WO1997044510A1 - Crin en polyamide aromatique - Google Patents
Crin en polyamide aromatique Download PDFInfo
- Publication number
- WO1997044510A1 WO1997044510A1 PCT/JP1997/001688 JP9701688W WO9744510A1 WO 1997044510 A1 WO1997044510 A1 WO 1997044510A1 JP 9701688 W JP9701688 W JP 9701688W WO 9744510 A1 WO9744510 A1 WO 9744510A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- bristle
- aromatic polyamide
- bristles
- flatness
- less
- 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.)
- Ceased
Links
Classifications
-
- 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
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
- D01F6/60—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyamides
- D01F6/605—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyamides from aromatic polyamides
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
- Y10T428/2933—Coated or with bond, impregnation or core
- Y10T428/2964—Artificial fiber or filament
- Y10T428/2967—Synthetic resin or polymer
- Y10T428/2969—Polyamide, polyimide or polyester
Definitions
- the present invention relates to aromatic polyamide bristles. More specifically, the present invention is lightweight, has high strength and high elasticity, and has excellent chemical resistance, and can be widely used in general industrial fields such as tension members, tex and catheters. This is related to aromatic aromatic bristles. Background art
- Nylon bristles and polyester bristles are widely used for polishing brushes and tees due to their rigidity and abrasion resistance. Also, for use in polishing brushes, which require strict heat resistance and abrasion resistance, female aromatic polyamide bristles are used. However, these bristles have insufficient mechanical properties such as strength and elastic modulus.
- para-type aromatic polyamide bristles have excellent mechanical properties, such as high strength, high elasticity, and high rigidity, and are used to reinforce rubber products such as tires and plastic products. It is expected to be used in industrial materials and recreational applications.
- the conventional para-type aromatic polyamide bristle is a polyparaphenylene terrephthalamide bristle obtained by wet-filing an optically anisotropic solution. No. 4,500,394), which is excellent in rigidity, mechanical properties, heat resistance, etc., but has insufficient chemical resistance to acids and alkaline metals. There is.
- Japanese Patent Application Laid-Open No. 5-166310 proposes a thick denier fiber composed of para-type aromatic polyamide.
- the object of the present invention is to provide a rope, a hoe using a high twist number cord. This is to improve the utilization rate of twisted yarn in order to expand into the industrial fields such as fiber and belt, and to flatten the cross-sectional shape of the fiber to reduce the secondary moment of cross-section and torsion during twisting. This facilitates deformation.
- thick denier fibers having a single fiber fineness of 10 denier or more have only been proposed to have an extremely large flatness, and such fibers have insufficient rigidity and are easily deformed by external force. , Bristle is something that can hardly be said. Disclosure of the invention
- An object of the present invention is to provide a para-type aromatic polyamide having excellent mechanical properties such as high rigidity, high strength and high elastic modulus, and good heat resistance, and also excellent in chemical resistance. To provide bristles.
- optical paraffins such as propylene paraphenylene 3,4,1 year old xydiphenylene 'terephthalamide fiber. Since fibers obtained by wet spinning of an isotropic solution need to be drawn at a high magnification after spinning, in order to obtain bristles with a single fiber fineness of 10 denier or more, the single fiber fineness of undrawn yarn is used. It is necessary to make the bristles excellent in mechanical properties such as strength and elastic modulus due to insufficient or non-uniform solvent removal during spinning.
- the aromatic polyamide bristle of the present invention capable of achieving the above object is formed from an optically isotropic solution, has a single fiber fineness of 10 to 200 denier, and a flatness of 3 or less. Tensile strength of 15 g Zde or more, elongation at break of 4.0% or less, and mechanical properties. And an initial modulus of 500 gde or more.
- the aromatic polyamide which forms bristles according to the present invention comprises at least 80 mol%, preferably at least 90 mol%, of the repeating unit represented by the following formula: A amide or aromatic polyamide that forms an optically isotropic solution 0
- X is the following divalent group:
- 15 to 80 mol% of the repeating unit preferably 20 to 60 mol%, and 85 to 20 mol% of 4,4'-oxodiene terephthalamide,
- copolyamide which is a paraphenylene terephthalamide with a power of 80 to 40 mol%, is particularly preferred because the resulting bristle has particularly good resistance to acids and alkalis.
- the degree of polymerization of the aromatic polymer need not be particularly limited. If the polymer can be dissolved in a solvent to form an optically isotropic dope, the moldability can be improved. It is preferable that the degree of polymerization be as large as possible without impairing it.
- the polymer may contain an ultraviolet absorber, an inorganic / organic pigment, and other additives.
- the bristles of the present invention are obtained by dissolving the above aromatic polyamide in an organic solvent, first forming an optically isotropic dope, and wet-spinning and stretching the dope.
- the detailed reason for the bristles obtained from an optically anisotropic dope is unknown, but it is presumed that the fine structure of the fibers is not dense, and the chemical resistance is insufficient. Cannot achieve the stated purpose.
- the dope was obtained separately as it was with the organic solvent dope after solution polymerization.
- An aromatic polyamide may be dissolved in an organic solvent.
- a known non-protonic organic polar solvent may be used as a polymerization solvent or an organic re-dissolving solvent.
- an inorganic salt is used as a dissolution aid to improve the solubility of the polymer.
- An appropriate amount can be added.
- examples of such an inorganic salt include lithium chloride and calcium chloride.
- methyl tri-n-butylammonium chloride, methyl-tri-n-propylammonium chloride, tetra-n-propyl ammonium chloride, tetra-n-butyl Quaternary ammonium salts such as ammonium chloride can also be used.
- the bristles of the present invention obtained by wet spinning the isotropic dope comprising the aromatic polyamide described above have a flatness of 3 or less, preferably 2 or less, particularly preferably 1 or less in the fiber cross section. Must be 5 or less.
- the flatness is the ratio (a / b) between the longest axis (a) and the shortest axis (b) orthogonal to the cross section perpendicular to the fiber axis.
- the shape of the fiber cross section may be not only when the surface is smooth but also when the surface has irregularities. When the flatness exceeds 3, the secondary moment of the cross section decreases, and it is easily deformed. Therefore, the rigidity is insufficient and the bristle is unsuitable.
- the single fiber fineness of the bristles of the present invention needs to be in the range of 10 to 200 denier, preferably 20 to 100 denier. If the single fiber fineness is less than 10 denier, the rigidity is insufficient. As a result, it is no longer possible to satisfy the shape retention required for bristles. On the other hand, if it exceeds 200 denier, the coagulability during wet spinning is reduced, and it is likely to be non-uniform. Not good because it is enough.
- the bristle of the present invention has a tensile strength of 15 gde or more, preferably 20 to 30 gde. The higher the tensile strength, the better, but if the bristle single fiber fineness is increased, the strength generally tends to decrease, and if it is less than 15 g Zde, the aromatic polyamid as a high-strength fiber The bristle characteristics are lost.
- the bristle of the present invention has an elongation at break of 4.0% or less, and preferably 2.5 to 3.5%. If the elongation at break exceeds 4.0%, there is a problem that the elongation is too large when used as a tension member.
- the initial modulus is more than 500 g Z de, especially 600 to 100 g no de. If the initial modulus is less than 500 g / de, the characteristics as a high elasticity fiber are lost.
- the aromatic polyamide bristles of the present invention are produced by wet spinning and drawing the above-mentioned optically isotropic dope.
- the dope may be discharged directly into the coagulation bath or an air gap may be provided.
- the latter method spininning: dry jet
- Spinning is preferred because bristles with excellent mechanical properties can be easily obtained.
- the solvent of the aromatic polyamide dope is uniformly discharged into the coagulation bath in the above wet spinning method. It is important that they are solidified uniformly. Therefore, in the present invention, doping concentration, doping temperature, coagulation bath temperature, coagulation bath concentration (good solvent concentration: The solidification rate is adjusted so that there is no defect in the aromatic polyamide bristles by selectively combining the solidification rate with the addition of a good solvent) and the immersion time in the coagulation bath.
- the polymer is, for example, polyparaphenylene-3,4, -oxydiphenylene-terephthalamide
- the degree of vagueness is 5 to 8%
- the temperature is 80 to 120, and preferably the concentration is 5. 5 to 6.5%, temperature 100 to 120.
- Use C dope N-methyl-2-pyrrolidone solution
- a concentration of 10 to 25% preferably a temperature of 70 to 80 ° C, and a concentration of 15 to 20% N-methyl-2-pyrrolidone aqueous solution is used as a coagulation bath.
- An undrawn yarn having good desolvation properties and uniform coagulation can be obtained.
- the obtained undrawn yarn is not sufficiently oriented and crystallized, and is then drawn and heat-treated to be oriented and crystallized.
- the stretching temperature depends on the polymer skeleton of the aromatic polyamide, it is preferably from 300 to 550 ° C, and the stretching ratio is at least 8 times, particularly from 10 to 12 times. Is appropriate.
- NMP N-methyl-2-pyrrolidone
- a polymer solution (hereinafter simply referred to as “dope”) having a polymer concentration of 6% by weight was prepared by filtration with a micron filter.
- Bristles were made using the dope prepared by the polymerization method described above.
- Spinning is a dry jet spinning method.
- the nozzle has a round cross section with a diameter of 0.6 mm, a land length of 0.90 mm, the number of nozzles is 1 hole, and the discharge amount is 7.9 gZ.
- After discharging at a dope temperature of 110 ° C it is coagulated in an aqueous solution with a NMP concentration of 20% by weight at a temperature of 70 ° C, drawn out of a coagulation bath at a spinning speed of 15 m / min, and then washed After that, it was heat-stretched at 350 ° C. to 3.0 times and then at 50 ° C. to 3.5 times at two stages, and then wound at a speed of 20 O mZ, and the single fiber fineness was 20%.
- the physical properties of the bristle were as follows
- Example 2 Bristle having a single fiber fineness of 50.1 denier was obtained in the same manner as in Example 1 except that the discharge amount was set to 19.8 gZ.
- the physical properties of the bristle were as follows.
- a single nozzle was used in the same manner as in Example 1 except that the nozzle was 1.0 mm in diameter, 1.5 mm in land length, the discharge amount was 39.6 gZ, and the NMP aqueous solution concentration was 10% by weight. Bristles with a fiber fineness of 10.8 denier were obtained.
- the physical properties of the bristle were as follows.
- Bristle having a single fiber fineness of 180. 3 denier was obtained in the same manner as in Example 3 except that the discharge amount was 71.3 gZ.
- the physical properties of the bristle were as follows.
- the bristles of Examples 1 to 4 and Comparative Example 1 were measured for their chemical resistance to acid and acid. Table 1 shows the results.
- the acid resistance was indicated by a strong retention rate after immersion in a 20% aqueous sulfuric acid solution at 95 ° C for 100 hours.
- the alkali resistance was expressed as a strong retention rate after immersion in a 100% aqueous sodium hydroxide solution at 95 ° C for 100 hours. Strong retention rate (%)
- the aromatic polyamide bristle of the present invention is a bristle obtained by wet spinning and drawing an isotropic dope, so that it has excellent mechanical properties such as high rigidity, high strength and high elastic modulus, and Compared with the conventional aromatic polyamide bristle, it has excellent chemical resistance with remarkably improved durability against acids and alkalis. Therefore, it can be widely used in fields where these characteristics are required, for example, in fields such as cushion members, tex, and catheters.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Artificial Filaments (AREA)
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/983,138 US6033778A (en) | 1996-05-22 | 1997-05-20 | Aromatic polyamide bristle |
| DE69714954T DE69714954T2 (de) | 1996-05-22 | 1997-05-20 | Borste aus aromatischem polyamid |
| EP97922106A EP0846794B1 (en) | 1996-05-22 | 1997-05-20 | Aromatic polyamide bristle |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08127024A JP3142777B2 (ja) | 1996-05-22 | 1996-05-22 | 芳香族ポリアミド剛毛 |
| JP8/127024 | 1996-05-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1997044510A1 true WO1997044510A1 (fr) | 1997-11-27 |
Family
ID=14949802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP1997/001688 Ceased WO1997044510A1 (fr) | 1996-05-22 | 1997-05-20 | Crin en polyamide aromatique |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6033778A (ja) |
| EP (1) | EP0846794B1 (ja) |
| JP (1) | JP3142777B2 (ja) |
| DE (1) | DE69714954T2 (ja) |
| WO (1) | WO1997044510A1 (ja) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6167486A (en) | 1996-11-18 | 2000-12-26 | Nec Electronics, Inc. | Parallel access virtual channel memory system with cacheable channels |
| US6708254B2 (en) | 1999-11-10 | 2004-03-16 | Nec Electronics America, Inc. | Parallel access virtual channel memory system |
| JP3762960B2 (ja) * | 2002-01-30 | 2006-04-05 | 王子製紙株式会社 | 扁平ポリ−p−フェニレンジフェニルエーテルテレフタラミド繊維の製造方法 |
| US8337968B2 (en) | 2002-09-11 | 2012-12-25 | Boston Scientific Scimed, Inc. | Radiation sterilized medical devices comprising radiation sensitive polymers |
| JP4653612B2 (ja) * | 2005-09-22 | 2011-03-16 | 帝人テクノプロダクツ株式会社 | 耐薬品性が向上されたパラ型芳香族ポリアミド繊維の製造方法 |
| JP5307470B2 (ja) * | 2008-08-07 | 2013-10-02 | 帝人株式会社 | セメント補強用全芳香族ポリアミド繊維、およびその製造方法 |
| CN102898323B (zh) * | 2012-09-28 | 2014-09-10 | 浙江工业大学 | Ab型改性ppta单体及其制备与应用 |
| JP7152261B2 (ja) * | 2018-10-31 | 2022-10-12 | 帝人株式会社 | パラ型全芳香族ポリアミド繊維、およびその製造方法 |
| JP6994779B2 (ja) * | 2019-02-22 | 2022-01-14 | 株式会社きのした | 粒状パフ及びその製造方法 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59144610A (ja) * | 1983-02-04 | 1984-08-18 | Teijin Ltd | 芳香族コポリアミド繊維の製造法 |
| JPH05163610A (ja) * | 1991-12-18 | 1993-06-29 | Teijin Ltd | 芳香族ポリアミド偏平繊維 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5176386A (ja) * | 1974-12-27 | 1976-07-01 | Teijin Ltd | Hokozokuhoriamidonoseizoho |
| AU500143B2 (en) * | 1974-12-27 | 1979-05-10 | Teijin Ltd | Fiber or film-forming copolyamide |
| AU634554B2 (en) * | 1989-06-28 | 1993-02-25 | Michelin Recherche Et Technique S.A. | Aramid monofilament and method for obtaining same |
-
1996
- 1996-05-22 JP JP08127024A patent/JP3142777B2/ja not_active Expired - Lifetime
-
1997
- 1997-05-20 WO PCT/JP1997/001688 patent/WO1997044510A1/ja not_active Ceased
- 1997-05-20 US US08/983,138 patent/US6033778A/en not_active Expired - Lifetime
- 1997-05-20 DE DE69714954T patent/DE69714954T2/de not_active Expired - Lifetime
- 1997-05-20 EP EP97922106A patent/EP0846794B1/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59144610A (ja) * | 1983-02-04 | 1984-08-18 | Teijin Ltd | 芳香族コポリアミド繊維の製造法 |
| JPH05163610A (ja) * | 1991-12-18 | 1993-06-29 | Teijin Ltd | 芳香族ポリアミド偏平繊維 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP0846794A4 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0846794B1 (en) | 2002-08-28 |
| JPH09310223A (ja) | 1997-12-02 |
| EP0846794A1 (en) | 1998-06-10 |
| DE69714954T2 (de) | 2003-04-10 |
| US6033778A (en) | 2000-03-07 |
| EP0846794A4 (en) | 2000-04-19 |
| JP3142777B2 (ja) | 2001-03-07 |
| DE69714954D1 (de) | 2002-10-02 |
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