JP2019059512A - Bag having easily-opened seal line formed - Google Patents

Abstract

To provide a bag that enables a large opening to be formed.SOLUTION: The bag is made of a packaging material that includes a first base material layer and a sealant layer, has front and rear surfaces, and houses a content. The bag is provided with: first and second ends that extend in a short direction and face each other in a longitudinal direction; third and fourth ends that extend from the first end to the second end along the longitudinal direction, and face each other in the short direction; first and second end sealed parts that respectively extend along the first and second ends and join the inner surfaces of the packaging material; an unsealed part that is positioned between the first and second end sealed parts and in which the inner surfaces of the packaging material are not joined; and an easily-opened seal line that includes a non-through hole formed in the outer surface side of the packaging material in the unsealed part. The easily-opened seal line is configured to cross the front surface in the short direction and reach the rear surface side.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a bag in which an easy-open line is formed which does not penetrate the packaging material.

  As a bag for containing the contents, a film-like packaging material containing a plastic material such as PET or nylon is used. Such a bag is comprised by heat-welding the inner surfaces of a packaging material, and forming a seal | sticker part, as it describes, for example in patent document 1. FIG.

  When pouring the contents out of a bag made of packaging material, the user breaks a portion of the bag to form an opening. In order to facilitate the breakage of the bag, an easy-open line such as a half cut line is usually formed on a part of the packaging material constituting the bag. For example, in Patent Document 1, it is proposed to provide an easy-open line not penetrating the packaging material in a portion of the packaging material overlapping the contents. When removing the contents from this type of bag, the user causes the bag to be broken along the easy-open line by exerting a force on the easy-open line of the bag by bending or pushing the bag. . In this type of bag, the user can break part of the bag with a smaller force and take out the contents from the bag, as compared to a bag in which the user tears the bag apart.

Patent No. 5428647 gazette

  In the bag described in Patent Document 1, the easy-open line is formed only on the surface side of the bag. In this case, since the breakage of the bag also occurs only on the surface side, the opening may not be formed large.

  An object of the present invention is to provide a bag that can effectively solve such problems.

  The present invention is a bag formed of a packaging material including a first base material layer and a sealant layer, having a front surface and a back surface, and containing contents, the bag extending in the short direction and facing each other in the longitudinal direction A first end and a second end, a third end and a fourth end extending from the first end to the second end along the longitudinal direction and facing each other in the lateral direction; A first end seal and a second end seal extending along the first end and the second end and joining the inner surfaces of the packaging material, the first end seal and the first end seal. An easy-to-open including a non-sealed portion located between two end sealed portions, where the inner surfaces of the packaging material are not joined to each other, and a non-through hole formed on the outer surface side of the packaging material in the non-sealed portion A line, the easy-open line in the short direction of the surface Cross to being configured to reaching the back surface side, a bag.

  In the bag according to the present invention, the non-sealed portion is located adjacent to either the first end sealed portion or the second end sealed portion, and a portion in which the inner surfaces of the packaging material are in contact with each other. May be included.

  In the bag according to the present invention, the ratio of the dimension of the non-sealed portion in the short direction to the dimension of the non-sealed portion in the longitudinal direction may be 0.20 or more and 0.50 or less.

  In the bag according to the present invention, the easy-to-open line is located at least on the surface and is located on the back side with a center line extending along the short direction, and extends in a direction different from the direction in which the center line extends. And a suppression line.

  The present invention is a bag formed of a packaging material including a first base material layer and a sealant layer, having a front surface and a back surface, and containing contents, the bag extending in the short direction and facing each other in the longitudinal direction A first end and a second end, a third end and a fourth end extending from the first end to the second end along the longitudinal direction and facing each other in the lateral direction; A first end seal and a second end seal extending along the first end and the second end and joining the inner surfaces of the packaging material, the first end seal and the first end seal. A non-sealed portion located between the two end seal portions, where the inner surfaces of the packaging material are not joined together, and a non-through hole formed on the outer surface side of the packaging material at the non-sealed portion; An easy-open line partially extending in the lateral direction; Part includes a portion located adjacent to either the first end seal part or the second end seal part and in which the inner surfaces of the packaging material are in contact with each other, and in the longitudinal direction It is a bag whose ratio of the dimension of the said non-sealed part in the said transversal direction with respect to the dimension of the said non-sealed part is 0.20 or more and 0.50 or less.

  In the bag according to the present invention, when the packaging material includes an adhesive layer, the easy opening of the bag is fixed in a state where a portion of the bag located closer to the second end than the easy opening line is fixed. When a portion 1 cm away from the line to the first end side is pressed from the front side to the back side, a bending resistance which is a force required to bend the bag is preferably 25 N or more.

  In the bag according to the present invention, when the packaging material does not include an adhesive layer, the easy part of the bag is fixed in a state where a portion of the bag located closer to the second end than the easy-open line is fixed. When a portion 1 cm away from the unsealing line to the first end side is pressed from the front side to the back side, a bending resistance which is a force required to bend the bag is preferably 15 N or more.

  The bag according to the present invention may further include an integral palm extending along the longitudinal direction from the first end to the second end and having the packaging material stacked on the back side.

  In the bag according to the present invention, the content may include a plurality of particles.

  In the bag according to the present invention, the dimension of the non-sealed portion in the longitudinal direction may be 40 mm or more and 200 mm or less.

  In the bag according to the present invention, the easy-open line may include a portion extending along the short direction and having a wave shape.

  In the bag according to the present invention, the easy-to-open line is located on the front surface and has a center line extending along the short direction and a first side connected to one end of the center line and extending to the back surface. And a second side line connected to the other end of the center line and extending to reach the back surface, wherein the first side line is closer to the first end than the center line. A first end side first side line located, and a second end side first side line located closer to the second end side than the center line, wherein the second side line is the center A first end-side second side line located closer to the first end than the line, and a second end-side second side line located closer to the second end than the center line It may be.

  According to the present invention, the opening can be formed large in the bag. Therefore, the ease of taking out the contents can be improved.

It is a top view which shows the bag in embodiment of this invention. It is sectional drawing which looked at the bag of FIG. 1 from the II-II direction. It is sectional drawing which looked at the bag of FIG. 1 from the III-III direction. It is sectional drawing which expands and shows the content accommodated in the bag. It is sectional drawing which looked at the bag of FIG. 1 from the V-V direction. It is a top view which shows a mode that the bag shown in FIG. 1 is opened. It is a top view which shows the bag of the opened state. It is the figure which looked at the opening part shown in FIG. 7 from the arrow VIII direction. It is a top view which expands and shows the easy-to-open line of the bag concerning one modification. It is a top view which expands and shows the easy-to-open line of the bag concerning one modification. It is a top view which expands and shows the easy-to-open line of the bag concerning one modification. It is a figure explaining the method to measure the bending strength of a bag. It is a figure explaining the method to measure the bending strength of a bag. It is a figure which shows the evaluation result of Examples 1-5 and Comparative Examples 1-5. It is a figure which shows the evaluation result of Examples 6-10 and Comparative Examples 6-10.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 8. In the drawings attached to the present specification, for the sake of easiness of illustration and understanding, the scale, vertical and horizontal dimensional ratio, etc. are appropriately changed and exaggerated from those of the real thing.

  In addition, as used in the present specification, the shape or geometric condition and the degree thereof are specified. For example, terms such as “parallel”, “orthogonal”, “identical”, values of length and angle, etc. Without being bound by the meaning, it shall be interpreted including the extent to which the same function can be expected.

Bag Fig. 1 is a plan view showing a bag 10 in which the contents 19 are accommodated. Moreover, FIG. 2 is sectional drawing which looked at the bag 10 of FIG. 1 from the II-II direction. The bag 10 is formed by partially bonding the inner surfaces of the film-like packaging material 30 to each other. The bag 10 comprises a front side 11 and a back side 12 constituted by a packaging material 30. As shown in FIG. 2, the front surface 11 and the back surface 12 are both configured by folding back a sheet of packaging material 30. Although not shown, the number of the packaging materials 30 constituting the bag 10 is not limited to one, and the bag 10 may be configured of a plurality of packaging materials 30.

  The bag 10 is provided with the easy opening line 20 provided on the front surface 11 and the back surface 12. In the bag 10 according to the present embodiment, the bag 10 is broken along the easy-open line 20 to form an opening in the bag 10, and the contents 19 are taken out to the outside through the opening. A method is envisioned.

  The contents contained in the bag 10 are not particularly limited as long as they can be taken out of the bag 10 broken along the easy-open line 20. For example, as contents to be filled in the bag 10, liquids such as ponzu and dressing and liquid detergent, viscous bodies such as mayonnaise and ketchup, shampoo and rinse, powder bodies such as powder seasoning, and granular bodies such as rice And fluid having fluidity.

  Hereinafter, the configuration of the bag 10 will be described. As shown in FIG. 1, the bag 10 comprises a first end 13, a second end 14, a third end 15 and a fourth end 16. The first end 13 and the second end 14 face each other in the longitudinal direction D1 of the bag 10. In addition, the third end 15 and the fourth end 16 face each other in the short direction D2 of the bag 10. The third end 15 and the fourth end 16 extend from the first end 13 to the second end 14 along the longitudinal direction D1.

  The longitudinal direction D1 is a conveyance direction of the packaging material 30 when producing the bag 10 from the film-like packaging material 30, and is a so-called MD (Machine Direction). In the example shown in FIG. 1, the short direction D2 in which the first end 13 and the second end 14 extend and the longitudinal direction D1 in which the third end 15 and the fourth end 16 extend are orthogonal to each other. The bag 10 has a rectangular outer shape. Although not shown, the first end 13 and the second end 14 may extend in a direction inclined with respect to the longitudinal direction D1.

  As shown in FIG. 1 and FIG. 2, the bag 10 is provided with a seam 17 which extends along the longitudinal direction D1 from the first end 13 to the second end 14 and on which the packaging material 30 is superimposed. Thus, the bag 10 is a so-called pillow bag. The combined palm portion 17 is located on the back surface 12 side. In other words, in the present embodiment, the surface on the side on which the combined palm portion 17 is located is referred to as the back surface 12.

(Seal part)
The bag 10 includes a seal that joins the inner surfaces of the film-like packaging material 30. The seal portion includes a first end seal portion 131 extending along the first end portion, a second end seal portion 141 extending along the second end portion 14, and a joint palm portion seal portion 171 positioned on the joint portion 17. including. In addition, as long as the inner surfaces of the packaging material 30 can be joined and the bag 10 can be sealed, the method for forming the seal portion is not particularly limited. For example, the sealing portion may be formed by melting a part of the packaging material 30 by heating or the like and welding the inner surfaces of the packaging material 30 to each other. Alternatively, the seal portion may be formed by bonding the inner surfaces of the packaging material 30 with an adhesive or the like.

  As shown in FIG. 1, the joint seal part 171 extends in the longitudinal direction D <b> 1 from the first end seal part 131 to the second end seal part 141. As shown in FIG. 2, the combined sealing part 171 may extend to the tip part 172 of the combined palm part 17 in the lateral direction D 2, or although not shown, the combined sealing part 171 is a tip part It does not have to extend to 172. In addition, the joint sealing part 171 may extend to the base 173 of the joining part 17 in the short direction D2, or although not shown, the joint sealing part 171 does not extend to the base 173. It is also good.

(Non-sealed part)
Moreover, the bag 10 is provided with the non-sealed part 18 by which the inner surfaces of the packaging material 30 are not joined. FIG. 3 is a cross-sectional view of the bag 10 of FIG. 1 as viewed from the III-III direction. As shown in FIG. 3, the non-sealed portion 18 is a portion where the contents 19 exist between the inner surface of the packaging material 30 constituting the front surface 11 and the inner surface of the packaging material 30 constituting the back surface 12 (hereinafter referred to as (Also referred to as a first non-sealed portion 181). In the first non-sealed portion 181, as shown in FIG. 3, the inner surface of the packaging material 30 constituting the front surface 11 and the inner surface of the packaging material 30 constituting the back surface 12 both contact the contents 19. It may be

  In addition, non-sealed portion 18 includes a portion (hereinafter also referred to as second non-sealed portion 182) where the inner surface of packaging material 30 forming surface 11 and the inner surface of packaging material 30 forming back surface 12 are in contact. It may be. In the example shown in FIG. 3, the non-sealed portion 18 includes a second non-sealed portion 182 adjacent to the first end sealed portion 131 and a second non-sealed portion 182 adjacent to the second end sealed portion 141. . Although not shown, the non-sealed portion 18 may include only the second non-sealed portion 182 adjacent to either the first end sealed portion 131 or the second end sealed portion 141.

  The first non-sealed portion 181 and the second non-sealed portion 182 put the contents 19 into the inside of the bag 10 in a partially opened state, and subsequently release the air inside the bag 10 to the outside, and then The seal 10 is formed by sealing the bag 10 by forming a seal along the opening. The portion in which the inner surface of the packaging material 30 is in contact with the contents 19 is the first non-sealed portion 181, and the portion in which the inner surfaces of the packaging material 30 are in contact is the second non-sealed portion 182.

  Hereinafter, the advantage of discharging the air inside the bag 10 to the outside, that is, degassing will be described. Here, as shown in FIG. 4, the case where the content 19 includes a plurality of granular bodies 191 will be described. In this case, by carrying out the degassing of the inside of the bag 10, as shown in FIG. 4, the plurality of particles 191 can be brought into contact with each other. Further, the inner surface 301 of the packaging material 30 constituting the front surface 11 and the inner surface 301 of the packaging material 30 constituting the back surface 12 can be brought into contact with the plurality of granular bodies 191. Thereby, the ratio of the space in which the granular material 191 is not present among the space inside the bag 10 can be reduced, and the flowability of each granular material 191 can be reduced. For example, when the bag 10 is repeatedly shaken in the longitudinal direction D1 with the bag 10 held by hand, the contact state of each granular body 191 can be maintained. As a result, the entire content 19 can have a predetermined rigidity. For example, when the bag 10 is lifted so that the front surface 11 and the back surface 12 become parallel in the horizontal direction by gripping the first end 13 side of the bag 10, the contents 19 will not be bent. Moreover, when a force is applied to the bag 10, bending of the contents 19 and the bag 10 can be suppressed before the easy-open wire 20 breaks. Therefore, as described later, it becomes easy to apply a force to the bag 10 such that the bag 10 is bent in the longitudinal direction D1 to generate a tension on the packaging material 30 on the surface 11. Therefore, the bag 10 can be broken along the easy-open line 20 based on the tension applied to the packaging material 30 of the surface 11.

It is preferable that the size and weight of the granular material 191 be within the range in which the entire content 19 can have predetermined rigidity in a state where the inside of the bag 10 is degassed. For example, the average particle diameter of the granular body 191 is preferably 0.05 mm or more and 10 mm or less, and more preferably 0.5 mm or more and 5 mm or less. Alternatively, the average volume of each granular body 191 is preferably 0.05 mm ³ or more and 20 mm ³ or less, and more preferably 1 mm ³ or more and 10 mm ³ or less.

  In FIG. 1, reference symbol L1 denotes the dimension of the non-sealed portion 18 in the longitudinal direction D1, and reference symbol L2 denotes the dimension of the non-sealed portion 18 in the lateral direction D2. The dimension L1 may be, for example, 40 mm or more and 200 mm or less, and more preferably 50 mm or more and 150 mm or less. This enables the user to open the bag 10 while holding the bag 10 with one hand. The dimension L2 is, for example, 15 mm or more and 70 mm or less, and may be 20 mm or more and 50 mm or less.

  The ratio of the dimension L2 to the dimension L1 is, for example, 0.10 or more, 0.20 or more, or 0.30 or more. The ratio of the dimension L2 to the dimension L1, that is, L2 / L1 is, for example, 0.70 or less, and may be 0.60 or less, or 0.50 or less.

Some specific examples of dimension L1, dimension L2 and L2 / L1 are as follows.
L1 = 200 mm, L2 = 100 mm, L2 / L1 = 0.50
L1 = 180 mm, L2 = 40 mm, L2 / L1 = 0.22
・ L1 = 130 mm, L2 = 30 mm, L2 / L1 = 0.23
・ L1 = 100 mm, L2 = 20 mm, L2 / L1 = 0.20
・ L1 = 80 mm, L2 = 25 mm, L2 / L1 = 0.31
・ L1 = 60 mm, L2 = 30 mm, L2 / L1 = 0.50

  When the bag 10 is sealed in a state where the inside of the bag 10 is degassed, the pressure inside the bag 10 is lower than the atmospheric pressure. For this reason, when a part of the bag 10 is broken and the inside of the bag 10 is communicated with the outside, air flows into the inside of the bag 10, and the bag 10 at least partially inflates. Thus, whether or not the interior of the bag 10 is degassed can be determined based on whether the bag 10 is at least partially inflated after breaking a portion of the bag 10.

(Easy open line)
Next, the easy opening line 20 will be described. The easy-to-open line 20 is a linear portion of the packaging material 30 located in the non-sealed portion 18 so as to be easily broken.

  The easy-open line 20 at least includes a center line 21. The center line 21 is a portion of the easy-open line 20 which extends along the normal direction of the surface 11 so as to intersect the center line C of the bag 10 on the surface 11 side as viewed from the bag 10. The center line C is a straight line connecting the middle point of the first end 13 and the middle point of the second end 14. In the example shown in FIG. 1, the base portion 173 of the combined palm portion 17 coincides with the center line C.

  The easy opening line 20 is preferably located at the center of the non-sealed portion 18 in the longitudinal direction D1. The central portion is, for example, within 0.1 × L1 from the center of the non-sealed portion 18 in the longitudinal direction D1 to the first end 13 and the second end 14 side.

  In the present embodiment, as shown in FIGS. 1 and 2, the center line 21 crosses the surface 11 in the short direction D2 and reaches the back surface 12 side. For example, the center line 21 linearly extends from the surface 11 side to the back surface 12 side via the third end 15 and terminates at one end 211. The center line 21 linearly extends from the surface 11 side to the back surface 12 side via the fourth end portion 16 and terminates at the other end 212.

  In the example illustrated in FIG. 2, one end 211 and the other end 212 of the center line 21 face each other in the short direction D2 so as to sandwich the base 173 of the combined palm portion 17. A distance S1 between one end 211 and the other end 212 in the short direction D2 is, for example, 2 mm or more and 10 mm or less.

  The distance S1 may be defined with respect to the entire circumference of the bag 10 in the cross-sectional view along the lateral direction D2 shown in FIG. The ratio of the distance S1 to the entire circumference of the bag 10 is preferably 20% or less, more preferably 10% or less. In other words, the ratio of the length of the easy-to-open line 20 to the entire circumference of the bag 10 is preferably 80% or more, more preferably 90% or more. The entire circumference of the bag 10 includes the lengths of the surface 11, the back 12, the third end 15 and the fourth end 16 of the packaging material 30, but the length of the awning 17 is included. Absent.

  Next, the structure of the easy-open wire 20 formed on the packaging material 30 will be described together with the layer configuration of the packaging material 30 with reference to FIG. FIG. 5 is a cross-sectional view of the bag 10 of FIG. 1 as viewed from the V-V direction.

  First, the layer configuration of the packaging material 30 will be described. The packaging material 30 at least includes a base layer 31 and a sealant layer 32. In the example shown in FIG. 5, the base material layer 31 constitutes the outer surface 302 of the packaging material 30, and the sealant layer 32 constitutes the inner surface 301 of the packaging material 30. In addition, the packaging material 30 may further include an adhesive layer such as an adhesive layer 33 for bonding the base material layer 31 and the sealant layer 32. The adhesive layer is a layer constituted by an adhesive described later. The thickness of the packaging material 30 is, for example, 50 μm or more, and more preferably 55 μm or more. Moreover, the thickness of the packaging material 30 is 150 micrometers or less, for example, More preferably, it is 100 micrometers or less, More preferably, it is 80 micrometers or less.

  Examples of the material constituting the base layer 31 include polyesters such as polyethylene terephthalate (PET) and polybutylene terephthalate (PBT), polyamides such as nylon (Ny), and polyolefins such as high density polyethylene (HDPE) and polypropylene (PP) Stretched plastic films such as can be used. The stretched plastic film may be stretched in two axes of the longitudinal direction D1 and the transverse direction D2. As the base material layer 31, a biaxially stretched plastic film which is easy to tear in the short direction D2 may be used. Examples of such a film include "Trefhan YT42" which is a biaxially stretched polypropylene film manufactured by Toray Industries, Inc. and "Enbllet PC" which is a biaxially stretched polyethylene terephthalate film manufactured by Unitika. The packaging material 30 may include a plurality of base layers 31. The thickness of the base material layer 31 is, for example, 4 μm or more and 30 μm or less.

  As a material constituting the sealant layer 32, for example, polyethylene such as ethylene-methacrylic acid copolymer (EMMA), low density polyethylene (LDPE), linear low density polyethylene (LLDPE), or polypropylene (PP) may be used. Can. The sealant layer 32 is preferably unstretched. The thickness of the sealant layer 32 may be, for example, 60 μm or less, 50 μm or less, or 30 μm or less. The thickness of the sealant layer 32 is, for example, 13 μm or more. The sealant layer 32 may be composed of a single layer or may be composed of a plurality of layers.

  Although not shown, the packaging material 30 may further include a print layer including a printed indication for giving the bag 10 product information or giving an aesthetic appearance. The print layer is provided, for example, on the inner surface side of the base material layer 31. Examples of the printed display may include letters, numbers, symbols, figures, and patterns.

  Also, although not shown, the packaging material 30 may further include a functional layer. The functional layer is located, for example, between the base layer 31 and the sealant layer 32.

  As the functional layer, an appropriate one may be selected according to the required performance such as water vapor and other gas barrier properties, light shielding properties, various mechanical strengths and the like. For example, when the functional layer is a gas barrier layer, the functional layer may be a metal foil such as an aluminum foil. The functional layer may be a vapor deposition layer or a resin layer provided on the base material layer 31 or the sealant layer 32. The deposited layer contains, for example, a substance having a gas barrier property such as an inorganic substance such as aluminum or an inorganic oxide such as aluminum oxide or silicon oxide. The thickness of the vapor deposition layer is, for example, 5 nm or more and 200 nm or less, preferably 50 nm or more and 100 nm or less. The resin layer contains, for example, a resin material having gas barrier properties, such as ethylene-vinyl alcohol copolymer (EVOH), polyvinylidene chloride resin (PVDC), and aromatic polyamide such as nylon MXD6. By providing the functional layer having such gas barrier properties, it is possible to suppress oxygen and water vapor from invading the inside of the bag 10.

  Next, the structure of the easy opening line 20 will be described. As shown in FIG. 5, the easy-open wire 20 includes a non-through hole 201 formed in the outer surface 302 of the packaging material 30. In the example shown in FIG. 5, the non-through holes 201 are configured to penetrate the base material layer 31 and reach the adhesive layer 33. Although not shown, the non-through holes 201 may be configured not to penetrate the base material layer 31.

  The width S2 and the depth S3 of the non-through hole 201 of the easy-open line 20 are set so that the easy-open line 20 breaks when the user applies an appropriate force to the bag 10. For example, the width of the non-through hole 201 of the easy-open wire 20 is 80 μm or more and 1 mm or less. Further, the depth S3 of the non-through hole 201 is, for example, 12 μm or more and 40 μm or less. Such non-through holes 201 can be formed, for example, by processing the packaging material 30 by irradiating the packaging material 30 with laser light from the outer surface 302 side.

  The ease of breaking of the easy-to-open wire 20 when a force is applied to the bag 10 depends on the configuration, thickness, etc. of the portion of the packaging material 30 where the non-through holes 201 are not formed (hereinafter also referred to as residual portion). Dependent. The remaining portion includes at least the sealant layer 32. The remaining portion further includes an adhesive layer, an anchor coat layer, an adhesive resin layer, a uniaxially stretched film, and a functional layer, depending on the formation method of the non-through holes 201 and the layer configuration of the packaging material 30. The configuration of the remaining portion is set such that the remaining portion breaks properly within the range of force assumed to be applied to the easy-open line 20. When the packaging material contains an adhesive layer, the bending resistance of the bag 10 is strong, and when the packaging material does not contain an adhesive layer, the bending resistance of the bag 10 tends to be weak. The bending resistance of the bag 10 will be described later. The thickness of the remaining portion is set such that the remaining portion breaks properly within the range of force assumed to be applied to the easy-open line 20. The thickness of the residual portion is, for example, 80 μm or less, and may be 60 μm or less, or may be 50 μm or less.

(Adhesive layer)
The adhesive layer is used when laminating one layer and another layer using a dry lamination method. The adhesive constituting the adhesive layer may be a one-component or two-component cured or non-cured vinyl-based, (meth) acrylic, polyamide-based, polyester-based, polyether-based, polyurethane-based, epoxy-based, Rubber based, polyvinyl acetate based adhesives, homopolymers such as ethyl, butyl and 2-ethylhexyl esters of acrylic acid or polyacrylic acid esters comprising copolymers of these with methyl methacrylate, acrylonitrile, styrene and the like -Based adhesives, cyanoacrylate-based adhesives, ethylene copolymer-based adhesives consisting of copolymers of ethylene and vinyl acetate, ethyl acrylate, acrylic acid, methacrylic acid and other monomers, cellulose-based adhesives, polyester-based adhesives Agent, polyamide adhesive, polyimide adhesive, urea resin or mela From resin-based amino resin adhesives, phenol resin adhesives, epoxy adhesives, polyurethane adhesives, reactive (meth) acrylic adhesives, chloroprene rubber, nitrile rubber, styrene-butadiene rubber, etc. Inorganic adhesives, silicone adhesives, inorganic adhesives consisting of alkali metal silicate, low melting point glass, etc., and other adhesives can be used. More preferably, for example, aromatic polyisocyanates such as tolylene diisocyanate, diphenylmethane diisocyanate, polymethylene polyphenylene polyisocyanate, or polyfunctional isocyanates such as hexamethylene diisocyanate, aliphatic polyisocyanates such as xylylene diisocyanate, and polyether-based polyols And a polyurethane-based resin which is a cured product of a polyester-based polyol, a polyacrylate polyol, and another hydroxyl group-containing compound. According to these, it is possible to form a thin film rich in flexibility and flexibility, improve its tensile elongation, act as a film having flexibility, flexibility and the like, and processability such as laminating and printing Can be improved.
The above adhesive is applied, for example, using a direct gravure roll coating method, a gravure roll coating method, a kiss coating method, a reverse roll coating method, a fonten method, a transfer roll coating method, or another coating method, and the solvent is dried. And an adhesive layer can be formed.
The application amount of the adhesive is preferably 1.5 g / m ² or more and 10 g / m ² or less (dry state), and more preferably 3 g / m ² or more and 5 g / m ² or less (dry state). The thickness of the adhesive layer in the dry state is 1.5 μm to 10 μm, preferably 3 μm to 5 μm.

(Anchor coat layer)
When laminating an adhesive resin layer using a melt extrusion method or a melt extrusion laminating method, it is preferable to apply an anchor coat agent in advance to the layer on which the adhesive resin layer is laminated to form an anchor coat layer.
As an anchor coat agent which constitutes an anchor coat layer, For example, organic titanium type anchor coat agents, such as alkyl titanate, isocyanate type anchor coat agent, polyethylene imine type anchor coat agent, polybutadiene type anchor coat agent, isocyanate type (urethane type) And polyethyleneimine-based and other anchor coating agents can be exemplified. More preferably, for example, aromatic polyisocyanates such as tolylene diisocyanate, diphenylmethane diisocyanate, polymethylene polyphenylene polyisocyanate, or aliphatic polyisocyanates such as hexamethylene diisocyanate, xylylene diisocyanate, etc. It is preferable to use one having a polyurethane resin as a main component which is a cured product of a polyfunctional isocyanate, a polyether polyol, a polyester polyol, a polyacrylate polyol, and other hydroxyl group-containing compounds. The adhesion between the layers constituting the packaging material can be improved.
The anchor coat layer is formed by applying the above-mentioned anchor coat agent using, for example, a roll coat method, a gravure coat method, a knife coat method, a dip coat method, a spray coat method or other coating method and drying the solvent. can do.
The coating amount of the anchor coating agent is preferably in the range of 0.1 g / m ^{2 to} 0.5 g / m ² (dry state). The thickness of the anchor coat layer in the dry state is 0.5 μm or less, preferably 0.1 μm or less.

(Adhesive resin layer)
In the present invention, a resin layer made of a thermoplastic resin is used as the adhesive resin layer. Specifically, as the material of the adhesive resin layer, low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, copolymer with ethylene / α-olefin polymerized using a metallocene catalyst Polyethylene (PE) such as, ethylene · polypropylene copolymer, ethylene · vinyl acetate copolymer, ethylene · acrylic acid copolymer, ethylene · ethyl acrylate copolymer, ethylene · methacrylic acid copolymer, ethylene · methacrylic A resin obtained by graft polymerization or copolymerization of an acid methyl copolymer, ethylene / maleic acid copolymer, ionomer, polyolefin resin with unsaturated carboxylic acid, unsaturated carboxylic acid, unsaturated carboxylic acid anhydride, ester monomer And resins such as maleic anhydride grafted onto polyolefin resin Door can be. These materials can be used in combination of one or more.
In the present invention, the thickness of the adhesive resin layer is desirably 5 μm or more and 30 μm or less, preferably 10 μm or more and 120 μm or less. In addition, the adhesive resin layer can be not only a single layer but also a multilayer of two or more layers. In that case, the thickness of each layer can be set appropriately depending on the physical properties (heat adhesion, film stiffness, etc.) required for the packaging material.

(Uniaxially stretched film)
In the present invention, the uniaxially stretched film refers to a film stretched only in the short direction D2. As such a film, "kararyan Y" which is a high density polyethylene film made by Denka Co., Ltd., etc. may be mentioned.

An example of the layer configuration of the packaging material 30 is as follows.
First example: base layer / printed layer / adhesive layer / sealant layer Second example: base layer / printed layer / adhesive layer / deposited metal layer / sealant layer third example: base layer / printed layer / adhesion Layer / uniaxially stretched film / adhesive layer / sealant layer fourth example: base layer / printing layer / anchor coat layer / adhesive resin layer / uniaxial stretched film / anchor coat layer / sealant layer fifth example: base layer / Printing layer / anchor coating layer / adhesive resin layer / metal foil / anchor coating layer / adhesive resin layer / sealant layer Sixth example: base layer / printing layer / anchor coating layer / adhesive resin layer / sealant layer

The specific examples of the first to sixth examples are as follows.
First example: PET (12) / printing layer (1) / adhesive layer (3) / PE (50)
Second example: PP (25) / printing layer (1) / adhesive layer (3) / aluminum deposition layer (0.05) / PP (30)
Third example: Ny (15) / printing layer (1) / adhesive layer (3) / uniaxially stretched HDPE (18) / adhesive layer (3) / PE (40)
Fourth example: PET (12) / printing layer (1) / anchor coat layer (0.1) / PE (15) / uniaxially stretched HDPE (18) / anchor coat layer (0.1) / PE (30)
Fifth example: PET (12) / printing layer (1) / anchor coat layer (0.1) / PE (13) / aluminum foil (6) / anchor coat layer (0.1) / PE (13) / PE (30)
Sixth example: Ny (15) / printing layer (1) / anchor coat layer (0.1) / PE (13) / PE (30)
In the first to sixth examples, the plastic films constituting the base material layer are all biaxially stretched plastic films, and the sealant layers are all unstretched. Also, the numerical values in parentheses indicate the thickness of each layer. The unit of thickness is μm.

  In the packaging material 30, the non-through holes 201 are formed so as to penetrate at least the base material layer 31, and are not formed from the adhesive resin layer or uniaxially oriented film to the sealant layer 32 located at the outermost side.

  In the packaging material 30 of the first example, the non-through holes 201 are formed in the “PET (12) / printed layer (1)”, and the “adhesive (3) / PE (50)” becomes the remaining portion, and The non-through holes 201 may be formed in the “PET (12) / printed layer (1) / adhesive layer (3)”, and the “PE (50)” may be a remaining part. In the former case, the thickness of the portion of the packaging material 30 where the non-through hole 201 is formed is 13 μm, and the thickness of the remaining portion is 53 μm. In the latter case, the thickness of the portion of the packaging material 30 where the non-through holes 201 are formed is more than 13 μm and not more than 16 μm, and the thickness of the remaining portion is not less than 50 μm and less than 53 μm. Moreover, the thickness of the whole packaging material 30 is 66 micrometers.

  In the packaging material 30 of the second example, the non-through holes 201 are formed in “PP (25) / printed layer (1)”, “adhesive layer (3) / aluminum deposited layer (0.05) / PP (30) "" Becomes a remaining portion, "non-through hole 201 is formed in" PP (25) / printing layer (1) / adhesive layer (3) "", "aluminum deposition layer (0.05) / PP (30)" May be the remaining part. In the former case, the thickness of the portion of the packaging material 30 where the non-through hole 201 is formed is 26 μm, and the thickness of the remaining portion is 33.05 μm. In the latter case, the thickness of the portion where the non-through holes 201 are formed in the packaging material 30 is more than 26 μm and 29 μm or less, and the thickness of the remaining portion is 30.05 μm or more and less than 33.05 μm. Moreover, the thickness of the whole packaging material 30 is 59.05 micrometers.

  In the packaging material 30 of the third example, the non-through holes 201 are formed in “Ny (15) / printed layer (1)”, “adhesive layer (3) / uniaxially stretched HDPE (18) / adhesive layer ( 3) A non-through hole 201 is formed in “Ny (15) / printing layer (1) / adhesive layer (3)” when “PE (40)” is a remaining portion, “uniaxially stretched HDPE (18) ) / Adhesive layer (3) / PE (40) "may be a remaining part. In the former case, the thickness of the portion of the packaging material 30 where the non-through holes 201 are formed is 16 μm, and the thickness of the remaining portion is 64 μm. In the latter case, the thickness of the portion where the non-through holes 201 are formed in the packaging material 30 is more than 16 μm and 19 μm or less, and the thickness of the remaining portion is 61 μm or more and less than 64 μm. Moreover, the thickness of the whole packaging material 30 is 80 micrometers.

  In the packaging material 30 of the fourth example, the non-through holes 201 are formed in the “PET (12) / printed layer (1)”, and the “anchor coat layer (0.1) / PE (15) / uniaxially stretched HDPE (18) When the / anchor coat layer (0.1) / PE (30) becomes the remaining portion, a non-through hole 201 is formed in "PET (12) / printing layer (1) / anchor coat layer (0.1)", PE (15) / uniaxially stretched HDPE (18) / anchor coat layer (0.1) / PE (30) "may be a residual portion. In the former case, the thickness of the portion of the packaging material 30 where the non-through holes 201 are formed is 13 μm, and the thickness of the remaining portion is 63.2 μm. In the latter case, the thickness of the portion of the packaging material 30 where the non-through holes 201 are formed is more than 13 μm and 13.1 μm or less, and the thickness of the remaining portion is 63.1 μm or more and less than 63.2 μm. Moreover, the thickness of the whole packaging material 30 is 75.2 micrometers.

  In the packaging material 30 of the fifth example, the non-through holes 201 are formed in the “PET (12) / printed layer (1)”, and the “anchor coat layer (0.1) / PE (13) / aluminum foil (6) / In the case where the anchor coat layer (0.1) / PE (13) / PE (30) is the remaining part, the non-through holes 201 are present in the “PET (12) / printed layer (1) / anchor coat layer (0.1)”. It may be formed, and "PE (13) / aluminum foil (6) / anchor coat layer (0.1) / PE (13) / PE (30)" may become a remaining portion. In the former case, the thickness of the portion of the packaging material 30 where the non-through holes 201 are formed is 13 μm, and the thickness of the remaining portion is 62.2 μm. In the latter case, the thickness of the portion of the packaging material 30 where the non-through holes 201 are formed is more than 13 μm and 13.1 μm or less, and the thickness of the remaining portion is 62.1 μm or more and less than 62.2 μm. Moreover, the thickness of the whole packaging material 30 is 75.2 micrometers.

  In the packaging material 30 of the sixth example, the non-through holes 201 are formed in "Ny (15) / printed layer (1)", and "anchor coat layer (0.1) / PE (13) / PE (30)" When it becomes a remaining portion, non-through holes 201 are formed in Ny (15) / printing layer (1) / anchor coat layer (0.1) ", and" PE (13) / PE (30) "becomes a remaining portion There is a case. In the former case, the thickness of the portion of the packaging material 30 where the non-through holes 201 are formed is 16 μm, and the thickness of the remaining portion is 43.1 μm. In the latter case, the thickness of the portion of the packaging material 30 where the non-through holes 201 are formed is more than 16 μm and less than 16.1 μm, and the thickness of the remaining portion is 43. It is more than μm and less than 43.1 μm. Moreover, the thickness of the whole packaging material 30 is 59.1 micrometers.

Method of Manufacturing Bag Next, an example of a method of manufacturing the above-described bag 10 will be described.

  First, a long packaging material 30 is prepared. Next, while the packaging material 30 is conveyed along the MD of the packaging material 30, the non-through holes 201 of the easy-to-open line 20 are formed on the outer surface 302 of the packaging material 30. Subsequently, the packaging material 30 is bent into a cylindrical body. Then, the second end seal portion 141 is formed by holding the inner surfaces 301 facing each other in the cylindrical body while heating and pressing.

  Subsequently, the contents 19 are introduced into the inside of the cylindrical body. Further, the sealing portion 171 is formed by holding the heating material while pressing the overlapping portion of the packaging material 30 constituting the cylindrical body along the transport direction.

  Subsequently, the inside of the tubular body is degassed. For example, degassing is performed using a nozzle vacuum packing machine or a chamber vacuum packing machine. Thereafter, the first end seal portion 131 is formed by sandwiching the portion of the packaging material 30 constituting the cylindrical body, which faces the second end seal portion 141 with the contents 19 interposed therebetween, by heating and pressing.

  Next, at the positions of the first end seal portion 131 and the second end seal portion 141, the packaging material 30 constituting the cylindrical body is cut in the direction orthogonal to the transport direction. In this way, the bag 10 with the inside deaerated can be obtained.

Method of Opening the Bag Next, the method of opening the above-described bag 10 will be described with reference to FIGS. 6 and 7.

  First, as shown in FIG. 6, the user places the bag 10 on the first end 13 by, for example, attaching the index finger 41 of one hand and the second end 14 by, for example, the thumb 42 of one hand. Hold. Subsequently, a force is applied to the bag 10 to bend the bag 10 to the back surface 12 side in the longitudinal direction D1. For example, as shown in FIG. 6, a force F1 directed to the back surface 12 side and the second end 14 side is applied to the bag 10 from the first end 13 side. Further, a force F2 directed to the back surface 12 side and the first end 13 side is applied to the bag 10 from the second end 14 side.

  Here, in the present embodiment, as described above, the content 19 contained in the inside of the bag 10 includes a plurality of granular bodies 191, and the inside of the bag 10 is degassed. Therefore, the entire content 19 has a predetermined rigidity. Therefore, the force F1 and the force F2 shown in FIG. 6 each function as a force for bending the entire rigid content 19 toward the back surface 12 side.

  When the force F1 and the force F2 exceed the rigidity of the entire content 19, the entire content 19 is bent toward the back surface 12, and at this time, a tension is applied to the packaging material 30 constituting the surface 11. Here, in the present embodiment, the center line 21 of the easy-to-open line 20 is formed on the packaging material 30 constituting the surface 11. For this reason, the packaging material 30 which comprises the surface 11 can be fractured along the center line 21, and the opening 25 can be formed in the bag 10 as shown in FIG.

  Further, in the present embodiment, as described above, the center line 21 of the easy-to-open line 20 extends across the packaging material 30 constituting the surface 11 to the packaging material 30 constituting the back surface 12. Therefore, the breakage of the bag 10 along the center line 21 can be advanced from the surface 11 side to the back surface 12 side.

  FIG. 8 is a view of the opening 25 shown in FIG. 7 as viewed in the direction of the arrow VIII. In the present embodiment, the center line 21 of the easy-open line 20 extends to the back surface 12 side. For this reason, compared with the case where the easy-open wire 20 is formed only on the surface 11, the outline length of the opening 25 on the first end 13 side and the opening 25 on the second end 14 side The length of the contour can be increased respectively. Thereby, the area of the opening 25 can be increased, and the easiness of taking out the contents 19 can be improved.

  In addition, it is possible to add various change with respect to each embodiment mentioned above. Hereinafter, modified examples will be described. In the following description and the drawings used in the following description, for the parts that can be configured in the same manner as in the above-described embodiments, the same reference numerals are used as for the corresponding parts in the above-described embodiments. , Duplicate explanations are omitted. In addition, in the case where it is clear that the operation and effect obtained in the above-described embodiment can be obtained also in the modification, the description may be omitted.

(First modification)
In the above-described embodiment, an example in which the easy-open line 20 such as the center line 21 linearly extends is shown. In this modification, an example in which the easy-open wire 20 such as the center line 21 includes a portion having a wave shape will be described. FIG. 9 is a plan view showing the case where the bag 10 according to the present modification is viewed from the surface 11 side.

  In this modification, as shown in FIG. 9, the center line 21 extending in the short direction D2 has a wave shape. For example, the center line 21 includes a peak portion 203 located on the first end 13 side and a valley portion 204 located on the second end portion 14 side. In this case, when tension is applied to the packaging material 30 constituting the surface 11, the tension is concentrated on the peaks 203 or the valleys 204. For this reason, breakage along the easy-open line 20 can be easily started.

  In FIG. 9, the code S4 represents the period of the wave shape in the lateral direction D2, and the code S5 represents the amplitude of the wave shape. The period S4 is, for example, 2 mm or more and 13 mm or less. The amplitude S5 is, for example, 1 mm or more and 5 mm or less.

(Second modification)
In the present modification, an example in which the easy-to-open line 20 includes a plurality of lines will be described. FIG. 10 is a plan view showing the case where the bag 10 according to this modification is viewed from the surface 11 side.

  In the example shown in FIG. 10, the easy-open wire 20 is connected to the center line 21 located on the surface 11 side, the first side line 22 connected to one end 211 of the center line 21, and the other end 212 of the center line 21. And the second side line 23.

  The first side line 22 is closer to the first end side first side line 221 located closer to the first end 13 side than the center line 21 and the first end side first side line 221 and the center line 21 than the center line 21. And a second end side first side line 222 located on the side of the two end portions 14. The first end-side first side line 221 and the second end-side first side line 222 of the first side line 22 both extend to the back surface 12 via the third end 15.

  The second side line 23 is closer to the first end side second side line 231 located closer to the first end 13 side than the center line 21, the first side second side line 231 and the center line 21. And a second end side second side wire 232 located on the side of the two end portions 14. The first end side second side line 231 and the second end side second side line 232 of the second side line 23 both extend to the back surface 12 via the fourth end portion 16.

  Hereinafter, the operation of the bag 10 shown in FIG. 10 will be described. When a force is applied to the bag 10 to bend the bag 10 toward the back surface 12 in the longitudinal direction D1, tension is applied to the packaging material 30 constituting the surface 11, as described above. Here, in the present embodiment, each of the first side line 22 and the second side line 23 includes a plurality of lines aligned in the longitudinal direction D1. In this case, the tension applied to the packaging material 30 from the first end 13 side is a line located on the first end 13 side, for example, the first end side first side line 221 or the first end side second side line Join 231. Further, the tension applied to the packaging material 30 from the second end 14 side is a line located on the second end 14 side, for example, the second end side first side line 222 or the second end side second side line 232. Join in Thus, in the first side line 22 and the second side line 23, the tension from the first end 13 side and the tension from the second end 14 side are respectively applied to different lines.

  On the other hand, in the central portion in the short direction D2, both the tension from the first end 13 and the tension from the second end 14 are applied to the center line 21. For this reason, the center line 21 is more likely to break because the force is more concentrated than the first side line 22 and the second side line 23. Therefore, in the present embodiment, breakage along the center line 21 can be easily started.

  After the center line 21 is broken, in the first side line 22, the breakage progresses in either one of the first end side first side line 221 or the second end side first side line 222, and the back side 12 side Lead to Further, in the second side line 23 as well, breakage progresses in either one of the first end side second side line 231 or the second end side second side line 232 and reaches the back surface 12 side.

  In FIG. 10, reference numeral S6 denotes the dimension of the center line 21 in the lateral direction D2, and reference numeral S7 denotes the distance between the first end side first side line 221 and the second end side first side line 222. It represents the maximum distance in the longitudinal direction D1. The dimension S6 is set to facilitate concentration of tension on the center line 21, and is, for example, 3 mm or more and 15 mm or less. The maximum distance S7 is, for example, 2 mm or more and 8 mm or less. The maximum spacing in the longitudinal direction D1 between the first end side second side line 231 and the second end side second side line 232 is also equal to the maximum spacing S7.

(Third modification)
In the present modification, an example in which the easy-to-open line 20 includes the restraining line 24 will be described. FIG. 11 is a plan view showing the case where the bag 10 according to this modification is viewed from the back surface 12 side.

  In the example shown in FIG. 11, the easy-open wire 20 extends from the front surface 11 to the back surface 12, the center line 21, the inhibition line 24 connected to one end 211 of the center line 21, and the other end of the center line 21. And a suppression line 24 connected to 212. The inhibition line 24 extends in a direction different from the direction in which the center line 21 extends. For example, as shown in FIG. 11, the inhibition line 24 extends along the longitudinal direction D1 orthogonal to the short direction D2 in which the center line 21 extends. Therefore, the progress of breakage can be stopped at the suppression line 24.

  As shown in FIG. 11, the suppression line 24 is a first end side suppression line 241 extending from the one end 211 or the other end 212 of the center line 21 to the first end 13 side, and one end 211 of the center line 21 or the other. A second end side restraint line 242 may extend from the end 212 to the second end 14 side. Alternatively, although not shown, the suppression line 24 may include only one of the first end side suppression line 241 and the second end side suppression line 242.

  Although some modifications to the above-described embodiment have been described, it is of course possible to apply a plurality of modifications in combination as appropriate.

  EXAMPLES The present invention will next be described in more detail by way of examples, which should not be construed as limiting the scope of the invention unless the gist thereof is exceeded.

Example 1
Layer configuration shown in the above third example, ie
ONy (15) / printing layer (1) / adhesive layer (3) / uniaxially stretched HDPE (18) / adhesive layer (3) / PE (40)
A packaging material 30 having the following layer configuration was prepared. The non-through holes 201 were formed in Ny (15) / printed layer (1). Subsequently, the packaging material 30 was used to produce the bag 10 shown in FIG. The dimension L1 in the longitudinal direction D1 of the non-sealed portion 18 of the bag 10 was 120 mm, and the dimension L2 in the short direction D2 of the non-sealed portion 18 was 25 mm. The contents of the bag 10 were granular instant coffee. In addition, the inside of the bag 10 was degassed before the bag 10 was sealed.

  Subsequently, the bending strength of the bag 10 was measured in a compression test mode using a tensile tester (Tensileon). Specifically, first, as shown in FIG. 12A, the bag 10 is supported on a support base 52 so that the back surface 12 of the portion of the bag 10 located closer to the second end 14 than the easy opening line 20 contacts the support base 52. It mounted on 52. Subsequently, as shown in FIG. 12A, in a state where the portion of the bag 10 located closer to the second end 14 than the easy opening line 20 is fixed to the support 52 so as not to be displaced, as shown in FIG. A portion separated by a distance T from the easy-open line 20 to the first end 13 side was pressed from the surface 11 side to the back surface 12 side with a force F 3 using a jig 51. As the jig 51, a metal jig provided in a tensile tester (Tensileon) was used. The distance T was 1 cm.

  The force F3 by which the jig 51 presses the bag 10 is increased until the bag 10 is bent. As a result, when the force F3 is 26.7 N, as shown in FIG. 12B, the easy-open wire 20 is broken and the bag 10 is broken, and the jig 51 is pulled out to the first end 13 side of the bent bag 10 went. The force F3 when the sack 10 was bent and the jig 51 pulled out to the first end 13 side, that is, 26.7 N, was recorded as the bending resistance of the sack 10.

(Example 2)
The bag 10 was produced using the packaging material 30 in the same manner as in Example 1 except that sprinkle was used as the contents. Subsequently, the bending resistance of the bag 10 was measured. As a result, when the force F3 was 30.8 N, the easy-open wire 20 was broken, the bag 10 was broken, and the jig 51 was pulled out to the first end 13 side.

(Example 3)
The packaging material is the same as in Example 2 except that the dimension L1 in the longitudinal direction D1 of the non-sealed portion 18 of the bag 10 is 130 mm and the dimension L2 in the short direction D2 of the non-sealed portion 18 is 30 mm. The bag 10 was produced using 30. Subsequently, the bending resistance of the bag 10 was measured. As a result, when the force F3 was 34.0 N, the easy-open wire 20 was broken, the bag 10 was broken, and the jig 51 was pulled out to the first end 13 side.

(Example 4)
The bag 10 was produced using the packaging material 30 in the same manner as in Example 1 except that cereals were used as the contents. Subsequently, the bending resistance of the bag 10 was measured. As a result, when the force F3 was 26.5 N, the easy-open wire 20 was broken, the bag 10 was broken, and the jig 51 was pulled out to the first end 13 side.

(Example 5)
A bag 10 was produced using the packaging material 30 in the same manner as in Example 1 except that a powder detergent was used as the content. Subsequently, the bending resistance of the bag 10 was measured. As a result, when the force F3 was 28.6 N, the easy-open wire 20 was broken, the bag 10 was broken, and the jig 51 was pulled out to the first end 13 side.

(Comparative example 1)
Before sealing the bag 10, the packaging material 30 is used in the same manner as in Example 1, except that the inside of the bag 10 is not degassed but the inside of the bag 10 is filled with gas. A bag 10 was made. Subsequently, the bending resistance of the bag 10 was measured. As a result, when the force F3 was 9.8 N, the bag 10 was broken without breakage of the easy-open wire 20, and the jig 51 was pulled out to the first end 13 side.

(Comparative example 2)
Before sealing the bag 10, the packaging material 30 is used in the same manner as in Example 2, except that the inside of the bag 10 is not degassed but the inside of the bag 10 is filled with gas. A bag 10 was made. Subsequently, the bending resistance of the bag 10 was measured. As a result, when the force F3 was 14.7 N, the bag 10 was broken without breakage of the easy opening wire 20, and the jig 51 was pulled out to the first end 13 side.

(Comparative example 3)
Before sealing the bag 10, the packaging material 30 is used in the same manner as in Example 3, except that the inside of the bag 10 is not degassed but the inside of the bag 10 is filled with gas. A bag 10 was made. Subsequently, the bending resistance of the bag 10 was measured. As a result, when the force F3 was 24.3 N, the bag 10 was broken without breakage of the easy-open wire 20, and the jig 51 was pulled out to the first end 13 side.

(Comparative example 4)
Before sealing the bag 10, the packaging material 30 is used in the same manner as in Example 4, except that the inside of the bag 10 is not degassed but the inside of the bag 10 is filled with gas. A bag 10 was made. Subsequently, the bending resistance of the bag 10 was measured. As a result, when the force F3 was 14.6 N, the bag 10 was broken without breakage of the easy-open wire 20, and the jig 51 was pulled out to the first end 13 side.

(Comparative example 5)
Before sealing the bag 10, the packaging material 30 is used in the same manner as in Example 5, except that the inside of the bag 10 is not degassed but the inside of the bag 10 is filled with gas. A bag 10 was made. Subsequently, the bending resistance of the bag 10 was measured. As a result, when the force F3 was 21.7 N, the bag 10 was bent without breakage of the easy-open wire 20, and the jig 51 was pulled out to the first end 13 side.

  The evaluation results in Examples 1 to 5 and Comparative Examples 1 to 5 are collectively shown in FIG. In the bag 10 in which the internal degassing was performed according to Examples 1 to 5, the bending resistance was 26 N or more. Further, when the force F3 of 26 N or more was applied to the bag 10, the easy-open line 20 was broken before the contents of the bag 10 were broken, so the bag 10 could be opened. In Examples 1 to 5, it is considered that the bending of the bag 10 is caused by breakage of the easy-open wire 20 and elimination of the internal degassing state and reduction in the rigidity of the contents.

  On the other hand, in the bag 10 according to Comparative Examples 1 to 5 in which the gas is filled therein, the bending resistance was 25 N or less. Specifically, bending of the contents and the bag 10 occurred before the easy-open line 20 was broken. For this reason, the bag 10 could not be opened.

(Example 6)
Layer configuration shown in the above fifth example, ie
PET (12) / printing layer (1) / anchor coat layer (0.1) / PE (13) / aluminum foil (6) / anchor coat layer (0.1) / PE (13) / PE (30)
The bag 10 was produced using the packaging material 30 in the same manner as in Example 1 except that the packaging material 30 having the following layer configuration was used. The non-through holes 201 were formed in the PET (12) / printing layer (1). Subsequently, the bending resistance of the bag 10 was measured. As a result, when the force F3 was 16.0 N, the easy-open wire 20 was broken, the bag 10 was broken, and the jig 51 was pulled out to the first end 13 side.

(Example 7)
The bag 10 was produced using the packaging material 30 in the same manner as in Example 6 except that sprinkle was used as the contents. Subsequently, the bending resistance of the bag 10 was measured. As a result, when the force F3 was 16.3 N, the easy-open wire 20 was broken, the bag 10 was broken, and the jig 51 was pulled out to the first end 13 side.

(Example 8)
In the same manner as in Example 7, except that the dimension L1 in the longitudinal direction D1 of the non-sealed portion 18 of the bag 10 is 130 mm and the dimension L2 in the short direction D2 of the non-sealed portion 18 is 30 mm The bag 10 was produced using 30. Subsequently, the bending resistance of the bag 10 was measured. As a result, when the force F3 was 20.9 N, the easy-open wire 20 was broken, the bag 10 was broken, and the jig 51 was pulled out to the first end 13 side.

(Example 9)
The bag 10 was produced using the packaging material 30 in the same manner as in Example 6 except that cereals were used as the contents. Subsequently, the bending resistance of the bag 10 was measured. As a result, when the force F3 was 25.8 N, the easy opening wire 20 was broken, the bag 10 was broken, and the jig 51 was pulled out to the first end 13 side.

(Example 10)
A bag 10 was produced using the packaging material 30 in the same manner as in Example 6, except that a powder detergent was used as the content. Subsequently, the bending resistance of the bag 10 was measured. As a result, when the force F3 was 27.0 N, the easy-open wire 20 was broken, the bag 10 was broken, and the jig 51 was pulled out to the first end 13 side.

(Comparative example 6)
Before sealing the bag 10, the packaging material 30 is used in the same manner as in Example 6, except that the inside of the bag 10 is not degassed but the inside of the bag 10 is filled with gas. A bag 10 was made. Subsequently, the bending resistance of the bag 10 was measured. As a result, when the force F3 was 11.6 N, the bag 10 was broken without breakage of the easy-open wire 20, and the jig 51 was pulled out to the first end 13 side.

(Comparative example 7)
Before sealing the bag 10, the packaging material 30 is used in the same manner as in Example 7, except that the inside of the bag 10 is not degassed but the inside of the bag 10 is filled with gas. A bag 10 was made. Subsequently, the bending resistance of the bag 10 was measured. As a result, when the force F3 was 14.4 N, the bag 10 was broken without breakage of the easy opening wire 20, and the jig 51 was pulled out to the first end 13 side.

(Comparative example 8)
Before sealing the bag 10, the packaging material 30 is used in the same manner as in Example 8 except that the inside of the bag 10 is not degassed but the inside of the bag 10 is filled with gas. A bag 10 was made. Subsequently, the bending resistance of the bag 10 was measured. As a result, when the force F3 was 12.1 N, the bag 10 was broken without breakage of the easy-open wire 20, and the jig 51 was pulled out to the first end 13 side.

(Comparative example 9)
Before sealing the bag 10, the packaging material 30 is used in the same manner as in Example 9, except that the inside of the bag 10 is not degassed but the inside of the bag 10 is filled with gas. A bag 10 was made. Subsequently, the bending resistance of the bag 10 was measured. As a result, when the force F3 was 8.3 N, the bag 10 was bent without breakage of the easy-open wire 20, and the jig 51 was pulled out to the first end 13 side.

(Comparative example 10)
Before sealing the bag 10, the packaging material 30 is used in the same manner as in Example 10 except that the inside of the bag 10 is not degassed but the inside of the bag 10 is filled with gas. A bag 10 was made. Subsequently, the bending resistance of the bag 10 was measured. As a result, when the force F3 was 10.9 N, the bag 10 was broken without breakage of the easy-open wire 20, and the jig 51 was pulled out to the first end 13 side.

  The evaluation results in Examples 6 to 10 and Comparative Examples 6 to 10 are collectively shown in FIG. In the bag 10 which implemented internal degassing which concerns on Examples 6-10, bending resistance was 16 N or more. In addition, when the force F3 of 16 N or more was applied to the bag 10, the easy-open line 20 was broken before the contents of the bag 10 were broken, and the bag 10 could be opened. In Examples 6 to 10, it is considered that the bending of the bag 10 is caused by breakage of the easy-open wire 20 and elimination of the internal degassing state and reduction in the rigidity of the contents.

  On the other hand, in the bag 10 according to Comparative Examples 6 to 10 in which the gas is filled therein, the bending resistance was 15 N or less. Specifically, bending of the contents and the bag 10 occurred before the easy-open line 20 was broken. For this reason, the bag 10 could not be opened.

DESCRIPTION OF SYMBOLS 10 bag 11 surface 12 back surface 13 1st end part 131 1st end seal part 14 2nd end part 141 2nd end seal part 15 3rd end part 16 4th end part 17 joint palm part 171 joint palm part seal part 172 tip Part 173 base 18 non-sealed part 181 first non-sealed part 182 second non-sealed part 19 contents 191 granular material 20 easy-to-open line 201 non-through hole 21 center line 211 one end 212 other end 22 first side line 221 first end Part side first side line 222 second end side first side line 23 second side line 231 first end side second side line 232 second end side second side line 24 restraint line 241 first end side Suppression line 242 Second end side suppression line 30 Packaging material 31 Base material layer 32 Sealant layer 33 Adhesive layer 41 Index finger 42 Thumb

Claims (12)

A bag formed by a packaging material including a first base material layer and a sealant layer, having a front surface and a back surface, and containing contents.
First and second ends extending in the transverse direction and opposed to each other in the longitudinal direction;
Third and fourth end portions extending from the first end to the second end along the longitudinal direction and facing each other in the lateral direction;
A first end seal and a second end seal that extend along the first end and the second end and join the inner surfaces of the packaging material, respectively;
A non-sealed portion located between the first end sealed portion and the second end sealed portion, wherein the inner surfaces of the packaging material are not joined to each other;
An easy-open line including a non-through hole formed on the outer surface side of the packaging material at the non-sealed portion;
The bag, wherein the easy-open line crosses the surface in the lateral direction and reaches the back side.   The non-sealed portion includes a portion located adjacent to either the first end sealed portion or the second end sealed portion and in which the inner surfaces of the packaging material are in contact with each other. The bag described in.   The bag according to claim 1 or 2, wherein a ratio of a dimension of the non-sealed portion in the short direction to a dimension of the non-sealed portion in the longitudinal direction is 0.20 or more and 0.50 or less. The easy opening line is
A center line located at least on the surface and extending along the lateral direction;
The bag according to any one of claims 1 to 3, further comprising a restraining line located on the back surface side and extending in a direction different from a direction in which the center line extends. A bag formed by a packaging material including a first base material layer and a sealant layer, having a front surface and a back surface, and containing contents.
First and second ends extending in the transverse direction and opposed to each other in the longitudinal direction;
Third and fourth end portions extending from the first end to the second end along the longitudinal direction and facing each other in the lateral direction;
A first end seal and a second end seal that extend along the first end and the second end and join the inner surfaces of the packaging material, respectively;
A non-sealed portion located between the first end sealed portion and the second end sealed portion, wherein the inner surfaces of the packaging material are not joined to each other;
An easy-open line including a non-through hole formed on the outer surface side of the packaging material at the non-sealing portion and extending at least partially in the short direction;
The non-sealed portion includes a portion positioned adjacent to either the first end seal portion or the second end seal portion, and in which the inner surfaces of the packaging material are in contact with each other,
The bag wherein the ratio of the dimension of the non-sealed portion in the lateral direction to the dimension of the non-sealed portion in the longitudinal direction is 0.20 or more and 0.50 or less.   When the packaging material includes an adhesive layer, the first end from the easy-open line of the bag is fixed in a state where a portion of the bag located closer to the second end than the easy-open line is fixed. The bending resistance which is a force required to bend the bag is 25 N or more when a portion separated by 1 cm to the part side is pressed from the front side to the back side. The bag described in.   In the case where the packaging material does not include an adhesive layer, the first portion of the bag is fixed in a state where a portion of the bag located closer to the second end with respect to the easy opening line is fixed. The bending resistance which is a force required to bend the bag is 15 N or more when a portion separated by 1 cm to the end side is pressed from the front side to the back side. The bag described in the section.   8. The light emitting device according to claim 1, further comprising an integral palm portion extending along the longitudinal direction from the first end to the second end, and overlapping the packaging material on the back surface side. bag.   The bag according to any one of the preceding claims, wherein the content comprises a plurality of granules.   The bag according to any one of claims 1 to 9, wherein the dimension of the non-sealed portion in the longitudinal direction is 40 mm or more and 200 mm or less.   The bag according to any one of claims 1 to 10, wherein the easy-open line includes a portion extending along the short direction and having a wave shape. The easy opening line is
A center line located on the surface and extending along the lateral direction;
A first side line connected to one end of the center line and extending to the back surface;
And a second side line connected to the other end of the center line and extending to the back surface,
The first side line is a first end side first side line located closer to the first end than the center line, and a second end side located closer to the second end than the center line. Side first side lines, and
The second side line is a first end-side second side line positioned closer to the first end than the center line, and a second end positioned closer to the second end than the center line. The bag according to any one of the preceding claims, comprising a side second side line.