KR100713009B1 - Disposable diaper - Google Patents

Abstract

The present invention relates to a disposable absorbent product having excellent leakage preventing effect, and a disposable diaper which forms elastic means of a waistband and a legband in a longitudinal direction around the absorbent body.

The legband of the crotch portion and front and back waist portions of the disposable diaper is curved over the crotch portion and front and rear waistband portions so as to form a "C" between the outside of the absorber and the ends of both sides of the liquid impermeable back sheet. And a straight line having a plurality of curved repetition periods or a straight line in the transverse direction outside the absorber at a portion adjacent to the leg band of the front and rear waistband portions. The elastic means is fixed to the disposable diaper fixing part of the re-adhesive fastening means or is formed adjacent to the elastic means in the longitudinal width portion of the fastening part, and the waistband at the rear part with the re-adhesive fastening means connects the elastic means between the absorber outer side and the re-adhesive fastening means Including the elastic means in the re-adhesive fastening means fixed to the disposable diaper fixing portion or the longitudinal width of the fixing portion Formed adjacent the resilient means within minutes by the leak-barrier effect to provide a superior disposable diaper.

Diapers, Sam, Prevention, Elastic, Waistband, Legbands

Description

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;

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

1: front waist, 2: crotch,

3: posterior waist, 4: liquid impermeable backsheet,

5: absorbent, 6: liquid permeable topsheet,

7: poop band, 10: leg band,

11: waistband, 14: pore band end,

15: front fastening means, 16: reattachment fastening means,

17: the solidification band elastic body, 18: the solidification band adhesive portion,

19: fixing part of the reattachment fastening means, 20: coagulation band end adhesive part.

The present invention relates to a disposable absorbent product having excellent leakage preventing effect, and relates to a disposable diaper forming an elastic means of a waistband in the transverse direction and a legband in the longitudinal direction around the absorbent body.

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 ), Sanitary napkins and panty liners.

It is preferable to apply to a disposable diaper among disposable absorbent articles in this invention. 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, super absorbent polymer, tissue, etc., and absorbs the fluid through the liquid permeable top sheet at a high speed, and the absorbed body fluid is again absorbed into the skin. To absorb and retain body fluids to prevent contact with them.

The liquid impervious backsheet prevents body fluids absorbed by disposable diapers from leaking underneath the absorber to contaminate the wearer's clothing or the surrounding environment.It mainly uses polyethylene film, Non-woven fabrics may also be bonded to improve 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. Each material is also adhesively fixed by hot melt adhesive, heat fusion or other bonding method.

The technical level of disposable absorbent products, including disposable baby diapers, incontinent diapers, and women's sanitary napkins, is fundamental in terms of the rate and rate of absorption of body fluids discharged by physiological action. The performance can be adjusted so that there is no inconvenience for the user.

Disposable diapers have been developed in the direction of improving the fit in meeting basic performance, one way to achieve this has become an ultra-thin disposable diaper by making the absorber thinner.

An easy way to make ultra-thin disposable diapers is to use less bulky pulp and a high absorbent polymer.

In such ultra-thin disposable diapers, when the ratio of the blended content of the fluffy pulp and the super absorbent polymer is not appropriate, the disposable diapers may be worn for a long time, or when the baby's activity or movement is severe, the diaper may fall below the initial wearing state of the disposable diapers. In addition, the absorber is reduced in width, and the absorber is distorted to cause agglomeration or cracking.

Therefore, this modified absorber is poor in functionality due to its poor functionality, and the likelihood of leakage occurs.

In addition, the modified absorber generated during use decreases the absorbed area, which increases the possibility of leakage, especially when urinating in a side lying position, and the liquid permeable nonwoven fabric is hydrophilic, but the hydrophilic surface becomes hydrophobic due to repeated urination. The change in delayed delivery to the absorber during urination results in a higher chance of glands in the modified absorbent.

As a means for preventing such leakage, a solidifying band and a leg elastic body are formed around the absorber.

Leg elastics are formed in a straight or curved form across the crotch portion of the disposable diaper, and the waistband forms an elastic body back and forth at the longitudinal end of the disposable diaper.

However, when the disposable diaper is worn for a long time due to insufficient waistband function, sagging occurs, and it is not a satisfactory level in the effect of preventing leakage.

In the present invention to solve this problem more fundamentally, the leg band of the crotch portion and front and rear waist portion of the disposable diaper is a "C" shape between the outer end of the absorbent and both ends of the liquid impermeable back sheet It is formed in a curved shape over the crotch portion and the front and rear waistband portion as possible, and in a portion adjacent to the legband of the front and rear waistband portion, in the horizontal direction outside the absorber or in a straight line having a plurality of curved repetition periods, The rear waistband with re-adhesive fastening means secures the resilient means to the disposable diaper fastener of the re-fastening fastening means or forms elastic means adjacent in the longitudinal width of the fastening means, The waistband includes a resilient means including elastic means between the outer side of the absorbent body and the rebonding fastening means. Fixed to the fixed part of the disposable diaper or the fastening means and formed adjacent to the elastic means in the longitudinal direction of the part width government to provide a disposable diaper having excellent leakage preventing effect.

The present invention relates to a disposable diaper having a liquid permeable topsheet, a liquid impervious backsheet, an absorbent body and a fastening means, wherein the leg band has at least one leg elastic end portion between the outside of the absorbent body and both ends of the disposable diaper. It is formed in the shape of "C" to be located within half of the waist from the crotch part and the longitudinal end of the front and rear waist. The front and rear waistband is adjacent to the leg band of the waist and the liquid It is a disposable diaper characterized in that it is formed in the transverse direction of the impermeable back sheet.

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

1 is a plan view showing when the present invention is expanded.

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

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

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

The present invention inserts the absorbent body 5 between the liquid impermeable backsheet 4 and the liquid-permeable top sheet 6, and fixes it by using a high temperature molten adhesive. A coagulation band 7 is formed to form a pocket that primarily confines the body fluid which is separated from the absorbent body 5.

The coagulation band 7 is formed with a pocket 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. FIG.

However, body fluid leaving the absorber 5 and the coagulation band 7 still has a possibility of leaking, and forms a secondary pocket by the leg band 10 to prevent this, and the disposable diaper is better adapted to the baby body type. Close contact reduces the possibility of leakage.

In addition, the disposable diaper forms a fastening means and a waistband 11 to be worn and maintained on the baby's body.

The fastening means is mainly the re-adhesive fastening means 16 attached to the waist portion 3 of the back portion of the disposable diaper and the front fastening means 15 formed transversely to the waist portion 1 of the front portion of the disposable diaper. Provide a target area to which 16 can be bonded.

The waist band 11 is formed by bonding an elastic body to the waist portions 1 and 3 of the disposable diaper, and the leg band 10 is formed by bonding the elastic body over the crotch portion and the waist portion.

The elastic body mainly uses polyurethane foam, polyurethane film, polyurethane nonwoven elastic body and elastic yarn, and the elastic yarn uses polyurethane spandex or natural rubber.

The leg band 10 and the waist band 11 formed by the leakage preventing means of the present invention will be described in more detail as follows.

The leg band 10 is curved over the crotch portion 2 and the front and rear waist portions 1 and 3 so as to form a “C” shape between the outside of the absorbent body 5 and the ends of both sides of the liquid impervious back sheet 4. Form into a mold.

The length of the leg band 10 is the distance at which the ends of the leg elastics are located at the front and rear waists (1, 3), wherein at least one leg elastic end is the front and rear waists (1) from the longitudinal end of the disposable diaper. It is preferable to locate at 1/2 position of (3). More preferably, the leg elastic body of the leg band 10 at the rear waist portion 3 is formed to be fixed to the disposable diaper fixing portion 19 of the re-adhesive fastening means 16.

In addition, between the outer end of the absorbent body 5 and the opposite ends of the liquid impermeable back sheet 4, the outer elastic body of the leg elastic body is located at a point of 10 to 20 mm from both ends of the liquid impermeable back sheet 4. desirable.

The leg elastic body of the leg band 10 is adhered between the liquid impermeable back sheet 4 and the liquid permeable top sheet 6 covering the nonwoven fabric or the absorbent body 5 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, it is preferable that the distance between the adhesive portion 18 of the coagulation band 7 and the outer leg elastic body of the leg band 10 is greater than the height of the coagulation band 7. .

The elastic body of the leg band 10 is mainly used in the form of an elastic thread or elastic band and the material is polyurethane spandex or natural rubber.

One or more elastic bodies are formed at an elastic modulus of 130 to 250%, but preferably at an elastic modulus of 150 to 180%, which exhibits little deformation of the appearance of the disposable diaper.

In particular, the waistband 11 of the rear portion with the re-adhesive fastening means 16 is fixed to the fixing portion 19 of the re-adhesive fastening means 16 or within the longitudinal width portion of the fixing portion 19. Form adjacently.

Alternatively, the waistband at the rear part having the re-adhesive fastening means 16 includes an elastic means between the outer side of the absorbent body 5 and the re-adhesive fastening means 16, and the disposable diaper fixing part of the re-adhesive fastening means 16. The elastic means is fixed to 19 or adjacently formed in the longitudinal width portion of the fixing portion 19.

The front and rear waistbands 11 are formed in a straight line having a horizontally straight line or a plurality of curved repetition cycles between the outer side of the absorber 5 and the longitudinal end of the disposable diaper at the portion adjacent to the legband 10 of the waist portion. do.

The waist band 11 is formed adjacent to the leg elastic body of the leg band 10 in the front and rear waist parts (1, 3).

In the present invention, the adjacent shape means that the elastic body of the waist band 11 and the elastic body of the leg band 10 are formed within 20 mm in the front and rear waist parts 1 and 3.

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

Front and rear waistband 11 is formed in a straight or curved in the transverse direction of the absorber (5) outside the portion adjacent to the leg band 10 of the waist portion. More preferably, in the waist portion 3 of the rear portion, the waist elastic body is fixed or fixed to the fixing portion 19 of the reattachment fastening means 16 in the back portion 3 of the rear portion where the reattachment fastening means 16 is located. An elastic means is formed adjacent in the longitudinal width portion of the government portion 19.

The waist and leg elastics may be formed by using an elastic yarn or an elastic band, or by attaching the elastic yarn or the elastic band to an elastic film or a film to facilitate workability.

Reference numeral 8 is a second nonwoven fabric, 9 is tissue, 12 is fluffy pulp, and 13 is a high absorbent resin.

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

(Example 1)

In a conventional disposable diaper consisting of a liquid permeable topsheet 6, a liquid impermeable backsheet 4, an absorbent body 5 and fastening means, at least one leg elastic end is a longitudinal end of the front and back waists. It was formed in the shape of "C" to be located within a half point of the waist from the waist, and the front and rear waist band 11 is in the transverse direction of the absorber (5) outside in the portion adjacent to the leg band 10 of the waist It was formed in a straight shape, and the front and back waist elastic body was made of a disposable diaper with the same length.

(Example 2)

At least one leg elastic body in Example 1 is formed to be located within a half point of the waist portion from the longitudinal end of the front waist portion, the leg of the leg band 10 at the waist portion 3 of the rear portion The elastic body was fixed to the fixing portion 19 of the re-adhesive fastening means 16 was formed in the shape of "C", the front waist band 11 is an absorbent body (absorption) in the portion adjacent to the leg band 10 of the waist portion ( 5) It is formed in a straight shape in the horizontal direction of the outside, the waist elastic body in the waist portion (3) of the rear portion is the high of the re-adhesion fastening means (16) in the back portion (3) of the rear portion with the re-adhesive fastening means (16) It was formed to be fixed to the government (19), the front and rear waist elastic body was made of the same length to prepare a disposable diaper.

(Example 3)

At least one leg elastic body in Example 1 is formed to be located within a half point of the waist portion from the longitudinal end of the front waist portion, the leg of the leg band 10 at the waist portion 3 of the rear portion The elastic body was fixed to the fixing portion 19 of the re-adhesive fastening means 16 was formed in the shape of "C", the front waist band 11 is an absorbent body (absorption) in the portion adjacent to the leg band 10 of the waist portion ( 5) It was formed in a straight shape in the horizontal direction of the outside, the waist elastic body in the waist portion (3) of the rear portion is disposable of the re-adhesion fastening means (16) in the back portion (3) of the rear portion with the re-adhesion fastening means (16) An elastic means was formed adjacent to the diaper fixing portion 19 in the longitudinal width portion, and the front and rear waist elastic bodies had the same length to prepare a disposable diaper.

(Comparative Example 1)

In a conventional disposable diaper consisting of a liquid permeable topsheet 6, a liquid impermeable backsheet 4, an absorbent body 5 and fastening means, at least one leg elastic end is a longitudinal end of the front and back waists. The front and rear waist bands (11) were formed in a straight line in the transverse direction outside the absorber (5) at the waist, and the front and rear waist elastics were the same. Disposable diaper was manufactured by length.

The evaluation of the occurrence of leakage of disposable diapers manufactured by Examples 1 to 3 and Comparative Example 1 was carried out a consumer review survey of 100 people corresponding to the baby model mannequin and the weight of the baby 6-15kg The frequency of leakage was observed while wearing disposable diapers to determine the degree of difference between products, and the results are shown in Tables 1 and 2.

Mannequin Assessment of Sam Development division Leakage generation (g) Lying down Prone Prone Example 1 15 20 80 Example 2 10 5 50 Example 3 15 10 70 Comparative Example 1 70 50 150

Sampling rate evaluation: 200 ml / time was urinated at 7 ml / sec and a large baby model was used.

Consumer survey judgment result division Symptom Judgment + ± - Example 1 87 10 3 Great Example 2 94 4 2 Very good Example 3 90 8 3 Very good Comparative Example 1 69 15 16 usually

In Table 2, "+" means that no leakage occurred during the use of the disposable diaper, "+" indicates that there was a small amount of leakage occurred during the use of the disposable diaper, and "-" indicates the occurrence of leakage during the use of the disposable diaper. ". In addition, very good is the case where "+" is 90% or more, and good is the case where "+" is 80 to 90%, and usually "+" is less than 70%.

As shown in Tables 1 and 2 above, the mannequin evaluation and the product were made with respect to Comparative Examples 1, which are Examples 1 to 3 products of the present invention and conventionally known disposable diapers, and as a result, the actual product evaluation was carried out. It appeared better than the comparative example product, and it is judged that the product of Example 1 is the best.

In the present embodiment of the present invention, the incidence of leakage due to actual use is estimated to be 20 to 25% improvement over known disposable diapers.

As described above, the disposable diaper according to the present invention more effectively forms the elastic means of the waist band in the horizontal direction and the leg band in the longitudinal direction around the absorbent body, so that the leakage preventing effect is superior to that of the conventional disposable diapers as in the comparative test. Has an improved effect.

Therefore, the disposable diaper of the present invention is very useful industrially.

Claims (5)

In a disposable diaper having a liquid permeable topsheet 6, a liquid impermeable backsheet 4, an absorbent body 5 and fastening means, the legband 10 has an outer side of the absorbent body 5 and a liquid impermeable backsheet 4. ) It is curved between the crotch part 2 and the front and rear waist parts 1 and 3 so as to form a “C” shape between the end parts of both sides, and at least one leg elastic end part is formed in the longitudinal direction of the disposable diaper. Located in the half point of the front and rear waist (1, 3) from the end, the leg elastic body of the leg band 10 in the rear waist (3) of the fixing portion (19) of the re-adhesive fastening means (16) It is fixed to the), disposable diaper, characterized in that the front and rear waist portion (1,3) is formed adjacent to the distance between the legband and the elastic body of the waistband 10 within 20mm in the nearest portion. delete  The disposable diaper according to claim 1, wherein the elastic end portion of the rear waistband is not fixed to the fixing portion of the disposable diaper of the reattachment fastening means and is positioned between the reattachment fastening means of both sides. delete The disposable diaper according to claim 1 or 3, wherein the elastic body is a film adhered to an elastic thread, elastic band or elastic thread.

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