JP2006008168A - Package and easily unsealable packaging material with flap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packaging material or the like preventing contents from scattering even if a package of confectionery is left unsealed on a table when consuming. <P>SOLUTION: The packaging material consists of a laminate film having a base material layer and a hot-gluing resin layer and keeps the laminate film opened at least in one side of the periphery. A body for storing contents, an unsealing port provided on the body, and an approximately planar flap covering the unsealing port are provided. The flap has one of ends serving as a connecting end with the body and the other end serving as an unsealing tab end. One of ends has at least one of both sides hot-glued to the body over a predetermined length in the unsealing direction of the flap. In addition, the flap is easily unsealably glued to the body in the vicinity of the other end along the unsealing port. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a packaging material made of a plastic film and a packaging body using the same, and more specifically, products such as hay, beans, snacks and the like that are taken out from the packaging and consumed in relatively small amounts. The present invention relates to a packaging material suitable for packaging and a package using the packaging material.

  For products such as snacks, packaging using plastic film subdivided for the general consumer requires the usual four-way because the packaging requires a relatively small capacity and the packaging process is relatively simple. Seal bags and three-way seal bags are often used. However, in such a package, the contents are easily spilled from the opening of the package once the upper part of the package is opened and then left on a desk or the like.

In addition, in plastic film packaging materials used for packaging paper envelopes, etc., a flap is formed by extending the surface film of the opening of the packaging material from the opening to the top, and the flap is covered with a lid. A form in which the opening is sealed by bonding the end of the flap after bending is also known. Furthermore, what was devised so that it can be resealed after opening once is also disclosed (for example, refer patent document 1). Such packaging materials are not used for packaging snack snacks because of their poor sealing properties, but even if snack snacks are packaged, if they are left unopened on the desk, the contents It is the same as above that spills easily.
JP 2003-341694 A

  The present invention provides a packaging material and a packaging body using the packaging material that are less likely to spill or jump out even if the consumer consumes snacks and the like of the packaging body even if left on a desk or the like after opening. The issue is to provide.

  A first aspect of the present invention is a packaging material that is composed of a laminated film having at least a base material layer and a heat-adhesive resin layer, and at least one of the peripheral portions of the laminated film is open, and contains contents A main body portion, an opening provided in the main body portion, and a substantially flat flap covering the opening, the flap having one end serving as a connection end to the main body portion, and an opening And the other end of the one end is thermally bonded to the main body over a certain length in the opening direction of the flap, and The flap is a packaging material characterized in that the flap is adhered to the main body portion so as to be easily opened in the vicinity of the other end portion along the opening.

  A second aspect of the present invention is a packaging material composed of a laminated film having at least a base material layer and a heat-adhesive resin layer, wherein one of the peripheral edges of the laminated film is opened, and contains contents. A main body, an opening provided in the main body, and a substantially flat flap covering the opening, the flap being connected to the main body, one end, and an opening And the other end of the one end is thermally bonded to the main body over a certain length in the opening direction of the flap, and the flap is In the vicinity of the other end along the opening, the packaging material is easily bonded to the main body.

  3rd of this invention is a packaging material which is comprised with the laminated | multilayer film which has a base material layer and a thermoadhesive resin layer at least, and one side of the peripheral part of the said laminated | multilayer film is open | released, Comprising: A main body, an opening provided in the main body, and a substantially flat flap covering the opening, the flap being connected to the main body, one end, and an opening And the other end portion is thermally bonded to the main body portion over a certain length in the opening direction of the flap, and the other end portion is the peripheral edge portion. And the flap is bonded to the main body portion in an easily openable manner in the vicinity of the other end portion along the opening. Material.

  Here, the certain length is preferably 5 mm or more. In addition, the laminated film is further provided with a sealable layer on the side opposite to the thermal adhesive resin layer with respect to the base material layer, which becomes easy to open when adhered to the thermal adhesive resin layer. It is preferable. Moreover, it is preferable that the laminated film is obtained by partially coating the easy-open adhesive portion with an easy-open heat-seal component resin or a hot-melt resin. Moreover, it is preferable that the thermoadhesive resin layer of the laminated film is an easy peel sealant layer that is easily opened when bonded to the base material layer. Moreover, it is preferable that the easy-open adhesive strength is 1 N / 15 mm width or more and 20 N / 15 mm width or less.

  A fourth aspect of the present invention is a package body in which the contents are hermetically packaged with a laminated film having at least a base material layer and a heat-adhesive resin layer, and a main body portion for storing the contents, and the main body portion. An opening provided, and a substantially flat flap covering the opening, the flap being one end serving as a connection end to the main body and the other end serving as a knob end for opening The one end portion is thermally bonded to the main body portion over a certain length in the opening direction of the flap, and the flap is connected to the other end along the opening. In the vicinity of the end portion, the package body is easily bonded to the main body portion.

  5th of this invention uses the laminated | multilayer film which have a base material layer and a thermoadhesive resin layer at least, and puts the content in the main-body part comprised by making the said thermoadhesive resin layer inside the surface film and the back film. A method for producing a packaging material capable of sealing and filling, wherein a flap on a substantially flat surface covering the opening of the main body and the surface film, a heat-adhesive resin layer of the flap, and a base material layer of the surface film, The contents are overlapped with each other so as to be in contact with each other, and the overlapped part can be sealed and thermally bonded to be easily opened, and then the back film is overlapped with the front film and the flap. A manufacturing method of an easy-open packaging material in which an outer peripheral edge portion of the back film is thermally bonded to the surface film and the flap so as to be sealed, leaving an open portion for filling an object and the opening portion. A.

  According to a sixth aspect of the present invention, a laminated film having at least a base material layer and a heat-adhesive resin layer is used. A method for producing a package that is filled and sealed, wherein a flap on a substantially flat surface that covers an opening of the main body and the surface film, a heat-adhesive resin layer of the flap, and a base material layer of the surface film In a state where the overlapped portion is heat-bonded to be easily sealable and easy to open, and then the back film is overlapped with the surface film and the flap, The outer peripheral edge of the back film is heat-sealably sealed to the surface film and the flap, leaving an open part for filling the contents and the opening part, and then the front part is opened from the open part. Filled with contents, a method of manufacturing a later said open portion leaving the opening port portion is sealed by thermal bonding easy-open packaging body accordingly.

  Even if the package is opened and left on the desk or the like as it is, the contents will not spill or jump out. The contents can be kept sealed in the package. A packaging material or a package can be produced by a relatively simple production process similar to the conventional one.

  Embodiments of the present invention will be specifically described with reference to the drawings. FIG. 1 is a view showing an example of a three-side seal type package, (1) front view, (2) A-A ′ cross-sectional view, and (3) right side view. For convenience of explanation, the vertical direction means up and down in the in-plane direction of the drawing. Moreover, the left-right direction means the left-right of the in-plane direction toward drawing.

  The package 10 is configured using a laminated film in which at least a base material layer and a thermoadhesive resin layer are laminated. Details of the laminated film will be described later. The package 10 has the front film 11 and the back film 12 folded at the lower end 22 so that the base material layer is on the outer side and the thermal adhesive resin layer is on the inner side, and the thermal adhesive resin layer is also in contact with the package 10. The peripheral part of the packaging material which consists of the flap 13 arrange | positioned so that it may become the side is heat-bonded, and the content 50 is sealed and filled.

  Here, the back film 12 reaches from the upper end 21 to the lower end 22 of the package 10. On the other hand, the lower end 22 of the front film 11 is the same as that of the rear film 12, but the upper end 20 of the front film 11 is further lower than the lower opening 36 of the upper thermal bonding portion 30 of the package 10. It is only located on the lower side. In this way, the opening 40 is provided in the step portion by providing a step at the position of the upper end 20 of the front film 11 and the upper end 21 of the back film 12. The front film 11 and the back film 12 can be sealed to each other at the left and right side portions 33 and 34 and are thermally bonded to each other so as to be difficult to open, thereby forming a bag-like main body portion having a space 41 for filling the contents.

  The flap 13 is substantially flat and has an upper end at the same position as the upper end 21 of the package 10, covers the entire opening 40, and further opens a non-adhesive opening via an easy-open adhesive portion 35 on the lower side. It reaches the lower end 25 that serves as a handle. The upper portion of the flap 13 can be sealed to the back film 12 by a heat bonding portion 30 and is thermally bonded to be difficult to open, and both side portions 31 and 32 (shown by hatching) of the flap 13 are at the upper end. A portion (length L) from 21 to the upper end 20 of the front film 11 can be sealed with the back film 12 and is thermally bonded to be difficult to open. Thereby, when it is set as a package body, it becomes possible to carry out hermetic packaging of the contents. Further, even if the package is left on a desk or the like after opening, the lid naturally closes due to the elasticity of the flap, and as a result, the contents are not easily spilled.

  In addition, the length L of both side parts 31 and 32 becomes the sum of the height of the heat bonding part 30 and the height of the opening 40 in the package which has the heat bonding part 30 in the upper part like FIG. In a package that does not have a thermal bonding portion on the top as will be described later, the length L is the height of the opening 40 itself. The length L is preferably 5 mm or more. When it is 5 mm or more, the contents are less likely to spill from the package due to the elasticity of the flap when the package is opened. More preferably, it is 1 cm or more, More preferably, it is 2 cm or more.

  Here, as shown in FIG. 1, it may be set so that the opening 40 is located near the upper end 21 of the package 10, or the opening 40 is located near the center in the vertical direction of the package. You may set as follows. In some cases, the length L can be set so that the opening 40 is positioned below the package 10. Therefore, the upper limit of the length L is the length obtained by subtracting the height of the opening knob portion and the easy-open adhesive portion from the total height of the package.

  The flap 13 is an easily-openable adhesive portion 35 provided in a strip shape in the left-right direction near the lower side of the opening 40, and is adhered to the surface of the surface film 11 so as to be sealed. As a result, the contents can be sealed in the state of the package, and the package 10 can be easily opened with fingers when the package is opened. Here, in order to be easily openable, it is preferable that the heat seal strength measured by the measurement method described later is 1 N / 15 mm width or more and 20 N / 15 mm width or less. More preferably, they are 2N / 15mm width or more and 15N / 15mm width or less.

  The easy-open adhesive portion 35 of the flap 13 is provided between the opening 40 and the lower end 25 of the flap 13, but its vertical position is slightly below the upper end 20 of the surface film 11. Thus, it should be slightly above the lower end 25 of the flap. Thus, by giving a fixed space from the upper end 20 and the lower end 25, the flap 13 is prevented from adhering to the back film 12 at the portion where the opening is opened, or the tab allowance at the time of opening is not lost.

  In FIG. 1, the lower end 25 of the flap 13 is linear, but it may be modified like a V shape or a U shape so that the package can be easily opened. Further, the easy-open adhesive portion 35 does not have to be a direct belt shape, and may be V-shaped or U-shaped so as to improve the openability. In particular, the V-shape is preferable because the force at the time of opening is applied to the easy-opening adhesive portion without waste. Further, the upper end 20 of the surface film 11 does not have to be linear as shown in FIG. 1 and is preferably cut into a V shape or a U shape so that the contents can be easily taken out.

  In FIG. 1, the width of the side portions 31 or 32 related to the flap 13 is the same as the width of the side portions 33 and 34 related to the front film 11 and the back film 12. Only the widths of the left and right portions may be made narrower than the widths of the side portions 33 and 34. Specifically, the width of the opening 40 is widened by the width of the side portions 31 or 32 being narrowed. By doing in this way, it becomes easy to take out the contents after opening, ensuring the sealing performance in a package. For this purpose, the shape of the heating element of the heat sealer used when the side portions 31 and 32 are thermally bonded may be processed in advance according to the shape to be bonded.

  FIG. 2 is a schematic view showing a state in which such a package 10 is opened, (1) a front view and (2) a right side view. In order to open the package 10, the opening knob end 25 of the flap 13 is pinched with fingers and pulled up in the upward direction B as shown in FIG. Then, the easily openable adhesive portion 35 is peeled off and the opening 40 is opened. Here, by pulling the upper end 20 of the surface film 11 in the front direction B ′ toward the drawing, the opening 40 is opened widely, and the contents 50 can be easily taken out. At that time, both side portions 31 and 32 at the upper part of the flap 13 remain adhered to the back film 12. Therefore, when the package is left on a desk or the like after opening, the flap naturally returns to a flat shape due to the elasticity of the flap 13, and the contents are not easily spilled.

  The packaging body 10 of FIG. 1 uses a packaging material having at least one side opened, and after filling the contents 50 into the space 41 inside the packaging material through the opened side, the opened side is difficult to open. It is comprised by sealing and adhering to. One side opened by the packaging material can be the upper thermal bonding portion 30 in the package 10 shown in FIG. Further, either one of the left and right thermal bonding portions 31 and 33 or 32 and 34 may be used. In any case, it is only necessary that the main body portion has a bag shape when filling the contents and can be sealed after filling. In addition, in the right and left thermal bonding portions, the films to be thermally bonded are partially overlapped, so that it is relatively difficult to reliably perform thermal bonding. Therefore, it is preferable to use a packaging material in which the left and right heat-bonded portions are heat-bonded in advance, and the heat-bonded portion 30 at the top of the package is an open portion for filling the contents.

  Needless to say, the lower end of the packaging material may be an open portion, and the contents may be filled and heat bonded from here. Furthermore, at the stage of the packaging material, the open portion can be set to two sides or three sides, and in this case, it may be processed into a bag shape before filling the contents. However, if the number of open sides is too large, the packaging material tends to become unstable during handling, and therefore it is preferable to keep the open portion on one side.

  Next, a method for producing such a package or packaging material will be described. First, FIGS. 3-5 is the conceptual diagram which showed the example of the layer structure of the laminated | multilayer film which can be used with such a package or packaging material.

  FIG. 3 shows an example of a laminated film 60 in which a base layer 61 is provided with a sealable layer 63 that is easy to open when thermally bonded to the thermoadhesive resin layer 65. The base film 62 is dry-laminated on one side via a heat-adhesive resin layer 65 and an adhesive layer 66, and a resin layer that becomes a sealable layer is formed on the other side by coating. In such a laminated film 60, when the heat-adhesive resin layers 65 are heat-bonded to each other, the heat-sealing strength is increased, resulting in difficult-to-open adhesion. On the other hand, when heat-bonding is performed in a state where the sealable layer 63 and the heat-adhesive resin layer 65 are in contact with each other, an adhesive state having a low heat seal strength, that is, easy-open adhesive is obtained.

  For example, in the package 10 of FIG. 1, in the heat bonding portions 30 to 34, the heat-adhesive resin layers are bonded to each other so that they are difficult to open. On the other hand, in the heat-bonding portion 35, the heat-adhesive resin layer and the sealable layer are bonded to each other so as to be easily opened. By doing in this way, heat seal intensity | strength can be adjusted so that it may become difficult-to-open property and easy-to-open property in each place.

  Here, the base film 62 is a film for imparting necessary strength to the package, and is a stretched film made of polypropylene (hereinafter referred to as PP) (hereinafter referred to as OPP), nylon 6, nylon 66, nylon 12 or the like. A biaxially stretched film of a polyester resin such as a resin (hereinafter referred to as Ny) stretched film (hereinafter referred to as ONy), polyethylene terephthalate (hereinafter referred to as PET), or polybutylene terephthalate is preferably used. Moreover, films other than these can also be used as needed.

  The base film preferably has a function other than strength. For example, it is preferable to provide gas barrier properties, particularly oxygen barrier properties. As a method for imparting barrier properties, for example, a film obtained by coating the surface of the OPP, ONy, or PET film with a layer having a barrier property such as polyvinylidene chloride (hereinafter, PVDC), polyvinyl alcohol (hereinafter, PVA), or organosiloxane is used. be able to. Also, a film in which aluminum (hereinafter referred to as Al) is vapor-deposited on the surface of the OPP, ONy, PET film, or a film in which an inorganic oxide such as aluminum oxide or silicon oxide is vapor-deposited on the surface of the ONy, PET film can be used. Further, a film obtained by laminating and stretching PP and ethylene-vinyl alcohol copolymer resin (hereinafter EVOH) instead of OPP, or a film obtained by laminating and stretching Ny and metaxylene adipamide resin instead of ONy, A film obtained by laminating and stretching Ny and EVOH can be used. In addition, the OPP, ONy, and PET films can be laminated with films having gas barrier properties such as PVDC films, EVOH films, and Al foils. May be laminated. Moreover, in order to promote consumers' willingness to purchase or to display information on the packaged food, printing may be performed on a part of the base film 62 such as the OPP, ONy, or PET film described above.

  As the thermoadhesive resin layer 65 of the laminated film 60, a thermoplastic resin film having heat sealability can be used. Thermoplastic resins include low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, polypropylene resin, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer. A polymer or the like can be used. Specifically, a general type of TUX series (trade name) manufactured by Tosero Co., Ltd. having a thickness of 40 to 80 microns can be given.

  As a method for producing a thermoplastic resin film having heat sealability, a known film production method can be used. For example, there are a method of extruding a thermoplastic resin from a T die and cooling and forming a film with a cooling roll, and a method of extruding from a circular die and cooling and forming a film by inflation. Moreover, you may extend | stretch, after forming a film once.

  The method of laminating the film to be the base material layer 61 and the film to be the heat-adhesive resin layer 65 is not limited to dry lamination using the adhesive 66 as shown in FIG. Extrusion lamination that is extruded between sheets of film to form an intervening layer may also be used. At that time, if necessary, an anchor coating agent may be applied to the film surface to improve the adhesive strength. As the resin used for the intervening layer, LDPE, ethylene-α olefin copolymer, EVA, ethylene-acrylic acid copolymer, ethylene-acrylic acid ester copolymer, PP, or the like can be used.

  The sealable layer 63 is a resin component that is thermoplastic but is different from the heat-adhesive resin layer and has a relatively low compatibility and adhesiveness with the heat-adhesive resin. For example, when the base film 62 is a PET film, a thermoplastic elastomer can be used as the sealable resin component, and the surface of the base layer can be coated to form the sealable layer 63. An example of such a film product is a product number E7700 of an ester film (trade name) manufactured by Toyobo Co., Ltd.

  Specific examples of the OPP film as the base film include Toray (trade name) product numbers M114 and M304 manufactured by Toray Industries, Inc. using polyolefin-based sealable resin components, Santox product numbers HA20, and Tosero The product number HC-OP of a multi-layer heat seal film (trade name) manufactured by the company, the product number P3162 of Pyrene film-OT (trade name) manufactured by Toyobo Co., Ltd., and the like.

  In any case, the heat seal strength in the case of easy opening is about 1 N / 15 cm width to 5 N / 15 cm width when the thermal bonding temperature is in the range of 110 to 180 ° C. By using such a film as a base film on which the sealable layer 63 is laminated, a laminated film 60 can be obtained.

  Next, FIG. 4 is a schematic view showing an example of a laminated film 70 in which a base material layer 71 is laminated with a sealant layer 72 having an easy peel property with respect to the base material layer 71 as a heat-adhesive resin layer. . The base material layer 71 and the sealant layer 72 are laminated by extrusion lamination or dry lamination. In such a laminated film 70, when the sealant layers 72 are heat-bonded, the heat seal strength is increased and it becomes difficult to open. On the other hand, when the sealant layer 72 and the base material layer 71 are heat-bonded, the heat seal strength is reduced and easy-opening bonding is achieved.

  Here, as the base material layer 71, the same material as the base material layer 62 may be used. The sealant layer having an easy peel property can adjust the heat seal strength with the base material layer 71 by a polymer alloy. As the film 70 having such a sealant layer 72 on the base material layer 71, for example, a product number CMPS006, 009, 012C, 013C, 017C or the like of Easy Open Film (trade name) manufactured by Tosero Co., Ltd. has a thickness of 30 microns. -50 micron PP-based products, product number ZH31FT of VMX film (trade name) manufactured by J-Film, and product number E7700T of differential (trade name) manufactured by Dainippon Ink & Chemicals, Inc. In these laminated films, the heat seal strength in the case of easy opening is about 5 N / 15 cm to 15 N / 15 cm.

  Next, FIG. 5 shows only the portion where the easy-open adhesive on the similar base film 81 is made instead of the sealable layer 63 laminated on the base film 62 in the laminated film of FIG. This is an example of a laminated film 80 that is provided with a layer 84 that provides an unsealing adhesive and serves as a substrate layer. As an example of the layer 84 partially provided in this way, a case where a layer that can be an adhesive suitable for the base material layer is provided by a printing technique or partial coating can be given.

  For example, when the base film 81 is an OPP film, EVA, chlorinated PP, or acrylic adhesive can be used as the adhesive layer 84. Specific examples of such an adhesive include Seikadine (trade name) product number 1001 which is a gravure printing adhesive manufactured by Dainichi Seika Kogyo Co., Ltd. Moreover, when the base film 81 is a PET film or an ONy film, the thing of a polyester-type resin composition can be used as an adhesive agent. Specific examples of such an adhesive include Seikadine (trade name) product numbers T22B and T-18 manufactured by Dainichi Seika Kogyo Co., Ltd. In such a case, the heat seal strength of the easy-open adhesive is about 1 N / 15 cm width to 5 N / 15 cm width when the thermal bonding temperature is in the range of 70 ° C. to 170 ° C.

  Moreover, it can also be set as easy-open adhesive by carrying out partial coating of the hot melt type coating agent to the applicable part at the time of a bag making process. Examples of such a coating agent include an EVA resin having a product number DX of Dickmelt (trade name) manufactured by Dainippon Ink and Chemicals, Inc. Also in this case, the seal strength of the easy-open adhesive is about 1 N / 15 cm width to 5 N / 15 cm width.

  By using these laminated films illustrated in FIGS. 3 to 5, it is possible to obtain a target packaging material and further a package. In addition, the laminated | multilayer film illustrated here has shown what can manufacture both a main-body part and a flap using one type of film. This is because the process of making a packaging material or the like is simplified. However, it is also possible to obtain similar packaging materials by using different films for the main body and the flap.

  Next, using FIGS. 6-1, 6-2, 7-1, and 7-2, the three-side sealed package 10 shown in FIG. The manufacturing process will be described. First, steps (1) to (6) continuously shown in each perspective view in FIGS. 6-1 and 6-2 are examples in which the package 10 or its packaging material is made one by one.

  In FIG. 6A (1), the laminated film cut to an appropriate size is first rolled into a substantially cylindrical shape with the heat-adhesive resin layer on the inside. At that time, the portion near the end that becomes the lower end 25 of the flap and the portion near the other end that becomes the upper end 20 of the surface film are rounded so as to overlap each other.

  Subsequently, in (2), easy-open adhesive is applied to the part partially overlapping in (1). When the partial coating method is used, a necessary partial coating is applied to the corresponding portion of the surface film 11. A heat insulating plate 100 is inserted in the direction of arrow C in a cylinder in which the laminated film is rounded to sandwich the film paired with the heat generating element of the heat sealer and to prevent the heat of the heat sealer from being transmitted to the back film. Thereafter, heat is applied across the overlapping portion by a heat sealer (not shown) to provide an easy-open adhesive portion 35 (hatched). Thus, the laminated film becomes a cylindrical film.

  Subsequently, in (3), the laminated film is cut at an appropriate position above the cylindrical film, and upper ends 21 and 21 'appear. In this case, not the upper part but the lower part may be cut. In any case, the cut part becomes an open part for filling the contents. Subsequently, moving to FIG. 6-2 (4), the left and right side portions 33 and 34 (hatched) are thermally bonded by a heat sealer. This completes the packaging material whose upper part is an open part.

  If the upper part is not cut in (3) and only one of the two side parts (for example, only 34) is thermally bonded in (4), a packaging material having an open part on the left side can be obtained.

  Using this packaging material, a package is constructed in the steps (5) and (6). In the step (5), the packaging material is filled with the contents. When filling, the packaging material may be slightly deformed by pressing it from the left and right sides so that the open portion 42 has a large opening. The contents are thrown from the open portion 42 as shown by the arrow D. Subsequently, in (6), the open portion 42 is thermally bonded and sealed to become the thermally bonded portion 30. Thus, the package 10 in which the contents are sealed is completed.

  Next, the other steps (1) to (8) for producing the package 10 shown in FIG. 1 will be described with reference to FIGS. In this step, bag making and filling can be performed continuously instead of bag making and filling one by one as described above. Here, FIGS. 7-1 (1) to (4) are cross-sectional views showing a state in which a long film is placed in the vertical direction in the drawing and sequentially flows in the vertical direction in the drawing.

  In FIG. 7-1 (1), a laminated film that becomes the front film 11 and the back film 12 and a laminated film that becomes narrower than the laminated film 13 are in contact with each other with the heat-adhesive resin layer. Are partially overlapped. In that case, it overlaps so that the edge part of the laminated | multilayer film used as a flap may protrude from the edge part of another laminated film.

  Subsequently, in (2), the vicinity of the center of the overlapped portion is sequentially sandwiched between the heat sealer 110 and the receiving plate 111 from above and below, and thermally bonded from the direction of arrow E. Thereby, the easy-open adhesive part 35 is provided. In addition, when using the partial coating method, it cannot be overemphasized that it is necessary to carry out partial coating to the applicable part previously.

  Subsequently, in (3), the wide laminated film is bent in the direction of arrow F so that the left and right positions of the flap end 21 and the back film end 21 ′ are aligned in the same direction. . Subsequently, in (4), the vicinity of the aligned end portion 21 is sequentially sandwiched between the heat sealer 120 and the receiving plate 121 and thermally bonded from the direction of arrow G. At that time, heat bonding is performed with a predetermined width so as to avoid the left end 20 (upper end 20 in FIG. 1) of the surface film 11 and the opening 40.

  Then, it moves to (5). For convenience of explanation, (5) is a perspective view viewed from a direction substantially perpendicular to the flow direction of the film, and shows a state in which the film flows from the bottom toward the top in the drawing. The same applies to FIGS. 7-2 (6) to (8). In FIG. 7-1 (5), the state which looked at the front-end | tip part of the elongate cylindrical film obtained through process (1)-(4) from the back film 12 side is shown. In this state, the tubular film is sandwiched between the heat sealer 130 and the receiving plate 131 and heated from the H direction so as to be perpendicular to the axial direction of the cylinder at a predetermined distance from the tip part, and difficult-to-open heat bonding Provide a part. Thereby, a bag-shaped main-body part is comprised.

  Subsequently, moving to FIG. 7-2 (6), the distal end portion of the tubular film is pushed a little from the arrow directions J and J ′ to widen the open portion 43 of the distal end portion, and into the bag-shaped space at the thermal bonding portion 34. The contents are filled from the direction of arrow K. Subsequently, the process proceeds to (7), where the open portion 43 is horizontally sandwiched between the heat sealer 140 and the receiving plate 141 and thermally bonded to provide a hard-to-open heat-bonded portion. Finally, it cut | disconnects from a cylindrical film in the lower end part of the lower side heat bonding part 34 in a figure, and the package 10 shown to (8) is obtained.

  Here, the separation from the tubular film in (7) may be performed immediately after the thermal bonding in (5). In the steps of FIGS. 7-1 and 7-2, the package can be continuously formed. On the other hand, in the case of deformation by pressing in the directions of arrows J and J ′ in (6), easy opening is possible. There is a possibility that the bonded part may be peeled off. Therefore, although it is easy to open, it is preferable to set the adhesive strength high.

  Various variations of the manufacturing method of the package or the packaging material are conceivable. Although FIG. 6 and FIG. 7 demonstrated the case where one type of film was used, in the process of FIG. 7, you may use a different laminated film in a flap and a main-body part. Moreover, you may make it become a laminated | multilayer film from which a surface film and a back film differ in any of FIG. 6, FIG.

  The packaging material or packaging bag is not limited to the three-side sealed bag exemplified above, but a four-side sealed bag in which all four sides are similarly sealed, a jointed bag having an opening at the center of the bag, and the package of FIG. A bottom gusset bag 200 (shown in FIG. 8) that is heat-bonded by folding the bottom 204 into a W-shape, a standing bag that is bonded and folded by inserting another film into the bottom opposite to the opening, and another film on both sides The four-corner seal gusset bag inserted by heat bonding and folded, and the lower part of the bag is not the upper part but the lower part becomes an open part, and then the three-sided seal bag 300 (shown in FIG. 9) which is the thermal adhesive part 320 A format is also possible.

  Hereinafter, the present invention will be described based on examples. The thermal bond strength was evaluated as follows. First of all, the test pieces were joined to the heat bonding surfaces of two films, one end of which was a heat seal tester TP-701S manufactured by Tester Sangyo Co., Ltd., with a heat bonding time of 1 second, a heat bonding pressure of 98 kPa, and a heat bonding temperature of 180. A test piece was prepared at 0 ° C. The thermal bond strength was measured according to JIS-Z1707 in an environment of 23 ° C. and 50% relative humidity. However, the test speed was 300 ± 30 mm per minute. A plurality of test pieces were measured for each of the film flow direction (MD) and the width direction (TD) and averaged.

  An ester film E7700 (having a thickness of 16 microns) manufactured by Toyobo Co., Ltd., on which a sealable layer was provided on a PET film, was used as the base film of the laminated film. Moreover, the 50-micron-thick thing of the TUX series which is the LLDPE film by the Tosero company was used as the film of a heat bondable resin layer. These two films were laminated so that PET and LLDPE were in contact with each other, and a gap between them was bonded with a polyurethane two-component curable adhesive having a thickness of 2 μm to form a laminated film constituting a packaging material or a package.

  Using this laminated film, according to the steps shown in FIGS. 6-1 and 6-2, a three-side seal type packaging material having an open portion at the top shown in FIG. 6-2 (4) was made. The width and height of the packaging material is 120 mm, the width of the thermal bonding portion at the periphery is 10 mm, the length from the upper end 21 of the packaging material to the upper end 20 of the surface film 11 is 20 mm, and the lower end of the flap 13 from the upper end 21 of the packaging material The length up to 25 was 45 mm, the width in the vertical direction of the easy-open adhesive portion was 10 mm, and it was positioned approximately in the middle between the upper end 20 and the lower end 25.

  The heat-bonding conditions of the easy-open adhesive portion were a heat seal temperature of 150 ° C., a heat seal time of 1 second, and a heat seal pressure of 98 kPa. Moreover, the heat seal conditions of the difficult-to-open portion were a heat seal temperature of 120 ° C., a heat seal time of 1 second, and a heat seal pressure of 98 kPa. Here, the heat seal strength of each heat-bonded part was measured with a test piece separately prepared under the same heat seal conditions. The thermal bond strength of the easy-open adhesive part was 3 N / 15 mm width. Moreover, the heat bond strength of the difficult-to-open adhesive portion was 60 N / 15 mm width.

  Next, about 30 g of almond nuts having an average length of 20 mm were introduced into the packaging material thus obtained from the open portion. Subsequently, the open part was heat-bonded to make it difficult to open to obtain a package.

  The package was completely sealed. Further, when the opening end of the flap was picked up with fingers, it was easily opened and the contents could be taken out. Further, even when the package was laid on the desk in an opened state, the flap naturally closed the opening, and the nuts inside did not spill out.

It is (1) front view, (2) A-A 'cross-sectional view, (3) right side view showing an example of a three-way seal type package. It is the (1) front view and (2) right view which showed typically the opening state of the package. It is the conceptual diagram which showed an example of the layer structure of a laminated | multilayer film. It is the conceptual diagram which showed the other example of the layer structure of a laminated | multilayer film. It is the conceptual diagram which showed the further another example of the layer structure of a laminated | multilayer film. It is the figure which showed the outline of the first half part (1)-(3) of the manufacturing process of a three-way seal type package. It is the figure which showed the outline of the latter half part (4)-(6) of the manufacturing process of a three-way seal type package. It is the figure which showed the outline of the first half part (1)-(5) of the other manufacturing process of a three-way seal type package. It is the figure which showed the outline of the latter half part (6)-(8) of the other manufacturing process of a three-way seal type package. It is the (1) front view and (2) right view which showed the example of the bottom gusset type package. It is (1) front view and (2) right side view of a three-sided seal type packaging body in which the lower part is an open part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Packaging body 11 Surface film 12 Back surface film 13 Flap 20 Upper end of surface film 21, 21 'Upper end of packaging body 22 Lower end of packaging body 23, 24 Left end and right edge of packaging body 25 Lower end of flap 30 Upper peripheral edge (thermal bonding portion )
31, 32 Flap both sides (thermal bonding part)
33, 34 Both sides of the main body (thermal bonding part)
35 Easy-open adhesive part 36 Lower end 40 of upper thermal adhesive part 40 Opening opening 41 Storage space 42, 43 Open part 50 Contents 60, 70, 80 Laminated film 61, 71 Base material layer 62, 81 Base material film 63 Sealable layer 65 , 82 Thermal adhesive resin layer 66, 83 Adhesive layer 72 Sealant layer 84 Partial coating layer (adhesive layer)
100 Insulation plate (back plate)
110, 120, 130, 140 Heat sealer 111, 121, 131, 141 Back plate 200 Bottom gusset bag 300 Other three-side seal bag 201, 301 Surface film 202, 302 Back film 203, 303 Flap 204 Bottom 205, 304 Upper end of surface film 305 Upper end 206, 310 Easy-open adhesive part 207, 306 Lower end 320 Thermal adhesive part

Claims (11)

  A packaging material comprising a laminated film having at least a base material layer and a heat-adhesive resin layer, wherein at least one of peripheral edges of the laminated film is opened, and a main body for storing contents, and the main body An opening provided in the opening and a substantially flat flap covering the opening, the flap being connected to the main body, one end and the other opening serving as an opening knob An end portion, and at least one of both side portions of the one end portion is thermally bonded to the main body portion over a certain length in the opening direction of the flap, and the flap is connected to the opening. A packaging material characterized in that, in the vicinity of the other end along the line, the main body is bonded to the main body so as to be easily opened.   A packaging material that is composed of a laminated film having at least a base material layer and a heat-adhesive resin layer, and one of the peripheral edges of the laminated film is open, and a main body for storing contents, and the main body And a substantially flat flap covering the opening, and the flap has one end serving as a connection end to the main body and the other end serving as a knob end for opening. The one end portion is thermally bonded to the main body portion over a certain length in the opening direction of the flap, and the flap extends along the opening. A packaging material characterized in that, in the vicinity of the other end portion, the main body portion is bonded to the main body portion so as to be easily opened.   A packaging material that is composed of a laminated film having at least a base material layer and a heat-adhesive resin layer, and one of the peripheral edges of the laminated film is open, and a main body for storing contents, and the main body And a substantially flat flap covering the opening, and the flap has one end serving as a connection end to the main body and the other end serving as a knob end for opening. The one end of the one end is thermally bonded to the main body over a certain length in the opening direction of the flap, and the other is opened corresponding to one of the peripheral portions. The packaging material is characterized in that the flap is bonded to the main body portion so as to be easily opened in the vicinity of the other end portion along the opening.   The packaging material according to any one of claims 1 to 3, wherein the fixed length is 5 mm or more.   The laminated film is further provided with a sealable layer on the side opposite to the thermal adhesive resin layer with respect to the base material layer, which becomes easy to open when adhered to the thermal adhesive resin layer. The packaging material according to any one of claims 1 to 4, wherein the packaging material is characterized in that   5. The laminated film according to claim 1, wherein the easy-open adhesive part is partially coated with an easy-open heat-seal component resin or a hot-melt resin. Packaging materials.   The packaging material according to any one of claims 1 to 4, wherein the heat-adhesive resin layer of the laminated film is an easy peel sealant layer that is easily opened when bonded to the base material layer.   The packaging material according to any one of claims 1 to 7, wherein the easy-open adhesive strength is 1 N / 15 mm width or more and 20 N / 15 mm width or less.   A package in which the contents are hermetically packaged with a laminated film having at least a base material layer and a heat-adhesive resin layer, and a main body for storing the contents, an opening provided in the main body, A substantially flat flap covering the opening, the flap having one end serving as a connection end to the main body and the other end serving as a knob end for opening, The both ends of the end portion are thermally bonded to the main body portion over a certain length in the opening direction of the flap, and the flap is in the vicinity of the other end portion along the opening. The package is characterized in that it is bonded to the main body portion so as to be easily opened.   A packaging material capable of hermetically filling the contents into a main body configured using a laminated film having at least a base material layer and a heat-adhesive resin layer, and having a front film and a back film with the heat-adhesive resin layer inside. The flap on the substantially flat surface that covers the opening of the main body and the surface film are partially so that the heat-adhesive resin layer of the flap and the base material layer of the surface film are in contact with each other. And heat-adhering the overlapped portion in a sealable and easy-opening manner, and then filling the contents with the back film overlapped with the front film and the flap. The manufacturing method of the easily openable packaging material which heat-bonds the outer peripheral edge part of the said back surface film to the said surface film and the said flap so that sealing is possible, leaving an open part and the said opening part. A package in which a laminated film having at least a base material layer and a heat-adhesive resin layer is used, and the front film and the back film are filled with the contents and sealed in the main body portion that is configured with the heat-adhesive resin layer inside. A substantially flat flap covering the opening of the main body and the surface film are arranged so that the heat-adhesive resin layer of the flap and the base material layer of the surface film are in contact with each other. In order to fill the contents in a state in which the back film is overlapped with the surface film and the flap. The outer peripheral edge of the back film is heat-sealed to the front film and the flap so as to be hermetically sealed, and then the contents are filled from the open part. , Accordingly the manufacturing method of later said open portion leaving the opening port portion is sealed by thermal bonding easy-open packaging body.

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