KR20010064584A - Disposable diaper - Google Patents

Abstract

PURPOSE: Provided is a disposable diaper including a perforated film placed between a liquid permeable top sheet and an absorption body, which helps urine to spread well in the absorption body and prevents the urine from being run out from the absorption body. CONSTITUTION: The diaper comprises a liquid permeable top sheet, a liquid impermeable rear sheet, an absorption body(5), fasteners(15,16) and a perforated film(21) fixed between the top sheet and the absorption body to be placed at the central part of the absorption body. The perforated film has variously shaped holes of 1-20mm size, wherein the holes are symmetrically formed over 10-40% of the whole area of the film.

Description

Disposable diaper

The present invention relates to a disposable diaper, and more particularly, to a disposable absorbent product having an excellent effect of improving the spreadability of urine in the absorbent and preventing urine from falling out of the absorbent.

A general disposable absorbent product is a product that absorbs body fluids excreted by various physiological actions, that is, a product that absorbs urine, feces, menstrual discharge and vaginal discharge. More specifically, disposable diapers used by infants or incontinence ( disposable diapers, sanitary napkins and panty liners.

In the present invention, it is preferable to apply to disposable diapers among disposable absorbent products. Disposable diapers consist of a liquid permeable top sheet that is in direct contact with the wearer's skin when worn, and a liquid impermeable back sheet and a liquid permeable top sheet and a liquid impermeable back sheet that form an outer surface when worn. It consists of an absorbent core (absorbent core) and the fastening means located between.

Among the components of these disposable diapers, liquid permeable topsheets are made of synthetic nonwovens or apertured films to allow body fluids to quickly pass through the absorbent body.

Synthetic nonwoven fabrics are usually used by hydrophilic treatment of hydrophobic fibers in order to quickly transfer the body fluid absorbed by the absorber.

In addition, the absorber is typically composed of fluff pulp, superabsorbent polymer, tissue, etc., and absorbs the body fluid through the liquid permeable top sheet at a high speed and absorbs the absorbed body fluid. It performs the function of absorbing and retaining body fluids in order to prevent contact with the skin again.

The liquid impervious back sheet prevents body fluids absorbed by disposable diapers from leaking under the absorbent to contaminate the wearer's clothing or the surrounding environment.It mainly uses polyethylene film and adheres nonwoven fabric to the polyethylene film. It also improves the softness of the material.

And it includes a fastening means consisting of a re-adhesive fastening means and a front fastening means to maintain the disposable diaper so configured to the body.

In addition, each material is adhesively fixed by hot melt adhesive, thermal fusion or ultrasonic bonding.

The technical level of disposable absorbent products, including disposable baby diapers, incontinent diapers, and women's sanitary napkins, prevents leakage in terms of the rate and amount of absorption of bodily fluids released by physiological action. The basic performance of the user can be adjusted to some extent so as not to inconvenience the user.

However, one of the differentiating features that improves the fit is to make the product thinner, and to make such ultra-thin disposable diapers an easy way to use a large amount of fluffy pulp that takes up a lot of volume and use a super absorbent polymer. .

Therefore, due to the mixing ratio between the fluffy pulp and the high absorbent resin in the absorbent of the ultra-thin disposable diaper, the absorption rate of the product during use is lowered and the body fluid urine absorbed by the absorbent concentrates on the part of the absorbent. do.

The present invention is to solve the above problems, the approach of the present invention is to improve the spread of urine urinated in the absorbent of the ultra-thin diaper to be absorbed evenly by the absorbent. When urinated urine is absorbed widely and evenly by the absorbent, the usability of the absorbent is improved, and the amount of bleeding from the absorbent is also reduced relatively to prevent baby skin sores.

In the present invention, by inserting and fixing the perforated film on the absorbent part of the urine transmitted from the liquid permeable top sheet is delivered to the absorber through the hole of the perforated film, and part is diffused and transferred to the other part of the absorber through the perforated film to the absorber Concentration on one part can be prevented from being absorbed.

In the present invention, a film formed by forming holes of the same size or a film formed by mixing holes of different sizes, or one part of the film forming holes having the same size, and the other parts forming the same holes of different sizes. The film is inserted and fixed between the liquid permeable top sheet and the absorbent body to provide a disposable diaper having excellent urination spreadability.

In addition, the perforated film has a width and length of the absorber smaller than the same size or the size of the absorber, and the width and length is smaller than the width of the absorber, and the length is longer than that inserted between the liquid permeable top sheet and the absorber is fixed. The present invention is to provide a disposable diaper.

1 is a plan view of the present invention.

FIG. 2 is a partial cross-sectional view of FIG. 1 taken along line A-A. FIG.

3 is a partial cross-sectional view taken along the line B-B in FIG. 1;

Figure 4 is a plan view of the perforated film of the present invention.

<Description of the symbols for the main parts of the drawings>

1: front waist, 2: crotch,

3: back waist, 4: liquid impermeable backsheet,

5: absorbent, 6: liquid permeable topsheet,

7: nga band, 9: tissue,

10: legband, 11: waistband,

12: downy pulp, 13: super absorbent polymer,

14: the corresponding band end, 15: the front fastening means,

16: reattachment fastening means, 17: coagulation band elastic body,

18: coagulation band adhesive portion, 19: fixing portion of the re-adhesive fastening means,

20: coagulation band end adhesive portion, 21: perforated film,

D: Disposable Diaper.

Disposable diaper according to the present invention is a disposable diaper having a liquid permeable top sheet, a liquid impermeable back sheet, an absorbent body and a fastening means, characterized in that the perforated film is fixed between the liquid permeable top sheet and the absorbent body. In the present invention, the perforated film is formed so that the hole size of about 1 to 20 mm and the area of the formed hole is about 10 to 40% of the total area of the perforated film, and the shape of the perforated film is circular, polygonal, oval or free form. The width of the perforated film is about 0.5 to 1.5 times the width of the absorbent, and the length is 0.5 times the length of the absorbent to the size of the disposable diaper product, and the holes of the perforated film are formed to be symmetrical and positioned in the middle of the absorbent. It is desirable to.

When described in more detail with reference to the drawings as follows.

1 is a plan view showing when the disposable diaper D of the present invention is unfolded.

Disposable diaper (D) has an appearance in the form of an hourglass divided into the front waist (1), the crotch (2) and the back waist (3). The outer shape of the disposable diaper (D) does not necessarily have to be symmetrical structure in left and right and front and rear, but preferably should have a symmetrical structure.

FIG. 2 is a partial cross-sectional view showing a cross-sectional structure taken along the line A-A in the crotch portion 2 of FIG.

3 is a partial cross-sectional view showing a cross-sectional structure cut by the B-B line in the waist portion 1 of FIG.

Figure 4 shows a plan view of the perforated film used in the present invention to vary the size of the formed hole, it is shown that the various forms of arrangement by mixing holes of different sizes.

2 and 3 show a state in which the formation of the curd band 7 is different in the crotch portion 2 and the waist portion 1 and 3.

The present invention inserts the absorber 5 between the liquid impermeable backsheet 4 and the liquid permeable top sheet 6 to fix it using a hot melt adhesive, and solidifies with leakage preventing means on the left and right sides outside the absorber 5. A band 7 is formed to form a pocket that primarily confines the body fluid that is separated from the absorber 5. Leg band 10 is a secondary pocket to prevent leakage of the body fluid from the coagulation band (7) to the side of the disposable diaper (D) to maintain the skin adhesion of the leg portion. In addition, the waistband 11 maintains the skin adhesion of the waist portion, to maintain the disposable diaper (D) with the fastening means to the wearer's body.

The absorbent body 5 is composed of the superabsorbent polymer 13, the downy pulp 12, and the tissue 9, and functions to absorb and store the body fluids transmitted from the liquid permeable top sheet 6. In particular, the downy pulp 12 quickly absorbs the body fluids urinated, the high absorbent resin 13 absorbs and stores the body fluids absorbed by the downy pulp 12, and the tissues 9 are separated from the downy pulp 12. The pad is protected to maintain the pad form of the absorbent polymer 13.

The shape of the absorbent body 5 can be a straight, T-shaped, and hourglass shape, and the shape of the "T" is shown in FIG.

The function of the absorber 5 is changed by the content of the downy pulp 12 and the super absorbent polymer 13, the mixed state, the pad density, and the like. To become an ultra-thin disposable diaper (D), the absorbent body 5 can be easily made by using a small amount of the downy pulp 12 and using a large amount of the super absorbent polymer 13.

In the present invention, the perforated film 21 is inserted and fixed between the liquid permeable top sheet 6 and the absorbent body 5 so that the urine body fluid is permeated from the liquid permeable top sheet 6 and spreads evenly and widely on the absorbent body 5. Let's do it.

The perforated film 21 is a film formed by forming holes of the same size, or a film formed by mixing holes of different sizes, or one part of the film forms holes having the same size, and the other parts have the same holes of different sizes. It can be divided into the formed film.

The size of the perforated film 21 is the same width and length of the absorbent body 5 or the width and length smaller than the size of the absorbent body 5 or smaller than the width of the absorbent body 5 and the length can be distinguished by longer. have.

The surface of the perforated film 21 may be embossed or flattened, and the film thickness of the portion where the hole is formed may be greater than or equal to the thickness of the portion where the hole is not formed.

The shape of the hole formed in the perforated film 21 is formed in a polygon, oval, circular, free form, the size of the hole may appear different depending on the method of forming the hole and the elongation of the film, but the diameter of the formed hole is maximum The part is made 1-15 mm, Preferably it is 1-5 mm, and it forms so that the area in which the hole was formed in the area of the whole film is about 10 to 40%.

If the hole area of the perforated film 21 has a hole size of 1 mm or less, the area of the hole is 10%, which lowers the rate of urine absorption and the spread of the urine fluid is good, and the amount absorbed by the absorber 5 is less. If the area of the formed hole is more than 40%, the possibility of increase is increased, and the absorption rate and spreadability of the urinary body fluids are not obtained as compared with the case in which the perforated film 21 is not used. It causes problems in applying (21).

When the holes are arranged in the perforated film 21, holes having different sizes are arranged in regular rows or irregularly formed.

The coagulation band 7 has a pocket formed by the coagulation band adhesion part 18, the coagulation band end part 14, the coagulation band end adhesion part 20, and the coagulation band elastic body 17.

However, the body fluid leaving the absorbent body 5 and the coagulation band 7 still has a possibility of leaking, and forms a secondary pocket by the leg band 10 in order to prevent this, and the disposable diaper D is a baby body type. Closer contact with, to reduce the possibility of leakage.

In addition to the disposable diaper (D) forms a fastening means and a waistband 11 to be worn and maintained on the baby body.

The fastening means mainly includes a refastening fastening means 16 attached to the waist portion 3 at the rear of the disposable diaper D and a front fastening means 15 formed transversely at the waist portion 1 of the front portion of the disposable diaper D. ) Provides a target area to which the rebonding fastening means 16 can be bonded.

Re-adhesive fastening means (16) is mainly used adhesive fastening means, hook (mechanical) hook means, fastening means using a mixture of adhesive and hook mechanical means, the front fastening means (15) is a film or loop (loop) Fastening means are used.

The waistband 11 is formed by bonding an elastic body to the waist portions 1 and 3 of the disposable diaper D, and the leg band 10 is formed in the crotch portion 2 and the waist portion 1 and 3. It forms by adhering an elastic body.

The elastic body is mainly used polyurethane foam (polyurethane foam), polyurethane film (polyurethane film), polyurethane nonwoven elastomer and elastic yarn, the elastic yarn is used polyurethane spandex (polyurethane spandex) or natural rubber. In addition, the waist band 11 and the leg band 10 may be used by attaching the elastic chamber or elastic band to the elastic film or film to facilitate workability.

The leg band 10 is formed in the form of a "C" between the outer side of the absorbent body 4 and the ends of the liquid impervious back sheet 5, or in a straight line, with the crotch portion 2 and the front and rear waist portions 1 ( It can form over 3).

The leg elastic body of the leg band 10 is adhered between the liquid impermeable backsheet 5 and the liquid permeable top sheet 6 covering the nonwoven fabric or the absorbent body 4 forming the coagulation band 7 by hot melt adhesive. do.

In order for the leg band 10 to act as an effective leakage preventing means, the distance between the adhesive portion 18 of the coagulation band 7 and the outer leg elastic body 10 of the leg band 10 is greater than the height of the coagulation band 7. It is preferable. One or more elastic bodies are formed at an elastic modulus of 130 to 250%, but are preferably formed at an elastic modulus of 150 to 180%, which exhibits little deformation of the appearance of the disposable diaper (D).

The waist elastic body of the waist band 11 may be formed over the entire product width in the transverse direction between the longitudinal end of the disposable diaper (D) and the absorbent body 5, or may be partially shortened.

The front and rear waistbands 11 form elastic bodies of elastic yarns in a straight or curved shape in the transverse direction outside the absorber 5 at portions adjacent to the leg bands 10 of the waist portions 1 and 3.

Also in the waist portion (1) (3), the waist elastic body is fixed to or fixed to the fixing portion (19) of the reattachment fastening means (16) at the waist portion (3) of the rear portion where the reattachment fastening means (16) is located. It is possible to form the elastic means adjacent in the longitudinal width portion of 19).

Reference numeral 8 is a second nonwoven fabric.

Hereinafter, the present invention will be described in detail with Examples and Comparative Examples.

(Example 1)

In a conventional disposable diaper (D) consisting of a liquid permeable top sheet (6), a liquid impermeable backsheet (4), an absorbent body (5) and fastening means, the holes are irregularly arranged in a size of 1 to 5 mm, The perforated film 21 formed with the hole area of 15% of the total area of the film was set to 200 mm in length and 100 mm in width to be fixed to the middle portion of the absorber 5 between the liquid permeable top sheet 6 and the absorber 5 for single use. Diaper (D) was prepared.

(Example 2)

In Example 1, the permeable upper portion of the permeable film 21 having irregularly arranged sizes of 1 to 5 mm and having a hole area of 20% of the total film area having a length of 200 mm and a width of 100 mm was provided. A disposable diaper (D) was manufactured by fixing to the middle portion of the absorbent body (5) between the sheet (6) and the absorbent body (5).

(Example 3)

In Example 1, the permeable film 21 was irregularly arranged in a size of 1 to 5 mm, and the permeable film 21 having a hole area of 25% of the total area of the film was 200 mm long and 100 mm wide. A disposable diaper (D) was manufactured by being fixed to the middle portion of the absorbent body (5) between the topsheet (6) and the absorbent body (5).

(Example 4)

In Example 1, the permeable film 21 was irregularly arranged in a size of 1 to 5 mm, and the permeable film 21 having a hole area of 30% of the total area of the film was 200 mm long and 100 mm wide. A disposable diaper (D) was manufactured by being fixed to the middle portion of the absorbent body (5) between the topsheet (6) and the absorbent body (5).

(Example 5)

In Example 1, the permeable film 21 was irregularly arranged in a size of 1 to 5 mm, and the permeable film 21 having a hole area of 35% of the total area of the film was 200 mm in length and 100 mm in width. A disposable diaper (D) was manufactured by being fixed to the middle portion of the absorbent body (5) between the topsheet (6) and the absorbent body (5).

(Example 6)

In Example 1, the permeable film 21 was formed irregularly in the size of 1 to 5 mm, and the permeable film 21 formed with the hole area of 40% of the total film area was 200 mm long and 100 mm wide. A disposable diaper (D) was manufactured by being fixed to the middle portion of the absorbent body (5) between the topsheet (6) and the absorbent body (5).

(Comparative Example 1)

A conventional disposable diaper (D) consisting of a liquid permeable topsheet 6, a liquid impermeable backsheet 4, an absorbent body 5, and fastening means, without using the perforated film 21, was prepared.

(Comparative Example 2)

In Example 1, the permeable upper portion of the permeable film 21 having irregularly arranged sizes of 1 to 5 mm and having a hole area of 10% of the total film area having a length of 200 mm and a width of 100 mm has a liquid permeable upper portion. A disposable diaper (D) was manufactured by fixing to the middle portion of the absorbent body (5) between the sheet (6) and the absorbent body (5).

(Comparative Example 3)

In Example 1, the permeable upper portion of the permeable film 21 having irregularly arranged sizes of 1 to 5 mm and having a hole area of 45% of the total film area having a length of 200 mm and a width of 100 mm has a liquid permeable upper portion. A disposable diaper (D) was manufactured by fixing to the middle portion of the absorbent body (5) between the sheet (6) and the absorbent body (5).

The disposable diapers (D) manufactured according to Examples 1 to 6 and Comparative Examples 1 to 3 were subjected to a consumer review survey of 100 persons corresponding to a baby weight of 6 to 15 kg to wear disposable diapers from a baby mother. In the meantime, diaper agglomeration, glands formation and urine spread were observed to determine the degree of difference between the products. The results are shown in Table 1.

Consumer Diaper Usability Satisfaction Assessment division Consumer Usability Satisfaction Rating (100 People, 5 Point Scale) Urinary spread Absorbent Aggregation Spring Judgment Example 1 4.3 4.5 4.1 Great Example 2 4.2 4.5 4.1 Great Example 3 4.2 4.3 4.1 Great Example 4 4.0 4.3 4.0 Great Example 5 3.9 4.2 3.9 Great Example 6 3.8 4.2 3.8 Great Comparative Example 1 3.5 3.7 3.0 usually Comparative Example 2 3.4 3.8 2.4 Inadequate Comparative Example 3 3.6 3.0 3.7 usually

Customer satisfaction rating;

1 point: very uncomfortable, 2 points: a little uncomfortable, 3 points: normal,

4 points: A little satisfied. 5 points: Very satisfied.

Determining disposable diaper excellence based on customer satisfaction;

Very good: all items have at least 4.5, or at least 4.1 and no more than 4.5

Excellent: All items contain at least 3.5, or 3.1 to 3.5

Normal: All items contain 3.0 or more and 2.6 to 3.0 or less

Insufficient: All items contain at least 2.5 and at least 2.5 items

The properties of the urine absorption rate, urine spreadability, pad aggregation, pad width reduction, and leakage of the disposable diapers manufactured according to Examples 1 to 6 and Comparative Examples 1 to 3 were evaluated and the results are shown in Table 2. .

Evaluation of Physical Properties of Examples and Comparative Examples division Property evaluation Absorption rate (sec) Urinary Spreadability (㎠) Pad width reduction (%) Leakage generation (g) Pad aggregation (visual observation) Example 1 15 190 93 0 Good pad Example 2 18 185 93 0 Good pad Example 3 18 180 90 0 Good pad Example 4 20 178 90 0 Good pad Example 5 23 175 90 0 Good pad Example 6 25 170 87 0 Good pad Comparative Example 1 30 149 80 20 Pad cutting Comparative Example 2 18 240 93 30 Good pad Comparative Example 3 28 150 82 0 Pad cutting

Absorption rate: A sensor is used to measure the time at which 50 ml of 0.9% Nacl solution (artificial urine) is absorbed from the diaper surface.

Urinary Spreadability: Measures the area where 50 ml of artificial urine is absorbed and spread from the diaper surface.

Pad width reduction and agglomeration: 150ml artificial urine was urinated using a moving mannequin. Absorbent width reduction rate and absorbent pad breakage were visually observed and the amount of glands was measured after leg exercise for 2 hours.

As shown in Tables 1 and 2, Comparative Examples 1 and Comparative Examples 1 and 6, which are products of the present invention and conventionally known disposable diapers, and Comparative Examples 2 and Comparative Examples in which the perforated film had an area ratio of 10% or less and 40% or more were formed. 3 As a result of performing physical property evaluation and product evaluation including mannequin evaluation for the product, the actual product evaluation of the product of the present invention was superior to that of the comparative example product, and the comparative example 2 product had a large amount of leakage, especially the customer satisfaction. Also in the result, it seems that it appeared inferior to a well-known product. As in the evaluation results, it is determined that the example product of the present invention improves the diffusion force of the urine bodily fluid by applying the perforated film, thereby improving the usability effect of the disposable diaper.

Disposable diaper products of the present invention as described above has the effect of improving the usability in all aspects such as absorption rate, urine spreading, reduction of pad width, leakage amount pad aggregation property, etc. than the conventional known disposable diapers by applying a perforated film have.

Claims (6)

A disposable diaper having a liquid permeable topsheet, a liquid impermeable backsheet, an absorbent body and a fastening means, Disposable diaper, characterized in that the perforated film is fixed between the liquid permeable top sheet and the absorbent body. The method of claim 1, The perforated film is a disposable diaper, characterized in that the hole size of about 1 to 20 mm and the area of the formed hole is formed to about 10 to 40% of the total area of the perforated film. The method according to claim 1 or 2, Disposable diaper, characterized in that the hole shape of the perforated film has a shape of round, polygonal, oval or free form. The method according to claim 1 or 2, Disposable diaper, characterized in that the width of the perforated film is about 0.5 to 1.5 times the width of the absorbent body, the length of the perforated film is 0.5 times the absorber length to the size of the disposable diaper product. The method according to claim 1 or 2, Disposable diaper, characterized in that the hole of the perforated film is formed symmetrically. The method according to claim 1 or 2, Disposable diaper, characterized in that the perforated film is located in the middle of the absorbent body.