CN104204631A - Fluorine resin gasket for pipe seal - Google Patents
Fluorine resin gasket for pipe seal Download PDFInfo
- Publication number
- CN104204631A CN104204631A CN201380014769.2A CN201380014769A CN104204631A CN 104204631 A CN104204631 A CN 104204631A CN 201380014769 A CN201380014769 A CN 201380014769A CN 104204631 A CN104204631 A CN 104204631A
- Authority
- CN
- China
- Prior art keywords
- inorganic particles
- hollow inorganic
- volume
- pad
- gasket
- 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.)
- Pending
Links
- 229920005989 resin Polymers 0.000 title abstract description 10
- 239000011347 resin Substances 0.000 title abstract description 10
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 title abstract 5
- 229910052731 fluorine Inorganic materials 0.000 title abstract 5
- 239000011737 fluorine Substances 0.000 title abstract 5
- 239000010954 inorganic particle Substances 0.000 claims abstract description 82
- 238000004519 manufacturing process Methods 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 25
- 239000011342 resin composition Substances 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000013467 fragmentation Methods 0.000 claims description 35
- 238000006062 fragmentation reaction Methods 0.000 claims description 35
- 238000012856 packing Methods 0.000 claims description 22
- 230000015572 biosynthetic process Effects 0.000 abstract description 6
- 238000005096 rolling process Methods 0.000 abstract description 3
- 239000000945 filler Substances 0.000 abstract 2
- 238000011084 recovery Methods 0.000 description 23
- 230000006835 compression Effects 0.000 description 17
- 238000007906 compression Methods 0.000 description 17
- 238000000635 electron micrograph Methods 0.000 description 16
- 238000007789 sealing Methods 0.000 description 15
- 238000003490 calendering Methods 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 11
- 230000000704 physical effect Effects 0.000 description 11
- 239000002245 particle Substances 0.000 description 10
- 239000006057 Non-nutritive feed additive Substances 0.000 description 9
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 7
- 239000004810 polytetrafluoroethylene Substances 0.000 description 7
- 239000000843 powder Substances 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 239000004809 Teflon Substances 0.000 description 5
- 229920006362 Teflon® Polymers 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- CNPVJWYWYZMPDS-UHFFFAOYSA-N 2-methyldecane Chemical compound CCCCCCCCC(C)C CNPVJWYWYZMPDS-UHFFFAOYSA-N 0.000 description 3
- 238000004220 aggregation Methods 0.000 description 3
- 230000002776 aggregation Effects 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- -1 polychlorotrifluoroethylene Polymers 0.000 description 3
- 239000003566 sealing material Substances 0.000 description 3
- IANQTJSKSUMEQM-UHFFFAOYSA-N 1-benzofuran Chemical compound C1=CC=C2OC=CC2=C1 IANQTJSKSUMEQM-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 229920001780 ECTFE Polymers 0.000 description 2
- 239000002033 PVDF binder Substances 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 229920000840 ethylene tetrafluoroethylene copolymer Polymers 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920002493 poly(chlorotrifluoroethylene) Polymers 0.000 description 2
- 239000005023 polychlorotrifluoroethylene (PCTFE) polymer Substances 0.000 description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 235000012222 talc Nutrition 0.000 description 2
- KPAPHODVWOVUJL-UHFFFAOYSA-N 1-benzofuran;1h-indene Chemical compound C1=CC=C2CC=CC2=C1.C1=CC=C2OC=CC2=C1 KPAPHODVWOVUJL-UHFFFAOYSA-N 0.000 description 1
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 239000004067 bulking agent Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 229910021393 carbon nanotube Inorganic materials 0.000 description 1
- 239000002041 carbon nanotube Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000012669 compression test Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000010451 perlite Substances 0.000 description 1
- 235000019362 perlite Nutrition 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 150000003505 terpenes Chemical class 0.000 description 1
- 235000007586 terpenes Nutrition 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- 229940124543 ultraviolet light absorber Drugs 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
-
- 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
- C09K3/1009—Fluorinated polymers, e.g. PTFE
-
- 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
- F16J15/102—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing characterised by material
-
- 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
- B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
- B29K2027/12—Use of polyvinylhalogenides or derivatives thereof as moulding material containing fluorine
-
- 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
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
- B29K2105/16—Fillers
- B29K2105/165—Hollow fillers, e.g. microballoons or expanded particles
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2327/00—Characterised by the use of 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 a halogen; Derivatives of such polymers
- C08J2327/02—Characterised by the use of 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 a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2327/12—Characterised by the use of 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 a halogen; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C08J2327/18—Homopolymers or copolymers of tetrafluoroethylene
Abstract
The present invention provides the following: a fluorine resin gasket for a pipe seal, comprising a preform of a resin composition for gasket formation that includes a fluorine resin and hollow inorganic particles as a filler material, in which the hollow inorganic particles included in the preform are crushed so that the volume of the crushed hollow inorganic particles is 25-60% of the volume of the hollow inorganic particles before crushing; and a method for manufacturing a fluorine resin gasket for a pipe seal, wherein a resin composition for gasket formation that includes the fluorine resin and hollow inorganic particles as the filler material is formed into a sheet, and, by rolling the formed preform, the hollow inorganic particles contained in the preform are crushed so that the volume of the crushed hollow inorganic particles is 25-60% of the volume of the hollow inorganic particles before crushing.
Description
Technical field
The present invention relates to pipe arrangement sealing fluororesin gasket.More specifically, relate to and a kind ofly can be suitable as the pipe arrangement sealing fluororesin gasket with sealing material etc. such as the pipe arrangement in pipe arrangement joint each other.
Background technique
Generally speaking, pipe arrangement uses the pads such as fluororesin gasket, metal jacketed gasket, spirotallic gasket with sealing material.When the edge of pipe arrangement is installed and be anchored on to pad, often there is the rough situation of flange.Wherein, particularly glass lining flange was implemented sintering processing repeatedly, so the fluctuating of flange is large, so the fluctuating of this flange need to absorb with pad.In order to absorb the fluctuating of flange, pad is preferably soft sheet material, and mechanical strength reduces along with becoming soft but then.
Therefore, even if as in the situation that the fill factor of fluororesin fill factor low, packing material high also take into account heavily stressed slackness and high-air-tightness (sealability) containing the fluororesin sheet of packing material, the carbon such as graphite, carbon black that proposed to be mixed is packing material; Talcums etc. are inorganic is packing material; Resin powder; The fluororesin sheet (for example, referring to patent documentation 1) containing packing material of the packing materials such as lamination coating such as carbon fiber.
Above-mentioned fluororesin sheet has heavily stressed slackness and high-air-tightness, but compressibility is little, therefore can between flange and pad, produce gap, and the gas in pipe arrangement or liquid are likely from this clearance leakage.
Therefore, the pipe arrangement sealing fluororesin gasket of the recoverability excellence that in recent years, the compressibility of expectation while developing a kind of compression be high, revert to shape originally simultaneously.
Prior art document
Patent documentation
Patent documentation 1: TOHKEMY 2007-253519 communique
Summary of the invention
The problem that invention will solve
The present invention carries out in view of above-mentioned prior art, and the pipe arrangement of the recoverability excellence that compressibility when its problem is to provide a kind of compression is high, revert to shape is originally fluororesin gasket and manufacture method thereof for sealing.
For solving the scheme of problem
The present invention relates to:
(1) a kind of pipe arrangement sealing fluororesin gasket, it is the pad for pipe arrangement joint is each other sealed, it is by containing fluororesin and forming with the preshaped body of resin composition and form as the pad of the hollow inorganic particles of packing material, is that the mode of 25 volume %～60 volume % of the volume of the hollow inorganic particles before fragmentation has been carried out fragmentation to the hollow inorganic particles comprising in this preshaped body and formed according to the volume of the hollow inorganic particles after fragmentation; With
(2) manufacture method of fluororesin gasket for a kind of pipe arrangement sealing, it is for manufacturing the method for the pad for pipe arrangement joint is each other sealed, it is characterized in that, to contain fluororesin and form and be shaped to sheet with resin composition as the pad of the hollow inorganic particles of packing material, molded preshaped body is rolled, thereby according to the volume of the hollow inorganic particles after fragmentation, be that the mode of 25 volume %～60 volume % of volume of the hollow inorganic particles before fragmentation is broken by this hollow inorganic particles.
Invention effect
Pipe arrangement sealing of the present invention can have been given play to the effect of following excellence with fluororesin gasket: compressibility during compression is high, and shows excellent recoverability.In addition,, if utilize the manufacture method of fluororesin gasket for pipe arrangement of the present invention sealing, can give play to the effect of following excellence: compressibility in the time of can obtaining compressing is high and show the pipe arrangement sealing fluororesin gasket of excellent recoverability.
Accompanying drawing explanation
Fig. 1 is the electron micrograph in the cross section of the preshaped body that obtains in embodiments of the invention 1.
Fig. 2 is the electron micrograph in the cross section of the sheet that obtains in embodiments of the invention 1.
Fig. 3 is the electron micrograph in the cross section of the preshaped body that obtains in comparative example 1.
Fig. 4 is the electron micrograph in the cross section of the sheet that obtains in comparative example 1.
Fig. 5 is the electron micrograph in the cross section of the preshaped body that obtains in comparative example 2.
Fig. 6 is the electron micrograph in the cross section of the sheet that obtains in comparative example 2.
Fig. 7 is the electron micrograph in the cross section of the preshaped body that obtains in comparative example 3.
Fig. 8 is the electron micrograph in the cross section of the sheet that obtains in comparative example 3.
Embodiment
As mentioned above, pipe arrangement sealing of the present invention is the pad for pipe arrangement joint is each other sealed with fluororesin gasket, it is characterized in that, it is by containing fluororesin and forming with the preshaped body of resin composition and form as the pad of the hollow inorganic particles of packing material, is that the mode of 25 volume %～60 volume % of the volume of the hollow inorganic particles before fragmentation has been carried out fragmentation to the hollow inorganic particles comprising in this preshaped body according to the volume of the hollow inorganic particles after fragmentation.
Pipe arrangement of the present invention sealing for example can be manufactured as follows with fluororesin gasket: will contain fluororesin and with resin composition, be shaped to sheet as the pad formation of the hollow inorganic particles of packing material, molded preshaped body is rolled, thereby the mode of 25 volume %～60 volume % of volume that according to the volume of the hollow inorganic particles after fragmentation is the hollow inorganic particles before fragmentation is broken by this hollow inorganic particles, manufactures thus.
The pad using in the present invention forms and contains fluororesin and packing material with resin composition.
As fluororesin, can enumerate such as teflon (PTFE), tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA), tetrafluoraoethylene-hexafluoropropylene copolymer (FEP), tetrafluoroethylene-ethylene copolymer (ETFE), polyvinylidene fluoride (PVDF), polychlorotrifluoroethylene (PCTFE), chlorotrifluoroethylene-ethylene copolymer (ECTFE) etc., but the present invention is not limited only to these examples.These fluororesin all can be used separately, also can share two or more.In these fluororesin, from the viewpoint of moldability and processability, preferably polytetrafluoroethylene (PTFE).
Fluororesin can be for Powdered, or also can be for fluororesin powder being scattered in to the dispersion liquid forming in solvent.The dispersion liquid of fluororesin powder has can make packing material be easy to homodisperse advantage.
In the present invention, use hollow inorganic particles as packing material.As hollow inorganic particles, can enumerate hollow mineral grains such as Hollow Glass Sphere, hollow ceramic pearl, expanded perlite etc., but the present invention is not limited only to these examples.These hollow inorganic particles all can be used separately, also can share two or more.Among these, due to easily broken and be easy to obtain and preferred Hollow Glass Sphere.
The viewpoint of the compressibility when improving compression gasket, the Mean particle diameter of hollow inorganic particles be preferably 1 μ m above, more preferably 3 μ m above, more preferably more than 5 μ m; Though the Mean particle diameter of hollow inorganic particles is according to the thickness of pad and difference, from improving the flatness of gasket surface and improving the viewpoint of the recoverability of pad, be preferably 100 μ m following, more preferably 90 μ m following, more preferably below 80 μ m.
From improving the viewpoint of treatability, the density of hollow inorganic particles is preferably 0.1g/cm
3above; Though the density of hollow inorganic particles is according to the thickness of pad and difference, from improving the flatness of gasket surface and improving the viewpoint of the compressibility of pad, be preferably 0.3g/cm
3below.
By making hollow inorganic particles can not be broken and make this hollow inorganic particles to be easily broken when manufacturing preshaped body and while rolling preshaped body before manufacturing preshaped body, can manufacture efficiently the compressibility in when compression high and show the pad of excellent recoverability, from this viewpoint, the compressive strength of hollow inorganic particles is preferably 0.3MPa～2MPa.
The viewpoint of the compressibility during from raising compression gasket, with respect to the amount of the hollow inorganic particles of 100 mass parts fluororesin be preferably 0.5 mass parts above, more preferably 1 mass parts above, more preferably more than 2 mass parts, from improving the viewpoint of the recoverability of pad, be preferably 35 mass parts following, more preferably 30 mass parts following, more preferably below 25 mass parts.
It should be noted that, in not hindering the scope of object, the pad using in the present invention forms with comprising hollow inorganic particles other packing material in addition in resin composition.As above-mentioned other packing material, can enumerate carbon such as graphite, carbon black, active carbon, carbon nano-tube is packing material; Talcum, mica, clay, calcium carbonate, magnesium oxide etc. are inorganic is particle; The particles such as resin particle; The short fibres such as glass fibre, carbon fiber, aramid fiber, asbestos; Etc., but the present invention is not limited only to these examples.These other packing materials all can be used separately, also can share two or more.
In addition,, for fluororesin being expanded when pad formation is shaped to sheet and preshaped body is rolled with resin composition, the pad using in the present invention forms with containing processing aid in resin composition.
As processing aid, can enumerate such as petroleum hydrocarbon compounds such as alkane hydrocarbon system hydrocarbon compound etc., but the present invention is not limited only to these examples.Processing aid can commercially easily obtain.As the processing aid that can commercially easily obtain, can enumerate such as Isopar C, Isopar E, Isopar G, Isopar H, Isopar L, Isopar M[is the manufacture of Exxon Mobil Co., Ltd, trade name above] etc., but the present invention is not limited only to these examples.
The viewpoint that makes during preshaped body fluororesin appropriateness expand from calendering, is preferably 5 mass parts～50 mass parts, 10 mass parts～30 mass parts more preferably with respect to the amount of the processing aid of total amount 100 mass parts of fluororesin, hollow inorganic particles and other packing material.
It should be noted that, in not hindering the scope of object, pad forms with comprising the colorants such as appropriate tackifier such as terpene resin, terpenes-phenolic resin, coumarone resin, coumarone-indene resin, rosin, ultraviolet light absorber, antioxidant, polymerization inhibitor, bulking agent, pigment etc. in resin composition.
Pad forms and can be prepared as follows with resin composition: by disposable mixing in any order such as fluororesin, hollow inorganic particles, other packing material as required, processing aid, additives, or mix several times on a small quantity at every turn, be mixed into thus and there is uniform composition, thereby prepare this pad formation resin composition.It should be noted that, in order to obtain having the pad formation resin composition of uniform composition, can form with excessively adding processing aid in resin composition at pad, fully stir, then by means such as filtration, volatilization, remove excessive processing aid.
As mentioned above, pipe arrangement sealing of the present invention for example can be manufactured as follows with fluororesin gasket: pad is formed and is shaped to sheet with resin composition, molded preshaped body is rolled, thereby the mode of 25 volume %～60 volume % of volume that according to the volume of the hollow inorganic particles after fragmentation is the hollow inorganic particles before fragmentation is broken by the hollow inorganic particles comprising in this preshaped body, can manufacture thus this pipe arrangement sealing fluororesin gasket.
As formed the method for manufacturing the preshaped body of sheet with resin composition by pad, can enumerate for example by pad being formed to the method for manufacturing the preshaped body of sheet with resin composition extruding and moulding; By pulverous pad being formed to the method for manufacturing the preshaped body of sheet with resin composition compre sion molding; Etc., but the present invention is not limited only to these examples.Compressibility when manufacturing efficiently compression is high and show the viewpoint of the pad of excellent recoverability, and the thickness of preshaped body is preferably the degree of 5～10 times of the thickness of target pad.
Then, molded preshaped body is rolled.The calendering of preshaped body is such as utilizing two rollers etc. to carry out.Rolling condition while utilizing two rollers to roll preshaped body is such as preferably suitably determining according to the thickness of the kind of hollow inorganic particles, target pad etc.Line pressure while utilizing two rollers to roll preshaped body is selected the needed pressure of broken hollow inorganic particles, is conventionally preferably 5kN/m～20kN/m.Roll temperature to two rollers is not particularly limited, and can be room temperature, also can heat as required or cooling.
When utilizing two rollers to roll preshaped body, from making the viewpoint of preshaped body densification, preferably repeat twice above this calendering.It should be noted that, repeating calendering in the situation that, by repeat this calendering at every turn, all dwindle the interval of roller, thus the thickness of attenuate preshaped body gradually.The interval of the roller while utilizing two rollers to roll preshaped body is according to the thickness of pad and difference, thereby can not unify to determine, is generally the degree of 0.5mm～30mm, and roller speed is preferably 3m/ minute～degree of 10m/ minute.
By as above preshaped body being rolled, can the hollow inorganic particles comprising in preshaped body is broken.
In the present invention, by pad, formed the preshaped body of manufacturing sheet with resin composition, and when preshaped body is rolled, the mode of 25 volume %～60 volume % of volume that according to the volume of the hollow inorganic particles after fragmentation is the hollow inorganic particles before fragmentation is broken by the hollow inorganic particles comprising in preshaped body, and this point is one of notable feature of the present invention.
In the present invention, the hollow inorganic particles comprising in preshaped body is by so broken, thereby the hollow inorganic particles after fragmentation is not scattered in preshaped body, the fragment that hollow inorganic particles fragmentation forms (is that fluororesin forms sea with state of aggregation, broken hollow inorganic particles forms the what is called " sea-island structure " on island) exist, and not that hollow inorganic particles is fully broken, but according to the volume of the hollow inorganic particles after fragmentation, be that the mode of 25 volume %～60 volume % of the volume of the hollow inorganic particles before fragmentation is carried out fragmentation to the hollow inorganic particles comprising in this preshaped body, therefore, it is high and show the excellent effect of excellent recoverability that pad of the present invention can have been given play to the compressibility in when compression.From showing the viewpoint of excellent recoverability, the volume of the hollow inorganic particles after fragmentation is more than 25 volume %, from improving the viewpoint of compressibility, is below 60 volume %.The line pressure when volume of the hollow inorganic particles after fragmentation can roll preshaped body by adjustment, the interval of roller etc. and easily regulate.
It should be noted that, in the present invention, the volume of the hollow inorganic particles after fragmentation can utilize following methods to obtain.
That is, for example, in the situation that preshaped body consists of fluororesin and hollow inorganic particles, the ratio of the fluororesin that is α by density (mass ratio) is made as X, and the ratio of the hollow inorganic particles that is β by density (mass ratio) is made as 1-X.If the total amount of fluororesin and hollow inorganic particles is made as to A, the quality of fluororesin is AX, and volume is AX/ α.If the ratio of the volume of the hollow inorganic particles by the volume of the hollow inorganic particles after fragmentation before with respect to fragmentation is made as γ, the quality of hollow inorganic particles is A (1-X), and its volume is A γ (1-X)/β.Therefore, in preshaped body, the whole volume of fluororesin and hollow inorganic particles is AX/ α+A γ (1-X)/β.Thus, in preshaped body, the whole density of fluororesin and hollow inorganic particles is 1/[X/ α+γ (1-X)/β], thus can by the quality of preshaped body and the quality of volume and pad and volume obtain broken after the ratio of volume of the volume of the hollow inorganic particles hollow inorganic particles before with respect to fragmentation.
The sheet obtaining for as mentioned above preshaped body being rolled, can place as required at normal temperatures, or suitable heating, thereby the volatilizations such as processing aid that comprise in pad are removed.
In addition, above-mentioned can be heated and be fired by the temperature more than fusing point with fluororesin.Heating-up temperature is according to the kind of fluororesin and difference, thereby can not unify to determine, from the viewpoint of equably sheet integral body being fired and the viewpoint of avoiding the decomposition of fluororesin, is conventionally preferably the degree of 340 ℃～370 ℃.
Obtain as above firing the sheet forming, the state that this sheet can be usingd is originally used as pad, or as pad, uses after also can cutting into desired shape.
Pad of the present invention is by containing fluororesin and forming with the preshaped body of resin composition and form as the pad of the hollow inorganic particles of packing material, the mode of 25 volume %～60 volume % that according to the volume of the hollow inorganic particles after fragmentation is the volume of the hollow inorganic particles before fragmentation has been carried out fragmentation to the hollow inorganic particles comprising in this preshaped body, thereby the compressibility can give play to compression time is high and show the excellent effect of excellent recoverability.Therefore, pad of the present invention can be suitable as such as sealing material etc. for the pipe arrangement in pipe arrangement joint each other.
Embodiment
Next, based on embodiment, further describe the present invention, but the present invention is not limited only to described embodiment.
Embodiment 1
By teflon (PTFE) fine powder [Daikin Ind Ltd's manufacture, production code member: F104] 1215g, Hollow Glass Sphere [Potters-Ballotini Co., Ltd. manufacture, production code member: CMC-20, Mean particle diameter: 60 μ m, relative density: 0.25, compressive strength: 0.7MPa] 135g and hydrocarbon system organic solvent [Exxon Mobil Co., Ltd manufactures, trade name: Isopar G] 250g mix after 5 minutes with dispersion kneader, the extruder that is of a size of 300mm * 20mm with the opening portion of mould is extruded, and produces preshaped body.
Then, for preshaped body obtained above, line pressure during by calendering is adjusted into 10kN/m, roller speed is adjusted into 6m/ minute, the temperature of roller is adjusted into room temperature (approximately 25 ℃), make it successively by two rollers (interval of the diameter of roller: 700mm, roller: 20mm), two roller (interval of the diameter of roller: 700mm, roller: 10mm), two roller (interval of the diameter of roller: 700mm, roller: 5mm) and two rollers (interval of the diameter of roller: 700mm, roller: 3mm), thereby produce the sheet that thickness is 3mm.
This sheet obtained above is placed 24 hours in the atmosphere of room temperature (approximately 25 ℃), thereby the solvent evaporates comprising in sheet is removed, afterwards this sheet is put into electric furnace, at 350 ℃, fire 3 hours, obtain thus the gasket sheet (ratio in the space in pearl: 0.45) that thickness is 3mm.
The electron micrograph in the cross section of gasket sheet obtained above is shown in to Fig. 1.It should be noted that, in Fig. 1, the scale of photo (200 μ m) is shown in the lower right (identical in following figure) of this photo.As shown in Figure 1, known Hollow Glass Sphere is broken with state of aggregation.
Then,, as the physical property of gasket sheet obtained above, based on following methods, leakage rate, decrement (compressibility), recovery amount and density are investigated.Its result, the leakage rate of this gasket sheet is 6.0 * 10
-5pam
3/ s, decrement are that 0.87mm, recovery amount are that 0.38mm, density are 1710kg/m
3.In addition the compressibility of obtaining based on above-mentioned decrement, is 29%.
(1) decrement and recovery amount
According to JIS R3453, measure.
(2) density
According to JIS K6888, measure.
(3) tightness
The pad test film that is die-cut into internal diameter 48mm, external diameter 67mm size is arranged on to diameter 100mm, height 50mm, surface roughness R
maxbetween the steel flange of 12 μ m, utilize compression test to take the mode that surface pressure is 19.6MPa and load load.With nitrogen, from being arranged at the pressure importing of flange, give the pressure of 0.98MPa with through hole to the internal side diameter of pad test film, sealing load imports pipe arrangement, keeps this state 1 hour.With the pressure that pressure transducer reads before and after keeping, change, by pressure decreased amount, obtain leakage rate.
Then, simulate the actual use of gasket sheet obtained above, with fastening surface, press after 35MPa compression, carry out release.The electron micrograph in the cross section of the pad after compression is shown in to Fig. 2.Known as shown in Figure 2, the cross section of the gasket sheet shown in Hollow Glass Sphere and Fig. 1 is same, and the gap after being broken with state of aggregation of Hollow Glass Sphere is not destroyed.
Embodiment 2
In embodiment 1, the line pressure of roll-in time delay is changed to 20kN/m by 10kN/m, obtain similarly to Example 1 in addition gasket sheet (the ratio in the space in pearl: 0.27) that thickness is 3mm.
Then,, as the physical property of gasket sheet obtained above, leakage rate, decrement (compressibility), recovery amount and density have been investigated similarly to Example 1.Its result, the leakage rate of this gasket sheet is 4.0 * 10
-5pam
3/ s, decrement are that 0.76mm, compressibility are 25%, recovery amount is that 0.35mm, density are 1940kg/m
3.
Embodiment 3
In embodiment 1, the line pressure of roll-in time delay is changed to 5kN/m by 10kN/m, obtain similarly to Example 1 in addition gasket sheet (the ratio in the space in pearl: 0.58) that thickness is 3mm.
Then,, as the physical property of gasket sheet obtained above, leakage rate, decrement (compressibility), recovery amount and density have been investigated similarly to Example 1.Its result, the leakage rate of this gasket sheet is 8.0 * 10
-5pam
3/ s, decrement are that 0.91mm, compressibility are 30%, recovery amount is that 0.43mm, density are 1560kg/m
3.
Embodiment 4
In embodiment 1, the amount of teflon (PTFE) fine powder is changed to 1013g by 1215g, the amount of Hollow Glass Sphere is changed to 337g by 135g, obtain similarly to Example 1 in addition gasket sheet (the ratio in the space in pearl: 0.40) that thickness is 3mm.
Then,, as the physical property of gasket sheet obtained above, leakage rate, decrement (compressibility), recovery amount and density have been investigated similarly to Example 1.Its result, the leakage rate of this gasket sheet is 8.0 * 10
-5pam
3/ s, decrement are that 1.30mm, compressibility are 43%, recovery amount is that 0.55mm, density are 1350kg/m
3.
Embodiment 5
In embodiment 1, the amount of teflon (PTFE) fine powder is changed to 1283g by 1215g, the amount of Hollow Glass Sphere is changed to 67g by 135g, obtain similarly to Example 1 in addition gasket sheet (the ratio in the space in pearl: 0.53) that thickness is 3mm.
Then,, as the physical property of gasket sheet obtained above, leakage rate, decrement (compressibility), recovery amount and density have been investigated similarly to Example 1.Its result, the leakage rate of this gasket sheet is 2.0 * 10
-5pam
3/ s, decrement are that 0.72mm, compressibility are 24%, recovery amount is that 0.33mm, density are 1860kg/m
3.
Embodiment 6
For the sheet obtaining in embodiment 1, and then the line pressure in when calendering is adjusted into 10kN/m, roller speed is adjusted into 6m/ minute, the temperature of roller is adjusted into room temperature (approximately 25 ℃), make it pass through two rollers (interval of the diameter of roller: 700mm, roller: 1.5mm), thereby obtain the gasket sheet (ratio in the space in pearl: 0.41) that thickness is 1.5mm.
Then,, as the physical property of gasket sheet obtained above, leakage rate, decrement (compressibility), recovery amount and density have been investigated similarly to Example 1.Its result, the leakage rate of this gasket sheet is 2.0 * 10
-5pam
3/ s, decrement are that 0.45mm, compressibility are 30%, recovery amount is that 0.18mm, density are 1750kg/m
3.
Comparative example 1
In embodiment 1, to use Hollow Glass Sphere [Potters-Ballotini Co., Ltd. manufacture, production code member: CMC-20, Mean particle diameter: 60 μ m, relative density: 0.25, compressive strength: 20MPa] 135g changes to and uses Hollow Glass Sphere [Potters-Ballotini Co., Ltd. manufacture, production code member: 34P30, Mean particle diameter: 35 μ m, relative density: 0.34] 135g, line pressure during by calendering changes to 35kN/m by 10kN/m, obtain similarly to Example 1 in addition gasket sheet (the ratio in the space in pearl: 0.68) that thickness is 3mm.
The electron micrograph in the cross section of gasket sheet obtained above is shown in to Fig. 3.As shown in Figure 3, known Hollow Glass Sphere is not broken.
Then, simulate the actual use of gasket sheet obtained above, with fastening surface, press after 35MPa compression, carry out release.The electron micrograph in the cross section of the pad after compression is shown in to Fig. 4.Known as shown in Figure 4, different from the cross section of the gasket sheet shown in Fig. 3, Hollow Glass Sphere is broken, and does not substantially have space.
Then,, as the physical property of gasket sheet obtained above, leakage rate, decrement (compressibility), recovery amount and density have been investigated similarly to Example 1.Its result, the leakage rate of this gasket sheet is 4.0 * 10
-5pam
3/ s, decrement are that 0.94mm, compressibility are 31%, recovery amount is that 0.28mm, density are 1470kg/m
3.
Comparative example 2
In embodiment 1, to use Hollow Glass Sphere [Potters-Ballotini Co., Ltd. manufacture, production code member: CMC-20, Mean particle diameter: 60 μ m, relative density: 0.25, compressive strength: 55MPa] 135g changes to and uses Hollow Glass Sphere [Potters-Ballotini Co., Ltd. manufacture, production code member: 60P18, Mean particle diameter: 18 μ m, relative density: 0.60] 135g, line pressure during by calendering changes to 35kN/m by 10kN/m, obtain similarly to Example 1 in addition gasket sheet (the ratio in the space in pearl: 0.70) that thickness is 3mm.
The electron micrograph in the cross section of gasket sheet obtained above is shown in to Fig. 5.As shown in Figure 5, known Hollow Glass Sphere is not broken.
Then, simulate the actual use of gasket sheet obtained above, with fastening surface, press after 35MPa compression, carry out release.The electron micrograph in the cross section of the pad after compression is shown in to Fig. 6.Known as shown in Figure 6, same with the cross section of the gasket sheet shown in Fig. 5, Hollow Glass Sphere is not broken substantially.
Then,, as the physical property of gasket sheet obtained above, leakage rate, decrement (compressibility), recovery amount and density have been investigated similarly to Example 1.Its result, the leakage rate of this gasket sheet is 4.0 * 10
-5pam
3/ s, decrement are that 0.47mm, compressibility are 16%, recovery amount is that 0.25mm, density are 1450kg/m
3.
Comparative example 3
In embodiment 1, the line pressure during by calendering changes to 35kN/m by 10kN/m, obtains similarly to Example 1 in addition gasket sheet (the ratio in the space in pearl: 0.20) that thickness is 3mm.
The electron micrograph in the cross section of gasket sheet obtained above is shown in to Fig. 7.Known as shown in Figure 7, Hollow Glass Sphere is broken, and in fluororesin, disperses.
Then, simulate the actual use of gasket sheet obtained above, with fastening surface, press after 35MPa compression, carry out release.The electron micrograph in the cross section of the pad after compression is shown in to Fig. 8.Known as shown in Figure 8, Hollow Glass Sphere is broken, and in fluororesin, disperses.
Then,, as the physical property of gasket sheet obtained above, leakage rate, decrement (compressibility), recovery amount and density have been investigated similarly to Example 1.Its result, the leakage rate of this gasket sheet is 2.0 * 10
-5pam
3/ s, decrement are that 0.50mm, compressibility are 17%, recovery amount is that 0.24mm, density are 2050kg/m
3.
Comparative example 4
In embodiment 1, the amount of teflon (PTFE) fine powder is changed to 945g by 1215g, the amount of Hollow Glass Sphere is changed to 405g by 135g, obtain similarly to Example 1 in addition gasket sheet (the ratio in the space in pearl: 0.64) that thickness is 3mm.
Then,, as the physical property of gasket sheet obtained above, leakage rate, decrement (compressibility), recovery amount and density have been investigated similarly to Example 1.Its result, the leakage rate of this gasket sheet is 3.0 * 10
-3pam
3/ s, decrement are that 1.47mm, compressibility are 49%, recovery amount is that 0.50mm, density are 1200kg/m
3.
Comparative example 5
Produce similarly to Example 1 preshaped body.For this preshaped body, line pressure during by calendering is adjusted into 35kN/m, roller speed is adjusted into 6m/ minute, the temperature of roller is adjusted into room temperature (approximately 25 ℃), make it successively by two rollers (interval of the diameter of roller: 700mm, roller: 20mm), two roller (interval of the diameter of roller: 700mm, roller: 10mm), two roller (interval of the diameter of roller: 700mm, roller: 5mm), two roller (interval of the diameter of roller: 700mm, roller: 3mm) and two rollers (interval of the diameter of roller: 700mm, roller: 1.5mm), produce the sheet that thickness is 1.5mm.
Then,, as the physical property of gasket sheet obtained above, leakage rate, decrement (compressibility), recovery amount and density have been investigated similarly to Example 1.Its result, the leakage rate of this gasket sheet is 2.0 * 10
-5pam
3/ s, decrement are that 0.13mm, compressibility are 4%, recovery amount is that 0.09mm, density are 2045kg/m
3.
From above result, in the pad obtaining in each embodiment, the volume of the hollow inorganic particles after fragmentation is 25 volume %～60 volume % of the volume of the hollow inorganic particles before fragmentation, so compressibility is up to more than 24%, return rate is more than 40%, thereby recoverability is excellent.
Claims (2)
1. a pipe arrangement seals and uses fluororesin gasket, it is the pad for pipe arrangement joint is each other sealed, it is by containing fluororesin and forming with the preshaped body of resin composition and form as the pad of the hollow inorganic particles of packing material, is that the mode of 25 volume %～60 volume % of the volume of the hollow inorganic particles before fragmentation has been carried out fragmentation to the hollow inorganic particles comprising in this preshaped body and formed according to the volume of the hollow inorganic particles after fragmentation.
2. a pipe arrangement seals the manufacture method with fluororesin gasket, it is for manufacturing the method for the pad for pipe arrangement joint is each other sealed, it is characterized in that, to contain fluororesin and form and be shaped to sheet with resin composition as the pad of the hollow inorganic particles of packing material, molded preshaped body is rolled, thereby according to the volume of the hollow inorganic particles after fragmentation, be that the mode of 25 volume %～60 volume % of volume of the hollow inorganic particles before fragmentation is broken by the hollow inorganic particles comprising in this preshaped body.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012068504A JP5989371B2 (en) | 2012-03-24 | 2012-03-24 | Fluororesin gasket for piping seal |
| JP2012-068504 | 2012-03-24 | ||
| PCT/JP2013/055779 WO2013146104A1 (en) | 2012-03-24 | 2013-03-04 | Fluorine resin gasket for pipe seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104204631A true CN104204631A (en) | 2014-12-10 |
Family
ID=49259377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380014769.2A Pending CN104204631A (en) | 2012-03-24 | 2013-03-04 | Fluorine resin gasket for pipe seal |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5989371B2 (en) |
| CN (1) | CN104204631A (en) |
| WO (1) | WO2013146104A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108474476A (en) * | 2015-12-28 | 2018-08-31 | 日本华尔卡工业株式会社 | Spiral winding pads |
| KR20210062985A (en) * | 2019-11-22 | 2021-06-01 | 김성진 | Manufacturing method of sheet gasket and sheet gasket manufactured from the same |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106164144B (en) * | 2014-03-31 | 2020-02-21 | 霓佳斯株式会社 | Molded article and method for producing same |
| WO2017115399A1 (en) * | 2015-12-28 | 2017-07-06 | 日本バルカー工業株式会社 | Spiral gasket |
| US10611130B2 (en) | 2016-12-07 | 2020-04-07 | Röhm Gmbh | Extruded matt foil with improved mechanical properties and a high weathering resistance |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2013199983A (en) | 2013-10-03 |
| WO2013146104A1 (en) | 2013-10-03 |
| JP5989371B2 (en) | 2016-09-07 |
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Address after: Tokyo, Japan, Japan Applicant after: Company Walka Address before: Tokyo, Japan, Japan Applicant before: Nippon Valqua Industries, Ltd. |
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Application publication date: 20141210 |