EP0122967A2 - Etoffe isolante plate et procédé pour sa fabrication - Google Patents

Etoffe isolante plate et procédé pour sa fabrication Download PDF

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Publication number
EP0122967A2
EP0122967A2 EP83112236A EP83112236A EP0122967A2 EP 0122967 A2 EP0122967 A2 EP 0122967A2 EP 83112236 A EP83112236 A EP 83112236A EP 83112236 A EP83112236 A EP 83112236A EP 0122967 A2 EP0122967 A2 EP 0122967A2
Authority
EP
European Patent Office
Prior art keywords
fibers
layers
weight
insulating material
polyester
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP83112236A
Other languages
German (de)
English (en)
Other versions
EP0122967A3 (en
EP0122967B1 (fr
Inventor
Werner Schäfer
Dieter Dr. Groitzsch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Carl Freudenberg KG
Original Assignee
Carl Freudenberg KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6197121&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0122967(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Carl Freudenberg KG filed Critical Carl Freudenberg KG
Publication of EP0122967A2 publication Critical patent/EP0122967A2/fr
Publication of EP0122967A3 publication Critical patent/EP0122967A3/de
Application granted granted Critical
Publication of EP0122967B1 publication Critical patent/EP0122967B1/fr
Expired legal-status Critical Current

Links

Classifications

    • 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
    • D04H1/54—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 welding together the fibres, e.g. by partially melting or dissolving
    • D04H1/542—Adhesive fibres
    • D04H1/55—Polyesters
    • 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
    • D04H1/4342—Aromatic polyamides
    • 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
    • D04H1/435—Polyesters
    • 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
    • D04H1/54—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 welding together the fibres, e.g. by partially melting or dissolving
    • 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
    • D04H1/54—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 welding together the fibres, e.g. by partially melting or dissolving
    • D04H1/559—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 welding together the fibres, e.g. by partially melting or dissolving the fibres being within layered webs
    • 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
    • D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D04H1/74—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being orientated, e.g. in parallel (anisotropic fleeces)

Definitions

  • Flexible surface insulating materials are used, for example, in standard motors for phase separation, as slot insulation All-round insulation or deck slider used. They continue to be used as insulating material in dry-type transformers for layer insulation.
  • Multi-layer insulation materials based on polyester films film thickness: 0.03 mm to 0.3 mm
  • the multilayer structures usually have a thickness between 0.09 and 0.5 mm. They can be impregnated with insulating resins.
  • Non-laminate nonwovens For phase insulation in standard motors of insulation class F (155 ° C) and for layer insulation in transformers, thermally bound, i.e. Non-laminate nonwovens commonly used. These consist of polyester or aramid fibers, which are laid in a tangled fiber structure. The fiber thickness is usually 1.6 to 3.3 dtex. The ability of such nonwovens to be impregnated with insulating resins or insulating lacquers is very good, but the nonwovens have only relatively low dielectric strengths when not soaked.
  • the insulating materials are usually 0.1 to 0.7 mm thick. With a thickness of 0.2 mm e.g. the electrical breakdown voltage (ball / ball electrode) 0.6 to 1.8 KV.
  • the known, mostly single-layer nonwovens do not meet the above requirements. In particular, they have an insufficient dielectric strength when not soaked. It is therefore important to use aramid paper and multilayer insulating materials, e.g. based on polyester film as a carrier of electrical dielectric strength. In addition to its property as a carrier of the dielectric properties, the polyester film is also to be regarded as a component providing stiffness, the nonwovens or aramid papers laminated on one or both sides having the mechanical properties, e.g. influence the tear or tear strength and serve as carrier media for the insulating resins or varnishes.
  • the invention is based on the object of developing a flexible surface insulating material with a high dielectric strength, which is nevertheless stiff and cannot be excessively compressed.
  • the dielectric strength should be at least 30 KV / mm.
  • the surface insulating material should be free of laminating adhesives and should be soaked with insulating liquids. Even when not soaked, the insulating material should have a significantly improved electrical dielectric strength.
  • the object of the invention is achieved by the surface insulating material set out in the claims. According to the invention, a method for producing these substances is also proposed.
  • the surface insulating material is always made up of several, adhesive-free by calendering with interconnected nonwoven layers.
  • the stretched polyester and / or aramid fibers of the nonwoven are mixed with undrawn polyester fibers as binding fibers.
  • Polyethylene glycol terephthalate fibers are preferred as polyester fibers.
  • Polyester fibers based on poly (1,4-dimethylol) cyclohexane terephthalate are also very suitable.
  • Preferred aramid fibers are aramids based on aromatic poly-1,3-phenylene isophthalamide and poly-p-phenylene terephthalamide.
  • the multilayer structure consists of at least two layers. At least three layers are preferred. It is expedient to lay down the fibers of the piles which are later consolidated to form the nonwoven fabric in different orientations.
  • layers of longitudinal and transverse pile are alternately deposited with the aid of carding or carding devices.
  • the outer layers are longitudinal, while the inner layer is transverse.
  • the pile layers are then thermally consolidated to form the surface insulating material according to the invention.
  • the middle layer consists of a wet-laid nonwoven fabric of the fiber composition defined above.
  • the outer Nonwovens are thermally bonded nonwovens, formed by carding or carding machines and in particular spunbonded nonwovens.
  • a line pressure of the calender between 100 and 180 kp / cm is expediently maintained during the consolidation.
  • the calender temperature of the steel roller is 190 to 220 ° C.
  • Line pressure and calender temperature can be varied according to the product manufactured.
  • a particularly good result is e.g. at a line pressure of the calender of 140 to 160 kp / cm and a roller temperature of 210 ° C when a three-layer structure with a final thickness of 1.2 mm is produced.
  • the mixtures which are expedient for the respective area of application are selected, and according to the application, the term "fibers" means both staple fibers and continuous fibers. It is preferred if the outer layers each contain fewer binding fibers.
  • a mixture of 85 to 30% by weight, based on the total weight of the fibers, of stretched polyester and / or aramid fibers of a strength of 1.0 to 6.7 dtex together with 15 to 70% by weight of undrawn polyester fibers has proven useful Thickness from 0.8 to 8 dtex.
  • the outer layers composed in this way are generally longitudinal.
  • the inner layer which is expediently laid crosswise, consists of 50 to 100% by weight of undrawn polyester fibers, which are also binding fibers. These binding fibers have a thickness of 0.5 to 6.7 dtex. They are optionally used together with up to 50% by weight of stretched polyester and / or aramid fibers.
  • the weight of the cover layer is between 10 and 100 g / m2, with a total thickness of 0.2 mm, for example, about 30 g / m2.
  • a transversely laid middle layer of 80 to 100% by weight of undrawn polyester fibers (thickness 0.8 dtex) is then arranged between these longitudinally oriented layers.
  • the weight of this layer is between 50 and 350 g / sqm. With a total thickness of 0.2 mm, the weight is about 150 g / sqm.
  • the surface insulating material can be soaked excellently with conventional insulating liquids and is free of laminating adhesives due to its special structure and the proposed hardening process.
  • the special fiber arrangement ensures particularly high mechanical strength.
  • the always very high rigidity can be varied depending on the structure and thickness.
  • the compressibility is optimally low.
  • the following example shows a preferred manufacturing process for the surface insulating material.
  • a longitudinally oriented layer of a mixture of 30% by weight of undrawn polyethylene glycol terephthalate fibers is first deposited together with 70% by weight of drawn polyethylene glycol terephthalate fibers.
  • the strength of the drawn fibers is 1.7 dtex, while the undrawn fibers are 5.7 dtex strong.
  • the weight of the pile layer is 30 g / sqm.
  • a cross-laid pile of 90% by weight of undrawn polyethylene glycol terephthalate fibers with a thickness of 0.8 dtex is placed on this layer.
  • the weight of this layer is 90 g / m 2 .
  • a further longitudinally oriented layer of the composition specified above is then applied.
  • the stretching of the polyethylene glycol terephthalate fibers is 3 to 4 times that of the undrawn polyethylene glycol terephthalate fibers.
  • the three-layer structure is passed through a calender, the roll temperature of which is 210 ° C. With a line pressure of 150 kp / cm, the multilayer structure is solidified. It has a final thickness of 1.2 mm. The dielectric strength is about 35 KV / mm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Laminated Bodies (AREA)
  • Organic Insulating Materials (AREA)
EP83112236A 1983-04-22 1983-12-06 Etoffe isolante plate et procédé pour sa fabrication Expired EP0122967B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3314691A DE3314691C1 (de) 1983-04-22 1983-04-22 Flaechenisolierstoff und Verfahren zu seiner Herstellung
DE3314691 1983-04-22

Publications (3)

Publication Number Publication Date
EP0122967A2 true EP0122967A2 (fr) 1984-10-31
EP0122967A3 EP0122967A3 (en) 1987-02-04
EP0122967B1 EP0122967B1 (fr) 1989-07-12

Family

ID=6197121

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83112236A Expired EP0122967B1 (fr) 1983-04-22 1983-12-06 Etoffe isolante plate et procédé pour sa fabrication

Country Status (2)

Country Link
EP (1) EP0122967B1 (fr)
DE (2) DE3314691C1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0199901A2 (fr) * 1985-03-29 1986-11-05 Firma Carl Freudenberg Support pour membrane semi-perméable et son procédé de fabrication
WO2009024396A1 (fr) * 2007-08-22 2009-02-26 Eswegee Vliesstoff Gmbh Non-tissé de base pour stratifiés à trois couches
WO2009024393A1 (fr) * 2007-08-22 2009-02-26 Eswegee Vliesstoff Gmbh Procédé pour produire un non-tissé de base servant de support de revêtement
WO2013187956A1 (fr) * 2012-06-15 2013-12-19 3M Innovative Properties Company Matériau d'isolation électrique
US9437348B2 (en) 2010-12-17 2016-09-06 3M Innovative Properties Company Electrical insulation material
EP3088581B1 (fr) 2013-12-27 2020-02-26 Nihon Tokushu Toryo Co., Ltd. Feutre, matériau d'insonorisation et procédé de production d'un matériau d'insonorisation

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1117079B (de) * 1955-09-02 1961-11-16 Minnesota Mining & Mfg Biegsames Vlies aus vereinigten Polyesterfasern
FR1518995A (fr) * 1967-02-17 1968-03-29 Produit textile non tissé et son procédé de fabrication
FR2307345A1 (fr) * 1975-04-10 1976-11-05 Rhone Poulenc Textile Nouveau materiau isolant electrique
DE2533017B2 (de) * 1975-03-14 1978-11-16 The Kendall Co., Walpole, Mass. (V.St.A.) Aus einem Faservlies bestehendes elektrisches Isoliermaterial

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1117079B (de) * 1955-09-02 1961-11-16 Minnesota Mining & Mfg Biegsames Vlies aus vereinigten Polyesterfasern
FR1518995A (fr) * 1967-02-17 1968-03-29 Produit textile non tissé et son procédé de fabrication
DE2533017B2 (de) * 1975-03-14 1978-11-16 The Kendall Co., Walpole, Mass. (V.St.A.) Aus einem Faservlies bestehendes elektrisches Isoliermaterial
FR2307345A1 (fr) * 1975-04-10 1976-11-05 Rhone Poulenc Textile Nouveau materiau isolant electrique

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0199901A2 (fr) * 1985-03-29 1986-11-05 Firma Carl Freudenberg Support pour membrane semi-perméable et son procédé de fabrication
EP0199901A3 (fr) * 1985-03-29 1989-08-16 Firma Carl Freudenberg Support pour membrane semi-perméable et son procédé de fabrication
WO2009024396A1 (fr) * 2007-08-22 2009-02-26 Eswegee Vliesstoff Gmbh Non-tissé de base pour stratifiés à trois couches
WO2009024393A1 (fr) * 2007-08-22 2009-02-26 Eswegee Vliesstoff Gmbh Procédé pour produire un non-tissé de base servant de support de revêtement
US9437348B2 (en) 2010-12-17 2016-09-06 3M Innovative Properties Company Electrical insulation material
WO2013187956A1 (fr) * 2012-06-15 2013-12-19 3M Innovative Properties Company Matériau d'isolation électrique
US9754701B2 (en) 2012-06-15 2017-09-05 3M Innovative Properties Company Electrical insulation material
EP3088581B1 (fr) 2013-12-27 2020-02-26 Nihon Tokushu Toryo Co., Ltd. Feutre, matériau d'insonorisation et procédé de production d'un matériau d'insonorisation

Also Published As

Publication number Publication date
EP0122967A3 (en) 1987-02-04
DE3314691C1 (de) 1984-10-25
EP0122967B1 (fr) 1989-07-12
DE3380179D1 (en) 1989-08-17

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