WO2023276500A1 - Soft texture body - Google Patents

Soft texture body Download PDF

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Publication number
WO2023276500A1
WO2023276500A1 PCT/JP2022/021471 JP2022021471W WO2023276500A1 WO 2023276500 A1 WO2023276500 A1 WO 2023276500A1 JP 2022021471 W JP2022021471 W JP 2022021471W WO 2023276500 A1 WO2023276500 A1 WO 2023276500A1
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WO
WIPO (PCT)
Prior art keywords
container
soft tactile
lid
filler
liquid
Prior art date
Application number
PCT/JP2022/021471
Other languages
French (fr)
Japanese (ja)
Inventor
亜星ウイリアム 川口
慎也 三添
Original Assignee
積水ポリマテック株式会社
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Application filed by 積水ポリマテック株式会社 filed Critical 積水ポリマテック株式会社
Publication of WO2023276500A1 publication Critical patent/WO2023276500A1/en

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F11/00—Methods or devices for treatment of the ears or hearing sense; Non-electric hearing aids; Methods or devices for enabling ear patients to achieve auditory perception through physiological senses other than hearing sense; Protective devices for the ears, carried on the body or in the hand
    • A61F11/06—Protective devices for the ears
    • A61F11/08—Protective devices for the ears internal, e.g. earplugs
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
    • C08L83/04—Polysiloxanes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception

Definitions

  • the present invention relates to a soft tactile body that can be used as a contact member with the human body.
  • a soft tactile body is used as a contact member suitable for contact with the human body.
  • the soft tactile body can be configured as an earpiece, such as an earphone, an earplug, or a hearing aid, which is inserted into the ear canal, or a cushion body such as a cushion pad or cushion.
  • An earpiece is a soft tactile object that is inserted into a wearer's ear canal, and various types are known.
  • Patent Document 1 is an invention aimed at providing earplugs that are easy to remove and have excellent soundproofing and waterproofing effects.
  • the main body of the earplug is made of a material having plasticity and is entirely covered with a plastic film.
  • Patent Document 2 The technique described in Japanese Utility Model Registration No. 3096024 (Patent Document 2) aims to provide an ear tip for a stethoscope that is flexible, fits easily to the shape of the ear, and is comfortable to wear. It is an idea. Since liquid or air is injected into the inside of the peripheral wall of the ear insert portion of the ear tip, it feels soft to the touch.
  • Patent Document 1 a plastic film is used for the outer skin.
  • plastic films are flexible, but are not deformed by elongation. Therefore, it is difficult to deform the plastic film so as to adhere to the inner surface of the ear canal. Therefore, even if an attempt is made to use the material of the main body of the earplug, which has plasticity, for the cushion body, the good tactile sensation of the material is lost due to the plastic film of the outer skin.
  • Patent Document 2 it is difficult to form a hollow cavity inside the portion to be inserted into the ear, and liquid is injected into this cavity.
  • One aspect of the present disclosure is a soft tactile body in which a filler is enclosed in a container body, wherein the filler is a liquid mixture containing a liquid diene-based polymer, a silicone compound having a hydrosilyl group, and a catalyst. It is a gel-like crosslinked polymer of the composition. According to one aspect of the present disclosure, the gel-like crosslinked polymer does not bleed to the outside of the coating made of the rubbery elastic membrane. Therefore, the soft tactile body is less likely to change over time.
  • the liquid diene-based polymer includes a skeleton of polybutadiene, polyisoprene, chloroprene, or block or random copolymers thereof. Since the liquid diene-based polymer contains any skeleton of polybutadiene, polyisoprene, chloroprene, or a block or random copolymer thereof, it reacts and cures with a silicone compound having a hydrosilyl group to form a gel-like crosslinked polymer. can be obtained.
  • the liquid diene-based polymer has a viscosity at 30°C of 1 to 500 Pa ⁇ s. Since the viscosity of the liquid diene polymer is 1 to 500 Pa ⁇ s, the viscosity of the liquid mixture composition can be kept low, and it is easy to pour into the container body. Therefore, it is easy to manufacture a soft tactile material.
  • the content of the silicone compound having a hydrosilyl group is 0.5 to 14 parts by mass with respect to 100 parts by mass of the liquid diene polymer. Since the content of the hydrosilyl group-containing silicone compound is 0.5 to 14 parts by mass with respect to 100 parts by mass of the liquid diene polymer, a soft tactile body with excellent tactile sensation can be obtained.
  • the crosslinked polymer has a penetration of 60 or more based on JISK2207:1996. Since the crosslinked polymer has a penetration of 60 or more based on JISK2207:1996, the container-shaped main body containing the crosslinked polymer as a filler has appropriate deformability, flexibility, and resilience, and is excellent in tactile sensation.
  • the internal space of the container body is filled with the filler by 50 to 100% by volume. Since the filling material fills 50 to 100% by volume of the inner space of the container body, it is possible to maintain an appropriate balance between the flexibility of the rubber-like elastic film of the container-like substrate and the filling material, and the feeling of touch is improved. Are better. If the one mode is an earpiece, it is in close contact with the ear and comfortable to wear. If the one aspect is a cushion body, it is comfortable even when it touches the body.
  • the container body includes a container-shaped base made of a rubber-like elastic film and having an opening at one end, and a lid that liquid-tightly seals the opening. Therefore, the container-like main body can be easily manufactured by fixing the container-like substrate and the lid.
  • the container-shaped substrate is made of a rubber-like elastic film
  • the filler enclosed in the container-shaped body is a liquid mixture composition containing a liquid diene-based polymer, a silicone compound having a hydrosilyl group, and a catalyst. It is a molecule and can be deformed at room temperature. For this reason, the soft tactile body is excellent in tactile sensation, and if the above aspect is an earpiece, it can be flexibly deformed along the shape of the ear hole and worn in the ear. It can change shape by transforming into
  • the container-shaped substrate has a hardness of 5 to 30 using a type A durometer based on JISK6253-3:2012 (JIS-A hardness).
  • a type A durometer based on JISK6253-3:2012 JIS-A hardness
  • the container-like substrate can be brought into close contact with the pressed object by deforming following the shape pressed from the outside. Therefore, if the above aspect is an earpiece, the container-shaped base body can be brought into close contact along the inner surface of the ear canal. If the one aspect is a cushion body, the container-like substrate can be brought into close contact along the body.
  • the container-shaped substrate is hollow annular
  • the lid has an annular plate shape
  • the container body has a rigid cylindrical portion on the inner peripheral portion of the container-shaped body or the lid.
  • the container-like substrate has a hollow annular shape, it can be a soft tactile body having a through hole in the central portion. Therefore, an earpiece suitable for use as an earphone can be obtained, and a cushion pad or the like suitable for use as goggles applied around the eyes can be obtained.
  • the container-like main body has a configuration in which the annular plate-shaped lid body is provided on the hollow annular container-like base body, it can have a simple configuration of at least a two-piece structure.
  • the soft tactile body is either an earpiece or a cushion body. Since the soft tactile body is an earpiece, the earpiece is comfortable to wear on the ear. Further, since the soft tactile body is a cushion body, the cushion body can give a comfortable touch to the body.
  • One aspect of the present disclosure is a method for producing a soft tactile body in which a filler is enclosed in a container body, comprising a liquid mixture composition containing a liquid diene-based polymer, a silicone compound having a hydrosilyl group, and a catalyst. is prepared, and the liquid mixture composition is injected into the inner space of the container body, heated, and the liquid mixture composition is reactively cured to obtain the gel-like filler.
  • the filling material can be injected into the container-like substrate by injecting the liquid mixture composition, which facilitates production. Therefore, the manufacturing unit cost can be reduced, and the yield can be improved.
  • One aspect of the present disclosure is a method for producing a soft tactile body, wherein the temperature at which the liquid mixture composition is reactively cured by heating is 50 to 200°C. If the temperature is lower than 50°C, the reaction time will be long and the production efficiency will be lowered. If the temperature is higher than 200° C., autoxidative deterioration tends to occur. When the temperature is 50 to 200° C., the cross-linking reaction can proceed rapidly and auto-oxidative deterioration can be prevented.
  • One aspect of the present disclosure is a method for manufacturing a soft tactile body, wherein the soft tactile body is either an earpiece or a cushion body. Since the soft tactile body is either an earpiece or a cushion body, the earpiece or the cushion can be easily manufactured.
  • a soft tactile body with excellent tactile sensation can be realized. Moreover, according to one aspect of the present disclosure, a soft tactile body having excellent tactile sensation can be easily manufactured.
  • FIG. 1A is a bottom view and FIG. 1B is a front view of the earpiece of the first embodiment.
  • FIG. 1B is a sectional view taken along line II-II of FIG. 1A;
  • FIG. 2 is an explanatory diagram illustrating a method of manufacturing the earpiece of FIG. 1;
  • FIG. 2 is a cross-sectional view of the earpiece of Modification 1, corresponding to FIG.
  • FIG. 2 is a cross-sectional view of the earpiece of Modification 2, corresponding to FIG. 2 equivalent cross-sectional view of the earpiece of Modified Example 3.
  • FIG. 8A is a front view
  • FIG. 8B is a cross-sectional view corresponding to FIG.
  • FIG. Fig. 10A is a front view
  • Fig. 10B is a sectional view corresponding to Fig. 1B of Fig. 1
  • Fig. 10C is a left side view of the cushion body of Modification 2.
  • Figs. It is a schematic diagram of a load tester.
  • the first embodiment is an earpiece that is one aspect of the present disclosure.
  • FIG. 1 is a bottom view and a front view of an earpiece 10a
  • FIG. 2 is a sectional view.
  • the earpiece 10 a includes an earpiece body 12 and a filler 15 .
  • the earpiece main body 12 includes a container-shaped base body 13 and a lid body 14 .
  • a filler material 15 is enclosed within the earpiece body 12 .
  • the inner peripheral wall 13b which serves as the “inner peripheral portion” of the container-shaped substrate 13, is provided with a hard cylindrical portion 16.
  • the earpiece main body 12 is the container main body composed of the container-shaped base 13 and the lid 14 .
  • the container-shaped substrate 13 is made of a container-shaped rubber-like elastic film. Specifically, the container-like substrate 13 is made of a hollow container-like rubber-like elastic membrane having an opening 13a. An annular cover 14, which will be described later, is fixed to the annular opening 13a.
  • the earpiece main body 12 is formed by sealing the opening 13a with the cover 14 .
  • the earpiece main body 12 has an annular shape with a hole in the center when viewed from above in FIG. 1A so that the through hole 11 is formed in the center of the earpiece 10a. A more specific shape thereof is an annular shape.
  • the lid 14 side has a rectangular shape with corners, whereas the side opposite to the lid 14 has a rounded shape (curved shape).
  • the end of the container-shaped base 13 opposite to the lid 14 has an auricle insertion side end 13d to be inserted into the auricle.
  • the auricle insertion side end portion 13d has an outer curved portion 13d1 curved from the outer peripheral wall 13c of the container-shaped base 13 to the tip.
  • the auricle insertion side end portion 13d has an inner peripheral side curved portion 13d2 that is curved from the inner peripheral wall 13b of the container-shaped base 13 to the tip. Since it has the outer curved portion 13d1, it can be easily inserted into the ear canal. In addition, since the outlet side of the through-hole 11 spreads like a trumpet due to the inner curved portion 13d2, the sound passing through the through-hole 11 easily spreads into the ear.
  • the shape of the container-shaped substrate 13 on the side opposite to the lid 14 may be an overall rounded shape such as a tube with a circular cross section, a bellows shape having a constriction, or a tip end. It can also have a shape that tapers toward the side.
  • the opening 13a which serves as the "fixed end” to the lid 14 and the fixing surface, is formed as a single plane (flat surface) without irregularities so that it can be easily adhered to the flat plate-shaped lid 14. preferably.
  • the opening 13a of the inner peripheral wall 13b and the opening 13a of the outer peripheral wall 13c of the container-shaped substrate 13 can be formed as planes of different heights. Further, since the rubber-like elastic film forming the container-shaped substrate 13 has a small vertical cross-sectional area, if the cross-section is used as the opening 13a as it is, the adhesive area with the lid 14 becomes small and the fixing force becomes poor. .
  • the thickness of the rubber-like elastic film is gradually increased toward the opening 13a, and the length (length t1 in FIG. 3) along the radial direction of the lid 14 at the opening 13a forms the container-like substrate 13. It is longer than the relevant length of the cross section at the average thickness portion of the rubber-like elastic membrane. That is, the length t1 along the radial direction of the lid 14 is longer than the length of the intermediate portion of the outer peripheral wall 13c of the container-shaped base 13 (length t2 in FIG. 3).
  • the upper end side of the inner peripheral wall 13b of the earpiece 10a is not wide.
  • the opening 13a on the upper end side of the inner peripheral wall 13b is also wide like the opening 13a on the upper end side of the outer peripheral wall 13c, it is preferable in that the fixing area with the lid body 14 is widened and the fixing force can be increased. .
  • the container-shaped substrate 13 can be stretched and deformed freely, and preferably has high flexibility and stretchability. Therefore, the container-like substrate 13 is formed of a rubber-like elastic film.
  • a rubber-like elastic body such as thermoplastic elastomer or thermosetting rubber can be used.
  • thermoplastic elastomers include styrene-based elastomers, olefin-based elastomers, polyester-based elastomers, urethane-based elastomers, and polyamide-based elastomers.
  • thermosetting rubber examples include styrene rubber, butadiene rubber, isoprene rubber, nitrile rubber, butyl rubber, chloroprene rubber, ethylene propylene rubber, silicone rubber, acrylic rubber, urethane rubber, and fluororubber.
  • a material that swells and permeates little with respect to the enclosed filler 15 and has low gas permeability to air is preferable.
  • silicone rubber has a small permanent set against compression and tension, is non-adhesive, and has a good surface texture. Moreover, it is preferable in that it is possible to have low hardness and low distortion.
  • the hardness of the rubber-like elastic body forming the container-shaped substrate 13 is preferably in a low hardness range of JIS-A hardness of about 5 to 30, more preferably 10 to 20. Further, it is preferable that the elongation is 200% or more. If the hardness is lower than A hardness of 5, the strength of the rubber-like elastic film may be weakened and easily broken. If the hardness is higher than A hardness 30, it may be difficult to obtain the soft feel of the rubber-like elastic film. If the elongation of the rubber-like elastic body is less than 200%, the possibility that the earpiece 10a will be easily damaged when the earpiece 10a is deformed increases.
  • the JIS-A hardness is a value measured using a type A durometer based on JISK6253-3:2012. Elongation is a measured value (elongation at break) based on JISK6251:2017.
  • the thickness of the rubber-like elastic film of the container-shaped substrate 13 is preferably in the range of 0.1 mm to 2 mm. This is because if the thickness is less than 0.1 mm, it is likely to break, and if the thickness is greater than 2 mm, the properties of the filling material 15 filled inside are difficult to transmit to the outside.
  • the lid 14 is a member that closes the opening 13 a of the container-shaped base 13 and encloses the filler 15 .
  • the lid 14 is preferably formed in a plate shape from the viewpoint of ease of manufacture.
  • the lid 14 is formed as an annular plate having a hole 14a corresponding to the inner peripheral wall 13b of the container-shaped base 13. As shown in FIG. A more specific shape thereof is an annular shape.
  • the lid body 14 is arranged on the central side of the lid body accordingly. and the outer peripheral side may be formed on plate surfaces having different heights.
  • a material similar to that of the container-shaped base 13 can be used as the material forming the lid 14 .
  • the term "similar material” includes the case where both the container-shaped base 13 and the lid body 14 are made of the same material (for example, silicone rubber) and the case where they are made of the same kind of material.
  • the same kind of material means that when the container-shaped substrate 13 is made of one kind of silicone rubber and the lid 14 is made of another kind of silicone rubber, the container-shaped substrate 13 is made of silicone rubber and the lid 14 is made of butyl rubber.
  • the same kind of material means that when the container-shaped substrate 13 is made of one kind of silicone rubber and the lid 14 is made of another kind of silicone rubber, the container-shaped substrate 13 is made of silicone rubber and the lid 14 is made of butyl rubber.
  • lid body 14 and the container-shaped base body 13 are made of the same material, it is preferable in that an adhesive that easily adheres to both the container-shaped base body 13 and the lid body 14 can be easily selected. It is also preferable in that the earpiece 10a as a whole can provide the same tactile sensation.
  • a material different from that of the container-shaped base 13 can be used for the lid 14 .
  • the container-like substrate 13 is a rubber-like elastic film
  • the lid 14 is a resin film or resin plate.
  • the use of a resin film is preferable in that the load is low, the burden on the ears is small, and the manufacturing cost can be suppressed.
  • the hard cylindrical portion 16 is a cylindrical portion made of a hard material that is fixed to the inner periphery of the container-shaped base 13 or the lid 14 .
  • the container-like substrate 13 is made of a harder material than the container-like substrate 13, thereby preventing excessive deformation of the container-like substrate 13, securing the through holes 11 through which sound passes, and furthermore, being made of a hard material. By doing so, it is possible to suppress sound absorption and efficiently transmit sound into the ear.
  • the end of the hard cylindrical portion 16 on the side opposite to the lid 14 is positioned inside the tip of the container-shaped base 13 to prevent the hard cylindrical portion 16 from hitting the ear and also The tip of the shaped substrate 13 is freely deformable.
  • the end of the hard cylindrical portion 16 on the side of the lid 14 extends to the inner peripheral wall 14 b of the lid 14 and is formed so that the end of the hard cylindrical portion 16 is flush with the surface of the lid 14 . ing.
  • the opening 13a of the container-shaped base 13 on the inner peripheral wall 13b side does not need to be thick.
  • the fixing force between the rigid cylindrical portion 16 provided on the container-shaped base 13 side and the rigid cylindrical portion 16 provided on the lid 14 side is increased, and the inner peripheral wall 13b of the container-shaped base 13 and the lid are increased. This is because it is possible to compensate for the weak adhesive force with 14 . Therefore, a wide opening can be provided in the container-like substrate 13, and the filling material 15 can be easily injected into the container-like substrate 13 during the manufacturing process.
  • the hard cylindrical portion 16 has the function of keeping the opening of the container-shaped base 13 wide so that the inner peripheral wall 13b does not lose its shape.
  • the container-shaped substrate 13 is devised so that the filling material 15 can be easily injected.
  • the end portion of the rigid cylindrical portion 16 on the lid body 14 side is fixed to the lid body 14 and functions as a "fixed end portion". Since the lid body 14 continuously seals the lid-side end of the hard tubular portion 16 and the opening 13a of the container-shaped substrate 13, the lid 14 can be fixed to the container-shaped substrate 13, thereby preventing liquid leakage. can be reliably prevented.
  • a hard resin can be used as the material for the hard tubular portion 16, and a material that is excellent in mechanical strength, heat resistance, durability, dimensional accuracy, reliability, etc., and is lightweight and easy to work is preferably used.
  • Such hard resins include polypropylene resin, polyethylene resin, polyvinyl chloride resin, polystyrene resin, acrylonitrile-styrene-acrylate resin, acrylonitrile-butadiene-styrene resin, polyamide resin, polyacetal resin, polycarbonate resin, polyethylene terephthalate resin, polybutylene terephthalate.
  • Thermoplastic resins such as resins, polyphenylene oxide resins, polyphenylene ether resins, polyphenylene sulfide resins, polyurethane resins, liquid crystal polymers, or composite resins thereof can be used.
  • Epoxy resin, urethane resin, or the like can be used as the thermosetting resin. Also, if a hard resin having impact absorption is used, the cushioning effect of the member can be improved.
  • a liquid material, a viscous material, a gel material, or the like that can be deformed at room temperature (25°C) can be used. Since the filling material 15 is a liquid material, a viscous material, a gel material, or the like that can be deformed at room temperature, it is softer and more flexible than a solid material or a foam that is crosslinked and polymerized, and has good conformability to the ear. There is little wearing feeling to attach to ear. In addition, by filling the filler 15, it is easier to cut off external sounds than in the case where the gap is filled with nothing.
  • Examples of the material of the filler 15 include silicone grease, silicone gel, and silicone oil. found. Therefore, we developed a low-hardness gel-like crosslinked polymer that does not exude oil components, and developed a gel-like polymer using a liquid mixture composition containing a liquid diene polymer, a silicone compound having a hydrosilyl group, and a catalyst. It has been found that a crosslinked polymer of The composition of this crosslinked polymer will be described below.
  • a liquid diene-based polymer is a diene-based polymer that is liquid at room temperature.
  • Liquid diene polymers include diene polymers or copolymers composed of butadiene, styrene, isoprene, etc. and their derivatives, and copolymers of diene monomers and ⁇ -olefinic addition polymerizable monomers. Examples include styrene-butadiene copolymers, butadiene polymers, butadiene-isoprene copolymers, butadiene-acrylonitrile copolymers (nitrile rubber), isoprene polymers, styrene-isoprene copolymers, etc., all of which are liquid.
  • the liquid diene-based polymer preferably has a vinyl group in the main chain and/or the side chain for cross-linking, and a repeating unit introduced into a part of the polymer by 1,2-addition polymerization of butadiene. It is more preferable to have a 1,2-vinyl group of
  • the viscosity range of the liquid diene-based polymer at 30°C is preferably 1 to 800 Pa ⁇ s, more preferably 1 to 500 Pa ⁇ s, still more preferably 1 to 350 Pa ⁇ s. On the other hand, if it exceeds 1000 Pa ⁇ s, it is difficult to handle. By using a liquid diene-based polymer having a viscosity within an appropriate range, the obtained filler 15 has a favorable penetration. On the other hand, when it is lower than 1 Pa ⁇ s, a suitable rebound cannot be obtained and the touch is not good, and when it is higher than 800 Pa ⁇ s, the touch is too hard, which is not preferable.
  • the viscosity is in the range of 1 to 500 Pa ⁇ s, the feel is good, and when the viscosity is in the range of 1 to 350 Pa ⁇ s, the feel is even better.
  • the viscosity was measured using a rotational viscometer (BROOKFIELD rotational viscometer, DV-E) by setting the rotational speed of the spindle (SC4-14) to 5 rpm. Values without temperature are measured at 30°C.
  • a silicone having a hydrosilyl group is a silicone having two or more hydrosilyl groups in one molecule at both ends or side chains of the molecular chain, and includes polymethylhydrosiloxane, polyethylhydrosiloxane, and dimethylsiloxane-methylhydrosiloxane copolymer. , methylhydrosiloxane-phenylmethylsiloxane copolymer, diphenylsiloxane-phenylhydrosiloxane copolymer, methylhydrosiloxane-octylmethylsiloxane copolymer, and the like.
  • the catalyst is used for the addition reaction between the liquid diene polymer and the silicone having a hydrosilyl group, and examples of such catalysts include platinum, rhodium, palladium, ruthenium, and other platinum metal catalysts. .
  • platinum-based catalysts it is preferable to use chloroplatinic acid such as hexachloroplatinic acid, alcohol-modified products thereof, and vinylsiloxane complexes of platinum from the viewpoint of speeding up the hydrosilylation reaction.
  • platinum/cyclovinylmethylsiloxane complex platinum/carbonylcyclovinylmethylsiloxane complex, platinum/divinyltetramethyldisiloxane complex, platinum/tetravinylsilane complex, platinum/carbonylvinylmethyl complex platinum/octylaldehyde complex, platinum/octanol complex etc.
  • the gel-like filler 15 obtained by cross-linking and curing the liquid mixture composition containing the liquid diene-based polymer, the silicone compound having the hydrosilyl group, and the catalyst causes the liquid component to bleed to the outside of the container body. I have nothing to do. In addition, since it is gel-like, there is repulsion against pressure, which is different from the state in which deformation is merely caused by pressure.
  • the filler 15 contains a reaction retarder, an antioxidant, and other additives for adjusting the viscosity, sound insulation, vibration damping, etc., within the range that does not impair the deformable property at room temperature. can be added. Alternatively, fine powder such as silica or resin powder (polyethylene, etc.) can be included. Incorporation of such a material makes it difficult for sound to pass through the filling material 15, thereby improving sound insulation and damping properties that prevent noise from being taken in from the outside.
  • the gel-like crosslinked polymer used as the filler 15 preferably has a penetration of 60 or more, more preferably in the range of 100 to 500. If the penetration exceeds 500, the deformability and flexibility become too high, and the inner space 12a containing the filling material 15 has an excessively high resilience, similar to the case where the filling material 15 is hollow. A feeling of wearing increases. In addition, if the container-shaped substrate 13 were to break, it would easily scatter to the outside. On the other hand, if the penetration is less than 100, the deformability and flexibility may be deteriorated, and softness may not be obtained, resulting in poor wearing comfort. Within the preferable range of penetration, the wearing feeling of wearing the ear is suppressed, and the sense of discomfort is reduced. Penetration is a value measured at 25°C based on JISK2207:1996.
  • the earpiece 10a containing the filling material 15 since the earpiece 10a containing the filling material 15 has low resilience, it is easily deformed when inserted into the ear canal, and the shape is maintained during use, and the ear canal is not strongly pressed. However, the feeling of use can be good during long-term use. By filling the filler 15 with respect to the restoring force due to the rubber-like elasticity of the container-shaped substrate 13, generation of the restoring force can be delayed.
  • the 30% compression load of the gel-like crosslinked polymer that is the filler 15 is preferably 90 kPa or less, more preferably 60 kPa or less.
  • it is 90 kPa or less, deformability, flexibility, and resilience are preferable, and when it is 60 kPa or less, these properties become more preferable. If it exceeds 90 kPa, the deformability and flexibility are low, and the tactile sensation deteriorates.
  • the filling material 15 is 50 to 95% by volume, or more than 95% by volume and less than 100% by volume, or 100% by volume of the internal space 12a formed inside the earpiece body 12 and containing the filling material 15. preferably. If the content is less than 50% by volume, it is difficult to obtain the effect of filling the filler 15, as in the case where the internal space 12a is a space. On the other hand, if the amount is more than 100%, the repulsive force when pressed becomes large, resulting in a hard feel and poor softness. By including a considerable amount of bubbles such as air at 50 to 95% by volume, the characteristics of the bubbles can be added.
  • the content is more than 95% by volume and less than 100% by volume
  • air bubbles can enter between the rubber-like elastic membrane and the filler 15, and the properties of both the rubber-like elastic membrane and the filler 15 can be easily reflected. can do.
  • the rubber-like elastic film and the filler 15 can be integrated with each other by eliminating the influence of air bubbles at 100% by volume.
  • the inner or outer surface of the container-like substrate 13 or the lid 14 can be provided with a filler 15 or a low-permeability permeation-preventing film that prevents permeation or permeation of air, or can be surface-treated.
  • a filler 15 or a low-permeability permeation-preventing film that prevents permeation or permeation of air, or can be surface-treated.
  • film formation include film formation using a fluorine-based coating agent, butyl rubber film, and urethane-based material film.
  • surface treatment include known water-repellent finishing and oil-repellent finishing.
  • a method using an adhesive or a pressure-sensitive adhesive, or a method using welding or fusing can be used. Since the fixed portion needs to be flexible even after being fixed, when using an adhesive, it is preferable to use an adhesive that is flexible even after being fixed. Moreover, when using an adhesive or a pressure-sensitive adhesive, it is preferable that these materials are also materials that the filler 15 does not permeate or permeate. In the embodiment in which the container-shaped substrate 13 and the lid body 14, both made of silicone rubber, are fixed with silicone rubber adhesive, liquid leakage does not occur even when the operation of crushing, releasing and returning to the original shape is repeated 5000 times. It is a preferable combination because it can withstand a load test of up to 100 kgf.
  • FIG. 3 is an explanatory diagram of how the container-shaped base 13 and the lid 14 are integrated.
  • the container-shaped substrate 13 and the lid 14 are molded in advance from a rubber-like elastic material into a predetermined shape.
  • hard cylinders 16a and 16b are formed by insert molding of a hard material so that the hard materials forming the hard cylinders 16a and 16b are integrated with the respective inner peripheral walls 13b and 14b.
  • a liquid mixture composition is prepared by mixing a liquid diene-based polymer, a silicone compound having a hydrosilyl group, and a catalyst. do.
  • a material with poor fluidity it is possible to raise the temperature to improve the fluidity.
  • the opening 13a which is the "fixed end" of the container-shaped substrate 13, and the lid 14 are fixed by using an adhesive, a pressure-sensitive adhesive, welding, fusion bonding, or the like.
  • the container-shaped substrate 13 enclosing the filler 15 and the lid 14 are heated to 50 to 200.degree. C., preferably 50 to 150.degree. C., more preferably 80 to 120.degree.
  • the filler 15 bonds the liquid diene-based polymer having a double bond and the silicone having a hydrosilyl group in the liquid mixture composition by a hydrosilylation reaction and is crosslinked and cured.
  • the reaction temperature is lower than 50°C, the reaction time will be long and the production efficiency will be lowered.
  • the reaction temperature is higher than 200° C., autoxidative deterioration tends to occur.
  • a temperature of 50 to 150° C. is more preferable because oxidation deterioration is less likely to occur, and a temperature of 80 to 120° C. is more preferable because oxidation deterioration does not occur while improving production efficiency.
  • the earpiece 10a can be easily manufactured by the above method.
  • the earpiece 10a obtained in this way is flexibly deformable to correspond to the ear canal, can be brought into close contact with the ear, has a good wearing feeling, and is difficult for external sounds to penetrate.
  • the external sound reaching the earpiece 10a is also absorbed by the filler 15, providing good sound insulation.
  • the sound passes through the rigid cylindrical portion 16 whose shape is ensured, making it easy to hear even low frequencies.
  • FIG. 4 shows an earpiece 10b of modification 1-1.
  • the lid-side tubular portion 16b which is a part of the hard tubular portion 16
  • the inner peripheral wall 14b of the lid 14 is shown.
  • Modification 1-1 only the inner peripheral wall 13b of the container-shaped base 13 is provided with the base-side cylindrical portion 16a that serves as the hard cylindrical portion 16.
  • FIG. According to this, it is possible to omit the trouble of integrating the lid-side cylindrical portion 16b at the time of manufacturing the lid 14, and it is possible to suppress the manufacturing cost.
  • the opening 13a of the container-shaped base 13 is wide on the inner peripheral wall 13b side as well. Since the inner peripheral wall 13b side is also wide, the area of the opening 13a can be expanded and the fixing force with the lid body 14 can be increased.
  • FIG. 5 shows an earpiece 10c of modification 1-2.
  • the cover 14 is not positioned on the surface of the hard tubular portion 16 (base-side tubular portion 16a).
  • the end surface of the hard tubular portion 16 is covered with the lid 14, and the lid 14 and the hard tubular portion 16 are fixed together. According to Modification 1-2, the fixing force between the lid 14 and the container-shaped base 13 can be increased.
  • FIG. 6 shows an earpiece 10d of modification 1-3.
  • the earpiece 10d differs from the previous earpieces 10a to 10c in that the rigid tubular portion 16 is not used.
  • the softness of the entire earpiece 10d can be increased.
  • manufacturing is easy because the hard cylindrical portion 16 is not provided.
  • FIG. 7 shows an earpiece 10e of modification 1-4.
  • the earpiece 10e differs from the previous earpieces 10a to 10d in that the hard cylindrical portion 16 is not provided and the through hole 11 is not provided. By not providing the through-hole 11, it can be suitably used for applications such as earplugs.
  • FIG. 8 shows a front view and a cross-sectional view of a cushion body 20a
  • FIG. 9 shows a front view and a cross-sectional view of a cushion body 20b of modification 2-1.
  • the cushion bodies 20a and 20b are collectively referred to as the cushion body 20 as well.
  • the cushion body 20a of the second embodiment is formed of a cushion body 22 composed of a container-shaped base body 23 and a lid body 24, and a filler 25 enclosed in the cushion body 22.
  • the end of the container-shaped base 23 opposite to the lid 24 has a flexible side end 23d that contacts the body.
  • Such a shape is roughly the same as the earpiece 10e shown in FIG. 7, but while the earpiece 10e is large enough to be inserted into the ear, the cushion body 20a is placed on the flexible side end 23d with the lid body 24 placed on the floor. It is a moderate size such as a size that can be lowered. Since the aspect of the present embodiment is a cushion body, the container body composed of the container-shaped base body 23 and the lid body 24 is used as the cushion body 22 .
  • the materials of the container-shaped base body 23 and the lid body 24 in the cushion body 20a and the manufacturing method of the cushion body 20a are the same as the materials and the manufacturing method of the container-shaped base body 13 and the lid body 24 in the earpiece 10a of the first embodiment. .
  • ⁇ Modification 2-1 [Fig. 9]>:
  • the cushion body 20b of modification 2-1 has through holes 21 as shown in FIG.
  • the external shape is generally the same as that of the earpiece 10d of Modified Example 1-3 shown in FIG.
  • the third embodiment is a mode in which the soft tactile body is used as either an earpiece or a cushion body.
  • the soft tactile body described in the embodiments so far has been described as one in which the container-shaped substrate and the lid are integrated. It is characterized in that it consists only of a container-like substrate.
  • FIG. 10 shows a front view, a sectional view and a left side view of the soft tactile body 30. As shown in FIG. As shown in these figures, the soft tactile body 30 has a through hole 31 formed inside a cylindrical shape.
  • the manufacturing method of the soft tactile body 30 does not have a lid, so unlike the soft tactile bodies in the previous embodiments, there is no step of adhering the container-shaped substrate and the lid.
  • the air inside is removed with an injection needle or the like, and then a liquid mixed composition to be the filler 35 is injected and cured.
  • a hole made by an injection needle or the like is closed with an adhesive or the like, or closed with a rubber-like seal.
  • the outer peripheral wall 23c is made of a rubber-like elastic film, and especially if it is made of silicone rubber, the surface feels good on the skin and the inside is filled with a low-hardness gel-like material. Therefore, it has good elasticity to be pushed back and has excellent tactile sensation.
  • the cushion bodies 20a, 20b and the soft tactile body 30 are a face pad attached to goggles, VR goggles, etc., a nose pad, a cushion pad attached to the body contact surface such as a belt, band, strap, etc., and a cushion pad attached to the inner surface of the shoe.
  • Seats, child seats, cushion pads attached to the seat surface, back surface, and head surface of strollers, etc. housing-related or building-related materials such as cushions provided on doorstops and hinges to dampen the sound of door closing, surface decoration, cushioning materials, or sealing around electronic parts such as optical sensors and electrostatic sensors It can be used for a wide variety of purposes such as consumer and industrial use.
  • the cushion bodies 20a and 20b and the soft tactile body 30 used for these applications not only have excellent tactile sensation, but also provide effects such as anti-slipping, cushioning against collisions, and protection.
  • the earpieces shown in the first embodiment and its modifications can be used as cushion bodies with different sizes, and conversely, the cushion bodies shown in the second embodiment and its modifications can be used as cushion bodies with different sizes. You can also use it as an earpiece by changing the .
  • the container body may be a container body in which a container-shaped substrate is closed with a lid, or a container body in which a container-shaped substrate is opened without using a lid depending on the application. This is because the filler is a gel-like cross-linked polymer and therefore does not readily flow out of the container-like substrate.
  • the main body of the container and the filling material can be made transparent or colored by adding a pigment or the like.
  • Samples 1 to 17 were obtained by mixing the materials shown in the following tables as shown in "Composition”.
  • the "composition” shown in the tables indicates parts by mass.
  • the characteristics of each sample described in detail below are shown in the "Properties” column of each table.
  • the liquid mixture composition was cured at 120° C. for 2 hours to obtain gel-like fillers of Samples 1 to 17 having sizes according to the “penetration” and “30% compression load” tests described later. rice field.
  • Sample 1 is liquid polybutadiene (LBR-307, manufactured by Kuraray Co., Ltd.)
  • sample 2 is liquid polybutadiene (LBR-352, manufactured by Kuraray Co., Ltd.)
  • sample 3 is liquid isoprene (LIR-30, manufactured by Kuraray Co., Ltd.)
  • sample 4 is liquid polybutadiene (LBR-307, manufactured by Kuraray Co., Ltd.)
  • sample 5 is liquid isoprene (LIR-50, manufactured by Kuraray Co., Ltd.)
  • sample 5 is liquid polybutadiene (B-1000, manufactured by Nippon Soda Co., Ltd.)
  • sample 6 is liquid polybutadiene (B-2000, manufactured by Nippon Soda Co., Ltd.)
  • sample 7 is liquid polybutadiene (manufactured by Nippon Soda Co., Ltd., B-3000)
  • sample 8 is liquid butadiene (manufactured by Clay Valley Co., Ricon 134)
  • sample 9 is a styrene-butadiene random copolymer (manufactured by Clay Valley Co., Ricon 181)
  • sample 10 is a styrene-butadiene random copolymer (Ricon 184, manufactured by Clay Valley)
  • sample 11 is a styrene-butadiene random copolymer (L-SBR-820, manufactured by Kur
  • Sample 13 is hydrogenated polyisoprene (LIR-290, manufactured by Kuraray Co., Ltd.)
  • sample 14 is a styrene isoprene block polymer (LIR-310, manufactured by Kuraray Co., Ltd.)
  • sample 15 is polyisobutylene (EP- 450A)
  • Sample 16 is a two-liquid mixed curable silicone gel (KE-1052, manufactured by Shin-Etsu Chemical Co., Ltd.)
  • Sample 17 is liquid paraffin (P-260, manufactured by MORESCO).
  • the silicone compound having a hydrosilyl group used in each sample is a hydrogensiloxane compound having an average of 5 hydrosilyl groups in the molecule, and is indicated as "hydrogensiloxane compound" in the table.
  • a platinum catalyst SRX212 manufactured by Dow
  • ethynylcyclohexanol PT88 manufactured by Asahi Kasei Wacker Silicone Co., Ltd.
  • BHT dibutylhydroxytoluene
  • the current of the above circuit is fixed at 1 mA by the constant current source 4, and the resistance change in the load cell 6 accompanying the compression of the test piece 1 and the resistance change in the gauge sensor 7 accompanying the compression of the test piece 1 are data.
  • Each voltage (mV) was read by the logger 5, and the compression load value and compression amount when the test piece 1 was compressed were calculated from these values.
  • each test piece 1 having a thickness of 24 mm was compressed at a speed of 1 mm per minute, and the data logger 5 recorded the values of the load and compression amount over time every 0.5 seconds, and the compression ratio was 30%. was calculated. The measured values are shown in the "30% compression load" column of each table.
  • Oil Bleed The degree of exudation of the liquid component from the earpiece to the outside was evaluated. More specifically, the liquid mixture compositions of Samples 1 to 17 were poured into a silicone rubber container-shaped substrate having a thickness of 1 mm, cured at 120° C. for 2 hours (uncured samples were left as they were), and then cured at room temperature. After leaving for a week, the presence or absence of oil-like gloss on the surface of the container-shaped substrate was visually observed and evaluated, and by observing whether the oil-like gloss could be wiped off with a paper waste, the oil bleeding was confirmed. determined whether or not The presence or absence of oil bleed is shown in the "oil bleed" column of each table.
  • the viscosities of the liquid diene-based polymers were all as low as 500 Pa ⁇ s or less for samples 1 to 12, and those prepared as liquid mixed compositions were able to have viscosities that could be injected into the container body.
  • the viscosity of the liquid diene-based polymer was too high at 1000 Ps ⁇ s or more, and it was difficult to pour into the container main body after forming the liquid mixed composition.
  • the fillers of Samples 1 to 12 all have a penetration of 60 or more, and a 30% compression load of 60 kPa or less. became a thing.
  • the fillers of Samples 13 to 15 had a small penetration of 10 or less, a 30% compressive load of over 90 kPa, and a container-like substrate with low deformability and flexibility.
  • sample 16 is a two-liquid mixed curing type silicone gel, which has a low viscosity and a high penetration of the filler after cross-linking, but has a high affinity for container-shaped substrates made of silicone rubber. Perhaps because of this, the remaining low-molecular-weight silicone component seeped out, causing oil bleeding.
  • sample 17 liquid paraffin was used as a filler in a liquid state, but oil bleed occurred due to exudation from the container-like substrate made of silicone rubber.

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Abstract

The present invention enables the achievement of a soft texture body which has a good touch, while being free from leaching of an oil component. The present invention provides a soft texture body 10a which is obtained by having a filler 15 sealed in a container main body 12, wherein the filler 15 is a gel-like crosslinked polymer of a liquid mixed composition that contains a liquid diene polymer, a silicone compound having a hydrosilyl group, and a catalyst.

Description

軟質触感体soft tactile sensation
　本発明は、人体との接触部材として用いることができる軟質触感体に関する。 The present invention relates to a soft tactile body that can be used as a contact member with the human body.
　軟質触感体は、人体との接触に好適な接触部材として用いられる。例えば、軟質触感体は、イヤホン、耳栓、又は補聴器等の耳穴に入り込む部分となるイヤーピース、又はクッションパッドやクッション等のクッション体として構成することができる。イヤーピースは、装着者の耳穴に挿入される軟質触感体であり、それには様々なタイプが知られている。例えば、特開２００４－２０８８６５号公報（特許文献１）に記載の技術は、取外しが簡単で、防音・防水効果に優れる耳栓を提供することを目的になされた発明である。耳栓の本体は可塑性を有する材質からなり、その本体の全体がプラスチックフィルムで覆われている。また、実用新案登録第３０９６０２４号公報（特許文献２）に記載の技術は、柔軟性があって耳の形状にフィットし易く着用感が良好な聴診器用イヤーチップを提供することを目的になされた考案である。そのイヤーチップの耳挿入部の周壁内部には液体又は空気が注入されているため触感が柔らかい。 A soft tactile body is used as a contact member suitable for contact with the human body. For example, the soft tactile body can be configured as an earpiece, such as an earphone, an earplug, or a hearing aid, which is inserted into the ear canal, or a cushion body such as a cushion pad or cushion. An earpiece is a soft tactile object that is inserted into a wearer's ear canal, and various types are known. For example, the technology described in Japanese Patent Application Laid-Open No. 2004-208865 (Patent Document 1) is an invention aimed at providing earplugs that are easy to remove and have excellent soundproofing and waterproofing effects. The main body of the earplug is made of a material having plasticity and is entirely covered with a plastic film. The technique described in Japanese Utility Model Registration No. 3096024 (Patent Document 2) aims to provide an ear tip for a stethoscope that is flexible, fits easily to the shape of the ear, and is comfortable to wear. It is an idea. Since liquid or air is injected into the inside of the peripheral wall of the ear insert portion of the ear tip, it feels soft to the touch.
　こうしたイヤーピース用の材料は前記特許文献に記載された発明以外にも様々な種類があり、優れた触感を有するものはイヤーピース以外にも、例えばクッションパッドやクッション等のクッション体としても利用される場合がある。 There are various types of materials for such earpieces other than the inventions described in the above-mentioned patent documents, and those having excellent tactile sensation are used not only for earpieces but also for cushion bodies such as cushion pads and cushions. There is
特開２００４－２０８８６５号公報Japanese Patent Application Laid-Open No. 2004-208865 実用新案登録第３０９６０２４号公報Utility Model Registration No. 3096024
　しかしながら、特開２００４－２０８８６５号公報（特許文献１）に記載の技術では、外皮にプラスチックフィルムが用いられている。一般にプラスチックフィルムは屈曲性があるものの伸長変形しない。このため、耳穴内面に密着するように、プラスチックフィルムを変形させることは困難である。そのため、可塑性を有する耳栓の本体の材料をクッション体に利用しようとしても、外皮のプラスチックフィルムによって、その材料の触感の良さが消失してしまう。また、実用新案登録第３０９６０２４号公報（特許文献２）に記載の技術では、耳に挿入する部分の内部に中空形状の空洞部を形成するのが困難であり、この空洞部に液体を注入することも困難である。また、空洞部に液体を封入する場合には、外皮の軟質ゴムの破れによる液漏れが問題になる。空洞部に空気を封入する場合には、耳に挿入する部分の触感は、外皮の軟質ゴムの触感となってしまい、封入した空気による触感が得られない。 However, in the technique described in Japanese Patent Application Laid-Open No. 2004-208865 (Patent Document 1), a plastic film is used for the outer skin. In general, plastic films are flexible, but are not deformed by elongation. Therefore, it is difficult to deform the plastic film so as to adhere to the inner surface of the ear canal. Therefore, even if an attempt is made to use the material of the main body of the earplug, which has plasticity, for the cushion body, the good tactile sensation of the material is lost due to the plastic film of the outer skin. In addition, in the technique described in Japanese Utility Model Registration No. 3096024 (Patent Document 2), it is difficult to form a hollow cavity inside the portion to be inserted into the ear, and liquid is injected into this cavity. is also difficult. Moreover, when a liquid is sealed in the hollow portion, there is a problem of liquid leakage due to breakage of the soft rubber of the outer cover. When air is sealed in the hollow portion, the tactile feel of the portion inserted into the ear becomes the tactile feel of the soft rubber of the outer skin, and the tactile feel of the sealed air cannot be obtained.
　こうした背景から柔軟に変形して触感の良いイヤーピース又はクッション体等の研究を行い、低硬度の充填材をゴム製外皮に封入する軟質触感体を開発した。しかしながら、開発したいくつかの軟質触感体においては、オイル成分が浸み出す不具合が観察された。そこで、本発明者らは、オイル成分の浸み出しのない軟質触感体の開発を課題として検討を続け、本発明の完成に至った。 Against this background, we conducted research on earpieces or cushion bodies that flexibly deform and have a good tactile sensation, and developed a soft tactile body that encloses a low-hardness filler in a rubber outer skin. However, in some of the developed soft tactile materials, it was observed that the oil component seeped out. Therefore, the present inventors have continued to study the development of a soft tactile material free from oozing of the oil component, and have completed the present invention.
　本開示の一態様は、容器本体に充填材が封入された軟質触感体であって、前記充填材が、液状ジエン系重合体と、ヒドロシリル基を持つシリコーン化合物と、触媒と、を含む液状混合組成物のゲル状架橋高分子である。本開示の一態様によれば、ゲル状架橋高分子が、ゴム状弾性膜からなる皮膜の外側にブリードしない。そのため軟質触感体は、経時変化が生じ難い。 One aspect of the present disclosure is a soft tactile body in which a filler is enclosed in a container body, wherein the filler is a liquid mixture containing a liquid diene-based polymer, a silicone compound having a hydrosilyl group, and a catalyst. It is a gel-like crosslinked polymer of the composition. According to one aspect of the present disclosure, the gel-like crosslinked polymer does not bleed to the outside of the coating made of the rubbery elastic membrane. Therefore, the soft tactile body is less likely to change over time.
　本開示の一態様は、前記液状ジエン系重合体が、ポリブタジエン、ポリイソプレン、クロロプレン、又はこれらのブロック若しくはランダム共重合体の何れかの骨格を含む。前記液状ジエン系重合体が、ポリブタジエン、ポリイソプレン、クロロプレン、又はこれらのブロック若しくはランダム共重合体の何れかの骨格を含むため、ヒドロシリル基を持つシリコーン化合物と反応硬化してゲル状の架橋高分子を得ることができる。 In one aspect of the present disclosure, the liquid diene-based polymer includes a skeleton of polybutadiene, polyisoprene, chloroprene, or block or random copolymers thereof. Since the liquid diene-based polymer contains any skeleton of polybutadiene, polyisoprene, chloroprene, or a block or random copolymer thereof, it reacts and cures with a silicone compound having a hydrosilyl group to form a gel-like crosslinked polymer. can be obtained.
　本開示の一態様は、前記液状ジエン系重合体の３０℃における粘度が、１～５００Ｐａ・ｓである。前記液状ジエン重合体の粘度が１～５００Ｐａ・ｓであるため、前記液状混合組成物の粘度も低く抑えることができ、容器本体に注入し易い。そのため軟質触感体の製造が容易である。 In one aspect of the present disclosure, the liquid diene-based polymer has a viscosity at 30°C of 1 to 500 Pa·s. Since the viscosity of the liquid diene polymer is 1 to 500 Pa·s, the viscosity of the liquid mixture composition can be kept low, and it is easy to pour into the container body. Therefore, it is easy to manufacture a soft tactile material.
　本開示の一態様は、前記ヒドロシリル基を持つシリコーン化合物の含有量が、前記液状ジエン系重合体１００質量部に対して０．５～１４質量部である。前記ヒドロシリル基を持つシリコーン化合物の含有量が、前記液状ジエン系重合体１００質量部に対して０．５～１４質量部であるため、触感に優れた軟質触感体とすることができる。 In one aspect of the present disclosure, the content of the silicone compound having a hydrosilyl group is 0.5 to 14 parts by mass with respect to 100 parts by mass of the liquid diene polymer. Since the content of the hydrosilyl group-containing silicone compound is 0.5 to 14 parts by mass with respect to 100 parts by mass of the liquid diene polymer, a soft tactile body with excellent tactile sensation can be obtained.
　本開示の一態様は、前記架橋高分子のＪＩＳＫ２２０７：１９９６に基づく針入度が６０以上である。前記架橋高分子のＪＩＳＫ２２０７：１９９６に基づく針入度が６０以上であるため、この架橋高分子を充填材として含む容器状本体に適度な変形可能性・柔軟性と反発性が生じ触感に優れる。 One aspect of the present disclosure is that the crosslinked polymer has a penetration of 60 or more based on JISK2207:1996. Since the crosslinked polymer has a penetration of 60 or more based on JISK2207:1996, the container-shaped main body containing the crosslinked polymer as a filler has appropriate deformability, flexibility, and resilience, and is excellent in tactile sensation.
　本開示の一態様は、前記容器本体の内部空間に対して前記充填材が５０～１００体積％充填されている。前記充填材が前記容器本体の内部空間に対して５０～１００体積％充填されているため、容器状基体のゴム状弾性膜と充填材の柔軟性の適度なバランスを取ることができて触感に優れている。前記一態様がイヤーピースであれば耳に密着して装着感が良い。前記一態様がクッション体であれば、身体に触れたときでも心地良い。 In one aspect of the present disclosure, the internal space of the container body is filled with the filler by 50 to 100% by volume. Since the filling material fills 50 to 100% by volume of the inner space of the container body, it is possible to maintain an appropriate balance between the flexibility of the rubber-like elastic film of the container-like substrate and the filling material, and the feeling of touch is improved. Are better. If the one mode is an earpiece, it is in close contact with the ear and comfortable to wear. If the one aspect is a cushion body, it is comfortable even when it touches the body.
　本開示の一態様は、前記容器本体は、ゴム状弾性膜からなり一方端に開口部を有する容器状基体と、前記開口部を液密に封止する蓋体と、を有している。そのため容器状本体は、容器状基体と蓋体とを固着することで簡単に製造することができる。また、前記容器状基体がゴム状弾性膜からなり、容器状本体内に封入される充填材が、液状ジエン系重合体とヒドロシリル基を持つシリコーン化合物と触媒とを含む液状混合組成物の架橋高分子であり常温で変形可能である。このため、軟質触感体は触感に優れており、前記一態様がイヤーピースであれば、耳穴の形状に沿って柔軟に変形して耳内に装着させることができ、クッション体とすれば押圧によって柔軟に変形して形状を変形し得る。 In one aspect of the present disclosure, the container body includes a container-shaped base made of a rubber-like elastic film and having an opening at one end, and a lid that liquid-tightly seals the opening. Therefore, the container-like main body can be easily manufactured by fixing the container-like substrate and the lid. Further, the container-shaped substrate is made of a rubber-like elastic film, and the filler enclosed in the container-shaped body is a liquid mixture composition containing a liquid diene-based polymer, a silicone compound having a hydrosilyl group, and a catalyst. It is a molecule and can be deformed at room temperature. For this reason, the soft tactile body is excellent in tactile sensation, and if the above aspect is an earpiece, it can be flexibly deformed along the shape of the ear hole and worn in the ear. It can change shape by transforming into
　本開示の一態様は、前記容器状基体の硬度が、ＪＩＳＫ６２５３－３：２０１２に基づくタイプＡデュロメータを用いた硬度（ＪＩＳ－Ａ硬度）で５～３０である。このようなゴム状弾性膜によれば、外側から押圧した形状に追従変形させ容器状基体をその押圧したものに密着させることができる。そのため、前記一態様がイヤーピースであれば、耳穴内面に沿って容器状基体を密着させることができる。前記一態様がクッション体であれば、身体に沿って容器状基体を密着させることができる。 In one aspect of the present disclosure, the container-shaped substrate has a hardness of 5 to 30 using a type A durometer based on JISK6253-3:2012 (JIS-A hardness). According to such a rubber-like elastic film, the container-like substrate can be brought into close contact with the pressed object by deforming following the shape pressed from the outside. Therefore, if the above aspect is an earpiece, the container-shaped base body can be brought into close contact along the inner surface of the ear canal. If the one aspect is a cushion body, the container-like substrate can be brought into close contact along the body.
　本開示の一態様は、前記容器状基体が中空環状であり、前記蓋体が環状板形状であり、前記容器本体が、前記容器状本体又は前記蓋体の内周部に硬質筒部を有する。前記容器状基体は中空環状であるため、中央部分に貫通孔を備えた軟質触感体とすることができる。そのため、イヤホンとしての用途に好適なイヤーピースとすることができ、また、目の周りに当てるゴーグルとしての用途に好適なクッションパッド等とすることができる。さらに、容器状本体は、中空環状の容器状基体に環状板形状の蓋体を有する構成であるため、少なくとも２ピース構造のシンプルな構成とすることができる。 In one aspect of the present disclosure, the container-shaped substrate is hollow annular, the lid has an annular plate shape, and the container body has a rigid cylindrical portion on the inner peripheral portion of the container-shaped body or the lid. . Since the container-like substrate has a hollow annular shape, it can be a soft tactile body having a through hole in the central portion. Therefore, an earpiece suitable for use as an earphone can be obtained, and a cushion pad or the like suitable for use as goggles applied around the eyes can be obtained. Furthermore, since the container-like main body has a configuration in which the annular plate-shaped lid body is provided on the hollow annular container-like base body, it can have a simple configuration of at least a two-piece structure.
　本開示の一態様は、前記軟質触感体が、イヤーピース又はクッション体の何れかである。前記軟質触感体がイヤーピースであるため、イヤーピースは耳への装着感に優れる。また、前記軟質触感体がクッション体であるため、クッション体は身体に対して心地良い触感を与えることができる。 In one aspect of the present disclosure, the soft tactile body is either an earpiece or a cushion body. Since the soft tactile body is an earpiece, the earpiece is comfortable to wear on the ear. Further, since the soft tactile body is a cushion body, the cushion body can give a comfortable touch to the body.
　本開示の一態様は、容器本体に充填材が封入された軟質触感体の製造方法であって、液状ジエン系重合体と、ヒドロシリル基を持つシリコーン化合物と、触媒と、を含む液状混合組成物を調製し、前記容器本体の内部空間に、前記液状混合組成物を注入、加熱して、当該液状混合組成物を反応硬化させゲル状の前記充填材を得る軟質触感体の製造方法である。この一態様によれば、容器状基体への充填材の注入が、液状混合組成物を注入することで行えるため、製造が容易である。そのため、製造単価を低くすることができ、また歩留まりを良くすることができる。 One aspect of the present disclosure is a method for producing a soft tactile body in which a filler is enclosed in a container body, comprising a liquid mixture composition containing a liquid diene-based polymer, a silicone compound having a hydrosilyl group, and a catalyst. is prepared, and the liquid mixture composition is injected into the inner space of the container body, heated, and the liquid mixture composition is reactively cured to obtain the gel-like filler. According to this aspect, the filling material can be injected into the container-like substrate by injecting the liquid mixture composition, which facilitates production. Therefore, the manufacturing unit cost can be reduced, and the yield can be improved.
　本開示の一態様は、前記加熱により前記液状混合組成物を反応硬化させる温度が５０～２００℃である軟質触感体の製造方法である。前記温度が５０℃よりも低いと、反応時間が長くなり生産効率が低下する。前記温度が２００℃より高いと、自動酸化劣化が生じ易くなる。前記温度が５０～２００℃であることによって、架橋反応を速やかに進めることができ自動酸化劣化を防ぐことができる。 One aspect of the present disclosure is a method for producing a soft tactile body, wherein the temperature at which the liquid mixture composition is reactively cured by heating is 50 to 200°C. If the temperature is lower than 50°C, the reaction time will be long and the production efficiency will be lowered. If the temperature is higher than 200° C., autoxidative deterioration tends to occur. When the temperature is 50 to 200° C., the cross-linking reaction can proceed rapidly and auto-oxidative deterioration can be prevented.
　本開示の一態様は、前記軟質触感体が、イヤーピース又はクッション体の何れかである軟質触感体の製造方法である。前記軟質触感体が、イヤーピース又はクッション体の何れかであるため、イヤーピース又はクッションを容易に製造することができる。 One aspect of the present disclosure is a method for manufacturing a soft tactile body, wherein the soft tactile body is either an earpiece or a cushion body. Since the soft tactile body is either an earpiece or a cushion body, the earpiece or the cushion can be easily manufactured.
　本開示の一態様によれば、触感に優れた軟質触感体を実現できる。
　また、本開示の一態様によれば、触感に優れた軟質触感体を容易に製造できる。 According to one aspect of the present disclosure, a soft tactile body with excellent tactile sensation can be realized.
Moreover, according to one aspect of the present disclosure, a soft tactile body having excellent tactile sensation can be easily manufactured.
第１実施形態であるイヤーピースであり分図１Ａは底面図、分図１Ｂは正面図である。1A is a bottom view and FIG. 1B is a front view of the earpiece of the first embodiment. 図１ＡのII－II線断面図である。FIG. 1B is a sectional view taken along line II-II of FIG. 1A; 図１のイヤーピースの製造方法を説明する説明図である。FIG. 2 is an explanatory diagram illustrating a method of manufacturing the earpiece of FIG. 1; 変形例１のイヤーピースの図２相当断面図である。FIG. 2 is a cross-sectional view of the earpiece of Modification 1, corresponding to FIG. 変形例２のイヤーピースの図２相当断面図である。FIG. 2 is a cross-sectional view of the earpiece of Modification 2, corresponding to FIG. 変形例３のイヤーピースの図２相当断面図である。2 equivalent cross-sectional view of the earpiece of Modified Example 3. FIG. 変形例４のイヤーピースの図２相当断面図である。2 equivalent cross-sectional view of the earpiece of Modification 4. FIG. 第２実施形態であるクッション体であり分図８Ａは正面図、分図８Ｂは図１の分図１Ｂに相当する断面図である。8A is a front view, and FIG. 8B is a cross-sectional view corresponding to FIG. 1B of FIG. 1, showing the cushion body of the second embodiment. 変形例１のクッション体の図８相当図である。8 equivalent view of the cushion body of Modification 1. FIG. 変形例２のクッション体であり分図１０Ａは正面図、分図１０Ｂは図１の分図１Ｂに相当する断面図、分図１０Ｃは左側面図である。Fig. 10A is a front view, Fig. 10B is a sectional view corresponding to Fig. 1B of Fig. 1, and Fig. 10C is a left side view of the cushion body of Modification 2. Figs. 荷重試験機の模式図である。It is a schematic diagram of a load tester.
　本開示の一態様を具体的に説明する。しかしながら、その説明は、本開示の範囲を限定することを意図するものではなく、例示的な実施形態を説明する記載として理解すべきものである。以下の説明は、特許請求の範囲を不当に限定するものではなく、本実施形態で説明される構成の全てが解決手段として必須であるとは限らない。 One aspect of the present disclosure will be specifically described. However, the description is not intended to limit the scope of the present disclosure, but should be understood as a description of exemplary embodiments. The following description does not unduly limit the scope of the claims, and not all of the configurations described in the present embodiment are essential as solutions.
　以下の説明で上、下、左、右、前、後の方向を示す用語は、説明の便宜のために使用するものであり、使用方法、使用態様を示すものではない。本明細書及び特許請求の範囲に記載する「第１」と「第１」に続く「第ｎ」などの用語は、異なる要素を区別するための識別用語として使用するものであり、特定の順序や優劣などを示すものではない。 In the following explanation, the terms indicating the directions of up, down, left, right, front, and back are used for convenience of explanation, and do not indicate the method of use or mode of use. Terms such as “first” and “nth” following “first” described herein and in the claims are used as identification terms to distinguish different elements, and are used in a specific order. It does not indicate superiority or inferiority.
　以下の説明で使用される用語は、特定の実施形態を説明することのみを目的とし、本開示の範囲を限定することを意図するものではない。本明細書及び特許請求の範囲に記載する一態様による構成要素は、単数形又は複数形であることを文脈上明確に記載しない限り、複数形も含むことが意図される。用語「及び／又は」は、関連する列挙された要素のうちの１つ以上のいずれか及び全ての考えられる組み合わせを指し、かつこれを含むことが意図される。本明細書及び特許請求の範囲に記載する用語「含む（includes）」、「含む（including）」、「含む、備える（comprises）」、及び／又は「含む、備える（comprising）」は、特徴、動作、要素、ステップの存在を特定するものである。しかしながら、１つ以上の他の特徴、動作、要素、ステップ及び／又はそれらのグループの存在又は追加を除外するものではない用語として用いられている。 The terms used in the following description are for the purpose of describing specific embodiments only and are not intended to limit the scope of the present disclosure. Elements according to one aspect described in this specification and claims are intended to include the plural forms as well, unless the context clearly dictates otherwise. The term "and/or" refers to and is intended to include any and all possible combinations of one or more of the associated listed elements. The terms “includes,” “including,” “comprises,” and/or “comprising” as used herein and in the claims refer to the features, It specifies the existence of an action, element or step. However, the term is used without excluding the presence or addition of one or more other features, acts, elements, steps and/or groups thereof.
　各実施形態で共通する材質、作用、効果等については重複説明を省略する。また各図は説明の便宜のため構成部分の大きさや比率、表面形状等を模式的に表示している。 Duplicate descriptions of materials, actions, effects, etc. common to each embodiment will be omitted. Each figure schematically shows the size, ratio, surface shape, etc. of the component parts for convenience of explanation.
　＜第１実施形態［図１～図３］＞：
　第１実施形態は、本開示の一態様であるイヤーピースである。図１はイヤーピース１０ａの底面図と正面図、図２は断面図である。イヤーピース１０ａは、イヤーピース本体１２と充填材１５とを備える。イヤーピース本体１２は、容器状基体１３と蓋体１４とを備える。充填材１５は、イヤーピース本体１２の中に封入される。容器状基体１３の「内周部」となる内周壁１３ｂには硬質筒部１６を備える。なお、本実施形態はイヤーピースであるので、容器状基体１３と蓋体１４とからなる容器本体をイヤーピース本体１２としている。 <First embodiment [Figs. 1 to 3]>:
The first embodiment is an earpiece that is one aspect of the present disclosure. FIG. 1 is a bottom view and a front view of an earpiece 10a, and FIG. 2 is a sectional view. The earpiece 10 a includes an earpiece body 12 and a filler 15 . The earpiece main body 12 includes a container-shaped base body 13 and a lid body 14 . A filler material 15 is enclosed within the earpiece body 12 . The inner peripheral wall 13b, which serves as the “inner peripheral portion” of the container-shaped substrate 13, is provided with a hard cylindrical portion 16. As shown in FIG. Since the present embodiment is an earpiece, the earpiece main body 12 is the container main body composed of the container-shaped base 13 and the lid 14 .
　容器状基体１３は、容器形状のゴム状弾性膜からなる。具体的には、容器状基体１３は開口部１３ａを有する中空の容器状であるゴム状弾性膜からなる。環状の開口部１３ａには後述する環状の蓋体１４が固着する。蓋体１４が開口部１３ａを密封することで、イヤーピース本体１２を形成する。イヤーピース本体１２は、イヤーピース１０ａの中央に貫通孔１１が形成されるように、図１Ａの平面視で中央に穴の開いた環状である。より具体的なその形状は円環状である。また図１Ｂの正面視では、蓋体１４側は角を有する長方形状であるのに対し、蓋体１４と反対側は丸みのある形状（湾曲形状）としている。 The container-shaped substrate 13 is made of a container-shaped rubber-like elastic film. Specifically, the container-like substrate 13 is made of a hollow container-like rubber-like elastic membrane having an opening 13a. An annular cover 14, which will be described later, is fixed to the annular opening 13a. The earpiece main body 12 is formed by sealing the opening 13a with the cover 14 . The earpiece main body 12 has an annular shape with a hole in the center when viewed from above in FIG. 1A so that the through hole 11 is formed in the center of the earpiece 10a. A more specific shape thereof is an annular shape. Further, in the front view of FIG. 1B, the lid 14 side has a rectangular shape with corners, whereas the side opposite to the lid 14 has a rounded shape (curved shape).
　容器状基体１３における蓋体１４と反対側の端部は、耳介に挿入する耳介挿入側端部１３ｄを有する。耳介挿入側端部１３ｄは、容器状基体１３の外周壁１３ｃから先端にかけて湾曲形状の外周側湾曲部１３ｄ１を有する。また、耳介挿入側端部１３ｄは、容器状基体１３の内周壁１３ｂから先端にかけて湾曲形状の内周側湾曲部１３ｄ２を有する。外周側湾曲部１３ｄ１を有するため、耳穴に挿入し易いようすることができる。また、内周側湾曲部１３ｄ２によって貫通孔１１の出口側がラッパ状に広がるため、貫通孔１１を通る音が耳内に広がり易くなるようにしている。また、耳介挿入側端部１３ｄの先端側に外周側湾曲部１３ｄ１と内周側湾曲部１３ｄ２とを有することで、イヤーピース１０ａの製造時においても、充填材１５を注入する際に気泡が入り難くなるというメリットもある。なお、容器状基体１３の蓋体１４とは反対側の形状は、図２で示した形状の他、円形断面のチューブのような全体的に丸みのある形状、くびれを有する蛇腹状、あるいは先端側に向かって細くなる形状などとすることもできる。 The end of the container-shaped base 13 opposite to the lid 14 has an auricle insertion side end 13d to be inserted into the auricle. The auricle insertion side end portion 13d has an outer curved portion 13d1 curved from the outer peripheral wall 13c of the container-shaped base 13 to the tip. The auricle insertion side end portion 13d has an inner peripheral side curved portion 13d2 that is curved from the inner peripheral wall 13b of the container-shaped base 13 to the tip. Since it has the outer curved portion 13d1, it can be easily inserted into the ear canal. In addition, since the outlet side of the through-hole 11 spreads like a trumpet due to the inner curved portion 13d2, the sound passing through the through-hole 11 easily spreads into the ear. In addition, since the outer curved portion 13d1 and the inner curved portion 13d2 are provided on the tip side of the auricle-insertion-side end portion 13d, air bubbles may enter when the filler 15 is injected even when the earpiece 10a is manufactured. It also has the advantage of being difficult. In addition to the shape shown in FIG. 2, the shape of the container-shaped substrate 13 on the side opposite to the lid 14 may be an overall rounded shape such as a tube with a circular cross section, a bellows shape having a constriction, or a tip end. It can also have a shape that tapers toward the side.
　蓋体１４との「固着端部」、固着面となる開口部１３ａは、平板状の蓋体１４との接着が容易となるように、凹凸の無い単一の平面（平坦面）として形成されることが好ましい。他方、容器状基体１３の内周壁１３ｂの開口部１３ａと外周壁１３ｃの開口部１３ａとは、異なる高さの面として形成することも可能である。また、容器状基体１３を形成するゴム状弾性膜は、その垂直断面の面積が小さいため、その断面をそのまま開口部１３ａとしたのでは蓋体１４との接着面積が小さくなり固着力が乏しくなる。そのため、ゴム状弾性膜の厚みを開口部１３ａに向けて徐々に厚くし、開口部１３ａにおける蓋体１４の半径方向に沿う長さ（図３における長さｔ１）が、容器状基体１３を形成するゴム状弾性膜の平均的な厚み部分における断面の当該長さよりも長くしている。即ち、蓋体１４の半径方向に沿う長さｔ１は、容器状基体１３の外周壁１３ｃの中間部分の長さ（図３における長さｔ２）よりも長くしている。イヤーピース１０ａの内周壁１３ｂの上端側は、広幅としていない。しかしながら内周壁１３ｂの上端側の開口部１３ａも、外周壁１３ｃの上端側の開口部１３ａと同様に広幅とすると、蓋体１４との固着面積が広くなり固着力を高めることができる点で好ましい。 The opening 13a, which serves as the "fixed end" to the lid 14 and the fixing surface, is formed as a single plane (flat surface) without irregularities so that it can be easily adhered to the flat plate-shaped lid 14. preferably. On the other hand, the opening 13a of the inner peripheral wall 13b and the opening 13a of the outer peripheral wall 13c of the container-shaped substrate 13 can be formed as planes of different heights. Further, since the rubber-like elastic film forming the container-shaped substrate 13 has a small vertical cross-sectional area, if the cross-section is used as the opening 13a as it is, the adhesive area with the lid 14 becomes small and the fixing force becomes poor. . Therefore, the thickness of the rubber-like elastic film is gradually increased toward the opening 13a, and the length (length t1 in FIG. 3) along the radial direction of the lid 14 at the opening 13a forms the container-like substrate 13. It is longer than the relevant length of the cross section at the average thickness portion of the rubber-like elastic membrane. That is, the length t1 along the radial direction of the lid 14 is longer than the length of the intermediate portion of the outer peripheral wall 13c of the container-shaped base 13 (length t2 in FIG. 3). The upper end side of the inner peripheral wall 13b of the earpiece 10a is not wide. However, if the opening 13a on the upper end side of the inner peripheral wall 13b is also wide like the opening 13a on the upper end side of the outer peripheral wall 13c, it is preferable in that the fixing area with the lid body 14 is widened and the fixing force can be increased. .
　容器状基体１３は、伸縮して自在に変形させることが可能であって、柔軟性と伸縮性が高いことが好ましい。そのため容器状基体１３はゴム状弾性膜で形成される。容器状基体１３を形成するゴム状弾性体としては、熱可塑性エラストマーや熱硬化性ゴムなどのゴム状弾性体を用いることができる。例えば、熱可塑性エラストマーとしては、スチレン系エラストマー、オレフィン系エラストマー、ポリエステル系エラストマー、ウレタン系エラストマー、ポリアミド系エラストマーなどが挙げられる。熱硬化性ゴムとしては、スチレンゴム、ブタジエンゴム、イソプレンゴム、ニトリルゴム、ブチルゴム、クロロプレンゴム、エチレンプロピレンゴム、シリコーンゴム、アクリルゴム、ウレタンゴム、フッ素ゴムなどが挙げられる。封入されている充填材１５に対して膨潤や浸透が少なく、さらに空気に対してガス透過性の小さい材料が好ましい。また、シリコーンゴムは、圧縮や引張に対する永久歪みが小さく、非粘着性であり表面触感が良い。また低硬度及び低歪み性とすることが可能である点で好ましい。 The container-shaped substrate 13 can be stretched and deformed freely, and preferably has high flexibility and stretchability. Therefore, the container-like substrate 13 is formed of a rubber-like elastic film. As the rubber-like elastic body forming the container-shaped substrate 13, a rubber-like elastic body such as thermoplastic elastomer or thermosetting rubber can be used. Examples of thermoplastic elastomers include styrene-based elastomers, olefin-based elastomers, polyester-based elastomers, urethane-based elastomers, and polyamide-based elastomers. Examples of thermosetting rubber include styrene rubber, butadiene rubber, isoprene rubber, nitrile rubber, butyl rubber, chloroprene rubber, ethylene propylene rubber, silicone rubber, acrylic rubber, urethane rubber, and fluororubber. A material that swells and permeates little with respect to the enclosed filler 15 and has low gas permeability to air is preferable. In addition, silicone rubber has a small permanent set against compression and tension, is non-adhesive, and has a good surface texture. Moreover, it is preferable in that it is possible to have low hardness and low distortion.
　容器状基体１３を形成するゴム状弾性体の硬度は、ＪＩＳ－Ａ硬度５～３０程度の低硬度範囲が好ましく、１０～２０がより好ましい。また伸びは２００％以上あることが好ましい。硬度がＡ硬度５よりも低いと、ゴム状弾性膜の強度が弱くなり破れ易くなるおそれがある。硬度がＡ硬度３０よりも高いと、ゴム状弾性膜の柔らかな感触が得られ難いおそれがある。ゴム状弾性体の伸びは２００％より少ないと、イヤーピース１０ａを変形させた際に破損し易くなる可能性が高まる。なお、ＪＩＳ－Ａ硬度とは、ＪＩＳＫ６２５３－３：２０１２に基づくタイプＡデュロメータを用いた測定値である。伸びはＪＩＳＫ６２５１：２０１７に基づく測定値（切断時伸び）である。 The hardness of the rubber-like elastic body forming the container-shaped substrate 13 is preferably in a low hardness range of JIS-A hardness of about 5 to 30, more preferably 10 to 20. Further, it is preferable that the elongation is 200% or more. If the hardness is lower than A hardness of 5, the strength of the rubber-like elastic film may be weakened and easily broken. If the hardness is higher than A hardness 30, it may be difficult to obtain the soft feel of the rubber-like elastic film. If the elongation of the rubber-like elastic body is less than 200%, the possibility that the earpiece 10a will be easily damaged when the earpiece 10a is deformed increases. The JIS-A hardness is a value measured using a type A durometer based on JISK6253-3:2012. Elongation is a measured value (elongation at break) based on JISK6251:2017.
　容器状基体１３のゴム状弾性膜の厚さは０．１ｍｍ～２ｍｍの範囲が好ましい。０．１ｍｍよりも薄いと破断し易くなるからであり、２ｍｍよりも厚いと内側に充填する充填材１５の性質が外部に伝わり難くなるからである。 The thickness of the rubber-like elastic film of the container-shaped substrate 13 is preferably in the range of 0.1 mm to 2 mm. This is because if the thickness is less than 0.1 mm, it is likely to break, and if the thickness is greater than 2 mm, the properties of the filling material 15 filled inside are difficult to transmit to the outside.
　蓋体１４は、容器状基体１３の開口部１３ａを閉塞して充填材１５を封入する部材である。蓋体１４は、製造上の容易性の観点から板状に形成することが好ましい。本実施形態では、蓋体１４は、容器状基体１３の内周壁１３ｂに対応する穴１４ａの開いた環状板として形成されている。より具体的なその形状は円環状である。あるいは、容器状基体１３の内周壁１３ｂの開口部と外周壁１３ｃの開口部とを、相互に高さの異なる面として構成する場合には、蓋体１４は、それに合わせて蓋体の中央側と外周側とを、相互に高さの異なる板面に構成することもできる。 The lid 14 is a member that closes the opening 13 a of the container-shaped base 13 and encloses the filler 15 . The lid 14 is preferably formed in a plate shape from the viewpoint of ease of manufacture. In this embodiment, the lid 14 is formed as an annular plate having a hole 14a corresponding to the inner peripheral wall 13b of the container-shaped base 13. As shown in FIG. A more specific shape thereof is an annular shape. Alternatively, when the opening of the inner peripheral wall 13b and the opening of the outer peripheral wall 13c of the container-shaped base body 13 are configured as surfaces having different heights, the lid body 14 is arranged on the central side of the lid body accordingly. and the outer peripheral side may be formed on plate surfaces having different heights.
　蓋体１４を形成する材料は、容器状基体１３と同様の材料を用いることができる。「同様の材料」とは、容器状基体１３と蓋体１４がともに同じ材料（例えばシリコーンゴム）である場合及び同種の材料である場合を含む。ここで「同種の材料」とは、容器状基体１３がある種のシリコーンゴムであり、蓋体１４が別種のシリコーンゴムである場合、容器状基体１３がシリコーンゴムであり、蓋体１４がブチルゴムである場合を例示することができる。蓋体１４と容器状基体１３とが同様の材料であれば、容器状基体１３と蓋体１４の双方に接着し易い接着剤を容易に選択できる点で好ましい。また、イヤーピース１０ａが、全体として同様の触感を得られる点でも好ましい。 A material similar to that of the container-shaped base 13 can be used as the material forming the lid 14 . The term "similar material" includes the case where both the container-shaped base 13 and the lid body 14 are made of the same material (for example, silicone rubber) and the case where they are made of the same kind of material. Here, "the same kind of material" means that when the container-shaped substrate 13 is made of one kind of silicone rubber and the lid 14 is made of another kind of silicone rubber, the container-shaped substrate 13 is made of silicone rubber and the lid 14 is made of butyl rubber. A case can be exemplified. If the lid body 14 and the container-shaped base body 13 are made of the same material, it is preferable in that an adhesive that easily adheres to both the container-shaped base body 13 and the lid body 14 can be easily selected. It is also preferable in that the earpiece 10a as a whole can provide the same tactile sensation.
　蓋体１４には、容器状基体１３とは別種の材料を用いることもできる。例えば、容器状基体１３がゴム状弾性膜であるのに対して、蓋体１４が樹脂フィルムや樹脂板である場合である。樹脂フィルムを用いれば低荷重であり耳にかかる負担が少ない点や、製造コストを抑制できる点で好ましい。 A material different from that of the container-shaped base 13 can be used for the lid 14 . For example, the container-like substrate 13 is a rubber-like elastic film, while the lid 14 is a resin film or resin plate. The use of a resin film is preferable in that the load is low, the burden on the ears is small, and the manufacturing cost can be suppressed.
　硬質筒部１６は、容器状基体１３または蓋体１４の内周に固着された硬質材からなる円筒状部分である。容器状基体１３と異なり容器状基体１３よりも硬質材料で形成されることで、容器状基体１３の過度な変形を防止し、音の通る貫通孔１１を確保し、さらには硬質材料で形成することで音の吸収を抑制して耳内への音の伝達を効率良くすることができる。 The hard cylindrical portion 16 is a cylindrical portion made of a hard material that is fixed to the inner periphery of the container-shaped base 13 or the lid 14 . Unlike the container-like substrate 13, the container-like substrate 13 is made of a harder material than the container-like substrate 13, thereby preventing excessive deformation of the container-like substrate 13, securing the through holes 11 through which sound passes, and furthermore, being made of a hard material. By doing so, it is possible to suppress sound absorption and efficiently transmit sound into the ear.
　硬質筒部１６の蓋体１４とは反対側の端部は、容器状基体１３の先端よりは内側に位置するように配置されて、硬質筒部１６が耳に当たることを防止し、また、容器状基体１３の先端が自由に変形するようにしている。一方、硬質筒部１６の蓋体１４側の端部は、蓋体１４の内周壁１４ｂにまで及ぶとともに、硬質筒部１６の端部が蓋体１４の表面と面一になるように形成されている。本実施形態では、硬質筒部１６が蓋体１４の内周壁１４ｂにまで設けられているため、容器状基体１３の内周壁１３ｂ側の開口部１３ａは、その厚みを厚くしなくても良い。これによれば、容器状基体１３側に設けた硬質筒部１６と蓋体１４側に設けた硬質筒部１６との固着による固着力が高くなり、容器状基体１３の内周壁１３ｂと蓋体１４との固着力の弱さを補うことができるからである。したがって、容器状基体１３に開口を広くとることができ、製造過程において容器状基体１３への充填材１５の注入が容易である。 The end of the hard cylindrical portion 16 on the side opposite to the lid 14 is positioned inside the tip of the container-shaped base 13 to prevent the hard cylindrical portion 16 from hitting the ear and also The tip of the shaped substrate 13 is freely deformable. On the other hand, the end of the hard cylindrical portion 16 on the side of the lid 14 extends to the inner peripheral wall 14 b of the lid 14 and is formed so that the end of the hard cylindrical portion 16 is flush with the surface of the lid 14 . ing. In this embodiment, since the hard cylindrical portion 16 is provided up to the inner peripheral wall 14b of the lid 14, the opening 13a of the container-shaped base 13 on the inner peripheral wall 13b side does not need to be thick. According to this, the fixing force between the rigid cylindrical portion 16 provided on the container-shaped base 13 side and the rigid cylindrical portion 16 provided on the lid 14 side is increased, and the inner peripheral wall 13b of the container-shaped base 13 and the lid are increased. This is because it is possible to compensate for the weak adhesive force with 14 . Therefore, a wide opening can be provided in the container-like substrate 13, and the filling material 15 can be easily injected into the container-like substrate 13 during the manufacturing process.
　硬質筒部１６は内周壁１３ｂが型崩れしないようにして容器状基体１３の開口を広く保持する機能を有している。この点でも容器状基体１３は、充填材１５の注入が容易になるように工夫されている。また、硬質筒部１６の蓋体１４側の端部は、蓋体１４に対して固着するため「固着端部」として機能している。蓋体１４は、硬質筒部１６の蓋体側端部と容器状基体１３の開口部１３ａとを連続して封止するため、容器状基体１３に対して固着することができ、液漏れをより確実に防止することができる。 The hard cylindrical portion 16 has the function of keeping the opening of the container-shaped base 13 wide so that the inner peripheral wall 13b does not lose its shape. In this respect as well, the container-shaped substrate 13 is devised so that the filling material 15 can be easily injected. In addition, the end portion of the rigid cylindrical portion 16 on the lid body 14 side is fixed to the lid body 14 and functions as a "fixed end portion". Since the lid body 14 continuously seals the lid-side end of the hard tubular portion 16 and the opening 13a of the container-shaped substrate 13, the lid 14 can be fixed to the container-shaped substrate 13, thereby preventing liquid leakage. can be reliably prevented.
　硬質筒部１６は、その材質として硬質樹脂を用いることができ、機械的強度、耐熱性、耐久性、寸法精度、信頼性等に優れ、軽量で加工性が良い材質が好適に用いられる。こうした硬質樹脂には、ポリプロピレン樹脂、ポリエチレン樹脂、ポリ塩化ビニル樹脂、ポリスチレン樹脂、アクリロニトリル・スチレン・アクリレート樹脂、アクリロニトリル・ブタジエン・スチレン樹脂、ポリアミド樹脂、ポリアセタール樹脂、ポリカーボネート樹脂、ポリエチレンテレフタレート樹脂、ポリブチレンテレフタレート樹脂、ポリフェニレンオキサイド樹脂、ポリフェニレンエーテル樹脂、ポリフェニレンサルファイド樹脂、ポリウレタン樹脂、液晶ポリマー等の熱可塑性樹脂、あるいはこれらの複合樹脂を使用できる。また、熱硬化性樹脂としてはエポキシ樹脂、ウレタン樹脂等を使用できる。また衝撃吸収性を有する硬質樹脂を用いるとその部材による緩衝作用を向上できる。 A hard resin can be used as the material for the hard tubular portion 16, and a material that is excellent in mechanical strength, heat resistance, durability, dimensional accuracy, reliability, etc., and is lightweight and easy to work is preferably used. Such hard resins include polypropylene resin, polyethylene resin, polyvinyl chloride resin, polystyrene resin, acrylonitrile-styrene-acrylate resin, acrylonitrile-butadiene-styrene resin, polyamide resin, polyacetal resin, polycarbonate resin, polyethylene terephthalate resin, polybutylene terephthalate. Thermoplastic resins such as resins, polyphenylene oxide resins, polyphenylene ether resins, polyphenylene sulfide resins, polyurethane resins, liquid crystal polymers, or composite resins thereof can be used. Epoxy resin, urethane resin, or the like can be used as the thermosetting resin. Also, if a hard resin having impact absorption is used, the cushioning effect of the member can be improved.
　充填材１５は、常温（２５℃）で変形可能な液状体や粘性体、ゲル状物等を用いることができる。充填材１５が常温で変形可能な液状体や粘性体、ゲル状物等であるため、架橋され高分子化したソリッド状物や発泡体よりも柔らかく柔軟性があり耳への追従性が良く、耳につけているという装着感が少ない。また、充填材１５を充填することで何も充填しない空隙とする場合よりも外部音を遮断し易い。 For the filler 15, a liquid material, a viscous material, a gel material, or the like that can be deformed at room temperature (25°C) can be used. Since the filling material 15 is a liquid material, a viscous material, a gel material, or the like that can be deformed at room temperature, it is softer and more flexible than a solid material or a foam that is crosslinked and polymerized, and has good conformability to the ear. There is little wearing feeling to attach to ear. In addition, by filling the filler 15, it is easier to cut off external sounds than in the case where the gap is filled with nothing.
　こうした充填材１５の材質としては、例えば、シリコーングリス、シリコーンゲル、又はシリコーンオイル等が挙げられるが、これらの充填材１５をイヤーピース本体に封入すると、充填材１５のオイル成分が浸み出す不具合が見つかった。そこで、オイル成分の滲み出しのない低硬度でゲル状の架橋高分子の開発を行い、液状ジエン系重合体と、ヒドロシリル基を持つシリコーン化合物と、触媒と、を含む液状混合組成物によるゲル状の架橋高分子が好ましいことを見出した。以下、この架橋高分子の組成について説明する。 Examples of the material of the filler 15 include silicone grease, silicone gel, and silicone oil. found. Therefore, we developed a low-hardness gel-like crosslinked polymer that does not exude oil components, and developed a gel-like polymer using a liquid mixture composition containing a liquid diene polymer, a silicone compound having a hydrosilyl group, and a catalyst. It has been found that a crosslinked polymer of The composition of this crosslinked polymer will be described below.
　液状ジエン系重合体は、ジエン系重合体の中でも常温で液状のものをいう。液状ジエン系重合体としては、ブタジエン、スチレン、イソプレン等及びこれらの誘導体からなるジエン重合体又は共重合体、さらにはジエンモノマーとα－オレフィン性付加重合性モノマーとの共重合体であり、以下何れも液状のスチレンブタジエン共重合体、ブタジエン重合体、ブタジエンイソプレン共重合体、ブタジエンアクリロニトリル共重合体（ニトリルゴム）、イソプレン重合体、スチレンイソプレン共重合体等が挙げられる。これらの重合体は、単独でも２種以上を組み合わせて用いても良い。液状ジエン系重合体は、架橋させるために主鎖および／または側鎖にビニル基を有していることが好ましく、ブタジエンの１，２－付加重合により重合体の一部に導入される繰り返し単位の１，２－ビニル基を有することがより好ましい。 A liquid diene-based polymer is a diene-based polymer that is liquid at room temperature. Liquid diene polymers include diene polymers or copolymers composed of butadiene, styrene, isoprene, etc. and their derivatives, and copolymers of diene monomers and α-olefinic addition polymerizable monomers. Examples include styrene-butadiene copolymers, butadiene polymers, butadiene-isoprene copolymers, butadiene-acrylonitrile copolymers (nitrile rubber), isoprene polymers, styrene-isoprene copolymers, etc., all of which are liquid. These polymers may be used alone or in combination of two or more. The liquid diene-based polymer preferably has a vinyl group in the main chain and/or the side chain for cross-linking, and a repeating unit introduced into a part of the polymer by 1,2-addition polymerization of butadiene. It is more preferable to have a 1,2-vinyl group of
　液状ジエン系重合体の３０℃における粘度の範囲は、好ましくは１～８００Ｐａ・ｓであり、より好ましくは１～５００Ｐａ・ｓであり、さらに好ましくは１～３５０Ｐａ・ｓである。そうした一方で、１０００Ｐａ・ｓを超えると取り扱いが困難である。適度な範囲の粘度にある液状ジエン系重合体を用いることで、得られる充填材１５の針入度も好ましいものとなる。一方、１Ｐａ・ｓよりも低いと適当な反発が得られず触感が良くなく、８００Ｐａ・ｓよりも高いと、触感が硬すぎて好ましくない。前記粘度の範囲が１～５００Ｐａ・ｓであれば触感が良く、１～３５０Ｐａ・ｓであればより触感が良い。粘度は、回転粘度計（ＢＲＯＯＫＦＩＥＬＤ製回転粘度計、ＤＶ－Ｅ）を用いて、スピンドル（ＳＣ４－１４）の回転速度を５ｒｐｍに設定して測定した。温度の記載ないものは３０℃における測定値である。 The viscosity range of the liquid diene-based polymer at 30°C is preferably 1 to 800 Pa·s, more preferably 1 to 500 Pa·s, still more preferably 1 to 350 Pa·s. On the other hand, if it exceeds 1000 Pa·s, it is difficult to handle. By using a liquid diene-based polymer having a viscosity within an appropriate range, the obtained filler 15 has a favorable penetration. On the other hand, when it is lower than 1 Pa·s, a suitable rebound cannot be obtained and the touch is not good, and when it is higher than 800 Pa·s, the touch is too hard, which is not preferable. When the viscosity is in the range of 1 to 500 Pa·s, the feel is good, and when the viscosity is in the range of 1 to 350 Pa·s, the feel is even better. The viscosity was measured using a rotational viscometer (BROOKFIELD rotational viscometer, DV-E) by setting the rotational speed of the spindle (SC4-14) to 5 rpm. Values without temperature are measured at 30°C.
　ヒドロシリル基を有するシリコーンは、１分子中に２以上のヒドロシリル基を分子鎖の両末端や側鎖に有するシリコーンであり、ポリメチルヒドロシロキサン、ポリエチルヒドロシロキサン、ジメチルシロキサン－メチルヒドロシロキサン共重合体、メチルヒドロシロキサン－フェニルメチルシロキサン共重合体、ジフェニルシロキサン－フェニルヒドロシロキサン共重合体、メチルヒドロシロキサン－オクチルメチルシロキサン共重合体等が挙げられる。 A silicone having a hydrosilyl group is a silicone having two or more hydrosilyl groups in one molecule at both ends or side chains of the molecular chain, and includes polymethylhydrosiloxane, polyethylhydrosiloxane, and dimethylsiloxane-methylhydrosiloxane copolymer. , methylhydrosiloxane-phenylmethylsiloxane copolymer, diphenylsiloxane-phenylhydrosiloxane copolymer, methylhydrosiloxane-octylmethylsiloxane copolymer, and the like.
　触媒は、液状ジエン系重合体とヒドロシリル基を有するシリコーンとを付加反応させるために用いられるものであり、こうした触媒には、白金、ロジウム、パラジウム、ルテニウム等の白金属系触媒を挙げることができる。これらの白金属系触媒のうち、ヘキサクロロ白金酸等の塩化白金酸、又はそのアルコール変性物、白金のビニルシロキサン錯体を用いることが、ヒドロシリル化反応を速やかに進行させる点で好ましく、より具体的には、白金・シクロビニルメチルシロキサン錯体、白金・カルボニルシクロビニルメチルシロキサン錯体、白金・ジビニルテトラメチルジシロキサン錯体、白金・テトラビニルシラン錯体、白金・カルボニルビニルメチル錯体白金・オクチルアルデヒド錯体、白金・オクタノール錯体等が挙げられる。 The catalyst is used for the addition reaction between the liquid diene polymer and the silicone having a hydrosilyl group, and examples of such catalysts include platinum, rhodium, palladium, ruthenium, and other platinum metal catalysts. . Among these platinum-based catalysts, it is preferable to use chloroplatinic acid such as hexachloroplatinic acid, alcohol-modified products thereof, and vinylsiloxane complexes of platinum from the viewpoint of speeding up the hydrosilylation reaction. is platinum/cyclovinylmethylsiloxane complex, platinum/carbonylcyclovinylmethylsiloxane complex, platinum/divinyltetramethyldisiloxane complex, platinum/tetravinylsilane complex, platinum/carbonylvinylmethyl complex platinum/octylaldehyde complex, platinum/octanol complex etc.
　以上のとおり、液状ジエン系重合体と、ヒドロシリル基を持つシリコーン化合物と、触媒と、を含有する液状混合組成物を架橋硬化したゲル状の充填材１５は、容器本体の外部に液状成分がブリードすることがない。また、ゲル状であるため押圧に対する反発があり、押圧により変形を生じるに過ぎない状態とは異なる。 As described above, the gel-like filler 15 obtained by cross-linking and curing the liquid mixture composition containing the liquid diene-based polymer, the silicone compound having the hydrosilyl group, and the catalyst causes the liquid component to bleed to the outside of the container body. I have nothing to do. In addition, since it is gel-like, there is repulsion against pressure, which is different from the state in which deformation is merely caused by pressure.
　充填材１５には、常温で変形可能な性質を損なわない範囲で、粘度や遮音性、振動減衰性などを調整するため、その他の理由により、反応遅延剤又は酸化防止剤、その他の添加剤を加えることができる。あるいはまた、シリカや樹脂粉末（ポリエチレン等）等の微粉末を含ませることができる。こうした材料を含ませることで充填材１５内を音が通り難くして外部からの雑音を取り込まない遮音性や減衰性が向上する。 The filler 15 contains a reaction retarder, an antioxidant, and other additives for adjusting the viscosity, sound insulation, vibration damping, etc., within the range that does not impair the deformable property at room temperature. can be added. Alternatively, fine powder such as silica or resin powder (polyethylene, etc.) can be included. Incorporation of such a material makes it difficult for sound to pass through the filling material 15, thereby improving sound insulation and damping properties that prevent noise from being taken in from the outside.
　充填材１５であるゲル状の架橋高分子は、針入度が６０以上であることが好ましく、１００～５００の範囲であることがより好ましい。針入度が５００を超えると、変形可能性・柔軟性が高くなりすぎ、充填材１５が収容される内部空間１２ａが空洞の場合と同様に反発性が過剰に高くなり耳に付けているという装着感が高まる。また、仮に、容器状基体１３が破れたような場合に外部に飛散し易い。そうした一方で、針入度が１００よりも小さいと、変形可能性・柔軟性が悪化し柔らかさが得られず装着感が悪くなる可能性があり、６０より低いとさらに装着感が悪くなる。好ましい針入度の範囲内においては、耳に付けているという装着感が抑えられ、違和感が小さくなる。針入度は、ＪＩＳＫ２２０７：１９９６に基づく２５℃の測定値である。 The gel-like crosslinked polymer used as the filler 15 preferably has a penetration of 60 or more, more preferably in the range of 100 to 500. If the penetration exceeds 500, the deformability and flexibility become too high, and the inner space 12a containing the filling material 15 has an excessively high resilience, similar to the case where the filling material 15 is hollow. A feeling of wearing increases. In addition, if the container-shaped substrate 13 were to break, it would easily scatter to the outside. On the other hand, if the penetration is less than 100, the deformability and flexibility may be deteriorated, and softness may not be obtained, resulting in poor wearing comfort. Within the preferable range of penetration, the wearing feeling of wearing the ear is suppressed, and the sense of discomfort is reduced. Penetration is a value measured at 25°C based on JISK2207:1996.
　また、充填材１５を封入したイヤーピース１０ａが低反発性であることで、耳穴に差し込む際には変形して差し込み易く、使用中は形状が維持されるとともに耳穴に対しては強く圧迫することのない、長期使用の際に使用感が良いものとなることができる。容器状基体１３のゴム状弾性による復元力に対して、充填材１５が充填されていることによって、復元力の発生を遅らせることができる。 In addition, since the earpiece 10a containing the filling material 15 has low resilience, it is easily deformed when inserted into the ear canal, and the shape is maintained during use, and the ear canal is not strongly pressed. However, the feeling of use can be good during long-term use. By filling the filler 15 with respect to the restoring force due to the rubber-like elasticity of the container-shaped substrate 13, generation of the restoring force can be delayed.
　充填材１５であるゲル状の架橋高分子は、その３０％圧縮荷重が９０ｋＰａ以下が好ましく、６０ｋＰａ以下がより好ましい。９０ｋＰａ以下であると、変形可能性、柔軟性、及び反発性が好ましく、６０ｋＰａ以下であれば、これらの性質がより好ましいものとなる。９０ｋＰａを越えると、変形可能性や柔軟性が低く触感が悪化する。 The 30% compression load of the gel-like crosslinked polymer that is the filler 15 is preferably 90 kPa or less, more preferably 60 kPa or less. When it is 90 kPa or less, deformability, flexibility, and resilience are preferable, and when it is 60 kPa or less, these properties become more preferable. If it exceeds 90 kPa, the deformability and flexibility are low, and the tactile sensation deteriorates.
　イヤーピース本体１２の内部に形成される充填材１５が収容される内部空間１２ａに対して充填材１５は５０～９５体積％、又は９５体積％を超えて１００体積％未満、又は１００体積％充填されることが好ましい。５０体積％よりも少ないと、内部空間１２ａを空間にした場合と同様で充填材１５を充填する効果が得られ難い。一方、１００％よりも多いと、押圧した場合の反発力が大きくなって硬い感触となり、柔らかさが乏しくなる。そして、５０～９５体積％として空気等の気泡を相当程度含ませることにより気泡の特徴が加味されたものとすることができる。又は９５体積％を超えて１００体積％未満として、若干気泡を含ませることでゴム状弾性膜と充填材１５の間に気泡が入り込みゴム状弾性膜と充填材１５の両者の性質を反映させ易くすることができる。又は１００体積％として気泡の影響を排除してゴム状弾性体膜と充填材１５とが一体となったものとすることができる。 The filling material 15 is 50 to 95% by volume, or more than 95% by volume and less than 100% by volume, or 100% by volume of the internal space 12a formed inside the earpiece body 12 and containing the filling material 15. preferably. If the content is less than 50% by volume, it is difficult to obtain the effect of filling the filler 15, as in the case where the internal space 12a is a space. On the other hand, if the amount is more than 100%, the repulsive force when pressed becomes large, resulting in a hard feel and poor softness. By including a considerable amount of bubbles such as air at 50 to 95% by volume, the characteristics of the bubbles can be added. Alternatively, if the content is more than 95% by volume and less than 100% by volume, air bubbles can enter between the rubber-like elastic membrane and the filler 15, and the properties of both the rubber-like elastic membrane and the filler 15 can be easily reflected. can do. Alternatively, the rubber-like elastic film and the filler 15 can be integrated with each other by eliminating the influence of air bubbles at 100% by volume.
　容器状基体１３や蓋体１４の内面又は外面には充填材１５や空気の浸透や透過を妨げる低透過性の浸透防止被膜を設けたり表面処理をしたりすることができる。こうした被膜形成としてはフッ素系コーティング剤による被膜形成や、ブチルゴム被膜、ウレタン系材質被膜などを挙げることができ、表面処理としては公知の撥水加工、撥油加工を挙げることができる。 The inner or outer surface of the container-like substrate 13 or the lid 14 can be provided with a filler 15 or a low-permeability permeation-preventing film that prevents permeation or permeation of air, or can be surface-treated. Examples of such film formation include film formation using a fluorine-based coating agent, butyl rubber film, and urethane-based material film. Examples of surface treatment include known water-repellent finishing and oil-repellent finishing.
　容器状基体１３と蓋体１４との固着には、接着剤や粘着剤を用いた方法や、溶着や融着などを用いた方法を利用することができる。固着後も固着部分の柔軟性が必要であるため、接着剤を用いる場合は固着後も柔軟性のある接着剤を用いることが好ましい。また、接着剤や粘着剤を用いる場合は、これらの材料もまた充填材１５が浸透や透過をしない材質であることが好ましい。共にシリコーンゴムからなる容器状基体１３と蓋体１４をシリコーンゴム接着剤で固着した態様は、押し潰した後、解放してもとの形状に戻す動作を５０００回繰り返しても液漏れを発生せず、または１００ｋｇｆまでの荷重試験に耐えられることから好ましい組み合わせである。 For fixing the container-shaped base 13 and the lid 14, a method using an adhesive or a pressure-sensitive adhesive, or a method using welding or fusing can be used. Since the fixed portion needs to be flexible even after being fixed, when using an adhesive, it is preferable to use an adhesive that is flexible even after being fixed. Moreover, when using an adhesive or a pressure-sensitive adhesive, it is preferable that these materials are also materials that the filler 15 does not permeate or permeate. In the embodiment in which the container-shaped substrate 13 and the lid body 14, both made of silicone rubber, are fixed with silicone rubber adhesive, liquid leakage does not occur even when the operation of crushing, releasing and returning to the original shape is repeated 5000 times. It is a preferable combination because it can withstand a load test of up to 100 kgf.
　イヤーピース１０ａの製造方法の一例を説明する。図３は容器状基体１３と蓋体１４を一体化する説明図である。容器状基体１３と蓋体１４は、予めゴム状弾性体材料から所定の形状に成形する。この際、それぞれの内周壁１３ｂ，１４ｂに硬質筒部１６ａ，１６ｂとなる硬質材が一体化するように、硬質材のインサート成形等により硬質筒部１６ａ，１６ｂを形成しておく。 An example of the manufacturing method of the earpiece 10a will be described. FIG. 3 is an explanatory diagram of how the container-shaped base 13 and the lid 14 are integrated. The container-shaped substrate 13 and the lid 14 are molded in advance from a rubber-like elastic material into a predetermined shape. At this time, hard cylinders 16a and 16b are formed by insert molding of a hard material so that the hard materials forming the hard cylinders 16a and 16b are integrated with the respective inner peripheral walls 13b and 14b.
　一方、充填材１５は、液状ジエン系重合体とヒドロシリル基を持つシリコーン化合物と触媒とを混合した液状混合組成物を調製しておき、その充填材１５を容器状基体１３内の中空部分に注入する。流動性が悪い材質を充填する際は、温度を上げて流動性を良くして充填することもできる。その後、容器状基体１３の「固着端部」となる開口部１３ａと蓋体１４とが、接着剤や粘着剤、溶着や融着などを利用して固着される。そして、充填材１５を封入した容器状基体１３と蓋体１４は５０～２００℃、好ましくは５０～１５０℃、より好ましくは８０～１２０℃に加熱される。これにより充填材１５は、液状混合組成物中の二重結合を有する液状ジエン系重合体とヒドロシリル基を持つシリコーンとをヒドロシリル化反応により結合し架橋硬化する。ここで、反応温度が５０℃よりも低いと、反応時間が長くなり生産効率が低下する。反応温度が２００℃より高いと、自動酸化劣化が生じ易くなる。５０～１５０℃がより好ましいのは、より酸化劣化が生じ難いからであり、８０～１２０℃がより好ましいのは生産効率を高めつつ酸化劣化を起こさないからである。 On the other hand, as the filler 15, a liquid mixture composition is prepared by mixing a liquid diene-based polymer, a silicone compound having a hydrosilyl group, and a catalyst. do. When filling a material with poor fluidity, it is possible to raise the temperature to improve the fluidity. After that, the opening 13a, which is the "fixed end" of the container-shaped substrate 13, and the lid 14 are fixed by using an adhesive, a pressure-sensitive adhesive, welding, fusion bonding, or the like. Then, the container-shaped substrate 13 enclosing the filler 15 and the lid 14 are heated to 50 to 200.degree. C., preferably 50 to 150.degree. C., more preferably 80 to 120.degree. As a result, the filler 15 bonds the liquid diene-based polymer having a double bond and the silicone having a hydrosilyl group in the liquid mixture composition by a hydrosilylation reaction and is crosslinked and cured. Here, if the reaction temperature is lower than 50°C, the reaction time will be long and the production efficiency will be lowered. If the reaction temperature is higher than 200° C., autoxidative deterioration tends to occur. A temperature of 50 to 150° C. is more preferable because oxidation deterioration is less likely to occur, and a temperature of 80 to 120° C. is more preferable because oxidation deterioration does not occur while improving production efficiency.
　以上の方法で容易にイヤーピース１０ａを製造することができる。こうした得られたイヤーピース１０ａは、耳穴に対応して柔軟に変形し耳に密着可能で装着感が良いとともに外部からの音が侵入し難い。また、イヤーピース１０ａ内に届く外部音も充填材１５で吸収され遮音性がよく、イヤホンとして利用すれば形状確保された硬質筒部１６内を音が通り低音域まで聞こえ易い。 The earpiece 10a can be easily manufactured by the above method. The earpiece 10a obtained in this way is flexibly deformable to correspond to the ear canal, can be brought into close contact with the ear, has a good wearing feeling, and is difficult for external sounds to penetrate. In addition, the external sound reaching the earpiece 10a is also absorbed by the filler 15, providing good sound insulation. When used as an earphone, the sound passes through the rigid cylindrical portion 16 whose shape is ensured, making it easy to hear even low frequencies.
　＜変形例１－１［図４］＞：
　変形例１－１のイヤーピース１０ｂを図４に示す。先の実施形態で説明したイヤーピース１０ａでは、硬質筒部１６の一部となる蓋体側筒部１６ｂを蓋体１４の内周壁１４ｂに設ける例を示した。これに対して変形例１－１では、容器状基体１３の内周壁１３ｂにのみ硬質筒部１６となる基体側筒部１６ａを設ける。これによれば蓋体１４の製造時に蓋体側筒部１６ｂを一体化する手間を省くことができ、製造コストを抑えることができる。また、変形例１－１では、容器状基体１３の開口部１３ａが内周壁１３ｂ側も幅広である。内周壁１３ｂ側も幅広であるため、開口部１３ａの面積を拡張して蓋体１４との固着力を高めることができる。 <Modification 1-1 [Fig. 4]>:
FIG. 4 shows an earpiece 10b of modification 1-1. In the earpiece 10a described in the previous embodiment, an example in which the lid-side tubular portion 16b, which is a part of the hard tubular portion 16, is provided on the inner peripheral wall 14b of the lid 14 is shown. On the other hand, in Modification 1-1, only the inner peripheral wall 13b of the container-shaped base 13 is provided with the base-side cylindrical portion 16a that serves as the hard cylindrical portion 16. As shown in FIG. According to this, it is possible to omit the trouble of integrating the lid-side cylindrical portion 16b at the time of manufacturing the lid 14, and it is possible to suppress the manufacturing cost. Further, in Modification 1-1, the opening 13a of the container-shaped base 13 is wide on the inner peripheral wall 13b side as well. Since the inner peripheral wall 13b side is also wide, the area of the opening 13a can be expanded and the fixing force with the lid body 14 can be increased.
　＜変形例１－２［図５］＞：
　変形例１－２のイヤーピース１０ｃを図５に示す。変形例１－１のイヤーピース１０ｂでは、硬質筒部１６（基体側筒部１６ａ）の表面には蓋体１４が位置していない。これに対して変形例１－２では、硬質筒部１６（基体側筒部１６ａ）の端面を蓋体１４で覆うとともに蓋体１４と硬質筒部１６とを固着している。変形例１－２によれば、蓋体１４と容器状基体１３との固着力を高めることができる。 <Modification 1-2 [Fig. 5]>:
FIG. 5 shows an earpiece 10c of modification 1-2. In the earpiece 10b of Modified Example 1-1, the cover 14 is not positioned on the surface of the hard tubular portion 16 (base-side tubular portion 16a). On the other hand, in Modified Example 1-2, the end surface of the hard tubular portion 16 (substrate-side tubular portion 16a) is covered with the lid 14, and the lid 14 and the hard tubular portion 16 are fixed together. According to Modification 1-2, the fixing force between the lid 14 and the container-shaped base 13 can be increased.
　＜変形例１－３［図６］＞：
　変形例１－３のイヤーピース１０ｄを図６に示す。イヤーピース１０ｄは、硬質筒部１６を用いていない点で、これまでのイヤーピース１０ａ～１０ｃと異なる。硬質筒部１６を設けないことでイヤーピース１０ｄ全体の柔らかさを増大させることができる。また、硬質筒部１６を設けない分だけ製造が容易である。 <Modification 1-3 [Fig. 6]>:
FIG. 6 shows an earpiece 10d of modification 1-3. The earpiece 10d differs from the previous earpieces 10a to 10c in that the rigid tubular portion 16 is not used. By not providing the hard tubular portion 16, the softness of the entire earpiece 10d can be increased. In addition, manufacturing is easy because the hard cylindrical portion 16 is not provided.
　＜変形例１－４［図７］＞：
　変形例１－４のイヤーピース１０ｅを図７に示す。イヤーピース１０ｅは、硬質筒部１６を設けず、さらには貫通孔１１を設けていない点でこれまでのイヤーピース１０ａ～１０ｄと異なる。貫通孔１１を設けないことで、耳栓などの用途に好適に用いることができる。 <Modification 1-4 [Fig. 7]>:
FIG. 7 shows an earpiece 10e of modification 1-4. The earpiece 10e differs from the previous earpieces 10a to 10d in that the hard cylindrical portion 16 is not provided and the through hole 11 is not provided. By not providing the through-hole 11, it can be suitably used for applications such as earplugs.
　＜第２実施形態［図８］＞：
　第１実施形態は軟質触感体をイヤーピースに用いた実施態様を示したが、第２実施形態では、クッション体に用いた実施態様を示す。図８にはクッション体２０ａの正面図と断面図、図９には変形例２－１のクッション体２０ｂの正面図と断面図をそれぞれ示す。以下、クッション体２０ａ，２０ｂをまとめてクッション体２０ともいう。 <Second Embodiment [Fig. 8]>:
The first embodiment shows an embodiment in which the soft tactile body is used for the ear piece, but the second embodiment shows an embodiment in which the soft tactile body is used for the cushion body. FIG. 8 shows a front view and a cross-sectional view of a cushion body 20a, and FIG. 9 shows a front view and a cross-sectional view of a cushion body 20b of modification 2-1. Hereinafter, the cushion bodies 20a and 20b are collectively referred to as the cushion body 20 as well.
　まず、第２実施形態のクッション体２０ａは、容器状基体２３と蓋体２４とからなるクッション本体２２と、そのクッション本体２２の中に封入される充填材２５とで形成されている。容器状基体２３における蓋体２４と反対側の端部は、身体に接触させる柔軟側端部２３ｄを有する。こうした形状は図７で示すイヤーピース１０ｅと概ね同じであるが、イヤーピース１０ｅが耳に挿入できる大きさであるのに対し、クッション体２０ａは蓋体２４を床に置いて柔軟側端部２３ｄに腰を下ろせる程度の大きさ等の適度な大きさである。なお、本実施形態の態様はクッション体であるので、容器状基体２３と蓋体２４とからなる容器本体をクッション本体２２としている。 First, the cushion body 20a of the second embodiment is formed of a cushion body 22 composed of a container-shaped base body 23 and a lid body 24, and a filler 25 enclosed in the cushion body 22. As shown in FIG. The end of the container-shaped base 23 opposite to the lid 24 has a flexible side end 23d that contacts the body. Such a shape is roughly the same as the earpiece 10e shown in FIG. 7, but while the earpiece 10e is large enough to be inserted into the ear, the cushion body 20a is placed on the flexible side end 23d with the lid body 24 placed on the floor. It is a moderate size such as a size that can be lowered. Since the aspect of the present embodiment is a cushion body, the container body composed of the container-shaped base body 23 and the lid body 24 is used as the cushion body 22 .
　クッション体２０ａにおける容器状基体２３及び蓋体２４の材質、そしてクッション体２０ａの製造方法は、第１実施形態のイヤーピース１０ａにおける容器状基体１３及び蓋体２４の材質、並びに製造方法と同じである。 The materials of the container-shaped base body 23 and the lid body 24 in the cushion body 20a and the manufacturing method of the cushion body 20a are the same as the materials and the manufacturing method of the container-shaped base body 13 and the lid body 24 in the earpiece 10a of the first embodiment. .
　＜変形例２－１［図９］＞：
　変形例２－１のクッション体２０ｂは、図９で示すように、貫通孔２１を有する。図６で示す変形例１－３のイヤーピース１０ｄと概ね外形は同じである。 <Modification 2-1 [Fig. 9]>:
The cushion body 20b of modification 2-1 has through holes 21 as shown in FIG. The external shape is generally the same as that of the earpiece 10d of Modified Example 1-3 shown in FIG.
　＜第３実施形態［図１０］＞：
　第３実施形態は軟質触感体をイヤーピース又はクッション体の何れにも用いられる態様である。これまでの実施形態で説明した軟質触感体は、容器状基体と蓋体とが一体になったものとして説明してきたが、本実施形態の軟質触感体は、蓋体に相当する部分がなく、容器状基体のみからなる点を特徴としている。図１０にはこの軟質触感体３０の正面図、断面図と左側面図を示す。これらの図で示すように、軟質触感体３０は円筒状に形成された内側に貫通孔３１を有している。 <Third Embodiment [Fig. 10]>:
The third embodiment is a mode in which the soft tactile body is used as either an earpiece or a cushion body. The soft tactile body described in the embodiments so far has been described as one in which the container-shaped substrate and the lid are integrated. It is characterized in that it consists only of a container-like substrate. FIG. 10 shows a front view, a sectional view and a left side view of the soft tactile body 30. As shown in FIG. As shown in these figures, the soft tactile body 30 has a through hole 31 formed inside a cylindrical shape.
　軟質触感体３０の製造方法は、蓋体がないためこれまでの実施形態における軟質触感体とは異なり、容器状基体と蓋体との接着工程はない。そうした一方で、中空の容器本体３２を成形した後、その内部の空気を注射針等で抜き、その後充填材３５となる液状混合組成物を注入して硬化させる工程を行う。注射針等で生じた穴は、接着材等で閉塞するか、ゴム状シールで閉塞する。 The manufacturing method of the soft tactile body 30 does not have a lid, so unlike the soft tactile bodies in the previous embodiments, there is no step of adhering the container-shaped substrate and the lid. On the other hand, after the hollow container body 32 is molded, the air inside is removed with an injection needle or the like, and then a liquid mixed composition to be the filler 35 is injected and cured. A hole made by an injection needle or the like is closed with an adhesive or the like, or closed with a rubber-like seal.
　クッション体２０ａ、２０ｂ及び軟質触感体３０によれば、外周壁２３ｃはゴム状弾性膜でなり、特にシリコーンゴムで形成すれば、表面の肌触りが良く、内部に低硬度なゲル状物を充填しているため、押して戻ってくる弾力性が好ましく触感に優れている。 According to the cushion bodies 20a and 20b and the soft tactile body 30, the outer peripheral wall 23c is made of a rubber-like elastic film, and especially if it is made of silicone rubber, the surface feels good on the skin and the inside is filled with a low-hardness gel-like material. Therefore, it has good elasticity to be pushed back and has excellent tactile sensation.
　クッション体２０ａ、２０ｂ及び軟質触感体３０は、ゴーグル、ＶＲゴーグル等に付くフェイスパッド、ノーズパッド、ベルトやバンド、ストラップ等の身体当接面に装着するクッションパッド、靴の内面に装着するクッションパッド、座席やチャイルドシート、ベビーカー等の座面、背面、頭部面に装着するクッションパッド、筆記具や工具、ハンドル、ステアリングホイール等の把持部を覆うクッションパッド（グリップ）、屋内外の手摺りや突起部などを覆うクッションパッド、ドアの閉じ音緩衝用に戸当たり部分や蝶番部分に設けるクッション等の住宅関連又は建材関連部材、光センサや静電センサ等の電子部品周りの表面装飾や緩衝材又は封止材等の民生用、産業用の広い様々な用途に利用することができる。そしてこれらの用途に利用するクッション体２０ａ、２０ｂ及び軟質触感体３０は触感に優れていることはもとより、滑り防止や衝突緩衝、保護用等といった効果を得ることもできる。 The cushion bodies 20a, 20b and the soft tactile body 30 are a face pad attached to goggles, VR goggles, etc., a nose pad, a cushion pad attached to the body contact surface such as a belt, band, strap, etc., and a cushion pad attached to the inner surface of the shoe. , Seats, child seats, cushion pads attached to the seat surface, back surface, and head surface of strollers, etc. housing-related or building-related materials such as cushions provided on doorstops and hinges to dampen the sound of door closing, surface decoration, cushioning materials, or sealing around electronic parts such as optical sensors and electrostatic sensors It can be used for a wide variety of purposes such as consumer and industrial use. The cushion bodies 20a and 20b and the soft tactile body 30 used for these applications not only have excellent tactile sensation, but also provide effects such as anti-slipping, cushioning against collisions, and protection.
前記実施形態は本発明の例示であり、本発明の趣旨を逸脱しない範囲で、実施形態の変更又は公知技術の付加、組合せ等を行い得るものであり、それらの技術もまた本発明の範囲に含まれるものである。例えば、第１実施形態及びその変形例で示したイヤーピースを、大きさを変えてクッション体として利用することができ、その反対に第２実施形態及びその変形例で示したクッション体を、大きさを変えてイヤーピースとして利用することもできる。容器本体は、容器状基体を蓋体で閉じたもののほか、用途によっては蓋体を用いずに容器状基体が開口した容器本体としてもよい。充填材はゲル状の架橋高分子のため容器状基体から流れ出にくいためである。容器本体や充填材は透明にするほか顔料等を添加して着色させることもできる。 The above embodiments are examples of the present invention, and modifications of the embodiments, additions, combinations, etc. of known techniques can be performed without departing from the scope of the present invention, and such techniques are also within the scope of the present invention. It is included. For example, the earpieces shown in the first embodiment and its modifications can be used as cushion bodies with different sizes, and conversely, the cushion bodies shown in the second embodiment and its modifications can be used as cushion bodies with different sizes. You can also use it as an earpiece by changing the . The container body may be a container body in which a container-shaped substrate is closed with a lid, or a container body in which a container-shaped substrate is opened without using a lid depending on the application. This is because the filler is a gel-like cross-linked polymer and therefore does not readily flow out of the container-like substrate. The main body of the container and the filling material can be made transparent or colored by adding a pigment or the like.
　＜試料１～試料１７の作製＞
　次に実施例（比較例）に基づいて本発明をさらに説明する。以下の各表に示す材料を「組成」で示すとおり混合してなる液状混合組成物を試料１～試料１７とした。なお、表中で示す「組成」は、何れも質量部を示す。また、各表の「性質」欄に以下で詳述する各試料の特徴について示した。
　そして、液状混合組成物を１２０℃で２時間硬化させ、後述する「針入度」及び「３０％圧縮荷重」試験に沿った大きさからなる試料１～試料１７のゲル状の充填材を得た。 <Production of Samples 1 to 17>
Next, the present invention will be further described based on examples (comparative examples). Samples 1 to 17 were obtained by mixing the materials shown in the following tables as shown in "Composition". The "composition" shown in the tables indicates parts by mass. In addition, the characteristics of each sample described in detail below are shown in the "Properties" column of each table.
Then, the liquid mixture composition was cured at 120° C. for 2 hours to obtain gel-like fillers of Samples 1 to 17 having sizes according to the “penetration” and “30% compression load” tests described later. rice field.
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000002
Figure JPOXMLDOC01-appb-T000002
　試料１～試料１２に用いた「液状ジエン系重合体」は次のとおりである。試料１は、液状ポリブタジエン（クラレ社製、ＬＢＲ－３０７）、試料２は、液状ポリブタジエン（クラレ社製、ＬＢＲ－３５２）、試料３は、液状イソプレン（クラレ社製、ＬＩＲ－３０）、試料４は、液状イソプレン（クラレ社製、ＬＩＲ－５０）、試料５は、液状ポリブタジエン（日本曹達社製、Ｂ－１０００）、試料６は、液状ポリブタジエン（日本曹達社製、Ｂ－２０００）、試料７は、液状ポリブタジエン（日本曹達社製、Ｂ－３０００）、試料８は、液状ブタジエン（クレイバレー社製、Ｒｉｃｏｎ１３４）、試料９は、スチレンブタジエンランダム共重合体（クレイバレー社製、Ｒｉｃｏｎ１８１）、試料１０は、スチレンブタジエンランダム共重合体（クレイバレー社製、Ｒｉｃｏｎ１８４）、試料１１は、スチレンブタジエンランダム共重合体（クラレ社製、Ｌ－ＳＢＲ－８２０）、試料１２は、液状ニトリルゴム（カルボキシル末端ブタジエン－アクリロニトリル共重合体）（ＨＵＮＴＳＭＡＮ社製、Ｈｙｐｒｏ（商品名）、１３００Ｘ３１ＣＴＢＮ）である。 The "liquid diene-based polymer" used in Samples 1 to 12 is as follows. Sample 1 is liquid polybutadiene (LBR-307, manufactured by Kuraray Co., Ltd.), sample 2 is liquid polybutadiene (LBR-352, manufactured by Kuraray Co., Ltd.), sample 3 is liquid isoprene (LIR-30, manufactured by Kuraray Co., Ltd.), and sample 4. is liquid isoprene (LIR-50, manufactured by Kuraray Co., Ltd.), sample 5 is liquid polybutadiene (B-1000, manufactured by Nippon Soda Co., Ltd.), sample 6 is liquid polybutadiene (B-2000, manufactured by Nippon Soda Co., Ltd.), sample 7 is liquid polybutadiene (manufactured by Nippon Soda Co., Ltd., B-3000), sample 8 is liquid butadiene (manufactured by Clay Valley Co., Ricon 134), sample 9 is a styrene-butadiene random copolymer (manufactured by Clay Valley Co., Ricon 181), sample 10 is a styrene-butadiene random copolymer (Ricon 184, manufactured by Clay Valley), sample 11 is a styrene-butadiene random copolymer (L-SBR-820, manufactured by Kuraray), sample 12 is a liquid nitrile rubber (carboxyl terminal butadiene-acrylonitrile copolymer) (manufactured by HUNTSMAN, Hypro (trade name), 1300X31CTBN).
　試料１３～試料１７に用いた「液状ジエン系重合体」又は「液状ジエン系重合体以外」は次のとおりである。試料１３は、水素添加ポリイソプレン（クラレ社製、ＬＩＲ－２９０）、試料１４は、スチレンイソプレンブロック重合体（クラレ社製、ＬＩＲ－３１０）、試料１５は、ポリイソブチレン（カネカ社製、ＥＰ－４５０Ａ）、試料１６は、２液混合硬化型シリコーンゲル（信越化学工業社製、ＫＥ－１０５２）、試料１７は、流動パラフィン（ＭＯＲＥＳＣＯ社製、Ｐ－２６０）である。 "Liquid diene-based polymer" or "other than liquid diene-based polymer" used in Samples 13 to 17 are as follows. Sample 13 is hydrogenated polyisoprene (LIR-290, manufactured by Kuraray Co., Ltd.), sample 14 is a styrene isoprene block polymer (LIR-310, manufactured by Kuraray Co., Ltd.), and sample 15 is polyisobutylene (EP- 450A), Sample 16 is a two-liquid mixed curable silicone gel (KE-1052, manufactured by Shin-Etsu Chemical Co., Ltd.), and Sample 17 is liquid paraffin (P-260, manufactured by MORESCO).
　また、各試料に用いたヒドロシリル基を持つシリコーン化合物は、分子中に平均５個のヒドロシリル基を有するハイドロジェンシロキサン系化合物であり、表中には「ハイドロジェンシロキサン系化合物」と表示している。触媒には、白金触媒（Ｄｏｗ社製、ＳＲＸ２１２）を用い、さらに、硬化遅延剤としてエチニルシクロヘキサノール（旭化成ワッカーシリコーン社製、ＰＴ８８）を用いた。また、試料によっては、酸化防止剤としてジブチルヒドロキシトルエン（川口化学工業社製、ＢＨＴ）を用いた。 The silicone compound having a hydrosilyl group used in each sample is a hydrogensiloxane compound having an average of 5 hydrosilyl groups in the molecule, and is indicated as "hydrogensiloxane compound" in the table. . A platinum catalyst (SRX212 manufactured by Dow) was used as a catalyst, and ethynylcyclohexanol (PT88 manufactured by Asahi Kasei Wacker Silicone Co., Ltd.) was used as a curing retarder. In addition, depending on the sample, dibutylhydroxytoluene (BHT manufactured by Kawaguchi Chemical Industry Co., Ltd.) was used as an antioxidant.
　また、各表における「性質」の欄に示した各項目は次のとおりである。
　「粘度（Ｐａ・ｓ／３０℃）」は、「液状ジエン系重合体」又は「液状ジエン系重合体以外」の項目に示した物質の粘度を表し、粘度計（ＢＲＯＯＫＦＩＥＬＤ製回転粘度計ＤＶ－Ｅ）（スピンドルＳＣ４－１４、チャンバーＳＣ４－６Ｒ／ＲＰを使用、回転速度５ｒｐｍ、測定温度３０℃）で測定した結果である。
　「針入度」、「３０％圧縮荷重（ｋＰａ）」及び「オイルブリード」の欄に記載した事項については後述する。 In addition, each item shown in the "property" column in each table is as follows.
"Viscosity (Pa s / 30 ° C.)" represents the viscosity of the substance shown in the item "liquid diene polymer" or "other than liquid diene polymer". E) Results of measurement using spindle SC4-14, chamber SC4-6R/RP, rotation speed 5 rpm, measurement temperature 30°C.
The items described in the columns of "penetration", "30% compression load (kPa)" and "oil bleed" will be described later.
　＜各種試験＞：
　前記各試料について、以下に説明する各種試験を行った。 <Various tests>:
Various tests described below were performed on each of the samples.
　〔触感適性１〕針入度：
　軟質触感体の触感を評価するため、硬化後の充填材の柔らかさを針入度の観点から評価した。より具体的には、ＪＩＳＫ２２０７：１９９６に基づく２５℃の測定値を各表の「針入度」欄に記載した。 [Tactile suitability 1] Penetration:
In order to evaluate the tactile feel of the soft tactile material, the softness of the cured filler was evaluated from the viewpoint of penetration. More specifically, the measured values at 25° C. based on JISK2207:1996 are shown in the "Penetration" column of each table.
　〔触感適性２〕３０％圧縮荷重：
　イヤーピースの触感を評価するため、硬化後の充填材の柔らかさを３０％圧縮荷重の観点から評価した。圧縮荷重試験は、試験片に対する圧縮量と反発荷重との関係を調べる試験であり、図１１の模式図で示す荷重試験機８を用いて試験する。荷重試験機は、等電流源４と、データロガー５（エー・アンド・デイ社製「Ｒｅｍｏｔｅ　Ｓｃａｎｎｅｒ　Ｊｒ．　ＤＣ３１００」）、ロードセル６（アイコーエンジニアリング社製「ＭＯＤＥＬ－３００５」）、ゲージセンサ７（小野測器社製「ＧＳ－１６３０Ａ」）と、測定台２と、直径１０ｍｍの円柱棒形状である金属押子３を有しており、試験片１を測定台２に乗せて、金属押子３で圧縮する。金属押子３はロードセル６に実装され、ロードセル６の上部にゲージセンサ７が実装されており、ロードセル６とゲージセンサ７はそれぞれデータロガー５と電気的に接続がされて、データロガー５とゲージセンサ７により試験片１の圧縮量を測定するための回路が形成される。 [Tactile suitability 2] 30% compression load:
In order to evaluate the tactile feel of the earpiece, the softness of the cured filler was evaluated in terms of 30% compressive load. The compressive load test is a test for investigating the relationship between the amount of compression and the repulsive load on the test piece, and the test is performed using a load tester 8 shown in the schematic diagram of FIG. 11 . The load tester includes a constant current source 4, a data logger 5 ("Remote Scanner Jr. DC3100" manufactured by A&D), a load cell 6 ("MODEL-3005" manufactured by Aiko Engineering), a gauge sensor 7 (Ono "GS-1630A" manufactured by Sokki Co., Ltd.), a measuring table 2, and a cylindrical bar-shaped metal pusher 3 with a diameter of 10 mm. Compress with . The metal pusher 3 is mounted on the load cell 6, and the gauge sensor 7 is mounted on the top of the load cell 6. The load cell 6 and the gauge sensor 7 are electrically connected to the data logger 5, respectively, and the data logger 5 and the gauge are connected. Sensor 7 forms a circuit for measuring the amount of compression of test strip 1 .
　上記回路の電流は等電流源４により１ｍＡに固定しており、試験片１の圧縮に伴うロードセル６内の抵抗の変化と、試験片１の圧縮に伴うゲージセンサ７内の抵抗の変化をデータロガー５によりそれぞれ電圧（ｍＶ）として読み取り、それらの値から試験片１を圧縮した際の圧縮荷重値と圧縮量を算出した。
　実際の測定では、厚み２４ｍｍである各試験片１を毎分１ｍｍの速度で圧縮し、０．５秒毎の経時的な荷重と圧縮量の値をデータロガー５により記録し、圧縮率３０％における荷重の値を算出した。その測定値を各表の「３０％圧縮荷重」欄に示した。 The current of the above circuit is fixed at 1 mA by the constant current source 4, and the resistance change in the load cell 6 accompanying the compression of the test piece 1 and the resistance change in the gauge sensor 7 accompanying the compression of the test piece 1 are data. Each voltage (mV) was read by the logger 5, and the compression load value and compression amount when the test piece 1 was compressed were calculated from these values.
In the actual measurement, each test piece 1 having a thickness of 24 mm was compressed at a speed of 1 mm per minute, and the data logger 5 recorded the values of the load and compression amount over time every 0.5 seconds, and the compression ratio was 30%. was calculated. The measured values are shown in the "30% compression load" column of each table.
　〔オイルブリード〕オイルブリード：
　イヤーピースからの液状成分の外部への浸出の程度を評価した。より具体的には、厚み１ｍｍのシリコーンゴム製の容器状基体に前記試料１～１７の液状混合組成物を注入し、１２０℃で２時間硬化させた後（硬化しない試料はそのまま）、室温で一週間放置し、容器状基体の表面にオイル状の光沢の発生の有無を目視により観察評価することと、前記オイル状の光沢が紙ウエスによって拭き取りができるかを観察することで、オイルブリードの有無を判断した。そして、オイルブリードの有無を各表の「オイルブリード」欄に示した。 [Oil Bleed] Oil Bleed:
The degree of exudation of the liquid component from the earpiece to the outside was evaluated. More specifically, the liquid mixture compositions of Samples 1 to 17 were poured into a silicone rubber container-shaped substrate having a thickness of 1 mm, cured at 120° C. for 2 hours (uncured samples were left as they were), and then cured at room temperature. After leaving for a week, the presence or absence of oil-like gloss on the surface of the container-shaped substrate was visually observed and evaluated, and by observing whether the oil-like gloss could be wiped off with a paper waste, the oil bleeding was confirmed. determined whether or not The presence or absence of oil bleed is shown in the "oil bleed" column of each table.
　＜考察＞：
　前記各試験の各結果に基づき、以下の考察を行った。 <Discussion>:
Based on the results of the above tests, the following considerations were made.
　液状ジエン系重合体の粘度は、試料１～１２はいずれも５００Ｐａ・ｓ以下の低いものであり、液状混合組成物として調製したものは容器本体に注入可能な粘度とすることができた。試料１３～１５は液状ジエン系重合体の粘度が１０００Ｐｓ・ｓ以上と高すぎて、液状混合組成物としたあと容器本体への注入が難しかった。試料１～１２の充填材は、針入度がいずれも６０以上であり、また３０％圧縮荷重が６０ｋＰａ以下となり、容器状基体に封入したものは変形可能性、柔軟性、および反発性が好ましいものとなった。一方、試料１３～１５の充填材は針入度が１０以下と小さく、３０％圧縮荷重が９０ｋＰａを越え、容器状基体に封入したものは変形可能性や柔軟性が低いものとなった。 The viscosities of the liquid diene-based polymers were all as low as 500 Pa·s or less for samples 1 to 12, and those prepared as liquid mixed compositions were able to have viscosities that could be injected into the container body. In Samples 13 to 15, the viscosity of the liquid diene-based polymer was too high at 1000 Ps·s or more, and it was difficult to pour into the container main body after forming the liquid mixed composition. The fillers of Samples 1 to 12 all have a penetration of 60 or more, and a 30% compression load of 60 kPa or less. became a thing. On the other hand, the fillers of Samples 13 to 15 had a small penetration of 10 or less, a 30% compressive load of over 90 kPa, and a container-like substrate with low deformability and flexibility.
　試料１～１５の充填材は、架橋高分子であり、シリコーンゴムからなる容器状基体に封入したものはオイルブリードが生じなかった。試料１６は、２液混合硬化型のシリコーンゲルであり、粘度が低く、架橋後の充填材は針入度の大きなものとなったが、シリコーンゴムからなる容器状基体に対して親和性が高いためか、残存する低分子量シリコーン成分が染み出してオイルブリードが生じてしまった。試料１７は流動パラフィンを液状のまま充填材としたものであるが、シリコーンゴムからなる容器状基体から染み出してオイルブリードが生じてしまった。 The filler of samples 1 to 15 was a crosslinked polymer, and oil bleeding did not occur when enclosed in a container-shaped substrate made of silicone rubber. Sample 16 is a two-liquid mixed curing type silicone gel, which has a low viscosity and a high penetration of the filler after cross-linking, but has a high affinity for container-shaped substrates made of silicone rubber. Perhaps because of this, the remaining low-molecular-weight silicone component seeped out, causing oil bleeding. In sample 17, liquid paraffin was used as a filler in a liquid state, but oil bleed occurred due to exudation from the container-like substrate made of silicone rubber.
　１０ａ　イヤーピース（軟質触感体；第１実施形態）、２０ａ　クッション体（軟質触感体；第２実施形態）、３０　軟質触感体（第３実施形態） 10a earpiece (soft tactile body; first embodiment), 20a cushion body (soft tactile body; second embodiment), 30 soft tactile body (third embodiment)

Claims (13)

  1. 容器本体に充填材が封入された軟質触感体であって、
    前記充填材が、液状ジエン系重合体と、ヒドロシリル基を持つシリコーン化合物と、触媒と、を含む液状混合組成物のゲル状架橋高分子である軟質触感体。     A soft tactile body in which a filler is enclosed in a container body,
    A soft tactile body in which the filler is a gel-like crosslinked polymer of a liquid mixture composition containing a liquid diene polymer, a silicone compound having a hydrosilyl group, and a catalyst.
  2. 前記液状ジエン系重合体は、ポリブタジエン、ポリイソプレン、クロロプレン、又はこれらのブロック若しくはランダム共重合体の何れかの骨格を含む
    請求項１記載の軟質触感体。     2. The soft tactile material according to claim 1, wherein said liquid diene-based polymer includes a skeleton of polybutadiene, polyisoprene, chloroprene, or block or random copolymers thereof.
  3. 前記液状ジエン系重合体の３０℃における粘度が、１～５００Ｐａ・ｓである
    請求項１又は請求項２記載の軟質触感体。     3. The soft tactile material according to claim 1, wherein the liquid diene polymer has a viscosity at 30° C. of 1 to 500 Pa·s.
  4. 前記ヒドロシリル基を持つシリコーン化合物の含有量が、前記液状ジエン系重合体１００質量部に対して０．５～１４質量部である
    請求項１～請求項３何れか１項記載の軟質触感体。     4. The soft touch material according to any one of claims 1 to 3, wherein the content of said silicone compound having a hydrosilyl group is 0.5 to 14 parts by mass with respect to 100 parts by mass of said liquid diene polymer.
  5. 前記架橋高分子のＪＩＳＫ２２０７：１９９６に基づく針入度が６０以上である
    請求項１～請求項４何れか１項記載の軟質触感体。     The soft tactile material according to any one of claims 1 to 4, wherein the crosslinked polymer has a penetration of 60 or more according to JISK2207:1996.
  6. 前記容器本体の内部空間に対して前記充填材が５０～１００体積％充填されている
    請求項１～請求項５何れか１項記載の軟質触感体。     6. The soft tactile body according to any one of claims 1 to 5, wherein the inner space of the container body is filled with the filler in an amount of 50 to 100% by volume.
  7. 前記容器本体は、ゴム状弾性膜からなり一方端に開口部を有する容器状基体と、前記開口部を液密に封止する蓋体と、を有している
    請求項１～請求項６何れか１項記載の軟質触感体。     7. Any one of claims 1 to 6, wherein the container main body comprises a container-like base body made of a rubber-like elastic film and having an opening at one end, and a lid for liquid-tightly sealing the opening. 1. The soft tactile body according to 1.
  8. 前記容器状基体の硬度が、ＪＩＳＫ６２５３－３：２０１２に基づくタイプＡデュロメータを用いた硬度（ＪＩＳ－Ａ硬度）で５～３０である
    請求項７記載の軟質触感体。     8. The soft tactile body according to claim 7, wherein said container-like substrate has a hardness of 5 to 30 as measured using a type A durometer based on JISK6253-3:2012 (JIS-A hardness).
  9. 前記容器状基体が中空環状であり、
    前記蓋体が環状板形状であり、
    前記容器本体が、前記容器状本体又は前記蓋体の内周部に硬質筒部を有する
    請求項７又は請求項８記載の軟質触感体。     The container-shaped substrate is hollow annular,
    The lid has an annular plate shape,
    9. The soft tactile body according to claim 7 or 8, wherein said container body has a hard tubular portion on the inner periphery of said container-shaped body or said lid.
  10. 前記軟質触感体が、イヤーピース又はクッション体の何れかである
    請求項１～請求項９何れか１項記載の軟質触感体。     The soft tactile body according to any one of claims 1 to 9, wherein the soft tactile body is either an ear piece or a cushion body.
  11. 容器本体に充填材が封入された軟質触感体の製造方法であって、
    液状ジエン系重合体と、ヒドロシリル基を持つシリコーン化合物と、触媒と、を含む液状混合組成物を調製し、
    前記容器本体の内部空間に、前記液状混合組成物を注入、加熱して、当該液状混合組成物を反応硬化させゲル状の前記充填材を得る軟質触感体の製造方法。     A method for manufacturing a soft tactile body in which a filler is enclosed in a container body,
    preparing a liquid mixture composition containing a liquid diene-based polymer, a silicone compound having a hydrosilyl group, and a catalyst;
    A method for producing a soft tactile body in which the liquid mixture composition is injected into the inner space of the container body and heated to react and cure the liquid mixture composition to obtain the gel filler.
  12. 前記加熱により前記液状混合組成物を反応硬化させる温度が５０～２００℃である
    請求項１１記載の軟質触感体の製造方法。     12. The method for producing a soft tactile member according to claim 11, wherein the temperature at which the liquid mixture composition is reactively cured by heating is 50 to 200°C.
  13. 前記軟質触感体が、イヤーピース又はクッション体の何れかである
    請求項１１又は請求項１２記載の軟質触感体の製造方法。     13. The method for manufacturing a soft tactile body according to claim 11 or 12, wherein the soft tactile body is either an ear piece or a cushion body.
PCT/JP2022/021471 2021-06-29 2022-05-25 Soft texture body WO2023276500A1 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008255343A (en) * 2007-03-12 2008-10-23 Shin Etsu Chem Co Ltd Hydrosilylation inhibitor, hydrosilylation catalyst composition, and curable composition
JP2010540721A (en) * 2007-09-26 2010-12-24 ダウ・コーニング・コーポレイション Silicone organic elastomer gel from organopolysiloxane resin

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008255343A (en) * 2007-03-12 2008-10-23 Shin Etsu Chem Co Ltd Hydrosilylation inhibitor, hydrosilylation catalyst composition, and curable composition
JP2010540721A (en) * 2007-09-26 2010-12-24 ダウ・コーニング・コーポレイション Silicone organic elastomer gel from organopolysiloxane resin

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