JP2646311B2 - Tubular membrane for humidification and method for producing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tubular membrane for humidification and a method for producing the same, and provides a novel and useful product as a tubular membrane for a humidifier for humidifying a gas such as air. It is intended to establish an advantageous and accurate manufacturing method.

[0002]

2. Description of the Related Art Humidifiers for humidifying air or the like have hitherto been announced and implemented as such, and one type of such humidifiers is a humidifier using a moisture-permeable membrane. That is, a small space is provided under the condition that water is supplied to the tubular body made of the moisture permeable membrane, and air is supplied between the tubular bodies to obtain humidified blown air. .

[0003] However, as the tubular body of the moisture-permeable membrane employed in the above-mentioned humidifier of the moisture-permeable membrane type, FIG.
As shown in FIG. 2, a material having a gap forming material 12 cut into a predetermined width, such as a synthetic resin net material for forming a gap for supplying water, is used in the moisture permeable membrane tubular body 11. ing. That is, the length of the tubular body 11 is about 5 to 15 m, and the gap forming material 12 is contained therein.
Is set to supply the liquid into the tubular body 11.

[0004]

However, the conventional humidifying tubular body as described above requires a considerable number of man-hours to manufacture. That is, the tubular body 11 and the gap forming material 12 are separately manufactured, and then the gap forming material 12 is
As described above, the gap forming material having a length of at least 5 m and, in some cases, even 15 m or more is set to be inserted into the tube-shaped body 11 which is naturally flexible because of its moisture permeability. Is not easy.

Further, the tubular body 11 needs to have a waterproof property so that water or the like that has entered therethrough does not leak out, and has a fine microstructure structure. On the other hand, the gap forming material 12 has a moderate hardness. When the gap forming material 12 having such hardness is inserted into the fine and flexible tubular body 11, the tubular body 1
1 It is easy to damage tissue.

In order to avoid such disadvantages, the waterproof / moisture permeable membrane is folded in two, a gap forming material 12 is put in the inside thereof, and an adhesive tape 13 is inserted into the end portion by heat while the tape 13 is inserted.
When the method of bonding by melting the adhesive tape 13 is adopted, the position of the adhesive tape 13 is easily shifted due to the gap forming material 12 inside, so that the adhesive tape 13 is further heated and bonded once using the adhesive tape 13. As shown in FIG. 6, it is necessary to reinforce with an adhesive tape 14 using a waterproof and moisture-permeable membrane material.

[0007] For these reasons, the tubular body is considerably expensive, and it is difficult to obtain the tubular body itself having a stable constant performance, and the gap forming material 12 has a net-like structure. The effect cannot be stably obtained because the structure must be formed to inhibit the flow of the liquid inside the tubular body to some extent.

[0008]

SUMMARY OF THE INVENTION The present invention has been studied to solve the technical problems of the conventional humidifying tubular membrane as described above, and a specific gap forming material is provided between the waterproof and moisture permeable membrane. In this regard, the present invention succeeded in obtaining a product capable of exerting a stable humidification purpose over a long period of time by adopting a specific relationship at a simple and low cost, as follows.

(1) A plurality of extruded members are arranged in a tube along a waterproof moisture-permeable membrane along the longitudinal direction of the tube, and the extruded member is connected to the tube. A humidifying tubular film body having an adhesive portion formed therebetween. (2) A waterproof and moisture-permeable membrane is sequentially bonded to form a tube.
Extrusion molding of multiple extruded materials in order to shape
And bonding to the waterproof and moisture-permeable membrane.
A method for producing a humidifying tubular membrane. (3) Apply a hydrophilic resin film to the waterproof and moisture-permeable membrane material.
Then, an extruded material is formed of a hydrophilic resin on the coating surface.
Characterized in that they are arranged and bonded.
The tubular membrane for humidification according to item (1). (4) Apply a hydrophilic resin coating to the waterproof and moisture-permeable membrane material.
Then, an extruded material is formed of a hydrophilic resin on the coating surface.
Characterized in that they are arranged and bonded together.
(2) The method for producing a tubular membrane for humidification according to the above (2).

[0010]

[0011]

The waterproof and moisture-permeable membrane used in the present invention is required to have a waterproof property necessary for retaining water supplied to the tubular body and a moisture retaining property for transmitting humidified blown air out of the tubular body. Although a known waterproof and moisture-permeable membrane that achieves this purpose can be used, the use of a polytetrafluoroethylene porous membrane is preferred in view of durability and the like.

As the extruded material used in the present invention, a resin which can be extruded and has an adhesive property to a tubular body can be used. Considering the processability of the humidifying tubular film, a flexible resin such as soft vinyl chloride or low-density polyethylene can be suitably used.

It is useful to apply a hydrophilic resin film to the waterproof and moisture-permeable membrane material. Generally, a waterproof and moisture-permeable membrane has water repellency. However, if it is contaminated with oil, an oily substance, or a surfactant, its water repellency is reduced, and the waterproof property is impaired. In particular, there has been a problem with mixing of machine oil mixed during machining or detergent used for removing water residue during maintenance. Use of a hydrophilic resin is effective in solving such a problem.

Examples of the hydrophilic resin include a polyurethane resin containing oxyethylene groups in an amount of 30% or more by weight and a prepolymer thereof, and a polyester resin containing oxyethylene groups in an amount of 30% or more by weight and a prepolymer thereof. , A sulfonic acid group on a terminal group or a pendant group,
Resins containing an amino group, a hydroxyl group, and a carboxyl group (for example, ion exchange resins having a flexible shape) and the like can be used. The thickness of the hydrophilic resin film is usually 3 to 400 μm, preferably 5 to 30 μm. Further, its moisture permeability is at least 1000 g / m ^2.
-Day or more, preferably 5 × 10 ^{3 to} 9 × 10 ⁶ g /
m ² · day.

As described above, when a hydrophilic resin film is applied to the waterproof and moisture-permeable membrane material, it is preferable to use a hydrophilic resin as the extruded material in order to impart good adhesiveness.

[0017]

A plurality of extruded materials are disposed in parallel along the length of the tubular body in the tubular body made of the waterproof and moisture-permeable membrane, so that water and other water can be appropriately applied to the tubular body made of the waterproof and moisture-permeable membrane. The liquid inlet gap is formed to smoothly supply the liquid inside the tubular body, thereby properly achieving the humidification purpose.

By forming an adhesive portion between the extruded material disposed in the tubular body and the tubular body, each extruded material can be accurately formed with approximately predetermined intervals in the tubular body. The tubing body which is set and has a fine structure and is highly flexible is given shapeability, and the tubing body for humidification is appropriately set as in a humidifier. In addition, the liquid in the tubular body can flow smoothly along the extruded material.

When the waterproof and moisture-permeable membranes are sequentially bonded and formed into a tube shape, a plurality of extruded materials are sequentially extruded, and a desired process of humidification is performed in a single step by performing an adhesive treatment on the waterproof and moisture-permeable membranes. To obtain a tubular body. That is, the tube-shaped body and the gap-forming material are separately manufactured as in the related art, and the three steps of inserting the gap-forming material into the tube-shaped body are completed in one step, thereby significantly simplifying the manufacturing.

In particular, the elimination of the step of inserting and setting the gap forming material into the tube-shaped body significantly reduces the number of man-hours, and further damages the waterproof and moisture-permeable tube-shaped body having a fine structure and performing a delicate action. Work around.

In the present invention, disposing the extruded material in parallel along the longitudinal direction of the tubular body means that:
The extruded material is basically positioned at the same interval, not only when the extruded material is in a linear state, but also in a state where it is bonded to the membrane surface in a bent state in a waveform or the like. Depending on the case, the bent extruded material may be positioned by repeating the approach and the separation. That is, there is no problem unless the flow of liquid in the tubular body is obstructed.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the accompanying drawings, a specific embodiment of the present invention as described above will be described. As shown in FIG. 1, upper and lower membrane materials 1, 2 which are waterproof and moisture-permeable porous membrane materials. Extruder 1 while unwinding
0, a plurality of extruded materials 3 are sent out onto the lower film material 2, and these extruded materials 3 are bonded to either the lower film material 2 or the upper film material 1, and then the side of both film materials 1, 2 The edge portion is welded by heat rolls 4 and 4, and the product 5
Take up as.

If necessary, an end bending jig 6 is attached to the lower film material 2 to form a folded portion 2a at the end as shown in FIG. 2, and an adhesive 7 is supplied to the folded portion 2a. To adhere to the upper film material 1. By forming a urethane coating on the inner surface of each of the film materials 1 and 2 as shown in FIG. 2, oil resistance, stain resistance and the like can be appropriately obtained. Also adopts the same urethane type,
Stable adhesion is obtained as a similar material.

The state of adhesion by the heat rolls 4 and 4 is as shown in FIG. 3 in which the extruded material 3 and the lower film material 2 are adhered and the extruded material 3 and the upper film material 1 are adhered to each other. It is preferable not to adhere in order to allow liquid to pass through. The bonding between the extruded material 3 and the film material 2 or 1 is not necessarily required to be completely adhered in the entire length direction. It is sufficient that the film is held at a required distance to either one or both of them, so that partial bonding may be used, or, of course, the film materials 1 and 2 may be partially bonded alternately.

Further, as for the bonding of the upper and lower membrane materials 1 and 2, a bonding portion 8 or 9 as shown in FIG. 4 is separately formed, and even under the condition where the peeling force or the tensile force acts by the water injection pressurization inside. Stable adhesion can be obtained.

As a specific production example, the porosity of the polytetrafluoroethylene by stretching is 80%, and the maximum pore diameter is
A waterproof and moisture permeable membrane material having a thickness of 50 μm and a urethane resin coating of 50 μm was used as the above membrane materials 1 and 2. The upper membrane material 1 was 165 mm wide and the lower membrane material 2 was 185 mm.
, Each having a length of 200 m.

Using the film materials 1 and 2 prepared as described above, a polyurethane extruded material 3 having a height of about 2 mm and a width of about 1 mm is discharged from the extruder 3 by the method shown in FIG. Adhered on the lower film material 2 and the end is 5mm
The upper film material 1 is superimposed on the lower film material 2 which has been folded back, and the heat rolls 4 and 4 are heated at 120 ° C. at 1 kg / cm ² ,
The sheets were adhered by applying heat and pressure under the condition of 1 second, and were wound as a product.

That is, the desired tubular membrane can be easily produced in a single step as shown in FIG. 1 at a production speed of at least 0.5 m / min, generally 3 to 5 m / min or more. Further, by forming the bonding portion under the conditions shown in FIG. 1, a bonding structure capable of withstanding a preferable tensile force as shown in FIG.
It was confirmed that the adhesion was appropriate without peeling under a water pressure condition of about / cm ² .

That is, the tube-like membrane obtained as described above was cut to a length of 10 m, and was cut through a water injection tube having an inner diameter of 4 mm, an outer diameter of 6 mm, and a length of 20 cm.
When the water is supplied from the water tank set at the position of cm and water is injected at a water injection amount of 4.5 liters, the average water injection time is 15 minutes (14 to 16 minutes), which is a preferable tubular membrane for humidification. confirmed.

[0030]

According to the present invention as described above, this kind of humidifying tubular membrane, which had to be formed into a multistage process such as a conventional three-stage process, can be mass-produced in a single process.
Moreover, it can be obtained as a good quality product, so that it is a low-cost product with little loss, and the effect of smoothly supplying a liquid such as water for humidification can be obtained. It is a great invention.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing one example of a manufacturing operation for a humidifying tubular membrane according to the present invention.

FIG. 2 is an explanatory view showing a sectional structure of a lower film material.

FIG. 3 is a cross-sectional view of a bonding operation state by the heat roll.

FIG. 4 is a partial cross-sectional view of an adhesive structure between an upper film material and a lower film material.

FIG. 5 is a partial sectional view similar to FIG. 4 showing another embodiment thereof.

FIG. 6 is a cross-sectional view showing a typical example of a humidifying tubular body according to a conventional method.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 upper film material 2 lower film material 2 a folded portion 3 extruded material 4 heat roll 5 product 6 end bending jig 7 urethane coating 8 bonded portion 9 bonded portion 10 extruder 11 conventional moisture-permeable membrane tube Body 12 The gap forming material 13 The adhesive tape 14 The reinforcing tape

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location B29L 31:14 (72) Inventor Shigeo Makimura 1-3-3 Komabacho, Nakatsugawa City, Gifu Prefecture Mitsubishi Electric Corporation (72) Inventor Shoji Yokoya 1-3-3 Komabacho, Nakatsugawa City, Gifu Prefecture Inside Nakatsugawa Works, Mitsubishi Electric Corporation

Claims (4)

(57) [Claims] 1. A plurality of extruded materials are arranged in a tubular body made of a waterproof and moisture-permeable membrane along a longitudinal direction of the tubular body, and a plurality of extruded materials are arranged between the extruded material and the tubular body. A humidifying tubular film, wherein an adhesive portion is formed on the tubular film. 2. A humidifier, wherein a plurality of extruded materials are sequentially extruded and adhered to the waterproof and moisture-permeable membrane when the waterproof and moisture-permeable membranes are sequentially adhered to form a tube. For producing a tubular membrane for use 3. subjected to a coating of hydrophilic resin to waterproof moisture-permeable film material, according to claim 1, characterized in that the adhesion with molding disposed extruded material with a hydrophilic resin in the coating film surface Humidifying tubular membrane. 4. A coating of a hydrophilic resin on a waterproof and moisture-permeable membrane material.
Extruded with a hydrophilic resin on the coating surface
Molding and disposing and bonding
3. The method for producing a tubular membrane for humidification according to claim 2.