EP0685008B1 - Papiermaschinenfilz - Google Patents
Papiermaschinenfilz Download PDFInfo
- Publication number
- EP0685008B1 EP0685008B1 EP94929527A EP94929527A EP0685008B1 EP 0685008 B1 EP0685008 B1 EP 0685008B1 EP 94929527 A EP94929527 A EP 94929527A EP 94929527 A EP94929527 A EP 94929527A EP 0685008 B1 EP0685008 B1 EP 0685008B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- polyamide
- paper machine
- felt
- machine felt
- postcondensed
- 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
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Classifications
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4326—Condensation or reaction polymers
- D04H1/4334—Polyamides
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
- D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
- D04H1/498—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres entanglement of layered webs
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
- D04H1/60—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in dry state, e.g. thermo-activatable agents in solid or molten state, and heat being applied subsequently
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
- D04H1/64—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions
- D04H1/645—Impregnation followed by a solidification process
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H13/00—Other non-woven fabrics
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F7/00—Other details of machines for making continuous webs of paper
- D21F7/08—Felts
- D21F7/083—Multi-layer felts
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S162/00—Paper making and fiber liberation
- Y10S162/90—Papermaking press felts
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S162/00—Paper making and fiber liberation
- Y10S162/902—Woven fabric for papermaking drier section
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/10—Scrim [e.g., open net or mesh, gauze, loose or open weave or knit, etc.]
- Y10T442/184—Nonwoven scrim
- Y10T442/197—Including a nonwoven fabric which is not a scrim
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/10—Scrim [e.g., open net or mesh, gauze, loose or open weave or knit, etc.]
- Y10T442/184—Nonwoven scrim
- Y10T442/198—Coated or impregnated
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/30—Woven fabric [i.e., woven strand or strip material]
- Y10T442/3065—Including strand which is of specific structural definition
- Y10T442/3089—Cross-sectional configuration of strand material is specified
- Y10T442/3098—Cross-sectional configuration varies longitudinaly along the strand
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/30—Woven fabric [i.e., woven strand or strip material]
- Y10T442/3146—Strand material is composed of two or more polymeric materials in physically distinct relationship [e.g., sheath-core, side-by-side, islands-in-sea, fibrils-in-matrix, etc.] or composed of physical blend of chemically different polymeric materials or a physical blend of a polymeric material and a filler material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/30—Woven fabric [i.e., woven strand or strip material]
- Y10T442/3146—Strand material is composed of two or more polymeric materials in physically distinct relationship [e.g., sheath-core, side-by-side, islands-in-sea, fibrils-in-matrix, etc.] or composed of physical blend of chemically different polymeric materials or a physical blend of a polymeric material and a filler material
- Y10T442/3154—Sheath-core multicomponent strand material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/30—Woven fabric [i.e., woven strand or strip material]
- Y10T442/3146—Strand material is composed of two or more polymeric materials in physically distinct relationship [e.g., sheath-core, side-by-side, islands-in-sea, fibrils-in-matrix, etc.] or composed of physical blend of chemically different polymeric materials or a physical blend of a polymeric material and a filler material
- Y10T442/3163—Islands-in-sea multicomponent strand material
Definitions
- the invention particularly relates to a post-condensed paper machine felt made of a polyamide base fabric and a needled polyamide cover layer.
- the invention further relates to a method for increasing the molecular weight the aforementioned paper machine felts.
- Paper machine felts usually consist of a base fabric to which a pre-needled nonwoven is needled. In principle, it is also here possible to use spunbonded webs instead of dry-laid nonwovens.
- DE-A-40 27 063 describes a process for the production of special high molecular polyamide fibers described by post-condensation.
- the disadvantage of these post-condensed fibers is that they process poorly because they are very stiff due to their high molecular weights.
- Post-condensed fibers also have practically no thermal shrinkage more.
- the felts can change during the fixing process, which is also important for the Basic tissue is necessary, no longer pre-compress. This can cause that fiber anchoring is not optimal.
- an inventive one post-condensed paper machine felt the required good resistance against chemicals and abrasion if it has a solution viscosity of at least 5, measured at 20 ° C (according to DIN 53 727) in Has sulfuric acid.
- the polyamide threads of the post-condensed according to the inventive method Paper machine felts consist in particular of aliphatic or partially aromatic polyamide or copolyamide, the aliphatic based on ⁇ -aminocarboxylic acids, Lactams or aliphatic diamines and aliphatic Dicarboxylic acids with 4 to 12 carbon atoms, and the partially aromatic aliphatic monomers based on 4 to 12 carbon atoms.
- polyamide 4 polyamide 6, polyamide 11, polyamide 12, polyamide 46, polyamide 66, polyamide 610, polyamide 612, polyamide 1212, polyamide 10T and Polyamide 1 2T preferred.
- Inorganic phosphorus compounds preferably salts or esters of phosphorous acid or orthophosphoric acid or the acids themselves, are used as post-condensation catalysts, H 3 PO 4 , H 3 PO 3 , Na 2 HPO 4 .12 H 2 O, Na 2 HPO 3. 5H 2 O and NaH 2 PO 4 are particularly preferred.
- the textile fabrics are impregnated, the catalyst content of the preferably aqueous solution being at most 0.5% by weight, preferably 0.1 to 0.3% by weight, particularly preferably 0.2% by weight, based on the amount of textile to be condensed , is.
- the post-condensation is carried out at temperatures from 160 to 200 ° C., preferably at 170 to 190 ° C., in an inert gas atmosphere or in vacuo for 5 to 48 hours, preferably 6 to 24 hours, particularly preferably 8 to 12 hours.
- the textile fabric is treated with aqueous solutions of H 3 PO 4 or H 3 PO 3 in quantities of 0.2% by weight, based on the quantity of textile to be condensed, at 180 ° C. in vacuo for 8 hours post-condensed.
- the paper machine felt according to the invention made of polyamide threads has 20 ° C a relative solution viscosity, measured as a 1% solution in 98% sulfuric acid (DIN 53 727), of at least 5, preferably at least 6, particularly preferably at least 6.5, very particularly preferably at least 7.
- the polyamide threads are in particular those made from ⁇ -aminocarboxylic acids or lactams with 4 to 12 carbon atoms or from aliphatic Diamines and aliphatic dicarboxylic acids with 4 to 12 carbon atoms.
- polyamide 4 polyamide 6, polyamide 11, polyamide 12, Polyamide 46, polyamide 66, polyamide 610, polyamide 612 and polyamide 1212 prefers.
- Another embodiment comprises partially aromatic polyamides or copolyamides from aliphatic monomers with 4 to 12 carbon atoms and aromatic monomers with 6 to 12 carbon atoms, in particular Polyamide 10T and polyamide 12T.
- a particular advantage of the invention is that it is made of easy to process first low-viscosity polyamide threads without fiber damage in a known per se Way a textile structure can be produced, its molecular weight then according to the invention by post-condensation to a relative Solution viscosity in sulfuric acid is increased by at least 7, whereby at the same time increases the crystallinity and fixes the shape of the textile fabric becomes.
- the felt was then dried at 60 ° C. for 18 hours.
- the post-condensation was carried out in a vacuum oven at 180 ° C. for 16 Hours.
- the analysis data of this sample (sample 2) are in the Tables 1 and 2 listed.
- Sample 3 consists of a felt made of TM262R.
- Sample 4 consists of a felt made of TM262R, the fibers being post-condensed (30 minutes, 98 ° C; 16 hours, 180 ° C, vacuum) relative viscosity of the fibers 7.8.
- the felt was in a dyeing autoclave at 98 ° C for 30 minutes with 0.24% impregnated acid solution. After that it is at 60 ° C for 18 Hours.
- the post-condensation was carried out in a vacuum oven performed at 180 ° C for 16 hours (see Example 2).
- the felts were tested on the FTP-EMS felt test press.
- a test felt of 2 x 0.2 m is clamped in two collets.
- the collets are connected to each other by a rope under the machine connected and pulled back and forth during the test.
- the test consists of the partial steps, pressure test, pressure test with high pressure shower and abrasion test.
- the felt is pushed back and forth using a pair of pressure rollers moved here (Fig. 2a).
- the line pressure of the pair of printing rollers can be set between 0 and 300 kN / m.
- a "ceramic strip imitation roller” is used (Fig. 3). There are gaps in the transverse direction on this roller milled out so that the remaining webs take the form of squeegees to have.
- the felt pattern is pulled under the high-speed cable Abrasive roller pulled back and forth. The behavior of the felts against Abrasion becomes microscopic and by measuring the amount of fiber rubbed off judged.
- Treatments A to F are carried out in succession on a test specimen. Then felt thickness, air permeability and fiber loss measured in comparison to the untreated sample.
- Table 1 shows the results of the samples processed with the felt test press to find.
- the thickness of the post-condensed felt (sample 2) changes at least as a result of the test run. Sample 2 has the greatest thickness after the test.
- the air permeability of the standard felts (samples 3 and 4) is higher compared to the post-condensed felt (sample 2) both in the unfixed and in the fixed state.
- sample 2 The change in air permeability due to the treatment on the felt test press is lowest in the post-condensed felt (sample 2), i.e. Sample 2 has the most uniform properties over the entire test cycle.
- the fiber loss of the comparative felts is significantly higher than that of the post-condensed felt (sample 2, 21 g / m 2 ).
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Dispersion Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Paper (AREA)
Description
Probe | Fasern | Monofil grau | Monofil weiß | |
3 | Standardfilz | ηrel = 3,3 | 3,4 | 3,4 |
2 | Nachkondensationsfilz | ηrel = 6,6 | 7,3 | 8,11 |
4 | Standardfilz aus nachkondensierten Fasern | ηrel = 7,8 | 3,4 | 3,4 |
Claims (12)
- Nachkondensierter Papiermaschinenfilz aus einem Polyamid-Grundgewebe sowie einer aufgenadelten Polyamid-Deckschicht, dadurch gekennzeichnet, daß der Papiermaschinenfilz eine relative Lösungsviskosität in Schwefelsäure nach DIN 53 727 von mindestens 5 besitzt.
- Papiermaschinenfilz nach Anspruch 1, der eine relative Lösungsviskosität in Schwefelsäure von mindestens 6, bevorzugt mindestens 6,5, besonders bevorzugt von mindestens 7, besitzt.
- Papiermaschinenfilz nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Polyamid ein aliphatisches Polyamid oder Copolyamid aus w-Aminocarbonsäuren oder Lactamen mit 4 bis 12 Kohlenstoffatomen, bevorzugt Polyamid 4, Polyamid 6, Polyamid 11 oder Polyamid 12, ist.
- Papiermaschinenfilz nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Polyamid ein aliphatisches Polyamid oder Copolyamid aus aliphatischen Diaminen und aliphatischen Dicarbonsäuren mit 4 bis 12 Kohlenstoffatomen, bevorzugt Polyamid 46, Polyamid 66, Polyamid 610, Polyamid 612 oder Polyamid 1212, ist.
- Papiermaschinenfilz nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Polyamid ein teilaromatisches Poiyamid oder Copolyamid aus aliphatischen Monomeren mit 4 bis 12 Kohlenstoffatomen und aromatischen Monomeren mit 6 bis 12 Kohlenstoffatomen, bevorzugt Polyamid 1 OT oder Polyamid 12T, ist.
- Verfahren zur Erhöhung des Molekulargewichts von Papiermaschinenfilzen gemäß einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß man den Papiermaschinenfilz mit einer Lösung von Nachkondensationskatalysatoren imprägniert, anschließend trocknet und nachfolgend unter Sauerstoffausschluß unterhalb des Schmelzpunktes des Polyamids in fester Phase thermisch nachkondensiert.
- Verfahren nach Anspruch 6, dadurch gekennzeichnet, daß man als Nachkondensationskatalysatoren anorganische Phosphorverbindungen, bevorzugt phosphorige Säure, Orthophosphorsäure, deren Salze oder Ester, besonders bevorzugt H3PO4, H3PO3, Na2HPO4 · 12H2O, Na2HPO3 · 5H2O oder NaH2PO4, einsetzt.
- Verfahren nach Anspruch 7, dadurch gekennzeichnet, daß man die Nachkondensationskatalysatoren als wäßrige Lösungen auf den Papiermaschinenfilz appliziert.
- Verfahren nach Anspruch 7, dadurch gekennzeichnet, daß man eine Katalysatormenge von maximal 0,5 Gew.-%, bevorzugt 0,1 bis 0,3 Gew.-%, besonders bevorzugt 0,2 Gew.-%, bezogen auf die nachzukondensierende Papiermaschinenfilzmenge einsetzt.
- Verfahren nach einem der vorhergehenden Ansprüche 6 bis 9, dadurch gekennzeichnet, daß man die Nachkondensation bei Temperaturen von 1 60 bis 200 °C, bevorzugt bei 170 bis 190 °C, in Inertgasatmosphäre oder Vakuum durchführt.
- Verfahren nach einem der vorhergehenden Ansprüche 6 bis 10, dadurch gekennzeichnet, daß man die Nachkondensation über einen Zeitraum von 5 bis 48 Stunden, bevorzugt 6 bis 24 Stunden, besonders bevorzugt 8 bis 12 Stunden, durchführt.
- Verfahren nach einem der vorhergehenden Ansprüche 6 bis 11, dadurch gekennzeichnet, daß man den Papiermaschinenfilz mit wäßrigen Lösungen von H3PO4 oder H3PO3, 0,2 Gew.-%, bezogen auf die nachzukondensierende Papiermaschinenfilzmenge, bei 180 °C im Vakuum 8 Stunden lang nachkondensiert.
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4343067 | 1993-12-16 | ||
DE4343067 | 1993-12-16 | ||
DE4434898A DE4434898C2 (de) | 1993-12-16 | 1994-09-29 | Nachkondensierter Papiermaschinenfilz aus Polyamid-Grundgewebe sowie Verfahren zu seiner Herstellung |
DE4434898 | 1994-09-29 | ||
PCT/EP1994/003337 WO1995016810A1 (de) | 1993-12-16 | 1994-10-10 | Papiermaschinenfilz |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0685008A1 EP0685008A1 (de) | 1995-12-06 |
EP0685008B1 true EP0685008B1 (de) | 1998-05-20 |
Family
ID=25932161
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94929527A Expired - Lifetime EP0685008B1 (de) | 1993-12-16 | 1994-10-10 | Papiermaschinenfilz |
Country Status (7)
Country | Link |
---|---|
US (1) | US5783501A (de) |
EP (1) | EP0685008B1 (de) |
JP (1) | JPH08506863A (de) |
AT (1) | ATE166400T1 (de) |
CA (1) | CA2156294C (de) |
FI (1) | FI105836B (de) |
WO (1) | WO1995016810A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2188421A1 (de) | 2007-10-17 | 2010-05-26 | Invista Technologies S.A R.L. | Herstellung von polyamid-filamenten mit sehr hohem molekulargewicht |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19930464C1 (de) * | 1999-07-01 | 2000-10-19 | Heimbach Gmbh Thomas Josef | Papiermaschinenfilz |
DE10144307A1 (de) * | 2001-09-10 | 2003-03-27 | Bayer Faser Gmbh | Trägergewebe für Papiermaschinenbespannungen |
US7514030B2 (en) * | 2002-12-30 | 2009-04-07 | Albany International Corp. | Fabric characteristics by flat calendering |
JP4454408B2 (ja) * | 2004-06-25 | 2010-04-21 | イチカワ株式会社 | 抄紙用フェルト |
DE102005030774A1 (de) * | 2005-07-01 | 2007-01-11 | Voith Patent Gmbh | Papiermaschinenbespannung |
DE102007028365A1 (de) | 2007-06-15 | 2008-12-18 | Voith Patent Gmbh | Pressfilz |
DE102007055902A1 (de) * | 2007-12-21 | 2009-06-25 | Voith Patent Gmbh | Band für eine Maschine zur Herstellung von Bahnmaterial |
DE102007055801A1 (de) * | 2007-12-21 | 2009-06-25 | Voith Patent Gmbh | Band für eine Maschine zur Herstellung von Bahnmaterial und Verfahren zur Herstellung eines derartigen Bands |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8709067D0 (en) * | 1987-04-15 | 1987-05-20 | Albany Int Corp | Monofilaments |
DE4027063C2 (de) * | 1990-08-27 | 1994-02-03 | Inventa Ag | Verfahren zur Herstellung von besonders hochmolekularen Polyamidfasern sowie nach diesem Verfahren herstellbare Polyamidfasern |
DE4226592A1 (de) * | 1991-08-23 | 1993-03-04 | Inventa Ag | Papiermaschinenfilze und verfahren zur herstellung derselben |
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1994
- 1994-10-10 US US08/505,206 patent/US5783501A/en not_active Expired - Fee Related
- 1994-10-10 EP EP94929527A patent/EP0685008B1/de not_active Expired - Lifetime
- 1994-10-10 CA CA 2156294 patent/CA2156294C/en not_active Expired - Fee Related
- 1994-10-10 JP JP51648094A patent/JPH08506863A/ja active Pending
- 1994-10-10 WO PCT/EP1994/003337 patent/WO1995016810A1/de active IP Right Grant
- 1994-10-10 AT AT94929527T patent/ATE166400T1/de not_active IP Right Cessation
-
1995
- 1995-08-16 FI FI953875A patent/FI105836B/fi active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2188421A1 (de) | 2007-10-17 | 2010-05-26 | Invista Technologies S.A R.L. | Herstellung von polyamid-filamenten mit sehr hohem molekulargewicht |
Also Published As
Publication number | Publication date |
---|---|
JPH08506863A (ja) | 1996-07-23 |
WO1995016810A1 (de) | 1995-06-22 |
ATE166400T1 (de) | 1998-06-15 |
US5783501A (en) | 1998-07-21 |
FI105836B (fi) | 2000-10-13 |
FI953875A0 (fi) | 1995-08-16 |
EP0685008A1 (de) | 1995-12-06 |
FI953875A (fi) | 1995-08-16 |
CA2156294C (en) | 2001-07-10 |
CA2156294A1 (en) | 1995-06-22 |
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