WO2006059642A1 - 変性ポリテトラフルオロエチレン成形体及びその製造方法 - Google Patents
変性ポリテトラフルオロエチレン成形体及びその製造方法 Download PDFInfo
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- WO2006059642A1 WO2006059642A1 PCT/JP2005/021986 JP2005021986W WO2006059642A1 WO 2006059642 A1 WO2006059642 A1 WO 2006059642A1 JP 2005021986 W JP2005021986 W JP 2005021986W WO 2006059642 A1 WO2006059642 A1 WO 2006059642A1
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- modified polytetrafluoroethylene
- powder
- modified
- modified ptfe
- average particle
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- 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
- C08F214/00—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
- C08F214/18—Monomers containing fluorine
- C08F214/26—Tetrafluoroethene
- C08F214/262—Tetrafluoroethene with fluorinated vinyl ethers
-
- 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
-
- 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
- B29C43/003—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor characterised by the choice of material
-
- 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
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
-
- 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
- B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
- B29C67/02—Moulding by agglomerating
- B29C67/04—Sintering
-
- 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
- C08F14/00—Homopolymers and 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
- C08F14/18—Monomers containing fluorine
- C08F14/26—Tetrafluoroethene
-
- 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
- C08F214/00—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
- C08F214/18—Monomers containing fluorine
- C08F214/26—Tetrafluoroethene
-
- 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
- B29K2027/18—PTFE, i.e. polytetrafluorethene, e.g. ePTFE, i.e. expanded polytetrafluorethene
-
- 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
Definitions
- the present invention relates to a modified polytetrafluoroethylene molded product and a method for producing a modified polytetrafluoroethylene molded product.
- compression molding has been frequently used as a method for obtaining these PTFE molded articles.
- the compression molding of PTFE includes a batch-type molding method in which a resin powder is put into a mold and compressed to form a preformed body and then fired, and a powder is put into a long-axis mold and compressed and sintered.
- a PTFE-strength seal ring with a reduced crystallinity and a crystal with a crystallinity controlled to 25 to 35% have been proposed for the purpose of improving durability (for example, Patent Documents). (See 2.)
- the crystallinity of the PTFE molded product greatly affects the gas-chemical solution barrier property, and it is necessary to increase the crystallinity in order to improve the barrier property.
- ram extrusion is generally excellent in productivity.
- the PTFE molded body obtained by ram extrusion molding has low crystallinity due to its manufacturing method.
- joints called nodes with low tensile strength and tensile elongation may have an extremely adverse effect, and PTFE molded bodies obtained by ram extrusion are generally not used for important parts. It is.
- Patent Document 1 Japanese Patent Laid-Open No. 11-70558
- Patent Document 2 JP 2001-304420 A
- Patent Document 3 JP-A-6-8344
- Patent Document 4 International Publication No. 93Z16126 Pamphlet
- An object of the present invention is to obtain a PTFE molded article excellent in bending resistance without impairing the tensile strength and tensile elongation in view of the above-mentioned present situation.
- the present invention is a modified polytetrafluoroethylene molded body formed using a modified polytetrafluoroethylene molding powder, wherein the modified polytetrafluoroethylene molding powder is
- the modified polytetrafluoroethylene which cannot be melt-molded and constitutes the above-mentioned modified polytetrafluoroethylene molding powder, has the following formula (I):
- the modified polytetrafluoroethylene molded product is A modified polytetrafluoroethylene molded product characterized by having a heat of fusion of 28 jZg or less and a bending life of 2 million times or more.
- the present invention is a method for producing a modified polytetrafluoroethylene molded body comprising subjecting a pre-processed fired compression molded body using a modified polytetrafluoroethylene powder to a baking treatment,
- the pre-processed fired compression molded article is obtained by firing an unfired compression molded article using a modified polytetrafluoroethylene powder at a temperature equal to or higher than the melting point of the modified polytetrafluoroethylene powder and then modifying the modified polytetrafluoroethylene powder. It is obtained by cooling to a temperature lower than the melting point of the polyethylene powder, and the firing treatment is performed by firing at a temperature equal to or higher than the melting point of the modified polytetrafluoroethylene powder.
- the present invention is a modified polytetrafluoroethylene molded body characterized by being manufactured by the above-described method for manufacturing a modified polytetrafluoroethylene molded body.
- the modified polytetrafluoroethylene [modified PTFE] shaped article of the present invention is formed using a modified PTFE powder.
- the modified PTFE powder is not particularly limited as long as it cannot be melt-molded. Among them, the modified PTFE molding powder described later is preferable.
- the modified PTFE constituting the modified PTFE molding powder is tetrafluoroethylene [TFE
- the perfluorobule ether unit is derived from perfluorolobyl ether.
- perfluorovinyl ether examples include perfluoro (alkyl butyl ether) having a C 1-6 perfluoroalkyl group, and perfluoro (alkoxyalkyl butyl ether) having a C 4-9 alkoxyalkyl group. It is done.
- perfluoro alkyl butyl ether
- nor fluoro (propyl butyl ether) [PPVE] perfluoro (butyl butyl ether).
- perfluoro alkoxyalkyl butyl ether
- -Ruether perfluoro (2-propoxypropyl vinyl ether).
- the above perfluorobull ether is more preferably PPVE, more preferably PPVE, PEVE, and PMVE from the viewpoint of thermal stability.
- the modified PTFE are those containing the par full O b a 0.01 to 1 mass Bulle ether units 0/0.
- the preferable lower limit of the content of the perfluorobule ether unit is 0.03% by mass, and the preferable upper limit is 0.2% by mass.
- the modified PTFE may have one perfluorovinyl ether unit or two or more perfluorovinyl ether units within the above range.
- the par full O b Bulle ether units are values obtained by performing infrared spectroscopy in the range of characteristic absorption 1,040-89 OCM _1.
- the modified PTFE has a crystallization heat power of 8.0 to 25. OJ Zg measured by a differential scanning calorimeter.
- the upper limit of the heat of crystallization is preferably 23.5 jZg.
- the heat of crystallization was raised to 250 ° C at a rate of 50 ° CZ with a differential scanning calorimeter DSC-50 (manufactured by Shimadzu Corporation) and held at that temperature. Furthermore, after melting the crystal by raising the temperature to 380 ° C at a rate of 10 ° CZ, it is converted from the peak of the crystallization point measured when the temperature is lowered at a rate of 10 ° CZ. The amount of heat that is produced.
- the modified PTFE can be obtained by polymerizing TFE and perfluorovinyl ether.
- the modified PTFE is not particularly limited, but is preferably obtained by suspension polymerization.
- the suspension polymerization is preferably performed, for example, in the presence of an aqueous medium by setting the polymerization temperature to 0 to 100 ° C.
- an emulsifier etc. can also be used in the said suspension polymerization.
- a polymerization initiator It is preferable to use a persulfate such as ammonium persulfate.
- the amounts of the emulsifier and the polymerization initiator used can be appropriately set according to the type of monomer used, the composition of the desired modified PTFE, and the like.
- a modified PTFE molding powder having a large specific surface area as described later can be obtained.
- Modified PTFE molding powder obtained by suspension polymerization is sometimes referred to as molding powder.
- the modified PTFE molding powder is a modified PTFE obtained by performing the above polymerization, for example, drying, pulverizing treatment, etc. by a known method such as the method described in WO 93Z16126. Can be obtained.
- Examples of the pulverization treatment include shear pulverization and impact pulverization.
- the shearing pulverization is a pulverization method based on crushing or grinding by a shearing force.
- the shearing pulverization is usually pulverization by the impact action of a hammer rotating at high speed, and includes pulverization using a pulverizer such as a hammer mill.
- impact pulverization is a pulverization method based on pulverization by impact force without substantially applying a shearing force.
- the impact pulverization is usually pulverization by causing particles to collide with a high-speed air flow, and examples thereof include pulverization using a pulverizer such as an air jet mill.
- impact pulverization is preferable from the viewpoint of bending resistance.
- the modified PTFE molding powder in the present invention is either a powder itself obtained from a polymerization reaction solution obtained after polymerization, a fine powder obtained by appropriately pulverizing the powder, or a powder obtained by granulating the powder or fine powder.
- a granulated product is preferable from the viewpoint of handleability and workability.
- the modified PTFE molding powder has a small particle size distribution!
- the modified PTFE molding powder may contain additives such as a colorant and an antistatic agent.
- the modified PTFE molding powder preferably has a specific surface area of 0.5 to 9.0 m 2 Zg.
- the specific surface area has a more preferable lower limit of 0.8 m 2 Zg and a more preferable upper limit of 4. Om 2 Zg.
- the specific surface area is determined by monosoap (manufactured by Yuasa Iotas Co., Ltd.) according to the nitrogen adsorption method described in Analytical 'Chemistry (Anal. Chem), ⁇ ol. 30, page 1387 (1985). It is measured.
- the modified PTFE molding powder in the present invention is obtained by suspension polymerization
- the modified PTFE can be obtained by, for example, pulverizing to obtain a small particle size. Preferable in that it tends to reduce voids in the molded body.
- the average particle size measured by the dry laser method is 100 ⁇ m or less.
- the more preferable upper limit is 50 ⁇ m, and more preferable.
- the upper limit is 40 ⁇ m, and a particularly preferable upper limit is 30 ⁇ m.
- the average particle size measured by a dry laser method is preferably 100 ⁇ m or less, and preferably 50 ⁇ m or less. Within these more preferred ranges, it may be 3 m or more.
- the powder obtained by shearing-type grinding is usually an amorphous fine powder.
- the average particle size measured by dry laser method is preferably 50 ⁇ m or less, preferably 30 ⁇ m or less. If it is a fine powder within these ranges, which is more preferred, it may be 3 m or more.
- the modified PTFE molding powder in the present invention is a granulated product, that is, a granulated product
- the average particle size within the above range in the powder before granulation or the fine powder before granulation is preferably 1000 m or less, more preferably 90 or less, more preferably S, more preferably 200 to 900 111, Particularly preferably, it is 600 ⁇ m or less.
- the above average particle diameter is measured by a dry laser method using a particle size distribution measuring device HELOS & RODOS (manufactured by SYMPATEC) when granulated, before or after granulation. It is.
- HELOS & RODOS manufactured by SYMPATEC
- the average particle size after granulation is the dry sieve method, specifically, International Publication No.99Z12996 It was measured by the average particle size measurement method described in the pamphlet, page 12, line 23 to page 13, line 4.
- the above modified PTFE molding powder usually has a specific surface area and an average particle size within the above-mentioned range, it has a good pressure transmission at the time of molding. It is possible to obtain a molded article excellent in the above.
- the modified PTFE molding powder of the present invention preferably has an apparent density of 0.60 to 0.95 gZml.
- the above apparent density has a more preferable lower limit of 0.65 gZml and a more preferable upper limit of 0.90 g / ml.
- the apparent density is a value measured in accordance with JIS K 6891-5.3.
- the modified PTFE molding powder of the present invention has an apparent density of 0.60-0.95 gZml and an average particle size of 1000 gm in terms of bending resistance and other electrical and mechanical properties.
- the preferred apparent density is less than m and the average particle size is more preferably 600 ⁇ m or less.
- Each modified PTFE molding powder having an apparent density within the above range, an average particle diameter within the above range, or an apparent density and an average particle diameter within the above range is, for example, (1 ) Granulate fine powder with an average particle size of 100 m or less, preferably 50 m, obtained by shearing grinding and measured by dry laser method. (2) Obtained by impact grinding and measured by dry laser method. It can be prepared by granulating a fine powder having an average particle size of 50 ⁇ m or less, preferably 30 ⁇ m or less.
- the granulated product obtained by granulating the fine powder obtained by the above various pulverization methods is usually a granular powder.
- the granular powder having an apparent density within the above range preferably has an average particle size after granulation of 1000 ⁇ m or less, more preferably 900 ⁇ m or less, and further preferably 20 to 900. It is desirable that the granulated product be ⁇ m, particularly preferably 600 ⁇ m or less.
- the modified PTFE molding powder can be formed into a molded body having excellent bending resistance and a long bending life.
- the modified PTFE molded product of the present invention is preferably formed using the above-mentioned modified PTFE molding powder.
- the modified PTFE molding powder cannot be melt-molded, but can be suitably manufactured by, for example, the method for manufacturing a modified PTFE molded body of the present invention described later.
- the modified PTFE molded product of the present invention has a heat of fusion of 28 jZg or less.
- the heat of fusion is within the above range, it may be 18 jZg or more, preferably 25 jZg or less, more preferably 23 jZg or less.
- the modified PTFE molded product of the present invention has a heat of fusion within the above range, it has a low degree of crystallinity and excellent bending resistance.
- the heat of fusion is obtained by cutting out a modified PTFE compact strength piece, and about 3 mg of the piece with a differential scanning calorimeter RDC220 (manufactured by Seiko Denshi Kogyo Co., Ltd.) at a rate of 50 ° CZ in a nitrogen atmosphere. Raise the temperature to 250 ° C, hold for 1 minute, further raise the temperature to 380 ° C at a rate of 10 ° CZ, and then melt the crystals sufficiently, then speed from 380 ° C to 10 ° CZ This is the value obtained by converting the curve peak of the crystallization point measured when the temperature is lowered to 250 ° C.
- the modified PTFE molded product of the present invention has a bending life [MIT] of 2 million times or more.
- the MIT is preferably 2.5 million times or more. If the above MIT is within the above range, it can be, for example, 3 million times or less, or 2.8 million times or less.
- modified PTFE molded product of the present invention has an MIT within the above range, it is very excellent in bending resistance.
- MIT fold resistance tester manufactured by Yasuda Seiki Co., Ltd.
- MIT fold resistance tester manufactured by Yasuda Seiki Co., Ltd.
- MIT fold resistance tester is used for specimens cut from each modified PTFE molded body to a width of 5 mm, thickness of 0.5 mm, and length of 120 mm. It was measured using.
- the modified PTFE molded product of the present invention uses a dumbbell having a specific shape with a cut in the center of the length, and is used in a dematching test (hereinafter sometimes referred to as "special dematching test") in accordance with JIS K 6301.
- special dematching test a dematching test
- the bending life at 10 ° C can be increased to 300,000 times or more.
- the bending life by the special dematcher test is 90% at the center of the length.
- the bending life by the special dematcher test measures the bending resistance of the DUT with higher accuracy than the MIT described above. Therefore, in general, even if the MIT value is within the above range, the bending life by the special dematcher test may be less than the above range, while if the bending life by the special dematcher test is within the above range, The MIT value falls within the above range.
- the modified PTFE molded article of the present invention has an MIT value within the above-mentioned range, and further, can achieve a flex life by a special dematcher test within the above-mentioned range. .
- the modified PTFE molded product of the present invention preferably has a tensile strength of 30 MPa or more.
- the tensile strength is more preferably a lower limit of 35 MPa and a further preferable lower limit force of 0 MPa, but may be 60 MPa or less as long as it is within the above range.
- the modified PTFE molded product of the present invention preferably has a tensile elongation of 300% or more.
- the tensile elongation is more preferably 350% and further preferably 380%, but may be 500% or less as long as it is within the above range.
- the tensile strength and tensile elongation are measured according to JIS K6891.
- the modified PTFE molded article of the present invention can obtain excellent bending resistance without impairing the mechanical strength such as the tensile strength and the tensile elongation.
- the method for producing a modified PTFE molded product of the present invention is a method for producing a modified PTFE molded product by subjecting a pre-processed sintered compression molded product using a modified PTFE powder to a firing treatment.
- the modified PTFE powder is preferably used as the modified PTFE powder.
- fired compression molded body before treatment is a method in which an unfired compression molded body using a modified PTFE powder is fired at a temperature equal to or higher than the melting point of the modified PTFE powder. Primary firing There are times when it is said that the process is complete. ) And then cooled to a temperature below the melting point of the modified PTFE powder (sometimes referred to as “primary cooling step” in this specification).
- the "green fired compact” is a compact formed by putting a modified PTFE powder in a mold and compressing it, and has no history of heating to a temperature higher than the melting point of the modified PTFE powder. ⁇ It is a thing.
- the lower limit of 0.1 MPa to 1 OOMPa is more preferable, and the upper limit of 80 MPa is more preferable.
- the primary firing step of firing the "green fired compact" at a temperature equal to or higher than the melting point of the modified PTFE powder depends on the thickness of the green compact, the firing time, etc.
- a more preferable lower limit of the calcination temperature, which is preferably performed by heating at a temperature of ° C, is 360 ° C, and a more preferable upper limit is 390 ° C.
- the primary firing step can usually be carried out by placing an unfired compression molded product produced at room temperature into a firing furnace that has been previously adjusted to a firing temperature within the above range.
- the melting point of the modified PTFE powder is that when a sample of 3 mg is heated to 380 ° C at a rate of 10 ° CZ with a differential scanning calorimeter DSC-50 (manufactured by Shimadzu Corporation). It is the value obtained as the temperature of the melting heat peak that can be measured.
- the primary cooling step of cooling to a temperature below the melting point of the modified PTFE powder is usually preferable to cool to room temperature to 300 ° C, more preferably, Cool to normal temperature to 150 ° C.
- the cooling rate in the primary cooling step is not particularly limited. For example, it may be performed by air cooling.
- the "compression molding” performed when producing the above-mentioned unsintered compression molded product is as follows: (i) “Narrow sense” in which a resin powder is put into a mold and compressed to form a preform (preform) and then fired (Ii) Ram extrusion molding, in which a compact formed by pouring resin powder into a long-axis mold is lowered into a firing section in the mold and fired. It may be.
- the pre-treatment fired compression-molded body is produced as described above and then continued.
- the time point at which the pre-processed fired compression molded article is finished and the time point at which the fired process described below is started are discontinuous. A certain method may be used.
- the pre-processed fired compression-molded body is prepared, bow I is continued!
- the pre-processed fired compression-molded body is prepared and fired. Examples include a method in which the inside of a long axis mold is continuously transferred.
- discontinuous method of the latter (2) for example, a commercially available product corresponding to the pre-processed fired compression molded article may be purchased and subjected to the firing process described below, or by a so-called batch method.
- a method may be used in which a pre-treatment baked compression-molded body is prepared and then subjected to the calcination treatment described below.
- the latter notch type method is a preferred method when using narrowly-defined compression molding.
- the firing treatment in the method for producing a modified PTFE molded body of the present invention is performed on the above-mentioned calcined compact before firing.
- the firing treatment is performed by firing at a temperature equal to or higher than the melting point of the modified PTFE powder (sometimes referred to as “secondary firing step” in this specification).
- the second firing step is preferably performed by heating at a temperature of 345 to 400 ° C, although it depends on the thickness, firing time, etc. of the fired compression molded body before treatment.
- a more preferable lower limit of the temperature is 350 ° C.
- a more preferable lower limit is 360 ° C.
- a more preferable upper limit is 395 ° C.
- a further preferable upper limit is 390 ° C.
- the rate of temperature rise at the start of firing in the secondary firing step is not particularly limited.
- the firing treatment is performed continuously with the preparation of the pre-treatment fired compression molded article by the ram extrusion molding of (1) described above.
- the long axis mold is divided into about three equal parts in the axial direction, the zone for performing the primary firing step set at 350 to 400 ° C, the zone for performing the primary cooling step, and 350 to 400 It is preferable to divide the zone into the zones where the secondary firing step set at ° C is performed, and move the compression molded body in this order.
- the pre-treatment fired compression molded article prepared at room temperature is It is preferable to carry out by placing in a firing furnace set to a firing temperature within the range.
- the secondary firing fired compacts of step through the can (in the present specification, sometimes referred to as "secondary cooling step”.) Which cooled the 0 the first
- the secondary cooling step is to cool to a temperature below the melting point of the modified PTFE powder.
- the cooling temperature in this step is not particularly limited, and may usually be a temperature at which the obtained modified PTFE molded product is stored or used.
- the cooling rate in the secondary cooling step depends on the shape and size of the molded body, the degree of crystallinity can be adjusted according to the desired bending resistance by controlling and adjusting the cooling rate.
- the cooling rate is, in terms of ease of management, actually (a) rapid cooling by throwing it into water immediately after the completion of the secondary firing process, or (b) secondary After completion of the firing step, it is sufficient to take out the firing furnace power and perform slow cooling by leaving it in the atmosphere at room temperature.
- the method for producing a modified PTFE molded article of the present invention performs the above-described firing treatment, for example, annealing is performed at a temperature lower than the melting point of the resin instead of the firing treatment.
- annealing is performed at a temperature lower than the melting point of the resin instead of the firing treatment.
- the method for producing the modified PTFE molded product of the present invention is not sufficient in improving the bending resistance, and the above-mentioned firing treatment is performed at a temperature equal to or higher than the melting point of the modified PTFE powder. It is thought to promote the relaxation of
- a modified PTFE molded article obtained by performing the above-described method for producing a modified PTFE molded article of the present invention is also one aspect of the present invention.
- modified PTFE molded product (B) of the present invention obtained by carrying out the method for producing the modified PTFE molded product of the present invention may be referred to as “modified PTFE molded product (B) of the present invention”.
- the modified PTFE molded product (B) of the present invention is obtained by performing the above-described method for producing the modified PTFE molded product of the present invention, and is the same crystal as the modified PTFE molded product (A) of the present invention. It is excellent in mechanical properties such as flex resistance and the like with low degree of conversion.
- modified PTFE molded product of the present invention used without the symbols (A) and (B) hereinafter is the above-mentioned "modified PTFE molded product of the present invention ( A) "and” of the present invention
- Modified PTFE molded product (B) Represents a concept that can contain j.
- the modified PTFE molded product of the present invention is excellent in mechanical properties, in particular, bending resistance and creep resistance, and therefore can be suitably used as a bending resistant molded product, a creep resistant molded product or the like. it can.
- Examples of the bending resistant molded body include bellows, diaphragms, hoses, piston rings, butterfly bubbles, and the like.
- creep resistant molded body examples include ball bubble sheets, diaphragms, packings, gaskets, piston rings, bellows, diaphragms, butterfly bubbles, and the like.
- the modified PTFE molded article of the present invention is excellent in chemical resistance, it can be suitably used as a chemical resistant permeable molded article.
- Examples of the chemical-resistant permeable molded body include bellows and diaphragms of chemical pumps.
- the above chemical pumps are highly corrosive fluids used in the chemical industry, semiconductor manufacturing equipment, etc .; for example, gases such as fluorine, hydrogen chloride, sulfur oxides, nitrogen oxides; hydrogen fluoride, hydrochloric acid, It can be used for transporting various organic acids such as sulfuric acid, nitric acid, phosphorus oxychloride, chlorothionyl chloride, sulfuryl chloride, chromic acid, and liquids such as acid halogen oxalic acid.
- gases such as fluorine, hydrogen chloride, sulfur oxides, nitrogen oxides
- hydrogen fluoride hydrochloric acid
- It can be used for transporting various organic acids such as sulfuric acid, nitric acid, phosphorus oxychloride, chlorothionyl chloride, sulfuryl chloride, chromic acid, and liquids such as acid halogen oxalic acid.
- the modified PTFE molded article of the present invention has the above-described configuration, it has excellent bending resistance without impairing tensile strength and tensile elongation.
- a modified PTFE molded article of the present invention Since the method for producing a modified PTFE molded article of the present invention has the above-described configuration, a modified PTFE molded article having the above characteristics can be produced by a simple method.
- modified PTFE powder was taken out and pulverized with a hammer mill until the average particle size force became 2 ⁇ m, and modified PTFE molding powder 1 was obtained.
- modified tetrafluoroethylene [modified PTFE] molding powder and the granulated powder described below were measured for PPVE content, specific surface area, heat of crystallization, apparent density, and average particle size according to the following methods. .
- a 3mg sample was obtained by analyzing the peak of heat of fusion that can be measured when the temperature was raised to 380 ° C at a rate of 10 ° CZ with a differential scanning calorimeter DSC-50 (manufactured by Shimadzu Corporation). .
- the particle size distribution was measured by a dry laser method using a HELOS & RODOS (manufactured by SYMPATEC).
- the modified PTFE molding powder obtained from this synthesis example had a PPVE content of 0.062% by mass and a specific surface area of 1.5m 2 Zg.
- the granulated powder of modified PTFE molding powder 1 obtained in Synthesis Example 1 was obtained using a ram extrusion mold with a mold inner diameter of 46 ⁇ , a mold length of 1100 mm, and a heating length of 900 mm set to the temperature of C. Then, extrusion was performed at a filling length of 60 mm, a pressure of 3 MPa, a pressurization time of 55 seconds, and a cycle of 65 seconds, and then cooled to room temperature to obtain a pre-processed sintered compact.
- the obtained pre-processed fired compression-molded body was cut into an arbitrary length, fired in an electric furnace set in advance at 380 ° C. for 30 minutes, and allowed to cool at room temperature to form the modified PTFE molding of the present invention.
- Got body 1
- the granulated powder of modified PTFE molding powder 1 obtained in Synthesis Example 1 was obtained using a ram extrusion mold with a mold inner diameter of 46 ⁇ , a mold length of 1100 mm, and a heating length of 900 mm set to the temperature of C.
- the primary firing process was performed by extrusion at a filling length of 60 mm, pressure of 3 MPa, pressurization time of 55 seconds, and a cycle of 65 seconds, followed by a jacket connected to the lower part of the ram extrusion mold (The jacket was passed through a cooling zone (length: about 300 mm) of 5 ° C refrigerant to obtain a pre-processed calcined compact. Subsequently, the obtained pre-processed fired compression molded article was passed through an extrusion mold having a mold inner diameter of 50 ⁇ and a length of 500 mm set at 380 ° C. and melted again to perform a secondary firing step. The product was taken out from the mold and allowed to cool at room temperature to obtain a modified PTFE molded product 2.
- the granulated powder 21 Og of the modified PTFE molding powder 1 obtained in Synthesis Example 1 was put into a compression molding mold with a mold inner diameter of 50 ⁇ and a mold length of 500 mm, and the temperature was increased to 29.4 MPa at room temperature. The pressure was maintained for 5 minutes to obtain a green compact.
- the obtained green compact was taken out of the mold and fired at 370 ° C for 5 hours. Then, the fired compression molding before processing was obtained by standing to cool at room temperature.
- the obtained pre-processed sintered compression molded body was fired for 5 hours in an electric furnace set in advance at 380 ° C., then taken out of the furnace and allowed to cool at room temperature to obtain the modified PTFE molded body 3 of the present invention. Obtained.
- the granulated powder of modified PTFE molding powder 1 obtained in Synthesis Example 1 is 380 in the upper 300 mm. C, middle 300mm 380. C, 350 for the bottom 300mm.
- a ram extrusion mold with a mold inner diameter of 46 ⁇ , a mold length of 1100 mm and a heating length of 900 mm, set to a temperature of C, filling length 60 mm, pressure 3 MPa, pressurization time 55 seconds, 1 cycle 65 seconds
- the molded product A was obtained by extruding the resulting fired product and taking out the mold force and cutting it into an arbitrary length.
- 210 g of the granulated powder of modified PTFE molding powder 1 obtained in Synthesis Example 1 was put into a compression molding mold with a mold inner diameter of 50 ⁇ and a mold length of 500 mm, and pressurized to 29.4 MPa at room temperature. Hold for 5 minutes, then take out the internal force of the mold, then raise the temperature to 370 ° C in an electric furnace at a speed of 50 ° CZ time, calcinate for 5 hours at 370 ° C, then 50 ° C
- the molded body B was obtained by lowering the temperature to the room temperature at the rate of CZ time.
- Test example For each molded body obtained from Examples 1 to 3 and Comparative Examples 1 to 4, bending life (MIT), tensile strength (TS), tensile elongation (EL), and heat of fusion were measured by the following test methods. It was measured. Test method
- MIT folding resistance tester manufactured by Yasuda Seiki Co., Ltd.
- IS P 8115 cut from each molded product to a width of 5 mm, thickness of 0.5 mm, and a minimum length of 120 mm!
- Molded body strength A small piece was cut out, about 3 mg of the small piece was precisely weighed, stored in a dedicated aluminum pan, and measured with DSC apparatus RDC220 (manufactured by Seiko Denshi Kogyo Co., Ltd.). In the measurement, first, the aluminum pan was heated to 250 ° C at a rate of 50 ° CZ in a nitrogen atmosphere, held for 1 minute, and further heated to 380 ° C at a rate of 10 ° CZ for crystal growth. Thawed sufficiently. Next, the temperature was lowered from 380 ° C to 250 ° C at a rate of 10 ° C Z, and the thermal peak at the crystallization point was converted.
- Modified PTFE molded products 1 to 3 obtained by calcining the pre-treated calcined compressed molded product were subjected to the secondary calcining process, molded product A, and molded product B obtained using the above-mentioned commercially available modified PTFE and C Compared to MIT, the MIT, tensile strength, and tensile elongation were all excellent.
- Molded product B obtained by compression molding in the narrow sense without performing the secondary firing step was excellent in tensile strength, but modified PTFE molded products 1 to 3 did not impair the tensile strength compared to molded product B. ⁇ Excellent MIT and tensile elongation.
- Modified PTFE powder was prepared in the same manner as in Synthesis Example 1.
- the obtained modified PTFE powder was subjected to impact pulverization using an air jet mill to prepare a fine powder with an average particle size of 20 m, and the fine powder was further granulated to give an apparent density of 0.80 gZml, an average particle size.
- a cylindrical compression mold having an inner diameter of 50 mm and a length of 500 mm was filled with 210 g of modified PTFE molding powder 2 and held at a molding pressure of 29.4 MPa for 5 minutes at room temperature to prepare a preform.
- the obtained preform was heated to 365 ° C at 50 ° CZ time, fired at 365 ° C for 5 hours, then cooled down at 50 ° CZ time, heat of fusion 26jZg, modified PTFE with a bending life of 2.8 million times A compact 4 was obtained.
- the obtained modified PTFE molded body 4 was subjected to a special dematcher test and an endurance test at 10 ° C.
- the bending life was 300,000 times.
- the special dematcher test described above is to create a test piece with a width of 10 mm, a width of 20 mm, a length of 150 mm, and a thickness of 1 mm.
- a compliant dematcher tester manufactured by Yasuda Seiki Co., Ltd.
- the above bending life is due to bending fatigue.
- the above test was repeated 5 times for the same sample, and the maximum and minimum values were removed! The average value for the 3 test values was obtained as the measured value.
- a cylindrical compression mold with an inner diameter of 50 mm and a length of 500 mm is filled with 210 g of modified PTFE molding powder 2 and held at room temperature for 5 minutes at a molding pressure of 29.4 MPa, 50 ⁇ , height of 50 mm, unfired
- a compression molded body was produced.
- the resulting green compact was fired at 365 ° C for 5 hours. Thereafter, it was allowed to cool to produce a pre-processed fired compression molded body, which was further fired at 380 ° C. for 5 hours and then allowed to cool to obtain a modified PTFE molded body 5 having a melting heat of 22 jZg and a bending life of 3.7 million times.
- the modified PTFE molding powder 2 was molded in the same manner as in Example 1 to obtain a modified PTFE molded body 6 having a heat of fusion of 22 jZg and a bending life of 3.8 million times.
- modified PTFE powder prepared in the same manner as in Synthesis Example 1 was sheared using a hammer mill to prepare modified PTFE molding powder 3 having a crystallization heat of 2 jZg and an average particle size of 42 m.
- Impact-type pulverization was performed in the same manner as in Synthesis Example 2, modified with an average particle size of 20 / zm.
- Modified PTFE molding powder 6 having a particle size of 27 m and a crystallization heat of 23 jZg and modified PTFE molding powder 7 having an average particle size of 34 m and a crystallization heat of 2 jZg were prepared.
- Modified PTFE molding powders 3 to 7 were each filled into a cylindrical compression molding mold with an inner diameter of 50 mm and a length of 500 mm, 210 g, held at room temperature at a molding pressure of 29.4 MPa for 5 minutes, 50 ⁇ , height 50 mm , Calcined at 365 ° C for 5 hours, and then cooled down at a rate of 50 ° CZ time.
- Body 7 modified heat of 26jZg, modified PTFE molded body with 3.9 million times of bending life 8, modified heat of 26jZg, modified life of 3.6 million times of modified PTFE molded body 9, modified heat of 26jZg, bent life of 3.4 million times of modified PTFE molded body 10 Further, a modified PTFE molded article 11 having a heat of fusion of 27 jZg and a bending life of 3 million times was obtained.
- Example 4 ⁇ Table 2 shows data for each modified PTFE molded body of L1.
- Modified PTFE molding powders 3 to 7 were filled in a cylindrical compression molding die with an inner diameter of 50 mm and a length of 500 mm, respectively, and held at room temperature for 5 minutes at a molding pressure of 29.4 MPa, 50 ⁇ , height 50 mm An unfired compression molded body was prepared. The obtained green compacts were fired at 365 ° C. for 5 hours, and then allowed to cool to obtain pre-treated fired compacts. The obtained pre-treated fired compression molded bodies were fired at 380 ° C. for 5 hours, and allowed to cool to obtain modified PTFE molded bodies 12-16.
- a special dematcher test was conducted on each modified PTFE molded body 12 to 16 in the same manner as in Example 4, and a durability test at ⁇ 10 ° C. was conducted. It was 10,000, 660,000, 540,000, 490,000, and 480,000.
- a special dematcher test was performed on each molded body in the same manner as in Example 4, and a durability test at -10 ° C was performed.
- the bending life was 90,000 times and 80,000 times in the order of molded bodies E to I. It was 20,000 times, 1.80,000 times, and 17,000 times.
- Table 3 shows data for each molded body obtained in Examples 12 to 16 and Comparative Examples 5 to 9.
- Example 1 2 Example 1 3
- Example 1 4 Example 1 5
- Example 1 6 Modified PTFE (Modified PTFE (Modified PTFE (Modified PTFE (Modified PTFE (Modified PTFE Molded Body 1 2)) Molded Body 1 3) Molded Body 1 4) Molded body 1 5) Molded body 1 6) Special dematcher
- the modified PTFE molded article of the present invention has the above-described configuration, it has excellent bending resistance without impairing tensile strength and tensile elongation.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Description
Claims
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JP2006547978A JP5012027B2 (ja) | 2004-11-30 | 2005-11-30 | 変性ポリテトラフルオロエチレン成形体及びその製造方法 |
US11/791,717 US7528221B2 (en) | 2005-11-30 | 2005-11-30 | Modified polytetrafluoethylene molded article and process for manufacture thereof |
EP05811241A EP1829904A4 (en) | 2004-11-30 | 2005-11-30 | FORM BODY OF MODIFIED POLYTETRAFLUOROETHYLENE AND METHOD OF MANUFACTURING THEREOF |
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JP2004346686 | 2004-11-30 | ||
JP2004-346686 | 2004-11-30 | ||
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EP (1) | EP1829904A4 (ja) |
JP (1) | JP5012027B2 (ja) |
KR (1) | KR20070086795A (ja) |
WO (1) | WO2006059642A1 (ja) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009041433A1 (ja) * | 2007-09-26 | 2009-04-02 | Iwaki Co., Ltd. | ポリテトラフルオロエチレン製ベローズ、その製造方法、その製造装置およびそれを用いた流体圧送機器 |
JP2009154534A (ja) * | 2007-12-03 | 2009-07-16 | Daikin Ind Ltd | 成形体、ダイヤフラム弁、ダイヤフラムポンプ及びその製造方法 |
JP2010520435A (ja) * | 2007-03-07 | 2010-06-10 | 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 | 多層管 |
WO2013115374A1 (ja) * | 2012-02-01 | 2013-08-08 | ダイキン工業株式会社 | 封止材料 |
WO2022009781A1 (ja) * | 2020-07-09 | 2022-01-13 | ダイキン工業株式会社 | 三次元造形物 |
WO2024190687A1 (ja) * | 2023-03-13 | 2024-09-19 | ニチアス株式会社 | 変性ポリテトラフルオロエチレン樹脂の粉体、及び成形体 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1993016126A1 (en) * | 1992-02-05 | 1993-08-19 | Daikin Industries, Ltd. | Polytetrafluoroethylene powder for molding |
JPH1135709A (ja) * | 1997-07-16 | 1999-02-09 | Daikin Ind Ltd | 焼成ポリテトラフルオロエチレンシートの平滑化方法 |
WO2001070854A1 (fr) * | 2000-03-24 | 2001-09-27 | Daikin Industries, Ltd. | Anneau d'etancheite |
WO2003035724A1 (fr) * | 2001-10-24 | 2003-05-01 | Daikin Industries, Ltd. | Poudre de ptfe, et procede de fabrication correspondant, aux fins de moulage |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5709944A (en) * | 1992-02-05 | 1998-01-20 | Daikin Industries, Ltd. | Polytetrafluoroethylene molding powder |
DE4332712A1 (de) * | 1993-09-25 | 1995-03-30 | Hoechst Ag | Verfahren zur Herstellung eines modifizierten Polytetrafluorethylens und seine Verwendung |
US6870020B2 (en) * | 2002-04-30 | 2005-03-22 | E. I. Du Pont De Nemours And Company | High vinyl ether modified sinterable polytetrafluoroethylene |
-
2005
- 2005-11-30 WO PCT/JP2005/021986 patent/WO2006059642A1/ja active Application Filing
- 2005-11-30 JP JP2006547978A patent/JP5012027B2/ja active Active
- 2005-11-30 EP EP05811241A patent/EP1829904A4/en not_active Withdrawn
- 2005-11-30 KR KR1020077014885A patent/KR20070086795A/ko not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1993016126A1 (en) * | 1992-02-05 | 1993-08-19 | Daikin Industries, Ltd. | Polytetrafluoroethylene powder for molding |
JPH1135709A (ja) * | 1997-07-16 | 1999-02-09 | Daikin Ind Ltd | 焼成ポリテトラフルオロエチレンシートの平滑化方法 |
WO2001070854A1 (fr) * | 2000-03-24 | 2001-09-27 | Daikin Industries, Ltd. | Anneau d'etancheite |
WO2003035724A1 (fr) * | 2001-10-24 | 2003-05-01 | Daikin Industries, Ltd. | Poudre de ptfe, et procede de fabrication correspondant, aux fins de moulage |
Non-Patent Citations (1)
Title |
---|
See also references of EP1829904A4 * |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010520435A (ja) * | 2007-03-07 | 2010-06-10 | 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 | 多層管 |
WO2009041433A1 (ja) * | 2007-09-26 | 2009-04-02 | Iwaki Co., Ltd. | ポリテトラフルオロエチレン製ベローズ、その製造方法、その製造装置およびそれを用いた流体圧送機器 |
JP2009097725A (ja) * | 2007-09-26 | 2009-05-07 | Hirosuke Sato | ポリテトラフルオロエチレン製ベローズ、その製造方法、その製造装置およびそれを用いた流体圧送機器 |
JP2009154534A (ja) * | 2007-12-03 | 2009-07-16 | Daikin Ind Ltd | 成形体、ダイヤフラム弁、ダイヤフラムポンプ及びその製造方法 |
WO2013115374A1 (ja) * | 2012-02-01 | 2013-08-08 | ダイキン工業株式会社 | 封止材料 |
JP2013177574A (ja) * | 2012-02-01 | 2013-09-09 | Daikin Industries Ltd | 封止材料 |
WO2022009781A1 (ja) * | 2020-07-09 | 2022-01-13 | ダイキン工業株式会社 | 三次元造形物 |
JP2022015603A (ja) * | 2020-07-09 | 2022-01-21 | ダイキン工業株式会社 | 三次元造形物 |
JP7048907B2 (ja) | 2020-07-09 | 2022-04-06 | ダイキン工業株式会社 | 三次元造形物 |
TWI825447B (zh) * | 2020-07-09 | 2023-12-11 | 日商大金工業股份有限公司 | 三維造形物及其製造方法 |
EP4180210A4 (en) * | 2020-07-09 | 2024-07-03 | Daikin Ind Ltd | THREE-DIMENSIONAL MOLDED PRODUCT |
WO2024190687A1 (ja) * | 2023-03-13 | 2024-09-19 | ニチアス株式会社 | 変性ポリテトラフルオロエチレン樹脂の粉体、及び成形体 |
Also Published As
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EP1829904A4 (en) | 2009-06-17 |
KR20070086795A (ko) | 2007-08-27 |
JP5012027B2 (ja) | 2012-08-29 |
EP1829904A1 (en) | 2007-09-05 |
JPWO2006059642A1 (ja) | 2008-06-05 |
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