US20240199310A1 - Packaged product - Google Patents

Packaged product Download PDF

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Publication number
US20240199310A1
US20240199310A1 US18/555,749 US202218555749A US2024199310A1 US 20240199310 A1 US20240199310 A1 US 20240199310A1 US 202218555749 A US202218555749 A US 202218555749A US 2024199310 A1 US2024199310 A1 US 2024199310A1
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United States
Prior art keywords
dispenser
port
dimension
width direction
forming region
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Pending
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US18/555,749
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English (en)
Inventor
Hirohiko Kato
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daio Paper Corp
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Daio Paper Corp
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Assigned to DAIO PAPER CORPORATION reassignment DAIO PAPER CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KATO, HIROHIKO
Publication of US20240199310A1 publication Critical patent/US20240199310A1/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • 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
    • B65D75/52—Details
    • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
    • B65D75/5827—Tear-lines provided in a wall portion
    • B65D75/5833—Tear-lines provided in a wall portion for tearing out a portion of the wall
    • B65D75/5844—Tear-lines provided in a wall portion for tearing out a portion of the wall the portion of the wall being a narrow strip, e.g. between lines of weakness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/08—Containers or packages with special means for dispensing contents for dispensing thin flat articles in succession
    • B65D83/0805—Containers or packages with special means for dispensing contents for dispensing thin flat articles in succession through an aperture in a wall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/08—Containers or packages with special means for dispensing contents for dispensing thin flat articles in succession
    • B65D83/0894—Containers or packages with special means for dispensing contents for dispensing thin flat articles in succession the articles being positioned relative to one another or to the container in a special way, e.g. for facilitating dispensing, without additional support

Definitions

  • the present invention relates to a packaged product in which sheets of sanitary tissue paper, such as paper towels, are folded and stacked into a bundle and packaged with a flexible packaging film.
  • sanitary tissue paper such as paper towels and facial tissues
  • interfold and stack sheets each having a single or a plurality of plies into a so-called pop-up-type bundle so that picking up and withdrawal of the topmost sheet leads to withdrawal of part of the subsequent sheet, and to wrap the bundle with a flexible packaging film made of resin.
  • such a packaged product of sanitary tissue paper typically has a perforated line in the form of a simple straight line for forming a dispenser port, so that a slit-like dispenser port is formed in the top face of the product.
  • a slit-like dispenser port has problems in that a longer slit may cause fall back of the sheets inside the package when the number of sheets remaining in the package becomes small, whereas a shorter slit may cause difficulties in dispensing the first sheet after opening the package, or may cause too high a removal resistance of a sheet in the beginning or the end of use, so that the package is lifted up with the sheet and cannot allow the subsequent sheets to pop up.
  • the perforated line for forming a dispenser port is arranged in a longitudinally-elongated circular form by means of a die-cutting technique to broaden the dimension of the opening of the dispenser port in the depth direction, to be like an ellipse (see Patent Publications 1 and 2 below).
  • the dispenser port is formed in an approximate gourd shape with its ends in the width direction enlarged for further improving withdrawability.
  • dispenser ports in the approximate elliptical shape or the approximate gourd shape are mainly designed for sanitary tissue paper like facial tissues, which are mainly in facial use, such as for blowing your nose or wiping your mouth at meals, and of which softness and pliancy are valued.
  • the dispenser ports of such shapes are not always suitable for sanitary tissue paper, such as tissues having utility in wiping your skin other than face skin or cleaning up goods, with “qualities of strength, thickness, and resistance to tear”, or paper towels which have a higher stiffness compared to that of facial tissues, and mainly used for wiping your hands after washing.
  • sanitary tissue paper sheets For improving withdrawability of such sanitary tissue paper sheets, it is conceivable to broaden the dimension in the depth direction of the dispenser port.
  • a dispenser port for the stiff sanitary tissue paper is difficult to be designed in the same way as facial tissues, which are excellent in softness and pliancy, due to difference in paper quality.
  • Simply broadening the dimension in the depth direction of the dispenser port very likely leads to pop-up failure, wherein, in the pop-up action, the subsequent sheet of sanitary tissue paper is not pulled up but falls back, or stand-up failure, wherein the sanitary tissue paper sheets cannot stand up from the top face of the package but falls back.
  • a dispenser-port-forming region 105 formed by disposing a perforated line 150 in a loop by means of a die-cutting technique has an advantage in that a dispenser port may be formed easily by tearing and peeling the region 105 Z of the packaging film bounded by the looped easy-tear line from one end 105 A toward the other end 105 B in the longitudinal direction X as shown in FIG. 9 ( b ) .
  • dispenser-port-forming regions 105 are broadened in the depth direction Y, which broadens the range of the perforations oriented closer to the perpendicular to the direction of the tearing and peeling. Accordingly, dispenser-port-forming regions, such as those in an approximate gourd shape having enlarged ends, are prone to ripping 105 P.
  • the packaging film is a unitary oriented film stretched in the direction Y perpendicular to the longitudinal direction X of the dispenser-port-forming region 105 , such ripping 105 P is more prone to occur.
  • the longitudinal direction (machine direction: MD) of the packaging film is usually aligned to the longitudinal direction of the dispenser-port-forming region, so that such ripping is prone to occur.
  • the first aspect is a packaged product including a flexible packaging film made of resin, and a bundle of sanitary tissue paper packaged therewith,
  • the second aspect is the packaged product according to the first aspect
  • the third aspect is the packaged product according to the second aspect
  • the fourth aspect is the packaged product according to the second aspect
  • the fifth aspect is the packaged product according to any one of the second to the fourth aspects,
  • a film-packaged product which is hard to be ripped on an end in the width direction of the dispenser port upon opening the dispenser port and thus has excellent openability, and which has excellent withdrawability of sheets of sanitary tissue paper, in particular, stiff sanitary tissue paper, such as paper towel.
  • FIG. 1 is a perspective view for explaining a packaged product according to the present invention.
  • FIG. 2 is a perspective view for explaining a bundle of sanitary tissue paper.
  • FIG. 3 is a top view for explaining a dispenser-port-forming region.
  • FIG. 4 is a perspective view for explaining state of use of the packaged product according to the present invention.
  • FIG. 5 shows partially enlarged views for explaining a dispenser-port-forming region.
  • FIG. 6 shows partially enlarged views for explaining other embodiments of the dispenser-port-forming region.
  • FIG. 7 illustrates another embodiment of the shape of the dispenser-port-forming region.
  • FIG. 8 illustrates another embodiment of the dispenser-port-forming region.
  • FIG. 9 shows views for explaining a conventional dispenser-port-forming region.
  • directions such as the top-bottom direction and the right-left direction, vary depending on the orientation of the packaged product, and do not mean absolute spatial directions. Stiffness may also be termed flexural rigidity of paper.
  • the packaged product 1 is obtained by packaging a bundle 3 of generally a cuboid shape, which is formed by interfolding and stacking sheets of sanitary tissue paper 2 , such as paper towels, with a flexible packaging film 4 , and has a dispenser-port-forming region 5 formed in its top face 4 C.
  • This packaged product 1 is generally in the form of a hexahedron having a top face 4 C, a bottom face 4 D opposite from the top face 4 C, and longitudinal side faces 4 B and transverse side faces 4 A located between the top face 4 C and the bottom face 4 D, to approximate the shape of the bundle 3 .
  • FIGS. 1 to 4 show an embodiment in gusset wrapping.
  • the gusset wrapping according to this embodiment is a pillow wrapping with gussets, and is performed by cylindrically wrapping the bundle 3 , which is an object of packaging, with the packaging film 4 so that an opening is formed on each longitudinal end; adhering, by heat-sealing or bonding with an adhesive, a portion 4 X overlapped in the wrapping direction on the bottom face or the like of the bundle 3 ; gusseting each portion extending beyond the shorter side face 3 A of the bundle 3 ; and adhering the end edge in the top-bottom direction by heat-sealing or bonding with an adhesive to form the transverse side face 4 A as a sealed face.
  • the sealed faces which are the transverse side faces 4 A of this gusset wrapping, face the shorter side faces 3 A of the bundle 3
  • the longitudinal side faces 4 B which are the gussets, face the longer side faces 3 B having the folds, of the bundle 3 .
  • the packaged product 1 may have been packaged in any suitable packaging configuration, such as simple pillow wrapping without the gussets, or overlap wrapping such as shown in FIG. 7 formed by sealing flaps placed one on top of the other in each transverse side face 4 A, which is also referred to as caramel wrapping.
  • the bundle 3 of the sanitary tissue paper 2 contained in the packaged product 1 according to the present invention is of a so-called pop-up type. As shown particularly in FIG. 2 , this bundle 3 is formed by folding a rectangular tissue paper sheet 2 in half, and placing, inside 2 A the folded tissue paper sheet, folded halves 2 B of the other tissue paper sheets 2 arranged above and below, so that a plurality of tissue paper sheets 2 is interfolded and stacked to form an approximate cuboid shape having a pair of longer side faces 3 B, in each of which the folded edges 2 C of the tissue paper sheets 2 are arranged, a pair of shorter side faces 3 A, in each of which the folded edges 2 C are not arranged, and a pair of planes (top and bottom faces) 3 C contiguous to the shorter side faces 3 A and the longer side faces 3 B.
  • the number of sheets of the sanitary tissue paper 2 constituting the bundle 3 is not particularly limited, but may be 30 to 240 sheets, with one ply or a plurality of plies being counted as one sheet.
  • the bundle 3 may be in any size without limitation, and may have a height of 30 to 100 mm by a longitudinal dimension (width) of 150 to 250 mm by a transverse dimension (depth) of 100 to 130 mm, when 200 sheets of sanitary tissue paper are bundled. Remedying effect on the pop-up failure according to the present invention is higher when the dimension in the height direction of the bundle is smaller than the dimension in the depth direction of the top face of the bundle.
  • the filling rate of the packaged product 1 with the bundle 3 is not limited as long as the effects of the present invention are not disturbed, but the gap between the bundle and the packaging film is preferably in the range of 0 to 30 mm.
  • the bundle 3 may be packaged slightly compressed in the top-bottom direction with the packaging film.
  • Each sheet of sanitary tissue paper 2 making up the bundle 3 is of a single-ply structure or of a layered structure of a plurality of plies.
  • the number of plies is not limited, but one ply or two plies are preferred.
  • the basis weight per ply is not limited, but preferably 10 to 40 g/m 2 .
  • One sheet of the sanitary tissue paper preferably has a mass of 1.0 to 2.5 g.
  • the sanitary tissue paper sheets of one or two plies each having the basis weight mentioned above are particularly suitable for paper towels suitably used for wiping hands after washing. Further, the paper thickness per sheet of the sanitary tissue paper is preferably 100 to 500 ⁇ m.
  • the sanitary tissue paper with the number of plies and the basis weight, as well as the paper thickness in the above-mentioned ranges provides excellent effects in resolving pop-up failure, wherein, in the pop-up action, the subsequent sanitary tissue paper sheet is not pulled up but falls back, or stand-up failure, wherein the subsequent sanitary tissue paper sheet cannot stand up from the top face of the package but collapse, in combination with the characteristic shape of the dispenser-port-forming region having a narrowed section, flaring sections, and curved convex sections, which are the features of the present invention.
  • basis weight is determined in accordance with JIS P 8124 (1998).
  • the paper thickness is a value determined by subjecting a specimen to sufficient moisture conditioning under the conditions prescribed in JIS P 8111 (1998), and then measuring the thickness of a plurality of plies under the same conditions, using a dial thickness gauge (thickness measuring device), PEACOCK Model G (OZAKI MFG. CO., LTD.) or an equivalent thereof.
  • the sanitary tissue paper 2 according to the present invention is of a dry type, not a so-called wet type impregnated with liquid chemical.
  • the above-mentioned bundle 3 made up of the sanitary tissue paper sheets 2 entrains a large amount of air.
  • some are of liquid-chemical-applied type, which has liquid chemical, such as a moisturizer including polyols or the like, typically glycerin, applied thereto to increase moisture content by moisture absorption of the polyols or the like, and the sanitary tissue paper may be of this type.
  • the raw material pulp of the sanitary tissue paper 2 is not limited, but may be a blend of pulp derived from softwood, such as NBKP, and pulp derived from hardwood, such as LBKP.
  • the raw material pulp may contain or consist solely of de-inked pulp.
  • the present invention produces particularly excellent effect with sanitary tissue paper having a high flexural rigidity and high stiffness, such as paper towels, so that it is particularly preferred that the raw material pulp contains more than 50% pulp derived from softwood.
  • the dry tensile strength of the sanitary tissue paper 2 is not limited, but sanitary tissue paper having a dry tensile strength of 1000 to 3000 cN/25 mm in the longitudinal direction and 250 to 1500 cN/25 mm in the horizontal direction is particularly suitable for the present invention.
  • the dry tensile strength is determined in accordance with JIS P 8113 (1998). Apparatus for the measurement may be Universal Tensile and Compressing Testing Machine TG-200N manufactured by MINEBEA CO., LTD., or equivalents thereof.
  • the dispenser-port-forming region 5 is formed by disposing an easy-tear line 50 in a loop in the packaging film 4 in the top face 4 C, which faces the topmost sanitary tissue paper sheet 2 of the bundle 3 .
  • the meaning of the term “loop” is not limited to a circular or elliptical shape, but includes a shape forming a closed region. From such a dispenser-port-forming region 5 , a dispenser port 6 , which is an opening for dispensing the sanitary tissue paper 2 , is formed in the top face 4 C of the packaged product 1 , by tearing along the easy-tear line 50 and separating and removing the region bounded by the easy-tear line 50 .
  • the bundle 3 is of a pop-up type and thus, withdrawal of the topmost single sheet of the sanitary tissue paper 2 from the bundle 3 through the dispenser port thus formed, leads to exposure of part of the subsequent sanitary tissue paper sheet located immediately below the topmost, out of the dispenser port.
  • the dispenser-port-forming region 5 is formed by arranging the easy-tear line 50 in a loop
  • the dispenser port 6 formed by removing the region bounded by the easy-tear line 50 is not in the form of a mere slit composed only of a straight line, but has a certain dimension in the depth direction.
  • Such a dispenser-port-forming region 5 allows the packaging film therein to be separated and removed by tearing and continuously peeling the region of the packaging film bounded by the easy-tear line 50 from one end 5 A toward the other end 5 B, and thus provides good handleability in package opening.
  • the end located on the left in each figure is referred to as one end 5 A, whereas the end located on the right is referred to as the other end 5 B, which are defined merely for the sake of explanation, and the two may be used interchangeably.
  • the packaged product 1 of the embodiment shown in FIGS. 1 to 5 has a dispenser-port-forming region 5 of a particularly preferred, approximate gourd shape.
  • This dispenser-port-forming region 5 has a narrowed section 51 extending in the width direction in the middle of the depth direction of the top face 4 C, flaring sections 52 each continued from a corresponding end of the narrowed section 51 and gradually flaring with increasing distance from the narrowed section 51 outward in the width direction of the bundle 3 , and curved convex sections 53 each continued from a corresponding flaring section 52 and bulging convexly outward in the width direction of the bundle 3 .
  • the angle of the easy-tear line 50 with respect to the width direction in each flaring section 52 gradually increases outward in the width direction of the bundle 3 .
  • the portion of the easy-tear line 50 defining the boundary of each flaring section 52 preferably forms a taper angle ⁇ of 25 to 60 degrees with respect to the width direction.
  • the easy-tear line 50 is formed as a curved line and smoothly continues from the flaring section 52 to the curved convex section 53 .
  • the packaged product may be tear-opened along the easy-tear line 50 smoothly from the flaring section 52 toward the curved convex section 53 .
  • formation of the dispenser port 6 from the dispenser-port-forming region 5 results in a pair of approximate trapezoidal free edge flaps 51 A movable in the top-bottom direction, in the vicinity of the opposed boundaries of the narrowed section 51 over to the flaring sections 52 .
  • Withdrawal of a single sheet of sanitary tissue paper 2 from the bundle 3 causes the edge flaps 51 A to deform in the direction of the withdrawal with a slight turn up and to lean against and support the subsequently exposed sheet of sanitary tissue paper 2 .
  • the dispenser port 6 formed from the dispenser-port-forming region 5 the subsequent sanitary tissue paper sheet partly exposed out of the dispenser port 6 following the sanitary tissue paper sheet withdrawn from the bundle 3 is easily deformable in its root portion 2 R to be rolled along the edges 6 E of the curved convex sections 53 into a shape with an enhanced stand-up property.
  • deep indentations 6 H are formed from the respective flaring sections 52 to the respective curved convex sections 53 of the dispenser-port-forming region 5 , and the stand-up property is further enhanced by the root portion 2 R of the subsequent sanitary tissue paper sheet partly exposed out of the dispenser port 6 , fitting in the deep indentations 6 H.
  • the dispenser-port-forming region 5 may be devoid of the flaring sections 52 as shown in FIG. 7 . Further, the dispenser-port-forming region 5 may be provided with one or more straight easy-tear lines connected to the easy-tear line disposed in loop, as long as the effects of the present invention are not disturbed.
  • the dimension L 1 in the width direction of the overall dispenser-port-forming region 5 is 70% or more the dimension L 2 in the width direction of the top face of the bundle 3
  • the maximum dimension L 3 in the depth direction of the overall dispenser-port-forming region 5 is 10 to 40% the dimension L 4 in the depth direction of the top face of the bundle 3
  • the dimension L 5 in the width direction of the narrowed section is 50 to 70% the dimension L 2 in the width direction of the top face of the bundle 3
  • the dimension L 6 in the depth direction of the narrowed section is 0.5 to 10% the dimension L 4 in the depth direction of the top face of the bundle 3 .
  • Such a contour of the dispenser-port-forming region 5 provides curved convex sections 53 particularly broader in the depth direction.
  • the contour also provides still broader and larger free edge flaps 51 A to be formed in the vicinity of the boundaries of the narrowed section 51 , which allows the narrowed section 51 to open widely upon withdrawal of the sheets, resulting in smooth dispensing of the sanitary tissue paper sheets 2 from the bundle 3 .
  • packaging like gusset wrapping or pillow wrapping, which hardly forms a clear folding line along the boundary between the transverse side faces 4 A and the top face 4 C, and thus may cause likely deformation of the packaging film in the top face of the packaged body 1
  • the overall top face is hard to be distorted and likely to be maintained flat upon withdrawal of the sanitary tissue paper sheets 2
  • the packaging product is particularly stable upon dispensing the sanitary tissue paper 2 sheet by sheet.
  • each curved convex section 53 gently rolls the sanitary tissue paper sheet 2 along its edge, which enhances the stand-up property of the hard-to-warp stiff sanitary tissue paper 2 .
  • the dimension L 3 in the depth direction of the curved convex sections 53 is specifically 25 to 45 mm, and that the dimension L 7 in the width direction of the bulging is 2.5 to 12.5 mm.
  • the packaging film 4 that is flexible, made of resin, and forms the exterior of the packaged product 1 may specifically be, for example, a single-layer film of polyethylene, polypropylene, polyester, polyethylene terephthalate, nylon, polyvinylidene chloride, or an ethylene-vinyl alcohol copolymer; a laminate film in which films including any of these are suitably layered; or a gas barrier film obtained by subjecting any of these films to surface treatment, such as aluminum deposition.
  • biomass films may also be used, which derive from plant materials, such as sugar cane, potato (starch), or corn. Use of such biomass films is preferred in light of environmental protection.
  • polypropylene film or polyethylene film is particularly preferred.
  • the packaging film 4 may be a matte film having excellent designability and hand feel properties.
  • the melting point of the film is preferably 150° C. or lower. Note that a lower melting point of the packaging film allows heat sealing treatment at lower temperatures, but the practical lower limit is 80° C.
  • Polypropylene film may be cast polypropylene (CPP) film, whereas polyethylene film may be linear low-density polyethylene (LLDPE) film, low-density polyethylene (LDPE) film, or medium-density polyethylene (MDPE) film.
  • CPP polypropylene
  • LLDPE linear low-density polyethylene
  • LDPE low-density polyethylene
  • MDPE medium-density polyethylene
  • Multi-layered resin films having a polyethylene resin film or a polypropylene resin film laminated on one or both of the surfaces of an ethylene-vinyl alcohol copolymer resin film or a polyethylene terephthalate resin film to improve heat sealability, may also be used.
  • the dispenser-port-forming region 5 has, in the portion defining the boundary of at least one of its ends in the width direction (the other end 5 B in the illustrated embodiment) as particularly shown in FIGS. 5 and 6 , an easy-tear line 50 having a perforated line wherein modified cut areas 50 D each having a major cut part 50 m and a dogleg peripheral cut part 50 e contiguous to an end of the major cut part 50 m at an angle of 90° or larger, are arranged in a line with uncut areas 50 U interposed therebetween.
  • Each modified cut area 50 D may be, as shown in FIG.
  • a modified cut area 50 D 1 having only one end provided with the dogleg peripheral cut part 50 e or a modified cut area 50 D 2 having both ends provided with the dogleg peripheral cut parts 50 e , and the modified cut areas 50 D may be a mixture of these two.
  • the portion may be composed only of the modified cut areas 50 D 1 having only one end provided with the dogleg peripheral cut part 50 e .
  • a cut area 50 C without a peripheral cut part 50 e may be arranged in a perforated line wherein the modified cut areas 50 D are arranged in a line with the uncut areas 50 U interposed therebetween.
  • 80% or more of the portion of the easy-tear line 50 defining the boundary of a curved convex section 53 is a portion 50 P where the modified cut areas 50 D and the uncut areas 50 U are arranged alternately.
  • preferably 90% or more, particularly preferably 95% or more of the portion may be the portion 50 P where the modified cut areas 50 D and the uncut areas 50 U are arranged alternately. All of the portion may be formed with the modified cut areas 50 D and the uncut areas 50 U arranged alternately. Note that, though FIGS.
  • FIG. 5 and 6 illustrate the embodiments wherein the portion defining the boundary of a curved convex section 53 has the modified cut areas 50 D and the uncut areas 50 U arranged alternately
  • the present invention is not limited thereto, but a portion defining the boundary of an end of a dispenser-port-forming region 5 having a simple approximate elliptical shape as shown in FIG. 7 may be formed of the modified cut areas 50 D and the uncut areas 50 U arranged alternately.
  • the peripheral cut part 50 e of the modified cut area 50 D has, as shown particularly in FIG. 5 , a first cut subpart 50 e 1 contiguous to the major cut part 50 m and a second cut subpart 50 e 2 contiguous to the first cut subpart 50 e 1 , which contiguously form a dogleg at an angle ⁇ of 90° or larger therebetween.
  • the layout of the modified cut areas 50 D in the portion wherein the modified cut areas 50 D and the uncut areas 50 U are arranged alternately is such that the peripheral cut parts 50 e of modified cut areas 50 D partly overlap in the width direction of the dispenser-port-forming region with the ends 50 t without a peripheral cut part of respective adjacent modified cut areas 50 D on at least one of the outside and the side closer to the center in the width direction of the dispenser-port-forming region 5 , and the peripheral cut parts 50 e overlap in the width direction of the dispenser-port-forming region 5 with the respective ends 50 t without a peripheral cut part such that a modified cut area 50 D located on the outer side in the width direction of the dispenser-port-forming region 5 is positioned on the outer side in the width direction of the dispenser-port-forming region 5 .
  • FIG. 5 illustrates the embodiment where the peripheral cut parts 50 e overlap in the width direction with the ends 50 t only on the outside in the width direction of the dispenser-port-forming region 5 , but the peripheral cut parts 50 e are not necessarily located on the outside in the width direction of the dispenser-port-forming region 5 , and may be arranged to overlap in the width direction with the ends 50 t only on the side closer to the center in the width direction of the dispenser-port-forming region 5 as in the embodiment of FIG.
  • peripheral cut parts 50 e overlap in the width direction with the ends 50 t on the outside in the width direction of the dispenser-port-forming region 5 while the some other peripheral cut parts 50 e overlap in the width direction with the ends 50 t on the side closer to the center in the width direction of the dispenser-port-forming region 5 as shown in FIG. 6 ( a ) .
  • the peripheral cut parts 50 e overlap in the width direction with the respective ends 50 t such that, not the peripheral cut parts 50 e per se, but the modified cut areas 50 D having the peripheral cut parts 50 e and located on an outer side in the width direction of the dispenser-port-forming region 5 than the respective adjacent modified cut areas 50 D are positioned on the outer side.
  • the same may preferably be applied to embodiments wherein the peripheral cut parts 50 e overlap in the width direction with a cut area 50 C without a peripheral cut part 50 e and, when a cut area 50 C without a peripheral cut part 50 e is located outer side in the width direction of the dispenser-port-forming region 5 than the adjacent modified cut area 50 D as shown in FIG. 6 ( b ) , the two may preferably overlap in the width direction with each other such that an end of the cut area 50 C without a peripheral cut part 50 e is positioned outer side in the width direction of the dispenser-port-forming region 5 than the peripheral cut part 50 e of the adjacent modified cut area 50 D.
  • the second cut subpart 50 e 2 of a peripheral cut part 50 e is preferably arranged substantially in parallel to the major cut part 50 m .
  • substantially in parallel does not necessarily mean “completely in parallel”, and may allow a margin of generally ⁇ 10°.
  • the portion 50 P where the modified cut areas 50 D and the uncut areas 50 U are arranged alternately is provided on an end in the width direction (the other end 5 B in the illustrated embodiment) of the dispenser-port-forming region 5 according to the present invention, which is the last to be tear-opened and the most prone to ripping in the usual opening operation by continuously peeling the region bounded by the easy-tear line 50 from one end 5 A toward the other end 5 B.
  • the peripheral cut part 50 e of one modified cut area 50 D overlaps in the width direction of the dispenser-port-forming region with an end 50 t without a peripheral cut part of the adjacent modified cut area 50 D at the boundary on the other end 5 B, particularly such that one of the peripheral cut part 50 e and the end 50 t without a peripheral cut part of the modified cut area 50 D located on the outer side in the width direction is positioned on the outer side in the width direction than the other of the peripheral cut part 50 e and the end 50 t of the adjacent modified cut area 50 D.
  • the peripheral cut part 50 e that has already been cut out is present at a location further in the direction of peeling in the outer side in the width direction compared to the uncut area 50 U. Accordingly, even if small ripping is generated in the packaging film while the uncut area 50 U between the modified cut areas 50 D is tear-opened during the opening operation, the small ripping is likely to connect immediately to the peripheral cut part 50 e of the adjacent modified cut area 50 D that has already been cut out, so that no further ripping is likely to proceed.
  • the ends of the adjacent modified cut areas 50 D are offset both in the width direction and in the depth direction, so that in the usual opening operation of the packaged product by continuously peeling the region bounded by the easy-tear line 50 from one end 5 a toward the other end 5 B, the uncut area 50 U between the adjacent modified cut areas 50 D is twisted immediately before being torn, and thus ripping or elongation of the film may hardly occur.
  • the modified cut areas 50 D and the uncut areas 50 U are arranged alternately, the packaged product is easily openable, and the risk of ripping during the opening may be reduced.
  • the cuts are opened smoothly from the peripheral cut part 50 e to the major cut part 50 m . Further, the cuts are opened still more smoothly with the first cut subpart 50 e 1 and the second cut subpart 50 e 2 arranged at an angle of 90° or larger.
  • the dispenser-port-forming region 5 providing particularly excellent withdrawability of stiff paper towels or the like, which is in the form of an approximate gourd shape having the narrowed section 51 , flaring sections 52 , and the curved convex sections 53 as shown in FIGS. 1 to 5 and has the dimensions in the preferred numerical ranges discussed above, the portion of the easy-tear line defining the boundary of a curved convex section 53 is broad and arranged along the depth direction, which may result in a large angle formed between the peeling direction for opening and the direction of tear-opening along the easy-tear line, and thus likely ripping of the packaging film 4 in the opening operation.
  • the risk of the ripping is significantly reduced.
  • This is particularly effective with the packaging configuration, such as pillow wrapping or gusset wrapping, which is prone to ripping as the longitudinal direction (MD) of the packaging film 4 is parallel to the longitudinal direction of the dispenser-port-forming region 5 .
  • the peripheral cut parts 50 e cause slight displacement of the ends of the modified cut areas 50 U inward or outward in the width direction from the direction along which the major cut parts 50 m extend, so that formation of the dispenser port 6 results in slight projections originated from the portions which have been the uncut areas 50 U to form serrated edges.
  • a modified cut area 50 D is located on the virtual line extending in the width direction and passing the center C of the dimension in the depth direction of the narrowed section 51 , and is a modified cut area 50 D 2 having each end provided with the peripheral cut part 50 e which overlaps in the width direction of the dispenser-port-forming region 5 with the adjacent end of the adjacent modified cut area 50 D on the outside in the width direction of the dispenser-port-forming region 5 .
  • the modified cut area 50 D located outward in the depth direction of the modified cut area 50 D 2 on each side thereof is a modified cut area 50 D 1 having only one end provided with the peripheral cut part 50 e which overlaps in the width direction of the dispenser-port-forming region 5 with the adjacent end of the adjacent modified cut area 50 D on the outside in the width direction of the region 5 , the only one end being located outward in the depth direction of the center C of the dimension in the depth direction of the narrowed section 51 .
  • the peripheral cut part 50 e of the adjacent modified cut area 50 D 1 , 50 D 2 is present at a position further in the direction of peeling outer side in the width direction, so that even if small ripping is generated in the packaging film while the uncut area 50 U between the adjacent modified cut areas is tear-opened during the opening operation, the small ripping is likely to connect immediately to the peripheral cut part 50 e , which has already been cut out, so that no further ripping is likely to proceed.
  • the ratio in length between the modified cut areas 50 D and the uncut areas 50 U on an end of the dispenser-port-forming region 5 is not particularly limited, but the length L 8 of each modified cut area 50 D may be, though not limited to, 5 mm to 20 mm, preferably 7 mm to 13 mm.
  • the length L 9 of the first cut subpart 50 e 1 and the length of L 9 of the second cut subpart 50 e 2 of each peripheral cut part 50 e may not necessarily be the same, and may respectively be 0.2m to 3.0 mm, preferably 0.5 mm to 2.5 mm.
  • the length L 1 l of each uncut area 50 U between modified cut areas 50 D may be 0.2 mm to 3.0 mm, preferably 0.3 mm to 2.0 mm.
  • the dimension L 12 of overlap between the peripheral cut part 50 e of one modified cut area 50 D and the end without a peripheral cut part of the adjacent modified cut area 50 D is not particularly limited, but may be 0.2 mm to 3.0 mm, preferably 0.3m to 2.0 mm. Within this range, the uncut areas 50 U are cut while ripping hardly occurs between the modified cut areas 50 D, promoting smooth and continuous tear-opening.
  • angle ⁇ between the major cut part 50 m and the first cut subpart 50 e 1 of the peripheral cut part 50 e and the angle ⁇ between the first cut subpart 50 e 1 and the second cut subpart 50 e 2 may not necessarily be the same, and may respectively fall within a range of 90° or larger, preferably 100° or larger, more preferably 120° or larger.
  • the transition from the major cut part 50 m to the first cut subpart 50 e 1 and the transition from the first cut subpart 50 e 1 and the second cut subpart 50 e 2 are preferably rounded, though not necessarily identically, and the curvature of the rounding is not limited, but may be preferably R 0.1 to R 2.0, more preferably R 0.2 to R 1.2, particularly preferably R 0.4 to R 1.1. At such a curvature, the tear-opening along the modified cut areas smoothly proceeds from the major cut part 50 m to the peripheral cut part 50 e or from the peripheral cut part 50 e to the major cut part 50 m.
  • the portion 50 P where the modified cut areas 50 D and the uncut areas 50 U are arranged alternately may be provided on both ends or on only either end of the dispenser-port-forming region 5 .
  • the other end may be such that, for example, the part L 10 of the easy-tear line extending from the middle of the flaring section 52 A beyond the laterally outer end 53 t of the curved convex section 53 A on one side of the depth direction is formed as a continuous cut area, as shown in FIG. 8 ( a ) . In this way, as shown in FIG.
  • a tab 5 T is formed in the part of the dispenser-port-forming region 5 on one end 5 A from one side of the depth direction up to the laterally outer end. This tab 5 T may easily be picked and peeled to further facilitate the opening operation.
  • the thickness of the packaging film 4 may suitably be selected, and preferably 20 to 75 ⁇ m as measured in accordance with JIS P 8118 (1998). With the thickness of 20 to 75 ⁇ m, the packaging film may particularly effectively produce the effects of the present invention. The thickness is measured using a dial thickness gauge (thickness measuring device), PEACOCK Model G- 1 A (OZAKI MFG CO., LTD.) or an equivalent thereof, after the specimen is subjected to sufficient moisture conditioning under the conditions prescribed in JIS P 8111 (1998).
  • a dial thickness gauge thickness measuring device
  • PEACOCK Model G- 1 A OZAKI MFG CO., LTD.
  • a portion of the easy-tear line 50 defining the dispenser-port-forming region 5 according to the present invention other than where the cut areas 50 C and the uncut areas 50 U are arranged alternately, may be a perforated line, a slit cut line having uncut areas, or the like, but is not limited thereto.
  • the perforated line may be a standard perforated line wherein the cut areas 50 C are straight lines; a microperforated line wherein the cut areas are pores; or a cutline for zipper tear strip wherein each cut area is Y-shaped, approximate L-shaped, or dogleg, with the standard perforated line being preferred.
  • a slit cut line refers to slit-like areas cut in a film, and by leaving uncut areas, the cut areas and the uncut areas are alternately arranged.
  • a slit cut line having uncut areas may be referred to simply as a slit cut line.
  • Perforated lines and slit cut lines having uncut areas may not sometimes be distinguished from each other, but as used herein, a slit cut line refers to a line with less than two pitches of standard straight cut areas, i.e., a line in which two consecutive standard cut areas of the same length are not continuous.
  • a slit cut line has cut areas of a larger length compared to those of a perforated line.
  • a cut/tie ratio of a perforated line or a slit cut line having uncut areas in the portion of the easy-tear line 50 other than where the cut areas 50 C and the uncut areas 50 U are arranged alternately may be decided with suitable intervals, depending on easiness of fracture of the film used, and the length of each cut area may suitably be designed to fall within a range of 0.8 mm to 20.0 mm, and the length of each uncut area (or tied area) within a range of 0.3 mm to 5.0 mm.
  • Part or all of the uncut areas 50 U of the easy-tear line 50 according to the present invention may be half-cut areas, in each of which the packaging film 4 is not completely cut through in its thickness direction from the top surface, which does not face the bundle 3 , down to the bottom surface, which faces the bundle, but is cut for a certain extent in the thickness direction.
  • the uncut areas 50 U between the modified cut areas 50 D on an end of the dispenser-port-forming region 5 , particularly the curved convex section 53 may be half-cut areas.
  • the extent of the cut at the half-cut areas is not limited, but may preferably be 20% to 80% the thickness of the packaging film.
  • the boundaries of the narrowed section 51 extend in the same direction as the peeling direction from the one end 5 A toward the other end 5 B in the opening operation, and are thus preferably composed of perforated lines having uncut areas not substituted with the half-cut areas. This preferably keeps the boundaries of the narrowed section 51 from unintended tear-opening.
  • the easy-tear line 50 which may be a perforated line or a slit cut line having uncut areas, may be formed at one time by, for example, die cutting, even including a portion where the cut areas 50 C and the half-cut areas are arranged alternately.
  • packaged products were prepared in Examples 1 to 4 according to the present invention and in Comparative Examples 1 and 2, and tested for fall back of the sanitary tissue paper sheets inside the products and for ripping of the dispenser port.
  • the dispenser-port-forming regions of the packaged products in Examples 1 to 4 and Comparative Example 1 are in an approximate gourd shape having the narrowed section, the flaring sections, and the curved convex sections as shown in FIGS. 1 to 5 .
  • the dispenser-port-forming region of the packaged product in Comparative Example 2 is in the form of a mere straight perforated line.
  • the bundle in the packaged product in each Example is a pop-up-type bundle of 100 sheets of interfolded and stacked one-ply paper towel (tradename “Rakura Cook Kitchen Paper”, 20 g/ m 2 in basis weight, 220 ⁇ m in paper thickness).
  • the packaging configuration in each Example is gusset wrapping, with the stretching direction of the packaging film aligned to the direction perpendicular to the width direction of the dispenser-port-forming region.
  • the packaged product was tear-opened along the easy-tear line defining the dispenser-port-forming region to form the dispenser port therein, the sheets of paper towels constituting the bundle were pulled out one by one through the dispenser port until the last sheet, and the number of actual fall backs occurred was counted.
  • Example Example Comparative Comparative 1 2 3 4 Example 1
  • Example 2 Shape of Width of bundle mm 210 186 210 210 210 210 dispenser-port- top face forming region Depth of mm 115 115 115 115 115 115 bundle top face Dimension in mm 170 145 170 170 170 150 width direction of dispenser port Maximum mm 35 35 35 35 — dimension in depth direction of dispenser port Dimension in mm 5 5 5 5 5 — depth direction in the middle of dispenser port Dimension in mm 105 80 105 105 105 — width direction of narrowed section Dimension in mm 5 5 5 5 5 5 5 — depth direction of narrowed section Width of % 81 78 81 81 81 71 dispenser port/ Width of bundle top face Maximum % 30 30 30 30 30 30 — dimension in depth direction of dispenser port/depth of bundle top face Dimension in % 50 43 50 50 50 — width direction of narrowed section/Depth of bundle top face Dimension in % 4 4 4 4 4 — depth direction
  • Table 1 shows that, in Examples 1 to 4, wherein the portion of the easy-tear line defining the boundary on an end (curved convex section) of the dispenser-port-forming region has the modified cut areas and the uncut areas arranged alternately, irrespective of the fact that the maximum dimension in the depth direction of the dispenser port, i.e., the dimension in the depth direction of the curved convex sections, which are on the ends of the dispenser-port-forming region, is as long as 35 mm, which occupies as much as 30% the dimension in the depth direction of the top face of the bundle, and is thus easy to rip, no ripping on the ends of the dispenser port was observed in the opening operation in any of the samples.
  • ripping on an end of the dispenser port in the opening operation may further be prevented by forming the portion of the easy-tear line which defines the boundary on an end with the modified cut areas and the uncut areas arranged alternately.
  • the packaged product according to the present invention is a film-packaged product which is hard to be ripped on an end in the width direction of the dispenser port upon opening and thus provides excellent openability, and also provides excellent withdrawability of sheets of sanitary tissue paper, in particular even stiff sanitary tissue paper, such as paper towels.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
US18/555,749 2021-06-15 2022-03-16 Packaged product Pending US20240199310A1 (en)

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JP2021099233A JP2022190792A (ja) 2021-06-15 2021-06-15 包装体
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PCT/JP2022/012005 WO2022264578A1 (ja) 2021-06-15 2022-03-16 包装体

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JPS6117028U (ja) * 1984-07-05 1986-01-31 凸版印刷株式会社 紙箱のジツパ−
JP3069849U (ja) * 1999-12-21 2000-07-04 丸金印刷株式会社 医薬品などの包装用箱
JP6532445B2 (ja) 2016-09-29 2019-06-19 大王製紙株式会社 ティシュペーパー包装製品
JP6767298B2 (ja) * 2017-03-31 2020-10-14 大王製紙株式会社 フィルム包装ティシュー
JP6709772B2 (ja) 2017-11-06 2020-06-17 大王製紙株式会社 フィルム包装ティシュペーパー及びフィルム包装ティシュー集合包装体
AU2019266309B2 (en) * 2018-05-11 2024-03-28 Sonoco Development, Inc. Child resistant laminate packages and methods for making a child resistant package
JP7224121B2 (ja) * 2018-06-29 2023-02-17 大王製紙株式会社 衛生薄葉紙包装体
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