WO2010032627A1

WO2010032627A1 - Waterproof, sound-conducting hood

Info

Publication number: WO2010032627A1
Application number: PCT/JP2009/065421
Authority: WO
Inventors: 一郎駒田; 早苗万波; 雅司小野
Original assignee: ジャパンゴアテックス株式会社
Priority date: 2008-09-17
Filing date: 2009-09-03
Publication date: 2010-03-25
Also published as: CA2737687A1; AU2009293885B2; EP2335505A4; CA2737687C; EP2335505A1; CN102186368A; JP2010070874A; AU2009293885A1; JP5286006B2; EP2335505B1; KR20110074869A; US20110209265A1

Abstract

Disclosed is a waterproof, sound-conducting hood with superior water resistance and sound‑conducting properties. The waterproof, sound-conducting hood is a waterproof hood constructed from waterproof material, and is characterized by the aforementioned waterproof material being equipped with a waterproof sound-conducting means on at least one of the areas facing the ears of the wearer, and by the aforementioned waterproof, sound-conducting means having a waterproof, sound-conducting membrane with acoustic transmission loss of 5 db or less.

Description

Waterproof sound hood

The present invention relates to a waterproof sound-permeable hood that is excellent in waterproofness and sound permeability.

Conventionally, rain garments such as raincoats and rain jackets used for daily use and work are provided with a waterproof hood to prevent the wearer's head from getting wet by raindrops. Such a waterproof hood is formed of a waterproof material such as a waterproof fabric or a waterproof sheet. However, if a hole or tear occurs in the waterproof material due to rubbing during wearing or load during washing, the waterproof hood is waterproof. It will be lost. Therefore, from the viewpoint of improving durability against rubbing when worn, as a waterproof material constituting the waterproof hood, a fabric made of waterproof fabric such as relatively thick polyamide and polyester is often used.

By the way, since the waterproof hood is usually configured to cover the wearer's head (the top of the head, the temporal region, and the back of the head), when the waterproof hood is worn, both ears of the wearer are also waterproof. It will be covered by. Further, as described above, the waterproof hood is often composed of a relatively thick waterproof material, but the waterproof hood composed of such a relatively thick waterproof material has very poor sound transmission. For this reason, wearing a waterproof hood makes it difficult to hear surrounding sounds. For example, it makes it difficult to talk while wearing it, and there are problems such as missing a warning sound from a device or the like at the work site.

Therefore, various types of waterproof hoods have been proposed in which an opening is provided in a portion corresponding to the wearer's ear in order to improve sound-transmitting properties when worn (for example, Patent Documents 1 and 2). However, the waterproof hood described in

Patent Documents

1 and 2 has a problem that raindrops enter from the opening.

Utility Model Registration No. 3054521 JP 2002-275723 A

This invention was made in view of the said subject, Comprising: It aims at providing the waterproof sound-permeable hood excellent in waterproofness and sound-permeable property.

The waterproof sound-permeable hood of the present invention that has solved the above-described problems is a waterproof sound-permeable hood made of a waterproof material, and is waterproof to at least one portion of the waterproof material facing the wearer's ear. Soundproof means, wherein the waterproof sound-permeable means has a waterproof sound-permeable membrane having a sound transmission loss of 5 db or less. By using a waterproof sound-permeable membrane with a sound transmission loss of 5 db or less as the waterproof sound-permeable means, the waterproof property can be improved without impairing the sound-permeable property of the waterproof sound-permeable hood.

The waterproof sound-permeable membrane preferably has at least one porous polytetrafluoroethylene layer. In addition, as the waterproof sound-permeable membrane, a non-woven fabric, mesh or the like that has been made water-repellent and made waterproof can be used.

The waterproof sound-permeable means preferably has at least one protective layer that protects the waterproof sound-permeable membrane. Moreover, it is preferable that at least one layer of the protective layer is fixed to the waterproof sound-permeable membrane.

In the waterproof sound-permeable hood of the present invention, the waterproof sound-permeable means includes a holding member having a caulking tube portion and a holding portion formed at one end of the caulking tube portion, and the holding member is attached to the holding portion. It is preferable that the waterproof sound-permeable membrane is held and fixed to the waterproof material by a caulking tube portion. In the holding member, it is preferable that a gap between the waterproof sound-permeable membrane and the holding portion is sealed with a seal member.

According to the present invention, a waterproof sound-permeable hood excellent in waterproofness and sound quality can be obtained.

It is a perspective view which shows the waterproof sound-permeable hood of the aspect in which a waterproof sound-permeable means has a holding member. It is a side view of the waterproof hood shown in FIG. It is sectional drawing of a holding member. It is a perspective view of a holding member. It is sectional drawing of the holding member fixed to the waterproof material. It is a perspective view which shows the waterproof sound-permeable hood of the aspect in which a waterproof sound-permeable means does not have a holding member. It is a side view of the waterproof sound-permeable hood shown in FIG.

Hereinafter, an embodiment of the waterproof sound-permeable hood of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a waterproof sound-permeable hood in a form in which the waterproof sound-permeable means has a holding member. FIG. 2 is a side view of the waterproof sound-permeable hood shown in FIG.

As shown in FIGS. 1 and 2, the waterproof sound-permeable hood of the present invention is a waterproof sound-permeable hood made of a waterproof material, and is waterproof to at least one portion of the waterproof material facing the wearer's ear. The waterproof sound-transmitting means includes a waterproof sound-transmitting film having a sound transmission loss of 5 db or less.

Waterproof sound-transmitting means The waterproof sound-transmitting means used in the present invention is not particularly limited as long as it has a waterproof sound-transmitting membrane having a sound transmission loss of 5 db or less. As an aspect of the waterproof sound-permeable means used in the present invention, an aspect composed only of the waterproof sound-permeable film; an aspect composed of the waterproof sound-permeable film and a protective layer protecting the waterproof sound-permeable film; The aspect comprised from a sound-permeable film and the holding member mentioned later etc. are mentioned.

Waterproof sound-permeable membrane A waterproof sound-permeable membrane (hereinafter sometimes simply referred to as a waterproof sound-permeable membrane) having an acoustic transmission loss of 5 db or less used for the waterproof sound-permeable means will be described.

The waterproof sound-permeable membrane has an acoustic transmission loss of 5 db or less, preferably 3 db or less, more preferably 1 db or less. If the sound transmission loss exceeds 5 db, the sound transmission loss of the waterproof sound-transmitting means increases, and a waterproof sound-permeable hood with excellent sound transmission cannot be obtained. The lower limit of the sound transmission loss of the waterproof sound-permeable membrane is not particularly limited, but naturally exceeds 0 db. In addition, the measuring method of the sound transmission loss of the waterproof sound-permeable membrane in the present invention will be described later.

The basis weight of the waterproof sound-permeable membrane is, for example, preferably 0.5 g / m ² or more, more preferably 1 when a porous polytetrafluoroethylene single-layer membrane as described later is used as the waterproof sound-permeable membrane. .0g / m ² or more, further preferably 2.0 g / m ² or more, preferably 20 g / m ² or less, more preferably 10 g / m ² or less, more preferably 5 g / m ² or less. If the basis weight of the waterproof sound-permeable membrane is less than 0.5 g / m ² , there may be a problem in handling at the time of manufacture, and if it exceeds 20 g / m ² , the sound permeability of the waterproof sound-permeable means tends to decrease . The basis weight of the waterproof sound-permeable membrane can be determined, for example, by cutting the waterproof sound-permeable membrane into 10 cm square and measuring its mass with a precision balance.

The thickness of the waterproof sound-permeable membrane is preferably 3 μm or more, more preferably 4 μm or more, further preferably 5 μm or more, preferably 150 μm or less, more preferably 33 μm or less, and even more preferably 10 μm or less. If the thickness of the waterproof sound-permeable membrane is less than 3 μm, there may be a problem in handling at the time of manufacture, and if it exceeds 150 μm, the sound permeability of the waterproof sound-permeable means tends to be lowered. The measurement of the thickness of the waterproof sound-permeable membrane is based on the average thickness measured with a dial thickness gauge (measured using a 1/1000 mm dial thickness gauge manufactured by Teclock Co., Ltd. with no load other than the main body spring load).

The waterproof sound-permeable membrane is not particularly limited as long as the sound transmission loss is 5 db or less, and may be a single layer film or a multilayer film in which two or more layers are laminated. Examples of the material forming the waterproof sound-permeable membrane include a number of polymer materials including, for example, silicone rubber; polyurethane; polyamide; polyester; polyolefin such as polyethylene and polypropylene; Examples of the fluoropolymer include polyvinylidene fluoride (PVDF), tetrafluoroethylene-hexafluoropropylene copolymer (FEP), tetrafluoroethylene- (perfluoroalkyl) vinyl ether copolymer (PFA), and polytetrafluoroethylene (PTFE). Is preferred. In addition, as the waterproof sound-permeable membrane, a non-woven fabric, mesh, or the like that has been made water-repellent and made waterproof can be used.

As the waterproof sound-permeable membrane used in the present invention, one having at least one layer of porous polytetrafluoroethylene (hereinafter sometimes referred to as “porous PTFE film”) is suitable. In this case, as the waterproof sound-permeable membrane, a single layer film made of only a porous PTFE film layer or a multilayer film in which a porous PTFE film layer and a layer made of another material are laminated can be used. Among these, from the viewpoint of sound permeability of the waterproof sound-permeable membrane, a single-layer membrane composed only of a porous PTFE film layer is more preferable.

The porous PTFE film is formed from a paste formed by mixing polytetrafluoroethylene (PTFE) fine powder with a molding aid, and then removed from the molding aid and then planarized at a high temperature and high speed. It is obtained by stretching and has a porous structure. That is, the porous PTFE film is composed of nodes that are aggregates of primary particles of polytetrafluoroethylene interconnected by minute crystal ribbons, and fibrils that are bundles of extended crystal ribbons drawn from these primary particles. It consists of. A space defined by a node connecting the fibril and the fibril is a hole. The porosity, maximum pore diameter, etc. of the porous PTFE film described later can be controlled by the draw ratio.

The maximum pore diameter of the porous PTFE film is preferably 0.01 μm or more, more preferably 0.1 μm or more, preferably 15 μm or less, more preferably 10 μm or less. If the maximum pore diameter is less than 0.01 μm, the production becomes difficult. On the other hand, if it exceeds 15 μm, the waterproof property of the porous PTFE film tends to decrease and the film strength becomes weak. It tends to be difficult to handle.

The porosity of the porous PTFE film is preferably 50% or more, more preferably 60% or more, preferably 98% or less, more preferably 95% or less. If the porosity of the porous PTFE film is 50% or more, the sound permeability of the film can be secured, and if it is 98% or less, the strength of the film can be secured.

The maximum pore diameter of the porous PTFE film is a value measured in accordance with ASTM F-316. The porosity of the porous PTFE film is calculated by the following formula using the apparent density (ρ) measured in accordance with the apparent density measurement of JIS K 685, and the true density of PTFE is 2.2 g / cm ^3. Ask.
Porosity (%) = 100 × (2.2−ρ) /2.2

The air permeability of the porous PTFE film is preferably as large as possible. When expressed by the Gurley number, it is preferably 50 sec or less, more preferably 10 sec or less. When the air permeability of the porous PTFE film exceeds 50 sec in terms of Gurley number, the sound permeability of the porous PTFE film is lowered. The air permeability (Gurley number) of the porous PTFE film is measured according to JIS P 8117.

The porous PTFE film is preferably used by coating the inner surface of the pores with a polymer having water repellency and oil repellency. When contaminants such as machine oils, beverages, and laundry detergent penetrate or are retained in the pores of the porous PTFE film, the hydrophobicity of the porous PTFE film is lowered and the waterproof property is impaired. However, by coating the porous inner surface of the porous PTFE film with a polymer having water repellency and oil repellency (hereinafter sometimes referred to as a coating polymer), contaminants such as machine oils, beverages, and laundry detergents are prevented. This is because permeation or retention in the pores of the porous PTFE film can be suppressed.

As the coating polymer, for example, a polymer having a fluorine-containing side chain can be used. Details of such a polymer and a method for compounding it with a porous PTFE film are disclosed in WO94 / 22928 and the like, and an example thereof is shown below.

Examples of the coating polymer include a polymer having a fluorine-containing side chain obtained by polymerizing a fluoroalkyl acrylate and / or a fluoroalkyl methacrylate represented by the following general formula (1) (the fluorinated alkyl portion has 6 to 16 carbon atoms). It is preferable to have an atom).

(In the formula, n is an integer of 3 to 13, and R is hydrogen or a methyl group.)

In order to coat the pores of a porous PTFE film using this polymer, an aqueous microemulsion of this polymer (average particle size 0.01 μm to 0.5 μm) is added to a fluorine-containing surfactant (for example, ammonium perfluoroocta Nate) is impregnated into the pores of the porous PTFE film and then heated. This heating removes water and the fluorine-containing surfactant, and the polymer having fluorine-containing side chains melts to coat the inner surface of the pores of the porous PTFE film while maintaining the continuous pores. A porous PTFE film excellent in water and oil repellency can be obtained.

Further, as other coating polymer, “AF polymer” manufactured by DuPont, “CYTOP (registered trademark)” manufactured by Asahi Glass Co., Ltd., and the like can be used. In order to coat the inner surface of the porous PTFE film with these polymers, for example, the polymer is dissolved in an inert solvent such as “FLUORINERT (registered trademark)” manufactured by 3M, and porous PTFE is used. After impregnating the film, the solvent may be removed by evaporation.

Protective layer The waterproof sound-permeable means used in the present invention preferably has at least one protective layer that protects the waterproof sound-permeable membrane. By having the protective layer, it is possible to prevent external force from being applied to the waterproof sound-permeable membrane when using the waterproof sound-permeable hood, and it is possible to suppress damage to the waterproof sound-permeable membrane. The waterproof sound-transmitting means preferably has a protective layer on both sides of the waterproof sound-transmitting means.

The protective layer is not particularly limited as long as it does not impair the effects of the present invention. As the protective layer, a porous member such as mesh, net, foam rubber, sponge, non-woven fabric, woven fabric, or knit is preferable because it has sufficient strength and can ensure sound permeability of the waterproof sound-transmitting means. . In these porous members, it is preferable that through holes having substantially the same shape are uniformly formed over the entire surface. If through-holes of approximately the same shape are formed uniformly over the entire surface, the sound transmission and strength are uniform over the entire surface, so waterproof sound transmission with uniform sound transmission and strength over the entire surface. Means are obtained.

The thickness of the protective layer is preferably 10 μm or more, more preferably 100 μm or more, preferably 1000 μm or less, more preferably 500 μm or less. If the thickness of the protective layer is less than 10 μm, a problem arises in handling at the time of manufacture. The method for measuring the thickness of the protective layer is the same as that of the waterproof sound-permeable membrane.

When a porous member is used as the protective layer, the maximum pore diameter of the protective layer is preferably 10 μm or more, more preferably 100 μm or more, preferably 5 mm or less, more preferably 1 mm or less. If the maximum pore diameter of the protective layer is less than 10 μm, the sound permeability of the waterproof sound-transmitting means may be significantly reduced. Conversely, if it exceeds 5 mm, the opening portion becomes too large, and the protective effect of the waterproof sound-transmitting means is increased. May not be obtained. The maximum pore diameter can be measured using a microscope.

Further, the porosity of the protective layer is preferably 10% or more, more preferably 50% or more, preferably 95% or less, more preferably 90% or less. If the porosity of the protective layer is 10% or more, the sound permeability of the waterproof sound-transmitting means can be secured, and if it is 90% or less, the strength of the protective layer can be secured, Means can be effectively protected. The porosity is measured in the same manner as the waterproof sound-permeable membrane.

Examples of the material of the protective layer include polyolefin resins such as polyethylene and polypropylene; polyester resins such as polyethylene terephthalate and polycarbonate; thermoplastic resins such as polyimide resins; and metals such as stainless steel. As will be described later, when the protective layer is fixed to the waterproof sound-permeable membrane, it can be fused with the waterproof sound-permeable membrane by thermal lamination without using an adhesive. Also, a thermoplastic resin having a low melting point is suitable.

Specific examples of the protective layer are exemplified by trade names such as “Net Eyelet # 25” manufactured by Morito. A specific example of the protective layer to be in close contact with the waterproof sound-permeable membrane is exemplified by a trade name, for example, “Conwed (registered trademark) net XN6065” manufactured by Nippon Steel Plast Co., Ltd.

In the soundproof sound-transmitting means used in the present invention, it is preferable that at least one layer of the protective layer is fixed to the waterproof sound-permeable film.

The waterproof sound-permeable membrane needs to be thin to ensure the sound-permeable property of the waterproof sound-permeable means, and pinholes and tears can easily occur due to load during washing, etc., and there is a risk that the waterproof properties will be lost. . Therefore, it is preferable that at least one of the protective layers is fixed to the waterproof sound-permeable membrane and the waterproof sound-permeable membrane is supported. The protective layer may be fixed to one side of the waterproof sound-permeable membrane, or may be fixed to both sides, but from the viewpoint of sound permeability of the soundproof sound-transmitting means, only the one side of the waterproof sound-permeable membrane is used. It is preferable to fix the protective layer.

As the protective layer fixed to the waterproof sound-permeable membrane, it is preferable to use a resin net or a nonwoven fabric from the viewpoint of strength and fusibility. Examples of the resin net include "Delnet (registered trademark) (RB0404-12P) RB0404-12P" manufactured by DelStar Technologies. Examples of the resin nonwoven fabric include “ECOOL (registered trademark) (polyester nonwoven fabric) 3151A” manufactured by Toyobo Co., Ltd. from the viewpoint of sound transmission.

The method for fixing the protective layer to the waterproof sound-permeable membrane is not particularly limited, and examples thereof include adhesion using an adhesive and fusion by heat lamination. When an adhesive is used, when a porous body is used as the waterproof sound-permeable membrane, a large amount of pores of the waterproof sound-permeable membrane are blocked by the adhesive, and the sound-transmitting property of the waterproof sound-permeable means May be significantly reduced. However, if a thermoplastic resin having a melting point lower than that of the waterproof sound-permeable membrane is used as a protective layer material and fused by thermal lamination, the number of pores of the waterproof sound-permeable membrane that is blocked by the thermoplastic resin is suppressed. This is preferable because it can suppress a decrease in sound permeability of the waterproof sound-permeable means.

When the protective layer is fixed to the waterproof sound-permeable membrane, the sound transmission loss of the waterproof sound-permeable membrane to which the protective layer is fixed (hereinafter sometimes referred to as a laminated waterproof sound-permeable membrane) is preferably 5 db or less, more preferably. Is 4 db or less, more preferably 3 db or less. If the sound transmission loss of the laminated waterproof sound-permeable membrane exceeds 5 db, the sound transmission loss of the waterproof sound-transmitting means becomes large, and a waterproof sound-permeable hood excellent in sound permeability cannot be obtained. In addition, the measuring method of the sound transmission loss of the laminated waterproof sound-permeable membrane in the present invention is the same as that of the waterproof sound-permeable membrane.

Holding member In the waterproof sound-permeable hood of the present invention, the waterproof sound-permeable means includes a holding member having a caulking tube portion and a holding portion formed at one end of the caulking tube portion, the holding member holding It is preferable that the waterproof sound-permeable membrane is held in a portion and fixed to the waterproof material by a caulking tube portion.

An example of waterproof sound-transmitting means using a holding member will be described with reference to FIGS. FIG. 3 is a cross-sectional view of the holding member. FIG. 4 is a perspective view of the holding member. FIG. 5 is a cross-sectional view of the holding member fixed to the waterproof material.

Holding member The holding member 20 includes a caulking tube portion 21 and a holding portion 22 formed to have an outer diameter that is larger by the amount involved when the waterproof sound-permeable membrane is held around one end portion of the caulking tube portion 21. Yes. Moreover, in this aspect, the waterproof sound-permeable membrane 11 has

protective layers

12 a and 12 b on both surfaces thereof, and the protective layer 12 a is fixed to the waterproof sound-permeable membrane 11. Then, as shown in FIGS. 3 and 4, after the waterproof sound-permeable membrane 11 and the

protective layers

12a and 12b are superposed on the holding portion 22, the waterproof sound-permeable membrane is wound around the periphery of the holding portion 22 inside. 11 and the peripheral portions of the

protective layers

12 a and 12 b are sandwiched by the holding portion 22.

The material of the holding member 20 is not particularly limited, and examples thereof include metals such as brass and resins.

The inner diameter of the caulking tube portion is not particularly limited, but is preferably 3 mm or more, more preferably 5 mm or more, further preferably 8 mm or more, preferably 80 mm or less, more preferably 60 mm or less, and further preferably 40 mm or less. By setting the inner diameter of the caulking tube portion to 3 mm or more and 80 mm or less, the sound-transmitting property of the waterproof sound-transmitting means is ensured, and the attachment work to the waterproof material becomes easy.

Further, as shown in FIG. 3, in the holding member 20, the gap between the waterproof sound-permeable membrane 11 and the holding portion 22 is preferably sealed by a seal member 23.

By sealing the gap between the waterproof sound-permeable membrane and the holding portion 22 with the seal member 23, the waterproof performance of the waterproof sound-permeable hood can be further improved. Examples of the sealing member used for the sealing include resins such as silicone resins, polyamide resins, polyester resins, polyvinyl acetate resins, and polyurethane resins. These resins may be used alone or as a mixture of two or more. Can be used.

Then, as shown in FIG. 5, the holding member 20 directly penetrates and penetrates the waterproof material 2 to be attached by the caulking tube portion 21 to the caulking tube portion 21 protruding to the opposite side of the waterproof material 2. After the female ring 24 is externally fitted, the tip of the caulking tube portion 21 is crushed by pressing from the inside direction, and is attached and fixed to the waterproof material 2. As described above, by using the holding member, it is possible to form an opening for sound transmission to the waterproof material and to attach the prevention sound transmission film at a time, so that workability is improved.

Waterproof sound-permeable hood The structure of the waterproof sound-permeable hood of the present invention will be described with reference to FIGS. 1 and 2.

The waterproof sound-permeable hood of the present invention is made of a waterproof material, and is characterized in that a waterproof sound-permeable means is provided on at least one of the waterproof material facing the wearer's ear.

The waterproof sound-permeable hood of the present invention is not only used alone as a hood, but also attached to rain clothes such as rain jackets and rain coats, and those that are detachable from these rain clothes. including.

As shown in FIG. 1 and FIG. 2, the waterproof sound-permeable hood 1 of the present invention is composed of the waterproof material 2, and the structure of the waterproof sound-permeable hood 1 body is the wearer's head (the top, the temporal region, It is configured to cover the back of the head). The structure of the waterproof sound-permeable hood 1 main body is not particularly limited as long as it is configured to cover at least the wearer's head, and may be configured to cover the cheek or neck of the wearer, for example. The connection part with rain clothes, such as a rain jacket, may be integrally formed.

The waterproof material is not particularly limited as long as it is waterproof, and includes, for example, a waterproof sheet made of resin or rubber; a waterproof fabric in which a fabric such as a woven fabric or a knitted fabric is impregnated with a resin or rubber; a woven fabric or a knitted fabric And a waterproof laminate in which sheets of resin and rubber are laminated. Since the waterproof laminate can improve the feel of the wearer, it is preferable that a woven fabric or a knitted fabric is laminated as a lining. Among these, as the waterproof material constituting the waterproof sound-permeable hood of the present invention, a waterproof material mainly composed of a fabric and having a waterproof and moisture permeable membrane and a lining laminated is suitable.

As the resin and rubber used in the waterproof sheet and waterproof fabric, polyurethane resin, polyester resin such as polyethylene terephthalate and polybutylene terephthalate, acrylic resin, polyolefin resin such as polyethylene and polypropylene, polyamide resin, vinyl chloride resin, synthetic resin Examples thereof include rubber, natural rubber, and fluorine-containing resin.

Further, the fibers constituting the woven fabric or knitted fabric may be either natural fibers or synthetic fibers. Examples of the natural fiber include plant fibers such as cotton and hemp, and animal fibers such as silk, wool and other animal hairs. Examples of the synthetic fiber include polyamide fiber, polyester fiber, and acrylic fiber. In particular, when used for clothing products, polyamide fibers, polyester fibers, and the like are preferable from the viewpoints of flexibility, strength, durability, cost, lightness, and the like.

Moreover, as a waterproof laminated body which laminated | stacked the cloths, such as the said textile fabric and a knitted fabric, and the sheet | seat which consists of resin or rubber | gum, it is a preferable aspect to use a waterproof moisture-permeable sheet as a waterproof sheet which comprises a waterproof laminated body. The waterproof and moisture-permeable sheet is a flexible sheet having “waterproofness” and “moisture permeability”. That is, in addition to the above “waterproofness”, “moisture permeability” can be imparted to the waterproof laminate. For example, sweat water vapor generated from the wearer's human body is transmitted to the outside through the waterproof laminate, so that the feeling of stuffiness during wear can be prevented. Here, “moisture permeability” is a property that allows water vapor to pass through. For example, the moisture permeability measured by the JIS L 1099 B-2 method is 50 g / m ² · h or more, more preferably 100 g / m ^2. -It is desirable to have a moisture permeability of h or more.

As the waterproof and moisture-permeable sheet, hydrophilic resin films such as polyurethane resin, polyester resin, silicone resin, polyvinyl alcohol resin, polyolefin resins such as polyester resin, polyethylene, and polypropylene, fluorine-containing resins, and water-repellent treatment were applied. Examples thereof include a porous film made of a hydrophobic resin such as polyurethane resin (hereinafter sometimes simply referred to as “hydrophobic porous film”). Here, the “hydrophobic resin” is preferably formed by molding a smooth flat plate using a resin, and the contact angle of water droplets placed on the surface of the plate is 60 degrees or more (measurement temperature 25 ° C.). Means a resin of 80 degrees or more.

The hydrophobic porous sheet maintains moisture permeability by a porous structure having pores (continuous pores) inside, while the hydrophobic resin constituting the sheet substrate allows water to enter the pores. Suppresses and exhibits waterproofness as a whole sheet. Among these, as the waterproof and moisture-permeable sheet, a porous film made of a fluorine-containing resin is preferable, and a porous PTFE film is more preferable.

The shape and size of the waterproof sound-transmitting means provided in the waterproof sound-permeable hood according to the present invention and the number of the waterproof sound-transmitting means are not particularly limited, and may be appropriately changed according to the waterproof sound-permeable membrane, the protective layer and the holding member to be used. For example, when a porous PTFE film is used as the waterproof sound-permeable membrane and a holding member having an inner diameter of 9 mm in the caulking cylinder portion is used, the number of waterproof sound-permeable means attached is preferably 1 or more and 6 or less.

Other Embodiments Hereinafter, with reference to FIG. 6 and FIG. 7, an embodiment in which the holding member is not used will be described as another embodiment of the waterproof sound-permeable hood of the present invention. FIG. 6 is a perspective view showing a waterproof sound-permeable hood in a form in which the waterproof sound-permeable means does not have a holding member. FIG. 7 is a side view of the waterproof sound-permeable hood shown in FIG.

In the waterproof sound-permeable hood of this aspect, the waterproof sound-permeable means 10 does not have a holding member, and is composed of only the waterproof sound-permeable membrane 11 or a laminate of the waterproof sound-permeable membrane 11 and a protective layer 12. Yes. The waterproof sound passing means 10 is attached so as to close the sound passing opening 2 a formed in the waterproof material 2 constituting the waterproof hood 1. The method for attaching the waterproof sound-transmitting means 10 is not particularly limited. For example, after the waterproof sound-transmitting membrane 11 and the protective layer 12 are cut to a desired size, the waterproof material 2 is closed so as to close the sound-transmitting opening 2a. May be sewn or fused.

Sewing between the waterproof sound-permeable membrane or the laminated waterproof sound-permeable membrane and the waterproof material can be performed using a sewing machine or the like. As the sewing thread used for sewing, any material made of cotton, silk, hemp, polynosic, polyamide resin, polyester resin, vinylon resin, polyurethane resin or the like may be used alone, but strength, heat resistance, etc. From this point of view, it is preferable to use a polyamide resin or a polyester resin. The thickness of the sewing thread may be appropriately adjusted according to the thickness of the laminate to be sewn and the required product strength. The sewing method is not particularly limited as long as it is a method of sewing using one or a plurality of threads, but as a stitch format, a straight stitch, a single-ring stitch, a double-ring stitch, or the like is appropriately used. The shape, curve shape, zigzag shape and the like can be exemplified.

Further, the fusion of the waterproof sound-permeable membrane or the laminate of the waterproof sound-permeable membrane and the support is performed using, for example, a sheet made of a hot melt resin (hereinafter, sometimes simply referred to as “hot melt sheet”). The method of fusing indirectly etc. can be mentioned. Examples of the hot melt sheet include “Gore Seam (registered trademark) Sheet Adhesive” manufactured by Japan Gore-Tex. In addition, as the hot melt resin of the hot melt sheet, the same one used for the hot melt resin layer of the sealing tape described later can be used, and the conditions for fusing using the hot melt sheet are as follows: The same conditions can be employed as for crimping the sealing tape.

Further, as shown in FIG. 6, it is preferable that a sealing process is applied to a portion where the waterproof sound-permeable membrane or the laminated waterproof sound-permeable membrane is sewn or fused. By performing the sealing treatment, it is possible to further improve the waterproofness and the strength of the obtained waterproof sound-permeable hood.

The sealing treatment method is not particularly limited as long as it is a method that can ensure waterproofness for the sewn part or the fused part. For example, when a waterproof sound-permeable membrane or a laminated waterproof sound-permeable membrane and a waterproof material are sewn, a method of closing the needle hole portion with a resin is preferable because high waterproof properties can be achieved. Examples of the method for preventing the needle hole portion with resin include a method of applying a resin to the stitched portion, and a method of adhering or fusing a tape-like resin (sealing tape). It is more preferable because it is excellent in the waterproof durability of the stop processing portion. Further, when the waterproof sound-permeable membrane or the laminated waterproof sound-permeable membrane and the waterproof material are fused, the strength of the obtained waterproof sound-permeable hood is lowered. By carrying out the stop treatment, the strength of the waterproof sound-permeable hood obtained is improved.

As the sealing tape used for the waterproof sound-permeable hood of the present invention for sealing the stitched portion or the fused portion, a low melting point is formed on the back surface (sewn surface side) of the base tape of the high melting point resin. A tape formed by laminating an adhesive resin is suitably used, and a sealing tape in which a hot melt resin layer is provided on the back surface of the base tape is preferable. A knit, mesh, or the like may be laminated on the surface (surface exposed to the outside) of the base tape. Examples of the sealing tape include sealing tapes such as “T-2000” and “FU-700” manufactured by San Kasei Co., Ltd., which use a polyurethane resin film as a base tape and a polyurethane hot melt resin as an adhesive resin. “GORE-SEAMTAPE” manufactured by Japan Gore-Tex Corp. using a sealing tape such as “MF-12T2” and “MF-10F” manufactured by Sakusha Co., Ltd. Or the like can be used as appropriate.

The hot melt resin of the sealing tape includes polyethylene resin or copolymer resin thereof, polyamide resin, polyester resin, butyral resin, polyvinyl acetate resin or copolymer resin thereof, cellulose derivative resin, polymethyl methacrylate. Various resins such as resin, polyvinyl ether resin, polyurethane resin, polycarbonate resin and polyvinyl chloride resin can be appropriately used alone or as a mixture of two or more, but when used for clothing products, polyurethane Based resins are preferred.

The thickness of the hot melt resin layer of the sealing tape is preferably 25 μm or more, more preferably 50 μm or more, preferably 400 μm or less, more preferably 200 μm or less. If the hot melt resin layer is less than 25 μm, the amount of resin is too small, and it is difficult to completely block the uneven portions of the thread in the needle hole portion, and the waterproofness of the sewn portion may be insufficient. On the other hand, when the thickness of the hot melt resin layer exceeds 400 μm, it takes time until the tape is sufficiently melted when it is thermocompression bonded, resulting in a decrease in productivity or thermal damage to the waterproof sound-transmitting means to be bonded. May occur. Further, when the thermocompression bonding time is shortened, the hot melt resin layer is not sufficiently dissolved, and sufficient adhesive strength and waterproofness cannot be obtained.

These sealing tapes can be fused with an existing hot air sealer in which hot air is applied to the hot melt resin layer side of the tape, and the resin is melted to press-bond to the adherend with a pressure roll. For example, “QHP-805” manufactured by Quinlight Electronics Seiko Co., Ltd. L. “5000E” manufactured by GORE & ASSOCIATES can be used. Moreover, in order to fuse a short sewing part more easily, the sealing tape may be thermocompression bonded with a commercially available hot press or iron. At this time, heat and pressure are applied from above the seam tape in a state where the sealing tape is overlapped on the sewing part. The thermocompression bonding conditions of the sealing tape may be appropriately set depending on the softening point of the hot melt resin used for the tape, the fusion speed, and the like.

Hereinafter, the present invention will be described in detail by way of examples. However, the present invention is not limited to the following examples, and all modifications and embodiments without departing from the gist of the present invention are not limited thereto. Included in range.

Evaluation method 1. Sound transmission loss The sound transmission loss was measured using "Transmission loss tube kit (Type 4206-T)" and "PULSE acoustic vibration analysis hardware (Type 3560-C)" manufactured by Brüel & Kjær. The measurement conditions were such that the transmission loss tube kit used a small tube (inner diameter 29 mm) and the noise generated from the sound source was 120 db. The measurement was performed in a state in which the end opposite to the end where the sound source of the transmission loss tube was disposed was closed and in an open state. Then, sound transmission loss was determined using analysis software “PULSE LabShop Version 10.1.0.15” manufactured by Brüel & Kjær.

2. Waterproofness The waterproofness of the waterproof sound-permeable hood was evaluated by conducting an artificial rainfall test under conditions of precipitation of 50 mm / h or more and 30 minutes using an artificial rain chamber, and visually confirming the presence or absence of water leakage.

3. Washing durability The washing durability of the waterproof sound-permeable hood was evaluated by performing the waterproofing test after 20 washing processes.
In the washing process, a washing process was performed using a fully automatic washing machine for home use (manufactured by Matsushita Electric Industrial Co., Ltd., model number “NA-F70PX1”) and suspended and dried at room temperature for 24 hours. 40 liters of tap water and 30 g of synthetic detergent for washing (manufactured by Kao Corporation, “Attack (registered trademark)”) were used for 6 minutes, followed by rinsing twice and dehydration for 3 minutes.

4). Sound permeability The side of the experimenter wearing a rain jacket (Japan Gore-Tex, “R03 rain jacket”) with or without a hood obtained in the following manufacturing example, A bell type alarm clock (manufactured by DAILY, “G07Y5G”) was installed at a position 2 m away from the experimenter so as to face one ear of the experimenter. Then, the bell-type alarm clock is sounded with or without the hood, and the noise near the experimenter's ears at that time is measured by a sound level meter (ordinary sound level meter “NL-20” manufactured by Rion). It was measured. In addition, when the hood was worn, the detection part of the sound level meter was arranged inside the hood.

Laminated waterproof sound-permeable membrane As a waterproof sound-permeable membrane, porous PTFE film (manufactured by Japan Gore-Tex, thickness: 8.5 μm, basis weight; 2.3 g / m ² , air permeability (Gurley number); 0.032 sec, pores rate: 87.4%), as a protective layer, a polypropylene mesh (Nisseki plasto Co., "Kon'weddo (R) Internet (thickness; 0.48 .mu.m, basis weight: 100 g / m ^2)" using), these Was fixed by thermal lamination (170 ° C., 5 seconds) to prepare a mesh laminate as a laminated waterproof sound-permeable membrane. Sound transmission loss was measured for the obtained mesh laminate. The results are shown in Table 1.

Waterproof material with waterproof sound-permeable means The mesh laminate, which is the laminated waterproof sound-permeable film obtained above, is attached to a waterproof material (Japan Gore-Tex, "EB FPL70WDH / 6366-WR"), and waterproof with sound-proof means The material was made. For attaching the mesh laminate, a net eyelet (manufactured by Morito, inner diameter of caulking tube portion: 9 mm, protective layer: wire netting) was used as a holding member, and the number of attachments was one. The gap between the mesh eyelet holding portion and the mesh laminate was sealed with a silicone resin.

That is, the structure of the waterproof sound-transmitting means of the present embodiment will be specifically described with reference to FIG. 5. The cloth is the waterproof material 2, the porous PTFE film constituting the mesh laminate is the waterproof sound-transmitting film 11, polypropylene. The mesh corresponds to the protective layer 12a. Further, the mesh eyelet corresponds to the holding member 20 and the female ring 24, the wire mesh of the mesh eyelet corresponds to the protective layer 12b, and the silicone resin corresponds to the seal member 23.

The sound transmission loss was measured for the obtained waterproof material with waterproof sound-transmitting means. As a comparative example, sound transmission loss was measured for the waterproof material and for the waterproof material provided with an opening having an inner diameter of 10 mm. The results are shown in Table 1.

Waterproof hood manufacturing example 1
Using a waterproof laminate (“EB FPL70WDH / 6366-WR” manufactured by Japan Gore-Tex Co., Ltd.) as a waterproof material, this waterproof laminate was sewn to produce a waterproof hood. The stitched portion was sealed with a sealing tape (Japan Gore-Tex, “Gore Seam (registered trademark) tape”). Waterproof sound-transmitting means were attached to portions of the obtained waterproof hood that face the right and left ears of the wearer to prepare a waterproof sound-permeable hood. The structure of the waterproof sound-transmitting means was the same as that used for the waterproof material with the waterproof sound-transmitting means, and the number of attachments was one for each part facing the wearer's right and left ears.

When the obtained waterproof sound-permeable hood was tested for waterproofness and washing durability, no water leakage was observed in any of the tests. In addition, a sound permeability test was performed on the waterproof sound-permeable hood. The results are shown in Table 2.

Production Example 2
A waterproof hood was produced using the same waterproof laminate and sealing tape as in Production Example 1. The obtained waterproof hood was subjected to a sound permeability test. The results are shown in Table 2.

Production Example 3
A waterproof hood was prepared using the same waterproof laminate and sealing tape as in Production Example 1. An opening having an inner diameter of 25 mm was formed in each portion facing the right and left ears of the wearer of the obtained waterproof hood to produce a sound hood. The obtained sound hood was subjected to a sound permeability test. The results are shown in Table 2.

The present invention is useful for a waterproof hood excellent in waterproofness and sound permeability.

1: Waterproof hood, 2: Waterproof material, 2a: Sound passage opening, 3: Sealing tape, 10: Waterproof sound passage means, 11: Waterproof sound passage membrane, 12: Protective layer, 20: Holding member, 21: Caulking tube portion, 22: holding portion, 23: seal member, 24: female ring

Claims

A waterproof sound hood composed of a waterproof material,
The waterproof material is provided with at least one of the portions facing the ears of the wearer of the waterproof material,
The waterproof sound-permeable hood, wherein the waterproof sound-permeable means has a waterproof sound-permeable film having a sound transmission loss of 5 db or less.
The waterproof sound-permeable hood according to claim 1, wherein the waterproof sound-permeable membrane has at least one porous polytetrafluoroethylene layer.
The waterproof sound-permeable hood according to claim 1 or 2, wherein the waterproof sound-permeable means has at least one protective layer that protects the waterproof sound-permeable membrane.
The waterproof sound-permeable hood according to claim 3, wherein at least one of the protective layers is fixed to the waterproof sound-permeable film.
The waterproof sound-transmitting means is
A holding member having a crimping cylinder part and a holding part formed at one end of the crimping cylinder part;
The waterproof sound-permeable hood according to any one of claims 1 to 4, wherein the holding member holds the waterproof sound-permeable membrane in a holding portion and is fixed to the waterproof material by a caulking tube portion.
The waterproof sound-permeable hood according to claim 5, wherein the holding member has a gap between the waterproof sound-permeable membrane and the holding portion sealed with a seal member.