JP2006111285A - Easy-unsealable packaging material having superior barrier properties - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an easy-unsealable packaging material having high barrier properties. <P>SOLUTION: The packaging material is composed of a laminated film having at least a base material layer, a barrier layer, and a heat adhesive resin layer. The packaging material comprises a body which has an inlet and an outlet for a packaged material that is stored in the body, and a tape which is stuck at the outside of the body to be easily unsealed and cover the whole of the inlet. The tape has barrier properties equal to or stronger than that of the laminated film, and is provided with a tab portion which is formed along at least one side on the outer periphery of the tape and is not stuck to the body. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a packaging material for products such as a lens-equipped film (also referred to as a disposable camera). Specifically, the present invention has a high barrier property so that the contents are sufficiently shielded from the external environment and easily opened. It relates to packaging materials and the like.

  In the case of packaging materials for products such as film with a lens, for example, lamination of aluminum foil or heat-sealable polyethylene film on a base film such as polyester film is necessary because the product needs to be shielded from light, moisture, dust, etc. Thus, a composite film having a high barrier property excellent in light shielding properties, durability, moisture resistance, chemical resistance and the like is used. Such a composite film is formed into a packaging material by heat bonding between heat sealing layers provided on one side of the film, and after the product is filled, the packaging material inlet is heat sealed to form a sealed state. Often used as a package.

  On the other hand, since such a package is opened by a consumer who has purchased a product with his / her fingers when used, the opening is required to be easily openable. However, such a high barrier composite film is designed to have a relatively high strength in order to increase the durability of the package. Therefore, a certain device is required to make such a package easy to open. For example, as a packaging material for a film with a lens, the vertical sealing portion of the packaging bag is heat-sealed from the end of the upper sealing portion to the end of the lower sealing portion of the packaging material, and It is provided on the smaller side of the side surface of the prism, and the upper sealing part is provided with an opening cut, and at the time of opening, from the opening cut through the upper sealing part and the vertical sealing part A packaging bag that is opened so as to reach the lower sealing portion is disclosed (see Patent Document 1).

  However, in such a packaging bag, it is difficult to understand the opening method, it is necessary to provide an indication of the opening method, and at the time of opening, both sides of the opening end are grasped with fingers of both hands, and it is opened by tearing in the opposite direction, The product may be dropped due to excessive effort during opening.

For paper envelopes and the like, a simple packaging method is also well known in which a tape such as a cellophane tape is attached to the whole or a part of the end of the flap covering the slot and sealed. Such a method is generally used for applications that do not need to be conscious of high barrier properties. Regarding the tapes used, the adhesive strength, the tensile strength of the substrate, the durability, the transparency, and the peeling The actual situation is that product development is being performed independently based on a viewpoint completely different from the packaging material, such as the fact that no adhesive remains later.
JP-A-9-120119

  This invention makes it a subject to provide the packaging material etc. whose packaging body is high barrier property and is easily openable.

  The first of the present invention is composed of a laminated film having at least a base material layer, a barrier layer, and a heat-adhesive resin layer, and has an input port and a take-out port for the packaged product and stores the packaged product. And a tape part adhered to the whole of the take-out port from the outside of the main body part so as to be easily opened, and the tape part has a barrier property equal to or higher than that of the laminated film, and the tape. An easy-open packaging material characterized by having a knob portion that is not bonded to the main body portion along at least one side of the outer peripheral portion of the portion.

  Here, it is preferable that the extraction port extends over substantially the entire length of the main body. Moreover, it is preferable that the said taking-out port is comprised by butt | matching the edge part of the said laminated | multilayer film. Moreover, it is preferable that the said tape part replaces the said thermoadhesive resin layer in the said laminated | multilayer film with the adhesive bond layer which becomes easily openable. Moreover, it is preferable that the said knob | pick part is provided along the length direction of the said tape part. The adhesive layer is preferably a heat-adhesive easy-open adhesive layer. Moreover, it is preferable that the said packaged product is a film with a lens.

  A second aspect of the invention is an easy-open packaging body in which the packaged product is charged into the packaging material according to any one of the above and sealed.

  A packaging material having high barrier properties and easy opening is obtained. For example, when a packaging body using this packaging material is used for packaging a film with a lens or the like, there is no risk of dropping a product upon opening.

  Embodiments of the present invention will be specifically described with reference to the drawings. FIG. 1 is a perspective view showing an example of a packaging material. This packaging material is configured by using a laminated film having a base material layer, a barrier layer, and a thermoplastic resin layer, and when the packaged product is taken out from the main body unit 10 that can store the packaged product. It consists of a tape part 20 that covers the whole take-out port 11 to be opened.

  The main body 10 is folded so as to be a deformed hexagonal cylinder in which two opposite sides are folded inward with the thermoplastic resin layer of the laminated film inside. The reason why the modified hexagonal cylinder is used is that a substantially rectangular parallelepiped package such as a film with a lens can be packaged in a good shape. That is, at the time of packaging, the portion folded inward returns to a flat surface and forms a gusset bag that matches the packaged product.

  Out of the four end portions of one laminated film constituting the main body portion 10, two end portions parallel to the axial direction of the deformed hexagonal cylinder are aligned to contact each other or have a slight gap 11 Is preferable. This portion serves as a takeout port for taking out the product when opened. For this reason, it is preferable to make the butt contact because the opening for opening is maximized at the time of opening, and the packaged product is easily taken out. However, the two ends can be made to overlap each other, although the packaged item is somewhat difficult to take out.

  The take-out port 11 extends over substantially the entire length excluding the sealed end of the main body 10. By doing so, the takeout opening is maximized at the time of opening, and it becomes easy to take out the packaged product. In addition, one of the two end portions perpendicular to the axial direction of the main body portion 10 is heat-sealed to form a sealed end 13 in a sealed state, and the other is left in an open state, and a packaged product is loaded. It is an insertion port 12 for this purpose. The input port 12 is heat-sealed and sealed in the same manner as the sealing end 13 after the packaged product is input. Thereby, a package is obtained.

  A tape portion 20 is bonded from the outside of the main body portion 10 along the take-out port 11 of the main body portion 10 over the entire length of the take-out port 11 and with a constant width. Thereby, when it is set as a package body, the taking-out port 11 is sealed. That is, the entire package is sealed. The tape portion 20 is provided over the entire length of the main body portion 10, so that the sealing is ensured and the packaging material can be easily manufactured because the tape portion 20 may be cut together with the main body portion when the packaging body is manufactured. The tape portion 20 does not necessarily extend over the entire length of the main body portion 10, but it is necessary to cover the entire outlet 11. This is to ensure barrier properties.

  The tape unit 20 has a barrier property equal to or higher than that of the laminated film constituting the main body unit 10. By doing in this way, what needs to be blocked from the outside according to the packaged product such as moisture and oxygen is less likely to enter the package from the portion of the take-out port 11. Preferably, the barrier property of the laminated film of the main body part 10 and the tape part is equivalent. Specifically, it is preferable that the layer configuration of the base film and the barrier layer of the laminated film of the main body portion 10 is the same as the layer configuration of the base material layer and the barrier layer of the tape portion 20. When the basic layer configuration is the same as described above, the heat-adhesive resin layer of the laminated film of the main body portion 10 is replaced with the easy-open adhesive layer of the tape portion. With such a layer structure, the tape part can be manufactured relatively easily and the manufacturing cost can be kept low.

  The tape part 20 is bonded to the outside of the main body part 10 with an adhesive strength that can be opened with fingers, and is easy to open. Specifically, the adhesive strength is preferably about 5 N / mm to 15 N / mm. By doing so, when the consumer opens with fingers, the tape portion 20 and the main body portion 10 can be easily peeled off and opened, and an unexpected bag breakage occurs when the package is transported. There is nothing. In order to make it easy to open, it is necessary to appropriately select an adhesive layer that generates easy-open adhesive in accordance with the material of the adhesive surface of the tape part 20 and the main body part 10. If the selection is inappropriate, it may not be bonded at all, or it may not be easy to open even if bonded. The specific layer configuration of the laminated film of the main body 10 and the layer configuration of the tape portion will be described later.

  The tape portion 20 is provided with a non-adhesive portion 21 that can be picked with fingers without being adhered to the main body portion 10 along at least one side of the outer peripheral portion thereof. The package can be easily opened by picking and peeling off the non-adhesive portion 21. The non-adhesive portions 21 are preferably provided on both sides of the outer peripheral portion of the tape portion 20 along the length direction of the tape portion 20 as shown in FIG. Further, in the example of FIG. 1, if the non-adhesive portion 21 is provided over the entire length of the tape portion 20, any portion of the entire length of the tape portion 20 can be picked and opened, which is convenient. is there. Moreover, you may make it provide a non-bonding part in the front-end | tip part and rear-end part of the length direction of a tape part. In this case, since it is necessary to cover the take-out port 11, the non-adhesive portion is provided on the sealed ends on both sides of the main body. From the viewpoint of ease of manufacture of the packaging material and ease of opening, it is preferable to provide it along the length direction of the tape portion 20.

  Since the easy-open adhesive portion of the tape portion 20 to the main body portion 10 is a portion excluding the non-adhesive portion, the adhesive portion needs to cover the entire extraction port 11. The width of the bonded portion from the take-out port 11 to the non-bonded portion is preferably 1 mm or more and 1 cm or less. Within this range, the tape portion has a certain adhesive strength, and desirable barrier properties and easy opening properties can be achieved. More preferably, they are 1 mm or more and 5 mm or less, More preferably, they are 2 mm or more and 5 mm or less. This adhesion portion is located on both sides of the take-out port 11.

  Moreover, the width | variety of the non-adhesion part of a tape part should just be enough to be able to be picked with fingers, and although it does not specifically limit, What is necessary is just about 1 mm or more and 1.5 cm or less. More preferably, it is about 1 mm or more and 1 cm or less, More preferably, it is 2 mm or more and 5 mm or less. In order to provide such a non-adhesive part, a non-adhesive knob-shaped convex part may be provided on the outer peripheral part of the tape part, or the knob piece may be inserted into the adhesive surface so that a part protrudes from the outer peripheral part. Although it is good, it is preferable to provide the adhesive layer of the tape part excluding the non-adhesive part from the viewpoint of manufacturing simplicity.

  The width of the tape part is preferably 3 mm or more. Within this range, the strength of the tape necessary for opening can be maintained. Moreover, the influence of the meandering produced in the manufacturing stage of a tape or a packaging material remains in a small range. More preferably, it is 5 mm or more, More preferably, it is 1 cm or more. The upper limit of the width of the tape is not particularly limited as long as it is equal to or less than the width of the packaging material. However, if the width is too wide, it may not be recognized by the consumer that the tape is stuck. More preferably, it is 2 cm or less.

  Since the tape portion is thus provided, it can be easily understood that the portion to be opened is the tape portion. Also, scratching the end of the tape when removing the tape is usually a casual action, and by such action, the presence of the non-adhesive portion can be immediately recognized, so the opening method can be understood very easily.

  FIG. 2 is a perspective view showing an example of another packaging material. This example is also an example of a gusset bag similar to the packaging material of FIG. 1, except that the take-out port 31 is provided along one side of the deformed hexagonal cylinder that is the main body 30. The other points are the same as the packaging material of FIG. This packaging material 2 is also easy-opening like the packaging material 1 of FIG. 1, and can produce the same effect. That is, the position of the take-out port is not particularly limited, and the take-out port can be provided at any place where the packaging material can be easily manufactured and the packaged product can be easily taken out.

  In addition, it is preferable that the length of the take-out port extends over almost the entire length or almost the entire width excluding the sealing adhesive portion at the end of the packaging material because the packaged product can be easily taken out. Further, the take-out port can be provided so as to make a round of the packaging material. In this case, the production of the packaging material becomes a little difficult, but the packaged product becomes easier to take out.

  1 and FIG. 2, for example, a packaged product is obtained by putting an integral packaged product in a rectangular parallelepiped such as a lens-equipped film and sealing the inlet. An example of a package 3 using the packaging material 1 of FIG. 1 is shown in FIG. The appearance of the package 3 is the same as that of a normal gusset bag, except that a portion corresponding to the back is provided with an easily openable tape portion 20. This package has a simple appearance, no extra protruding parts, etc., and can be tightly packed, which may cause the package to get caught in something during transportation and cause an unexpected bag breakage. There is no, and beautiful packaging can be realized. In addition, easy-openability can be reliably obtained, and variations in opening performance are unlikely to occur.

  In order to open the package, the main body part 10 is grasped together with the article to be packaged with one hand, the non-adhesive part 21 of the tape part 20 is picked with the other hand, and the tape part 20 is peeled off from the main body part 10. . Since the packaged product maintains the shape of the package 3 and acts against the pulling force from the tape part 20, the tape part 20 is peeled off from the main body part 10 and the takeout port appears. In this way, there is no possibility of dropping the packaged product when opening. After that, it is only necessary to expand the outlet and take out the packaged product. FIG. 4 shows a state where the tape part 20 is peeled off, the takeout port 15 is opened, and the packaged product 16 is visible from the outside. The take-out port 15 is expanded in the directions of arrows indicated by A and A ′.

  Next, the layer structure of the laminated film and tape portion used in the packaging material will be described. FIG. 5 is a schematic diagram showing an example of a layer structure of a laminated film that can be used as a packaging material. FIG. 5A is a schematic diagram showing a cross-sectional view of the layer configuration of the tape portion 20 as viewed from the length direction, and FIG. 5B is a schematic diagram of the layer configuration of the laminated film used in the main body portion 10. It is. First, a layer configuration example of the laminated film 60 used in the main body portion of FIG. The laminated film of the main body has a base material layer, a barrier layer, and a heat adhesive resin layer. In the example of FIG. 5 (2), the laminated film is composed of five layers. From the upper side in the figure, the base layer 61, the intervening layer 62, the barrier layer 63, the intervening layer 64, and the thermal adhesive resin layer 65 are arranged in this order. Are stacked. The base material layer and the barrier layer may be interchanged, and the main body portion is laminated with the base material layer and the barrier layer as shown in FIG. 5 (2), and the tape portion is the base material layer from FIG. 5 (1). And may be laminated so that the barrier layer is interchanged

  The base material layer 61 is a layer constituted by using a film for imparting necessary strength to the package, and usable films include a stretched film made of polypropylene (hereinafter referred to as PP) (hereinafter referred to as OPP), nylon. 6. Biaxially stretched films of polyester resins such as nylon 66 (hereinafter referred to as Ny) stretched film (hereinafter referred to as ONy), polyethylene terephthalate (hereinafter referred to as PET), and polybutylene terephthalate. It is done. In addition, a film obtained by laminating and stretching PP and ethylene-vinyl alcohol copolymer resin (hereinafter EVOH) is used, or a film obtained by laminating Ny and metaxylene adipamide resin instead of ONy and laminating Ny and EVOH. A stretched film can be used. Furthermore, Toray Industries, Inc. product numbers M114 and M304, Santox product number HA20, Toray Cello multilayer heat seal film (to be described later) using polyolefin-based sealable resin components (described later) (Product name) product number HC-OP, Toyobo's pyrene film-OT (product name) product number P3162, and the like. Moreover, you may use films other than these according to the objective. In addition, you may perform the printing for displaying the display for promoting consumer's willingness to purchase, the information regarding the packaged food, or the opening method and opening position of a package on the base film.

  The barrier layer 63 is a layer for imparting a high barrier property required for a packaged product, and is configured by laminating, coating, or vapor-depositing a film having such characteristics on the surface of the base material layer. For example, in a film with a lens, an aluminum foil, a vapor-deposited aluminum layer, or a vapor-deposited aluminum oxide layer is often selected from the viewpoint of light shielding properties and moisture permeability resistance. FIG. 5 (2) shows an example of the layer structure when a film having a barrier property such as an aluminum foil is extruded and laminated. Other packaged products may have oxygen barrier properties, for example. In addition to using the above-mentioned aluminum foil or the like as a method for imparting barrier properties, the necessary barrier properties such as polyvinylidene chloride (hereinafter referred to as PVDC), polyvinyl alcohol (hereinafter referred to as PVA), and organosiloxane are used on the surface of the base layer film. It is also possible to form a barrier layer by coating a layer having, or laminating a similar film. Furthermore, a film having both necessary high barrier properties and strength may be used as the base material layer, and may also serve as the base material layer and the barrier layer. Such a barrier layer can be produced by a known method.

  The heat-adhesive resin layer 65 is a layer for heat-sealing laminated films necessary for constituting a packaging material or a package to make it difficult to open, and a thermoplastic resin is selected. Thermoplastic resins include low density polyethylene (hereinafter LDPE), medium density polyethylene (hereinafter MDPE), high density polyethylene (hereinafter HDPE), linear low density polyethylene (hereinafter LLDPE), polypropylene resin, and ethylene-vinyl acetate. A polymer, an ethylene-acrylic acid copolymer, an ethylene-methacrylic acid copolymer, or the like can be used. Such a heat-adhesive resin layer can be produced by a known method. More 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. The packaging material is configured such that the thermal adhesive resin layer is on the inner side.

  The intervening layer 62 includes the base material layer 61 and the barrier layer 63, and the intervening layer 64 includes the barrier layer 63 (a base material layer when the base material layer and the barrier layer are interchanged) and the thermal adhesive resin layer 65, respectively. It is a layer provided for bonding. The intervening layer may be appropriately selected depending on the material of the layer to be bonded and the method of lamination. For example, when a laminated film is formed by extrusion lamination, the resin used for the intervening layer is LDPE, ethylene-α olefin copolymer, EVA, ethylene-acrylic acid copolymer, ethylene-acrylic acid ester copolymer. PP or the like can be used. At that time, if necessary, an anchor coating agent may be applied to the film surface to improve the adhesive strength.

  Further, when a laminated film is formed by dry lamination, an adhesive suitable for the material of the layer to be bonded may be selected. At that time, different adhesives can be selected for the intervening layers 62 and 64. When the barrier layer is formed by vapor deposition on the base material layer, there is no intervening layer between the barrier layer and the base material layer.

  Next, the layer structure of the tape portion in FIG. In this example, the tape portion is a laminated film 50 having a base material layer 51, an intervening layer 52, and a barrier layer 53, similar to the base material layer 61, the intervening layer 62, and the barrier layer 63 of the laminated film 60 of the main body portion. ing. By doing in this way, a tape part has a barrier property equivalent to a main-body part. On the other hand, in the laminated film 50 of the tape part, the heat-adhesive resin layer 65 in the laminated film 60 of the main body part is the adhesive layer 54, and the width of the adhesive layer 54 is narrower than the width of the base material layer 51. The non-adhesive portion in which the tape portion does not adhere to the main body portion is formed along one piece in the length direction of the tape portion, and there is no intervening layer between the pressure-sensitive adhesive layer 54 and the barrier layer 53. Different. The pressure-sensitive adhesive layer 54 has a function of adhering the tape part to the main body part with easy opening.

  Moreover, it may replace with the adhesive layer 54 and may use the 1 type (s) or 2 or more types of adhesive layer which can be thermally bonded by the easily openable adhesive strength to a base material layer. In view of the desirability of preventing the product from being resealed once opened and the cost of manufacturing, it is more preferable to use an adhesive layer that can be thermally bonded for easy opening. When using an adhesive layer that can be thermally bonded for easy opening, an adhesive layer 54 having a narrow width may be provided as in FIG. 5A, or an adhesive layer having the same width as the base material layer 51 and the like. And a non-adhesive portion may be provided by adjusting the heat seal width to be narrow during bag making.

  Such an adhesive layer or an adhesive layer that can be thermally bonded to easily openable may be provided on the tape portion or on the base material layer. Further, different layers can be provided on the tape portion and the base material layer, respectively, and the two can be bonded to facilitate opening.

  As an adhesive layer provided in any one, a sealant layer having an easy peel property with respect to the base material layer is raised. In this case, the barrier layer (or base material layer) of the tape portion and the sealant layer are laminated via an intervening layer by extrusion lamination or dry lamination. When the sealant layer of the tape part and the base material layer of the main body part are thermally bonded, the heat seal strength is reduced and easy-opening adhesion is achieved. Here, the sealant layer having an easy peel property can adjust the heat seal strength with the base material layer by polymer alloy.

  As a film having such a sealant layer on the base material layer, for example, product numbers CMPS006, 009, 011C, 012C, 013C, and 017C of Easy Open Film (trade name) manufactured by Tosero Co., Ltd., manufactured by J Film Co., Ltd. Examples thereof include product numbers ZH31FT and SMX-ZH51 of VMX films (trade names), and product numbers E7700T and E3700T of differentials (trade names) manufactured by Dainippon Ink and Chemicals, Inc. In these laminated films, the heat seal strength in the case of easy opening is about 5 N / 15 mm to 15 N / 15 mm.

  In addition, instead of providing an easy-opening adhesive layer 54 on the tape portion as shown in FIG. 5 (1), a thermal adhesive resin layer using a thermoplastic resin similar to that of the main body portion is provided instead. On the base material layer bonded to the tape part of the main body part, a sealable layer having a low heat seal strength and easy opening when heat-sealed with the heat-adhesive resin layer may be provided. A sealable layer is a resin in which a predetermined resin layer is formed by coating and is thermoplastic, but it is a resin component that is different from the thermoadhesive resin layer and has relatively low compatibility and adhesiveness with the thermoadhesive resin. Use ingredients. For example, when the substrate layer is a PET film, a thermoplastic elastomer can be used as the sealable resin component, and the surface of the substrate layer can be coated to form a sealable layer. Examples of the film product of the base material layer having such a sealable layer include product number E7700 of an ester film (trade name) manufactured by Toyobo Co., Ltd. The heat seal strength is easily openable when the heat bonding temperature is in the range of 110 ° C. to 180 ° C. and about 1 N / 15 mm width to 5 N / 15 mm width.

  In addition, as a specific example in which a sealable layer is provided on one side when the base film is an OPP film, Toray Industries (trade name) product numbers M114 and M304 using a polyolefin-based sealable resin component are used. Product number HA20 manufactured by Santox Co., product number HC-OP of multilayer heat seal film (trade name) manufactured by Tosero Co., 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 mm width to 5 N / 15 mm width in the range of the heat bonding temperature of 110 ° C. to 180 ° C. Such a film can be used as a film of a base material layer on which a sealable layer is laminated.

  Next, instead of the sealable layer, a layer that can be easily opened and adhered may be partially provided by printing or partial coating only on the portion of the base material layer that can be easily opened and adhered. . For example, when the substrate layer is an OPP film, EVA, chlorinated PP, and acrylic adhesives can be used as the adhesive layer. 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 61 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 mm width to 5 N / 15 mm 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 sealing strength of the easy-open adhesive is about 1 N / 15 mm width to 5 N / 15 mm width.

  In addition, in order to adhere the tape part to the main body part using the adhesive that can be thermally bonded to the above easy-opening property, simply heat-sealing the tape part from the top of the main body part, the thermal bonding inside the main body part The heat-resistant resin layers are simultaneously heat-sealed, and the intended packaging material cannot be configured. For this reason, heat-seal the tape part before bag making, or make a bag, or insert a backing plate that cuts off heat of the heat seal after making the bag, and heat-seal only the tape part. You can do it.

  As described above, since the tape part having the barrier property equal to or better than that of the laminated film of the packaging material is used and the device is made to make it easy to open, both high barrier property and easy openability are achieved. It becomes possible.

  Next, an example of the packaging material bag making method will be described with reference to FIGS. 6 and 7. However, the bag making method is not limited to this, and various modifications are possible. First, in FIG. 6 (1), the long laminated film 10 used as a main-body part is prepared first, and this thermoadhesive resin layer is made into an inner side, and it bends in a C-C 'direction. (2) At that time, it is folded into a deformed hexagonal cylinder in which two opposite sides are folded inward. Further, two end sides parallel to the longitudinal direction of the laminated film constitute the butt 11. This abutment 11 serves as a package outlet. Further, the front end surface perpendicular to the longitudinal direction of the laminated film becomes the insertion port 12. (3) Next, the layer which becomes easy to open is the main body side, and the tape portion 20 is disposed from the outside of the hexagonal cylinder so as to cover the entire butted portion 11. (4) The heat seal receiving plate 70 is inserted for a predetermined length in the D direction from the inlet 12 of the hexagonal cylinder. Next, the heating end 71 of the heat sealer is pressed against the tape portion 20, and the tape portion 20 and the butt 11 are sandwiched between the inserted receiving plate and the heating end 71. In this state, the heating end 71 is heated to vertically heat seal the tape portion 20 to the main body portion. What is necessary is just to select heat sealing conditions suitably according to the material used to make it easy to open. (5) Next, the hexagonal cylinder is sandwiched between the heating end 73 of the heat sealer and the receiving plate 72 in a direction perpendicular to the longitudinal direction of the laminated film at a position corresponding to the length of the packaging material, and transverse heat sealing is performed. At this time, the portion where the tape portion overlaps is hard to be heat-sealed because the thickness is thicker than other portions. Therefore, it is preferable to set the conditions for the horizontal heat seal so that the temperature is about 30 ° C. to 50 ° C. higher than the vertical heat seal. When the transverse heat seal is completed, the end of the transverse heat seal portion far from the inlet 12 is cut to obtain the target packaging material.

  FIG. 7 is a schematic view of a continuous manufacturing process for concretely realizing another bag making method. In this process, the main body portion is folded into the deformed hexagonal cylinder after the tape portion 20 is bonded. By doing in this way, it becomes easy to make a packaging material more stably. First, the laminated film 10 serving as the main body is drawn from the raw roll 4 and flows in the K direction. The laminated film 10 drawn out from the raw roll 4 is formed into a cylindrical shape by two oblique rolls 80 so as to wrap the receiving plate 70. At that time, both ends of the laminated film in the K direction constitute the butt 11. The distance between the end portions of the butt 11 is preferably as small as possible, specifically, 1 mm or less. FIG. 7B shows a cross-sectional view of the molded state as seen from the G-G ′ direction.

  Subsequently, the tape unit 20 is pulled out from the tape roll 22 and is arranged outside the butt 11 in accordance with the butt 11. Subsequently, the vertical heat seal part 71 heat-seal the tape part 20 and the laminated film 10 of the main body part. FIG. 7 (3) shows an H-H ′ cross-sectional view in this state. The laminated film of the tape part 20 and the main body part is heat-sealed while being sandwiched between the heat sealer 71 and the receiving plate 70. Subsequently, a second vertical heat sealer 71 'performs a second vertical heat seal if necessary. Depending on the specifications of the packaging material, the adhesive force may be insufficient with a single vertical heat seal, so that the vertical heat seal can be performed again. Immediately after the end of the vertical heat seal, the cooling end 81 cools the vertical heat seal portion with tap water. Thereby, when a tape part is transparent, transparency improves and adhesive strength also improves.

  Subsequently, the two folding rolls 82 are formed into a deformed hexagonal cylinder having both ends folded from a cylindrical shape. A J-J ′ cross-sectional view in this state is shown in FIG. Subsequently, the transverse heat sealer 73 forms a sealed end 13 by transverse heat sealing at a predetermined interval so as to be the product length. The sealed end 13 is immediately cooled by a cooling end 83 using tap water. Furthermore, the packaging material 1 is completed by being cut by the cutter 84 at a portion immediately after the sealing end 13. By making a bag by such a process, the packaging material 1 can be stably produced continuously.

  In making a bag, two laminated films are used, the two end portions are butted together, and the tape portion is heat-sealed at the butting, and then a bag is made by making a backrest. May be. In this way, the packaging material has a back portion, but there is no need to insert a heat-seal receiving plate from the inlet. Various other variations are possible.

  The shape of the package is not limited to the shape of the gusset bag. Four-side seal bags and three-side seal bags that are similarly sealed on all four sides, a palm bag with a back in the center of the bag, and the bottom part folded into a W-shape. Bottom gusset bags that are heat-bonded at the bottom, standing bags that are bonded and folded by inserting another film on the bottom opposite to the opening, four-corner seal gusset bags that are inserted and heat-bonded on both sides and then folded Any format is possible and is not particularly limited. In any case, a packaging material from which such a package can be obtained may be produced in the same manner as in the example of the gusset bag.

  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.

  First, a laminated film for the main body was prepared. Prepare a 12-micron-thick PET film as a base layer, a 7-micron-thick aluminum foil as a barrier layer, and a 50-micron-thick LLDPE film as a thermal adhesive resin layer, and melt as these intervening layers A layer similar to that shown in FIG. 5 (2) is obtained by sandwiching the LDPE resin, extruding the three layers in the order described above so that the intervening layer has a thickness of 20 microns. A long laminated film having a configuration of 170 mm in width was obtained.

  Next, a film for the tape part was prepared. Easy peel as a film that can be easily opened and adhered to the base material layer, using a 12 micron thick PET film as the base layer and a 7 micron thick aluminum foil as the barrier layer, similar to the laminated film for the main body. A film (40 micron thickness, SMX-ZH51 manufactured by J Film Co., Ltd.) provided with a sealant layer having properties was prepared. Extrusion lamination was performed in the same manner as the laminated film for the main body so that these were in the order described. In addition, the red pigment was added to LDPE used for the intervening layer of PET film and aluminum foil, and the tape part was colored red. Next, this was cut into a width of 20 mm to obtain a long film for the tape portion.

  Next, using these films, bags were made in the same manner as described with reference to FIG. In addition, the width of the fold forming the modified hexagonal cylinder was set to be 30 mm in total, with the width of the surface provided with the tape portion being 55 mm and the portion to be folded inside being 15 mm + 15 mm. The butt was set so that the gap between the edges of the film was about 1 mm.

  The longitudinal heat seal temperature was set to 130 ° C., the transverse heat seal temperature was set to 180 ° C., and the heat seal time was set to 1 second. The width of the vertical heat seal was made equal to both sides with the butt at the center to make a total of 1 cm, and non-adhered portions were provided 5 mm on both sides in the length direction of the tape part. The width of the transverse heat-sealed portion in the longitudinal direction is set to 15 mm, and the boundary portion far from the inlet of the transverse heat-sealed portion is cut so that the total length of the packaging material in the longitudinal direction is 190 mm. A packaging material similar to that shown in 1 was obtained.

  A film with a lens (DKMN-27F) manufactured by Konica Minolta Photo Imaging Co., Ltd. having a length of about 110 mm, a width of about 55 mm, and a height of about 33 mm is inserted into the packaging material from the inlet, and the inlet is 15 mm wide. The package was obtained by heat sealing. In this package, the red tape portion can be clearly seen at the center in the length direction, and the portion to be opened can be clearly recognized.

  Holding this package with one hand and touching the edge of the tape with the finger of the other hand, it was immediately found that there was a non-adhesive part. When this was picked and peeled off from the main body part, the film with lens played a role of maintaining the shape of the package, and the tape part could be easily peeled off. After that, it was possible to easily take out the lens-attached film by widening the take-out port.

It is the perspective view which showed one example of the packaging material. It is the perspective view which showed the other example of the packaging material. It is the perspective view which showed one example of the package. It is the perspective view which showed the state which opened the package. (1) It is the schematic diagram which showed the example of the layer structure of each film of a tape part and (2) main-body part. It is the figure which showed the example of the manufacturing method of a packaging material with the perspective view of (1) to (5). It is the figure which showed the process for implement | achieving the other example of the manufacturing method of a packaging material.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 2, Packaging material 3 Packing body 4 Original fabric roll 5 Folding | wrapping 10,30 The laminated | multilayer film 11,31 of a main-body part or a main-body part Butting | matching 12,32 The inlet 13,14,33 40 Tape part 21, 41 Non-adhesive part 22 Tape roll 50 Laminated film 51, 61 Base layer 52, 62, 64 Intervening layer 53, 63 Barrier layer 54 Adhesive layer or adhesive layer 60 Laminated film of main part 65 Thermal Adhesive Resin Layers 70, 72 Receiving Plates 71, 71 ′, 73 Heating End 80 Diagonal Roll 81, 83 Cooling End 82 Folding Roll 84 Cutter

Claims (8)

  A main body portion that is composed of a laminated film having at least a base material layer, a barrier layer, and a heat-adhesive resin layer, and has an input port and a take-out port for the packaged product and can store the packaged product, and the takeout A tape portion that is bonded to the entire mouth from the outside of the main body so as to be easily opened, and the tape portion has a barrier property equal to or higher than that of the laminated film, and at least one side of the outer peripheral portion of the tape portion. And an easy-open packaging material having a knob portion that is not bonded to the main body.   The easy-open packaging material according to claim 1, wherein the take-out port extends over substantially the entire length of the main body.   The easy-open packaging material according to claim 1 or 2, wherein the take-out port is configured by butting the end portions of the laminated film.   The said tape part replaces the said thermoadhesive resin layer in the said laminated | multilayer film with the adhesive bond layer which becomes easily openable, The easily openability in any one of Claim 1 to 3 characterized by the above-mentioned. Packaging material.   The easy-open packaging material according to any one of claims 1 to 4, wherein the knob portion is provided along a length direction of the tape portion.   6. The easy-open packaging material according to claim 4 or 5, wherein the adhesive layer is a heat-adhesive easy-open adhesive layer.   The easy-open packaging material according to any one of claims 1 to 6, wherein the packaged product is a lens-attached film. 8. An easy-open packaging body, wherein the packaged material is charged into the packaging material according to claim 1 and sealed.

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