DE102011011126A1 - Core-sheath fiber, useful in conveyor belts, filter cloths or in paper machines, preferably in forming wire press fabrics and dryer fabrics comprises core comprising polymer, and sheath comprising polymer of core - Google Patents
Core-sheath fiber, useful in conveyor belts, filter cloths or in paper machines, preferably in forming wire press fabrics and dryer fabrics comprises core comprising polymer, and sheath comprising polymer of core Download PDFInfo
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- DE102011011126A1 DE102011011126A1 DE201110011126 DE102011011126A DE102011011126A1 DE 102011011126 A1 DE102011011126 A1 DE 102011011126A1 DE 201110011126 DE201110011126 DE 201110011126 DE 102011011126 A DE102011011126 A DE 102011011126A DE 102011011126 A1 DE102011011126 A1 DE 102011011126A1
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Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/0027—Screen-cloths
-
- 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
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
-
- 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
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/06—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyolefin as constituent
-
- 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
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/10—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one other macromolecular compound obtained by reactions only involving carbon-to-carbon unsaturated bonds as constituent
-
- 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
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/12—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyamide as constituent
-
- 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
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/14—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyester as constituent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/02—Types of fibres, filaments or particles, self-supporting or supported materials
- B01D2239/0216—Bicomponent or multicomponent fibres
- B01D2239/0233—Island-in-sea
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
- B01D2239/0604—Arrangement of the fibres in the filtering material
- B01D2239/0613—Woven
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Textile Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Paper (AREA)
- Woven Fabrics (AREA)
Abstract
Description
Technisches GebietTechnical area
Die Erfindung betrifft Transportbänder mit einer magnetischen Markiereinrichtung. Mittels eines externen, auf Magnetfelder reagierenden Sensors wird der Vorbeilauf der markierten Stelle registriert.The invention relates to conveyor belts with a magnetic marking device. By means of an external sensor responding to magnetic fields, the passage of the marked point is registered.
Beschreibungdescription
Die Zugabe feiner, magnetischer Partikel in Polymere ist Stand der Technik. Hierzu wird z. B. ein fein gemahlenes Pulver eines magnetisierbaren Metalls möglichst homogen in die Polymermatrix eingearbeitet. Eine der bevorzugten Anwendungen ist die Zugabe der magnetisierbaren Partikel in schmelzspinnbare Polymere, wie z. B. Polyester, Polyamide, Polyolefine und ähnliche, die anschließend zu Fäden versponnen werden. Dabei kann es sich sowohl um Fasern handeln, die wiederum sekundär zu Fäden versponnen werden, als auch um endlose Multifilament- oder Monofilamentgarne.The addition of fine, magnetic particles in polymers is state of the art. For this purpose, z. B. a finely ground powder of a magnetizable metal incorporated as homogeneously as possible in the polymer matrix. One of the preferred applications is the addition of the magnetizable particles in melt-spinnable polymers, such as. As polyesters, polyamides, polyolefins and the like, which are then spun into threads. These can be both fibers, which in turn are spun secondarily to threads, as well as endless multifilament or monofilament yarns.
In der Literatur werden zahlreiche Anwendungsmöglichkeiten genannt, z. B. in der
Transportbänder in modernen Anlagen unterliegen oft einem hohen Verschleiß: Zwischen den angetriebenen Umlenkrollen und dem Transportband entsteht ein durch die Belastung erzeugter Schlupf. Trotz automatischer Nachspannvorrichtungen ist die Umlaufgeschwindigkeit des Transportbandes geringer als die der Antriebswalzen. Wegen der Reibung verschleißt das Transportbandgewebe zusehends und die Standzeit wird verringert.Conveyor belts in modern systems are often subject to high wear: between the driven pulleys and the conveyor belt created by the load slip. Despite automatic Nachspannvorrichtungen the rotational speed of the conveyor belt is lower than that of the drive rollers. Because of the friction, the conveyor belt fabric wears rapidly and the service life is reduced.
Es ist deshalb vorteilhaft, wenn die tatsächliche Umlaufgeschwindigkeit des Transportbands überwacht werden kann, z. B. durch elektromagnetische Sensoren. Dazu sind magnetische Markierungen im Transportband erforderlich. Die
Wegen der erforderlichen Steifheit, Festigkeit und Struktur werden in speziellen technischen Geweben bevorzugt Monofilamente verwendet. Bei den in
Aufgabe der vorliegenden Erfindung ist es, magnetische Markierdrähte in Transportgeweben einzusetzen, die eine Ausdehnung von weniger als 1 mm in Transportrichtung haben und damit eine wesentlich genauere Bestimmung des Schlupfs zwischen Transportgewebe und Antriebswalzen erlauben. Weiter sollen die magnetisierbaren Monofilamente vor vorzeitigem Verschleiß durch Abrieb geschützt werden.Object of the present invention is to use magnetic marking wires in transport fabrics, which have an extension of less than 1 mm in the transport direction and thus allow a much more accurate determination of the slip between transport fabric and drive rollers. Furthermore, the magnetizable monofilaments should be protected against premature wear by abrasion.
Gelöst wird die Aufgabe dadurch, dass die Ferrite in den Kern des Querschnitts eines Monofilaments eingebracht werden und außen einen ringförmigen Schutzmantel erhalten, der aus dem gleichen Polymer wie das des Kerns besteht. Dadurch werden Haftungsprobleme zwischen Kern und Mantel vermieden. Der Mantel bietet einen Schutz gegen vorzeitigen Abrieb.The object is achieved by the fact that the ferrites are introduced into the core of the cross section of a monofilament and externally obtained an annular protective jacket, which consists of the same polymer as that of the core. This avoids adhesion problems between core and jacket. The jacket provides protection against premature abrasion.
Ein Transportband ist ein technisches Gewebe, in dem als Kettfäden i. d. R. hochfeste Multifilamente verwendet werden, die eine leichte Umlenkung um die Führungsrollen erlauben, während als Schussfaden bevorzugt Monofilamente eingesetzt werden, die zur nötigen Quersteifigkeit beitragen. Ggfs. kann das Transportbandgewebe mit einer Gummi- oder PVC-Beschichtung versehen werden. Wird pro Transportband ein einzelner oder mehrere, eng beieinander liegende erfindungsgemäße Schussfäden verwendet, kann dieser Bereich im umlaufenden Transportband von einem elektromagnetischen Detektor registriert und über die Bandlänge und Zeitdifferenz der Signale in eine Umlaufgeschwindigkeit umgerechnet werden. Die Geschwindigkeitsdifferenz zwischen Antriebsgeschwindigkeit und effektiver Bandgeschwindigkeit ist der Schlupf. Wird er zu groß, geht ein Teil der Antriebsleistung in Wärme verloren und je nach Anwendung können damit Qualitätsprobleme auftreten.A conveyor belt is a technical fabric in which high-strength multifilaments are usually used as warp threads, which allow a slight deflection around the guide rollers, while monofilaments are preferably used as the weft thread, which contribute to the necessary transverse rigidity. If necessary. The conveyor belt fabric can be provided with a rubber or PVC coating. If a single or a plurality of closely spaced weft threads according to the invention is used per conveyor belt, this area can be registered in the circulating conveyor belt by an electromagnetic detector and converted into a rotational speed over the tape length and time difference of the signals. The speed difference between drive speed and effective belt speed is slip. Will he be too big Part of the drive power is lost in heat and depending on the application quality problems can occur.
Beispiele:Examples:
Ein fein gemahlenes Pulver aus Magnetit (Fe3O4 = Eisen(II, III)-oxid), Partikelgröße < 3 μm, wurde zu 20 Gew-% einem Polyethylenterephthalat (PET) zudosiert und in unserem Auftrag von Fa. Clariant Masterbatches (Deutschland) GmbH, 56112 Lahnstein, compoundiert.A finely ground powder of magnetite (Fe 3 O 4 = iron (II, III) oxide), particle size <3 microns, was added to a 20 wt% polyethylene terephthalate (PET) and on our behalf by Fa. Clariant Masterbatches (Germany ) GmbH, 56112 Lahnstein, compounded.
Dieses Masterbatch wurde in einer Versuchsreihe gravimetrisch mit 2,5 Gew-% bis 30 Gew-% dem PET-Schnitzelstrom unmittelbar vor der Extrusion zudosiert. Dies ergab in der Schmelze einen Magnetit-Gehalt von 0,5 Gew-% bis 6,0 Gew-%. Diese Schmelze wurde über eine Zahnradpumpe einem Bikomponenten-Spinnpack als Kernmonofilament vorgelegt, während ein zweiter Extruder unmodifiziertes PET über eine zweite Spinnpumpe als Mantelkomponente zudosierte. Anschließend wurden die Monofilamente in einen Spinntank gesponnen und abgekühlt, unter Wärmeeinwirkung mehrfach verstreckt und aufgespult.In a series of experiments, this masterbatch was added gravimetrically at 2.5% by weight to 30% by weight to the PET chip stream immediately before the extrusion. This gave a magnetite content of 0.5% by weight to 6.0% by weight in the melt. This melt was submitted via a gear pump a bicomponent spin pack as a core monofilament, while a second extruder dosed unmodified PET via a second spin pump as a shell component. Subsequently, the monofilaments were spun into a spinning tank and cooled, stretched several times under heat and spooled.
Die Technik der gleichzeitigen Kern-Mantel-Spinnens ist ausführlich in der
Als Muster wurden Drähte im Durchmesser 0,30 mm in „schrumpfarmer” Technologie hergestellt. „Schrumpfarm” bedeutet Muster 30 min im Normklima (23°C, 65% r. F.) zu lagern. Anschließend werden Stränge von einem Meter Länge geschnitten und in Ringen von ca. 10–15 cm Durchmesser gebunden. Diese Ringe werden in einem Heißluftofen bei 180°C 30 min aufgehängt und können „frei” schrumpfen, d. h. ohne Vorspannung. Anschließend kühlen die Ringe wieder für 30 min im Normklima ab, danach wird die Restlänge bestimmt und der Schrumpf in % ermittelt.As a pattern, wires were made in the diameter of 0.30 mm in "low-shrinkage" technology. "Low shrinkage" means to store samples for 30 minutes in standard climate (23 ° C, 65% rh). Then strands of one meter in length are cut and tied in rings of about 10-15 cm in diameter. These rings are suspended in a hot air oven at 180 ° C for 30 minutes and can "free" shrink, d. H. without preload. The rings then cool again for 30 minutes under standard conditions, after which the remaining length is determined and the shrinkage is determined in%.
Der Mantel dient als Schutzfunktion, damit keine Magnetit-Teilchen aus der Oberfläche herausragen und für erhöhten Abrieb sorgen. Der Mantel hat einen Anteil von 30 Gew-%. Das entspricht beim Monofilamentdurchmesser von 0,30 mm einer Schutzmantelstärke von 25 μm.The jacket serves as a protective function, so that no magnetite particles protrude from the surface and ensure increased abrasion. The coat has a share of 30% by weight. This corresponds to the monofilament diameter of 0.30 mm a protective sheath thickness of 25 microns.
In einer weiteren Versuchreihe wurden Masterbatches mit 30 Gew-% Magnetitgehalt eingesetzt und in gleicher Dosage wie oben zudosiert, also mit 0,75 Gew-% bis 9,0 Gew-% und ebenfalls zu Kern-Mantel-Monofilamenten mit 30% Mantelanteil versponnen.In a further series of experiments, masterbatches containing 30% by weight of magnetite were used and metered in the same dosage as above, ie with 0.75% by weight to 9.0% by weight and likewise spun into core-shell monofilaments with 30% shell content.
Die Messwerte der Beispiele sind in der Tabelle zusammen gefasst.The measured values of the examples are summarized in the table.
Erwartungsgemäß fällt die Festigkeit mit zunehmendem Magnetit-Gehalt ab. Insbesondere für Kettfäden sind die magnetisierbaren Monofilamente deshalb weniger geeignet, da sie der Festigkeitsträger in Geweben sind. Gut geeignet sind sie dagegen als Schussfäden, da hier keine so hohen Anforderungen an die Festigkeit gestellt werden.As expected, the strength decreases with increasing magnetite content. In particular, for warp threads the magnetizable monofilaments are therefore less suitable because they are the strength carrier in tissues. On the other hand, they are well suited as weft threads, since no such high demands are placed on the strength here.
Besonders geeignet sind die erfindungsgemäßen Fasern als Schussfaden in umlaufenden Sieben, wie sie insbesondere in Papiermaschinen verwendet werden, hier speziell in den Formiersieben, Pressfilzen und Trockensieben.The fibers according to the invention are particularly suitable as weft threads in circumferential screens, as are used in particular in paper machines, in this case especially in the forming fabrics, press felts and dryer fabrics.
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- US 5577147 [0003] US 5577147 [0003]
- US 5274355 [0003] US 5274355 [0003]
- JP 5295647 [0003, 0005, 0006, 0006] JP 5295647 [0003, 0005, 0006, 0006]
- EP 0434448 A [0012] EP 0434448 A [0012]
- EP 735166 B1 [0012] EP 735166 B1 [0012]
- EP 735165 B1 [0012] EP 735165 B1 [0012]
- EP 976854 B1 [0012] EP 976854 B1 [0012]
Claims (1)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201110011126 DE102011011126A1 (en) | 2011-02-12 | 2011-02-12 | Core-sheath fiber, useful in conveyor belts, filter cloths or in paper machines, preferably in forming wire press fabrics and dryer fabrics comprises core comprising polymer, and sheath comprising polymer of core |
DE202011003102U DE202011003102U1 (en) | 2011-02-12 | 2011-02-24 | Magnetizable fibers and filaments as marking thread in conveyor belts |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201110011126 DE102011011126A1 (en) | 2011-02-12 | 2011-02-12 | Core-sheath fiber, useful in conveyor belts, filter cloths or in paper machines, preferably in forming wire press fabrics and dryer fabrics comprises core comprising polymer, and sheath comprising polymer of core |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102011011126A1 true DE102011011126A1 (en) | 2012-08-16 |
Family
ID=45999231
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE201110011126 Withdrawn DE102011011126A1 (en) | 2011-02-12 | 2011-02-12 | Core-sheath fiber, useful in conveyor belts, filter cloths or in paper machines, preferably in forming wire press fabrics and dryer fabrics comprises core comprising polymer, and sheath comprising polymer of core |
DE202011003102U Expired - Lifetime DE202011003102U1 (en) | 2011-02-12 | 2011-02-24 | Magnetizable fibers and filaments as marking thread in conveyor belts |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE202011003102U Expired - Lifetime DE202011003102U1 (en) | 2011-02-12 | 2011-02-24 | Magnetizable fibers and filaments as marking thread in conveyor belts |
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DE (2) | DE102011011126A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN113893616B (en) * | 2021-10-09 | 2023-07-04 | 安徽元琛环保科技股份有限公司 | Magnetic filter material and application thereof |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0434448A2 (en) | 1989-12-21 | 1991-06-26 | Hoechst Celanese Corporation | Method and apparatus for spinning bicomponent filaments and products produced therefrom |
JPH05295647A (en) | 1992-04-10 | 1993-11-09 | Nippon Felt Co Ltd | Magnetic material to be sensed |
US5274355A (en) | 1992-02-05 | 1993-12-28 | Louis Galan | System for monitoring pressure and temperature of pneumatic tires on a moving vehicle |
US5577147A (en) | 1994-03-31 | 1996-11-19 | Lucent Technologies Inc. | Magnetically locatable optical fiber cables containing integrated magnetic marker materials |
EP0735165B1 (en) | 1995-03-31 | 1999-09-29 | Hoechst Trevira GmbH & Co. KG | High resistance core-sheath monofilaments for technical applications |
EP0735166B1 (en) | 1995-03-31 | 1999-10-27 | Hoechst Trevira GmbH & Co. KG | High resistance core-sheath monofilaments for technical applications |
EP0976854B1 (en) | 1998-07-29 | 2004-11-10 | Teijin Monofilament Germany Gmbh | Monofilamentary bicomponent core-sheath fibres |
-
2011
- 2011-02-12 DE DE201110011126 patent/DE102011011126A1/en not_active Withdrawn
- 2011-02-24 DE DE202011003102U patent/DE202011003102U1/en not_active Expired - Lifetime
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0434448A2 (en) | 1989-12-21 | 1991-06-26 | Hoechst Celanese Corporation | Method and apparatus for spinning bicomponent filaments and products produced therefrom |
US5274355A (en) | 1992-02-05 | 1993-12-28 | Louis Galan | System for monitoring pressure and temperature of pneumatic tires on a moving vehicle |
JPH05295647A (en) | 1992-04-10 | 1993-11-09 | Nippon Felt Co Ltd | Magnetic material to be sensed |
US5577147A (en) | 1994-03-31 | 1996-11-19 | Lucent Technologies Inc. | Magnetically locatable optical fiber cables containing integrated magnetic marker materials |
EP0735165B1 (en) | 1995-03-31 | 1999-09-29 | Hoechst Trevira GmbH & Co. KG | High resistance core-sheath monofilaments for technical applications |
EP0735166B1 (en) | 1995-03-31 | 1999-10-27 | Hoechst Trevira GmbH & Co. KG | High resistance core-sheath monofilaments for technical applications |
EP0976854B1 (en) | 1998-07-29 | 2004-11-10 | Teijin Monofilament Germany Gmbh | Monofilamentary bicomponent core-sheath fibres |
Also Published As
Publication number | Publication date |
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DE202011003102U1 (en) | 2012-03-22 |
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R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee | ||
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Effective date: 20140902 |