JPH03258887A - Production of sealing material - Google Patents
Production of sealing materialInfo
- Publication number
- JPH03258887A JPH03258887A JP5594890A JP5594890A JPH03258887A JP H03258887 A JPH03258887 A JP H03258887A JP 5594890 A JP5594890 A JP 5594890A JP 5594890 A JP5594890 A JP 5594890A JP H03258887 A JPH03258887 A JP H03258887A
- Authority
- JP
- Japan
- Prior art keywords
- fluororesin
- impregnated
- resin
- base material
- sealing material
- 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.)
- Granted
Links
- 239000003566 sealing material Substances 0.000 title claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 title claims description 14
- 239000000463 material Substances 0.000 claims abstract description 40
- 238000010438 heat treatment Methods 0.000 claims abstract description 22
- 239000000835 fiber Substances 0.000 claims abstract description 19
- 239000004094 surface-active agent Substances 0.000 claims abstract description 19
- 239000006185 dispersion Substances 0.000 claims abstract description 18
- 239000011347 resin Substances 0.000 claims abstract description 16
- 229920005989 resin Polymers 0.000 claims abstract description 16
- 239000010419 fine particle Substances 0.000 claims abstract description 14
- 238000005470 impregnation Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 15
- 238000000465 moulding Methods 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 16
- 239000012535 impurity Substances 0.000 abstract description 13
- -1 polyoxyethylene Polymers 0.000 abstract description 12
- 239000003814 drug Substances 0.000 abstract description 8
- 229920003171 Poly (ethylene oxide) Polymers 0.000 abstract description 7
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 abstract description 6
- 229920000049 Carbon (fiber) Polymers 0.000 abstract description 4
- 239000004917 carbon fiber Substances 0.000 abstract description 4
- 235000013305 food Nutrition 0.000 abstract description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 abstract description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 abstract description 4
- 229920006231 aramid fiber Polymers 0.000 abstract description 3
- 231100000614 poison Toxicity 0.000 abstract description 3
- 239000004760 aramid Substances 0.000 abstract description 2
- 239000011490 mineral wool Substances 0.000 abstract description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 abstract 1
- 125000000217 alkyl group Chemical group 0.000 abstract 1
- 229940079593 drug Drugs 0.000 abstract 1
- 239000002574 poison Substances 0.000 abstract 1
- 239000012286 potassium permanganate Substances 0.000 description 18
- 239000000243 solution Substances 0.000 description 8
- 238000007789 sealing Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 4
- 238000010828 elution Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000008213 purified water Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000002759 woven fabric Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 125000005907 alkyl ester group Chemical group 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000000565 sealant Substances 0.000 description 2
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 2
- 239000003440 toxic substance Substances 0.000 description 2
- 229920001214 Polysorbate 60 Polymers 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 150000003973 alkyl amines Chemical class 0.000 description 1
- 150000005215 alkyl ethers Chemical class 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- UUAGAQFQZIEFAH-UHFFFAOYSA-N chlorotrifluoroethylene Chemical compound FC(F)=C(F)Cl UUAGAQFQZIEFAH-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000007720 emulsion polymerization reaction Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- HCDGVLDPFQMKDK-UHFFFAOYSA-N hexafluoropropylene Chemical group FC(F)=C(F)C(F)(F)F HCDGVLDPFQMKDK-UHFFFAOYSA-N 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920002493 poly(chlorotrifluoroethylene) Polymers 0.000 description 1
- 239000005023 polychlorotrifluoroethylene (PCTFE) polymer Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000011163 secondary particle Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- ZNCPFRVNHGOPAG-UHFFFAOYSA-L sodium oxalate Chemical compound [Na+].[Na+].[O-]C(=O)C([O-])=O ZNCPFRVNHGOPAG-UHFFFAOYSA-L 0.000 description 1
- 229940039790 sodium oxalate Drugs 0.000 description 1
- 239000012085 test solution Substances 0.000 description 1
Landscapes
- Sealing Material Composition (AREA)
Abstract
Description
【発明の詳細な説明】
及貝立及五没１
本発明は、水などへの不純物の溶出量が少なく食品ある
いは医薬品を扱う分野で好適に使用できるフッ素樹脂を
含有したシール材の製造方法に関する。[Detailed Description of the Invention] The present invention relates to a method for manufacturing a sealing material containing a fluororesin, which has a small amount of impurities eluted into water and can be suitably used in the field of handling food or medicine. .
澄−思！【惹整駈」１男−も
炭素繊維、ガラス繊維およびアラミド繊維などから威る
織布、不織布および紐あるいは岩綿などの繊維基材にフ
ッ素樹脂を含浸させたシール材は、耐熱性および耐薬品
性に優れているため、化学工業用のガスケット、パツキ
ンなどとして多用されている。Clear thoughts! The sealing materials made by impregnating fluororesin into fibrous base materials such as woven fabrics, non-woven fabrics, strings, and rock wool made of carbon fiber, glass fiber, and aramid fiber are heat resistant and resistant. Due to its excellent chemical properties, it is often used as gaskets and packing materials for the chemical industry.
このシール材は、従来から、フッ素樹脂微粒子を水に分
散させて得た水性ディスパージョンを繊維基材に含浸さ
せた後、得られた樹脂含浸基材を必要に応じて積層して
所定形状の金型内に装着し、次いで加熱加圧しフッ素樹
脂を焼成しながら成形して製造されている。このような
シール材は、繊維基材に含浸されるフッ素樹脂が均質で
なけれ（ｆ、充分なシール性を得ることができない。そ
こで、水性ディスパージョンには、水性ディスパージョ
ン中のフッ素樹脂を均一に水分散させるために、界面活
性剤を添加するのが一般的である。Conventionally, this sealing material has been produced by impregnating a fiber base material with an aqueous dispersion obtained by dispersing fine fluororesin particles in water, and then laminating the resulting resin-impregnated base materials as necessary to form a predetermined shape. It is manufactured by mounting it in a mold, then heating and pressurizing it, and molding it while baking the fluororesin. Such sealing materials cannot obtain sufficient sealing performance unless the fluororesin impregnated into the fiber base material is homogeneous (f). It is common to add a surfactant to water-disperse the liquid.
ところで、医薬品の製造、保存などの分野で用いるシー
ル材は、医薬品と直接接するため不純物あるいは毒物と
なる物質が医薬品中に溶出しない材質で形成されていな
ければならない。そこで、日本薬局方では、その指標の
一つとして過マンガン酸カリウム消費量を定めている。By the way, sealing materials used in the fields of manufacturing and preserving pharmaceuticals must be made of a material that does not elute impurities or toxic substances into the pharmaceuticals, since they come into direct contact with the pharmaceuticals. Therefore, the Japanese Pharmacopoeia defines potassium permanganate consumption as one of the indicators.
過マンガン酸カリウム消費量は、試料を精製水中に所定
時間漬け、次いでこの精製水中に含まれる不純物を過マ
ンガン酸カリウム水溶液により酸化適定して求めら札
日本薬局方で定められたこの過マンガン酸カリウム消費
量は６．３ｐｐｍ７１００ｍ １以下である。Potassium permanganate consumption is determined by soaking a sample in purified water for a specified period of time, and then oxidizing impurities contained in this purified water with an aqueous potassium permanganate solution.
The amount of potassium permanganate consumed as determined by the Japanese Pharmacopoeia is 6.3 ppm or less, 7100 m 1 or less.
しかしながら、フッ素樹脂の水性デイスパージョンを用
いて製造したシール材店 特に耐薬品性に優れる点では
医薬品を扱う分野で使用するのに適した素材であるもの
の、水性ディスパージョンに用いた界面活性剤および製
造工程中に混入する不純物などが含まれ 水などに溶出
し易く、そのため過マンガン酸カリウム消費量が上記値
を越えてしまう。したがって、このシール材には、医薬
品を扱う分野に使用できず、さらには食料品を扱う分野
においても好ましくないという問題があっ九
この問題を解決する一つの方法としては、水性ディスパ
ージョンに加える界面活性剤を少なくするかあるいは全
く無くす方法がある。ところがこのような方法では、過
マンガン酸カリウム消費量が上記値以下となるまで界面
活性剤の使用量を減少させると、フッ素樹脂の水分散性
が低下し、基材繊維に含浸されるフッ素樹脂が不均質と
なるため、充分なシール性を有するシール材が得られな
いという問題があっｔも
見里匁１迦
本発明は、このような従来技術に伴う問題点を解決しよ
うとするものであり、不純物あるいは毒物の水への溶出
が少なく医薬品および食料品を扱う分野に好適であり、
かつ充分なシール性を有したフッ素樹脂含有シール材の
製造方法を提供することを目的としている。However, although sealing materials manufactured using aqueous fluororesin dispersions are suitable for use in the pharmaceutical field due to their excellent chemical resistance, surfactants used in aqueous dispersions It also contains impurities mixed in during the manufacturing process and is easily eluted into water, etc. Therefore, the amount of potassium permanganate consumed exceeds the above value. Therefore, this sealant has the problem that it cannot be used in the field that handles pharmaceuticals, and it is also undesirable in the field that handles foodstuffs.One way to solve this problem is to There are ways to reduce or eliminate the activator. However, in this method, if the amount of surfactant used is reduced until the amount of potassium permanganate consumed is below the above value, the water dispersibility of the fluororesin decreases, and the fluororesin impregnated into the base fibers decreases. There is a problem that a sealing material having sufficient sealing properties cannot be obtained because of non-uniformity.The present invention is an attempt to solve the problems associated with such conventional techniques. It is suitable for fields that handle pharmaceuticals and food products because there is little elution of impurities or toxic substances into water.
Another object of the present invention is to provide a method for manufacturing a fluororesin-containing sealing material that has sufficient sealing properties.
及里二旦１
本発明に係るフッ素樹脂含有シール材の製造方法は、界
面活性剤とフッ素樹脂微粒子とを含有する水性ディスパ
ージョンを、繊維基材表面に含浸させる樹脂含浸工程と
、
上記樹脂含浸工程で得られた樹脂含浸基材を加熱加圧し
ながら成形する成形工程とを含むととも＆気
上記樹脂含浸工程で得られた樹脂含浸基材および上記成
形工程で得られた成形棒の少なくともいずれか一方を、
１００〜３００℃の温度に加熱する加熱処理工程を含
むことを特徴としている。Oiri Nidan 1 The method for producing a fluororesin-containing sealing material according to the present invention includes a resin impregnation step of impregnating the surface of a fiber base material with an aqueous dispersion containing a surfactant and fluororesin fine particles; and the resin impregnation step. a molding step of molding the resin-impregnated base material obtained in the step while heating and pressurizing; or one side,
It is characterized by including a heat treatment step of heating to a temperature of 100 to 300°C.
本発明に係るフッ素樹脂含有シール材の製造方法によれ
ば、上記樹脂含浸工程で界面活性剤を含んだ水性ディス
パージョンを用いるとともべ 上記加熱処理工程で樹脂
含浸基材および／または成形棒に含まれる界面活性剤お
よび不純物を分解しているために、繊維基材に含浸され
るフッ素樹脂が均質でシール性に優へ かつ接触する水
に不純物が溶出しにくいシール材を製造、することがで
きる、
日の 的な１日
以下本発明に係るシール材の製造方法を具体的に説明す
る。According to the method for manufacturing a fluororesin-containing sealing material according to the present invention, an aqueous dispersion containing a surfactant is used in the resin impregnation step, and the resin-impregnated base material and/or the molded rod is Because the surfactant and impurities contained in the product are decomposed, the fluororesin impregnated into the fiber base material is homogeneous and has excellent sealing properties, making it possible to produce a sealing material that is difficult for impurities to dissolve into the water it comes in contact with. The method for manufacturing the sealing material according to the present invention will be specifically described in less than one day.
本発明に係るシール材の製造方法では、原料として繊維
基材と、フッ素樹脂微粒子を含む水性デイスパージョン
を用いている。In the method for manufacturing a sealing material according to the present invention, a fiber base material and an aqueous dispersion containing fluororesin fine particles are used as raw materials.
本発明で用いられる繊維基材としては、具体的には、岩
線 石綿など以外に、炭素繊維、ガラス繊維などの無機
物繊維およびアラミド繊維などの有機物繊維から戒る織
布、不織布および紐などを用いることができる。Specifically, the fiber base materials used in the present invention include woven fabrics, non-woven fabrics, strings, etc., which are not inorganic fibers such as carbon fibers and glass fibers, and organic fibers such as aramid fibers, in addition to rock fibers and asbestos. Can be used.
水性ディスパージョンに加えられるフッ素樹脂微粒子の
素材としては、具体的には、ポリテトラフルオロエチレ
ン（ＰＴＦＥ）、テトラフルオロエチレンとへキサフル
オロプロピレンとの共重合体（ＦＥＰ） 、ポリクロロ
トリフルオロエチレン（ＣＴＦＥ） 、テトラフルオロ
エチレンとパーフルオロアルキルビニルエーテルとの共
重合体（ＰＦＡ）などを用いることができる。Specifically, materials for the fluororesin fine particles added to the aqueous dispersion include polytetrafluoroethylene (PTFE), copolymer of tetrafluoroethylene and hexafluoropropylene (FEP), polychlorotrifluoroethylene ( CTFE), a copolymer of tetrafluoroethylene and perfluoroalkyl vinyl ether (PFA), etc. can be used.
また、フッ素樹脂微粒子は、−次粒子径が通常０．５μ
ｍ以下、好ましくは０．２〜０．４μｍの粒径を有して
いることが望ましい。フッ素樹脂微粒子の粒径をこのよ
うな値とすることにより、少ない界面活性剤の使用量で
、フッ素樹脂微粒子を充分に分散させることができる。In addition, the fluororesin fine particles usually have a secondary particle diameter of 0.5μ.
It is desirable that the particle size be less than m, preferably 0.2 to 0.4 μm. By setting the particle size of the fluororesin fine particles to such a value, the fluororesin fine particles can be sufficiently dispersed with a small amount of surfactant.
このようなフッ素樹脂微粒子は、一般に乳化重合法によ
って得られる。Such fluororesin fine particles are generally obtained by emulsion polymerization.
また本発明では、水性ディスパージョンには、フッ素樹
脂微粒子の水分散性を向上させるために界面活性剤が加
えられている。このような界面活性剤としては、通常、
ポリオキシエチレンアルキルフェノールエーテル、ポリ
オキシエチレンアルキルエーテル、ポリオキシエチレン
アルキルエステル、ポリオキシエチレンアルキルアミン
、ポリオキシエチレンアルキルアミド、ソルビタンアル
キルエステル、ポリオキシエチレンソルビタンアルキル
エステルなどの非イオン性界面活性剤が好ましく用いら
也 このような界面活性剤は単独で用いても、複数組み
合わせて用いてもよい。Further, in the present invention, a surfactant is added to the aqueous dispersion in order to improve the water dispersibility of the fluororesin fine particles. Such surfactants are usually
Nonionic surfactants such as polyoxyethylene alkylphenol ether, polyoxyethylene alkyl ether, polyoxyethylene alkyl ester, polyoxyethylene alkylamine, polyoxyethylene alkylamide, sorbitan alkyl ester, polyoxyethylene sorbitan alkyl ester are preferred. These surfactants may be used alone or in combination.
なお本発明では、界面活性剤は、後に詳述する加熱処理
工程で、シール材からの溶出を防止でき、かつフッ素樹
脂微粒子の水分散性を充分向上させることができれば、
使用可能であり、特に限定されない。In the present invention, the surfactant can be used as long as it can prevent elution from the sealing material and sufficiently improve the water dispersibility of the fluororesin fine particles in the heat treatment step described in detail later.
It can be used and is not particularly limited.
本発明で用いられる水性デイスパージョンは、必要とあ
れば上記したようなフッ素樹脂微粒子および界面活性剤
以外に、無機充填弁Ｌ 顔料などを含んでいてもよい。The aqueous dispersion used in the present invention may contain, if necessary, an inorganic filling valve L pigment, etc., in addition to the above-mentioned fluororesin fine particles and surfactant.
このような水性ディスパージョン中、フッ素樹脂微粒子
は、５０〜７０重量％、好ましくは５５〜６５重量％の
量で用いられる。In such an aqueous dispersion, the fluororesin fine particles are used in an amount of 50 to 70% by weight, preferably 55 to 65% by weight.
また、界面活性剤は、水性ディスパージョン中、３〜９
重量％、好ましくは５〜７重量％の量で用いられる。In addition, the surfactant is 3-9% in the aqueous dispersion.
It is used in an amount of 5% to 7% by weight.
本発明に係るシール材の製造方法では、上記したような
繊維基材および水性ディスパージョンを用いた樹脂含浸
工程と、樹脂含浸工程で得られた樹脂含浸基材を成形し
て成形体を製造する成形工程とを含むとともに 上記樹
脂含浸基材および成形体の少なくともいずれか一方を所
定の温度で加熱する加熱処理工程とを含んでいる。The method for manufacturing a sealing material according to the present invention includes a resin impregnation step using a fiber base material and an aqueous dispersion as described above, and a molded body by molding the resin-impregnated base material obtained in the resin impregnation step. and a heat treatment step of heating at least one of the resin-impregnated base material and the molded article at a predetermined temperature.
樹脂含浸工程では、繊維基材に水性デイスパージョンが
含浸される力ｔ 具体的には、この樹脂含浸工程は、繊
維基材の表面に水性ディスパージョンを塗布するかある
いは繊維基材を水性ディスパージョンに浸漬することに
より行なわれる。In the resin impregnation process, the fiber base material is impregnated with an aqueous dispersion using a force t. This is done by immersing it in water.
フッ素樹脂が含浸された繊維基材は乾燥されるが、 こ
の含浸と乾燥とは複数回繰り返してもよい。The fiber base material impregnated with the fluororesin is dried, and this impregnation and drying may be repeated multiple times.
このようにして得られた樹脂含浸基材は、通常５０〜７
０重量％、好ましくは５５〜６５重量％の量でフッ素樹
脂を含んでいる。The resin-impregnated base material thus obtained usually has a 50 to 7
It contains fluororesin in an amount of 0% by weight, preferably 55-65% by weight.
また、樹脂含浸基材は、含浸前の繊維基材あるいは含浸
後に得られた樹脂含浸基材を打ち抜（などして、製造す
る成形体の形状に応じた形状とされる。Further, the resin-impregnated base material is shaped according to the shape of the molded article to be manufactured by punching out the fiber base material before impregnation or the resin-impregnated base material obtained after impregnation.
成形工程では、このような樹脂含浸基材を所定形状の金
型内で加熱加圧することにより、フッ素樹脂を焼成しな
がら成形して成形体が製造される。In the molding process, such a resin-impregnated base material is heated and pressurized in a mold having a predetermined shape, thereby molding the fluororesin while firing it to produce a molded body.
このような成形工程では、加熱温度は、フッ素樹脂の融
点以上、好ましくは３７０〜３９０℃であり、加圧面圧
は、通常３５０〜６００ ｋｇｆ／の２、好ましくは４
５０〜５００ ｋｇｆ／の２である。In such a molding process, the heating temperature is higher than the melting point of the fluororesin, preferably 370 to 390°C, and the pressing surface pressure is usually 350 to 600 kgf/2, preferably 4
50 to 500 kgf/2.
この際、単一の樹脂含浸基材を金型に装着し加圧圧縮す
れば単層の成形体を得ることができ、複数の樹脂含浸基
材を積層して金型内に装着し加圧圧縮すれば積層体と或
った成形体を得ることができる。また、成形体は、用い
る樹脂含浸基材を所定形状とすることにより、リング＆
Ｖ字＆Ｊ字状あるいはＬ字状など様々な形状とすること
ができる。At this time, a single-layer molded body can be obtained by mounting a single resin-impregnated base material in a mold and compressing it under pressure, or by stacking multiple resin-impregnated base materials and mounting it in a mold and pressurizing it. By compression, a laminate and a molded body can be obtained. In addition, by shaping the resin-impregnated base material into a predetermined shape, the molded body can be made into
It can be made into various shapes such as a V-shape, a J-shape, or an L-shape.
本発明に係るシール材の製造方法では、このような樹脂
含浸工程で得られた樹脂含浸基材および成形工程で得ら
れた成形体の少なくともいずれか一方を、通常１００〜
３００℃、好ましくは１９０〜２１０℃の温度に加熱す
る加熱処理工程を含んでいる。また、加熱処理は、通常
０．５〜２時間、好ましくは１〜１．５時間行なわれる
。In the method for manufacturing a sealing material according to the present invention, at least one of the resin-impregnated base material obtained in the resin impregnation step and the molded object obtained in the molding step is usually
It includes a heat treatment step of heating to a temperature of 300°C, preferably 190 to 210°C. Further, the heat treatment is usually carried out for 0.5 to 2 hours, preferably for 1 to 1.5 hours.
加熱温度を１００℃以下とすると、不純物の溶出が大き
く規定値を満足することができない。また、加熱温度を
３００℃以上とすると、成形時の材料の流れ不良や、層
間剥離が発生する可能性が大きく、シールの耐久性につ
いても悪い影響を及ぼす。If the heating temperature is 100° C. or lower, the elution of impurities will be large and the specified value will not be satisfied. Furthermore, if the heating temperature is 300° C. or higher, there is a high possibility that material flow failure during molding or delamination will occur, and the durability of the seal will also be adversely affected.
このような加熱処理を行なうことにより、樹脂含浸基材
または成形体に含まれる界面活性剤と樹脂含浸工程など
でディスパージョンに混入した不純物とを分解させるこ
とができ、したがって水などに界面活性剤および不純物
が溶出しにくいシール材を製造することができる。By performing such heat treatment, it is possible to decompose the surfactant contained in the resin-impregnated base material or molded object and the impurities mixed into the dispersion during the resin impregnation process, and therefore, the surfactant is dissolved in water etc. Also, it is possible to produce a sealing material in which impurities are difficult to elute.
見里込皇（
本発明に係るフッ素樹脂含有シール材の製造方法によれ
１ｆ、樹脂含浸工程で界面活性剤を含んだ水性ディスパ
ージョンを用い、かつ上記加熱処理工程で樹脂塗布繊維
基材および／または成形体に含まれる界面活性剤および
不純物を分解しているため、繊維基材に含浸されるフッ
素樹脂が均質でシール性に優ね かつ接触する水に不純
物が溶出しに＜＜、シたがって医薬品あるいは食品など
の分野で用いられるパツキン、ガスケットなどに好適な
シール材を提供することができる。According to the method for manufacturing a fluororesin-containing sealing material according to the present invention, an aqueous dispersion containing a surfactant is used in the resin impregnation step, and a resin-coated fiber base material and/or a resin-coated fiber base material is used in the heat treatment step. Or, because the surfactant and impurities contained in the molded article are decomposed, the fluororesin impregnated into the fiber base material is homogeneous and has excellent sealing properties, and the impurities are not eluted into the water that comes into contact with it. Thus, it is possible to provide a sealing material suitable for packings, gaskets, etc. used in fields such as pharmaceuticals and foods.
ＩＬ倒
以下、本発明に係るシール材の製造方法を実施例に基づ
き説明する。EXAMPLES Below, a method for manufacturing a sealing material according to the present invention will be described based on examples.
なお、過マンガン酸カリウム消費量は以下のようにして
測定および算出した
（１）試料１個に付き１００ｍ１の精製水を加え、９５
℃の温度で１時間加熱した後、室温となるまで放置し
ついで速やかに試料を取り出し得られた液を試験液とす
る。The amount of potassium permanganate consumed was measured and calculated as follows: (1) 100ml of purified water was added to each sample,
After heating at a temperature of ℃ for 1 hour, leave it until it reaches room temperature.
Then, quickly take out the sample and use the obtained liquid as the test liquid.
（２）試験液１００ｍ１ｋ； 過マンガン酸カリウム
および希硫酸を加えて３分間煮沸した後、シュウ酸ナト
リウムを加える。得られた溶液に０．０１規定の過マン
ガン酸カリウム溶液を滴下し、この溶液の使用量を計測
する。(2) Test solution 100ml; Add potassium permanganate and dilute sulfuric acid, boil for 3 minutes, and then add sodium oxalate. A 0.01 N potassium permanganate solution is added dropwise to the obtained solution, and the amount of this solution used is measured.
（３）蒸留水１００ｍ１を用いて、同様にして滴下した
過マンガン酸カリウム溶液の使用量を計測する。(3) Using 100 ml of distilled water, measure the amount of potassium permanganate solution dropped in the same manner.
（４） （２）で得られた過マンガン酸カリウム溶液使
用量ａと、（３）で得られた過マンガン酸カリウム溶液
使用量すから、以下の式にしたがって過マンガン酸カリ
ウム消費量Ｍを算出しｔう
ただｌ、、ｆは１規定過マンガン酸カリウム溶液のファ
クターである。(4) From the usage amount a of the potassium permanganate solution obtained in (2) and the usage amount of the potassium permanganate solution obtained in (3), calculate the potassium permanganate consumption amount M according to the following formula. The calculated values t, , and f are factors for 1N potassium permanganate solution.
失羞１１
炭素繊維からな・る織布に、６０重量％のＰＴＦＥ微粒
子（粒径０．４μｍ以下）と、５重量％のポリオキシエ
チレンアルキルフェノールエーテルとを含む水性ディス
パージョンを３回塗布獣 自然乾燥することにより、フ
ッ素樹脂を６０重量％含む樹脂含浸基材を調製した
得られた樹脂含浸基材に電気炉中で２００℃の温度で１
時間加熱処理を施し九
次いで、この樹脂含浸基材をリング状に打ち抜き、５枚
積眉して予備成形体とし この予備成形体を金型内に装
着して、温度３８０℃、圧力５００ ｋｇ／■２で加熱
加圧成形して成形体を得らこの成形体に電気炉中で２０
０℃の温度で１時間加熱処理を施し氾
量を求めら 結果を表１に示す。Shredding 11 A woven fabric made of carbon fiber is coated three times with an aqueous dispersion containing 60% by weight of PTFE fine particles (particle size of 0.4 μm or less) and 5% by weight of polyoxyethylene alkylphenol ether. By drying, a resin-impregnated base material containing 60% by weight of fluororesin was prepared.
The resin-impregnated base material was subjected to heat treatment for 9 hours, and then punched out into a ring shape. Five sheets were stacked together to form a preform. This preform was placed in a mold at a temperature of 380°C and a pressure of 500 kg/ ■2) Heat and pressure mold to obtain a molded product.
Heat treatment was performed at a temperature of 0°C for 1 hour, and the amount of flooding was determined. The results are shown in Table 1.
失羞１４
樹脂含浸基材に加熱処理を施さなかった以外は、実施例
１と同様にしてシール材を製造し氾得られたシール材の
過マンガン酸カリウム消費量を求めあ 結果を表１に示
す。14 A sealing material was produced in the same manner as in Example 1, except that the resin-impregnated base material was not heat-treated, and the amount of potassium permanganate consumed in the obtained sealing material was determined. The results are shown in Table 1. show.
失嵐男」
成形体に加熱処理を施さなかった以外は、実施例１と同
様にしてシール材を製造しｔう得られたシール材の過マ
ンガン酸カリウム消費量を求めｔラ 結果を表１に示
す。A sealing material was produced in the same manner as in Example 1, except that the molded body was not subjected to heat treatment.The potassium permanganate consumption of the obtained sealing material was determined.The results are shown in Table 1. Shown below.
比較例１
樹脂含浸基材および成形体に加熱処理を施さなかった以
外は、実施例１と同様にしてシール材を製造した
得られたシール材の過マンガン酸カリウム消費量を求め
氾 結果を表１に示す。Comparative Example 1 A sealing material was produced in the same manner as in Example 1, except that the resin-impregnated base material and the molded body were not heat-treated.The potassium permanganate consumption of the obtained sealing material was determined and the results are shown. Shown in 1.
得られたシール材の過マンガン酸カリウム消ｔ表 １Potassium permanganate table for the obtained sealant 1
Claims (1)
パージョンを、繊維基材に含浸させる樹脂含浸工程と、 上記樹脂含浸工程で得られた樹脂含浸基材を加熱加圧し
ながら成形する成形工程とを含むとともに、 上記樹脂含浸工程で得られた樹脂含浸基材および上記成
形工程で得られた成形体の少なくともいずれか一方を、
１００〜３００℃の温度に加熱する加熱処理工程を含む
ことを特徴とするシール材の製造方法。[Claims] A resin impregnation step in which a fiber base material is impregnated with an aqueous dispersion containing a surfactant and fluororesin fine particles, and a resin impregnated base material obtained in the resin impregnation step is heated and pressurized. a molding step of molding at least one of the resin-impregnated base material obtained in the resin impregnation step and the molded object obtained in the molding step,
A method for manufacturing a sealing material, comprising a heat treatment step of heating to a temperature of 100 to 300°C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5594890A JP2904852B2 (en) | 1990-03-07 | 1990-03-07 | Manufacturing method of sealing material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5594890A JP2904852B2 (en) | 1990-03-07 | 1990-03-07 | Manufacturing method of sealing material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03258887A true JPH03258887A (en) | 1991-11-19 |
| JP2904852B2 JP2904852B2 (en) | 1999-06-14 |
Family
ID=13013298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5594890A Expired - Lifetime JP2904852B2 (en) | 1990-03-07 | 1990-03-07 | Manufacturing method of sealing material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2904852B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06179865A (en) * | 1992-11-05 | 1994-06-28 | Hideaki Kanematsu | Packing material for combustion apparatus and its production |
-
1990
- 1990-03-07 JP JP5594890A patent/JP2904852B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06179865A (en) * | 1992-11-05 | 1994-06-28 | Hideaki Kanematsu | Packing material for combustion apparatus and its production |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2904852B2 (en) | 1999-06-14 |
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