JP3450989B2 - Disposable wearing articles - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to disposable articles such as disposable diapers, training pants, incontinence pants, and surgical gowns, and more particularly to such articles that are worn using mechanical fasteners.

[0002]

2. Description of the Related Art Conventionally, these articles are sometimes worn by using a mechanical fastener composed of a hook member and a loop member which are disengaged from each other. In the fastener, the hook member may be formed of a relatively rigid plastic, and the other loop member may be formed of a relatively soft non-woven fabric. These members can be joined to the worn article by an adhesive such as a hot melt adhesive or an adhesive.

[0003]

When a non-woven loop member is bonded to the surface of the plastic film forming the article by an adhesive or a pressure-sensitive adhesive, the loop member and the film initially intervene. The adhesive or pressure-sensitive adhesive that has been used may migrate into the nonwoven fabric of the loop member with the passage of time, and the loop member may eventually peel off from the worn article.

Therefore, the present invention has an object to prevent the detachment of the loop member due to such a phenomenon in a disposable wearing article.

[0005]

In order to solve the above-mentioned problems, the present invention is premised on that it has a contact surface and a non-contact surface for skin, and one of these surfaces is engaged with each other. It is a disposable wearing article provided with a mechanical fastener composed of a hook member and a loop member to be removed.

On the above-mentioned premise, the present invention is characterized in that the loop member is made of a non-woven fabric of thermoplastic synthetic fiber, and the fiber ridge region and the fiber are partially melted to lose its shape and become a film shape. And a film-forming portion which is joined to the non-contact surface via a hot-melt adhesive applied to the entire area of the loop member.
Both sides are smoother and more transparent than the fiber ridges.
Higher, in the wearing article, the adhesive is the loop member.
From the non-contact surface having a color tone different from
When viewed, the adhesive in the filmed portion
Because the color tone of the
And the color tone of the adhesive is the fiber ridge area and the film.
It appears in a shaded pattern with the shaped part .

[0007] In a preferred embodiment of the invention, the film Joka portion extends in stripes in the longitudinal direction spaced the wearing article in the transverse direction of the wearing article.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to the accompanying drawings, taking a disposable diaper as an example of a disposable wearing article according to the present invention.

A disposable diaper 1 in a worn state, which is shown in a partially cutaway perspective view in FIG.
And a liquid-impervious back sheet 3, and a liquid-absorbent core 4 interposed between these sheets 2 and 3, and a front waist region 6;
It has a rear waist region 7 and a crotch region 8 located between the both waist regions 6, 7. At the end edge of the rear waistline region 7 and the side edge of the crotch region 8, a waistline elastic member 11 and leg elastic members 12 are provided between the front and back sheets 2 and 3, and both sheets 2 in an expanded state. 3 is joined to at least one inner surface.

In the diaper 1 in a worn state, the front and rear waist regions 6, 7 are connected via a mechanical fastener 16 so as to be separable in the waist direction. Such fastener 16
Is a kind known under the trade name Velcro or Velcro, and includes a hook member 18 extending from the side edge portion 17 of the rear waist region 7 in the waist direction and the back sheet 3 of the front waist region 6. The loop member 19 is joined to the outer surface. A nonwoven fabric or a perforated plastic film is used for the topsheet 2, and a plastic film is used for the backsheet 3. For the core 4, crushed pulp or a mixture of crushed pulp and a super absorbent polymer is used.

FIG. 2 is a sectional view of the principal part taken along the line II-II of FIG. The illustrated hook member 18 is molded from polyethylene resin, polypropylene resin, or the like, and is composed of a panel portion 21 and a large number of hook elements 22 that integrally project from the panel portion 21. The panel portion 21 is joined to the side edge portion 17 of the rear waistline region 7 on at least a part of the back surface 23 opposite to the surface from which the hook element 22 projects.

FIG. 3 is a sectional view taken along line III-III of FIG. The illustrated loop member 19 is made of a nonwoven fabric made of thermoplastic synthetic fiber, and the fiber raised area 26 in which the fibers are raised to form a large number of loop elements 26A.
And a portion 27 in which the fiber is intermittently heated and pressed to lose its original shape and is formed into a film, and is joined to the outer surface of the backsheet 3 via a hot melt adhesive or pressure sensitive adhesive 28. . As shown in FIG. 1, the film-like portion 27 is separated from the article 1 in the lateral direction at regular intervals and extends in the longitudinal direction of the article 1 in a striped pattern. The width dimension of the portion 27 is 0.5 to 8 m.
It is preferable that it is m in order to obtain the desired effect.
The loop member 19 is at least in some of the filmed portions 27, preferably the filmized portions 27.
And the fiber raised area 26 are joined to the back sheet 3.

The non-woven fabric to be the loop member 19 is preferably a synthetic fiber having a fiber length of 30 mm or more, which is made of a resin such as polyethylene, polypropylene, nylon, polyester or the like, which is preferably uncolored or colored in an extremely light color, or a resin of these A non-woven fabric made of a plurality of composite fibers and having a large number of loop elements 26A capable of engaging and disengaging the hook elements 22 is used. A bulky nonwoven fabric obtained by heating and crimping core-sheath type composite fibers of polyethylene and polypropylene and side-by-side type composite fibers is an example suitable for the member 19. As the structure of such a nonwoven fabric, fibers may be fused or mechanically entangled with each other, and the loop element 26A may be substantially formed between the fusion or the entanglement.

In these non-woven fabrics, the portion which is locally heated to the softening temperature or melting temperature of the resin and pressed is the film-forming portion 27. In the film-like portion 27, both surfaces are smooth, and the transparency is higher than that of the fiber raised region 26. For example, the color of the adhesive 28 colored in a bright color different from the surrounding color is particularly dark here. appear. Therefore, when the diaper 1 of FIG. 1 is viewed from the front, the color of the adhesive 28 seen through the fiber raised region 26 and the film-shaped portion 27 has a shaded pattern. In this way, if the color tone of the adhesive 28 for joining the loop member 19 is particularly noticeable at the film-shaped portion 27, it becomes easy to know the existence of the loop member 19 by the color tone. That is, the film-shaped portion 27 serves not only as a marker for facilitating visual recognition of the counterpart loop member 19 with which the hook member 18 is engaged, but also as a hook member 18.
Of the loop member 19 serves as an indicator for engaging and positioning the loop member 19. The film-like portion 27 also has a function of preventing the loop element 26A from being easily lifted up or pulled out from the nonwoven fabric base even when the loop element 26A is pulled by the hook element 22 engaged with the loop element 26A.

In such a diaper 1, the adhesive 28 for joining the loop member 19 has the fiber raised area 26 of the member 19.
Since it has moved to the inside, the loop member 19 becomes
Even if the bonding force with respect to the back sheet 3 in 6 is lost, such a transfer of the adhesive 28 does not occur in the film-shaped portion 27, so the bonding force is not lost. Therefore, the loop member 19 does not peel off from the back sheet 3.

In addition to the disposable diaper shown in the drawings, the present invention can be implemented in disposable training pants, incontinence pants, surgical wear, and other worn articles.

[0017]

According to the disposable wearing article of the present invention, the adhesive or pressure-sensitive adhesive for joining the loop member to the wearing article may migrate into the fiber ridge area of the loop member. , It does not migrate in the film-shaped part. Therefore, there is no risk of the loop member peeling from the worn article due to migration of the adhesive.

Further, in this loop member, when the film-shaped portion has a higher transparency than the fiber raised area, the color of the adhesive appears on the loop member as a shade pattern, so that the hook is formed. When the members are engaged with each other, it is possible to easily visually recognize the existence of the counterpart loop member, and it is possible to use the hook member as an engagement positioning for the loop member. .

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing a worn state of a disposable diaper.

FIG. 2 is a schematic cross-sectional view of the hook member taken along the line II-II in FIG.

FIG. 3 is a schematic cross-sectional view of the loop member taken along the line III-III in FIG.

[Explanation of symbols]

1 Worn articles (diapers) 2 Contact surface against skin (top sheet) 3 Non-contact surface against skin (back sheet) 16 Fasteners 18 Hook member 19 Loop member 26 Fiber uplift area 27 Filmized part 28 Adhesive

─────────────────────────────────────────────────── --- Continuation of the front page (56) References JP-A-9-38139 (JP, A) JP-A-2-18036 (JP, A) JP-A-1-168901 (JP, A) JP-A-9- 317 (JP, A) JP-A-9-262110 (JP, A) JP-A-6-507800 (JP, A) US Patent 3694867 (US, A) Registered utility model 3033448 (JP, U) (58) Field (Int.Cl. ⁷ , DB name) A61F 5/44 A61F 13/56

Claims (2)

(57) [Claims] 1. A contact surface and a non-contact surface for the skin,
Hook members and levers that engage or disengage from each other on any of these surfaces
Guides with mechanical fasteners
In abandoned worn articles, The loop memberIsMade of non-woven fabric of thermoplastic synthetic fiber
The fiber ridge area and the fibers partially melt and form
And has a film-shaped portion,The loop
Hot melt applied all over the materialBefore through the glue
Bonded to the non-contact surface, The film-shaped part is
The surface is smooth and more transparent than the fiber ridge area, In the wearing article, the adhesive is different from the loop member.
When the article is viewed from the non-contact surface,
In addition, the color tone of the adhesive in the film-shaped portion
By appearing darker than the fiber ridge area, the adhesion
The color tone of the agent depends on the fiber raised area and the film-like portion.
It appears as a shade pattern Said wear characterized by
For goods. Wherein said film Joka portion, wearing article according to claim 1, spaced apart in the transverse direction of the wearing article and extends in stripes in the longitudinal direction of the wearing article.