TW202600427A - Chain straps, films having chain straps, containers having chain straps, and methods for manufacturing containers having chain straps. - Google Patents

Abstract

This invention provides a chain strap having a first component and a second component. The first component, in cross-sectional shape, includes a first fastening portion, a first flange extending from the first fastening portion to a first side in the width direction of the chain strap, and a second flange extending from the first fastening portion to a second side in the width direction. The second component, in cross-sectional shape, includes a component that can interact with the first... The second fastening portion and the third flange portion extending from the second fastening portion to the first side may include a fourth flange portion extending from the second fastening portion to the second side and being shorter than the second flange portion, or may not include a flange portion extending from the second fastening portion to the second side, and the thickness of at least a portion of the second flange portion in the width direction is greater than the maximum thickness of the first flange portion.

Description

Chain straps, films having chain straps, containers having chain straps, and methods for manufacturing containers having chain straps.

This invention relates to a chain conveyor, a film having a chain conveyor, a container having a chain conveyor, and a method for manufacturing a container having a chain conveyor.

For example, as described in document 1 (International Publication No. 2018/207631), a method for manufacturing a container with a reel tape is known, which involves winding a film pre-attached with a reel tape onto a core and joining the two ends of the film to form the container body. In this manufacturing method, a filling device for the contents can also be assembled into the core and the contents can be filled simultaneously with the manufacturing of the container.

In a manufacturing method such as that described in document 1, a film with a chain strap is conveyed along the width direction of the chain strap and wound onto a core. However, sometimes the flange extending from the fastening portion of the chain strap may curl, or the fastening portion may open as the flange curls.

Therefore, the purpose of this invention is to provide a chain strap that can effectively prevent the flange from curling during container manufacturing, a film having a chain strap, a container having a chain strap, and a method for manufacturing a container having a chain strap.

[1] A chain strap comprising a first component and a second component, wherein the first component, in cross-sectional shape, includes a first fastening portion, a first flange extending from the first fastening portion to a first side in the width direction of the chain strap, and a second flange extending from the first fastening portion to a second side in the width direction; the second component, in cross-sectional shape, includes a component capable of fastening with the first fastening portion. The second fastening portion and the third flange portion extending from the second fastening portion to the first side may include a fourth flange portion extending from the second fastening portion to the second side and being shorter than the second flange portion, or may not include a flange portion extending from the second fastening portion to the second side; and the thickness of at least a portion of the second flange portion in the width direction is greater than the maximum thickness of the first flange portion.

[2] As described in [1], a chain belt wherein a thick-walled portion is formed at the second flange portion, and the thickness of the second flange portion at the thick-walled portion is greater than the thickness of the thick-walled portion or tab formed at the first flange portion; when the second component includes the fourth flange portion, the thick-walled portion is formed in the area of the second flange portion that is not opposite to the fourth flange portion.

[3] As described in [1] or [2], a tab is formed on the second flange portion, the thickness of the second flange portion at the tab is greater than the thickness of the tab or thick wall portion formed on the first flange portion; when the second component includes the fourth flange portion, the tab is formed in the area of the second flange portion that is not opposite to the fourth flange portion.

[4] The chain belt described in any of [1] to [3], wherein the difference between the thickness of at least a portion of the second flange portion in the width direction and the maximum combined thickness of the first flange portion and the third flange portion is less than 100 μm.

[5] The chain belt described in any of [1] to [4], wherein the second component includes the fourth flange portion, the length of which is 4 mm or less.

[6] A chain strap as described in any of [1] to [5], wherein the third flange portion is formed in cross-sectional shape to be longer than the first flange portion, and further has a tear strip disposed between the first fastening portion and the end of the third flange portion on the first side.

[7] As described in [6], the tear strip is provided in a portion of the area of the third flange that is not opposite to the first flange.

[8] As described in [6], the chain belt has the tear strip provided at the end of the first side of the first flange portion.

[9] As described in [6], the first end of the first flange portion on the first side constitutes the tear strip, and a peeling layer is provided between the tear strip and the third flange portion.

[10] A film having a reel tape, wherein at least a portion of each of the first flange portion and the second flange portion, and at least a portion of the area of the third flange portion that is not opposite to the first flange portion, are joined to the film.

[11] A film having a chain strap as described in [10], wherein a tab is formed in a portion of the length direction of the chain strap by a cut that traverses the tear strip; a protective film is disposed on the opposite side of the film covering at least a portion of the length direction of the chain strap containing the tab; and the protective film is bonded to at least a portion of the film, the third flange, and the second flange.

[12] A film with a chain as described in [11], wherein the cut includes a plurality of portions that sandwich a non-forming portion in the middle, such that the non-forming portion is broken and the plurality of portions are continuous with each other, thereby forming the tab.

[13] A container having a chain strap is formed from a thin film having a chain strap as described in any of [10] to [12], and the container body is formed by folding the thin film back at both ends of the chain strap along its length.

[14] A method for manufacturing a container with a chain strap, comprising manufacturing a container with a chain strap by forming a container with a chain strap using a film with a chain strap as described in any of [10] to [12], and comprising the following steps: conveying and winding the film with the chain strap along the width direction of the chain strap onto a core, and joining the two ends of the film wound on the core to form a container body.

Based on the above configuration, the second flange portion is formed with a sufficient length to stably bond the chain strap to the film on both sides of the fastening portion. In contrast, by making the fourth flange portion, which is not bonded to the film, shorter than the second flange portion, or by not forming it, curling is prevented. Furthermore, by increasing the thickness of the second flange portion in the first region of the second flange portion, the overall thickness reduction of the chain strap is suppressed, and the chain strap can be stably bonded to the film.

The preferred embodiments of the invention will be described in detail below with reference to the accompanying drawings. Furthermore, in this specification and drawings, constituent elements that substantially have the same functional configuration are omitted from repeated description by using the same symbol.

Figure 1 is a top view of a container with a chain strap according to a first embodiment of the present invention. In the container 100 with the chain strap, the chain strap 120 is attached to the container body formed of a thin film 110.

Film 110 may be composed of, for example, a single-layer or multi-layer thermoplastic resin film. Specifically, the thermoplastic resin may be low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), or polypropylene (PP). PP may be homopolymer polypropylene (HPP), random polypropylene (RPP), or block polypropylene (BPP). When film 110 is composed of a multi-layer film, biaxially oriented polypropylene (OPP), biaxially oriented polyethylene terephthalate (OPET), or biaxially oriented nylon (ONy) may be used on the surface substrate. Furthermore, the film constituting the film 110 may also include a layer of metallic material such as aluminum, or a layer of inorganic material. Alternatively, a resin film containing any amount of bioplastic such as bio-polyethylene may be used. The film 110 is folded back along both ends of the chain conveyor belt 120 in the length direction, and the two ends are joined by the back sealing portion 112, thereby forming a top sealing portion 113 and a bottom sealing portion 114, thereby forming a bag-shaped container body containing a first surface 111A and a second surface 111B facing each other.

The reel tape 120 is an elongated component with a cross-sectional shape as described later, bonded to the first surface 111A of the film 110. The reel tape 120 includes first and second components having a pair of fastening portions 121 and flange portions as described later, and a tear strip 123. Examples of resins forming the various parts of the reel tape 120 include low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), or polypropylene (PP). Examples of PP include homopolymer polypropylene (HPP), random polypropylene (RPP), or block polypropylene (BPP). These can be environmentally friendly bioplastics, or mixtures of fossil fuel-derived resins and biomass plastics such as biopolymer polyethylene can be used. Furthermore, examples of resins used to form the various parts of the chain band 120, taking into account environmental considerations, include polylactic acid (PLA), polybutylene succinate (PBS), polybutylene adipate terephthalate (PBAT), polycaprolactone (PCL), polycaprolactone butylene succinate (PCLBS), polybutylene succinate adipate (PBSA), polybutylene succinate carbonate (PEC), and polyethylene terephthalate (PETS). Biodegradable resins such as poly(tetramethylene adipate terephthalate) (PTMAT), polyethylene succinate (PES), polyvinyl alcohol (PVA-H), polyglycolic acid (PGA), and poly(hydroxybutyrate hydroxyhexanoate) (PHBH) may be derived from biomass. The material of each part of the chain belt 120 contains one or more of the resins exemplified above, and may further add known additives, such as stabilizers, antioxidants, lubricants, antistatic agents, or colorants, as needed.

In the container 100 having a chain strap, a tab is formed by a slit 131 through a tear strip 123 in a portion of the length direction of the chain strap 120, specifically near one end of the chain strap 120 in the length direction. Furthermore, a protective film 141 is disposed on the side of the film 110 opposite to the first surface 111A, covering at least a portion of the length direction of the chain strap 120 containing the tab. By disposing of the protective film 141, a decrease in the container's airtightness caused by the formation of the slit 131 is prevented. In the illustrated example, a slit 132 is also formed near the other end of the chain belt 120 along its length to form the tear endpoint of the first surface 111A using the tear strip 123, and a protective film 142 is also provided to cover the area including the slit 132. The protective films 141 and 142 are, for example, formed of the same material as the film 110. Alternatively, the slit 132 can be replaced by, for example, a thin-walled portion, in which case the protective film 142 may not be provided. Furthermore, if the sealing of the container can be ensured by other mechanisms for the portion where the tab is formed, a protective film may not be provided.

Figure 2 is a cross-sectional view along line II-II of Figure 1, showing the cross-sectional shape of the chain strap. Figure 3 is a partially enlarged view of Figure 2. As shown in the figures, the chain strap 120 shown in Figure 1 includes a first component 120A and a second component 120B. In its cross-sectional shape, the first component 120A includes a first fastening portion 121A, a first flange portion 122A extending from the first fastening portion 121A to a first side in the width direction of the chain strap 120, and a second flange portion 122B extending from the first fastening portion 121A to a second side in the width direction. Specifically, the first side of the chain tape 120 in the width direction is the side of the opening formed in the container body by tearing the strip 123 when the container 100 with the chain tape is constructed, and the second side is the opposite side of the opening. Therefore, for simplicity, the first side and the second side will be referred to as the open side and the non-open side respectively in the following description. However, the first side and the second side can also be distinguished before the chain tape 120 is installed on the film 110. The above description does not limit the invention to the state where the chain tape 120 constitutes the container 100 with the chain tape and forms an opening in the container body.

The second component 120B, in its cross-sectional shape, includes a second engaging portion 121B, a third flange portion 122C extending from the second engaging portion 121B toward the open side, and a fourth flange portion 122D extending from the second engaging portion 121B toward the non-open side. Alternatively, as shown in FIG3, the second component 120B may not include the flange portion extending from the second engaging portion 121B toward the non-open side. The second engaging portion 121B can engage with the first engaging portion 121A, forming a pair of engaging portions 121 as shown in FIG1. Furthermore, although the figures show the first engaging portion 121A as male and the second engaging portion 121B as female, the male and female can also be reversed. Furthermore, in addition to male and female types, various fastening parts such as hook type or nodule type can be used, and there may be multiple pairs of fastening parts, not limited to one pair. Regarding the relationship of the flange portions of the first component 120A extending in the same direction in the cross-sectional shape, the third flange portion 122C is formed to be longer than the first flange portion 122A, and the fourth flange portion 122D is formed to be shorter than the second flange portion 122B, or it may not be formed at all. As shown in the figure, when the chain tape 120 is installed onto the film 110, the first component 120A is joined to the first surface 111A of the film 110 by at least a portion of the first flange portion 122A and the second flange portion 122B, and the second component 120B is joined to the same first surface 111A by at least a portion of the area of the third flange portion 122C that is not opposite to the first flange portion 122A.

A tear strip 123 is disposed between the first fastening portion 121A and the open-side end of the third flange portion 122C. More specifically, in this embodiment, the tear strip 123 is disposed between the open-side end of the first flange portion 122A extending from the first fastening portion 121A and the thick-walled portion 127 formed at the open-side end of the third flange portion 122C opposite to it, that is, a portion of the third flange portion 122C that is not opposite to the first flange portion 122A. The tear strip 123 can be joined to the first surface 111A of the film 110 together with other parts of the chain strap 120. The first surface 111A is torn open by the tab formed by the slit 131, which holds and pulls the tear strip 123. In the illustrated example, since the slit 131 is also formed on the side of the second component 120B, a portion of the second component 120B is also pulled along when the strip 123 is initially torn by the tab. However, for example, if the protective film 141, which does not have the slit 131, is attached to the sealing portion of the second component 120B, the first surface 111A is torn open while the tear strip 123 is peeled off from the second component 120B, specifically from the third flange portion 122C.

To facilitate peeling, the resin forming the second component 120B and the resin forming the tear strip 123 can be a combination of resins with low compatibility. Non-limiting examples of combinations of resins with lower compatibility include low-density polyethylene (LDPE)/random polypropylene (RPP), linear low-density polyethylene (LLDPE)/RPP (partially, also including m-LL), LDPE/homogeneous polypropylene (HPP), LLDPE/HPP (partially, also including m-LL), LDPE/polystyrene (PS), LLDPE/PS (also including m-LL), RPP/PS, HPP/PS, LDPE/polyethylene terephthalate (PET), LLDPE/PET, RPP/PET, HPP/PET, PS/PET, LDPE/nylon (Ny), LLDPE/Ny, RPP/Ny, HPP/Ny, or PS/Ny. In the case where the first component 120A and the second component 120B are formed from biodegradable resin, it is preferable that the torn strip 123 is also formed from biodegradable resin.

In this embodiment, the second flange portion 122B is formed with a sufficient length to stably attach the clip tape 120 to both sides of the fastening portion 121 of the film 110. In contrast, by making the fourth flange portion 122D, which is not attached to the film 110, shorter than the second flange portion 122B, or by not forming it, the fourth flange portion 122D can be prevented from curling when the film 110 with the clip tape 120 attached is wound around the core during the container manufacturing process, as described later. When forming the fourth flange portion 122D, the length of the fourth flange portion 122D in the cross-sectional shape, i.e., the dimension w in the width direction of the clamping tape 120 shown in FIG. 4, is preferably 4 mm or less, more preferably 3 mm or less, and even more preferably 2 mm or less, separated from the end of the irregular portion of the second fastening portion 121B. On the other hand, the dimension w of the fourth flange portion 122D is preferably 0 mm or more, more preferably 0.5 mm or more, and even more preferably 1 mm or more. In this way, when manufacturing a film with a clamping tape, the clamping tape 120 can be stably transported using a guide, and a stable connection can be achieved without causing defects such as tilting of the clamping tape.

Furthermore, in this embodiment, the thickness of at least a portion of the second flange portion 122B is greater than the maximum thickness of the first flange portion 122A extending toward the opposite side of the fastening portion. More specifically, as shown in FIG4, the thickness t1 of the thick-walled portion 124 formed on the second flange portion 122B is greater than the thickness t3 of the thick-walled portion 126 formed on the first flange portion 122A or the thickness t4 of the tab 125C. When the fourth flange portion 122D is formed, the thick-walled portion 124 is formed in the area of the second flange portion 122B that is not opposite to the fourth flange portion 122D. Alternatively, the thickness t2 of the tab 125A formed on the second flange portion 122B is greater than the thickness t4 of the tab 125C formed on the first flange portion 122A or the thickness t3 of the thick-walled portion 126. When the fourth flange portion 122D is formed, the tab 125A is also formed in the area of the second flange portion 122B that is not opposite to the fourth flange portion 122D. By forming such a thick-walled portion 124 or tab 125A, the reduction in the overall thickness of the chain strap 120 caused by the relatively short fourth flange portion 122D or its absence is suppressed.

By suppressing the reduction of the overall thickness of the chain tape 120 in the area where the fourth flange portion 122D is not formed, the difference in the overall thickness of the chain tape 120 on both sides of the fastening portion 121 becomes smaller. For example, when the chain tape 120 is bonded to the film 110, it can be bonded to the film 110 by the sealing rod material pressing the first flange portion 122A and the second flange portion 122B stably.

As an example, preferably, the difference between the maximum thickness t1 or t2 of the second flange portion 122B and the maximum combined thickness of the first flange portion 122A and the third flange portion 122C is 100 μm or less. More specifically, preferably, the difference between the thickness t1 at the portion of the second flange portion 122B where the thick-walled portion 124 is formed, or the thickness t2 at the portion where the tab 125A is formed, and the combined thickness t3+t5 or t4+t5 of the first flange portion 122A and the third flange portion 122C is 100 μm or less. More preferably, this difference is 50 μm or less, more preferably 30 μm or less, and more preferably 10 μm or less. Since a smaller difference is better, the lower limit is not specifically limited. When the thickness of at least a portion of the second flange portion 122B in the width direction is equal to the maximum combined thickness of the first flange portion 122A and the third flange portion 122C, the above difference becomes 0 μm. In addition, Figure 4 shows an example of forming a fourth flange portion 122D, but the same applies to examples where a fourth flange portion is not formed.

In addition, in order to reduce the overall thickness difference of the chain tape 120, or to induce the film 110 to be torn by the tear strip 123, in addition to the thick-walled portion 124 or the tabs 125A and 125B, tabs 125C and thick-walled portions 126 may also be formed on the first flange portion 122A, or thick-walled portions 127 may be formed on the third flange portion 122C.

Furthermore, in the case where a protective film 141 is present as illustrated, by suppressing the reduction in the overall thickness of the chain strap 120 in the area where the fourth flange portion 122D is not formed, the protective film 141 can be stably bonded to the film 110 and the chain strap 120. More specifically, the peripheral portion of the protective film 141 is bonded to the film 110 on both sides of the chain strap 120, the third flange portion 122C of the second component 120B, and the second flange portion 122B of the first component 120A. For example, if a thick-walled portion 124 is formed in the second flange portion 122B, the protective film 141 can be stably bonded to the thick-walled portion. By stably bonding the protective film 141 to the second flange portion 122B at the periphery, the reduction in the airtightness of the container caused by the formation of the cut 131 can be more effectively prevented.

As explained above, in the first embodiment of the present invention, by making the fourth flange portion 122D where the clevis tape 120 is not attached to the film 110 shorter than the second flange portion 122B, or by not forming it at all, the fourth flange portion 122D can be prevented from curling during the container manufacturing process when the film 110 with the clevis tape 120 attached is wound around the core. Furthermore, by making the thickness of at least a portion of the second flange portion 122B greater than the thickness of the first flange portion 122A, for example, the stability of the attachment when the clevis tape 120 is attached to the film 110, or when the protective film 141 is attached to the film 110 and the clevis tape 120, can be improved.

Figure 5 is a cross-sectional view of a container with a chain strap according to a second embodiment of the present invention. In this embodiment, the arrangement of the tear strip 123 differs from that of the first embodiment described above, but since the other components are the same, repeated detailed descriptions are omitted. In this embodiment, the tear strip 123 is disposed at the end of the first flange portion 122A on the opening side. As shown in the example, a thin-walled portion 122E can be formed at the end of the first flange portion 122A on the opening side, and the tear strip 123 can be laminated laterally on the thin-walled portion 122E facing the second component 120B. In this case, the tear strip 123, which is pulled from the protrusion, is peeled off from the third flange portion 122C, and a portion of the first flange portion 122A, such as the thin-walled portion 122E, is torn off together with the first surface 111A to form an opening in the container.

Figure 6 is a cross-sectional view of a container with a chain strap according to a third embodiment of the present invention. In this embodiment, the arrangement of the tear strip 223 differs from that of the first embodiment described above, but since the other components are the same, repeated detailed descriptions are omitted. In this embodiment, the end of the first flange portion 122A on the open side constitutes the tear strip 223. Therefore, the first component 120A including the first flange portion 122A and the tear strip 223 are, for example, formed of the same material. Furthermore, a release layer 224 is provided between the tear strip 223 and the third flange portion 122C. By providing the release layer 224, even if the first component 120A and the second component 120B of the chain strap 120 are formed from the same material, and the tear strip 223 is formed from the same material, the tear strip 223 can be easily peeled off from the third flange portion 122C when it is pulled. The first component 120A, the second component 120B, the tear strip 223, and the release layer 224 can be formed, for example, from a combination of resins with low compatibility.

Figure 7 is a cross-sectional view showing variations applicable to the above embodiments. In the above embodiments, examples of forming thick-walled portions 124, 126, 127 or tabs 125A, 125B, 125C in the chain strap 120 have been described, but such configurations are not necessary. For example, as shown in the figure, tabs or thick-walled portions may not be formed in each flange portion, and the second flange portion 122B may be formed entirely thicker in the first region R1 where it does not face the fourth flange portion 122D. The thicker portion 128 is exemplified as a stepped portion, but it may also be, for example, a portion of the second flange portion 122B that is not stepped and gradually thickens towards the non-opening side. Furthermore, tabs or thick-walled portions may not be uniformly formed on all flange portions; for example, one or both of tabs or thick-walled portions may be formed only on a portion of the flange portions. Also, in cases where the airtightness of the container can be ensured by other mechanisms for the portions where tabs are formed, a protective film may not be provided as shown in the diagram.

Figure 8 is a diagram showing a film with a chain strap according to an embodiment of the present invention. The chain strap 120 described above can be joined to a film 110, for example, a roller-shaped film formed before the container body, as a film 300 with a chain strap. In this case, the width direction of the film 110 is aligned with the length direction of the chain strap 120. As described above in the configuration of a container with a chain strap, at least a portion of each of the first flange portion 122A and the second flange portion 122B of the chain strap 120, and at least a portion of the area of the third flange portion 122C that is not opposite to the first flange portion, are joined to the film 110. Furthermore, when protective films 141 and 142 are configured, the protective films 141 and 142 are configured to cover at least a portion of the longitudinal direction of the chain belt 120 in such a way that they cover the cuts 131 and 132 of the tab from the opposite side of the film 110. As will be explained below, since the film 110 is formed into the container body at both ends of the chain belt 120 in the longitudinal direction, the width L1 of the film 110 is more than twice the length L2 of the chain belt.

Figure 9 is a diagram showing variations of the tabs applicable to various embodiments. In the illustrated example, the slit 131 forming the tab includes a plurality of portions 131A, 131B, 131C, and 131D that sandwich the non-forming portion 133 in the middle. By breaking the non-forming portion 133, the plurality of portions 131A, 131B, 131C, and 131D are made continuous with each other, thereby forming a tab. In this way, for example, when a film with a chain strap as shown in Figure 8 is wound, the tab formed by the slit 131 can be prevented from sticking up. For this purpose, it is effective to observe, when viewed along the width direction of the chain, the non-forming portion 133 between portions 131A and 131B corresponding to one end of the tab, and the non-forming portion 133 between portions 131C and 131D corresponding to the other end of the tab. In this case, even the non-forming portion 133 between non-forming portions 131B and 131C is acceptable. Not limited to these examples, the cut 131 forming the tab can be divided into more or fewer portions than in the illustrated example. Furthermore, the shape of the tab is not limited to the illustrated example and can be any other arbitrary shape.

Figure 10 is a diagram illustrating the manufacturing steps of a container with a chain strap according to an embodiment of the present invention. In the example shown, the manufacturing apparatus 500 includes a feeding mechanism 501 for supplying the aforementioned film 300 with a chain strap, a core 502, a conveyor belt 503, and a back sealing forming part 504. The film 300 with the chain strap is wound around the core 502 while being conveyed from top to bottom by the conveyor belt 503. Because the core 502 has a generally circular cross-section at the top, the film 300 with the chain strap can be smoothly wound into a cylindrical shape. The film 110, wound into a cylindrical shape, is folded back on both sides in the width direction, i.e., on both ends in the length direction of the chain strap 120, thereby forming the first surface 111A and the second surface 111B of the container body. The area where the chain strap 120 is joined becomes the first surface 111A. The back sealing forming portion 504 joins the two ends of the wound film 110 in the width direction by a method such as heat sealing, thereby forming the back sealing portion 112. The area where the back sealing portion 112 is formed becomes the second surface 111B.

In the embodiment of the present invention, when the film 300 with the interlocking tape is wound around the core 502 in the above manufacturing steps, it can prevent the flange portion of the interlocking tape 120 that is not attached to the film 110, specifically the fourth flange portion 122D, from curling up, or prevent the fastening portion 121 from opening as the flange portion curls up.

The manufacturing apparatus 500 further includes sealing rods 505 and 506, a cutter 507, and a support 508. The sealing rods 505 and 506 include opposing portions on their upper and lower sides, separated by the cutter 507, through which a top seal 113 and a bottom seal 114 are formed on the film 110 by means of, for example, heat sealing. The cutter 507 approaches and separates from the support 508, cutting the film 110 in the width direction near the top seal 113 and the bottom seal 114.

Here, the aforementioned core 502 is hollow, and the filling device 509 is inserted into its inner side from above. The filling device 509 and the sealing rods 505 and 506 clamp the film 110 and simultaneously eject the contents. In this way, the contents can be filled into the storage space formed above the bottom sealing portion 114. When the sealing rods 505 and 506 separate, the contents, together with the film 110, are conveyed downwards over the sealing rods 505 and 506. Then, the sealing rods 505 and 506 clamp the film 110 to form the top sealing portion 113, thereby sealing the storage space.

The container 100 with a chain strap can be manufactured using the manufacturing steps described above. Furthermore, the above steps are just one example and can be modified in various ways. For example, a manufacturing process can be implemented that includes supplying a film 110 without the chain strap 120, joining the chain strap 120, forming slits 131 and 132, and joining protective films 141 and 142, as well as a manufacturing process for a container with a chain strap as described above, as a series of steps.

100: Container with a chain strap 110: Film 111A: First side 111B: Second side 112: Back seal 113: Top seal 114: Bottom seal 120: Chain strap 120A: First component 120B: Second component 121: Fastening part 121A: First fastening part 121B: Second fastening part 122A: First flange 122B: Second flange 122C: Third flange 122D: Fourth flange 122E: Thin-walled part 123: Tear strip 124: Thick-walled part 125A: Protrusion 125B: Protrusion 125C: Protrusion 126: Thick-walled part 27: Thick-walled section 128: Part 131: Cut 131A: Part 131B: Part 131C: Part 131D: Part 132: Cut 133: Non-forming part 141: Protective film 142: Protective film 223: Tear strip 224: Peeling layer 300: Film with interlocking belt 500: Manufacturing device 501: Feeding mechanism 502: Core 503: Conveyor belt 504: Back seal forming part 505: Sealing rod 506: Sealing rod 507: Cutter 508: Support 509: Filling device L1: Width L2: Length t1~t5: Thickness w: Dimension

Figure 1 is a top view of a container with a chain strap according to a first embodiment of the present invention. Figure 2 is a cross-sectional view along line II-II of Figure 1. Figure 3 is a diagram showing a variation of Figure 2. Figure 4 is a diagram showing the dimensional relationships in the example of Figure 2. Figure 5 is a cross-sectional view of a container with a chain strap according to a second embodiment of the present invention. Figure 6 is a cross-sectional view of a container with a chain strap according to a third embodiment of the present invention. Figure 7 is a cross-sectional view showing variations applicable to each embodiment. Figure 8 is a diagram showing a film with a chain strap according to an embodiment of the present invention. Figure 9 is a diagram showing variations of tabs applicable to each embodiment. Figure 10 is a diagram showing the manufacturing steps of a container with a chain strap according to an embodiment of the present invention.

100: Containers with chain straps

111A: Page 1

111B: Page 2

113: Top Sealing Section

120A: Component 1

120B: Second component

121A: First fastening part

121B: Second fastening part

122A: First flange portion

122B: Second flange portion

122C: Third flange

122D: Fourth flange

123: Tear the strips open

124: Thick-walled section

125A: [Unclear - possibly a tympanic membrane]

125B: [Unclear - possibly a tympanic membrane]

125C: [Unclear - possibly referring to a specific type of lamina]

126: Thick-walled section

127: Thick-walled section

131: Incision

141: Protective Film

Claims (14)

A chain strap comprising a first component and a second component; wherein the first component, in cross-sectional shape, includes a first fastening portion, a first flange extending from the first fastening portion to a first side in the width direction of the chain strap, and a second flange extending from the first fastening portion to a second side in the width direction; the second component, in cross-sectional shape, includes a first flange that can fasten with the first fastening portion. The 2-fastening portion and the 3rd flange portion extending from the 2nd fastening portion to the 1st side may include a 4th flange portion extending from the 2nd fastening portion to the 2nd side and being shorter than the 2nd flange portion, or may not include a flange portion extending from the 2nd fastening portion to the 2nd side; and the thickness of at least a portion of the 2nd flange portion in the width direction is greater than the maximum thickness of the 1st flange portion. For example, in the chain belt of claim 1, a thick-walled portion is formed at the second flange, and the thickness of the second flange at the thick-walled portion is greater than the thickness of the thick-walled portion or tab formed at the first flange; when the second component includes the fourth flange, the thick-walled portion is formed in the area of the second flange that is not opposite to the fourth flange. For example, in the chain belt of claim 1 or 2, a tab is formed on the second flange portion, and the thickness of the second flange portion at the tab is greater than the thickness of the tab or thick-walled portion formed on the first flange portion; when the second component includes the fourth flange portion, the tab is formed in the area of the second flange portion that is not opposite to the fourth flange portion. For any of claims 1 to 3, the difference between the thickness of at least a portion of the second flange portion in the width direction and the maximum combined thickness of the first flange portion and the third flange portion is less than 100 μm. For any of the claims 1 to 4, the chain strap, wherein the second component includes the fourth flange portion, the length of which is 4 mm or less. The chain strap of any of claims 1 to 5, wherein the third flange portion is formed in cross-sectional shape to be longer than the first flange portion; and further having a tear strip disposed between the first fastening portion and the end of the third flange portion on the first side. As in claim 6, the chain strap has the tear strip provided in a portion of the area of the third flange that is not opposite to the first flange. As in claim 6, the chain strap has the tear strip provided at the end of the first flange on the first side. As in claim 6, the first end of the first flange portion on the first side constitutes the tear strip, and a peeling layer is provided between the tear strip and the third flange portion. A film having a reel tape, wherein a reel tape as described in any of claims 6 to 9 is joined to the film; and at least a portion of each of the first flange and the second flange, and at least a portion of the area of the third flange that is not opposite to the first flange, is joined to the film. The film with a chain strap, as claimed in claim 10, wherein a tab is formed by a cut that traverses the tear strip in a portion of the length direction of the chain strap; a protective film is disposed from the opposite side of the film covering at least a portion of the length direction of the chain strap containing the tab; and the protective film is bonded to at least a portion of the film, the third flange, and the second flange. The film with a chain strap, as in claim 11, wherein the cut includes a plurality of portions that clamp non-forming portions in the middle; causing the non-forming portions to break and the plurality of portions to be continuous with each other, thereby forming the tab. A container having a chain strap is formed from a film having a chain strap as described in any of claims 10 to 12; and the container body is formed by folding the film back at both ends of the chain strap along its length. A method for manufacturing a container with a chain strap, comprising the steps of: conveying and winding the film with the chain strap along the width direction of the chain strap onto a core, and joining the two ends of the film wound on the core to form the container body.