Patent Application
20210261289
The present invention relates to a film packaging type sanitary tissue package in which a bundle of sanitary tissues such as tissue paper is wrapped with a film.
As a package of sanitary tissues such as tissue paper, a paper box type storing body, also referred to as a box tissue, that stores a bundle of sanitary tissues in a paper storage box such as a white ball referred to as a carton has been well known. In most of paper box type sanitary tissue packages, a pop-up type bundle of about 120 to 250 sets, each of which has two to four sanitary tissues, are stored.
Meanwhile, to reduce packaging materials and improve transport costs and portability due to compactness, there is a film packaging type sanitary tissue package in which a pop-up type bundle having the same number of sets as that of the paper box type storing body is packaged with a flexible resin film.
As the film packaging type sanitary tissue package, a pillow wrapping mode and an overwrap wrapping mode have been well known. The pillow wrapping mode is a wrapping mode in which a bundle corresponding to a packaged object is wrapped in a width direction with a long film, edge portions overlapped in a wrapping direction are stuck to each other, and a part extending in a lengthwise direction of a film beyond the packaged object is stuck in a gusset form and sealed.
Overwrap wrapping is a wrapping mode also referred to as caramel wrapping or combined wrapping, and is a wrapping form in which a bundle corresponding to a packaged object is rolled up to be wrapped in a tubular shape using a film, overlapping parts are stuck to each other in a wrapping direction, a part where the film extends beyond the bundle corresponding to the packaged object is folded from two opposite edges to the packaged object side, and at least respective tip edge portions of triangular or quadrangular pieces formed at that time are stuck and sealed. When compared to a pillow wrapped one, an overwrap wrapped one has a shape closer to a rectangular parallelepiped shape. Further, the rigidity of a sealed part formed by sticking the triangular or quadrangular pieces is high. Moreover, even when a height of the bundle is reduced by using the sanitary tissue after opening, a shape retention property of a packaging bag is excellent in many cases.
Meanwhile, as a take-out port of the film packaging type sanitary tissue package, in addition to a slit-shaped take-out port formed by arranging one perforation on a straight line on an upper surface part and tearing the perforation, it has been common to use a chamfered rectangular, rectangular, or elliptical opening formed by forming a chamfered rectangular, rectangular, or elliptical annular perforation on an upper surface part frequently seen in a paper box type and cutting off the part.
Patent Literature 1: JP 2002-308352 A
Patent Literature 2: JP 2010-195443 A
Patent Literature 3: JP 2018-52559 A
Patent Literature 4: JP 2004-224362 A
Patent Literature 5: JP 2016-188092 A
However, one perforation arranged on the straight line on the upper surface part is easy to tear beyond both ends of the perforation during opening.
In addition, in the overwrap wrapped one, the shape of the packaging bag hardly collapses. Thus, in the case of a mere slit-shaped take-out port, the resistance at the time of taking out the sanitary tissue is large. In particular, when the number of sets forming the bundle is small and the weight of the bundle is light, the entire package is likely to be lifted. In the case of a mere chamfered rectangular, rectangular, or elliptical opening, the sheet easily falls into the package from the opening, especially when the number of sets forming the bundle is small.
Therefore, a main object of the invention is to provide an overwrap-wrapped sanitary tissue package, which is excellent in sanitary tissue take-out property and prevention of falling.
The means for solving the above problems are as follows.
First means is a sanitary tissue package including a bundle of folded sanitary tissues stacked in a pop-up type, and a film overwrap-wrapping the bundle of folded sanitary tissues,
in which a top surface part of the film includes a take-out port forming portion surrounded by a pair of first easy tear lines that extends along a width direction in which folded edges of the sanitary tissue extend and is spaced apart in a depth direction orthogonal to the width direction and a pair of second easy tear lines that extends along the depth direction and connects end portions of the pair of first easy tear lines,
the take-out port forming portion forms a shape having
an end portion narrowing portion in which the pair of first easy tear lines gradually approaches each other from connection portions with respect to the second easy tear lines to a side of a center portion of the bundle in the width direction and a width therebetween narrows,
a widened portion in which the pair of first easy tear lines is gradually separated from each other from a side of the end portion narrowing portion to the side of the center portion of the bundle in the width direction and the width therebetween widens, and
a wide portion in which the pair of first easy tear lines is gradually separated from each other to bulge outward in the depth direction at least until a length therebetween becomes longer than a length of the second easy tear lines further toward the center portion of the bundle in the width direction from the widened portion,
by peeling off an inside of a range of the take-out port forming portion, acute corner portions are formed at positions between the first easy tear lines and the second easy tear lines, and free edge pieces including edges in a range from the end portion narrowing portion to the wide portion are formed, and
a length between the first easy tear lines between the end portion narrowing portion and the widened portion is 10% or less of a length of the bundle in the depth direction, and a length between the first easy tear lines in the wide portion is 60% or less of the length of the bundle in the depth direction.
Second means is the sanitary tissue package according to the first means, in which a length of the second easy tear lines is 1.0 to 16.0% of a length of the bundle in the depth direction.
Third means is the sanitary tissue package according to the first or second means, in which a connecting portion in which an interval between the pair of first easy tear lines is constant is included between the end portion narrowing portion and the widened portion.
Fourth means is the sanitary tissue package according to any one of the first to third means, in which the pair of first easy tear lines in the end portion narrowing portion and the widened portion is curved lines.
Fifth means is the sanitary tissue package according to any one of the first to fourth means, in which the first easy tear lines and the second easy tear lines are perforations.
Sixth means is the sanitary tissue package according to the third means, in which the pair of first easy tear lines in the end portion narrowing portion and the widened portion is slits communicating with an inside and an outside, and the pair of first easy tear lines in the connecting portion and the wide portion are perforations of tie 0.5 mm to 3.0 mm and cut 1.0 mm to 7.00 mm.
Seventh means is the sanitary tissue package according to the first, second, third, fourth, or sixth means, in which the second easy tear lines are slits having uncut portions at a center portion in the depth direction.
Eighth means is the sanitary tissue package according to any one of the first to seventh means, in which a width of the edge pieces is 8 to 28 mm.
The invention provides a sanitary tissue package for overwrap wrapping, which is excellent in sanitary tissue take-out property and prevention of falling.
Hereinafter, a description will be given of embodiments of the invention with reference to
A sanitary tissue package 1 of the present embodiment is obtained by wrapping a bundle 3 of sanitary tissues 2 with a film 4, and a take-out port forming portion 50 for forming a take-out port 60 for taking out the contained sanitary tissues 2 one by one is provided on a top surface part 1A of the film 4.
The sanitary tissue package 1 is a so-called pop-up type, and when one or a set of sanitary tissues 2 is taken out from the take-out port 60 formed by tearing the take-out port forming portion 50, a part of a sanitary tissue 2 to be taken out next is exposed so that the sanitary tissue 2 can be pinched. Note that in
The sanitary tissue 2 according to the present embodiment is tissue paper, paper towel, toilet paper, etc. In particular, the invention is particularly effective in the case of tissue paper having a ply structure in which two to four pieces of base paper having dry crepe are stacked to form a set. In forming the ply structure, both end portions of a stacked continuous sheet can be bonded by ply bonding, or four sides of a sanitary tissue sheet or the entire surface of the sheet can be bonded by embossing means. Further, the sanitary tissue 2 according to the invention is a dried dry type, and is not a so-called wet type impregnated with a chemical solution. Therefore, the bundle 3 contains air between the layers. Note that in the dry type sanitary tissue 2, particularly in tissue paper, there is a moisturizing tissue to which a moisturizing agent, etc. is added, and the sanitary tissue package 1 according to the invention is particularly effective in the moisturizing tissue since the bundle 3 is wrapped by the film 4, and thus the contents rarely dry when compared to the paper box type, and distortion of paper in the paper box due to moisture absorption unique to the moisturizing tissue does not occur.
In a suitable sanitary tissue 2 according to the invention, the raw material pulp is a mixture of NBKP and LBKP. Even though used paper pulp may be blended, it is preferable that it contains only NBKP and LBKP in terms of texture. A blending ratio is preferably NBKP:LBKP=20:80 to 80:20, and particularly preferably NBKP:LBKP=30:70 to 60:40.
It is desirable that the sanitary tissue preferably has a basis weight of 10 to 25 g/m2 per ply (per sheet of base paper constituting one set). In particular, 10 to 18 g/m2 is preferable. The basis weight here refers to that measured by the measuring method of JIS P 8124 (1998). In addition, a paper thickness of the sanitary tissue is not necessarily limited, and is 90 to 170 μm in a 2-ply state, and more preferably 90 to 150 μm. In a three-ply state, the paper thickness is 180 to 280 μm, and more preferably 180 to 250 μm. In a four-ply state, the paper thickness is 200 to 320 μm, and more preferably 200 to 280 μm. The paper thickness here refers to a value measured in a state of one set by adjusting the humidity of a test piece sufficiently under the conditions of JIS P 8111 (1998), and then using a dial thickness gauge (thickness measuring instrument) “PEACOCK G type” (manufactured by OZAKI MFG. CO., LTD.) under the same conditions.
In particular, as illustrated in
Note that the number of sets of the sanitary tissues 2 included in the bundle 3 is not limited. However, a tissue paper storing body that stores tissue paper is generally 80 to 240 sets with 2 plies (two sheets stacked), 3 plies (three sheets stacked), or 4 plies (four sheets stacked) as one set, and may be similarly set to 80 to 240 sets in the sanitary tissue package of the present embodiment.
A wrapping mode of the bundle 3 by the film 4 of the sanitary tissue package 1 according to the invention is overwrap wrapping. Overwrap wrapping is a wrapping mode also referred to as caramel wrapping. In particular, as illustrated in
The sanitary tissue package 1 according to the invention is, in particular, in overwrap wrapping, and is a wrapping mode in which a tubular opening sealing portion 4C (
In addition, in the sanitary tissue package 1 according to the invention, a difference between the respective sites in the outer shell dimensions of the film 4 (width×depth×height) and the dimensions of the bundle (width×depth×height) is not necessarily limited. In this type of product, the dimensions are generally −2 mm to +5 mm with respect to the dimensions of the bundle, which is similarly applied to the sanitary tissue package 1 according to the invention.
In the sanitary tissue package 1 according to the invention, such overwrap wrapping is adopted, and the take-out port forming portion 50 for forming the take-out port 60 extends along a width direction 3W in which the folded edges 2C of the sanitary tissue 2 extend and is in a range surrounded by a pair of first easy tear lines 5A and 5A spaced apart in a depth direction 3D orthogonal to the width direction, and a pair of second easy tear lines 5B and 5B extending along the depth direction 3D and connecting end portions of the pair of first easy tear lines 5A and 5A. Here, the easy tear lines 5A and 5B are lines easily torn by the lines, and are, for example, perforations or slit lines provided with uncut portions at appropriate intervals. Alternatively, a line formed by reducing the thickness of the film may be used.
Further, the take-out port forming portion 50 according to the invention characteristically forms a shape having an end portion narrowing portion 51 in which the pair of first easy tear lines 5A and 5A gradually approaches each other from connection portions P1 and P1 with respect to the second easy tear lines 5B and 5B toward a center portion side of the bundle 3 in the width direction and a width therebetween narrows, a widened portion 52 in which the pair of first easy tear lines 5A and 5A is gradually separated from each other from the end portion narrowing portion 51 side toward the center portion side of the bundle 3 in the width direction and the width therebetween widens, and a wide portion 53 in which the pair of first easy tear lines 5A and 5A is gradually separated from each other to bulge outward in the depth direction at least until a length therebetween becomes longer than the length of the second easy tear line 5B further toward the center portion of the bundle 3 in the width direction from the widened portion 52. In particular, a length JW between the first easy tear lines between the end portion narrowing portion 51 and the widened portion 52 is 10% or less of a length L1 of the bundle 3 in the depth direction 3D, preferably 1.6 to 8.3% thereof, and a length SW between the first easy tear lines 5A and 5A in the wide portion 53 is 60% or less of the length L1 of the bundle 3 in the depth direction 3D, and preferably 45 to 57% thereof.
In the sanitary tissue package 1 according to the invention, since the take-out port forming portion 50 forms the shape having the end portion narrowing portion 51, the widened portion 52, and the wide portion 53, when a part within a range of the take-out port forming portion 50 is cut off, first, an acute corner portion P (
In addition, in the sanitary tissue package 1 according to the invention, since the take-out port forming portion 50 forms the shape having the end portion narrowing portion 51, the widened portion 52, and the wide portion 53, when the part within a range of the take-out port forming portion 50 is cut off, free edge pieces 61 and 61 including edges in a range from the end portion narrowing portion 51 to the wide portion 53 are formed. That is, since the pair of first easy tear lines 5A and 5A according to the invention first approaches in the end portion narrowing portion 51, is spaced apart in the widened portion 52, and extends outward in the depth direction with respect to ends of the second easy tear lines 5B in the wide portion 53 toward the center portion of the bundle 3 in the width direction, a range connecting an edge E1 in a range from the end portion narrowing portion 51 to the wide portion 53, the corner portion P, and an outer position P2 in the depth direction of the bundle 3 with respect to at least the end of the second easy tear line 5B in the wide portion becomes the free edge piece 61 formed of the flexible film 4.
In the sanitary tissue package 1 according to the invention, since the take-out port 60 related to the take-out port forming portion 50 is formed, a pull-out property and a fall prevention property are excellent. Note that the take-out property includes not only the ability to smoothly pull out the sanitary tissue, but also the fact that a part of the next one sheet or one set exposed after pulling out one sheet or one set is easy to stand and is easily pinched.
In the sanitary tissue package 1 according to the invention, since the opening is wide at the position corresponding to the wide portion 53, there is little resistance at the time of pulling out, and it is easy to pull out smoothly. In addition, the first one sheet is easy to pinch. In particular, the length SW between the first easy tear lines 5A and 5A in the wide portion 53 is 60% or less of the length in the depth direction of the bundle, an excessively wide opening is not formed, and the fall prevention property is ensured in combination with other configurations. Meanwhile, in particular, as illustrated in
Furthermore, since the bundle 3 has a pop-up type structure as the sanitary tissue package 1 according to the invention, when pulling out one sheet or one set, the edge 20E and the surface of the part 20 of the sanitary tissue 2 pulled out thereafter are directed toward the take-out port while moving in the depth direction 3D, and guided by an edge of the take-out port 60 when exposed from the take-out port 60. In the sanitary tissue package 1 according to the invention, since the take-out port 60 widens from a position between the end portion narrowing portion 51 and the widened portion 52 toward a position of the end portion narrowing portion, when the part 20 of the sanitary tissue 2 is pulled out, the edge 20E of the sanitary tissue 2 is easily guided to the corner portion P. In addition, in particular, when a space between the end portion narrowing portion 51 and the widened portion 52 becomes 10% or less of the length of the bundle 3 in the depth direction 3D, the surface of the sanitary tissue 2 is reliably supported by the edge, and the fall prevention property is enhanced. Note that when the connecting portion 54 in which an interval between the pair of first easy tear lines is constant is provided as a range in which a space between the first easy tear lines 5A and 5A is 10% or less, the surface of the sanitary tissue 2 is more easily supported, and the fall prevention property is further enhanced.
Here, it is desirable that the pair of first easy tear lines 5A and 5A in the end portion narrowing portion 51 and the widened portion 52 is curved lines. Since the edge E of the take-out port 60 has a smooth curve, the sanitary tissue 2 is smoothly guided by the edge, and the pull-out property is further improved.
In addition, the overall shape of the wide portion 53 is not particularly limited. However, as in the illustrated example, it is desirable to adopt a circular shape, an elliptical shape, or a chamfered quadrangle having curved edges. It is hardly get caught on the edge when pulling out and it is easy to pull out smoothly.
It is desirable that a length PW of the first easy tear lines 5A and 5A in the width direction 3W of the bundle 3 in the sanitary tissue package 1 according to the invention is shorter than a width direction length L2 of the bundle 3, and is particularly 87 to 97% thereof. When 97% is exceeded, the edge 20E of the sanitary tissue 2 becomes difficult to enter the corner portion P.
In addition, it is desirable that a length EW of the second easy tear line 5B in the sanitary tissue package 1 according to the invention is 3 to 16% of the length L1 of the bundle 3 in the depth direction 3D. Within this range, the edge 20E easily enters the corner portion P.
It is desirable that a width Bh of the edge piece 61 in the sanitary tissue package 1 according to the invention, that is, a width Bh from a line Bb connecting the corner portion P1 (one of the corner portions P) and a position P2 on an edge side of the wide portion 53 corresponding thereto (the line Bb is a tangent to the outer edge of the wide portion 53 and passes through the corner portion P1) to an opening edge E is 8 to 24 mm. Note that the position P2 on the edge side of the wide portion 53 on the line Bb connecting the corner portion P and the edge of the wide portion 53 is a position where the width Bh is the longest. Within the range of the width Bh, a sanitary tissue having a general size can be sufficiently supported and held.
Meanwhile, the first easy tear line 5A and the second easy tear line 5B in the sanitary tissue package 1 according to the invention can be formed by perforations or slits having an uncut portion at an appropriate position as described above. However, more preferably, in the end portion narrowing portion 51 and the widened portion 52, the first easy tear line 5A is formed as a slit communicating with the inside and outside. Further, in the connecting portion 54 and the wide portion 53, it is desirable that the first easy tear lines 5A are tie 0.5 mm to 3.0 mm and cut 1.0 mm to 7.00 mm perforations. In the connecting portion 54 and the wide portion 53, it is more preferable that the first easy tear lines 5A are a tie of 1.5 mm to 2.5 mm and a cut of 2.0 mm to 5.0 mm perforations. It is not easily torn during transportation or loading, and is easily broken by fingers. In addition, it is desirable that the second easy tear line 5B is perforations in which a position that becomes the corner portion P is cut or a slit in which an uncut portion is provided especially in the center portion in the depth direction 3D. In the case of the configuration as the slit or perforations in this way, as illustrated in
Here, specific examples of a flexible resin film material contained in the film 4 according to the invention may include a single layer film of a polyethylene, a polypropylen, a polyester, a polyethylene terephthalate, a nylon, a vinylidene chloride, or an ethylene vinyl alcohol copolymer, an appropriately stacked laminate film containing these films, or a gas barrier film with surface treatment such as aluminum vapor deposition on those films. However, a polypropylene film and a polyethylene film are preferable from a viewpoint of cost. In particular, a non-stretched polypropylene film (CPP) having excellent heat fusion property is desirable.
The thickness of the film 4 may be appropriately selected in consideration of flexibility, cost, gas permeability, and heat-fusion property during packaging. Preferably, it is desirable that the thickness measured conformed to JIS P 8118 (1998) is 20 to 60 μm, and the softness measured based on the handle odometer method according to JIS L 1096 (2010) E method is 5.0 to 50.0 cN. With such thickness and softness, the film is less likely to be torn, and the pop-up property is likely to be excellent.
Next, with regard to the shape of the take-out port forming portion in the sanitary tissue package according to the invention, the opening property, the pull-out property, and a falling property were tested. Examples are related to the invention, and the comparative examples are unrelated to the invention. Comparative Example 5 has an opening forming portion formed of one perforation, particularly along the bundle width direction, and has a linear slit at a take-out port. Note that a tie cut ratio thereof is 2 mm for ties and 3 mm for cuts.
All wrapping modes are overwrap wrapping, and a sealing portion is formed by heat fusion. The product outer shell dimensions and the bundle dimensions were made almost the same except for manufacturing errors, and the bundles were the commercially available S size and M size. Note that the M size bundle is a bundle of non-moisturizing tissue paper containing no moisturizing agent, and the S size bundle is a bundle of moisturizing type tissue paper containing 14% by mass of the moisturizing agent.
The main physical properties and film materials of the sanitary tissues are all the same and are shown in the table. The dimensions of each portion are as shown in Tables 1 and 2, where Table 1 shows the S size test results and Table 2 shows the M size test results.
The evaluations in the table are based on the following criteria.
“1” Difficult to open since the first end portion narrowing portion is difficult to grip
“2” Film sheet breaks during opening from the end portion narrowing portion
“3” Film sheet stretches and is difficult to open during opening from the end portion narrowing portion
“4” Even though opening can be performed all at once from the end portion narrowing portion, some perforations remain (bad appearance)
“5” Opening can be performed all at once from the end portion narrowing portion, and there is no perforation left
“1” The entire package is lifted during pulling out
“2” Even when three sets are pulled out from the beginning, breaking may occur when the sanitary tissue is pulled
“3” Taking out can be performed without breaking from the second to third set
“4” Taking out can be performed even though there is resistance from the second to third set
“5” Taking out can be smoothly performed from the second to third set
“1” When the sanitary tissues are pulled out, no sanitary tissue stands up
“2” When the sanitary tissues are pulled out, 50% or less of the sanitary tissues stand up.
“3” When the height of the bundle becomes about half, some do not stand up.
“4” Almost stand up.
“5” Except for the first one set, the next one stands up after pulling out until the last one.
“1” When the sanitary tissues are pulled out, the sanitary tissues fall into the take-out port many times
“2” Falling was confirmed a plurality of times (three times or more) until the height of the bundle dropped to about ¼.
“3” Falling was confirmed once to twice until the height of the bundle dropped to about ¼.
“4” Only a few sheets on the bottom side of the bundle fell.
“5” Falling was not confirmed at all.
As shown in the results of Table 1 and Table 2, the examples of the sanitary tissue package according to the invention have an evaluation of “4” or more in each test, whereas the comparative examples have an evaluation of “1” to “3”. As described above, the sanitary tissue package according to the invention is excellent in the take-out property and falling prevention of the sanitary tissues.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2018-133701 | Jul 2018 | JP | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/JP2019/023216 | 6/12/2019 | WO | 00 |
