JPS60215803A - Tape fastener of disposable diaper - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape fastener for disposable diapers. More specifically, the present invention relates to a tape fastener that provides a good fit to the waist portion when wearing a diaper.

The use of pressure sensitive adhesive tapes as a means of securing diapers to the wearer is well known.

Various types of tape fasteners have been proposed in the past. For example, a tape fastener that does not use release paper, as seen in Japanese Patent Publication No. 52-34978, and a tape that can be attached and removed multiple times by stacking three tapes, as seen in Japanese Patent Application Publication No. 55-75608. This has become the mainstream tape fastener for disposable diapers these days.

However, these tape fasteners are only used to secure the diaper to the wearer, and as the wearer moves during wear, a gap is created between the wearer's waist and the diaper, from which urine or feces often leak. Moreover, this is not desirable in terms of appearance. In order to improve these drawbacks, Japanese Patent Application Laid-Open No. 51
It has also been proposed to use an elastic body such as JP-A-68345 or JP-A-58-87303, but the former uses a rubber band and the elastic member is thin, so the pressure area is concentrated in one place. , marks on the skin or redness,
Also, the overlapping portions of the diaper may become misaligned. Also, the appearance is not good. In the latter case, the entire tape fastener exhibits elasticity, and the entire surface is coated with adhesive, so the entire stretched portion adheres to the bank sheet when worn, which reduces the elasticity effect.

Therefore, the inventors of the present invention have worked hard to solve these shortcomings and to obtain a tape fastener that gives elasticity to the waist of disposable diapers, prevents urine and feces from leaking from the waist, and has a good appearance. As a result of research, we have arrived at the present invention.

That is, the present invention provides a non-stretchable first end portion fixed to one end of the disposable diaper, a non-stretchable second end portion secured to the other end of the disposable diaper, and the second end portion of the disposable diaper. a stretchable sheet connecting the first end and the second end;
The present invention provides a tape fastener for a pair of disposable diapers, characterized in that at least a part of the end portion or the overlapping portion of the elastic sheet and the second end portion are not bonded.

In the tape fastener of the present invention, in order to make the most of the stretchability of the stretchable sheet, it is better to have a long stretchable sheet, but if it is too long, there is a risk that the overlapping portion of the diaper may shift when worn. Also, when putting on the diaper, the force to pull the tape is about 500g to 2000g, with an average of 100g.
It is about 0g. Therefore, in order to take advantage of this elasticity and prevent the overlapping parts from shifting as much as possible, the elastic sheet will elongate by 30 to 500% when worn, that is, when a force of 1000 g is applied to the elastic sheet. It is preferred that the length of the sheet is 5 to 70 mm, preferably 10 to 50 mm. Also, if the elasticity of the stretchable sheet is too weak, the desired fit will not be obtained, and if it is too strong, the tape will not stretch much when pulled, and the elasticity will lose its effect.

Therefore, this elastic force is 30% when a force of 1000g is applied.
It should range from ~500% preferably from 100% to 300%. Such a stretchable sheet may be in the form of a film, nonwoven fabric, or woven fabric as long as it exhibits stretchability, but most preferably, it is made of thin urethane fibers made into a nonwoven fabric using the spunbond method. The ones that have a soft texture are the best because they fit softly against the wearer's skin and do not get stuffy.

In addition, the first end fixed to one end of the diaper must be non-stretchable; if it is stretchable, the tape will stretch and the applied thickness of the adhesive will change, resulting in uneven adhesive strength. Also, shearing force is applied from all sides of the tape, making the tape easy to peel off, making it difficult to select an adhesive, which is undesirable. By making the first end non-stretchable, these drawbacks are overcome, and the spreading and elastic stretching effect is also increased during the selection of the adhesive. Similarly, by making the second end non-stretchable, the range of adhesives that can be used to fix the tape to the back of the diaper can be expanded, and the appearance of the adhesive portion can also be improved. The non-stretchable members constituting the first end and the second end may be films or non-woven fabrics as long as they do not exhibit stretchability.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing one embodiment of the tape fastener of the present invention, and FIG. 2 is a sectional view showing another embodiment. These tape fasteners of the present invention have a first end 5 fixed to one end of the disposable diaper l with an adhesive 3, and an adhesive 4 applied to the other end of the disposable diaper to be secured. the second end 6 and the first end 5 and the second end 6
It consists of an elastic sheet 2 that connects the

In the embodiment of FIG. 1, the first end 5 and the second end 6 are bonded to the stretchable sheet 2 only at a portion 7 of their overlap. In the embodiment shown in FIG. 2, the first end 5 and the second end 6 are connected via a line of weakness 8, such as a perforation or a slit, which can be easily separated. The first end 5 and second end 6 are bonded to the elastic sheet 2 only in a portion 7 of the overlapping portion.

The tape fastener of the present invention has a long stretchable part that can be effectively used, and is therefore very effective.

The embodiments of the tape fastener for disposable diapers of the present invention have been described above, but the present invention is not limited to these embodiments and can be modified as desired within the scope of the invention.

[Brief explanation of the drawing]

FIGS. 1 and 2 are sectional views showing embodiments of the tape fastener of the present invention, respectively. 1: Disposable diaper 2: Stretchable sheet 3.4: Adhesive 5: First end 6: Second end 7: Adhesive part 8: Line of weakness Fig. 1 Fig. 2

Claims (1)

[Claims] 1. A non-stretchable first end portion fixed to one end of the disposable diaper, and a non-stretchable second end portion secured to the other end of the disposable diaper. and a stretchable sheet connecting the first end and the second end, wherein at least a portion of the overlapping portion of the first end or the second end and the stretchable sheet is A tape fastener for pair diapers that is not glued. 2. When the elastic sheet is subjected to a force of 1000g,
The tape fastener for a pair diaper according to claim 1, which has an elongation of 30 to 500% and a length of 5 to 70 ml11. 3. The tape fastener for a disposable diaper according to claim 1, wherein the first end and the second end are connected via a line of weakness.