JP2898533B2 - Disposable pants - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to disposable trousers formed with pants on both right and left sides. It is related to disposable pants designed to be dismantled.

[0002]

2. Description of the Related Art FIG. 3 is an explanatory front view showing an example of disposable pants. The disposable pants 1 has a trunk opening 5 upward.
However, a pair of leg openings 6 and 6 are formed below, and a thread-like or band-like elastic body (made of natural rubber or synthetic rubber) 8a, 8c is provided around these to provide waist gathers and legs. Gathers are formed. Further, another elastic body 8b may be provided in the lateral direction between the waist gather and the leg gather in order to enhance the adhesion around the trunk.

A general disposable pants 1 is constituted by a sheet laminate comprising a liquid-impermeable back sheet 2, an absorber 4 and a liquid-permeable top sheet 3. The disposable pants 1 are provided on both left and right sides thereof with joints 9 for joining the front and rear sheet laminates. That is, both sides of the sheet laminate folded in front and rear in the manufacturing process are joined along the side edge by means such as heat welding, ultrasonic heating, high frequency heating, adhesive bonding, and the like. Form.

[0004] The disposable pants described above are generally used not only for adults, but also for toddlers who can walk around 12 to 36 months when the diaper is separated. The infant at this time moves actively, and if the bonding strength at the joint 9 is weak, the infant may be easily broken. However, on the other hand, if the disposable pants are not promptly taken off after defecation and urination, it will have an adverse effect on early childhood education and the movement of the wearer will cause stool and urine to adhere to extra parts.

[0005] When removing the disposable pants, if the joint portion 9 is peeled off and disassembled into a flat shape, the disposable pants can be taken off without attaching a stool or the like to the feet or the like without leaving the wearer standing. Can be. Thus, the joint 9 must meet the conflicting demands that the infant should not be torn even when actively moving, and that the caregiver should easily be able to remove it by hand.

[0006]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a disposable underpants formed with a joint, which is not easily broken by the movement of a wearer, and that a caregiver or the like after use has a large size. An object of the present invention is to provide a disposable pants having a joint that can be disassembled without requiring force.

[0007]

According to the disposable pants of the present invention which has achieved the above object, the sheet laminate including the absorber is folded back and forth, and the right and left sides thereof are joined along the side edge. A disposable pant having a joint formed thereon, the joint comprising a plurality of horizontal adhesive lines and one or more vertical adhesive lines formed by heat sealing, wherein the horizontal adhesive lines are intermittent in the vertical direction. It is arranged in one or two rows, and has a gist in that the vertical bonding line is provided so as to contact or cross at least one of the horizontal bonding lines.

A structure in which the vertical bonding line contacts or intersects only at the upper end and / or lower end of the horizontal bonding line, or the vertical bonding line contacts all of the horizontal bonding lines. Is a preferred embodiment of the present invention. In addition, these vertical bonding lines
Either the configuration provided on the outside of the horizontal bonding line or the configuration provided on the inside can be adopted.

[0009]

The joint at both sides of the disposable pants according to the present invention is composed of a plurality of horizontal adhesive lines intermittently arranged in one or two rows in the vertical direction and one or more vertical adhesive lines. However, it has the greatest features. Even if the structure of the joining line where the horizontal adhesive line is intermittently arranged in the vertical direction is adopted,
In the absence of the vertical bonding line, the bonding strength is weak, and particularly the waist opening and the upper and lower joints corresponding to the leg opening are easily broken when wearing or wearing disposable pants.

In the present invention, since the vertical bonding line is provided so as to contact or intersect at least one of the horizontal bonding lines, the vertical bonding line is not affected by any external force acting on the pants in both the horizontal and vertical directions. Demonstrates excellent proof stress. That is, the external force acting on the pants at the time of wearing or during wearing is mainly a lateral force for pushing the disposable pants outward, and the vertical adhesive line effectively works on this force to cause the pants to act. Prevents easy tearing. However, if a force is applied to both the horizontal bonding line and the vertical bonding line from an oblique direction, these can be peeled off with a relatively small force, so that they can be easily disassembled.

By providing the vertical bonding lines at the upper end and / or lower end except for the middle of the horizontal bonding line, the upper and lower portions of the bonding portion where external force is likely to act first are reinforced. Peeling during and during wearing can be effectively prevented. Of course, the vertical bonding lines may be in contact with or intersect with all the horizontal bonding lines. At this time, since the joining strength is increased, it is recommended to target the wearer in the late childhood where the movement is severe.

If the vertical bonding line is disposed outside the horizontal bonding line row (corresponding to the left and right side edges of the pants), the caregiver puts a finger inside the pants to disassemble the pants. , Can be easily peeled off from the horizontal adhesive line perpendicular to each other by the diagonal force to the vertical adhesive line,
Easy to dismantle. On the other hand, when the vertical bonding lines are arranged inside the horizontal bonding line, the caregiver may disassemble the pants while pinching the side edges of the pants.

[0013]

FIG. 1 is a partially cutaway explanatory view showing an embodiment of the present invention, showing the left side of a disposable pants 1, and the structure of the disposable pants is the same as that shown in FIG. Of course, the structure of the disposable pants is not limited to the one shown in FIG. 3, but the outermost backsheet has a two-layer structure made of a nonwoven fabric with a soft touch, and an elastic body is arranged between the backsheets so that the area is less opaque than the backsheet. A configuration in which a laminated absorber composed of a liquid sheet, an absorber, and a liquid permeable sheet is provided inside the back sheet may be used. In the case of this configuration, the air permeability on both sides is improved.

The joining portion 9 is composed of a vertical bonding line 12 formed by heat sealing and a plurality of horizontal bonding lines 11 formed by heat sealing. Formed in rows in the vertical direction. The vertical bonding line 12 is the same as the horizontal bonding line 11.
Outside (side edges of the pants), the upper end and the lower end of the horizontal bonding line are formed so as to contact the horizontal bonding line 11. The shape of the vertical bonding line 12 can be an arbitrary shape such as a rectangle, a circle, an ellipse, and a linear shape (including a linear shape, a broken line shape, and a chain shape).

(Experimental example) The size shown in FIG.
20g / m^Two Polypropylene nonwoven fabric N ₁ And basis weight
Is 23g / m^Two Polypropylene nonwoven fabric N_Two 2 each
Was heat-sealed as shown in FIG. At this time, FIG.
As shown in (C), a comparison formed only with the lateral bonding lines 11
Using the example and the vertical bonding line 12 as shown in FIG.
The tensile strength of each of the inventive examples was compared.
Was. Heat sealing is performed under a pressure of 500 kg.
The treatment was performed at 5 ° C. for 1/100 second. In addition, vertical bonding
In the embodiment using the wire together, the horizontal adhesive line and the vertical adhesive line are used.
It is performed under the above-mentioned conditions using separate heat sealing devices. Ma
The tensile test was performed while the width of the 50 mm specimen was broken.
, The highest tensile strength was measured.

The average value of 10 pieces of the test piece was 2.8 kg in the comparative example, whereas the average value was 3.kg in the example.
6 kg, indicating that the product of the present invention was about 30% stronger than the comparative product. It is necessary that the tensile strength of the bonding wire in the disposable pants is 3 kg or more in order to prevent tearing during wearing, and it is preferably 4 kg or less in consideration of the peelability after use.

FIGS. 2A to 2F are partially cutaway explanatory views showing another embodiment of the present invention, and show the left side of disposable pants. (A) is an example in which the vertical bonding lines 12 are formed outside the horizontal bonding lines 11 over the entire area of the horizontal bonding line array, and this structure has the highest strength against external forces in the horizontal and vertical directions. Demonstrate. Therefore, it is suitable for a wearer who moves rapidly. (B) and (C) show examples in which a vertical bonding line 12 is formed inside the horizontal bonding line 11, and these exhibit high proof stress against a force applied in the horizontal direction from inside the pants. .

(D) and (E) show lateral bonding lines 1
Examples in which the longitudinal bonding lines 12 are skewed with respect to 1 are shown, and these exhibit excellent proof stress when an external force is applied from an oblique direction. Further, (F) is a lateral bonding line 1
1 shows an example in which a vertical bonding line 12 is formed so as to penetrate a center portion of a staggered arrangement in which two lines are formed. The effect can be given.

[0019]

According to the present invention, since the disposable pants have a structure in which the horizontal adhesive lines and the vertical adhesive lines are combined, the disposable pants themselves are not broken by the movement of the wearer when worn. Thus, a disposable pants having both the advantages of achieving a high bonding strength and also allowing the caregiver to easily peel off the pants when detached from the wearer after use can be provided.

[Brief description of the drawings]

FIG. 1 is a partially cutaway explanatory view showing an embodiment of the present invention.

FIGS. 2A to 2F are partially cutaway explanatory views showing another embodiment of the present invention.

FIG. 3 is an overall front view showing an example of disposable pants.

FIGS. 4A to 4D are explanatory diagrams showing a test method of an example of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Disposable pants 4 Absorber 5 Body opening 6 Leg opening 9 Joining part 11 Adhesion line in the horizontal direction 12 Adhesion line in the vertical direction

(56) References JP-A-7-213553 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) A61F 13/15 A41B 13/04 A61F 5/44

Claims (5)

(57) [Claims] 1. A two fold to the front and rear sheet laminate including an absorbent body, a disposable pants form the joint by joining along the left and right side portions on the side edges, the joint portion is heat
A plurality of lateral glue lines formed by the seal and 1
The horizontal bonding lines are intermittently arranged in one or two rows in the vertical direction, and the vertical bonding lines contact or cross at least one of the horizontal bonding lines. Disposable pants characterized by being provided so as to do. 2. The disposable pant according to claim 1, wherein the vertical bonding line contacts or intersects only at an upper end and / or a lower end of the horizontal bonding line. 3. The disposable pant according to claim 1, wherein the longitudinal bonding lines contact or intersect all of the horizontal bonding lines. 4. The disposable pants according to claim 1, wherein the vertical bonding line is provided outside the horizontal bonding line. 5. The disposable pants according to claim 1, wherein the vertical bonding line is provided inside the horizontal bonding line.