Packaging bag

Abstract

To provide a packaging bag which allows odor of a content to be easily confirmed even without opening the packaging bag.SOLUTION: A packaging bag formed from a laminate 10 having a sealant layer 11 and an aroma retention layer 12, wherein the laminate 10 has a half-cut part 13 penetrating the aroma retention layer 12, the half-cut part 13 reaches an outer surface 14 of the laminate 10, and the half-cut part 13 reaches the sealant layer 11 inside the aroma retention layer 12.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a packaging bag. [Background technology]

[0002] As the material for the packaging bag, a synthetic resin film such as a polyamide film, a polyester film, a polypropylene film, etc. For example, Patent Document 1 describes a packaging bag for refills. This type of packaging bag has a half-cut line formed to make it easier to open the spout. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2013-39932 A Summary of the Invention [Problem to be solved by the invention]

[0004] In some cases, detergents, fabric softeners, and other contents contain fragrances to impart a fragrance. In this case, a fragrance-retaining layer is laminated on the packaging bag to provide a barrier to prevent the odor of the contents from escaping to the outside. Since it is not possible to confirm the odor of the contents without opening a packaging bag with a fragrance-retaining layer, there are difficulties in finding a method to provide a sample of the odor of the contents.

[0005] The present invention has been made in consideration of the above circumstances, and has an object to provide a packaging bag that allows the odor of the contents to be easily confirmed even without opening the packaging bag. [Means for solving the problem]

[0006] The first aspect is a packaging bag formed from a laminate having a sealant layer and an aroma-retaining layer, the laminate having a half-cut portion that penetrates the aroma-retaining layer, the half-cut portion reaching the outer surface of the laminate and reaching the sealant layer inside the aroma-retaining layer. In a second aspect, in the first aspect, the packaging bag has a sealed portion on the periphery of the laminate, and the half-cut portion is disposed at a position 5 mm or more away from the sealed portion.

[0007] In a third aspect, in the first or second aspect, the packaging bag has a self-supporting bottom and a predetermined filling amount for liquid contents, and the laminate has a liquid-contacting region where the inner surface of the laminate comes into contact with the contents when the packaging bag is made to stand on its own while filled with the contents, and a non-liquid-contacting region where the inner surface of the laminate comes into contact with the gas above the contents, and the half-cut portion is positioned in the non-liquid-contacting region. A fourth aspect is any one of the first to third aspects, wherein the half-cut portions are formed in a non-intersecting shape in a plan view of the laminate.

[0008] A fifth aspect is any one of the first to fourth aspects, wherein the packaging bag has a storage section for the contents and an outlet for the contents, the storage section and the outlet are integrally formed from the laminate, and the half-cut section is formed in a location different from the outlet. In a sixth aspect, in any one of the first to fifth aspects, the half-cut portion is an odor releasing portion that makes it possible to confirm the odor of the contents filled in the packaging bag without opening the packaging bag. Effect of the Invention

[0009] According to the present invention, it is possible to provide a packaging bag that allows the odor of the contents to be easily confirmed even without opening the packaging bag. [Brief description of the drawings]

[0010] [Figure 1] FIG. 2 is a cross-sectional view showing a first example of a laminate. [Diagram 2] FIG. 4 is a cross-sectional view showing a second example of the laminate. [Diagram 3] FIG. 2 is a front view illustrating a packaging bag according to an embodiment. [Figure 4]FIG. 4 is a partially enlarged front view showing a first example of a planar shape of a half-cut portion. [Diagram 5] FIG. 11 is a partially enlarged front view showing a second example of the planar shape of the half cut portion. [Figure 6] FIG. 11 is a partially enlarged front view showing a third example of a planar shape of the half cut portion. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, the present invention will be described based on preferred embodiments.

[0012] Fig. 1 shows a first example of a laminate that can be used in the packaging bag of the embodiment. The laminate 10 shown in Fig. 1 has a sealant layer 11 and an aroma retaining layer 12. The sealant layer 11 is the innermost layer of the packaging bag and is used to seal the packaging bag. The aroma retaining layer 12 is laminated on the outside of the sealant layer 11 and is a layer that retains or provides a barrier against the odor of the contents.

[0013] The laminate 10 has a half-cut portion 13 penetrating the aroma-retaining layer 12. On the outside of the aroma-retaining layer 12, the half-cut portion 13 reaches the outer surface 14 of the laminate 10. On the inside of the aroma-retaining layer 12, the half-cut portion 13 reaches the sealant layer 11.

[0014] The sealant layer 11 is not particularly limited as long as it is a sealant material capable of sealing by heat welding or the like, and examples thereof include polyolefin resins such as polyethylene resins and polypropylene resins. The polyolefin resins may contain resins derived from fossil resources such as petroleum, may contain resins derived from biomass such as plants, or may contain resins obtained by recycling. The sealant material may be one type or two or more types.

[0015] When a polyethylene-based resin is used for the sealant layer 11, examples of the resin include low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), ethylene-vinyl acetate copolymer (EVA), etc. Amorphous resin, acid-modified resin, etc. may be used as at least a part of the sealant material.

[0016] The sealant layer 11 may be a single layer or a multilayer. The multilayer sealant layer 11 may have an XY-type laminate structure in which the inner layer and the outer layer are made of different materials, an XYX-type laminate structure in which the middle layer and the layers on both sides are made of different materials, or an XYZ-type laminate structure in which the inner, middle, and outer layers are made of different materials. The number of layers in the multilayer is not particularly limited, and examples include 2 layers, 3 layers, 4 layers, and 5 layers.

[0017] The aroma-retaining layer 12 may be made of any material having a higher aroma-retaining property than the sealant layer 11, and examples of such materials include polyester resins such as polyethylene terephthalate (PET), polyamide resins such as nylon (Ny), ethylene-vinyl alcohol copolymers (EVOH), metal vapor deposition layers such as aluminum, metal foils such as aluminum foil, and inorganic vapor deposition layers such as silica and alumina.

[0018] The laminate 10 may have two or more layers or two or more kinds of aroma retaining layers 12. For example, it may be a deposition film in which a deposition layer such as a metal deposition layer or an inorganic deposition layer is laminated on a base film made of a stretched resin film such as a polyester resin, a polyamide resin, or a polypropylene resin. The aroma retaining layer 12 may be a film in which a metal foil is laminated on the above-mentioned base film, or a coated film in which a barrier resin such as EVOH is applied to the above-mentioned base film.

[0019] The half-cut portion 13 has a concave void formed by penetrating the aroma-retaining layer 12. This forms an odor release portion through which the odor components of the contents can locally permeate. By using the odor release portion, it becomes possible to confirm the odor of the contents filled in the packaging bag through the half-cut portion 13 without opening the packaging bag. The concave void may be, but is not limited to, a groove or a hole.

[0020] Since the half-cut portion 13 is formed between the outer surface 14 of the laminate 10 and the sealant layer 11, the odor components that have permeated the sealant layer 11 in the thickness direction are released to the outside of the laminate 10. The half-cut portion 13 may only contact the outer surface of the sealant layer 11, or may penetrate a portion of the sealant layer 11 in the thickness direction. Although not particularly shown, another layer may be interposed between the sealant layer 11 and the aroma-retaining layer 12, or the sealant layer 11 and the aroma-retaining layer 12 may be in direct contact with each other.

[0021] As in the laminate 10 shown in Fig. 1, the aroma retaining layer 12 may be the outermost layer of the laminate 10. As in the laminate 10A shown in Fig. 2, another layer may be laminated on the outside of the aroma retaining layer 12. In this case, the half-cut portion 13 may be formed so as to penetrate the surface layer 15 laminated on the outside of the aroma retaining layer 12.

[0022] The surface layer 15 is not particularly limited, but examples thereof include polyolefin resins such as polyethylene resins and polypropylene resins, polyester resins such as PET, and polyamide resins such as Ny. The surface layer 15 may include a design layer such as a printed layer. The surface layer 15 may be a coating layer formed on the surface of the aroma retaining layer 12 or another layer.

[0023] The layer structure of the laminate having the half-cut portion 13 is not particularly limited, and may be a mono-material laminate in which 80% by weight or more, 90% by weight or more, or 95% by weight or more are composed of a specific resin group. As the specific resin group in the mono-material laminate, one or more types belonging to polyethylene resins may be selected, one or more types belonging to polypropylene resins may be selected, or one or more types belonging to polyolefin resins may be selected.

[0024] When the laminate having the half-cut portion 13 is not a mono-material, it may be a composite material made of two or more resin groups, such as polyolefin resin, polyester resin, polyamide resin, etc.

[0025] The cross-sectional shape of the half-cut portion 13 is not particularly limited, but may be a shape in which the width increases from the inside to the outside of the laminate 10, or a shape in which the width decreases from the inside to the outside of the laminate 10, or the width may be approximately constant in the thickness direction of the laminate 10.

[0026] The method for forming the half-cut portion 13 is not particularly limited, and examples thereof include mechanical processing using a blade or the like and laser processing. In the case of mechanical processing, cuts may be made in the laminate 10 from the outside to the inside of the laminate 10. The half-cut portion 13 may be formed in the aroma retaining layer 12 before being laminated on the sealant layer 11, and then the half-cut portion 13 may be laminated on the sealant layer 11. In the case where the laminate 10 includes a laser reflective layer such as a metal deposition layer or a metal foil, cuts may be made in the laser reflective layer by mechanical processing.

[0027] When laser processing is performed on the half-cut portion 13, the laser may be irradiated from the outside of the laminate 10, or may be irradiated from the inside of the laminate 10 so as to penetrate the sealant layer 11. The laminate 10 may include a laser absorbing layer, and the aroma retaining layer 12 may have laser absorptivity.

[0028] The packaging bag of the embodiment is formed from the laminate 10 having the above-mentioned half-cut portion 13. The step of forming the half-cut portion 13 may be performed before forming the packaging bag from the laminate 10, or may be performed after forming the packaging bag. The half-cut portion 13 may be formed in the laminate 10 or the packaging bag on a bag-making machine that forms the packaging bag from the laminate 10.

[0029] Specific examples of the packaging bag include a three-sided sealed bag, a four-sided sealed bag, a pillow bag, a gusset bag, a standing pouch, etc. When the packaging bag is composed of a plurality of members, at least one of the members is formed from the laminate 10 having the half-cut portion 13 described above.

[0030] The packaging bag 20 shown in FIG. 3 is a standing pouch formed of a pair of body members 21 and a bottom member 22 folded in half along a fold line 22a.

[0031] In the illustrated packaging bag 20, the front and rear body members 21 are joined above the fold line 22a by the left and right body seal portions 21a. The bottom member 22 is sandwiched between the front and rear body members 21 with the fold line 22a on the upper side. Below the fold line 22a, the bottom member 22 is joined to the body member 21 to form the bottom seal portion 22b.

[0032] At least one of the pair of body members 21 is formed from a laminated body 10 having a half-cut portion 13. When only one body member 21 is provided with a half-cut portion 13, the other body member 21 and the bottom member 22 may be formed from a laminated body 10 that does not have a half-cut portion 13.

[0033] The laminate 10 that does not have the half-cut portion 13 may be a laminate 10 that is the same in material, thickness, etc., except for the presence or absence of the half-cut portion 13. The laminate 10 may be a laminate 10 that is different in at least one of material, thickness, etc., in addition to the presence or absence of the half-cut portion 13.

[0034] The packaging bag 20 in the illustrated example has an upper seal portion 23 that closes the space between the front and rear body members 21 at the upper portion of the packaging bag 20. The left and right sides of the storage section 27 are sealed by the body seal portions 21a, 21b, and the top of the storage section 27 may be open when the contents C are filled into the storage section 27. In this case, after the contents C are filled, the filling opening at the top of the storage section 27 is sealed by the upper seal portion 23.

[0035] The packaging bag 20 in the illustrated example has a spout 24 for pouring out the contents C. The spout 24 has a flow path 25 formed from an unsealed portion between the body members 21 at the upper part of the packaging bag 20, and flow path forming seal portions 25a, 25b formed along the flow path 25 on both sides in the width direction of the flow path 25. Furthermore, the tip of the flow path 25 is sealed by a flow path sealing seal portion 25c formed from the sealed portion between the body members 21.

[0036] When opening the packaging bag 20, the body member 21 can be torn across the flow path 25 and the flow path forming seal portions 25a, 25b to open the flow path 25. For example, an opening start portion 26 such as a notch may be formed in at least one location of the flow path forming seal portions 25a, 25b or the flow path sealing seal portion 25c.

[0037] To facilitate tearing from opening initiation portion 26, it is preferable to provide a cut that penetrates body member 21 or a slit (not shown) that does not penetrate body member 21 at an appropriate position and shape. For example, opening initiation portion 26 may be provided above spout 24, and a cut may be provided in flow path forming seal portion 25a to form a tab.

[0038] When the flow path forming seal portion 25a has a tab (not shown), the tab may be made removable by, for example, breaking the flow path forming seal portion 25a downward from the opening start portion 26. Furthermore, by applying force using the tab as a knob, it is possible to easily tear the flow path 25 across the flow path 25 toward the flow path forming seal portion 25b.

[0039] The packaging bag 20 in the illustrated example has a storage section 27 that stores the contents C, and a bottom section 28 that can stand on its own by opening the bottom member 22. The storage section 27 and the spout 24 are integrally formed from the body member 21. When the packaging bag 20 is made to stand on its own with the bottom section 28 facing down, the storage section 27 is disposed on the bottom section 28, and the spout 24 is disposed above the storage section 27.

[0040] In the illustrated standing pouch, the periphery of body member 21 has seal portions such as body seal portions 21a, 21b, bottom seal portion 22b, top seal portion 23, flow path forming seal portions 25a, 25b, and flow path closing seal portion 25c.

[0041] The position, shape, etc. of the sealed portion can be set appropriately depending on the type of packaging bag. For example, in the case of a four-sided sealed bag, the sealed portions are arranged on the four sides of the periphery of the containing portion. In the case of a three-sided sealed bag, the sealed portions are arranged on three sides of the periphery of the containing portion, and the remaining side is formed by a fold line formed by folding the front and rear body members in half.

[0042] The odor release section 30 consisting of the half-cut section 13 is preferably located at a position 5 mm or more away from the sealed section. The distance between the front and rear body members 21 becomes short near the sealed section, which may hinder the movement of odor components. By locating the half-cut section 13 at a position far away from the sealed section, odor components are more easily released from the half-cut section 13.

[0043] The storage section 27 can be filled with any content within the capacity. Depending on the application of the packaging bag 20, the storage section 27 may have a predetermined filling amount for the liquid content C. In this case, a liquid-contacting area A and a non-liquid-contacting area B can be set according to the predetermined filling amount.

[0044] In the illustrated example, when the packaging bag 20 is made to stand on its own while being filled with the contents C, the body member 21 has a liquid-contact area A where the inner surface is in contact with the contents C, and a non-liquid-contact area B where the inner surface is in contact with the gas D above the contents C. It is preferable that the half-cut portion 13 is disposed in the non-liquid-contact area B of the body member 21, since this suppresses leakage of the contents C.

[0045] Depending on the thickness of the sealant layer 11 included in the body member 21, etc., it is also possible to place the half-cut portion 13 in the liquid-contacting region A. In the case of a packaging bag, such as a flat bag, where the liquid-contacting region and the non-liquid-contacting region can change depending on the posture and shape of the packaging bag, the half-cut portion 13 may be placed at a desired position in either the liquid-contacting region or the non-liquid-contacting region. Even if the packaging bag cannot stand on its own, if the posture of the packaging bag, etc. can be specified, it is also possible to select a position that will become the non-liquid-contacting region and place the half-cut portion 13 therein.

[0046] The half-cut portion 13 in the illustrated example is formed in a location different from the spout 24. When the half-cut portion 13 of the odor release portion 30 is disposed in a location away from the spout 24, the effect of the half-cut portion 13 can be suppressed when the spout 24 is opened.

[0047] In the plan view of the laminate 10, the planar shape of the half-cut portion 13 is not particularly limited, but may be a closed or open figure, and may be an intersecting or non-intersecting shape. Examples of the non-intersecting shape include dots and non-intersecting lines.

[0048] Examples of closed figures include circles, ellipses, polygons, etc. Examples of non-closed figures include straight lines, broken lines, T-shapes, X-shapes, etc. Examples of intersecting lines include broken lines, T-shapes, X-shapes, polygons, etc. Examples of non-intersecting lines include straight lines, arcs, etc. When a closed figure such as a circle is made to go around from the starting point to the end point in a full circle by laser processing, etc., the vicinity of the starting point may intersect with the vicinity of the end point. For this reason, in the case of dots or non-intersecting lines, it is preferable that the shape is an non-closed figure.

[0049] The half-cut portions 13 are preferably formed in a non-intersecting shape in a plan view of the laminate 10. For example, they may be linear half-cut portions 31a as in the odor emitting portion 31 shown in Fig. 4, curved half-cut portions 32a as in the odor emitting portion 32 shown in Fig. 5, or dotted half-cut portions 33a as in the odor emitting portion 33 shown in Fig. 6. A plurality of types of half-cut portions selected from linear, curved, dotted, etc. may be selected and combined into the same odor emitting portion.

[0050] The non-intersecting half-cut portions 13 make it difficult for the strength of the laminate 10 to decrease in the vicinity of the half-cut portions 13. For example, even if the laminate 10 is pressed in the thickness direction, damage to the half-cut portions 13 can be suppressed. The pressure in the thickness direction may be the weight of the contents acting from the inside to the outside, or an external force acting from the outside to the inside.

[0051] The non-intersecting half-cut portion 13 is preferably an aggregate of short linear or dot-like small portions. The length or diameter of the small portions in the plan view of the laminate 10 can be set appropriately, for example, in a range in which the upper and lower limits are selected from any two points among 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, etc. The interval between the small portions can be set appropriately, for example, in a range in which the upper and lower limits are selected from any two points among 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, etc.

[0052] In the example shown in Fig. 4, a plurality of linear half-cut portions 31a are arranged at intervals on a plane. The plurality of half-cut portions 31a may be parallel to each other, or may be perpendicular to each other. In the illustrated example, the plurality of small portions roughly form an unclosed quadrangle, but they may also be unclosed triangles, pentagons, hexagons, etc. The vertices of these polygons may have a shape in which non-intersecting small portions have intervals, or the sides of the polygons may have a shape in which non-intersecting small portions have intervals.

[0053] In the example shown in Fig. 5, a plurality of curved half-cut portions 32a are arranged at intervals on a plane. A plurality of half-cut portions 32a may be arranged on the same circumference, or a plurality of half-cut portions 32a may be arranged on concentric circumferences. In the illustrated example, a plurality of small portions roughly form an unclosed circle, but may also be an unclosed ellipse or the like. Examples of the curved half-cut portions 32a include an arc shape, a wave shape, a C-shape, a J-shape, an S-shape, and a U-shape.

[0054] 6, a plurality of dot-like half-cut portions 33a are arranged at intervals on a plane. Three or more half-cut portions 33a may be arranged on the same line. A row including a plurality of dot-like half-cut portions 33a may be arranged in two or more directions, such as the vertical direction, the horizontal direction, or the diagonal direction.

[0055] The packaging bag of the embodiment may have a marking indicating the position of the odor emitting part. Examples of the marking include, but are not limited to, letters, arrows, frames, etc. A removable adhesive sticker, label, etc. may be provided at a position covering the odor emitting part.

[0056] Although the present invention has been described above based on the preferred embodiment, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention. Modifications include addition, substitution, omission, and other changes of components.

[0057] Although not shown, an adhesive layer, resin layer, etc. may be interposed between the sealant layer 11 and the aroma retaining layer 12. When two or more aroma retaining layers 12 are laminated, the layers can be laminated with an adhesive layer. The adhesive layer can be formed from an adhesive, an anchor coating agent, an extruded resin layer, etc.

[0058] In the illustrated example of the packaging bag 20, the spout 24 formed integrally with the storage section 27 is formed in the body member 21, but this is not particularly limited. The packaging bag of the embodiment may be a packaging bag without a spout, or may be a packaging bag with a spout-type spout.

[0059] The dimensions of the packaging bag are not particularly limited. For example, in the case of use as a refill container, the vertical height is about 100 to 500 mm, the horizontal width is about 70 to 300 mm, and the filling amount is about 100 cm 3 ~5000cm 3 The degree of

[0060] The packaging bag of the embodiment can be filled with a predetermined content and then sealed to obtain a desired packaged product (packaging bag containing the content). The state of the content is not particularly limited, but may be fluid such as liquid, powder, or granule, or solid such as an article. The type of content is not particularly limited, but may be detergent, medicine, cosmetic, pharmaceutical, beverage, seasoning, ink, paint, fuel, etc. EXAMPLES

[0061] The present invention will now be described in detail with reference to examples.

[0062] A laminated film was prepared by laminating a 120 μm-thick polyethylene (PE) film, a PET film having a metal vapor deposition layer (VM), and a nylon (Ny) film in this order.

[0063] In Example 1, a half-cut portion was formed penetrating the Ny film and the VM-PET film from the Ny film side to the PE film. In Comparative Example 1, a half-cut portion penetrating only the Ny film was formed. In Comparative Example 2, a half-cut portion was formed penetrating from the Ny film side to the middle of the VM-PET film.

[0064] A packaging bag was made from the obtained laminated film, and a fabric softener imparted with a floral fragrance was filled in the bag, and the bag was sealed.

[0065] In the packaging bag of Example 1, the odor of the contents could be confirmed from the half-cut portion without opening the packaging bag. In the packaging bags of Comparative Examples 1 and 2, it was difficult to confirm the odor of the contents from the half-cut portion. [Explanation of symbols]

[0066] A...liquid-contacting area, B...non-liquid-contacting area, C...contents, D...gas, 10, 10A...laminate, 11...sealant layer, 12...aroma-retaining layer, 13, 31a, 32a, 33a...half-cut portion, 14...outer surface, 15...surface layer, 20...packaging bag, 21...body member, 21a, 21b...body seal portion, 22...bottom member, 22a...fold line, 22b...bottom seal portion, 23...upper seal portion, 24...pouring outlet, 25...flow path, 25a, 25b...flow path forming seal portion, 25c...flow path sealing seal portion, 26...opening start portion, 27...storage portion, 28...bottom, 30, 31, 32, 33...odor release portion.

Claims

1. A packaging bag formed from a laminate having a sealant layer and a flavor-retaining layer, A packaging bag characterized in that the laminate has a half-cut portion that penetrates the aroma-retaining layer, the half-cut portion reaching the outer surface of the laminate and reaching the sealant layer inside the aroma-retaining layer.

2. The packaging bag according to claim 1, characterized in that the packaging bag has a sealed portion on the periphery of the laminate, and the half-cut portion is located at a position 5 mm or more away from the sealed portion.

3. The packaging bag has a self-supporting bottom and a predetermined filling amount for liquid contents, The laminate has a liquid-contacting region where an inner surface of the laminate comes into contact with the contents when the packaging bag is self-supporting in a state where the contents are filled, and a liquid-non-contacting region where an inner surface of the laminate comes into contact with a gas above the contents, 3. The packaging bag according to claim 1, wherein the half-cut portion is disposed in the non-liquid-contact area.

4. The packaging bag according to claim 1 or 2, wherein the half-cut portions are formed in a non-intersecting shape in a plan view of the laminate.

5. The packaging bag according to claim 1 or 2, characterized in that the packaging bag has a storage section for the contents and an outlet for the contents, the storage section and the outlet are integrally formed from the laminate, and the half-cut portion is formed in a location different from the outlet.

6. 3. The packaging bag according to claim 1, wherein the half-cut portion is an odor release portion that enables the odor of the contents filled in the packaging bag to be confirmed without opening the packaging bag.

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