CN102330380A - Mica paper and production method and application thereof - Google Patents
Mica paper and production method and application thereof Download PDFInfo
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- CN102330380A CN102330380A CN2010102248643A CN201010224864A CN102330380A CN 102330380 A CN102330380 A CN 102330380A CN 2010102248643 A CN2010102248643 A CN 2010102248643A CN 201010224864 A CN201010224864 A CN 201010224864A CN 102330380 A CN102330380 A CN 102330380A
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Abstract
The invention discloses a mica paper, which consists of fibers and mica powder, the fibers are uniformly distributed in the mica layer, moreover, the quantity of the fibers is 2 to 50 percent of the total weight of the mica paper, wherein the fibers are poly-diphenylsulfone-diphenyldiformamide fibers. The invention has the following advantages: (1), the mechanical strength of the mica paper is enhanced; (2) a relatively loose structure and voids with certain continuity are formed in the mica layer, and thereby the air permeability of a mica tape can be increased, which is more favorable for the impregnation of resin into the mica tape; (3) compared with the mechanical strength of the low-resin mica tape produced by the current domestic technique, the mechanical strength of the mica tape is enhanced, consequently, the mica tape can endure higher pulling force in the process of winding an insulation, and thereby the insulation can be more tightly wound; (4) the used heat-resistant organic fibers are better than Nomex fibers in terms of heat resistance, impregnability, radiation resistance, high-temperature dimensional stability, fire resistance and chemical stability, and also have excellent electrical insulation property.
Description
Technical field
The present invention relates to a kind of manufacturing that contains the mica paper of PPSU terephthalamide fiber (polyarylsulfone (PAS) synthetic fibre fiber), and the application of mica paper.
Background technology
The output of domestic high-temperature resistant grade motor such as high speed motor car High power Traction motor, wind-driven generator, steel mill electric machine, variable-frequency motor etc. is growing; Their employed insulating materials all progressively develop to the direction of higher temperature resistant grade, higher hot mechanical strength; The silicone based solvent-free impregnating resin of a large amount of uses of the at present domestic motor of heatproof index more than 200 grades; Its viscosity big (under the room temperature more than the 500mPa.s) must the heating dipping, though electrical machine insulation thinner thickness (one is below 2mm); But if resin temperature is not enough; Viscosity is still bigger than normal, has the not full possibility of insulation impregnating, has certain risk so " the vacuum pressure mass-impregnation is a VPI technology " is applied on the high-temperature resistant grade motor.
At high-rating generator insulation manufacture view, because electric pressure is very high, (electric pressure of 1000MW ultra supercritical steam turbine generator is 27kV so major insulation thickness is very thick; Major insulation thickness reaches 7.5mm); Application V PI technology is made the major insulation of high-rating generator, and the difficulty of insulating barrier varnished insulation resin is well imagined, although the impregnating resin temperature of using is lower; But can not infinitely reduce viscosity and satisfied soaking into; In the case, the height of the air permeability of low resin mica tape, the dipping complexity of the major insulation that is promptly held by low resin mica tape more becomes the problem that must pay close attention to.In addition; Because the thermal coefficient of expansion of high-rating generator electric conductor and insulating materials is inconsistent; Size is very big again; More importantly be because electric pressure is high, electromagnetic action causes situation such as mechanical stress and flexural vibrations bigger than the slightly little motor influence of build, and it is very outstanding that the hot mechanical performance problems of insulating materials also seems.
Therefore need a kind of mica tape that can reach good dipping saturation degree and the hot mechanical strength in curing back.
Summary of the invention
Technical problem to be solved of the present invention is that a kind of mica paper that gathers benzene sulfone terephthalamide fiber (being commonly called as polyarylsulfone (PAS) synthetic fibre fiber) that contains is provided.
The present invention also provides the manufacturing approach of said mica paper simultaneously.
Another object of the present invention provides the application of mica paper according to the invention.
The present invention solves the problems of the technologies described above through following technical proposal:
A kind of mica paper is made up of fiber and mica powder, and fiber is distributed in the mica layer equably, and the amount of fiber is 2%～50% of mica paper gross mass, and wherein, described fiber is for gathering benzene sulfone terephthalamide fiber.And the amount of fiber can be 2%, 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50% etc.Gather benzene sulfone terephthalamide fiber all is better than the Nomex fiber on heat resistance, dipping property, radiation resistance, high temperature dimensional stability, anti-flammability, chemical stability, have excellent electrical insulation properties simultaneously again.
Described mica powder is non-calcinated type muscovite or calcinated type muscovite, and this mica adopts the slurrying of hydraulic fracture method.
Described fiber has the average length of 0.01～12mm and the average diameter of 0.1～50 μ m.
A kind of manufacturing approach of said mica paper; Described gathering soaked in water, stirs and process fibre stuff benzene sulfone terephthalamide fiber, mix with the mica powder slurry, the amount of fiber is 2%～50% of a mica paper gross mass; In stock tank, stir; With being pumped on the paper machine, on fourdrinier machine, to manufacture paper with pulp, its mica paper of manufacturing paper with pulp quantitatively is controlled at 55g/m
2To 160g/m
2Between.
Described PPSU terephthalamide fiber is by paraphthaloyl chloride and 4; 4` DADPS and 3; The 3` DADPS is for after the main raw material polymerization processes linear fibre-forming polymer; Be dissolved in according to a certain percentage in the solvent, form through wet spinning process and dry-spinning processes then, and have the molecular formula of several kinds of following repeat unit structure characteristics:
A kind of application of said mica paper is used to make high-temperature resistant grade motor-car traction electric machine, wind-driven generator insulation vacuum pressure impregnation and uses mica tape.
The concrete steps of the application of said mica paper are: compound with mica paper after the supporting material coated with adhesive, the mica tape after compound got into baking oven cures dry back rolling, cuts, the one-tenth dish, and obtain mica tape.
Described adhesive is organic siliconresin or epoxy resin, and its adhesive content is 2%～25% of mica tape gross weight, such as being 2%, 5%, 8%, 10%, 13%, 15%, 18%, 20%, 22%, 25% etc.
Described supporting material is an alkali-free glass fiber cloth, and its weight of every square metre is 20g～35g.
The invention has the advantages that:
1. in the fibrous mica paper of the present invention,, increased the mechanical strength of mica paper owing to the existence of PPSU terephthalamide fiber.
2. in the fibrous mica paper of the present invention; The existence of PPSU terephthalamide fiber; Can make to form comparatively loose structure in the mica layer and have certain successional space, can improve the gas permeability of mica tape like this, and help impregnating resin.
3. used heatproof organic fiber in the fibrous mica paper of the present invention; On heat resistance, dipping property, radiation resistance, high temperature dimensional stability, anti-flammability, chemical stability, all be better than the Nomex fiber; Have simultaneously excellent electrical insulation properties again, thus than the Nomex fiber be fit to more use the electrical machine insulation manufacturing with mica tape in.
The specific embodiment
A kind of mica paper; Described mica paper is made up of fiber and mica powder; Described fiber is for gathering benzene sulfone terephthalamide fiber; Gather benzene sulfone terephthalamide fiber is distributed in the mica layer equably, and the amount of fiber is 2%～50% of mica paper gross mass, such as being 2%, 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50% etc.
Described mica powder is non-calcinated type muscovite or calcinated type muscovite, and this mica adopts the slurrying of hydraulic fracture method.
Described fiber has the average length of 0.01～12mm and the average diameter of 0.1～50 μ m.
A kind of manufacturing approach of said mica paper; Described gathering soaked in water, stirs and process fibre stuff benzene sulfone terephthalamide fiber, mix with the mica powder slurry, the amount of fiber is 2%～50% of a mica paper gross mass; In stock tank, stir; With being pumped on the paper machine, on fourdrinier machine, to manufacture paper with pulp, its mica paper of manufacturing paper with pulp quantitatively is controlled at 55g/m
2To 160g/m
2Between.
Described PPSU terephthalamide fiber is by paraphthaloyl chloride and 4; 4` DADPS and 3; The 3` DADPS is for after the main raw material polymerization processes linear fibre-forming polymer; Be dissolved in according to a certain percentage in the solvent, form through wet spinning process and dry-spinning processes then, and have the molecular formula of several kinds of following repeat unit structure characteristics:
A kind of application of said mica paper is used to make high-temperature resistant grade motor-car traction electric machine, wind-driven generator insulation vacuum pressure impregnation and uses mica tape.
Its concrete steps are: compound with the described mica paper of claim 1 after the supporting material coated with adhesive, the mica tape after compound got into baking oven cures dry back rolling, cuts, the one-tenth dish, and obtain mica tape.
Described adhesive is organic siliconresin or epoxy resin, and its adhesive content is 2%～25% of mica tape gross weight, such as being 2%, 5%, 8%, 10%, 13%, 15%, 18%, 20%, 22%, 25% etc.
Described supporting material is an alkali-free glass fiber cloth, and its weight of every square metre is 20g～35g.
Claims (9)
1. mica paper; Described mica paper is made up of fiber and mica powder, it is characterized in that: fiber is distributed in the mica layer equably, and the amount of fiber is 2%～50% of a mica paper gross mass; Wherein, described fiber is for gathering benzene sulfone terephthalamide fiber.
2. mica paper according to claim 1 is characterized in that: described mica powder is non-calcinated type muscovite or calcinated type muscovite, and this mica adopts the slurrying of hydraulic fracture method.
3. mica paper according to claim 1 is characterized in that: described fiber has the average length of 0.01～12mm and the average diameter of 0.1～50 μ m.
4. the manufacturing approach of the said mica paper of one of claim 1 to 3; It is characterized in that: described gathering soaked in water, stirs and process fibre stuff benzene sulfone terephthalamide fiber, mix with the mica powder slurry, the amount of fiber is 2%～50% of a mica paper gross mass; In stock tank, stir; With being pumped on the paper machine, on fourdrinier machine, to manufacture paper with pulp, its mica paper of manufacturing paper with pulp quantitatively is controlled at 55g/m
2To 160g/m
2Between.
5. according to the manufacturing approach of the said mica paper of claim 4; It is characterized in that: described PPSU terephthalamide fiber is with paraphthaloyl chloride and 4,4` DADPS and 3, the linear polymer that the 3` DADPS is processed for the main raw material polymerization; After becoming fiber; Be dissolved in the solvent, form, and have the molecular formula of several kinds of following repeat unit structure characteristics through wet spinning process and dry-spinning processes:
6. application to the said mica paper of one of claim 1 to 3 is characterized in that: be used to make high-temperature resistant grade motor-car traction electric machine, mica tape is used in wind-driven generator insulation vacuum pressure impregnation.
7. according to the application of the said mica paper of claim 6; It is characterized in that: its concrete steps are: compound with the described mica paper of claim 1 after the supporting material coated with adhesive; Mica tape after compound got into baking oven cures dry back rolling, cuts, the one-tenth dish, obtain mica tape.
8. according to the application of the said mica paper of claim 7, it is characterized in that: described adhesive is organic siliconresin or epoxy resin, and its adhesive content is 2%～25% of mica tape gross weight.
9. according to the application of the said mica paper of claim 7, it is characterized in that: described supporting material is an alkali-free glass fiber cloth, and its weight of every square metre is 20g～35g.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102248643A CN102330380A (en) | 2010-07-13 | 2010-07-13 | Mica paper and production method and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102248643A CN102330380A (en) | 2010-07-13 | 2010-07-13 | Mica paper and production method and application thereof |
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| CN102330380A true CN102330380A (en) | 2012-01-25 |
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| CN2010102248643A Pending CN102330380A (en) | 2010-07-13 | 2010-07-13 | Mica paper and production method and application thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102926283A (en) * | 2012-10-26 | 2013-02-13 | 湖北平安电工材料有限公司 | Device and method for making aramid fiber mica paper |
| CN105714593A (en) * | 2014-08-13 | 2016-06-29 | 平江县威派云母绝缘材料有限公司 | Method for preparing composite mica paper |
| CN113631528A (en) * | 2019-03-15 | 2021-11-09 | 杜邦安全与建筑公司 | Paper used as thermal insulation and flame barrier for battery cells |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101748647A (en) * | 2010-02-09 | 2010-06-23 | 陕西科技大学 | Method for regenerating mica paper through reinforcement of aramid precipitated fiber |
| CN101748648A (en) * | 2010-02-09 | 2010-06-23 | 陕西科技大学 | Method for making mica paper by reinforcement of aramid short fiber and chemical pulping |
-
2010
- 2010-07-13 CN CN2010102248643A patent/CN102330380A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101748647A (en) * | 2010-02-09 | 2010-06-23 | 陕西科技大学 | Method for regenerating mica paper through reinforcement of aramid precipitated fiber |
| CN101748648A (en) * | 2010-02-09 | 2010-06-23 | 陕西科技大学 | Method for making mica paper by reinforcement of aramid short fiber and chemical pulping |
Non-Patent Citations (2)
| Title |
|---|
| 宋江超: "芳砜纶纤维的发展和应用", 《国外丝绸》, no. 02, 31 December 2007 (2007-12-31), pages 38 - 40 * |
| 张耀明等: "《玻璃纤维与矿物棉全书》", 31 March 2001, article "云母带", pages: 500-502 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102926283A (en) * | 2012-10-26 | 2013-02-13 | 湖北平安电工材料有限公司 | Device and method for making aramid fiber mica paper |
| CN102926283B (en) * | 2012-10-26 | 2014-07-02 | 湖北平安电工材料有限公司 | Device and method for making aramid fiber mica paper |
| CN105714593A (en) * | 2014-08-13 | 2016-06-29 | 平江县威派云母绝缘材料有限公司 | Method for preparing composite mica paper |
| CN113631528A (en) * | 2019-03-15 | 2021-11-09 | 杜邦安全与建筑公司 | Paper used as thermal insulation and flame barrier for battery cells |
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Application publication date: 20120125 |