Disposable diaper

Abstract

A disposable diaper which enables a wearer to perceive a temperature change without fail and enables a baby caretaker to perceive a temperature change from the outside easily when body liquids are excreted, in which a temperature change substance is inhibited from shifting or falling-off, and which exhibits a sufficient water absorption capacity and can attain both speedy temperature change and slow temperature change. A disposable diaper comprising a top sheet (11), a back sheet (12), an absorber (13) interposed therebetween, and a temperature change member (31) bearing a temperature change substance (30) which can cause a wearer-perceivable temperature change when comes into contact with body fluids, wherein at least part of the temperature change member (31) is arranged in such a statethat the absorber (13) is absent between the top sheet (11) and the member (31) and between the back sheet (12) and the member (31). Further, the temperature change member (31) is formed by heat-melting partially the particles of the temperature change substance (30) to fix non-molten part of the substance (30) to the temperature change element (31).

Description

technical field [0001] The present invention relates to disposable diapers such as disposable diapers, training pants for infants, or incontinence pads, and more specifically, to a disposable diaper that allows the wearer to sense the occurrence of excretion, especially urine, through temperature changes . Background technique [0002] Disposable diapers generally consist of at least a liquid-permeable top sheet disposed on the surface side, a liquid-impermeable back sheet disposed on the back side, and an absorbent body between these two sheets, and excrement is collected through the top sheet. Absorbed and retained in the absorbent body. [0003] As such a disposable diaper, conventionally known is a training diaper that is configured to cause a temperature change during excretion, and facilitates removal of the diaper by causing the wearer to sense the temperature change. Such a temperature change is manifested by a temperature changing substance that causes a temperatu...

AI Technical Summary

Problems solved by technology

[0008] However, in the absorbent articles described in the aforementioned Patent Documents 1 and 2, even if the temperature change occurs in the temperature change member due to excretion, since the wearer is an infant, it is necessary not only to let the parent feel the temperature change, but also to Parents, etc. need to reconfirm the degree of temperature change

In the case of performing this confirmation, the paper diaper must be taken out every time, which takes time

[0009] In addition, since the temperature change member is formed to be liquid-permeable, there is also a problem that excreted body fluid is temporarily contacted when passing through the temperature change substance, and when the temperature change substance does not sufficiently change the temperature, it is quickly absorbed and held in the absorbent pack. body, does not reliably sense temperature changes even when excretion occurs

[0010] On the other hand, in the absorbent articles described in Patent Documents 1 and 2 above, it is disclosed that the temperature change substance is formed into particles and sandwiched between two layers of sheets, but it is not disclosed whether the temperature change substance is fixed between the layers. , how to fix it in the fixed situation

[0011] That is, in the temperature changing members described in Patent Documents 1 and 2 above, when the temperature changing substance is not fixed, the temperature changing substance sandwiched between the layers moves between the layers without staying there until urine or the like is excreted. Specified parts, which will cause problems such as not being able to reliably sense temperature changes for the wearer

[0012] In addition, even in the case of immobilizing a temperature-changing substance between layers, the immobilization method becomes a problem

As a method of fixing temperature-changing substances, (1) bonding with an adhesive such as hot melt, and (2) pressure bonding by pressure are generally considered, but problems such as the following arise: In the fixing method of (1), sticking The adhesive hinders the contact of the temperature-changing substance and the body fluid, and it is difficult to produce a temperature change (especially when the adhesive is hydrophobic or water-insoluble, its disadvantages are significant); in the fixing method of (2), at least the temperature-changing component configuration Part of the absorber itself hardens into a plate shape, which deteriorates the wearing feeling, or cannot apply sufficient pressure, resulting in insufficient fixing strength

[0015] However, the temperature change element described in the above-mentioned Patent Document 2 increases the chances of contact between the temperature change substance and the body fluid by retaining the body fluid on the upper surface of the liquid-impermeable layer, and can reliably express the temperature change. , causing the inconvenience of hindering the absorption of body fluids into the absorbent core

Images