JP3149158B2 - Absorbent article packaging structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging structure for absorbent articles, and more particularly, to a sanitary napkin packaging structure in which the entire surface of the packaging material is subjected to a peeling treatment, and the sealing material of the packaging material is opened when opened. The present invention relates to an absorbent article packaging structure that can be easily opened.

[0002]

BACKGROUND OF THE INVENTION As absorbent articles, there are sanitary napkins and the like. Usually, such sanitary napkins fix the napkin to shorts and prevent displacement during use. When the sanitary napkin is stored, a release paper is adhered to the adhesive layer in order to protect the adhesive layer. In such sanitary napkins, the release paper must be peeled and discarded when used, so that the disposal of the release paper is troublesome, and the toilet paper is clogged when discarded. There is.

Therefore, there has been proposed a sanitary napkin packaging structure which protects the adhesive layer of the sanitary napkin without using release paper by using a packaging material having an inner surface peeled off. Is advantageous in that the sanitary napkin can be sanitarily disposed of by sanitizing the packaging material when the sanitary napkin is disposed of. Further, in the packaging structure, since it is not necessary to perform phase matching and the manufacturing process is simple, a packaging material whose entire inner surface is subjected to a peeling treatment is mainly used.

However, when a packaging material whose entire inner surface is peeled off is used, there is a problem that it is difficult to seal the packaging material by heat sealing under a normal heating condition. In a packaging structure heat-sealed by increasing the height, the packaging material must be broken at the time of opening, and there is a problem that the packaging material cannot be used for disposal of sanitary napkins.

Accordingly, it is an object of the present invention to provide a packaging structure for an absorbent article which has a simple manufacturing process, is well sealed, and is easy to open.

[0006]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies in order to solve the above-mentioned problems, and as a result, the sealing material has been formed by partially heat-sealing the packaging material using a heat-sealing apparatus or the like. It has been found that such a packaging structure can achieve the above object.

[0007] The present invention has been made based on the above findings, and comprises an absorbent article and a rectangular wrapping material for individually mounting the absorbent article, and is provided on the non-skin contact surface side of the absorbent article. The adhesive layer and the inner surface of the packaging material are peelably adhered to each other, and the packaging material is bent in the longitudinal direction thereof.
The folded side edges of the longitudinal direction are fused.
To form a seal portion, and the length of the
One edge and the other edge in the direction are one edge
In the packaging structure of an absorbent article that is sealed by being positioned on the side of the absorbent article, the packaging material is formed of a polyolefin film or a polyester film, and the entire inner surface is subjected to a peeling treatment. The packaging material has a tear strength of 50 g or more and a bulk softness of 3
0 g / 15 mm or less, and the seal portion is formed by partially fusing the packaging material with a heat fusing device, and the seal portion has a seal strength of 10 g / 10 mm to 15 mm.
0 g / 10 mm der is, one of the edge portions and the other of the
The edge is made by the same partial fusion as the above-mentioned seal or
The bondable tab tape is to provide a packaging structure of the absorbent article which is characterized that you have been sealed.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a sanitary napkin according to a first embodiment of the present invention;

FIG. 1 is a perspective view showing one form of a sanitary napkin packaging structure of the present invention, and FIG. 2 is a perspective view showing a bottom surface of the sanitary napkin in the packaging structure shown in FIG. 3 is a perspective view of a packaging material in the packaging structure shown in FIG. FIG. 4 is a schematic perspective view showing a form in the middle of folding the sanitary napkin into three parts.
FIG. 6 is a schematic perspective view showing a packaging mode of the folded sanitary napkin with the packaging material, and FIG. 6 is a partially enlarged view showing a heat-sealed portion of the sanitary napkin packaging structure shown in FIG. FIG. 2 is a schematic view showing an outline of a method for measuring a seal strength. FIG. 8 is a schematic perspective view showing a main part of a continuous packaging mode of the sanitary napkin with the packaging material folded in three.

A sanitary napkin packaging structure 1 of the present embodiment shown in FIG. 1 comprises a sanitary napkin 10 and a rectangular packaging material 20 for individually mounting the sanitary napkin 10, and a non-skin contact surface of the sanitary napkin 10. 12 and the packaging material 20
Of the packaging material 20
Are sealed by seal portions 2 and 2 ′ provided by fusing a part.

More specifically, as shown in FIGS. 1 to 5, the sanitary napkin packaging structure 1 includes a sanitary napkin 10 having a front portion 13, a longitudinal portion, and a central portion. 14 and the rear part 15, the two bent parts 17 are substantially equally divided into three, and in the order of the rear part 15 and the front part 13, the central part 14 is folded into three on the skin contact surface 11 side,
It is individually wrapped by the wrapping material 20. Also,
The packaging material 20 is bent toward the longitudinal direction, the left and right side edges 22 folded is fused, thereby sealing portion 2 is formed. Furthermore, on
Serial between both longitudinal end edges 23, 24 of the packaging material 20, one end edge 23 (downward in the packaging structure 1, the edge portion located directly above the sanitary napkin 10), the other edge 2
4 (the upper edge of the packaging structure 1) is fused to the inner surface of the packaging material 20 , thereby forming the seal portion 2 'and the edge portion 24 forming the knob portion 3. Have been. Then, when using the sanitary napkin 10, the knob portion 3 is pulled up in the direction of the arrow shown in FIG.
The sanitary napkin can be taken out by peeling off the seal portions 2 and 2 ′ and used for use. The sanitary napkin 10 packaged by the packaging structure of the present invention has a skin contact surface 11 made of a liquid-permeable sheet material and a non-skin contact surface 12 as shown in FIGS. Are normal sanitary napkins each formed of a liquid-impermeable sheet material and further having a liquid-retentive absorber between the skin contact surface 11 and the non-skin contact surface 12.

Here, the front part 13 is a part located in the front direction of the user when using the sanitary napkin. As shown in FIG. 2, an adhesive layer 16 is provided on each of the front portion 13 and the central portion 14 of the sanitary napkin 10, and the adhesive layer 16 is
0 is adhered and protected on the inner surface.

The pressure-sensitive adhesive layer 16 is formed by applying a pressure-sensitive adhesive on the non-skin contact surface 12 or by peeling the packaging material 2.
0, and then transferred onto the non-skin contact surface 12 or the like. As the pressure-sensitive adhesive forming the pressure-sensitive adhesive layer, for example, a pressure-sensitive adhesive containing a styrene-based block polymer, a tackifier, and a softener as main components and maintaining a two-phase block structure of a styrene phase and a rubber phase is used.

The styrene-based block polymer includes styrene-ethylene-butylene-styrene block copolymer (SEBS), styrene-isoprene-styrene block copolymer (SIS), and styrene-butadiene-styrene block copolymer (SBS). ), Styrene-ethylene-propylene-styrene copolymer (SEPS), and the like. These styrenic block polymers preferably have a styrene moiety molecular weight of 7000 to 2
000, the molecular weight of the rubber part is preferably 35,000
~ 70,000 block copolymer.

The tackifier includes a C5 petroleum resin having a softening point of 80 ° C. or higher and a molecular weight of 400 to 2,000, a C9 petroleum resin, a C5 / C9 petroleum resin, α
Examples thereof include a polyterpene resin, a rosin-based resin, or a hydrogenated product thereof, which is a copolymer of pinene, β-pinene, or dipentene. The softener has a softening point of 10 ° C.
A process oil having an average molecular weight of 200 to 700,
Various plasticizers, polybutene, liquid resin and the like can be mentioned.

The pressure-sensitive adhesive is preferably one having the following composition. Styrene block polymer 100 parts by weight, tackifier 150-200 parts by weight, softener 30-100 parts by weight

Thus, in the sanitary napkin packaging structure 1 of the present embodiment, the entire surface of the packaging material 20 is subjected to a peeling treatment, and the seal portions 2 and 2 ′ are formed as shown in FIG. The packaging material 20 is formed by partially fusing in a dot shape by a heat fusing device. The heating and fusing device can be used without particular limitation as long as it has a plurality of dot-shaped heating portions. For example, a device in which a conventionally known heating and fusing device is provided with a dot-shaped heating portion, and the like. Can be used. In the present invention, the rate at which the packaging material 20 is partially fused in the seal portion 2 (the area of the fused portion / the area of the seal portion) is preferably 10% to 50%. As described above, the size of each dot 2a when the dots are partially fused is 0.1 mm to
The distance between the dots 2a is preferably 1 mm.
It is preferably between mm and 2 mm.

[0018] As the packaging material 20, Ri Contact its entire inner surface is release treated, the thickness of 5~50μm polypropylene, polyester, polyethylene, polyvinyl alcohol or nonwoven fabric or paper, and packaging materials such as these composite materials, A release sheet obtained by subjecting the entire inner surface to a release treatment is preferred. In the present invention, the above-described release treatment can be performed by applying a release treatment agent on the entire inner surface or attaching a release tape. The release agent or the release material component of the release tape is preferably a silicone resin type, a fluorine resin type, or an octadecyl isocyanate type. In particular, as the release treatment, it is preferable to use a silicone resin-based release component and apply and heat dry or spray a spray to form a thin film. The packaging material in the present invention is formed of a polyolefin or a conventional polyester such as polyethylene and polypropylene, polyolefin film or a release-treated the Po Li ester film are joined by thermal or ultrasonic or the like on the packaging material Such a packaging material has moderate rigidity, is easy to open, and has excellent heat resistance, which is advantageous in production.

In the sanitary napkin packaging structure of the present invention, the sealing strength of the sealing portion is 10 g / 10 m.
m to 150 g / 10 mm, preferably 20 to 10 g.
0 g / 10 mm, most preferably 20-80 g /
10 mm. The seal strength is 200g / 10mm
When the value exceeds the above, it becomes extremely difficult to open the seal portion, and in some cases, the packaging material is broken, and the packaging material cannot be used at the time of disposal of the sanitary napkin. Here, the seal strength is determined according to the following measurement method. [Measurement Method] As shown in FIG. 7, the strength when the end of the seal portion was gripped and peeled off in the direction perpendicular to the seal direction (the direction of the arrow) was measured according to the following measurement conditions and quantified. . (Measurement conditions)-Tensile tester; "Tensilon RTH-100" (manufactured by Orientec Co., Ltd.)-Tension speed: 300 mm / min-Tension direction: 180 °-Seal width: 10 mm

Next, a preferred method for forming the sanitary napkin packaging structure 1 of the present embodiment will be described. As shown in FIG. 8, the sanitary napkin packaging structure 1 of the present embodiment applies an adhesive 16 ′ onto a continuous sheet 20 ′ of a packaging material whose entire inner surface has been subjected to a peeling treatment. A step of carrying the sanitary napkin 10 in phase with the ', and pressing and transferring the adhesive to the sanitary napkin 10 (step A), folding the sanitary napkin 10 at the folding point 17 and folding it in three (Step B), a step of folding the continuous sheet 20 'of the packaging material so that both side edges thereof are overlapped (step C), and a step of partially fusing the overlapped portion and the longitudinal direction of the sanitary napkin 10. Sealing parts 2 and 2 ′ are cut by cutting the packaging materials located at both ends and partially fusing them.
Can be formed by sequentially performing the step of forming (Step D).

In the embodiment shown in FIGS. 1 to 8 described above, the adhesive layer is provided on the front part and the center part, respectively, by one.
Although the example in which the adhesive layers are provided is described, the present invention is not limited to this example. For example, the number and shape of the adhesive layers are not particularly limited, and may be two or more. In addition, the form of the sanitary napkin may be a napkin. Further, as shown in FIG. 9, the above-mentioned seal portion can be formed by partially fusing using a heat fusing device having a pin-shaped heating portion 30. In this case, a perforated hole is formed. Is formed and the periphery of the hole is fused. As described above, even when the partial fusion is performed by the thermal fusion device having the pin-shaped heating section 30, the proportion of the fused portion is in the same range as the above-described embodiment shown in FIGS. You. In the “partial fusion” in the seal portion, the rate of fusion is as shown in FIGS.
If it is partially fused to be in the same range as
Partial fusion may be performed by heat sealing in a straight line. Such linear partial fusion can be performed using a generally known linear heat sealing method without any particular limitation. At this time, the width of the straight line is preferably set to 1 to 3 mm. Further, the width of the seal portions 2 and 2 ′ is 5 to 20 m.
m, particularly preferably 10 to 15 mm.

In particular, it is preferable that the packaging structure of the present invention is formed so that the packaging material 20 is not torn when the seal portions 2, 2 'are opened. Specifically, when the seal portion is opened, a portion of the packaging material other than the seal portion is formed so as not to be torn, and a portion of the packaging material forming the seal portion. Is preferably formed so as not to be substantially destroyed. Here, "substantially not broken" means that the packaging material forming the seal portion does not tear or break due to the stress at the time of opening after the fused portion. . For example, in the case of partially fusing in a dot shape, there is a possibility that a part of the packaging material may be partially removed (a state in which only the fusing part sticks to another part and moves). However, in such a case, the above-mentioned “substantial destruction” does not apply.

In other words, when opening the seal portions 2, 2 ', the packaging material 20 is easily torn,
If it is stretched, it becomes difficult to open the packaging structure 1 and there is a disadvantage that the absorbent article after use in the packaging material 20 cannot be wrapped and discarded. In particular, in addition to the case where a portion other than the seal portion is torn or the case where the packaging material itself forming the seal portion is damaged, the entire packaging material may be damaged as a result, and furthermore, this seal portion is formed. Since the packaging material is hard, there is also a problem that the packaging material is dusted. For this reason, the packaging structure of the present invention
The sealing strength of the sealing portion is too strong, so that the packaging material forming the sealing portion does not separate when opening the sealing portion, and the packaging material (parts other than the sealing portion) does not tear or break. Further, it is preferable that the packaging material forming the seal portion is formed so as not to be torn.

As described above, the packaging structure in which the packaging material (the seal portion and portions other than the seal portion) is not torn at the time of opening is preferably the tear strength of the packaging material, the bulk softness of the packaging material, and the absorption. It can be obtained by adjusting the strength of taking out the sexual article from the packaging structure within the following range. That is, in the packaging structure of the present invention, the tear strength, not less than 50 g, and even at least 100g
Good preferred, further preferably at 150g or more, 20
Most preferably, it is 0 g or more. Also, the bulk softness state, and are less 30g / 15mm, 20g / 1
5mm or less and even good preferred, is most preferably 17 g / 15 mm or less. The lower limit of the bulk softness is not particularly limited, since there is a case where the 3 g / feel like clinging to the hand when the 15mm or less and a taking packaging material itself in the hand occurs, than 3 g / 15mm High is preferred. Further, the extraction strength is 40 g / 2.
0 mm or less, preferably 10 to 30 g / 20 m
m is more preferable.

If the tear strength is less than 50 g, elongation / tear / deformation of the packaging material may occur when opening the seal portion, which is not preferable. Also, in order to be able to use the packaging material with good feel, the packaging material must have flexibility, and the softer the package structure, the smoother and quieter the opening of the package structure, and the harder the package structure, the greater the opening sound and the more difficult it is to open. . That is, if the bulk softness exceeds 30 g / 15 mm, it becomes difficult to open the package, and as a result, excessive force is applied to the packaging material, which leads to breakage of the packaging material. And when it is rolled up and discarded), which is not preferable because it may not be able to be used comfortably. Furthermore, the removal strength is that the opening operation and the operation of peeling and removing the absorbent article from the packaging material are continuous, and depending on the user, the product is grasped at the time of partial opening, and the opening operation and the product are performed. This is required in view of the fact that the removal operation is often performed simultaneously. When the removal strength exceeds 40 g / 20 mm, the removal of the absorbent article cannot be performed smoothly, and as a result,
It is not preferable because the packaging material may be damaged.

The tear strength, the bulk softness, and the take-out strength are each measured as follows.

Tear Strength [Measurement Method] The packaging material 20 is cut into a size of 60 mm × 30 mm so that the direction perpendicular to the seal portion 2 (ie, the width direction of the packaging material 20) is the longitudinal direction. A notch (cut) having a length of 30 mm is made in the center of one of the short sides in parallel with the long side, and this is used as a test piece. Next, the test piece was pulled in opposite directions at both ends in the longitudinal direction, and the stress when tearing occurred from the notch was measured, and this was defined as the tear strength.・ Tensile tester; Tensilon tensile tester ・ Tensile speed: 300 mm / min

Bulk Softness [Measurement Method] A packaging material 20 was placed in a size of 100 mm × 15 mm (in addition,
(The length is 100 mm along the longitudinal direction of the packaging material.) And 15m
The test piece is rounded into a cylindrical shape (only one roll) so that the width direction of the m width is the height direction, and the rounded staple (the width of the lap is 10 mm) is stapled in two places at the top and bottom. And fix it as a measurement sample. The buckling strength when the obtained measurement sample was compressed from the height direction of the cylinder under the following conditions was measured, and the measured value was defined as bulk softness. -Compression tester; Tensilon tensile tester (used in compression mode)-Compression speed: 10 mm / min

Product take-out strength [Measurement method] The packaging material 20 is completely opened, and the adhesive layer 16 and the inner surface of the packaging material 20 are extended while the absorbent article and the packaging material 20 remain in the adhered state. The cut portion is cut out to prepare a test piece in which the packaging material 20 and the back sheet of the absorbent article are adhered in a state as shown in FIG. Next, the obtained test piece is cut into a narrow band having a width of 20 mm so that the peeling direction is the longitudinal direction to obtain a measurement sample. Then, with respect to the obtained measurement sample, the end of the back sheet and the end of the packaging material were respectively gripped, and FIG.
Each of them was pulled in the direction shown in FIG. 1 and the stress when the two peeled off was measured.・ Tensile tester; Tensilon tensile tester ・ Tensile speed: 300 mm / min ・ Tension direction: 180 °

The seal strength of the seal portion needs to be within the above-mentioned range. However, since the lower the seal strength, the better, the seal strength of the seal portion is set as low as possible. In order to prevent unexpected opening of the case, an auxiliary sealing means may be provided in addition to the sealing portion. In particular, the seal portion 2 'at the longitudinal edge of the packaging material does not need to be particularly provided,
Instead of the sealing portion 2 ', the above-mentioned auxiliary sealing means can be provided. The adhesive force of the auxiliary sealing means is preferably 10 g / 10 mm or more, and is preferably 20 to 80 mm.
g / 10 mm is more preferable, and by setting it in this range, adhesion becomes stable and opening becomes easy.

As such auxiliary sealing means, in addition to the above-described heat sealing and bonding with an adhesive, it is easier to use the opening means instead of the sealing portion 2 '. In the most desirable form, a re-adhesive tab tape can be used. As the tab tape, generally known ones can be used without any particular limitation. That is, in the packaging structure of the present invention, the longitudinal end portion 24 of the packaging material 5 may be sealed with a re-attachable tab tape without providing the seal portion 2 ′. .

Next, another embodiment of the sanitary napkin packaging structure of the present invention will be described with reference to FIGS. Here, FIG. 10 is a perspective view showing another form of the sanitary napkin packaging structure of the present invention, and FIG.
FIG. 12 is a perspective view showing a bottom surface of the sanitary napkin in the packaging structure shown in FIG. 0, FIG. 12 is a schematic perspective view showing a form in the middle of folding the sanitary napkin into three, and FIG.
It is the schematic which shows the principal part (mainly supply process) of the manufacturing process of the packaging structure of the sanitary napkin of this invention. It should be noted that the description in the above-described embodiments shown in FIGS.

The sanitary napkin packaging structure 1 of the present embodiment shown in FIGS. 10 to 13 is composed of a sanitary napkin 10 and a rectangular packaging material 20 for individually mounting the same. The adhesive layer 16 provided on the contact surface 12 side and the inner surface of the packaging material 20 are releasably adhered to each other, and the sealing portion 2 provided by fusing a part of the packaging material 20 is provided.
Sealed by 2 '.

More specifically, the packaging structure 1 for a sanitary napkin is a non-skin contact surface 1 of a sanitary napkin 10.
The sanitary napkin 10 contacted with the packaging material 20 is brought into contact with the entire surface of the sanitary napkin 10, and the longitudinal direction of the sanitary napkin 10 is integrated with the packaging material 20 in the front part 13 and the center. Two bent parts 1 that are approximately equally divided into a part 14 and a rear part 15
7, the rear part 15 and the front part 13 are folded in three in the order of the skin contact surface 11 side of the central part 14, and both side edges 22 and end edges 23 of the packaging material 20 are fastened. To form seal portions 2 and 2 '. In addition, as shown in FIG. 11, the entire surface (front portion, center portion, and rear portion) of the non-skin contact surface 12 of the sanitary napkin 10 packaged by the packaging structure of the present invention is a band-shaped adhesive layer. The adhesive layer 16 is entirely adhered to the inner surface of the packaging material 20 and protected. When the sanitary napkin 10 is used, the knob portion 3 is pulled up in the direction of the arrow shown in FIG. 10, the seal portions 2 and 2 'are peeled off, and the sanitary napkin can be taken out and used.

Next, a preferred manufacturing method of the sanitary napkin packaging structure of the above embodiment will be described. The sanitary napkin packaging structure of the present embodiment has an adhesive layer 16 formed thereon as shown in FIGS. The non-skin contact surface 12 of the untreated sanitary napkin precursor 10 ′ is attached to the non-skin contact surface 12 of the continuous sheet 20 ′ of the packaging material 20, the entire surface 21 ′ of which is entirely peeled.
1 ′ is brought into contact, and a supply step of cutting the continuous sheet 20 ′ at a predetermined position, and after the sanitary napkin precursor 10 ′ is folded integrally with the packaging material 20 at the bent portion 17, And a packaging step of fixing a predetermined portion of the packaging material 20. The supplying step includes the step of supplying the sanitary napkin precursor 1
Immediately before the continuous sheet 20 ′ is brought into contact with the non-skin contact surface 12 ′ at 0 ′, an adhesive 16 for forming the adhesive layer 16 of the sanitary napkin 10 by transfer at a predetermined position on the one surface 21 ′.
It can be easily obtained according to a production method having a pressure-sensitive adhesive application step of applying a.

More specifically, in the supply step, as shown in FIG. 13, first, a continuous sheet 10 ″ of the sanitary napkin precursor 10 ′ is compressed by a roller 50, and then cut into a desired shape. A sanitary napkin precursor (the sanitary napkin 10 in which the adhesive layer 16 is not formed) 10 'is obtained.The desired shape is appropriately determined according to the use of the sanitary napkin (eg, thin, night use, etc.). Next, the continuous sheet 20 ′ is pulled out from the roll, and brought into contact with the non-skin contact surface 12 of the sanitary napkin precursor 10 ′ supplied in the longitudinal direction via the roller 51, The continuous sheet 20 'is cut at a predetermined position.
Here, the predetermined position at which the continuous sheet 20 'is cut is such that the obtained packaging material 20 is placed on the sanitary napkin precursor 1.
In particular, if the position is a position that covers the entire surface of the non-skin contact surface 12 of 0 ′ (the position where the both longitudinal edges of the packaging material 20 are outside the longitudinal both ends of the sanitary napkin 10). Not restricted.

In the packaging step, as shown in FIG. 12, the sanitary napkin precursor 10 ′ is placed on the central portion 14 in the rear portion 15 and the front portion 13 in the two bent portions 17 in this order. After being folded together with the packaging material 20,
The side edges 22 and the edge 23 of the packaging material 20 are heat-sealed and fastened.

The supply step includes an adhesive application step. In the adhesive application step, the continuous sheet 2
The pressure-sensitive adhesive 16 ′ is applied to a predetermined position of the one surface 21 ′ on which the 0 ′ peeling treatment has been performed by the pressure-sensitive adhesive application means 40. Here, the “predetermined position” is particularly limited as long as the adhesive layer 16 is formed at a desired position and shape of the sanitary napkin when the adhesive 16a is transferred to the sanitary napkin precursor 10 ′. It is not intended to be used, but it is optional depending on the use of the sanitary napkin, the size of the packaging material, the shape of the adhesive layer, and the like.In this embodiment, the rectangular adhesive is applied continuously at regular intervals. ing.

As the adhesive applying means 40 used at this time, for example, a contact type or non-contact type coating system or the like is used. The application of the adhesive 16a is immediately before the continuous sheet 20 'and the sanitary napkin precursor 10' are brought into contact with each other. ~ 2 seconds, preferably
The application temperature of the adhesive at this time depends on the kind of the adhesive to be used, but is preferably from 80 to 150 ° C.

It should be noted that the packaging structure of the absorbent article of the present invention is not limited to the above-described embodiment, and can be variously modified without departing from the spirit of the present invention. Also, the method of manufacturing the sanitary napkin packaging structure is not limited to the manufacturing method illustrated in FIG. 8 and the manufacturing methods illustrated in FIGS. 12 and 13. By applying the adhesive directly to the non-skin contact surface of the sanitary napkin without applying the adhesive to the inner surface of the sanitary napkin, and forming the adhesive layer, the packaging structure of the sanitary napkin is manufactured. You can also.

[0041]

EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples and comparative examples, but the present invention is not limited to these examples.

Example 1 A packaging material obtained by subjecting a polyethylene film (thickness: 30 μm) to a full release treatment with a silicone-based release agent (specifically, a polymer having dimethylpolysiloxane as a basic skeleton) was used as the packaging material. The packaging structure of the sanitary napkin shown in FIG. 1 was manufactured. In this case,
Each of the seal portions 2 and 2 ′ has a size of 0.6 mm.
And sealing (partial fusing) at a temperature of 140 ° C. At this time, the area ratio of the area of the fused portion to the entire seal portion was 30%. The coating thickness of the adhesive in the adhesive layer 16 was 35 μm. With respect to the used packaging material and the like, the seal strength, tear strength, bulk softness, and take-out strength were measured according to the above-described measurement methods. The results are shown in [Table 1]. In addition, various tests were performed on the packaging structure of the obtained sanitary napkin as described below. The results are shown in [Table 1].

[Test and Evaluation Method] The obtained packaging structure was used by a monitor woman, and the following points were evaluated. Ease of opening 1. Easy to open 2. Somewhat easy to open 3. Neutral 4. Somewhat difficult to open 5. It is difficult to open the napkin. Easy to remove 2. Slightly easy to remove 3. Neutral
4. 4. Slightly difficult to remove It is difficult to remove the packaging material. I did not break at all. 2. Although some tears (elongation) occurred, there was no problem in use. 3. Torn / grow / large, cannot be reused for disposal. Complete tearing / shredding occurred, and the packaging material remained on the product body side. Overall evaluation 1. I like 2 Somewhat like 3. Neutral 4. Slightly dislike
5. I disliked In the evaluation, I chose the number closest to my feelings according to the above items. In addition, the evaluation was carried out by passing two obtained packaging structures to 50 women and performing the operations from opening to discarding each,
I had you evaluate. The average value was determined for each evaluation. The meaning of the numbers in the table is determined according to each item, but basically, the smaller the average value, the better the evaluation.

Example 2 A sanitary napkin packaging structure was manufactured in the same manner as in Example 1 except that the sealing temperature was changed to 110 ° C. Further, the sealing strength, tear strength, bulk softness, and take-out strength of the used packaging material and the like were measured in the same manner as in Example 1. The results are shown in [Table 1].
Various tests were carried out on the package structure of the obtained sanitary napkin in the same manner as in Example 1. The results are shown in [Table 1].

[Example 3] A sanitary napkin packaging structure was manufactured in the same manner as in Example 1 except that the sealing temperature was 90 ° C. In addition, the packaging materials and the like used in Example 1 were used.
The seal strength, tear strength, bulk softness, and take-out strength were measured in the same manner as in Example 1. The results are shown in [Table 1]. Various tests were carried out on the package structure of the obtained sanitary napkin in the same manner as in Example 1. The results are shown in [Table 1].

[Embodiment 4] The sealing temperature was set to 80 ° C., and the edge 24 of the packaging material 5 was removed without providing the sealing portion 2 ′.
A sanitary napkin packaging structure was manufactured in the same manner as in Example 1 except that a 15-mm (W) × 35-mm (L) -attached tab tape having a tab portion and being re-adherable was attached and sealed. The adhesive strength of the tab tape was 30 g / 10 mm. Further, the sealing strength, tear strength, bulk softness, and take-out strength of the used packaging material and the like were measured in the same manner as in Example 1. The results are shown in [Table 1]. Various tests were carried out on the package structure of the obtained sanitary napkin in the same manner as in Example 1. The results are shown in [Table 1].

Example 5 A sanitary napkin packaging structure was manufactured in the same manner as in Example 1, except that sealing was performed at a temperature of 110 ° C. in a linear pattern having a width of 1.5 mm. On this occasion,
The area ratio of the area of the fused portion to the entire seal portion was 40%. Further, the sealing strength, tear strength, bulk softness, and take-out strength of the used packaging material and the like were measured in the same manner as in Example 1. [Table 1]
Shown in Various tests were carried out on the package structure of the obtained sanitary napkin in the same manner as in Example 1. The results are shown in [Table 1].

Example 6 Pulp 1 having a basis weight of 18 g / m ²
A laminated film obtained by laminating a polyethylene film having a thickness of 12 μm on 00% paper is subjected to a full-surface release treatment on the film side with the same silicone-based release agent as used in Example 1 to obtain a packaging material. Was. Using the obtained packaging material, a sanitary napkin packaging structure was manufactured in the same manner as in Example 5, except that the sealing temperature was 110 ° C. Also,
For the used packaging material and the like, the seal strength, tear strength, bulk softness, and take-out strength were measured in the same manner as in Example 1. The results are shown in [Table 1]. Various tests were carried out on the package structure of the obtained sanitary napkin in the same manner as in Example 1. The results are shown in [Table 1].

Example 7 A packaging material obtained by subjecting a 25 μm-thick polyethylene terephthalate resin film to a full-surface release treatment with the same silicone release agent as used in Example 1 was used, and the sealing temperature was set to 180 ° C. A sanitary napkin packaging structure was manufactured in the same manner as in Example 5 except that the above procedure was followed.
Further, the sealing strength, tear strength, bulk softness, and take-out strength of the used packaging material and the like were measured in the same manner as in Example 1. The results are shown in [Table 1]. Various tests were carried out on the package structure of the obtained sanitary napkin in the same manner as in Example 1. The results are shown in [Table 1].

Example 8 Using a packaging material obtained by subjecting a polyethylene resin film (thickness: 15 μm) to a full-surface release treatment with the same silicone release agent as used in Example 1,
Further, a sanitary napkin packaging structure was manufactured in the same manner as in Example 5 except that the sealing temperature was 140 ° C. Further, the sealing strength, tear strength, bulk softness, and take-out strength of the used packaging material and the like were measured in the same manner as in Example 1. The results are shown in [Table 1]. Various tests were carried out on the package structure of the obtained sanitary napkin in the same manner as in Example 1. The results are shown in [Table 1].

Comparative Example 1 Example 6 was the same as Example 6 except that the sealing portion was a linear pattern and the sealing temperature was 150 ° C.
In the same manner as in the above, a packaging structure for the sanitary napkin was manufactured.
Further, the sealing strength, tear strength, bulk softness, and take-out strength of the used packaging material and the like were measured in the same manner as in Example 1. The results are shown in [Table 1]. Various tests were carried out on the package structure of the obtained sanitary napkin in the same manner as in Example 1. The results are shown in [Table 1].

Comparative Example 2 Pulp 1 having a basis weight of 18 g / m ²
A packaging material in which a dot-shaped emboss is applied to the entire surface of a laminated film formed by laminating a polyethylene resin film having a thickness of 8 μm on a paper of 00% without being subjected to a peeling treatment, and sealed at a sealing temperature of 120 ° C. Manufactured a sanitary napkin packaging structure in the same manner as in Example 1. In addition, for the used packaging material and the like, the sealing strength and the
The tear strength, bulk softness and removal strength were measured.
The results are shown in [Table 1]. Various tests were carried out on the package structure of the obtained sanitary napkin in the same manner as in Example 1. The results are shown in [Table 1].

[0053]

[Table 1]

As is clear from the results shown in Table 1,
The packaging structure of the present invention was able to be opened smoothly without causing breakage / elongation of the packaging material, and was easy to use. In particular, in the packaging structure using the tab tape in combination as in Example 4, even better results were obtained without opening the mouth and facilitating opening. On the other hand, in a packaging structure having a high seal strength as in Comparative Examples 1 and 2,
The opening itself was hindered, and the packaging material was severely torn, resulting in many inconveniences. Specifically, in the packaging structure of Comparative Example 1, a part of the packaging material remains (adheres) on the sanitary napkin side, thereby impairing ease of removal. In addition, the packaging structure of Comparative Example 2 was particularly unusable, in addition to the increased output.

[0055]

According to the present invention, there is provided a packaging structure for an absorbent article which has a simple manufacturing process, is well sealed, and is easy to open. In particular, in the sanitary napkin packaging structure, since the entire surface of the packaging material is subjected to a peeling treatment,
It is not necessary to perform phase matching on the packaging material, and the manufacturing process can be simplified.Also, since the seal portion is formed by partial fusion, without impairing the peelability of the seal portion,
A predetermined sealing is possible.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a sanitary napkin packaging structure of the present invention.

FIG. 2 is a perspective view showing a bottom surface of the sanitary napkin in the packaging structure shown in FIG.

FIG. 3 is a perspective view of a packaging material in the packaging structure shown in FIG. 1;

FIG. 4 is a schematic perspective view showing an intermediate configuration when the sanitary napkin is folded into three parts.

FIG. 5 is a schematic perspective view showing a packaging mode of a sanitary napkin folded in three by a packaging material.

FIG. 6 is an enlarged plan view showing a seal portion of the packaging structure shown in FIG.

FIG. 7 is a schematic view showing an outline of a method for measuring a seal strength.

FIG. 8 is a schematic view showing a main part of a manufacturing process of a packaging structure for a sanitary napkin of the present invention.

FIG. 9 is a partial cross-sectional view showing another example of the formation of the seal portion in the sanitary napkin packaging structure of the present invention.

FIG. 10 is a perspective view showing another embodiment of the sanitary napkin packaging structure of the present invention.

FIG. 11 is a perspective view showing a bottom surface of the sanitary napkin in the packaging structure shown in FIG. 10;

FIG. 12 is a schematic perspective view showing a form in the middle of folding the sanitary napkin into three parts.

FIG. 13 is a schematic view showing a main part (mainly a supply step) of a manufacturing process of the sanitary napkin packaging structure of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Packaging structure of sanitary napkin 2, 2 'seal part 3 Knob part 10 Sanitary napkin 11 Skin contact surface 12 Non-skin contact surface 13 Front part 14 Center part 15 Rear part 16 Adhesive layer 17 Folding part 20 Packaging material heating unit having a 22-side edge 23 edge 30 pin-shaped

 ──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Masahito Tanaka 2606 Akabane, Kaiga-cho, Haga-gun, Tochigi Prefecture Kao Research Institute (56) References JP-A-3-176376 (JP, A) JP-A-6-262709 ( JP, A) JP-A-57-96908 (JP, A) JP-A-3-43361 (JP, A) Full-open sho 55-151322 (JP, U) Full-open sho 55-146127 (JP, U) Full-open Hei 5-75160 (JP, U) Real opening 58-179120 (JP, U) Real opening 63-163822 (JP, U) Real opening 1987-78605 (JP, U)

Claims (1)

(57) [Claims] 1. An absorbent article and a rectangular packaging material for individually mounting the absorbent article, wherein an adhesive layer provided on a non-skin contact surface side of the absorbent article and an inner surface of the packaging material are peelable. The packaging material is folded in the longitudinal direction.
And the folded side edges in the longitudinal direction are fused.
To form a seal portion, and
One edge in the longitudinal direction and the other edge are one end
In the absorbent article packaging structure in which the edge portion is positioned and sealed on the side of the absorbent article, the packaging material is formed of a polyolefin film or a polyester film, and the entire inner surface is subjected to a release treatment; and The packaging material has a tear strength of 50 g or more and a bulk softness of 30 g / 15 mm or less, and the sealing portion is formed by partially fusing the packaging material with a heat fusing device. seal strength parts are Ri 10g / 10mm~150g / 10mm der, and one of said end edge portion and the other of the edges, the seal
Tab tape that can be re-adhesive by the same partial fusion as
Packaging structure of the absorbent article which is characterized that you have been sealed more sealing.