EP3622105A1 - Textiles flächengebilde für die elektroisolation - Google Patents
Textiles flächengebilde für die elektroisolationInfo
- Publication number
- EP3622105A1 EP3622105A1 EP18716251.6A EP18716251A EP3622105A1 EP 3622105 A1 EP3622105 A1 EP 3622105A1 EP 18716251 A EP18716251 A EP 18716251A EP 3622105 A1 EP3622105 A1 EP 3622105A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- core
- sheath
- copolymers
- binder
- fibers
- 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.)
- Pending
Links
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
- D04H1/435—Polyesters
-
- 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
-
- 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
- D04H1/541—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres
-
- 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
- D04H1/541—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres
- D04H1/5412—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres sheath-core
-
- 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
- D04H1/541—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres
- D04H1/5418—Mixed fibres, e.g. at least two chemically different fibres or fibre blends
-
- 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
- D04H1/587—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 characterised by the bonding agents used
-
- 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
-
- 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
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/005—Synthetic yarns or filaments
- D04H3/009—Condensation or reaction polymers
- D04H3/011—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
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
- D04H3/14—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding
- D04H3/147—Composite yarns or filaments
Definitions
- the invention relates to a textile fabric, in particular for the
- fabrics for the electrical insulation of electrical devices are well known in the art.
- textile fabrics are used for the electrical insulation of electric motors, generators or transformers.
- films for example PET, PEN, PI, etc.
- films are laminated with the corresponding nonwovens, so that 2 or 3-layer laminates are formed with the structure of nonwoven film or nonwoven film nonwoven.
- DMD Dynamic - Mylard - Dacron
- the laminates are then used in motors / generators / transformers for insulation, e.g. as slot insulation, cover slide,
- Nonwoven material Field coil insulation, anchor insulation.
- Important requirements for the nonwoven material are: good laminating ability, resin absorption, uniformity of fiber distribution and thickness, high smoothness and the highest possible long-term temperature resistance.
- the nonwoven fabric can also be used directly, for example: for phase insulation / separation or all-round insulation.
- the nonwoven fabric is subsequently provided with a resin and thus receives its electrical insulating effect.
- Impregnation behavior air permeability -> conductivity through plane, highest possible long-term temperature resistance, sufficient mechanical properties for winding processes.
- an electrical laminating insulation element for an electrical device comprising a thermoplastic film positioned between, adjacent and fixed to two nonwoven sheets, each of the nonwoven sheets being made of multicomponent polymeric fibers.
- the multicomponent fibers may be core-sheath fibers in which the refractory polymer forms the sheath and the low-melting polymer forms the core of the fiber.
- the core consists of the low melting polymer (PET) and the shell of the refractory (PPS).
- Laminatisolationselement contains sulfur. In its degradation in the long-term use there is a risk that it may lead to the formation of acids and others Sulfur compounds and thus corrosion occurs. The presence of sulfur is therefore not desirable in the field of electrical insulation. Moreover, in the case of multicomponent fibers, there is also one
- WO 2006105836 A1 describes a thermally bonded nonwoven fabric comprising a low-shrinkage core-sheath bicomponent fiber, wherein the low-shrinkage core-sheath bicomponent fiber consists of a crystalline
- the core consists of
- PEN Polyethylene naphthalate
- the nonwoven fabric is used as a filter medium, membrane backing nonwoven and battery separator. It has excellent properties for these applications. However, especially for the electrical insulation, it has the disadvantage that it has too low a thermal stability due to the relatively low glass transition temperature of the polyester jacket.
- the invention is therefore based on the object, a textile fabric for electrical insulation, for example, for the electrical insulation of electric motors, generators or transformers to provide that the
- the present invention solves the above-mentioned object by a textile fabric, comprising a base body of at least one layer, wherein the at least one layer PEN, copolymers and / or blends thereof as a binder component, wherein the binder component by applying core / sheath binder fibers, in which the binder fiber coat polymer PEN, Copolymers and / or blends thereof, with temperatures above the glass transition temperature of the binder fiber shell polymer, is available.
- core / sheath fibers in which the sheath comprises PEN, copolymers and / or blends thereof are outstandingly suitable for providing high-temperature-resistant textile fabrics for electrical insulation.
- the PEN, the copolymers and / or blends thereof is present as the binding component.
- the binding component may be present in the form of a more or less deformed fiber structure up to a completely fused continuous phase.
- Binding component is unusual in the art because these materials tend to have a rather high melting point. According to the invention, however, it has been found that it is possible to use these materials below their melting point as a binding component, if their degree of crystallinity is set low.
- the binder component is producible starting from core / sheath binder fibers in which the binder fiber sheath polymer PEN, copolymers and / or blends thereof having a degree of crystallinity of less than 80%, for example from 0 to 75%, more preferably from 0 to 70% and especially from 0 up to 60%. That is, the binder fiber shell polymer used to make the binder component preferably has one of the aforementioned degrees of crystallinity.
- a low degree of crystallization can be achieved in a simple manner by the fact that the core / sheath binder fibers used to produce the sheet according to the invention are non-drawn fibers. So fibers with a high proportion of amorphous PEN, amorphous copolymers and / or amorphous blends thereof. In practical experiments was
- Cold crystallization temperature is understood to mean the temperature at which a first exothermic maximum of the free enthalpy occurs.
- exothermic is meant an energy release.
- PEN is characterized by very high thermal-electrical resistance in the product.
- PEN with the most diverse technically relevant polymers e.g. Polyesters well tolerated and thus easy to spin as a sheath in a core / sheath fiber. This makes it possible to realize even lower jacket thicknesses.
- the most diverse technically relevant polymers e.g. Polyesters well tolerated and thus easy to spin as a sheath in a core / sheath fiber. This makes it possible to realize even lower jacket thicknesses.
- the most diverse technically relevant polymers e.g. Polyesters well tolerated and thus easy to spin as a sheath in a core / sheath fiber. This makes it possible to realize even lower jacket thicknesses.
- the most diverse technically relevant polymers e.g. Polyesters well tolerated and thus easy to spin as a sheath in a core / sheath fiber. This makes it possible to realize even lower jacket thicknesses.
- the most diverse technically relevant polymers e.g. Polyesters well tolerate
- Polymers in their structure improved interface can be increased.
- Another advantage of using PEN compared to PPS is that it contains no sulfur.
- the shell of the core / sheath binder fibers used for the production of the textile fabric its advantageous properties, in particular its high thermal-electrical resistance and long-term stability, can be utilized particularly well. In addition, it can thereby act as protection for the internal fiber component.
- Storage at 1 60 ° C for 1 week prefers a percent reduction in maximum tensile force in at least one direction of less than 5%, preferably less than 4%, for example 0 to 4% and / or an increase in the maximum tensile force in at least one direction of at least 1%,
- the good storage stability is due to the fact that PEN has a comparatively high glass transition temperature.
- the degree of crystallization of the PEN component increases over time, which counteracts destabilization by thermal degradation processes.
- Binder fiber polymer has a cold crystallization temperature in the range of 70 to 200 ° C, more preferably in the range of 80 to 190 ° C, most preferably in the range of 90 to 175 ° C, on. Also preferably, the PEN, the copolymers and / or blends thereof in the binder fiber shell polymer and / or in the binding component one
- Melting temperature in the range of 180 to 320 ° C, more preferably in the range of 210 to 310 ° C, most preferably in the range of 230 to 300 ° C. These polymers are very suitable for thermal bonding.
- the binding component PEN is understood to mean polyethylene naphthalate, which may be in the form of a homopolymer, copolymer and / or blend thereof, the PEN in the copolymers and / or blends being mentioned as
- Main component is present, preferably in a proportion of more than 40 wt. %, more preferably more than 50% by weight, and more preferably more than 60% by weight and in particular more than 90% by weight.
- Suitable copolymers are, for example, random copolymers, gradient copolymers, alternating copolymers, block copolymers or graft polymers.
- the copolymers may consist of two, three, four or more different monomers (terpolymers, tetrapolymers).
- Particularly preferred further comonomers are monomers of the following polymers: aromatic and aliphatic polyesters, aromatic and aliphatic polyamides, aromatic and aliphatic
- Polyacrylates Polyacrylamides.
- Blend components polymers having a melting temperature in the range of 180 to 320 ° C, more preferably in the range of 210 to 300 ° C, most preferably in the range of 230 to 290 ° C and / or having a decomposition point in the range of 210 to 800 ° C, more preferably in the range of 300 to 750 ° C, most preferably in the range of 350 to 700 ° C.
- Particularly preferred further blend components are the following: aromatic polyesters, aromatic
- Polyamides Polyetheretherketone, poly (p-phenylene-2,6-benzobisoxazole), polyamideimide, polyphenylene sulfide.
- the PEN is in the
- Binder fiber coat polymer preferably in a proportion of more than 50% by weight, more preferably more than 75% by weight, even more preferably more than 90% by weight, and especially about 100% by weight, based in each case on the total weight of the jacket , where usual additives such as
- the fabric is preferably a nonwoven fabric.
- a nonwoven fabric is an assembly of limited length fibers, filaments or cut yarns of any type and origin that have been somehow joined together into a nonwoven (a fibrous layer, a batt) and bonded together in some manner; excluded from this is the crossing or entangling of yarns, such as weaving, knitting, knitting, lace making, braiding and the production of tufted products.
- Non-woven fabrics include films and papers.
- Sheath polymer various polymer (binder fiber core polymer) on.
- the binder fiber core polymer may or may not (partially) bind or not.
- the binder fiber core polymer can be partially or completely enclosed by the binding component. The ratio between binder fiber core and
- Binder fiber coat polymer can be chosen freely. Ratios of 90:10 to 10:90 (weight ratio core: mantle in% by weight), more preferably from 80:20 to 20:80, even more preferably from 80:20 to 30:70 and in particular from 80, have been found to be particularly favorable : 20 to 40: 60 proved.
- Binder fiber polymer has a higher melting point than that
- the difference in the melting temperatures of the binder fiber shell polymer and the binder fiber core polymer is preferably at least 2.5 ° C, preferably at least 5 ° C, more preferably at least 7.5 ° C.
- Glass transition temperature than the binder fiber core polymer preferably at least 10 ° C, more preferably at least 15 ° C. Preference is given to using polymers having a difference in the glass transition temperature of from 5 to 600.degree. C., more preferably from 10 to 500.degree. C., particularly preferably from 15 to 200.degree.
- the binder fiber core polymer may contain a variety of materials.
- the binder fiber core polymer is melt spinnable.
- the binder fiber core polymer is a polyester selected from the group consisting of polyethylene terephthalate, polypropylene terephthalate,
- Polytetramethylene terephthalate poly (decamethylene) terephthalate, poly-1, 4-cyclohexylenedimethyl terephthalate, polybutylene terephthalate,
- Sheets containing the aforementioned polymers are easy to recycle.
- the binder fiber core polymer is selected from the group consisting of poly (decamethylene) terephthalate, poly-1, 4-cyclohexylenedimethyl terephthalate, polybutylene terephthalate, Polyethylene naphthalate, more preferably polyethylene naphthalate,
- the binder fiber core polymer contains polyethylene terephthalate and / or co-polyethylene terephthalate.
- copolymers which are used are random copolymers, gradient copolymers,
- alternating copolymers, block copolymers or graft polymers are suitable.
- the copolymers may consist of two, three, four or more different monomers (terpolymers, tetrapolymers). Especially preferred others
- Comonomers are monomers of the following polymers: aromatic and
- Polysiloxanes, polyacrylates, polyacrylamides are Polysiloxanes, polyacrylates, polyacrylamides.
- Binder fiber core polymer of from 5 to 100% by weight, more preferably from 50 to 100% by weight and especially from 75 to 100% by weight, based in each case on the total weight of the core, conventional additives such as e.g. Spinning aids, nucleating additives, matting agents and impurities, e.g.
- Catalyst residues should not be considered.
- preferred further blend components are polymers having a melting temperature in the range from 180 to 320 ° C., more preferably in the range from 210 to 300 ° C., most preferably in the range from 230 to 290 ° C. and / or with a decomposition point in the range of 210 to 800 ° C, more preferably in the range of 300 to 750 ° C, most preferably in the range of 350 to 700 ° C.
- a melting temperature in the range from 180 to 320 ° C., more preferably in the range from 210 to 300 ° C., most preferably in the range from 230 to 290 ° C. and / or with a decomposition point in the range of 210 to 800 ° C, more preferably in the range of 300 to 750 ° C, most preferably in the range of 350 to 700 ° C.
- Especially preferred others are polymers having a melting temperature in the range from 180 to 320 ° C., more preferably in the range from 210 to 300 ° C.
- Blend components are the following: aromatic polyesters, aromatic amino acids, aromatic amino acids, aromatic amino acids, aromatic amino acids, aromatic amino acids, aromatic amino acids, aromatic amino acids, aromatic amino acids, aromatic amino acids, aromatic amino acids, aromatic amino acids, aromatic amino acids, aromatic amino acids, aromatic amino acids, aromatic amino acids, aromatic amino acids, aromatic amino acids, aromatic amino acids, aromatic amino acids, aromatic amino acids, aromatic amino acids, aromatic amino acids, aromatic amino acids, aromatic amino acids, aromatic amino acids
- Polyamides polyetheretherketone (PEEK), polybenzobisoxazoles (PBO),
- Polyamide-imide PAI
- PPS polyphenylene sulfide
- the binder fiber core polymer has a melting temperature in the range of 180 to 320 ° C, more preferably in the range of 210 to 300 ° C, most preferably in the range of 230 to 290 ° C and / or a
- Decomposition point in the range of 210 to 800 ° C, more preferably in the range of 300 to 750 ° C, most preferably in the range of 350 to 700 ° C.
- the matrix fibers are present in a significantly clearer fibrous form.
- the cores of the core / sheath binder fibers used for the production of the fabric can function as matrix fibers.
- further fibers are used as the matrix fibers.
- the difference in degree of crystallinity between the sheath of the core / sheath binder fibers and the degree of crystallinity of the matrix fibers prior to the thermal treatment is at least 5%, for example from 5 to 80%, more preferably at least 7.5%, for example from 7.5 to 70%. and in particular at least 10%, for example from 10 to 60%, wherein the degree of crystallinity of the matrix fibers is higher than the degree of crystallinity of the sheath of the core / sheath binder fibers.
- Core / sheath binder fibers with a low degree of crystallinity can be produced in a simple manner, for example by Melt spinning can be obtained in which dispensed with a stretching step.
- the matrix fibers are formed as core / sheath matrix fibers, comprising
- Matrix fiber shell polymer and a matrix fiber core polymer Preferably, the difference in degree of crystallinity between the shell is
- Matrix fiber shell polymer prior to the thermal treatment at least 5%, for example from 5 to 80%, more preferably at least 7.5%, for example from 7.5 to 70% and in particular at least 10%, for example from 10 to 60%, wherein the degree of crystallinity of
- Matrix fiber polymer is higher than the degree of crystallinity of the sheath of the core / sheath binder fibers.
- the matrix fiber sheath polymer may be selected from the same polymers as those used for the sheath polymer of the invention for the preparation of
- Binding component used core / sheath binder fibers are described.
- the matrix fiber core polymer can also be made from the same polymers
- the core polymer of the core / sheath binder fibers used for the preparation of the binding component may be selected as described for the core polymer of the core / sheath binder fibers used for the preparation of the binding component.
- the matrix fiber shell polymer is selected from PEN,
- Copolymers and / or blends thereof and / or the matrix fiber core polymer of polyethylene terephthalate and / or co-polyethylene terephthalate are preferred.
- the proportion of PEN, copolymers and / or blends thereof on the one hand and polyethylene terephthalate and / or co-polyethylene terephthalate taken together on the other hand more than 80 wt.%, Preferably more than 90 wt.%, More preferably more than 95 Wt.% And in particular more than 97 wt.%, Each based on the
- PEN is used as blend and / or copolymer
- preferred further blend components and preferred copolymers and preferred ratios are those already mentioned above with respect to the binder component.
- Quantity ratios of the core / sheath binder fibers used for the preparation of the binder component and for the production of the matrix fibers
- used core / shell matrix fibers are independently selected.
- Matrix fiber polymer can be different. This makes it possible to easily set different melting ranges.
- the invention preferably contains the binder fiber shell polymer and the
- Matrix fiber shell polymer the same polymers or copolymers or blends, however, as explained above, differ in their crystallinity before the thermal treatment.
- the retention of the fiber structure of the matrix fibers during the thermal treatment in the manufacture of the sheet can be achieved by adjusting a higher degree of crystallinity of the matrix fibers compared to the sheath of the core / sheath binder fibers as described above.
- the fibers used to make the fabric may be any material.
- the fibers are staple fibers and / or short cut fibers.
- Staple fibers, or short cut fibers can by the most diverse known manufacturing processes are manufactured and laid, for example, carding, airlaid, wetlaid process.
- the proportion of the binding component is 5 to 75 wt.%, Preferably from 5 to 65 wt.% In particular from 10 to 55 wt.%, Each based on the total weight of the sheet.
- the fiber diameter of the core / sheath binder fibers and the matrix fibers is, independently of one another, preferably in the range from 0.1 to 20 dtex, more preferably in the range from 0.1 to 15 dtex, particularly preferably in the range from 0.1 to 10 dtex. More preferably, the length of the
- Core / sheath binder fibers from 1 to 90 mm and / or the length of the matrix fibers from 1 to 90 mm, unless they are present as filaments. Since, of course, the shape of at least the core / sheath binder fibers may change during the thermal treatment, the aforementioned fiber dimensions are related to the state prior to the thermal treatment.
- the sheet preferably contains no further fibers or further fibers only in a proportion of less than 60% by weight, for example from 0 to 60% by weight and / or from 5 to 60% by weight.
- the fabric contains further fibers, they are preferably configured as monofilaments.
- these have a melting point or decomposition point of more than 210 ° C, for example from 210 to 2000 ° C, more preferably from 220 to 2000 ° C and in particular from 250 to 2000 ° C.
- the further fibers are preferably selected from the group consisting of: polyester, in particular, polybutylene terephthalate; Polyamide, especially polyamide 6.6 ( Nylon® ), polyamide 6.0 ( Perlon® ), meta-aramid, para-aramid; aromatic polyamides, polyvinyl chloride, polyacrylonitrile, polyimide,
- Polyamideimide polytetrafluoroethylene (Teflon ®) -, phenolic resin, LCP (liquid crystal polymer), glass, basalt fibers.
- further fibers selected from the group consisting of: polyamide, poly-p-phenylene terephthalamide, poly-m-phenylene terephthalamide, polyester fibers and mixtures thereof. Due to its good mechanical properties, thermal stability and cost-effectiveness, polyester and in particular polyethylene terephthalate, meta-aramid and / or para-aramid are particularly preferred.
- Embodiment of the invention by a weight-related machine direction (MD) tensile strength of more than 0.25 N / g, for example from 0.25 to 12 N / g, preferably from 0.5 to 10 N / g and particularly preferably from 0, 75 to 8 N / g.
- MD machine direction
- the high tensile strength is advantageous, for example, for the use of the sheet for the sheath of conductors, as a certain strength for the conductor manufacturing process, in which the materials are applied, for example, as a wrap, is necessary.
- the tensile strengths can be set to preferred values, for example from 15 to 800 N and / or from 25 to 700 N and / or from 35 to 600 N, measured according to DIN ISO 9073-3, depending on the particular application.
- the textile Sheet material the aforementioned high tensile strengths in the machine direction already at low thicknesses, for example below 3 mm, such as in the range of 0.02 mm to 2 mm, on.
- the textile fabric can be manufactured in a wide variety of thickness ranges. This allows the use of a tailor-made textile fabric with regard to the most diverse applications in the field of electrical insulation. It has proven to be preferable if the textile fabric has thicknesses according to DIN EN 9073-2 in the range of 0.01 to 2 mm, 0.01 to 1, 7 mm and / or 0.02 to 1, 5 mm.
- the sheet according to the invention is suitable for a wide variety of applications, preferably for the production of electrical insulating materials, for example for the electrical insulation of electric motors, generators or transformers, in particular for the production of (flexible)
- it can be manufactured in a variety of forms, for example in the form of a slot lining, a closure, a wedge, a rod, as a wrapping, as a separation layer in ring form or bandage in the cable.
- the fabric of the invention is also particularly suitable.
- the textile fabric preferably has a basis weight according to DIN EN 29073-1 of 20 to 400 g / m 2, preferably of 20 to 300 g / m 2, in particular of 30 to 250 g / m 2. Inventive fabrics with such basis weights have excellent stability.
- the textile fabric preferably has an air permeability measured in accordance with DIN EN ISO 9237 of 5 to 800 l / m 2 * sec, preferably of 10 to 700 l / m 2 * s and in particular of 15 to 600 l / m 2 * s .
- Weight-related means that for the sheet according to the invention a
- Air permeability of preferably 0.15 to 200 l / sec * g, preferably from 0.25 to 175 l / sec * g and in particular from 0.35 to 150 l / sec * g.
- Embodiment of the invention the sheet according to the invention on a coating and or impregnation with a resin.
- the sheet has a reinforcing layer, for example a plastic film. As a result, a sheet with high mechanical strength and low weight is obtained.
- the sheet is constructed in multiple layers.
- the sheet contains at least one further layer in addition to the main body.
- the further layers could be configured as spunbond layers or staple fiber layers.
- the other layers can be differ from each other by their function, type of production, fiber type, containing polymers and / or by their color.
- an anti-pilling treatment for example, an anti-pilling treatment, a hydrophilization or hydrophobing, an antistatic treatment, a treatment to improve the fire resistance and / or to change the tactile
- Properties or gloss a mechanical treatment such as roughening, sanforizing, sanding or a treatment in the tumbler and / or a treatment to change the appearance such as dyeing or printing.
- the textile fabric may also be expedient to subsequently provide the textile fabric with one or more additives, for example to coat, the additives being selected, for example, from carbonates, in particular calcium carbonate, carbon blacks, in particular carbon black, graphites, ion exchange resins, activated carbons, silicates,
- the additives being selected, for example, from carbonates, in particular calcium carbonate, carbon blacks, in particular carbon black, graphites, ion exchange resins, activated carbons, silicates,
- talc talc
- clay talc
- mica silica
- zeolites chalk
- calcium and barium sulfate aluminum hydroxide
- glass fibers and spheres wood flour, cellulose powder, powdered superabsorber, perlite, cork or
- Plastic granules, ground thermoplastics, cotton, carbon fibers, in particular ground carbon fibers and mixtures thereof By adding a filler and / or additive, for example, the
- Improvement of the adhesion of the additive and / or filler may include
- Adhesive / binder can be used, for example based on
- the layers in the fabric according to the invention preferably the at least one layer and / or the further layers of the base body, as a scrim, tissue,
- Knitted fabric, knitted fabric, film, foil, nonwoven, or nonwoven fabric configured. As a result, a sheet with high mechanical strength can be obtained.
- the at least one layer is particularly preferably configured as a nonwoven fabric.
- the invention also includes a method for producing the
- a textile fabric which comprises a base body of at least one layer, wherein the at least one layer
- PEN copolymers and / or blends thereof as a binding component.
- the first method step comprises the provision of
- the application of temperature to the layer could take place in an oven and / or in a calender, in air or in an inert
- Atmosphere or under vacuum Exemplary temperatures are in the range 100 to 290 ° C, preferably from 1 10 to 280 ° C.
- preferred pressures are line pressures of 20 to 350 N / mm, preferably 40 to 300 N / mm, and more preferably 50 to 275 N / mm.
- the starting materials used according to the invention are preferably the materials already discussed above with reference to the fabric in the forms, proportions, etc. described.
- core / sheath binder fibers and / or matrix fibers staple fibers (preferably with a length of 1 to 120 mm) and / or continuous fibers (filaments) can be used.
- the core / sheath binder fibers and / or matrix fibers have a linear density of from 0.1 to 50 dtex, more preferably from 1.0 to 40 dtex.
- sheath PEN / core PET Core / sheath fiber
- Fiber titer 4.8 dtex
- Core / sheath binder fiber for the production of the binding component
- sheath PEN / core PET 5 core / sheath binder fiber (sheath PEN / core PET)
- a batt is placed on a random mats with MD orientation and
- inventive sheet 1 -4 are obtained.
- Example 1 was compressed at 50 N / mm, Example 2 with
- a 60 g / m 2 nonwoven made of 100% PET was used.
- Comparative Example 1 shows a constant loss of
- Crystallization and fusion enthalpies were measured by DSC according to DIN EN ISO 1 1357-2 (Issue: 2014-07). The melting points correspond to the temperatures at the maxima of the endothermic enthalpy of fusion. The exothermal crystallization enthalpies and the endothermal
- the degrees of crystallinity can be calculated from the ratio of the melting and crystallization enthalpies ("Thermoplastic Materials: Properties, Manufacturing Methods, and Applications ", Cristopher C. Ibeh, CRC Press, ISBN: 13: 978-1 - 4200-9384-1, p. 105 ff.) According to:
- Crystallization enthalpies defined as boundary. The procedure was analogous in the case of the enthalpy of fusion of the matrix fiber.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Multicomponent Fibers (AREA)
- Nonwoven Fabrics (AREA)
- Organic Insulating Materials (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
- Artificial Filaments (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017004481.3A DE102017004481A1 (de) | 2017-05-11 | 2017-05-11 | Textiles Flächengebilde für die Elektroisolation |
PCT/EP2018/058832 WO2018206203A1 (de) | 2017-05-11 | 2018-04-06 | Textiles flächengebilde für die elektroisolation |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3622105A1 true EP3622105A1 (de) | 2020-03-18 |
Family
ID=61911621
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18716251.6A Pending EP3622105A1 (de) | 2017-05-11 | 2018-04-06 | Textiles flächengebilde für die elektroisolation |
Country Status (8)
Country | Link |
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US (1) | US12098482B2 (de) |
EP (1) | EP3622105A1 (de) |
JP (1) | JP7216015B2 (de) |
KR (1) | KR102276864B1 (de) |
CN (1) | CN111032941B (de) |
DE (1) | DE102017004481A1 (de) |
TW (1) | TWI775846B (de) |
WO (1) | WO2018206203A1 (de) |
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JPS5898526A (ja) | 1981-12-04 | 1983-06-11 | Kazumi Yamaoka | コンクリ−トマツト用コンクリ−ト打設工法 |
JPS5898426A (ja) * | 1981-12-07 | 1983-06-11 | Teijin Ltd | 芯鞘型複合繊維 |
JP2977679B2 (ja) * | 1992-09-25 | 1999-11-15 | 帝人株式会社 | 芯鞘型複合繊維およびその製造方法 |
JPH073534A (ja) * | 1993-06-11 | 1995-01-06 | Toyobo Co Ltd | 低収縮熱接着繊維 |
CN1050619C (zh) * | 1993-09-09 | 2000-03-22 | 钟纺株式会社 | 生物分解性聚酯共聚合物、使用它的成形品及该成形品的制法 |
JP3627230B2 (ja) * | 1997-09-08 | 2005-03-09 | 日産自動車株式会社 | クッション材およびその製造方法 |
KR100488245B1 (ko) * | 1997-09-09 | 2005-08-10 | 주식회사 코오롱 | 열가소성합성섬유부직포및그의제조방법 |
DE19834008C2 (de) | 1998-07-29 | 2000-11-30 | Johns Manville Int Inc | Monofile Bikomponentenfäden des Kernmanteltyps, Verfahren zu deren Herstellung und deren Verwendung |
US20020193030A1 (en) * | 2001-04-20 | 2002-12-19 | Li Yao | Functional fibers and fibrous materials |
US6670034B2 (en) * | 2001-10-18 | 2003-12-30 | Shakespeare Company, Llc | Single ingredient, multi-structural filaments |
JP4027728B2 (ja) * | 2002-06-21 | 2007-12-26 | 帝人ファイバー株式会社 | ポリエステル系短繊維からなる不織布 |
JP2005264344A (ja) * | 2004-03-16 | 2005-09-29 | Toray Ind Inc | 低収縮性熱接着繊維およびそれを用いた不織布 |
DE102005015550C5 (de) * | 2005-04-04 | 2013-02-07 | Carl Freudenberg Kg | Verwendung eines thermisch gebundenen Vliesstoffs |
US9922634B2 (en) * | 2006-06-30 | 2018-03-20 | 3M Innovative Properties Company | Sound insulation constructions and methods of using the same |
EP2594668B1 (de) * | 2007-02-28 | 2015-01-07 | Toray Industries, Inc. | Flüssigkristallpolyesterfaser |
US20080284555A1 (en) * | 2007-05-18 | 2008-11-20 | Levit Mikhail R | Process for refurbishing an electrical device component comprising a laminate electrical insulation part and electrical device component comprising said part |
WO2009062543A1 (en) * | 2007-11-13 | 2009-05-22 | Abb Research Ltd | Fiber-reinforced composite system as electrical insulation |
WO2009113184A1 (ja) * | 2008-03-14 | 2009-09-17 | 帝人ファイバー株式会社 | ポリエチレンナフタレート繊維及びその製造方法 |
KR20090114708A (ko) * | 2008-04-30 | 2009-11-04 | 웅진케미칼 주식회사 | 광변조 물체 |
US20100151760A1 (en) * | 2008-12-15 | 2010-06-17 | E. I. Du Pont De Nemours And Company | Non-woven sheet containing fibers with sheath/core construction |
US8389426B2 (en) * | 2010-01-04 | 2013-03-05 | Trevira Gmbh | Bicomponent fiber |
JPWO2012057105A1 (ja) * | 2010-10-27 | 2014-05-12 | 帝人株式会社 | バイオマス由来ポリエステル短繊維およびそれからなる湿式不織布 |
JP2012158056A (ja) * | 2011-01-31 | 2012-08-23 | Dainippon Printing Co Ltd | 積層体およびその製造方法 |
JP5613095B2 (ja) * | 2011-03-30 | 2014-10-22 | 株式会社クラレ | 熱膨張性不織布及びこれを用いた嵩高不織布の製造方法 |
JP5917944B2 (ja) * | 2012-02-23 | 2016-05-18 | 日東電工株式会社 | 混紡不織布、フィルタ濾材およびフィルタユニット |
CN104755665B (zh) * | 2012-09-07 | 2017-07-11 | 帝人株式会社 | 无纺布结构体及其制造方法 |
EP3052688B1 (de) * | 2013-10-02 | 2019-01-16 | Carl Freudenberg KG | Flächengebilde mit hoher temperaturstabilität |
JP6537431B2 (ja) * | 2015-10-09 | 2019-07-03 | 日本エステル株式会社 | 芯鞘複合バインダー繊維 |
-
2017
- 2017-05-11 DE DE102017004481.3A patent/DE102017004481A1/de active Pending
-
2018
- 2018-04-06 US US16/611,865 patent/US12098482B2/en active Active
- 2018-04-06 KR KR1020197034287A patent/KR102276864B1/ko active IP Right Grant
- 2018-04-06 WO PCT/EP2018/058832 patent/WO2018206203A1/de unknown
- 2018-04-06 EP EP18716251.6A patent/EP3622105A1/de active Pending
- 2018-04-06 JP JP2019561916A patent/JP7216015B2/ja active Active
- 2018-04-06 CN CN201880031185.9A patent/CN111032941B/zh active Active
- 2018-05-04 TW TW107115143A patent/TWI775846B/zh active
Also Published As
Publication number | Publication date |
---|---|
DE102017004481A1 (de) | 2018-11-15 |
TW201900965A (zh) | 2019-01-01 |
US12098482B2 (en) | 2024-09-24 |
CN111032941B (zh) | 2023-10-03 |
KR20190136087A (ko) | 2019-12-09 |
KR102276864B1 (ko) | 2021-07-12 |
CN111032941A (zh) | 2020-04-17 |
JP2020525658A (ja) | 2020-08-27 |
JP7216015B2 (ja) | 2023-01-31 |
WO2018206203A1 (de) | 2018-11-15 |
US20200115826A1 (en) | 2020-04-16 |
TWI775846B (zh) | 2022-09-01 |
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