JPH0948442A - Packaging material for easy unsealing, packaging bag for easy unsealing by use thereof and package for easy unsealing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To satisfy various functions such as shock-resistance, environmental stress cracking-resistance, stability of seal, retension of fragrance, preservative stability, easy unsealing, etc., and adapt the material for a charging pack for a refilling detargent or the like, which is convenient for the handling. SOLUTION: This bag is made of a laminate body composed of two layers of the inner layer made of a resin film 1 having a heat-sealing property and the outer layer made of a resin film 2 excellent in the strength. An extensible tape 3 for unsealing is provided at a position P corresponding to the optimum unsealing position at the time when a package body has been completed, on either an outer layer film or an inner layer film constituting the laminate body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an easy-open packaging material, an easy-open packaging bag and an easy-open package using the same. The present invention relates to a suitable easy-open packaging material, an easy-open packaging bag and an easy-open package using the same.

[0002]

2. Description of the Related Art Conventionally, various packaging bags have been proposed as packaging bags suitable for refilling detergents and the like. One of them is a linear low-density polyethylene and ethylene-butene having an innermost layer. -1 copolymer blend film, a middle layer is a biaxially oriented polyolefin film, and an outermost layer is a biaxially oriented nylon film. JP-A-5-193079, JP-A-5-245990, JP-A-5-278747, etc.). It has been proposed that it is excellent in impact resistance and environmental stress cracking resistance, and has good openability.

[0003]

However, in the packaging bag proposed above, the intermediate layer is considered to exist only for tearing the packaging bag at the time of opening to maintain easy-openability. The biaxially stretched polyolefin film used as the intermediate layer has a ratio MD / TD of 2 or more of the degree of orientation MD in the flow direction and the degree of orientation TD in the direction crossing the flow direction by the infrared two-color method. Therefore, there is a problem that the adhesive strength to the film constituting the innermost layer and the outermost layer is weak, and the layers easily peel off with time. In addition, in the packaging bag proposed above, it is thought that the intermediate layer exists only for tearing the packaging bag to provide easy-opening properties. It leads to. By the way, packaging bags suitable for filling and packaging such as refilling detergents include impact resistance, environmental stress cracking resistance, seal stability,
Various important properties such as fragrance retention are required, and they must be rich in storage stability and the like, which may make it difficult to open easily when opening a packaging bag. is there. In addition, as a packaging bag suitable for filling and packaging such as a refilling detergent, the contents must be transferred to a detergent container at the time of use, and therefore, the packaging bag has a moderate strength, rigidity, etc. It must be convenient to handle with the above, and must be easy to open when opening. Therefore, the present invention satisfies various functions such as impact resistance, environmental stress cracking resistance, seal stability, fragrance retention, storage stability, easy opening property, etc., and is convenient for handling. The purpose of the present invention is to provide a packaging bag suitable for filling and packaging such as.

[0004]

Means for Solving the Problems As a result of intensive studies to solve the above problems and achieve the object, the present inventor has found that a resin film having rigidity and the like and having excellent strength is used as an outer layer. On the other hand, as the inner layer, using a resin film having a heat-sealing property, and further as a film of either the outer layer or the inner layer, at a position corresponding to the optimum opening position when it becomes a package. Providing a stretch tape for opening,
Then, both of them are laminated to produce a laminated body composed of two layers, and thereafter, using the laminated body, the film surfaces of the resin having heat sealability of the laminated body are opposed to each other. A bag for packaging is manufactured by superposing and heat-sealing the peripheral edges, and then a refilling detergent is filled from the opening of the packaging bag, and the opening is further sealed and sealed. The present invention has been completed by finding that the above technical problems can be solved and the object can be achieved by manufacturing a package by using the above-mentioned method.

That is, the present invention comprises a two-layer laminate in which the inner layer is a resin film having heat-sealing properties and the outer layer is a resin film having excellent strength, and the laminate is constituted. The easy-open packaging material is characterized in that a stretchable tape for unsealing is provided at a position corresponding to the optimum unsealing position when the film is formed into the inner layer or the outer layer.

Further, the present invention comprises a two-layer laminate in which the inner layer is a resin film having heat sealability and the outer layer is a resin film having excellent strength, and the laminate is constituted. A film for either the inner layer or the outer layer, which is a packaging material for easy opening, which is provided with a stretching tape for opening at a position corresponding to the optimum opening position when it becomes a package,
A bag for easy-opening packaging, characterized in that the surfaces of the inner layers are opposed to each other and overlapped with each other, and a peripheral edge portion is heat-sealed to provide a seal portion.

Furthermore, the present invention comprises a two-layer laminate in which the inner layer is a resin film having heat sealability and the outer layer is a resin film having excellent strength, and the laminate is Either the inner layer or the outer layer constituting the film, an easy-open packaging material provided with a stretch tape for opening at a position corresponding to the optimum opening position when it becomes a package,
It is composed of an easy-open packaging bag in which the surfaces of the inner layers are opposed to each other and the peripheral edges are heat-sealed to provide a seal portion, and the contents are filled and packaged from the opening portion. Then
An easily openable package characterized in that the opening is sealed.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in more detail below. In the present invention, a resin film having rigidity and the like and having excellent strength is used as a basic material constituting a packaging bag, and various functions required as a packaging bag for filling and packaging the above-mentioned refilling detergent and the like can be achieved as much as possible. On the other hand, a stretch tape for opening is adopted as a means for easy opening, which is provided on any one of the above-mentioned two layers of film, and is further formed into a bag by a resin film having the heat-sealing property. By imparting heat sealability at the time, an easily openable packaging material, an easily openable packaging bag, and an easily openable package suitable for filling and packaging of a refilling detergent or the like are produced.

First, a film of a resin having a heat-sealing property which is used as an inner layer in the present invention will be described. The resin film may be one that can be melted by heat and fused to each other. For example, low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ionomer resin, ethylene-ethyl acrylate copolymer, ethylene-
Acrylic acid copolymer, ethylene-propylene copolymer,
A resin film or sheet made of one or more resins such as methylpentene polymer and the like can be used. The thickness of the film is 50μ
m or more, more preferably 100 μm or more, especially 1
30 μm to 500 μm is desirable. In particular, in the present invention, a film of a resin having heat sealability is
About 2 to 20 for a resin film having strength
It is desirable to have a thickness of about twice, preferably about 4 to 10 times. In the present invention, by using a film having a thickness as described above, the rigidity, strength, etc. of the film are increased, and in combination with the physical properties of the resin film having excellent strength, etc., when a packaging bag is formed. It has the advantage that the posture of the bag is maintained well, the refilling work by the consumer is easy, and the handling at the store is convenient during the distribution process. To do. By the way, in the present invention, among the resin films as described above, a linear low-density polyethylene or an ethylene-vinyl acetate copolymer is particularly preferable as a resin film having a heat-sealing property used as an inner layer. It is most preferable to use a film or sheet mainly composed of That is, the film mainly composed of the linear low-density polyethylene or the ethylene-vinyl acetate copolymer has the advantage that the propagation of breakage is small and the impact resistance is improved because it has adhesiveness. Since the inner layer is constantly in contact with the detergent, it is also effective for preventing deterioration of the environmental stress cracking resistance. In the present invention, the linear low-density polyethylene or ethylene-vinyl acetate copolymer may be blended with another resin. For example, by blending an ethylene-butene copolymer or the like, heat resistance may be slightly increased. Although it is inferior in property and the seal stability tends to deteriorate in a high temperature environment, tearability improves,
There is an advantage that it contributes to easy opening.

The stretch tape for opening in the present invention will be described below. Examples of the stretch tape include polyethylene, polypropylene, polyvinyl chloride, polyvinylidene chloride, polyester, polyamide, polystyrene, and the like. Cellulose acetate, polyvinyl alcohol, polyacrylonitrile, ethylene-vinyl alcohol copolymer, using a uniaxially or biaxially stretched film or sheet made of a resin such as,
It is possible to use one that is processed into a tape shape. The thickness is several μm to several hundreds μm, specifically, 30 μm to 300 μm, preferably 50 μm.
It is preferable to use those having a diameter of about μm to 70 μm, and the stretching ratio thereof is such that, if the stretching ratio is uniaxial, the stretching ratio is about 2 to 10 times in one direction, or bidirectional. As long as it is stretched in the above-mentioned manner, it is possible to use one stretched in the longitudinal direction by about 2 to 10 times and in the transverse direction by about 2 to 5 times. The width of the tape is about 3 mm to 200 mm,
Preferably, in consideration of tearability and the like, those having a size of 3 mm to 10 mm are desirable.

Next, in the above-mentioned present invention, a resin film having rigidity and excellent strength used as an outer layer will be explained.
Since it is the basic material that makes up the packaging bag, mechanical,
A resin film or sheet having excellent properties in physical, chemical, etc. can be used, and specifically, for example, polyester resin, polyamide resin, polyaramid resin, polypropylene resin And a film or sheet of a tough resin such as a polycarbonate resin, a polyacetal resin, a fluorine resin, or the like. Thus, as the resin film or sheet, any one of an unstretched film and a stretched film stretched in a uniaxial or biaxial direction can be used. Further, in the present invention, the thickness of the resin film may be a thickness that can be kept to the minimum necessary for strength, rigidity, etc., and if it is too thick, tearability is lowered and cost is increased. However, if it is too thin, on the other hand, the strength, rigidity, etc. will decrease, which is not preferable. In the present invention, for the above reasons, it is about 10 μm to 50 μm.
Most preferred is about 12 μm to about 25 μm. By the way, in the present invention, among the resin films as described above, the resin film as the outer layer has rigidity, mechanical toughness, bending resistance, puncture resistance, impact resistance, and abrasion resistance. It is most preferable to use a biaxially stretched polyamide film that has excellent physical properties such as abrasion resistance, cold resistance, heat resistance, and chemical resistance, and also has printability. Further, the biaxially stretched polyamide film has an advantage that its orientation is close to the flow direction of the film, and tear deviation is very small even when laminated. Examples of such a biaxially stretched polyamide film include nylon films such as nylon-6, nylon-66, nylon-11, nylon-12, nylon-6,10, and the like. A vinylidene chloride biaxially stretched film or the like can be used.

Next, in the above-mentioned present invention, the above-mentioned resin film having heat sealability as the inner layer and the resin film having excellent strength as the outer layer are laminated to form two layers. Explaining how to make a body,
As such a method, a method of laminating a usual packaging material, for example, a wet lamination method, a dry lamination method, a solventless dry lamination method, an extrusion lamination method, a T-die co-extrusion molding method, It can be performed by a coextrusion lamination method or the like. Thus, in the present invention, when performing the above-mentioned lamination, if necessary, a pretreatment such as a corona treatment or an ozone treatment can be performed on the film, and for example, an isocyanate-based (urethane) Series), polyethyleneimine series, polybutadiene series, organic titanium series etc.
Polyurethane, polyacrylic, polyester, epoxy, polyvinyl acetate,
Known anchor coating agents, adhesives and the like, such as cellulose and other laminating adhesives, can be used.

Further, in the above-mentioned present invention, a stretchable tape for unsealing is provided on a film corresponding to an optimum unsealing position in a package, in either the inner layer or the outer layer constituting the laminate. Explaining the method of providing, as such a method, there are various methods. For example, a film of a resin having heat sealability as an inner layer and excellent strength as an outer layer are given as a few examples. A method for producing a laminate comprising two layers of a resin film and a method for providing an unsealing stretch tape on the surface of either the inner layer or the outer layer constituting the laminate, or as an inner layer Either the film of the resin having heat-sealing property or the resin film having excellent strength as the outer layer, that is, in the state of the single film before the lamination, it is wrapped in advance. Body since optimal opening opening for drawing in locations corresponding to the position Te of time was - the provided flop can be performed by a method such as to produce a laminate consisting of two layers and thereafter laminating both. Furthermore, two layers of a resin film having heat-sealing property and a resin film having excellent strength are laminated to produce a laminate, and then the laminate is made to face the inner layers thereof. Overlap and then touch the peripheral edge
The bag is manufactured by providing a seal part by tossing, and then a resin film having excellent strength as an outer layer constituting the bag is suitable for the optimum opening position when the package is formed. It can also be carried out by a method in which a stretched tape for opening is provided at the location. Therefore, in the present invention, a stretching tape for opening is used.
For example, a method of bonding using an adhesive or a pressure-sensitive adhesive, etc., in particular, a release paper or the like is used for the stretchable tape for opening, and the release paper is peeled off at the time of use. It can be performed by a method such as pasting. The above-mentioned adhesives, pressure-sensitive adhesives, etc. may be the above-mentioned laminin.
Similarly, an adhesive for adhesives, a known adhesive or the like can be used.

Next, in the present invention, the easy-open packaging bag according to the present invention will be described. There are various configurations of the easy-open packaging bag, and some examples thereof will be used with reference to the drawings. 1 is a plan view showing a configuration of a first easy-open packaging bag according to the present invention, and FIG. 2 is a cross-section taken along line AA ′ of the easy-open packaging bag according to FIG. FIG. 3 is a plan view showing an easy-open packaging body in which the contents are filled and packaged in the easy-open packaging bag.
As shown in FIGS. 1, 2 and 3, the first easy-open packaging bag according to the present invention is a resin film 1 having an inner layer having a heat seal property and an outer layer. Is a resin film 2 having excellent strength and is composed of a two-layer laminate, and the resin film 2 having excellent strength, which constitutes the laminate,
A stretchable tape 3 for opening is provided at a position P corresponding to an optimum opening position when a package is formed to form a packaging material for easy opening, and a film of a resin having a heat-sealing property of its inner layer. The first and second surfaces are opposed to each other and overlapped with each other, and further, the peripheral end portions thereof are heat-sealed to provide a seal portion 4. Thus, in the present invention, the bag for easy-open packaging produced above is used, and, for example, the refilling detergent X (solution or powder) is filled from the opening Q thereof,
After that, the opening Q is heat-sealed to form the seal portion 5, so that the easily openable package according to the present invention can be manufactured. In the above example, if necessary, when a package is formed, an I-shape or a V-shape is further provided at the position of the heat seal portion 4 to which the above-mentioned opening stretch tape 3 is attached. It is also possible to engrave an opening cut 6 such as a letter shape.

A second example of the present invention will be described below. FIG. 4 is a plan view showing the structure of a second easy-open packaging bag according to the present invention, and FIG. 4 is a cross-sectional view taken along line BB ′ of the easy-open packaging bag according to FIG. 4, and FIG. 6 is a plan view showing an easy-open packaging body in which contents are packed in the easy-open packaging bag. Is. Thus, as shown in FIGS. 4, 5 and 6, the second embodiment of the present invention
The easy-open packaging pouch comprises a two-layer laminate in which the inner layer is a resin film 1 having heat sealability and the outer layer is a resin film 2 having excellent strength. To the film 1 of the resin having heat sealability constituting
A stretchable tape 3 for opening is provided at a position P corresponding to an optimum opening position when a package is formed to form a packaging material for easy opening, and a film of a resin having a heat-sealing property of its inner layer. The first and second surfaces are opposed to each other and overlapped with each other, and further, the peripheral end portions thereof are heat-sealed to provide a seal portion 4. In the above, in the case where the unsealing stretch tape 3 is provided on the film 1 surface of the resin having heat sealability,
In the seal portion 4 constituting the bag body, the opening drawing tape
When the surfaces of the surfaces 3 and 3 do not face each other and the heat seal does not occur, it is possible to partially apply the above-mentioned resin film having the heat seal property to the heat seal to perform the heat seal. desirable. Alternatively, in the above case, when the stretchable tape 3 for unsealing is provided on the surface of the film 1 of the resin having heat sealability, the film is unsealed except for the portion corresponding to the seal portion 4 constituting the bag. The stretchable tape 3 may be provided to manufacture the easy-open packaging bag according to the present invention. Thus, in the present invention, the easy-open packaging bag produced above is used, and, for example, the refill detergent X (solution or powder) or the like is filled from the opening Q, and then the opening. By heat-sealing Q to form the seal portion 5, the easily openable package of the present invention can be manufactured. In the above example, if necessary, the heat seal part 4 to which the above-described opening tape 3 for opening is adhered when it becomes a package.
It is also possible to further engrave an I-shaped or V-shaped opening break 6 at this position.

Next, in the present invention, as a bag-making method of the easily-openable packaging bag, for example, the above-mentioned inner layer is heat-sensitive.
Optimal unsealing position when a package is formed on a resin film having excellent strength and a resin film having excellent strength, and the outer layer is a resin film having excellent strength. The packaging material for easy opening provided with a stretch tape for opening at a position corresponding to, is folded or overlapped, the film surface of the resin having the heat seal property of the inner layer is opposed, and further For example, the peripheral edge portion may be a side seal type, a two-side seal type, a three-side seal type, a four-side seal type, an envelope sticking seal type, a palm sticking seal type (pyro seal).
Type), pleated seal type, flat-bottomed seal type, square-bottomed seal type, etc. and various easy-open seals according to the present invention by heat-sealing in accordance with the heat-sealing type. A plastic packaging bag can be manufactured. In addition, for example, a self-supporting packaging bag (standing pouch) can be used. In the above, as the heat seal method, for example, known are bar seal, rotary roll seal, belt seal, impulse seal, high frequency seal, ultrasonic seal and the like. Can be done by the method.

Next, in the present invention, as described above, for example, a refilling detergent (solution or powder) or the like is filled from the opening of the easily opened packaging bag produced above, and then, The opening portion can be heat-sealed to form a seal portion, whereby the easy-open packaging body according to the present invention can be manufactured. Thus, the above easily-openable package satisfies various functions such as impact resistance, environmental stress cracking resistance, seal stability, fragrance retention, storage stability, etc., and can be used in the distribution stage, etc. There are no packaging problems, and the bag is
The bag has rigidity and is convenient for handling. In particular, at the time of opening the bag, the bag can be easily torn from the opening break to open the bag, and the bag is easy to handle.

[0018]

EXAMPLES Next, the present invention will be described in more detail with reference to examples. Example 1 Biaxially stretched nylon film having a thickness of 15 μm and a thickness of 130
A linear low-density polyethylene film having a thickness of μm was prepared, and a polyurethane adhesive was used to laminate them by a dry lamination method, which is a conventionally known method, to produce a two-layer laminate. Next, using the laminate, a front wall, a rear wall, and an inverted V-shaped bottom wall are molded, and the nylon film surfaces on the outer surfaces of the front wall and the rear wall are formed into a package. Using a stretch tape for unsealing, which is made of uniaxially stretched polypropylene with a width of 5 mm and which has been previously processed with a pressure sensitive adhesive made of an acrylic resin, is stuck at a position corresponding to the optimum opening position, Then, using the front wall, the rear wall, and the inverted V-shaped bottom wall, their linear low-density polyethylene film surfaces are opposed to each other, and the peripheral edges thereof are heat-sealed to make a standing pouch ( Self-supporting bag) was manufactured. Then, using a standing pouch provided with the above-mentioned stretchable tape for opening, 500 ml of the liquid detergent for refilling is filled from the opening, and then the opening is heat-sealed and hermetically sealed. Was manufactured. In addition, an I-shaped opening for opening was also formed in the seal portion of the package including the opening-extending tape. In the same manner as above, 10 bags of the package were manufactured.

Example 2 In Example 1 above, a 5 mm wide polyamide stretch tape was used in place of the 5 mm wide polypropylene stretch tape for opening, except for the above examples. In the same manner as in 1 above, 10 bags of the package according to the present invention were manufactured.

Comparative Example The same procedure as in Example 1 was repeated except that the stretch tape for unsealing was not used in the above Example 1 to produce 10 bags. An unsealing cut was made in the seal portion, and that portion was used as the unsealing portion.

Experimental Example Using the packages produced in Examples 1 and 2 and Comparative Example described above, the following comparative tests were conducted. (Comparative test) Test 1 Opening test: Each of the 10 bags of the package produced as described above was opened using the opening tape for opening and the breaking line for opening, and at that time, the cut edge was displaced from the drawing tape for opening. I confirmed the number. Test 2 Drop impact test: For each 10 bags of the above-produced packaging, each packaging was dropped 20 times perpendicularly to the concrete surface from a height of 120 cm, and the tearing of the bag at the top and bottom of the bag was examined. It was Test 3 Compressive strength test: For each of the 10 bags produced above, the number of bag breaks and the film elongation of the processed portion were examined when a load of 50 kg was applied for 10 minutes. Test 4 Environmental stress cracking test: Ten bags of the above-prepared packages were examined for cracks and liquid leakage when stored at a temperature of 50 ° C. for 4 weeks.

As a result of the above experiment, the results shown in Table 1 below were obtained.

[Table 1]

In the above, the numerical value of the openability means (the number of cuts displaced from the opening for opening) / (the number of tests), and the number of drop impact strength is (the number of bag breaks) / (the number of tests). ) Means. As is clear from the above table, the package according to the present invention was extremely excellent in openability, impact resistance, pressure resistance, environmental stress cracking resistance and the like.

[0024]

As is apparent from the above description, the present invention uses a resin film having rigidity and the like and having excellent strength as the outer layer, while the inner layer is made of a resin having a heat seal property. The film is used, and thus both are laminated to produce a laminate composed of two layers, and further, on either of the inner layer or the outer layer constituting the above laminate,
A stretched tape for unsealing is provided at a position corresponding to the optimum unsealing position when it becomes a package, and then the laminate is used,
The laminate is heat-sealed so that the film surfaces of the resin are opposed to each other and the peripheral edges of the laminate are heat-sealed to produce a packaging bag, and then the opening of the packaging bag is formed. It is characterized in that a refilling detergent is filled in, and the opening is sealed and hermetically sealed to produce a package. Thus, according to the present invention, impact resistance, environmental stress cracking resistance, seal stability, aroma retention,
It fulfills various functions such as storage stability and there are no packaging problems at the distribution stage, and the bag is rigid and convenient to handle. The bag can be easily torn by opening from the bag, and an easily openable package that can be easily handled can be produced.

[Brief description of drawings]

FIG. 1 is a plan view showing a configuration of a first easy-open packaging bag according to the present invention.

FIG. 2 is A- of the first easy-open packaging bag in FIG.
It is a sectional view taken along line A '.

FIG. 3 is a plan view showing the configuration of an easy-open packaging body in which the contents are filled and packaged in the first easy-open packaging bag according to the present invention.

FIG. 4 is a plan view showing the configuration of a second easy-open packaging bag according to the present invention.

FIG. 5 is a B- of the second easy-open packaging bag in FIG.
It is a sectional view taken along the line B '.

FIG. 6 is a plan view showing the configuration of an easily openable package in which the contents are filled and packaged in a second easily openable packaging bag according to the present invention.

[Explanation of symbols]

 1 Resin film having heat-sealing properties 2 Resin film having excellent strength 3 Stretching tape for opening 4 Seal part 5 Seal part of opening 6 Break for opening P Equivalent to the optimum opening position Where to do Q Opening X Contents

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hidehiko Masaki 1-1-1, Ichigaya-Kaga-cho, Shinjuku-ku, Tokyo Dai Nippon Printing Co., Ltd.

Claims (10)

[Claims] 1. An inner layer or an outer layer which comprises a two-layer laminate in which the inner layer is a resin film having heat sealability and the outer layer is a resin film having excellent strength. An easy-open packaging material, characterized in that any one of the films is provided with an unsealing stretch tape at a position corresponding to an optimum unsealing position when it becomes a package. 2. The film according to claim 1, wherein the heat-sealing resin film comprises a film mainly composed of linear low-density polyethylene or ethylene-vinyl acetate copolymer. Easy opening packaging material. 3. The packaging material for easy opening according to claim 1 or 2, wherein the resin film having excellent strength is a stretched polyamide film. 4. The easy-opening tape according to claim 1, wherein the unsealing stretched tape comprises a stretched tape having a narrow width of 3 mm to 10 mm and uniaxially stretched. Packaging material. 5. An inner layer or an outer layer which comprises a two-layer laminate in which the inner layer is a resin film having heat-sealing properties and the outer layer is a resin film having excellent strength. Which is an easy-open packaging material in which a stretched tape for opening is provided at a position corresponding to the optimum opening position when it becomes a package, and the surface of the inner layer is laminated so as to face each other. Align, and further touch the peripheral edge
An easy-open packaging bag, characterized in that it is provided with a sealing part. 6. The film according to claim 5, wherein the resin film having heat-sealing property is a film mainly composed of linear low density polyethylene or ethylene-vinyl acetate copolymer. Easy to open packaging bag. 7. The easy-open packaging bag according to claim 5 or 6, wherein the resin film having excellent strength is a stretched polyamide film. 8. The easy-opening tape according to claim 5, 6 or 7, wherein the stretchable tape for unsealing comprises a stretched tape stretched uniaxially with a narrow width of 3 mm to 10 mm. Sex packaging bag. 9. An inner layer or an outer layer which comprises a two-layer laminate in which the inner layer is a resin film having heat-sealing properties and the outer layer is a resin film having excellent strength. Any of the film, the easy-open packaging material provided with a stretchable tape for opening at a position corresponding to the optimum opening position when it becomes a package, the surface of the inner layer is overlapped, Further, it consists of an easily-openable packaging bag which is heat-sealed at its peripheral end and provided with a seal portion, and further, the contents are filled and packaged through the opening, and the opening is sealed. An easy-open packaging body characterized in that 10. The easily openable package according to claim 9, wherein the content is a refill detergent.