WO2022149469A1 - 包装袋、包装袋の製造方法、及びシート包装体 - Google Patents
包装袋、包装袋の製造方法、及びシート包装体 Download PDFInfo
- Publication number
- WO2022149469A1 WO2022149469A1 PCT/JP2021/047536 JP2021047536W WO2022149469A1 WO 2022149469 A1 WO2022149469 A1 WO 2022149469A1 JP 2021047536 W JP2021047536 W JP 2021047536W WO 2022149469 A1 WO2022149469 A1 WO 2022149469A1
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- Prior art keywords
- packaging bag
- paper
- sheet
- resin layer
- less
- Prior art date
Links
- 238000004806 packaging method and process Methods 0.000 title claims abstract description 258
- 238000004519 manufacturing process Methods 0.000 title claims description 20
- 229920005989 resin Polymers 0.000 claims abstract description 101
- 239000011347 resin Substances 0.000 claims abstract description 101
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 15
- 239000000123 paper Substances 0.000 claims description 137
- 238000007789 sealing Methods 0.000 claims description 39
- 238000003466 welding Methods 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 17
- 239000002655 kraft paper Substances 0.000 claims description 16
- 229920000297 Rayon Polymers 0.000 claims description 15
- 238000003776 cleavage reaction Methods 0.000 claims description 15
- 239000002964 rayon Substances 0.000 claims description 15
- 230000007017 scission Effects 0.000 claims description 15
- 229920001684 low density polyethylene Polymers 0.000 claims description 11
- 239000004702 low-density polyethylene Substances 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000005304 joining Methods 0.000 claims description 6
- 238000012360 testing method Methods 0.000 description 34
- 239000000853 adhesive Substances 0.000 description 19
- 230000001070 adhesive effect Effects 0.000 description 19
- 238000009423 ventilation Methods 0.000 description 19
- 238000011156 evaluation Methods 0.000 description 17
- 230000000052 comparative effect Effects 0.000 description 14
- 238000005259 measurement Methods 0.000 description 12
- 239000000835 fiber Substances 0.000 description 8
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- 239000011121 hardwood Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 230000007613 environmental effect Effects 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 229920001131 Pulp (paper) Polymers 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 241000209094 Oryza Species 0.000 description 3
- 235000007164 Oryza sativa Nutrition 0.000 description 3
- BXKDSDJJOVIHMX-UHFFFAOYSA-N edrophonium chloride Chemical compound [Cl-].CC[N+](C)(C)C1=CC=CC(O)=C1 BXKDSDJJOVIHMX-UHFFFAOYSA-N 0.000 description 3
- 235000009566 rice Nutrition 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
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- 229920000092 linear low density polyethylene Polymers 0.000 description 2
- 239000004707 linear low-density polyethylene Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000002194 synthesizing effect Effects 0.000 description 2
- MIDXCONKKJTLDX-UHFFFAOYSA-N 3,5-dimethylcyclopentane-1,2-dione Chemical compound CC1CC(C)C(=O)C1=O MIDXCONKKJTLDX-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 229920000426 Microplastic Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 235000013736 caramel Nutrition 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000006210 lotion Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003020 moisturizing effect Effects 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
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Images
Classifications
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- B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
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- B65D2205/00—Venting means
- B65D2205/02—Venting holes
Definitions
- the present invention relates to a packaging bag, a method for manufacturing a packaging bag, and a sheet package.
- a sheet package containing sheets such as paper towels and tissue paper is distributed and used with a plurality of sheets housed in a resin film packaging bag (for example, Patent Documents 1 and 2).
- the wrapping bag of the sheet wrapping body is made of paper
- the wrapping bag made of paper is less flexible than the wrapping bag made of resin, so that the wrapping bag breaks during the manufacturing or transportation of the sheet wrapping body. It's easy to do.
- An object of the present invention is to provide a packaging bag that is hard to break even if it is made of paper.
- the packaging bag according to one aspect of the present invention is a packaging bag for accommodating a sheet, and is a paper layer containing a paper component and a resin layer containing a thermoplastic resin provided on at least one surface of the paper layer. And, the ratio of the paper component in the packaging bag is 50% or more.
- FIG. 1 is a diagram showing a sheet package in which a sheet is housed in the packaging bag of the embodiment.
- FIG. 2 is a diagram showing a sheet housed in the packaging bag of the embodiment.
- FIG. 4 shows the sheet package of FIG. 1 as viewed from the top side, the bottom side, the front side, the back side, the left side side, and the right side side, respectively. It is a figure.
- the sheet package 100 has a packaging bag 10 and a sheet laminate 20 (a plurality of sheets S).
- the sheet package 100 is an example of the sheet package according to the present embodiment.
- the packaging bag 10 is an example of a packaging bag constituting the sheet packaging body according to the present embodiment.
- the sheet laminate 20 is an example of a sheet housed in the packaging bag according to the present embodiment.
- the packaging bag 10 accommodates a plurality of (or a plurality of sets) of laminated sheets S (sheet laminated body 20 or laminated body SL).
- the sheet laminate 20 is housed in the packaging bag 10 so that the stacking direction (SD direction) of the sheets S is the height direction (Z direction).
- the sheet laminate 20 is designed so that the sheets S can be pulled out one by one through the outlet 30 (opening OP) described later formed in the packaging bag 10 (see FIG. 15).
- the form of the laminated body SL of the sheets S is not particularly limited, and for example, the sheets S are laminated in a folded state, and the sheets S are alternately laminated in a folded state (so-called pop-up type).
- a sheet laminate), a sheet in which a plurality of sheets S are simply laminated, or the like can be adopted.
- the dimensions of the sheet S are such that the length L2 in the longitudinal direction (X direction) of the packaging bag 10 is about 150 to 250 mm, and the width direction (X direction) orthogonal to the longitudinal direction (X direction) of the packaging bag 10 is formed.
- the width W2 in the Y direction (Y direction) can be about 70 to 150 mm, and the height H2 in the height direction (Z direction) can be about 20 to 100 mm (see FIGS. 2 and 3).
- Such a laminate of tissue paper can be produced, for example, by a rotary type or a multi-stand type interfolder.
- the aspect of the sheet S is not particularly limited, and can be applied to, for example, sanitary tissue paper such as paper towel, kitchen paper, tissue paper, and toilet paper.
- sanitary tissue papers also include hygienic tissue papers containing moisturizing ingredients (eg, lotion tissue paper, etc.).
- the use of the sheet S is not particularly limited, and can be applied to any of industrial, household, and portable use. Among these, as the sheet in the present embodiment, household and portable paper towels are preferably used.
- the number of plies of the sheet S is not particularly limited, but can be 1 ply or more, and is preferably 1 ply or 2 plies (two layers).
- the shape of the sheet S is not particularly limited, but it is preferable that the contour shape is a quadrangle (rectangle, square, etc.) in a folded state of the 2-ply sheet, for example.
- the material of the sheet S is not particularly limited, but for example, a sheet such as paper, non-woven fabric or cloth can be used, and paper (paper sheet) is preferable.
- a sheet such as paper, non-woven fabric or cloth
- paper paper sheet
- a base paper containing pulp as a main raw material is used.
- the pulp composition a known composition in a paper sheet can be used.
- the blending ratio of the pulp can be 50% by mass or more, preferably 90% by mass or more, and more preferably 100% by mass.
- the pulp composition in the sheet S is not particularly limited.
- softwood pulp such as NBKP (softwood kraft pulp) and NUKP (unbleached softwood pulp) and broadwood pulp such as LBKP (hardwood kraft pulp) and LUKP (hardwood unbleached pulp) may be used in an arbitrary ratio. Can be done.
- the ratio of hardwood pulp to softwood pulp is not limited, but is preferably 10:90 to 80:20, and more preferably the ratio of softwood pulp to hardwood pulp is higher. Further, used paper pulp may be used as the pulp contained in the sheet S (paper sheet).
- the basis weight of the sheet S is not particularly limited, but in the case of paper, it is 5 g / m 2 or more and 80 g / m 2 or less, preferably 10 g / m 2 or more and 60 g / m 2 or less, more preferably, depending on the number of plies. Is 10 g / m 2 or more and 45 g / m 2 or less. In the case of non-woven fabric, it is desirable that it is 20 g / m 2 or more and 100 g / m 2 or less.
- the basis weight is measured in accordance with the provisions of JIS P 8124 (2011).
- the thickness of the sheet S is not particularly limited, and the paper thickness measured under the environment of JIS P 8111 (1998) can be adopted.
- the paper thickness is 50 ⁇ m or more and 600 ⁇ m or less, preferably 60 ⁇ m or more and 500 ⁇ m or less, and more preferably 130 ⁇ m or more and 400 ⁇ m or less per 2 plies.
- the sheet S (paper sheet) may be embossed.
- embossing can be carried out by a known embossing method.
- the packaging bag 10 has a paper layer 10A containing a paper component and a resin layer (resin layer 10B or resin layer 10B, 10C) containing a thermoplastic resin provided on at least one surface of the paper layer 10A. (FIG. 9, FIG. 10).
- the ratio of the paper component in the packaging bag 10 is 50% or more.
- the paper component is, for example, a substance (pulp) in which plant fibers are stuck.
- the pulp composition in the paper component is not limited, and is, for example, a pulp composition in which the ratio of hardwood pulp to softwood pulp is 0: 100 to 70:30, and preferably the ratio of softwood pulp to hardwood pulp is higher. Further, used paper pulp may be used as the pulp.
- the resin layer provided on at least one surface of the paper layer 10A is, for example, a two-layer structure (FIG. 9) in which the resin layer 10B is provided on one side of the paper layer 10A, or the paper layer 10A. It is a three-layer structure (FIG. 10) in which resin layers 10B and 10C are laminated on both sides of the above.
- the material of the paper layer 10A constituting the packaging bag 10 is not particularly limited, but can be formed of, for example, kraft paper or rayon paper.
- kraft paper is paper made from kraft pulp.
- rayon paper is made by blending rayon fiber made by chemically synthesizing wood pulp or the like into kraft pulp.
- the rayon paper preferably contains 20% or less of rayon fibers by mass ratio from the viewpoint of achieving both the softness and the strength of the packaging bag 10.
- the basis weight of the paper layer 10A constituting the packaging bag 10 is not limited, but is preferably 10 g / m 2 or more and 40 g / m 2 or less, more preferably 15 g / m 2 or more and 35 g / m 2 or less, and further preferably. It is 20 g / m 2 or more and 30 g / m 2 or less.
- the basis weight is measured in accordance with the provisions of JIS P 8124 (2011).
- the thickness of the paper layer 10A constituting the packaging bag 10 is not limited, but is preferably, for example, preferably 20 ⁇ m or more and 100 ⁇ m or less, more preferably 25 ⁇ m or more and 90 ⁇ m or less, and further preferably 40 ⁇ m or more and 75 ⁇ m or less.
- the thickness is measured in accordance with the provisions of JIS P 8118 (2014).
- the material of the thermoplastic resin contained in the resin layers 10B and 10C constituting the packaging bag 10 is not particularly limited, but is preferably low-density polyethylene.
- the low-density polyethylene may be either high-pressure low-density polyethylene (LDPE) or linear low-density polyethylene (L-LDPE).
- the thickness of the resin layers 10B and 10C constituting the packaging bag 10 is not limited, but is preferably 5 ⁇ m or more and 40 ⁇ m or less, more preferably 7 ⁇ m or more and 35 ⁇ m or less, and further preferably 9 ⁇ m or more and 30 ⁇ m or less.
- the paper thickness is measured in accordance with the provisions of JIS P 8118 (2014).
- the basis weight of the packaging bag 10 is not limited, but is preferably 20 g / m 2 or more and 70 g / m 2 or less, more preferably 25 g / m 2 or more and 65 g / m 2 or less, and further preferably 30 g / m 2 or more and 60 g. It is less than / m 2 .
- the basis weight is measured in accordance with the provisions of JIS P 8124 (2011).
- the thickness of the packaging bag 10 is not limited, but is, for example, 25 ⁇ m or more and 105 ⁇ m or less, preferably 30 ⁇ m or more and 95 ⁇ m or less, and more preferably 45 ⁇ m or more and 80 ⁇ m or less.
- the thickness measured in accordance with the provisions of JIS P 8118 (2014) can be adopted.
- the density of the packaging bag 10 is not limited, but is, for example, 0.1 g / m 3 or more and 1.5 g / m 3 or less 0.3 g / m 3 or more 1.2 g / m 3 or less, more preferably 0.5 g / m. 3 or more and 0.9 g / m 3 or less.
- the density is measured in accordance with JIS P 8118 (2014).
- the tensile strength of the packaging bag 10 is not limited, but is, for example, 1 kN / m or more and 6 kN / m or less, preferably 1.3 kN / m or more and 5.5 kN / in the longitudinal direction of the fiber (flow direction at the time of manufacture or MD direction). It is m or less, more preferably 1.5 kN / m or more and 5 kN / m or less.
- the tensile strength is measured in accordance with the provisions of JIS P 8113 (2006).
- the tear strength of the packaging bag 10 is not limited, but is, for example, 70 mN or more and 350 mN or less, preferably 80 mN or more and 340 mN or less, and more preferably 90 mN or more and 330 mN or less in the longitudinal direction (MD direction) of the fiber. Further, it is 250 mN or more and 950 mN or less in the lateral direction (CD direction), preferably 280 mN or more and 930 mN or less, and more preferably 300 mN or more and 920 mN or less.
- the tear strength is measured in accordance with JIS P 8116 (2000).
- the softness of the packaging bag 10 is not limited, but is, for example, 90 mN / 100 mm or more and 800 mN / 100 mm or less, preferably 110 mN / 100 mm or more and 750 mN / 100 mm or less, more preferably 130 mN / 100 mm or more in the longitudinal direction (MD direction) of the fiber. It is 730 mN / 100 mm or less.
- it is 40 mN / 100 mm or more and 330 mN / 100 mm or less in the lateral direction (CD direction), preferably 50 mN / 100 mm or more and 310 mN / 100 mm or less, and more preferably 60 mN / 100 mm or more and 310 mN / 100 mm or less.
- the softness is measured based on the handle ometer method based on the JIS L 1096 E method.
- the test piece had a size of 100 mm ⁇ 100 mm, and the clearance was 5 mm.
- the softness was measured 5 times each in the vertical direction and the horizontal direction with 1 ply, and the average value of all 10 times was taken as one decimal place and expressed in mN as a unit.
- the packaging bag 10 has a top surface 11, a bottom surface 12, a side surface 13, a side surface 14, a wife surface 15, and a wife surface 16.
- the top surface 11 and the bottom surface 12 face each other in the vertical direction (Z direction)
- the side surface 13 and the side surface 14 face each other in the width direction (Y direction)
- the end surface 15 and the end surface 16 face each other in the longitudinal direction. Facing (X direction).
- the end surfaces 15 and 16 are continuous with any of the top surface 11, the bottom surface 12, the side surface 13, and the side surface 14 (FIGS. 1, 3 to 8).
- the dimensions of the packaging bag 10 are such that the length L1 in the longitudinal direction (X direction) of the packaging bag 10 is about 150 to 250 mm, and the width in the width direction (Y direction) orthogonal to the longitudinal direction (X direction) of the packaging bag 10.
- W1 can be about 70 to 150 mm, and the height H1 in the height direction (Z direction) can be about 20 to 100 mm (see FIGS. 1 and 3).
- the dimensions of the packaging bag 10 indicate the dimensions of the packaging bag 10 in a state where the sheet laminate 20 is housed in the packaging bag 10.
- An outlet 30 extending in the longitudinal direction (X direction) of the packaging bag 10 is formed on the top surface 11 of the packaging bag 10, the top surface 11 side of the end surface 15, and the top surface 11 side of the end surface 16.
- the outlet 30 is formed by a cleavage line 30.
- the cut C and the tie T are alternately arranged, and when the tie T breaks, the cuts C on both sides become continuous cuts. (FIG. 1, FIG. 3, FIG. 7, FIG. 8).
- the cleavage line 30 is composed of linear perforations M in which cuts C and ties T are alternately arranged (FIGS. 1, FIG. 3, FIG. 7, FIG. 8).
- the perforation M is cleaved to form an opening OP on the top surface 11 of the packaging bag 10 from which the sheet S is pulled out (FIG. 15).
- the method for producing the cleavage line 30 is arbitrary, and can be produced by using, for example, the instrument 90 shown in FIG. Specifically, a packaging bag 10 (sheet for packaging bag 10) is arranged between the needle portion 91 and the base portion 92 of the instrument 90, and the tip 91A of the needle portion 91 is pierced toward the receiving groove 92A of the base portion 92. As a result, the cleavage line 30 can be formed.
- the ventilation holes 70 and 80 are formed as shown in FIGS. 1, 5 and 6.
- the ventilation holes 70 and 80 can function as air holes in the packaging bag 10.
- ventilation holes 70 and 80 are not particularly limited.
- ventilation holes 70 are provided on the side surface 13, the end surface 15 and 16 of the packaging bag 10 (FIGS. 1 and 5), and the side surface 14 and the end surface 15 of the packaging bag 10 are provided.
- a vent hole 80 (a plurality of vent holes 81) is provided in 16 (FIG. 6).
- the number of ventilation holes 70 and 80 is not limited. Further, the shapes of the ventilation holes 70 and 80 are not particularly limited, and in the present embodiment, they are circular in a plan view. The dimensions of the ventilation holes 70 and 80 are not particularly limited, and in the present embodiment, the diameter is about 2 mm.
- the method of manufacturing the ventilation holes 70 and 80 is arbitrary, and can be manufactured by using, for example, the instrument 90 shown in FIG. Specifically, a packaging bag 10 (sheet for packaging bag 10) is arranged between the needle portion 91 and the base portion 92 of the instrument 90, and the tip 91A of the needle portion 91 is pierced toward the receiving groove 92A of the base portion 92. As a result, the ventilation holes 70 and 80 can be formed.
- the one in which the receiving groove 92A is not provided in the base portion 92 may be used.
- the shape of the base portion 92 is not limited, and a plate-shaped or cylindrical base portion can be adopted.
- the number of receiving grooves 92A formed in the base portion 92 is not limited, and one may be formed in the base portion 92 or a plurality of receiving grooves 92A may be formed in the base portion 92 at predetermined intervals.
- the packaging form of the packaging bag 10 is not particularly limited, and for example, as shown in FIGS. 9 and 10, a sheet for packaging bag 10 in which resin layers 10B and 10C are laminated on paper layer 10A is processed into a tubular shape.
- the open end of the tubular packaging bag sheet is sealed (sealed), and both ends of the tubular packaging bag 10 sheet are folded and sealed (sealed). (Caramel packaging bag) or a packaging bag combining these can be adopted.
- the tubular packaging bag sheet to be the pillow packaging bag in the present embodiment may be folded into a gusset shape.
- the packaging bag 10 is composed of a pillow packaging bag having at least one sealing portion. Specifically, the sealing portions (end seals) 40 and 50 are formed on the end faces 15 and 16 of the packaging bag 10, and the sealing portions (bottom seals) 60 are formed on the bottom surface 12 of the packaging bag 10 to form the sheet S (bottom seal).
- the sheet laminate 20) is pillow-wrapped.
- the sealing portions 40, 50, and 60 are heat-welded with the resin layers (resin layers 10B and 10C) arranged inside the pillow packaging bag 10.
- heat welding indicates that a part of the packaging bag sheet is heated and a part of the packaging bag sheet is welded to each other.
- the sealing portion 40 in a state where the resin layer 10B laminated on the paper layer 10A is arranged inside the packaging bag 10. 50 and 60 are heat-welded. Further, in the three-layer structure packaging bag (pillow packaging bag) 10 shown in FIG. 10, either the resin layer 10B or the resin layer 10C laminated on the paper layer 10A is arranged inside the packaging bag 10. The sealing portions 40, 50, and 60 are heat-welded.
- the joint pitch S1 of the seal portion 40, the joint pitch S2 of the seal portion 50, and the joint pitch S3 of the seal portion 60 are each preferably 0.5 mm or more and 2 mm or less, more preferably. Is 0.8 mm or more and 1.8 mm or less, more preferably 1.0 mm or more and 1.5 mm or less (FIGS. 11, 12, and 13).
- the joining pitch is a portion (convex portions 41, 51, 61) to be bonded in a convex shape when viewed from one side of the sealing portions 40, 50, 60 (for example, the bottom surface 12 side of the packaging bag 10).
- the spacing in a predetermined direction (the width direction (Y direction) of the packaging bag 10 for the sealing portions 40 and 50, and the longitudinal direction (X direction) of the packaging bag 10 for the sealing portion 60) is shown.
- the packaging bag 10 of the present embodiment as described above, the resin layer 10B or the resin layer 10B and the resin layer 10C containing the thermoplastic resin provided on at least one surface of the paper layer 10A containing the paper component are provided.
- the packaging bag 10 can be softened.
- the resin layer provided on at least one surface of the paper layer 10A contains a thermoplastic resin, so that the resin layer (resin layer) is used when the packaging bag 10 is sealed (or sealed).
- the resin layer resin layer
- the melted resin layer resin layer 10B or resin layer 10B, 10C
- the packaging bag 10 has an adhesive function. Easy to seal.
- the ratio of the paper component in the packaging bag 10 is 50% or more, the environmental load can be suppressed.
- the strength of the packaging bag 10 can be maintained by setting the basis weight of the paper layer 10A to 10 g / m 2 or more and 40 g / m 2 or less. Therefore, according to the present embodiment, it is possible to provide a packaging bag 10 that is more resistant to breakage.
- the strength of the packaging bag 10 can be maintained while suppressing the stiff feeling of the packaging bag 10.
- the thickness of the resin layer (resin layer 10B or resin layer 10B, 10C) 5 ⁇ m or more and 40 ⁇ m or less, the ratio of the paper component in the packaging bag is maintained at 50% or more. It will be easier. Further, it is possible to maintain the adhesive function of the resin layer (resin layer 10B or resin layer 10B, 10C) at the time of sealing the packaging bag while suppressing the feeling of stiffness of the packaging bag.
- the feeling of stiffness of the packaging bag 10 is further suppressed.
- the adhesive function of the resin layer (resin layer 10B or resin layer 10B, 10C) at the time of sealing the packaging bag 10 can be improved.
- At least 1 is provided in a state where the packaging bag 10 is a pillow packaging bag and the resin layer (resin layer 10B or resin layer 10B, 10C) is arranged inside the pillow packaging bag 10.
- the resin layer resin layer 10B or resin layer 10B, 10C
- the adhesive function of the resin layer can be effectively utilized, so that the pillow packaging bag 10 having a high sealing property can be obtained.
- the bonding pitch of the sealing portions is set to 0.5 mm or more and 2 mm or less, so that the resin layer (resin layer 10B, Alternatively, the adhesive function of the resin layers 10B and 10C) can be enhanced, and a pillow packaging bag 10 having a higher sealing property can be obtained.
- the sheet package 100 is stored or transported during storage or transportation.
- the packaging bag is less likely to burst.
- the packaging bag 10 can be opened only by cleaving the cleaving cut line 30. Further, the cleaved cut line 30 that has been cleaved can form an outlet 30 (opening OP) of the packaging bag 10. Further, in the present embodiment, the cleavage line 30 is provided in the packaging bag 10 to which the followability is imparted by laminating the resin layer (resin layer 10B or resin layer 10B, 10C) on the paper layer 10A. Therefore, it is easy to cleave the cleavage line 30.
- the method for manufacturing a packaging bag according to the present embodiment is the method for manufacturing the above-mentioned packaging bag 10. Specifically, it has a welding step of heat welding the sealing portions 40, 50, 60 of the packaging bag 10. In the welding step, heat welding is performed at a heating temperature of 140 ° C. or higher and 180 ° C. or lower, preferably 140 ° C. or higher and 170 ° C. or lower, and more preferably 140 ° C. or higher and 160 ° C. or lower. As the process other than the welding process, the process used in the conventional method for manufacturing a resin film packaging bag can be adopted.
- the heating temperature is set to 140 ° C. or higher and 180 ° C. or lower in the welding step of heat-welding the sealed portions (sealed portions 40, 50, 60) of the packaging bag 10. Even when the packaging bag is made into paper as described above, the packaging bag 10 having a high sealing property can be obtained.
- the sheet package according to the present embodiment includes the above-mentioned packaging bag 10 and the sheet S housed in the packaging bag 10.
- the sheet package according to the present embodiment can be composed of the sheet package 100 having the above-mentioned packaging bag 10 and the sheet laminate 20 (plural sheets S).
- the same effect as the above-mentioned packaging bag 10 can be obtained by forming the sheet packaging body 100 in which the sheet S (sheet laminate 20) is housed in the above-mentioned packaging bag 10. That is, according to the present embodiment, even when the packaging bag is made into paper, it is possible to provide the sheet packaging body 100 in which the packaging bag 10 is not easily broken during manufacturing or transportation.
- the melted resin layer (resin layer 10B, 10C) is used as an adhesive by heating the resin layer (resin layer 10B, 10C) when the packaging bag 10 is sealed (or sealed). Since it can function (has an adhesive function), it is possible to obtain a sheet package 100 in which the packaging bag 10 can be easily sealed.
- the ratio of the paper component in the packaging bag 10 is 50% or more, the sheet package 100 that suppresses the environmental load can be obtained.
- a sheet package 100 in which a plurality of sheets S (sheet laminate 20) were pillow-wrapped in a package bag 10 was prepared (FIGS. 1 to 8).
- the sheet laminate 20 is a paper towel laminated with the sheet S folded (trade name "Elver Eco Dry (medium size)", manufactured by Daio Paper Corporation, 200 pairs, height H1: 65 mm, length L1: 210 mm, width (depth) W1: 115 mm, basis weight 33 g / m 2 , paper thickness 180 ⁇ m) was used.
- Paper thickness The paper thickness (thickness) of the packaging bag 10 in the test piece was measured in accordance with the provisions of JIS P 8118 (2014). The unit of thickness is ⁇ m.
- the density of the packaging bag 10 in the test piece was measured in accordance with JIS P 8118 (2014).
- the unit of density is g / m 3 .
- a tear strength tester (Elmendorf tear degree tester (digital display type) manufactured by Kumagai Riki Kogyo Co., Ltd.) was used in accordance with the provisions of JIS P 8116 (2000). The tear strength in the vertical direction (MD direction) and the horizontal direction (CD direction) was measured.
- the softness of the packaging bag 10 of the test piece was measured according to the handle ometer method according to the JIS L 1096 E method.
- the test piece had a size of 100 mm ⁇ 100 mm, and the clearance was 5 mm.
- the measurement was performed 5 times each in the table / vertical direction (MD direction) and in the table / horizontal direction (CD direction), and the average value of all 10 times was expressed in mN / 100 mm as a unit.
- the softness was measured based on the handle ometer method according to the JIS L 1096 E method. However, the test piece had a size of 100 mm ⁇ 100 mm, and the clearance was 5 mm.
- the softness is measured using a handle omimeter (manufactured by Kumagai Riki Kogyo Co., Ltd., touch measuring instrument) 5 times each in the vertical and horizontal directions with 1 ply, and the average value of all 10 times is the decimal point. It was expressed as one digit and expressed in mN as a unit.
- Heat seal strength The heat seal strength of the packaging bag 10 of the test piece was confirmed.
- the heat seal strength was measured at 120 ° C, 140 ° C, 160 ° C, and 180 ° C, respectively.
- the heat seal strength is measured in the vertical direction with a length of 300 mm and in the horizontal direction using a load cell tensile tester (A & D, Tensilon RTG-1210) and a thermal tilt tester (Toyo Seiki, TYPE HG-100). Fold the test piece with a width of 120 mm inward in the vertical direction with the heat-sealed surface inside, and seal the test piece with a thermal tilt tester.
- the test is performed at four levels of a load of 1.0 kgf, a time of 1.0 second, and a temperature setting of 120 ° C, 140 ° C, 160 ° C, and 180 ° C.
- the heat block consists of 5 blocks (5 blocks side by side) with a width of 1.0 cm and a length of 2.5 cm, and the load is even.
- a test piece for heat-sealing strength measurement is collected from the heat-sealed test piece.
- the test piece has a width of about 1.5 cm and a length of about 15 cm and includes one heat block of the heat seal portion.
- a tensile test is performed by setting both ends of the test piece so that the heat-sealed portion is arranged at the center of the test piece with a chucking distance of 100 mm of the load cell tensile tester.
- End seal Regarding the test piece, it was confirmed whether the end seal (seal parts 40, 50) was torn when the end seal (seal parts 40, 50) was picked and spread in the longitudinal direction (X direction) of the test piece. The evaluation of the end seal was ⁇ (good) when the end seal was not torn, and ⁇ (bad) when the end seal was torn.
- the paper layer 10A is composed of kraft paper having a basis weight of 30 g / m 2
- the resin layer 10B is composed of 15 ⁇ m low-density polyethylene.
- Table 1 shows the vertical, horizontal, elongation, tear strength, softness, heat seal strength, paper conversion rate, end seal, bottom seal, breakage, air holes, and perforations of rice tsubo, paper thickness, density, and tensile strength. ..
- Example 2 Except for the three-layer structure in which the paper layer 10A is composed of kraft paper having a basis weight of 30 g / m 2 , the resin layer 10B is composed of 12 ⁇ m low-density polyethylene, and the resin layer 10C is composed of 20 ⁇ m low-density polyethylene. It was measured and evaluated in the same manner as in Example 1. The results are shown in Table 1.
- Example 3 The measurement and evaluation were carried out in the same manner as in Example 2 except that the thickness of the resin layer 10B was 15 ⁇ m and the thickness of the resin layer 10C was 15 ⁇ m. The results are shown in Table 1.
- Example 4 The measurement and evaluation were carried out in the same manner as in Example 1 except that the thickness of the resin layer 10B was set to 30 ⁇ m. The results are shown in Table 1.
- Example 5 The measurement and evaluation were carried out in the same manner as in Example 1 except that the thickness of the resin layer 10B was 11 ⁇ m. The results are shown in Table 1.
- Example 6 The measurement and evaluation were carried out in the same manner as in Example 1 except that the basis weight of the paper layer 10A was 20 g / m 2 and the thickness of the resin layer 10B was 11 ⁇ m. The results are shown in Table 1.
- Example 7 The evaluation was carried out in the same manner as in Example 1 except that the paper layer 10A was composed of rayon paper having a basis weight of 30 g / m 2 . The results are shown in Table 1.
- Example 8 The measurement and evaluation were carried out in the same manner as in Example 7 except that the thickness of the resin layer 10B was 11 ⁇ m. The results are shown in Table 1.
- Example 9 The measurement and evaluation were carried out in the same manner as in Example 7 except that the thickness of the resin layer 10B was 20 ⁇ m. The results are shown in Table 1.
- Example 10 The measurement and evaluation were carried out in the same manner as in Example 7 except that the basis weight of the paper layer 10A was 20 g / m 2 and the thickness of the resin layer 10B was 11 ⁇ m. The results are shown in Table 1.
- the paper layer 10A has a one-layer structure composed of kraft paper having a basis weight of 20 g / m 2 .
- Table 1 shows the vertical, horizontal, elongation, tear strength, softness, heat seal strength, paper conversion rate, end seal, bottom seal, breakage, air holes, and perforations of rice tsubo, paper thickness, density, and tensile strength. ..
- Comparative Example 2 The measurement and evaluation were carried out in the same manner as in Comparative Example 1 except that the basis weight of the paper layer 10A was 30 ⁇ m. The results are shown in Table 1.
- Comparative Example 3 The measurement and evaluation were carried out in the same manner as in Comparative Example 1 except that the basis weight of the paper layer 10A was 40 ⁇ m. The results are shown in Table 1.
- Comparative Example 5 The evaluation was carried out in the same manner as in Comparative Example 1 except that the paper layer 10A was composed of rayon paper having a basis weight of 20 g / m 2 . The results are shown in Table 1.
- Comparative Example 6 The evaluation was carried out in the same manner as in Comparative Example 5 except that the basis weight of the paper layer 10A was 30 ⁇ m. The results are shown in Table 1.
- the test piece provided with the resin layer 10B or the resin layers 10B and 10C on the paper layer 10A and having the packaging bag 10 having a paper component ratio of 50% or more includes an end seal, a bottom seal, a break, an air hole, and the like. All of the perforations were good (Examples 1 to 10). On the other hand, in the test piece having the packaging bag composed of only the paper layer 10A, at least one of the end seal, the bottom seal, the breakage, and the perforation was not good (Comparative Examples 1 to 6).
- the packaging bag for accommodating the sheet has a paper layer containing a paper component and a resin layer containing a thermoplastic resin provided on at least one surface of the paper layer. It was found that the packaging bag in which the ratio of the paper component in the packaging bag is 50% or more is not easily broken even if it is made into paper.
- a first aspect of the present invention is a packaging bag for accommodating a sheet, which comprises a paper layer containing a paper component and a resin layer containing a thermoplastic resin provided on at least one surface of the paper layer. , And the ratio of the paper component in the packaging bag is 50% or more.
- the resin layer provided on at least one surface of the paper layer is a two-layer structure in which the resin layer is provided on one side of the paper layer, or the resin layer is laminated on both sides of the paper layer 3 Indicates one of the layered structures.
- the packaging bag can be softened by having the resin layer containing the thermoplastic resin provided on at least one surface of the paper layer containing the paper component.
- the resin layer provided on at least one surface of the paper layer contains a thermoplastic resin to heat the resin layer when sealing (or sealing) the packaging bag. Since the melted resin layer can function as an adhesive (has an adhesive function), the packaging bag can be easily sealed. Further, in the first aspect, since the ratio of the paper component in the packaging bag is 50% or more, the environmental load can be suppressed.
- a second aspect according to the present invention is a packaging bag in which the basis weight of the paper layer is 10 g / m 2 or more and 40 g / m 2 or less.
- the strength of the packaging bag can be maintained by setting the basis weight of the paper layer to 10 g / m 2 or more and 40 g / m 2 or less. Therefore, according to the second aspect, it is possible to provide a packaging bag that is more resistant to breakage.
- the third aspect according to the present invention is a packaging bag in which the paper layer is made of kraft paper or rayon paper.
- kraft paper refers to paper made from kraft pulp.
- the rayon paper indicates a kraft pulp blended with rayon fiber made by chemically synthesizing wood pulp or the like.
- the rayon paper preferably contains 20% or less by mass ratio of rayon fibers from the viewpoint of achieving both softness and strength of the packaging bag.
- the strength of the packaging bag can be maintained while suppressing the stiffness of the packaging bag.
- a fourth aspect according to the present invention is a packaging bag in which the thickness of the resin layer is 5 ⁇ m or more and 40 ⁇ m or less.
- the thickness of the resin layer is 5 ⁇ m or more and 40 ⁇ m or less.
- a fifth aspect of the present invention is a packaging bag in which the thermoplastic resin is low-density polyethylene.
- the thermoplastic resin is low-density polyethylene.
- a sixth aspect according to the present invention is a pillow packaging bag in which the packaging bag has at least one sealing portion, and the sealing portion is heat-welded in a state where the resin layer is arranged inside the pillow packaging bag. It is a packaging bag.
- the pillow packaging bag refers to a packaging bag in which the open end of a tubular packaging bag sheet is sealed (sealed). Heat welding indicates that a part of the packaging bag sheet is heated and a part of the packaging bag sheet is welded to each other.
- the resin layers are adhered to each other by heat-welding at least one sealing portion in a state where the packaging bag is a pillow packaging bag and the resin layer is arranged inside the pillow packaging bag. Can be done.
- the adhesive function of the resin layer can be effectively used, so that a pillow packaging bag having a high sealing property can be obtained.
- a seventh aspect according to the present invention is a packaging bag in which the joining pitch of the sealing portion is 0.5 mm or more and 2 mm or less.
- the joining pitch refers to the distance between the portions to be bonded in a convex shape when viewed from one side of the sealing portion in a predetermined direction.
- the adhesive function of the resin layer provided on the paper layer can be enhanced, and a pillow packaging bag having higher sealing property can be obtained. Be done.
- the eighth aspect according to the present invention is a packaging bag in which ventilation holes are formed.
- the packaging bag by providing the packaging bag with ventilation holes, the packaging bag is less likely to burst during storage or transportation of the sheet package.
- the ninth aspect according to the present invention is a packaging bag in which a cut line for cleavage is formed.
- the cut line for cleavage indicates a cut line in which cuts and ties (uncut portions between two cuts) are alternately arranged, and when the ties are broken, the cuts on both sides become continuous cuts.
- the packaging bag by providing the packaging bag with a tear line for cleavage, the packaging bag can be opened only by opening the cut line for cleavage. Further, the cleaved cut line can form an outlet of the packaging bag. Further, in the ninth aspect, since the wrapping bag to which the resin layer is laminated on the paper layer is provided with the ripping cut line, the ripping cut line is easily cleaved. ..
- a tenth aspect of the present invention is the method for manufacturing a packaging bag according to the first to ninth aspects, which comprises a welding step of heat-welding the sealed portion of the packaging bag, and the heating temperature in the welding step.
- a method for manufacturing a packaging bag wherein the temperature is 140 ° C. or higher and 180 ° C. or lower.
- the heating temperature is set to 140 ° C. or higher and 180 ° C. or lower in the welding step of heat-welding the sealed portion of the packaging bag, so that the packaging has a high sealing property even when the packaging bag is made into paper as described above. You can get a bag.
- the eleventh aspect according to the present invention is a sheet package having a packaging bag according to the first to ninth aspects and a sheet housed in the packaging bag.
- the same effect as that of the above-mentioned packaging bag can be obtained by constructing the sheet packaging body in which the sheet is housed in the above-mentioned packaging bag. That is, according to the eleventh aspect, even when the packaging bag is made into paper, it is possible to provide a sheet package in which the packaging bag is not easily broken during manufacturing or transportation.
- the melted resin layer can function as an adhesive (has an adhesive function), so that the packaging bag has an adhesive function.
- a sheet package that can be easily sealed can be obtained.
- the ratio of the paper component in the packaging bag is 50% or more, a sheet package that suppresses the environmental load can be obtained.
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Abstract
Description
本発明の実施の形態について、図面を参照しながら詳細に説明する。各図において、共通する部分は、同一の符号を付して説明を省略する場合がある。また、各図において、各部材の縮尺は実際とは異なる場合がある。なお、各図では、3軸方向(X方向、Y方向、Z方向)の3次元直交座標系を用い、包装袋の長手方向をX方向とし、幅方向をY方向とし、高さ方向(上下方向または厚み方向)をZ方向とする。
本実施形態に係る包装袋の製造方法は、上述の包装袋10を製造する方法である。具体的には、包装袋10のシール部40、50、60を熱溶着する溶着工程を有する。溶着工程では、加熱温度を140℃以上180℃以下、好ましくは140℃以上170℃以下、より好ましくは140℃以上160℃以下にして熱溶着が行われる。なお、溶着工程以外の工程については、従来の樹脂フィルムの包装袋を製造する方法で用いられる工程を採用することができる。
本実施形態に係るシート包装体は、上述の包装袋10と、包装袋10に収容されたシートSと、を有する。具体的には、本実施形態に係るシート包装体は、上述の包装袋10及びシート積層体20(複数枚のシートS)を有するシート包装体100で構成することができる。
試験体として、複数枚のシートS(シート積層体20)が包装袋10にピロー包装されたシート包装体100を用意した(図1~図8)。シート積層体20は、シートSが折りたたまれた状態で積層されたペーパータオル(商品名「エルヴェール エコドライ(中判)」、大王製紙株式会社製、200組、高さH1:65mm、長さL1:210mm、幅(奥行)W1:115mm、坪量33g/m2、紙厚180μm)を用いた。
試験体における包装袋10の米坪(坪量)を、JIS P 8124(2011)の規定に準拠して測定した。米坪の単位は、g/m2である。
試験体における包装袋10の紙厚(厚み)を、JIS P 8118(2014)の規定に準拠して測定した。厚みの単位は、μmである。
試験体における包装袋10の密度を、JIS P 8118(2014)の規定に準拠して測定した。密度の単位は、g/m3である。
試験体における包装袋10について、JIS P 8113(2006)の規定に準拠して、テンシロン万能試験機(A&D社製、RTG-1210)を使用し、縦方向(MD方向)と横方向(CD方向)の引張強度(mN)を測定した。
試験体における包装袋10について、JIS P 8113(2006)の規定に準拠して、テンシロン万能試験機(A&D社製、RTG-1210)を使用し、縦方向(MD方向)と横方向(CD方向)の伸び(%)を測定した。
試験体における包装袋10について、JIS P 8116(2000)の規定に準拠して、引裂強度試験機(熊谷理機工業社製、エルメンドルフ引裂度試験機(デジタル表示式))を使用し、繊維の縦方向(MD方向)と横方向(CD方向)の引裂強度を測定した。
試験体の包装袋10について、JIS L 1096 E法に準じたハンドルオメータ法に従ってソフトネスを測定した。試験片は100mm×100mmの大きさとし、クリアランスは5mmとした。測定は、表・縦方向(MD方向)、表・横方向(CD方向)の各々5回ずつ測定し、その全10回の平均値を、mN/100mmを単位として表した。なお、ソフトネスは、JIS L 1096 E法に準じたハンドルオメータ法に基づいて測定した。但し、試験片は100mm×100mmの大きさとし、クリアランスは5mmで実施した。ソフトネスの測定は、ハンドルオメータ(熊谷理機工業社製、手触り測定器)を用いて、1プライで縦方向、横方向の各々5回ずつ測定し、その全10回の平均値を小数点1桁とし、mNを単位として表した。
試験体の包装袋10について、ヒートシール強度を確認した。ヒートシール強度は、120℃、140℃、160℃、180℃についてそれぞれ測定した。ヒートシール強度の測定は、ロードセル引張試験器(A&D社製、テンシロンRTG-1210)、および熱傾斜試験機(東洋精機製、TYPE HG-100)を用いて、縦方向に長さ300mm、横方向に幅120mmの試験片を、ヒートシール面を内側にして縦方向の内側に折り、熱傾斜試験器で試験片をシールする。このとき、荷重は1.0kgf、時間は1.0秒、温度設定は120℃、140℃、160℃、180℃の4水準で試験をする。ヒートブロックは幅1.0cm、長さ2.5cmのブロックを5個(横並びで5連)で荷重は均等とする。ヒートシールした試験片からヒートシール強度測定用の試験片を採取する。試験片は幅1.5cm×長さ15cm程度としヒートシール部のヒートブロック1個分を含む。試験片の両端部を、ロードセル引張試験機のチャッキング間を100mmとして、試験片の中央部にヒートシール部が配置されるようにセットして引張試験を行う。
試験体の包装袋10について、紙成分の比率を紙化率(%)として算出した。なお、樹脂層(ポリエチレン)の重量は比重とフィルム厚から算出した。
試験体について、エンドシール(シール部40、50)を摘まみ、試験体の長手方向(X方向)に広げたときに、エンドシール(シール部40、50)が破れるかを確認した。エンドシールの評価は、エンドシールが破れなかった場合は〇(良好)、エンドシールが破れた場合は×(不良)、と評価した。
試験体について、ボトムシール(シール部60)のエンドシール(シール部40、50)側をそれぞれ摘まみ、試験体の長手方向(X方向)に広げたときに、ボトムシール(シール部60)が破れるかを確認した。ボトムシールの評価は、ボトムシールが破れなかった場合は〇(良好)、ボトムシールが破れた場合は×(不良)、と評価した。
試験体を天面11と底面12から手で圧縮させ、包装袋10が破れるかを確認した。破断の評価は、包装袋10、シール部40、50、60のいずれも破れなければ○(優良)、包装袋10、シール部40、50、60のいずれも破れないが柔軟性がない場合は△(良好)、シール部40、50、60のいずれかが破れたら×(不良)、と評価した。
試験体に空気穴(通気孔70、80)が形成できるかを確認した。空気穴の評価は、通気孔70、80が容易に形成できた場合は〇(優良)、通気孔70、80が形成できるが形成しにくい場合は△(良好)、通気孔70、80が形成できない場合は×(不良)、と評価した。
試験体の包装袋10の天面11にミシン目M(開裂用切目線30)が形成できるかを確認した。ミシン目の評価は、ミシン目Mが容易に形成できた場合は〇(優良)、ミシン目Mが形成できるが形成しにくい場合は△(良好)、ミシン目Mが形成できない場合は×(不良)、と評価した。
試験体(シート包装体100)の包装袋10において、紙層10Aを坪量30g/m2のクラフト紙で構成し、樹脂層10Bを15μmの低密度ポリエチレンで構成した2層構造とした。米坪、紙厚、密度、引張強度の縦、横、伸び、引裂強度、ソフトネス、ヒートシール強度、紙化率、エンドシール、ボトムシール、破断、空気穴、ミシン目を、表1に示す。
紙層10Aを坪量30g/m2のクラフト紙で構成し、樹脂層10Bを12μmの低密度ポリエチレンで構成し、樹脂層10Cを20μmの低密度ポリエチレンで構成した3層構造とした以外は、実施例1と同様に測定、評価した。結果を表1に示す。
樹脂層10Bの厚みを15μmとし、樹脂層10Cの厚みを15μmとした以外は、実施例2と同様に測定、評価した。結果を表1に示す。
樹脂層10Bの厚みを30μmとした以外は、実施例1と同様に測定、評価した。結果を表1に示す。
樹脂層10Bの厚みを11μmとした以外は、実施例1と同様に測定、評価した。結果を表1に示す。
紙層10Aの坪量を20g/m2とし、樹脂層10Bの厚みを11μmとした以外は、実施例1と同様に測定、評価した。結果を表1に示す。
紙層10Aを坪量30g/m2のレーヨン紙で構成した以外は、実施例1と同様に評価した。結果を表1に示す。
樹脂層10Bの厚みを11μmとした以外は、実施例7と同様に測定、評価した。結果を表1に示す。
樹脂層10Bの厚みを20μmとした以外は、実施例7と同様に測定、評価した。結果を表1に示す。
紙層10Aの坪量を20g/m2とし、樹脂層10Bの厚みを11μmとした以外は、実施例7と同様に測定、評価した。結果を表1に示す。
試験体(シート包装体100)の包装袋10において、紙層10Aを坪量20g/m2のクラフト紙で構成した1層構造とした。米坪、紙厚、密度、引張強度の縦、横、伸び、引裂強度、ソフトネス、ヒートシール強度、紙化率、エンドシール、ボトムシール、破断、空気穴、ミシン目を、表1に示す。
紙層10Aの坪量を30μmとした以外は、比較例1と同様に測定、評価した。結果を表1に示す。
紙層10Aの坪量を40μmとした以外は、比較例1と同様に測定、評価した。結果を表1に示す。
シール部40、50、60を接着剤でシールした以外は、比較例1と同様に測定、評価した。結果を表1に示す。
紙層10Aを坪量20g/m2のレーヨン紙で構成した以外は、比較例1と同様に評価した。結果を表1に示す。
紙層10Aの坪量を30μmとした以外は、比較例5と同様に評価した。結果を表1に示す。
10 包装袋
10A 紙層
10B、10C 樹脂層
11 天面
12 底面
13、14 側面
15、16 妻面
20 シート積層体
S シート
SL 積層体
30 開裂用切目線(取出口)
OP 開口
40、50 シール部(エンドシール)
41、51 凸部
60 シール部(ボトムシール)
61 凸部
70、71、80、81 通気孔(空気穴)
90 器具
91 針部
91A 先端
92 台部
92A 受溝
L1、L2 長さ
W1、W2 幅
H1、H2 高さ
S1、S2、S3 接合ピッチ
Claims (11)
- シートを収容する包装袋であって、
紙成分を含む紙層と、
前記紙層の少なくともいずれか一方の面に設けられた熱可塑性樹脂を含む樹脂層と、を有し、
前記包装袋における前記紙成分の比率が50%以上である、
包装袋。 - 前記紙層の坪量が10g/m2以上40g/m2以下である、
請求項1に記載の包装袋。 - 前記紙層がクラフト紙またはレーヨン紙で形成されている、
請求項1または2に記載の包装袋。 - 前記樹脂層の厚みが5μm以上40μm以下である、
請求項1乃至3のいずれか一項に記載の包装袋。 - 前記熱可塑性樹脂が低密度ポリエチレンである、
請求項1乃至4のいずれか一項に記載の包装袋。 - 前記包装袋が少なくとも1つのシール部を有するピロー包装袋であり、
前記樹脂層が前記ピロー包装袋の内側に配置された状態で、前記シール部が熱溶着されている、
請求項1乃至5のいずれか一項に記載の包装袋。 - 前記シール部の接合ピッチが、0.5mm以上2mm以下である、
請求項6に記載の包装袋。 - 通気孔が形成されている、
請求項1乃至7のいずれか一項に記載の包装袋。 - 開裂用切目線が形成されている、
請求項1乃至8のいずれか一項に記載の包装袋。 - 請求項1乃至9のいずれか一項に記載の包装袋の製造方法であって、
前記包装袋のシール部を熱溶着する溶着工程を有し、
前記溶着工程における加熱温度が140℃以上180℃以下である、
包装袋の製造方法。 - 請求項1乃至9のいずれか一項に記載の包装袋と、
前記包装袋に収容されたシートと、を有する、
シート包装体。
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