TW202335654A - Sanitary article - Google Patents

Abstract

Provided is a sanitary article, which settles a drug solution for skin care on a contact surface to be brought into contact with the skin of a wearer so as to increase a skin care effect of the drug solution. This sanitary article (1), which is designed to be worn by the wearer, comprises a first sheet (11) including a contact surface (10a) to be brought into contact with the skin (S) of the wearer; the first sheet (11) includes first fibers containing hydrophilic resin and/or second fibers having a surface area increasing structure on the fiber surface, and is configured such that a drug solution (40) for skin care is applied to the contact surface (10a).

Description

hygiene products

The present invention relates to a sanitary product.

Hygiene products in which a skin care liquid is applied to a contact surface with the wearer's skin have been previously known (see, for example, Patent Documents 1 to 4). [Prior technical literature] [Patent Document]

[Patent Document 1] Japanese Patent Application Laid-Open No. 2004-255164 [Patent Document 2] Japanese Patent Application Laid-Open No. 2015-171649 [Patent Document 3] Japanese Patent Application Publication No. 2021-84906 [Patent Document 4] Japanese Patent Application Laid-Open No. 2021-186662

[Problem to be solved by the invention]

However, in previous sanitary products, when the medical solution is applied to the contact surface, the medical solution will pass through the gaps between the fibers, making it difficult to fix the medical solution on the contact surface. Therefore, there is a problem that the skin care effect of the medicinal liquid is reduced.

The present invention was completed with an eye on the above-mentioned problems, and its object is to provide a sanitary product that can fix the skin care liquid on the contact surface with the wearer's skin and improve the skin care effect of the liquid. [Technical means to solve problems]

In order to achieve the above object, the present invention is a sanitary product worn by a wearer, which is provided with a sheet having a contact surface with the skin of the wearer, and the sheet is composed of a first material containing a hydrophilic resin. At least one of the fiber and the second fiber having a surface area increasing structure on the fiber surface is coated with a skin care liquid on the contact surface. [Effects of the invention]

Thereby, the sanitary product of the present invention can fix the medicinal liquid for skin care on the contact surface with the wearer's skin, thereby improving the skin care effect of the medicinal liquid.

Based on Example 1 shown in the drawings, the form of the sanitary product for implementing the present invention will be described. In addition, the sanitary article of the present invention is suitable for absorbent articles that can absorb the body fluids of the wearer, such as sanitary napkins, leucorrhea sheets, incontinence pads, medical pads, and disposable diapers. In addition, the sanitary product of the present invention can also be applied to a mask that covers the wearer's nose and mouth and is used to block droplets. In Example 1, a sanitary product 1 suitable for use as a sanitary napkin for wearing under underwear and absorbing body fluids (menstrual blood or leucorrhea) will be described.

The sanitary product 1 of Example 1 is equipped with the front sheet 10 (front material), the absorbent member 20, and the back sheet 30, as shown in FIG.

The front sheet 10 is a liquid-permeable film member that allows body fluids to quickly pass through. The front sheet 10 has a contact surface 10a that comes into contact with the wearer's skin S when the sanitary product 1 is used.

The absorbent member 20 is disposed between the front sheet 10 and the back sheet 30 and absorbs body fluids that have passed through the front sheet 10 . The absorbent member 20 is formed by laminating cotton pulp, absorbent paper, super absorbent polymer, and the like. In addition, super absorbent polymers have the function of rapidly absorbing 50 to 100 times of their own weight in liquid, gelling and retaining the absorbed liquid.

The back sheet 30 is a liquid-impermeable film member that restricts leakage of body fluids. The back sheet 30 is laminated with the absorbent member 20, covers the back side of the absorbent member 20, and comes into contact with the underwear P when the sanitary product 1 is used. In addition, the peripheral portion of the back sheet 30 is joined to the peripheral portion of the front sheet 10 by an adhesive such as hot melt glue or a bonding mechanism such as heat sealing. Furthermore, an anti-offset adhesive (not shown) for fixing the sanitary product 1 to the underwear P is provided on the outer side 30a of the back sheet 30 in contact with the underwear P.

Furthermore, as shown in FIG. 2 , the front sheet 10 of Example 1 is composed of a first sheet 11 (sheet) and a second sheet 12 (second sheet) overlapped with the first sheet 11 , forming a so-called double layer. structure.

The first sheet 11 is disposed on the front side (skin S side) of the front sheet 10 and has a contact surface 10a that comes into contact with the skin S. The medical solution 40 for skin care is applied to the contact surface 10a (refer to FIG. 2), and a medical solution layer is formed on the front side of the contact surface 10a. Here, the chemical solution 40 is evenly applied to substantially the entire surface of the contact surface 10a.

In addition, the medicinal solution 40 contains, for example, components such as glycerin, hyaluronic acid, and shea butter. In addition, the skin care effect of the medicinal solution 40 is, for example, moisturizing the skin S, reducing friction between the sanitary product 1 and the skin S, improving the barrier function of the skin S, etc. The chemical solution 40 is applied to the contact surface 10a of the first sheet 11 by, for example, a non-contact coating method such as spray coating or a contact coating method such as printing (transfer).

The second sheet 12 is laminated on the non-contact surface 10b of the first sheet 11 located on the opposite side to the contact surface 10a. That is, the second sheet 12 is arranged on the back side (the absorbing member 20 side) of the front sheet 10 .

Furthermore, the first sheet 11 and the second sheet 12 are each formed of a nonwoven fabric including at least one of a first fiber containing a hydrophilic resin and a second fiber having a surface area-increasing structure on the fiber surface.

Here, the first fiber is formed by kneading the hydrophilic resin into the inside of the hydrophobic synthetic fiber. By containing hydrophilic resin, the first fiber absorbs moisture in the air and forms a water film on the surface of the hydrophobic synthetic fiber. In addition, the first fiber can be electrically diffused through a water film formed by a hydrophilic resin to reduce the generation of static electricity. In addition, the hydrophilic resin may be adhered to the surface of the hydrophobic synthetic fiber by blowing or coating, and may be included in the first fiber.

Furthermore, the "surface area increasing structure" possessed by the second fiber is a structure that increases (enlarges) the surface area compared to a fiber with a smooth fiber surface and a circular cross-sectional profile, such as unevenness or undulations formed on the fiber surface. , shrinkage, scaly scales, etc. By having a surface area increasing structure, the second fiber forms an uneven cross-sectional profile. Moreover, as the second fiber, specifically, special-shaped cross-section fibers, crimped fibers, heat-shrinkable fibers, natural fibers, etc. can be used. Special-shaped cross-section fibers, as shown in Figures 3A and 3B, are synthetic fibers formed into special shapes (triangular, star-shaped, Y-shaped, hollow, flower-shaped, etc.) that are not circular in cross-section. As shown in Figure 4, the fibers of crimped fibers are fibers that shrink and deform, not straight lines. The crimped fiber may be a natural fiber that exhibits crimp like wool, or a synthetic fiber that has crimpability added by false twist processing (pile processing). As shown in Figure 5, the fibers of heat-shrinkable fibers are synthetic fibers that shrink by heat processing and are not linear. Natural fibers are fibers whose main raw material is natural materials and are roughly divided into "plant fibers" and "animal fibers". "Plant fibers" are, for example, flax (sample 1 shown in Figure 6), kapok (sample 2), etc. "Animal fiber" is, for example, silk (Sample 3 shown in Figure 6), wool (Lincoln species: Sample 4, Merino species: Sample 5). Compared with general synthetic fibers such as Sample 6 (polyester) shown in Figure 6, fibers like Samples 1 to 5 have uneven or undulating, shrinkage, and scaly scales on the surface of the fiber, resulting in an increased surface area. The second fiber of the structure. In addition, the second fiber may be a fiber that has both the characteristics of a special-shaped cross-section fiber such as a special-shaped crimped fiber and the characteristics of a crimped fiber.

Furthermore, the first fiber and the second fiber included in the first sheet 11 and the second sheet 12 are both set to have a single-filament fineness of 2 dtex or less. Since the single-filament fineness is 2 dtex or less, the first fiber and the second fiber are thin fibers compared with the general clothing fibers whose single-filament fineness is about 3.33 dtex (3 denier).

Furthermore, the first sheet 11 and the second sheet 12 are preferably formed by thermal bonding, spun bonding, melt blowing, or the like. In addition, the weight per unit area of the first sheet 11 and the second sheet 12 is preferably about 10 to 40 gsm. Furthermore, the first sheet 11 and the second sheet 12 may be formed of the same material or may be formed of different materials.

In addition, the first sheet 11 of Example 1 is pressed against the second sheet 12 by thermal embossing processing, and the first sheet 11 and the second sheet 12 are joined. In Example 1, the entire surface of the first sheet 11 is uniformly subjected to the thermal embossing process, and the embossing pattern 41 of the thermal embossing process is formed on the entire surface of the first sheet 11 . In addition, the "embossed pattern" is the area that is depressed by the heat and pressure of the hot embossing process to compress the fibers.

Furthermore, as shown in FIG. 7 , the pressing pattern 41 has a circular shape with a diameter r and a length of 1 mm or more and 5 mm or less when viewed from above. In addition, the distance W between adjacent pressing patterns 41 is set to 5 mm or less.

Furthermore, as shown in FIG. 2 , the top sheet 10 of Example 1 is adhered to the absorbent member 20 through the adhesive 42 uniformly applied between the top sheet 10 and the absorbent member 20 . Here, the adhesive 42 is ejected in a linear (fibrous) form from a single micro ejection port, or as schematically shown in FIG. 8 , from a plurality of micro ejection ports arranged in a certain direction, and simultaneously in a linear form. Coating is carried out using the curtain-type spray method (the whole is in the shape of a curtain with a specific width). The coating pattern T of the adhesive 42 using the curtain spray method, as shown enlarged in FIG. 8 , is in the shape of randomly oriented fibers when viewed from above.

In addition, as shown schematically in FIG. 9 , the adhesive 42 can also be applied by a slit coating method in which the adhesive 42 is ejected from a nozzle elongated in a certain direction and applied in a strip shape with a specific width. cloth. The slit coating method includes a method of applying the adhesive 42 on a roller (see FIG. 9 ) and a method of applying the adhesive 42 using tension between rollers (not shown). Regardless of the method, the adhesive 42 can be applied continuously or intermittently, as shown in an enlarged view in FIG. 9 .

Next, the function and effect of the sanitary product 1 of Example 1 will be described.

The sanitary product 1 of Example 1 has a first sheet 11 having a contact surface 10a that comes into contact with the wearer's skin S. The front sheet 10 faces the wearer when worn. Furthermore, the chemical liquid 40 for skin care is applied to the contact surface 10a of the first sheet 11. Furthermore, the first sheet 11 is formed of a nonwoven fabric including at least one of a first fiber containing a hydrophilic resin and a second fiber having a surface area-increasing structure on the fiber surface.

Here, the hydrophilic resin contained in the first fiber can form a water film on the fiber surface. Therefore, when the first sheet 11 contains the first fiber, the first sheet 11 can use the first fiber to form a film of moisture contained in the chemical solution 40 on the contact surface 10a, so that the chemical solution 40 can be fixed on the contact surface 10a. Side 10a. Thereby, the sanitary product 1 of Embodiment 1 can improve the skin care effect of the medicinal solution 40 and reduce the stress on the skin when wearing the sanitary product 1 .

Moreover, the second fiber has a surface area increasing structure on the fiber surface. Therefore, when the first sheet 11 includes the second fiber, the first sheet 11 can increase the amount of the chemical liquid 40 applied compared to a sheet made of fibers with smooth surfaces such as general synthetic fibers. area. Thereby, the first sheet 11 can increase the amount of chemical solution applied and increase the amount of chemical solution 40 fixed on the contact surface 10a. In addition, the chemical liquid 40 is easily entangled in the structure with an increased surface area. The second fiber is a smoother fiber surface than the fiber surface, and the chemical liquid 40 has a higher retention performance. As a result, the first sheet 11 including the second fiber can fix the chemical solution 40 on the contact surface 10a. Therefore, the sanitary product 1 of Embodiment 1 can also improve the skin care effect of the medicinal solution 40 when the first sheet 11 contains the second fiber.

Moreover, in the sanitary product 1 of Example 1, the single-filament fineness of the 1st fiber and the 2nd fiber contained in the 1st sheet 11 is set to 2 dtex or less. Therefore, the sanitary product 1 of Example 1 can increase the density of the fiber structure of the first sheet 11 . Thereby, the medical solution 40 cannot easily pass through the first sheet 11, and the sanitary product 1 can retain the medical solution 40 on the contact surface 10a.

Furthermore, in the sanitary product 1 of Example 1, the second sheet 12 is laminated on the non-contact surface 10b of the first sheet 11, and the front sheet 10 has a dual structure. Furthermore, the second sheet 12 is formed of a nonwoven fabric including at least one of a first fiber containing a hydrophilic resin and a second fiber having a surface area-increasing structure on the surface of the fiber. Thereby, the sanitary product 1 can inhibit the passage of the medical solution 40 through both the first sheet 11 and the second sheet 12, thereby improving the fixing performance of the medical solution 40 on the contact surface 10a.

In addition, in the sanitary product 1 of Example 1, the single fiber fineness of the first fiber and the second fiber contained in the second sheet 12 is also set to 2 dtex or less. Thereby, the sanitary product 1 of Embodiment 1 can also increase the density of the fiber structure of the second sheet 12, so that the medical solution 40 cannot easily pass through the second sheet 12. Therefore, the sanitary product 1 of Embodiment 1 can further improve the fixation performance of the chemical solution 40 on the contact surface 10a.

Furthermore, in the sanitary product 1 of Example 1, the first sheet 11 is pressed against the second sheet 12 by heat embossing processing. Here, in the pressing pattern 41 formed by the thermal embossing process, the front sheet 10 is melted and recessed on the contact surface 10a. Therefore, the chemical liquid 40 applied to the contact surface 10a is likely to accumulate inside the pressing pattern 41 (the depression of the contact surface 10a).

On the other hand, the pressing pattern 41 of Example 1 has a circular shape with a diameter r of 1 mm or more and 5 mm or less in plan view. Furthermore, the distance W between adjacent pressing patterns 41 is set to 5 mm or less. Therefore, the sanitary product 1 can form a large number of relatively fine pressing patterns 41 on the contact surface 10a. By accumulating a large amount of the medical solution 40 in the pressing pattern 41, the fixing performance of the medical solution 40 on the contact surface 10a can be improved.

Furthermore, the sanitary article 1 of Example 1 includes: a front sheet 10 that has the first sheet 11 and faces the wearer; and an absorbent member 20 that is disposed on the non-skin side of the front sheet 10 and absorbs the wearer's body fluids. Furthermore, the top sheet 10 is adhered to the absorbent member 20 via the adhesive 42 uniformly applied between the top sheet 10 and the absorbent member 20 .

Thereby, in the sanitary product 1, the adhesive 42 prevents the chemical solution 40 from passing through the front sheet 10, so that the chemical solution 40 can be fixed on the contact surface 10a. Therefore, the sanitary product 1 can improve the fixing performance of the chemical solution 40 of the front sheet 10 .

The sanitary product 1 of the present invention has been described above based on Embodiment 1. However, the specific structure is not limited to Embodiment 1, and design changes or additions are allowed as long as they do not deviate from the gist of the invention of each claim.

In the sanitary product 1 of Example 1, the pressing pattern 41 which presses the 1st sheet 11 to the 2nd sheet 12 is shown as a circular shape in a plan view. However, the shape of the pressing pattern 41 is not limited to a circular shape. For example, the pressing pattern 41 may have a rectangular shape in plan view, and the length of each side may be set to 1 mm or more and 5 mm or less. That is, the pressing pattern 41 may also be in a rectangular shape with the length of each side being 1 mm or more and 5 mm or less in plan view. In this situation, the sanitary product 1 can still improve the fixing performance of the medical solution 40 on the contact surface 10a by accumulating a large amount of the medical solution 40 in the pressing pattern 41.

Furthermore, in the sanitary product 1 , the pressing pattern 41 having a circular shape in plan view and the pressing pattern 41 having a rectangular shape may be mixed. In this case, by setting the diameter r or the length of each side to 1 mm or more and 5 mm or less, and setting the spacing W between adjacent pressing patterns 41 to 5 mm or less, it is possible to accumulate in the pressing patterns 41 A large amount of liquid medicine 40 improves the fixation performance of the liquid medicine 40.

In the sanitary product 1 of Example 1, there is shown an example in which the first sheet 11 constituting the front sheet 10 is pressed against the second sheet 12 by thermal embossing processing. However, the first sheet 11 may also be adhered to the second sheet 12 through an adhesive uniformly applied between the first sheet 11 and the second sheet 12 . In this case, the adhesive applied between the first sheet 11 and the second sheet 12 can inhibit the passage of the chemical solution 40 applied to the contact surface 10a, and can improve the stability of the chemical solution 40 on the front sheet 10. performance.

Furthermore, in the sanitary product 1 of Example 1, the front sheet 10 is an example of a double-layer structure composed of the first sheet 11 and the second sheet 12. However, the structure of the front sheet 10 is not limited to this. The front sheet 10 only needs to include the first sheet 11 having at least a contact surface 10a that comes into contact with the wearer's skin S, and may have a single-layer structure. Furthermore, the front sheet 10 may have a structure in which three or more layers of sheets are laminated on the second sheet 12 . That is, the second sheet 12 may not be provided, or may be a plurality of sheets.

Furthermore, an example is shown in which the sanitary article 1 of Example 1 is applied to a sanitary napkin (absorbent article) in which an absorbent member 20 capable of absorbing body fluids of the wearer is covered with a front sheet 10 . However, the sanitary product 1 may also be one without the absorbent member 20 like a mask.

In addition, in the sanitary product 1 of Example 1, there is shown an example in which the chemical solution 40 is evenly applied to substantially the entire surface of the contact surface 10 a that is in contact with the wearer's skin S. However, the chemical liquid 40 can be applied to any part of the contact surface 10a, and the amount of application liquid can also be different in local areas. Alternatively, a plurality of different types of chemical liquids 40 may be applied to the contact surface 10a. [Cross-reference of related applications]

This application claims priority based on Patent Application No. 2022-038219 filed with the Japan Patent Office on March 11, 2022, the entire disclosure of which is incorporated into this specification by reference.

1:Hygiene products 10: Front slice 10a: Contact surface 10b: Non-contact surface 11: 1st slice 12: 2nd slice 20:Absorbent member 30: Back sheet 30a: outer side 40:Medicinal liquid 41: Press pattern 42: Adhesive P:Underwear r: diameter S:Skin T: coating pattern W: interval

Figure 1 is a perspective view showing the sanitary product according to Embodiment 1. Fig. 2 is an explanatory diagram schematically showing a cross-section of the sanitary product according to Example 1. FIG. 3A is an explanatory diagram showing the first example of a fiber with a special-shaped cross section. FIG. 3B is an explanatory diagram showing a second example of a fiber with a special-shaped cross section. Figure 4 is an explanatory diagram showing an example of crimped fibers. Fig. 5 is an explanatory diagram showing an example of heat shrinkable fiber. Figure 6 is an explanatory diagram showing fiber surfaces of various fibers. FIG. 7 is a schematic diagram showing the embossing pattern of the heat embossing of the sanitary product of Example 1. FIG. 8 is a schematic diagram showing a first example of the coating pattern of the adhesive for sanitary products according to Example 1. FIG. 9 is a schematic diagram showing a second example of the coating pattern of the adhesive for sanitary products according to Example 1.

10: Front slice

10a: Contact surface

10b: Non-contact surface

11: 1st slice

12: 2nd slice

20:Absorbent member

30: Back sheet

30a: outer side

40:Medicinal liquid

42: Adhesive

P:underwear

S:Skin

Claims (9)

A sanitary product, which is characterized in that it is a sanitary product worn by the wearer and has: Sheet material, which has a contact surface with the skin of the above-mentioned wearer; The sheet includes at least one of a first fiber containing a hydrophilic resin and a second fiber having a surface area-increasing structure on the surface of the fiber, and a skin care liquid is coated on the contact surface. For example, the sanitary products in claim item 1, among which The single filament fineness of the above-mentioned first fiber and the above-mentioned second fiber is set to 2 dtex or less. If requesting sanitary products in item 1 or 2, where The above-mentioned sheet has a second sheet layered on the non-contact area located on the opposite side of the above-mentioned contact surface; and The second sheet includes at least one of the first fiber and the second fiber. For example, request for sanitary products in item 3, in which The above-mentioned sheet is pressed onto the above-mentioned second sheet through heat embossing processing; The embossed pattern of the above-mentioned hot embossing process has a circular shape with a diameter of not less than 1 mm and not more than 5 mm when viewed from above, or a rectangular shape with a length of each side of not less than 1 mm and not more than 5 mm when viewed from above; and The distance between adjacent pressing patterns is set to 5 mm or less. For example, request for sanitary products in item 3, in which The above-mentioned sheet is connected to the above-mentioned second sheet through an adhesive uniformly applied between the above-mentioned sheet and the above-mentioned second sheet. If the sanitary products required in Item 1 or 2 are: A front material having the sheet material and facing the wearer; and an absorbent member disposed on the non-skin side of the front material and absorbing the body fluids of the wearer; and The front material is adhered to the absorbent member via an adhesive uniformly applied between the front material and the absorbent member. For example, the sanitary products required in item 3 must have: A front material having the sheet material and facing the wearer; and an absorbent member disposed on the non-skin side of the front material and absorbing the body fluids of the wearer; and The front material is adhered to the absorbent member via an adhesive uniformly applied between the front material and the absorbent member. For example, the sanitary products required in item 4 must have: A front material having the sheet material and facing the wearer; and an absorbent member disposed on the non-skin side of the front material and absorbing the body fluids of the wearer; and The front material is adhered to the absorbent member via an adhesive uniformly applied between the front material and the absorbent member. If the sanitary products in item 5 are required, they must have: A front material having the sheet material and facing the wearer; and an absorbent member disposed on the non-skin side of the front material and absorbing the body fluids of the wearer; and The front material is adhered to the absorbent member via an adhesive uniformly applied between the front material and the absorbent member.