CN101578081B - Heating device - Google Patents

Abstract

The heater (10) has a breathable first surface (13) located on the side close to the wearer's skin, a second surface (14) located on the side away from the wearer's skin, and a A heat generating part (11) disposed between the two surfaces. On the outer surface of the second surface (14), an adhesive part (16) for fixing the heater (10) on the clothes is arranged. Furthermore, the first surface (13) is composed of a nonwoven fabric (13b) having concavo-convex shapes on the surface. The nonwoven fabric (13b) has a first fibrous layer (21) comprising one face and a second fibrous layer (22) comprising the other face, the two layers (21, 22) are partially bonded, and the first fibrous layer (21 ) side is formed with a large number of convex portions (24) and concave portions (25), and the one surface is used as the first surface (13).

Description

Heater

technical field

The present invention relates to a heater for body warming, in particular to a heater for relieving menstrual pain. the

Background technique

Various heaters are known that enclose a heat-generating material in an air-permeable flat bag, and use the heat generated by the heat-generating material to heat the body. For example, the present applicant has proposed a portable body warmer, which has a body of the body made of a surface layer, a back layer, and a heating element interposed between the surface layer and the back layer; A fixing piece provided on the body of the body heater so that the upper edge of the body of the body heater extends to the outer surface and is attached to shorts (underwear) (refer to Patent Document 1). Adhesive is applied to the body of the body warmer and the fixing piece, and the body of the body warmer is attached to the outer surface of the shorts by using the adhesive, and the fixing piece is folded into the inner surface of the shorts in a manner of crossing the opening of the shorts and attached to the inner surface. Therefore, there is a limitation that the attachment position of the body warmer is in the vicinity of the opening of the shorts. Furthermore, the heat generated from the body heater is indirectly applied to the body through the fabric of the shorts. Therefore, since there are various types of cloth for shorts, the degree of heat transfer varies depending on the type of shorts. the

In addition to this portable body warmer, a heated body pad for relieving menstrual pain has also been proposed (see Patent Document 2). This heating body pad includes a plurality of heat cells with a heating material enclosed between two layers, and includes a first surface having oxygen permeability and a second surface that directly contacts the user's body. In this body liner, an adhesive attaching mechanism for detachably attaching the body liner is provided on the oxygen-permeable first surface. The mounting mechanism is provided over the entire area of the first surface. The body pad is mounted on the inner side of the shorts by this mounting mechanism. The adhesive mounting mechanism is provided on the entire area of the first surface. Therefore, in this body liner, for example, if it is mounted on the shorts with a part of the body liner exposed from the waist opening of the shorts, Then the adhesive mounting mechanism existing on the exposed portion contacts and adheres to clothing other than shorts. Also, even with the body pad installed in place within the underpants, pubic hair tends to stick to the adhesive mounting mechanism during installation and/or removal of the body pad. Furthermore, when attaching and/or removing the body liner, the wearer's fingers tend to stick to the adhesive attaching mechanism, resulting in poor operability. Moreover, since the body pad is used in such a way that its second surface is in direct contact with the user's body, the heat transfer is direct heat transfer, however, the uneven feeling caused by a large number of heat cells is directly transmitted. For the body, therefore, it cannot be said that the wearing feeling is good. the

For a heater with an adhesive mounting mechanism, in addition to the body pad described in Patent Document 2, it is also proposed to house the heating composition in a flat sheet with an air-permeable adhesive surface and a non-adhesive surface. The heating bag in the shape bag (referring to patent document 3). The heating pack is intended to be fixed to the underwear between the underwear and the skin by attaching the air-permeable adhesive surface of the heating bag to the inner side of the underwear, whereby the air-permeable adhesive surface faces the outside of the human body, thereby maintaining Stable breathable state, and bring the non-adhesive side in contact with the skin to directly heat the human body. On the air-permeable adhesive surface of the heating bag, the adhesive is printed or coated in a uniformly dispersed manner. Therefore, this heating pack has the same inconvenience as that of the body pad described in Patent Document 2 mentioned above. In addition, in this heating bag, the air-permeable adhesive surface that is the air inflow surface faces the underwear, and therefore, air may not be sufficiently supplied depending on the type of cloth for the underwear. Furthermore, if the application area of the adhesive is controlled in order to ensure air permeability, sufficient adhesive force may not be obtained. the

Patent Document 1: JP11-155895A

Patent Document 2: WO98/29063A1

Patent Document 3: JP2001-198150A

Contents of the invention

The present invention provides a heater which has a first face which is located close to the skin of the wearer and has air permeability, a second face which is located on the side away from the skin of the wearer, and is provided on the first face. The heater of the heat generating part between the first surface and the second surface is provided with an adhesive portion for fixing the heater on the clothing on the outer surface of the second surface, and the first surface is made of The nonwoven fabric is composed of a first fiber layer including one surface and a second fiber layer including the other surface, the two layers are partially bonded, and a large number of protrusions and In the concave portion, the one surface is used as the first surface. the

Furthermore, the present invention provides a heater comprising a first air-permeable surface on the side close to the wearer's skin, a second surface on the side away from the wearer's skin, and a The heat generating part between the first surface and the second surface has an upper edge and a lower edge extending in the transverse direction X and left and right side edges extending in the longitudinal direction Y, and has a shape longer in the transverse direction X,

An adhesive portion for fixing the heater on the clothing is provided on the outer surface of the second surface,

The bonding portion is provided on an area other than the central strip-shaped region A, the upper strip-shaped region B, and the lower strip-shaped region C, wherein the central strip-shaped region A extends along the longitudinal direction Y of the heater. The center line _CL extends in the longitudinal direction Y and reaches the upper and lower edges, the upper strip-shaped region B extends in the transverse direction X along the upper edge and reaches the left and right side edges, and the lower strip-shaped region C extends from the center position of the lower edge It extends to the left and right side edges in the transverse direction X along the lower edge.

Furthermore, the present invention provides a method for using the heater, and the method for using the heater is as follows:

Press the first side with your thumb, and use other fingers to grasp the heater along the central belt-shaped area opposite to the shorts, and attach the heater to the inner surface of the front side panel of the shorts,

When removing the heater, insert fingers other than the thumb between the heater and the shorts along the central strip, press the first side with the thumb, grasp and remove the heater with the thumb and other fingers device. the

Description of drawings

Fig. 1 (a) is a plan view seen from the skin contacting surface side of a steam heater as an embodiment of the heater of the present invention, and Fig. 1 (b) is a plan view seen from the clothing contacting surface side. the

Fig. 2 is a sectional view along line II-II of Fig. 1 . the

Fig. 3 (a) is the perspective view showing the enlarged main part of the nonwoven fabric used in the steam heater shown in Fig. 1, and Fig. 3 (b) is a longitudinal view showing the enlarged main part of the nonwoven fabric Sectional view. the

Fig. 4 is an explanatory view showing a state in which the steam heater shown in Fig. 1 is fixed to shorts. the

Fig. 5 is an explanatory view showing a method of measuring the angle formed by the lower edge of the steam heater shown in Fig. 1 and the horizontal line. the

Fig. 6 is a diagram showing an instrument for measuring the air permeation capacity in the horizontal direction of the first nonwoven fabric. the

Fig. 7 is a diagram showing an apparatus for measuring the air permeation capacity in the horizontal direction of the first nonwoven fabric. the

Fig. 8 is a plan view (corresponding to Fig. 1(b) ) of a steam heater as a second embodiment of the heat generator of the present invention seen from the clothing contact surface side. the

9( a ) and ( b ) are plan views showing other examples of the steam heater shown in FIG. 8 (corresponding to FIG. 1( b )). the

Fig. 10 is a plan view (corresponding to Fig. 1(b) ) of a steam heater as a third embodiment of a heater according to the present invention seen from the clothing contact surface side. the

Fig. 11 is a plan view (corresponding to Fig. 1(b) ) of a steam heater as a fourth embodiment of a heater according to the present invention seen from the clothing contact surface side. the

12( a ) is a graph showing the RI value of the uterine artery of the test subject before and after using the steam heater obtained in the example, and FIG. 12( b ) is a graph showing the amount of change in the RI value. the

Fig. 13 is a graph showing the skin temperature in a state where the steam heater obtained in Examples is attached to the wearer's skin. the

Detailed ways

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Fig. 1 (a) shows the plan view that sees as one embodiment of the steam heater of the heater of the present invention from the skin contact surface side, and Fig. 1 (b) sees this steam heater from the clothing contact surface side floor plan. Fig. 2 is a sectional view along line II-II of Fig. 1(a). the

The steam heater 10 of the present embodiment is a heater for improving the physiological functions of the wearer by using steam heated to a predetermined temperature generated from a heat generating part included in the wearer's body. In particular, the steam heater 10 of this embodiment is suitable for relieving menstrual pain by applying steam heated to a predetermined temperature to the lower abdomen of a woman. the

The steam heater 10 has a transverse direction X and a longitudinal direction Y perpendicular thereto, and has a long shape along the transverse direction X. The steam heater 10 has an upper edge 10a and a lower edge 10b extending in the horizontal direction X, and left and right side edges 10c, 10d extending in the longitudinal direction Y. As shown in FIG. The upper edge 10a is in a curved shape facing inwardly convex toward the center line L extending in the transverse direction X of the steam heater 10. The lower edge 10b is a curved shape in a shape convex outward with respect to the center line L extending in the lateral direction X. As shown in FIG. The left and right side edges 10c, 10d are curved shapes respectively in a shape convex outward. Both ends of the upper edge 10a are smoothly connected to the upper ends of the left and right side edges 10c and 10d. Similarly, both ends of the lower edge 10b are smoothly connected to the lower ends of the left and right side edges 10c and 10d. The steam heater 10 has such a smooth profile that it is difficult for the steam heater 10 to feel uncomfortable when it is worn. the

The steam heater 10 includes a heat generating part 11 and a housing body 12 that houses the heat generating part 11 . The housing body 12 has a flat shape and is the outline of the steam heater 10 . The housing body 12 forms a closed space for housing the heat generating unit 11 by laminating a plurality of thin sheets. The container 12 having a flat shape has a first surface 13 on the side closer to the wearer's skin, and a second surface 14 on the opposite side and on the side farther from the user's skin. . the

The heat generating part 11 contains an oxidizing metal. The heat generation part 11 is a part where water vapor heated to a predetermined temperature is generated using heat generated by an oxidation reaction in which an oxidizing metal contacts oxygen. The details of the heat generating unit 11 are as follows. the

The first surface 13 has air permeability through which air and water vapor can pass. On the other hand, the second surface 14 has a lower degree of permeation of air and water vapor than the first surface 13 . That is, compared with the first surface 13, the second surface 14 is less air-permeable or air-impermeable. The second surface 14 is difficult to breathe or is not breathable, and is appropriately selected according to the specific application of the steam heater 10 . the

The steam heater 10 is used such that one side of the first surface 13 is in direct contact with the wearer's skin, and one side of the second surface 14 is in direct contact with clothing (shorts described later in this embodiment). The water vapor generated by the heat generated by the heat generating part 11 passes through the first surface 13 and is directly applied to the wearer's skin as an object. the

Both the first surface 13 and the second surface 14 of the steam heater 10 are made of thin sheets. In addition, the housing body 12 of the steam heater 10 has a closed-shaped peripheral joint portion 15 at its periphery, and the peripheral joint portion 15 is formed by mutually joining the peripheral portions of thin sheets constituting the first surface 13 and the second surface 14. . The peripheral joint portion 15 is continuously formed. The storage body 12 is in a non-joined state with the first surface 13 and the second surface 14 inside the peripheral joint portion 15 . Then, in the housing body 12, a single airtight space for housing the heat generating unit 11 is formed. As shown in FIG. 2 , heat generating unit 11 is housed so as to occupy substantially the entire area of the space formed in housing body 12 . That is, in the housing body 12, a single heat generating portion 11 is accommodated, and the heat generating portion 11 is housed so as to occupy substantially the entire area of the housing body 12 except for the peripheral joint portion 15. In Fig. 2, the heat generating part 11 is individually housed in the closed space of the housing body 12, however, the heat generating part 11 and a part of the inner surface of the housing body 12 may be bonded with an adhesive or the like within the range that does not interfere with heat generation. Knot means for fixation. the

The steam heater 10 of the present embodiment is configured so that water vapor is released preferentially through the first surface 13 by appropriately adjusting the air permeability of the first surface 13 and the second surface 14 . Specifically, the air permeability of the second surface 14 is higher than that of the first surface 13 . Here, the air permeability is a value measured according to JIS P8117, and is defined as the time (sec/100ml) for 100ml of air to pass through an area of ^645mm2 under a certain pressure.

Therefore, when the air permeability is high, it takes a long time for the passage of air, that is, it means that the air permeability is low. Conversely, a small air permeability means high air permeability. In this way, the size of the air permeability and the level of air permeability are expressed as the opposite relationship. In the present embodiment, when the air permeability of the first surface 13 and the second surface 14 is compared, the first surface 13 is higher than the second surface 14 . That is, as described above, the second surface 14 is air-impermeable or hardly air-permeable (that is, it has air permeability, but its air permeability is lower than that of the first surface 13 ). the

The container 12 has a flat shape having a first surface 13 as an air-permeable surface and a second surface 14 as an air-impermeable surface opposite thereto, and is heated by steam through the first surface 13 as an air-permeable surface. Alternatively, the housing body 12 has a flat shape having a first surface 13 as an air-permeable surface and a second surface 14 as a difficult-to-breathable surface opposite thereto, and steam heating occurs through the first surface 13 as an air-permeable surface. When the second surface 14 is difficult to breathe, by balancing the air permeability of the first surface 13 and the second surface 14, air preferentially flows into the container 12 through the second surface 14, and water vapor preferentially escapes through the first surface 13. the

When the second surface 14 is difficult to breathe, from the viewpoint of ensuring the inflow of air through the second surface 14 and suppressing the release of water vapor through the surface 14, the air permeability of the second surface 14 is the first. The air permeability of the surface 13 is 5 times or more, particularly preferably 10 times or more. Alternatively, the ratio of the air permeability of the first surface 13 to the air permeability of the second surface 14 (first surface/second surface) is set to be 0.5 or less, particularly preferably 0.2 or less. Thus, the release of water vapor passing through the second surface 14 can be further reduced, and the release of water vapor passing through the first surface 13 can be further increased. On the other hand, when the second surface 14 is airtight, the inflow of air into the container 12 and the generation of water vapor are exclusively performed through the first surface 13 . the

When the second surface 14 is difficult to breathe, the air permeability of the surface 14 is more than 30000 seconds/100ml, particularly preferably more than 40000 seconds/100ml, especially preferably more than 50000 seconds/100ml. On the other hand, the air permeability of the first surface 13 is 100 to 30,000 seconds/100ml, particularly preferably 1,000 to 20,000 seconds/100ml, regardless of whether the second surface 14 is airtight or difficult to breathe. the

As described above, both the first surface 13 and the second surface 14 of the steam heater 10 are made of thin sheets. It is preferable to use a melt-blown nonwoven fabric or a moisture-permeable film as a sheet material that controls air permeability and prevents powder leakage. A moisture-permeable film is a film obtained by forming a melt-kneaded product containing a thermoplastic resin and an organic or inorganic filler incompatible with the resin into a film and stretching it uniaxially or biaxially. porous structure. Composing a laminated sheet by combining thin sheets having various air permeability and moisture permeability increases the degree of freedom in setting the air permeability of the first surface 13 and the second surface 14 to desired values. the

In this embodiment, as shown in FIG. 2, the 1st surface 13 is comprised from the moisture-permeable sheet 13a and the 1st nonwoven fabric 13b which covers the whole surface of this sheet 13a. Since the air permeability of the 1st nonwoven fabric 13b is sufficiently higher than the air permeability of the moisture-permeable sheet 13a, the air permeability of the 1st surface 13 is determined by the air permeability of the moisture-permeable sheet 13a. On the other hand, the second surface 14 is composed of a sheet 14a and a second nonwoven fabric 14b covering the entire surface of the sheet 14a. The sheet 14a is a moisture-permeable sheet or a moisture-impermeable sheet. When the sheet 14a is a moisture-permeable sheet, the air permeability of the moisture-permeable sheet is lower than that of the moisture-permeable sheet 13a constituting the first surface 13 . the

The moisture-permeable sheet 13a and the first nonwoven fabric 13b constituting the first surface 13 may be joined only at the peripheral joint portion 15, or both may be joined over their entire surfaces. When bonding over the entire surface, both are bonded discontinuously in order not to lose the air permeability of the moisture-permeable sheet 13a. The bonding state of the sheet 14a constituting the second surface 14 and the second nonwoven fabric 14b is also the same. Moreover, in FIG. 2, the first surface 13 and the second surface 14 of the container 12 respectively have two types of sheet structures, however, as long as they have the above-mentioned air permeability function, they may be combined with three or more types. The structure of the flakes. In any case, the surface 13b which is in direct contact with the skin is preferably a sheet having the structure shown below. the

As can be seen from the above description, in the steam heater 10 of the present embodiment, the outer surface of the container 12 is composed of the first nonwoven fabric 13b and the second nonwoven fabric 14b. In addition, since the side of the steam heater 10 that contacts the skin is made of the first nonwoven fabric 13b, the skin contact is good. As a result, even when the steam heater 10 is used in direct contact with the wearer's skin, a good wearing feeling can be obtained. Especially in this embodiment, for the first nonwoven fabric 13b constituting the first surface 13 which is the surface directly in contact with the wearer's skin, since the nonwoven fabric described below is used, the feeling of wearing is changed. In addition, it can achieve various beneficial effects. the

FIG. 3 shows an enlarged view of a main part of the first nonwoven fabric 13b preferably used in the steam heater 10 of the present embodiment. The first nonwoven fabric 13b is a nonwoven fabric having a two-layer structure including a first fiber layer 21 on one surface and a second fiber layer 22 on the other surface. The first fiber layer 21 and the second fiber layer 22 are respectively formed of fiber aggregates, and are laminated and partially bonded to each other. As shown in the figure, the joint portion 23 of the first fiber layer 21 and the second fiber layer 22 is compacted due to heat and/or pressure, and compared with other parts of the first nonwoven fabric 13b, its Less thickness and higher density. Then, on one side of the first fiber layer 21, there are a large number of convex portions 24 dispersedly arranged in a predetermined pattern, and a large number of concave portions 25 formed on the joint portion 23, and through these convex portions 24 and concave portions 25, Concavo-convex shapes are formed on the surface of the first fiber layer 21 of the first nonwoven fabric 13b. Here, as for the concave-convex pattern, as long as it is within the range of achieving a good wearing feeling, in addition to the substantially same dot shape shown in FIG. Combinations of shapes, moreover, can also be formed into random patterns. Inside the convex portion 24 is filled with fibers. One surface of the first fiber layer 21 is used as the first surface 13 as the skin-contacting surface of the steam heater 10 . Furthermore, the surface of the second fiber layer 22 is substantially flat, unlike the surface of the first fiber layer 21 . the

Since the uneven shape is formed on the surface of the first fiber layer 21, when the steam heater 10 is worn, the convex portion 24 mainly contacts the wearer's skin on the surface. In short, the entire area of the surface of the first fiber layer 21 is not in contact with the wearer's skin, but is partially in contact with the point contact by the convex portion 24 . The protrusions 24 are formed of fibers and have a good feeling of cushioning or bulkiness. Therefore, a good wearing feeling can be obtained by using the point contact of the protrusions 24 . On the other hand, in the body heating pad described in the above-mentioned Patent Document 1, since the heat element containing a heat-generating composition such as iron powder has a hard uneven unevenness, the present embodiment cannot be obtained. Good wearing feeling obtained in the steam heater 10. the

Furthermore, according to the steam heater 10 of the present embodiment, the contact area between the steam heater 10 and the wearer's skin is reduced due to the irregular shape of the surface of the first fiber layer 21, and stuffiness hardly occurs during wearing. Furthermore, where the steam heater 10 generates water vapor heated to a predetermined temperature, the convex portion 24 functions as a space separating the steam heater 10 from the wearer's skin, and the generated water vapor is efficiently used in the wearer's body. on the user's skin. And, utilize the function as the space of convex portion 24, form the space that air circulates between wearer's body and steam heater 10, therefore, through the first surface 13 that is as the surface that directly contacts with wearer's body, The inflow of air becomes smooth, and the heat generation and steam generation are stable and continuous. the

From the above viewpoint, the thickness T1 (see FIG. 3( b )) of the convex portion 24 of the first nonwoven fabric 13 b is set to 1 to 30 mm, particularly preferably 1 to 10 mm. And the thickness T2 (refer FIG.3(b)) of the recessed part 25 is set to 0.01-5 mm, Especially preferably, it is set to 0.1-1 mm. And the ratio of T1/T2 is set to 2-50, and it is especially preferable to set it to 2-20. Furthermore, from the same viewpoint, the area ratio of the joint portion 23 to the area of the first nonwoven fabric 13b (the ratio of the area of the joint portion 23 per unit area of the first nonwoven fabric 13b) is preferably 3 to 50. %, more preferably 5 to 35%. The area of the joining portion 23 itself is preferably 0.1 to 5 mm ² , particularly preferably 0.1 to 1 mm ² . The shortest distance between adjacent convex portions 24 (the distance between the center of a convex portion and the center of the adjacent convex portion) is preferably 0.5 to 15 mm, particularly preferably 1 to 10 mm.

The thickness T2 of the recessed part 25 and the substantial thickness T1 of the convex part 24 are measured from the cross-sectional photograph or cross-sectional image of the 1st nonwoven fabric 13b in the unpressurized state. In the present invention, the first nonwoven fabric 13b is cut so as to pass through the apex of the convex portion 24 and the concave portion 25, and the cross-sectional shape is observed using a microscope VH-8000 manufactured by Keyence Corporation, and the thickness of the concave portion 25 is measured. T2 and the substantial thickness T1 of the protrusion 24 . the

The basis weight of the first nonwoven fabric 13b is preferably 20 to 200 g/m ² , particularly preferably 40 to 150 g/m ² . The metering weight is obtained by cutting the first nonwoven fabric 13b into a size of 50 mm×50 mm or more as a measuring piece, measuring the weight of the measuring piece using an electronic scale with a minimum scale of 1 mg, and converting it into a metering weight.

The 1st non-woven fabric 13b, as mentioned above, is composed of aggregates of fibers including the first fiber layer 21 on one side and the second fiber layer 22 on the other side. Therefore, the first non-woven fabric 13b The air permeability of the first surface 13 is sufficiently higher than the air permeability of the moisture-permeable sheet 13a, and the air permeability of the first surface 13 is determined by the air permeability of the moisture-permeable sheet 13a. From the viewpoint of exerting sufficient air permeability, the air permeability (JIS P8117) of the first nonwoven fabric 13b is preferably 0.6 seconds/100ml or less, particularly preferably 0.4 seconds/100ml or less. Furthermore, the lower limit is preferably about 0.3 seconds/100 ml. the

Moreover, the first non-woven fabric 13b has air permeability with respect to the horizontal direction (direction perpendicular to the thickness direction of the sheet) due to the irregular shape of the surface of the first fiber layer 21, and even when a predetermined pressure is passed. It can also maintain its fluidity under pressure. Specifically, the horizontal air permeation capacity of the first nonwoven fabric 13b under a pressure of 50 cN/cm ² is preferably 10 to 500 ml/(cm ² ·sec), particularly preferably 20 to 200 ml/(cm ² ·Second). If the air permeation capacity in the horizontal direction under the pressure of 50 cN/cm ² is 10 ml/(cm ² ·sec) or more, when the steam heater 10 is worn, even if the first non-woven fabric 13b is Even when the wearer's body is pressed against the wearer's body under considerable pressure, air permeability in the horizontal direction can be sufficiently maintained, and the inflow of air with a space between the skin and the skin can be ensured. As a result, the reaction of the heat generating part 11 is not hindered compared with general nonwoven fabrics. That is, in the wearing of the steam heater 10, even when the first nonwoven fabric 13b is significantly pressurized and closely attached to the wearer's body, by sufficiently ensuring The air circulation in the direction perpendicular to the thickness direction of the heat generating part 11 can also allow the air to circulate, and make the heat generation stable and continuous. Therefore, good heat generation can be obtained independently of the air permeability of the second surface 14 . As a result, the area where the adhesive is applied to the second surface 14 can be freely designed without worrying about impeding air permeability. In addition, it is possible to effectively prevent the occurrence of stuffiness during wearing of the steam heater 10 , and to reliably prevent skin problems such as discomfort and itchiness/spots caused by the steam heater 10 .

The air permeation capacity in the horizontal direction under a pressure of 50 cN/cm ² was measured by the following method. First, the thickness T3 of the first nonwoven fabric 13b is measured under a pressure of 50 cN/cm ² . Next, as shown in Figure 6, the first nonwoven fabric 13b is cut into a square shape of 50mm on one side, and the first acrylic plate (size: 50mm× 50 mm x 3 mm) 42 and the second acrylic plate 43 having the same structure as the first acrylic plate 42 except that there is no opening, the surface of the measuring sheet 40 facing the wearer's skin (the surface on which the convex portion 24 exists) and the One side of the first acrylic plate 42 faces each other, and the obtained measurement piece 40 is sandwiched to form a measurement laminate 44 (see FIG. 7 ). As shown in FIG. 7, with one side of the first acrylic plate 42 facing upward, they are installed under the gasket 45 of the Gurley tester (Type B) specified in JIS P8117, and compressed until the measuring piece 40 has a thickness T3 . Next, air was introduced through the opening 41 into the central portion of the measuring piece 40 whose thickness was maintained at T3, and the time required for introducing 300 ml of air was measured. Then, the unit area (1 cm ² ) of the opening 41 x the air introduction amount (ml) per second was calculated as the air permeation capacity in the horizontal direction under a load of 50 cN/cm ² .

Thickness T3 is measured using a KES measuring instrument (for example, Kato Tech Co., Ltd. product name "KES-FR series", model number: "KES-FB3"). The KES measuring device is a testing machine that sandwiches a measuring piece between a pressure plate and a pressure receiving plate, and compresses and deforms the measuring piece in the thickness direction at a constant speed. First, the first non-woven fabric 13b is cut to a predetermined size (larger than the pressure plate), and it is installed on the pressure plate, and then the speed of 1.2mm/min. A pressing plate sandwiches and compresses the measuring piece 40 between the pressing plate and the pressing plate. In the compression process, the distance between the pressing plate and the pressure receiving plate (=thickness of the measuring piece 40) at the time point when the load applied to the measuring piece 40 becomes 50 cN/cm ² is regarded as under the pressure of 50 cN/ ^cm The thickness T3 of the first nonwoven fabric 13b.

As a Gurley tester (Type B) for measuring the air permeation capacity in the horizontal direction, for example, "Gurley Densometer" manufactured by Kumagai Riki Kogyo Co., Ltd. shown in FIG. 7 is mentioned. When using the device of FIG. 7 to compress the laminated body 44 for measurement and introduce air in the compressed state, first, one side of the first acrylic plate 42 faces upward, and the laminated body 44 for measurement is positioned on the side of the device. Below the spacer 45 , the gap between the spacer 45 and the facing surface 47 of the spacer 45 is adjusted so that the measuring piece 40 becomes the target load thickness (thickness T3 ) by rotating the sample fastening handle 46 . In FIGS. 6 and 7 , reference numeral 48 is a silicone plate (hardness 50) having a square opening 49 with a side of 10 mm in the center. In order to prevent the introduced air from leaking out from the edge of the measuring piece 40, reference numeral 48 It exists between the spacer 45 and the 1st acrylic plate 42. Then, the handle 50 is pulled up to pull up the inner cylinder 51 , and after a predetermined amount of air is drawn into the cylinder (outer cylinder 52 ), the inner cylinder 51 is lowered in the outer cylinder 52 . Then, 300 ml of air (the pressure depends on the mass of the inner cylinder) was introduced into the center of the test piece 40 from an air supply port (not shown) at the center of the lower surface of the gasket 45 . Then, the time from the start of air introduction to the end of 300 ml of air introduction was measured, and the air permeation capacity in the horizontal direction under a pressure of 50 cN/cm ² was calculated. In the figure, symbol 53 is an optical sensor, and between these optical optical sensors, a strip-shaped slit plate (with a preset slit point) installed in the inner cylinder passes through, thereby sending a signal to a digital counter , and represent the time numerically.

The constituent fibers of each fiber layer constituting the first nonwoven fabric 13b will be described. The second fiber layer 22 contains three-dimensionally crimped fibers. The three-dimensionally crimped fiber generally exhibits coiled (helical) crimps. The three-dimensionally crimped fibers are preferably latent crimped fibers exhibiting crimps. The second fiber layer 22 may consist only of three-dimensionally crimped fibers, or may contain other fibers. Examples of other fibers include normal thermoplastic fibers, regenerated fibers such as rayon fibers, and natural fibers such as cotton. When other fibers are contained in addition to the three-dimensionally crimped fibers, the blending amount of the other fibers is preferably 1 to 50% by weight, particularly preferably 5 to 30% by weight, based on the entire second fiber layer 22 . On the other hand, examples of the constituent fibers of the first fiber layer 21 include normal thermoplastic fibers, regenerated fibers such as rayon fibers, and natural fibers such as cotton. Furthermore, the first fiber layer 21 may contain three-dimensionally crimped fibers. In particular, it is preferable that the first fiber layer 21 is formed of a thermoplastic polymer material and has substantially no thermal shrinkage, or is formed of fibers that do not thermally shrink below the thermal shrinkage temperature of the latent crimpable fibers, or contains the above-mentioned fibers. . the

A preferable manufacturing method of the 1st nonwoven fabric 13b is as follows. First, fiber aggregates constituting the first fiber layer 21 and the second fiber layer 22 are produced separately. As the fiber aggregate, for example, a web of fiber or a nonwoven fabric can be used. The nonwoven fabric is produced by, for example, an air through method, a hot roll method (heat press method), an air laid method, a melt blown method, or the like. The fibrous web is produced, for example, by card machines. In particular, it is preferable to use a nonwoven fabric or a fiber web for the fiber assembly constituting the first fiber layer 21 and to use a fiber web for the fiber assembly constituting the second fiber layer 22 . the

The fiber web constituting the second fiber layer 22 preferably contains latent crimped fibers. Latent crimped fibers are those that can be handled in the same way as ordinary fibers for nonwoven fabrics before being heated, and exhibit coil-like (helical) three-dimensional crimping when heated at a predetermined temperature and have shrinkage properties. fiber. The latent crimped fiber is formed of, for example, an eccentric core-sheath type composite fiber or a side-by-side type composite fiber composed of two types of thermoplastic polymer materials having different shrinkage rates. As the latent crimping fiber exhibiting three-dimensional crimping by heating, for example, latent crimping fiber CPP (trade name) manufactured by Daiwa Bobo Co., Ltd. can be used. the

Next, the fiber aggregates constituting the first fiber layer 21 are superimposed on the fiber aggregates constituting the second fiber layer 22 , and they are partially bonded in a predetermined pattern. Various methods can be used for joining the two as long as at least the joint portion 23 in which the thickness of the first fiber layer 21 is reduced compared to other portions can be formed. For example, thermal pressing or ultrasonic pressing is preferable. The joining portion 23 may be in the shape of scattered points independent of each other, or may be in the shape of a straight line, a curve (including continuous waves, etc.), a lattice, a zigzag shape, or the like. The shape of each of the joints 23 in the case where the joints 23 are arranged in a scattered point shape can be any shape such as a circle, a triangle, a quadrangle, or the like. In this case, the arrangement pattern of each bonding portion 23 can be, for example, a diamond-shaped lattice as shown in FIG. 3( a ). the

Heat is applied to the bonded first fiber layer 21 and second fiber layer 22 to three-dimensionally crimp the latently crimped fibers contained in the second fiber layer 22 into a coil shape (helical shape). The temperature at which heat is applied is equal to or higher than the temperature at which the latent crimped fibers contained in the second fiber layer 22 start thermally shrinking. To impart heat, for example, a method of blowing hot air through an air-permeable method can be used. By this crimping, the constituent fibers of the second fiber layer 22 located between the joining portions 23 shrink. Then, the second fiber layer 22 shrinks in the in-plane direction. On the other hand, the constituent fibers of the first fiber layer 21 do not shrink. Therefore, the fibers constituting the first fiber layer 21 located between the junctions 23 do not move in the planar direction but move in the thickness direction due to the contraction of the second fiber layer 22 in the in-plane direction. Then, the joint portions 23 bulge, and a large number of convex portions 24 are formed on one side of the first fiber layer 21 . Also, a concave portion 25 is formed between the convex portions 24 , that is, at the position of the engaging portion 23 . In this way, the first nonwoven fabric 13b in which one surface of the first fiber layer 21 has an uneven shape is obtained. the

While the first surface 13 of the steam heater 10 is formed of the first nonwoven fabric 13b having the above configuration, the type of the second nonwoven fabric 14b constituting the second surface 14 is not particularly limited. As the second nonwoven fabric 14b, general materials such as air-permeable nonwoven fabric, thermocompression bonded nonwoven fabric, spunlace (Spunlace) nonwoven fabric, chemically bonded nonwoven fabric, thermally bonded nonwoven fabric, etc. can be used. non-woven fabric. the

Moreover, as the first nonwoven fabric 13b, it is preferable to use a nonwoven fabric having the above-mentioned constitution, however, for the first nonwoven fabric 13b, nonwoven fabrics other than them can also be used, such as air permeable nonwoven fabric, thermal General non-woven fabrics such as pressure-bonded non-woven fabrics, spunlace non-woven fabrics, chemically-bonded non-woven fabrics, thermally bonded non-woven fabrics, etc. the

On the surface of the second nonwoven fabric 14b constituting the second surface 14, an adhesive portion 16 for fixing the steam heater 10 to the wearer's clothing, such as shorts, is provided (see FIG. 1(b)). The adhesive portion 16 is formed by applying or printing an adhesive such as thermoplastic resin, such as acrylic resin, vinyl acetate resin, or olefin resin, on the surface of the second nonwoven fabric 14b. Preferably, these resins are preferably non-residual. The adhesive part 16 may be formed in the whole area|region of the surface of the 2nd nonwoven fabric 14b, and may be formed in part. the

As shown in FIG. 4 , the steam heater 10 is used by being fixed to the inner surface of the shorts 30 by the adhesive portion 16 with the upper edge 10a positioned on the upper side and the lower edge 10b positioned on the lower side. In this state, the lateral direction X of the steam heater 10 coincides with the horizontal direction. The steam heater 10 is directly fixed on the inner surface of the shorts 30, so the steam heater 10 can be fixed at a predetermined position regardless of the shape of the shorts 30 (deep or shallow shape on the crotch). In particular, as shown in the figure, if the fixed position of the steam heater 10 is near the crotch portion 30b of the front side panel 30a of the shorts 30, that is, the position corresponding to the lowermost abdomen, water will be supplied to the wearer's body. Steam has a significant effect of relieving menstrual pain. Generally speaking, the shorts 30 are incised from the front side panel 30a to the crotch portion 30b. Therefore, if the profile of the steam heater 10 is consistent with the incised shape, the steam heater 10 can be fixed in a good adaptability. on the position corresponding to the lowermost abdomen of the wearer. Here, the lower edge 10b of the steam heater 10 has a curved shape protruding outward with respect to a center line L (see FIG. 1( a )) extending in the lateral direction X of the steam heater 10 . the

From the viewpoint of more adaptably fixing the steam heater 10 at a position corresponding to the lowermost abdomen of the wearer, it is preferable that the lower edge 10b and the side edges 10c and 10d have a curved shape as described below. That is, as shown in FIG. 5, a straight line L drawn parallel to the tangent H at a position 20 mm downward from the tangent H at the lowermost position of the lower edge 10b and the longitudinal centerline C of the steam heater 10 Let the intersection point of the steam heater 10 be S, and let the position 45 mm away from the intersection S on the straight line L be T, and let the tangent line of the side edge 10d (10c) of the steam heater 10 be P, and the tangent line will pass through the position T, In this case, the lower edge 10b and the side edges 10c and 10d have a curved shape such that the angle θ formed by the tangent line P and the straight line L is preferably 100 to 150 degrees, particularly 100 to 130 degrees. In connection with this, the length of the steam heater 10 in the X direction (refer to FIG. 1 ) is preferably 120 to 180 mm, particularly preferably 130 to 160 mm, and the length in the Y direction (refer to FIG. 1 ) is preferably 70 to 100 mm, particularly preferably It is 80-90mm. the

According to the steam heater 10 of this embodiment, by installing them as shown in FIG. 4, the heat generated by the water vapor heated to a predetermined temperature is directly applied to the wearer's body, thus effectively relieving Pain. The reason for this is that the heat generated with water vapor conducts heat faster than the heat not generated with water vapor, so that the temperature in the deep part of the human body can be further increased. By raising the temperature in the deep part of the human body, the body temperature center is stimulated via the autonomic nerve, thereby dilating the blood vessels, increasing the blood flow, and raising the peripheral temperature. Therefore, it is considered that the physiological pain is relieved. It is known that especially menstrual pain (primary dysmenorrhea) is caused by excessive contraction of the uterus induced by the secretion of prostaglandins (PG). It is considered that the blood flow is increased by the heating by the steam heater 10, thereby preventing the stagnation of PG in the uterus, thereby alleviating menstrual pain. the

The heat generating part 11 of the steam heater 10 will be described. The heat generating part 11 contains an oxidizing metal, a reaction accelerator, an electrolyte, and water. Such a heat generating portion 11 is formed of, for example, a heat generating sheet or a heat generating powder. When the heat-generating portion 11 is formed of a heat-generating sheet, the heat-generating sheet is preferably a fibrous sheet in a hydrated state containing an oxidizing metal, a reaction accelerator, a fibrous material, an electrolyte, and water. That is, the heat generating sheet is preferably constituted by containing an aqueous electrolyte solution on a formed sheet containing an oxidizing metal, a reaction accelerator, and fibrous materials. Examples of the heat-generating sheet include a sheet-like product obtained by wet papermaking, a laminate formed by sandwiching heat-generating powder between paper and the like, and the like. Such a heat generating sheet can be produced using, for example, the wet papermaking method described in US2005/0000827A1 of the applicant's prior application, or the extrusion method using a die coater. The content of US2005/0000827A1 is incorporated in this specification as a part of this specification. On the other hand, when the heat generating part 11 is formed of heat generating powder, it is preferable that the heat generating powder is constituted by containing an oxidizing metal, a reaction accelerator, a water retaining agent, an electrolyte, and water. Among the heat-generating sheet and the heat-generating powder, it is preferable to use the heat-generating sheet from the viewpoint of utilizing water vapor uniformly regardless of the wearer's posture. Furthermore, compared with the exothermic powder, the exothermic sheet is easier to equalize the temperature distribution of the exotherm, and moreover, it is advantageous in making the supporting ability of the oxidizing metal better. the

When the heat generating portion 11 is formed of a heat generating sheet, the heat generating sheet is configured to contain an oxidizing metal in an amount of preferably 60 to 90% by weight, more preferably 70 to 85% by weight, preferably 5 to 25% by weight, and more preferably Preferably 8 to 15% by weight of the reaction accelerator and preferably 5 to 35% by weight, more preferably 8 to 20% by weight of the fibrous shaped sheet, with respect to 100 parts by weight of the shaped sheet, preferably 30 to 80 parts by weight, more preferably 40 to 70 parts by weight of an aqueous electrolyte solution containing preferably 1 to 15% by weight, more preferably 2 to 10% by weight of an electrolyte. On the other hand, when the heat-generating part 11 is formed of a heat-generating powder, the heat-generating powder is constituted such that it contains preferably 20 to 50% by weight, more preferably 25 to 40% by weight, of an oxidizing metal, preferably 3 to 25% by weight, more preferably 5 to 20% by weight of the reaction accelerator and preferably 3 to 25% by weight, more preferably 5 to 20% by weight of the solid part of the water retaining agent, containing preferably 20 -70 parts by weight, more preferably 30-60 parts by weight, of an aqueous electrolyte solution containing preferably 0.3-10% by weight, more preferably 0.5-5% by weight of electrolyte. As various materials constituting the heat-generating sheet or the heat-generating powder, the same materials as those generally used in this technical field can be used. Furthermore, the materials described in the aforementioned Japanese Patent Laid-Open No. 2003-102761 can be used. the

Before the steam heater 10 of this embodiment is used, its entirety is packaged with an anti-oxidative packaging material (not shown in the figure), and the heat generating part 11 is not in contact with oxygen in the air. As an anti-oxidation material, for example, its oxygen permeability coefficient (ASTM D3985) is preferably 10 cm ³ ·mm/(m ² ·day·Mpa) or less, particularly preferably 2 cm ³ ·mm/(m ² ·day·Mpa) the following. Specifically, a film of ethylene-vinyl alcohol copolymer or polyacrylonitrile, or a film in which ceramics or aluminum is plated on such a film can be mentioned.

On the packaging material, it is preferable to attach an indication that the steam heater 10 relieves menstrual pain. Consumers can know from such an expression that the present invention can achieve the effect of relieving physiological pain that cannot be sufficiently achieved by conventionally known general throw-away warmers. Thus, consumers readily recognize the full value of the improved properties of the present invention. The above-mentioned representation includes, of course, characters, but also all information means such as symbols or graphics that can communicate the improved performance of the present invention to consumers. Also, in said representations, information can be included that the present invention has advantages over other articles of manufacture. Furthermore, in addition to or instead of attaching the above-mentioned indication on the packaging bag, an instruction booklet including the indication may be put into the packaging material together with the steam heater 10 . Alternatively, this indication may be attached to the steam heater 10 itself. the

Next, second to fourth embodiments of the present invention will be described with reference to FIGS. 8 to 11 . Regarding the points that are not particularly described regarding these embodiments, the description related to the above-mentioned first embodiment is used as appropriate. In addition, in FIGS. 8 to 11 , the same components as those in FIGS. 1 to 7 are assigned the same symbols. the

In the steam heater 10 of the second embodiment shown in FIG. 8 , the arrangement positions of the bonding portions 16 a and 16 b are one of the characteristics. Specifically, as shown in FIG. 8, these bonded portions are provided in a central strip-shaped region extending in the longitudinal direction Y along the center line _CL extending in the longitudinal direction Y of the steam heater 10 and reaching the upper and lower edges 10a, 10b. A. The upper band-shaped region B extending along the upper edge 10a in the transverse direction X to the left and right side edges 10c, 10d, and from the center position of the lower edge 10b to the left and right side edges 10c, 10c, 10d extends beyond the lower band-shaped region C.

By not providing an adhesive portion in the central band-shaped region A, when the steam heater 10 is installed on the shorts and/or when it is taken off from the shorts, it is difficult for the user's fingers to attach to the adhesive portion. As a result, the workability of attachment and detachment becomes good. Specifically, for example, when the steam heater 10 is installed on the shorts, press the first surface 13 located on the side close to the skin with the thumb, and use other fingers (such as the middle finger) along the side opposite to the shorts. The central band-shaped region A of the second surface 14 grasps the steam heater 10, so that the steam heater 10 can be attached to the inner surface of the front side panel 30a of the shorts 30 well from end to end. In the case of removing the steam heater 10 from the shorts 30, for example, fingers other than the thumb (for example, the middle finger) are inserted between the steam heater 10 and the shorts 30 along the central band-shaped region A, and then, with a large The first surface 13 on the side close to the skin is held down with the thumb, and the steam heater 10 can be taken off from the head to the tail by grasping the steam heater 10 with the thumb and other fingers. the

By not providing an adhesive portion on the upper belt-shaped region B, even if the wearer mistakenly installs the steam heater 10 in a manner exposed from the waist opening of the shorts 30, since there is no adhesive portion on the exposed portion, Therefore, it is also possible to prevent the adhesive portion from adhering to clothing other than shorts. Furthermore, by having the upper band-shaped region B, when detaching the steam heater 10 from the shorts 30, since there is a gap with the shorts, it is easy to insert fingers, and the steam heater 10 can be detached smoothly from head to toe. the

Furthermore, by not providing the adhesive in the lower band-shaped region C, it is possible to prevent pubic hair from sticking to the adhesive. As mentioned above, if the steam heater 10 is installed near the crotch portion 30b of the front side panel 30a of the shorts 30, the effect of relieving physiological pain by applying water vapor to the wearer's body becomes remarkable. Installing the steam heater 10 in such a position tends to cause the pubic hair to stick to the adhesive. However, such inconvenience can be effectively prevented by not providing an adhesive in the lower belt-shaped region C. the

From the point of view that the above-mentioned effect becomes more remarkable by not providing an adhesive agent in the central strip-shaped region A, the upper strip-shaped region B, and the lower strip-shaped region C, regardless of the size of the steam heater 10, the central strip-shaped region The width A1 of A is preferably 20 mm or more, particularly preferably 20 to 100 mm, particularly preferably 20 to 50 mm. The width B1 of the upper band-shaped region B is preferably 5 to 15 mm, particularly preferably 5 to 10 mm. The width C1 of the lower band-shaped region C is preferably 20 mm or more, particularly preferably 20 to 70 mm, and especially preferably 20 to 50 mm. The length C2 of the lower band-shaped region C is preferably 70 mm or more, particularly preferably 70 to 200 mm, particularly preferably 80 to 150 mm. As shown in FIG. 8 , the ends in the longitudinal direction of the lower band-shaped region C may not reach the left and right side edges 10c, 10d, or may reach them. The size of the steam heater 10 is preferably 50-300 mm in the transverse direction, particularly preferably 100-200 mm, and preferably 50-120 mm in the longitudinal direction, particularly preferably 50-100 mm. the

The area where no adhesive portion is provided on the second surface 14 is as described above, and the area where an adhesive portion is provided is as follows. The bonding portion is roughly divided into a first bonding portion 16a and a second bonding portion 16b, and the first bonding portion 16a extends from the lower end of the upper band-shaped region B to the bottom in the longitudinal direction along the left and right side edges 10c, 10d. A pair is provided on the region of the edge 10b. The second bonding part 16b is located between each first bonding part 16a and the central belt-shaped region A, and extends from the lower end of the upper belt-shaped region B to the upper end of the lower belt-shaped region C in the longitudinal direction. In the area of , there are two pairs arranged symmetrically with respect to the centerline C _L line. The 2nd adhesive part 16b may be the same shape, or may be different. Alternatively, as shown in FIGS. 9( a ) and ( b ), three or more pairs of second adhesive portions 16 b may be provided. If necessary, two or more pairs of second adhesive portions 16b may be provided.

As shown in FIG. 8 and FIGS. 9( a ) and 9 ( b ), the second bonding portion 16 b that is line-symmetrical to the centerline _CL is in the form of stripes extending in the longitudinal direction of the steam heater 10 . Due to such a shape, it is difficult to peel off the steam heater 10 installed on the inner surface of the shorts 30, for example, when putting on and taking off the shorts in the toilet. Moreover, when detaching from the shorts 30, it is easy to peel off. The width of the second bonding portion 16b is preferably 1 to 20 mm, particularly preferably 5 to 10 mm, on the condition that the lateral and vertical lengths of the steam heater 10 are within the aforementioned ranges.

In the third embodiment shown in FIG. 10 , there are a pair of second bonding portions 16b extending in the longitudinal direction Y of the steam heater 10 and having a line symmetry with respect to the center line _CL . The width of the 2nd bonding part 16b is larger than the width of the 2nd bonding part of 2nd Embodiment. The first bonding portion 16a is the same as that of the second embodiment. According to this embodiment, the same effect as that of the second embodiment can be achieved.

In the fourth embodiment shown in FIG. 11 , adhesive portions 16 are formed in all regions other than the central strip-shaped region A, the upper strip-shaped region B, and the lower strip-shaped region C described above. The bonding portions 16 are arranged in a pair line-symmetrically with respect to the center line _CL . According to the present embodiment, the adhesive force between the steam heater 10 and the shorts 30 becomes higher, and the peeling of the steam heater 10 is less likely to occur even if the shorts are put on and taken off repeatedly.

As mentioned above, although the best embodiment of this invention was described, this invention is not limited to the said embodiment. For example, in the second and third embodiments, the second bonding portion 16b is formed symmetrically with respect to the center line _CL extending in the longitudinal direction of the steam heater 10, but each bonding portion 16b does not necessarily have to be formed with respect to The center line C _L is symmetrical. Moreover, the second bonding part 16b may be formed in three or more pairs.

Moreover, in the above-mentioned embodiment, the example of the clothing on which the steam heater 10 is fixed has been described with shorts, but the clothing on which the steam heater 10 is fixed is not limited to shorts, and can be heated according to the desire to use the steam heater. The position of the steam heater can be fixed on various clothes. the

Furthermore, the above-described embodiment is an example in which the heating element of the present invention is applied to a steam heater, but it is known that the present invention can be used as a heating element other than a steam heater, such as a disposable body warmer, without actually being accompanied by water. A heating element that generates heat by generating steam can also be applied in the same manner. the

Example

Hereinafter, the present invention will be described in more detail through examples. However, the scope of the present invention is not limited to these Examples. There is no particular limitation, and "%" and "part" mean "% by weight" and "parts by weight", respectively. the

[Example 1]

(1) Manufacture of heating part

<Preparation of paste>

・Fibrous matter: pulp fiber (NBKP, manufacturer: Fletcher Challenge Canada, trade name: "Mackenzie", CSF140ml) 8%

Oxidizing metals: Iron powder (manufactured by Dowa Iron Powder Mining Co., Ltd., trade name "RKH") 83%

Reaction Accelerator: Activated Carbon (manufactured by Envirochemical Co., Ltd., Japan, trade name "Carboraffin") 9%

With respect to 100 parts of the solid content of the raw material composition (total of fibrous material, oxidizing metal, and reaction accelerator), polyamide-epichlorohydrin resin (manufactured by Starlight PMC Co., Ltd., trade name "WS4020") was added as a cationic coagulant. ”) and 0.18 parts of sodium carboxymethylcellulose (manufactured by Daiichi Kogyo Pharmaceutical Co., Ltd., trade name “HE1500F”) as an anionic flocculant. Furthermore, water (industrial water) was added until the solid content concentration became 12%. the

<Paper making conditions>

The raw material composition was diluted with water to 0.3% directly in front of the papermaking head, and paper was made using an inclined short-wire paper machine at a line speed of 15 m/min to produce a formed sheet in a wet state. the

<Dehydration and drying conditions>

The formed sheet is sandwiched between felts, dehydrated under pressure, passed directly between heated rollers at 140°C, and dried until the moisture content is 5% or less. The basis weight after drying was 450 g/m ² , and the thickness was 0.45 mm. The composition of the shaped sheet thus obtained was measured using a thermogravimetric measuring device (manufactured by Seiko Instruments, TG/DTA6200), and was found to be 83% iron, 9% activated carbon, and 8% pulp.

<Aqueous electrolyte solution>

Electrolyte: refined salt (NaCl)

Water: distilled water

Electrolyte concentration: 5%

<Conditions for adding electrolyte solution>

Three obtained shaped sheets (4.9×10.8 cm) were stacked and immersed in 5% saline corresponding to 45% by weight of the shaped sheet to produce a sheet-shaped heat generating portion. the

(2) Manufacture of container body

A container having the structure shown in FIGS. 1 and 2 was manufactured. As the moisture-permeable sheet 13a, a moisture-permeable polyethylene porous moisture-permeable film (air permeability: 20000 sec/100ml) was used. As the 1st nonwoven fabric 13b, the nonwoven fabric manufactured by the following method is used. The moisture-permeable sheet 13a and the nonwoven fabric 13b are bonded only at their peripheral edge portions, and the portion inside the peripheral edge portion is in a non-joined state. As the sheet 14a, a porous moisture-permeable film made of moisture-permeable polyethylene is used. As the second nonwoven fabric 14b, a polyester-based thermocompression bonded nonwoven fabric (basis weight: 40 g/m ² ) was used. The sheet 14a and the second nonwoven fabric 14b are laminated using a hot melt adhesive. The air permeability of the lamination between the sheet 14a and the second nonwoven fabric 14b was 60000 seconds/100ml. The size of the obtained container: the length in the X direction was 155 mm, and the length in the Y direction was 85 mm. Also, the angle θ shown in FIG. 5 is 120 degrees.

(3) Manufacture of steam heaters

The heat generating part was housed in the obtained container to obtain a steam heater having the structure shown in FIGS. 1 and 2 . This steam heater generates heated steam from the first surface 13 . the

(4) Manufacture of the first nonwoven fabric 13b

(a) Manufacture of the first fiber layer 21

Using the core-sheath composite fiber NBF(H) (trade name: 1.1dtex × 51mm) manufactured by Daiwa Textile Co., Ltd. as a raw material, a cotton web (cardweb) with a basis weight of 10g/ ^m2 was produced by the card method, and it was used as the second 1 fiber layer 21 used. The core-sheath composite fiber is a composite fiber in which polyethylene terephthalate is used as a core component and polyethylene is used as a sheath component.

(b) Manufacture of the second fiber layer 22

Cotton with a basis weight of 20 g/m ² is manufactured using the latent spirally crimped fiber manufactured by Daiwa Bosho Co., Ltd. (trade name "CPP fiber", 2.2 dtex x 51 mm, heat shrinkage start temperature 90°C) as a raw material, using the card method The net is used as the second fiber layer 21.

(c) Manufacture of the first nonwoven fabric 13b

The first fiber layer 21 and the second fiber layer 22 are overlapped and partially bonded by ultrasonic pressure. The bonding portion 23 is circular with a diameter of 1.5 mm ² and forms a pattern as shown in FIG. 3( a ) as a whole. After joining the two, blow hot air at 130°C±10°C for about 1 to 10 minutes through air penetration to crimp the latent crimped fibers of the second fiber layer 22 and shrink the second fiber layer 22, and, The first fiber layer 21 between the joined parts is protruded in a convex shape, and the first nonwoven fabric 13b having a large number of convex parts 24 shown in Fig. 3(a) and (b) is produced. As shown in FIG. 3( b ), the inside of the protruding portion of the first fiber layer 21 is filled with fibers. The obtained first nonwoven fabric 13b had a basis weight of 60 g/m ² , the first fiber layer 21 had a basis weight of 20 g/m ² , and the second fiber layer 22 had a basis weight of 40 g/m ² . Moreover, the thickness T1 of the convex part 24 was 2.0 mm, and the thickness T2 of the concave part 25 was 0.8 mm. The area ratio of the joint portion 23 was 9%. Furthermore, the air permeation capacity in the horizontal direction measured by the method shown in FIGS. 6 and 7 was 140 ml/(cm ² ·sec).

(5) Evaluation

About the obtained steam heater, the relief effect of the menstrual pain was evaluated in the following procedure. Six healthy female college students (mean age 21.9±1.5 years old) were taken as subjects. Among the 6 test subjects, 4 test subjects were persons who were troubled by menstrual pain, and 2 test subjects were persons who were not troubled by menstrual pain. For the subjects, a steam heater was installed on the lower abdomen during the menstrual period. The installation time is 5 hours. Before the installation of the steam heater and 5 hours after the installation, the blood flow velocity of the uterine artery of the test subject was measured using an ultrasonic diagnostic device (Aloka, SSD-3500). According to this device, an arterial blood flow waveform is obtained, and Vmax (maximum blood flow velocity during systole) and Vmin (minimum blood flow velocity during diastole) are obtained from the blood flow waveform. Then, through Vmax and Vmin, the resistance index (Resistance Index) value defined as RI=(Vmax-Vmin)/Vmax is obtained. The RI value is an index reflecting the resistance of peripheral blood vessels, and as the value becomes smaller, it means that blood flows easily. Fig. 12(a) shows the measurement results of the RI value of each test subject before and after use of the steam heater. In addition, the measurement was carried out at 5 to 10 points per test subject, and the average value was calculated. From the results, it was judged that the RI value decreased in 4 of the 6 subjects. The details of the 4 test subjects whose RI value decreased were investigated, and it was determined that all of them were troubled by menstrual pain. That is, the result shown in FIG. 12(b) was judged. Then, the results of the survey were heard, and all four subjects who were troubled by menstrual pain answered that "menstrual pain (lower abdominal pain) was relieved". From the above results, it was judged that when the steam heater of the present invention was applied to a subject suffering from menstrual pain, the RI value decreased, that is, the flow of blood became better, so it was judged that the menstrual pain was relieved. Also, although not shown in the figure, it is not considered that there is a feeling of stuffiness due to the installation of the steam heater, and skin rashes and the like do not occur. the

(6) Evaluation 2

<Measurement of skin temperature>

FIG. 13 shows the temperature of the skin when the obtained steam heater was attached to the inner side of the shorts and used with the heating part located on the lower abdomen. The temperature of the skin in the central part where the heating part is located was measured using a data collection type portable thermometer LT-8 manufactured by Gram Corporation. From the results shown in the figure, it can be judged that the temperature of the skin around 40°C lasted for more than 5 hours. In this measurement, there was no discomfort or stuffiness in the installation of the steam heater. And, when putting on and taking off the shorts once 6-7 hours after heating, no peeling of the steam heater due to putting on and taking off occurred. the

Industrial Utilization Possibility

As described above, the heater of the present invention is composed of a non-woven fabric having unevenness on the surface that comes into direct contact with the wearer's body, and therefore has a good wearing feeling. In addition, since the contact area with the wearer's body is reduced due to the concave-convex shape, stuffiness is less likely to occur. Furthermore, since the concavo-convex shape forms a space for air circulation between the wearer's body and the heater, the inflow of air through the surface directly in contact with the wearer's body becomes smooth, and the heat generation is stable and continuous. . the

Moreover, according to the heater of the present invention, when it is mounted on the inner surface of the shorts or removed, it is possible to prevent the wearer's fingers or pubic hair from sticking to the adhesive portion. Furthermore, even if the heater is installed in such a way that it is exposed from the waist opening of the shorts by mistake, it is possible to prevent the adhesive portion from sticking to other clothing. the

Claims (7)

1. a heating element is characterized in that,

Have near a side of wearer's skin and have the 1st of breathability, away from the 2nd of a side of wearer's skin and be arranged on heating portion between the 1st and the 2nd,

Is provided with at the 2nd outer surface and is used for this heating element is fixed on binding part on the medicated clothing, and the 1st is made of the non-woven fabrics that has concaveconvex shape from the teeth outwards,

This non-woven fabrics has the 1st fibrous layer that comprises a face and the 2nd fibrous layer that comprises another face, two-layerly partly engages, and is formed with a large amount of protuberances and recess in the 1st a fibrolaminar side, with a described face as described the 1st use.

2. heating element according to claim 1 is characterized in that,

Have along the upper limb of laterally X extension and the left and right sides lateral margin of lower edge and Y extension longitudinally, have shape long on horizontal X,

Be provided with at the 2nd outer surface and be used for heating element is fixed on binding part on the medicated clothing,

Described binding part is arranged on the zone except central belt-like zone A, top belt-like zone B and lower tape zone C, and wherein, described central belt-like zone A is along the centrage C that extends on vertical Y of heating element _LExtend on vertical Y and arrive lower edge, described top belt-like zone B extends on horizontal X and arrives left and right sides lateral margin along upper limb, and described lower tape zone C from the center of lower edge along this lower edge on horizontal X to the left and right lateral margin extend.

3. heating element according to claim 2 is characterized in that,

Be provided with:

A pair of the 1st binding part, it is arranged on along left and right sides lateral margin bottom from the top belt-like zone on vertical Y and extends on the zone of lower edge,

A pair of the 2nd above binding part, it is set in place between each the 1st binding part and the central belt-like zone and on the zonal zone of the upper end that extends to the lower tape zone on the vertical Y from the bottom of top belt-like zone.

4. heating element according to claim 2 is characterized in that,

Will be at the intersection point of the vertical centrage C of straight line L that from the position of the downward 20mm of locational tangent line H of the foot that is positioned at described lower edge, draws abreast and heating element as S with this tangent line H, and, will be from this straight line L with this point of intersection S at a distance of the position of 45mm as T, and then, with the tangent line of the lateral margin of heating element as P, described tangent line P is by position T, and at this moment, it is the curve shapes of 100～150 degree that described lower edge and lateral margin have the angle θ that described tangent line P become with described straight line L; The centrage C of described vertical centrage C on vertical Y of heating element, extending _L

5. heating element according to claim 1 is characterized in that,

Compare with the 1st face, the 2nd face is difficult to ventilative or airtight.

6. heating element according to claim 1 is characterized in that,

Heating portion produces the steam that is heated to set point of temperature.

7. a heating element is characterized in that,

Possess near a side of wearer's skin and have the 1st of breathability, away from the 2nd of a side of wearer's skin and be arranged on heating portion between the 1st and the 2nd, and have along the upper limb of laterally X extension and the left and right sides lateral margin of lower edge and Y extension longitudinally, and has shape long on horizontal X

Be provided with at the 2nd outer surface and be used for heating element is fixed on binding part on the medicated clothing,

Described binding part is arranged on the zone except central belt-like zone A, top belt-like zone B and lower tape zone C, and wherein, described central belt-like zone A is along the centrage C that extends on vertical Y of heating element _LExtend on vertical Y and arrive lower edge, described top belt-like zone B extends on horizontal X and arrives left and right sides lateral margin along upper limb, and described lower tape zone C from the center of lower edge along this lower edge on horizontal X to the left and right lateral margin extend.

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