JP2002317385A - Latex bag and method for producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a latex bag produced by forming a latex layer on the inner surface of a bag, especially a bag of a three-dimensional woven fabric, capable of holding the shape by preventing the excessive inflation by inner pressure and resistant to collapse with outer pressure and provide a method for producing the latex bag. SOLUTION: The latex bag has latex layers 4 on the inner surface of a bag B made of cloth and supporting posts made of latex and fixed on the upper and lower latex layers in the bag. Either one of the upper and lower latex layers is provided with protrusions 10 composed of covered rubber core 101. Accordingly, the inner pressure of the latex bag is supported by the supporting posts and the outer pressure is supported by the protrusions provided with an (inner) core material covered with the latex layer to obtain a latex bag having good cushioning performance to the inner pressure and the outer pressure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a latex bag and a method for producing the same, and more particularly, a protrusion which interferes with compression by external pressure and a support which interferes with expansion by internal pressure, inside a bag made of cloth or the like. The present invention relates to a bag-shaped body provided and a method for producing the same.

[0002]

2. Description of the Related Art A three-dimensional woven fabric is shown in FIG.
And the lower cloth 2. The upper cloth 1 and the lower cloth 2
It has a structure connected by. The ends of the upper cloth 1 and the lower cloth 2 of such a three-dimensional woven cloth are connected by sewing or the like to form a bag-like body B, and the inner surfaces (the outer surfaces of the upper cloth 1 and the lower cloth 2) may be formed. A product such as an air mat or a water bed (latex bag-like body) is manufactured by forming a latex layer 4 on the surface of the connecting yarn 3 (for example, Japanese Patent Application No. 10-206242) (FIG. 7).
reference).

[0003] By using a three-dimensional woven fabric in this way, a connecting thread 3 provided with a latex layer 4 on its surface connects the upper and lower latex layers 4 to support the shape of the product or maintain strength. Since the action of S is performed, it is not necessary to provide a separate support, and a desired latex bag can be easily manufactured. Further, since the strength depends on the connecting yarn 3, the product design of the latex bag can be easily performed. There is an advantage that it becomes.

[0004] When performing a surgical operation on the head, it is common to cool the head, particularly the affected area, and insert a scalpel. As the cooling device for cooling the head, a cooling headgear is used, and the latex bag is used as a cooling bag of the cooling headgear.

[0005] Fig. 8 is a perspective view of the cooling headgear seen from the side. As is clear from this figure, the cooling headgear passes from the forehead of the head to the top of the head, the occipital region, and the shoulder. It has a cooling bag C that covers the part. The cooling sac C is basically in the form of a bag and has a cooling water passage 5 through which cooling water passes.
Are formed in the cooling water passage 5, and a partition wall 6 for controlling the flow of the cooling water is formed. A water supply port 7 for injecting cooling water is provided at a front end of the cooling water passage 5, and a drain port 8 is provided at a rear end.

As shown in a perspective view from the back in FIG. 9, the cooling water passage 5 is formed of two systems such as left and right.

The cooling water supplied from the water supply port 7 on the shoulder is
From the shoulder, it enters the temporal region through the communication port 9 formed in the partition wall 6 provided so as to go around the neck, and rises through the cooling water channel 5 formed by the partition wall 6 formed in the temporal region. Then, similarly, the same cooling water channel 5 is folded back from the communication port 9 formed in the partition wall 6 and descends. After that, it passes through the communication port 9 formed by the partition wall 6 and enters the cooling water channel 5 in the back of the head (see FIG. 4), rises up the cooling water channel 5, and moves from the communication port 9 formed in the partition wall 6 to the head. The water enters the top and is discharged from the drain 8.

That is, from the temporal region to the occipital region, the cooling water channel 5 is, as schematically shown in FIG.
A zigzag cooling water passage 5 is formed.

In the cooling headgear as described above,
As shown in FIG. 7, the internal pressure received from the cooling water passing through the cooling water passage 5 is held by the columns S, and the cooling bag C
Is prevented from expanding. However, when the flow rate of the cooling water is small and the internal pressure is small, when the external pressure is applied, the upper and lower latex surfaces may come into contact with each other and stick, which hinders the smooth flow of the cooling water. Has occurred.

The present invention has been made in view of the above-mentioned problems, and is directed to a latex bag having a latex layer formed inside the bag as described above, particularly a latex layer formed inside a three-dimensional woven fabric. It is an object of the present invention to provide a latex bag-like body which can be kept in shape without being excessively expanded by an internal pressure and which is not crushed by an external pressure, and a method for producing the same.

[0011]

In order to solve the above problems, a latex bag according to the present invention is provided with a latex layer inside a cloth bag, and the upper and lower latex layers inside the bag. A latex bag-like body having a support made of latex fixed thereto, provided with a protrusion made of a rubber core material covered with one of the upper and lower latex layers.

The method for producing a latex bag according to the present invention comprises the steps of: forming a rubber layer on at least one surface of a cloth-made bag-like body; providing a rubber core for the protrusion on the rubber layer;
A step of applying a latex coagulation liquid into the bag-like body, a step of injecting the latex solution into the bag-like body coated with the latex coagulation liquid, and forming a latex layer on the bag-like body surface and the surface of the core material for projections. It is characterized by.

According to the present invention, as described above, the internal pressure of the latex pouch is supported by the struts, while the external pressure is supported by the projections with (inside) the core covered by the latex layer. , A latex bag having good buffering properties against internal pressure and external pressure.
Further, according to the method for producing a latex bag according to the present invention, the latex bag having the above structure can be easily produced.

[0014]

The present invention will be described in more detail. According to the embodiment of the present invention, the three-dimensional woven fabric illustrated in FIG. 6 is used. That is, it has an upper cloth 1 and a lower cloth 2, and has a structure in which the upper cloth 1 and the lower cloth 2 are connected by a plurality of connecting yarns 3. The ends of the upper cloth 1 and the lower cloth 2 of such a three-dimensional woven cloth are connected by sewing or the like to form a bag-like body B.
A latex layer 4 is formed on the inner surface (sometimes formed on the outer surface) of the lower cloth 2 and on the surface of the connecting yarn 3 to form a latex bag.

A cooling water passage 5 through which cooling water passes is formed inside the latex bag, and a partition wall 6 for controlling the flow of cooling water is formed in the cooling water passage 5. The cooling water passes zigzag (see FIG. 1).

The partition 6 is provided with a core 61, which is provided by forming a latex layer 4 on the surface of the core 61. A latex layer 4 is also formed on the surface of the connection yarn 3, and forms a support S.

On the other hand, the latex bag according to the present invention comprises:
A projection 10 is provided on the lower cloth 2 side. The projections 10 are preferably provided uniformly and plurally inside the latex bag. The protrusion 10 is made of a rubber core material 101.
The upper end of the projection 10 has a gap with the latex layer 4 on the upper cloth 1 side, and is not fixed to the latex layer 4 on the upper cloth 1 side. (See FIG. 2).

In this embodiment, the upper cloth 1 and the lower cloth 2
Is provided with a rubber layer 11 on the inner surface thereof. The rubber layer 11 is provided for erecting the core 61 for the wall and the core 101 for the projection, and is not always necessary. Rubber layer 1
1 and the latex layer 4 can be fixed,
Depending on the concentration and form of the latex coagulation liquid, it is possible to keep the rubber layer 11 and the latex layer 4 from adhering. In this embodiment, the rubber layer 11 and the latex layer 4 are not fixed to improve the flexibility of the latex bag.

As shown in FIG. 2, the rubber layer 11 of the three-dimensional woven fabric
When the bag-like body of the latex layer 4 and the latex layer 4 are formed in a double form, it is possible to obtain a latex bag-like body that is flexible and does not leak water.

According to the latex bag having such a structure, the internal pressure is supported by the pillars S, while the external pressure is applied because the latex layer 4 on the upper cloth 1 abuts on the protrusion 10 in which the core material 101 is embedded. Thus, there is no possibility that the cooling water passage 5 will be blocked.

According to the method of manufacturing a latex bag according to the present invention, when the projections 10 are formed on the lower cloth 2 as described above, the rubber layer 11 is formed on at least the lower cloth 2 side.
This forming method is not basically limited. For example, a bag-like body B coated with a latex coagulating liquid and dried is used.
A latex solution can be injected into the inside of the substrate to form a rubber layer 11 of latex. The rubber layer 11 may be sufficiently dried to form a strong rubber layer 11.

On the rubber layer 11, a rubber core material 1 for a projection is provided.
01 and the cooling water channel 5, the wall core 6
1 is temporarily fixed to a predetermined position by means such as bonding (see FIG. 3).

In providing such a core member 101 for projection, a method as shown in FIG. 4 can be employed.
That is, the sponge-shaped mold M having open cells is formed so as to penetrate the projecting hole 12 for forming the projecting core material (when the wall core material is also formed, the wall penetrating the front and back surfaces of the corresponding shape). Hole 13 is also formed). Then, the cloth body 14 is brought into contact with the back surface of the molding die M.

In the molding die M, the side where the cloth body 14 abuts (the bottom surface in FIG. 4) has an open state of open cells, while the side where the cloth body 14 does not abut (the top surface in FIG. 4) is the opening. The latex coagulation liquid does not exude. As a method of keeping the latex coagulation liquid from oozing out, for example, the opening may be closed by smoothing by heat. Further, a water repellent may be applied to the upper surface so that the latex coagulation liquid does not exude.

When the latex solution is applied after the latex coagulation liquid has sufficiently penetrated the mold M, the rubber core 11 on the surface of the cloth 14 as shown in FIG.
And the cloth body in which the wall core material 61 was formed is obtained. That is, the latex coagulation liquid is seeping out on the surfaces of the projection holes 12 and the wall holes 13 and the cloth 14
Since the latex coagulation liquid is seeping out to the side, the latex solution forms the core material 101 for projections and the core material 61 for walls, and also penetrates to the cloth side to form the rubber layer 11. Since the cloth body 14 has voids, the rubber layer 11 of latex is fixed by an anchor effect.

After the latex has solidified, the mold M is removed. In this case, since the latex is solidified and contracted, the mold can be easily removed.

Thereafter, the upper cloth 1 on which the rubber layer 11 is formed is put on the cloth body, sewn in a bag shape, and a connecting thread is formed by sewing the bag-shaped body.
And a lower cloth 2, and a bag-like body made of a three-dimensional woven cloth having a connection yarn can be formed. This bag-like body is upper cloth 1
A rubber layer 11 is formed on the inner surface of the lower cloth 2, and a core material 101 for projections and a core material 61 for walls are formed, and the lower cloth 2 has a rubber layer 11 formed on the inner surface.

As described above, a latex coagulation liquid is injected into the bag-shaped body B having the core material for projection 101 and the core material for wall 61, and the rubber layer 11, the core material for projection 101, and the core material for wall 6 are formed.
A latex coagulation liquid is adhered to 1. Thereafter, a latex solution is injected to form a latex layer 4.

[0029] Such a latex solution is not basically limited in the present invention. For example, natural rubber, chloroprene rubber, SBR and the like can be used. In the present invention, natural rubber latex is particularly preferred from the viewpoint of decomposing and not causing pollution.

The latex coagulating liquid agent may be basically any liquid as long as it coagulates a latex solution described below. Typically, a polyvalent metal salt such as calcium nitrate can be used.

When the latex coagulation liquid is provided inside the bag-shaped body B, when the latex coagulation liquid is injected and dried,
The concentration of the latex coagulant in the latex coagulation liquid is preferably kept low. This is because when the concentration is high, the rubber layer 11 and the formed latex layer 4 adhere to each other by an anchor effect.

In order to prevent the rubber layer 11 and the latex layer 4 from adhering to each other, the latex solution is injected immediately after the latex coagulation liquid is applied (that is, while the latex coagulation liquid is in a liquid state), May be formed. Also in this case, since the liquid layer inhibits adhesion to the rubber layer 11, the formed latex layer 4 can be prevented from adhering to the rubber layer 11.

Further, a latex coagulant can be provided inside the bag-like body B using a sol solution of the latex coagulant. A sol solution containing a latex coagulant is injected into the bag B instead of the latex coagulating liquid, and a gel layer is formed on the inner surface of the bag B by cooling or the like. Such a sol solution of a latex coagulant can be, for example, a sol formed by adding a latex coagulant to polyvinyl alcohol. As the solvent of the sol solution, for example, carboxymethyl cellulose or the like can be used in addition to the above-mentioned polyvinyl alcohol. Such a solvent is preferably water-soluble. This is because it can be washed away with water in a later step.
By washing the gel layer in this manner, a state in which the formed latex layer 4 and the rubber layer 11 do not adhere can be formed.

After forming the latex layer 4 in this manner,
When sufficiently dried, the latex layer 4 condenses and shrinks, so that the rubber layer 11 and the latex layer 4 are separated from each other as shown in FIG. 2, thereby improving the flexibility of the latex bag.

Further, since the latex layer 4 is formed on the surface of the core material 101 for projections, the surface of the core material 61 for walls, and the surface of the connecting yarn 3, the projections 10, partition walls 6, and columns S are provided at predetermined positions. Latex bags can be manufactured.

[0036]

As described above, according to the present invention,
As described above, the internal pressure of the latex bag is supported by the struts, while the external pressure is supported by the projections having the core material (inside) covered by the latex layer, so that the internal pressure and the external pressure are good. It can be a latex bag having a buffering property. Further, according to the method for producing a latex bag according to the present invention, the latex bag having the above structure can be easily produced.

[Brief description of the drawings]

FIG. 1 is a sectional view of a latex bag according to the present invention.

FIG. 2 is an AA cross-sectional view of the latex bag.

FIG. 3 is a partially transparent perspective view when a projection core and a wall core are formed on a three-dimensional woven fabric.

FIG. 4 is a perspective view of a mold for forming a projection core and a wall core;

FIG. 5 is a perspective view showing a structure of a cloth body manufactured by the molding die.

FIG. 6 is a partial perspective view of a three-dimensional woven fabric.

FIG. 7 is a cross-sectional view of a conventional latex bag.

FIG. 8 is a transparent side view of a cooling headgear using a latex bag.

FIG. 9 is a transparent rear view of a cooling headgear using a latex bag.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upper cloth 2 Lower cloth 3 Connecting thread 4 Latex layer 5 Cooling channel 6 Partition wall 61 Core material for wall 10 Projection 101 Core material for projection 11 Rubber layer 12 Hole for projection 13 Hole for wall

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) A47C 27/10 A47C 27/10

Claims (8)

[Claims] 1. A latex bag having a bag-shaped closed latex layer provided inside a cloth bag and a latex support fixed to the upper and lower latex layers inside the bag. 3. A latex bag-like body according to claim 1, wherein a protrusion made of a rubber core material is provided on one of the upper and lower latex layers. 2. The bag-shaped body has an upper cloth and a lower cloth, and is formed by forming a three-dimensional woven cloth in which the upper cloth and the lower cloth are connected by a connecting thread into a bag shape. The latex bag according to the above. 3. The latex bag according to claim 1, wherein the projection is separated from an opposing latex layer. 4. The bag-like body according to claim 1, wherein a rubber layer is fixedly formed on the inner surface of the bag-like body, and the bag-like latex layer is not fixed to the rubber layer. Latex bag. 5. The latex bag according to any one of claims 1 to 4, wherein a partition wall is provided inside the latex bag, and a zigzag cooling water passage is formed. 6. A step of forming a rubber layer on at least one surface of the inside of a bag-like body made of cloth, further providing a core material for a projection on the rubber layer, a step of applying a latex coagulating liquid to the inside of the bag-like body, A method for producing a latex bag-like body, comprising a step of injecting a latex solution into a bag-like body coated with a coagulating liquid to form a latex layer on the inside of the bag-like body and on the surface of the core material for projections. 7. The process according to claim 6, wherein the step of providing the projection core material on the rubber layer is performed by bonding a rubber projection core material to a rubber layer formed in advance in the bag-like body. A method for producing a latex bag. 8. The step of providing the core material for projections on the rubber layer includes the steps of: providing a sponge-shaped mold having open cells and one surface of which is treated so that a latex coagulation liquid does not exude; Providing a projection hole for forming a penetrating projection core material, further impregnating the molding die with a latex coagulating liquid, laying a cloth body on the other surface of the molding die, and applying a latex solution. The method for producing a latex bag-like body according to claim 6, wherein