JPH0712232U - Laminated sheet - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a laminated sheet that can support a human body in stages by a number of points and linear parts connected to it, has excellent breathability in the thickness direction, has a good feel, and is easy to handle. To do. [Structure] In a sheet in which fibrous sheets 2 and 3 are laminated on both sides of a net-like object 1 made of a foam, the thickness of an intersecting portion 5 where the linear parts intersect each other than the thickness of the linear part 4 of the net-like object 1 A laminated sheet characterized by being thickened.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a laminated sheet, and more particularly to a sheet to be laid under a body such as a sheet, a mat, and a cushion.

[0002]

[Prior art]

 It is known that, when a person sleeps or sits down, supporting the body in multiple points rather than supporting it in a flat surface prevents blood circulation disorders and suppresses body weight pressure stress and inflammation on the local skin. . For example, in the case of a sick person or an elderly person who keeps sleeping for a long time, inflammation such as skin ulcer or pressure ulcer may occur, but when using bedding that supports many points, such inflammation is less likely to occur. Conventionally, as a bedding that supports a number of points, a mattress or a bedding that contains a foam sheet having a large number of convex portions or a rubber sheet has been known (Shokai No. 56-135725, No. Heikaihei). No. 5-18359).

[0003]

[Problems to be solved by the device]

 However, in the above-mentioned conventional technology, in which the convex portion is formed to support many points, it is difficult to adjust the hardness because the weight of the human body is supported by the top of a very small area. When rubber or hard foam is used, the convex part presses against the body strongly, which may cause discomfort for some people, and people with weak skin may rather get inflamed. When a soft foam such as soft foam is used, the convex portion is largely deformed by the weight of the body, so that the effect of supporting the point may be weakened, or the convex portion may be sagging. Moreover, since these sheets are formed by forming convex portions on a flat sheet, they have a plate-like shape as a whole, and it is necessary to perform some processing in order to store them by bending or winding. In addition, the air permeability and moisture permeability in the thickness direction were not sufficient. Furthermore, the conventional technology has a structure that includes a spring, cushion body, batting, etc. as a mattress or bedding, so it is difficult to handle, and when the convex sheet is not on the body, It couldn't be replaced easily. The present invention has been made in order to solve the drawbacks of the above-mentioned conventional techniques, and can support a human body and the like stepwise by a large number of points and linear portions connected to the points, which is rich in breathability in the thickness direction and feels. The aim is to provide a laminated sheet that is good and easy to handle.

[0004]

[Means for Solving the Problems]

 That is, in the present invention, in a sheet in which fibrous sheets are laminated on both sides of a net-like object made of foam, the thickness of the intersecting portion where the linear parts intersect is made thicker than the thickness of the linear part of the net-like object. The present invention relates to a laminated sheet.

The present invention will be described below with reference to the drawings. FIG. 1 is a partially cutaway view of the laminated sheet of the present invention, and FIG. 2 is a sectional view of the laminated sheet of the present invention.

As shown in FIGS. 1 and 2, in the laminated sheet of the present invention, fibrous sheets 2 and 3 are laminated on both sides of a net-like material 1 made of foam. Further, the net-shaped material 1 is configured such that the thickness of the intersecting portion 5 where the linear portions intersect is thicker than the thickness of the linear portions 4. That is, in the laminated sheet, the protrusions formed by the intersections 5 are arranged in a multi-point shape (actually, have a constant area), and the protrusions formed by the linear portions 4 having a smaller thickness are formed. It is formed so as to connect the intersections, and the other parts are made of only fibrous sheets and no foam is present. Therefore, when the body is laid on the laminated sheet of the present invention, the body crosses the fibrous sheet to give a strong stimulus to the body 5 and the linear portion 4 which connects the body to give a weak stimulus to the body. Supported by. As a result, the body pressure is dispersed and the capillaries are no longer pressed, so that blood circulation disorders and skin inflammation can be prevented, and this strong and weak stimulus supports the body only with the convex portions. Gives a comfortable feel. In addition, in the laminated sheet of the present invention, even if the foam has a wide range of hardness, the crossed portion 5 and the linear portion 4 support the body in a stepwise manner, and the influence is less likely to occur, and the foam is present. Since there is a portion that does not exist, the effect of supporting the body by the crossing portion 5 and the linear portion 4 is not lost even if the foam body is crushed by weight pressure or the like. Furthermore, since there is a portion where the foam does not exist, high air permeability can be secured in the thickness direction, and it is easy to store by bending or winding.

As the foam forming the net-like material 1 of the present invention, synthetic resin or synthetic rubber such as polyurethane, polyethylene, polypropylene, polyester, polyvinyl chloride, polystyrene, silicone rubber is chemically or mechanically foamed. The above-mentioned products can be preferably used, but polyurethane foams and polyethylene foams are particularly preferable because of their high elasticity. The foam may be closed cells or open cells, but the open cells are more preferable because they can enhance the air permeability and the moisture permeability.

The net-shaped article 1 of the present invention can be obtained by molding the above foam into a net shape in which the thickness of the intersecting portion 5 where the linear portions intersect with each other is larger than the thickness of the linear portion 4. The thickness of the linear portion 4 is preferably 2 to 30 mm, and the thickness of the intersecting portion 5 is preferably 5 to 50 mm. If the thickness is larger than the above range, the laminated sheet as a whole becomes too thick and the handleability is deteriorated. On the other hand, if the thickness is smaller than the above range, the effect of using the net-like material is lost. It is necessary that the thickness of the intersecting portion 5 is thicker than the thickness of the linear portion 4, and the thickness of the linear portion 4 is 20 to 80% of the thickness of the intersecting portion 5, and more preferably 30 to. It should be 70%. Further, the thickness of each portion does not have to be constant, and for example, the cross section of the intersecting portion or the linear portion may have an elliptical shape, a dome shape, or a circular shape as shown in FIG. In this case, the above thickness refers to the value measured at the thickest place.

The size and arrangement of the intersecting portion 5 of the net-like object 1 and the length and width of the linear portion 4 are not particularly limited and may be appropriately determined as necessary. It is desirable that the distance between is in the range of 5 to 150 mm. If the distance is shorter than this, the intersections will be arranged in a row and the unevenness will be lost. Conversely, if the distance is wider than this, there will be too many places without intersections and the unevenness will also be lost. Be seen.

As means for forming a foam into a net-like shape as described above, a synthetic resin or synthetic rubber, which is a material of the foam, and a foaming agent are put in a predetermined net-shaped mold to form the foam. At the same time, there is a means for forming a net-like shape, a means for processing a sheet of a foam body produced in advance into a net-like shape by cutting, cutting, thermoforming or the like. As the net-like material made of such a foam, Nova Ace (trademark) of Nagano Novafoam Co., Ltd. is known. FIG. 3 is an example of a net-like object made of foam used in the present invention. As shown in the partially enlarged view of FIG. 4, an intersection 5 having an elliptical cross section is formed by cutting the ellipse with a long diameter. The linear portion 41 having the semi-elliptical cross section and the linear portion 42 having the lower semi-elliptical cross section are connected to each other. In the net-shaped article of this example, the thickness of the linear portions 41 and 42 is 1/2 of the thickness of the intersecting portion 5. In addition, this net-like object has an elliptic curved surface on the side that comes into contact with the body, so it feels good.

Fibrous sheets 2 and 3 are laminated on both surfaces of the net-like material 1. As the fibrous sheets 2 and 3, sheets made of non-woven fabric, knitted fabric, paper or the like are used alone or in combination. Since the fibrous sheet is in direct contact with the human body, it is recommended to use hydroentangled non-woven fabric, needle punched non-woven fabric, fiber-bonded non-woven fabric, etc., which has little adhesion of adhesives and fiber oils so that body fluids such as sweat and moisture can be absorbed. It is preferable to use a non-woven cloth mainly composed of hydrophilic fibers. In addition, it is desirable to prevent body fluids such as sweat and moisture from remaining on the surface of the fibrous sheet.For the fibrous sheet, it is necessary to use a water repellent surface to prevent moisture from adhering to the surface, or to use moisture. It is desirable to use a fibrous sheet whose surface is water-repellent or hydrophobic and whose inside is made hydrophilic so that it can be quickly absorbed inside the sheet. For example, such a fibrous sheet includes a hydroentangled nonwoven fabric having an upper layer of hydrophilic fibers and a lower layer of hydrophobic fibers, and a hydroentangled nonwoven fabric made of hydrophilic fibers whose surface is treated to be water repellent. . In particular, when strength is required for the laminated sheet, these non-woven fabrics and other strong non-woven fabrics, reinforcing fabrics such as woven fabrics or knitted fabrics may be laminated, or the woven fabrics or knitted fabrics and the fibrous web may be laminated with water. You may use the composite nonwoven fabric integrated by the entanglement.

In some cases, different materials may be used for the front and back of the fibrous sheets 2 and 3, and for example, for the fibrous sheet 2 on the front side that comes into contact with the human body, the above-mentioned hydroentangled nonwoven fabric is used. As the fibrous sheet 3 on the back surface side, a spunbonded non-woven fabric or the like which does not easily slip the laminated sheet and can impart high strength may be used. However, unless otherwise required, it is better to use the same material for the front and back fibrous sheets because it can be used reversibly without distinction between the front and back.

The net-like material 1 and the fibrous sheets 2 and 3 may be adhered to each other by using an adhesive, an adhesive film or the like. It may be adhered using an adhesive material. Alternatively, the fibrous sheets 2 and 3 on the front and back may be joined in a bag shape, and the net-like material may be housed therein. In this way, by laminating the fibrous sheets 2 and 3 on both the front and back surfaces of the net-like material 1, it becomes possible to use the laminated sheet as an underlay sheet for sheets, mats, etc. It can be installed easily without the need for a structure, and can be replaced easily.

[0014]

[Effect of device]

 In the laminated sheet of the present invention, fibrous sheets are laminated on both sides of a net-like object made of foam, and the net-like object has a crossing portion where the linear parts intersect rather than the thickness of the linear part. The thickness is made thicker. Therefore, the laminated sheet of the present invention can support the body by the thick intersections and the thin linear portions, and as a result, the body pressure is dispersed and the capillaries are compressed. Since it disappears, it can prevent blood circulation disorders and skin inflammation. Further, in the laminated sheet of the present invention, since the body is supported stepwise by the intersecting portions and the linear portions, even if the foam has a wide range of hardness, it is unlikely to be affected and the feel to the body is good. . Furthermore, since the foam has a net-like shape and there is a portion where the foam does not exist, the effect of supporting the body at the intersection and the linear part is not lost even when the foam is crushed considerably due to body weight pressure, etc. Highly breathable in the thickness direction. In addition, the laminated sheet of the present invention has a simple structure and is excellent in handleability during replacement and storage. As described above, the laminated sheet of the present invention exhibits excellent effects and is useful as a sheet, a mat, a cushion to be laid under the body.

In the laminated sheet according to the second aspect, since the surface of the fibrous sheet is treated to be water repellent, bodily fluids and water are unlikely to adhere to the surface of the sheet, so that the surface is dry and there is no discomfort.

[Brief description of drawings]

FIG. 1 is a partially cutaway view of a laminated sheet of the present invention.

FIG. 2 is a sectional view of the laminated sheet of the present invention.

FIG. 3 is a net-like object made of foam used in the laminated sheet of the present invention.

FIG. 4 is a partially enlarged view of the net-like object in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Net-like object made of foam 2 ... Fibrous sheet 3 ... Fibrous sheet 4 ... Linear part 5 ... Intersection

Claims (2)

[Scope of utility model registration request] 1. In a sheet in which fibrous sheets are laminated on both sides of a net-like object made of foam, the thickness of the intersecting portion where the linear parts intersect is thicker than the thickness of the linear part of the net-like object. Laminated sheet characterized by. 2. The laminated sheet according to claim 1, wherein the surface of the fibrous sheet is treated to be water repellent.