WO2013176210A1

WO2013176210A1 - Non-woven fabric sheet for hygiene products and hygiene product

Info

Publication number: WO2013176210A1
Application number: PCT/JP2013/064318
Authority: WO
Inventors: 邦雄河田; 昭洋山口; 尚子嵜山
Original assignee: 小津産業株式会社
Priority date: 2012-05-23
Filing date: 2013-05-23
Publication date: 2013-11-28
Also published as: JPWO2013176210A1

Abstract

A non-woven fabric sheet (10) for hygiene products, said non-woven fabric sheet comprising a hygroscopically exothermic material, and a hygiene product using the non-woven fabric sheet, wherein: said hygroscopically exothermic material is configured from a non-woven fabric material obtained by stitch bonding a mixed yarn of a cuprammonium rayon fiber with an acrylic fiber; and, in an exothermic curve of said hygroscopically exothermic material, said exothermic curve having been obtained by allowing the hygroscopically exothermic material to absorb moisture while changing the environmental conditions from 20%RH at 20^oC to 90%RH at 20^oC, an exothermic peak appears within 60 seconds, and the exothermic temperature difference, that is defined as a difference between the initial temperature and the maximum exothermic temperature, is 3^oC or greater.

Description

Non-woven sheets for sanitary products and sanitary products

The present invention relates to a nonwoven fabric sheet for sanitary goods and a sanitary article.
In particular, the present invention relates to a non-woven fabric sheet for sanitary goods that includes a predetermined non-woven material and is excellent in rapid heat properties, and a sanitary article that uses such a non-woven fabric sheet for sanitary goods.

Conventionally, various types of panty liners, sanitary napkins, incontinence pads and the like made of a nonwoven fabric sheet for hygiene products are known.
More specifically, as shown in the plan view of FIG. 9 (a) and the partial cross-sectional view of FIG. 9 (b), a liquid holding sheet 601 formed of one nonwoven fabric, a back sheet 612, This is a panty liner 600 basically configured.
The nonwoven fabric forming the liquid holding sheet 601 is composed of a two-layer spunlace nonwoven fabric having an upper layer 615 and a lower layer 616, and the hydrophilicity of the lower layer 616 is higher than the hydrophilicity of the upper layer 615. Thus, the predetermined body fluid 625 can be quickly absorbed into the liquid holding sheet 601 through the opening 603 or the like (see, for example, Patent Document 1).

Further, as shown in the plan view of FIG. 10A and the usage pattern for the human body (K) of FIG. 10B, the liquid-retaining top sheet 706, the liquid-impermeable back sheet 703, and both This is a substantially vertically long absorbent article 700 (a sanitary napkin) including an absorbent body 704 (741, 742) interposed between sheets.
The absorbent body 704 has grooves 705 formed on at least both sides in the width direction of the upper layer absorbent body 741 and a portion corresponding to the small lower layer absorbent body 742 stacked on the back surface side of the upper layer absorbent body 741. The upper layer absorber 741 has a configuration in which a portion located on the lower layer absorber 742 protrudes upward (see, for example, Patent Document 2).

On the other hand, although not shown, as a three-dimensional structure knitted fabric excellent in moisture retention, a three-dimensional knitted fabric composed of two layers of front and back knitted fabric and a connecting yarn that connects the two layers of knitted fabric, A three-dimensional knitted fabric characterized by using a moisture-absorbing exothermic fiber having a moisture absorption amount of 15 J / g or more when changed from 20 ° C. and 40% RH to 20 ° C. and 90% RH has been proposed ( For example, see Patent Document 3).
More specifically, an acrylic monofilament and a cupra monofilament were blended at a weight ratio of 60%: 40% to obtain a blended yarn having a metric count of 1/34 Nm. This is used as a connecting yarn of a three-dimensional structure knitted fabric (weight per unit area 820 g / m ² ) made of acrylic fiber spun yarn.

JP 2005-185563 A (Claims etc.) JP 2002-238948 A (claims, etc.) JP 2004-27406 A (claims, etc.)

However, neither the panty liner of Patent Document 1 nor the absorbent article (Sanitary Napkin) of Patent Document 2 uses a hygroscopic exothermic material and absorbs or absorbs bodily fluids (blood, urine, etc.). Even in such cases, there was a problem that no heat was generated.
Therefore, a water-absorbing material that absorbs bodily fluids (blood, urine, etc.) directly contacts the surface of the human body, causing a problem that it is extremely uncomfortable to use.

Further, when the woven fabric composed of the connecting yarns of Patent Document 3 is moisture-absorbed under a predetermined condition, the position of the exothermic peak is considerably late at 100 seconds or more after moisture absorption and is defined by the difference between the initial temperature and the maximum exothermic temperature. The exothermic temperature difference was about 1 ° C., and there was a problem that the exothermic characteristics were insufficient.
Therefore, in the case of a three-dimensional knitted fabric composed of acrylic monofilaments and cupra monofilaments, there was no intention to use them for sanitary goods although there was some heat generation when the body fluid was absorbed with water.

Therefore, the inventors of the present invention have made diligent efforts, and even when equivalent moisture-absorbing and exothermic materials are formed in the form of a predetermined non-woven sheet, when body fluid is absorbed, rapid and sufficient heat generation is achieved. The present invention has been found out to show characteristics and developed into sanitary goods, thereby completing the present invention.
That is, the present invention provides a non-woven fabric sheet for sanitary products that quickly generates heat and maintains a predetermined temperature for a long time when a body fluid is absorbed, and a sanitary product using such a non-woven fabric sheet for sanitary products. The purpose is to provide.

According to the present invention, it is a nonwoven fabric sheet for hygiene products made of a hygroscopic exothermic material, and the hygroscopic exothermic material is composed of a non-woven material formed by stitch-bonding a blend of copper ammonia rayon fiber and acrylic fiber, In the exothermic curve obtained when the hygroscopic exothermic material absorbs moisture by changing the environmental conditions from 20 ° C. and 20% RH to 20 ° C. and 90% RH, there is an exothermic peak within 60 seconds, and the initial temperature and A non-woven fabric sheet for sanitary products, characterized in that the difference in heat generation temperature defined by the difference from the maximum heat generation temperature is 3 ° C. or more, is provided, and the above-described problems can be solved.
That is, by forming a nonwoven fabric sheet for hygiene products from such a hygroscopic exothermic material, when body fluid (blood, urine, etc.) is absorbed, heat is quickly generated and a predetermined temperature is maintained for a long time. Therefore, uncomfortableness when using a sanitary product composed of a non-woven fabric sheet for sanitary products can be eliminated.

Further, in constituting the nonwoven fabric sheet for sanitary products of the present invention, in the exothermic curve obtained when the hygroscopic exothermic material absorbs moisture by changing the environmental conditions from 20 ° C. and 20% RH to 20 ° C. and 90% RH. It is preferable that the predetermined heat generation lasts for 3 minutes or more.
By configuring a nonwoven fabric sheet for hygiene products from hygroscopic exothermic materials with such exothermic properties, the predetermined temperature can be maintained for a long time, eliminating the uncomfortable long time when using sanitary products Or the deterioration of cooling property can be prevented.

In constituting the nonwoven fabric sheet for sanitary products of the present invention, the weight mixing ratio of the copper ammonia rayon fiber and the acrylic fiber is preferably set to a value within the range of 30:70 to 70:30.
By configuring the non-woven fabric sheet for sanitary products in this way, it is possible to easily adjust the quick heat generation property, the heat generation time, or the physical properties and handleability of the non-woven fabric sheet for sanitary products.

In constructing the nonwoven fabric sheet for sanitary products of the present invention, the basis weight of the nonwoven fabric material is preferably set to a value within the range of 10 to 300 g / m ² .
By restricting the basis weight of the nonwoven fabric material to such a range, the physical properties and handling properties of the nonwoven fabric sheet for sanitary products can be easily adjusted.

Moreover, when comprising the nonwoven fabric sheet for sanitary products of this invention, it is preferable that the liquid-impermeable sheet | seat is laminated | stacked on the single side | surface.
By laminating the liquid-impermeable sheet on one side in this way, not only the durability and mechanical properties of the nonwoven fabric sheet for sanitary products are improved, but also the absorbed body fluid is easily released to the outside. Can be prevented.
In addition, since the nonwoven fabric sheet for sanitary products is composed of a nonwoven material formed by stitch bonding, it has a braided surface and a brushed back surface, but mainly uses the brushed back surface. Therefore, it is preferable that a liquid-impermeable sheet is laminated on the braided surface.

Another aspect of the present invention is a sanitary product including a nonwoven fabric sheet for hygiene products made of a hygroscopic exothermic material, wherein the hygroscopic exothermic material is formed by stitch-bonding a blend of copper ammonia rayon fiber and acrylic fiber. It is composed of a non-woven material, and in the exothermic curve obtained when the hygroscopic exothermic material absorbs moisture by changing the environmental conditions from 20 ° C. and 20% RH to 20 ° C. and 90% RH, an exothermic peak is reached within 60 seconds. And a hygienic product characterized in that the exothermic temperature difference defined by the difference between the initial temperature and the maximum exothermic temperature is 3 ° C. or more.
That is, by using a sanitary product comprising a predetermined non-woven fabric sheet for hygiene products, heat is generated quickly and the predetermined temperature can be maintained over a long period of time, making it easy to feel uncomfortable when using sanitary products. Can be resolved.

Moreover, when comprising the sanitary product of this invention, it is preferable to consist of any one of a panty liner, a sanitary napkin, an incontinence pad, a nonwoven fabric mask (including a gauze mask), or a paper diaper.
By configuring the sanitary product in this way, even if the nonwoven fabric sheet for sanitary products contained in part absorbs body fluid, it quickly generates a predetermined heat and it is maintained for a long time, A comfortable feeling can be obtained.

Further, in constituting the sanitary product of the present invention, when the sanitary product is a panty liner, the sanitary product non-woven fabric sheet is used as a liquid holding sheet, and on the back side of the liquid holding sheet, an impermeable sheet is used. In addition, it is preferable that a predetermined exothermic phenomenon is caused when the body fluid is absorbed from the surface side of the liquid holding sheet.
By constructing the panty liner in this way and using it, it is possible to maintain a moderate and quick heat generation by absorbing it without leaking even when the body fluid is discharged to the outside. .

FIG. 1 is a chart showing heat generation characteristics of a sanitary product nonwoven fabric sheet (corresponding to Example 1) and a conventional sanitary product nonwoven fabric sheet (corresponding to Comparative Example 1) of the present invention. FIG. 2 is a thermography showing heat generation characteristics of the nonwoven fabric sheet for sanitary products of the present invention (corresponding to Example 1). FIG. 3A is a diagram provided to explain an example of a nonwoven fabric sheet for sanitary products, and FIG. 3B illustrates a nonwoven fabric sheet for sanitary products provided with an impermeable sheet and an adhesive layer. FIG. 3C is a diagram provided for explaining a non-woven fabric sheet for sanitary products provided with a liquid-permeable sheet having a plurality of openings. FIG. 4 is a diagram for explaining a configuration example of a panty liner. FIGS. 5A to 5B are views for explaining a configuration example of a sanitary napkin. FIG. 6 is a diagram provided for explaining a configuration example of the incontinence pad. Drawing 7 is a figure offered in order to explain the example of composition of a nonwoven fabric mask. FIG. 8 is a diagram for explaining a configuration example of a disposable diaper. FIGS. 9A and 9B are views for explaining a configuration example of a conventional panty liner. FIGS. 10A and 10B are views for explaining a configuration example of a conventional sanitary napkin.

[First Embodiment]
1st Embodiment is the nonwoven fabric sheet for hygiene products which consists of a hygroscopic exothermic material, Comprising: The hygroscopic exothermic material is comprised from the nonwoven fabric material formed by stitch-bonding the blend of copper ammonia rayon fiber and an acrylic fiber. In the exothermic curve obtained when the hygroscopic exothermic material absorbs moisture by changing the environmental conditions from 20 ° C. and 20% RH to 20 ° C. and 90% RH, there is an exothermic peak within 60 seconds and the initial temperature It is a nonwoven fabric sheet for sanitary products, characterized in that the exothermic temperature difference defined by the difference between the maximum exothermic temperature is 3 ° C. or more.
Hereinafter, the nonwoven fabric sheet for sanitary products according to the first embodiment of the present invention will be specifically described with reference to drawings such as FIGS. 3 (a) to 3 (c) as appropriate.

1. Nonwoven fabric material (1) Heat generation characteristics 1
In the exothermic curve obtained when the moisture-absorbing exothermic material constituting the nonwoven material absorbs moisture by changing the environmental condition from 20 ° C. and 20% RH to 20 ° C. and 90% RH, line A in FIG. As shown in Example 1), an exothermic peak occurs within 60 seconds after the start of moisture absorption, and the exothermic temperature difference defined by the difference between the initial temperature and the maximum exothermic temperature is set to a value of 3 ° C. or more. It is characterized by that.
The reason for this is that if such a hygroscopic exothermic material, the raised portion 12a of the sanitary product nonwoven fabric sheet 10 as shown in FIG. 3 (a) absorbs body fluid on the heat insulating plate 10a, As shown in FIG. 2, since heat is generated quickly and a predetermined temperature is maintained for a long time, the uncomfortable feeling when using a sanitary product including the sanitary product nonwoven fabric sheet 10 is eliminated. This is because it can be done.
On the other hand, as shown in line B (corresponding to Comparative Example 1) in FIG. 1, in the case of a woven fabric composed of a mixed yarn of copper ammonia rayon fiber (cupra) and acrylic fiber (mixing weight ratio = 50: 50). Has an exothermic peak in the range of 100 to 200 seconds after the start of moisture absorption, and the exothermic temperature difference is about 1 ° C.
That is, it is understood that even if the same blended yarn material is used, the heat generation characteristics vary greatly between the form of a nonwoven fabric having raised portions and the form of a generally flat woven fabric.
Therefore, in the nonwoven fabric sheet 10 for sanitary products as shown in FIG. 3 (a), the hygroscopic exothermic material can be made in the form of a nonwoven fabric having the raised portions 12a, thereby improving the heat generation characteristics. Furthermore, it can be said that the heat generation characteristics can be further finely adjusted by combining some woven fabric forms.
The exothermic characteristics of the hygroscopic exothermic material can be adjusted by the mixing ratio (mixing ratio) of copper ammonia rayon fiber (cupra) and acrylic fiber, or the stitch bond condition (raised state), as will be described later. it can.

(2) Heat generation characteristics 2
Further, as shown in line A (corresponding to Example 1) in FIG. 1, the hygroscopic exothermic material constituting the nonwoven fabric material changes from 20 ° C. and 20% RH to 20 ° C. and 90% RH environmental conditions. In the exothermic curve obtained when the moisture is absorbed, it is preferable that the predetermined exotherm continues for 3 minutes or more after the start of moisture absorption.
The reason for this is that a hygroscopic exothermic material having such exothermic characteristics maintains a predetermined temperature for a long time, so that comfort for a long time when using a sanitary product composed of a non-woven sheet for sanitary products is long. This is because the badness can be eliminated or the deterioration of the cooling property can be prevented.
In the case of line A in FIG. 1 (corresponding to Example 1), a predetermined heat generation (22 ° C. or higher) continues for 3 minutes or more after the start of moisture absorption, and further a predetermined heat generation (21.5 ° C. or higher) for 5 minutes or more. ) Was confirmed to persist.

(3) Type The type of nonwoven fabric material, that is, the moisture-absorbing exothermic material constituting the nonwoven fabric material, is characterized in that it mainly comprises a blend of copper ammonia rayon fiber (cupra) and acrylic fiber, and more specifically, Is preferably at least 50% by weight or more of the total amount.
That is, if it is the nonwoven fabric material which consists of these blends, as shown by the line A (equivalent to Example 1) in FIG. 1, while being excellent in rapidity, the exothermic temperature itself is also high, and also predetermined | prescribed This is because the temperature can be maintained for a relatively long time and the durability is excellent.
More specifically, when copper ammonia rayon fiber (cupra) is blended with a predetermined amount of acrylic fiber, especially acrylic fiber containing acrylamide as a main component, when the external moisture is absorbed, the copper ammonia rayon fiber is mixed. It has been found that it functions to confine inside the (cupra) and thus inhibit the release of moisture and warm air.
On the other hand, it was found that a 100% copper ammonia rayon fiber (cupra) nonwoven material quickly absorbs external moisture, but immediately releases moisture to the outside, and the predetermined exothermic phenomenon does not continue. ing.
Therefore, by using a blend of copper ammonia rayon fiber (cupra) and acrylic fiber as a main component of the nonwoven material, as shown in line A (corresponding to Example 1) in FIG. It generates heat quickly within seconds and can sustain it for a relatively long time.

The mixing ratio (weight basis) of the copper ammonia rayon fiber and the acrylic fiber is preferably set to a value within the range of 30:70 to 70:30.
The reason for this is that by using a nonwoven fabric material having such a mixing ratio, it is possible to adjust the quick heat generation property, the heat generation time, or the physical properties and handleability of the nonwoven fabric sheet for sanitary products. .
Therefore, the mixing ratio (weight basis) of the copper ammonia rayon fiber and the acrylic fiber is more preferably set to a value within the range of 40:60 to 60:40, and within the range of 45:55 to 55:45. More preferably, the value of

In addition, it is also preferable to add a small amount of another fiber as a non-woven fabric material other than copper ammonia rayon fiber or acrylic fiber, more specifically, if it is in the range of 0.1 to 15% by weight relative to the total amount. .
Examples of such another fiber include one kind or a combination of two or more kinds such as cotton, pulp, silk, rayon, polyester, polyamide, polyolefin, polyvinyl alcohol, polyvinyl chloride, polypropylene, and lyocell.

(4) Basis weight It is also preferable that the nonwoven fabric material has a weight per unit area in the range of 10 to 200 g / m ² .
This is because the physical properties and handling properties of the nonwoven fabric sheet for sanitary products can be adjusted by limiting the basis weight of the nonwoven fabric material to such a range.
More specifically, this is because when the weight per unit area is less than 10 g / m ² , the absorbability of body fluid may be excessively lowered.
On the other hand, when the basis weight of such a nonwoven fabric material exceeds 200 g / m ² , it becomes a thick film, and the usability as a panty liner or the like may be deteriorated.
Accordingly, the basis weight of such a nonwoven fabric material is preferably set to a value within the range of 30 to 150 g / m ² , and more preferably set to a value within the range of 50 to 100 g / m ² .

(5) Single yarn fineness of fiber Further, it is preferable that the single yarn fineness of the copper ammonia rayon fiber and the acrylic fiber is set to a value within the range of 0.5 to 5 dtex in constituting the nonwoven fabric material.
This is because when the single yarn fineness of these fibers is less than 0.5 dtex, the wear resistance and mechanical strength may be significantly reduced.
On the other hand, when the single yarn fineness of these fibers exceeds 5 dtex, the wear resistance and the like are improved, but when the nonwoven fabric material is constituted, the flexibility and the shape followability may be lowered.
Accordingly, the single yarn fineness of these fibers is preferably set to a value within the range of 0.8 to 3 dtex, and more preferably set to a value within the range of 1 to 2 dtex.
The single yarn fineness of the copper ammonia rayon fiber and the acrylic fiber may be the same, but more preferably, the single yarn fineness of the copper ammonia rayon fiber is larger than the single yarn fineness of the acrylic fiber.

(6) Stitch bond In addition, fleece is basically formed from a plurality of non-woven materials including moisture-absorbing exothermic materials, and then the thermal bond method, chemical bond method, needle punch method, spunlace method (water flow entanglement method) Further, a predetermined nonwoven material can be obtained by bonding by various fleece bonding methods such as a stitch bond method and a steam jet method.
In addition, it is preferable to employ a stitch bond method using a needle punch because a braided surface and a brushed back surface can be formed at the same time and heat is generated using the brushed surface.
More specifically, in adopting the stitch bond method, a needle punch is used using a roll having needle-like objects (needle count 15 to 50, number of driven 20 to 50 / cm ² , needle depth 5 to 20 mm). It is preferable to do.
The stitch bond knitting-like pattern is not particularly limited, and may be, for example, a lattice shape, a staggered shape, a straight shape, a river shape, a spiral shape, a concentric shape, or an irregular pattern. good.

(7) Additives In order to improve the appearance and impart information, it is preferable to add a colorant to the nonwoven material or to apply a colorant to the surface of the nonwoven material.
Furthermore, since a deodorizing effect and an antistatic effect are obtained, it is preferable that a predetermined amount of an inorganic antibacterial agent is blended in the copper ammonia rayon fiber and / or the acrylic fiber.
That is, when Ag ₂ O, ZnO, CaO, B ₂ O ₃ and P ₂ O ₅ are included and the total amount is 100% by weight, the content of Ag ₂ O is 0.2 to 5% by weight. Values within the range, ZnO content in the range of 1 to 50% by weight, CaO content in the range of 0.1 to 15% by weight, B ₂ O ₃ content in the range of 0.1 A value in the range of ˜15% by weight and a P ₂ O ₅ content in the range of 30-80% by weight, and a weight ratio of ZnO / CaO in the range of 1.1-15 The antibacterial glass having an average particle diameter of 0.1 to 10 μm and further containing 0.1 to 15% by weight of agglomerated silica particles as a dispersing agent is added to the total amount of fibers. On the other hand, it is preferably contained in the range of 0.1 to 10% by weight.

(8) Moisture absorption rate The moisture absorption rate of the nonwoven fabric material containing copper ammonia rayon fiber and acrylic fiber is preferably set to a value in the range of 3 to 20%.
The reason for this is that when the moisture absorption rate of the nonwoven fabric material is less than 3%, the exothermic property as the nonwoven fabric material, in particular, the rapid heating property may be poor.
On the other hand, when the moisture absorption rate of such a nonwoven fabric material exceeds 20%, the moisture absorbability of the moisture absorption increases, and the exothermic property of the nonwoven fabric material may be reduced.
Therefore, the moisture absorption rate of the nonwoven fabric material is more preferably set to a value within the range of 5 to 15%, and further preferably set to a value within the range of 8 to 12%.
The moisture absorption rate of the nonwoven material is determined by, for example, leaving a predetermined weight of the nonwoven material for 24 hours in a desiccator maintained at 35 ° C. and 100% RH, and changing the weight (W1, W2) before and after the weight (W1, W2). It can be measured as (W2−W1) / W1 × 100).

2. Impervious sheet As shown in FIG. 3 (b), when the nonwoven fabric sheet for sanitary products 10 is basically used as a sheet member for absorbing bodily fluids, a liquid holding sheet for absorbing bodily fluids 12 is provided with an impermeable sheet 14 for holding bodily fluid and an adhesive layer 16 on the back surface side (knitted-like surface), and when absorbing bodily fluid from the surface side of the liquid holding sheet 12 In addition, it is preferable to cause a predetermined heat generation phenomenon.
Hereinafter, the aspect of the impermeable sheet 14 or the lamination method will be specifically described.

(1) Type The type of impervious sheet is not particularly limited, but specifically, polyester resin (polyethylene terephthalate resin), polyurethane resin, polyolefin resin, polyamide resin, fluororesin, silicone resin, phenoxy A single type of resin or the like, or a combination of two or more types can be used.
It is more preferable to use an impermeable sheet made of polyethylene terephthalate resin or polyurethane resin.
This is because such an impermeable sheet is highly versatile and economically advantageous, and by using these impermeable sheets, it can have both strength and flexibility properties. Because.

(2) Thickness The thickness of the impervious sheet can also be determined in consideration of the impermeability and mechanical strength of body fluids, the usability of sanitary products, etc. A value in the range of ˜50 μm is preferable.
The reason for this is that a value within the range of the thickness can effectively prevent the body fluid from permeating and flowing out to the outside, and can obtain predetermined flexibility and mechanical strength. is there.
Therefore, the thickness of the impermeable sheet is more preferably set to a value within the range of 1 to 30 μm, and further preferably set to a value within the range of 2 to 20 μm.

Moreover, it is preferable to make the contact angle (measurement temperature: 25 degreeC, measurement sample: pure water) measured based on JISK6768 of a non-permeable sheet | seat into 60 or more values.
The reason for this is that by setting the contact angle of the impermeable sheet to a value within such a range, the absorbed body fluid can be effectively prevented from permeating to the outside or evaporating.
Therefore, the contact angle of the impermeable sheet is more preferably set to a value within the range of 65 to 95 °, and further preferably set to a value within the range of 70 to 90 °.

(3) Surface processing Moreover, it is also preferable to perform predetermined | prescribed surface treatment processing (embossing, peeling processing, or silicic acid flame treatment etc.) on the surface of an impermeable sheet.
This is because by applying a predetermined surface treatment, it is possible to further improve the flexibility and stretchability when using the nonwoven fabric sheet for sanitary goods, and to improve the printing characteristics.

(4) Lamination method Moreover, in order to laminate | stack an impermeable sheet | seat and a nonwoven material, it is preferable that the several thermocompression-bonding part is provided.
The reason for this is that by providing predetermined openings at a plurality of locations corresponding to the thermocompression bonding portion of the impermeable sheet, the flexibility and shape following property of the impermeable sheet itself, and further, the flexibility of the nonwoven fabric sheet for sanitary goods can be obtained. This is because the property and the shape following property can be adjusted.
Therefore, even when a polyethylene terephthalate resin film or the like is used as the impermeable sheet, a good feeling of use can be obtained when used as a panty liner or the like.

3. Furthermore, as shown in FIG.3 (c), several opening part 20 is provided in the surface side of the liquid holding sheet 12, ie, the opposite side to the liquid holding sheet 12 side in which the impermeable sheet 14 was provided. It is also preferable to provide a liquid-permeable sheet 18 having
The reason for this is that by providing such a liquid-permeable sheet 18, it is possible not only to adjust the absorption rate and absorption amount of body fluid to the liquid-holding sheet 12, but also to follow the flexibility and shape of the liquid-permeable sheet 12 itself. This is because the flexibility and the shape followability of the nonwoven fabric sheet 10 for sanitary goods can be adjusted.
In addition, the liquid holding sheet 12 may absorb body fluid and may be colored or discolored to impair the aesthetic appearance. However, there is a liquid permeable sheet 18 that is opaque or colored. This is because the appearance change of the liquid holding sheet 12 can be covered.

(1) Opening In addition, the arrangement pattern of the plurality of openings is not particularly limited, and for example, a lattice shape, a staggered shape, a straight shape, a river shape, a spiral shape, a concentric shape, or an irregular shape. It may be a pattern.
However, when the arrangement pattern of the plurality of openings is a lattice pattern or other regular pattern, the pore size of the openings described later and the adjacent distance are adjusted, so that the liquid-permeable sheet, and hence the nonwoven fabric sheet for sanitary goods, is flexible. There is an advantage that the adjustment of the property and the shape following property becomes easy.

In addition, the planar shape of the opening is not particularly limited, but is usually preferably one of a circle, an ellipse, a quadrangle, an ellipse, a rhombus, a triangle, a star, and an irregular shape.
Among these, the shape of the opening is more preferably a circle or a rectangle.
The reason for this is that an opening having such a planar shape can be stably formed, and the flexibility and shape followability of the liquid-permeable sheet, and thus the nonwoven fabric sheet for sanitary goods, can be easily adjusted. It is to become.
Furthermore, if the shape of the opening is an ellipse, it can be stably formed, and the liquid-permeable sheet, and thus the anisotropy in the width direction and the length direction in the sanitary product, is anisotropic. It is because it can have.

In addition, the hole diameter (d1) of the opening is preferably set to a value in the range of 0.05 to 3 mm.
The reason for this is that the liquid-permeable sheet, and thus the non-woven fabric sheet for sanitary goods, can easily be made flexible and conformable without excessively reducing the mechanical strength and transpiration of the liquid-permeable sheet. This is because it can be controlled. Moreover, if it is this magnitude | size, it is because moderate adhesiveness is obtained between a liquid-permeable sheet and a nonwoven fabric sheet.
Accordingly, the hole diameter (d1) of the opening of the liquid permeable sheet is more preferably set to a value within the range of 0.1 to 1 mm, and further preferably set to a value within the range of 0.2 to 0.8 mm. .

Further, the number density (existence density or existence ratio) of the openings is preferably set to a value in the range of 2 to 70 / cm ² .
The reason for this is that when the number density of the openings is less than 2 / cm ² , the liquid permeable sheet, and thus the nonwoven fabric sheet for sanitary goods, is significantly less flexible or conformable, and the liquid permeable sheet This is because the adhesion between the fiber layer and the fiber layer may decrease.
On the other hand, if the number density of the openings exceeds 70 / cm ² , it may be difficult to form the openings stably or the permeability of body fluids may be excessive.
Accordingly, the number density of the openings of the liquid-permeable sheet is more preferably set to a value within the range of 20 to 65 / cm ² , and further preferably set to a value within the range of 30 to 60 / cm ^2. .
The number density of the plurality of openings does not necessarily have to be the same over the entire surface of the liquid permeable sheet, and the number density is increased by appropriately selecting a location where good flexibility and shape followability are desired. It is also preferable.

(2) Thickness Although the thickness of the liquid permeable sheet is not particularly limited, it is usually 0 in consideration of the permeability and mechanical strength of body fluids, the usability of sanitary products, and the like. A value in the range of 0.05 to 30 μm is preferable, a value in the range of 0.1 to 20 μm is more preferable, and a value in the range of 0.5 to 10 μm is even more preferable.

(3) Lamination method The lamination method between the liquid permeable sheet and the nonwoven fabric material (nonwoven fabric sheet) is not particularly limited, and the above-described impermeable sheet and the nonwoven fabric material are thermocompression bonded. When the layers are laminated, they may be thermocompression bonded at the same time, or may be laminated by applying an adhesive between the liquid-permeable sheet and the nonwoven material.

4). In addition, it is preferable to form a decorative layer (including a colored layer) on the surface of either the impermeable sheet, the liquid permeable sheet, or the nonwoven fabric sheet.
The reason for this is that the impermeable sheet or the like located on the outer surface during use is colored, decorated, or even printed with letters, etc. Or it is because information nature improves.
For example, in the case of forming a panty liner for women from a nonwoven fabric sheet for sanitary goods, it is preferable to color a pastel color such as pink, give a floral pattern or the like, or print a predetermined number or the like.

[Second Embodiment]
The second embodiment of the present invention is a sanitary product including a nonwoven fabric sheet for sanitary products made of a hygroscopic exothermic material, wherein the hygroscopic exothermic material is formed by stitching out a blend of copper ammonia rayon fiber and acrylic fiber. It is composed of a non-woven material, and in the exothermic curve obtained when the hygroscopic exothermic material absorbs moisture by changing the environmental conditions from 20 ° C. and 20% RH to 20 ° C. and 90% RH, an exothermic peak is reached within 60 seconds. And a hygienic product characterized in that the exothermic temperature difference defined by the difference between the initial temperature and the maximum exothermic temperature is 3 ° C. or more.
That is, by using such a sanitary product, even if the nonwoven fabric sheet contained in part absorbs bodily fluid, it quickly generates a predetermined heat and is maintained for a long time. A feeling of use can be obtained.
Hereinafter, the specific example of the sanitary product which is 2nd Embodiment of this invention is demonstrated concretely, referring a figure.

1. As shown in FIG. 4, as an example, the panty liner 100 includes a liquid holding sheet 115 and a back sheet 112 stacked on the clothing side of the liquid holding sheet 115.
Further, in the case of the panty liner 100 shown in FIG. 4, a further nonwoven fabric sheet 116 is provided between the liquid holding sheet 115 and the back sheet 112, and the liquid holding property and the like are reinforced.
The liquid holding sheet 115 is formed from a plurality of

non-woven fabrics

117 and 118, and the

non-woven fabrics

117 and 118 appear together on the skin side surface.
For example, the liquid holding sheet 115 has a skin side surface formed of hydrophilic fibers and a hydrophobic or weakly hydrophilic synthetic resin fiber layer 117, and a clothing side surface formed of at least a hydrophilic fiber layer 118.
Therefore, in such a panty liner 100, the

nonwoven fabrics

117 and 118 having a liquid holding function appear integrally on the skin side surface, and a surface sheet (top sheet) that exhibits only the liquid transmission function can be omitted. .
That is, in the panty liner 100, the secreted body fluid is directly held by the

nonwoven fabrics

117 and 118, so that the absorption and retention of the body fluid is quick. Moreover, since the liquid holding sheet 115 formed of the plurality of

nonwoven fabrics

117 and 118 has a hydrophilic gradient so that the hydrophilicity increases toward the back sheet 112, the body fluid given to the skin side surface Is quickly absorbed in the

nonwoven fabrics

117 and 118 forming the liquid holding sheet 115.
Therefore, the non-woven fabric sheet for sanitary products of the first embodiment can be used as any constituent part of the panty liner, but since it generates a predetermined heat and improves the feeling of use, It can be said that it is preferable to use the formed liquid holding sheet.
In addition, since the nonwoven fabric sheet for sanitary products of the first embodiment is rich in elasticity and excellent in deformability (followability), even when used as a panty liner, there is a sense of incongruity when used. The effect of being extremely small can also be obtained.

2. As shown in the overall perspective view of FIG. 5A and the development view of FIG. 5B, the sanitary napkin 200 is an example, but the sanitary napkin 200 includes a liquid-impermeable back sheet 202, a liquid-permeable The absorbent body 204 or the absorbent body 204 surrounded by the crepe paper 205 is interposed between the permeable surface sheet 203 and the moisturizing agent is held between the liquid-permeable surface sheet 203 and the absorbent body 204. The sheet 206 is arranged.
Further, fin-shaped side nonwoven fabrics 209 are provided on both sides of the surface side, and solid gathers 207 are provided in a vertical line shape.
Then, around the absorbent body 204, the liquid-impermeable back sheet 202 and the liquid-permeable surface sheet 203 are bonded together by an adhesive means such as a hot melt adhesive.
Therefore, although the nonwoven fabric sheet for sanitary products of the first embodiment can be used as any constituent part of the sanitary napkin 200, it generates a predetermined heat and improves the feeling of use. It is preferable to use the liquid surface sheet 203 itself or the moisturizing agent holding sheet 206 between the liquid permeable surface sheet 203 and the absorber 204.
And since the nonwoven fabric sheet for sanitary products of 1st Embodiment is rich in a stretching property and excellent in a deformability (followability), even if it is used as a part of sanitary napkin 200, it is used. There is also an effect that there is very little discomfort when doing so.

In addition, about each detail of the sanitary napkin 200, it can also be made to be the same as that of the structure of a well-known sanitary napkin, or can also be used suitably changing.
Therefore, the liquid-impervious back sheet 202 is made of a sheet material having at least water-impervious properties such as polyethylene and polypropylene, but in addition to this, a non-woven fabric after substantially ensuring liquid impermeability through a waterproof film. A sheet or the like can be used.
In addition, as the absorbent body 204, for example, a material in which a highly water-absorbing resin is mixed in pulp, or a material in which chemical fibers are mixed in the pulp and a highly water-absorbing resin is mixed is used. In other words, it is desirable that the absorbent body 204 is wrapped with an absorbent sheet 205 such as crepe paper in order to maintain the shape and quickly diffuse menstrual blood and prevent reverse return of menstrual blood once absorbed.

3. Incontinence Pad As shown in FIG. 6, as an example, the incontinence pad 300 includes a cotton-like pulp or the like between a liquid-permeable top sheet 301 made of a nonwoven fabric and a back sheet 302 made of polyethylene or the like. This is a structure in which an absorbent body 303 is interposed and laminated with an adhesive 305.
The absorbent body 303 is formed in a rectangular shape and is surrounded by crepe paper (not shown) in order to maintain the shape and improve the diffusibility of the body fluid that has passed through the liquid-permeable top sheet 301. .
Moreover, as the liquid-permeable top sheet 301 which covers the surface side (skin contact surface side) of the absorber 303, a porous or non-porous nonwoven fabric or the like is preferably used, and a straight line is used so that no body fluid leaks. A solid three-dimensional gather 304 is provided.
Therefore, although the nonwoven fabric sheet for sanitary products of 1st Embodiment can be used as any component part of the incontinence pad 300, since predetermined | prescribed heat_generation | fever is improved and a usability | use_condition is improved, especially an absorber. It is preferable to use it as a nonwoven fabric constituting 303.
And since the nonwoven fabric sheet for sanitary products of 1st Embodiment is rich in a stretching property and excellent in a deformability (followability), it is used even when it is used as a part of the incontinence pad 300. The effect that there is very little discomfort at the time is also obtained.

4). Nonwoven Mask As shown in FIG. 7, as an example, the nonwoven fabric mask 400 is a multilayer type, a fiber mask member 403 made of chemical fibers, and a nonwoven fabric mask member 401 made of a plurality of nonwoven fabrics. 402 and a cotton fabric mask member 404 made of cotton or gauze.
That is, by using a plurality of materials as the nonwoven fabric mask 400 and using it in multiple layers, it is possible to provide a high-performance mask that is inexpensive but can reliably block viruses and prevent entry into the human body.
Therefore, although the nonwoven fabric sheet for sanitary products of 1st Embodiment can be used as any component part of the nonwoven fabric mask 400, since it produces | generates predetermined | prescribed heat | fever and improves a usability | use_condition, it is especially a nonwoven fabric. It is preferable to use it as a mask member.
And since the nonwoven fabric sheet for sanitary products of 1st Embodiment is rich in elasticity and excellent in a deformability (followability), even when it is used as a part of a nonwoven fabric mask, There is also an effect that there is very little discomfort.

5. 8. As shown in FIG. 8, in the case of a paper diaper 500, particularly an adult pants-type diaper, as shown in FIG. 8, the liquid-impermeable outer sheet 501 is fixed to the inner surface of the outer sheet 501, and the inseam Is mainly composed of an absorber 510 extending in the longitudinal direction (front-rear direction).
The exterior sheet 501 is configured by laminating and fixing two air-permeable / water-repellent nonwoven fabrics.
Therefore, although the nonwoven fabric sheet for sanitary products of 1st Embodiment can be used as any component part of the paper diaper 500, since predetermined | prescribed heat_generation | fever is improved and a usability | use_condition is improved, especially an absorber. 510 or the exterior sheet 501 is preferably used.
And since the nonwoven fabric sheet for sanitary products of 1st Embodiment is rich in a stretching property and excellent in a deformability (followability), even if it is used as a part of the paper diaper 500, when using it. It is also possible to obtain an effect that there is very little discomfort.

Hereinafter, the present invention will be described in more detail with reference to examples. However, the following description shows the present invention by way of example, and the present invention is not limited to these descriptions.

[Example 1]
1. Preparation of sanitary goods (panty liner) (1) Preparation of non-woven fabric sheet for sanitary goods 50% by weight of copper ammonia rayon fiber having a single yarn fineness of 1.4 dtex and fiber length of 50 mm, acrylamide having a single yarn fineness of 1 dtex and fiber length of 50 mm A fleece was prepared from 50% by weight of a fiber (acrylamide: solution polymer composed of methyl acrylate = 70/30), and then a nonwoven fabric sheet for sanitary goods was prepared using a stitch bond device.
That is, for a fleece that is a blended product, needle punching is performed using a roll having a needle-like material (needle count 40, number of driven-in 35 / cm ² , needle depth 10 mm), and used for sanitary goods having a thickness of 1.5 mm. A nonwoven sheet was obtained.

(2) Thermocompression bonding step Next, an impermeable sheet (polyester sheet having a thickness of 15 μm) with an acrylic pressure-sensitive adhesive is laminated on the back side (knitted-like surface side) of the nonwoven fabric sheet for sanitary goods, and further shaped into a predetermined shape After cutting, a panty liner having a form as shown in FIG. 4 was finally formed.

2. Evaluation of sanitary products (panty liner) (1) Heat generation evaluation 1 (Evaluation 1)
The obtained panty liner was stored in a desiccator maintained at 20 ° C. and 20% RH for 24 hours, and then moved to a desiccator maintained at 20 ° C. and 90% RH. Was measured as a heat generation curve using a thermoviewer. And quick heat property was evaluated according to the following reference | standard.
A: There is an exothermic peak temperature within 30 seconds after the start of moisture absorption.
○: There is an exothermic peak temperature within 60 seconds after the start of moisture absorption.
Δ: Exothermic peak temperature is present within 90 seconds after the start of moisture absorption.
X: Exothermic peak temperature or no exothermic peak in 90 seconds after the start of moisture absorption.

(2) Exothermic evaluation 2 (Evaluation 2)
The obtained panty liner was stored in a desiccator maintained at 20 ° C. and 20% RH for 24 hours, and then moved to a desiccator maintained at 20 ° C. and 90% RH. Measurement was performed using a thermoviewer. And exothermic property was evaluated according to the following reference | standard.
A: Exothermic temperature difference is 4 ° C. or more.
○: Exothermic temperature difference is 3 ° C. or more.
Δ: Exothermic temperature difference is 2 ° C. or more.
X: Exothermic temperature difference is less than 2 degreeC.

(3) Exothermic evaluation 3 (Evaluation 3)
The obtained panty liner was stored in a desiccator maintained at 20 ° C. and 20% RH for 24 hours, then moved to a desiccator maintained at 20 ° C. and 90% RH, and heated at 2 ° C. or higher. The duration of the phenomenon was measured, and the exothermic persistence was evaluated according to the following criteria.
A: The time for which the predetermined exothermic phenomenon lasts is 300 seconds or longer.
○: The time during which the predetermined heat generation phenomenon lasts is 180 seconds or longer.
Δ: The time during which the predetermined heat generation phenomenon lasts is 60 seconds or longer.
X: The time for which the predetermined exothermic phenomenon lasts is less than 60 seconds.

(4) Absorbability of body fluid (Evaluation 4)
The obtained panty liner was allowed to absorb 100 cc of artificial urine (ammonia water), and the absorbability of body fluid was evaluated according to the following criteria.
A: The artificial urine can be absorbed within 30 seconds.
○: Artificial urine can be absorbed within 60 seconds.
Δ: Artificial urine can be absorbed within 90 seconds.
X: Artificial urine cannot be absorbed within 90 seconds.

(5) Flexibility (Evaluation 5)
The flexibility of the obtained panty liner was judged from its foldability (four-fold state) and evaluated according to the following criteria.
(Double-circle): Even if it is a non-pressurized state, it can maintain a four-fold state as it is, without restoring | restoring.
○: When the pressure is not applied, it is slightly restored, but the quadruple state can be substantially maintained.
Δ: Although it is considerably restored when it is brought into the non-pressurized state, the four-fold state can be managed somehow.
X: If it is made into a non-pressurized state, it will be restored to its original shape and the four-fold state cannot be maintained.

[Example 2]
In Example 2, a non-woven fabric sheet for sanitary goods was prepared from 60% by weight of copper ammonia rayon fiber having a single yarn fineness of 1.4 dtex and a fiber length of 50 mm, and 40% by weight of acrylamide fiber having a single yarn fineness of 1 dtex and a fiber length of 50 mm. In the same manner as in Example 1, a panty liner was prepared and evaluated.

[Example 3]
In Example 3, a nonwoven sheet for sanitary goods was prepared from 40% by weight of copper ammonia rayon fiber having a single yarn fineness of 1.4 dtex and a fiber length of 50 mm, and 60% by weight of acrylamide fiber having a single yarn fineness of 1 dtex and a fiber length of 50 mm. In the same manner as in Example 1, a panty liner was prepared and evaluated.

[Example 4]
In Example 4, a non-woven fabric sheet for hygiene articles was prepared from 70% by weight of copper ammonia rayon fiber having a single yarn fineness of 1.4 dtex and a fiber length of 50 mm, and 30% by weight of acrylamide fiber having a single yarn fineness of 1 dtex and a fiber length of 50 mm. In the same manner as in Example 1, a panty liner was prepared and evaluated.

[Example 5]
In Example 5, a non-woven fabric sheet for sanitary goods was prepared from 30% by weight of copper ammonia rayon fiber having a single yarn fineness of 1.4 dtex and a fiber length of 50 mm, and 70% by weight of acrylamide fiber having a single yarn fineness of 1 dtex and a fiber length of 50 mm. In the same manner as in Example 1, a panty liner was prepared and evaluated.

[Example 6]
In Example 6, the nonwoven fabric sheet for sanitary goods was prepared by changing to a roll having a needle-like material (number of needles 40, number of driven 40 / cm ² , needle depth of 12 mm) for the conditions of stitch bonding. A panty liner was prepared and evaluated in the same manner as in Example 1.

[Example 7]
In Example 7, a nonwoven fabric sheet for sanitary goods was prepared by changing to a roll having needle-like objects (needle count 40, number of driven 20 / cm ² , needle depth 5 mm) for the conditions of stitch bond, A panty liner was prepared and evaluated in the same manner as in Example 1.

[Example 8]
In Example 8, antibacterial glass (manufactured by Koa Glass Co., Ltd., Million Killer PG701) was blended in the acrylamide fiber so as to have a concentration of 1.5% by weight, and a nonwoven fabric sheet for sanitary goods was prepared. A panty liner was prepared and evaluated in the same manner as in Example 1.

[Comparative Example 1]
In Comparative Example 1, spinning was performed from 50% by weight of copper ammonia rayon fiber having a single yarn fineness of 1.4 dtex and a fiber length of 50 mm, and 50% by weight of acrylamide fiber having a single yarn fineness of 1 dtex and a fiber length of 50 mm. A panty liner was prepared and evaluated in the same manner as in Example 1 except that a woven fabric was prepared based on this.

As described above in detail, according to the nonwoven fabric sheet for sanitary products of the present invention, a predetermined hygroscopic exothermic fiber material can be exhibited in the form of a nonwoven fabric, thereby exhibiting predetermined heat generation characteristics. When a bodily fluid (blood, urine, etc.) is absorbed, heat is quickly generated and a predetermined temperature can be maintained for a long time.
Therefore, when a panty liner, a sanitary napkin, or the like is constructed from a non-woven fabric sheet for sanitary products, the uncomfortable feeling when the hygiene product absorbs moisture can be easily eliminated.

10: Non-woven fabric sheet for sanitary products 10a: Heat insulating plate 12: Liquid holding sheet 12a: Raised portion 12b: Braided surface 14: Impermeable sheet 16: Adhesive layer 18: Liquid permeable sheet 20: Opening 100: Panty liner 200: Sanitary napkin 300: Incontinence pad 400: Non-woven mask 500: Paper diaper

Claims

A non-woven fabric sheet for hygiene products made of hygroscopic exothermic material,
The hygroscopic exothermic material is composed of a nonwoven material formed by stitch-bonding a blend of copper ammonia rayon fiber and acrylic fiber,
In the exothermic curve obtained when the hygroscopic exothermic material absorbs moisture by changing the environmental conditions from 20 ° C. and 20% RH to 20 ° C. and 90% RH, there is an exothermic peak within 60 seconds,
And the nonwoven fabric sheet for sanitary products characterized by making the exothermic temperature difference defined by the difference of initial temperature and maximum exothermic temperature into the value of 3 degreeC or more.
In the exothermic curve obtained when the hygroscopic exothermic material absorbs moisture by changing from 20 ° C. and 20% RH to an environmental condition of 20 ° C. and 90% RH, the predetermined exotherm continues for 3 minutes or more. The nonwoven fabric sheet for sanitary products according to claim 1.
The nonwoven fabric sheet for sanitary products according to claim 1 or 2, wherein a weight mixing ratio of the copper ammonia rayon fiber and the acrylic fiber is set to a value within a range of 30:70 to 70:30. .
The nonwoven fabric sheet for sanitary products according to any one of claims 1 to 3, wherein the basis weight of the nonwoven fabric material is set to a value within a range of 10 to 300 g / m 2 .
The sanitary product nonwoven fabric sheet according to any one of claims 1 to 4, wherein the liquid-impermeable sheet is laminated on one side.
A hygiene product comprising a hygroscopic exothermic material nonwoven fabric sheet for hygiene products,
The hygroscopic exothermic material is composed of a nonwoven material formed by stitch-bonding a blend of copper ammonia rayon fiber and acrylic fiber,
In the exothermic curve obtained when the hygroscopic exothermic material absorbs moisture by changing the environmental conditions from 20 ° C. and 20% RH to 20 ° C. and 90% RH, there is an exothermic peak within 60 seconds,
The sanitary product is characterized in that the exothermic temperature difference defined by the difference between the initial temperature and the maximum exothermic temperature is 3 ° C or more.
The sanitary product according to claim 6, comprising any one of a panty liner, a sanitary napkin, an incontinence pad, a non-woven mask, or a paper diaper.
When the sanitary product is a panty liner, the nonwoven fabric sheet for sanitary products is used as a liquid holding sheet, an impermeable sheet and an adhesive layer are provided on the back side of the liquid holding sheet, and The sanitary product according to claim 6, wherein a predetermined exothermic phenomenon is caused when the body fluid is absorbed from the surface side of the liquid holding sheet.