EP0392682B1 - Paper machine pressing fabrics - Google Patents
Paper machine pressing fabrics Download PDFInfo
- Publication number
- EP0392682B1 EP0392682B1 EP90303023A EP90303023A EP0392682B1 EP 0392682 B1 EP0392682 B1 EP 0392682B1 EP 90303023 A EP90303023 A EP 90303023A EP 90303023 A EP90303023 A EP 90303023A EP 0392682 B1 EP0392682 B1 EP 0392682B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fibers
- polyamide
- phenol
- intrinsic viscosity
- aldehyde
- 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
- 239000004744 fabric Substances 0.000 title claims description 50
- 238000003825 pressing Methods 0.000 title claims description 25
- 229920002647 polyamide Polymers 0.000 claims abstract description 41
- 239000004952 Polyamide Substances 0.000 claims abstract description 40
- 238000000034 method Methods 0.000 claims abstract description 31
- 238000011282 treatment Methods 0.000 claims abstract description 27
- 230000008569 process Effects 0.000 claims abstract description 24
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 12
- 239000000835 fiber Substances 0.000 claims description 68
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 22
- 150000001412 amines Chemical group 0.000 claims description 22
- 150000001299 aldehydes Chemical class 0.000 claims description 16
- GHMLBKRAJCXXBS-UHFFFAOYSA-N resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 claims description 6
- 229920002302 Nylon 6,6 Polymers 0.000 claims description 5
- 239000007864 aqueous solution Substances 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 5
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 claims description 4
- YCIMNLLNPGFGHC-UHFFFAOYSA-N catechol Chemical compound OC1=CC=CC=C1O YCIMNLLNPGFGHC-UHFFFAOYSA-N 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 150000002989 phenols Chemical class 0.000 claims description 4
- WQGWDDDVZFFDIG-UHFFFAOYSA-N pyrogallol Chemical compound OC1=CC=CC(O)=C1O WQGWDDDVZFFDIG-UHFFFAOYSA-N 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 229960001755 resorcinol Drugs 0.000 claims description 3
- UMHJEEQLYBKSAN-UHFFFAOYSA-N Adipaldehyde Chemical compound O=CCCCCC=O UMHJEEQLYBKSAN-UHFFFAOYSA-N 0.000 claims description 2
- SXRSQZLOMIGNAQ-UHFFFAOYSA-N Glutaraldehyde Chemical compound O=CCCCC=O SXRSQZLOMIGNAQ-UHFFFAOYSA-N 0.000 claims description 2
- WSMYVTOQOOLQHP-UHFFFAOYSA-N Malondialdehyde Chemical compound O=CCC=O WSMYVTOQOOLQHP-UHFFFAOYSA-N 0.000 claims description 2
- JPYHHZQJCSQRJY-UHFFFAOYSA-N Phloroglucinol Natural products CCC=CCC=CCC=CCC=CCCCCC(=O)C1=C(O)C=C(O)C=C1O JPYHHZQJCSQRJY-UHFFFAOYSA-N 0.000 claims description 2
- PCSMJKASWLYICJ-UHFFFAOYSA-N Succinic aldehyde Chemical compound O=CCCC=O PCSMJKASWLYICJ-UHFFFAOYSA-N 0.000 claims description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 2
- ZNWNWEHQFXOPGK-UHFFFAOYSA-N decanedial Chemical compound O=CCCCCCCCCC=O ZNWNWEHQFXOPGK-UHFFFAOYSA-N 0.000 claims description 2
- LEQAOMBKQFMDFZ-UHFFFAOYSA-N glyoxal Chemical compound O=CC=O LEQAOMBKQFMDFZ-UHFFFAOYSA-N 0.000 claims description 2
- 229960004337 hydroquinone Drugs 0.000 claims description 2
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 claims description 2
- OADYBSJSJUFUBR-UHFFFAOYSA-N octanedial Chemical compound O=CCCCCCCC=O OADYBSJSJUFUBR-UHFFFAOYSA-N 0.000 claims description 2
- QCDYQQDYXPDABM-UHFFFAOYSA-N phloroglucinol Chemical compound OC1=CC(O)=CC(O)=C1 QCDYQQDYXPDABM-UHFFFAOYSA-N 0.000 claims description 2
- 229960001553 phloroglucinol Drugs 0.000 claims description 2
- 229940079877 pyrogallol Drugs 0.000 claims description 2
- 125000003277 amino group Chemical group 0.000 abstract 1
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 abstract 1
- 239000010421 standard material Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000000126 substance Substances 0.000 description 7
- 239000004677 Nylon Substances 0.000 description 6
- 229920001778 nylon Polymers 0.000 description 6
- 230000015556 catabolic process Effects 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- IXWOUPGDGMCKGT-UHFFFAOYSA-N 2,3-dihydroxybenzaldehyde Chemical compound OC1=CC=CC(C=O)=C1O IXWOUPGDGMCKGT-UHFFFAOYSA-N 0.000 description 1
- VPWNQTHUCYMVMZ-UHFFFAOYSA-N 4,4'-sulfonyldiphenol Chemical class C1=CC(O)=CC=C1S(=O)(=O)C1=CC=C(O)C=C1 VPWNQTHUCYMVMZ-UHFFFAOYSA-N 0.000 description 1
- 229930185605 Bisphenol Natural products 0.000 description 1
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 1
- 229920002292 Nylon 6 Polymers 0.000 description 1
- 239000005708 Sodium hypochlorite Substances 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 206010061592 cardiac fibrillation Diseases 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 239000007859 condensation product Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002600 fibrillogenic effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- NXPPAOGUKPJVDI-UHFFFAOYSA-N naphthalene-1,2-diol Chemical class C1=CC=CC2=C(O)C(O)=CC=C21 NXPPAOGUKPJVDI-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 125000000446 sulfanediyl group Chemical group *S* 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/39—Aldehyde resins; Ketone resins; Polyacetals
- D06M15/41—Phenol-aldehyde or phenol-ketone resins
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
- D01F6/60—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyamides
Definitions
- This invention relates to paper machine pressing fabrics and has particular reference to paper machine pressing fabrics formed of a polyamide material and having improved longevity and resistance to flattening in the surface layer.
- a slurry of paper making constituents referred to as "furnish” is deposited on a forming fabric or "wire” and the liquid constituent of the furnish is drawn or extracted through the fabric or wire to produce a self-cohesive sheet.
- This self-cohesive sheet is then passed to a pressing and then a drying section of the paper making machine.
- the paper sheet is transported by a pressing fabric to a pair of rollers where the fabric and the paper sheet pass between the nip of the rollers to dewater by mechanical pressure the paper sheet.
- the paper sheet itself may contain other types of chemical finishes and additives and could be, at the same time, subjected to an elevated temperature in order to aid the dewatering.
- the paper making pressing fabric together with its sheet of paper tends, therefore, to be subjected to immense pressure at elevated temperatures in a rigorous chemical environment.
- Paper making pressing fabrics are generally produced by needling batt fiber to a woven base fabric. The fabric has multiple functions: first, to support the formed paper sheet through the press section of the machine; secondly, to accept sheet water expressed at each press nip; and last, to impart a finish or surface texture to the paper sheet.
- the batt fiber layer constitutes a "cushion" and support for the paper sheet while the woven base provides the primary channels or voids to accept expressed sheet water.
- the quality of the batt fiber layer and in particular its surface properties and its consistency of surface properties with time, is of extreme importance. As the surface properties of the batt fiber layer deteriorates, so does the quality of the surface of the paper sheet being pressed, as well as, the uniformity of water removal.
- the batt fibers are bent and deformed under great pressure and at great frequency. Hence the mechanical properties of the batt fiber are of considerable importance in such processes.
- Polyamide 6 and polyamide 6,6 have been used extensively in the manufacture of paper machine pressing fabrics. These polymers are readily formable as fibers and their fiber characteristics can be controlled to make acceptable paper making pressing fabrics.
- PA polyamide
- United States Patent Specification No. US-A-2,434,247 relates to the modification of synthetic linear polyamides with formaldehyde and an alcohol to obtain a more elastic nylon for woven fabrics.
- United States Patent Specification No. US-A-2,430,953 is concerned with producing nylon yarns with a softer hand, better drape, and in addition, a higher melting point, better dye receptivity and increased resistnce to solvents.
- the polyamide yarns are reacted with formaldehyde at a pH below 3 in alcohol.
- United States Patent Specification No. US-A-2,425,334 relates to modification of polyamides with formaldehyde at a pH less than 3 so that they can be cold drawn by no more than 75% of their original lengths.
- United States Patent Specification No. US-A-3,276,839 describes a process for finishing and dyeing synthetic nylon textile materials in the presence of phenol and an aliphatic anion-active compound in alkaline medium.
- United States Patent Specification No. US-A-3,322,488 refers to sulfomethylated bisphenol-formaldehyde condensation products used as dye resists for synthetic polyamide fibers.
- United States Patent Specification No. US-A-2,533,100 relates to a process for treating synthetic linear polyamides with thio derivatives of phenols or their corresponding reduction products.
- United States Patent Specification No. US-A-2,388,676 is concerned with improving the light stability of polyamide fibers by forming a catecholaldehyde resin within the nylon.
- nylon materials exhibit improved properties for use in apparrel or decorative assembly, i.e. use in conditions that will not be subjected to the agressive physical and chemical environment of a paper making machine.
- US-A-3 032 441 discloses a process for treating an open-weave fabric of, for example, nylon yarns comprising applying a phenolic-aldehyde resin and then an amino-aldehyde resin to the fabric, preferably in amounts of 5 - 10% and 10 - 20%, respectively, before curing the resin coating thereon.
- the process improves the fabric's dimensional stability, abrasion-resistance and stiffness and may be used to treat a Fourdrinier cloth.
- the present applicant has discovered that a paper making pressing fabric using fibers of various polyamides having an increased amine end group concentration can be further processed and modified to produce significantly improved properties.
- the present invention provides a polymeric material from the family of polyamides, in which said polymeric material is obtainable by subjecting a polyamide having an amine end group concentration of at least 60 equivalents/106g to a phenol/aldehyde treatment process, the conditions of said treatment process being such that the intrinsic viscosity is increased by at least 4% compared with the intrinsic viscosity of the untreated polyamide.
- the polymeric material has subsequent to said phenol/aldehyde treatment process been exposed to a heat treatment to further increase the intrinsic viscosity by at least 4%.
- Said polymeric material may be in the form of fibers.
- the invention further provides a pressing fabric composed of said fibers.
- a paper making pressing fabric comprising a fiber layer formed of polymeric fibers, in which said fibers are obtainable from polyamide fibers having an end group concentration such that the amine end group/carboxy end group ratio is greater than 1 by subjecting the polyamide fibers to a phenol/aldehyde treatment process which increases the intrinsic viscosity by at least 4% compared with the intrinsic viscosity of the untreated polyamide fibers.
- the amine end group concentration of the polyamide fibers before said phenol/aldehyde treatment is at least 60 equivalents/106g.
- the polyamide may be polyamide 6,6. Where the polyamide is polyamide 6,6, the intrinsic viscosity after the treatment process is preferably not less than 1.3 dl/g.
- Said fiber layer may be just the surface layer or layers of a batt structure and/or any portion of a batt up to 100% of the batt structure.
- the fiber layer may be on a base fabric.
- a method of making a paper making pressing fabric wherein polyamide fibers having an amine end group concentration of at least 60 equivalent/106 gram are subjected to an aldehyde/phenol treatment process in which the fibers are contacted with an aqueous solution of an aldehyde at an elevated temperature and with an aqueous solution of a phenol at an elevated temperature, the treatment process being carried out at a temperature for a time sufficient to impart an increase in intrinsic viscosity of the polyamide of at least 4%, and thereafter forming a layer of said fibers and needling the layer onto a woven base fabric.
- the fibers may be formed into a batt layer prior to attaching to the base fabric either before or after the aldehyde/phenol treatment process.
- the woven base fabrics contain yarns of monofilament, multifilament, or spun from staple fibers, that are usually polyamide based
- the technology of the present invention can be utilized for these yarn forms since they are also exposed to the heat, pressure and chemical environment already described. Benefits of dimensional stability, strength retention and maintenance of water handling capacity are all vital, and will be improved using yarns prepared by this invention.
- fiber should also not be limited in the sense of size dimensions or shape, but be considered a component. In this sense, therefore, for the purposes of this specification, the use of the term “fiber” should also include “yarns”.
- Phenols which can be used in this process include phenol, pyrocatechol, resorcinol, hydroquinone, pyrogallol and phloroglucinol, as well as, substituted products of the aforementioned compounds provided at least two reactive sites are left open on the aromatic ring.
- bisphenols, dihydroxy-naphthalenes and the like could also be utilized.
- Aldehydes applicable to this process are formaldehyde, formaldehyde liberating compounds, oxaldehyde, malonaldehyde, succinaldehyde, glutaraldehyde, adipaldehyde, pimelaldehyde, suberaldehyde, azelaldehyde and sebacaldehyde, and the like, as well as their substituted counterparts.
- the treated polyamide batt fibers show an increase in intrinsic viscosity up to 25% depending on the phenolic compound and subsequent heat treatment employed. These fibers also exhibit higher wet elongations relative to standard polyamide fibers both before, but especially after the treatment process. There is also a significant improvement in chemical resistance particularly in terms of resistance to degradation of physical properties caused by oxidation by chlorine containing compounds during use on a paper making machine. Fibers also show increased resistance to abrasion resulting from the pressing of papers containing fillers, such as ground calcium carbonate. Such pressing fabrics have exhibited as much as 100% longer lifetime in use, particularly in hostile chemical and mechanically abrasive environments.
- Polyamide 6,6 15d staple fiber having an amine end group concentration of 66.4 equivalent/106 gram and an intrinsic viscosity of 1.35 dl/g was subjected to a phenolic treatment process as described below.
- the fiber was first immersed in an aqueous bath consisting of 0.5% ethylene diamine and 2.0% formaldehyde at 54°C (130°F) for 30 minutes. After a rinse, the fiber is then subjected to a second aqueous solution of 1.5% resorcinol and 1% formaldehyde at 54°C (130°F) for one hour. Followinged by a rinse cycle, the sample was subsequently air dried and heated 10 minutes at 149°C (300°F).
- Table 1 compares intrinsic viscosities and tensile properties of fiber processed with the above formulation and untreated PA 6,6 fibers having high and low amine end group concentrations.
- Table 2 includes data describing the properties after exposure to sodium hypochlorite solution in a standard degradation test.
- Table 3 shows that the treated high amine end group fibers give superior properties in terms of improved ranking on the simulated papermaking press. According to the table, the lower the ranking the better the results.
- the trial fabric structure utilized was composed of 100% of the modified polyamide fiber, with the addition of the special process steps of the invention.
- Our trial ran 12 days and was scheduled off.
- the fabric showed no signs of instability and our analysis of the used fabric revealed low weight loss, no fiber fibrillation and fatigue, and little loss to bulk and water handling capacity.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Paper (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Polarising Elements (AREA)
- Polyamides (AREA)
- Artificial Filaments (AREA)
- Nonwoven Fabrics (AREA)
- Woven Fabrics (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Reinforced Plastic Materials (AREA)
- Heat Sensitive Colour Forming Recording (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Filtering Materials (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Printing Plates And Materials Therefor (AREA)
- Treatment Of Fiber Materials (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US33762789A | 1989-04-13 | 1989-04-13 | |
US337627 | 1989-04-13 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0392682A2 EP0392682A2 (en) | 1990-10-17 |
EP0392682A3 EP0392682A3 (en) | 1991-03-13 |
EP0392682B1 true EP0392682B1 (en) | 1995-08-16 |
Family
ID=23321309
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90303023A Expired - Lifetime EP0392682B1 (en) | 1989-04-13 | 1990-03-21 | Paper machine pressing fabrics |
Country Status (13)
Country | Link |
---|---|
EP (1) | EP0392682B1 (sv) |
JP (1) | JPH072839B2 (sv) |
KR (1) | KR950013485B1 (sv) |
AT (1) | ATE126526T1 (sv) |
AU (1) | AU626659B2 (sv) |
CA (1) | CA2013852C (sv) |
DE (1) | DE69021612T2 (sv) |
DK (1) | DK0392682T3 (sv) |
ES (1) | ES2078304T3 (sv) |
FI (1) | FI101154B (sv) |
GR (1) | GR3017488T3 (sv) |
NO (1) | NO179711C (sv) |
ZA (1) | ZA902210B (sv) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2264561T3 (es) * | 1991-02-18 | 2007-01-01 | Albany International Corp. | Mejoras en y relacionadas con telas para maquinas de fabricacion de papel. |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2388676A (en) * | 1942-01-12 | 1945-11-13 | Du Pont | Synthetic linear polyamides |
US3032441A (en) * | 1960-04-18 | 1962-05-01 | Huyck Corp | Open weave endless fabric and method for producing the same |
EP0159635A2 (en) * | 1984-04-12 | 1985-10-30 | E.I. Du Pont De Nemours And Company | Process for improving the dyeability of nylon carpet fiber |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE456355A (sv) * | 1939-10-07 | |||
GB616549A (en) * | 1946-04-26 | 1949-01-24 | Dunlop Rubber Co | Improvements in and relating to the treatment of nylon thread |
DE1469347C3 (de) * | 1964-05-25 | 1974-01-24 | Filzfabrik Fulda Gmbh & Co, 6400 Fulda | Verfahren zur Herstellung von Schleifartikeln |
-
1990
- 1990-03-20 NO NO901281A patent/NO179711C/no unknown
- 1990-03-21 DE DE69021612T patent/DE69021612T2/de not_active Expired - Fee Related
- 1990-03-21 ES ES90303023T patent/ES2078304T3/es not_active Expired - Lifetime
- 1990-03-21 EP EP90303023A patent/EP0392682B1/en not_active Expired - Lifetime
- 1990-03-21 DK DK90303023.7T patent/DK0392682T3/da active
- 1990-03-21 AT AT90303023T patent/ATE126526T1/de not_active IP Right Cessation
- 1990-03-22 ZA ZA902210A patent/ZA902210B/xx unknown
- 1990-03-23 FI FI901474A patent/FI101154B/sv not_active IP Right Cessation
- 1990-04-04 CA CA002013852A patent/CA2013852C/en not_active Expired - Fee Related
- 1990-04-12 AU AU53266/90A patent/AU626659B2/en not_active Ceased
- 1990-04-12 JP JP2095205A patent/JPH072839B2/ja not_active Expired - Lifetime
- 1990-04-13 KR KR1019900005131A patent/KR950013485B1/ko not_active IP Right Cessation
-
1995
- 1995-09-21 GR GR950402605T patent/GR3017488T3/el unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2388676A (en) * | 1942-01-12 | 1945-11-13 | Du Pont | Synthetic linear polyamides |
US3032441A (en) * | 1960-04-18 | 1962-05-01 | Huyck Corp | Open weave endless fabric and method for producing the same |
EP0159635A2 (en) * | 1984-04-12 | 1985-10-30 | E.I. Du Pont De Nemours And Company | Process for improving the dyeability of nylon carpet fiber |
Also Published As
Publication number | Publication date |
---|---|
ES2078304T3 (es) | 1995-12-16 |
ZA902210B (en) | 1990-12-28 |
NO901281D0 (no) | 1990-03-20 |
EP0392682A2 (en) | 1990-10-17 |
KR900016515A (ko) | 1990-11-13 |
JPH032218A (ja) | 1991-01-08 |
FI901474A0 (fi) | 1990-03-23 |
AU626659B2 (en) | 1992-08-06 |
GR3017488T3 (en) | 1995-12-31 |
CA2013852A1 (en) | 1990-10-13 |
DE69021612T2 (de) | 1996-02-08 |
AU5326690A (en) | 1990-10-18 |
DK0392682T3 (da) | 1995-12-11 |
NO179711B (no) | 1996-08-26 |
NO179711C (no) | 1996-12-04 |
NO901281L (no) | 1990-10-15 |
KR950013485B1 (ko) | 1995-11-08 |
CA2013852C (en) | 2001-01-02 |
ATE126526T1 (de) | 1995-09-15 |
EP0392682A3 (en) | 1991-03-13 |
JPH072839B2 (ja) | 1995-01-18 |
DE69021612D1 (de) | 1995-09-21 |
FI101154B (sv) | 1998-04-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4874660A (en) | Paper machine felts | |
US3573089A (en) | Method of manufacturing screen cloths for papermaking | |
EP0575476A1 (en) | Surface treated aramid fibers and a process for making them | |
CA1257125A (en) | Papermachine clothing | |
US3313645A (en) | Papermaker's fabric with adhesive resin encased yarns | |
EP0525152B1 (en) | Improvements in and relating to paper machine clothing | |
JP2507212B2 (ja) | 抄紙機用フェルト | |
FI92943B (sv) | Filtar för pappersmaskin | |
EP0392682B1 (en) | Paper machine pressing fabrics | |
US5783501A (en) | Paper machine felts | |
EP0367740B1 (en) | Paper machine fabrics having controlled release | |
JPS63120172A (ja) | 織物の処理方法 | |
JP3440442B2 (ja) | 抄紙用フェルト及びその製造方法 | |
KR0123010B1 (ko) | 고온 가압에 응용되는 신규 직물 | |
US5660889A (en) | Coating polyamide or polyester porous self-supporting sheet | |
CA2228774A1 (en) | Papermaking felts and fibers having improved antiredeposition properties | |
CN1142552A (zh) | 纸机压榨织物 | |
JPH0444033B2 (sv) | ||
FI81152C (sv) | Förfarande för förbättring av effektiviteten vid kemisk behandling av pappersmaskinbeklädnader |
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 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE |
|
17P | Request for examination filed |
Effective date: 19910911 |
|
RAP3 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: ALBANY INTERNATIONAL CORP. |
|
17Q | First examination report despatched |
Effective date: 19930525 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE |
|
REF | Corresponds to: |
Ref document number: 126526 Country of ref document: AT Date of ref document: 19950915 Kind code of ref document: T |
|
REF | Corresponds to: |
Ref document number: 69021612 Country of ref document: DE Date of ref document: 19950921 |
|
ITF | It: translation for a ep patent filed | ||
REG | Reference to a national code |
Ref country code: GR Ref legal event code: FG4A Free format text: 3017488 |
|
ET | Fr: translation filed | ||
REG | Reference to a national code |
Ref country code: DK Ref legal event code: T3 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2078304 Country of ref document: ES Kind code of ref document: T3 |
|
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: DE Payment date: 19991231 Year of fee payment: 11 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 20000307 Year of fee payment: 11 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20000310 Year of fee payment: 11 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DK Payment date: 20000313 Year of fee payment: 11 Ref country code: AT Payment date: 20000313 Year of fee payment: 11 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20000315 Year of fee payment: 11 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 20000322 Year of fee payment: 11 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: LU Payment date: 20000323 Year of fee payment: 11 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: CH Payment date: 20000328 Year of fee payment: 11 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 20000330 Year of fee payment: 11 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GR Payment date: 20000331 Year of fee payment: 11 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: BE Payment date: 20000518 Year of fee payment: 11 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010321 Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010321 Ref country code: DK Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010321 Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010321 |
|
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 NON-PAYMENT OF DUE FEES Effective date: 20010322 Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010322 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010331 Ref country code: GR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010331 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010331 Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010331 |
|
BERE | Be: lapsed |
Owner name: ALBANY INTERNATIONAL CORP. Effective date: 20010331 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20011001 |
|
EUG | Se: european patent has lapsed |
Ref document number: 90303023.7 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20010321 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
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: 20011130 |
|
NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee |
Effective date: 20011001 |
|
REG | Reference to a national code |
Ref country code: DK Ref legal event code: EBP |
|
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: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20020101 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20030303 |
|
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;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20050321 |