KR20240056144A - Hygienic material - Google Patents

Abstract

In the present invention, a packaging cover; backsheet; absorbent layer; and a sanitary napkin in which a top sheet is sequentially laminated, wherein the back sheet and the top sheet are formed of a non-woven fabric using biodegradable polymer fibers.

Description

Sanitary Napkin {HYGIENIC MATERIAL}

The present invention relates to a sanitary napkin and a packaging cover applied thereto. More specifically, all layers constituting the sanitary napkin are made of eco-friendly materials, and the packaging cover applied thereto has wings whose length can be adjusted according to the needs of the wearer. It's about sanitary pads with wealth.

Various patent documents regarding materials and shapes applied to sanitary napkins and packaging covers (or back sheets) used therein are disclosed.

Regarding materials, recently, fabrics and non-wovens using natural fibers have been attempted as materials for sanitary napkins or packaging covers. For example, natural fiber non-woven fabrics manufactured from kenyaf (KR10-2191449B1), seaweed-derived fiber (WO2019-093700 A1), mulberry fiber (KR10-2404079 B1), PLA (KR10-1925577B1), etc. are disclosed. there is.

Regarding shape, a typical packaging cover is one with wings (or flaps). For example, EP1332745B1 discloses a disposable sanitary napkin with foldable wings (flaps), and KR10-1477300B1 discloses an absorbent product having convex width extensions and longitudinal extensions formed on the main body and wings. . JP5647824B2 discloses an absorbent article with a structure that can prevent wrinkles in wing-shaped flaps. Meanwhile, KR20-2010-0001127U discloses a sanitary napkin with wings made in a butterfly shape to reduce discomfort when worn.

However, there is no known packaging cover or sanitary napkin structure in which all layers of the sanitary napkin are made of eco-friendly materials, and furthermore, despite the various shapes described above, the extension length of the wings can be adjusted as needed.

The purpose of the present invention is to provide a packaging cover in which all layers of a sanitary napkin are made of eco-friendly materials and the length of which extends from the main body can be adjusted according to the user's needs, and a sanitary napkin using the same.

In order to achieve the above-described object, the present invention includes a packaging cover; backsheet; absorbent layer; and a sanitary napkin in which a top sheet is sequentially laminated, wherein the back sheet and the top sheet are formed of a non-woven fabric using biodegradable polymer fibers.

Preferably, the biodegradable polymer is polylactic acid.

The top sheet is preferably an antibacterially treated polylactic acid nonwoven fabric.

The packaging cover may be made of mulberry pulp material. Preferably, it may be water-proofed mulberry pulp.

The packaging cover may include a body portion and a pair of wings, and an insertion groove may be formed in the body portion to accommodate the wing portion, and a capsule-type adhesive may be provided inside the insertion groove.

The capsule adhesive may be a liquid adhesive filled in a capsule formed of a gelatin-based film.

The liquid adhesive may be a polyvinyl alcohol (PVA) adhesive.

The present invention further provides a packaging cover for a sanitary napkin, which includes a body portion and a pair of wings, wherein an insertion groove is formed in the body portion to accommodate the wing portion, and a capsule-type adhesive is provided inside the insertion groove. .

The sanitary napkin according to the present invention is environmentally friendly because all layers are made of material derived from lead. In addition, the packaging cover constituting the sanitary napkin according to the present invention is composed of separate wings and a main body, and is completed by adjusting the length of the wings extending from the main body and then adhering them with a capsule type adhesive to meet the needs of the user. Depending on the situation, the length of the wings can be adjusted.

Figure 1 is a schematic diagram explaining the layered structure of a sanitary napkin according to the present invention.
Figure 2 is a schematic diagram of a packaging cover according to the present invention ((a) is a top view, (b) is a side view)

Hereinafter, a sanitary napkin according to the present invention will be described with reference to the accompanying drawings.

Figure 1 is a schematic diagram explaining the layered structure of a sanitary napkin according to the present invention. The sanitary napkin 100 of the present invention, described with reference to Figure 1,

packaging cover (10);

A back sheet 20 formed on the packaging cover;

An absorption layer 30 formed on the backsheet; and

It includes a top sheet 40 formed on the antibacterial filter.

In the sanitary napkin 100 of the present invention, the packaging cover 10 is furthest from the skin surface of the sanitary napkin wearer and comes into contact with the wearer's underwear, such as panties. The packaging cover 10 may be the same size as the other layers overlying it or may have a large surface to accommodate them.

The packaging cover 10 prevents excrement absorbed by the sanitary napkin from leaking to the outside and wetting products in contact with the sanitary napkin, such as underwear such as panties and pajamas. Therefore, the packaging cover 10 must be impermeable to liquid (eg, menstrual blood and/or urine).

In an embodiment of the present invention, the packaging cover 10 may be a sheet made from natural fibers such as paper or Korean paper.

More preferably, the packaging cover 10 is a sheet (eg, Korean paper) made of mulberry pulp. Mulberry pulp is a natural fiber material derived from plants, and has a dense structure, so it has excellent liquid impermeability. It has the advantage of being environmentally friendly compared to composite materials such as conventional synthetic fabrics or nonwovens, polymer films such as thermoplastic films of polyethylene or polypropylene, or film-coated nonwovens.

In a preferred embodiment of the present invention, the mulberry pulp may be waterproofed to further ensure liquid impermeability. Waterproofing materials and methods for additional waterproofing of mulberry pulp are well known in the art.

The packaging cover 10 may be designed in a special form to ensure liquid impermeability and allow the wearer to adjust its size as needed.

Figure 2 is a schematic diagram of a packaging cover according to the present invention ((a) is a top view, (b) is a side view). Referring to Figure 2, the packaging cover 10 according to the present invention is composed of a main body 12 and a pair of wings 16 extending from the ends of the main body 12.

The main body portion 12 prevents excrement absorbed by the sanitary napkin from leaking to the outside and wetting products that come in contact with the sanitary napkin, such as underwear such as panties and pajamas, and accommodates other layers constituting the sanitary napkin stacked on top of it. ..

The wings 16 extend from the main body 12 to prevent liquid from leaking to the side of the main body 12.

In the packaging cover 10 according to the present invention, an insertion groove 14 is formed inside the main body 12. The insertion groove 14 may be formed by, for example, cutting the main body 12 from the side to form the insertion groove 14, or by overlapping the main body 12 in two layers. In the drawing, the insertion groove 14 is formed to a certain depth in the transverse direction (direction perpendicular to the longitudinal direction) of the main body 12, but the insertion groove 14 is formed by penetrating the main body 12 in the transverse direction. It can be.

The wing portion 16 is accommodated inside the insertion groove 14. The length (l) of the wing portion 16 stored in the insertion groove 14 is variable. The depth d at which the wing portion 16 is stored in the insertion groove 14 is also variable. In the drawing, the depth at which it is stored shows that it is stored in a part of the insertion groove 14, but it can be stored at a depth depending on the user's intention. Accordingly, the length of the stored wing portion 14 extending from the main body portion 12 is variable and can be made longer or shorter depending on the user's intention.

Adjusting the length that the stored wing portion 16 extends from the main body portion 12 is, for example, a condition in which one side of the wing portion 16 having a corrugated shape is previously fixed to one end of the main body portion 12. This is possible by pulling the other side of the wrinkled wing portion 16 immediately before using the sanitary napkin.

A capsule type adhesive 18 is applied to the insertion groove 14 of the main body 12. The capsule-type adhesive 18 typically contains an adhesive as an active ingredient in a polymer capsule or microcapsule, and can be used as one known in the art.

Preferably, a liquid adhesive is used filled in a capsule formed of a gelatin-based film. The capsule adhesive 18 functions as an adhesive by causing the capsule to burst or leak the liquid adhesive out of the capsule when pressure is applied. Preferably, a polyvinyl alcohol (PVA) adhesive is used as a liquid adhesive applied to the capsule adhesive 18. The polyvinyl alcohol-based adhesive is water-soluble and non-toxic, so it is particularly suitable for use in disposable products such as sanitary napkins that can come into direct contact with the human body.

Capsules or microcapsules for use in the present invention may be prepared by any of a number of known encapsulation methods. Examples of suitable methods include chemical encapsulation methods and mechanical encapsulation methods.

The wing portion 16 is stored inside the insertion groove 14 and the storage depth is adjusted, and then pressure is applied to the capsule-type adhesive 18 to burst the capsule, thereby forming the main body portion 12 and the wing portion ( 16) The length is fixed for each other.

The sanitary napkin packaging cover 10 according to the present invention has the advantage that the length of the wings and the length of the wings extending from the main body 12 are variable depending on the user's intention. In other words, a user who wants a long extension can use the packaging cover of the long extension by applying pressure to the capsule adhesive while extending the wings 16 out of the main body 12, and vice versa. .

The backsheet 20 constituting the sanitary napkin 100 of the present invention is a layer added to assist the waterproof function of the packaging cover 10. The backsheet 20 for this purpose is typically made of waterproof non-woven fabric. Preferably, the nonwoven fabric can be manufactured using biodegradable resin. The biodegradable resin includes polylactic acid (PLA), poly glycolic acid (PGA), poly caprolactone (PCL), aliphatic polyester resin, and poly hydroxy butyric acid. acid, PHB), D-3-hydroxy butyric acid, Polybutylene Succinate (PBS), Polybutylene Succinate-[0036] It may include at least one of co-adipate (PBSA), polybutylene succinate fumaric (PBSF), etc.

Most preferably, the nonwoven fabric is made of polylactic acid (PLA) alone or by copolymerization of PLA with other monomers. The production of PLA nonwovens is already widely known. For example, techniques disclosed in numerous documents such as KR10-1981965B1, KR10-2200291B1, and KR10-1221211B1 can be applied to the backsheet 20 of the present invention.

Nonwoven fabrics can be manufactured through any of the known nonwoven fabric manufacturing methods using the raw materials described above. For example, the nonwoven fabric may be manufactured using a spun bond method. Nonwoven fabrics manufactured using the spunbond method have the advantage of generating less fluff during processing than nonwoven fabrics manufactured using other methods.

Waterproofing of polylactic acid fibers or nonwoven fabrics is, for example, treating the surface of the nonwoven fabric with a fluorine-based or urethane-based water repellent to secure waterproofing and water-repellent performance, and this is well known in the art.

The absorbent layer 30 may be any absorbent means capable of absorbing or containing liquid (eg, menstrual blood and/or urine). Absorbent layer 30 can be made from a wide range of liquid absorbent materials commonly used in cotton filters or other absorbent products such as sanitary napkins and ground wood pulp, commonly referred to as airfelt. Examples of other absorbent materials include creped cellulose wadding, meltblown polymers including coforms, chemically strengthened, modified or crosslinked cellulose fibers, synthetic fibers such as crimped polyester fibers, peat moss, tissue wraps and tissue laminates. Tissue, absorbent foam, absorbent sponge, superabsorbent polymer, absorbent gelling material or any equivalent material or combination of materials or mixtures of the foregoing materials comprising.

In a preferred embodiment of the sanitary napkin 100 of the present invention, the absorbent layer 30 is a cotton filter formed of cotton fiber. The advantage of cotton filters is that they not only have good absorbency but are also harmless to the human body because they are natural fibers. The cotton filter may be made of cotton alone or, for example, wood pulp and crepe fabric. The shape of the absorbent layer 30 may be of a wide range of sizes and shapes (eg, rectangular, egg-shaped, dumbbell-shaped, etc.).

Lastly, the top sheet 40 is a liquid-permeable layer that allows liquid (e.g., menstrual blood and/or urine) to easily pass through and is in contact with the wearer's skin. Therefore, it must be docile, have a soft touch, and not irritate the wearer's skin.

In an embodiment of the present invention, a suitable top sheet 40 is a non-woven fabric using natural fibers.

In a preferred embodiment of the present invention, the top sheet 40 may be a non-woven fabric manufactured using a biodegradable resin. The biodegradable polymer fiber nonwoven fabric applied to the top sheet 40 is the same as described for the back sheet 20.

In a more preferred embodiment of the topsheet 40, a PLA antibacterial filter is used. The antibacterial filter has an absorption function and also functions to sterilize harmful bacteria contained in the liquid absorbed by the sanitary napkin, which will be described later.

The PLA antibacterial filter may be a known one. For example, a fabric made by spraying Hydroxylon, which decomposes cell walls, in particle form on a polylactic acid nonwoven fabric can be used.

Another example of a natural fiber non-woven fabric applied to the top sheet 40 is a non-woven fabric manufactured using Tencel fiber. Tencel fiber is a plant fiber, an eco-friendly fiber made from eucalyptus tree extract, and is a form of rayon. It has excellent moisture content and absorbency, and the fiber structure is smooth so it does not irritate the skin, so it can be used even on delicate skin. It is a biodegradable, eco-friendly fiber that biodegrades more than 90% over 30 days by microorganisms when left in the soil environment.

In the sanitary napkin 100 of the present invention, the packaging cover 10, back sheet 20, absorbent layer 30, and top sheet 40 are attached to the absorbent core by attachment means (not shown) as are well known in the art. are combined. For example, they may be held together or in part by a uniform continuous adhesive layer, a patterned adhesive layer, or an arrangement of separating lines, spirals or dots of the adhesive.

In the above, the present invention has been described in detail only with respect to the described embodiments, but it is clear to those skilled in the art that various changes and modifications are possible within the scope of the present invention, and it is natural that such changes and modifications fall within the scope of the appended patent claims.

100: Sanitary napkin
10: Packaging cover
12: main body
14.: Insertion groove
16: wing part
18: Capsule adhesive
20: back seat
30: absorption layer
40: Top sheet

Claims (14)

packaging cover; backsheet; absorbent layer; and a sanitary napkin in which top sheets are sequentially laminated,
A sanitary napkin, wherein the backsheet and topsheet are made of non-woven fabric using biodegradable polymer fibers.
According to paragraph 1,
The biodegradable polymers include polylactic acid (PLA), polyglycolic acid (PGA), polycaprolactone (PCL), aliphatic polyester resin, and polyhydroxybutyric acid. acid, PHB), D-3-hydroxy butyric acid, Polybutylene Succinate (PBS), Polybutylene Succinate-[0036] A sanitary napkin, characterized in that it contains at least one of co-adipate (PBSA), polybutylene succinate fumaric (PBSF), etc.
According to paragraph 2,
A sanitary napkin, characterized in that the biodegradable polymer is polylactic acid.
According to paragraph 1,
A sanitary napkin, characterized in that the top sheet is a polylactic acid fiber non-woven fabric.
According to paragraph 4,
A sanitary napkin, characterized in that the polylactic acid fiber nonwoven fabric is antibacterially treated.
According to paragraph 1,
A sanitary napkin, characterized in that the top sheet is a Tencel fiber non-woven fabric.
According to paragraph 1,
Sanitary napkin, characterized in that the packaging cover is mulberry pulp.
In clause 7,
A sanitary napkin, characterized in that the mulberry pulp is waterproofed.
According to paragraph 1,
The packaging cover is,
Includes a body portion and a pair of wings,
A sanitary napkin in which an insertion groove is formed in the body portion to accommodate the wing portion, and a capsule-type adhesive is provided inside the insertion groove.
According to clause 9,
The capsule-type adhesive is a sanitary napkin, characterized in that a liquid-type adhesive is filled in a capsule formed of a gelatin-based film.
According to clause 9,
A sanitary napkin, characterized in that the liquid adhesive is a polyvinyl alcohol (PVA) adhesive.
In the packaging cover for sanitary napkins including a body portion and a pair of wings,
A packaging cover in which an insertion groove is formed in the body portion to accommodate the wing portion, and a capsule-type adhesive is provided inside the insertion groove.
According to clause 12,
The capsule adhesive is a packaging cover, characterized in that the liquid adhesive is filled in a capsule formed of a gelatin-based film.
According to clause 12,
A packaging cover, characterized in that the liquid adhesive is a polyvinyl alcohol (PVA) adhesive.