Sound-reducing stoma appliance

Abstract

To provide a silencing ostomy appliance which suppresses a discharge sound from a stoma even when a gas is evolved in the intestinal tract and which never have a trouble because of bathing or the like.SOLUTION: A silencing ostomy appliance 1 comprises: a face plate 11 made to adhere to the skin around a stoma and having a stoma hole 12 to insert the stoma; a pouch 13 connected to the face plate 11 to accommodate excreta from the stoma; and a sound absorption sheet 20 attached onto the surface of the pouch 13 and having a porous layer. The sound absorption sheet 20 is removably attached onto the outer surface of the pouch 13 opposite from a side where the pouch 13 is connected to the face plate 11.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to an appliance (stoma appliance) that accommodates excrement discharged from an artificial anus (stoma), and relates to a sound-absorbing stoma appliance that can suppress the discharge sound from the stoma even if gas is generated in the intestinal tract. [Background technology]

[0002] A patient who has a stoma created as an artificial anus wears a stoma appliance. In the wearer of the stoma appliance, waste discharged from the stoma is stored in a pouch (bag) of the stoma appliance. This stoma appliance basically comprises a base plate that is attached to the skin around the stoma, and a pouch that is connected to the base plate and stores waste from the stoma.

[0003] Fig. 16 is a diagram showing an example of a conventional stoma appliance, in which Fig. 16(a) is a schematic plan view of the stoma appliance 100 as viewed from the side where it is attached to the human body, and Fig. 16(b) is a schematic plan view of the stoma appliance 100 as viewed from the outside (i.e., the side opposite to the side where it is attached to the human body). Moreover, Fig. 17 is a diagram showing an example of a cross-sectional configuration of the stoma appliance 100 shown in Fig. 16. Here, Fig. 17(a) corresponds to a schematic plan view of Fig. 16(b), and Fig. 17(b) corresponds to a cross-sectional view taken along line ZZ of Fig. 17(a).

[0004] As shown in Figures 16 and 17, the stoma appliance 100 includes a base plate 111 that is adhered to the skin around the stoma, and a pouch 113 that is connected to the base plate 111 and that receives waste from the stoma.

[0005] The base plate 111 has a stoma hole 112 in the approximate center, and the wearer wears the stoma appliance 100 by inserting his or her own stoma into the stoma hole 112. The base plate 111 has an adhesive layer on the surface facing the human body, and the stoma appliance 100 is worn so that no gap is created between the adhesive layer of the base plate 111 and the skin around the stoma.

[0006] The pouch 113 is connected to the base plate 111 so that there is no gap between the pouch 113 and the base plate 111, and contains waste material from the wearer's stoma so that the waste material does not leak from the pouch 113. The pouch 113 has an outlet 114 on its underside (more specifically, on the ground side when a wearer wearing the stoma appliance 100 is standing upright) for discharging the contained excrement from the pouch 113. Except when discharging, this outlet 114 is closed and excrement from the stoma is stored in the pouch 113.

[0007] A clip (closure) is mainly used as a method for closing the outlet 114. For example, the wearer folds the pouch 113 near the outlet 114 and clips it to seal the outlet 114. There are also types in which a cap is provided on the outlet.

[0008] 16 and 17 is a so-called one-piece type stoma appliance in which the base plate 111 and the pouch 113 are integrated together. In addition, there is also a so-called two-piece type stoma appliance in which the base plate and the pouch are separable.

[0009] Here, gas may be generated in the intestinal tract of a person wearing a stoma appliance, and this gas may be discharged from the stoma, emitting a sound (discharge sound). The generation of such discharge sound is extremely disruptive to the wearer in social situations such as meetings, customer service, and concerts, and there is a strong desire to muffle this sound. However, there are no stoma appliances equipped with an effective sound-absorbing mechanism, and the reality is that the only available measures are passive, requiring the wearer to take care with their diet, suppress digestive activity, and make efforts to minimize gas generation.

[0010] For example, a stoma appliance has been proposed in which a sound-absorbing nonwoven material or a sound-absorbing multilayer film is bonded to the outer surface of the pouch of the stoma appliance to form an integrated structure (Patent Document 1). The sound-absorbing nonwoven material contains fibers containing a triblock copolymer containing a polystyrene block and a vinyl-bond-rich rubber midblock. The sound-absorbing multilayer film contains at least one layer containing a triblock copolymer containing a polystyrene block and a vinyl-bond-rich rubber midblock. However, in a stoma appliance with such a configuration, the sound-absorbing material cannot be removed from the stoma appliance, so if the stoma appliance gets wet during bathing, etc., it becomes difficult to remove moisture from the sound-absorbing material, which makes the wearer feel uncomfortable. Furthermore, when the sound-absorbing material contains moisture, its sound-absorbing performance decreases.

[0011] As another example, a sound reduction device in which a proximal thin film and a distal thin film are fixed to a pouch of a stoma appliance has been proposed (Patent Document 2). The thin film is made of a material selected from the group consisting of silicone, polyethylene, polyethylene terephthalate, polypropylene, and PVC. However, although such a thin film has elasticity, it has insufficient sound absorption and sound insulation performance. [Prior art documents] [Patent documents]

[0012] [Patent Document 1] Special Publication No. 2015-503405 [Patent Document 2] Patent No. 6557265 Summary of the Invention [Problem to be solved by the invention]

[0013] The present disclosure has been made in consideration of the above-mentioned circumstances, and aims to provide a sound-reducing stoma appliance that can suppress the sound emitted from the stoma even if gas is generated in the intestinal tract and does not cause any hindrance when bathing, etc. [Means for solving the problem]

[0014] The sound-absorbing stoma appliance of the present disclosure comprises a base plate that is adhered to the skin around the stoma and has a stoma hole for inserting the stoma, a pouch that is connected to the base plate and contains waste from the stoma, and a sound-absorbing sheet that is attached to the surface of the pouch and has a porous layer, wherein the sound-absorbing sheet is removably attached to the outer surface of the pouch opposite the side connected to the base plate.

[0015] In the sound-absorbing stoma appliance of the present disclosure, the sound-absorbing sheet may be attached in a position covering the stoma hole when viewed from a direction perpendicular to the base plate.

[0016] In the sound-absorbing stoma appliance of the present disclosure, the porous layer of the sound-absorbing sheet has a first surface and a second surface opposite to the first surface, and the sound-absorbing sheet has a metal layer on the first surface of the porous layer, and the side having the metal layer may be removably attached onto the surface of the pouch.

[0017] In the sound-absorbing stoma appliance of the present disclosure, the metal layer may include aluminum or copper.

[0018] In the sound-absorbing stoma appliance of the present disclosure, the sound-absorbing sheet may have a normal incidence sound absorption coefficient of 0.5 or more in a frequency range of 1500 Hz or more and 4000 Hz or less.

[0019] In the sound-absorbing stoma appliance of the present disclosure, the porous layer of the sound-absorbing sheet may have a first surface and a second surface opposite to the first surface, and may have a recess on the side of the first surface, and the sound-absorbing sheet may be removably attached onto the surface of the pouch on the side of the first surface of the porous layer.

[0020] In the sound-absorbing stoma appliance of the present disclosure, the pouch may have an outlet for discharging the contained waste material, and the porous layer of the sound-absorbing sheet may have a cutout portion in a part of the outer periphery of the first surface on the side of the outlet, and the cutout portion may be connected to the recess.

[0021] In the sound-absorbing stoma appliance of the present disclosure, the depth of the recess may be greater than the thickness of the porous layer of the sound-absorbing sheet at the recess.

[0022] In the sound-absorbing stoma appliance of the present disclosure, the porous layer of the sound-absorbing sheet may have a first porous layer and a second porous layer, the first porous layer may have an opening, and may be removably attached onto the surface of the pouch on the side of the first porous layer.

[0023] In the sound-absorbing stoma appliance of the present disclosure, the pouch may have an outlet for discharging the contained waste material, and the porous layer of the sound-absorbing sheet may have a cutout portion in a part of the outer periphery of the first porous layer on the side of the outlet, and the cutout portion may be connected to the opening.

[0024] In the sound-absorbing stoma appliance of the present disclosure, the thickness of the first porous layer may be greater than the thickness of the second porous layer.

[0025] In the sound-absorbing stoma appliance of the present disclosure, the sound-absorbing sheet may have a metal layer on a first surface of the porous layer, and may be removably attached onto the surface of the pouch on the side having the metal layer.

[0026] In the sound-absorbing stoma appliance of the present disclosure, the sound-absorbing sheet may have a first metal layer on the first surface of the porous layer and a second metal layer on the bottom surface of the recess, and may be removably attached onto the surface of the pouch on the side having the first metal layer.

[0027] In the sound-absorbing stoma appliance of the present disclosure, the sound-absorbing sheet may have a metal layer on the second porous layer, and the first porous layer on the metal layer.

[0028] In the sound-absorbing stoma appliance of the present disclosure, the sound-absorbing sheet may be attached onto the surface of the pouch via an adhesive layer.

[0029] In the sound-absorbing stoma appliance of the present disclosure, the sound-absorbing sheet may be attached onto the surface of the pouch by a fastener.

[0030] In the sound-absorbing stoma appliance of the present disclosure, the fixing device may have a pocket.

[0031] In the sound-absorbing stoma appliance of the present disclosure, the fastener may include a band.

[0032] In the sound-absorbing stoma appliance of the present disclosure, the porous layer of the sound-absorbing sheet may contain at least one material selected from a polymeric porous body, a nonwoven fabric, and a fibrous material.

[0033] In the sound-absorbing stoma appliance of the present disclosure, the porous layer of the sound-absorbing sheet may contain polyurethane foam.

[0034] In the sound-absorbing stoma appliance of the present disclosure, the porous layer of the sound-absorbing sheet may contain polyester fibers.

[0035] In the sound-absorbing stoma appliance of the present disclosure, the porous layer of the sound-absorbing sheet may have a first surface and a second surface opposite to the first surface, and the sound-absorbing sheet may further include a sound-insulating layer laminated on the second surface of the porous layer.

[0036] In the sound-absorbing stoma appliance of the present disclosure, the sound-insulating layer may contain silicone rubber. Effect of the Invention

[0037] According to the present disclosure, it is possible to provide a sound-absorbing stoma appliance that can suppress the sound emitted from the stoma even when gas is generated in the intestinal tract and does not cause any hindrance when bathing, etc. [Brief description of the drawings]

[0038] [Figure 1] FIG. 1 shows an example of a sound-reducing stoma appliance according to the present disclosure. [Diagram 2] FIG. 2 is a diagram showing an example of a cross-sectional configuration of the sound-absorbing stoma appliance shown in FIG. 1. [Diagram 3] FIG. 13 shows another example of a sound-reducing stoma appliance according to the present disclosure. [Figure 4] FIG. 1 is a cross-sectional view showing an example of a sound-absorbing sheet for a sound-absorbing stoma appliance according to the present disclosure. [Diagram 5] FIG. 11 is a cross-sectional view showing another example of a sound-absorbing sheet for a sound-absorbing stoma appliance according to the present disclosure. [Figure 6] FIG. 13 is a diagram showing another example of a sound-absorbing sheet for the sound-absorbing stoma appliance of the present disclosure. [Figure 7] FIG. 13 is a diagram showing another example of a sound-absorbing sheet for the sound-absorbing stoma appliance of the present disclosure. [Figure 8] FIG. 13 is a diagram showing another example of a sound-absorbing sheet for the sound-absorbing stoma appliance of the present disclosure. [Figure 9] FIG. 13 is a diagram showing another example of a sound-absorbing sheet for the sound-absorbing stoma appliance of the present disclosure. [Figure 10] FIG. 11 is a cross-sectional view showing another example of a sound-absorbing sheet for a sound-absorbing stoma appliance according to the present disclosure. [Figure 11] FIG. 11 is a cross-sectional view showing another example of a sound-absorbing sheet for a sound-absorbing stoma appliance according to the present disclosure. [Figure 12] FIG. 13 is a diagram showing another example of a sound-absorbing sheet for the sound-absorbing stoma appliance of the present disclosure. [Figure 13] FIG. 13 is a diagram showing another example of a sound-absorbing sheet for the sound-absorbing stoma appliance of the present disclosure. [Figure 14] FIG. 11 is a cross-sectional view showing another example of a sound-absorbing sheet for a sound-absorbing stoma appliance according to the present disclosure. [Figure 15] A graph showing an example of the normal incidence sound absorption coefficient of the sound-absorbing sheet according to the sound-absorbing stoma appliance of the present disclosure. [Figure 16] FIG. 1 shows an example of a conventional stoma appliance. [Figure 17] FIG. 17 is a diagram showing an example of a cross-sectional configuration of the stoma appliance shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0039] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings. In the drawings, the scale and the aspect ratio are appropriately changed and exaggerated from those of the actual objects for the convenience of illustration and understanding. In addition, in this specification, the term "porous layer" means a layer having a plurality of voids (pores).

[0040] (Sound-reducing stoma appliance) Fig. 1 is a diagram showing an example of a sound-absorbing stoma appliance of the present disclosure, in which Fig. 1(a) is a schematic plan view of the sound-absorbing stoma appliance 1 as seen from the side where it is attached to the human body, and Fig. 1(b) is a schematic plan view of the sound-absorbing stoma appliance 1 as seen from the outside (i.e., the side opposite to the side where it is attached to the human body). Moreover, Fig. 2 is a diagram showing an example of a cross-sectional configuration of the sound-absorbing stoma appliance 1 shown in Fig. 1. Here, Fig. 2(a) corresponds to a schematic plan view of Fig. 1(b), and Fig. 2(b) corresponds to a cross-sectional view taken along line AA of Fig. 2(a). Fig. 3 is a diagram showing another example of the sound-absorbing stoma appliance of the present disclosure, in which Fig. 3(a) is a schematic plan view of a sound-absorbing stoma appliance 2 having a pocket 40 as a fastener, as viewed from the outside (i.e., the side opposite to the side worn on the human body), and Fig. 3(b) is a schematic plan view of a sound-absorbing stoma appliance 3 having a band 50 as a fastener, as viewed from the outside (i.e., the side opposite to the side worn on the human body).

[0041] As shown in Figures 1 and 2, the sound-absorbing stoma appliance 1 comprises a panel 11 that is adhered to the skin around the stoma, a pouch 13 that is connected to the panel 11 and that contains waste from the stoma, and a sound-absorbing sheet 20 that is attached onto the surface of the pouch 13.

[0042] The sound-absorbing stoma appliance 1 shown in Figures 1 and 2 differs from the stoma appliance 100 shown in Figures 16 and 17 in that it is provided with a sound-absorbing sheet 20. This sound-absorbing sheet 20 is provided to suppress the sound emitted from the stoma, and as will be described in detail later, has a porous layer as a configuration. The other components constituting the sound-absorbing stoma appliance 1 (for example, the base plate 11 and the pouch 13) can be the same as those used in conventional stoma appliances.

[0043] In the sound-absorbing stoma appliance 1 illustrated in Figures 1 and 2, the sound-absorbing sheet 20 is detachably attached onto the surface of the pouch 13 via the adhesive layer 30. Therefore, for example, when taking a bath, the sound-absorbing sheet 20 can be removed from the sound-absorbing stoma appliance 1, which can eliminate the inconvenience caused by the sound-absorbing sheet 20 getting wet. The removed sound-absorbing sheet 20 can be attached again to the sound-absorbing stoma appliance 1 via the adhesive layer 30, and by attaching the sound-absorbing sheet 20, the sound emitted from the stoma can be suppressed again.

[0044] The sound-absorbing sheet 20 is preferably attached to the outer surface of the pouch 13 opposite the side connected to the base plate 11, and more preferably attached in a position covering the stoma hole 12 provided in the base plate 11 when viewed from a direction perpendicular to the base plate 11 (for example, in the planar state shown in FIG. 1(b) or FIG. 2(a)). In such a position, the sound-absorbing sheet 20 is placed directly above the stoma inserted into the stoma hole 12, and sound emitted from the stoma can be effectively suppressed.

[0045] It is known that sounds emitted from a stoma are usually generated involuntarily by the wearer and cannot be controlled by the wearer. However, the sound absorbing effect of the sound absorbing sheet 20 can be further increased by consciously pressing the sound absorbing sheet 20 from the outside with one's hand beforehand, such as after a meal, when sounds are likely to be emitted from the stoma. In other words, by pressing the sound absorbing sheet 20 with one's hand against the sound-absorbing stoma appliance 1, sound leakage from the sides of the sound absorbing sheet 20 can be prevented.

[0046] The base plate 11 of the sound-absorbing stoma appliance 1 has a stoma hole 12 in the approximate center, and the wearer wears the sound-absorbing stoma appliance 1 by inserting his or her own stoma into the stoma hole 12. The base plate 11 has an adhesive layer on the surface facing the human body, and the sound-absorbing stoma appliance 1 is worn so that no gap is created between the adhesive layer of the base plate 11 and the skin around the stoma.

[0047] The pouch 13 is connected to the base plate 11 so that there is no gap between them, and contains waste from the wearer's stoma so that it does not leak from the pouch 13. The pouch 13 has an outlet 14 on its underside (more specifically, on the ground side when the wearer wearing the sound-absorbing stoma appliance 1 is standing upright) for discharging the contained waste from the pouch 13. Except when discharging, this outlet 14 is closed and waste from the stoma is stored in the pouch 13.

[0048] The main method for closing the outlet 14 is sealing with a clip (closure). For example, the wearer folds the pouch 13 near the outlet 14 and clips it to seal the outlet 14. There are also types in which a cap is provided on the outlet.

[0049] In addition, in Figures 1 and 2, a so-called one-piece type stoma appliance in which the panel 11 and the pouch 13 are integrated is shown as an example of the sound-absorbing stoma appliance 1, but the stoma appliance of the present disclosure may also be in the form of a so-called two-piece type stoma appliance in which the panel and the pouch are separable.

[0050] 1 and 2, the sound-absorbing sheet 20 is removably attached onto the surface of the pouch 13 via the adhesive layer 30. However, the sound-absorbing sheet 20 of the sound-absorbing stoma appliance of the present disclosure is not limited to this form, and the sound-absorbing sheet 20 may be removably attached onto the surface of the pouch 13 by other methods, for example, by a fastener.

[0051] For example, the sound-absorbing stoma appliance 2 shown in FIG. 3(a) has a pocket 40 as a fastening device, and in the sound-absorbing stoma appliance 2, the sound-absorbing sheet 20 is detachably attached onto the surface of the pouch 13 by means of this pocket 40.

[0052] To explain in more detail, the sound-absorbing stoma appliance 2 shown in Figure 3(a) has a pocket 40 as a fixing device, and this pocket 40 has a first pocket 40a on the upper side of the figure and a second pocket 40c on the lower side of the figure, via a slit 40b.

[0053] The first pocket 40a and the second pocket 40c are configured to have an elastic body having the shape of the first pocket 40a and the second pocket 40c on the surface of the pouch 13 of the sound-absorbing stoma appliance 2, and the outer periphery (excluding the part related to the slit 40b) of the elastic body having the shape of the first pocket 40a and the second pocket 40c is bonded to the surface of the pouch 13. Examples of the elastic body include various elastomers, various synthetic rubbers, and natural rubbers. Among them, silicone rubber has stable quality and is preferably used. The first pocket 40a and the second pocket 40c may be in a mesh form.

[0054] When attaching the sound-absorbing sheet 20 onto the surface of the pouch 13 of the sound-absorbing stoma appliance 2, the first pocket 40a and the second pocket 40c are deformed so that the slits 40b open in the vertical direction in the figure, and the sound-absorbing sheet 20 is inserted between the first pocket 40a and the second pocket 40c and the pouch 13 through this opening. The inserted sound absorbing sheet 20 is brought into close contact with the surface of the pouch 13 by the force of the first pocket 40a and the second pocket 40c, which have expanded due to the insertion of the sound absorbing sheet 20, tending to contract. When removing the sound absorbing sheet 20, the first pocket 40a and the second pocket 40c are deformed so that the slits 40b open in the vertical direction in the figure, and the sound absorbing sheet 20 can be removed from this opening.

[0055] On the other hand, the sound-absorbing stoma appliance 3 shown in FIG. 3(b) has a band 50 as a fastener, and in the sound-absorbing stoma appliance 3, the sound-absorbing sheet 20 is detachably attached onto the surface of the pouch 13 by means of this band 50. The band 50 is made of an elastic body, and its longitudinal ends (the left and right ends in the drawing) are bonded to the surface of the pouch 13. Examples of the elastic body include various elastomers, various synthetic rubbers, and natural rubbers. Among them, silicone rubber is preferably used because of its stable quality. The band 50 may be in a mesh form.

[0056] When the sound absorbing sheet 20 is attached onto the surface of the pouch 13 of the sound absorbing stoma appliance 3, the band 50 is pulled so as to create a gap between the band 50 and the surface of the pouch 13, and the sound absorbing sheet 20 is inserted between the band 50 and the pouch 13. The inserted sound absorbing sheet 20 is brought into close contact with the surface of the pouch 13 by the force of the band 50, which has expanded due to the insertion of the sound absorbing sheet 20, tending to contract.

[0057] In the sound-absorbing stoma appliance 3 shown in Fig. 3(b), a configuration having one wide band 50 as a fastener is exemplified, but the sound-absorbing stoma appliance of the present disclosure is not limited to this. For example, a configuration having multiple narrow bands as fasteners may be used. Furthermore, the bands may be arranged horizontally in the same direction or may be arranged to cross each other.

[0058] In the sound-absorbing stoma appliance 2 shown in Fig. 3(a) and the sound-absorbing stoma appliance 3 shown in Fig. 3(b), the sound-absorbing sheet 20 may be removably attached to the surface of the pouch 13 by both the adhesive layer 30 and the fixing device. The attachment of the sound-absorbing sheet 20 via the adhesive layer 30 may be reinforced by a fixing device.

[0059] The sound-absorbing stoma appliance 2 shown in FIG. 3(a) and the sound-absorbing stoma appliance 3 shown in FIG. 3(b) are exemplified as so-called one-piece stoma appliances in which the panel 11 and the pouch 13 are integrated, but the sound-absorbing stoma appliance of the present disclosure may also be in the form of a so-called two-piece stoma appliance in which the panel and the pouch are separable.

[0060] (sound absorbing sheet) Next, the sound-absorbing sheet used in the sound-absorbing stoma appliance of the present disclosure will be described. The sound-absorbing sheet used in the sound-absorbing stoma appliance of the present disclosure has a porous layer. For example, the sound-absorbing sheet used in the sound-absorbing stoma appliance of the present disclosure may be composed only of a porous layer. By being composed only of a porous layer, the weight can be further reduced. In addition, in order to achieve a lower frequency sound absorbing effect, a laminated structure including a porous layer and a metal layer may be used. The metal layer may have, for example, one or more openings (metal layer openings). The sound absorbing sheet used in the sound absorbing stoma appliance of the present disclosure may include any other appropriate layer as long as it has a laminated structure including a porous layer and a metal layer. Such other layer may have, for example, one or more openings. Moreover, each of the metal layer and the porous layer may be a layer consisting of only one layer, or may be a laminate consisting of two or more layers.

[0061] Fig. 4 is a schematic cross-sectional view showing one embodiment of a sound-absorbing sheet used in the sound-absorbing stoma appliance of the present disclosure. The sound-absorbing sheet 20 shown in Fig. 4 is composed of a porous layer 21 having a first surface (S1) and a second surface (S2) opposite to the first surface (S1).

[0062] Fig. 5 is a schematic cross-sectional view showing another embodiment of a sound-absorbing sheet used in the sound-absorbing stoma appliance of the present disclosure. The sound-absorbing sheet 20A shown in Fig. 5 includes a porous layer 21 having a first surface (S1) and a second surface (S2) opposite to the first surface (S1), and a metal layer 22 laminated on the first surface (S1) of the porous layer 21. Although not shown, another layer such as an adhesive layer may be provided between the porous layer 21 and the metal layer 22. When the sound-absorbing sheet 20 shown in FIG. 5 is used in the sound-absorbing stoma appliance of the present disclosure, it is attached so that the side on which the metal layer 22 is provided (the Z-direction side in the figure) faces the sound-absorbing stoma appliance (more specifically, the surface side of the pouch 13 of the sound-absorbing stoma appliance).

[0063] Furthermore, the sound absorbing sheet used in the sound-absorbing stoma appliance of the present disclosure may have a recess on the first surface (S1) side of the porous layer 21. For example, the sound absorbing sheet 20B shown in Fig. 6 has a recess 24A on the first surface (S1) side of the porous layer 21. Here, Fig. 6(a) is a plan view of the sound absorbing sheet 20B as viewed from the first surface (S1) side of the porous layer 21, and Fig. 6(b) corresponds to a cross-sectional view taken along line BB in Fig. 6(a).

[0064] Since the sound-absorbing sheet 20B shown in FIG. 6 has a recess 24A, the wearer of the sound-absorbing stoma appliance of the present disclosure can more easily determine the attachment position of the sound-absorbing sheet 20B in the pouch 13 by aligning this recess 24A with their own stoma (convex shape) inserted into the stoma hole 12 of the panel 11. When the sound absorbing sheet 20B is attached to the sound absorbing stoma appliance of the present disclosure, the side on which the recess 24A is provided (the Z direction side shown in FIG. 6(b)) is attached to the sound absorbing stoma appliance side.

[0065] The hole diameter (circle-equivalent hole diameter) of the recess 24A is preferably approximately the same as the diameter of the wearer's stoma when viewed in a plane, or somewhat larger than the diameter of the stoma when viewed in a plane, in order to more effectively achieve the above-mentioned effects. In general, the diameter of a stoma in a patient who has a constructed stoma is approximately 35 mm, so the hole diameter (D1 in the figure) of the recess 24A is preferably in the range of 30 mm to 50 mm. The circle-equivalent hole diameter is the diameter of a circle having the same area as the planar shape of the recess 24A.

[0066] The depth of the recess 24A (F1 in the figure) is preferably greater than the thickness of the porous layer 21 at the recess 24A (G1 in the figure), because this makes it possible to effectively suppress the sound emitted from the stoma while also reducing the weight of the sound-absorbing sheet 20B. In order to more effectively utilize the effects of the present disclosure, the depth of the recess 24A (F1 in the figure) is preferably in the range of 8 mm to 20 mm, and the thickness of the porous layer 21 in the recess 24A (G1 in the figure) is preferably in the range of 5 mm to 10 mm.

[0067] To obtain the sound absorbing sheet 20B shown in FIG. 6, for example, a method of carving out the recesses 24A and performing a cutting process, or a method of forming the recesses 24A in a circular shape by Thomson machining can be used.

[0068] The sound absorbing sheet used in the sound-absorbing stoma appliance of the present disclosure may have a cutout portion in part of the outer periphery of the first surface (S1) of the porous layer 21, and this cutout portion may be connected to the recess 24A. For example, the sound absorbing sheet 20C shown in Fig. 7 has a cutout portion 24B in part of the outer periphery of the first surface (S1) of the porous layer 21, and this cutout portion 24B is connected to the recess 24A. Here, Fig. 7(a) is a plan view of the sound absorbing sheet 20C seen from the first surface (S1) side of the porous layer 21, and Fig. 7(b) corresponds to a cross-sectional view taken along line CC in Fig. 7(a). In Figure 7(a), recess 24A has a circular shape with diameter D1 (more specifically, the shape of the area surrounded by the major arc (an arc larger than half the total circumference) from point P1 to point P4 in the figure and the straight line (chord) connecting point P1 and point P4), and cutout portion 24B has a trapezoidal shape (more specifically, the shape of the area surrounded by the straight line connecting point P1 and point P2 in the figure, the minor arc (an arc smaller than half the total circumference) connecting point P2 and point P3, the straight line connecting point P3 and point P4, and the straight line connecting point P4 and point P1).

[0069] The sound-absorbing sheet 20C shown in Figure 7 has a recess 24A, similar to the sound-absorbing sheet 20B shown in Figure 6 above. Therefore, a wearer of the sound-absorbing stoma appliance of the present disclosure can more easily determine the attachment position of the sound-absorbing sheet 20C in the pouch 13 by aligning this recess 24A with their own stoma (convex shape) inserted into the stoma hole 12 of the panel 11.

[0070] Furthermore, in the sound absorbing sheet 20C shown in FIG. 7, the first surface (S1) of the porous layer 21 has a cutout portion 24B in part of the outer periphery, and this cutout portion 24B is connected to the recess 24A. Here, a part of the outer periphery of the first surface (S1) of the porous layer 21 where the cutout portion 24B is provided (i.e., the minor arc connecting points P2 and P3 in FIG. 7(a)) is located on the side of the outlet 14 in the sound-absorbing stoma appliance 1 shown in FIGS. 1 and 2. In other words, when the wearer attaches the sound-absorbing sheet 20C to the sound-absorbing stoma appliance 1 shown in Figures 1 and 2, the sound-absorbing sheet 20C is attached so that a part of the outer periphery of the first surface (S1) of the porous layer 21 on which the cutout portion 24B is provided (i.e., the minor arc portion connecting points P2 and P3 in Figure 7(a)) is on the side of the outlet 14 of the sound-absorbing stoma appliance 1. When the sound absorbing sheet 20C is attached to the sound absorbing stoma appliance 1, the side on which the recessed portion 24A and the cutout portion 24B are provided (the Z direction side shown in FIG. 7(b)) faces the sound absorbing stoma appliance 1. Therefore, in the sound-absorbing stoma appliance 1 to which the sound-absorbing sheet 20C shown in FIG. 7 is attached, waste from the stoma moves smoothly toward the outlet 14 along the recess 24A and the cutout 24B.

[0071] The hole diameter (circle-equivalent hole diameter) of the recesses 24A of the sound absorbing sheet 20C shown in FIG. 7 can be set to be the same as the hole diameter of the recesses 24A of the sound absorbing sheet 20B shown in FIG. The depth of the recess 24A and the cutout portion 24B of the sound-absorbing sheet 20C (F1 shown in Figure 7(b)) and the thickness of the porous layer 21 at the recess 24A and the cutout portion 24B (G1 shown in Figure 7(b)) can also be similar to the depth of the recess 24A of the above-mentioned sound-absorbing sheet 20B (F1 shown in Figure 6(b)) and the thickness of the porous layer 21 at the recess 24A (G1 shown in Figure 6(b)).

[0072] The length L1 (the length of the straight line connecting points P1 and P4) and length L2 (the length of the straight line (chord) connecting points P2 and P3) of the cutout portion 24B of the sound-absorbing sheet 20C shown in Figure 7(a) are determined taking into consideration the effect of suppressing the discharge sound from the stoma and the effect of smoothly moving excrement from the stoma toward the discharge opening 14. For example, for a hole diameter (circle-equivalent hole diameter) D1 of the recess 24A shown in FIG. 7(a), the lengths of L1 and L2 can be in the ranges of 1 / 4×D1≦L1≦D1 and L1≦L2≦1.5×D1.

[0073] To obtain the sound absorbing sheet 20C shown in FIG. 7, for example, a method of carving out the recesses 24A and the cutouts 24B can be used.

[0074] In addition, the sound-absorbing sheet used in the sound-absorbing stoma appliance of the present disclosure may be in a form in which the porous layer 21 has a laminated structure in which a first porous layer and a second porous layer are laminated, and the first porous layer has an opening. For example, in the sound absorbing sheet 20D shown in Fig. 8, the porous layer 21 has a laminated structure in which a first porous layer 21A and a second porous layer 21B are laminated, and the first porous layer 21A is provided with an opening 25A corresponding to the recess 24A of the sound absorbing sheet 20B shown in Fig. 6. Here, Fig. 8(a) is a plan view of the sound absorbing sheet 20D seen from the side of the first porous layer 21A, and Fig. 8(b) corresponds to a cross-sectional view taken along line DD in Fig. 8(a).

[0075] Since the sound-absorbing sheet 20D shown in FIG. 8 has an opening 25A, the wearer of the sound-absorbing stoma appliance of the present disclosure can more easily determine the attachment position of the sound-absorbing sheet 20D in the pouch 13 by aligning this opening 25A with their own stoma (convex shape) inserted into the stoma hole 12 of the panel 11. When the sound absorbing sheet 20D is attached to the sound absorbing stoma appliance of the present disclosure, the side on which the opening 25A is provided (the Z direction side shown in FIG. 8(b)) is attached to the sound absorbing stoma appliance side.

[0076] Because of this laminated structure, the openings 25A are formed more easily in the sound absorbing sheet 20D than in the recesses 24A in the sound absorbing sheet 20B shown in Fig. 6. That is, the depth of the openings 25A can be controlled by the thickness of the first porous layer 21A (T1 shown in Fig. 8(b)), so the openings 25A can be formed by punching the first porous layer 21A without worrying about the depth. The hole diameter (circle-equivalent hole diameter) of the opening 25A can be similar to the hole diameter (circle-equivalent hole diameter) of the recess 24A of the sound-absorbing sheet 20B shown in Figure 6, and for example, the hole diameter (D2 in the figure) of the opening 25A is preferably in the range of 30 mm or more and 50 mm or less.

[0077] In addition, the depth of the opening 25A, i.e., the thickness (T1) of the first porous layer 21A, is preferably greater than the thickness (T2 shown in FIG. 8(b)) of the second porous layer 21B. This is because it is possible to effectively suppress the discharge sound from the stoma while reducing the weight of the sound-absorbing sheet 20D. The depth of the opening 25A, i.e., the thickness (T1) of the first porous layer 21A, may be the same as the depth of the recess 24A of the sound absorbing sheet 20B shown in Fig. 6, and is preferably in the range of 8 mm to 20 mm. The thickness (T2) of the second porous layer 21B is preferably in the range of 5 mm to 10 mm.

[0078] The first porous layer 21A and the second porous layer 21B may be made of the same material or different materials. For example, if a lighter sound-absorbing sheet that does not put pressure on the stoma is required, a porous layer made of a lightweight nonwoven fabric can be selected as the first porous layer 21A, and a porous layer made of a rigid foam can be selected as the second porous layer 21B. Although not shown in the figure, the first porous layer 21A and the second porous layer 21B can be laminated, for example, by providing a layer made of adhesive between the first porous layer 21A and the second porous layer 21B to form a laminated structure. Generally, a strong adhesive is used for the adhesive. The adhesive may be an existing acrylic, epoxy, or olefin adhesive. Among them, an acrylic adhesive that can be laminated at room temperature can be preferably used. The acrylic adhesive is a highly transparent double-sided adhesive protected by a release film on both sides, and is used as a transfer tape, and a thin one can be selected. The thickness is, for example, 30 μm or more and 400 μm or less, and 50 μm or more and 200 μm or less is preferably used. In the case of an acrylic resin, it has excellent adhesion and high peel strength. Examples of acrylic adhesives include those using a (meth)acrylic acid ester copolymer, adding a rosin ester tackifier resin, and containing an isocyanate crosslinking agent to crosslink the adhesive composition.

[0079] Furthermore, the sound absorbing sheet used in the sound-absorbing stoma appliance of the present disclosure may have a cutout portion in part of the outer periphery of the first porous layer 21A, and this cutout portion may be connected to the opening 25A. For example, the sound absorbing sheet 20E shown in Fig. 9 has a cutout 25B in part of the outer periphery of the first porous layer 21A, and this cutout 25B is connected to the opening 25A. Here, Fig. 9(a) is a plan view of the sound absorbing sheet 20E seen from the side of the first porous layer 21A, and Fig. 9(b) corresponds to a cross-sectional view taken along line EE in Fig. 9(a). In Figure 9(a), opening 25A has a circular shape with diameter D2 (more specifically, the shape of the area surrounded by the major arc from point P5 to point P8 in the figure and the straight line (chord) connecting point P5 and point P8), and cutout portion 25B has a trapezoidal shape (more specifically, the shape of the area surrounded by the straight line connecting point P5 and point P6 in the figure, the minor arc connecting point P6 and point P7, the straight line connecting point P7 and point P8, and the straight line connecting point P8 and point P5).

[0080] The sound-absorbing sheet 20E shown in Figure 9 has an opening 25A, similar to the sound-absorbing sheet 20D shown in Figure 8 above, so that a wearer of the sound-absorbing stoma appliance of the present disclosure can more easily determine the attachment position of the sound-absorbing sheet 20E in the pouch 13 by aligning this opening 25A with their own stoma (convex shape) inserted into the stoma hole 12 of the panel 11.

[0081] Furthermore, in the sound absorbing sheet 20E shown in FIG. 9, the first porous layer 21A has a cutout 25B in part of the outer periphery, and this cutout 25B is connected to the opening 25A. Here, a portion of the outer periphery of the first porous layer 21A in which the cutout portion 25B is provided (i.e., the minor arc connecting points P6 and P7 in Figure 9(a)) is located on the side of the outlet 14 in the sound-absorbing stoma appliance 1 shown in Figures 1 and 2. In other words, when the wearer attaches the sound-absorbing sheet 20E to the sound-absorbing stoma appliance 1 shown in Figures 1 and 2, the sound-absorbing sheet 20E is attached so that a part of the outer periphery of the first porous layer 21A where the cutout portion 25B is provided (i.e., the minor arc portion connecting points P6 and P7 in Figure 9(a)) is on the side of the outlet 14 of the sound-absorbing stoma appliance 1. When attaching the sound-absorbing sheet 20E to the sound-absorbing stoma appliance 1, the side on which the opening 25A and the cutout 25B are provided (the Z direction side shown in Figure 9 (b)) is attached to the sound-absorbing stoma appliance 1 side. Therefore, in the sound-absorbing stoma appliance 1 equipped with the sound-absorbing sheet 20E shown in FIG. 9, waste from the stoma moves smoothly toward the outlet 14 along the opening 25A and the cutout 25B.

[0082] The hole diameter (circle-equivalent hole diameter) of the openings 25A of the sound absorbing sheet 20E can be set to be the same as the hole diameter of the openings 25A of the sound absorbing sheet 20D described above. The depths of the openings 25A and the cutouts 25B of the sound-absorbing sheet 20E, i.e., the thickness of the first porous layer 21A (T1 shown in Figure 9(b)) and the thickness of the second porous layer 21B (T2 shown in Figure 9(b)), may also be similar to the thickness of the first porous layer 21A (T1 shown in Figure 8(b)) and the thickness of the second porous layer 21B (T2 shown in Figure 8(b)) of the above-mentioned sound-absorbing sheet 20D, respectively.

[0083] The length L3 (the length of the straight line connecting points P5 and P8) and length L4 (the length of the straight line (chord) connecting points P6 and P7) of the cutout portion 25B of the sound-absorbing sheet 20E shown in Figure 9(a) are determined taking into consideration the effect of suppressing the discharge sound from the stoma and the effect of smoothly moving excrement from the stoma toward the discharge opening 14. For example, for the hole diameter (circle-equivalent hole diameter) D2 of the opening 25A shown in FIG. 9(a), the lengths of L3 and L4 can be in the ranges of 1 / 4×D2≦L3≦D2 and L3≦L4≦1.5×D2.

[0084] To obtain the sound-absorbing sheet 20E shown in Figure 9, the first porous layer 21A is first punched to form the openings 25A and the cutouts 25B, and then the first porous layer 21A and the second porous layer 21B are laminated to produce the sound-absorbing sheet 20E.

[0085] In addition, the sound-absorbing sheet used in the sound-absorbing stoma appliance of the present disclosure may have a recess on the first surface (S1) of the porous layer, and may also have a metal layer on the first surface (S1) of the porous layer. For example, the sound absorbing sheet 20F shown in Fig. 10 has a recess 24A on the first surface (S1) of the porous layer 21, and a metal layer 22 on the first surface (S1) of the porous layer 21. The metal layer 22 has a metal layer opening 23, and has a recess 24A on the first surface (S1) of the porous layer 21 at a position overlapping with the metal layer opening 23. In other words, the sound absorbing sheet 20F shown in Fig. 10 corresponds to a form having a metal layer 22 on the first surface (S1) of the porous layer 21 of the sound absorbing sheet 20B shown in Fig. 6. Although not shown, a layer made of an adhesive may be provided between the porous layer 21 and the metal layer 22.

[0086] The sound absorbing sheet 20F shown in FIG. 10 has a metal layer 22, and therefore has an improved sound absorbing effect in the lower frequency range compared to the sound absorbing sheet 20B shown in FIG. 6 and the sound absorbing sheet 20D shown in FIG.

[0087] 10, the hole diameter of the metal layer opening 23 and the hole diameter of the recess 24A are the same (D1 in the figure). However, this is just one example, and in the sound absorbing sheet of this embodiment, the hole diameter of the metal layer opening 23 and the hole diameter of the recess 24A do not have to be the same. Furthermore, the planar shape of the metal layer opening 23 and the planar shape of the recess 24A may be the same shape or different shapes.

[0088] When the sound absorbing sheet 20F shown in FIG. 10 is used in the sound absorbing stoma appliance of the present disclosure, it is also attached so that the side on which the metal layer 22 is provided (the Z direction side in the figure) faces the sound absorbing stoma appliance.

[0089] The sound absorbing sheet used in the sound-absorbing stoma appliance of the present disclosure may have a recess on the first surface (S1) side of the porous layer 21, and a metal layer may be provided on the bottom surface of the recess. For example, the sound absorbing sheet 20G shown in Fig. 11 has a metal layer opening 23 in the first metal layer 22A, and a recess 24A on the first surface (S1) side of the porous layer 21 at a position overlapping with the metal layer opening 23. The second metal layer 22B is provided on the bottom surface (S3) of the recess 24A. In other words, the sound absorbing sheet 20G shown in Fig. 11 has a form in which the second metal layer 22B is provided on the bottom surface (S3) of the recess 24A of the sound absorbing sheet 20F shown in Fig. 10. Although not shown, a layer made of an adhesive may be provided between the porous layer 21 and the first metal layer 22A, and between the porous layer 21 and the second metal layer 22B.

[0090] 11, the hole diameter of the metal layer opening 23 and the hole diameter of the recess 24A are the same, but this is just one example, and in the sound absorbing sheet of this embodiment, the hole diameter of the metal layer opening 23 and the hole diameter of the recess 24A do not have to be the same. Moreover, the planar shape of the metal layer opening 23 and the planar shape of the recess 24A may be the same or different shapes. 11, the first metal layer 22A and the second metal layer 22B may be made of the same material or different materials, and the first metal layer 22A and the second metal layer 22B may have the same thickness or different thicknesses.

[0091] In addition, when the sound-absorbing sheet 20G shown in FIG. 11 is used in the sound-absorbing stoma appliance of the present disclosure, it is attached so that the side on which the metal layer (first metal layer 22A) is provided (the Z direction side in the figure) faces the sound-absorbing stoma appliance.

[0092] In addition, the sound-absorbing sheet used in the sound-absorbing stoma appliance of the present disclosure may have a metal layer on a second porous layer, a first porous layer on the metal layer, and an opening in the first porous layer. For example, the sound absorbing sheet 20H shown in Fig. 12 has a metal layer 22 on the second porous layer 21B, a first porous layer 21A on the metal layer 22, and an opening 25A in the first porous layer 21A. In other words, the sound absorbing sheet 20H shown in Fig. 12 corresponds to a form having a metal layer 22 between the first porous layer 21A and the second porous layer 21B of the sound absorbing sheet 20D shown in Fig. 8. Although not shown, a layer made of adhesive may be provided between the first porous layer 21A and the metal layer 22, and between the metal layer 22 and the second porous layer 21B. Here, FIG. 12(a) is a plan view of the sound absorbing sheet 20H as viewed from the side of the first porous layer 21A, and FIG. 12(b) corresponds to a cross-sectional view taken along line FF in FIG. 12(a).

[0093] Because of this configuration, in the sound-absorbing sheet 20H shown in FIG. 12, in addition to the effects achieved by the sound-absorbing sheet 20D shown in FIG. 8 described above, by having the metal layer 22, the sound-absorbing effect can be improved in the lower frequency range.

[0094] The sound absorbing sheet used in the sound absorbing stoma appliance of the present disclosure may have a metal layer 22 on the second porous layer 21B, a first porous layer 21A on the metal layer 22, a notch on a part of the outer periphery of the first porous layer 21A, and the notch connected to the opening 25A. In other words, the sound absorbing sheet used in the sound absorbing stoma appliance of the present disclosure may have a metal layer 22 between the first porous layer 21A and the second porous layer 21B of the sound absorbing sheet 20E shown in FIG.

[0095] For example, the sound absorbing sheet 20I shown in Fig. 13 has a metal layer 22 on the second porous layer 21B, and a first porous layer 21A on the metal layer 22. The first porous layer 21A has a cutout 25B in a part of the outer periphery, and the cutout 25B is connected to the opening 25A. The metal layer 22 is exposed at the opening 25A and the cutout 25B. Although not shown, a layer made of adhesive may be provided between the first porous layer 21A and the metal layer 22, and between the metal layer 22 and the second porous layer 21B. FIG. 13(a) is a plan view of the sound absorbing sheet 20I viewed from the side of the first porous layer 21A, and FIG. 13(b) corresponds to a cross-sectional view taken along line GG in FIG. 13(a).

[0096] In Figure 13(a), opening 25A has a circular shape with diameter D2 (more specifically, the shape of the area surrounded by the major arc from point P5 to point P8 in the figure and the straight line (chord) connecting point P5 and point P8), and cutout portion 25B has a trapezoidal shape (more specifically, the shape of the area surrounded by the straight line connecting point P5 and point P6 in the figure, the minor arc connecting point P6 and point P7, the straight line connecting point P7 and point P8, and the straight line connecting point P8 and point P5).

[0097] Because of this configuration, in the sound-absorbing sheet 20I shown in FIG. 13, in addition to the effects achieved by the sound-absorbing sheet 20E shown in FIG. 9 described above, by having the metal layer 22, the sound-absorbing effect can be improved in the lower frequency range.

[0098] The sound absorbing sheet used in the sound-absorbing stoma appliance of the present disclosure may also include a sound insulating layer. For example, the sound absorbing sheet 20J shown in Fig. 14 has a configuration in which a sound insulating layer 26 is laminated on the second surface (S2) of the porous layer 21 in the sound absorbing sheet 20A shown in Fig. 5. Although not shown, another layer such as an adhesive layer may be provided between the porous layer 21 and the sound insulating layer 26. Although not shown, the sound-absorbing sheet used in the sound-absorbing stoma appliance of the present disclosure may be in a form in which a sound-insulating layer 26 is laminated on the second surface (S2) of the porous layer 21 of the sound-absorbing sheet 20 shown in FIG. 4, the sound-absorbing sheet 20B shown in FIG. 6, the sound-absorbing sheet 20C shown in FIG. 7, the sound-absorbing sheet 20F shown in FIG. 10, and the sound-absorbing sheet 20G shown in FIG. 11. Similarly, the sound-absorbing sheet used in the sound-absorbing stoma appliance of the present disclosure may be in a form in which a sound-insulating layer 26 is laminated on the second porous layer 21B (on the surface opposite to the first porous layer 21A) of the sound-absorbing sheet 20D shown in Figure 8 above, the sound-absorbing sheet 20E shown in Figure 9, the sound-absorbing sheet 20H shown in Figure 12, and the sound-absorbing sheet 20I shown in Figure 13.

[0099] When the sound absorbing sheet 20J shown in FIG. 14 is used in the sound absorbing stoma appliance of the present disclosure, it is also attached so that the side on which the metal layer 22 is provided (the Z direction side in the figure) faces the sound absorbing stoma appliance.

[0100] The sound absorbing sheet used in the sound absorbing stoma appliance of the present disclosure has an overall thickness of preferably 5 mm to 100 mm, more preferably 5 mm to 30 mm. If the overall thickness of the sound absorbing sheet is within the above range, the sound absorbing sheet is thin, and even if it is attached to the surface of the pouch 13 of the sound absorbing stoma appliance, problems can be suppressed. Furthermore, making the sound absorbing sheet thin also contributes to reducing the weight of the sound absorbing sheet.

[0101] The average density of the sound absorbing sheet is preferably 300 kg / m 3 More preferably, it is 1 kg / m or less. 3 More than 200kg / m 3 More preferably, it is 5 kg / m or less. 3 More than 150kg / m 3 or less, and particularly preferably 10 kg / m 3 More than 100kg / m 3 or less, most preferably 20 kg / m 3 More than 50kg / m 3 If the density of the sound absorbing sheet is within the above range, the sound absorbing sheet becomes lightweight, and even if it is placed on the surface of the pouch 13 of the sound absorbing stoma appliance, problems caused by the sheet can be suppressed.

[0102] The planar shape of the sound absorbing sheet may be a circle, an ellipse, or any other shape that is composed of curved lines. It may also be a polygon, such as a rectangle or a hexagon, or may have curved corners of a polygon. Furthermore, it may be any shape that includes straight lines and curved lines. The sound-absorbing sheet preferably has an equivalent circle diameter in the range of 50 mm to 150 mm in order to maximize the effects of the present disclosure. The equivalent circle diameter is the diameter of a circle having the same area as the planar shape of the sound-absorbing sheet. Furthermore, the sound absorbing sheet is required to be lightweight, preferably weighing 50 g or less per sheet.

[0103] At least a part of the peripheral edge of the sound absorbing sheet may be covered with any appropriate layer as long as the effect of the present disclosure is not impaired. In addition, the peripheral edge of the sound absorbing sheet may be covered by deforming the cross-sectional shape by pressing or the like.

[0104] Hereinafter, each layer constituting the sound-absorbing sheet used in the sound-absorbing stoma appliance of the present disclosure will be described. (porous layer) The porous layer 21 (hereinafter, the same applies to the first porous layer 21A and the second porous layer 21B) has a plurality of voids (pores). The structure of the pores in the porous layer 21 is not particularly limited, but may be a structure in which at least a portion of each pore is three-dimensionally continuous (for example, an open-cell structure).

[0105] The average circular equivalent pore diameter of the surface openings formed by the individual pores constituting the pores of the porous layer 21 is preferably smaller than the circular equivalent pore diameter of the metal layer openings 23 formed in the metal layer 22 . The above-mentioned average circular equivalent pore diameter is the diameter of a circle having the same area as the average area of ​​the individual surface openings formed by the individual holes in the porous layer 21, and the above-mentioned circular equivalent pore diameter of the metal layer opening 23 is the diameter of a circle having the same area as the planar shape of the hole that constitutes the metal layer opening 23.

[0106] The average circular equivalent pore size of the multiple surface openings formed by the pores in the porous layer 21 is preferably 5000 μm or less, more preferably 1 μm or more and 5000 μm or less, even more preferably 10 μm or more and 4000 μm or less, even more preferably 20 μm or more and 3000 μm or less, even more preferably 50 μm or more and 2000 μm or less, and particularly preferably 100 μm or more and 1000 μm or less, in order to better realize the effects of the present disclosure.

[0107] The density of the porous layer 21 is preferably 300 kg / m 3More preferably, it is 1 kg / m or less. 3 More than 300kg / m 3 More preferably, it is 1 kg / m or less. 3 More than 200kg / m 3 More preferably, it is 1 kg / m or less. 3 More than 100kg / m 3 More preferably, it is 5 kg / m or less. 3 More than 70kg / m 3 More preferably, it is 5 kg / m or less. 3 More than 50kg / m 3 or less, most preferably 10 kg / m 3 More than 30kg / m 3 If the density of the porous layer 21 is within the above range, it is possible to provide a sound absorbing sheet that is thinner, lighter, and has excellent sound absorbing properties.

[0108] The material constituting the porous layer 21 may be any appropriate material as long as it does not impair the effects of the present disclosure. Such a material preferably includes at least one selected from a polymeric porous body, a nonwoven fabric, and a fibrous material, in that the effects of the present disclosure can be more effectively exhibited. Among these, a polymeric porous body and a nonwoven fabric are preferable because they are light and have high sound absorption performance. Specific examples of fibrous materials include glass wool, rock wool, and felt materials.

[0109] The porous layer 21 may be colored with a dye or pigment as necessary. As a coloring method, a dyed yarn may be used, which is made by mixing a dye or pigment with a polymer before spinning, or fibers colored by various methods may be used. The sound-absorbing sheet may be colored with a dye or pigment.

[0110] (Porous polymers) Specific examples of the polymeric porous body include polyurethane foam, polystyrene foam, polyolefin (e.g., polyethylene, polypropylene) foam, and ethylene-propylene-diene rubber (EPDM) foam. Any appropriate structure can be adopted as the porous structure of the polymeric porous body depending on the purpose. For example, such a structure may be a closed cell structure in which each cell formed by foaming is independent, or a continuous cell structure in which at least a part of the cells are continuous.

[0111] The polyurethane foam is composed of a porous elastic body made of polyurethane having a plurality of pores. The polyurethane forming the matrix of the porous elastic body can be produced by polymerization reaction of a polyol component and a polyisocyanate component.

[0112] The polyol component includes a high molecular weight polyol and a chain extender. Examples of the high molecular weight polyol include polyether polyols such as polypropylene glycol, polytetramethylene glycol, and polymer polyols, adipate polyols, polyester polyols such as polycaprolactone polyols, polycarbonate polyols, and polyolefin polyols. Examples of the chain extender include low molecular weight diols such as ethylene glycol, 1,3-propanediol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, and 3-methyl-1,5-pentanediol.

[0113] The polyisocyanate component includes a polyisocyanate compound. Examples of polyisocyanates contained in the polyisocyanate component include aromatic isocyanates such as tolylene diisocyanate (TDI), diphenylmethane-4,4'-diisocyanate (MDI), xylylene diisocyanate (XDI), 1,5-naphthalene diisocyanate (NDI), and tetramethylxylylene diisocyanate (TMXDI), alicyclic isocyanates such as isophorone diisocyanate (IPDI) and hydrogenated xylylene diisocyanate (H6XDI), and aliphatic isocyanates such as hexamethylene diisocyanate (HDI), dimer acid diisocyanate (10-[5,6-dihexyl-2-(8-isocyanatooctyl)-3-cyclohexen-1-yl]-9-decenyl isocyanate), and norbornene diisocyanate (NBDI).

[0114] The polyol component may be used alone or in combination of two or more of the above. Similarly, the polyisocyanate component may be used alone or in combination of two or more of the above. As a precursor of polyurethane, a polyurethane water dispersion in which polyurethane formed from the polyol component and the polyisocyanate component is dispersed in a water-based solvent may be used.

[0115] The porous elastic body can be formed, for example, as follows: Although not particularly limited, as an example, a method of forming the porous elastic body in an aqueous solvent using a pore-forming component and other additives (such as a surfactant) in addition to the polyol component and the polyisocyanate component by a water coagulation method will be described.

[0116] First, in addition to the polyol component and the polyisocyanate component, a pore-forming component, a water-based solvent, and other additives are prepared.

[0117] As the pore-forming component, a pore-forming agent made of a water-soluble inorganic salt can be used. Examples of such inorganic salts include sodium salts and potassium salts. More specifically, chlorides such as sodium chloride and potassium chloride, and sulfates such as sodium sulfate (mirabilite) and potassium sulfate (sulfate) can be used.

[0118] When the pore-forming component dissolves in the polyurethane, cavities are formed where the pore-forming component was present. These cavities become the source of the pores in the porous elastic body. As an example, it is preferable that the pore-forming component at least partially contains a pore-forming agent with an average particle size of 50 μm or less. In order to reduce the variation in the size of the pores formed, it is preferable to use a pore-forming component that contains a pore-forming agent with a narrow particle size distribution. The pore size is related to sound absorption properties and preferably contains an average particle size of 100 μm or more. The pore size is a mixture of pores with diameters of 30 μm or more and 2000 μm or less.

[0119] On the other hand, when the pore size becomes smaller, the strength and elasticity of the foam tend to decrease. Therefore, it is preferable that the porous elastic body contains some pores with large diameters. The thickness of the skeletal structure of the foam surrounding the large pores tends to be thicker than the thickness of the skeletal structure surrounding the small pores. Such a thick skeletal structure acts like a pillar supporting the internal structure of the foam. This increases the strength and elasticity of the foam, making it less likely to collapse.

[0120] Therefore, the pore-forming component preferably contains both a first pore-forming agent having an average particle size of 50 μm or less and a second pore-forming agent having an average particle size of more than 50 μm. The ratio of the second pore-forming agent to the total amount of the pore-forming components can be appropriately selected in consideration of the required strength and elastic modulus. The ratio is, for example, 40% by mass or less, 30% by mass or less, 20% by mass or less, or 10% by mass or less, based on 100% by mass of the pore-forming components.

[0121] The amount of the pore-forming component is preferably 100 parts by mass or more and 2000 parts by mass or less, more preferably 500 parts by mass or more and 1500 parts by mass or less, per 100 parts by mass of the solid content of the polyurethane to be formed. If the amount of the pore-forming component is too small, the pore-forming material does not spread throughout the polyurethane, and the distribution of the pores tends to be non-uniform. If the amount of the pore-forming component is too large, the strength of the porous elastic body tends to decrease. When using a pore-forming agent in an amount of 100 parts by mass or more and 2000 parts by mass or less per 100 parts by mass of the solid content of the polyurethane to be formed, it is preferable because the distribution of the pores formed in the porous elastic body and the strength and elasticity of the porous elastic body are moderate.

[0122] The aqueous solvent may be water or a mixture of water and a water-soluble solvent. Examples of the water-soluble solvent include alcohol-based solvents such as methanol, ethanol, and ethylene glycol. From the viewpoints of low environmental impact and cost, it is preferable to use water alone as the aqueous solvent.

[0123] The amount of the aqueous solvent (preferably water) is preferably 10 parts by mass or more and 300 parts by mass or less, more preferably 10 parts by mass or more and 200 parts by mass or less, per 100 parts by mass of the solid content of the polyurethane to be formed. This range is preferable in that the viscosity of the polyurethane-containing solution is appropriate and the obtained polyurethane has appropriate strength and elasticity.

[0124] Examples of the other additives include surfactants such as sorbitan fatty acid esters, polyglycerin fatty acid esters, polyethylene glycol oleates, etc. The surfactant is preferably used in an amount of 5 parts by mass or more and 50 parts by mass or less per 100 parts by mass of the solid content of the polyurethane to be formed.

[0125] Using these raw materials, a polyurethane porous elastic body is formed by a method called the water coagulation method. First, the above components are charged into a kneading device and kneaded. For kneading, a kneader, an auger kneader, a Banbury mixer, a screw extruder, etc. can be used.

[0126] After kneading, the resulting mixture is degassed. After degassing, the mixture is molded into a desired shape. The degassing method is not particularly limited. For example, degassing under reduced pressure may be performed using a vented extruder. The molding method is also not particularly limited. For example, a molding die (T-die) corresponding to the desired shape may be connected to the vented extruder used for degassing under reduced pressure, and molding may be performed.

[0127] After molding, the obtained molded body is put into water or an aqueous solution. This operation replaces the solvent with water and precipitates polyurethane. This operation is called water coagulation. The procedure up to putting the molded body is not particularly limited, but for example, in the molding process, the kneaded material is extruded and filled into a box-shaped material with an open top using a punching metal made of stainless steel 304 or the like, molding is performed, and the obtained molded body is put into water or an aqueous solution.

[0128] After the water coagulation operation, the pore-forming agent consisting of a water-soluble inorganic salt is removed by dissolving it in water. The method is not particularly limited, but the following method can be mentioned, for example. The molded body of the kneaded material in a container is left in warm water to dissolve most of the pore-forming agent. Then, the molded body is put into a general washing machine or the like and washed in water of 20°C to 80°C for 15 minutes to 90 minutes. During washing, it is preferable to replace the washing water as necessary.

[0129] The molded article thus obtained is then dried. In order to prevent deterioration of the polyurethane due to heat, drying is carried out, for example, in a dryer at 110°C or lower. In this way, a foam made of a polyurethane porous elastic body is obtained.

[0130] The pore size and distribution of the porous elastomer can be controlled by adjusting the ratio of the polyol component and polyurethane component that make up the polyurethane, the kneading conditions and kneading time, the type and amount of additives, the amount, particle size, and particle size distribution of the pore-forming agent, etc. In particular, the ease with which pores are formed varies depending on the type of polyurethane component. Therefore, various conditions are appropriately adjusted depending on the properties of the polyurethane component and the required properties. In addition, the state of pore formation can be changed by adjusting the type and amount of surfactant.

[0131] (Nonwoven fabric) The nonwoven fabric used in the sound absorbing sheet may be either a nonwoven fabric made of short fibers or a nonwoven fabric made of long fibers. For example, needle punched nonwoven fabric, water jet punched nonwoven fabric, melt blown nonwoven fabric, spun bonded nonwoven fabric, stitch bonded nonwoven fabric, etc. are used. Among them, needle punched nonwoven fabric or water jet punched nonwoven fabric is preferable, and needle punched nonwoven fabric is particularly preferable. Miscellaneous felt can also be used as the nonwoven fabric. Its basis weight is 150 g / m 2 More than 800g / m 2 The bulk density is 0.01 g / cm or less. 3 More than 0.2g / cm 3 It is desirable that the following:

[0132] The cross-sectional shape of the fibers constituting the nonwoven fabric is not particularly limited, and may be a perfect circle or an irregular cross-sectional shape, such as an ellipse, hollow, X-shaped, Y-shaped, T-shaped, L-shaped, star-shaped, lobed (e.g., trefoil, tetralobal, pentacole, etc.), or other polygonal (e.g., triangular, rectangular, pentagonal, hexagonal, etc.) cross-sectional shape. The fibers constituting the nonwoven fabric may be natural or synthetic, but synthetic fibers are preferably used from the viewpoint of durability. Examples of such fibers include thermoplastic fibers such as polyester fibers, polyamide fibers (e.g., nylon fibers, etc.), acrylic fibers, and polyolefin fibers (e.g., polypropylene fibers, polyethylene fibers, etc.), and the above-mentioned fiber materials can be used by known methods such as wet spinning, dry spinning, or melt spinning. Among them, polyester fibers, polypropylene fibers, and nylon fibers are preferred from the viewpoint of excellent durability and abrasion resistance. In particular, polyester fibers are most preferred from the viewpoints that the raw polyester can be easily recycled by thermal melting of used nonwoven fabric, it is economical, the texture of the nonwoven fabric is good, and it is excellent in moldability.

[0133] The polyester fiber is not particularly limited as long as it is made of a polyester resin. The polyester resin is not particularly limited as long as it is a polymer resin containing an ester bond in the repeating unit, and may be a polyester resin consisting of a dicarboxylic acid component and a glycol component, the main repeating unit of which is ethylene terephthalate. The polyester fiber may also be a biodegradable polyester fiber such as polycaprolactone, polyethylene succinate, polybutylene succinate, polyethylene adipate, polybutylene adipate, polyethylene succinate-adipate copolymer, polylactic acid, or a polyester fiber copolymerized with other dicarboxylic acids and / or glycols using these as the main components. Examples of the dicarboxylic acid component include terephthalic acid, 2,6-naphthalenedicarboxylic acid, isophthalic acid, and 1,4-cyclohexanedicarboxylic acid. Examples of the glycol component include ethylene glycol, propylene glycol, tetramethylene glycol, 1,3-propanediol, 1,4-butanediol, and 1,4-cyclohexanedimethanol. A portion of the dicarboxylic acid component may be replaced with adipic acid, sebacic acid, dimer acid, sulfonic acid, metal-substituted isophthalic acid, or the like, and a portion of the glycol component may be replaced with diethylene glycol, neopentyl glycol, 1,4-cyclohexanediol, 1,4-cyclohexanedimethanol, polyalkylene glycol, or the like.

[0134] The polyester fibers are usually produced from polyester resins by known spinning methods such as melt spinning. Examples of the polyester fibers include polyethylene terephthalate (PET) fibers, polybutylene terephthalate (PBT) fibers, polyethylene phthalate (PEN) fibers, polycyclohexylene dimethylene terephthalate (PCT) fibers, polytrimethylene terephthalate (PTT) fibers, and polytrimethylene naphthalate (PTN) fibers, with polyethylene terephthalate (PET) fibers being particularly preferred. The polyester fibers may contain particles such as various inorganic particles such as titanium oxide, silicon oxide, calcium carbonate, silicon nitride, clay, talc, kaolin, and zirconium acid, crosslinked polymer particles, and various metal particles, as well as conventional antioxidants, sequestering agents, ion exchange agents, color inhibitors, waxes, silicone oils, and various surfactants.

[0135] The polypropylene fiber is not particularly limited as long as it is a fiber made of polypropylene resin. The polypropylene resin is not particularly limited as long as it is a polymer resin containing a -CH(CH3)CH2- structure in the repeating unit, and examples thereof include polypropylene resin, propylene-olefin copolymer resin such as propylene-ethylene copolymer resin, etc. The polypropylene fiber is produced from the polypropylene resin by a known spinning method such as melt spinning. In addition, various additives that may be added to the polyester fiber may be added to the polypropylene fiber.

[0136] The above nylon fibers include polycaproamide (nylon 6), polyhexamethylene adipamide (nylon 66), polytetramethylene adipamide (nylon 46), polyhexamethylene sebacamide (nylon 610), polyhexamethylene dodecamide (nylon 612), polyundecane amide (nylon 11), polydodecanamide (nylon 12), polymetaxylene adipamide (nylon MXD6), polyhexamethylene terephthalamide (nylon 6T), polyhexamethylene isophthalamide (nylon 6I), polyxylylene adipamide (nylon XD6), polycaproamide / polyhexamethylene terephthalamide copolymer (nylon 6 / 6T), polyhexamethylene adipamide / polyhexamethylene terephthalamide copolymer (nylon 66 / 6T), polyhexamethylene adiamide (nylon 10), polyhexamethylene terephthalamide copolymer ... Examples of the fibers include fibers made of nylon resins and nylon copolymer resins such as dipamide / polyhexamethylene isophthalamide copolymer (nylon 66 / 6I), polyhexamethylene adipamide / polyhexamethylene isophthalamide / polycaproamide copolymer (nylon 66 / 6I / 6), polyhexamethylene terephthalamide / polyhexamethylene isophthalamide copolymer (nylon 6T / 6I), polyhexamethylene terephthalamide / polydodecanamide copolymer (nylon 6T / 12), polyhexamethylene adipamide / polyhexamethylene terephthalamide / polyhexamethylene isophthalamide copolymer (nylon 66 / 6T / 6I) or polyhexamethylene terephthalamide / poly-2-methylpentamethylene terephthalamide copolymer (nylon 6T / M5T). Nylon fibers are produced from these nylon resins by known production methods such as melt spinning, etc. The above-mentioned additives that may be added to polyester fibers may be added to the nylon fibers.

[0137] The fiber length and fineness of each of the above fibers are not particularly limited and can be appropriately determined depending on the compatibility with other synthetic fibers and the use of the flame-retardant nonwoven fabric, but the fiber length is preferably 10 mm or more. Long or short fibers may be used, but in the case of short fibers, the fiber length is preferably 10 mm or more and 100 mm or less, and particularly preferably 20 mm or more and 80 mm or less. By using short fibers with a fiber length of 10 mm or more, the entangled short fibers are less likely to fall off the nonwoven fabric. On the other hand, the longer the fiber length, the better the sound absorption, but the spinnability and flame retardancy tend to be inferior, so it is preferable to set the fiber length to 100 mm or less. The fineness is preferably 0.5 dtex to 30 dtex, preferably 1.0 dtex to 20 dtex, and particularly 1.0 dtex to 10 dtex.

[0138] The above-mentioned staple fibers can be used alone or in combination of two or more kinds. Staple fibers of the same kind or different kinds having different fineness or fiber length can also be used in combination. In this case, the mixing ratio of the fibers is optional and can be appropriately determined according to the use and purpose of the nonwoven fabric.

[0139] In order to obtain a nonwoven fabric with better flame retardancy, it is preferable to integrate the above-mentioned staple fiber with a heat-resistant staple fiber by entangling them. The heat-resistant staple fiber has an LOI (limiting oxygen index) value of 25 or more, and does not include fibers that have been flame-retarded by adding a flame retardant, such as flame-retardant rayon fiber, flame-retardant vinylon fiber, and modacrylic fiber. Here, the LOI value means the minimum oxygen concentration required to burn continuously for 5 cm or more, and the LOI value is a value measured according to the JIS L 1091 method. If the LOI value of the heat-resistant staple fiber is 25 or more, flame retardancy can be imparted to the nonwoven fabric, but in order to obtain a nonwoven fabric with better flame retardancy, it is desirable for the LOI value to be 28 or more.

[0140] Heat-resistant short fibers are excellent in that they are low-shrinkage fibers that do not melt and shrink when the nonwoven fabric is burned, and it is particularly desirable that the dry heat shrinkage rate at 280°C is 1% or less. Specific examples of heat-resistant short fibers include short fibers obtained by cutting one or more types of heat-resistant organic fibers selected from aramid fibers, polyphenylene sulfide fibers, polybenzoxazole fibers, polybenzothiazole fibers, polybenzimidazole fibers, polyether ether ketone fibers, polyarylate fibers, polyimide fibers, fluorine fibers, and flame-resistant fibers to a desired fiber length. These heat-resistant short fibers can be those known in the art or those manufactured according to a known method or a method similar thereto. Here, the flame-resistant fibers are mainly manufactured by baking acrylic fibers in an active atmosphere such as air at 200°C to 500°C, and are precursors of carbon fibers. For example, there may be mentioned "Lastan" (registered trademark) manufactured by Asahi Kasei Corporation and "Pyromex" (registered trademark) manufactured by Toho Tenax Co., Ltd.

[0141] Among the above-mentioned heat-resistant organic fibers, from the viewpoints of low shrinkage and processability, at least one organic fiber selected from aramid fiber, polyphenylene sulfide fiber, polybenzoxazole fiber, polyether ether ketone fiber, polyarylate fiber and flame-resistant fiber is preferred, and aramid fiber is particularly preferred.

[0142] Aramid fibers include para-aramid fibers and meta-aramid fibers, with para-aramid fibers being particularly preferred due to their low heat shrinkage. Examples of para-aramid fibers that can be used include commercially available products such as polyparaphenylene terephthalamide fibers (manufactured by DuPont USA and Toray DuPont Co., Ltd., product name "KEVLAR" (registered trademark)) and copolyparaphenylene-3,4'-oxydiphenylene terephthalamide fibers (manufactured by Teijin Limited, product name "Technora" (registered trademark)).

[0143] The above-mentioned aramid fibers may have a film former, a silane coupling agent and a surfactant applied to the surface and inside of the fibers. The solid content of these surface treatment agents attached to the aramid fibers is preferably in the range of 0.01% by mass or more and 20% by mass or less.

[0144] The fiber length and fineness of the heat-resistant short fibers are not particularly limited, and can be appropriately determined depending on the compatibility with the thermoplastic short fibers and the use of the sound-absorbing sheet. The fineness is 0.1 dtex to 50 dtex, preferably 0.3 dtex to 30 dtex, more preferably 0.5 dtex to 15 dtex, and particularly preferably 1.0 dtex to 10 dtex. The fiber length is not particularly limited, but in consideration of flame retardancy and productivity, the fiber length is preferably 20 mm to 100 mm, particularly preferably 40 mm to 80 mm.

[0145] The heat-resistant short fibers can be used alone or in combination of two or more kinds. The same or different kinds of fibers having different fineness or fiber length can also be used in combination. In this case, the fiber mixing ratio is arbitrary and can be appropriately determined according to the use and purpose of the sound-absorbing sheet.

[0146] The thermoplastic staple fibers and the heat-resistant staple fibers are preferably blended in such a range that the mass ratio of the thermoplastic staple fibers to the heat-resistant staple fibers is 95:5 to 55:45. If the ratio exceeds 95% by mass, the flame retardancy of the nonwoven fabric becomes insufficient, and dripping is likely to occur. In other words, by including 5% by mass or more of the heat-resistant staple fibers in the web and intertwining them with the thermoplastic staple fibers, it is possible to prevent the thermoplastic staple fibers from burning and melting. On the other hand, if the ratio is less than 55% by mass, the flame retardancy is good, but the processability when processing the nonwoven fabric into a desired size becomes poor, and the economic efficiency is also poor. From the viewpoints of flame retardancy and processability, the mass ratio of the thermoplastic staple fibers to the heat-resistant staple fibers is more preferably 88:12 to 55:45, even more preferably 85:15 to 55:45, and most preferably 85:15 to 65:35.

[0147] In order to improve the abrasion resistance and sound absorbing properties of the nonwoven fabric, it is preferable to contain fine denier thermoplastic staple fibers in the thermoplastic staple fibers. Examples of the fine denier thermoplastic staple fibers include one or more types of fibers selected from the above-mentioned polyester fibers, polypropylene fibers, polyethylene fibers, linear low density polyethylene fibers, ethylene-vinyl acetate copolymer fibers, etc.

[0148] The fineness of the thermoplastic short fibers of fine denier is usually 0.1 dtex or more and 15 dtex or less, preferably 0.5 dtex or more and 6.6 dtex or less, and particularly preferably 1.1 dtex or more and 3.3 dtex or less. If the fineness is too fine, the processability is poor, and if it is too thick, the sound absorbing properties are reduced. In addition, the fiber length is not particularly limited and can be appropriately determined depending on the compatibility with the heat-resistant short fibers and the use of the sound absorbing sheet, but it is usually preferable for the short fibers to be 10 mm or more and 100 mm or less, and particularly preferably 20 mm or more and 80 mm or less.

[0149] When fine denier thermoplastic short fibers are blended into the web, the blending ratio of the fine denier thermoplastic short fibers is desirably 30% by mass or more and 70% by mass or less, more preferably 30% by mass or more and 50% by mass or less, of the total amount of the thermoplastic short fibers.

[0150] The weight of the nonwoven fabric is 150g / m 2 More than 800g / m 2 If the basis weight is too small, handling during production becomes difficult, for example, the shape retention of the web layer becomes poor, whereas if the basis weight is too large, the energy required for entangling the fibers becomes large or entanglement becomes insufficient, causing inconveniences such as deformation during nonwoven fabric processing.

[0151] The web can be produced by a conventional web-forming apparatus and a conventional web-forming method, for example, by opening the blended thermoplastic staple fibers and heat-resistant staple fibers using a carding machine and then forming the web.

[0152] The nonwoven fabric preferably used is obtained by entangling and integrating a web obtained by mixing thermoplastic staple fibers and heat-resistant staple fibers, for example, by a needle punching method or a water jet punching method. By carrying out a punching treatment, the fibers of the web can be entangled, thereby improving the abrasion resistance of the nonwoven fabric.

[0153] The needle punching may be performed on one or both sides of the web. If the punching density is too low, the abrasion resistance of the nonwoven fabric becomes insufficient, while if the punching density is too high, the bulk density decreases, and the air volume ratio in the nonwoven fabric decreases, impairing the heat insulating effect and sound absorbing effect. Therefore, the punching density is preferably 50 times / cm. 2 More than 300 times / cm 2 Less than or equal to 50 times / cm, more preferably 2 More than 100 times / cm 2 In the present embodiment, the needle punching process can be performed using a conventional needle punching device and in accordance with a conventional needle punching method.

[0154] The water jet punching process is carried out using an apparatus in which a large number of injection holes having a diameter of 0.05 mm to 2.0 mm are arranged in one or more rows with a hole interval of 0.3 mm to 10 mm, and the injection pressure is 90 kgf / cm. 2 More than 250kgf / cm 2 The punching can be carried out according to a conventional water jet punching method using a water jet punching device that jets high-pressure water as follows. The distance between the jet hole and the web is preferably 1 cm or more and 10 cm or less.

[0155] After the needle punching or water jet punching, the film may be dried in a conventional manner and, if necessary, heat set.

[0156] If the bulk density of a nonwoven fabric made of short fibers is too low, its flame retardancy, heat insulation and sound absorption properties decrease, and if it is too high, its flame retardancy, abrasion resistance and processability decrease. Therefore, the bulk density of the nonwoven fabric made of short fibers is set to 0.01 g / cm. 3 More than 0.2g / cm3 The range must be within the following range. Preferably, it is 0.01 g / cm 3 More than 0.1g / cm 3 Less than or equal to 0.02 g / cm 3 More than 0.08g / cm 3 More preferably, 0.02 g / cm 3 More than 0.05g / cm 3 It is desirable that the range is as follows: By controlling the bulk density of the nonwoven fabric in this way, the proportion of air (oxygen) in the nonwoven fabric is controlled within a certain range, thereby imparting excellent flame retardancy, heat insulation, and sound absorption properties to the nonwoven fabric.

[0157] (metal layer) The metal layer 22 (hereinafter, the same applies to the first metal layer 22A and the second metal layer 22B) is made of a material that has heat insulation properties and improves the sound absorbing effect of the porous layer 21, and is preferably flexible. Examples of materials that constitute the metal layer 22 include aluminum, copper, nickel, permalloy, iron, gold, and silver. In consideration of flexibility and durability, the thickness of the metal layer 22 is preferably 4 μm or more and 12 μm or less. In terms of cost, availability, strength, and the like, the metal layer 22 is preferably an aluminum foil or a copper foil.

[0158] The sound-absorbing sheet used in the sound-absorbing stoma appliance of the present disclosure may have a metal layer opening 23 in the metal layer 22. The planar shape of the metal layer opening 23 may be any appropriate shape such as a circle, an ellipse, a triangle, a rectangle, a polygon, a slit, etc. When there are multiple metal layer openings 23, the planar shapes may be one type or two or more types. Among these shapes, a perfect circle and an ellipse are preferred, and a perfect circle is more preferred, in terms of stably achieving the effects of the present disclosure and ease of production.

[0159] The metal layer 22 and the porous layer 21 may be laminated in a non-adhesive state, but are preferably laminated by bonding using a normal bonding method. As a bonding method, in addition to bonding using a resin tack (for example, made by Nippon Bannock Co., Ltd., product name "Banock", etc.), fusing, sewing, needle punching, bonding with an adhesive, heat embossing, ultrasonic bonding, sinter bonding with an adhesive resin, bonding with a welder, etc., a method of interposing a low-melting point material such as a low-melting point net, low-melting point film, or low-melting point fiber between the metal foil and the porous body, and melting the low-melting point material by heat treatment to bond them can also be adopted. Here, the melting point of the low-melting point material is preferably 20°C or more lower than the fiber used in the porous body. When sinter bonding is used as the above bonding method, powder of a high-temperature adhesive resin (such as nylon 6, nylon 66, polyester, etc.) or a low-temperature adhesive resin (such as EVA (low-melting ethylene vinyl acetate copolymer)) is preferably used. In addition, in the case of adhesion using an adhesive, the adhesive may be either thermoplastic or thermosetting. For example, a method may be used in which a thermosetting epoxy resin is applied to the metal layer 22 or the porous layer 21, the metal layer 22 and the porous layer 21 are laminated, and the resin is thermally cured by further heat treatment.

[0160] The greater the degree of adhesion (adhesion points or adhesion area) between the metal layer 22 and the porous layer 21, the stronger the adhesion between the metal layer 22 and the porous layer 21, but if the degree of adhesion is too great, the sound absorption coefficient decreases. Furthermore, if there is no adhesion at all, the sound absorption coefficient increases, but problems such as peeling during use and difficulty in handling occur. From this perspective, the ratio [{B / (A+B)}×100(%)] of the total adhesion area (B) between the metal layer 22 and the porous layer 21 to the total area (A+B) of the adhesive and non-adhesive parts is preferably 20% or more and 30% or less. If the product is frequently inserted and removed from other components, adhesive may be applied to the entire surface.

[0161] In the sound-absorbing sheet, the metal layer 22 may be laminated on at least one side of the porous layer 21, but may be laminated on both sides of the porous layer 21. Also, at least one layer each of the porous layer 21 and the metal layer 22 may be used and integrated to form a multilayer structure, and the number of layers may be arbitrary.

[0162] (Sound insulation layer) The sound-absorbing sheet used in the sound-absorbing stoma appliance of the present disclosure is preferably configured such that a sound-insulating layer 26 is laminated on the second surface (S2) of the porous layer 21, as in the sound-absorbing sheet 20F illustrated in Fig. 14. This is because the sound transmitted through the porous layer 21 is reflected by the sound-insulating layer 26, thereby making it possible to further reduce the sound emitted from the stoma. Elastic bodies, such as various elastomers, various synthetic rubbers, and natural rubbers, can be used as materials for forming the sound insulation layer 26. Among them, silicone rubber is preferably used because it has stable quality. In order to obtain sound insulation performance while reducing the weight of the sound absorbing sheet and improving handling, it is desirable for the thickness of the sound insulation layer 26 to be 0.5 mm or more and 5.0 mm or less. EXAMPLES

[0163] The sound-absorbing sheet used in the sound-absorbing stoma appliance of the present disclosure will be described in more detail below using examples, but the sound-absorbing sheet is not limited to the following examples. The measurement methods for each characteristic value in the following examples are as follows. Furthermore, unless otherwise specified, parts and % in the examples are based on mass.

[0164] <Sound absorption coefficient measurement> The sound absorption coefficient was measured as the normal incidence sound absorption coefficient using an acoustic tube. Specifically, a Rion 9301 normal incidence sound absorption coefficient measurement system was used, and samples with the same diameter were made using a duct with an inner diameter of Φ100 mm for low frequencies and a duct with an inner diameter of Φ29 mm for high frequencies, and the normal incidence sound absorption coefficient at each frequency was measured according to JIS A 1405-2 "Method of measuring normal incidence sound absorption coefficient of building materials in the tube method." The measurement was performed by attaching the sound absorbing sheet with the metal layer side facing the sound source. Silicone grease (Shin-Etsu Chemical G501) was filled into the gaps and the measurement was performed.

[0165] [Example 1] As the sound absorbing sheet having the configuration shown in FIG. 4, a polyurethane foam "Rubylar (registered trademark) L31" (apparent density 0.16 g / cm) manufactured by Toyo Polymer Co., Ltd. was used as the porous layer 21. 3 The sound absorbing sheet of Example 1 had a pore size of 30 μm or more and 600 μm or less, and a porosity of 85%, and had a thickness of 20 mm. The measurement results of the sound absorption coefficient of the sound absorbing sheet of Example 1 are shown in FIG.

[0166] [Example 2] As the sound absorbing sheet having the configuration shown in FIG. 5, a polyurethane foam "Rubylar (registered trademark) L31" (apparent density 0.16 g / cm) manufactured by Toyo Polymer Co., Ltd. was used as the porous layer 21. 3 A 20 mm thick sheet was used, and a 7 μm thick aluminum foil was used as the metal layer 22. A two-component urethane adhesive was applied to the aluminum foil at 1 g / m2 in a dry state. 2 The above-mentioned "Rubylar (registered trademark) L31" was then placed on top of the coating and heat-treated at 100°C for 3 minutes to obtain a sound-absorbing sheet (aluminum foil / polyurethane foam porous layer) of Example 2. The measurement results of the sound absorption coefficient of the sound-absorbing sheet of Example 2 are shown in Figure 15.

[0167] <Sound absorption coefficient evaluation> The measurement results of Example 1 (single-layer structure of polyurethane foam porous layer) and Example 2 (laminate structure of aluminum foil / polyurethane foam porous layer) are shown in FIG. As is clear from Fig. 15, both Example 1 and Example 2 have a sound absorbing effect. Therefore, in the sound-absorbing stoma appliances equipped with these sound absorbing sheets, it is possible to effectively prevent the discharge sound from the stoma from being heard by others. Here, the frequency range audible to humans (audible range) is between about 20 Hz and 20 kHz, and the frequency range of sounds that can generally be heard well is about 1500 Hz to 4000 Hz. As shown in Fig. 15, the sound-absorbing sheet of Example 2 has a normal incidence sound absorption coefficient of 0.5 or more over the entire frequency range of 1500 Hz to 4000 Hz, which is the frequency range of sounds that can generally be heard well by humans, and is particularly excellent in sound absorption in the frequency range of 1500 Hz to 3500 Hz.

[0168] Although the respective embodiments of the sound-absorbing stoma appliance of the present disclosure have been described above, the sound-absorbing stoma appliance of the present disclosure is not limited to the above-mentioned embodiments. The above-mentioned embodiments are merely examples, and any device having substantially the same configuration as the technical idea described in the claims and exhibiting similar effects is included in the technical scope of the present disclosure in any case. [Explanation of symbols]

[0169] 1, 2, 3 Sound-reducing stoma appliances 11 Face plate 12 Stoma hole 13 Pouch 14 Outlet 20 Sound absorbing sheet 20A, 20B, 20C, 20D, 20E Sound absorbing sheets 20F, 20G, 20H, 20I, 20J Sound absorbing sheet 21 Porous layer 21A First Porous Layer 21B Second porous layer 22 Metal layer 22A First Metal Layer 22B Second metal layer 23 Metal layer opening 24A Recess 24B Notch 25A opening 25B Notch 26 Soundproofing layer 30 Adhesive layer 40 Pockets 40a 1st pocket 40b Slit 40c 2nd pocket 50 Bands 100 Stoma appliances 111 Face plate 112 Stoma hole 113 Pouch 114 Outlet

Claims

1. A base plate that is attached to the skin around the stoma and has a stoma hole through which the stoma is inserted; a pouch connected to the base plate for receiving waste from the stoma; a sound absorbing sheet having a porous layer attached on a surface of the pouch; Equipped with the sound absorbing sheet is removably attached to an outer surface of the pouch opposite to the surface connected to the base plate; The sound absorbing sheet is attached at a position covering the stoma hole when viewed from a direction perpendicular to the base plate, the porous layer of the sound absorbing sheet has a first surface and a second surface opposite to the first surface, and has a recess on the first surface side; the sound absorbing sheet is removably attached onto a surface of the pouch on the side of the first surface of the porous layer; The pouch has an outlet for discharging the contained excrement, the porous layer of the sound absorbing sheet has a notch in a part of an outer periphery of the first surface on the side of the exhaust port, A sound-absorbing stoma appliance, wherein the cutout portion is connected to the recess.

2. A base plate that is attached to the skin around the stoma and has a stoma hole through which the stoma is inserted; a pouch connected to the base plate for receiving waste from the stoma; a sound absorbing sheet having a porous layer attached on a surface of the pouch; Equipped with the sound absorbing sheet is removably attached to an outer surface of the pouch opposite to the surface connected to the base plate; The sound absorbing sheet is attached at a position covering the stoma hole when viewed from a direction perpendicular to the base plate, the porous layer of the sound absorbing sheet has a first surface and a second surface opposite to the first surface, and has a recess on the first surface side; the sound absorbing sheet is removably attached onto a surface of the pouch on the side of the first surface of the porous layer; A sound-absorbing stoma appliance, wherein the depth of the recess is greater than the thickness of the porous layer of the sound-absorbing sheet at the recess.

3. The pouch has an outlet for discharging the contained excrement, the porous layer of the sound absorbing sheet has a notch in a part of an outer periphery of the first surface on the side of the exhaust port, The sound-absorbing stoma appliance according to claim 2 , wherein the cutout portion is connected to the recess.

4. The sound-absorbing sheet, a metal layer on the first surface of the porous layer; The sound-absorbing stoma appliance according to any one of claims 1 to 3, which is removably attached onto the surface of the pouch on the side having the metal layer.

5. A sound-absorbing stoma appliance as described in claim 4, wherein the metal layer comprises aluminum or copper.

6. A sound-absorbing stoma appliance as described in claim 5, wherein the sound-absorbing sheet has a normal incidence sound absorption coefficient of 0.5 or more in the frequency range of 1500 Hz or more and 4000 Hz or less.

7. A base plate that is adhered to the skin around the stoma and has a stoma hole through which the stoma is inserted; a pouch connected to the base plate for receiving waste from the stoma; a sound absorbing sheet having a porous layer attached on a surface of the pouch; Equipped with the sound absorbing sheet is removably attached to an outer surface of the pouch opposite to the surface connected to the base plate; The sound absorbing sheet is attached at a position covering the stoma hole when viewed from a direction perpendicular to the base plate, the porous layer of the sound absorbing sheet has a first surface and a second surface opposite to the first surface, and has a recess on the first surface side; the sound absorbing sheet is removably attached onto a surface of the pouch on the side of the first surface of the porous layer; The sound absorbing sheet is a first metal layer on the first surface of the porous layer; a second metal layer on a bottom surface of the recess; A sound-absorbing stoma appliance that is removably attached onto the surface of the pouch on the side having the first metal layer.

8. A sound-absorbing stoma appliance as described in any one of claims 1 to 7, wherein the sound-absorbing sheet further comprises a sound-proofing layer laminated on the second surface of the porous layer.

9. A sound-absorbing stoma appliance as described in claim 8, wherein the sound-insulating layer comprises silicone rubber.

10. A base plate that is adhered to the skin around the stoma and has a stoma hole through which the stoma is inserted; a pouch connected to the base plate for receiving waste from the stoma; a sound absorbing sheet having a porous layer attached on a surface of the pouch; Equipped with the sound absorbing sheet is removably attached to an outer surface of the pouch opposite to the surface connected to the base plate; The sound absorbing sheet is attached at a position covering the stoma hole when viewed from a direction perpendicular to the base plate, The porous layer of the sound absorbing sheet has a first porous layer and a second porous layer, and the first porous layer has an opening, A sound-absorbing stoma appliance removably attached onto a surface of the pouch on the side of the first porous layer.

11. The pouch has an outlet for discharging the contained excrement, the porous layer of the sound absorbing sheet has a notch in a part of an outer periphery of the first porous layer on the side of the exhaust port, The sound-absorbing stoma appliance according to claim 10, wherein the cutout portion is connected to the opening.

12. A sound-absorbing stoma appliance as described in claim 10 or claim 11, wherein the thickness of the first porous layer is greater than the thickness of the second porous layer.

13. The sound absorbing sheet, a metal layer on the second porous layer; having the first porous layer on the metal layer; The sound-absorbing stoma appliance according to any one of claims 10 to 12.

14. A sound-absorbing stoma appliance as described in any one of claims 1 to 13, wherein the sound-absorbing sheet is attached onto the surface of the pouch via an adhesive layer.

15. A sound-absorbing stoma appliance as described in any one of claims 1 to 14, wherein the sound-absorbing sheet is attached onto the surface of the pouch by a fixing device.

16. A sound-absorbing stoma appliance as described in claim 15, wherein the fixing device has a pocket.

17. A sound-absorbing stoma appliance as described in claim 15, wherein the fixing device has a band.

18. A sound-absorbing stoma appliance as described in any one of claims 1 to 17, wherein the porous layer of the sound-absorbing sheet includes at least one type selected from a polymeric porous body, a nonwoven fabric, and a fibrous material.

19. A sound-absorbing stoma appliance as described in any one of claims 1 to 17, wherein the porous layer of the sound-absorbing sheet contains polyurethane foam.

20. A sound-absorbing stoma appliance as described in any one of claims 1 to 17, wherein the porous layer of the sound-absorbing sheet contains polyester fibers.

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