WO2014021552A1 - Porous waterproof component, porous waterproof film, and vehicle electronics - Google Patents

Abstract

The present invention relates to a porous waterproof component, a porous waterproof film, and vehicle electronic unit, and the porous waterproof component (1) mountable on a housing body (110) having a porous opening part comprises: a cylindrical porous path forming member (20) for forming a porous path (R) between an internal space (110a) and an external space (110b) of the housing body (100); and a porous waterproof film (10A) provided in the porous path forming member (20) so as to close the porous path, the porous waterproof film (10A) having a nano-fiber layer made from a water repellent nano-fiber. The porous waterproof film (10A) is preferably made from only the water repellent nano-fiber or is made from the water repellent nano-fiber and a reinforcing material layer laminated on the water repellent nano-fiber, and can properly adjust the internal pressure of the vehicle electronic unit through high air-permeability as well as water repellency.

Description

Breathable waterproof parts, breathable waterproof membrane and automotive electronics

The present invention relates to breathable waterproof parts, breathable waterproof membranes and automotive electronics.

DESCRIPTION OF RELATED ART Conventionally, the breathable waterproof part used for the pressure-resistant adjustment parts of automotive electronics, etc. is known (for example, refer patent document 1). In addition, in this specification, a ventilation waterproof component means the component provided with the ventilation waterproof membrane which has waterproofness and breathability. In addition, in this specification, "waterproof" means preventing not only the passage of water but also the passage of liquids other than water.

It is a figure shown in order to demonstrate the ventilation waterproofing component disclosed by patent document 1. As shown in FIG. The ventilation waterproofing part (referred to as a conventional ventilation waterproofing part) 800 disclosed in Patent Document 1 is a ventilation waterproofing part that can be attached to the housing body 910 having an opening for ventilation, and the internal space of the housing body 910 ( A ventilation path forming member 810 having a ventilation path of the 910a and the outer space 910b, a ventilation waterproof membrane 820 provided in an upper end opening of the ventilation path forming member 810, and the ventilation waterproof membrane ( A cover 830 mounted to the vent path forming member 810 is provided to protect the 820.

On the other hand, in the conventional air-permeable waterproof part 800, the air-permeable waterproof membrane 820 is made of a porous resin film, and the air-permeable waterproof membrane 820 (also referred to as conventional air-permeable waterproof membrane 820) has a thickness of 1. It is described in patent document 1 that it is 5 micrometers-5 micrometers, and air permeability is 0.1-300 sec / 100 cm <3> in a Gurley mold method, and a water pressure is 1.0 KPa or more.

When this type of breathable waterproof part is used for automotive electronics, it is important that the breathable waterproof part 800 has not only waterproof but also high breathability. This is for preventing the problem that the inside of the housing body of the said automotive electronic component becomes high temperature by the operation of the automotive electrical component, and the internal pressure of a housing body rises. In order to prevent such a problem, the ventilation waterproof part is attached for the internal pressure adjustment of the housing body of the automotive electronics.

In particular, when the automotive electrical equipment is a head lamp unit of an automobile, the inside of the housing of the head lamp unit becomes high temperature when the lamp is turned on, and the internal pressure of the housing body increases significantly. For this reason, in order to enable adjustment of the internal pressure of the housing of the headlamp unit, a ventilation waterproofing part is attached.

In the case of using the above-mentioned conventional ventilation waterproofing component, such a ventilation waterproofing component, in the conventional ventilation waterproofing component, since the ventilation waterproofing membrane used for the ventilation waterproofing component is made of a porous resin film, a problem remains in that it is breathable. There is a problem that it is impossible to properly adjust the internal pressure of an automotive electronic device.

Accordingly, the present invention has been made to solve the above-described problems, and thus, having a high air permeability as well as water resistance, the air permeable waterproof component capable of appropriately adjusting the internal pressure of the automotive electrical appliance and the air permeable waterproof membrane usable for the air permeable waterproof component It aims to provide. In addition, by mounting the ventilation waterproofing part of the present invention, it is possible to adjust the appropriate internal pressure, and to provide an automotive electronic device having high quality and high safety.

[1] The ventilation waterproof part of the present invention is a ventilation waterproof part that can be mounted to a housing having an opening for ventilation, and has a tubular ventilation path forming member for forming a ventilation path between an inner space and an outer space of the housing body; And a ventilation waterproof membrane provided on the ventilation path forming member to close the ventilation pathway, wherein the ventilation waterproof membrane has a nanofiber layer made of a water repellent nanofiber.

According to the ventilation waterproofing part of this invention, by having a water-repellent nanofiber layer as a ventilation waterproofing membrane, it can be set as the ventilation waterproofing part which has not only waterproof but high breathability. For this reason, by mounting the ventilation waterproofing part of this invention to an automotive electrical component, the internal pressure adjustment of the automotive electrical component can be performed suitably.

[2] In the waterproof waterproof component of the present invention, the ventilation waterproof membrane is preferably composed of a water-repellent nanofiber layer made of a water-repellent nanofiber.

By setting it as such a structure, a ventilation waterproof membrane can be made into a simple structure, and manufacture of a ventilation waterproof membrane can be made easy. Thereby, the cost of a ventilation waterproofing component can be kept low.

[3] In the ventilation waterproofing component of the present invention, the ventilation waterproofing membrane preferably has a thickness of 5 µm to 50 µm in the water repellent nanofiber layer.

By setting the thickness of the water repellent nanofiber layer in such a range, the strength and air permeability of the air permeable waterproof membrane can be ensured appropriately, and the handling (handling) of the air permeable waterproof membrane can be facilitated.

[4] In the ventilation waterproof component of the present invention, the ventilation waterproof membrane preferably has a water repellent nanofiber layer made of a water repellent nanofiber, and a reinforcing material layer laminated on the nanofiber layer.

Thus, by making the air-permeable waterproof membrane into a structure in which a reinforcing material layer is laminated on the water-repellent nanofiber layer, the strength of the air-permeable waterproof membrane can be increased, the durability of the air-permeable waterproof membrane can be improved, and the handling of the air-permeable waterproof membrane is easier can do.

[5] The breathable waterproof component of the present invention, wherein the total thickness of the water-repellent nanofiber layer made of the water-repellent nanofiber and the reinforcing material layer is in a range of 50 µm to 150 µm, and the water-repellent nanofiber layer is included in the total thickness. The ventilation waterproofing part characterized by the above-mentioned. The thickness is 1 micrometer-30 micrometers.

By making the thickness of the ventilation waterproof membrane such a thickness, the strength and breathability of the ventilation waterproof membrane can be ensured appropriately, the durability of the ventilation waterproof membrane can be improved, and the handling of the ventilation waterproof membrane can be made easier.

[6] In the waterproof waterproof component of the present invention, the water-repellent nanofibers preferably have an average diameter in the range of 50 nm to 500 nm.

By forming a water-repellent nanofiber layer with the water-repellent nanofibers having such a fiber diameter, it is possible to obtain a breathable waterproof membrane having excellent water resistance and breathability.

[7] In the waterproof waterproof part of the present invention, the porosity of the water-repellent nanofibrous layer is 65% to 85%, and the average value of the pore size is 0.1 µm to 3 µm. It is preferable that it is / cm <2> / sec.

The water-repellent nanofiber layer has such a porosity, an average value of the pore size, and air permeability, thereby providing a high waterproof and breathable waterproof membrane having high breathability.

[8] In the waterproof waterproof component of the present invention, the water-repellent nanofiber is preferably made of water-repellent polyurethane (PU) or water-repellent polyvinylidene fluoride (PVDF).

When the water repellent nanofibers are made of water repellent polyurethane (PU) or water repellent polyvinylidene fluoride (PVDF), it is possible to obtain a breathable waterproof membrane having excellent waterproof and breathability.

[9] In the ventilation waterproofing part of the present invention, it is preferable to further include a cover attached to the ventilation path forming member so as to protect the ventilation waterproof membrane and ensure the ventilation path.

By providing such a cover, the ventilation waterproof membrane can be protected in a state where the ventilation path is secured, and damage and contamination of the ventilation waterproof membrane can be suppressed.

[10] In the ventilation waterproofing part of the present invention, it is preferable that the ventilation waterproofing part is used as an internal pressure regulating part of an automotive electric component.

By using the ventilation waterproofing part of this invention as a pressure-resistant adjustment part of automotive electronics, the internal pressure adjustment of the automotive electrical equipment can be performed suitably.

[11] The ventilation waterproof membrane of the present invention is a ventilation waterproofing component having a ventilation passage member that has a cylindrical ventilation path formed between an inner space and an outer space of a housing body having an opening for ventilation, and closes the ventilation path. A breathable waterproof membrane is installed so as to, characterized in that having a nanofiber layer made of water-repellent nanofibers.

By having a water repellent nanofiber layer as a ventilation waterproof membrane, it can be set as the ventilation waterproof membrane which has not only waterproofness but a higher breathability. For this reason, by mounting the ventilation waterproofing part provided with the ventilation waterproofing membrane of this invention to automotive electronics, the internal pressure adjustment of the automotive electrical equipment can be performed suitably. Moreover, also in the ventilation waterproof film of this invention, it is preferable to have the characteristics as described in said [2]-[8].

[12] The electrical equipment for automobiles of the present invention is an automotive electrical equipment having a ventilation waterproofing component mounted on a housing having an opening for ventilation, and the ventilation waterproofing component is waterproofing ventilation according to any one of [1] to [10]. It is characterized by being a component.

Thus, by providing the ventilation waterproofing part as described in any one of [1]-[10] as an ventilation ventilation waterproofing part, proper internal pressure adjustment is attained and it can be set as the automotive electrical equipment which has high quality and high safety.

The present invention provides a ventilation waterproofing part capable of appropriately adjusting the internal pressure of an automotive electrical component by having not only waterproofness but also high ventilation, and a ventilation waterproofing film usable for the ventilation waterproofing part. Moreover, by mounting the ventilation waterproofing part of the present invention, it is possible to appropriately adjust the pressure resistance, and to provide an automotive electric appliance having high quality and high safety.

1 is a cross-sectional view for explaining the ventilation waterproofing part 1 according to the first embodiment.

FIG. 2 is an enlarged view of the ventilation waterproof membrane 10A shown in FIG. 1.

FIG. 3 is a flowchart for explaining an example of a step for producing the ventilation waterproof membrane 10A according to the first embodiment.

4 is a diagram for explaining the automotive electronic device 100 according to the first embodiment.

FIG. 5 is a diagram for explaining the ventilation waterproof membrane 10B according to the second embodiment.

FIG. 6 is a flowchart for explaining an example of a process for producing the air-permeable waterproof film 10B according to the second embodiment.

It is a figure shown in order to demonstrate the ventilation waterproofing component disclosed by patent document 1. As shown in FIG.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described.

Embodiment 1

1 is a cross-sectional view for explaining the ventilation waterproofing part 1 according to the first embodiment. 1 (a) is a longitudinal cross-sectional view of the ventilation waterproofing part 1, and FIG. 1 (b) is a sectional view of the x-x line in FIG. 1 (a).

FIG. 2 is an enlarged view of the ventilation waterproof membrane 10A shown in FIG. 1. 2A is a plan view of the air-permeable waterproof film 10A, and FIG. 2B is an sectional view taken along the line x-x in FIG.

As shown in FIG. 1, the ventilation waterproofing part 1 which concerns on Embodiment 1 forms the ventilation waterproofing membrane 10A (it may also be called the ventilation waterproofing membrane 10A concerning Embodiment 1), and a ventilation path | route. A cylindrical ventilation path forming member 20 and a cover 30 are provided.

As shown in FIG. 2, the air-permeable waterproof membrane 10A according to the first embodiment has a disc shape and consists only of the water-repellent nanofiber layer 11 made of a water-repellent nanofiber. The diameter of the air-permeable waterproof membrane 10A is about 20 mm, and the thickness (the thickness t1 of the water-repellent nanofibrous layer 11 is preferably within the range of 5 µm to 50 µm in consideration of strength and breathability. The thickness t1 of the ventilation waterproof membrane 10A is exaggerated and drawn with respect to the magnitude | size of the said ventilation ventilation membrane 10A.

By setting the thickness t1 of the air-permeable waterproof membrane 10A in such a range, the strength and air permeability of the air-permeable waterproof membrane 10A can be ensured appropriately, and the handling of the air-permeable waterproof membrane 10A is easy. can do. Moreover, as a specific example of "easy handling of the ventilation waterproof membrane 10A," management of the ventilation waterproof membrane 10A manufactured in large quantities becomes easy, and the ventilation path forming member 20 is passed through the ventilation waterproof membrane 10A. The workability at the time of installation (attachment) can be mentioned.

As a polymer which becomes a raw material of the water repellent nanofiber which comprises the water repellent nanofiber layer 11, water repellent polyurethane (PU) or water repellent polyvinylidene fluoride (PVDF) can be used preferably. In addition, the average diameter of the water repellent nanofibers of the water repellent nanofiber layer 11 is in the range of 50 nm to 500 nm. In addition, the porosity of the water repellent nanofiber layer 11 is in the range of 65% to 85%, and the average value of the pore size is in the range of 0.1 μm to 3.0 μm.

In addition, the pore size at the time of obtaining the average value of the pore size can be calculated | required as a mean pore size, for example, on the assumption of the circle | round | yen which has an area equivalent to the area of each pore.

The air-permeable waterproof membrane 10A having such a structure has an air permeability in the range of 0.2 cm 3 to 1.0 cm 3 / cm 2 / sec in the prazil-type method, and the water resistance of the air-permeable waterproof membrane 10A is at least about 10000 mmH ₂ O. It was confirmed by the experiment.

Next, the process for manufacturing the ventilation waterproof film 10A which concerns on Embodiment 1 is demonstrated.

FIG. 3 is a flowchart for explaining an example of a step for producing the ventilation waterproof membrane 10A according to the first embodiment. First, base materials, such as a long sheet-like paper, are set to the release roller of a conveyance mechanism (not shown), and the said base material is conveyed at a predetermined conveyance speed (substrate conveyance process S1). And the water-repellent nanofiber layer which consists of water-repellent nanofibers is formed by electrospinning a water-repellent polymer on the surface of the base material unwound from a unwinding roller (water-repellent nanofiber layer forming process (S2)).

Specifically, in the water repellent nanofiber layer forming step (S2), first, a polymer solution constituting the water repellent nanofiber is supplied to a nozzle unit through a polymer solution supply unit of an electric field radiating device (not shown), and each nozzle of the nozzle unit The polymer solution is discharged, thereby forming a water repellent nanofiber layer on the surface (one side) of the substrate. Here, as a polymer used as a raw material of a water repellent nanofiber, in this case, water repellent polyurethane (PU) or water repellent polyvinylidene fluoride (PVDF) is used.

Thereby, the elongate sheet-like laminated body by which the water repellent nanofiber layer 11 was laminated | stacked on the base material is manufactured. The long sheet-like laminate thus produced is punched into a disk shape having a predetermined diameter (punching step S3).

By performing such a step sequentially, the ventilation waterproof membrane 10A shown in FIG. 2 can be manufactured in large quantities. In addition, in this step, since a base material such as paper is attached to the nanofiber layer 11, the base material is removed when the air-permeable waterproof film 10A is attached to the air flow path forming member 20. Moreover, if the air permeability of a base material is larger than the air permeability of the water repellent nanofiber layer 11, and the thickness which totaled the thickness of the base material and the thickness of the water repellent nanofiber layer 11 is not too thick (for example, 150 micrometers or less), It is also possible to use the thing with the base material as a ventilation waterproof membrane 10A.

Subsequently, the ventilation path forming part 20 and the cover 30 will be described (see FIG. 1).

The ventilation path forming member 20 is made of synthetic resin and the like, and has an inner cylindrical shape. In the ventilation path forming member 20 having such a structure, a cavity inside thereof forms a ventilation path, and a ventilation waterproof membrane 10A is provided at one end (called an upper end) to close the ventilation path. In addition, the outer diameter of the vent path forming member 20 is made substantially the same as the outer diameter of the vent waterproof membrane 10A. As a method of providing the ventilation waterproof membrane 10A to the ventilation path forming member 20, various methods, such as an adhesive method by an adhesive agent, a heating welding method, and an ultrasonic welding method, can be used, for example.

On the outer side surface of the ventilation path forming member 20, the blade portion 21 circumscribes the outer surface along the circumferential direction at a midway position in the height direction (direction along the z axis) of the ventilation path forming member 20. It is formed to. And the convex wall 22 is formed in several places (for example, three places) along the circumferential direction between the blade | wing part 21 and the upper end part of the ventilation path formation member 20. As shown in FIG. The convex walls 22 are formed at predetermined intervals (called equal intervals) along the circumferential direction.

Further, a plurality of cut portions (called three) are formed in a portion between the blade bottom portion 21 and the lower end portion of the ventilation path forming member 20 in the height direction of the ventilation path forming member 20. Thereby, the ventilation path | route formation member 20 has a structure which has several (for example, three) leg 23 in the part between the blade bottom part 21 and the lower end part. Further, at the distal end of each leg 23 (lower end of the ventilation path forming member 20), a jaw 23a protruding outward is formed. When the leg portion 23 configured as described above is applied to hold the jaws 23a of the leg portion 23 and presses it in the direction of the central axis, a repulsive force that resists the pressing force is generated.

The cover 30 is mounted so as to cover the ventilation path forming member 20 in the state where the ventilation waterproof membrane 10A is installed, on the side of the upper end of the ventilation path forming member 20. When the cover 30 is attached to the ventilation path forming member 20, the inner surface of the cover 30 is in a state of being in close contact with the convex wall 22 of the ventilation path forming member 20.

In addition, when the cover 30 is mounted on the vent path forming member 20, the cover 30 protrudes horizontally to the lower end of the convex wall 22 of the vent path forming member 20. Contact the horizontal projection (22a). Thus, in the state in which the lower end part of the cover 30 contacted the horizontal protrusion 22a, the predetermined space 30a is formed between the upper inner wall of the cover 30 and the ventilation waterproof film 10A.

The cover 30 may be detachably attached to the ventilation path forming member 20. For example, the cover 30 may be fixed to the ventilation path forming member 20 by an adhesive or the like.

By attaching the cover 30 to the ventilation path forming member 20 in this manner, a predetermined space 30a is formed between the upper inner wall of the cover 30 and the ventilation waterproof membrane 10A, and the cover ( The inner surface of the inner surface of the portion 30 that is not in contact with the convex wall 22 of the ventilation path forming member 20 and the convex wall 22 of the outer surface of the ventilation path forming member 20 are not formed. The space | interval 30b of predetermined space | interval is formed between the outer side surfaces of a part.

The spaces 30a and 30b function as a distribution path (ventilation path) of air between the cover 30 and the ventilation waterproof membrane 10A. Such spaces 30a and 30b are formed between the cover 30 and the ventilation waterproof membrane 10A so as to pass through the inside of the ventilation path forming member 20 at the lower end of the ventilation path forming member 20. , The ventilation path R passing through the ventilation waterproof membrane 10A and passing through the spaces 30a and 30b is formed. Of course, a reverse ventilation path is also formed. In this way, the cover 30 has a function of protecting the air-permeable waterproof membrane 10A while securing a ventilation path.

In addition, the convex wall 22 formed on the outer surface of the ventilation path forming member 20 and the horizontal protrusion 22a protruding from the convex wall 22 serve to keep the cover 30 in close contact with each other. It is for realizing the role of forming the spaces 30a and 30b between the path forming member 20 and the cover 30. Therefore, the vent path forming member 20 is shown in FIG. It is not limited to the structure with the convex wall 22 and the horizontal protrusion 22a shown in figure.

4 is a diagram for explaining the automotive electronic device 100 according to the first embodiment. 4: (a) is an external perspective view of the automotive electrical equipment 100, and FIG. 4 (b) is sectional drawing which expands and shows the part shown by the broken line border A of FIG. 4 (a). In addition, the headlamp unit of an automobile is illustrated here as the automotive electronics 100. As shown in FIG.

The headlamp unit (hereinafter referred to as the headlamp unit 100) as the automotive electronic device 100 is a housing body 110 (headlamp housing body 110) of the headlamp unit 100, as shown in FIG. ), A lamp mounting socket 120 installed in the head lamp housing 110, a lamp 130 detachably attachable to the lamp mounting socket 120, and light emitted from the lamp 130. The reflecting plate 140 which reflects this, and the ventilation waterproofing part 1 which functions as an internal pressure adjusting part which adjusts the pressure (inner pressure) of the internal space 110a side of the head lamp housing 110 are provided.

The ventilation waterproofing part 1 is attached to the ventilation waterproofing part mounting hole 111 as an opening for ventilation provided in the headlamp housing 110. Specifically, the ventilation waterproofing part 1 is mounted in a state where the ventilation waterproofing membrane 10A is inserted into the ventilation member mounting hole 111 so that the ventilation waterproofing membrane 10A becomes the outer side (the outer space 110b side) of the headlamp housing 110. have. At this time, a ring-shaped sealing material 150 that is an elastic member is interposed between the blade base portion 21 of the ventilation path forming member 20 and the head lamp housing 110. In addition, it is assumed that the headlamp housing 110 has a water resistance and airtightness of at least a predetermined value other than the airtight waterproof part mounting hole 111.

When attaching the vent path forming member 20 to the vent waterproof part mounting hole 111 of the headlamp housing 110, a ring-shaped seal member 150 is formed on the leg 23 of the vent path forming member 20. The leg part 23 is inserted into the ventilation waterproofing part mounting hole 111 in the state which changed the shape.

Thereby, the pressing force toward the center axis | shaft is imparted to the tank part 23a of the leg part 23 by the ventilation waterproofing component mounting hole 111, and the leg part 23 is inserted in the retracted state. And when the tank part 23a passes through the ventilation waterproofing component mounting hole 111, the tank part 23a will expand outward as shown to FIG. 4 (b).

In this way, when the ventilation path forming member 20 is mounted to the headlamp housing body 110, the ventilation path forming member 20 is formed on the blade portion 21 by the presence of the seal member 150 having elasticity. The pressing force pushed outward of the sieve 110 is given. For this reason, as shown in (a) and (b) of FIG. 4, the ventilation path forming member 20 is mounted in close contact with the housing body 110, and the ventilation path forming member 20 is a headlamp. It does not come off easily from the housing body 110.

As the ventilation waterproofing part 1 is attached to the headlamp housing 110 as shown in FIG. 4, the airtight waterproofing part 1 is mounted on the headlamp housing 110 so that the interior space 110a and the exterior space 110b of the headlamp housing 110 are fixed. The ventilation can be performed by the ventilation waterproofing part 1 therebetween. That is, the air in the inner space 110a of the headlamp housing 110 passes through the cavity from the lower end side of the ventilation path forming member 20, passes through the ventilation waterproof membrane 10A, and then covers the cover 30. It passes through the spaces 30a and 30b formed by the ventilation waterproof membrane 10A and exits to the external space 110b. Air in one external space 110b enters the internal space 110a of the headlamp housing 110 in a reverse path.

Thus, the ventilation waterproofing part 1 which concerns on Embodiment 1 is a ventilation waterproofing membrane 10A, since it has a structure with the water-repellent nanofiber layer (refer FIG. 2) which consists of a water-repellent nanofiber, and obtains not only waterproof but also high breathability. Can be. In addition, dust-proof effects are also obtained.

That is, the air-permeable waterproof film 10A has an air permeability in the range of 0.2 cm 3 to 1.0 cm 3 / cm 2 / sec in the plastic type method. In addition, the water resistance of the ventilation waterproof membrane 10A is at least about 10000 mmH ₂ O. That is, the air-permeable waterproof membrane 820 (formerly known as the conventional air-permeable waterproof membrane 820) used for the conventional air permeable waterproof component 800 disclosed in Patent Literature 1 is, in the Gurley mold method, as described above. It is in the range of 0.1 to 300 sec / 100 cm 3, and the water pressure is 1.0 KPa or more.

Although the air permeability of the air permeable waterproof membrane 10A according to Embodiment 1 and the air permeability of the conventional air permeable waterproof membrane 820 are different from each other in measuring methods, the air permeability of the air permeable waterproof membrane 10A according to Embodiment 1 is conventionally compared. It is clear that the ventilation of the waterproof membrane 820 is superior to the ventilation.

In addition, the water resistance of the air-permeable waterproof membrane 10A according to the first embodiment and the water pressure of the conventional air-permeable waterproof membrane 820 are different in terms of the water pressure. It is clear that the water pressure resistance of) is superior to the water pressure of the conventional ventilation waterproof membrane 820.

These results show that the air-permeable waterproof membrane 10A according to the first embodiment is an excellent air-permeable waterproof membrane not only in the air permeability but also in water resistance compared with the conventional air permeable waterproof membrane 820.

For this reason, by attaching the ventilation waterproofing part 1 which concerns on Embodiment 1 to the headlamp unit 100, the headlamp housing body 110 is provided between the internal space 110a and the external space 110b. As well as being waterproof, it has high breathability, and it is possible to balance the air pressure (internal pressure) of the internal space 110a of the headlamp housing body 110 with the air pressure (external pressure) of the external space 110b. Thus, since the ventilation waterproof part 1 functions as an internal pressure adjusting part of the automotive electronics, "The inside of the housing of the head lamp unit becomes high temperature and the pressure (inner pressure) of the internal space of the housing rises when the lamp is turned on. Can be prevented.

In addition, although the case where the ventilation waterproofing part 1 was attached to the upper surface of the headlamp housing 110 was illustrated in FIG. 4, the installation position of the ventilation waterproofing component 1 is attached to the upper surface of the headlamp housing 110. FIG. It is not limited, It may be another position as long as it is a position which can adjust the internal pressure adjustment of the headlamp housing 110 suitably. In addition, when the ventilation waterproof membrane 10A is damaged or the degree of contamination of the ventilation waterproof membrane 10A has progressed and it is necessary to replace the ventilation waterproof membrane 10A, the entire ventilation waterproof component 1 may be replaced. . However, when the cover 30 is detachable, it is also possible to remove the cover 30 and replace only the air-permeable waterproof film 10A.

Embodiment 2

The ventilation waterproofing part 2 which concerns on Embodiment 2 is demonstrated. In addition, since the ventilation waterproofing part 2 which concerns on Embodiment 2 differs from the ventilation waterproofing part 1 which concerns on Embodiment 1 only in the structure of the ventilation waterproofing membrane, it is used for the ventilation waterproofing component 2 which concerns on Embodiment 2 here. Only the ventilation waterproof film (referred to as the ventilation waterproof film 10B according to the second embodiment) will be described, and the configuration and description of the ventilation waterproof part 2 according to the second embodiment will be omitted.

FIG. 5 is a diagram for explaining the ventilation waterproof membrane 10B according to the second embodiment. FIG. 5: (a) is a top view of the ventilation waterproof film 10B which concerns on Embodiment 2, and FIG. 5 (b) is sectional drawing of the ventilation waterproof film 10B which concerns on Embodiment 2. FIG. 5, the thickness (in this case, thickness t4) of the ventilation waterproof film 10B is exaggerated with respect to the magnitude | size of the diameter of the ventilation waterproof film 10B similarly to FIG.

As shown in FIG. 5, the air-permeable waterproof film 10B according to the second embodiment has a structure in which the reinforcing material layer 12 is laminated on the water repellent nanofiber layer 11 through the bonding material layer 13. The water repellent nanofiber layer 11 is a polymer which is a raw material of the water repellent nanofiber as described in the air-permeable waterproof membrane 10A according to Embodiment 1, and is made of water repellent polyurethane (PU) or water repellent polyvinylidene fluoride (PVDF). It can use preferably.

In the water repellent nanofiber layer 11 of the air-permeable waterproof membrane 10B, the average diameter of the nanofibers constituting the nanofiber layer 11, the porosity of the water repellent nanofiber layer 11, and the average value of the pore size are shown in Embodiment 1. It is the same as the water-repellent nanofiber layer 11 of the air-permeable waterproof membrane 10A. In addition, the air permeability and the water pressure can also be said to be the same as the air permeability and the water resistance of the air-permeable waterproof membrane 10A according to the first embodiment.

In addition, since the reinforcing material layer 12 is for obtaining the strength as the air-permeable waterproof film 10B, the material for forming the reinforcing material layer 12 is not particularly limited, as long as it does not affect the air permeability of the water repellent nanofibrous layer 11. For example, the nanofibers which consist of polymers, such as a polyethylene terephthalate (PET) and a polypropylene (PP), can be illustrated.

In addition, since the bonding material layer 13 is for bonding the water repellent nanofiber layer 11 and the reinforcing material layer 12, a material for forming the bonding material layer 13 without affecting the breathability of the water repellent nanofiber layer 11. Is not particularly limited, and for example, a thermoplastic polymer which can be melted at a lower temperature than that of the members constituting the water repellent nanofibers 11 and the reinforcing material layer 12 may be used.

In the air-permeable waterproof film 10B according to Embodiment 2, the thickness t4 of the total of the water repellent nanofiber layer 11, the reinforcing material layer 12, and the bonding material layer 13 is within a range of 50 μm to 150 μm. It is preferable to set the thickness (referred to as t1 ') of the water repellent nanofiber layer 11, the thickness t2 of the reinforcing material layer 12, and the thickness t3 of the bonding material layer 13. Moreover, since the ventilation waterproof film 10B which concerns on Embodiment 2 has a structure which has the reinforcing material layer 12, the strength as the ventilation waterproof film 10B becomes high. For this reason, the thickness t1 'of the water repellent nanofibrous layer 11 is made thinner than the thickness t1 of the air permeable waterproof film 10A according to the first embodiment. Specifically, the thickness t1 'of the water repellent nanofibrous layer may be in the range of 1 µm to 30 µm.

Thus, since the ventilation waterproof film 10B which concerns on Embodiment 2 has the structure which laminated | stacked the reinforcing material 12 on the water repellent nanofiber layer 11, the strength and breathability of the ventilation waterproof film 10B can be ensured appropriately, In addition, the durability of the ventilation waterproof membrane 10B can be improved, and the handling of the ventilation waterproof membrane 10B can be made easier.

Next, the process for manufacturing the ventilation waterproof membrane 10B which concerns on Embodiment 2 is demonstrated.

FIG. 6 is a flowchart for explaining an example of a process for producing the air-permeable waterproof film 10B according to the second embodiment. First, a long sheet-shaped reinforcing material is set to a reinforcing material unwinding roller (not shown) of a conveying mechanism (not shown), and a long sheet-shaped thermoplastic bonding material is also attached to a bonding material unwinding roller of said conveying mechanism (not shown). The reinforcing material and the bonding material are conveyed at a predetermined conveying speed (reinforcing material and the bonding material conveying step (S11)).

And the laminated body of the reinforcing material layer 12 by a reinforcing material, and the bonding material layer 13 by a bonding material is laminated | stacked by the lamination | stacking material loosened and conveyed from a reinforcement material releasing roller, and the bonding material unwound and conveyed from a bonding material releasing roller. A first laminate) is formed. Subsequently, the water-repellent nanofiber layer 11 made of a water-repellent nanofiber is formed by electrospinning the water-repellent polymer on the bonding material layer 13 side of the first laminate (water-repellent nanofiber layer forming step (S12)).

Specifically, in the water repellent nanofiber layer forming step (S12), first, a polymer solution constituting the water repellent nanofibers is supplied to a nozzle unit through a polymer solution supply unit of a field spinning device (not shown) for forming a water repellent nanofiber layer, and The polymer solution is discharged from each nozzle of the nozzle unit to form the water repellent nanofiber layer 11 on the surface of the bonding material layer 13 of the first laminate. As a result, a long sheet-like laminate (referred to as a second laminate) in which the reinforcing material layer 12, the bonding material layer 13, and the water repellent nanofiber layer 11 is laminated is formed.

Subsequently, the reinforcing material layer 12 and the water repellent nanofiber layer 11 are joined by the bonding material layer 13 by pressing the second laminate in a state where heat is applied by a bonding device (not shown). (Joining process (S13)).

Thereby, the laminated body (referred to as a 3rd laminated body) of the elongate sheet | seat in which the reinforcement layer 12 and the water repellent nanofiber layer 11 were joined by the bonding material layer 13 is formed, and the 3rd laminated | stacked manufactured as mentioned above A process of punching a sieve into a disk shape having a predetermined diameter and processing is performed (punching step S14).

By sequentially performing such a process, the ventilation waterproof membrane 10B shown in FIG. 5 can be manufactured in large quantities. Since the ventilation waterproof membrane 10B thus manufactured has a structure in which the reinforcing layer 12 is laminated on the water repellent nanofiber layer 11 (see FIG. 5), the ventilation waterproof membrane 10B becomes a highly breathable waterproof membrane. .

In the case where the ventilation waterproofing component according to the second embodiment having the ventilation waterproofing membrane 10B having such a structure is used, for example, as the ventilation waterproofing component of the automotive electronics, as shown in FIG. The same effects as in the case of using the ventilation waterproofing component 1 as the ventilation waterproofing component of an automotive electronic device can be obtained. In addition, the ventilation waterproofing part according to Embodiment 2 has a structure in which the ventilation waterproofing membrane 10B is laminated with the reinforcing material layer 12 on the water repellent nanofibrous layer 11, so that the strength of the ventilation waterproofing membrane 10B itself is high. This makes it possible to obtain an effect of making the durability of the ventilation waterproof part more excellent.

In addition, this invention is not limited to embodiment mentioned above, A various deformation | transformation is possible in the range which does not deviate from the summary of this invention. For example, the modification implementation shown below is also possible.

(1) The shape and structure of the ventilation waterproof film (ventilation waterproof film 10A or ventilation waterproof film 10B), ventilation path forming member 20, cover 30 and the like of the above embodiments are described in the above embodiments. The present invention is not limited to the shape and structure described above, and various modifications may be made.

For example, although the ventilation path | route formation member 20 made the cylinder shape (cylindrical shape) a cross section in each said embodiment, the cross section does not necessarily need to be a circle | round | yen, For example, the cross section is a cylinder, such as an oval and a cut-off. It may be a shaped body.

 In addition, although the cover 30 was a shape which covers a part of the upper end part and the outer side surface of the ventilation path formation member 20 in each said embodiment, it is not limited to this, The ventilation waterproof film 10A (or the ventilation waterproof film 10B) It is good to be able to secure the ventilation path after protecting)). In addition, the structure at the time of attaching the ventilation waterproof part 1 or the ventilation waterproof part 2 to the housing body (headlamp housing body 110) of the automotive electrical equipment (headlamp unit) is also limited to the structure demonstrated in each said embodiment. Instead, various methods can be employed.

(2) In each of the embodiments described above, the headlamp unit is exemplified as the automotive electronics, but is not limited to the headlamp unit. The breathable waterproof component of the present invention can be widely used for automotive electronics that require breathability in a state of securing waterproofness. Also in this case, it is possible to reliably prevent the problem in the above automotive electronics that "the interior of the automotive electrical component housing becomes high temperature and the internal pressure of the housing increases due to the operation of the automotive electrical equipment."

(3) In the second embodiment, the air-permeable waterproof film 10B is manufactured by the process shown in FIG. 6, but is not limited thereto. For example, a water-repellent nanofiber layer 11 may be formed of a commercially available adhesive. The reinforcing material layer 12 may be joined.

Claims (12)

1. In the ventilation waterproofing part which can be attached to the housing body which has an opening for ventilation,

   A tubular vent path forming member for forming a vent path between an inner space and an outer space of the housing body, and

   A ventilation waterproof membrane provided on the ventilation path forming member to close the ventilation path,

   The breathable waterproof membrane is a waterproof waterproof component, characterized in that it has a nanofiber layer made of water-repellent nanofibers.
2. The method of claim 1,

   The breathable waterproof membrane is a waterproof breathable component, characterized in that consisting of only a water-repellent nanofiber layer made of a water-repellent nanofiber.
3. The method of claim 2,

   The ventilation waterproof membrane is a waterproof waterproof component, characterized in that the thickness of the water-repellent nanofiber layer is in the range of 5㎛ ~ 50㎛.
4. The method of claim 1,

   The breathable waterproof membrane has a water-repellent nanofiber layer made of a water-repellent nanofiber, and a breathable waterproof component, characterized in that it has a reinforcing layer laminated on the nanofiber layer.
5. The method of claim 4, wherein

   The total thickness of the water-repellent nanofiber layer and the reinforcing material layer made of the water-repellent nanofibers is in the range of 50 µm to 150 µm, and the thickness of the total water-repellent nanofiber layer is in the range of 1 µm to 30 µm. Breathable waterproof parts characterized by the above.
6. The method according to any one of claims 1 to 5,

   The water-repellent nanofiber is a waterproof waterproof component, characterized in that the average diameter is in the range of 50nm ~ 500nm.
7. The method according to any one of claims 1 to 6,

   The porosity of the water-repellent nanofibrous layer is 65% to 85%, the average value of the pore size is 0.1㎛ ~ 3㎛, air permeability is characterized in that the air permeability is 0.2 cm 3 ~ 1.0 cm 3 / cm 2 / sec in the plastic method part.
8. The method according to any one of claims 1 to 7,

   The water-repellent nanofiber is a waterproof waterproof component, characterized in that made of water-repellent polyurethane (PU) or water-repellent polyvinylidene fluoride (PVDF).
9. The method according to any one of claims 1 to 8,

   And a cover mounted to the ventilation path forming member to protect the ventilation waterproof membrane and to secure the ventilation path.
10. The method according to any one of claims 1 to 9,

    The ventilation waterproof part is a ventilation waterproof part, characterized in that it is used as a pressure resistant part of the automotive electronics.
11. In the ventilation waterproofing part having a ventilation path member having a cylindrical shape that forms a ventilation path between an inner space and an outer space of the housing body having an opening for ventilation, the ventilation waterproof membrane provided to close the ventilation path,

    A breathable waterproof membrane, characterized by having a nanofiber layer made of water repellent nanofibers.
12. In the automotive electronics, in which a ventilation waterproof component is mounted on a housing having an opening for ventilation,

    The ventilation waterproof component is an automotive electrical component according to any one of claims 1 to 10.

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