JP2810520B2 - Disposable wearing articles - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to disposable wearing articles, and more particularly, to disposable wearing articles such as diapers, incontinence pants, and training pants.

(Prior art and its problems) Conventionally, this type of wearing article has an elastic member attached to a leg surrounding portion thereof. Generally, the elastic member has an elongated elastic member fixed to at least one of the top and back sheets with an adhesive.

Depending on the article, for example, in disposable diapers, regardless of whether the wearer is a man or a woman,
Depending on the position and orientation of the urinary tract, excreted liquid tends to leak from the lower part of the diaper leg, that is, both side edges of the crotch part.

Therefore, it is preferable that the diaper is configured so that the compression area by the elastic member in the lower part of the leg surrounding part can be made wider than the other part of the leg surrounding part.

However, in diapers conventionally proposed and put to practical use, no consideration is given to changing the arrangement interval in the length direction of a plurality of elastic members.

The present invention is intended to keep the wearing condition of the article in good condition and to prevent leakage of excreted liquid, etc., so that the arrangement interval of each of the plurality of elastic members in each of the two leg surrounding portions is set in the length direction thereof. It is an object to provide changed articles.

(Means for Solving the Problems) According to the present invention for solving the above problems, a plurality of elastic members are respectively provided in the leg surrounding portions on both sides of the crotch region located between the front and rear regions of the top sheet and the back sheet. It is intended for disposable wearing articles attached.

In the present invention according to the object, the both leg surrounding portions are formed in a concave curved edge, and the plurality of elastic members are arranged in a concave curved shape along the concave curved edge, and the plurality of elastic members in each of the two leg surrounding portions are arranged. The arrangement interval of the elastic members is the largest at the central portion in the longitudinal direction of the elastic member, and is gradually narrowed from the central portion to both end portions.

(Example) An example of the wearing article according to the present invention will be described below with reference to the drawings.

FIG. 1 shows a perspective view of the wearing article 1. The article 1 has a leg surrounding part 2 and a waist surrounding part 3, each of which has an elastic member 4, 5.
Is attached.

FIG. 2 shows an exploded perspective view of the article 1. The article 1 includes a vertical / horizontal stretch / water permeable top sheet 6, a vertical / horizontal stretch / water impervious back sheet 7, a mat or sheet-like water absorbent core 8, and elastic members 4 and 5 for the leg surrounding portion and the waist surrounding portion. It consists of: Area 10 before and after top and back sheets 6,7,
11 are located on both side edges of the inseam section 12 located between
Is formed on the concave curved edge 13. The elastic member 4 for the leg surrounding part is
A hot-melt adhesive area 14 formed of a plurality of thread-like elastic materials and applied to the inner surface of the back sheet 7 along the shape of the concave curved edge 13 of the back sheet 7 in a state of being stretched at a given magnification.
Is fixed in a concave shape. The elastic member 5 for the waist portion is made of a tape-like elastic material, and hot melt applied to the inner surface of the back sheet along each end of the front and rear regions 10 and 11 of the back sheet 7 as the waist portion 3. Mold adhesive area (not shown)
Or with a hot melt adhesive (not shown) applied to the elastic member 5 itself along each end thereof.

FIG. 3 is a plan view showing an example of attaching each elastic member 4 to the continuous back sheet 7. While moving the continuous backsheet 7 at a given speed in its length direction, on the opposite side along the length direction of the upper surface (inner surface) of the continuous backsheet 7, at a predetermined interval in the length direction, and The adhesive area 14 is provided on the upper surface of the continuous backsheet 7 that curves inward, leaving an uncoated portion 15 on the side edge of the continuous backsheet 7.

On the other hand, a plurality of continuous elastic members 4 are
While moving and extending in the same direction as the first and second
The traverse (not shown) is inserted and supported in a plurality of guide holes arranged in parallel in the elastic member insertion support portions provided near the tip of the traverse (not shown).

The arrangement interval of a plurality of (three in this embodiment) guide holes in each of the insertion support portions of the first and second traverses is determined by the lengthwise center portion (third portion) of the elastic member 4 described in FIG. (See the portion indicated by reference numeral 4a in the figure). The first and second traverse, respectively, from the starting position P ₁ on the continuous backsheet 7 to folding line P _2, only the width W from the folding line P ₂ to the starting position P _1,
The continuous back sheet 7 is reciprocated at right angles to the opposite side area.

The arrangement interval of the first and second traverse of said plurality of continuous elastic member 4 is inserted and supported in the guide hole of the insertion support portion, when the respective insert support portion is located in the starting position P ₁ is
The guide holes are kept at the same interval, and in that state, a part of each continuous elastic member 4 (see the portion indicated by reference numeral 4a in FIG. 3).
Although but is adhered to the adhesive region 14, gradually narrows with the respective insertion support portion moves from the starting position P ₁ to the folding line P _2, in that state, a portion of each continuous elastic members 4 and the adhesive Is adhered to the adhesive area 14.

Also, each successive elastic member 4, the elongation due to the moving slightly higher from the insertion support portion starting position P ₁ to the folding line P _2, resulting, elongation of the continuous elastic member 4,
It is lowest at the portion 4a shown in FIG. 3, and gradually increases from this portion 4a to the portion 4b. This means that the traverse forcibly changes the direction of each continuous elastic member 4 extending at a given stretching magnification and running linearly along the length of the continuous backsheet 7 to the side of the backsheet 7. , the continuous elastic member 4 by resistance when it is because is elongated with the movement from the respective starting position P ₁ to the folding line P _2.
However, this depends on the running speed in the length direction of each continuous elastic member 4 and the moving speed of the traverse in the lateral direction. When the said starting position and the folding line of the respective insertion supporting portion in the opposite, ie, the starting position of the folding line P _2,
If the starting position P ₁ and the folding line, the stretch ratio of slightly higher due to the elastic member 4 is moved from the position P ₂ to the position P _1, as a result, elongation of the continuous elastic member 4, Part
It is highest at 4a and gradually lowers from this site 4a to site 4b.

The unbonded portion 4c of each continuous elastic member 4 instantaneously draws a curved trajectory as shown in FIG. 3 depending on the position of the traverse, but contracts immediately after passing through the traverse and contracts to form the continuous backsheet 7. Is parallel to the side edge along the length direction.

In order to make the continuous elastic member 4 supported by the traverse follow the curved shape of the adhesive region 14 on the continuous back sheet 7, the traverse may be controlled by a cam mechanism.

As shown in FIG. 3, each elastic member 5 is formed of one piece, and after or before the continuous elastic member 4 is bonded to the upper surface of the continuous back sheet 7, the continuous back sheet 7 is formed.
Under the elongation so as to be located at a given position in the longitudinal direction of the upper surface of the continuous backsheet 7, on the hot-melt type adhesive area (not shown) applied to the upper surface of the continuous backsheet 7, or on the elastic member 5 itself. Hot-melt type adhesive (not shown)
Fix with. Of course, each elastic member 5 is
It is also possible to use one composed of a plurality of pieces as shown in FIG.

Although not shown, the core 8 is on the upper surface of the continuous backsheet 7, between the continuous elastic members 4 facing the continuous backsheet 7 in the lateral direction, and in the length direction of the continuous backsheet 7. It is disposed between the opposing elastic members 5 with or without a hot melt type adhesive.

As the top sheet 6, in the manufacturing process of the article shown in FIG. 3, a continuous sheet is used, and the upper surface of the continuous back sheet 7 in which the cores 8 are intermittently arranged is bonded to the lower surface (inner surface) by hot melt type bonding. The continuous topsheet coated with the agent intermittently is covered and joined to form a continuous laminate.

In FIG. 3, the continuous laminate constitutes a unit laminate to be made into an individual article by cutting the elastic member 5 along a virtual imaginary line 16 bisecting the length of the continuous laminate in the longitudinal direction. I do. By this cutting, the unbonded portion 4c of each continuous elastic member 4 is contracted.

The unit laminated body is formed into the article 1 shown in FIG. 1 by folding the unit laminated body in the length direction at the center thereof and joining both side edges thereof by heat sealing or sonic sealing means. However, in the present invention, it is not limited to forming the article into pants or briefs,
As described above, the unit laminated body is folded in two in the length direction at the center thereof and the both side edges thereof are not joined by the heat sealing means. A fastening piece such as a pressure-sensitive tape fastener may be attached to both sides of the rear section 11 (see FIG. 2), and the waist portion of the unit laminate (article) may be fastened with the fastening piece.
Further, some articles do not need to have the core 8.

The topsheet 6 is a vertically and horizontally stretchable nonwoven fabric, the backsheet 7 is a water-impermeable elastomer sheet or a laminate of this and a vertically and horizontally stretchable nonwoven fabric, and the core 8 is a mixture of fluff pulp, superabsorbent polymer particles and synthetic fibers. A molded product can be used, and natural rubber, synthetic rubber, or the like can be used for the elastic members 4 and 5, respectively.

(Effect of the Invention) In the article according to the present invention having the above-described configuration, the arrangement interval of the plurality of elastic members in each of the two leg surrounding portions is set at the longitudinal center portion of the elastic member, that is, the crotch of the article. Since it is the widest in the central portions on both sides of the section, the central portions on both sides of the crotch section compress the wearer's skin most widely. For this reason, the compressive force is widely dispersed at the central portions on both sides of the crotch region so as not to cause pain to the wearer at that portion, and excreted liquid is less likely to leak from both side edges of the crotch region of the article.

[Brief description of the drawings]

 FIG. 1 is a perspective view showing an article according to an embodiment of the present invention. FIG. 2 is an exploded perspective view showing the article. FIG. 3 is a plan view showing an example of arrangement of elastic members. 1: Worn article 2: Leg surroundings 4: Elastic member 6: Top sheet 7: Back sheet 12: Inseam area 13: Concave curved edge

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-58-149302 (JP, A) JP-A-2-152450 (JP, A) JP-A-64-68503 (JP, A) (58) Field (Int.Cl. ⁶ , DB name) A41B 13/00 A61F 13/00

Claims (1)

(57) [Claims] 1. A disposable wearing article in which a plurality of elastic members are respectively attached to leg surrounding portions on both sides of a crotch region located between front and rear regions of a top sheet and a back sheet, wherein the both leg surrounding portions have concave curved edges. And the plurality of elastic members are arranged in a concave shape along the concave edge, and the arrangement interval of the plurality of elastic members in each of the two leg surrounding portions is set in the longitudinal direction of the elastic member. The article characterized in that it is widest at a central part and is gradually narrowed from the central part to both end parts.