WO2023026752A1 - シール体の製造方法、及びシール体 - Google Patents

シール体の製造方法、及びシール体 Download PDF

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Publication number
WO2023026752A1
WO2023026752A1 PCT/JP2022/028911 JP2022028911W WO2023026752A1 WO 2023026752 A1 WO2023026752 A1 WO 2023026752A1 JP 2022028911 W JP2022028911 W JP 2022028911W WO 2023026752 A1 WO2023026752 A1 WO 2023026752A1
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WIPO (PCT)
Prior art keywords
kneading
manufacturing
seal body
belt
linking agent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2022/028911
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English (en)
French (fr)
Japanese (ja)
Inventor
晨一郎 岡
健介 関口
裕一 青柳
佳太 鈴木
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nok Corp
Original Assignee
Nok Corp
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Filing date
Publication date
Application filed by Nok Corp filed Critical Nok Corp
Priority to CN202280057253.5A priority Critical patent/CN117836543A/zh
Priority to JP2023543759A priority patent/JP7625708B2/ja
Priority to EP22861043.2A priority patent/EP4394212A4/en
Priority to US18/290,654 priority patent/US20250084288A1/en
Publication of WO2023026752A1 publication Critical patent/WO2023026752A1/ja
Anticipated expiration legal-status Critical
Priority to JP2024204338A priority patent/JP2025019213A/ja
Ceased legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K3/00—Materials not provided for elsewhere
    • C09K3/10—Materials in mouldable or extrudable form for sealing or packing joints or covers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
    • C09J133/04—Homopolymers or copolymers of esters
    • C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • C09J133/062—Copolymers with monomers not covered by C09J133/06
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D99/00—Subject matter not provided for in other groups of this subclass
    • B29D99/0053—Producing sealings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D99/00—Subject matter not provided for in other groups of this subclass
    • B29D99/0082—Producing articles in the form of closed loops, e.g. rings
    • B29D99/0085—Producing articles in the form of closed loops, e.g. rings for sealing purposes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
    • C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
    • C08F220/10—Esters
    • C08F220/12—Esters of monohydric alcohols or phenols
    • C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
    • C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
    • C08F220/1802—C2-(meth)acrylate, e.g. ethyl (meth)acrylate
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K3/00—Materials not provided for elsewhere
    • C09K3/10—Materials in mouldable or extrudable form for sealing or packing joints or covers
    • C09K3/1006—Materials in mouldable or extrudable form for sealing or packing joints or covers characterised by the chemical nature of one of its constituents
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
    • F16J15/108—Special methods for making a non-metallic packing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3284—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structure; Selection of materials
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
    • G01M3/18—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
    • G01M3/183—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for pipe joints or seals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2033/00—Use of polymers of unsaturated acids or derivatives thereof as moulding material
    • B29K2033/04—Polymers of esters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/0002—Condition, form or state of moulded material or of the material to be shaped monomers or prepolymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/24—Condition, form or state of moulded material or of the material to be shaped crosslinked or vulcanised
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F2810/00—Chemical modification of a polymer
    • C08F2810/20—Chemical modification of a polymer leading to a crosslinking, either explicitly or inherently

Definitions

  • the present invention relates to a sealing body manufacturing method and a sealing body. More specifically, a method for manufacturing an endless (or ring-shaped) seal that has a self-healing function and can be manufactured without the need for a molding process using a molding die, and can be manufactured using this manufacturing method. related to the seal body.
  • a sealed structure can be constructed to regulate the flow of fluids or the like between them.
  • the sealing body is mainly made of a rubber-like elastic material such as elastically deformable hard rubber. After hardening by cooling or the like in the molding die, it is mainly manufactured by removing the mold from the cavity of the molding die (see, for example, Patent Document 1).
  • the sealing body thus obtained has elastic force and repulsive force due to the rubber-like elastic material of the raw material, thereby making it possible to seal between the two members.
  • many sealing bodies having an annular shape in other words, having an endless shape, such as the above-described O-ring, are manufactured.
  • Patent Document 1 discloses an O-ring molding die for forming an annular O-ring.
  • a pair of molds upper and lower molds
  • the flat annular O-ring vulcanization molding space is formed with the molds clamped.
  • Configurable annular molding recesses are provided in the molding surfaces of the upper and lower molds, respectively.
  • a molding die for example, a molding die
  • a processing step for providing such a mounting groove is required.
  • the sealing structure is constructed using the reaction force of the sealing body, etc., depending on the size and shape of the sealing body, there is a possibility that a load may be applied to the housing itself. There is a possibility that problems such as deformation of the groove may occur.
  • the sealing body and the sealing device as described above, the solid sealing body is mainly exemplified and explained, but the sealing body is not limited to this.
  • a sealing structure is also constructed using a so-called liquid gasket.
  • An object of the present invention is to provide a sealing body manufacturing method for manufacturing a shaped (annular) sealing body, and a sealing body manufactured using the manufacturing method.
  • the cross-linking agent is added so that the molar equivalent of the cross-linking agent to the halogen group of the halogen group-containing monomer contained in the compound is in the range of 0.2 to 4.0.
  • the strip forming step includes a mill kneading step using a mill kneader that kneads the mixture using rotor blades, and a mill kneaded product obtained by the mill kneading step between a plurality of rolls.
  • the kneading conditions of the kneading step are as follows: the rotation speed of the rotor blades of the mill kneading machine for performing the mill kneading step is in the range of 5 rpm to 20 rpm, the kneading temperature is in the range of 30°C to 70°C, and the kneading time is in the range of 30 minutes to 60 minutes, the rotation speed of the rolls of the roll kneading machine for performing the roll kneading process is in the range of 7 rpm to 20 rpm, the kneading temperature is in the range of 30 ° C. to 80 ° C., and the kneading time is The method for manufacturing a seal body according to the above [3], which is in the range of 10 minutes to 30 minutes.
  • the belt-shaped body forming step includes a pressurizing step of applying pressure using a press, and the pressurizing conditions of the pressurizing step are such that the pressurizing pressure of the press is in the range of 95 to 105 kgf/cm 2 .
  • the pressurization temperature is 150 ° C.
  • the pressurization time is 1 hour
  • the thickness of the pressurized body after pressurization is adjusted to a thickness of 2 mm.
  • a manufacturing method of the seal body is
  • the crimping step further includes a crimping heating step of heating at 100° C. for 24 hours in the atmosphere after crimping the one end and the other end of the belt-shaped body.
  • the sealing body according to any one of [7] to [9], which has an adhesive strength to acrylonitrile-butadiene rubber of 0.30 N/mm or more and 0.70 N/mm or less.
  • one end and the other end of the strip formed by the strip forming step using a compound such as acrylic rubber containing a halogen group-containing monomer as the main raw material are By crimping, it is possible to form an endless seal body. As a result, it is possible to easily form an endless (annular) seal body without using a conventional molding die and at a reduced manufacturing cost. Furthermore, the obtained sealing body has a self-repairing function, so that it exhibits excellent mountability and does not apply an excessive load to the housing.
  • FIG. 3 is an explanatory diagram schematically showing the flow of the method for manufacturing a seal body according to one embodiment of the present invention
  • FIG. 4 is an explanatory view showing schematic configurations of (a) a pressurizing body, (b) a belt-like body, (c) crimping of ends of the belt-like body, and an endless sealing body.
  • BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing which shows schematic structure of (a) test piece of a tension test, (b) test cut piece, and (c) measurement sample for self-healing function evaluation.
  • FIG. 2 is an explanatory diagram showing a schematic configuration of adjustment of an evaluation measurement sample for evaluation of adhesiveness/releasability. It is an explanatory view showing a schematic structure of a submersion test jig.
  • FIG. 2 is an explanatory diagram showing a schematic configuration of a water resistance measurement sample;
  • a method 1 for producing a seal body according to an embodiment of the present invention as shown in FIGS. a band-shaped body forming step of adding a cross-linking agent 3 to the compound 2 and forming a band-shaped body 7 from the resulting mixture 4; and a crimping step S5 for crimping the ends 7b of each other to form an endless seal body 8.
  • FIG. 1 A method 1 for producing a seal body according to an embodiment of the present invention, as shown in FIGS. a band-shaped body forming step of adding a cross-linking agent 3 to the compound 2 and forming a band-shaped body 7 from the resulting mixture 4; and a crimping step S5 for crimping the ends 7b of each other to form an endless seal body 8.
  • the compound 2, which is the main raw material of the seal body 8 is composed of, for example, an acrylic monomer-derived structural unit derived from an acrylic monomer (acrylic monomer-derived structural unit) and a halogen group-containing monomer derived from a halogen group-containing monomer. units (constitutional units derived from halogen group-containing monomers), and an acrylic rubber or the like composed of these constitutional units as repeating units can be used. Furthermore, as acrylic monomers (acrylic monomer-derived structural units), for example, ethyl acrylate, butyl acrylate, methoxyethyl acrylate, etc.
  • halogen group-containing monomers for example, 2-chloroethyl vinyl monomers such as 2-chloroethyl vinyl ether can be used.
  • a fluorine group, a butyl group, an iodine group, or the like may be used in addition to the chlorine group described above.
  • the belt-shaped body forming step in the method 1 for manufacturing the seal body of the present embodiment includes adding a predetermined amount of the cross-linking agent 3 to the compound 2, which is the main raw material containing the above-mentioned halogen group-containing monomer.
  • a cross-linking agent addition step S1 in which the acrylic rubber 2 and the cross-linking agent 3 are uniformly mixed using a stirrer or the like (not shown) to form a mixture 4 is included.
  • the cross-linking agent 3 for example, an imidazole compound such as 1-butylimidazole can be added and used. That is, any cross-linking agent 3 may be used as long as it is added to the compound 2 such as acrylic rubber, can be mixed uniformly, and is capable of promoting a cross-linking reaction with the compound 2 .
  • the amount of the cross-linking agent 3 added to the compound 2 in the cross-linking agent addition step S1 can be defined based on the following. That is, the molar equivalent amount of the cross-linking agent 3 can be in the range of 0.2 to 4.0 with respect to the halogen group of the halogen group-containing monomer contained in the acrylic rubber 2 .
  • the amount of the cross-linking agent 3 added can be in the range of 0.8 mol % to 4.2 mol % with respect to the amount of the acrylic rubber 2 added.
  • the compound 2 can promote a good cross-linking reaction.
  • the belt-shaped body forming step in the manufacturing method 1 of the seal member of the present embodiment is obtained by adding a specified amount of the cross-linking agent 3 in the cross-linking agent addition step S1, stirring it with the acrylic rubber 2, and mixing it uniformly. It includes a kneading step S2 for further kneading the mixture 4 obtained.
  • the kneading step S2 can be performed using a well-known kneader, is not particularly limited, and kneads the mixture 4 to adjust to a predetermined viscosity.
  • a mill kneader (not shown) that kneads the mixture 4 by rotating the rotor blades using rotor blades connected to a drive motor, or a roll kneader that kneads the mixture 4 between a plurality of rolls.
  • a machine (not shown) or the like can be used.
  • the kneading step S2 can be carried out in a two-step process using the mill kneader and the roll kneader described above as kneaders.
  • the mixture 4 obtained in the cross-linking agent addition step S1 is used as the first step, and the mill kneading step S2a in which the mill kneading machine is used as the kneader and the mill kneading step S2a.
  • a roll kneading step S2b in which the material 5a is used as the second step and further kneaded using a roll kneader as a kneader can be performed.
  • the kneading step S2 is not limited to the above, and only one of the mill kneading step S2a and the roll kneading step S2b, or the roll kneading step S2b is performed before the mill kneading step S2a. I don't mind.
  • the kneading conditions for the mixture 4 in the kneading step S2 are not particularly limited. ° C. to 70 ° C., and the kneading time is in the range of 30 minutes to 60 minutes, or the rotation speed of the rolls in the roll kneading machine that performs the roll kneading step S2b is in the range of 7 rpm to 20 rpm, and the kneading temperature is 30 ° C. to 80. °C range and the kneading time can be in the range of 10 minutes to 30 minutes.
  • the mixture 4 sent to the kneading step S2 has appropriate viscosity and fluidity for carrying out the next step. It is adjusted to a substance having a property of
  • the belt-shaped body forming step in the seal body manufacturing method 1 of the present embodiment includes a pressurizing step S3 in which the kneaded material 5 obtained in the kneading step S2 is pressurized using a press.
  • the pressurization step S3 can use a well-known press machine, and by applying pressure while heating at a predetermined pressurization pressure, for example, the lumpy kneaded material sent from the kneading step S2 5 can be formed into a shape of a thin plate-like pressurizing body 6 that is thinly stretched so as to have a predetermined thickness (see FIG. 2(a)).
  • FIG. 2A although what was cut in a substantially square shape is shown, it is not limited to this.
  • the pressing conditions of the pressing machine in the pressing step S3 are not particularly limited, but for example, press pressure: 95 to 105 kgf/cm 2 , press temperature: 150° C., press time: 1 hour, etc.
  • press pressure 95 to 105 kgf/cm 2
  • press temperature 150° C.
  • press time 1 hour
  • the belt-shaped body forming step in the sealing body manufacturing method 1 of the present embodiment is a thin plate-shaped body that is pressed to have a uniform thickness t (for example, 2 mm thickness) in the pressing step S3. It comprises a cutting step S4 for further cutting the body 6 into strips 7 (see FIG. 2(b)).
  • the cutting step S4 is not particularly limited as long as the thin plate-like pressure body 6 can be cut into strips 7 having a predetermined width (in other words, an elongated form).
  • it may be formed by cutting using a known cutting means (cutter) or the like, or by punching using a mold that matches the shape of the belt-like body 7 .
  • the elongated (or strip-shaped) belt-like body 7 having a predetermined width having longitudinal and lateral directions can be finally obtained.
  • the cutting step S4 forms the strip 7 having a pair of ends 7a and 7b.
  • the manufacturing method 1 of the seal body of the present embodiment further includes a crimping step of crimping one end 7a and the other end 7b of the belt-shaped body 7 having a predetermined width formed through the belt-shaped body forming step. (See FIG. 2(c)). As a result, one end portion 7a and the other end portion 7b of the band-shaped body 7 having ends described above are crimped to each other to be integrated, and the ends 7a and 7b disappear to form an endless (annular) shape. A seal body 8 is formed (see FIG. 2(d)).
  • the strip 7 is deformed in a predetermined direction (arrow direction in FIG. 2(c)) so that one end 7a and the other end 7b of the strip 7 are brought close to each other, Crimping is performed in such a deformed state.
  • the belt-shaped body 7 is mainly made of the compound 2 such as acrylic rubber that has undergone the kneading step S2 and the pressing step S3 included in the belt-shaped body forming process, and is freely deformable as described above. It has properties.
  • one end 7a and the other end 7b of the belt-shaped body 7 are further crimped to each other, then held and heated at a temperature of 100° C. for 24 hours in the atmosphere. It can include a pressure-bonding heating step. As a result, the cross-linking reaction of the compound 2 constituting the strip 7 proceeds, and the end portions 7a and 7b are integrated with each other, whereby the endless sealing member 8 can be obtained.
  • the manufacturing method 1 of the seal body of the present embodiment uses the compound 2 such as acrylic rubber containing a halogen group-containing monomer as a structural unit as a main raw material, and after molding into a belt shape, each The end portions 7a and 7b can be joined together to form an annular (endless) seal body 8 utilizing the self-repairing function. Therefore, it is possible to reduce the manufacturing cost for such a molding die without requiring a molding die as in the case of manufacturing a conventional seal body. In addition, an excessive burden is not applied to the side of the housing on which the sealing member 8 is mounted, and a processing step for forming grooves or the like in the housing can be omitted.
  • the sealing body 8 itself is a solid material, it does not flow out from the mounting site after being mounted on the housing, making it easier to handle than liquid gaskets, as compared with liquid gaskets that have been used in the past. has the advantage of In addition, it can be attached to the housing in a shorter time than the liquid gasket, and can be easily removed even after attachment.
  • the seal body 8 manufactured by the seal body manufacturing method 1 of the present embodiment has the following characteristics. That is, the self-healing rate (details will be described later) is 50% or more, the adhesive strength to acrylonitrile-butadiene rubber (NBR) is 0.30 N / mm or more and 0.70 N / mm or less, and the adhesive strength to nylon is 0.30 N/mm or more and 0.50 N/mm or less, adhesion to aluminum of 0.10 N/mm or more and 0.40 N/mm or less, and reaction force at 40% shrinkage of 200 N or less . Furthermore, it has water resistance equivalent to IPX7.
  • NBR acrylonitrile-butadiene rubber
  • the sealing bodies of Examples 1 to 9 and Comparative Examples 1 and 2 are mainly made of the acrylic rubber (corresponding to the compound in the present invention) shown in Table 1 below, and a cross-linking agent is added to the acrylic rubber. was added, and kneading, pressing, and cutting steps included in the band forming step were performed.
  • the thin plate-shaped pressurizing bodies that had undergone the pressurizing step were cut into predetermined shapes and sizes, and samples for evaluation were prepared. is being created. Therefore, the shape of the endless seal body formed in the pressure-bonding step and the pressure-bonding heating step in the method of manufacturing the seal body may be different from the shape of the sample for evaluation.
  • a chlorine group type acrylic rubber (Noxtite A-1095: manufactured by Unimatec Co., Ltd.) is used as the acrylic rubber containing a halogen group-containing monomer, and as a cross-linking agent in Examples 1 to 9 and Comparative Example 1 1-Butylimidazole (manufactured by Tokyo Kasei Co., Ltd.) is used.
  • a cross-linking agent of Comparative Example 2 hydrotalcite (DHT-4A: Kyowa Chemical Industry Co., Ltd., cross-linking agent a) and hexamethylenediamine carbamate (Cheminox AC6-66: Unimatec Co., Ltd., cross-linking agent b) were used. I am using
  • cross-linking agent addition step The amount of the cross-linking agent added to the acrylic rubber was, in the case of Example 1, 1.0 parts by weight of the 1-butylimidazole cross-linking agent per 100 parts by weight of the acrylic rubber, as shown in Table 1 above. added. In this case, the molar equivalent amount of the cross-linking agent is 0.2 with respect to the halogen group of the halogen group-containing monomer. These were uniformly mixed using a stirrer or the like to obtain a mixture of Example 1.
  • Example 3 1.6 parts by weight of the cross-linking agent (in terms of molar equivalent: 0.3) and 1 part of the cross-linking agent in Example 3 are used for 100 parts by weight of the acrylic rubber. .9 parts by weight (converted to molar equivalent: 0.37), Example 4 was 2.1 parts by weight (converted to molar equivalent: 0.4), Example 5 was 2.6 parts by weight (converted to molar equivalent: 0.5), Example 6 is 5.2 parts by weight (molar equivalent conversion: 1.0), Example 7 is 10.3 parts by weight (molar equivalent conversion: 2.0), Example 8 is 15 parts by weight .5 parts by weight (converted to molar equivalent: 3.0), and Example 9 added 20.6 parts by weight (converted to molar equivalent: 4.0), respectively, and uniformly mixed Examples 2 to A mixture of 9 was obtained.
  • a mixture of Comparative Example 1 was obtained by adding 0.5 parts by weight (0.1 in terms of molar equivalent) of a cross-linking agent to 100 parts by weight of acrylic rubber and uniformly mixing them. Further, in Comparative Example 2, 3 parts by weight of hydrotalcite and 1 part by weight of hexamethylenediamine carbamate as cross-linking agents were added to 100 parts by weight of acrylic rubber and uniformly mixed to obtain the mixture of Comparative Example 2. Obtained.
  • the mill-kneaded material obtained by the mill-kneading step was kneaded using a roll kneader (LABORATORY MILL: manufactured by Kansai Roll Co., Ltd.).
  • the kneading conditions were adjusted so that the rotation speed of the rolls was 10 rpm, the temperature during kneading was in the range of 30 to 60° C., and kneading was carried out for 30 minutes.
  • the addition amount of the cross-linking agent added to 100 parts by weight of the acrylic rubber deviates from the right scope of the seal body manufacturing method of the present invention is 0.5 parts by weight (0.1 in terms of molar equivalent).
  • the seal body itself it was difficult to form the seal body itself, and the test piece 9 itself shown in FIG. .
  • Comparative Example 2 it was possible to form a sealing body.
  • Self-healing rate (%) [tensile strength of measurement sample for evaluation (N)] ⁇ [tensile strength of comparison sample (N)] ⁇ 100
  • Examples 1 to 9 show a self-repair rate of at least 30% or more with respect to the tensile strength of the comparative sample, and particularly Examples 1 to 5 have a high self-repair rate of 65% or more. It was confirmed that On the other hand, in Comparative Example 2, the self-healing rate was 21.8%, which was a low value compared to Examples 1 to 9 and the like. Therefore, it is assumed that the measurement sample of Comparative Example 2 cannot exhibit high sealing performance. In Comparative Example 1, the self-repair rate was not evaluated because the formation of the sealing body itself was not possible.
  • the seal body manufactured by the method for manufacturing the seal body of the present invention has an excellent self-repair rate. Therefore, after cutting to a predetermined size, by performing a crimping step (or crimping heating step) in which one end and the other end are crimped and heated, the ends are integrated and sufficient strength is obtained. It was confirmed that Therefore, it can be used as a sealing body, and can exhibit high sealing performance, in other words, sufficient sealing performance.
  • plate-like bodies 13 a made of different materials are placed respectively, and only the upper surface of the range facing the adhesive portion 14 of the evaluation measurement sample 12 is exposed, and the other upper surface is covered with a fluororesin sheet 15 .
  • the 18 mm ⁇ 18 mm adhesive portion 14 of the evaluation measurement sample 12 is superimposed on the position of the exposed portion 16 of the plate-like body 13 a of a different material that is not covered with the fluororesin sheet 15 , and the adhesive portion 14 A stainless steel plate 17 adjusted to a size of 18 mm ⁇ 18 mm is placed from above.
  • a 3.3 kg weight 18 is placed on the stainless steel plate 17 so that the load (pressure) of the weight 18 is applied only to the adhesive portion 14 (see FIG. 4).
  • a stacked body is formed by stacking the plate-like bodies 13 a made of different materials from the bottom, the fluororesin sheet 15 , the evaluation measurement sample 12 , the stainless steel plate 17 , and the weight 18 .
  • the adhesive portion 14 of the sample 18 and the exposed portion 16 such as the plate-like body 13a made of a different material are in close contact with each other.
  • the sheet While maintaining such a tight contact state, the sheet is placed in an oven (not shown) and heated at a heating temperature of 100°C under atmospheric pressure for 24 hours. After 24 hours have passed, it is taken out from the oven, and the adhesiveness and peelability of the evaluation measurement sample 12 to the plate-shaped body 13a of a different material in the adhesive portion 14 and the exposed portion 16 are evaluated by a peel strength test.
  • Peel strength tester LTS-200N-S100 (manufactured by Minebea Co., Ltd.) Tensile strength: 50mm/min Temperature: Room temperature Peeling angle: 90°
  • Examples 1 to 9 have high peel strength values that are approximately the same (only Example 9) or higher than the peel strength values with NBR, nylon, and aluminum of Comparative Example 2. It was confirmed that the value In particular, when aluminum was used as the plate member 13c made of a different material, a remarkable increase in the peel strength compared to Comparative Example 2 was observed.
  • the sealing body manufactured by the sealing body manufacturing method of the present invention has high peel strength against different materials. That is, it was shown that all of them exhibited high strength compared to the peel strength of Comparative Example 2 against different materials such as NBR, nylon, and aluminum. Therefore, it can be used as a sealing body, and can exhibit high sealing performance, in other words, sufficient sealing performance.
  • Water resistance measurement sample 20 consisting of a water immersion test jig 19 shown in FIG. 5 and an endless seal body shown in FIG. ) was used to evaluate water resistance. More specifically, the submersion test jig 19 for evaluating water resistance is configured by combining a vertical pipe 21 and a horizontal pipe 22, and the pipe water depth H is adjusted to 1 m. bottom. An acrylic columnar member 23a and a SUS columnar member 23b are placed on the upper side and the water resistance measurement sample 20 is sandwiched between the acrylic columnar member 23a and the SUS columnar member 23b so that the compression ratio is adjusted to 10%. The sample 24 formed in 1 was left at rest on the pipe bottom portion 26 of the pipe inner space 25, and the still state was maintained for 30 minutes.
  • the water resistance measurement sample 20 exhibits an endless shape having a crimped connecting portion 27, and the inner space (annular space) surrounded by the water resistance measurement sample 20 has , a water leak detection seal 28 capable of detecting a water leak by contact with water is arranged.
  • 6 shows a top view of the water resistance measurement sample 20 with the acrylic cylindrical member 23a removed.
  • the water resistance measurement sample 20 was taken out from the water immersion test jig 19, and the presence or absence of water leakage to the water leakage detection seal 28 was visually confirmed. was done.
  • the method for manufacturing a seal body and the seal body of the present invention have industrial applicability in industrial fields using various machine parts using the seal body.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Sealing Material Composition (AREA)
  • Gasket Seals (AREA)
PCT/JP2022/028911 2021-08-25 2022-07-27 シール体の製造方法、及びシール体 Ceased WO2023026752A1 (ja)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CN202280057253.5A CN117836543A (zh) 2021-08-25 2022-07-27 密封体的制造方法及密封体
JP2023543759A JP7625708B2 (ja) 2021-08-25 2022-07-27 シール体の製造方法、及びシール体
EP22861043.2A EP4394212A4 (en) 2021-08-25 2022-07-27 METHOD FOR MANUFACTURING A SEALING BODY, AND SEALING BODY
US18/290,654 US20250084288A1 (en) 2021-08-25 2022-07-27 Method for manufacturing seal body, and seal body
JP2024204338A JP2025019213A (ja) 2021-08-25 2024-11-25 シール体

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JP2021137103 2021-08-25
JP2021-137103 2021-08-25

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002212341A (ja) * 2000-11-14 2002-07-31 Nsk Ltd ゴム材料組成物
JP2002264004A (ja) 2001-03-08 2002-09-18 Fujikura Rubber Ltd Ｏリング成形用金型の研磨方法及び研磨装置
JP2007051257A (ja) * 2005-08-19 2007-03-01 Japan Gore Tex Inc シール材及びその製造方法
JP2013163807A (ja) * 2012-01-12 2013-08-22 Daikin Industries Ltd アクリルゴム組成物、アクリルゴム成形品及びその製造方法
JP2015520052A (ja) * 2012-05-23 2015-07-16 サン−ゴバン パフォーマンス プラスティックス コーポレイション 大口径熱可塑性シールの形成方法
WO2021065669A1 (ja) * 2019-09-30 2021-04-08 デンカ株式会社 アクリルゴム、架橋性ゴム組成物及びゴム硬化物

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002212341A (ja) * 2000-11-14 2002-07-31 Nsk Ltd ゴム材料組成物
JP2002264004A (ja) 2001-03-08 2002-09-18 Fujikura Rubber Ltd Ｏリング成形用金型の研磨方法及び研磨装置
JP2007051257A (ja) * 2005-08-19 2007-03-01 Japan Gore Tex Inc シール材及びその製造方法
JP2013163807A (ja) * 2012-01-12 2013-08-22 Daikin Industries Ltd アクリルゴム組成物、アクリルゴム成形品及びその製造方法
JP2015520052A (ja) * 2012-05-23 2015-07-16 サン−ゴバン パフォーマンス プラスティックス コーポレイション 大口径熱可塑性シールの形成方法
WO2021065669A1 (ja) * 2019-09-30 2021-04-08 デンカ株式会社 アクリルゴム、架橋性ゴム組成物及びゴム硬化物

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4394212A4

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EP4394212A4 (en) 2025-09-10
EP4394212A1 (en) 2024-07-03
US20250084288A1 (en) 2025-03-13
JP7625708B2 (ja) 2025-02-03
CN117836543A (zh) 2024-04-05
JP2025019213A (ja) 2025-02-06

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