JP2013049474A - Easily-peelable packaging bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an easily-peelable packaging bag capable of being easily opened, wherein a packaging material does not adhere between the front and back of a non-seal part and a peel-off part is easily grasped.SOLUTION: In an easily-peelable packaging bag in which sealant layer surfaces of a packaging material are sealed and adhered with each other using the packaging material having easy peelability obtained by laminating a sealant layer having the easy peelability on a back surface of a base material and which has a non-seal part at an outer edge of a peeling start part for opening of the seal part subjected to the seal adhesion, emboss processing is applied to the non-seal part of the packaging material at one of the front and back.

Description

  The present invention relates to an easy peel packaging bag.

  Conventionally, it is a sealed soft packaging bag that seals the sealant layers, which are the innermost layers of packaging materials, and stores contents such as foods. When opening the contents, the part of the seal is easily peeled off (peeled) Easy-peel packaging bags and containers from which things can be taken out are known, and many are used in various fields such as food and cosmetics and pharmaceuticals.

  The easy peel property refers to the property that the seal part is easily peeled (peeled) by hand and has a certain degree of peel strength, and is a JIS-Z0238 heat seal soft packaging bag and a semi-rigid container test method bag. According to the standard of heat seal strength according to the purpose of use, when the heat seal strength may be small with an easy peel bag or the like, 3N / 15 mm or more, and when normal heat seal strength is required, 6 N / 15 mm or more.

  In such an easy peel packaging bag, the sealant layers of the packaging material are sealed and bonded to each other by using an easy peel packaging material in which a sealant layer having an easy peel property is laminated on the back surface of the base material. There is an easy peel packaging bag which has a non-sealing portion at the outer end of the peeling start portion for opening of the bonded sealing portions, and peels off and opens the two packaging materials of the non-sealing portion.

  The sealant layer having the easy peel property of such an easy peel packaging bag is a blend of polypropylene or polybutene-1, which is based on low density polyethylene and causes cohesive failure at the time of peeling, at least on the sealed surface side of the seal surface. Many resins are used.

  In this easy-peeling packaging bag, if the two front and back packaging materials of the non-sealed part are in close contact with each other, the handle to be peeled off cannot be grasped and it may be difficult to open.

Therefore, the sealant layer having an easy peel property is made to be curled so that the two packaging materials of the non-sealed part are separated from each other, and the laminated layer on the base material side and the sealed layer on the inner surface side The layer to be laminated is a resin mainly composed of high-density polyethylene having a density of 0.94 g / cm ² or more, and the resin to cause cohesive failure is added to the low-density polyethylene. There was an easy peel packaging bag made of an easy peel resin (Patent Document 1).

  Known documents are shown below.

JP 2002-225934 A

As described in Patent Document 1, it is possible to curl the two packaging materials of the non-sealed part so that they are separated from each other, but controlling the degree of curling is also affected by the waist of the base material. Difficult. Extremely curled, the appearance is poor. Further, when sealing the seal part, the non-seal part may be in a pseudo-sealed state due to the heat of the seal. Furthermore, when cutting easy-peeling packaging bags that are continuously made into individual easy-peeling packaging bags, the cutting blade may not be cut well, and the packaging material at the time of cutting may be crimped. .

  The present invention has been made in view of the above-described circumstances, and provides an easy peel packaging bag in which the packaging material on the front and back of the non-sealed portion is not in close contact, the handle to be peeled off is easy to grasp, and can be easily opened. It is an issue.

  The invention according to claim 1 of the present invention uses an easy peel packaging material in which a sealant layer having an easy peel property is laminated on the back surface of a base material, and the sealant layer surfaces of the packaging material are sealed and bonded together. An easy peel packaging bag having a non-sealing portion at an outer end of a peeling start portion for opening of the seal-bonded sealing portion, and embossing at least on the non-sealing portion of the front or back packaging material It is an easy peel packaging bag characterized by being processed.

  The invention according to claim 2 of the present invention is characterized in that a distance between apexes of the embossed convex portion is 1 mm or more and 10 mm or less, and a height of the convex portion is 1 mm or more and 5 mm or less. It is an easy peel packaging bag according to claim 1.

  The easy-peeling packaging bag of the present invention is configured as described above, and is sealed because the non-sealed portion of the outer end of the peeling start portion of at least one of the front and back packaging materials is embossed. Sometimes the non-sealed part does not become a pseudo-sealed state due to the heat of the seal, and it is crimped when cutting easy-peelable packaging bags made continuously into individual easy-peelable packaging bags Also, the embossing that has been applied will always create a part where the non-sealed parts of the front and back packaging materials are not in close contact, so the front and back packaging materials can be easily grasped with fingers and opened easily. Can do. Moreover, since the uneven | corrugated shape which carried out embossing plays the role of anti-slip | skid, opening becomes easy.

It is explanatory drawing which showed typically an example of the easy-peeling packaging bag of this invention. It is explanatory drawing which showed typically the state which opened the non-seal part of an example of the easy peelable packaging bag of this invention. It is explanatory drawing which showed typically the XX cross section of FIG. It is explanatory drawing which showed typically the arrangement | positioning shape of the embossing convex part of an example of the easy-peeling packaging bag of this invention. FIG. 4 is a partially enlarged view of FIG. 3.

Hereinafter, modes for carrying out the present invention will be described.
FIG. 1 is an explanatory view schematically showing an example of the easy peel packaging bag of the present invention.
FIG. 2 is an explanatory view schematically showing a state where an unsealed portion of an example of the easy peel packaging bag of the present invention is opened.
FIG. 3 is an explanatory view schematically showing the XX cross section of FIG. 1.
FIG. 4 is an explanatory view schematically showing an arrangement shape of embossed convex portions of an example of the easy peel packaging bag of the present invention.
FIG. 5 is a partially enlarged view of FIG.

  As shown in FIGS. 1 and 2, the easy-peel packaging bag 100 of this example is formed by overlapping the front side packaging material 10 and the back side packaging material 20 to form a seal part 1 that is sealed and sealed, and is surrounded by the seal part 1. The storage part 2 is formed between the front side packaging material 10 and the back side packaging material 20, and the non-sealing part 3 is provided at the outer end of the peeling start part 1 a for opening the seal part 1. FIG. 2 shows a state where the front side packaging material 10 and the back side packaging material 20 of the non-seal portion 3 of the easy peel packaging bag 100 of this example are opened.

  FIG. 3 is a cross-sectional view taken along the line XX in FIG. 1. In the non-sealed portion 3, the front side packaging material 10 is embossed and provided with irregularities. Further, the back packaging material 20 is not embossed.

  The height h of the embossed convex portion 4 is preferably 1 mm or more and 5 mm or less. If the thickness is less than 1 mm, the effect cannot be obtained. If the thickness exceeds 5 mm, winding after embossing tends to cause a winding deviation.

  The arrangement shape of the embossing projections 4 is not particularly limited. However, the embossing projections 4 are arranged in a zigzag pattern as shown in FIG. 4 in this example. The distance p between the vertices of the convex portions is preferably 1 mm or more and 10 mm or less. If the thickness is less than 1 mm, the height of the convex portion cannot be sufficiently obtained, and if it exceeds 10 mm, the convex portion 4 may not come to the end edge portion of the non-seal portion 3, and in that case, the effect cannot be obtained.

  FIG. 5 is an enlarged view of a circled portion of FIG. In the easy peel packaging bag 100 of the present invention, the front side packaging material 10 and the back side packaging material 20 are laminated films in which the sealant layers 12 and 22 having easy peel properties are bonded to the back surfaces of the base materials 11 and 21, respectively. It is made up of.

  Then, the sealant layers 12 and 22 of the front side packaging material 10 and the back side packaging material 20 are overlapped with each other and sealed to form a seal portion.

  As described above, the packaging material of the front side packaging material 10 and the back side packaging material 20 of the easy peel packaging bag 100 of the present invention is laminated with the sealant layers 12 and 22 having easy peel properties bonded to the back surfaces of the base materials 11 and 21. It is made of laminated film.

  For the base materials 11 and 12, polyester films such as polyethylene terephthalate and polyethylene naphthalate, polyolefin films such as polyethylene and polypropylene, polystyrene films, polyamide films, polyvinyl chloride films, polycarbonate films, polyacrylonitrile films, polyimide films, etc. Can be used.

  Moreover, you may use the vapor deposition film which provided the vapor deposition layer of the metal or the inorganic oxide in these. Furthermore, a metal foil such as an aluminum foil can be used. These films and foils can be used in a single layer, or can be combined and used in two or more layers.

  When the contents to be packaged in the storage unit 2 require barrier properties, it is preferable to use a vapor-deposited film or a metal foil laminated in one layer or in combination with other films. Further, when a metal foil such as an aluminum foil is used, embossing is easily applied, and there is no risk of unevenness being returned to flatness by the embossing, and the base materials 11 and 12 used in the easy peel packaging bag 100 of the present invention. Is particularly suitable.

As the sealant layers 12 and 22, a sealant having an easy peel property is used.
For example, a resin obtained by blending polypropylene or polybutene-1, which is based on low-density polyethylene and causes cohesive failure at the time of peeling, can be used for the sealing layer on the sealing surface side.

  Further, the sealant layers 12 and 22 may be a multilayer in which a high-density polyethylene is laminated on a layer to be laminated on the side laminated with a base material by a multilayer coextrusion method. By laminating high-density polyethylene with high water vapor barrier properties, the thickness of the blended resin based on low-density polyethylene with a low water vapor barrier property is reduced, and moisture absorption from the edge of the packaging material is reduced. Can do.

  A method for laminating the base materials 11 and 12 and the sealant layers 12 and 22 and a method for laminating the layers of the multilayer base materials 11 and 12 are not particularly limited, but a dry laminating method using an adhesive is preferably used. As the adhesive, a solvent type adhesive or a solventless type adhesive is used. When a solventless adhesive is used, a drying apparatus is unnecessary, and in particular, this is called a non-solvent dry lamination method.

  As the adhesive used in the dry lamination method, generally, polyurethane, polyacrylic, polyester, epoxy, polyvinyl acetate, and cellulose adhesives can be used. A liquid curable adhesive can be used.

  In addition to the laminating method of the dry laminating method, the sealant layers 12 and 22 may be extruded as a single layer or a multilayer of two or more layers by the extrusion laminating method and laminated on the base materials 11 and 12. Further, the base materials 11 and 12 and the sealant layers 12 and 22 may be laminated by a sandwich lamination method.

  You may provide a printing layer in the base materials 11 and 12. FIG. A printing layer is provided on the back surfaces of the base materials 11 and 12 and laminated with the sealant layers 12 and 22, or when the base materials 11 and 12 are multi-layered, a printing layer is provided and laminated on the back surface of the outer base material. do it.

  The embossing provided in the packaging material of the non-seal portion 3 of the easy peel packaging bag 100 of the present invention may be processed on a roll-feeding type bag making and filling machine. Further, after printing and laminating the front side packaging material 10 or the back side packaging material 20, the slitting process or a separate process may be used. When embossing is performed on both the front-side packaging material 10 and the back-side packaging material 20, the embossing is performed so that the tops of the embossing projections 4 provided on the front-side packaging material 10 and the back-side packaging material 20 are in contact with each other as much as possible. Is preferably provided.

  The embossing method is performed by winding the front side packaging material 10 or the back side packaging material 20 before making a bag between a metal embossing roll having irregularities corresponding to the embossing convex portions 4 on the surface and a receiving roll. You can process it. Moreover, you may perform an embossing by heating an embossing roll as needed.

  Bag making and filling may be carried out one bag at a time, filled with the contents, and hermetically sealed, but it is better to perform filling and sealing with a roll-feeding type bag making and filling machine. When the seal part 1 is sealed, the seal part 1 is aligned with the embossed non-seal part 3 in registration. For this reason, if the non-sealed portion 3 is printed in a color different from that of other portions, the registration at the time of sealing adhesion is easy to match, and the non-sealed portion 3 is easy to understand and open at the time of use.

As described above, since the manufactured easy peel packaging bag 100 of the present invention can be surely formed by the embossing applied, a portion that is not in close contact with the front-side packaging material 10 and the back-side packaging material 20 of the non-seal portion 3, The front-side packaging material 10 and the back-side packaging material 20 of the non-seal part 3 can be easily grasped with fingers and can be easily opened.

  Specific examples of the present invention will be described below.

<Example 1>
The front side packaging material 10 is prepared. First, a pattern printing layer was provided by gravure printing on the corona-treated surface of a polyethylene terephthalate film 12 μm which is the outermost surface, and an aluminum foil having a thickness of 15 μm was laminated on the surface of the pattern printing layer by a dry laminating method.

  Furthermore, a polyethylene terephthalate film having a thickness of 12 μm was laminated on the surface of the aluminum foil by a dry laminating method, and the base material 11 of the front side packaging material 10 in which the aluminum foil was sandwiched between the polyethylene terephthalate films was created.

  Next, an easy peel sealant film having a thickness of 30 μm to be the sealant layer 12 was laminated on the back surface of the polyethylene terephthalate film by a dry laminating method.

The easy peel sealant film is a co-extruded film of a laminate layer on the laminate surface side and a seal layer on the seal surface side, and the laminate layer is made of high density polyethylene having a density of 0.94 g / cm ² or more. A film made of a resin mainly composed of a resin to which a layer to be sealed is added a resin that cohesively breaks into low-density polyethylene was used.

  Next, the back side packaging material 20 is prepared. First, a white solid printing layer was provided by gravure printing on a corona-treated surface of a polyethylene terephthalate film 12 μm, and an aluminum foil having a thickness of 15 μm was laminated on the surface of the pattern printing layer by a dry laminating method.

  Furthermore, a polyethylene terephthalate film having a thickness of 12 μm was laminated on the surface of the aluminum foil by a dry laminating method, and the base material 21 of the back side packaging material 20 in which the aluminum foil was sandwiched between the polyethylene terephthalate films was created.

  Next, an easy peel sealant film having a thickness of 40 μm to be the sealant layer 22 was laminated on the back surface of the polyethylene terephthalate film by a dry laminating method.

  The easy peel sealant film with a thickness of 40 μm of the sealant layer 22 was also the same co-extruded film as the easy peel sealant film with a thickness of 30 μm of the sealant layer 12 and differed only in thickness.

  Next, in order to hang the front-side packaging material 10 and the back-side packaging material 20 on a bag-making machine, they were slit into a width for bag-making with a slitter, and wound up for bag-making.

  The front-side packaging material 10 and the back-side packaging material 20 that have been wound up for bag-making are set in a bag-making filling machine and unwound, and the front-side packaging material 10 includes the non-seal portion 3 of the easy peel packaging bag 100 and In this position, the embossing process was performed with an embossing roll in register with the pattern printing layer.

  The height h of the embossed projections 4 is 1 mm, and the vertices of the projections 4 are arranged in a staggered manner with a flow direction interval of 3 mm and a width direction interval of 5 mm.

  The sealant layer 12 of the front-side packaging material 10 and the sealant layer 22 of the back-side packaging material 20 subjected to the embossing are opposed to each other, and the sensor chip for measuring the blood sugar level of the contents is sandwiched between the storage unit 2 and the seal unit 1 Was sealed.

  After that, slitting and cutting were performed to obtain a filled easy peel packaging bag 100 that was cut for each bag. This easy peel packaging bag 100 is rectangular and has a shape as shown in FIG. 1 provided with a non-seal portion 3 at one end in the longitudinal direction. The width is 30 mm and the total length is 70 mm. The thickness was 8 mm, and the seal width of each side of the seal portion 1 was 3 mm. This was designated as the easy peel packaging bag of Example 1.

  Below, the comparative example of this invention is demonstrated.

<Comparative Example 1>
The embossing is performed not only on the position of the easy-peeling packaging bag of the front side packaging material 10 but also on the entire surface of the front side packaging material 10. A peelable packaging bag was obtained.

<Comparative example 2>
Easy peel packaging of Comparative Example 2 in the same manner as in Example 1 except that the embossing is not provided at the position where the non-seal portion 3 of the easy peel packaging bag 10 of the front side packaging material 10 is provided. A bag.

<Test method>
The easy-peeling packaging bags of Examples and Comparative Examples were tested by the following methods for comparative evaluation.

<Easy opening>
It was evaluated whether the packaging materials on the front and back of the non-sealed portions of the easy peel packaging bags of the example and the comparative example were easy to grasp and easy to open.

  Evaluation is easy when the unsealed portion of the packaging material can be easily grasped and opened easily, and the unsealed portion of the unsealed portion of the packaging material is difficult to grasp. The case where the packaging material on the front and back of the part could not be grasped and was difficult to open was marked as x. The results are summarized in Table 1.

<Dampproof>
The easy-peelable packaging bags of Examples and Comparative Examples were stored at 40 ° C. and 75% RH for 6 months to evaluate whether the performance of the sensor chip for measuring the blood glucose level of the contents was affected.

  The case where the performance of the sensor chip for measuring the blood glucose level was not changed was marked with ◯, and the case where the performance was clearly lowered was marked with x. The results are summarized in Table 1.

<Bag making and filling>
The processability at the time of bag-filling was evaluated. Those that could be filled without bag were marked with ◯, and those that had problems with bag filling were marked with x. The results are summarized in Table 1.

Below, the comparison result of an Example and a comparative example is demonstrated.

<Comparison result>
The easy-peeling packaging bag of the present invention of Example 1 is all good, and since the unsealed portion is embossed when opened, the front side packaging material 10 and the back side packaging material 20 are easily separated. The sensor chip for measuring the blood glucose level of the contents was not deteriorated after 6 months storage at 40 ° C and 75% RH at high temperature and high humidity, and the bag filling process Could be done without any problems.

  On the other hand, the easy peelable packaging bag of Comparative Example 1 was able to be opened without any problem in the same way as the easy peelable packaging bag of Example 1 in terms of easy opening, but the shelf life was 40 ° C. and 75% RH. After storage for 6 months, deterioration of the performance of the sensor chip for measuring the blood glucose level of the contents was observed. In addition, the bag-filling process has a problem in that the convex portion is crushed at the seal portion, and the packaging material is easy to move and meander.

  In addition, the easy peel packaging bag of Comparative Example 2 had no particular problem in moisture proofing or bag filling and filling, but grips the front-side packaging material 10 and the back-side packaging material 20 of the non-sealed portion in terms of easy opening. Could not be opened.

DESCRIPTION OF SYMBOLS 100 ... Easy peel packaging bag 10 ... Front side packaging material 20 ... Back side packaging material 11, 21 ... Base material 12, 22 ... Sealant layer 1 ... Seal part 1a ... Peeling Start part 2 ... storage part 3 ... non-seal part 4 ... convex part h ... height p ... distance

Claims (2)

  Using an easy-peeling packaging material in which an easy-peeling sealant layer is laminated on the back surface of the base material, the sealant layer surfaces of the packaging material are sealed and the seal-sealed seal portion is opened. An easy peel packaging bag having a non-seal part at the outer end of the peeling start part for the above, wherein the non-seal part of at least one of the front and back packaging materials is embossed Easy peel packaging bag.   The easy-peel packaging bag according to claim 1, wherein a distance between apexes of the embossed convex portion is 1 mm or more and 10 mm or less, and a height of the convex portion is 1 mm or more and 5 mm or less. .