EP0916001B1 - Gasket paper - Google Patents
Gasket paper Download PDFInfo
- Publication number
- EP0916001B1 EP0916001B1 EP97926103A EP97926103A EP0916001B1 EP 0916001 B1 EP0916001 B1 EP 0916001B1 EP 97926103 A EP97926103 A EP 97926103A EP 97926103 A EP97926103 A EP 97926103A EP 0916001 B1 EP0916001 B1 EP 0916001B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mixture
- binder
- silicate mineral
- inorganic binder
- polymeric binder
- 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.)
- Expired - Lifetime
Links
- 239000000203 mixture Substances 0.000 claims description 30
- 239000011230 binding agent Substances 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 14
- 229910052604 silicate mineral Inorganic materials 0.000 claims description 13
- 229920003235 aromatic polyamide Polymers 0.000 claims description 12
- 239000004760 aramid Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 7
- 239000008119 colloidal silica Substances 0.000 claims description 7
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 7
- 229920000459 Nitrile rubber Polymers 0.000 claims description 6
- 235000011128 aluminium sulphate Nutrition 0.000 claims description 5
- 229910000329 aluminium sulfate Inorganic materials 0.000 claims description 4
- 229960000892 attapulgite Drugs 0.000 claims description 4
- 229910052625 palygorskite Inorganic materials 0.000 claims description 4
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 229940037003 alum Drugs 0.000 claims description 2
- 239000004927 clay Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 238000001556 precipitation Methods 0.000 claims description 2
- 239000006228 supernatant Substances 0.000 claims description 2
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims 1
- 238000001354 calcination Methods 0.000 claims 1
- 238000007789 sealing Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 239000010427 ball clay Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000000945 filler Substances 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 238000009472 formulation Methods 0.000 description 4
- 229920000126 latex Polymers 0.000 description 3
- 239000004816 latex Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 230000002528 anti-freeze Effects 0.000 description 2
- 239000010425 asbestos Substances 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 229910052895 riebeckite Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
- D21H13/10—Organic non-cellulose fibres
- D21H13/20—Organic non-cellulose fibres from macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H13/26—Polyamides; Polyimides
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
- D21H17/68—Water-insoluble compounds, e.g. fillers, pigments siliceous, e.g. clays
Definitions
- This invention relates to papers particularly, but not exclusively, suitable for use in fluid sealing applications such as cylinder head gaskets. It is known to make gasket papers from non-asbestos formulations based on other fibres such as glass fibres and/or mineral fibres and including a minor proportion of cellulose as a web-forming agent.
- GB-A-2138854 and 2138855 disclose cellulose-containing compositions using ball clay as a filler.
- GB-A-2250302 discloses a gasket material which is cellulose-free and which includes a carefully selected mixture of calcined china clay and ball clay as filler.
- GB-A-2254346 discloses a high temperature gasket material including glass or carbon fibre staples and temperature tolerants. fillers.
- GB-A-2093474 and EP-A2-0522441 disclose compositions including aramid fibre staple materials.
- a method of manufacture of a paper stock for dewatering to paper comprising, by weight, 4-15% aramid fibre pulp, 60-90% silicate mineral, 4-10% polymeric binder, and 2-15% inorganic binder, comprises the steps set out in the precharaterising part of claim 1 further characterised by producing a first mixture containing said aramid fibres and silicate mineral prior to adding the inorganic binder thereto and, prior to adding said inorganic binder, adding to said first mixture a 10% solution of papermakers alum such that the dry content is 1% of the total composition and agitating the mixture to prepare the surface of the silicate mineral by said alum to receive the inorganic binder, and, after addition of said inorganic binder, adding said polymeric binder having a solid content of 50% by weight and dispersing said polymeric binder in the mixture without precipitation thereof.
- At least some of the silicate mineral is constituted by attapulgite.
- the inorganic binder is preferably colloidal silica.
- the polymeric material is preferably nitrile rubber.
- a particularly preferred paper according to the inventive method comprises by weight, 4-8% aramid fibre pulp, 5-8% polymeric binder, 75-87% silicate mineral and 4-10% colloidal silica. It will be appreciated that in the present context "aramid” is a reference to polyaromatic amide material.
- the formulations of the present invention may be used in at least two different ways.
- the use of calcined china clay in combination with colloidal silica lends itself to the product of a paper which can be impregnated with a silicone or other resin such as polybutadiene in order to enhance resistance to and sealabilty against fluids such as water-antifreeze mixtures and oil.
- a paper which can be impregnated with a silicone or other resin such as polybutadiene in order to enhance resistance to and sealabilty against fluids such as water-antifreeze mixtures and oil.
- attapulgite it is possible to produce a paper which swells when exposed to water.
- Such papers can be used without a resin impregnation treatment.
- the process of the invention leads to a paper stock which is capable of producing gaskets both with and without a post-treatment with a resin impregnant.
- testing was carried out by bonding the test paper to both sides of a plain steel core, blanking out annular samples of inside diameter 14.7mm and outside diameter 34.5mm. These were then tested, again based on ASTM F1276, by applying an initial stress of 58.6 MPa. After 22 hours at 300°C the residual stress was measured, the stress relaxation calculated and then normalised to a paper thickness of 1.0mm, in the usual way. This procedure was used throughout the following Examples, including tests on paper made according to prior art.
- a paper was made having the following composition: % by dry weight Fibrillated Aramid Fibre Pulp 8 Calcined China Clay 76 Nitrile Rubber 6 Colloidal Silica 10
- the aramid fibres were dispersed in water to give a slurry of around 2% solids content by weight. This pulp had a freeness of 50°SR. The pulp was transferred to a mixing vessel and further diluted with water at 40°C. The calcined china clay was added and the mixture agitated. Further water was added to give a slurry having a solids content of approximately 4% by weight. A 10% solution of papermakers alum was added such that the dry content was approximately 1% of the total composition. The mixture was agitated for 2 minutes before adding the colloidal silica as a 30% solids content suspension. The mixture was agitated for a further 5 minutes and nitrile rubber added in latex form, having a solids content of around 50%.
- the nitrile rubber latex was diluted 5:1 with water before adding to the mix. When fully dispersed the latex was then caused to precipitate onto the fibres and fillers by the addition of a further quantity of papermakers alum solution until the supernatant liquid became clear.
- a paper was produced from the above stock by the conventional technique of dewatering on a wire mesh, pressing and drying, a polyacrylamide flocculant was used to aid processing.
- the paper was subsequently calendered to the required density using a conventional 2-bowl calender.
- the resulting paper had the following properties: Thickness 0.83mm Substance 920gm -2 Density 1100kgm -3 Tensile Strength 4.2 MPa Compression at 34.5 MPa 14.3% Stress Relaxation 24.8%
- a conventional paper made according to GB 2250302 showed a stress relaxation of 42% by the same test method.
- a paper was prepared largely as described above from the following formulation. % by dry weight Fibrillated Aramid Fibre Pulp 4 Calcined China Clay 30 Attapulgite 50 Colloidal Silica 10 Nitrile Rubber 6
- the paper had the following properties: Thickness 0.65mm Substance 860gm -2 Density 1330kgm -3 Tensile Strength 7.0 MPa Compression at 34.5 MPa 15.3% Stress Relaxation 29.8%
- a sealing test was carried out as described above and the paper was found to seal an internal pressure of 10 bar without detectable leakage at a sealing stress of 10.3 MPa.
- the paper also sealed 10 bar fluid pressure at a reduced sealing stress of 3.4 MPa.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Paper (AREA)
- Sealing Material Composition (AREA)
- Materials For Medical Uses (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9613456A GB2314569B (en) | 1996-06-27 | 1996-06-27 | Gasket paper |
GB9613456 | 1996-06-27 | ||
PCT/GB1997/001587 WO1997049864A1 (en) | 1996-06-27 | 1997-06-12 | Gasket paper |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0916001A1 EP0916001A1 (en) | 1999-05-19 |
EP0916001B1 true EP0916001B1 (en) | 2001-05-23 |
Family
ID=10795958
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97926103A Expired - Lifetime EP0916001B1 (en) | 1996-06-27 | 1997-06-12 | Gasket paper |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP0916001B1 (ja) |
JP (1) | JP2000513053A (ja) |
KR (1) | KR20000015807A (ja) |
AU (1) | AU713243B2 (ja) |
BR (1) | BR9709944A (ja) |
DE (1) | DE69704947T2 (ja) |
GB (1) | GB2314569B (ja) |
WO (1) | WO1997049864A1 (ja) |
ZA (1) | ZA975620B (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011053389A1 (de) * | 2011-09-08 | 2013-03-14 | Elringklinger Ag | Dichtungsanordnung und Verfahren zur Herstellung derselben |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4271228A (en) * | 1980-02-04 | 1981-06-02 | Hollingsworth & Vose Company | Sheet material containing exfoliated vermiculite |
US4330442A (en) * | 1980-05-07 | 1982-05-18 | Armstrong World Industries, Inc. | Asbestos free gasket forming compositions |
GB2093474B (en) * | 1981-02-10 | 1984-10-24 | Texon Inc | High temperature resistant gasketing material incorporating organic fibers |
GB2138854B (en) * | 1983-04-27 | 1986-03-26 | T & N Materials Res Ltd | Gasket paper |
GB2138855B (en) * | 1983-04-27 | 1986-03-26 | T & N Materials Res Ltd | Gasket paper |
US4786670A (en) * | 1987-01-09 | 1988-11-22 | Lydall, Inc. | Compressible non-asbestos high-temperature sheet material usable for gaskets |
GB9025983D0 (en) * | 1990-11-29 | 1991-01-16 | T & N Technology Ltd | Non-asbestos flexible sheet material |
GB9106806D0 (en) * | 1991-04-02 | 1991-05-22 | T & N Technology Ltd | Non-asbestos flexible sheet material |
DE4113153A1 (de) * | 1991-04-23 | 1992-10-29 | Du Pont Int | Industriedichtung fuer den einsatz mit dampf |
DE4122737A1 (de) * | 1991-07-10 | 1993-01-14 | Akzo Nv | Zusammensetzung mit kurzfasern aus aramid |
-
1996
- 1996-06-27 GB GB9613456A patent/GB2314569B/en not_active Expired - Fee Related
-
1997
- 1997-06-12 EP EP97926103A patent/EP0916001B1/en not_active Expired - Lifetime
- 1997-06-12 KR KR1019980709356A patent/KR20000015807A/ko not_active Application Discontinuation
- 1997-06-12 AU AU30990/97A patent/AU713243B2/en not_active Ceased
- 1997-06-12 DE DE69704947T patent/DE69704947T2/de not_active Expired - Fee Related
- 1997-06-12 JP JP10502481A patent/JP2000513053A/ja active Pending
- 1997-06-12 BR BR9709944A patent/BR9709944A/pt unknown
- 1997-06-12 WO PCT/GB1997/001587 patent/WO1997049864A1/en not_active Application Discontinuation
- 1997-06-25 ZA ZA9705620A patent/ZA975620B/xx unknown
Also Published As
Publication number | Publication date |
---|---|
ZA975620B (en) | 1997-12-29 |
AU713243B2 (en) | 1999-11-25 |
GB9613456D0 (en) | 1996-08-28 |
DE69704947T2 (de) | 2001-09-06 |
DE69704947D1 (de) | 2001-06-28 |
GB2314569A (en) | 1998-01-07 |
WO1997049864A1 (en) | 1997-12-31 |
BR9709944A (pt) | 1999-08-10 |
JP2000513053A (ja) | 2000-10-03 |
AU3099097A (en) | 1998-01-14 |
EP0916001A1 (en) | 1999-05-19 |
KR20000015807A (ko) | 2000-03-15 |
GB2314569B (en) | 2000-01-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5536565A (en) | Liquid sealing gasket sheet materials | |
US4529663A (en) | Flexible, asbestos-free gasket material | |
FI71800C (fi) | Flexibelt arkmaterial. | |
US4786670A (en) | Compressible non-asbestos high-temperature sheet material usable for gaskets | |
US4748075A (en) | Flat sealing material made of a soft substance, particularly for the production of gaskets that are to be subjected to high stresses | |
US4271228A (en) | Sheet material containing exfoliated vermiculite | |
US5294300A (en) | Production method of expanded graphite sheet and expanded graphite sheet obtained thereby | |
EP0646101B1 (en) | Non-asbestos flexible sheet material | |
CA2177689C (en) | Soft sealing material free of asbestos and other inorganic fibres | |
EP0023512A1 (en) | FILM MATERIAL WITH PEELED VERMICULIT. | |
EP0916001B1 (en) | Gasket paper | |
EP0043679B1 (en) | Flexible sheet material | |
JP2931882B2 (ja) | 膨張黒鉛シートの製造法 | |
GB2047298A (en) | Gasket Material | |
GB2138854A (en) | Gasket paper | |
GB2037343A (en) | Gasket Material and Method of Manufacture Thereof | |
EP0027706A1 (en) | Latex bound non-asbestos paper | |
GB2250302A (en) | Gasket paper | |
GB2118985A (en) | Gasket material and method of manufacture thereof | |
GB2061344A (en) | Paper | |
JPH069253A (ja) | シール材組成物およびその製造方法 | |
CN1223704A (zh) | 衬垫用纸 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19981113 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE ES FR GB IT SE |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: FEDERAL-MOGUL TECHNOLOGY LIMITED. |
|
17Q | First examination report despatched |
Effective date: 19990729 |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE ES FR GB IT SE |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 20010625 Year of fee payment: 5 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 20010628 Year of fee payment: 5 |
|
REF | Corresponds to: |
Ref document number: 69704947 Country of ref document: DE Date of ref document: 20010628 |
|
ET | Fr: translation filed | ||
ITF | It: translation for a ep patent filed | ||
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20010823 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20011130 |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20030501 Year of fee payment: 7 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20030602 Year of fee payment: 7 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20030630 Year of fee payment: 7 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20040612 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20050101 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20040612 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20050228 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20050612 |