WO2016190163A1 - Feuille de papier d'aramide et son procédé de production - Google Patents

Feuille de papier d'aramide et son procédé de production Download PDF

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Publication number
WO2016190163A1
WO2016190163A1 PCT/JP2016/064567 JP2016064567W WO2016190163A1 WO 2016190163 A1 WO2016190163 A1 WO 2016190163A1 JP 2016064567 W JP2016064567 W JP 2016064567W WO 2016190163 A1 WO2016190163 A1 WO 2016190163A1
Authority
WO
WIPO (PCT)
Prior art keywords
aramid paper
aramid
paper
fibrid
fibrids
Prior art date
Application number
PCT/JP2016/064567
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English (en)
Japanese (ja)
Inventor
成瀬　新二
竜士 藤森
千尋 近藤
Original Assignee
デュポン帝人アドバンスドペーパー株式会社
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.)
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Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=57392762&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2016190163(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by デュポン帝人アドバンスドペーパー株式会社 filed Critical デュポン帝人アドバンスドペーパー株式会社
Priority to KR1020177029459A priority Critical patent/KR20180012743A/ko
Priority to CN201680031183.0A priority patent/CN107636226A/zh
Priority to CN202310418992.9A priority patent/CN116516718A/zh
Publication of WO2016190163A1 publication Critical patent/WO2016190163A1/fr

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
    • D21H13/10—Organic non-cellulose fibres
    • D21H13/20—Organic non-cellulose fibres from macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H13/26—Polyamides; Polyimides
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/004—Drying webs by contact with heated surfaces or materials
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D21H25/04—Physical treatment, e.g. heating, irradiating

Definitions

  • the present invention relates to an electrically insulating material having high heat resistance. More specifically, the present invention relates to aramid paper that is thin and has high strength.
  • aramid paper is a synthetic paper made of aromatic polyamide and has been used as an electrical insulating material and aircraft honeycomb base due to its excellent heat resistance, flame resistance, electrical insulation, toughness and flexibility.
  • DuPont (USA) Nomex (R) fiber paper comprises mixing poly (metaphenylene isophthalamide) staple fibers and fibrids in water, It is manufactured by calendering the paper mixed with the slurry. This paper is known to still have high strength and toughness and excellent electrical insulation even at high temperatures.
  • insulating materials such as transformers and motors
  • An object of the present invention is to provide a thin heat insulating sheet material having high heat resistance. Another object of the present invention is to provide a method for producing the above electric insulating sheet material.
  • the present invention is an aramid paper formed from a mixture of a fibrid formed from an aromatic polyamide and a short fiber, and the following inequalities (1) and (2) 40 ⁇ [FB] ⁇ 90 (1) [Thickness] / ([Fiber diameter of short fiber] ⁇ 2) ⁇ 1.25 (2) [Wherein [FB] is the fibrid content (% by weight) in the aramid paper] An aramid paper having a satisfying fibrid content and thickness is provided.
  • the present invention includes hot pressing with an aramid paper formed from a mixture of a fibrid formed from an aromatic polyamide and a short fiber between at least a pair of heating elements.
  • the method for producing aramid paper according to the first aspect is provided, wherein the shrinkage rate of the aramid paper after hot pressing with the heating element is 3% or less.
  • the present invention sandwiches an aramid paper formed from a mixture of a fibrid formed from an aromatic polyamide and a short fiber between at least a pair of heating elements, and has a weight of 1000 kg / cm 2 or more.
  • aramid means a linear polymer compound (aromatic polyamide) in which 60% or more of amide bonds are directly bonded to an aromatic ring.
  • aromatic polyamide examples include polymetaphenylene isophthalamide and copolymers thereof, polyparaphenylene terephthalamide and copolymers thereof, poly (paraphenylene) -copoly (3,4 diphenyl ether) terephthalamide, and the like.
  • These aramids are industrially produced by, for example, conventionally known interfacial polymerization methods, solution polymerization methods and the like using isophthalic acid chloride and metaphenylenediamine, and can be obtained as commercial products. Is not to be done.
  • polymetaphenylene isophthalamide is preferably used in that it has characteristics such as good moldability, thermal adhesiveness, flame retardancy, and heat resistance.
  • aramid fibrids are film-form aramid particles having paper-making properties and are also called aramid pulp (see Japanese Patent Publication No. 35-11851, Japanese Patent Publication No. 37-5732, etc.).
  • Aramid fibrids are widely known to be used as a papermaking raw material after being disaggregated and beaten in the same manner as ordinary wood pulp, and can be subjected to so-called beating treatment for the purpose of maintaining quality suitable for papermaking. This beating process can be performed by a disk refiner, a beater, or other papermaking raw material processing equipment that exerts a mechanical cutting action.
  • the shape change of the fibrid can be monitored by the freeness test method stipulated in Japanese Industrial Standard P8121.
  • the freeness of the aramid fibrid after the beating treatment is preferably in the range of 10 to 300 cm 3 (Canadian Standard Freeness).
  • the strength of the multi-thermal electrical insulation sheet material formed therefrom may be reduced.
  • the utilization efficiency of the mechanical power to be input becomes small, the processing amount per unit time is often reduced, and further refinement of the fibrid is reduced. Since it proceeds too much, the so-called binder function is likely to deteriorate.
  • the aramid fibrid has excellent properties as a binder, so it can efficiently supplement fine particles and other additive components, and at the same time the raw material yield is improved in the production of the aramid paper of the present invention. It is possible to reduce the number of through-holes in layers in the sheet, and the electrical insulation is improved.
  • an aramid short fiber is obtained by cutting a fiber made of aramid.
  • aramid registered trademark
  • examples of such a fiber include “Teijin Conex (registered trademark)” by Teijin Limited, “ Although what can be obtained by brand names, such as "NOMEX (trademark)", is mentioned, It is not limited to these.
  • the length of the aramid short fibers can be selected from the range of generally 1 mm or more and less than 50 mm, preferably 2 to 10 mm. If the length of the short fiber is less than 1 mm, the mechanical properties of the sheet material are deteriorated.
  • the fiber diameter of the aramid short fibers can be selected from the range of preferably 0.1 to 25 ⁇ m, more preferably 1 to 20 ⁇ m.
  • the aramid paper is a sheet-like material mainly composed of the aramid fibrid and the aramid short fibers, and the following inequalities (1) and (2) 40 ⁇ [FB] ⁇ 90 (1) [Thickness] / ([Fiber diameter of short fiber] ⁇ 2) ⁇ 1.25 (2) [Wherein [FB] is the fibrid content (% by weight) in the aramid paper) And satisfying the fibrid content and thickness.
  • the aramid paper has a more porous structure and tends to cause a problem in electrical insulation.
  • Aramid paper is generally produced by a method of mixing the above-mentioned aramid fibrid and aramid short fibers and then forming a sheet.
  • a method of forming a sheet using an air flow after dry blending the aramid fibrid and the aramid short fiber, a method of forming a sheet using an air flow, after the aramid fibrid and the aramid short fiber are dispersed and mixed in a liquid medium, the liquid permeation is performed.
  • a so-called wet papermaking method using water as a medium is preferably selected.
  • a single or mixed aqueous slurry containing at least aramid fibrids and short aramid fibers is fed to a paper machine and dispersed, and then dewatered, squeezed and dried to be wound up as a sheet. The method is common.
  • a long paper machine a circular paper machine, an inclined paper machine, and a combination paper machine combining these are used.
  • a composite sheet composed of a plurality of paper layers can be obtained by forming and combining slurry having different blending ratios.
  • Additives such as a dispersibility improver, an antifoaming agent, and a paper strength enhancer are used as necessary during papermaking.
  • Aramid paper generally has a basis weight in the range of 5 to 1000 g / m 2 , preferably 15 to 200 g / m 2 .
  • the tensile strength of the aramid paper is preferably in the range of 0.5 kgf / 15 mm or more, more preferably 1 kgf / 15 mm or more.
  • the air permeability of the aramid paper is preferably in the range of 3000 seconds or more, more preferably 4000 seconds or more.
  • the aramid paper obtained as described above is known to be improved in density, crystallinity, heat resistance, dimensional stability, and mechanical strength by hot pressing at a high temperature and high pressure between a pair of heating elements. ing.
  • the heat pressure condition is preferably such that the shrinkage rate of the aramid paper after being hot-pressed between the heating elements is 3% or less. When the shrinkage rate exceeds 3%, it becomes difficult to have a thickness in the range of the above formula (2) due to an increase in thickness due to shrinkage.
  • the shrinkage rate is more preferably 2% or less, and further preferably 1.5% or less.
  • the aramid paper is sandwiched between at least a pair of heating elements and a pressure of 1000 kg / cm 2 or more is applied.
  • the amount of heat Q (J / m 2 ) expressed by the following is supplied per unit area of the aramid paper, the shrinkage rate is suppressed to within 3%, and the short fiber itself is deformed by sufficient heat pressure, and the thinner sheet Fabrication is possible.
  • the basis weight of the aramid paper is 20 g / m 2
  • the specific heat is 1.89 J / g / K
  • the glass transition temperature is 275 ° C.
  • the temperature before being sandwiched between metal rolls is 20 ° C.
  • the surface temperature is 100 to 275 ° C.
  • the linear heat pressure is 100 kg / cm or more.
  • / M 2 or more can be exemplified, but is not limited thereto.
  • the above hot pressing can be performed a plurality of times in an arbitrary order.
  • the glass transition temperature is determined by raising the temperature of the test piece from room temperature at a rate of 3 ° C./min, measuring the calorific value with a differential scanning calorimeter, and drawing two extension lines on the endothermic curve. The value obtained from the intersection of the 1/2 straight line and the endothermic curve between them, and the glass transition temperature of the aramid paper used in the examples was 275 ° C.
  • a polymetaphenylene isophthalamide fibrid was manufactured using a pulp particle manufacturing apparatus (wet precipitator) composed of a combination of a stator and a rotor described in JP-A-52-15621. This was treated with a disaggregator and a beater to adjust the length weighted average fiber length to 0.9 mm (freeness of aramid fibrid: 100 ml (Canadian Freeness)).
  • aramid short fiber Nomex (registered trademark), single yarn fineness 2 denier, fiber diameter 15 ⁇ m
  • Examples 1 to 4 (Manufacture of aramid paper) Aramid fibrids and aramid short fibers prepared as described above were each dispersed in water to prepare a slurry. These slurries are mixed so that the aramid fibrids and aramid short fibers have the blending ratios (weight ratios) shown in Table 1, and a sheet-like material is produced with a tappy hand machine (cross-sectional area of 625 cm 2 ). did.
  • a metal calender roll the outer peripheral length where the roll and the aramid paper contact each other is adjusted to 1 mm and subjected to hot pressing under the calender conditions shown in Table 1 (the aramid paper before being sandwiched between the heating elements). The temperature is 20 ° C.) to obtain an aramid paper. Table 1 shows the main characteristic values of the aramid paper thus obtained.
  • the thickness is expressed by the following formula (2) [Thickness] / ([Fiber diameter of short fiber] ⁇ 2) ⁇ 1.25 (2) It is thin enough to meet the requirements, and it uses high aramid material with high strength, high air permeability, and essentially high heat resistance, so it can be used as an insulating material for transformers, motors, etc. Useful.
  • the outer peripheral length where the roll and the aramid paper contact each other is adjusted to 1 mm and subjected to hot pressing under the calender conditions shown in Table 2 (the aramid paper before being sandwiched between the heating elements).
  • the temperature is 20 ° C.) to obtain an aramid paper.
  • Table 2 shows the main characteristic values of the aramid paper thus obtained.
  • the aramid paper of Comparative Examples 1 to 3 has a low air permeability. Furthermore, the aramid paper of Comparative Example 1 has a low strength, and the aramid papers of Comparative Examples 2 and 3 have a large shrinkage due to high shrinkage. It seems difficult to cope with the change.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Paper (AREA)
  • Organic Insulating Materials (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne une feuille de papier d'aramide qui est formée à partir d'un mélange de fibres courtes et de fibrides formées à partir d'un polyamide aromatique, et qui présente une teneur en fibrides et une épaisseur satisfaisant les expressions d'inégalité (1) et (2). 40 ≤ (FB) ≤ 90 (1) (Épaisseur)/((Diamètre de fibres courtes) × 2) ≤ 1,25 (2) (Dans les formules, (FB) représente la teneur (% en poids) des fibrides dans la feuille de papier d'aramide.)
PCT/JP2016/064567 2015-05-28 2016-05-17 Feuille de papier d'aramide et son procédé de production WO2016190163A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR1020177029459A KR20180012743A (ko) 2015-05-28 2016-05-17 아라미드지 및 그의 제조 방법
CN201680031183.0A CN107636226A (zh) 2015-05-28 2016-05-17 芳纶纸及其制备方法
CN202310418992.9A CN116516718A (zh) 2015-05-28 2016-05-17 芳纶纸及其制备方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015108455A JP6649701B2 (ja) 2015-05-28 2015-05-28 アラミド紙、及びその製造方法
JP2015-108455 2015-05-28

Publications (1)

Publication Number Publication Date
WO2016190163A1 true WO2016190163A1 (fr) 2016-12-01

Family

ID=57392762

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2016/064567 WO2016190163A1 (fr) 2015-05-28 2016-05-17 Feuille de papier d'aramide et son procédé de production

Country Status (5)

Country Link
JP (1) JP6649701B2 (fr)
KR (1) KR20180012743A (fr)
CN (2) CN107636226A (fr)
TW (1) TWI702326B (fr)
WO (1) WO2016190163A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018188778A1 (fr) * 2017-04-12 2018-10-18 Diehl Aviation Laupheim Gmbh Papier ainsi que structure en nid d'abeilles fabriquée à partir dudit papier
WO2020170902A1 (fr) * 2019-02-22 2020-08-27 デュポン帝人アドバンスドペーパー株式会社 Procédé de production de papier aramide
US20220184538A1 (en) * 2019-04-05 2022-06-16 Ahlstrom-Munksjö Oyj Flue gas filtration media

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115897292A (zh) * 2022-10-28 2023-04-04 株洲时代华先材料科技有限公司 一种芳纶皱纹纸及其制备方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0369692A (ja) * 1989-05-26 1991-03-26 E I Du Pont De Nemours & Co 薄い、樹脂飽和性芳香族ポリアミド紙及びその製造方法
JPH09139113A (ja) * 1995-11-13 1997-05-27 Mishima Seishi Kk 耐熱紙
JP2007308836A (ja) * 2006-05-19 2007-11-29 Teijin Techno Products Ltd 耐熱性電絶紙
US20110174452A1 (en) * 2008-07-22 2011-07-21 Peizhi Heng Base paper of aramid fiber honeycomb core and manufacturing method thereof
JP2011233482A (ja) * 2010-04-30 2011-11-17 Du pont teijin advanced paper co ltd 非水系電気電子部品用薄葉材
JP2011258462A (ja) * 2010-06-10 2011-12-22 Du pont teijin advanced paper co ltd 非水系電気電子部品用薄葉材
WO2015032678A1 (fr) * 2013-09-06 2015-03-12 Teijin Aramid B.V. Papier de séparation pour cellules électrochimiques

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5910231A (en) * 1997-07-22 1999-06-08 E. I. Du Pont De Nemours And Company Aramid papers of improved solvent resistance and dimensionally stable laminates made therefrom
WO2002012619A1 (fr) * 2000-08-04 2002-02-14 Teijin Limited Papier fibreux thermoresistant
CN100494565C (zh) * 2005-02-05 2009-06-03 浙江凯恩特种材料股份有限公司 一种芳纶纸及其制备方法
JP5723199B2 (ja) * 2011-04-07 2015-05-27 デュポン帝人アドバンスドペーパー株式会社 導電性アラミド紙及びその製造方法

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0369692A (ja) * 1989-05-26 1991-03-26 E I Du Pont De Nemours & Co 薄い、樹脂飽和性芳香族ポリアミド紙及びその製造方法
JPH09139113A (ja) * 1995-11-13 1997-05-27 Mishima Seishi Kk 耐熱紙
JP2007308836A (ja) * 2006-05-19 2007-11-29 Teijin Techno Products Ltd 耐熱性電絶紙
US20110174452A1 (en) * 2008-07-22 2011-07-21 Peizhi Heng Base paper of aramid fiber honeycomb core and manufacturing method thereof
JP2011233482A (ja) * 2010-04-30 2011-11-17 Du pont teijin advanced paper co ltd 非水系電気電子部品用薄葉材
JP2011258462A (ja) * 2010-06-10 2011-12-22 Du pont teijin advanced paper co ltd 非水系電気電子部品用薄葉材
WO2015032678A1 (fr) * 2013-09-06 2015-03-12 Teijin Aramid B.V. Papier de séparation pour cellules électrochimiques

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018188778A1 (fr) * 2017-04-12 2018-10-18 Diehl Aviation Laupheim Gmbh Papier ainsi que structure en nid d'abeilles fabriquée à partir dudit papier
CN110475930A (zh) * 2017-04-12 2019-11-19 代傲航空(劳普海姆)有限公司 纸以及由其制备的蜂窝结构
WO2020170902A1 (fr) * 2019-02-22 2020-08-27 デュポン帝人アドバンスドペーパー株式会社 Procédé de production de papier aramide
JP2020133066A (ja) * 2019-02-22 2020-08-31 デュポン帝人アドバンスドペーパー株式会社 アラミド紙の製造方法
JP7183073B2 (ja) 2019-02-22 2022-12-05 デュポン帝人アドバンスドペーパー株式会社 アラミド紙の製造方法
US20220184538A1 (en) * 2019-04-05 2022-06-16 Ahlstrom-Munksjö Oyj Flue gas filtration media

Also Published As

Publication number Publication date
TWI702326B (zh) 2020-08-21
CN116516718A (zh) 2023-08-01
JP2016223021A (ja) 2016-12-28
JP6649701B2 (ja) 2020-02-19
KR20180012743A (ko) 2018-02-06
CN107636226A (zh) 2018-01-26
TW201704591A (zh) 2017-02-01

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