KR0180120B1 - A disposable diaper - Google Patents

Abstract

The present invention relates to a disposable absorbent article, comprising a absorbent layer (3) inserted between a fluid permeable upper sheet (1) and a fluid impermeable backsheet (2), the upper layer of the fluid permeable upper sheet. By attaching at least one low-density fluid permeable separate member that plays a role in the absorption diffusion transmission of the fluid, allowing the user to change the position of the fluid permeable separate member directly, by switching the position according to the urination position of men and women before use It is characterized by providing a disposable absorbent product for both sexes by one standard.

Description

Unisex disposable absorbent product with improved absorption and diffusion

1 is a plan view of a disposable absorbent article to which a separate member serving as an auxiliary role of absorption and diffusion according to the present invention is applied.

2 is a cross-sectional view taken along the line A-A in FIG. 1 and relates to a method of applying and attaching a separate member.

3 and 4 are cross-sectional views showing another embodiment of FIG.

* Explanation of symbols for main parts of the drawings

1 fluid permeable upper sheet 2 fluid permeable lower sheet

3: absorber layer 4: separate fluid permeable member

a: joining site of a separate member

b: distance from absorber center to separate member coupling site

c: Separate member width d: Separate member length

e: separate adhesive member

The present invention provides a disposable absorbent product, by applying a separate member suitable for fluid permeation and reducing the leakage of excretion between the absorbent layer and the excreted bodily fluid and allowing the user to switch the direction and position of the material. It relates to a disposable absorbent product, characterized in that it has a suitable absorbent structure according to the body shape and the conditions of use.

In the present invention, the disposable absorbent product refers to a disposable hygiene product that absorbs the fluid impermeable envelope, the fluid permeable envelope, and the excrement caused by the physiological action of a person having an absorbent therebetween.

In addition, in the present invention, the separate member refers to a non-woven fabric, a woven fabric, or a film, which is a sheet-like material used in the urination portion to help rapid absorption and diffusion of excretion other than the components on the upper layer of the absorbent product. In particular, due to the difference in hydrophilicity and capillary density, it shows a faster absorption rate than other parts, and one or more parts are separated from the absorber, so that the user switches directions and positions to provide a suitable absorber according to the user's gender, body type and conditions of use. Characterized in that.

In many known disposable diapers, the technology classified according to the user's condition varies the content and density of absorbent material, such as pulp and superabsorbent resin, according to the difference in the location of urination according to gender. The nonwoven and fibrous layers may also be applied separately in different positions as the fluid delivery diffusion layer. For example, in the disposable diaper of a boy whose urination position is directed to the whole compared to the girl, the absorbent content and the fluid transfer and diffusion layer are directed to the front part as compared to the girl.

However, in the case of the preceding invention, although the fluid is quickly absorbed and stored according to the conditions of the user such as men and women, the range of the user is limited in advance before production before the user uses the product, and accordingly, according to the type during distribution and store display. Since all of them must be produced and equipped, there were problems such as a decrease in efficiency due to changes in specifications during production, a lack of display space in distribution, and management of specifications during operation. In addition, in terms of raw material cost, a relatively expensive nonwoven fabric used in the fluid diffusion layer has to be applied to the entire location where urination is possible regardless of gender. In addition, the user has a disadvantage in that the purchase must be classified according to the type.

Therefore, an object of the present invention is to increase the absorption rate and dryness by applying a separate member between the absorbent layer and the excrement that can change the position according to the wearer's conditions, that is, gender and age, and adjust one standard to meet the conditions of various users Provide disposable absorbent products where possible.

In the present invention, the fluid permeable upper sheet is a known one used in ordinary disposable absorbent articles, and the fluid permeable sheet most commonly used is a nonwoven fabric. The fluid impermeable backsheet is generally composed of a fluid impermeable film mainly composed of polyethylene, polypropylene, etc. and is located on the outer surface of the wearer and prevents the discharge of the excretion to the outside. An absorbent composed of tissue, nonwoven fabric, downy pulp, superabsorbent resin, and the like is interposed between the upper sheet and the rear sheet, and forms an absorber length and a back absorber width, and serves to absorb and store excrement.

A conventional disposable absorbent article is composed of a conventional fluid permeable top sheet 1, a fluid impermeable back sheet 2, and an absorbent body 3 interposed on a moving material. The following materials are optionally used as auxiliary materials.

Tissue, adhesive tape or fastening button, front tape, frontal tape, thigh or waist elastics, barrier cuff, leg standing cuff, waist standing cuff, super absorbent material, adhesive System for fixing to underwear such as hotmelt, glue) and panties.

The present invention attaches a sheet-like material that can contribute to the delivery and diffusion of fluid to a portion of such a conventional disposable absorbent product, wherein the material is separated from the absorbent product so that the position can be shifted in one or more directions. It is to provide a disposable absorbent product that is easy to transfer and diffuse the absorption of the fluid compared to other parts by changing the position as it is.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 shows a plan view of a disposable absorbent article according to the present invention.

The absorbent layer 3 is inserted between the fluid permeable upper sheet 1 and the fluid impermeable back sheet 2 to form a disposable diaper.

The absorbent layer 3 may be formed of at least one or more multilayers, and may be appropriately uniformly mixed with the superabsorbent material or partially formed with the superabsorbent material layer to be impregnated between the down layers.

In addition, a separate fluid permeable member 4 capable of assisting absorption transmission diffusion of the fluid on the fluid permeable upper sheet 1 is adhered to the fluid permeable upper sheet at a partial attachment site a to the separate member ( 4) is bound to the absorbent product.

According to the study of the present invention, even in infants and toddlers with a small difference in sex between men and women, the distance between the urinary region and the center of the absorbent is different, and in the case of boys, the position of the sex organs is directed upwards when worn. Becomes large. Table 1 shows the results of the inventors measuring the actual genital position and the urination position of the urinated absorbent product for 100 infants.

* Penis position is the distance from the navel to the penis

* * Urination position is the central position of the urination part at the front end of the absorber after wearing the absorber.

As can be seen from the above results, the position of the genitals of men and women varies greatly with age, and the gender difference in the location of urination is larger than the difference of genital positions. It comes from habit.

In addition, many well-known previous studies have applied non-woven fabrics in multiple layers as a means of assisting the initial absorption and diffusion transfer of absorbers. Especially, when a low-density hydrophilic non-woven fabric is applied, the urine is prevented and absorbed by rapid urine absorption. It is also good for skin stability by preventing discharge.

The location of urination in men and women differs by at least 3 cm or more, and in particular, as the absorption rate of the fluid-permeable upper sheet increases, it contributes to the prevention of leakage and the dryness of the skin contact surface. need. In particular, unlike commercially available products, changing the diffusion layer to a suitable position for consumer use by one standard has advantages in terms of raw material saving and convenience of distribution.

The separate member 4 can change its position according to the user difference, such as men and women, and in the case of boys, the urination position is directed to the front part, so wear it adjusted to the C direction, and in the case of girls to switch to the D direction Properly positioned in the urination position shows a high rate of urination.

2 to 4 are cross-sectional views taken along the line A-A of FIG.

As in (a) of FIG. 2, the absorbent article is formed by inserting an absorbent layer 3 between the fluid permeable upper sheet 1 and the fluid impermeable backsheet 2, and on the upper layer of the fluid permeable upper sheet 1. A separate member was formed by adhering to the joining position (a). An adhesive part (a) is bonded to the fluid permeable upper sheet 1 by a bonding method such as adhesive, heat, and ultrasonic waves, and a separate member 4 is connected to the fluid permeable upper sheet 1 so that it can be switched in one or more directions. Should be separated.

(B) of FIG. 2 shows the case where the position of the separate member of (a) of FIG. 2 is changed in direction.

FIG. 3 shows another embodiment of FIG. 2, wherein the separate member 4 is fluid-permeable using a second separate adhesive member (e, e ') in both directions of a and a' rather than in one direction. In the case of bonding to the sheet 1, unlike in FIG. 2, the resistance in bending in both directions is less, and thus there is less position change.

FIG. 4A illustrates an embodiment in which a part of the fluid permeable upper sheet 1 forms a separate member. As shown in FIG. 4, the fluid permeable upper sheet 1 extends to the outside to form a separate member 4. The separated fluid-permeable upper sheet 1 in the other direction is connected to the lower portion and is bonded at the binding site (a).

FIG. 4 (b) shows that one fluid permeable upper sheet 1 is bent outwardly to form a separate member 4, and the bent portion of the fluid permeable upper sheet 1 has two layers. Have

In this way, when the means for assisting the diffusion of absorption in a specific area according to the location of urination can be obtained an efficient absorption area with a small amount of raw materials, and contributes to a fast urine absorption rate and reduced wet-back.

For the following Examples and Comparative Examples will be described the location and size of the effective separate member suitable for the gender unisex, the improvement of raw materials and urination properties.

[Examples 1-4 Comparative Examples 1-3]

Experimental Method

Using 9 × 5cm polypropylene thermal adhesive non-woven fabric, the sample was attached to the upper layer of a conventional panty-type diaper, and 20 specimens were used for 50 men and women between 18 and 24 months. Check the difference between the position and the separate member.

At this time, in the case of a boy, a separate member position is worn toward the front part, and the girl is worn to the rear part on the contrary.

* Judgment method:

+++: Urination ranges up to 70% or more in urine

+ +: Urination range of 60% or more included in separate absence area

+: Urination ranges up to 40% or more in urine

－: Urination range of 20% or more in urine

－－: Urination range of 20% or less in urination included in separate absence area

In Examples 1 to 4 and Comparative Examples 1 to 3, the position for attaching a separate member of 9 × 5 cm is within a predetermined range at the center of the absorber, and when exceeded, the urine is not urinated in the region of the separate member. The urination of the range eliminates the efficiency of using separate members.

The reason for this phenomenon is that the urination position of boys and girls is 3 ~ 5cm difference as shown in Table 1, and the urination position is about 7 ~ 8cm for boys and 10 ~ 13 for girls In the case of Example 2, if the attachment position is 9 cm away from the center of the absorber in the case of Example 2, the direction of the separate member remains at about 6.5 cm from the center of the absorber. In the case of facing the front of the separate member, the central position of the separate member is about 11.5 cm apart so that the urination position of each sex is close to each other.

However, in the case of Comparative Example 1, if the separate member is 3cm apart, as in Example 2, when the male and female are worn, the urination position becomes independent of the separate member position, so the efficiency of the separate member is greatly reduced. This result is the same also in Comparative Examples 2-3.

[Examples 5-8 and Comparative Examples 4-8]

Experimental Method

Using polypropylene thermal adhesive non-woven fabric, attach the sample to the upper layer of the conventional panty-type diaper and 9.5 cm away from the center of the absorber, and then use 20 specimens for 50 men and women between 18 and 24 months. Collect and confirm the difference between urination location and separate absence.

At this time, in the case of a boy, the separate member positions face the front part, and the girl wears the face toward the rear part.

* Judgment method:

+++: Urination ranges up to 70% or more in urine

+ +: Urination range of 60% or more included in separate absence area

+: Urination ranges up to 40% or more in urine

－: Urination range of 20% or more in urine

－－: Urination range of 20% or less in urination included in separate absence area

In Examples 5 to 8 and Comparative Examples 4 to 8, after adhering a separate member at a position of 9.5 cm in the absorbent body which is an intermediate position of the urination position of male and female according to the irradiation result in Table 1, the experiment was performed by changing the size of the separate member. One result.

When the size of the separate member is 30 cm 2 or less, as in Comparative Examples 4 to 8, it is not sufficient area, it can be seen that the difference between the urination position and the efficiency is small.

Therefore, in order to fully play the role of urine diffusion and absorption delivery, the area of the separate member must be more than a certain area, preferably 10 cm 2 or more and 300 cm 2 or less, more preferably 30 cm 2 or more and 110 cm 2 or less. It is suitable for absorbent products of unisex.

[Examples 9-12 and Comparative Examples 9-12]

Experimental Method

As in the case of Example 8, the upper layer of the general panty-type diaper of the late zone, which is made of a separate member by using air-through nonwoven fabric of PP-thermalbond and mixed synthetic fibers having different densities of 9 × 12 cm 2, and is 9.5 cm from the center of the absorber. Attach at a remote location. For each specimen, the urine absorption rate and wet-back are measured using 0.9% NaCl artificial urine.

-Absorption rate: Measure the time required for complete absorption after taking 30ml of artificial urine using Lister device of Lenzing AG.

-Wet-Back: After dropping 100ml artificial urine on the absorber and leaving it for 10 minutes, put the 0.5psi pressure weight on 5 sheets of absorbent paper and measure the weight change of the absorbent paper after 2 minutes spindle.

As a result of experiment by changing the type and density of nonwoven fabric applied as a separate member, the rate of absorption of air-through nonwoven fabric was superior to that of thermal bond nonwoven fabric with a dense bonding point, and it was affected by the density of raw materials. As can be seen in Comparative Examples 9 to 10 and Examples 9 to 12, the smaller the density, the larger the size and number of capillaries, the greater the rate of absorption, but on the contrary, the amount of wet back tends to increase as the density becomes smaller. Therefore, in the case of a separate member applied as the urine absorption diffusion layer, a density of 150 kg / ㎥ or more is suitable for increasing the urine absorption rate and reducing the wet back.

Therefore, the present invention uses a low density sheet-like material that contributes to the rapid absorption, delivery, and diffusion of excreta as a separate member, and when introduced into a suitable position at a suitable size, the user can also change the position of the separate member directly before wearing By using it, it is possible to provide a disposable absorbent product for both sexes by one standard, and it can be expected to have an effect such as faster absorption rate, wet-back prevention, and raw material cost reduction compared to known disposable absorbent products.

Claims (8)

In a disposable absorbent article composed of a fluid impermeable backsheet and a liquid permeable upper sheet, and having an absorbent therebetween, at least one fluid-permeable nonwoven fabric or sheet-like material of a separate member is attached, and the direction of the material Disposable absorbent product, characterized in that the position of the concentrated absorption zone of the fluid is formed differently by switching. The disposable absorbent article of claim 1 wherein the separate member formed by the fluid permeable sheet is configured by extending a portion of the fluid permeable upper sheet. The disposable absorbent article according to claim 1, wherein the range of the fluid concentrated absorption region formed by the separate fluid permeable sheet is 10 cm 3 or more and 300 cm 3 or less. 2. The disposable absorbent article of claim 1 wherein the range of fluid concentrated absorbing regions formed by separate fluid permeable sheets is at least 6 cm in width portion and at least 5 cm in length. The disposable absorbent article according to claim 1, wherein a separate member is attached to the absorbent article by an adhesive, heat, ultrasonic waves, and the like in at least one portion. The disposable absorbent sheet material of claim 1, wherein the separate fluid permeable sheet material forming the concentrated absorbing zone of the fluid is made of a nonwoven fabric, a woven fabric, a film, or a combination of three or more of the fibrous material in a sheet form. product. The disposable absorbent article of claim 1 wherein the separate member has a density of 150 kg / m 3 or less to assist in the absorption diffusion of the fluid. The disposable absorbent article of claim 1, wherein the separate fluid permeable sheet material forming the concentrated absorbing region of the fluid is comprised of natural fibers, artificial fibers, and a combination of one or more fibers selected from the two materials.