Container with clip chain and clip chain

Abstract

The present application provides a container with a chain belt, the chain belt has: a first base; a tear strip; a second base; a first engaging portion and a second engaging portion; and an easy-to-peel layer formed on the side of the first base of the second base extending compared with the first base, the first base is engaged with the film through the first engaging portion formed on the side of the first engaging portion opposite, the first engaging portion and the non-engaging portion or the weak engaging portion transversely cutting the first base in the width direction are alternately arranged in the length direction of the first base, the second base is engaged with the film through the second engaging portion formed on the part extending compared with the tear strip on the first side and the third engaging portion formed on the easy-to-peel layer, and the second engaging portion and the third engaging portion are continuously formed in the length direction.

Description

Technical Field

[0001] This invention relates to containers with zippered belts and zippered belts. Background Technology

[0002] For example, in containers with resealable straps that circulate while filled with contents, techniques have been proposed to prevent the contents from adhering to the resealable strap before opening. For instance, Patent Document 1 describes a retort pouch with a resealable strap heat-sealed on the upper inner side of the side film for resealing the cooking liquid. Continuously attached to the strap is an easy-peeling portion for further sealing the cooking liquid and preventing it from adhering to the strap. A non-sealing portion is formed on the strap to allow steam to pass through, allowing hot air to escape from the retort pouch when the contents are heated.

[0003] On the other hand, for example, Patent Document 2 describes a bag body that, by joining two components of a zipper belt to one side of the container body, allows contents to be filled without using the zipper portion before the top seal is formed. After the top seal is formed, an opening communicating with the zipper portion is formed by pulling a tear guide provided on one side of the container body, allowing contents to be removed and inserted through the opening, and the container to be closed and reopened via the zipper.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent No. 6139086

[0007] Patent Document 2: International Publication No. 2023 / 080078 Summary of the Invention

[0008] The problem that the invention aims to solve

[0009] The container described in Patent Document 1 has the base of the zipper fixed to both sides of the cooking bag, requiring the zipper to be opened when filling with cooking liquid. Therefore, when initially installed with the zipper closed, this involves a complex process of opening the zipper, filling with cooking liquid, closing the zipper, and then heat-sealing the easily detachable portion. In contrast, the container described in Patent Document 2 simplifies the process by simply filling with the contents while the zipper is closed and forming a top seal. However, the container described in Patent Document 2 lacks a structure for venting steam when the contents are heated, and there is no indication of its application.

[0010] Therefore, the object of the present invention is to provide a container and a chain belt that can prevent the contents from adhering to the chain before opening, can fill the contents without opening the chain, and can release steam when heated.

[0011] Methods for solving problems

[0012] [1] A container with a zipper belt, wherein the zipper belt is mounted on a membrane forming the container body, wherein the zipper belt comprises: a first base; a tear strip disposed on a first side in the width direction of the first base; a second base including a portion extending on the first side relative to the tear strip, and a portion extending on a second side opposite to the first side relative to the first base; a first engaging portion and a second engaging portion protruding from the first base and the second base respectively and capable of engaging with each other; and an easy-peel layer formed on the surface of the second base extending on the second side relative to the first base, wherein the first base is engaged with the membrane by a first engagement portion formed on the surface opposite to the first engagement portion, wherein the first engagement portion and a non-engaged portion or weakly engaged portion transversely cutting the first base in the width direction are alternately disposed in the length direction of the first base, wherein the second base is engaged with the membrane by a second engagement portion formed on the portion extending on the first side relative to the tear strip and a third engagement portion formed on the easy-peel layer, wherein the second engagement portion and the third engagement portion are continuously formed in the length direction.

[0013] [2] The container with a zipper belt according to [1], wherein the non-joining portion or the weakly joined portion comprises: a first non-joining portion or weakly joined portion which is continuously formed in the length direction of a portion of the width direction of the first base; and a second non-joining portion or weakly joined portion which is alternately disposed with the first joined portion in the length direction of the remaining portion of the width direction of the first base.

[0014] [3] A container with a chain strap according to [1] or [2], wherein the tear strip is continuously formed with the first base and is joined to the membrane by a fourth joint continuously formed in the length direction.

[0015] [4] A chain strap, wherein the chain strap comprises: a first base; a tear strip disposed on a first side in the width direction of the first base; a second base including a portion extending on the first side relative to the tear strip, and a portion extending on a second side opposite to the first side relative to the first base; a first engaging portion and a second engaging portion protruding from the first base and the second base respectively and capable of engaging with each other; an easy-peel layer formed on the surface of the second base extending on the second side relative to the first base, wherein a non-engaging portion or a weakly engaging portion is formed on the surface of the first base opposite to the first engaging portion, the non-engaging portion or the weakly engaging portion being alternately disposed with an engaging portion in the length direction of the first base and transversely cutting the first base in the width direction.

[0016] [5] According to the chain belt of [4], wherein the non-joining portion or the weakly joined portion comprises: a first non-joining portion or weakly joined portion which is continuously formed in the length direction of a portion of the width direction of the first base; and a second non-joining portion or weakly joined portion which is alternately disposed with the joined portion in the length direction of the remaining portion of the width direction of the first base.

[0017] [6] According to the chain belt of [4] or [5], wherein the tear strip is formed continuously with the first base, and at least a portion of the tear strip in the width direction is not formed with the non-joint portion or the weak joint portion.

[0018] According to the above structure, by engaging both the first base and the second base with the same surface of the container body, the contents can be filled even without opening the zipper. Furthermore, by engaging the easily peelable layer formed on the surface of the second base on the side of the first base with the same surface of the container body as the first base, it is possible to prevent the contents from adhering to the zipper before opening. Moreover, by forming a non-engaged or weakly engaged portion on the side of the first base that cuts across its width in the opposite direction to the first engaging portion, steam can be released during heating. Attached Figure Description

[0019] Figure 1 This is a top view of a container with a zipper strap according to an embodiment of the present invention.

[0020] Figure 2 It is along Figure 1 A sectional view along line II-II.

[0021] Figure 3 It means Figure 1 The diagram shows the state of the contents of a container with a zipper strap when it is sealed.

[0022] Figure 4 It means Figure 1 The diagram shows the state of a container with a zipper strap when it is opened.

[0023] Figure 5A It is used for more detailed explanation. Figure 1 The diagram shows the bonding state between the zipper tape and the membrane in a container with a zipper tape.

[0024] Figure 5B It is used for more detailed explanation. Figure 1 The diagram shows the bonding state between the zipper tape and the membrane in a container with a zipper tape.

[0025] Figure 6 This is a cross-sectional view showing an example of a chain strap according to an embodiment of the present invention.

[0026] Figure 7 This is a cross-sectional view showing a modified example of the zipper belt according to an embodiment of the present invention.

[0027] Figure 8 This is a cross-sectional view showing another modified example of the chain belt according to an embodiment of the present invention.

[0028] Figure 9A This is another example of the bonding state between the zipper tape and the membrane, used to illustrate the situation in more detail.

[0029] Figure 9B This is another example of the bonding state between the zipper tape and the membrane, used to illustrate the situation in more detail. Detailed Implementation

[0030] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that in this specification and the accompanying drawings, structural elements having substantially the same functional structure are labeled with the same reference numerals, thereby omitting repeated descriptions.

[0031] Figure 1 This is a top view of a container with a zipper strap according to an embodiment of the present invention. Figure 2 It is along Figure 1 A cross-sectional view along line II-II. As shown, the container 100 with a zipper strap includes: a bag-shaped container body formed of a membrane 110 having a first surface 111A facing the storage space SP; and a zipper strap 120 engaged with the first surface 111A.

[0032] In the illustrated example, membrane 110, in addition to the first surface 111A, has a second surface 111B opposite to the first surface 111A, with both the first surface 111A and the second surface 111B facing the receiving space SP. Membrane 110 is formed, for example, from a single layer or multiple layers of thermoplastic resin. More specifically, membrane 110 is formed, for example, from polypropylene or high-density polyethylene (HDPE), linear low-density polyethylene (LLDPE). Polypropylene is, for example, homopolymer polypropylene (HPP), random polypropylene (RPP), or block polypropylene (BPP). When membrane 110 is multilayered, the surface substrate can be biaxially oriented polypropylene (OPP), biaxially oriented polyethylene terephthalate (OPET), or biaxially oriented nylon (ONy). These are not limited to resins derived from fossil fuels; they can be environmentally friendly bioplastics (biopolymer polypropylene, biopolymer polyethylene, and other polyolefin resins derived from biomass), or mixtures of resins derived from fossil fuels and bioplastics. Membrane 110 may also include inorganic material layers formed by aluminum vapor deposition, lamination of aluminum foil, etc.

[0033] It should be noted that in the illustrated example, two films 110 are joined together at the top sealing portion 112, the bottom sealing portion 113, and the side sealing portion 114 to form a bag-shaped container body. However, in other examples, a bag-shaped container body can also be formed by folding back a single film 110 at the portion corresponding to the side sealing portion 114. Additionally, a portion of the film 110 folded inward, known as a gusset, can be formed at the portion corresponding to the bottom sealing portion 113 or the side sealing portion 114. In this case, the gusset can be formed by the film 110 itself or by another film joined to the film 110. Furthermore, the container 100 with a zipper strap can also be a stand-up pouch that can be upright by forming a gusset at the bottom.

[0034] The zipper tape 120 is engaged with the first surface 111A of the film 110. Specifically, the portion of the second base 121B that extends relative to the tear strip 123 (in the illustrated example, the portion with the thick wall portion 125B), the tear strip 123 (in the illustrated example, the side of the strip body 123A opposite to the easy-peel layer 123C), the side of the first base 121A opposite to the first engaging portion 122A, and the easy-peel layer 124 formed on the portion of the second base 121B that extends relative to the first base 121A on the side opposite to the tear strip 123 are engaged with the first surface 111A.

[0035] like Figure 2As shown in the cross-sectional view, the chain tape 120 includes base portions 121A and 121B, engaging portions 122A and 122B, tear strips 123, and an easy-peel layer 124. Base portions 121A and 121B are formed of a first resin composition primarily composed of a polyolefin resin, specifically, for example, polypropylene. For example, the first resin composition may contain low-density polyethylene (LDPE) or linear low-density polyethylene (LLDPE). At least a portion of the LDPE or LLDPE may also be bio-polyethylene. The polyolefin resin as the main component of the first resin composition is not limited to resins derived from fossil fuels, but may be environmentally friendly bioplastics (biopolymer polypropylene, bioethylene, etc., derived from biomass), or a mixture of resins derived from fossil fuels and bioplastics. Known additives, such as stabilizers, antioxidants, lubricants, antistatic agents, or colorants, may be added to the first resin composition as needed.

[0036] The engaging portions 122A and 122B are portions that protrude from the bases 121A and 121B respectively and are capable of engaging with each other. In the illustrated example, the first engaging portion 122A has a convex profile, and the second engaging portion 122B has a concave profile, but the opposite is also possible. Furthermore, not limited to convex and concave shapes, various known zipper engaging portions such as claw-shaped, hook-shaped, or nodular shapes can also be used. In the illustrated example, a pair of engaging portions is provided, but multiple pairs of engaging portions can also be provided. The engaging portions 122A and 122B are formed, for example, from the same first resin composition as the bases 121A and 121B described above, but a resin composition different from the first resin composition can also be used.

[0037] The tear strip 123 is disposed on the first side in the width direction of the first base 121A (in Figure 2 (The upper side is shown in the image). As described later, the tear strip 123 separates from and is pulled from the first base 121A when the container is opened. Therefore, the tear strip 123 and the first base 121A can also be connected or separated through the thin-walled portion shown in the figure. More specifically, the tear strip 123 can also be... Figure 2 As shown in the example, it is formed into the same component as the first base 121A via a thin-walled portion. Figure 2In the example shown, the thin-walled portion connecting the tear strip 123 to the first base 121A engages with the first surface 111A, but a gap may also exist between the thin-walled portion and the first surface 111A. In other examples, the tear strip 123 may also be stacked near the end of a first side in the width direction of the first base 121A. In this case, when pulled, the tear strip 123 tears not only the first surface 111A but also a portion of the first base 121A, forming an opening in the container body. Alternatively, the tear strip 123 may be arranged parallel to the first base 121A as a separate component. In this case, the tear strip 123 may also be stacked on the second base 121B as in the example described later.

[0038] In the illustrated example, the tear strip 123 includes a strip body 123A and an easy-peel layer 123C laminated on the side of the strip body 123A opposite to the second base 121B. A bonding layer 123B may also be included between the strip body 123A and the easy-peel layer 123C. In this case, the strip body 123A is formed from a first resin composition, for example, in the same manner as the first base 121A. The easy-peel layer 123C is formed from a resin composition that is peelable relative to the first resin composition forming the second base 121B, and the bonding layer 123B is formed from a resin composition capable of bonding the strip body 123A and the easy-peel layer 123C. For example, as described above, when the first resin composition is primarily polypropylene, the easy-peel layer 123C is formed from a resin composition primarily polyethylene. In this case, the entire tear strip 123 may also be formed from a resin composition primarily polyethylene, omitting the easy-peel layer 123C.

[0039] It should be noted that, in the above description, an example of the first resin composition forming the bases 121A and 121B being primarily composed of polypropylene has been given. However, in other examples, the primary component of the first resin composition may also be other polyolefin resins, such as polyethylene. In this case, when the tear strip 123 includes a strip body 123A and an easy-peel layer 123C, the easy-peel layer 123C may be formed from a resin composition primarily composed of polypropylene. Alternatively, the primary component of the first resin composition may also be a resin other than a polyolefin resin.

[0040] As shown in the figure, with the bases 121A and 121B in a predetermined configuration, the second base 121B includes a portion extending beyond the tear strip 123 on a first side in the width direction of the first base 121A, and also on a second side opposite to the first side (in... Figure 2The lower side (in the middle) also includes a portion extending beyond the first base 121A. Here, the prescribed configuration of the bases 121A and 121B is defined, for example, as a state where the engaging portions 122A and 122B engage with each other. However, the engaging portions 122A and 122B do not necessarily need to engage, as long as their positions are aligned in the width direction of the bases 121A and 121B. In the illustrated example, on the first side described above, the second base 121B forms a thick-walled portion 125B in the portion extending beyond the tear strip 123. Additionally, a thick-walled portion 125A is also formed on the first side of the first base 121A, i.e., the end on the tear strip 123 side. By forming these thick-walled portions 125A and 125B, the pulling of the tear strip 123 during opening can be guided, more reliably forming an opening of the desired shape, but these portions can also be omitted.

[0041] On the second side described above, an easy-peel layer 124 is formed on the portion extending from the first base 121A compared to the second base 121B. The easy-peel layer 124 is formed of a second resin composition different from the first resin composition forming the bases 121A and 121B. Specifically, the second resin composition is a resin composition that has peelability relative to the membrane (first surface 111A) of the container body. It should be noted that, in this specification, "having peelability" means a peel strength relative to an object of 30 N / 15 mm or less. In this case, the peel strength is preferably 20 N / 15 mm or less, more preferably 15 N / 15 mm or less, and even more preferably 10 N / 15 mm or less. The lower limit of the peel strength is not particularly limited, for example, it is 1 N / 15 mm or more. More specifically, the peel strength is measured using a thermal tilt tester. The peel strength between the easy-peel layer 124 and the membrane, when sealed at 230°C and 0.2 MPa for 1 second, is 30 N / 15 mm or less.

[0042] In the illustrated example, a thick-walled portion 126 is formed on the second side of the first base 121A, that is, at the end near the easily peelable layer 124. By forming the thick-walled portion 126, the thickness of the zipper tape 120, including the engaging portions 122A and 122B, the tear strip 123, etc., can be made uniform throughout in the width direction. For example, when the zipper tape 120 is joined to the membrane of the container body by clamping it with a sealing strip in the thickness direction, the portions of the zipper tape 120 can be joined to the membrane more reliably. The thick-walled portion 126 is formed to be thicker than other portions of the first base 121A, for example. The thickness difference is preferably 100 μm or more, more preferably 200 μm or more, and even more preferably 300 μm or more. There is no particular upper limit to the ratio of the thickness difference, but it is 600 μm or less when taking into account the size of the typical engaging portions 122A and 122B.

[0043] The aforementioned chain strap 120 is manufactured, for example, by extrusion molding. In this case, a first resin composition forming the bases 121A and 121B and a second resin composition forming the easy-peel layer 124 are co-extruded. In this case, a bonding layer may also be laminated between the second base 121B and the easy-peel layer 124. The bonding layer is formed of a resin composition capable of bonding the second base 121B and the easy-peel layer 124. Alternatively, the chain strap 120 may also be manufactured by coating the second resin composition after forming the portion including the bases 121A and 121B using extrusion molding of the first resin composition to form the easy-peel layer 124. In this case, an intermediate layer may also be formed by coating the second base 121B and the easy-peel layer 124 with another resin composition.

[0044] Here, as described above, the easy-peel layer 124 is formed of a resin composition (second resin composition) that is peelable relative to the film 110 including the first surface 111A. The portions of the aforementioned chain strap 120 are bonded to the first surface 111A, for example, by heat sealing or ultrasonic sealing. In this case, the easy-peel layer 124 and the first surface 111A can also be heat-sealed at a lower temperature than other portions of the chain strap 120. Furthermore, in the illustrated example, the easy-peel layer 124 is bonded only to the first surface 111A, but it can also be partially bonded to the first base 121A (in the illustrated example, the thick-walled portion 126).

[0045] The second resin composition forming the peelable layer 124 comprises, for example, low-density polyethylene (LDPE) or linear low-density polyethylene (LLDPE). The first resin composition forming the bases 121A and 121B may also comprise LDPE or LLDPE, but in this case, the blending of LDPE or LLDPE between the first and second resin compositions differs. As described above, the peelable layer 124 has peelability relative to the film 110; specifically, the peel strength between the peelable layer 124 and the film 110 is 30 N / 15 mm or less. In this case, the peel strength is preferably 20 N / 15 mm or less, more preferably 15 N / 15 mm or less, and even more preferably 10 N / 15 mm or less. The lower limit of the peel strength is not particularly limited, for example, it is 1 N / 15 mm or more. To adjust the peel strength between the peelable layer 124 and the film 110, polypropylene may be blended into the LDPE or LLDPE in the second resin composition. In this case, the polypropylene is homopolymer polypropylene (HPP), random polypropylene (RPP), block polypropylene (BPP), propylene-ethylene-butene 1 random terpolymer, or a mixture of polyolefin-based special soft resins (TPO resins). Not limited to the examples above, the second resin composition can also be a composition containing other components that have peelability relative to the film 110. It should be noted that the easy-peel layer 123C and easy-peel layer 124 of the tear strip 123 can be formed from the same resin composition or from different resin compositions.

[0046] Figure 3 It means Figure 1 and Figure 2 The diagram illustrates the state of the container with the zipper strap when the contents are sealed. In the illustrated example, the top seal 112 is not yet formed when the contents are sealed, so the contents can be stored in the storage space SP without using the zipper strap 120. By forming the top seal 112 after the contents are stored, as... Figure 2 As shown, the storage space SP containing the contents can be sealed when the easy-peel layer 124 of the base 121B is engaged with the first surface 111A of the membrane 110. In this state, the engaging portions 122A and 122B of the zipper belt 120 are isolated from the storage space SP by the engagement of the easy-peel layer 124 with the first surface 111A. In other examples, the contents can be stored in the storage space SP without forming the bottom sealing portion 113, and the storage space SP can be sealed by forming the bottom sealing portion 113 after storing the contents.

[0047] Figure 4 It means Figure 1 and Figure 2The diagram shows the state of the container with the zipper strap when it is opened. When the container 100 with the zipper strap is opened, the first surface 111A of the film 110 can be torn by pulling the tear strip 123 starting from the protrusion formed by the cut 131 as described above, thus forming an opening 101 in the container 100 with the zipper strap. The engagement of the locking portions 122A and 122B is released by widening the base portions 121A and 121B from the opening 101 side, thereby allowing the easy-peel layer 124 formed on the base portion 121B to be peeled off from the first surface 111A, thereby allowing the storage space SP to be accessed from the outside. As described above, during the period when the easy-peel layer 124 is engaged with the first surface 111A before opening, the locking portions 122A and 122B are isolated from the storage space SP, so the contents will not adhere to the locking portions 122A and 122B when opening. As a specific application, for example, in Figure 3 In the state shown, an opening 101 is formed in the container 100 with a chain strap that has been pre-sealed with cooking liquid. Figure 4 In the state shown, food ingredients are added and sealed into the storage space SP through the opening 101. Then, the locking parts 122A and 122B are locked again, which allows the food ingredients and cooking liquid to be heated together.

[0048] Figure 5A and Figure 5B It is used for more detailed explanation. Figure 1 A diagram showing the bonding state between the zipper tape and the membrane in a container with a zipper tape. Figure 5A and Figure 5B The diagram illustrates the length direction (x direction), width direction (y direction), and thickness direction (z direction) of the zipper tape 120 (including the first base 121A and the second base 121B).

[0049] Figure 5A Corresponding to Figure 3 The state is shown. The first base 121A is joined to the first surface 111A of the membrane 110 by a first engagement portion 141 formed on the surface opposite to the first engagement portion 122A. The first engagement portion 141 is alternately arranged with a non-engagement portion 142 in the length direction of the first base 121A. The non-engagement portion 142 is transversely cut across the first base 121A in the width direction. Regarding the effect of such a non-engagement portion 142, see [reference needed]. Figure 5B As will be described later. On the other hand, the second base 121B is joined to the first surface 111A by a second joint 143 formed on the portion extending from the first side in the width direction compared to the first base 121A, specifically the thick-walled portion 125B, and a third joint 144 formed on the easily peelable layer 124. The second joint 143 and the third joint 144 are continuously formed in the length direction of the first base 121A, thus, as described above, it is possible to prevent contents from adhering to the engaging portions 122A and 122B.

[0050] It should be noted that when "the first joint portion 141 is alternately arranged with the non-joint portion 142 in the length direction (x direction) of the first base portion 121A", it is not limited to the first joint portion 141 and the non-joint portion 142 being parallel to the width direction (y direction) of the first base portion 121A as shown in the figure, and it also includes the case where they are inclined relative to the width direction. It is also possible that the first joint portion 141 and the non-joint portion 142 are not alternately arranged in the entire length direction (x direction) of the first base portion 121A; for example, the first joint portion 141 and the non-joint portion 142 may only be alternately arranged in a portion such as near the center in the length direction (x direction). Furthermore, it is also possible that the first joint portion 141 and the non-joint portion 142 are not only alternately arranged in the length direction (x direction) of the first base portion 121A; for example, the first joint portion 141 and the non-joint portion 142 may be alternately arranged in the width direction (y direction), and the first joint portion 141 and the non-joint portion 142 may be arranged in a grid pattern on a plane (xy plane) including both the length direction and the width direction. In terms of ease of processing of the non-joining portion, it is preferable to have a structure in which the first joining portion 141 and the non-joining portion 142 are parallel to the width direction (y direction) of the first base portion 121A and alternately arranged in the length direction (x direction), as shown in the example illustrated.

[0051] Figure 5B Shown in Figure 4 The state shown is one in which the engaging portions 122A and 122B re-engage after the opening 101 is formed in the container body and the easily peelable layer 124 is peeled off from the first surface 111A. If the contents (e.g., cooking liquid and ingredients) are heated in this state using a microwave oven or similar appliance, the internal pressure of the storage space SP increases due to the generation of steam. Air containing the generated steam (hereinafter, simply referred to as steam) then exits from the opening 101 through the non-jointing portion 142, formed by transversely cutting the first base 121A across the first surface 111A in the width direction. At the first joining portion 141, the engagement between the first base 121A and the first surface 111A is maintained during steam discharge, thereby stabilizing steam release. More specifically, this prevents container deformation due to an excessively wide steam outlet or a decrease in heating and cooking efficiency due to excessive steam discharge.

[0052] It should be noted that the non-bonded portion 142 in the above examples can also be a weakly bonded portion formed in the same way as the easily peelable layer 124. In this case, when the internal pressure of the storage space SP rises, the bond at the weakly bonded portion is broken, forming a non-bonded portion that cuts across the first base 121A in the width direction, and steam is discharged from this non-bonded portion. In these examples, the non-bonded portion 142 and the weakly bonded portion cut across the first base 121A in the width direction, but the first bonded portion 141 does not necessarily have to cut across the first base 121A in the width direction. For example, a connecting path can be formed between the parallel non-bonded portions 142 and the weakly bonded portions in the middle of the width direction of the first base 121A, thereby dividing the first bonded portion 141.

[0053] It should be noted that, in Figure 5A In the example shown, the tear strip 123 is joined to the first surface 111A by a fourth joint 145 continuously formed along the length of the first base 121A. In this case, at least a portion of the tear strip 123 in the width direction is not formed with a non-jointing portion 142. Figure 5B As shown, the tear strip 123 is removed when the opening 101 is formed, so the shape of the joint of the tear strip 123 is not particularly limited. In order to further reduce the possibility of resin flow blocking the non-joint portion 142 on the first base 121A side when the joint is formed, the first joint portion 141 and the non-joint portion 142 may be extended in part or all of the width direction of the tear strip 123.

[0054] Figure 6 This is a cross-sectional view showing an example of a zipper belt according to an embodiment of the present invention. As described above, the present invention can also be implemented using a zipper belt 120, which is a membrane attached to the container body and used to construct a container with a zipper belt. Figure 6 The structure and reference of each part of the chain strap 120 shown Figure 2 The structures described are the same, therefore repeated detailed descriptions are omitted. In the zipper belt 120, there may also be non-joining or weakly joined portions that are alternately arranged with the joining portions in the length direction of the first base 121A and transversely cut across the first base 121A in the width direction. The non-joining or weakly joined portions of the zipper belt 120 before joining with the film are, for example, connected with... Figure 5AThe non-bonding portion 142 or weak bonding portion, as illustrated, appears on the chain strap 120 in areas containing resin materials with low bonding strength to the film, or resin materials that do not melt at the normal sealing temperature between the other parts of the first base 121A and the film due to their high melting point. Such portions other than the non-bonding portion or weak bonding portion become bonding portions that can be bonded to the film by normal heat sealing or the like. The non-bonding portion 142 and weak bonding portion can also be formed by making the sealing strip that bonds the chain strap 120 to the film into a slit shape, etc. In this case, the non-bonding portion and weak bonding portion may not be formed on the first base 121A before the chain strap 120 bonds to the film.

[0055] Figure 7 This is a cross-sectional view showing a modified example of the zipper belt according to an embodiment of the present invention. Figure 7 The difference between the shown zipper tape 120 and the example described above is that the tear strip 123 is separated from the first base 121A and stacked on the second base 121B. Otherwise, the structure is the same as the example described above. In this case, the tear strip 123 consists of an easy-peel layer 123C, a bonding layer 123B, and a strip body 123A, stacked sequentially from the second base 121B side. When the first base 121A and the second base 121B are joined to the first surface 111A of the container body, the tear strip 123 is also joined to the first surface 111A via the strip body 123A.

[0056] Figure 8 This is a cross-sectional view showing another modified example of the chain belt according to an embodiment of the present invention. Figure 8 The difference between the shown zipper belt 120 and the example above is that a thick-walled portion 126 is not formed in the first base 121A. Other than this, the structure is the same as... Figure 6 The example shown or Figure 7 The example shown is the same.

[0057] Figure 9A and Figure 9B This is another diagram used to illustrate in more detail the bonding state between the zipper tape and the membrane. Figure 9A and Figure 9B The diagram illustrates the length (x-direction), width (y-direction), and thickness (z-direction) of the zipper tape 120 (including a first base 121A and a second base 121B). It should be noted that the second joint 143 between the second base 121B and the first surface 111A, and the third joint 144 with… Figure 5A as well as Figure 5B The example shown is the same.

[0058] exist Figure 9AIn the example shown, the first base 121A is joined to the first surface 111A of the membrane 110 via a first engaging portion 141 formed on the surface opposite to the first engaging portion 122A. In a portion of the width direction of the first base 121A, specifically on the side of the storage space SP, a first non-engaging portion 142A is continuously formed in the length direction of the first base 121A; in the remaining portion, the first engaging portion 141 and a second non-engaging portion 142B are alternately arranged. The second non-engaging portion 142B, together with the first non-engaging portion 142A, transversely cuts across the first base 121A in the width direction. Figure 9B As shown, in this example, after the connection between the opening 101 and the easily peelable layer 124 and the first surface 111A is broken, when the internal pressure of the storage space SP rises due to the heating of the contents, steam can also be discharged from the opening 101 through the non-connection portions 142A and 142B. In addition, by maintaining the connection at the first connection portion 141, the discharge of steam can be stabilized.

[0059] It should be noted that, Figure 9A as well as Figure 9B In the example, the non-bonded portions 142A and 142B can also be weakly bonded portions, for example, formed in the same way as the easily peelable layer 124. Additionally, in Figure 9A and Figure 9B The above is illustrated in the diagram. Figure 8 The zipper belt shown is 120, but... Figure 6 and Figure 7 The same structure can also be used in the chain strap shown.

[0060] Explanation of reference numerals in the attached figures:

[0061] 100… Container with zipper belt, 101… Opening, 110… Membrane, 111A… First side, 111B… Second side, 112… Top seal, 113… Bottom seal, 114… Side seal, 120… zipper belt, 121A… First base, 121B… Second base, 122A… First engaging part, 122B… Second engaging part, 123… Tear strip, 123A… Strip body, 123B… Bonding layer, 123C… Peelable layer, 124… Peelable layer, 125A, 125B, 126… Thick wall portion, 141… First bonding portion, 142… Non-bonding portion, 142A… First non-bonding portion, 142B… Second non-bonding portion, 143… Second bonding portion, 144… Third bonding portion, 145… Fourth bonding portion.

Claims

1. A container with a zipper belt, wherein a zipper belt is installed on a membrane forming the container body, wherein, The chain strap has: First base; A tear strip is disposed on a first side in the width direction of the first base; The second base includes a portion extending on the first side relative to the torn strip, and a portion extending on the second side opposite to the first side relative to the first base; The first engaging portion and the second engaging portion protrude from the first base and the second base respectively and are capable of engaging with each other; as well as An easily peelable layer is formed on the surface of the second base extending from the first base relative to the second base. The first base portion engages with the membrane via a first engagement portion formed on the side opposite to the first engagement portion. The first joint portion and the non-joint portion or weak joint portion that cuts across the first base portion in the width direction are alternately arranged in the length direction of the first base portion. The second base is engaged with the film via a second engagement portion formed on the portion extending from the first side compared to the tear strip and a third engagement portion formed on the easy-peel layer. The second joint and the third joint are formed continuously in the length direction.

2. The container with a zippered strap according to claim 1, wherein, The non-jointed portion or the weakly joined portion includes: A first non-joined or weakly joined portion, which is formed continuously in the length direction of a portion of the width direction of the first base; and The second non-joining or weakly joined portion, the remaining portion of which in the width direction of the first base is alternately arranged with the first joined portion in the length direction.

3. The container with a zippered strap according to claim 1 or 2, wherein, The tear strip is continuously formed with the first base and is joined to the membrane by a fourth joint that is continuously formed in the length direction.

4. A chain strap, wherein, The chain strap has: First base; A tear strip is disposed on a first side in the width direction of the first base; The second base includes a portion extending on the first side relative to the torn strip, and a portion extending on the second side opposite to the first side relative to the first base; The first engaging portion and the second engaging portion protrude from the first base and the second base respectively and can engage with each other; as well as An easily peelable layer is formed on the surface of the second base extending from the first base relative to the second base. A non-engaging portion or a weakly engaging portion is formed on the side of the first base opposite to the first engaging portion. The non-engaging portion or the weakly engaging portion is alternately arranged with the engaging portion in the length direction of the first base and transversely cuts the first base in the width direction.

5. The chain strap according to claim 4, wherein, The non-jointed portion or the weakly joined portion includes: A first non-joined or weakly joined portion, which is formed continuously in the length direction of a portion of the width direction of the first base; and The second non-joining or weakly joined portion, the remaining portion of the first base in the width direction, is alternately arranged with the joined portion in the length direction.

6. The chain strap according to claim 4 or 5, wherein, The tear strip is formed continuously with the first base. At least a portion of the tear strip in the width direction does not form the non-jointed portion or the weakly joined portion.

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