U.S. patent application number 14/007385 was filed with the patent office on 2014-03-20 for method for producing wet tissue package.
This patent application is currently assigned to Uni-Charm Corporation. The applicant listed for this patent is Takeshi Bando. Invention is credited to Takeshi Bando.
Application Number | 20140075892 14/007385 |
Document ID | / |
Family ID | 46930623 |
Filed Date | 2014-03-20 |
United States Patent
Application |
20140075892 |
Kind Code |
A1 |
Bando; Takeshi |
March 20, 2014 |
METHOD FOR PRODUCING WET TISSUE PACKAGE
Abstract
A method for producing a wet tissue package by which a storage
portion for wet tissues which have been used can be easily
produced, and wet tissues stored in a package main body can be
prevented from drying. A method for producing a wet tissue package
provided with a package main body having an opening portion, a lid
member to cover the opening portion, and a used wet tissue storage
portion, wherein the method is provided with an opening portion
formation step, an attachment step for attaching the lid member and
an adhesive material, a folding back step for wrapping a plurality
of wet tissues, a first sealing portion formation step for forming
a first sealing portion and a first sealing extension portion, and
a second sealing portion formation step for forming a second
sealing portion and also forming the used wet tissue storage
portion by joining the second sealing portion and the first sealing
extension portion by the adhesive material.
Inventors: |
Bando; Takeshi; (Kagawa,
JP) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Bando; Takeshi |
Kagawa |
|
JP |
|
|
Assignee: |
Uni-Charm Corporation
Ehime
JP
|
Family ID: |
46930623 |
Appl. No.: |
14/007385 |
Filed: |
March 13, 2012 |
PCT Filed: |
March 13, 2012 |
PCT NO: |
PCT/JP2012/056467 |
371 Date: |
November 27, 2013 |
Current U.S.
Class: |
53/461 ; 53/480;
53/485 |
Current CPC
Class: |
B65D 83/0888 20130101;
B65B 11/12 20130101; B65D 75/5894 20130101; B65B 25/14 20130101;
B65B 25/145 20130101 |
Class at
Publication: |
53/461 ; 53/480;
53/485 |
International
Class: |
B65B 11/12 20060101
B65B011/12; B65B 25/14 20060101 B65B025/14 |
Foreign Application Data
Date |
Code |
Application Number |
Mar 29, 2011 |
JP |
2011-073664 |
Claims
1. A method for producing a wet tissue including: a package main
body in which a plurality of wet tissues is accommodated, an
opening portion that is formed on the package main body, a lid
member that is attached to an outer surface of the package main
body to cover the opening portion, and a used wet tissue storage
portion that is capable of storing a used wet tissue therein, the
method comprising steps of: forming the opening portion on a
strip-shaped sheet member; attaching the lid member to the sheet
member in a manner so that the opening portion is covered from a
top surface side or a bottom surface side of the sheet member, and
attaching an adhesive material to an upstream side and/or a
downstream side of a position to which the lid member is attached;
disposing the plurality of wet tissues on a surface of the
strip-shaped sheet member at a side to which the lid member and the
adhesive material are not attached; folding back each of a pair of
side edges along a direction of flow of the sheet member with the
plurality of wet tissues being disposed, to a side where the
plurality of wet tissues is disposed so as to wrap around the
plurality of wet tissues; forming a first seal portion that extends
in the direction of flow of the sheet member and a first seal
extending portion that extends from the first seal portion to a
direction crossing a direction in which the pair of side edges
extends by bonding the pair of side edges of the folded sheet
member with each other; and forming a pair of second seal portions
by bonding an upstream side and a downstream side of a position
where the plurality of wet tissues is disposed on the sheet member
following the step of forming the first seal portion in such a
manner as to extend in a width direction of the sheet member, and
forming the used wet tissue storage portion by bonding the second
seal portions with the first seal extending portion by means of the
adhesive material.
2. The method for producing the wet tissue package according to
claim 1, wherein in the step of forming the first seal portion, the
first seal portion is formed at a position off a center in the
width direction of the sheet member.
3. The method for producing the wet tissue package according to
claim 1, wherein in the step of attaching the lid member, a hot
melt adhesive agent is used as the adhesive material.
4. The method for producing the wet tissue package according to
claim 1, wherein an adhesive tape is used as the adhesive material
in the step of attaching the lid member, the adhesive tape
including a thermoplastic sheet material, and a tackiness agent
that is applied to the surface of the sheet material, with which
the sheet member is in contact.
Description
TECHNICAL FIELD
[0001] The present invention relates to a method for producing a
wet tissue package. More particularly, the present invention
relates to a method for producing a wet tissue package including a
package main body, and a used wet tissue storage portion that is
provided on the outer surface of the package main body.
BACKGROUND ART
[0002] Heretofore, pocket-sized tissue packs in which a plurality
of sheets of compactly folded tissue paper is accommodated in a
bag, and wet tissue packages in which wet tissues are accommodated
in a bag in place of sheets of tissue paper are known of. Such a
pocket-sized tissue pack or wet tissue package are carried and used
by a user when, for example, the user goes outside.
[0003] In a case where the user uses the pocket-sized tissue pack
or wet tissue package outside and finds no garbage box or the like
into which used tissue paper or wet tissue may be discarded, it is
inconvenient for the user to dispose of the used tissue or wet
tissue.
[0004] Accordingly, there has been proposed a package that is
provided with a used-tissue-paper storage portion in which used
tissue paper is stored (e.g., refer to Patent Document 1).
[0005] The package proposed in the Patent Document 1 includes a
package main body in which tissue paper is accommodated, and a
pocket portion that is provided on the package main body. In the
package, the package main body is constructed by wrapping the
tissue paper with a strip-shaped sheet material, then by
overlapping one end side and the other end side of the sheet
material in the width direction, and by bonding openings formed at
both ends of the sheet material in the longitudinal direction while
the one end side and the other end side of the sheet material in
the width direction overlapped. Also, the used tissue storage
portion is formed by folding back a portion of the sheet material
that is positioned on the outer side in an overlapping state, and
by bonding the both ends in the longitudinal direction of the
folded sheet material with the package main body.
[0006] [Patent Document 1] Japanese Utility Model Publication No.
3079883
DISCLOSURE OF THE INVENTION
Problems to be Solved by the Invention
[0007] In the package proposed in Patent Document 1, the package
main body is formed by bonding the both ends in the longitudinal
direction of the sheet material while the one end side and the
other end side of the sheet material in the width direction is
overlapped, and the one end side and the other end side in the
width direction of the sheet material are not bonded together.
Therefore, in the technique disclosed in Patent Document 1, the
sealing efficiency inside the package main body is insufficient. If
this technique is applied to a wet tissue package, the wet tissues
accommodated in the package main body will dry out over time.
[0008] Consequently, it is an object of the present invention to
provide a method for producing a wet tissue package that
facilitates the production of a used wet tissue storage portion
that is provided to a package main body and that is capable of
preventing wet tissues accommodated in the package main body from
drying out.
Means for Solving the Problems
[0009] The present invention relates to a method for producing a
wet tissue package including: a package main body in which a
plurality of wet tissues is accommodated; an opening portion that
is formed on the package main body; a lid member that is attached
to an outer surface of the package main body to cover the opening
portion; and a used wet tissue storage portion that is capable of
storing a used wet tissue therein. The method includes steps of:
forming the opening portion on a strip-shaped sheet member;
attaching the lid member to the sheet member in a manner so that
the opening portion is covered from a top surface side or a bottom
surface side of the sheet member, and attaching an adhesive
material to an upstream side and/or a downstream side of a position
to which the lid member is attached; disposing the plurality of wet
tissues on a surface of the strip-shaped sheet member at a side to
which the lid member and the adhesive material are not attached;
folding back each of a pair of side edges along a direction of flow
of the sheet member with the plurality of wet tissues being
disposed, to a side where the plurality of wet tissues is disposed
so as to wrap around the plurality of wet tissues; forming a first
seal portion that extends in the direction of flow of the sheet
member and a first seal extending portion that extends from the
first seal portion to a direction crossing a direction in which the
pair of side edges extends by bonding the pair of side edges of the
folded sheet member with each other; and forming a pair of second
seal portions by bonding an upstream side and a downstream side of
a position where the plurality of wet tissues is disposed on the
sheet member following the step of forming the first seal portion
in such a manner as to extend in a width direction of the sheet
member, and forming the used wet tissue storage portion by bonding
the second seal portions with the first seal extending portion by
means of the adhesive material.
[0010] In the step of forming the first seal portion, the first
seal portion is preferably formed at a position off a center of the
sheet member in the width direction.
[0011] In the step of attaching the lid member, a hot melt adhesive
agent is preferably used as the adhesive material.
[0012] Also, it is preferable that an adhesive tape is used as the
adhesive material in the step of attaching the lid member, the
adhesive tape including a thermoplastic sheet material, and a
tackiness agent that is applied to a surface of the sheet material
with which the sheet member is in contact.
Effects of the Invention
[0013] According to the method for producing the wet tissue package
of the present invention, it is possible to facilitate the
production of a used wet tissue storage portion that is provided to
the package main body, and to prevent wet tissues accommodated in
the package main body from drying out.
BRIEF DESCRIPTION OF THE DRAWINGS
[0014] FIG. 1 is a perspective view illustrating one embodiment of
the wet tissue package produced by the method for producing wet
tissue package according to the present invention, and the view
illustrates the wet tissue package as seen from the bottom surface
side;
[0015] FIG. 2 is a plan view of the wet tissue package illustrated
in FIG. 1;
[0016] FIG. 3 is a cross-sectional view taken along line A-A in
FIG. 1;
[0017] FIG. 4 is a cross-sectional view taken along line B-B in
FIG. 1;
[0018] FIG. 5 is a cross-sectional view taken along line C-C in
FIG. 1;
[0019] FIG. 6 is a side view illustrating the use of the wet tissue
package illustrated in FIG. 1;
[0020] FIG. 7 is a schematic view illustrating production steps of
the wet tissue package in a first embodiment;
[0021] FIG. 8 is a perspective view illustrating the steps of FIG.
7;
[0022] FIG. 9 illustrates steps of a method for producing a wet
tissue package of a second embodiment;
[0023] FIG. 10 is a view illustrating an example modification to
the center seal extending portion;
[0024] FIG. 11 is a view illustrating an example modification to
the center seal extending portion; and
[0025] FIG. 12 is a view illustrating an example modification to
the center seal extending portion.
EXPLANATION OF REFERENCE NUMERALS
[0026] 1 Wet tissue package
[0027] 10 package main body
[0028] 11 sheet member
[0029] 13 center seal portion (first seal portion)
[0030] 14 end seal portion (second seal portion)
[0031] 15 wet tissue accommodating portion
[0032] 20 wet tissue
[0033] 22 adhesive agent (adhesive material)
[0034] 22A adhesive tape
[0035] 25 used wet tissue
[0036] 30 used wet tissue storage portion
[0037] 31 center seal extending portion
[0038] 311 side portion
[0039] S2 opening portion forming step
[0040] S3 attaching step
[0041] S4 wet tissue disposing step
[0042] S5 folding back step
[0043] S6 center seal portion forming step (first seal portion
forming step)
[0044] S7 end seal portion forming step (second seal portion
forming step)
PREFERRED MODE FOR CARRYING OUT THE INVENTION
[0045] Hereinafter, some preferred embodiments of the present
invention will be described with reference to the drawings.
[0046] First, one embodiment of the wet tissue package produced
according to the method for producing the wet tissue package of the
present invention will be described with reference to FIGS. 1 to
6.
[0047] As illustrated in FIGS. 1 to 3, the wet tissue package of
the first embodiment includes a package main body 10, a plurality
of wet tissues that is accommodated in layers in the package main
body 10, a closure flap 21 that is attached on the outer surface of
the package main body 10 as a lid member, and a used wet tissue
storage portion 30 that is capable of storing used wet tissues
therein.
[0048] As illustrated in FIGS. 3 to 5, the package main body 10 is
constituted of a sheet member 11. More specifically, the package
main body 10 is constituted by folding back the sheet member 11 so
that the plurality of wet tissues 20 is wrapped around and by
bonding a predetermined portion of the folded sheet member 11.
[0049] As illustrated in FIGS. 1 and 2, the package main body 10
has a top surface 10a and a bottom surface 10b, and has a
substantially rectangular bag-like 3-dimensional shape in a plan
(top) view thereof.
[0050] As illustrated in FIGS. 1 to 3, the package main body 10 is
constructed of an opening portion 12, from which the wet tissues 20
are taken out, a center seal portion 13 as a first seal portion, a
pair of end seal portions 14 as a pair of second seal portions, and
a wet tissue accommodating portion 15 (refer to FIG. 3) in which
the plurality of wet tissues 20 is accommodated.
[0051] As illustrated in FIG. 2, the opening portion 12 is provided
at a substantially central position of the top surface 10a of the
package main body 10. This opening portion 12 is formed by cutting
out a portion of the sheet member 11 constituting the package main
body 10 in a substantially circular shape.
[0052] As illustrated in FIGS. 1 and 5, the center seal portion 13
is disposed on the bottom surface 10b of the package main body 10,
and extends along the longitudinal direction Ld of the package main
body 10. Also, the center seal portion 13 is disposed at a position
off the center of the bottom surface 10b in the width direction Wd
of the package main body 10.
[0053] The center seal portion 13 is formed by bonding the pair of
first side edges 111 (refer to FIG. 8 described later) of the sheet
member 11 with each other. More specifically, the center seal
portion 13 is formed by folding the sheet member 11 to wrap around
the layered plurality of wet tissues 20, overlapping the pair of
first side edges 111 of the folded sheet member 11, and bonding the
overlapping portion together.
[0054] As illustrated in FIGS. 1 to 3, the pair of end seal
portions 14 constitutes side portions extending along the width
direction Wd of the package main body 10. Each of the pair of end
seal portions 14 is formed by bonding each pair of second side
edges 112 that extends in the direction crossing to the pair of
first side edges 111 of the sheet member 11 with the center seal
portion 13 being formed.
[0055] As illustrated in FIGS. 3 and 5, the wet tissue
accommodating portion 15 is constituted of a closed space formed by
bonding the sheet member 11 at the center seal portion 13 and the
pair of end seal portions 14.
[0056] As illustrated in FIGS. 3 to 5, the sheet member 11
constituting the package main body 10 includes a gas-and
liquid-impermeable barrier layer 113, and a sealant layer 114
constituted of a thermoplastic resin film.
[0057] Examples of the gas-and liquid-impermeable member
constituting the barrier layer 113 include those using a single
layer or multiple layers of materials such as an aluminum foil, a
polyethylene-terephthalate (PET) film, and film materials formed by
depositing aluminum on a PET film.
[0058] The thermoplastic resin film constituting the sealant layer
114 is constituted of a resin that is capable of melting and fusing
under given temperature and pressure conditions. Examples of the
thermoplastic resin constituting the sealant layer 114 include
polyethylene, polypropylene, polymer alloys of polypropylene and
polystyrene, polymer alloys of polyethylene, polypropylene and
polystyrene, blended resins of polypropylene and polyethylene, and
blended resins of polypropylene and elastomer.
[0059] As illustrated in FIGS. 3 to 5, in this embodiment the
package main body 10 is constituted by disposing the sheet member
11 so that the sealant layer 114 forms the inner surface thereof.
Further, in this embodiment, the center seal portion 13 and the
pair of end seal portions 14 are formed by bonding each one of the
sealant layers 114 forming the inner surface of the package main
body 10 through a thermal compression (heat seal) treatment.
[0060] Next, the used wet tissue storage portion 30 will be
described.
[0061] As illustrated in FIGS. 1 and 3, the used wet tissue storage
portion 30 is provided on the outer surface (bottom surface 10b)
side of the package main body 10.
[0062] In the first embodiment, the used wet tissue storage portion
30 is constituted of the center seal portion 13, a center seal
extending portion 31 as the first seal extending portion, and the
sheet member 11 constituting the bottom surface 10b of the package
main body 10.
[0063] As illustrated in FIGS. 1, 3 and 5, the center seal
extending portion 31 extends along the bottom surface 10b of the
package main body 10 and toward the other side in the width
direction Wd of the package main body 10 (i.e., the side opposite
to the side where the center seal portion 13 is positioned in the
width direction Wd of the package main body 10). The position of
the edge portion 312 of the center seal extending portion 31
substantially coincides with the position of the side edge of the
other side in the width direction Wd of the bottom surface 10b of
the package main body 10 in the height direction Hd of the package
main body 10. The position of the pair of side portions 311
substantially coincides with the position of the pair of end seal
portions 14 in the height direction Hd of the package main body
10.
[0064] As illustrated in FIGS. 1 and 5, the center seal extending
portion 31 is formed in such a manner that one layer of the
double-layered sheet member 11 constituting the center seal portion
13 extends from the center seal portion 13 to the direction
crossing the direction in which the first side edge 111 is
extending (in the longitudinal direction Ld of the package main
body 10).
[0065] As illustrated in FIG. 3, the pair of side portions 311 of
the center seal extending portion 31 is adhered to the pair of end
seal portions 14 through a hot melt adhesive agent 22 as an
adhesive material.
[0066] As illustrated in FIGS. 1 and 5, the edge portion 312 of the
center seal extending portion 31 can be spaced apart from the
bottom surface 10b of the package main body 10 except in the area
of the pair of side portions 311.
[0067] Between the surface facing the bottom surface 10b side of
the package main body 10 in the center seal portion 13 and the
center seal extending portion 31, and the bottom surface 10b of the
package main body 10, the used wet tissue storage portion 30 is
formed which is capable of storing used wet tissues.
[0068] The wet tissues are formed in a substantially rectangular
shape. Each of the plurality of wet tissues 20 is layered in a
state of being folded into a predetermined shape and accommodated
in the package main body 10 (refer to FIGS. 3 and 5).
[0069] As illustrated in FIG. 2, the closure flap 21 has a shape in
which one end edge in the longitudinal direction of the
substantially rectangular shape is formed in an arc shape. This
closure flap 21 is peelably adhered to a peripheral edge of the
opening portion 12 at the top surface 10a of the package main body
10.
[0070] The closure flap 21 is constituted of those materials which
are obtained by applying a re-adhesive resin, such as an acrylic
resin, to the surface that is in contact with the package main body
10 of a synthetic resin film such as polyethylene, polypropylene,
polyester, polyamide, polyvinyl chloride, or the like. Also, the
closure flap 21 may have a multiple layered structure, in which two
or more layers of the aforesaid synthetic resin films are
layered.
[0071] FIG. 6 is a side view illustrating the use of the wet tissue
package 1 according to the first embodiment.
[0072] In the wet tissue package 1 of the first embodiment, in a
state where a used wet tissue 25 is not stored in the used wet
tissue storage portion 30, as illustrated in FIG. 1, the center
seal extending portion 31 is positioned along the bottom surface
10b of the package main body 10. In other words, the used wet
tissue storage portion 30 is in the closed state.
[0073] After a user uses the wet tissue 20, the used wet tissue 25
is stored in the used wet tissue storage portion 30. To store the
used wet tissue 25 in the used wet tissue storage portion 30, the
user pushes the used wet tissue 25 into the space between the
bottom surface 10b of the package main body 10 and the center seal
extending portion 31, from the side of the edge portion 312 of the
center seal extending portion 31. Then, the edge portion 312 of the
center seal extending portion 31 and the bottom surface 10b of the
package main body 10 are spaced from each other, which allows the
used wet tissue 25 to be stored in the used wet tissue storage
portion 30.
[0074] Next, with reference to FIGS. 7 and 8, a description will be
made of the first embodiment, which is one preferred embodiment of
the method for producing the wet tissue package 1 according to the
present invention. FIG. 7 is a schematic view illustrating the
method for producing the wet tissue package 1 according to the
first embodiment. FIG. 8 is a perspective view illustrating steps
of the method for producing the wet tissue package according to the
first embodiment. It should be noted that a reversed-pillow
wrapping machine is taken as an example in the first embodiment,
and when a normal-pillow wrapping machine is used, the inside and
the outside will be reversed in all the steps.
[0075] As illustrated in FIGS. 7 and 8, the method for producing
the wet tissue package 1 of the first embodiment includes a feeding
step S1, an opening portion forming step S2, a (closure flap)
attaching step S3, a wet tissue disposing step S4, a folding back
step S5, a center seal portion forming step S6 that is a first seal
portion forming step, and an end seal portion forming step S7 that
is a second seal portion forming step.
[0076] In the feeding step S1, the strip-shaped sheet member 11 is
fed out from a feeding unit 41. Here, the strip-shaped sheet member
11 is fed out so that the sealant layer 114 thereof faces up.
[0077] In the opening portion forming step S2, in a first cutting
unit 42, the opening portion 12 is formed on the strip-shaped sheet
member 11.
[0078] In the attaching step S3, the hot melt adhesive agent 22 as
the closure flap 21 and the adhesive material are attached from the
bottom surface side of the strip-shaped sheet member 11, on which
the opening portion 12 is formed. The closure flap 21 is attached
by using a closure flap attaching device (not illustrated), so that
the opening portion 12 is covered over. The hot melt adhesive agent
22 is intermittently discharged from a hot melt gun 46 and applied
to the predetermined position at the upstream side and the
downstream side of the position of the strip-shaped sheet member
11, to which the closure flap 21 is attached (i.e., the position
overlapping the pair of side portions 311 of the center seal
extending portion 31, described later).
[0079] As for the hot melt adhesive agent 22, it is preferable to
use those which are solidified and lose adhesive property (tack
property) in a short period of time after they are applied to the
sheet member 11. Specifically, the hot melt adhesive agent 22 can
preferably employ those having thermoplasticity, such as
olefin-based or rubber-based adhesives.
[0080] In the wet tissue disposing step S4, the plurality of folded
and layered wet tissues 20 are disposed on the top surface side of
the strip-shaped sheet member 11, the opening portion 12 of which
is covered by the closure flap 21.
[0081] In the folding back step S5, the strip-shaped sheet member
11, in a state where the wet tissues 20 are disposed on the top
surface side thereof, is folded back so that the wet tissues are
wrapped around with the sheet member 11. More specifically, each of
the pair of first side edges 111 which is along the direction of
flow of the strip-shaped sheet member 11 is folded back to a side
where the wet tissues 20 are disposed (the top surface side) so
that the wet tissues 20 are wrapped around.
[0082] Then, in the center seal portion forming step S6, the center
seal portion 13 and the center seal extending portion 31 are formed
in a first heat sealing unit 43. More specifically, in the center
seal portion forming step S6, a thermal compression treatment by
the first heat sealing unit 43 is applied to the strip-shaped sheet
member 11 that is folded back and overlapping so that one first
side edge 111 of the pair of first side edges 111 extends. With
this arrangement, at the portion where the sheet member 11 is
overlapping, the sheet member 11 is bonded together, in which the
sealant layers 114 are fused to and overlap each other. Then, the
center seal portion 13 that extends in the direction of flow of the
sheet member 11 is formed at the overlapping portion of sheet
member 11. Also, the center seal extending portion 31 is formed
with a layer of the sheet member 11 extending from the center seal
portion 13.
[0083] Here, as illustrated in FIG. 8, the center seal portion 13
is formed at a position off the center in the direction crossing
the direction of flow of the strip-shaped sheet member 11 (width
direction). Also, in a state where the center seal portion 13 and
the center seal extending portion 31 are formed through the center
seal portion forming step S6, the upstream side and the downstream
side in the direction of flow of the sheet member 11 are open
(refer to FIG. 8).
[0084] In the end seal portion forming step S7, the pair of end
seal portions 14 and the used wet tissue storage portion 30 are
formed in a second heat sealing unit 44. More specifically, in the
end seal portion forming step S7, a thermal compression treatment
is applied by the second heat sealing unit 44 to the strip-shaped
sheet member 11 where the center seal portion 13 and the center
seal extending portion 31 are formed, at the upstream side and the
downstream side of the portion where the wet tissues 20 are
disposed so that the treatment to each side extends in the width
direction of sheet member 11. Here, as illustrated in FIG. 8, the
hot melt adhesive agent 22 is applied to the position of the sheet
member 11, to which the thermal compression treatment is to be
applied by the second heat sealing unit 44 (the position
overlapping the pair of side portions 311, described later).
[0085] With this arrangement, open portions in the upstream side
and the downstream side in the direction of flow of the sheet
member 11 are bonded to form the pair of end seal portions 14, and
thereby forming the package main body 10. Furthermore, the hot melt
adhesive agent 22 that is applied to the pair of side portions 311
is molten by the thermal compression treatment in the second heat
sealing unit 44. With this molten hot melt adhesive agent 22, the
pair of side portions 311 of the center seal extending portion 31
is adhered to the pair of end seal portions 14 (refer to FIG.
4).
[0086] As a result, the center seal extending portion 31 is sloped
towards the other side in the width direction of the sheet member
11 (i.e., the side opposite to the side where the center seal
portion 13 is formed) and disposed along the bottom surface 10b of
the package main body 10.
[0087] In this way, the center seal portion 13, the center seal
extending portion 31, and the bottom surface 10b of the package
main body 10 configure the used wet tissue storage portion 30.
[0088] Also, in the end seal portion forming step S7, a series of
wet tissue packages 1, each of which has the pair of end seal
portion 14 and the used wet tissue storage portion 30, is cut in a
second cutting unit 45, and a wet tissue package 1 is produced.
More specifically, the series of wet tissue packages 1 is cut in
the width direction at the portion where the end seal portion 14 is
formed.
[0089] In the end seal portion forming step S7, the thermal
compression treatment by the second heat sealing unit 44 and the
cutting by the second cutting unit 45 are substantially
simultaneously executed. Furthermore, it is desirable that the
cutting by the second cutting unit 45 is executed in the portions
of the pair of end seal portions 14 to which the hot melt adhesive
agent 22 is not applied.
[0090] According to the above described method for producing the
wet tissue package 1, the following advantages are achieved.
[0091] (1) Through the center seal portion forming step S6, the
center seal portion 13 and the center seal extending portion 31 are
formed. Through the end seal portion forming step S7, the end seal
portion 14 is formed and the used wet tissue storage portion 30 is
formed by the center seal portion 13, the center seal extending
portion 31, and the bottom surface 10b of the package main body 10.
Therefore, with no separate step of forming the used wet tissue
storage portion 30, it is possible to produce the wet tissue
package 1 having the used wet tissue storage portion 30, which
improves the production efficiency of the wet tissue package 1.
Further, since the used wet tissue storage portion 30 can be sealed
with the center seal portion 13 and the pair of end seal portions
14, it is possible to prevent wet tissues 20 accommodated in the
package main body 10 from drying out.
[0092] (2) The hot melt adhesive agent 22 that is used for adhering
the pair of end seal portions 14 to the center seal extending
portion 31 in the end seal portion forming step S7 is attached to
the sheet member 11 with the hot melt gun 46 in the attaching step
S3, in which the closure flap 21 is attached. With this
arrangement, the hot melt adhesive agent 22 can be applied to the
sheet member 11 utilizing the step of attaching the closure flap
21. Therefore, with no separate step of attaching the hot melt
adhesive agent 22 to the sheet member 11, it is possible to form
the used wet tissue storage portion 30, in which the pair of end
seal portions 14 and the pair of side portions 311 of the center
seal extending portion 31 are adhered together.
[0093] (3) As an adhesive material, the hot melt adhesive agent 22
is used. With this arrangement, in the attaching step S3, it is
possible to cause the adhesive material that is applied to the
sheet member 11 to become solid and lose the tackiness in a short
period of time. Therefore, in the steps from the attaching step S3
to the end seal portion forming step S7, it is possible to prevent
adhering of the adhesive material to the processing equipment,
which further improves the production efficiency of the wet tissue
package 1.
[0094] (4) The center seal portion 13 is disposed at a position off
the center of the bottom surface 10b of the package main body 10.
With this arrangement, the volume of the used wet tissue storage
portion 30 including the center seal extending portion 31 can be
increased, and thus a larger volume of used wet tissues can be
accommodated.
[0095] (5) The sheet member 11 is constituted of two layers, i.e.,
the barrier layer 113 and the sealant layer 114, and the sealant
layer 114 constitutes the package main body 10 as an inner surface.
With this arrangement, it is possible to facilitate the formation
of the center seal portion 13 and the end seal portion 14 by a
thermal compression treatment. Therefore, with no separate use of
tackiness agents, adhesives, or the like, the center seal portion
13 and the end seal portion 14 can be formed, and an effective
production of the wet tissue package 1 is thus achieved.
[0096] Next, with reference to FIG. 9, a description will be made
of a second embodiment of the method for producing the wet tissue
package according to the present invention. FIG. 9 is a perspective
view illustrating the steps of the method for producing the wet
tissue package according to the second embodiment. It should be
noted that in the description of the second embodiment, the same
reference numbers are link to the same construction requisites and
so explanations thereof are omitted or simplified.
[0097] In the method for producing the wet tissue package according
to the second embodiment, the adhesive material used in the
attaching step S3 differs from the first embodiment.
[0098] In the second embodiment, in the attaching step S3, an
adhesive tape 22A is used as the adhesive material. The adhesive
tape 22A includes a sheet material and a tackiness agent applied to
the surface that is in contact with the sheet member 11 of the
sheet material. Since the sheet material is required to have
thermal adhesive properties, the resin used for the sealant layer
will be used. Further, the tackiness agent that is applied is not
necessarily to be re-peelable, and it is preferable to use an
acrylic-based or rubber-based tackiness agent.
[0099] The adhesive tape 22A is attached to the sheet member 11 by
the closure flap attaching device for attaching the closure flap 21
to the sheet member 11 simultaneously with the closure flap 21.
[0100] According to the method for producing the wet tissue package
of the second embodiment, in addition to the above described
advantages (1), (2), (3), (4), and (5), the following advantages
are achieved.
[0101] (6) The adhesive tape 22A is used as an adhesive material.
With this arrangement, the adhesive tape 22A can be attached to the
sheet member 11 simultaneously with the closure flap 21 by the
closure flap attaching device. Therefore, the adhesive tape 22A can
be attached to the sheet member 11 utilizing an existing closure
flap attaching device, which further improves the production
efficiency of the wet tissue package 1.
[0102] Furthermore, by using the adhesive tape 22A that is formed
in a uniform thickness as the adhesive material, it is possible to
make the thickness of the adhesive material to be attached to the
sheet member 11 uniform. Therefore, the sheet member 11 can be
stably adhered at the pair of end seal portions, which further
enhances the quality of the wet tissue package.
[0103] (7) The adhesive tape 22A includes a sheet material having
thermal adhesive properties. With this arrangement, in the
attaching step S3, it is possible to be in a state where an outer
surface side of the adhesive tape 22A that is attached to the sheet
member 11 has no adhesive properties in an unheated state.
Therefore, in the steps from the attaching step S3 to the end seal
portion forming step S7, it is possible to prevent adhering of the
adhesive tape 22A to the processing equipment, which further
improves the production efficiency of the wet tissue package 1.
[0104] Although the preferred embodiments of the method for
producing the wet tissue package of the present invention have been
described above, the present invention is not limited thereto and
can be implemented in various modes.
[0105] For example, in the first embodiment and the second
embodiment, the center seal portion 13 is disposed at a position
off the center in the width direction Wd of the package main body
10. However, the present invention is not limited thereto. In other
words, as illustrated in FIG. 10, the center seal portion 13 may be
formed at a position close to the side edge of the package main
body 10. Also, as illustrated in FIG. 11, the center seal portion
13 may be formed on a side surface of the package main body 10.
[0106] Furthermore, although in the first embodiment and the second
embodiment, the center seal extending portion 31 is constituted by
extending a single layer of the sheet member 11 from the center
seal portion 13, the present invention is not limited thereto. In
other words, as illustrated in FIG. 12, the center seal extending
portion 31 may be constituted by extending double layers of the
sheet member 11 from the center seal portion 13.
[0107] Furthermore, in the first embodiment and the second
embodiment, the present invention is applied to the wet tissue
package having a rectangular plan view shape. However, the present
invention is not limited thereto. In other words, the present
invention may be applied to the wet tissue package having a square
plan view shape.
[0108] Furthermore, in the first embodiment and the second
embodiment, in the center seal portion forming step S6, the center
seal portion 13 is formed at a position off the center in the width
direction of the sheet member 11. However, this invention is not
limited thereto. In other words, the center seal portion may be
formed at the central portion in the width direction of the sheet
member.
[0109] Furthermore, in the first embodiment and the second
embodiment, in the attaching step S3, the adhesive material is
attached to the upstream side and the downstream side of the
position in the sheet member 11, to which the closure flap 21 is
attached (the both sides of the pair of side portions 311 of the
center seal extending portion 31). However, the present invention
is not limited thereto. In other words, in the attaching step S3,
the adhesive material may only be attached to either the upstream
side or to the downstream side of the position on the sheet member
11 to which the closure flap 21 is attached.
* * * * *