JP2010030652A - Reclosable clip - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reclosable clip which can tightly close a once-opened packing bag again, and has excellent storage performance particularly in use by optionally adjusting the reclosable clip to the width of the bag. <P>SOLUTION: The reclosable clip 1 which pinches the opening 7a of the bag 7 from the outside so as to close it again, includes fitting members 3, 5 capable of being engaged with each other with the bag 7 pinched between them. The fitting members 3, 5 are constituted in a single swinging manner wherein their ends 1a in a longitudinal direction are connected to each other while the other ends are opened. A matrix component of the fitting members 3, 5 is formed of plastic whose glass transition temperature is less than 0°C. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a reclose clip that reseals an opening of a bag by sandwiching the opening of the bag from the outside.

  Conventionally, packaging bags made of plastic films are often used to store liquid or solid materials such as food, household goods, toiletries, pharmaceuticals, miscellaneous goods, and the like. However, many of these packaging bags have a structure in which the opening is sealed by heat sealing, and once opened, there are many that are difficult to reseal. For this reason, as a method of resealing, a method of simply binding with a rubber band or a string, a method of folding the opening and temporarily fixing with a rubber band or a tape with an adhesive, a method of heat sealing again, and the like are used. ing. However, in the case of binding a packaging bag including a tray for supporting the contents, there is a problem that not only the workability is bad, but also the resealed bag becomes three-dimensional, so that the storage property is poor. In addition, the method for resealing food packaging bags in which the opening is folded back also has a sanitary problem due to insufficient sealing performance. Furthermore, the method of heat sealing again has a problem that a dedicated device is required.

  Therefore, in order to solve the above problems, a sealing tool for resealing the bag opening has been proposed. As its main thing, the clip which has the structure inserted | pinched by the member of a recessed part and a convex part from the outer side of a bag, and consists of a highly rigid raw material is known (for example, refer the following patent documents 1-4). Further, a band clip is known in which members of a concave portion and a convex portion are formed of a flexible material, and both ends are respectively crimped (see, for example, Patent Document 5 below).

Furthermore, a bag with a steam venting mechanism is also known as a heating bag dedicated to a microwave oven. The feature of this type of bag is that the steam generated by the range heating is released from the steam port previously provided to the bag, thereby suppressing the burst of the bag due to the increase in internal pressure and heating. As a mechanism of this steam port, there is a method that selectively opens as the internal pressure increases, such as a method using easy-opening properties, for example, a method of printing a release agent on the seal portion, or a method of devising the shape of the seal. (For example, refer to Patent Documents 6 and 7 below). In addition, as another mechanism, there is a mechanism in which a steam port is opened in advance (see, for example, Patent Document 8 below). Bags equipped with these mechanisms are used as retort pouches or frozen food packagings that wrap foods that have been cooked or semi-cooked, or bags that the user puts in and prepares the food.
JP-A-8-48345 Japanese Patent Laid-Open No. 9-4611 JP 2003-72778 A JP 2005-185817 A JP-A-11-130103 Japanese Patent No. 3908632 Japanese Patent No. 3035484 Japanese Patent Publication No. 8-11585

  However, this type of clip improves the sealing performance of the packaging body by sandwiching it between the convex portions of the recess over the entire width direction of the packaging body. It was necessary to use a long clip. However, the clips proposed in Patent Documents 1 to 4 cannot adjust the length of the clip to the width of an arbitrary bag because of its structure and rigidity. There was a problem when housed inside. For example, when resealing a package of frozen food that has been opened once and storing it in a freezer, not only a reduction in storage properties due to the high rigidity of the clip, but also by using a clip larger than the width of the bag, There was also a problem of a decrease in storage. In addition, since the stick-like clip with high rigidity has a bulky shape, there is a problem in the storage property when the clip is not used. Further, when the two members to be fitted are not connected, there is a problem that only one member is lost during storage and the function as a clip cannot be performed. Moreover, although the band clip made of a flexible material in Patent Document 5 has improved storage properties, it has been difficult to adjust to an arbitrary length because it has a structure in which both ends are crimped. For this reason, not only the re-sealed package is inferior in storage capacity, but also the bag is wrinkled when the bag is passed through an open clip with an annular tape shape due to the double-sided stopper structure, which causes problems in workability and sealing performance. Sometimes it happened.

  Moreover, since the above-mentioned bag with a steam venting mechanism (patent documents 6 to 8) is in a state where the steam vent is opened after microwave heating, the bag cannot be sealed when the bag is stored after cooking. There was a problem. In addition, in the case of a mechanism in which the steam vent is opened in advance, there was a problem in sealing performance even in the pre-cooking preservation process such as seasoning. Therefore, a bag with a steam release mechanism cannot serve as a storage bag, and it is necessary to prepare a dedicated bag for each. As a countermeasure, if a bag with a steam release mechanism is to be sealed with a clip, the bag will burst if the user accidentally heats it in the sealed state, that is, in a sealed state. There is a possibility.

  In view of the above problems, the present invention is a reclose clip that can re-seal a packaging bag that has been opened once, with good sealing properties, and has high storability especially during use by arbitrarily adjusting to the width of the bag. The purpose is to provide. Moreover, it aims at provision of the reclose clip used suitably for a food packaging bag, especially a packaging bag with a steam release mechanism.

  As a result of intensive studies in order to achieve the above object, the following invention has been achieved. That is, the reclose clip of the present invention is a reclose clip that reseals the opening of the bag by sandwiching the opening of the bag from the outside and can be fitted to each other with the bag sandwiched therebetween. First and second fitting members are provided, and the first and second fitting members have a one-sided structure in which one ends in the longitudinal direction are connected to each other and the other ends are opened. The fitting member is characterized in that the matrix component is made of a plastic having a glass transition temperature of less than 0 ° C.

In this reclose clip, the first and second fitting members have a single-open structure,
The starting point of the fitting state of the first and second fitting members can be made at the outer point of the packaging bag 7 that is the fitting object. Therefore, the workability of the fitting of the first and second fitting members can be improved, the bag can be reliably resealed, and sufficient sealing performance can be secured. Also, since the first and second fitting members can be sequentially fitted from one end to the other, starting from the connecting portion of the first and second fitting members, this occurs at the time of resealing. Wrinkles of easy bags can be suppressed, and the bag can be made more excellent in sealing performance. Furthermore, since the length of the reclose clip can be adjusted in accordance with the width of the bag by the single opening structure, it is possible to achieve excellent storage properties. Moreover, when the first and second fitting members are made of plastic having a matrix component of a glass transition temperature of less than 0 ° C., the clip as a whole exhibits sufficient flexibility when the reclose clip is handled at room temperature. be able to. Therefore, the reclose clip sandwiched between the bags can be deformed together with the shape of the bag, so that it becomes a clip with high storability and good usability. In addition, since the reclose clip has flexibility, it is easy to cut the first and second fitting members in accordance with the width of the bag to be resealed, and the reclose clip is stored in a specific volume storage. It is easy to adjust to an easy length.

  Each of the first and second fitting members includes a base material portion and a fitting portion that is provided on the base material portion and engages with the counterpart, and the base material portion includes the first and second fitting members. It is good also as an opening part or a notch for making it easy to cut | disconnect the 2nd fitting member in the width direction. In this case, since the first and second fitting members are easily cut, the lengths of the first and second fitting members can be adjusted more easily.

  Further, the first and second fitting members may have fitting portions having the same shape. In this case, a clip with a single-open structure can be created by folding back one fitting member. Therefore, the user can determine the starting point of the pinching, and the pinching start operation becomes easy. Even when the clip is not used, it is possible to store a single fitting member in a wound state, so that the storage property is high.

  Moreover, the bag which is the object of resealing the reclose clip of the present invention may be a food packaging body. Moreover, the bag which is the object of resealing the reclose clip of the present invention may be provided with a steam venting mechanism for microwave heating.

  According to the present invention, a packaging bag that has been opened once can be resealed with good sealing properties, and a reclose clip that has high storability during use can be provided. Moreover, the reclose clip used suitably for a food packaging bag, especially a packaging bag with a steam release mechanism can be provided.

  Hereinafter, preferred embodiments of a reclose clip according to the present invention will be described in detail with reference to the drawings.

  As shown in FIG. 1, the reclose clip 1 has an opening 7 a of a packaging bag 7 once opened, and a fitting member (first fitting member) 3 and a fitting member (second fitting) having a long shape. The packaging bag 7 is resealed by being sandwiched between the joint member 5. For example, the reclose clip 1 is suitably used for applications such as resealing a package of frozen food that has been opened. The reclose clip 1 has a single-open structure in which one end of the pair of fitting members 3 and 5 is connected to each other by a connecting portion 1a and the other end is opened. Moreover, the fitting members 3 and 5 have a fitting type zipper tape structure that can be fitted to each other with the packaging bag 7 sandwiched therebetween. The detailed structure of the fitting members 3 and 5 will be described later. In some cases, a strip-shaped base film 35 is joined to the outside of the fitting member 3, and a strip-like base film 55 is joined to the outside of the fitting member 5. That is, although the form in which the base films 35 and 55 are joined to the outside of the joining members 3 and 5 is illustrated and described here in FIG. 1, the base films 35 and 55 may be omitted.

  The fitting members 3 and 5 of the reclose clip 1 are made of a resin whose matrix component is less than 0 ° C. in glass transition temperature. Here, in the case of a single component resin, the matrix component is the resin, and when a plurality of types of resins are mixed, the matrix component refers to a component that forms a sea of an island structure formed by mixing. When the matrix component has a glass transition temperature of less than 0 ° C., the clip as a whole can exhibit sufficient flexibility when the reclose clip 1 is handled at room temperature. Therefore, since the reclose clip 1 sandwiched between the packaging bags 7 can be deformed together with the shape of the packaging bag 7, it becomes a clip with high storability and good usability. In addition, since the reclose clip 1 has flexibility, the fitting members 3 and 5 can be cut to an arbitrary length using a scissors or the like according to the width of the bag to be resealed. It is possible to make the length easy to be accommodated in a specific volume storage.

  If a resin having a glass transition temperature of 0 ° C. or higher is used as the matrix component, the clip becomes harder during storage, particularly when stored in a freezer. There is also a risk of damage. Therefore, in consideration of resealability of frozen food bags, the glass transition temperature is − 80 degreeC or more and less than 0 degreeC are preferable, More preferably, it is -60 degreeC or more and -10 degrees C or less, More preferably, it is -40 degreeC or more and -20 degrees C or less. A resin having a glass transition temperature of less than −80 ° C. is generally not preferable from the viewpoint of heat resistance because the melting point is generally low.

  As a resin that achieves the characteristics of the matrix component, a polyolefin resin such as polyethylene and polypropylene, a thermoplastic polyurethane, a polyolefin elastomer, a polyamide elastomer, a polyester elastomer, and a polystyrene elastomer can be used alone or in combination. Can be used. In addition, a polyamide resin, a polyester resin, and an ethylene vinyl alcohol resin can be added as long as the glass transition point of the matrix component is not affected. Among these, polyolefin resins such as LLDPE (linear low density polyethylene), LDPE (low density polyethylene), PP (polypropylene) and the like are preferable. These resins may contain ethylene and propylene monomers as main components and other olefins as copolymer components. Other thermoplastic resins may be mixed with the polyolefin resin. For example, ethylene-vinyl alcohol copolymer can be mixed with LDPE, and polyolefin thermoplastic elastomer can be mixed with PP at a specific ratio. It is.

  The fitting members 3 and 5 of the reclose clip 1 have a single-open structure as described above. According to the single-open structure, since the starting point of the fitted state of the fitting members 3 and 5 can be made at the outer point of the packaging bag 7 which is the fitting object, the fitting members 3 and 5 are fitted. Workability can be improved. As a result, the packaging bag 7 can be reliably resealed, and sufficient sealing performance can be secured. Furthermore, unlike the both-end stop structure in which both ends of the fitting members are connected, the single-open structure can adjust the length of the clip in accordance with the width of the fitting object, so that it has excellent storage properties. be able to. Further, in the reclose clip 1, since the fitting members 3 and 5 can be sequentially fitted from one end to the other end with the connecting portion 1a as a starting point, the wrinkles of the packaging bag 7 that are likely to occur at the time of resealing. And can be made more excellent in sealing performance.

  Further, as described above, the fitting members 3 and 5 of the reclose clip 1 have a fitting type zipper tape structure. The zipper tape structure indicates a known zipper tape structure including a female member having a fitting concave portion and a male member having a fitting convex portion. In the reclose clip 1, the fitting member 3 is a female member, and the fitting member 5 is a male member. That is, as shown in FIG. 2, the fitting member 3, which is a female member, includes a base material portion 34 and a fitting recess 32 formed on the base material portion 34. These can also be joined to the base film 35.

  The fitting member 3 extends in the same cross-sectional shape over the entire length in the longitudinal direction. Similarly, the fitting member 5 which is a male member has a base material portion 54 and a fitting convex portion 52 formed on the base material portion 54 as shown in a cross-sectional shape in FIG. These can be bonded to the base film 55 by a manufacturing method. The fitting member 5 extends in the same cross-sectional shape over the entire length of the fitting member 5 in the longitudinal direction.

  Originally, this type of zipper tape structure is used to seal a bag with a structure in which a female member and a male member installed facing the inside of the bag are directly fitted. In this zipper tape structure, by satisfying the shape, size, resin elastic modulus, etc. of the fitting concave portion 32 and the fitting convex portion 52 to be described later, the original function can be achieved even when the packaging bag 7 is fitted. It is preferable to employ such a zipper tape structure in the reclose clip 1 because it is possible to obtain a clip having both a certain sealing property and further a storage property and workability.

  Next, the shapes of the fitting recess 32 and the fitting protrusion 52 will be described. As the shapes of the fitting concave portion 32 and the fitting convex portion 52, generally known shapes may be used. However, since it is necessary to sandwich the packaging bag 7 which is a fitting object between the fitting recess 32 and the fitting projection 52, the fitting recess 32 and the fitting projection 52 are respectively shown in FIG. It is preferable to adopt the shape of FIG. That is, as shown in FIG. 2, the fitting recess 32 preferably has a shape in which a pair of hook portions 32 a and 32 b facing each other in the width direction are upright in parallel from the surface of the base material portion 34. The shape illustrated in FIG. 2 has a structure in which the hook portions 32a and 32b are difficult to open to both sides even when fitted with the fitting convex portion 52, so that even when the packaging bag 7 is sandwiched, the shape is tightly fitted and sealed. It can be resealed with high performance.

  Moreover, the shape of the fitting convex part 52 can use the shape of the normally well-known range like FIG. 3, for example. That is, the fitting convex part 52 has the return parts 52a and 52b projected on both sides in the width direction. As shown in FIG. 4, when the fitting members 3 and 5 are fitted together with the packaging bag 7 sandwiched therebetween, the return portions 52a and 52b are hooked on the hook portions 32a and 32b, respectively. The fitting recess 32 and the fitting protrusion 52 are fitted.

  Next, the sizes of the fitting concave portion 32 and the fitting convex portion 52 will be described. Although the size of the fitting recessed part 32 and the fitting convex part 52 is determined by the characteristic of the packaging bag 7 made into the object of sealing, as shown in FIG. It is preferable that the chuck-to-chuck thickness 11 is set to 1.0 mm or more and 10.0 mm or less. By setting it as this prescribed range, the reclose clip 1 can be easily cut using a daily cutting jig such as a scissors. When the inter-chuck thickness 11 exceeds 10.0 mm, the clip becomes hard and cutting with a scissors tends to be difficult, and the storage property tends to be poor. On the other hand, if it is less than 1.0 mm, it is difficult to sandwich and seal the packaging bag 7.

  Furthermore, the clearance 12 between the hook portions 32 a and 32 b shown in FIG. 2 is preferably in the range of 40% to 60% of the recess width 13. By designing the fitting recess 32 to the above-described prescribed clearance 12, the packaging bag 7 can be easily sandwiched with high sealing performance. If the clearance 12 is less than 40% of the recess width 13, depending on the thickness of the target packaging bag 7, it becomes difficult to be sandwiched and fitted. Since the hook portions 32a and 32b are easily opened to both sides, the fitting becomes sweet and the sealing property tends to be inferior.

  Moreover, it is preferable that the nail | claw thickness 14 of the fitting convex part 52 shown in FIG. 3 is the thickness of the range of 80% or more and 120% or less of the clearance 12 (refer FIG. 2) of the fitting recessed part 32. FIG. If it is less than 80%, workability at the time of fitting tends to be inferior, and if it is more than 120%, it may be impossible to fit in the clearance 12 of the fitting recess 32.

  Next, the material of the fitting members 3 and 5 will be described. The material of the fitting members 3 and 5 is preferably composed of a resin composition having an elastic modulus of 100 MPa to 800 MPa (JIS-K-7161, 7162). By using a composition having an elastic modulus in this range, it has a fitting strength that does not come off during normal use, and it is easy to ensure excellent sealing performance. Furthermore, since it has moderate flexibility, it becomes a clip excellent in both workability and storage. If a resin with an elastic modulus of more than 800 MPa is used, a reclose clip with high rigidity is obtained, so that the storage property tends to be inferior. It may not be expressed.

  Furthermore, when obtaining a reclose clip with a good feeling of use, it is more preferable that the material of the fitting members 3 and 5 is in a range of an elastic modulus of 200 MPa to 600 MPa. By using a resin composition having an elastic modulus in this range, it becomes easy to obtain a clip with good usability that has both the sealing performance, workability, and storage required for the clip.

  Moreover, the relationship of the elastic modulus of the fitting members 3 and 5 to be fitted is not particularly limited, and may be a combination of the same elastic modulus or a combination of different elastic moduli. In the case of a combination in which the elastic modulus of the fitting members 3 and 5 is close, by optimizing the shape of the fitting members 3 and 5, a clip having excellent sealing performance is obtained. On the other hand, in the case of a combination of fitting members 3 and 5 that are greatly different within the specified elastic modulus range, for example, when a high elastic modulus resin having excellent rigidity such as a polypropylene resin composition is used for the fitting member 3 When the film of the packaging bag is fitted, the hooks 32a and 32b of the fitting recess 32 are prevented from opening, and the fitting protrusion 52 once fitted is firmly fitted without being detached from the fitting recess 32. It becomes possible. Furthermore, by using a highly flexible polyethylene-based resin for the fitting member 5, the flexibility of the entire chuck can be improved, and the handling property and the storage property can be combined with the sealing property. On the contrary, when a low elastic modulus resin is used for the fitting member 3 and a high elastic modulus resin is used for the fitting member 5, the fitting is possible even when the packaging bag 7 as the fitting object has high rigidity. Since the mating convex portion 52 can be sufficiently pushed into the fitting concave portion 32, a reclose clip excellent in workability can be obtained.

  Moreover, in the reclose clip 1, in order to make the fitting members 3 and 5 and the base film 35 and 55 easy to cut | disconnect in the width direction, you may form an easily tearable starting point. Specifically, as shown in FIG. 5 and FIG. 6, easy tearing is expressed in the side edges of the base members 34 and 54 and the side edges of the base films 35 and 55 of the fitting members 3 and 5. An opening 23 may be formed. The opening portion 23 is formed by forming a large number of fine holes penetrating in the thickness direction at the side edge portions of the base material portions 34 and 54 and the base material films 35 and 55. Moreover, in order for the base material portions 34 and 54 and the base material films 35 and 55 to be easily tearable, the V-shaped notch 24 or the I-shaped notch 25 is provided on the side edge. It can also be formed in the part.

  Such easy tearing starting point makes it easy to cut the fitting members 3 and 5 in the width direction, and can be cut to an arbitrary length with a fingertip without using a jig such as a hook. Therefore, it becomes easy to adjust the reclose clip 1 to a length that matches the width of the opening 7a (FIG. 1) of the packaging bag 7 to be resealed. Since the size of the fine hole of the opening 23 provided for easy tearing depends on the shape and material of the fitting members 3 and 5, the optimum value cannot be defined unconditionally, but the preferred hole diameter is 0. It is 0.05 mm or more and 1.1 mm or less, More preferably, it is 0.1 mm or more and 0.7 mm or less, More preferably, it is 0.2 mm or more and 0.4 mm or less.

  In addition, the hook portions 32a and 32b of the fitting recess 32 may be provided with cut surfaces 26 at an arbitrary pitch so that the hook portions 32a and 32b are discontinuous in the longitudinal direction. Similarly, the fitting protrusion 52 may be provided with the cut surfaces 27 at an arbitrary pitch so that the fitting protrusion 52 is discontinuous in the longitudinal direction. Such cut surfaces 26 and 27 make it easier to cut the fitting members 3 and 5 at the fingertips. However, the pitch of the cut surface 26 and the cut surface 27 is preferably arranged at a staggered position in the fitted state so as not to impair the sealing performance of the reclose clip 1. That is, it is preferable to arrange the cut surface 26 and the cut surface 27 so that they do not coincide with each other in the fitted state.

  The reclose clip 1 can be suitably used for food packaging bags. In particular, among food packaging bags, it can be suitably used for bags stored in a limited volume space such as a refrigerator and a freezer, and frozen food packaging bags.

  Moreover, the reclose clip 1 can be used, for example, to seal a food packaging bag 107 having a steam release mechanism 109 for heating a microwave oven as shown in FIG. As described above, the food packaging bag 107 has a problem that the steam release mechanism 109 is opened after heating, and thus cannot be hermetically stored after cooking. Further, in the case of a bag having a mechanism in which a steam vent is opened in advance, sealing before heating is impossible. However, if the reclose clip 1 is used, the food packaging bag 107 can be sealed at an arbitrary position. Therefore, as shown in FIG. 7, the portion of the food packaging bag 107 containing the food 108 and the steam release mechanism 109 By attaching the reclose clip 1 so as to separate the gaps, the food 108 can be sealed and stored in the bag with the steam release mechanism 109 opened.

  At this time, by designing the fitting pressure of the reclose clip 1 to a certain extent, even if the food packaging bag 107 with the clip stopped is mistakenly heated by the range, the reclose clip can be easily reclosed due to an increase in the pressure inside the bag. Since the clip 1 is disengaged, safety is sufficiently ensured. The relationship between the required fitting strength and the internal pressure in this case differs depending on the size of the food packaging bag 107 and cannot be defined uniquely. However, the preferable pressure-resistant strength of the reclose clip 1 is 0.5 atm or more 1 0.05 atm or less, more preferably 0.7 atm or more and 0.95 atm or less. If it exceeds 1.05 atm, the risk of breakage of the bag due to the release clip 1 not being disengaged due to the pressure inside the bag during range heating increases, and if it is less than 0.5 atm, the airtightness during storage is poor. It will be a thing.

  Further, since the reclose clip 1 has a single-open structure, as shown in FIG. 8, when the food 118, 120 is stored in the food packaging bag 117, the portion including the food 118 and the food 120 are included. It is possible to attach the reclose clip 1 so as to separate the parts. By mounting the reclose clip 1 in this way, the contents of the bag 117 can be used for subdividing. Therefore, for example, it is possible not only to separate the ingredients, but also to store the ingredients and the seasoning liquid in a separated state and to mix them during the range heating.

  The reclose clip 1 can be manufactured by a conventionally known extrusion molding method using a mold corresponding to the shape of the target fitting concave portion 32, fitting convex portion 34, and the like. The base films 35 and 55 can be appropriately manufactured by using a conventionally known molding method such as a casting method or an inflation method, and can be used after being slit to a required width. The manufacturing process may adopt any method known in the art, a method in which the base film 35, 55 and the fitting members 3, 5 are extruded and molded simultaneously, and the base film 35, 55 manufactured in advance is melted. A method of extruding and welding the fitted members 3 and 5, a method of welding the previously produced fitting members 3 and 5 to the remaining preheated base films 35 and 55, and the produced fitting members 3 and 5, respectively. A method of bonding the base films 35 and 55 with heat bonding or an adhesive can be used. A clip with a single-open structure can be obtained by cutting the collected fitting members 3 and 5 into an arbitrary length, and fusing and sealing one end in a fitted state, or fixing one end with an adhesive. .

  In addition, the base material portions 34 and 54, the base material films 35 and 55, the fitting concave portion 32, and the fitting convex portion 34 can be opened by cutting with a hole processing such as a needle hole or a laser or a laser. The hole 23 and the notches 24 and 25 can be formed. In addition, the cut surfaces 26 and 27 of the fitting recess 32 and the fitting projection 34 press the roll provided with the projection against the fitting recess 32 and the fitting projection 34 in a heated state or immediately after extrusion. Can be molded.

  Further, as another example of the reclose clip of the present invention, a reclose clip 501 shown in FIG. 9 has a so-called hermaphroditic structure that has the same shape instead of the fitting members 3 and 5 in the reclose clip 1. The fitting members 4 and 6 are employed. The fitting part 40 in the fitting members 4, 6 has two convex parts 42, and the mating convex part 42 is fitted into a concave part formed between the two convex parts 42. In the reclose clip 501, a single band-shaped member having the same cross-sectional shape as the fitting members 4 and 6 is prepared, and the band-shaped member is folded at a fold in the width direction to form a single-open structure. The fitting members 4 and 6 can be formed. Therefore, the user can determine the starting point (folding portion) of the fitting, and the starting operation for sandwiching the packaging bag 7 becomes easy. Further, such a reclose clip 501 is a single band-like member at the time of storage, and can be stored in a wound state, so that it can be stored at the time of storage.

The physical property evaluation methods used in the text are as follows.
(Evaluation methods)
(1. Elastic modulus JIS-K-7161, 7162)
A test piece injection-molded to a specified standard dimension was pulled at a rate of 1 mm / min with a tensile / compression tester, and a strain value of 2% was measured.
(2. Pressure resistance)
Air was continuously applied to the zipper bag by applying air, and the peak value of the internal pressure at the moment of rupture was measured using a burst strength tester (mocon SKYE2000a). (Pressure speed (30 psi / min)
(3. Clipping evaluation method)
Immediately after opening a 20cm x 26cm potato chip packaging bag (polypropylene / polyethylene / aluminum vapor deposition, film thickness 70 μm, three-sided seal) containing 50 g, it is resealed with a clip. The method was evaluated.
-Workability Sensory evaluation was performed on the ease of stopping the clip according to the following criteria.
○: Can be easily stopped △: Difficult to stop ×: Does not stop Storability Storability when storing two packaging bags in a part of a cupboard (20cm x 20cm x 30cm) Was subjected to sensory evaluation according to the following criteria.
○: Can be easily stored △: Difficult to store ×: Cannot be stored ・ Sealing property The packaging bag resealed with a clip is left in a space of room temperature 23 ° C. and humidity 50%, and after 72 hours, the hygroscopicity is measured according to the following criteria. And sensory evaluation.
○: Do not feel moisture △ Feel a little moisture × Clearly feel moisture

  EXAMPLES Hereinafter, although an Example and a comparative example demonstrate this invention concretely, this invention is not limited at all by these.

[Example 1]
A polypropylene resin having a glass transition point of −60 ° C. and an elastic modulus of 700 MPa (JIS-K-7161, 7162) is 3 Kg / hr while adjusting the heating conditions so that the concave die outlet temperature becomes 190 ° C. with a melt extruder. Melting and extruding at a speed, forming a 50 μm polypropylene film prepared in advance at 3 m / min while making contact with the melted resin, then cooling and winding to form a recess with a clearance of 0.6 mm and a height of 2.0 mm Manufactured. Further, similarly, a convex part having a height of 2.0 mm was manufactured using a convex die while feeding the substrate film at 8 m / min. Thereafter, the concave and convex portions were fitted and adjusted to an appropriate length, and one side was adhered with a seal to produce a reclose clip. Evaluation of clip property is shown in Table 1.
[Example 2]
In the process of manufacturing in the same manner as in Example 1, a V-shaped notch for hand cutting (see reference numeral 24 in FIG. 5) and a cut surface (see reference numerals 26 and 27 in FIG. 5) are installed on the base film and the band-shaped member, respectively. did. According to the width of the packaging bag, the clip can be easily cut with a fingertip, and the workability is further improved in addition to the effects of the first embodiment. Evaluation of clip property is shown in Table 1.
[Comparative Example 1]
The concave and convex parts manufactured in Example 1 were combined and adjusted to a certain length, and both ends were crimped and fixed. The resealing function was as good as in Example 1, but because the length could not be adjusted because of the double-end stopper structure, the clip protruded significantly from the packaging bag, resulting in poor storage. Evaluation of clip property is shown in Table 1.

  As shown in Table 1, in Comparative Example 1, due to the both-ends stop structure, workability and storage are not sufficient, but in Examples 1 and 2 having a single-open structure, workability and storage are Sufficient results have been obtained. Therefore, the usefulness of the single-open structure in the reclose clip 1 was confirmed.

  The reclose clip of the present invention is used when a plastic film packaging bag for storing liquid or solid materials such as food, household goods, toiletries, pharmaceuticals, miscellaneous goods, etc. is opened once and then resealed. It is suitable as a clip that has high sealing performance and high storage performance and can be resealed by a simple operation.

It is a perspective view which shows one Embodiment of the reclose clip of this invention. It is sectional drawing which shows the female member of the reclose clip of FIG. It is sectional drawing which shows the male member of the reclose clip of FIG. It is sectional drawing which shows a mode that the female member of FIG. 2 and the male member of FIG. 3 were fitted in the state which pinched | interposed the packaging bag. It is a perspective view which shows the female member of FIG. It is a perspective view which shows the male member of FIG. It is a figure which shows an example of the use condition of the reclose clip of FIG. It is a figure which shows the other example of the use condition of the reclose clip of FIG. It is sectional drawing which shows other embodiment of the reclose clip of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1,501 ... Reclose clip, 3 ... 1st fitting member, 5 ... 2nd fitting member, 7,107,117 ... Packaging bag, 7a ... Opening part of bag, 23 ... Opening part, 24, 25 ... Notch, 32 ... Fitting recess, 34 ... Base material part, 40 ... Fitting part, 52 ... Fitting convex part, 54 ... Base material part, 109 ... Steam release mechanism.

Claims (5)

A reclosing clip that reseals the opening of the bag by sandwiching the opening of the bag from the outside,
Comprising first and second fitting members that can be fitted together with the bag sandwiched therebetween,
The first and second fitting members have a single-open structure in which one ends in the longitudinal direction are connected to each other and the other ends are opened,
The reclose clip, wherein the first and second fitting members are made of a plastic whose matrix component is less than 0 ° C. The first and second fitting members are respectively
A base part, and a fitting part that is provided on the base part and fits with the other party;
2. The reclose according to claim 1, wherein an opening or a notch is formed in the base material portion to facilitate cutting the first and second fitting members in the width direction. clip. The first and second fitting members are
The reclose clip according to claim 1, wherein the fitting portions have the same shape as each other.   The said bag is a package for foodstuffs, The reclose clip of any one of Claims 1-3 characterized by the above-mentioned.   The reclose clip according to any one of claims 1 to 3, wherein the bag includes a vapor venting mechanism for heating the microwave oven.

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