WO2011158409A1 - 防水通気フィルタおよびその使用 - Google Patents
防水通気フィルタおよびその使用 Download PDFInfo
- Publication number
- WO2011158409A1 WO2011158409A1 PCT/JP2011/001700 JP2011001700W WO2011158409A1 WO 2011158409 A1 WO2011158409 A1 WO 2011158409A1 JP 2011001700 W JP2011001700 W JP 2011001700W WO 2011158409 A1 WO2011158409 A1 WO 2011158409A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- resin film
- waterproof
- ventilation filter
- filter according
- waterproof ventilation
- Prior art date
Links
- 239000011347 resin Substances 0.000 claims abstract description 89
- 229920005989 resin Polymers 0.000 claims abstract description 89
- 238000009423 ventilation Methods 0.000 claims description 47
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 26
- 239000000243 solution Substances 0.000 claims description 15
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 11
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 239000007800 oxidant agent Substances 0.000 claims description 6
- 239000002033 PVDF binder Substances 0.000 claims description 5
- -1 polyethylene terephthalate Polymers 0.000 claims description 5
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 5
- 239000004642 Polyimide Substances 0.000 claims description 4
- 239000012670 alkaline solution Substances 0.000 claims description 4
- 229920001721 polyimide Polymers 0.000 claims description 4
- 229920000515 polycarbonate Polymers 0.000 claims description 3
- 239000004417 polycarbonate Substances 0.000 claims description 3
- 239000011112 polyethylene naphthalate Substances 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 2
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 claims description 2
- 239000005871 repellent Substances 0.000 abstract description 4
- 230000002209 hydrophobic effect Effects 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 31
- 239000000853 adhesive Substances 0.000 description 23
- 230000001070 adhesive effect Effects 0.000 description 23
- 239000000463 material Substances 0.000 description 20
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 20
- 239000004810 polytetrafluoroethylene Substances 0.000 description 20
- 239000012528 membrane Substances 0.000 description 16
- 238000005530 etching Methods 0.000 description 12
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- 239000002585 base Substances 0.000 description 7
- 238000010884 ion-beam technique Methods 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 239000003921 oil Substances 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 6
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 4
- 230000035699 permeability Effects 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 238000007654 immersion Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000004745 nonwoven fabric Substances 0.000 description 3
- 230000002940 repellent Effects 0.000 description 3
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000012286 potassium permanganate Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000005708 Sodium hypochlorite Substances 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 description 1
- 229940077239 chlorous acid Drugs 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- QWPPOHNGKGFGJK-UHFFFAOYSA-N hypochlorous acid Chemical compound ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 125000005010 perfluoroalkyl group Chemical group 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000009823 thermal lamination Methods 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Images
Classifications
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- B01D67/0081—After-treatment of organic or inorganic membranes
- B01D67/0088—Physical treatment with compounds, e.g. swelling, coating or impregnation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
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- B01D39/14—Other self-supporting filtering material ; Other filtering material
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- B01D39/1692—Other shaped material, e.g. perforated or porous sheets
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- B01D46/54—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
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- B01D46/54—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
- B01D46/543—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms using membranes
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- B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
- B01D46/62—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
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- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/32—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed at least two layers being foamed and next to each other
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0213—Venting apertures; Constructional details thereof
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0213—Venting apertures; Constructional details thereof
- H05K5/0215—Venting apertures; Constructional details thereof with semi-permeable membranes attached to casings
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
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- B32B2305/02—Cellular or porous
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
Definitions
- the present invention relates to, for example, a waterproof ventilation filter mounted on a housing and use of the waterproof ventilation filter.
- an automobile ECU Electronic Control Unit
- an automobile electrical component such as a motor, a lamp, and a sensor
- an electric toothbrush such as a shaver
- a home appliance such as a mobile phone, a solar cell, etc.
- An opening is provided in the body for the purpose of eliminating the pressure difference between the inside and outside of the housing, and the opening is closed with a waterproof ventilation filter.
- This waterproof ventilation filter prevents intrusion of foreign matters such as water and dust into the casing while ensuring ventilation inside and outside the casing.
- a polytetrafluoroethylene (PTFE) porous film having good air permeability and high water pressure resistance is often used (for example, see Patent Document 1).
- the PTFE porous membrane is usually obtained by forming PTFE fine powder into a sheet shape and stretching the sheet-like formed body in two directions orthogonal to each other.
- the waterproof breathable filter is sometimes attached to the housing by, for example, heat welding or ultrasonic welding or using an adhesive.
- the waterproof ventilation filter is waterproof. It is preferable to provide an annular double-sided tape along the peripheral edge of the ventilation filter.
- a waterproof breathable filter using a PTFE porous membrane when the stretching ratio at the time of producing the PTFE porous membrane is increased, the fiber diameter of the PTFE porous membrane is reduced, and the adhesive area between the PTFE porous membrane and the double-sided tape is reduced.
- the adhesive strength may be weakened due to the decrease in the resistance.
- the adhesive force between the PTFE porous membrane and the double-sided tape is greatly reduced, and water may enter the inside of the housing from the interface between them. .
- an object of the present invention is to provide a waterproof ventilation filter that firmly holds a double-sided tape and use of the waterproof ventilation filter.
- the present invention is a waterproof ventilation filter for preventing water from entering while ensuring ventilation, and is a non-porous resin film that penetrates the resin film in the thickness direction.
- the plurality of through-holes on at least one of the resin film in which a plurality of through-holes having a predetermined size of 0.01 ⁇ m or more and 10 ⁇ m or less are formed and both surfaces in the thickness direction of the resin film And a treatment layer having hydrophobicity and oil repellency formed so as to have an opening at a corresponding position, and the treatment layer is sandwiched between the peripheral portions of one surface in the thickness direction of the resin film.
- a waterproof breathable filter comprising an annular double-sided tape attached thereto.
- the “size” with respect to the through hole is the diameter of a circle equal to the cross-sectional area of the through hole.
- the present invention uses a waterproof ventilation filter that closes an opening provided in the casing using the waterproof ventilation filter and eliminates a pressure difference between the inside and the outside of the casing via the waterproof ventilation filter. I will provide a.
- waterproofness can be ensured by the treatment layer on the resin film while allowing ventilation through the through-hole formed in the resin film.
- a non-porous resin film it is possible to ensure a large adhesion area between the treatment layer formed on the resin film and the double-sided tape. Therefore, according to this invention, a double-sided tape and a process layer can be adhere
- FIG. 1 shows a waterproof ventilation filter 1 according to an embodiment of the present invention.
- This waterproof ventilation filter 1 is for preventing water from entering while ensuring ventilation.
- the waterproof ventilation filter 1 is attached to the casing so as to close an opening provided in the casing (not shown), and the pressure difference between the inside and the outside of the casing is eliminated via the waterproof ventilation filter 1. Used for.
- the waterproof breathable filter 1 includes a non-porous resin film 2, a treatment layer 3 formed on the resin film 2, and an annular double-sided tape 4 along the peripheral edge of the resin film 2.
- non-porous means a solid that is clogged with resin.
- the shape of the resin film 2 is not particularly limited.
- the resin film 2 may be circular or polygonal in plan view (when viewed from the thickness direction).
- the resin film 2 is formed with a plurality of through holes 21 penetrating the resin film 2 in the thickness direction.
- the through holes 21 are open on both surfaces in the thickness direction of the resin film 2.
- the through hole 21 is typically a straight hole that penetrates the resin film 2 linearly with a constant cross-sectional shape.
- Such a through hole can be formed by, for example, ion beam irradiation and etching. Further, in the ion beam irradiation and etching, a through hole having a uniform size and axial direction can be formed in the resin film 2.
- the cross-sectional shape of the through hole 21 is not particularly limited, and may be circular or indefinite.
- the axial direction of the through-hole 21 does not need to be a direction perpendicular
- the through hole 21 has a predetermined size of 0.01 ⁇ m or more and 10 ⁇ m or less. Note that the size of the through holes 21 does not have to be completely the same in all the through holes 21, and can be regarded as substantially the same value in all the through holes 21 (for example, the standard deviation is 10% of the average value). Or less).
- the size of the through-hole 21 can be adjusted by the etching time and the etching processing solution concentration. A preferable size of the through hole 21 is 0.5 ⁇ m or more and 5 ⁇ m or less.
- the through-hole 21 fits in a specific band (for example, the maximum density is 1.5 times or less of the minimum density) in the range of density of 10 to 1 ⁇ 10 8 pieces / mm 2 over the entire surface of the resin film 2. It is preferable that they are uniformly distributed.
- the density of the through holes 21 can be adjusted by the number of ion irradiations during ion beam irradiation.
- the density of the through holes 21 is more preferably 1 ⁇ 10 3 to 1 ⁇ 10 7 holes / mm 2 .
- the porosity of the resin film 2 (the ratio of the sum of the cross-sectional areas of all the through holes 21 to the area defined by the contour of the resin film 2) is not particularly limited, but from the viewpoint of maintaining film strength that can withstand the intended use, It is preferably 50% or less, and more preferably 35% or less.
- the thickness of the resin film 2 is not particularly limited, but in order to realize a structure with a small pore diameter (high water pressure resistance) and a high porosity (high air permeability) (to form a small-diameter hole even with a thick substrate).
- the ratio of the thickness of the resin film 2 to the predetermined size (T / D where D is the predetermined size and T is the thickness of the resin film) is preferably 1 or more and 10,000 or less. The following is more preferable.
- the material which comprises the resin film 2 is not specifically limited, Resin which decomposes
- the resin film 2 is made of at least one resin selected from polyethylene terephthalate (PET), polycarbonate (PC), polyimide (PI), polyethylene naphthalate (PEN), and polyvinylidene fluoride (PVdF).
- an etching treatment liquid such as an alkali solution or an oxidant solution corresponding to the material constituting the resin film 2 is used.
- an alkaline solution such as potassium hydroxide or sodium hydroxide can be used as a solution for hydrolyzing the resin.
- an oxidant solution such as a chlorous acid aqueous solution, a hypochlorous acid aqueous solution, a hydrogen peroxide solution, and a potassium permanganate solution can be used as a solution for oxidatively decomposing the resin.
- the resin film 2 when the resin film 2 is composed of any of PET, PEN, and PC, a solution containing sodium hydroxide as a main component is used as the etching treatment liquid, and when the resin film 2 is composed of PI, the etching treatment liquid A solution containing sodium hypochlorite as a main component is used.
- the resin film 2 is composed of PVdF
- PVdF is decomposed using a solution obtained by adding potassium permanganate to a solution mainly composed of sodium hydroxide as an etching treatment solution.
- a membrane filter sold by Oxyphen or Millipore can be used as the resin film 2 in which the through hole 21 is formed.
- the resin film 2 does not necessarily need to be a single layer, and may be divided into a plurality of layers.
- the treatment layer 3 is formed on one surface of both surfaces in the thickness direction of the resin film 2 in FIG. 1, but may be formed on both surfaces of the resin film 2. That is, the treatment layer 3 only needs to be formed on at least one of the two surfaces in the thickness direction of the resin film 2.
- the treatment layer 3 is formed so as to have an opening 31 at a position corresponding to the through hole 21 and has hydrophobicity and oil repellency.
- a treatment layer 3 can be formed by thinly applying a hydrophobic oil repellent on the resin film 2 and drying it.
- oil repellent include a fluorine-based coating agent having a perfluoroalkyl group.
- the thickness of the processing layer 3 is less than half of the predetermined size regarding the through-hole 21 mentioned above.
- the inner peripheral surface of the through holes 21 can also be covered with a second treatment layer continuous with the treatment layer 3. Is possible.
- the size of the opening 31 of the processing layer 3 is smaller than the size of the through hole 21 by the amount of the second processing layer.
- the double-sided tape 4 is stuck to the periphery of the surface covered with the treatment layer 3 of the resin film 2 with the treatment layer 3 interposed therebetween.
- the double-sided tape 4 may be attached to either surface of the resin film 2. That is, the double-sided tape 4 is stuck to the peripheral portion of one of the two surfaces in the thickness direction of the resin film 2 with the treatment layer 3 interposed therebetween.
- the double-sided tape 4 is one in which an adhesive is applied to both sides of a base material.
- a base material and an adhesive are not specifically limited.
- a nonwoven fabric made of PET can be used as the base material, and an acrylic pressure-sensitive adhesive or a silicon pressure-sensitive adhesive can be used as the pressure-sensitive adhesive.
- a breathable support material 5 may be laminated on the surface of the resin film 2 opposite to the surface on which the double-sided tape 3 is adhered.
- the air-permeable support material 5 may be directly laminated on the resin film 2 as shown in FIG.
- the breathable support material 5 may be laminated on the resin film 2 with the treatment layer 3 interposed therebetween.
- the breathable support material 5 is preferably one that is more breathable than the resin film 2, and for example, a woven fabric, a nonwoven fabric, a net, a mesh, or the like can be used.
- polyester, polyethylene, an aramid resin etc. are mentioned, for example.
- the resin film 2 and the breathable support material 5 are joined by a normal method such as heat welding or adhesion with an adhesive.
- the resin film 2 and the breathable support material 5 are partially joined, and the area of the joined portion is preferably 5 to 20% of the total area. This is because the resin film 2 and the air-permeable support material 5 are easily peeled off when the area of the joint portion is less than 5% of the total area, and the water pressure resistance is lowered at the joint portion when the area exceeds 20%.
- JIS L1072-A low water pressure method
- JIS L1072-B high water pressure method
- the Gurley number obtained by converting the measured value in the same manner as in JIS P8117 to an area of 642 mm 2 is 0.5 seconds / 100 mL or more and 500 seconds / 100 mL or less is preferable.
- waterproofness can be ensured by the treatment layer 3 on the resin film 2 while allowing ventilation through the through-holes 21 formed in the resin film 2.
- the non-porous resin film 2 it is possible to ensure a large adhesion area between the treatment layer 3 formed on the resin film 2 and the double-sided tape 4. Therefore, in the waterproof ventilation filter 1 of this embodiment, the double-sided tape 4 and the process layer 3 can be adhere
- a plurality of porous PTFE membranes may be laminated in order to increase the thickness.
- water may leak from the interface between the PTFE porous membranes at a pressure lower than the water pressure resistance of the PTFE porous membrane alone during the pressure test.
- the waterproof breathable film 1 of the present embodiment it is only necessary to use the thick resin film 2 in order to increase the thickness, so that there is no problem during the water pressure resistance test.
- heavy ions may be irradiated with high acceleration and high density at the time of ion beam irradiation.
- the waterproof ventilation filter using the PTFE porous membrane has low tensile strength.
- the waterproof ventilation filter 1 of this embodiment is unstretched, its tensile strength is high. That is, according to the waterproof breathable filter 1 of the present embodiment, improvement in workability and resistance to external force can be expected.
- the resin film 2 made of the same material as the breathable support material 5 can be used when the breathable support material 5 is used in the configuration of the present embodiment, for example, the compatibility at the time of thermal lamination is improved.
- the adhesive strength between the breathable support material 5 and the resin film 2 can be improved.
- Example 1 As a resin film, a sample A (Oxydisk manufactured by Oxyphen) having a thickness of 23 ⁇ m in which a through-hole having a diameter of 0.4 ⁇ m was formed on a non-porous base sheet made of PET by ion beam irradiation and etching was used.
- a sample A (Oxydisk manufactured by Oxyphen) having a thickness of 23 ⁇ m in which a through-hole having a diameter of 0.4 ⁇ m was formed on a non-porous base sheet made of PET by ion beam irradiation and etching was used.
- a fluorine-based treating agent (X-70-029C manufactured by Shin-Etsu Chemical Co., Ltd.) is applied to the other side of the resin film. It was applied and dried to form a treatment layer having hydrophobicity and oil repellency.
- the laminate thus produced was punched into a circle having a diameter of 10 mm, and an acrylic pressure-sensitive adhesive was applied to both sides of the base material made of PET on the peripheral portion of the surface on the treatment layer side of the punched laminate.
- a waterproof double-sided tape having an inner diameter of 5.5 mm and an outer diameter of 10 mm was attached to obtain a waterproof air-permeable filter.
- Example 2 Example except that sample resin (Oxydisk manufactured by Oxyphen) having a thickness of 22 ⁇ m in which a through hole having a diameter of 0.8 ⁇ m was formed by ion beam irradiation and etching on a non-porous base sheet made of PET was used as the resin film In the same manner as in Example 1, a waterproof ventilation filter was obtained.
- Example 3 Example except that sample resin (Oxydisk manufactured by Oxyphen Co., Ltd.) having a thickness of 22 ⁇ m in which a through hole having a diameter of 1.0 ⁇ m was formed on a non-porous base sheet made of PET by ion beam irradiation and etching was used as a resin film In the same manner as in Example 1, a waterproof ventilation filter was obtained.
- sample resin Olydisk manufactured by Oxyphen Co., Ltd.
- Example 1 An adhesive sheet having no air permeability was obtained in the same manner as in Example 1 except that a non-porous film made of PET and having a thickness of 25 ⁇ m was used as the resin film.
- Example 2 A waterproof breathable filter was obtained in the same manner as in Example 1 except that a PTFE porous membrane having a thickness of 15 ⁇ m and an average pore diameter of 0.8 ⁇ m was used instead of the resin film.
- the PTFE porous membrane is formed by first extruding a mixture of PTFE fine powder and a liquid lubricant into a sheet shape, then rolling and drying the sheet-like molded body, and then longitudinally at 280 ° C. below the melting point of PTFE. The film was stretched 4.5 times in the direction and 15 times in the transverse direction.
- the waterproof air permeable filter or adhesive sheet is attached to the housing after the waterproof air permeable filter or adhesive sheet is placed on the housing, and then a 2 kg mass roll is placed on the waterproof air permeable filter or adhesive sheet at a speed of 5 mm / second. I went back and forth once.
- the waterproof ventilation filter or adhesive sheet affixed to the housing was aged for 30 minutes in an environment of a temperature of 25 ° C. and a relative humidity of 65%. Thereafter, using a push-pull gauge (9502 manufactured by Aiko Engineering Co., Ltd.) having a terminal with a diameter of 1.1 mm, the waterproof ventilation filter or adhesive sheet is pushed up from the outside of the casing through the opening of the casing with the terminal of the push-pull gauge. The pushing force when the filter or the adhesive sheet began to peel was measured as the bonding force. Also, when the waterproof breathable filter or adhesive sheet began to peel off, it was confirmed where the breakage occurred.
- Comparative Examples 1 and 2 breakage occurred at the interface between the double-sided tape and the treatment layer. This has shown that the adhesive force of a double-sided tape and a process layer is weak. On the other hand, in Examples 1 to 3, the double-sided tape is broken inside, and it can be seen that the adhesive force between the double-sided tape and the treatment layer is high. In Comparative Example 2 using the PTFE porous membrane, the bonding force after immersion in hot water is reduced by about 45%, but in Examples 1 to 3 using a resin film, the bonding force after immersion in hot water is decreased. Was less than 16%, and the bonding strength was 5 N or more even after immersion in warm water.
- the above-mentioned housing to which the waterproof ventilation filter was joined was set in a Gurley tester specified in JIS P8117, and the time required for 100 mL of air to pass through the waterproof ventilation filter was measured. Thereafter, the Gurley number was calculated by converting this measured value into an area of 642 mm 2 .
- Examples 1 to 3 using a resin film have high water pressure resistance and high air permeability.
- the waterproof breathable filter of the present invention can be used for outdoor lamps such as outdoor lights and lamps for trains, for example, in addition to automobile electrical components, home appliances, and solar cells.
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Abstract
Description
樹脂フィルムとして、PETからなる無孔のベースシートに、イオンビーム照射およびエッチングにより直径0.4μmの貫通孔を形成した厚さ23μmのサンプルA(オキシフェン社製Oxydisk)を用いた。
樹脂フィルムとして、PETからなる無孔のベースシートに、イオンビーム照射およびエッチングにより直径0.8μmの貫通孔を形成した厚さ22μmのサンプルB(オキシフェン社製Oxydisk)を用いた以外は実施例1と同様にして防水通気フィルタを得た。
樹脂フィルムとして、PETからなる無孔のベースシートに、イオンビーム照射およびエッチングにより直径1.0μmの貫通孔を形成した厚さ22μmのサンプルC(オキシフェン社製Oxydisk)を用いた以外は実施例1と同様にして防水通気フィルタを得た。
樹脂フィルムとして、PETからなる、厚さ25μmの無孔フィルムを用いた以外は実施例1と同様にして、通気性を有しない接着シートを得た。
樹脂フィルムの代わりに、厚さ15μm、平均孔径0.8μmのPTFE多孔質膜を用いた以外は実施例1と同様にして防水通気フィルタを得た。PTFE多孔質膜は、まずPTFE微粉末に液状潤滑剤を混合したものを押し出してシート状に成形し、ついでシート状成形体を圧延するとともに乾燥させた後に、PTFEの融点以下の280℃で縦方向に4.5倍、横方向に15倍に延伸して作製した。
実施例および比較例の防水通気フィルタまたは接着シートに対して、金属板からなる筐体に貼り付けたときの接合力を測定する接合力測定試験を行った。まず、図3に示すように、防水通気フィルタまたは接着シートを、これらの構成要素である両面テープにより、直径3mmの開口が設けられた筐体に筐体の内側から開口を塞ぐように、換言すれば筐体の開口を通じて処理層が筐体の外部に面するように貼り付けた。防水通気フィルタまたは接着シートの筐体への貼り付けは、筐体の上に防水通気フィルタまたは接着シートを乗せた後に、防水通気フィルタまたは接着シートの上から質量2kgのロールを5mm/秒の速度で一往復させて行った。
次に、実施例および比較例の防水通気フィルタに対して、耐水圧試験およびガーレー試験を行った。まず、接合力試験のときと同様に、防水通気フィルタを筐体に接合した。ついで、JIS L1072-B(高水圧法)と同様にして、筐体の外側から100kPa/分で水圧をかけ、防水通気フィルタから水が漏れ出したときの圧力を耐水圧として測定した。
Claims (11)
- 通気を確保しつつ水の浸入を防止するための防水通気フィルタであって、
非多孔質の樹脂フィルムであって該樹脂フィルムを厚さ方向に貫通する、0.01μm以上10μm以下の所定のサイズを有する複数の貫通孔が形成された樹脂フィルムと、
前記樹脂フィルムの厚さ方向の両面のうちの少なくとも一方の面上に、前記複数の貫通孔と対応する位置に開口を有するように形成された、疎水性および撥油性を有する処理層と、
前記樹脂フィルムの厚さ方向の両面のうちの一方の面の周縁部に前記処理層を挟んで貼着された環状の両面テープと、
を備える、防水通気フィルタ。 - 前記複数の貫通孔は、密度が10~1×108個/mm2の範囲のうちの特定の帯域に収まるように一様に分布している、請求項1に記載の防水通気フィルタ。
- 前記樹脂フィルムの気孔率が50%以下である、請求項1に記載の防水通気フィルタ。
- 前記所定のサイズに対する前記樹脂フィルムの厚さの比が1以上10000以下である、請求項1に記載の防水通気フィルタ。
- 前記樹脂フィルムは、アルカリ溶液、酸化剤溶液、または酸化剤を含むアルカリ溶液により分解する樹脂からなる、請求項1に記載の防水通気フィルタ。
- 前記樹脂は、ポリエチレンテレフタレート、ポリカーボネート、ポリイミド、ポリエチレンナフタレートおよびポリフッ化ビニリデンから選ばれる少なくとも1種である、請求項5に記載の防水通気フィルタ。
- 前記樹脂フィルムにおける前記両面テープが貼着された面と反対側の面に積層された通気性支持材をさらに備える、請求項1に記載の防水通気フィルタ。
- 金属板からなる筐体に貼り付けたときの接合力が5N以上である、請求項1に記載の防水通気フィルタ。
- 開口を有する金属板に前記開口を塞ぐように貼り付けた後に、JIS L1072-A(低水圧法)またはJIS L1072-B(高水圧法)と同様にして測定したときの耐水圧が1kPa以上1000kPa以下である、請求項1に記載の防水通気フィルタ。
- 開口を有する金属板に前記開口を塞ぐように貼り付けた後に、JIS P8117と同様にして測定したときの測定値を642mm2の面積に換算して得たガーレー数が0.5秒/100mL以上500秒/100mL以下である、請求項1に記載の防水通気フィルタ。
- 請求項1に記載された防水通気フィルタを用いて筐体に設けられた開口を塞ぎ、前記防水通気フィルタを介して前記筐体の内部と外部の圧力差を解消する、防水通気フィルタの使用。
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US13/703,543 US9044706B2 (en) | 2010-06-16 | 2011-03-23 | Water-proof air-permeable filter and use of the same |
KR1020177030336A KR102074048B1 (ko) | 2010-06-16 | 2011-03-23 | 방수 통기 필터 및 그의 용도 |
KR1020137001032A KR101967934B1 (ko) | 2010-06-16 | 2011-03-23 | 방수 통기 필터 및 그의 용도 |
CN201180029930.4A CN102946969B (zh) | 2010-06-16 | 2011-03-23 | 防水透气过滤器及其用途 |
EP11795317.4A EP2583734B1 (en) | 2010-06-16 | 2011-03-23 | Waterproof air-permeable filter and uses thereof |
US14/699,815 US9855530B2 (en) | 2010-06-16 | 2015-04-29 | Water-proof air-permeable filter and use of the same |
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US14/699,815 Continuation US9855530B2 (en) | 2010-06-16 | 2015-04-29 | Water-proof air-permeable filter and use of the same |
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EP2583734B1 (en) | 2020-12-23 |
US9855530B2 (en) | 2018-01-02 |
EP2583734A4 (en) | 2017-03-08 |
EP2583734A1 (en) | 2013-04-24 |
CN102946969B (zh) | 2015-03-04 |
JP2015178105A (ja) | 2015-10-08 |
CN102946969A (zh) | 2013-02-27 |
KR20170121316A (ko) | 2017-11-01 |
KR101967934B1 (ko) | 2019-04-10 |
KR20130098278A (ko) | 2013-09-04 |
KR102074048B1 (ko) | 2020-02-05 |
US9044706B2 (en) | 2015-06-02 |
JP5898803B2 (ja) | 2016-04-06 |
JP2012020280A (ja) | 2012-02-02 |
KR102123195B1 (ko) | 2020-06-15 |
KR20190042750A (ko) | 2019-04-24 |
US20150246319A1 (en) | 2015-09-03 |
JP5739699B2 (ja) | 2015-06-24 |
US20130087042A1 (en) | 2013-04-11 |
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