JP2021062132A - Sanitary article using member derived from used sanitary article - Google Patents

Abstract

To provide a sanitary article which uses a member derived from a used sanitary article, can effectively use a resource and use a sustainable material.SOLUTION: A sanitary article 1 including a member derived from a used sanitary article comprises: a front surface sheet 3; an outer surface sheet 5; and an absorber 7 containing pulp fiber and high water-absorbing polymer. In the absorber, the pulp fiber or high water-absorbing polymer contains recycled pulp fiber or high water-absorbing recycled polymer as a member derived from a used sanitary article. The front surface sheet or outer surface sheet is a bio-derived sheet containing a bio-derived material. ΔYI when measuring from the bio-derived sheet toward the absorber is within a range between 0 to 9 with respect to the standard white board.SELECTED DRAWING: Figure 1

Description

The present invention relates to a sanitary product using a member derived from a used sanitary product.

In recent years, contributions to the Sustainable Development Goals (SDGs) have been sought, and in response, effective use of resources has been promoted. For example, there is known a technique for recycling pulp fibers, highly absorbent polymers, and the like from used sanitary goods (eg, disposable diapers, incontinence pads, sanitary napkins, absorbent articles such as panty liners). As such a technique, for example, Patent Document 1 discloses a method for regenerating a highly water-absorbent polymer, a method for producing a highly water-absorbent recycled polymer, and the use of an alkali metal ion source. This method regenerates (manufactures) pulp fibers and highly water-absorbent recycled polymers derived from used sanitary products as recycled pulp fibers and highly water-absorbent recycled polymers, respectively.

Japanese Unexamined Patent Publication No. 2019-1350446

In Patent Document 1, when the material is recovered from the used sanitary goods, the pulp fiber and the highly water-absorbent polymer are separated from other materials and can be reused as the recycled pulp fiber and the highly water-absorbent recycled polymer of the sanitary goods. However, other non-specific materials are not always easy to reuse as materials for hygiene products because various materials are crushed and separated from other materials in a mixed state. Therefore, as the non-woven fabric and film used for the front surface sheet and outer surface sheet (including the back surface sheet) of sanitary products, the separated material is not reused, but from petroleum-derived materials such as synthetic resin. Newly formed materials may be used. However, petroleum-derived materials such as synthetic resins are not always sustainable materials because petroleum regeneration is virtually impossible. Therefore, there is room for improvement in the provision of hygiene products that can contribute to sustainable development goals.

An object of the present invention is to provide a sanitary product using a member derived from a used sanitary product, which can effectively utilize resources and use sustainable materials.

The present invention is a sanitary product comprising a member derived from a used sanitary product, comprising a surface sheet, an outer surface sheet, and an absorber containing pulp fibers and a highly water-absorbent polymer, wherein the absorber is the pulp. The fiber or the highly water-absorbent polymer contains recycled pulp fiber or a highly water-absorbent recycled polymer as a member derived from the used sanitary goods, and the surface sheet or the outer surface sheet is a bio-derived sheet containing a bio-derived material. , A sanitary product in which ΔYI measured from the bio-derived sheet toward the absorber is in the range of 0 to 9 with respect to a standard white plate.

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide a hygiene product using a member derived from a used hygiene product, which can effectively utilize resources and can use sustainable materials.

It is a top view of the structural example of the hygiene product which concerns on 1st Embodiment. It is a top view of the structural example of the hygiene product which concerns on 2nd Embodiment. It is a top view of the example of the hygiene product which concerns on 3rd Embodiment.

The present embodiment relates to the following aspects.
[Aspect 1]
A sanitary product comprising a member derived from a used sanitary product, comprising a surface sheet, an outer surface sheet, and an absorber containing a pulp fiber and a highly water-absorbent polymer, wherein the absorber is the pulp fiber or the high. The water-absorbent polymer contains recycled pulp fiber or highly water-absorbent recycled polymer as a member derived from the used sanitary goods, and the surface sheet or the outer surface sheet is a bio-derived sheet containing a bio-derived material, and the bio-derived material. A sanitary product in which ΔYI measured from the sheet toward the absorber is in the range of 0 to 9 with respect to a standard white plate.
In this sanitary product, the pulp fiber or the highly water-absorbent polymer contains the recycled pulp fiber or the highly water-absorbent recycled polymer derived from the used sanitary product, and the surface sheet or the outer surface sheet is a bio-derived sheet. In this way, by using recycled materials derived from used sanitary products for pulp fibers and highly water-absorbent polymers, resources can be effectively used, and by using bio-derived sheets for the surface sheet and outer surface sheet, it is sustainable. Materials can be used.
At that time, ΔYI measured from the bio-derived sheet toward the absorber is very small, and therefore the whiteness is very high. Therefore, when the sanitary product is in a used state, the unused hygiene product is used. It is possible to make it easier to distinguish from. As a result, it is possible to prevent unused sanitary goods from being accidentally discarded, and it is possible to contribute to the effective use of resources. In addition, since the whiteness is very high, it can enhance the hygienic impression, so it is possible to suppress the psychological resistance caused by the product being recycled from used hygiene products, and to increase the sense of security. Can be done. As a result, the purchase of hygiene products is promoted, and it is possible to contribute to the effective use of resources.
They can provide hygiene products that can contribute to sustainable development goals.

[Aspect 2]
When the pulp fiber contains the recycled pulp fiber, the ratio of the recycled pulp fiber to the pulp fiber is 20 to 100% by mass, and when the highly water-absorbent polymer contains the highly water-absorbent recycled polymer, the high amount. The sanitary product according to aspect 1, wherein the ratio of the highly water-absorbent recycled polymer to the water-absorbent polymer is 20 to 100% by mass.
In this sanitary product, the ratio of recycled pulp fiber to pulp fiber is 20 to 100% by mass, and the ratio of highly water-absorbent recycled polymer to high water-absorbent polymer is 20 to 100% by mass. As described above, resources can be used more effectively by using a high ratio of recycled materials derived from used sanitary products for pulp fibers and highly water-absorbent polymers.

[Aspect 3]
The hygiene product is composed of a plurality of members including the pulp fiber, the highly water-absorbent polymer, the surface sheet and the outer surface sheet, and the plurality of members include a plurality of elastic members and an adhesive. The hygiene product according to aspect 1 or 2, wherein the plurality of members excluding the plurality of elastic members and the adhesive are all made of a bio-derived material.
In this hygiene product, a plurality of members excluding a plurality of elastic members and an adhesive are composed of a bio-derived material. Therefore, more sustainable materials can be used. In addition, it is possible to give the user a sense of security due to the fact that it is composed of a bio-derived material, and it is possible to further suppress the psychological resistance due to being a recycled product from used hygiene products.

[Aspect 4]
The sanitary product according to aspect 3, wherein the ratio of the portion obtained by removing the plurality of elastic members and the adhesive from the plurality of members to the plurality of members is 50 to 100% by mass.
In this hygiene product, the ratio of the portion composed of the bio-derived material to the member constituting the hygiene product is 50 to 100% by mass. In this way, by using a high proportion of members composed of bio-derived materials in hygiene products, more sustainable materials can be used. In addition, it is possible to give the user a sense of security due to the fact that it is composed of a bio-derived material, and it is possible to further suppress the psychological resistance due to being a recycled product from used hygiene products.

[Aspect 5]
The hygiene product according to any one of aspects 1 to 4, wherein at least one of the surface sheet, the outer surface sheet and the absorber has a bio-derived fragrance.
In this hygiene product, the front sheet, back sheet or absorber has a bio-derived fragrance, so that more sustainable materials can be used. In addition, it is possible to give the user a sense of security due to the bio-derived fragrance, and it is possible to further suppress the psychological resistance caused by the recycled product from the used hygiene product.

[Aspect 6]
The hygiene product according to any one of aspects 1 to 5, wherein the surface sheet contains a plurality of fibers, and the plurality of fibers contain bio-derived fibers.
In this hygiene product, the fibers of the surface sheet contain bio-derived fibers, so more sustainable materials can be used. In addition, it is possible to give the user a sense of security due to the fact that it is composed of a bio-derived material, and it is possible to further suppress the psychological resistance due to being a recycled product from used hygiene products.

[Aspect 7]
The item according to any one of aspects 1 to 6, wherein the bio-derived sheet has a plurality of protrusions or recesses protruding from one of the skin-side surface and the non-skin-side surface toward the other. Hygiene products.
In this hygiene product, by using a bio-derived sheet having an uneven shape on the surface sheet and the outer surface sheet, not only a sustainable material can be used more, but also the tactile sensation and the absorption of body fluid can be improved. As a result, it is possible to give the user a sense of security by improving the tactile sensation and performance of the hygiene product, and it is possible to further suppress the psychological resistance caused by the recycled product from the used hygiene product.

[Aspect 8]
When the pulp fiber contains the recycled pulp fiber, the recycled pulp fiber has antibacterial property, and when the highly water-absorbent polymer contains the highly water-absorbent recycled polymer, the highly water-absorbent recycled polymer has antibacterial property. , The sanitary product according to any one of aspects 1 to 7.
In this hygiene product, recycled pulp fiber and highly water-absorbent recycled polymer have antibacterial properties, so it is possible to give the user a sense of security due to the antibacterial properties of the sanitary products, and from used hygiene products. It is possible to further suppress the psychological resistance caused by being a recycled product.

[Aspect 9]
The absorption performance of the hygiene product is higher than the absorption performance of the hygiene product of the same size and mass without using the material derived from the used hygiene product and / or using the material derived from the biotechnology, aspects 1 to 8. Hygiene products listed in any one of the items.
By making the absorption performance of this hygiene product, that is, the hygiene product using the material derived from the used hygiene product and / or the bio-derived material higher than the absorption performance of the conventional hygiene product not using those materials, the user. It is possible to give a sense of security that body fluids are unlikely to leak, and it is possible to further suppress the psychological resistance caused by being a recycled product from used hygiene products.

Hereinafter, sanitary products including members derived from used sanitary products according to the embodiment will be described with reference to the drawings. However, examples of hygienic products include absorbent articles, and examples of absorbent articles include disposable diapers, urine absorbing pads, and sanitary napkins. Examples of excrement include urine, feces, and menstrual blood. A used hygiene product is a hygiene product that is used by the user and absorbs and retains the user's excrement. However, it may include those that have been used but do not absorb and retain excrement, and those that have not been used but have been discarded.

(First Embodiment)
FIG. 1 is a plan view showing a configuration example of a sanitary product according to the first embodiment. In this embodiment, a disposable diaper will be described as an example of a hygienic product. This disposable diaper is a tape-type diaper 1. The tape-type diaper 1 has a longitudinal direction L, a width direction W, and a thickness direction T that are orthogonal to each other in the state shown in FIG. In the longitudinal direction L, the side of the tape-type diaper 1 corresponding to the wearer's abdomen toward the edge (ventral edge) is also referred to as the front side of the longitudinal direction L, and the tape-type diaper 1 corresponding to the wearer's back. The side toward the edge (dorsal edge) is also referred to as the rear side in the longitudinal direction L. Further, "planar view" means viewing the tape-type diaper 1 in a state of being unfolded in a plane including the longitudinal direction L and the width direction W from the upper side in the thickness direction T, and "planar shape" means a plan view. The shape to be grasped. The "planar direction" is an arbitrary direction parallel to the plane including the width direction W and the longitudinal direction L. The "skin side" and "non-skin side" mean the side relatively close to the wearer's skin surface and the side far from the wearer's skin surface in the thickness direction T when the tape-type diaper 1 is worn by the wearer, respectively. To do. These definitions are commonly used not only for the tape-type diaper 1, but also for each material arranged in the tape-type diaper 1, the pants-type diaper 1, the urine collecting pad 1, and each of these materials, which will be described later.

In the present embodiment, the tape-type diaper 1 is divided into three regions in the longitudinal direction L: a ventral region FW, a dorsal region RW, and a crotch region C between the ventral region FW and the dorsal region RW. Will be done. Here, the ventral region FW is a region of about 1/4 of the tape-type diaper 1 from the ventral edge in the longitudinal direction L toward the dorsal side, and the dorsal region RW is the dorsal side in the longitudinal direction L. The area is about 1/4 of that of the tape-type diaper 1 from the edge of the diaper to the ventral side. Therefore, the crotch region C is a region of about 1/2 of the tape-type diaper 1 between the ventral region FW and the dorsal region RW.

As shown in FIG. 1, the tape-type diaper 1 includes a front surface sheet 3, a back surface sheet 5, and an absorber 7 between the front surface sheet 3 and the back surface sheet 5. Examples of the surface sheet 3 include a liquid-permeable non-woven fabric, a resin film having liquid-permeable holes formed therein, and a combination of the same type or different types thereof. Examples of the back sheet 5 include a liquid-impermeable non-woven fabric, a resin film, and a combination thereof of the same type or different types. In the present embodiment, the absorber 7 includes an absorber core that absorbs and retains the liquid and a core wrap that includes the absorber core. The absorbent core contains at least one of a highly water-absorbent polymer and a pulp fiber, and the core wrap includes, for example, a hydrophilic non-woven fabric. The absorber 7 and the front surface sheet 3 and the back surface sheet 5 are bonded by an adhesive, respectively, and the front surface sheet 3 and the back surface sheet 5 are bonded by an adhesive at their peripheral edges. In another embodiment, a cover sheet (not shown) is laminated on the non-skin side of the back sheet 5. In another embodiment, the back surface sheet 5 is omitted, and the non-skin side surface of the absorber 7 and the non-skin side surface of the peripheral portion of the front surface sheet 3 are joined to the cover sheet. Examples of the cover sheet include a liquid-impermeable non-woven fabric, a resin film, and a combination thereof of the same type or different types. Further, in another embodiment, in the width direction W, the surface sheet 3 is approximately the width of the absorber 7 in a plan view, and a pair of side sheets extending outward are provided at both ends of the surface sheet 3. Are joined. Examples of the side sheet include hydrophobic or hydrophilic non-woven fabrics. In another embodiment, a diffusion sheet (or a second sheet) is arranged between the surface sheet 3 and the absorber 7. Examples of the diffusion sheet include hydrophilic non-woven fabrics.

In the present embodiment, as shown in FIG. 1, the tape-type diaper 1 has a pair of leak-proof walls 101 and 101 including an elastic member 103, a fixing region 105 for fixing the leak-proof wall 101 to the surface sheet 3, and legs. A pair of elastic members 107 and 107 around the portion and a pair of tape fasteners 109 and 109 and the like are further provided. The pair of leakage-proof walls 101, 101 are arranged on the surface sheet 3 on both sides of the absorber 7 in the width direction W in a plan view along the longitudinal direction L. Examples of the leak-proof wall 101 include hydrophobic or hydrophilic non-woven fabrics. The elastic member 103 is arranged inside the leak-proof wall 101 in the width direction W along the longitudinal direction L. Examples of the elastic member 103 include thread rubber. The fixed region 105 is formed by adhesive or crimping on the inside of the leak-proof wall 101 in the width direction W and at both ends in the longitudinal direction L. Examples of the elastic member 107 include thread rubber. The pair of tape fasteners 109, 109 are arranged at both end edges of the back surface sheet 5 (or cover sheet (not shown)) in the dorsal region RW in the width direction W, and extend outward. Examples of the tape fastener 109 include a laminated body of an elastic body such as flat rubber and a hook member of a hook-and-loop fastener. When a pair of side sheets are joined to the surface sheet 3, the inner portion of the side sheet in the width direction W may form the leak-proof wall 101.

The absorber 7 contains at least one of recycled pulp fibers derived from used sanitary goods (eg, used disposable diapers) and highly absorbent recycled polymers. When the highly water-absorbent recycled polymer contains a highly water-absorbent recycled polymer, the ratio of the highly water-absorbent recycled polymer to the highly water-absorbent polymer is, for example, 20 to 100% by mass, preferably 50 to 100% by mass, and more preferably 75. ~ 100% by mass. This is from the perspective of effective use of resources. When the pulp fiber contains recycled pulp fiber, the ratio of the recycled pulp fiber to the pulp fiber is, for example, 20 to 100% by mass, preferably 50 to 100% by mass, and more preferably 75 to 100% by mass. This is from the perspective of effective use of resources. The recycled pulp fiber and the highly water-absorbent recycled polymer are not particularly limited, and examples thereof include the recycled pulp fiber and the highly water-absorbent recycled polymer described in Patent Document 1 (Japanese Unexamined Patent Publication No. 2019-135044). The polymer is a polymer because the state of internal cross-linking differs between the highly water-absorbent recycled polymer (water-absorbed and dehydrated at least once) and the virgin highly water-absorbent polymer (water-absorbed and dehydrated at least once). It is possible to distinguish by measuring the soluble content of. For example, the soluble content of a virgin highly water-absorbent polymer generally used for hygiene products is 10% by mass or less, whereas the soluble content of the highly water-absorbent recycled polymer of Patent Document 1 is about 15% by mass. It gets higher. However, the method for measuring the soluble component is the water-soluble component (Ext) specified in ERT (EDANA Recommeded Test Method) 470.2-02. Recycled pulp fibers are relatively easy to whiten and can be distinguished. For example, the recycled pulp fiber of Patent Document 1 has a small ΔYI (in other words, a low lignin content), that is, it has a high whiteness and can be distinguished.

In the present embodiment, a part of the non-woven fabric or the resin film in each material used for the tape-type diaper 1 (example: front surface sheet 3, diffusion sheet, side sheet, back sheet 5, cover sheet, core wrap, leakage-proof wall 101, etc.). Or all are made of bio-derived materials. For example, in a non-woven fabric, a part or all of the fibers constituting the non-woven fabric are formed of fibers made of a bio-derived material. In the resin film, a part or all of the resin constituting the resin film is formed of a bio-derived material. In the present embodiment, the ratio of the bio-derived material to the sheet such as the non-woven fabric or the resin film containing the bio-derived material is, for example, 20 to 100% by mass, preferably 50 to 100% by mass, and more preferably 75. ~ 100% by mass. From the perspective of sustainable material use. However, a part or all of the non-recycled pulp fiber portion of the pulp fiber may be formed from a bio-derived material. Furthermore, some or all of the non-high water-absorbent recycled polymers of the high water-absorbent polymer may be formed from a bio-derived material.

However, "bio-derived" materials (eg, fibers, resins, sheets, non-woven fabrics) are renewable materials and include pulp fibers formed of natural polymers. "Renewable material" means a material produced from renewable resources. "Renewable resource" refers to a resource that is naturally or naturally produced at a rate comparable to its consumption rate (eg, within 100 years). This resource can be subsidized by agricultural technology. Examples of renewable resources include plants (eg sugar cane, sugar beet, corn, potatoes, citrus fruits, tree plants, lignocellulose, hemicellulose, cellulose waste), animals, bacteria and the like. Natural resources such as crude oil, coal, and natural gas, which take more than 100 years to form, are not considered renewable resources. The proportion of organic carbon in "bio-derived" materials is specified by the method of ISO 16620 or ASTM D6866. In other words, by that method, the ratio of the "bio-derived" portion in the member and whether or not the member is "bio-derived" can be specified. However, the ratio of organic carbon in the "bio-derived" material is the bio-based (bio-derived) carbon content to the total carbon content (TC) or total organic carbon content (TOC) in the "bio-derived" material. is there.

In other words, among the plurality of members constituting the tape-type diaper 1, a plurality of elastic members such as elastic members 103 and 107 and members (example: front surface sheet 3, absorber 7 and back surface sheet 5) are adhered to each other. The remaining member, excluding the adhesive, preferably contains at least one of bio-derived materials, recycled pulp fibers and highly water-absorbent recycled polymers. The ratio (mass) of the members containing the bio-derived material, recycled pulp fiber and highly water-absorbent recycled polymer to the plurality of members constituting the tape-type diaper 1 is preferably 50 to 100% by mass, preferably 70 to 100% by mass. % Is more preferable, and 90 to 100% by mass is more preferable. More sustainable materials can be used and resources can be used more effectively. Among the plurality of members constituting the tape-type diaper 1, the remaining members excluding the elastic member and the adhesive include, for example, a front surface sheet 3, a diffusion sheet, a side sheet, a back surface sheet 5, a cover sheet, a core wrap, and a leakage proof. Examples include wall 101, pulp fibers, highly absorbent polymers, tape fasteners. It is preferable that at least 50% or more, preferably 70% or more of these members contain at least one of bio-derived materials, recycled pulp fibers and highly water-absorbent recycled polymers.

When the pulp fiber or non-woven fabric is formed of fibers made of bio-derived material, the fibers made of bio-derived material include, for example, natural cellulose fiber, biomass-derived polyolefin fiber or polylactic acid fiber, and biodegradable. Fiber is mentioned. Examples of natural cellulose fibers include plant fibers, for example, pulp fibers (example: wood pulp, non-wood pulp), seed hair fibers (example: cotton), skin fibers (example: hemp), leaf vein fibers (example: Manila hemp), and the like. Fruit fiber (example: palm) can be mentioned. Examples of wood pulp include softwood bleached kraft pulp (NBKP), broadleaf bleached kraft pulp (also referred to as LBKP), and used paper pulp.

When the resin film is formed from a bio-derived material, the bio-derived material may include, for example, natural cellulose, biomass-derived polyolefin, polylactic acid and polylactic acid-based polymers (PLA), biodegradable polymers, and the like. Can be mentioned.
When the highly water-absorbent polymer is formed from a bio-derived material, the bio-derived material is a three-dimensional product formed by polymerizing and cross-linking a bio-derived glacial acrylic acid, an acrylic acid derivative, or a mixture thereof. Examples thereof include crosslinked polyacrylic acid-based highly water-absorbent polymers. The details are disclosed in, for example, Japanese Patent Application Laid-Open No. 2019-135306.

For example, as an example of the spunbonded non-woven fabric, bio-based PE: 20 to 30% by mass (use example: non-woven fabric for leg gather) can be mentioned. Further, as an example of the air-through non-woven fabric, bio-based PE: 20 to 30% by mass (use example: surface sheet) can be mentioned. As an example of the air-through non-woven fabric, bio-based PE: 10 to 20% by mass (use example: back sheet non-woven fabric) can be mentioned.

As a preferred embodiment of the present embodiment, a non-woven fabric made of fibers made of a bio-derived material, for example, a surface sheet 3, has a plurality of protrusions protruding from one of the skin-side surface and the non-skin-side surface toward the other. It has a portion or a plurality of recesses that are recessed. For example, the surface sheet 3 extends along the longitudinal direction L, is located between a plurality of convex portions arranged at intervals in the width direction W, and adjacent convex portions among the plurality of convex portions, and is located in the longitudinal direction. It is provided with a plurality of recesses extending along L.

As a preferred embodiment of the present embodiment, the tape-type diaper 1 may be provided with a fragrance at any place. Examples of the location include the non-skin side surface of the surface sheet 3 and the skin side surface of the skin side core wrap of the absorber 7 between the surface sheet 3 and the absorber 7. Alternatively, for example, the surface of the pulp fiber in the absorber 7 and the surface of the highly water-absorbent polymer can be mentioned. Alternatively, for example, between the back sheet 5 and the absorber 7, the skin-side surface of the back sheet 5, the non-skin-side surface of the non-skin-side core wrap of the absorber 7, and the like can be mentioned. Alternatively, for example, the non-skin side surface of the back sheet 5 can be mentioned.

Examples of the fragrance include known naturally derived fragrances, for example, fragrances containing extracts from plants. Specific examples thereof include naturally occurring fragrant substances collected from raw materials by separation operations such as extraction, concentration, oil extraction, and distillation. Those produced from plants are called vegetable flavors, and examples thereof include rose, jasmine, peppermint, sage, eucalyptus, lemongrass, cinnamon, ginger, orange, and lime. In addition, those collected from animals are called animal fragrances, and examples thereof include musk, civet, castorium, and ambergris.

As a preferred embodiment of the present embodiment, the tape-type diaper 1 may be provided with a bio-derived antibacterial agent at any place. Examples of the location include the non-skin side surface of the surface sheet 3 and the skin side surface of the skin side core wrap of the absorber 7 between the surface sheet 3 and the absorber 7. Alternatively, for example, the surface of the pulp fiber in the absorber 7 and the surface of the highly water-absorbent polymer can be mentioned. Alternatively, for example, between the back sheet 5 and the absorber 7, the skin-side surface of the back sheet 5, the non-skin-side surface of the non-skin-side core wrap of the absorber 7, and the like can be mentioned.

Examples of the antibacterial agent include known cationic antibacterial agents. Examples of the cationic antibacterial agent include a quaternary ammonium salt (example: alkyltrimethylammonium salt, polyoxyethylene alkylmethylammonium salt), a guanidine antibacterial agent (example: chlorhexidine gluconate, chlorhexidine hydrochloride), and a biguanide antibacterial agent. (Example: polyaminopropyl biguanide hydrochloride, polyhexamethylene biguanide stearate), metal ion carrier, (example: metal salt such as silver nitrate or copper sulfate that can release metal ions such as silver ion or copper ion) , Hexetidine, metallonidazole and the like. The cationic antibacterial agent is arranged, for example, by applying an aqueous solution containing the cationic antibacterial agent to a predetermined place.

As a preferred embodiment of the present embodiment, in the tape-type diaper 1, the front surface sheet 3 or the outer surface sheet (the most non-skin side sheet, which is the back surface sheet 5 or the back sheet 5) formed of a bio-derived sheet (example: non-woven fabric, resin film). The whiteness ΔYI measured from the cover sheet) toward the absorber 7 is, for example, in the range of 0 to 9 with respect to the standard white plate. The whiteness ΔYI is preferably in the range of 0 to 7.0, and more preferably in the range of 0 to 5.5. As a result, when the user sees the tape-type diaper 1, the whiteness is high, so that the user has a psychological resistance to the absorber containing the recycled pulp fiber produced from the pulp fiber of the used sanitary goods. Hateful.

The ΔYI of the sheet (surface sheet 3 or outer surface sheet) on the absorber can be measured as follows.
(1) A color difference meter CR-300 manufactured by Konica Minolta Sensing Co., Ltd. is prepared in a constant temperature and humidity chamber having a temperature of 20 ± 5 ° C. and a humidity of 65 ± 5% RH.
(2) The tape-type diaper is left in a constant temperature and humidity chamber at 20 ± 5 ° C. and humidity: 65 ± 5% RH for 60 minutes.
(3) Place the measuring head of the color difference meter on the absorber and sheet of the tape-type diaper, and for each sample, ΔYI (= | [sheet on the absorber), which is the color difference (absolute value) of the YI value from the standard white plate. YI value]-[YI value of standard white plate] |) is measured.
(4) The average value of ΔYI of 10 samples is adopted.

In the sanitary products of the present embodiment, the pulp fiber or the highly water-absorbent polymer contains the recycled pulp fiber or the highly water-absorbent recycled polymer derived from the used sanitary goods, and the front surface sheet 3 or the outer surface sheet (back surface sheet 5 or the back surface sheet 5 or). The cover sheet) is a bio-derived sheet. In this way, by using recycled materials derived from used sanitary products for pulp fibers and highly water-absorbent polymers, resources can be effectively used, and the front surface sheet 3 and the outer surface sheet (back surface sheet 5 or cover sheet) are bio-derived. Sustainable materials can be used by using sheets.
At that time, ΔYI measured from the bio-derived sheet toward the absorber 7 is in the range of 0 to 9 with respect to the standard white plate, which is very small, and therefore the whiteness is very high, so that this sanitary product is used. When it is in a finished state, it can be made easier to distinguish it from the unused hygiene products. As a result, it is possible to prevent unused sanitary goods from being accidentally discarded, and it is possible to contribute to the effective use of resources. In addition, since the whiteness is very high, it can enhance the hygienic impression, so it is possible to suppress the psychological resistance caused by the product being recycled from used hygiene products, and to increase the sense of security. Can be done. As a result, the purchase of hygiene products is promoted, and it is possible to contribute to the effective use of resources.
They can provide hygiene products that can contribute to sustainable development goals.

In the sanitary product of the preferred embodiment of the present embodiment, the ratio of the recycled pulp fiber to the pulp fiber is 20 to 100% by mass, preferably 50 to 100% by mass, and more preferably 80 to 100% by mass. In the case of 80 to 100% by mass, it can be said that the whole pulp fiber is substantially recycled pulp fiber. The ratio of the highly water-absorbent recycled polymer to the highly water-absorbent polymer is 20 to 100% by mass, preferably 50 to 100% by mass, and more preferably 80 to 100% by mass. In the case of 80 to 100% by mass, it can be said that the entire highly water-absorbent polymer is substantially a highly water-absorbent recycled polymer. As described above, resources can be used more effectively by using a high ratio of recycled materials derived from used sanitary products for pulp fibers and highly water-absorbent polymers.

In the hygienic product of the preferred embodiment of the present embodiment, the plurality of elastic members 103, 107 and the members excluding the adhesive contain at least one of bio-derived materials, recycled pulp fibers and highly water-absorbent recycled polymers. I'm out. Therefore, sustainable materials can be used more and resources can be used more effectively. In addition, it is possible to give the user a sense of security due to the fact that it is composed of bio-derived materials, and it is possible to further suppress the psychological resistance due to being a recycled product from used hygiene products. ..

In the sanitary product of the preferred embodiment of the present embodiment, the ratio of the member containing the bio-derived material, the recycled pulp fiber and the highly water-absorbent recycled polymer to the member constituting the sanitary product is 50 to 100% by mass. In this way, by using a high proportion of members containing bio-derived materials, recycled pulp fibers and highly water-absorbent recycled polymers in hygiene products, sustainable materials can be used more and resources can be used more effectively. In addition, it is possible to give the user a sense of security due to the fact that it is composed of bio-derived materials, and it is possible to further suppress the psychological resistance due to being a recycled product from used hygiene products. ..

In the hygiene product of the preferred embodiment of the present embodiment, since the front surface sheet 3, the back surface sheet 5 or the absorber 7 has a bio-derived fragrance, a sustainable material can be used more. In addition, it is possible to give the user a sense of security due to the bio-derived fragrance, and it is possible to further suppress the psychological resistance caused by the product being recycled from used hygiene products.

In the hygiene product of the preferred embodiment of the present embodiment, since the fibers of the surface sheet 3 contain bio-derived fibers, more sustainable materials can be used. In addition, it is possible to give the user a sense of security due to the fact that it is composed of bio-derived fibers, and it is possible to further suppress the psychological resistance due to being a recycled product from used hygiene products. ..

In the hygiene product of the preferred embodiment of the present embodiment, by using a bio-derived sheet having an uneven shape on the outer surface sheet such as the front surface sheet 3, the back surface sheet 5, or the cover sheet, not only sustainable materials can be used more, but also sustainable materials can be used more. It can improve the tactile sensation and the absorption of body fluids. As a result, it is possible to give the user a sense of security by improving the tactile sensation and performance of the hygiene product, and it is possible to further suppress the psychological resistance caused by the product being recycled from the used hygiene product.

In the sanitary products of the preferred embodiment of the present embodiment, since the recycled pulp fiber and the highly water-absorbent recycled polymer have antibacterial properties, it is possible to give the user a sense of security due to the antibacterial properties of the sanitary products. It is possible to further suppress the psychological resistance caused by the product being recycled from used hygiene products.

In a preferred embodiment of the present embodiment, the absorption performance of hygiene products, that is, hygiene products using materials derived from used hygiene products and / or bio-derived materials, is absorbed in the same size and the same basis weight without using these materials. It is higher than the absorption performance of conventional hygiene products that have a body. However, the same size of the two absorbers means that the sizes of the longitudinal direction L, the width direction W and the thickness direction T match each other within ± about 5%, or the volume is within ± about 15%. It means that they match with. Further, the same basis weight means that the basis weights match within ± about 15%. Here, the recycled pulp fiber has a lower ash content than the virgin pulp fiber. Therefore, when recycled pulp fiber and virgin pulp fiber are used in the same volume and the same basis weight in the absorber, the amount of pulp fiber is larger in the case of using the recycled pulp fiber than in the case of using the virgin pulp fiber. Become. That is, the absorption performance is improved. As a result, it is possible to give the user a sense of security that the body fluid is unlikely to leak, and it is possible to further suppress the psychological resistance caused by the product being recycled from used hygiene products.
In addition, when improving the absorption performance with a non-woven fabric containing fibers using bio-derived materials, the fiber diameter, basis weight, fiber density, etc. of the fibers can be adjusted to improve liquid permeability, liquid absorption, liquid retention, and wetness. Absorption performance of bags etc. can be improved. In addition, when improving the absorption performance with a highly water-absorbent polymer using a bio-derived material, the degree of cross-linking is adjusted and the surface is treated during the production of the highly water-absorbent polymer, and multiple types of highly water-absorbent polymers are used. Absorption performance can be improved by mixing. These methods have the potential to complicate the manufacturing process, increase the workload, and increase the cost, but the improvement in absorption performance brought about by these methods makes it difficult for the user to leak body fluids. It gives a sense of security and can further suppress the psychological resistance caused by being a recycled product.

(Second Embodiment)
FIG. 2 is a plan view showing a configuration example of the sanitary product according to the second embodiment. In this embodiment, the differences from the first embodiment will be mainly described. In this embodiment, a disposable diaper will be described as an example of a hygienic product. This disposable diaper is a pants-type diaper 1, and FIG. 2 shows a state in which the pants-type diaper 1 is deployed. Members and parts having the same function use the same names and symbols.

The pants-type diaper 1 includes a cover sheet 15 constituting a ventral region (ventral waist belt) FW, a dorsal region (dorsal waist belt) RW, and a crotch region C, and an absorbent main body 10. One end of the absorbent body 10 in the longitudinal direction L is laminated on the skin-side surface of the ventral region FW, and the other end is laminated on the skin-side surface of the dorsal region RW. The crotch region C supports the absorbent body 10 from the non-skin side. Both ends FWa and FWa in the width direction W of the ventral region FW and both ends RWa and RWa in the width direction W of the dorsal region RW overlap each other in the thickness direction T and are joined along the longitudinal direction L. As a result, the pants-type diaper 1 is formed. In this case, in the pants-type diaper 1, the waist opening through which the wearer's waist passes is formed by the outer end FWe in the longitudinal direction L in the ventral region FW and the outer end RWe in the longitudinal direction L in the dorsal region RW. It is defined. Further, in the pants-type diaper 1, a pair of leg openings through which the wearer's legs pass are defined by side portions Ce and Ce on both sides in the width direction W in the crotch region C. It can be said that the ventral region FW and the dorsal region RW are defined in the range of the longitudinal direction L where both end portions FWa and FWa and both end portions RWa and RWa are joined.

The cover sheet 15 is composed of, for example, two layers of sheets, and a plurality of elastic members 111a, 111b; 113a, 113b; 107 are arranged between the two layers of sheets. The plurality of elastic members 111a and 111b are located in the ventral region FW. The plurality of elastic members 111a are arranged inside the ventral region FW in the longitudinal direction L and on both sides in the width direction W with the absorbent body 10 interposed therebetween. On the other hand, the plurality of elastic members 111b are arranged outside the longitudinal direction L in the ventral region FW. Similarly, the plurality of elastic members 113a and 113b are located in the dorsal region RW. The plurality of elastic members 113a are arranged inside the dorsal region RW in the longitudinal direction L and on both sides in the width direction W with the absorbent body 10 interposed therebetween. On the other hand, the plurality of elastic members 113b are arranged outside the longitudinal direction L in the dorsal region RW. The plurality of elastic members 107 are arranged on both sides in the width direction W in the region from the ventral region FW to the dorsal region RW. The plurality of elastic members 111a, 111b; 113a, 113b; 107 are exemplified by the rubber thread.

In the present embodiment, the absorbent body 10 includes a front surface sheet 3, a back surface sheet 5, and an absorber 7 located between the front surface sheet 3 and the back surface sheet 5. The absorbent body 10 includes a pair of side sheets 12, 12 located on both sides in the width direction W and extending in the longitudinal direction L on the surface on the skin side. Each side sheet 12 has a leak-proof wall 101 and fixed areas 105, 105. The fixing regions 105 and 105 are located at the front and rear ends of the side sheet 12 in the longitudinal direction L, and fix the leak-proof wall 101 to the skin-side surface of the absorbent body 10. The leak-proof wall 101 is located between the fixed regions 105 and 105 on the front side and the rear side in the longitudinal direction L of the side sheet 12, and fixes the outer edge in the width direction W to the skin-side surface of the absorbent body 10. And the inner edge in the width direction W is not fixed. In this case, the leak-proof wall 101 and the fixing regions 105 and 105 are formed, for example, in the inner portion of the side sheet 12 in the width direction W, and the outer portion of the side sheet 12 in the width direction W is fixed to the absorbent body 10. To. Each leak-proof wall 101 includes an elastic member 103 extending along the longitudinal direction L at the inner end in the width direction W. The elastic member 103 is exemplified by a rubber thread.

The cover sheet 15 and the pair of side sheets 12 and 12 are each made of the non-woven fabric or resin film according to the first embodiment. Therefore, it is preferable that the cover sheet 15 and a part or all of the pair of side sheets 12, 12 are made of a sheet containing a bio-derived material.

The other configurations and materials of each member are the same as those in the first embodiment. For example, the absorber 7 contains recycled pulp fiber or highly water-absorbent recycled polymer as a member derived from used sanitary goods, and the front surface sheet 3 or the outer surface sheet (cover sheet or back surface sheet 5) contains the pulp fiber or the highly water-absorbent polymer. Is a bio-derived sheet containing a bio-derived material, and the whiteness measured from the bio-derived sheet toward the absorber 7 is in the range of 0 to 9 with respect to the standard white plate.

Also in this case, the same effect as that of the first embodiment can be obtained. For example, in this sanitary product, resources can be effectively used by using recycled materials derived from used sanitary products for pulp fibers and highly water-absorbent polymers, and bio-derived sheets can be used for the surface sheet and outer surface sheet. , Sustainable materials can be used. In addition, at that time, since the whiteness when measured from the bio-derived sheet toward the absorber is very high, it is possible to prevent unused sanitary goods from being accidentally discarded, which contributes to the effective use of resources. be able to. In addition, since the whiteness is very high, a hygienic impression can be enhanced, so that it is possible to suppress the psychological resistance caused by the product being recycled from used hygiene products. As a result, the purchase of hygiene products is promoted, and it is possible to contribute to the effective use of resources. They can provide hygiene products that can contribute to sustainable development goals.

(Third Embodiment)
FIG. 3 is a plan view showing a configuration example of the sanitary product according to the third embodiment. In this embodiment, the differences from the first embodiment will be mainly described. In the present embodiment, the urine collecting pad 1 will be described as an example of the hygienic product. FIG. 3 shows a state in which the urine collecting pad 1 is deployed. Members and parts having the same function use the same names and symbols.

The urine absorbing pad 1 of the present embodiment includes an absorbent main body 10 arranged in pants (not shown) for the urine absorbing pad 1.
In the present embodiment, the absorbent body 10 includes a front surface sheet 3, a back surface sheet 5, and an absorber 7 located between the front surface sheet 3 and the back surface sheet 5. The absorbent body 10 includes a pair of side sheets 12, 12 located on both sides in the width direction W and extending in the longitudinal direction L on the surface on the skin side. Each side sheet 12 has a leak-proof wall 101 and fixed areas 105, 105. The fixing regions 105 and 105 are located at the front and rear ends of the side sheet 12 in the longitudinal direction L, and fix the leak-proof wall 101 to the skin-side surface of the absorbent body 10. The leak-proof wall 101 is located between the fixed regions 105 and 105 on the front side and the rear side in the longitudinal direction L of the side sheet 12, and fixes the outer edge in the width direction W to the skin-side surface of the absorbent body 10. And the inner edge in the width direction W is not fixed. In this case, the leak-proof wall 101 and the fixing regions 105 and 105 are formed, for example, in the inner portion of the side sheet 12 in the width direction W, and the outer portion of the side sheet 12 in the width direction W is fixed to the absorbent body 10. To. Each leak-proof wall 101 includes an elastic member 103 extending along the longitudinal direction L at the inner end in the width direction W. The elastic member 103 is exemplified by a rubber thread. The absorbent body 10 has a ventral region FW, a crotch region C and a dorsal region RW in the longitudinal direction L. In this case, both end edges of the crotch region C in the longitudinal direction L are set to positions where the absorbent main body 10 of the ventral region FW and the dorsal region RW begins to be constricted in the width direction W. The ratio of the longitudinal lengths of the ventral region FW, the crotch region C and the dorsal region RW can be varied depending on the age and gender of the wearer, and examples thereof include 25 to 35:30 to 40:35 to 45. ..

The pair of side sheets 12 and 12 are each made of the non-woven fabric or resin film according to the first embodiment. Therefore, it is preferable that a part or all of the pair of side sheets 12, 12 is composed of a sheet containing a bio-derived material.

The other configurations and materials of each member are the same as those in the first embodiment. For example, the absorber 7 contains recycled pulp fiber or highly water-absorbent recycled polymer as a member derived from used sanitary goods, and the front surface sheet 3 or the outer surface sheet (cover sheet or back surface sheet 5) contains the pulp fiber or the highly water-absorbent polymer. Is a bio-derived sheet containing a bio-derived material, and the whiteness measured from the bio-derived sheet toward the absorber 7 is in the range of 0 to 9 with respect to the standard white plate.

Also in this case, the same effect as that of the first embodiment can be obtained. For example, in this sanitary product, resources can be effectively used by using recycled materials derived from used sanitary products for pulp fibers and highly water-absorbent polymers, and bio-derived sheets can be used for the surface sheet and outer surface sheet. , Sustainable materials can be used. In addition, at that time, since the whiteness when measured from the bio-derived sheet toward the absorber is very high, it is possible to prevent unused sanitary goods from being accidentally discarded, which contributes to the effective use of resources. be able to. In addition, since the whiteness is very high, a hygienic impression can be enhanced, so that it is possible to suppress the psychological resistance caused by the product being recycled from used hygiene products. As a result, the purchase of hygiene products is promoted, and it is possible to contribute to the effective use of resources. They can provide hygiene products that can contribute to sustainable development goals.

The absorbent article of the present invention is not limited to the above-described embodiments, and can be appropriately combined or modified as long as it does not deviate from the object and purpose of the present invention.

1 Hygiene products 3 Front sheet 5 Back sheet 7 Absorber

Claims (9)

A hygiene product comprising a member derived from a used hygiene product, comprising a surface sheet, an outer surface sheet, and an absorber containing pulp fibers and a highly water-absorbent polymer.
The absorber comprises recycled pulp fiber or highly water-absorbent recycled polymer from which the pulp fiber or the highly water-absorbent polymer is a member derived from the used sanitary goods.
The surface sheet or the outer surface sheet is a bio-derived sheet containing a bio-derived material.
ΔYI measured from the bio-derived sheet toward the absorber is in the range of 0 to 9 with respect to the standard white plate.
Hygiene products. When the pulp fiber contains the recycled pulp fiber, the ratio of the recycled pulp fiber to the pulp fiber is 20 to 100% by mass.
When the highly water-absorbent recycled polymer contains the highly water-absorbent recycled polymer, the ratio of the highly water-absorbent recycled polymer to the highly water-absorbent recycled polymer is 20 to 100% by mass.
The hygiene product according to claim 1. The hygiene product is composed of a plurality of members including the pulp fiber, the highly water-absorbent polymer, the surface sheet and the outer surface sheet.
The plurality of members include a plurality of elastic members and an adhesive.
The members obtained by removing the plurality of elastic members and the adhesive from the plurality of members include at least one of bio-derived materials, recycled pulp fibers and highly water-absorbent recycled polymers.
The hygiene product according to claim 1 or 2. The ratio of the member containing the bio-derived material, the recycled pulp fiber and the highly water-absorbent recycled polymer to the plurality of members is 50 to 100% by mass.
The hygiene product according to claim 3. At least one of the surface sheet, the outer surface sheet and the absorber has a bio-derived fragrance.
The hygiene product according to any one of claims 1 to 4. The surface sheet contains a plurality of fibers, and the plurality of fibers include bio-derived fibers.
The hygiene product according to any one of claims 1 to 5. The bio-derived sheet has a plurality of protrusions or recesses protruding from one of the skin-side surface and the non-skin-side surface toward the other.
The hygiene product according to any one of claims 1 to 6. When the pulp fiber contains the recycled pulp fiber, the recycled pulp fiber has antibacterial properties and has antibacterial properties.
When the highly water-absorbent recycled polymer contains the highly water-absorbent recycled polymer, the highly water-absorbent recycled polymer has antibacterial properties.
The hygiene product according to any one of claims 1 to 7. The absorption performance of the hygiene product is higher than the absorption performance of the hygiene product having the same size and the same basis weight, which does not use the material derived from the used hygiene product and / or does not use the material derived from the bio product. ,
The hygiene product according to any one of claims 1 to 8.

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