JP2013001440A - Easy-to-cut pouch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an easy-to-cut pouch capable of easily forming a linear opening at opening by using commonly used sealant resin.SOLUTION: Laminates are obtained by laminating at least a sealant layer and a stretched film. The laminates are used in the front and back of the pouch, and ends thereof are heat-sealed after overlapped with each other so that the stretched films are arranged outside, and thereby the pouch is formed. Opening start parts are disposed at both ends of the pouch in a stretch direction of the stretched film. The sealant layer has at least one layer into which linear low-density polyethylene containing 4C α-olefin in a side chain, which is expressed by a C4-LLDPE, and a cyclic olefin copolymer which is expressed by a COC is blended.

Description

  The present invention relates to a refill container for storing toiletries such as powder detergents, liquid detergents and softeners, and foods such as edible oil, instant coffee, powdered milk and tea. More specifically, the present invention relates to an easy-cut pouch capable of easily forming a linear opening when opened.

Toiletries such as liquid detergents and shampoos, and foods such as edible oils, seasonings, and instant coffee are each stored in dedicated containers that are easy to use.
The dedicated container has a solid structure and is therefore expensive, so a product with a refill container that refills only the contents is sold separately so that it can be used repeatedly when the contents are gone. There are many.

  For example, liquid detergent containers need to be weighed and taken out each time they are used, so a rigid plastic container with a nozzle at the spout is repeatedly used to make it easier to pour into a measuring cup. Used as a container. In contrast to this container, as a refilling container for replenishing the contents, a flexible container made of a flexible packaging film, a container in which a spout is formed, or a container attached with a stopper is generally used. ing.

Refill containers have not always been given sufficient consideration to the convenience of refilling operations because the emphasis was placed solely on manufacturing inexpensively. For example, in the case of a conventional pouch, the distance that can be opened cleanly at the opening that has not been specially processed to guide the opening line is about 3 cm at the longest. In many cases, the opening does not become a straight opening that is easy to discharge the contents by moving away from the front and back of the pouch.
Therefore, in the case of a dimension that requires a long distance to be cut in a normal pouch, auxiliary processing has been performed such as inducing a cut line by scratching or laser processing the front and back packaging materials.
In addition, various methods have been used in which the film itself as a packaging material is given a tearing direction by means of stretching or the like to make it easy to open in only one direction.

  To solve this problem, Patent Document 1 discloses a biaxial film having a thickness of 8 to 20 μm in which an inorganic substance is deposited under reduced pressure in order to provide a packaging material having excellent hand cutting properties and moisture resistance when opened. An oriented polyethylene terephthalate film, and a biaxially oriented polyethylene terephthalate film having a thickness of 8 to 20 μm laminated on the inorganic material-coated surface side of the film, and directly or bonded to the non-mineral material-coated surface side of the film A refillable container composed of an easily tearable moisture-proof packaging material using a laminated film including a heat-sealable film mainly composed of polyethylene having a film thickness of 15 to 60 μm laminated through layers has been proposed.

  In Patent Document 2, an easy-open packaging bag that can be easily opened with a finger from a desired position, prevents bag breakage in the packaging process and distribution stage, is excellent in hygiene, and has a good appearance. In an airtight packaging bag in which a plastic film is heat-sealed, an easily openable packaging bag is formed by providing a notch with a length of 0.01 mm or more and less than 0.5 mm at the edge of the heat-sealing part. Has been proposed.

However, the refill container described in Patent Document 1 realizes the difference in tearing resistance depending on the tearing direction at the time of opening mainly by the difference in stretching of the polyethylene terephthalate film that uses it, enabling linear opening. No consideration is given to the direction of tearing and cutting of the sealant film.
An inorganic filler or the like is often used as an additive for imparting tearability to the sealant film. In this case, since the film strength and the adhesive strength are inferior to those of a normal sealant film, the content of a weight of about 800 g or more is particularly required. Not suitable for packaging.
In addition, as a resin added to the sealant layer polyethylene for the same purpose, a cyclic olefin copolymer (COC) obtained by copolymerizing norbornene and ethylene with a metallocene catalyst may be mentioned, but simply by adding it to the sealant layer resin. The problem was not solved because it was inferior in strength to a normal sealant film.

  In addition, the easy-open packaging bag proposed in Patent Document 2 is opened immediately after opening from a notch (notch) such as an I notch, V notch, U notch, etc., which has been used as a trigger for opening. From the front and back of the pouch, there is a problem that the position of the opening line is bifurcated, and it is easy to be cut off in the state of being bifurcated until the end, so that a linear opening cannot be formed.

JP-A-8-336940 JP 2002-128097 A

  In view of the above circumstances, an object of the present invention is to provide an easily cut pouch capable of easily forming a linear opening at the time of opening using a sealant resin that is generally used. To do.

As a sealant layer with excellent tearability and cutability, it is easy to cut by adopting a multilayer structure with an intermediate layer containing COC, which is a material excellent in tearability and cutting direction, between the laminate layer and the seal layer. In addition, a sealant layer that does not impair the physical properties of sealing properties and laminating properties was obtained. Further, by adding C6 or C8 LLDPE which reinforces the flexibility in order to increase the impact resistance at the time of dropping, a sealant layer having a strengthened physical property surface while maintaining the linearity and easy opening of the cut was obtained.
In addition, the opening and cutting operations can be facilitated by making the notches that trigger the opening and cutting of the pouch into a plurality of notches made up of a plurality of single-shaped flaws.

That is, the invention according to claim 1 of the present invention is
A pouch formed by heat-sealing the overlapped end portion of a stretched film that is formed by laminating a stretched film on the front and back using a laminate comprising at least a sealant layer and a stretched film. Opening start portions are provided at both ends of the pouch, and the sealant layer is a layer in which linear low density polyethylene (C4-LLDPE) having a C4 α-olefin in the side chain and a cyclic olefin copolymer (COC) are blended. An easy-cut pouch comprising at least one layer.

Easy opening and straight-line cutting properties are maintained when opening and opening in the stretching direction of the stretched film by providing opening opening portions at both ends of the pouch in the stretching direction of the stretched film of the laminate constituting the pouch. However, even in this case, the sealant layer may be stretched and remain in the shape of a beard in the vicinity of the cut line, and the linear cut property may not be ensured.
It is known that COC can be used for the sealant layer to achieve straight cut without a beard-like cut section, but COC alone has low sealing strength, especially when used for heavy-weight packaging. There was a shortage.
In the pouch of the present invention, C4-LLDPE, which is usually used for a sealant, can be mixed with COC and used to satisfy the linear cut property and the required seal strength.

The invention according to claim 2 of the present invention is
The easy-cut pouch according to claim 1, wherein the sealant layer comprises C4-LLDPE as an inner laminate layer, C4-LLDPE and COC as an intermediate layer, and C4-LLDPE as an outer seal layer.
When C4-LLDPE used for normal sealant is mixed with COC as the sealant layer, C4-LLDPE is used as the inner laminate layer, C4-LLDPE and COC as the intermediate layer, and C4-LLDPE as the outer seal layer. This makes it possible to satisfy both the necessary sealing strength and at the same time achieve both linear cutting properties.

The invention according to claim 3 of the present invention is
The easy-cut pouch according to claim 1 or 2, wherein the amount of COC contained in the intermediate layer is in the range of 10 wt% to 40 wt%.

  If the amount of COC contained in the intermediate layer is less than 10% by weight, the bag is difficult to break when opened, and if it exceeds 40% by weight, delamination between adjacent layers is likely to occur. Thus, it has become possible to achieve both the necessary seal strength and the linear straight line cut performance more reliably.

The invention according to claim 4 of the present invention is
The layer ratio of the laminate layer / intermediate layer / seal layer contained in the sealant layer is in the range of 0.5 to 2/1 to 5 / 0.5 to 2, respectively. Or an easy-cut pouch according to claim 1.

  Originally, as the thickness of the intermediate layer contained in the sealant layer occupies a larger portion in the thickness of the sealant layer, the cut property is improved and the bag can be easily cut at the time of opening. The strength decreases. By setting the layer ratio of the laminate layer / intermediate layer / seal layer within this range, it becomes possible to more surely achieve both the required seal strength and the linear straight-line cut property.

The invention according to claim 5 of the present invention is
Linear low density polyethylene (C6-LLDPE) having an α-olefin having 6 carbon atoms in the side chain, or an α-olefin having 8 carbon atoms in the side chain in each of the laminate layer / intermediate layer / sealing layer included in the sealant layer The linear low density polyethylene (C8-LLDPE) is blended, and the blending ratio is C4-LLDPE 70% to 90% for the laminate layer and the seal layer + C6-LLDPE 10% to 30%, and the intermediate layer is C4-LLDPE30. % -50% + C6-LLDPE 10% -30% + COC 10% -20%
Alternatively, C4-LLDPE 70% to 90% + C8-LLDPE 10% to 30% for the laminate layer and seal layer, and C4-LLDPE 30% to 50% + C8-LLDPE 10% to 30% + COC 10% to 20% for the intermediate layer The easy-cut pouch according to any one of claims 1 to 4, wherein the pouch is easy to cut.

LLDPE having an α-olefin in the side chain differs in flexibility depending on the carbon number of the α-olefin, and C6 and C8 are more flexible in LLDPE than in C4 (C4).
By blending LLDPE having C6 and C8 α-olefins in the side chain into each layer of the sealant layer, it is possible to improve the drop strength, which is a particularly problematic property when packaging heavy objects.

The invention according to claim 6 of the present invention is
6. A plurality of one-letter-shaped scratches are provided at unsealing start portions provided at both ends of the pouch, and a plurality of notches are formed. The easy-cut pouch described in 1.

Even if the position that triggers opening is slightly shifted by opening from multiple notches due to multiple single-letter-shaped scratches, opening can be started easily and effective opening is effective. And
Using a stretched film that is torn linearly in the stretching direction and a laminate that uses polyethylene that can be torn linearly, create a wide pouch that requires an opening of, for example, 10 cm to 50 cm, and both ends of the pouch By providing a large number of notches that protrude from the seal part to the inside at the opening position of the seal part, not only can the opening be performed smoothly, but also the position that protrudes from the seal is notched. Therefore, cutting can be performed smoothly.

The invention according to claim 7 of the present invention is
7. The easy cut according to claim 1, wherein the plurality of notches are arranged in a region having a width of 10 mm or more at a position protruding 0.5 mm or more from the seal portion at both ends of the pouch. It is a sex pouch.

  By arranging a large number of notches in a region with a width of 10 mm or more that protrudes 0.5 mm or more from the seal part at both ends of the pouch, it is possible not only to easily start opening, but also to neatly align the front and back of the pouch. It is also possible to make it easier to cut the end of opening when it is not cut and split into two.

The invention according to claim 8 of the present invention is
The easy-cut pouch according to any one of claims 1 to 7, wherein the length of each of the single-shaped flaws constituting the multiple array of notches is in the range of 0.1 mm to 5 mm. It is.

  By setting the length of each single-shaped flaw constituting the notch within the above range, it becomes easy to maintain the linearity immediately after the start of cutting at the time of opening.

As described above, according to the easy-cut pouch of the present invention,
As an additive for tearing the sealant film, the addition of an inorganic filler or resin such as COC to the sealant layer polyethylene alone is inferior in strength to that of a normal sealant film. Using a commonly used sealant resin to solve the problem that the position is bifurcated and it is easy to be cut off with the bifurcated position to the end, making it impossible to form a linear opening. Thus, it is possible to provide an easy-cut pouch capable of easily forming a linear opening at the time of opening.

In particular, the structure of the sealant layer for the standing pouch application of the present invention is a laminate layer, an intermediate layer, and a seal layer, which are generally used in C4-LLDPE and COC. It has become possible to provide a sealant film that does not impair the physical properties of cut and seal strength.

Furthermore, by combining the sealant layer with easy-cut PET such as a stretched polyester film, it is possible to provide a pouch that requires easy-opening and linearity of opening.
Furthermore, by further incorporating C6 or C8 LLDPE in order to increase the impact resistance of the pouch, it is possible to provide an impact-resistant pouch capable of packaging heavy objects while maintaining easy opening and linearity of opening. did.

1 is a schematic plan view of an example of an easy-cut pouch according to the present invention. (A) Standing pouch, (B) Three-way pouch, (C) Gazette bag. The cross-sectional schematic of the laminated body used for the easy-cut pouch of this invention. (A) Laminate, (B) Sealant layer. The front schematic of the other example of the easy-cut pouch of this invention. (A) Standing pouch, (B) Notch partial enlarged view of multiple arrays.

Next, an example of an embodiment of the easy-cut pouch of the present invention will be described with reference to the drawings.
FIG. 1 shows a schematic plan view of an example of the easy-cut pouch of the present invention. FIG. 1A shows a case of a standing pouch. As an example of another type of pouch, FIG. 1B shows a schematic plan view of a three-way pouch, and FIG. 1C shows a schematic appearance of a gusset bag.
The present invention can be applied to various other types of pouches. Here, a case of a standing pouch will be mainly described as an example.

  FIG. 2 is a schematic cross-sectional view of a laminate used in the easy-cut pouch of the present invention. FIG. 2A shows a cross section of the laminate having the top surface outside the pouch, and FIG. 2B shows a cross section of the sealant layer constituting the laminate.

The easy-cut pouch according to the present invention has an end in which a stretched film (5) is arranged on the outside using a laminate (1) formed by laminating at least a sealant layer (6) and a stretched film (5). This is a pouch formed by heat-sealing the part.
The heat-sealed end portion comprises a bottom seal portion (4) and left and right side seal portions (2). The bottom seal portion (4) is a bottom tape folded back at a height (f) from the bottom end surface (see FIG. (Not shown). The top of the pouch will be heat sealed after filling the contents and is not sealed at this stage.

Notches (12) are provided as opening start portions at both ends of the pouch in the stretching direction (in this case, the left-right direction) of the stretched film (5). The shape of the notch may be a notch such as an I notch, a V notch, a U notch or the like, but a multiple array of notches (13) as shown in FIG. 3 is more desirable.
In this case, the protruding length (a) of the multi-array notch is a position protruding 0.5 mm or more from the side seal portions (2) at both ends of the pouch, and the vertical width (b) of the multi-array notch region is 10 mm or more in width. One notch length (c) is preferably in the range of 0.1 mm to 5 mm in order to ensure easy cutability.
The arrangement direction of the individual single-letter marks constituting the multiple arrangement notch is not limited to the direction parallel to the opening direction, and may be arranged in a staggered pattern, for example.

  The pouch as described above can be produced by a known method. For example, using a laminate composed of a stretched polyethylene terephthalate (PET) film with a thickness of 12 μm / urethane adhesive layer / an easily cut sealant layer with a thickness of 60 μm, and sandwiching both side edges of the bag and the bottom tape in the usual manner 1 to create a standing pouch having the shape shown in FIG. 1A. Next, in the vicinity of the side heat seal portion of the standing pouch, the edge of the pouch is directed inward from the edge of the pouch. On the other hand, it can be created by forming a large number of notches by providing straight cuts substantially perpendicularly.

Examples of the stretched film (1) used in the easy-cut pouch of the present invention include polyester resins such as polyethylene terephthalate resin (PET), polyethylene naphthalate resin (PEN), and polybutylene terephthalate resin (PBT). Polyamide resin (PA) such as nylon-6, nylon-66, polycarbonate resin (PC), polyacrylonitrile resin (PAN), polyimide resin (PI), polyvinyl alcohol resin (PVA), polyvinylidene chloride resin (PVDC), Any of stretched films such as ethylene-vinyl alcohol copolymer resin (EVOH) can be used. In addition, the thickness of the stretched film is usually appropriately selected within a range of 10 to 150 μm in consideration of processability.
The film may be stretched either biaxially or uniaxially, but in order to obtain easy cutability in the direction required at the time of opening, the degree of stretching in the opening direction needs to be greater than the degree of stretching in the perpendicular direction. It is.

  Examples of the sealant layer (6) include a low density polyethylene resin (LDPE), a medium density polyethylene resin (MDPE), a high density polyethylene resin (HDPE), a linear low density polyethylene resin (L-LDPE), and a polypropylene resin ( PP), ethylene-propylene copolymer (EP), ethylene-α olefin copolymer, ethylene-acrylic acid copolymer (EAA), ethylene-methacrylic acid copolymer (EMAA), ethylene-methyl acrylate copolymer Resin such as coalescence (EMA), ethylene-ethyl acrylate copolymer (EEA), ethylene-methyl methacrylate copolymer (EMMA), ionomer resin, ethylene-vinyl acetate copolymer (EVA), or these resins Can be used. Usually, LLDPE is often used because of its sealability.

  As the LLDPE, linear low density polyethylene (C4-LLDPE) having an α-olefin having 4 carbon atoms in the side chain is usually used. In the case of heavy-weight packaging, LLDPE is more flexible when the number of carbons is 6 (C6) and 8 (C8) than 4 (C4). In order to improve the drop strength, which is a particularly problematic property, LLDPE having C6 and C8 α-olefins in the side chain may be blended in each layer of the sealant layer (6).

The sealant layer (6) of the laminate (1) used in the easy-cut pouch of the present invention is not a single layer, but a laminate layer (9) and an intermediate layer in order from the outside of the container as shown in the cross section of FIG. (10) It consists of at least three layers of a seal layer (11).
The intermediate layer (10) plays a major role in expressing the easy-cut property of the sealant layer (6), and the laminate strength with the adhesive layer (8) that may be insufficient only with the intermediate layer (10) The seal strength between the sealant layers at the time of heat sealing is reinforced by the laminate layer (9) and the seal layer (10).
The intermediate layer (10) is a layer comprising an intermediate layer in which C4-LLDPE is blended with a cyclic olefin copolymer (COC) excellent in easy cutting properties, and maintains the linear straight-cut property when the sealant layer is opened. By including COC that contributes, it has the function of preventing the occurrence of whiskers and the like at the time of opening.

The amount of COC contained in the intermediate layer is in the range of 10% to 40% by weight in order to prevent the bag from becoming difficult to break at the time of opening and to prevent delamination from adjacent layers. It is desirable.
Although the total thickness of the sealant layer (6) is not particularly limited, it is usually about 30 μm to 150 μm, preferably about 60 μm to 80 μm, and the tear strength is 1 to 10 g from the viewpoints of sealability, productivity, cost, and the like.
The layer ratio of the laminate layer (9) / intermediate layer (10) / seal layer (11) contained in the sealant layer (6) is in the range of 0.5-2 / 1-5 / 0.5-2, respectively. It is desirable to be. As a typical configuration of the sealant layer in the total thickness range of 60 μm to 80 μm, examples shown in Table 1 can be shown.

  In the case of adding C6 or C8 LLDPE in addition to C4 for the purpose of enhancing the flexibility of the sealant film in each layer of the sealant layer (6), the blending ratio of the laminate layer (9) For the sealing layer (11), C4-LLDPE 70% to 90% + C6-LLDPE 10% to 30%, and for the intermediate layer (10), C4-LLDPE 30% to 50% + C6-LLDPE 10% to 30% + COC 10% to 20%, or C4-LLDPE 70% -90% + C8-LLDPE 10% -30% for laminate layer (9) and seal layer (11), C4-LLDPE 30% for intermediate layer (10) It is desirable that it is ˜50% + C8−LLDPE 10% ˜30% + COC 10% ˜20%.

As a method for producing the laminate (1) by laminating the stretched film (5) and the sealant layer (6) through the adhesive layer (8), for example, a known method such as a dry lamination method is used. can do.
As the adhesive used in the dry lamination method, generally, an adhesive for laminating such as polyurethane, polyacrylic, polyester, epoxy, polyvinyl acetate, cellulose, or the like can be used.

The easy-cut pouch of the present invention is provided with opening start portions (notches) at both ends of the pouch in the stretching direction of the stretched film (5) constituting the pouch. The shape of the notch is usually an acute notch (12) (see FIG. 1) provided from the side seal portion (2) with the tip facing inward. Multiple arrays of notches (13) can be provided as shown in FIG.
The multiple array of notches (13) are provided in a region near the opening on both sides of the pouch in the opening direction, and are, for example, a collection of a plurality of single-letter-shaped scratches as shown in FIG.

FIG. 3A is a schematic front view of an example of the standing pouch of the easy-cut pouch of the present invention, and FIG. 3B is an enlarged view of notches in a multi-array. Multiple notches (13) are provided in the vicinity of the side seals (2) on both sides of the upper part of the pouch.
The multiple array of notches (13) are provided not only on the side seal portion (2) but also in the region protruding inward from the side seal portion (2), and the protrusion length (a) of the multiple array notches in this case is the side surface of the pouch at both ends. It is a position protruding 0.5 mm or more from the seal part (2), the multi-array notch region vertical width (b) is 10 mm or more, and one notch length (c) is in the range of 0.1 mm to 5 mm. .

A plurality of one-letter-shaped scratches constituting a plurality of notches can be provided by a known method such as pressing with a metal blade or laser processing.
If the length of a single notch, i.e., a single-shaped flaw, exceeds 5 mm, the heat seal is used to ensure the durability of the heat seal at the location where such multiple array notches are provided and to prevent the penetration of the contents. It is necessary to widen the width of the portion, and the appearance of the multi-array notch is also deteriorated, and the roughness of the processed portion is large, so that the bag may be broken from the easy-open processing portion in the packaging process or the distribution stage. On the other hand, providing a scratch of less than 0.1 mm exceeds the mechanical processing limit of the blade, and it is difficult to manage the processing accuracy.

<Example 1>
A pouch having a shape shown in FIG. 1A and having a width (d) of 250 mm, a height (e) of 160 mm, and a bottom folded height (f) of 50 mm was prepared.
The laminate of the front and back constituting the pouch was composed of an easily cut stretched PET film (12 μm) / printing layer / adhesive layer / easy cut sealant layer (60 μm).
The easy-cut sealant layer was composed of a laminate layer (C4-LLDPE) (20 μm) / intermediate layer (C4 + COC 25%) (20 μm) / seal layer (C4-LLDPE) (20 μm).

A pouch was prepared using the above laminate and the following tests were performed.
1. 1. Tear strength in the direction perpendicular to the stretch direction (MD) stretch direction of the easy-cut sealant layer (TD) 2. Displacement of the cut end surface of the front and back laminate when the pouch is opened and torn (front and back tearing displacement) 3. Tear strength in MD and TD direction when the pouch is opened and torn Number of bag breaks when 900 ml of water is sealed in a pouch and dropped from a height of 1 m (drop strength n = 6)
The results are shown in Tables 2 and 3.

<Example 2>
A pouch was prepared and tested in the same manner as in Example 1 except that 25% by weight of C6-LLDPE was added to the blend of the intermediate layer of the easy-cut sealant layer.
The results are shown in Tables 2 and 3.

<Example 3>
A pouch was prepared and tested in the same manner as in Example 1 except that 25% by weight of C8-LLDPE was added to the composition of the intermediate layer of the easy-cut sealant layer.
The results are shown in Tables 2 and 3.

<Comparative Example 1>
A pouch was prepared and tested in the same manner as in Example 1 except that the easy-cut stretched PET film was replaced with a PET film and the easy-cut sealant layer was C4-LLDPE.
The results are shown in Tables 2 and 3.

<Comparative example 2>
A pouch was prepared and tested in the same manner as in Example 1 except that the easy-cut sealant layer was C4-LLDPE.
The results are shown in Tables 2 and 3.

<Comparative Example 3>
A pouch was prepared and tested in the same manner as in Example 1 except that the easy-cut stretched PET film was replaced with a PET film.
The results are shown in Tables 2 and 3.

From the above results, it can be seen that the easy-cut sealant used in the configuration of the present invention is superior in linear cut property and tear strength than the C4-LLDPE layer generally used as a sealant.
Moreover, when this easy-cut sealant and the easy-cut stretched PET film were combined in the same cut direction and opened as a package, it was found that the effects of straight-cut property and easy-cut property were enhanced.
Moreover, it turned out that the intensity | strength with respect to an impact is higher in the case of Example 2, 3 which added C6 or C8 rather than the case where LLDPE of Example 1 is only C4 from the result of drop strength.

<Example 4>
A pouch having the shape shown in FIG. 3A and having a width (d) of 250 mm, a height (e) of 160 mm, and a bottom folded height (f) of 50 mm was produced.
The laminate of the front and back constituting the pouch was composed of an easily cut stretched PET film (12 μm) / printing layer / adhesive layer / easy cut sealant layer (60 μm).
The easy-cut sealant layer was composed of a laminate layer (C4-LLDPE) (20 μm) / intermediate layer (C4 + COC 25%) (20 μm) / seal layer (C4-LLDPE) (20 μm).

A pouch was made using the above laminate, and a large number of notches in which single-shaped scratches having a length of 1 mm were arranged in a staggered pattern were processed. The pouch thus obtained was filled with household powder detergent and the opening was heat sealed.
The processing positions of the multiple arrays of notches are the following 6 types of shapes when the dimension protruding inward from the side seal part of the pouch is a (mm) and the vertical width of the array area is b (mm). A tear evaluation was performed using a pouch. The evaluation item was the number of people caught in the cut at the time of opening (out of 10 people), and the results are shown in Table 4.
Shape 1: a = 0mm, b = 15mm
Shape 2: a = 0.3mm, b = 15mm
Shape 3: a = 0.5mm, b = 15mm
Shape 4: a = 3mm, b = 3mm
Shape 5: a = 3 mm, b = 8 mm
Shape 6: a = 3 mm, b = 10 mm

  As a result, in order to express the easy-cut property of the easy-cut pouch of the present invention, the processing positions of the multiple array of notches have a dimension that protrudes inward from the side seal portion of the pouch and the region of the array. It was found that the vertical width should be 10 mm or more.

  The container of the present invention can be widely used as a container for applications requiring refilling in addition to toiletries, liquid detergents, softeners, hand soaps, and the like.

a ... multiple array notch protrusion length b ... multiple array notch region vertical width c ... one notch length d ... pouch width e ... pouch height f ... bottom folding height 1 ... laminated body 2 ... side seal part 3 ... bottom part Bending line 4 ... bottom seal part 5 ... stretched film 6 ... sealant layer 7 ... printing ink layer 8 ... adhesive layer 9 ... laminate layer 10 ... intermediate layer 11 ... seal layer 12 ... notch 13 ... notch of multiple arrangement

Claims (8)

  A pouch formed by heat-sealing the overlapped end portion of a stretched film that is formed by laminating a stretched film on the front and back using a laminate comprising at least a sealant layer and a stretched film. Opening start portions are provided at both ends of the pouch, and the sealant layer includes a linear low density polyethylene having a side chain of an α-olefin having 4 carbon atoms represented by C4-LLDPE and a cyclic olefin copolymer represented by COC. An easy-cut pouch comprising at least one blended layer. The easy-cut pouch according to claim 1, wherein the sealant layer comprises C4-LLDPE as an inner laminate layer, C4-LLDPE and COC as an intermediate layer, and C4-LLDPE as an outer seal layer.   The easy-cut pouch according to claim 1 or 2, wherein the amount of COC contained in the intermediate layer is in the range of 10 wt% to 40 wt%.   The layer ratio of the laminate layer / intermediate layer / seal layer contained in the sealant layer is in the range of 0.5 to 2/1 to 5 / 0.5 to 2, respectively. 2. An easy-cut pouch according to claim 1. The number of carbon atoms represented by linear low density polyethylene or C8-LLDPE having a side chain of an α-olefin having 6 carbon atoms represented by C6-LLDPE in each layer of the laminate layer / intermediate layer / sealing layer contained in the sealant layer 8 linear α-olefin having α-olefin in the side chain is blended, and the blending ratio is C4-LLDPE 70% -90% + C6-LLDPE 10% -30% in the laminate layer and seal layer, in the intermediate layer Is C4-LLDPE 30% -50% + C6-LLDPE 10% -30% + COC 10% -20%
Alternatively, C4-LLDPE 70% to 90% + C8-LLDPE 10% to 30% for the laminate layer and seal layer, and C4-LLDPE 30% to 50% + C8-LLDPE 10% to 30% + COC 10% to 20% for the intermediate layer The easy-cut pouch according to any one of claims 1 to 4, wherein the pouch is easy to cut.   6. A plurality of one-letter-shaped scratches are provided at unsealing start portions provided at both ends of the pouch, and a plurality of notches are formed. The easy-cut pouch described in 1.   7. The easy cut according to claim 1, wherein the plurality of notches are arranged in a region having a width of 10 mm or more at a position protruding 0.5 mm or more from the seal portion at both ends of the pouch. Sex pouch.   The easy-cut pouch according to any one of claims 1 to 7, wherein the length of each of the single-shaped flaws constituting the multiple array of notches is in the range of 0.1 mm to 5 mm. .

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