JPH1085255A - Disposable diapers - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To surely prevent volatilization of volatile substances before excretion and to volatilize volatile substances reliably after excretion. A disposable diaper having a liquid-absorbent core interposed between a liquid-permeable top sheet and a liquid-impermeable back sheet.
In this case, a volatile substance enclosing body 18 in which a volatile substance is sealed in a water-soluble coating material is accommodated in the absorbent core 4, etc., and the volatile substance is leaked by dissolving the water-soluble coating material by the moisture of urine discharged. ing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a disposable diaper. More specifically, the present invention relates to a disposable diaper that gives off an aroma when excreted, or deodorizes or deodorizes.

[0002]

2. Description of the Related Art Heretofore, as one of disposable diapers, there has been a disposable diaper using a body fluid absorber in which a volatile fragrance is mixed. In this type of diaper, it is possible to prevent odor by causing fragrance during use.

As another type of disposable diaper, a fragrance imparting agent in which a fragrance is encapsulated in a dry powder of a water-insoluble polymer having a high water swelling property and a high water content is used as an absorbent core of a diaper. In some cases, the water-insoluble polymer is swelled by absorbing water from urine or the like to volatilize the fragrance from between the loose cross-links (JP-A-61-68042).
issue). In this type of disposable diaper, the fragrance is released by excretion, so that the mother or the like can notice the excretion of the baby by using the fragrance as a clue.

[0004]

However, in a disposable diaper of the type in which a volatile fragrance is mixed in an absorber, the fragrance is volatilized before use, and the fragrance is weakened with the passage of time. Excretion may not be very useful. In addition, even if the fragrance is maintained and the excretion odor can be hidden, the intensity of the fragrance does not change by excretion, so it is not possible to know the excretion by using the fragrance as a clue, that is, it does not function as an indicator, It was difficult to change diapers at the right time.

In a disposable diaper using an aroma imparting agent disclosed in Japanese Patent Application Laid-Open No. 61-68042, it is possible to notice the excretion of a baby by using the aroma as a clue. The fragrance is first exposed by swelling to some extent and breaking the polymer layer,
As a result, the fragrance starts to drift, so it takes time from excretion to the start of the fragrance. For this reason, it was late to notice excretion, and it was difficult to change diapers at an appropriate timing.

An object of the present invention is to provide a disposable diaper capable of reliably preventing volatile substances from volatilizing before excretion and reliably volatilizing volatile substances immediately after excretion.

[0007]

In order to achieve the above object, the present invention provides a disposable diaper having a liquid-absorbent core interposed between a liquid-permeable topsheet and a liquid-impermeable backsheet. Contains a volatile substance enclosure in which a volatile substance is sealed in a water-soluble coating material in the core, between the liquid-absorbent core and the liquid-impermeable backsheet, or between the liquid-absorbent core and the liquid-permeable topsheet. Then, the water-soluble coating material is dissolved by the moisture of the excrement to leak volatile substances.

[0008] Therefore, when the disposable diaper is mounted, the volatile matter in the volatile matter enclosure is held in a state of being sealed in the water-soluble coating material, and does not leak and volatilize. Then, when the diaper user excretes, the moisture of the excrement passes through the liquid-permeable topsheet and is absorbed in the absorbent core, and comes into contact with the volatile substance enclosure in the absorbent core, Alternatively, the water-soluble coating material is wrapped around between the liquid-absorbent core and the liquid-impermeable backing sheet to come into contact with the volatile matter enclosure, immediately dissolving the water-soluble coating material and leaking out the encapsulated volatile matter. Leaked volatiles begin to volatilize; for example, if the volatiles are fragrances, the fragrance is immediately released, and if, for example, the volatiles are deodorants, excreted odors are immediately released. Deodorization is achieved.

[0009] Here, the volatile substance enclosing body is not particularly limited to the accommodation position, but is to be installed in the liquid absorbing core or between the liquid absorbing core and the liquid impermeable back sheet. Is preferred. In this case, it is possible to prevent the volatile substance from directly adhering to the user, and to evaporate the volatile substance after the body fluid is sufficiently absorbed by the absorbent core. Further, the volatile matter inclusion body does not need to be sealed in the entire diaper or the liquid-absorbent core, and it is sufficient that the volatile matter inclusion body is housed at least in the area where the excrement adheres. In this case, it functions effectively as an indicator to notify urination or the like with a minimum amount of volatile substances or as an odor eliminating.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below in detail based on an embodiment shown in the drawings.

FIG. 1 shows an embodiment in which the disposable diaper of the present invention is applied to a pants-type diaper. The pants-type diaper 1 includes a liquid-permeable top sheet 2 and a liquid-impermeable back sheet 3 that directly or indirectly touch the body via a liquid-permeable sheet or the like, and are interposed between the two sheets 2 and 3 and excreted. A core material (referred to as a liquid-absorbent core) 4 for absorbing the bodily fluids, and is joined in a liquid-tight manner at the periphery of each of the sheets 2 and 3 to seal the liquid-absorbent core 4 therebetween. The pants-type diaper 1 has a front waist region (front body) 6, a rear waist region (full body) 7, and a crotch region 8 located between the two waist regions 6 and 7. The side edges of the two body regions 6 and 7 overlap each other with the liquid-permeable top sheet 2 inside, and are integrally joined at a joining portion 10 intermittently arranged in the up-down direction to form a waist opening. 12 and a pair of left and right leg openings 1
3 are formed. At the periphery of each of the openings 12, 13, there is a waist elastic member 15 or a leg elastic member 16, and these elastic members 15, 16 are extended between the sheets 2, 3 so that at least one of the sheets 2, 3 is extended. It is stuck on the inside.

A non-woven fabric or a perforated plastic film is used for the liquid-permeable top sheet 2, and a plastic film is used for the liquid-impermeable back sheet 3. The liquid-absorbent core 4 is composed of a core portion 4A formed of a mixture of ground pulp and superabsorbent polymer particles into a substantially hourglass shape, and a tissue paper covering portion 4B superposed on the core portion 4A. . The liquid-absorbent core 4 accommodates a volatile substance enclosing body 18 for notifying the excretion of urine or other excrement accompanied by water. In this case, after the bodily fluid such as urine is sufficiently absorbed by the absorbent core 4, the water-soluble coating material 19
Melts and volatiles 20 therein evaporate. The volatile substance enclosing body 18 is accommodated at least in a region where the excrement adheres, for example, a portion corresponding to a straddle as illustrated. Further, the size and the like of the volatile matter enclosure 18 are not particularly limited, but at least an area and a capacity capable of functioning as an indicator and a deodorant / deodorant material for notifying that urination has been performed, etc. It is not necessary to have a size that occupies the entire area of the absorbent core 4 or the diaper 1.

The volatile substance enclosure 18 is made of a water-soluble coating material 19.
To contain the volatile matter 20. Water-soluble coating material 19
Is, for example, a water-soluble film formed into a bag. The condition is that the water-soluble film is stable to fragrance (oil) (excellent in oil resistance and solvent resistance) and has no permeability. Furthermore, it is desirable that heat sealing can be performed. Examples of the material of the water-soluble film satisfying these conditions include PVA (polyvinyl alcohol), gelatin, paogen, CMC (carboxymethylcellulose), and alginic acid. However, in view of the fact that it can be immediately dissolved in water and the like, it is desirable to use a PVA film having natural degradability. When a PVA film is used as the water-soluble film, the film thickness is 20 to 60 μm in consideration of the dissolution rate, physical external pressure durability, and workability.
Is desirable. If the thickness is smaller than 20 μm, the durability against physical external pressure is relatively high, and processing becomes difficult. On the other hand, if the film thickness is greater than 60 μm, it takes a long time to dissolve and leak the fragrance contained therein. However, PV with a film thickness outside this range
It is possible to use even an A film.

In this embodiment, the water-soluble coating material fixing portion 21 shown by a two-dot chain line in FIG.
The water-soluble coating material 19 is formed into a bag shape by heat-sealing the vicinity of the periphery. The water-soluble coating material 19
Does not necessarily need to be formed in a bag shape, and the shape is not particularly limited as long as the volatile matter 20 can be securely contained.

The volatile substance 20 is, for example, a volatile liquid or powder (powder). As the volatile liquid, for example, a fragrance is mentioned, and the fragrance is not particularly limited to a fragrance component or the like, but if the fragrance is already impregnated with moisture before the fragrance is encapsulated, the diaper according to the present embodiment may be used. Since the water-soluble coating material 19 may be dissolved before being used, it is desirable not to mix materials that easily absorb moisture such as alcohols, glycols, and surfactants in order to prevent this. In order to prevent water absorption, it is desirable to mix 1 to 20 parts by volume of a hydrophobic solvent, for example, isoparaffin or hydrocarbons, with respect to 1 part by volume of the fragrance. Examples of the volatile powder include those in which the above fragrance is supported on cellulose powder or the like.

According to the diaper configured as described above,
Notify urination as follows:

Now, consider a case in which a pants-type diaper 1 using a fragrance as the volatile matter 20 is worn on a baby.
In the state where the product packaging of the pants-type diaper 1 is unpacked and attached to the baby, the fragrance 20 is sealed in the water-soluble covering material 19, so that the fragrance does not volatilize and drift fragrance.

When the baby urinates, for example,
After the urine passes through the liquid-permeable topsheet 2 and is sufficiently absorbed by the liquid-absorbent core 4, the urine comes into contact with the volatile matter inclusion 18 and immediately dissolves the water-soluble coating material 19. Therefore, the fragrance 20 leaks and volatilizes, and the fragrance starts to drift. The mother by the side of the baby notices the baby's urination by this scent. That is, the mother notices immediately after urination and can change diapers at an appropriate timing.

The above embodiment is one preferred embodiment of the present invention, but the present invention is not limited to this embodiment, and various modifications can be made without departing from the gist of the present invention. For example, the volatile matter enclosure 18 is accommodated not only in the absorbent core 4 but also between the absorbent core 4 and the liquid-impermeable back sheet 3 outside the absorbent core 4. May be
Further, it may be disposed between the liquid-absorbent core 4 and the liquid-permeable topsheet 2 and is not particularly limited to a position where the liquid-absorbent core 4 can be in contact with a bodily fluid such as urine. However,
The volatile substance 20 is prevented from adhering to the skin of the diaper user and the body fluid is sufficiently absorbed by the absorbent core 4 to evaporate the volatile substance 20 to notify urination and to provide an odor prevention effect. It is practical to arrange the volatile substance enclosing body 18 in the liquid-absorbent core 4 or between the liquid-absorbent core 4 and the liquid-impermeable back sheet 3 in designing to exhibit the effect. Further, in the present embodiment, the case where a fragrance is used as the volatile substance 20 has been described. However, the present invention is not limited to the fragrance. For example, a liquid or powder containing a deodorant, a deodorant, a bactericide, or the like may be used. Of course. In particular, for a disposable diaper for adults, it is preferable to use a deodorant, a deodorant, or the like as the volatile substance 20, and it is possible to prevent the generation of an unusual odor.

In the above-described embodiment, the case where the present invention is applied to a pants-type diaper is described. However, it is needless to say that the present invention is not limited to the pants-type diaper. Although the embodiment applied to the diaper has been mainly described, a volatile substance enclosure may be accommodated in or around an absorbent core such as another body fluid absorbing napkin, for example, a sanitary napkin.

[0021]

The present invention will be described in more detail with reference to examples and comparative examples, but it is needless to say that the present invention is not limited to these examples. (Example 1) As shown in Table 1, a volatile substance enclosure 18 was used as the volatile substance enclosure 18, and the volatile substance enclosure 18 was placed between the absorbent core 4 and the liquid impermeable sheet 3 as shown in FIG. The pants-type diaper 1 was housed in the center of the crotch portion of the absorber to produce a pants-type diaper 1. The volatile matter enclosure 18 was fixed around the water-soluble coating material 19 by heat sealing, formed into a bag shape, and sealed with the fragrance A.

[0022]

[Table 1] Table 2 shows the composition of the fragrance A.

[0023]

[Table 2] (Comparative Example 1) The perfume A was applied to the tissue paper (covering portion) 4B of the absorbent core 4 by 0.1 g to prepare a pants-type diaper. (Comparative Example 2) Cyclic dextrin 1 g in absorbent core 4
The powder containing 0.1 g of the perfume A uniformly contained therein was contained to prepare a pants-type diaper. Comparative Example 3 5 g of cyclic dextrin in absorbent core 4
The powder containing 2 g of the perfume A uniformly contained therein was housed to prepare a pants-type diaper. (Comparative Example 4) As shown in Table 3, the volatile substance enclosure 18 was used, and the volatile substance enclosure 18 was placed between the absorbent core 4 and the liquid-impermeable sheet 3 at the center of the crotch of the absorber. It was housed to make a pants-type diaper. Note that, unlike the diaper of Example 1, a water-insoluble coating material is used instead of the water-soluble coating material 19. The periphery of the water-insoluble coating material was fixed by heat sealing to form a bag, and the fragrance A was sealed. Also,
The volatile substance inclusion body immediately after the perfume A was enclosed was used.

[0024]

[Table 3] The pants-type diapers of Example 1 and Comparative Examples 1 to 4 configured as described above were used by 20 to 3 year old infants who were conducting diaper training, and the mother evaluated each item. received. Table 4 shows the evaluation results.

[0025]

[Table 4] As is clear from the evaluation results in Table 4, the diaper which can sense the fragrance only after urination has occurred, and which can be sensed by all the scents, and which does not give discomfort of the scent, is the present invention. Only the example 1 was concerned.

[0026]

As is apparent from the above description, the disposable diaper of the present invention can be used in an absorbent core or between an absorbent core and a liquid-impermeable backsheet or between a liquid-absorbent core and a liquid-permeable topsheet. A volatile substance enclosure in which a volatile substance is sealed in a water-soluble coating material is contained between the two, and the water-soluble coating material is dissolved by the moisture of the excrement so that the volatile substance leaks out. Volatile substances can be immediately volatilized, and volatilization of volatile substances before excretion can be reliably prevented. For this reason, if a volatile substance encapsulation containing a fragrance is used as a child's diaper, the fragrance is released by urination, so that the mother etc. can immediately notice urination and change the diaper at an appropriate timing. it can.
Further, when a volatile substance encapsulating a deodorant is used as an adult diaper, the deodorant leaks out due to urination, and deodorization of urination is immediately achieved.

[Brief description of the drawings]

FIG. 1 is a partially broken perspective view showing one embodiment of a disposable diaper to which the present invention is applied.

FIG. 2 is a plan view showing an example of a volatile matter enclosure.

FIG. 3 is a conceptual center sectional view of the volatile matter enclosure of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pants type diaper 2 Liquid-permeable topsheet 3 Liquid-impermeable backsheet 4 Liquid-absorbent core 18 Volatile substance inclusion body 19 Water-soluble coating material 20 Fragrance (volatile substance)

Continuing on the front page (72) Inventor Hayato Hosokawa 4-1-11 Nihonbashi Honmachi, Chuo-ku, Tokyo Inside Kogawa Perfume Co., Ltd.

Claims (1)

[Claims] 1. A disposable diaper having a liquid-absorbent core interposed between a liquid-permeable topsheet and a liquid-impermeable backsheet, wherein the disposable diaper has a liquid-absorbent core or a liquid-impermeable core. Between the back sheet or between the liquid-absorbent core and the liquid-permeable top sheet, a volatile substance enclosing body in which a volatile substance is sealed in a water-soluble coating material is contained, and the water content of the excrement causes A disposable diaper characterized by dissolving a volatile coating material to leak the volatile substance.