formed with folded portions 30a and 30b on one end side. Thus, even if the folded portions 30a and 30b are formed at one end, the rigidity of the interior film 3 can be increased, and an appropriate and stable supply is realized. However, if the folded portions 30a and 30b are provided at both ends of the interior film 3 as in the above embodiment, the rigidity of the interior film 3 is further increased, and therefore it is preferable to provide the folded portions 30a and 30b at both ends. Needless to say.

  In the fifth embodiment, the reinforcing films 40 and 40 are attached to both end sides (both ends in the longitudinal direction) of the interior film 3. However, the present invention is not limited to this. For example, the interior film The belt-like reinforcing film 40 may be attached so as to extend in the short direction of the interior film 3 at one end of the part 3 or at one place other than the end. Even if it does in this way, the rigidity of interior film 3 can be raised and proper and stable supply is realized. In the fifth embodiment, the reinforcing film 40 is provided (supplied) so as to extend in the supply direction of the interior film 3. For example, the reinforcing film 40 (long tape 40 ') is provided as the interior film. 3 (first long film 30 ′) may be provided (supplied) so as to extend in a direction intersecting with the supply direction of the first (long film 30 ′). That is, the reinforcing film 40 may be supplied along the cutting direction of the interior film 3. Even in this case, the reinforcing film 40 may be provided at one or more places. However, in order to increase the rigidity of the interior film 3, it is preferable to provide the reinforcing film 40 at two or more locations, and the reinforcing film 40 is formed by cutting the exterior film 20a and the interior film 3 (the sandwich packaging material 1). Needless to say, it is preferable to use an arrangement that does not hinder unsealing.

  In the packaging material forming process of the first to fifth embodiments, the first long film 20a ′ and the second long film 20b ′ to which the interior film 3 is attached via the seal lines SL1, SL2, and SL3. In a superposed state, the portions corresponding to the upper side seal part Sa, the intermediate seal part Sb, and the side side seal part Sc are sealed with the heat seal bars HS2, HS2, HS3, HS3, and then cut into a substantially trapezoidal cross section. Although the packaging material for sandwiches is prepared, the present invention is not limited to this. For example, portions corresponding to the upper side seal portion Sa and the side seal portions Sc of the first and second long films 20b that are overlapped with each other. The portion corresponding to the intermediate seal portion Sb may be sealed with the heat seal bar HS2 after the fusing or before the fusing. That is, the portions corresponding to one end side and both side ends of the two exterior films 20a and 20b may be melted and cut simultaneously with the seal.

  In the first to fifth embodiments, the upper side seal portion Sa and the intermediate seal portion Sb are formed as the seals on one end side of the two exterior films 20a and 20b, but one end side of the exterior films 20a and 20b. This seal may be only the intermediate seal portion Sb. That is, even if the notch 21 for forming the opening gripping piece 22 is provided, an area where the notch 21 is formed and an area where the sandwich is accommodated so that the notch 21 and the internal area accommodating the sandwich do not communicate with each other. What is necessary is just to seal so that it may partition.

  In the first and fifth embodiments described above, a resin film having a cutting direction is adopted for the third long film 3 ′. However, the present invention is not limited to this, for example, the second to fourth embodiments. You may make it employ | adopt what does not have cutting directionality also about 3rd elongate film 3 'like a form. Even if it does in this way, in order to cut and open the exterior film 20a between the seal lines SL1, SL2, and SL3, even if the cutting direction tends to go in an unspecified direction, it is corrected by the presence of the seal lines SL1, SL2, and SL3. And can be opened along the seal lines SL1, SL2, and SL3. On the other hand, in the second to fourth embodiments, a resin film having a cutting direction may be adopted for each of the first to third long films 20a ', 20b', 3 '. However, when a resin film having a cutting direction is employed (when a film having no heat-welding property is employed), it is necessary to seal the part to be sealed after part-coating a heat-sensitive adhesive.

  In said 1st, 3rd, 4th, and 5th embodiment, one exterior film 20a and interior film 3 are stuck via three seal lines SL1, SL2, and SL3, and in 2nd embodiment. The one exterior film 20a and the interior film 3 are attached via the two seal lines SL1 and SL2. However, the present invention is not limited to this, and the one exterior film 20a and the interior film 3 May be attached via a plurality of (at least two) seal lines SL1, SL2, and any structure may be used as long as the exterior film 20a can be cut (removed) between the seal lines SL1, SL2, SL3.

  Moreover, in said 1st thru | or 5th embodiment, while attaching the interior film 3 with respect to one exterior film 20a opened, it is set as a laminated state, On the other hand, the other exterior film 20c is made into a single layer. However, the present invention is not limited to this. For example, the interior film 3 is adhered to one exterior film 20a, and a transparent protective film is adhered to the other exterior film 20b to protect the sandwich. You may do it.

  In the second and fourth embodiments described above, the exterior films 20a, 20b and the interior film 3 that do not have a cutting direction due to their own characteristics are used, and only the interior film 3 has the cuts 33 ', 33' and the holes 35, 35, for example, in this type of form, for example, a cutting auxiliary line is provided on one of the exterior films 20a so as to correspond to the cuts 33 ′ and the holes 35 of the interior film 3. Of course. However, in consideration of the inflow of moisture into the sandwich packaging material 1, it is preferable to employ a non-penetrating half cut or the like for the auxiliary cutting line.

  In the fifth embodiment, the reinforcing film 40 is adhered to the exterior film 20a by heat-sealing. However, the present invention is not limited to this. For example, the reinforcing film is provided via an adhesive. 40 may be stuck, or an adhesive tape or an adhesive tape may be adopted for the reinforcing film 40 and the adhesive film or adhesive may be stuck. That is, various means can be employed as means for attaching the reinforcing film 40 to the exterior film 20a.

  In the fifth embodiment, when producing the sheet-like interior film 3, a separately prepared long tape 40 'is attached to the end of the third long film 3'. For example, a strip-shaped film is prepared by cutting the end of the third long film 3 ′ in the longitudinal direction (the transport direction of the third long film 3 ′), and the strip-shaped film, for example. May be attached to the end of the remaining portion of the third long film 3 ′ as a long tape 3 ′. That is, with respect to a single third long film 3 ′, both ends of the third long film 3 ′ are attached to a long tape 40 ′ (reinforcement) in a direction orthogonal to the conveyance direction of the third long film 3 ′. The film 40) is set as an area, and the remaining portion is set as an area to be the third long film 3 '(interior film 3) of the fifth embodiment, so that each area is divided. The long film 3 ′ may be cut in the longitudinal direction, and the region to be the long tape 40 ′ may be stuck to the end of the region to be the interior film 3. In this case, the region to be the long tape 40 'may be reversed with reference to the cutting line and overlapped and pasted on the third long film 3', or the strip-shaped film may be attached to the third long film. You may make it slide on the direction orthogonal to the longitudinal direction of film 3 ', and may overlap | superpose and stick on 3rd elongate film 3'.

It is explanatory drawing of the packaging material for sandwiches manufactured by the manufacturing method which concerns on 1st embodiment of this invention, Comprising: (a) shows the front view of the packaging material for sandwiches, (b) is the method material for sandwiches The longitudinal cross-sectional view of is shown. It is explanatory drawing for demonstrating the packaging state by the packaging material for sandwiches which concerns on 1st embodiment, and an open state, Comprising: (a) shows the perspective view of a packaging state, (b) is the perspective view of an open state The figure is shown. Explanatory drawing of the manufacturing method which concerns on 1st embodiment is shown. It is explanatory drawing of the packaging material for sandwiches manufactured by the manufacturing method which concerns on 2nd embodiment of this invention, Comprising: (a) shows the front view of the packaging material for sandwiches, (b) is the method material for sandwiches The longitudinal cross-sectional view of is shown. It is explanatory drawing for demonstrating the packaging state and opening state by the packaging material for sandwiches concerning 2nd embodiment, Comprising: (a) shows the perspective view of a packaging state, (b) is the perspective view of an opening state. The figure is shown. Explanatory drawing of the manufacturing method which concerns on 2nd embodiment is shown. It is explanatory drawing of the packaging material for sandwiches manufactured by the manufacturing method which concerns on 3rd embodiment of this invention, Comprising: (a) shows the front view of the packaging material for sandwiches, (b) is the method material for sandwiches The longitudinal cross-sectional view of is shown. It is explanatory drawing for demonstrating the packaging state by the packaging material for sandwiches which concerns on 3rd embodiment, and an open state, Comprising: (a) shows the perspective view of a packaging state, (b) is the perspective view of an open state The figure is shown. Explanatory drawing of the manufacturing method which concerns on 3rd embodiment is shown. It is explanatory drawing of the packaging material for sandwiches manufactured by the manufacturing method which concerns on 4th embodiment of this invention, Comprising: (a) shows the front view of the packaging material for sandwiches, (b) is the method material for sandwiches The longitudinal cross-sectional view of is shown. It is explanatory drawing for demonstrating the packaging state and opening state by the packaging material for sandwiches concerning 4th embodiment, Comprising: (a) shows the perspective view of a packaging state, (b) is the perspective view of an opening state The figure is shown. Explanatory drawing of the manufacturing method which concerns on 4th embodiment is shown. It is explanatory drawing of the packaging material for sandwiches manufactured by the manufacturing method which concerns on 5th embodiment of this invention, Comprising: (a) shows the front view of the packaging material for sandwiches, (b) is the method material for sandwiches The longitudinal cross-sectional view of is shown. Explanatory drawing of the manufacturing method which concerns on 5th embodiment is shown. It is explanatory drawing of the packaging material for sandwiches manufactured by the conventional manufacturing method, (a) shows the front view of the packaging material for sandwiches, (b) shows the longitudinal cross-sectional view of the method material for sandwiches. An explanatory view of a conventional manufacturing method is shown.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Sandwich packaging material, 2 ... Bag main body, 3 ... Interior film, 3 '... 3rd long film, 20a, 20b ... Exterior film, 20a' ... 1st long film, 20b '... 2nd long film , 22 ... opening gripping piece, 23 ... cutting auxiliary line, 30a, 30b ... folded portion, 35 ... hole, 40 ... reinforcing film, 40 '... long tape, C ... mold blade, HS1, HS2, HS3, HS4 ... heat seal bar, Sa ... upper side seal part, Sb ... intermediate seal part, Sc, Sc ... side side seal part, SL1, SL2, SL3 ... seal line

Claims (5)

  A sheet body attached to one exterior film through a plurality of seal lines formed in parallel, and a bag body in which one end side and both end portions of the two exterior films are connected to each other. The sheet-like interior film is stacked on the first long film so as to produce a sandwich packaging material that is configured to cut and open between the seal lines of at least one exterior film. An inner film supply step for supplying the inner film, a seal line forming step for sealing the first long film and the inner film to form a plurality of seal lines in parallel, and a first long film with the inner film sealed The film laminating step for superimposing the second long film, and the first and second long films overlapped with each other at the same time as sealing or after cutting In the method for producing a sandwich packaging material including a packaging material forming step for producing a sandwich packaging material, the interior film supply step uses an interior film having a folded portion formed at least on one end side as a first long film. A method for producing a sandwich packaging material, wherein the sandwich packaging materials are supplied so as to overlap each other.   It further includes an interior film forming step of cutting the third long film to form an interior film, and the interior film forming step wraps the end of the third long film before cutting or the interior film after cutting, The method for producing a sandwich packaging material according to claim 1, wherein a folded portion is formed on at least one end side of the film.   The method for producing a packaging material for a sandwich according to claim 2, wherein the interior film forming step seals at least a part of the folded portion of the interior film and the region facing the folded portion.   A sheet body attached to one exterior film via a plurality of seal lines formed in parallel with a bag body in which one end side and both end portions of the two exterior films are connected to each other. The sheet-like interior film is stacked on the first long film so as to produce a sandwich packaging material that is configured to cut and open between the seal lines of at least one exterior film. An inner film supply step for supplying the inner film, a seal line forming step for sealing the first long film and the inner film to form a plurality of seal lines in parallel, and a first long film with the inner film sealed The film laminating step for superimposing the second long film, and the first and second long films overlapped with each other at the same time as sealing or after cutting In the method for manufacturing a sandwich packaging material including a packaging material forming step for producing a sandwich packaging material, the interior film supply step includes a supply direction of the interior film on one surface or a direction intersecting the supply direction. A method for producing a packaging material for sandwiches, characterized in that an interior film having a reinforcing film attached to is attached so as to be superimposed on a first long film.   It further includes an interior film forming step of cutting the third long film to form an interior film, and the interior film forming step includes applying a strip-shaped reinforcing film to the third long film before cutting or the interior film after cutting. The manufacturing method of the packaging material for sandwiches of Claim 4 to stick.

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