KR20240019443A - Disposable sanitary pads made of eco-friendly natural materials - Google Patents

Abstract

The present invention is a disposable absorbent product consisting of a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent pad positioned between the top sheet and the back sheet, wherein the top sheet is made of organic fiber non-woven fabric, and the back sheet is biodegradable. It relates to a disposable absorbent product composed of a synthetic resin, wherein the absorbent pad is composed of a natural absorbent material and natural absorbent pulp.
The disposable absorbent product of the present invention does not use synthetic fibers or chemical products, so it is beneficial to the wearer's physical health by preventing the wearer from experiencing menstrual eczema or itching, and also uses only eco-friendly natural materials, so it can be used for one-time use and remain natural even if discarded. It is an environmentally friendly product as it can be decomposed.

Description

Disposable sanitary pads made of eco-friendly natural materials}

The present invention is a disposable sanitary napkin made of eco-friendly natural materials. By using only environmentally friendly natural materials such as natural fibers and natural absorbents, the present invention prevents skin diseases of the wearer and reduces environmental pollution, while being equivalent to conventional disposable products. This relates to disposable sanitary napkins made of excellent eco-friendly natural materials that have a high level of secretion absorption effect.

In general, disposable absorbent products are products for absorbing human secretions, such as blood, urine, and menstrual blood. Specifically, the structure of a women's sanitary napkin, one of the disposable absorbent products, is shown in Figure 1, and a cross-sectional view along the line "A-A" of the women's sanitary napkin in Figure 1 is shown in Figure 2. As shown in Figures 1 and 2, a typical sanitary napkin consists of a liquid-permeable upper sheet 10 that contacts the skin and transmits secretions, and is made of the same size and shape as the upper sheet 10 and is fused to the upper sheet 10. A liquid-impermeable back sheet (20), an absorbent pad (30) that is inserted and fixed between the top sheet (10) and the back sheet (20) to absorb secretions such as menstrual blood that have passed through the top sheet (10), and an absorbent pad (30) ) and an adhesive portion 40 that is inserted and fixed at an appropriate position between the upper sheet 10 and is formed on the lower surface of the absorbent pad 30 and the back sheet 20 to secure the sanitary napkin through adhesion to the inner surface. Similar to the structure of the sanitary napkin, the disposable absorbent product also consists of a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent pad positioned between the top sheet and the back sheet. Disposable absorbent products with this structure are made of highly hygroscopic pulp (synthetic It is made of fiber) as the main raw material, and the lower sheet is made of liquid-impermeable pulp (synthetic fiber) as the main raw material to prevent absorbed secretions from leaking out. In particular, the absorbent pad of disposable absorbent products currently on the market is composed of a polymer absorber, a highly absorbent resin made from synthetic chemicals such as acrylic acid polymer or polyvinyl alcohol. Since the synthetic fibers and polymer absorbents used in these disposable absorbent products are processed with large amounts of bleach, they contain ingredients harmful to the human body. If they come into direct contact with the skin, they may cause skin problems such as itching, swelling, and soreness. , In particular, the female vagina has a tendency to strongly attract external substances, so there is a problem that harmful substances can be absorbed into the human body. In addition, due to the strong absorption power of the polymer absorbent, it can absorb not only secretions such as menstrual blood but also harmless moisture inside the vagina, causing vaginal dryness. However, despite these problems, today, due to convenience of use, a large amount of disposable absorbent products made of pulp containing ingredients harmful to the human body are used.

Accordingly, in order to solve the above problems, there have been attempts to develop disposable absorbent products that replace synthetic fibers with natural fibers. For example, Korea Registered Utility Model No. 20-0360794 discloses a cotton sanitary napkin with a replaceable absorbent body (absorbent pad), and Korea Registered Utility Model No. 20-0263520 discloses that the pad is an absorbent pad inside the sanitary napkin body. Disclosed is a sanitary napkin composed of an absorbent pad made of a cotton mat made by laminating several layers of thinly processed cotton rather than cotton. However, disposable absorbent products such as cotton sanitary pads have a problem in that their original purpose, which is to absorb and store secretions such as blood, urine, and menstrual blood secreted by the human body, is significantly lower than that of disposable absorbent products made of synthetic fibers, making them inconvenient to use. there is.

Accordingly, the present inventors made diligent efforts to develop a disposable absorbent product composed only of human-friendly materials while having an absorption and storage function equivalent to that of disposable absorbent products composed of synthetic fibers currently on the market, and as a result, the present invention was completed.

One object of the present invention is to provide a disposable absorbent product consisting of a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent pad positioned between the top sheet and the back sheet, wherein the top sheet is composed of an organic fiber non-woven fabric, A disposable absorbent product is provided, wherein the back sheet is made of biodegradable resin, and the absorbent pad is made of natural absorbent material and natural absorbent pulp.

The present invention is a disposable absorbent product consisting of a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent pad positioned between the top sheet and the back sheet, wherein the top sheet is made of an organic fiber non-woven fabric, and the back sheet is made of raw powder. It is composed of a dissolvable resin, and the absorbent pad relates to a disposable absorbent product characterized in that it is composed of natural absorbent pulp and natural absorbent material.

The disposable absorbent product of the present invention absorbs and stores human secretions, etc., and is not limited thereto, but examples thereof include diapers, sanitary napkins, tampons, and panty liners. In addition, the disposable absorbent product of the present invention is preferably used for one-time use, but if the amount of human secretions is small compared to the maximum absorption amount, it can be used more than once, so the number of uses is not limited to this. The liquid-permeable upper of the present invention The sheet is characterized by being composed of organic fiber non-woven fabric. The organic fiber non-woven fabric of the present invention refers to organic fiber extracted from plants produced without the use of toxic pesticides and chemical fertilizers, for example, organic cotton, and manufactured into non-woven fabric. A method of manufacturing fiber extracted from organic plants into a nonwoven fabric can preferably be manufactured using a spunlace process. The spunlace process is similar to the general non-woven fabric (air through) process, but in the initial mixed cotton process, the yarn is completely opened, the yarn is metered and supplied to the card machine, and the metering supply and carding process to form the web in the card machine are performed. The web created in the card machine goes through a forming process to adjust the thickness and width of the desired nonwoven fabric. Afterwards, in the water-jet process, water is sprayed upwards and downwards to join the web, and then it is transferred back to the conveyor and goes through a water punching process on the back side. The web that has undergone water punching goes through a high vacuum exhauster to remove as much moisture as possible from inside the web, and then goes through a drying process to create the final product. The organic fiber nonwoven fabric manufactured by the above process has a thickness of 0.5 mm or less.

[0008]

2

2

Specifically, it is 0.1 to 0.5 mm, and its basis weight is 20 to 50 g/m.

, preferably 30 to 45 g/m

, more preferably 35

2

am. The organic fiber nonwoven fabric prepared in this way is used to form the top sheet of a disposable absorbent product.

to 45g/m

1 to 4 sheets, preferably 1 to 3 sheets, and most preferably 1 to 2 sheets are fused to form one top sheet. The number of organic fiber nonwovens forming one top sheet may be selected within the above range depending on the purpose of the disposable absorbent product being used. However, if the organic fiber non-woven fabric is more than 5 sheets, the thickness of the formed upper sheet becomes thick and sufficient liquid permeability cannot be achieved, and the overall thickness of the disposable absorbent product becomes thick.

2

There is an uncomfortable problem when wearing it. In addition, it is preferable that the overall basis weight of the top sheet made of organic fiber non-woven fabric is less than 100 g/m. This is because if the basis weight is exceeded, a feeling of heterogeneity due to the weight occurs when worn.

this

The organic fiber non-woven fabric of the present invention constitutes the upper sheet of the disposable absorbent product, so even if it is in direct contact with the wearer's skin, it does not cause skin problems, which are problems with conventional synthetic fibers, and can be worn for a long time.

The absorbent pad of the present invention is characterized by being composed of a natural absorbent and natural absorbent pulp rather than a chemically manufactured polymer absorber.

The natural absorbent is, but is not limited to, starch derived from plants such as corn or potatoes, and serves to absorb human secretions and retain the absorbed secretions. The natural absorbent has a particle size distribution of 10 to 200 mesh, preferably 20 to 150 mesh, and more preferably 20 to 100 mesh. The natural absorber is 50 to

2

2

2

It is included in the absorbent pad at a content of . The content of natural absorbent is 50g/m

, preferably 50 to 95 g/m

less than

100g/m

2

In this case, the effectiveness of absorbing and storing secretions is low, so it is not suitable for disposable absorbent products, and when the content of natural absorbent is 100 g/m, the thickness of the absorbent pad becomes thick, which has the problem of poor appearance.

over

The natural absorbent pulp of the present invention is a particle aggregate of cellulose fibers or aggregates of these fibers manufactured according to a pulp manufacturing process in its natural state without the use of bleach from wood or other fiber plants used in wood pulp or non-wood pulp. It refers to powder that has been ground to size. The wood pulp includes coniferous or broad-leaved wood such as pine, fir, larch, poplar, birch, cottonwood, oak, mulberry, and ginkgo, and the non-wood pulp includes straw, soybean, reed, alder root, and bamboo. , including bagasse, etc.

The absorbent pad of the present invention composed of the natural absorbent and natural absorbent pulp can be manufactured by the following methods. After processing the natural absorbent pulp into the shape of an absorbent pad, a certain amount of the natural absorbent is applied to the processed natural absorbent pulp (first natural absorbent pulp) by spraying or spraying at regular intervals of 0.01 to 0.05 mm. After applying, another natural absorbent pulp (second natural absorbent pulp) is placed on top of the applied natural absorbent pad and pressed. The absorbent pad manufactured in this way has the same shape as in FIG. 3. Or, after pulverizing the natural absorbent pulp, the pulverized natural absorbent pulp and the natural absorbent are mixed at a weight ratio of 1.5 to 6:1, preferably 1.5 to 5:1, more preferably 2 to 5:1. It is manufactured by mixing it, pressing it into pulp, and then cutting it into the shape of an absorbent pad. The absorbent pad manufactured in this way has the same shape as in FIG. 4. The manufactured absorbent pad has a thickness of 2 to 6 mm, preferably 3 to 5 mm. If the thickness is less than 2 mm, there is a problem in that secretions are not sufficiently absorbed, and if the thickness is more than 6 mm, it is too thick. There is a problem with the appearance. The absorbent pad of the present invention is made of natural materials, so it is environmentally friendly and has good absorption speed, absorption ratio, and discharge rate, so it can be suitable for use as an absorbent pad for disposable absorbent products.

The liquid-impermeable back sheet of the present invention is characterized by being composed of a liquid-impermeable biodegradable resin. The liquid-impermeable biodegradable resin refers to synthetic resin synthesized using chemical methods or microorganisms or natural polymers such as starch, cellulose, and wood flour. Preferably, the biodegradable resin of the present invention is a fiber containing polylactic acid (PLA) obtained from corn or potatoes, Tencel, a regenerated cellulose, milk-impregnated rayon, and chitosan. In one specific implementation, the present inventors used polylactic acid, which is produced by a known method, for example, by fermenting renewable resources such as starch contained in corn or potatoes with microorganisms, followed by dehydration and condensation. Polylactic acid can be manufactured by the following manufacturing method or purchased and sold as polylactic acid.

The back sheet made of liquid-impermeable biodegradable resin of the present invention has no fear of discharge of absorbed secretions to the outside when worn, and since it is made of biodegradable resin, it can be used in an environmentally friendly manner because it naturally biodegrades when disposed of.

The disposable absorbent product of the present invention has an upper sheet in contact with the skin, an absorbent pad that absorbs and stores secretions, and a back sheet that prevents the absorbed and stored secretions from leaking to the outside, all of which are composed of materials derived from nature, but are currently available on the market. It has almost the same level of absorption and absorption storage rate as disposable absorbent products made from synthetic fibers, and because it is made of natural material, there is no risk of causing skin problems or diseases such as dryness when worn on the human body, so it can be safely worn for a long time. It is an environmentally friendly product.

The present invention is explained in more detail by the following examples. However, the present invention is not limited by the examples below and can be applied to other disposable absorbent products.

Example 1: Manufacturing of sanitary napkin 1-1. Manufacture of top sheet

2

The basis weight of 1kg of organic cotton fiber is 40g/m using the spunlace method.

Phosphorus organic fibrous non-woven fabric (fibrous non-woven fabric A) or

2

It is manufactured from phosphorus organic fibrous nonwoven fabric (fibrous nonwoven fabric B), and these manufactured fibrous nonwoven fabrics are cut into the shape of the top sheet.

20g/m

However, it was processed. Among these processed fibrous nonwoven fabrics, only fibrous nonwoven fabric A was used as a top sheet, or fibrous nonwoven fabric B was stacked in two layers and fused together to be used as a top sheet.

1-2. Manufacturing of absorbent pads

The absorbent pad is made by purchasing natural absorbent pulp made from coniferous trees on the market, pulverizing it, mixing it with corn starch in a turbulence machine at a weight ratio of 2:1, pressing it into pulp using a press, and cutting it into the shape of an absorbent pad. Processed.

1-3. sanitary napkin manufacturing

A sanitary napkin was manufactured using the top sheet and absorbent pad manufactured in 1-1 above, as well as PLA purchased from NPI Co., Ltd. as a back sheet, using a general sanitary napkin manufacturing process. The sanitary napkin made with the top sheet made of fibrous non-woven fabric A was called sanitary napkin-A, and the sanitary napkin made with the top sheet made of two layers of fibrous non-woven fabric B was called sanitary napkin-B, and the following experiment was performed.

Example 2: Sanitary napkin physical property test

The absorption rate, discharge amount, and absorption ratio of the sanitary napkin of the present invention prepared in Example 1 were measured, and the commercially available cotton sanitary napkins (Rohan) made of only cotton and regular sanitary napkins (P&G) made of synthetic fiber and polymer absorber were measured. Comparison was made. The comparative experiment was repeated 5 times, and the absorption rate experiment was tested according to the test method notified by the Food and Drug Administration. The results are shown in Table 1 below.

As can be seen in the above comparative experiment, the general sanitary napkin containing the polymer absorber was the best in terms of absorption speed and absorption ratio, followed by the sanitary napkin-B and sanitary napkin-A of the present invention, and the cotton sanitary napkin was the best. It was low. In addition, the rate of discharge of absorbed water was superior in that order: general sanitary napkins, sanitary napkins of the present invention-B, sanitary napkins-A, and cotton sanitary napkins. In particular, in terms of absorption ratio, the sanitary napkins-A and B of the present invention showed more than 10 times and passed the sanitary napkin standard notified by the Food and Drug Administration, while the cotton sanitary napkin had an absorption ratio of 9 times, which was below the standard. Therefore, the sanitary napkin of the present invention has an appropriate absorption rate and has good absorption speed and discharge rate even though it uses a natural absorbent, so it can be used as a disposable absorbent product.

Example 3: Sanitary napkin leak test

A leakage test was conducted by comparing the sanitary napkin manufactured in Example 1 with the cotton sanitary napkin and regular sanitary napkin in Example 2. As a result, sanitary napkin-A, sanitary napkin-B and general sanitary napkins of the present invention did not leak through the back sheet, but water leakage occurred in the case of cotton sanitary napkins. Therefore, it was found that the sanitary napkin of the present invention can be suitably used as a sanitary napkin.

Example 4: Sanitary napkin wearing evaluation test

The sanitary napkin-A prepared in Example 1 was evaluated after wearing it on 20 women in their 20s and 30s with skin problems such as itching and soreness. As a result, none of the 20 people had skin problems caused by sanitary pads, and all 20 people expressed satisfaction when wearing them.

The disposable absorbent product of the present invention can be used in diapers, sanitary napkins, tampons, and panty liners to absorb secretions discharged from the human body, such as blood, urine, and menstrual blood.

Claims (7)

A disposable absorbent product consisting of a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent pad positioned between the top sheet and the back sheet, wherein the top sheet is composed of 1 to 4 sheets of organic fiber nonwoven fabric, and the back sheet is A disposable sanitary napkin made of eco-friendly natural materials, which is composed of biodegradable resin, and the absorbent pad is composed of a natural absorbent and a natural absorbent pad. The disposable sanitary napkin according to claim 1, wherein the organic fiber nonwoven fabric is a nonwoven fabric obtained by processing fibers extracted from organic cotton through a spunlace process. 2
The product of claim 1, wherein the organic fiber nonwoven fabric is 20 to 50 g/m. Disposable absorbent characterized by having a basis weight of
The disposable sanitary napkin according to claim 1, wherein the biodegradable resin is any one from the group consisting of fibers containing PLA, regenerated cellulose, milk-impregnated rayon, and chitosan. The disposable sanitary napkin of claim 1, wherein the natural absorbent is corn starch or potato starch. 2
The absorbent product according to claim 1, wherein the natural absorbent is used in an amount of 50 to 100 g/m. One-time use characterized in that it is contained in an absorbent pad with a content of
The method of claim 1, wherein the natural absorbent pulp is manufactured from an eco-friendly natural material, characterized in that it is manufactured from wood pulp or non-wood pulp selected from the group consisting of straw, soybean, reed, algae root, bamboo, and bagasse. Disposable sanitary napkins.