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Hygroscopic polyesters for Textile Fabrics

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This Report helps you to develop Hygroscopic Polyesters and also provided few patented technologies

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Hygroscopic polyesters for Textile Fabrics

  1. 1. 22.12.2014 Hygroscopic polyesters PET is hygroscopic polyester, meaning that when it exposed to humid atmospheres, it will absorb the moisture. We can obtain hygroscopicity for PET by using the following Co-monomers 1. Polyethylene glycol (PEG) MW: 6000 to 20000 (up to 50 wt%) 2. Aromatic dicarboxylic acid having a metal sulfonate group (SIPA & DMSIP) 3. DEG 4. Silica-based inorganic particles 5. Graft polymerizing Acrylic polymers or meth-acrylic acid to polyester fiber 6. Cellulose acetate 7. Application of Hygroscopic polyestercopolymer Suitable for underwear, shirts, blouses, intermediate wear, sportswear, slacks, outer wear, interlinings, curtains, wall paper, and furthermore, bed sheets, bedquilt covers, fillings, etc. Test procedures Test method for Degree of hygroscopic swelling A polyester copolymer chip was dried in a vacuum at 130° C. for 12 hours, accurately weighed, and put into a container filled with water. After 24 hours, the chip with water absorbed was weighed, and the ratio of the chip weight after water absorption to the chip weight before Water absorption was obtained from the following formula as the degree of hygroscopic swelling. Degree of hygroscopic swelling=Chip weight after water absorption/Chip weight before water absorption Determine the Moisture absorption and release parameter (ΔMR) of polyester copolymeror fiber using it In the case of a polymer, 1 g of a chip was cut into an about 2 mm cube to make a sample, and in the case of a yarn, 1 to 3 g of a raw yarn or cloth was used as a sample. The absolute dry weight of the sample was measured. The sample was allowed to stand in a thermo-hygrostat (PR-2G produced by Tabai) at 20° C. and 65% RH or at 30. degree. C. and 90% RH for 24 hours, and weighed. The coefficient of moisture absorption was obtained from the following formula: Coefficient of moisture absorption (%) = (Weight after moisture absorption-Absolutely dry weight)/Absolutely dry weight×100 From the coefficient of moisture absorption measured after treatment at 20° C. and 65% RH and that at 30° C. and 90% RH (respectively expressed as MR1 and MR2), the moisture absorption coefficient difference ΔMR (%)=MR2-MR1 was obtained. If the polyester copolymer is higher in ΔMR, the hygroscopicity of the yarn can be more efficiently enhanced preferably. So, the following criterion was used:
  2. 2. ΔMR≧18 . . . Good 12≦ΔMR < 18 . . . ok ΔMR < 12 . . . Foor Relevant Patents: JP2006104379A TEIJIN FIBERS LTD 2006-04-20 C08L 67/00 Title: POLYESTER COMPOSITION, ITS PREPARATION METHOD AND POLYESTER MOLDED PRODUCT AND HYGROSCOPIC POLYESTER FIBER MADE OF THE SAME Abstract: PROBLEMTO BE SOLVED: To provide a polyester composition excellent in color hue, and a hygroscopic fiber and a molded product made of the same. SOLUTION: The polyester composition comprises an aromatic polyester copolymer as the main constituent and contains 0.1-10 mass ppm orthochromatic agent, wherein the aromatic polyester copolymer comprises ethylene glycol or tetramethylene glycol as a main glycol component and is obtained through copolymerization of polyethylene glycol and/or its derivative. In the polyester composition, the color a* value and the color b* value in an L*a*b* color systemfall within the range of -9 to 0 and -8 to 6, respectively, after a heat-treatment conducted at 130°C for 2 hr, the maximum absorption wavelength in the visible absorption spectrum falls within the range of 540-600 nm, and relations (1)-(4): [wherein A400, A500, A600 and A700 are the absorbance at 400nm, 500nm, 600nm and 700nm, respectively, in the visible absorption spectrum; and Amax is the absorbance at the maximum absorption wavelength in the visible absorption spectrum] are satisfied. US5698331A TORAY INDUSTRIES 1997-12-16 C08G 63/668 Title: Hygroscopic polyester copolymer, and a hygroscopic fiber made therefrom Abstract: The present specification discloses a hygroscopic polyester copolymer with a hydrophilic compound copolymerized, containing a cross-linking agent and controlled in moisture absorbing and releasing property, and a fiber using the polyester copolymer. The fiber can be used as a comfortable material for underwear, sports wear, interlinings, etc. as highly hygroscopic woven and knitted fabrics, etc. of high quality JP62267352A ASAHI CHEMICAL IND 1987-11-20 Title: HYGROSCOPIC POLYESTER COMPOSITION
  3. 3. Abstract: PURPOSE: To obtain a novel polyester composition of high hygroscopicity, suitable for sports wears, beddings, towels, etc., by incorporating, during the polyester production process, that is, prior to the forming, a specified proportion of a polyalkylne glycol of specific mol.wt. CONSTITUTION: The objective composition, that is, a modified polyester can be obtained by incorporating (A) 50 to 70 (pref. 55 to 65)wt % of a polyalkylene glycol with a number-average mol.wt. =6,000 (pref. 6,000 to 20,000) (e.g. a block copolymer from polyethylene glycol and polypropylene glycol, a random copolymer from ethylene oxide and propylene oxide) during the esterification or polymerization, or at the completion of the ester interchange, for a polyester containing, in the recurring units, ethylene terephthalate chain or butylene terephthalate chain. JP2002363824A TORAY INDUSTRIES 2002-12-18; C08K 3/36 Title: POLYESTER FIBER HAVING EXCELLENT HYGROSCOPICITY Abstract: PROBLEMTO BE SOLVED: To obtain a polyester fiber having an excellent productivity and high hygroscopicity, and capable of providing a woven or knitted product or the like usable as a comfortable material such as an underwear, a sport wear and a lining. SOLUTION: This polyester fiber having the excellent hygroscopicity and productivity contains both of silica-based inorganic particles and inorganic particles having surface potentials opposing to those of the silica-based particles JP2221413A TEIJIN LTD 1990-09-04 Title: HYGROSCOPIC POLYESTER FIBER Abstract: PURPOSE: To obtain the subject fiber having permanent hygroscopicity and unique feeling by dispersing and mixing a specified amount of cellulose acetate in a terephthalic acid- based polyester. CONSTITUTION: In a polyester (e.g. polyethylene terephthalate or polybutylene terephthalate) containing terephthalic acid as the main acid component, 1-30 weight percent, preferably 10-15 weight percent cellulose acetate (preferably 52-63 percent degree of acetylation) is dispersed and mixed to obtain the objective fiber. JP4361616A Toray Ind. 1992-12-15 Title: CORE-SHEATH TYPE CONJUGATE FIBER EXCELLENT IN HYGROSCOPICITY
  4. 4. Abstract: PURPOSE: To obtain the subject fiber, useful as inners, sportswears, etc., and excellent in high-level processability by using a specific thermoplastic resin as a core part and a fiber-forming polyester resin as a sheath part and specifying the ratio of the core part. CONSTITUTION: The objective fiber is obtained by using (A) a thermoplastic resin of a polyether ester resin (preferably a block copolymer prepared by polycondensing a polyamide-forming component composed of caprolactam, etc., adipic acid, etc., and a polyether ester-forming component compose of polyethylene glycol) as a core part and (B) a fiber-forming polyester resin such as polyethylene terephthalate as a sheath part. The ratio of the core part is 5-30wt.% based on the whole weight of the conjugate fiber. JP2002053743A TORAY INDUSTRIES 2002-02-19; C08L 67/02 Title: HYGROSCOPIC POLYESTER COMPOSITION, SYNTHETIC FIBER USING THIS COMPOSITION, AND PREPARATIVE PROCESS THEREOF Abstract: PROBLEMTO BE SOLVED: To provide a hygroscopic polyester composition particularly suitable for synthetic fibers which is comfortable to wear because of the excellent hygroscopicity. SOLUTION: The hygroscopic polyester composition comprises 80-99 wt.% of (A) a polyalkylene terephthalate-based polyester which is copolymerized with 1-10 mole% of an aromatic dicarboxylic acid having a metal sulfonate group, and 1-20 wt.% of (B) a hygroscopic viscosity- reducing agent which has a melt viscosity at 280°C and 1000 sec-1 of 20-2, 000 poise and a hygroscopic parameter (ΔMR) of 10-100% JP9241925A Nippon Ester Co Ltd 1997-09-16 Title: HYGROSCOPIC POLYESTER FIBER Abstract: Source: JP9241925A [EN] PROBLEMTO BE SOLVED: To obtain a hygroscopic polyester fiber, producible with good yarn manufacturing properties and having excellent hygroscopicity and light resistance. SOLUTION: This hygroscopic polyester fiber comprises a polyester, containing 3-50wt.% polyalkylene glycol having 2000-20000 average molecular weight in a polyalkylene terephthalate, cerium oxide and talc or cesium oxide and silica and further 0.05- 10wt.% particles having the surface coated with amorphous silica and 0.1-3.0μm average particle diameter therein
  5. 5. JP6123011A ASAHI CHEMICAL IND 1994-05-06: C08G 63/672 Title: HYGROSCOPIC POLYESTER FIBER Abstract: PURPOSE: To obtain the subject fiber containing a three-dimensional random copolymer component and a block polyetherester component in specified amounts, respectively, further containing metal ions, and excellent in washing resistance, hygroscopicity and heat resistance. CONSTITUTION: The objective fiber contains (A) a three-dimensional random copolymer component composed from (i) alkylene terephthalate units of formula I (R1 is 2-4C alkylene), (ii) alkylene sulfoisophthalate units of formula II (M is metal ion), and (iii) polyoxyalkylene glycol units each having an average mol.wt. of 300-20000 and (B) a blocked polyetherester component of formula III (R2 is the same as R1 (a) is 3-100; (b) is 1-10) so as to satisfy conditions comprising: component (i) (wt.%) ≥60 and 1≤, component (ii) ≤10 and 0.2≤, component (iii)/component (ii) ≤5.0 and 0.5≤, component B/component (ii) ≤4.0. The M having a value of ≥1.5 is contained as the metal salts of the compounds of formula II and III in an amount of 0.1g/kg of the weight of the fiber. The value is obtained by dividing the charge number of the metal ion by the radius (Å) of the metal ion JP3179024A KURARAY CO 1991-08-05D01F 6/86 Title: COPOLYESTER, DIOL COMPOUND USED THEREFOR AND FIBER COMPRISING SAME Abstract: PURPOSE: To provide a copolyester which can give a high-strength fiber having high surface wettability, hygroscopicity, etc., by constituting it from aromatic dicarboxylic acid units, alkylene glycol units and a specified amount of polyoxyalkylene side chain-containing diol compound units. CONSTITUTION: Aromatic dicarboxylic acid units (e.g. terephthalic acid units), alkylene glycol units (e.g. ethylene glycol units) and polyoxyalkylene side chain- containing diol compound units of formula I [wherein R1 and R4 are each a hydrocarbon group which may be substituted; R2 and R5 are each 2-4 C alkylene; R3 is H or a hydrocarbon group; Y1 and Y2 are each an organic group; m1 and m2 are each 1, 2 or 3; and (a1×m1)+(a2×m2) is 12-500] (e.g. formula II) in an amount to give the content of units of formula I of 1-60wt.% to produce a copolyester of an intrinsic viscosity of 0.4-1.5dl/g CN102220657A CHINESE TEXTILE ACADEMY 2011-10-19
  6. 6. D01F 6/92 Title: Hygroscopic polyester staple fiber and preparation method thereof Abstract: The invention relates to a hygroscopic polyester staple fiber and a preparation method thereof. The hygroscopic polyester staple fiber is obtained by the steps of beating and blending of inorganic powder and polyester monomers, polycondensation reaction, spinning and post-treatment. The polyester monomers are terephthalic acid, binary fatty alcohol and poly binary fatty alcohol. With a fiber number ranging from 0.89-1.33dtex, the fiber obtained has good hygroscopicity and pilling resisting performance JP2001234433A NIPPON ESTER CO LTD 2001-08-31 D01F 8/14 Title: HYGROSCOPIC POLYESTER FIBER Abstract: PROBLEMTO BE SOLVED: To provide a hygroscopic polyester fiber excellent in hygroscopic performance and also possessing practical strength, and capable of exhibiting a soft feeling by being subjected to caustic reduction treatment. SOLUTION: This hygroscopic polyester fiber is a conjugated fiber made of two components A and B both composed mainly of polyethylene terephthalate. The component A substantially comprises a polyethylene terephthalate composed of ≥90% of ethylene terephthalate repeating unit, the component B comprises a specific compound, and the weight ratio of the component A to the component B is (10/90) to (60/40). The component B is exposed on the surface of the fiber in a proportion of ≥15% of the surface area of the fiber. The component B is polyethylene glycol, molecular weight is over 18,000 JP9157956A Nippon ester co Ltd 2004-10-06 Title: HYGROSCOPIC POLYESTER CONJUGATE FIBER Abstract: Source: PROBLEMTO BE SOLVED: To obtain a hygroscopic polyester hollow conjugate fiber not causing sheath cracking in alkali weight-loss treatment and a dyeing process, by arranging polyesters different in moisture absorption at a core part and a sheath part and subjecting to conjugate spinning. SOLUTION: This hygroscopic polyester conjugate fiber comprises a core component consisting of a copolyester composed of a polyethylene glycol and sodium salt of 5-sulfoisophthalic acid as copolymerization components and ethylene
  7. 7. terephthalate as a main repeating unit and a sheath component having each moisture absorption at 34°C at 90%RH satisfying relationship 10≥A≥B and 5≥B≥1 (A is moisture absorption of the core component and B is moisture absorption of the sheath component) and a weight ratio of both the core and the sheath components of 20/80 to 70/30 and is obtained by melt spinning through a spinneret for concentric circular hollow conjugate spinning and has a hollow part having 2-6% hollow ratio continuous in the longer direction in the interior of the fiber. JP11181676A Toray Industries 1999-07-06 Title: HYGROSCOPIC TEXTILE STRUCTURAL PRODUCT AND ITS PRODUCTION Abstract: Source: PROBLEMTO BE SOLVED: To obtain the subject product simultaneously bearing excellent hygroscopicity, durability and color fastness by providing an acidic group- contg. polyester-based textile structural product with a carboxylic acid salt-type amphoteric compound alogn with carrying out dyeing. SOLUTION: This hygroscopic textile structural product is obtained by immersion treatment at 80-130°C of a textile structural product such as yarns or a fabric comprising acidic group-contg. polyester fiber such as polyethylene terephthalate copolymerized with 1.5-7 (pref. 2-5) mol.% of 5-sodium sulfoisophthalate and/or 5-potassium sulfoisophthalate in a treatment liquid containing a dye and a carboxylic acid salt- type amphoteric compound such as lauryl dimethylbetaine or coconut oil fatty acid amidopropylbetaine to effect applying the amphoteric compound at 0.1-5 wt.% to the textile structural product. JP2000054262A Teijin Ltd 2000-02-22 Title: [EN] HYGROSCOPIC POLYESTER FIBER Abstract: PROBLEMTO BE SOLVED: To produce hygroscopic polyester fibers excellent in hygroscopictiy and laundering resistance by forming fibers of a polyester compounded with a specific polyalkylene oxide and then graft-polymerizing a polyalkylene glycol derivation on the surfaces of the fibers. SOLUTION: The hygroscopic polyester fibers are produced by spinning poly(ethylene terephthalate) compounded with 0.1-15 weight percent polyalkylene oxide (e.g. polyethylene oxide) having =100,000 (pref. 500,000-4,000,000) weight average molecular weight to form fibers, forming cloth with the fibers and then graft- polymerizing a polyalkylene glycol derivative (e.g. a polyalkylene glycol diacrylate and/or a polyalkylene glycol dimethacrylate) having 100,000 (pref. 250-1,500) weight average molecular weight on the surfaces of the cloth.
  8. 8. JP2003306833A Nippon Polyester Co Ltd 2003 -10-31 Title: [EN] HYGROSCOPIC POLYESTER FIBER Abstract: PROBLEMTO BE SOLVED: To provide a fiber exhibiting a soft touch feeling and having excellent hygroscopicity by regulating the alkali weight reduction rate of the fiber within the range without actual problems and carrying out a uniform weight reduction processing.SOLUTION: The hygroscopic polyester fiber comprises a polyalkylene terephthalate containing 5-30 mass% of a polyether compound or a polyether compound derivative having =4,000 average molecular weight and an aromatic dicarboxylic acid component having at least =1 phenolic hydroxy groups is copolymerized in an amount of 0.5-5 mol% based on the whole acid components. JP2004084087A Nippon Ester Co Ltd 2004-03-18 Title: HYGROSCOPIC POLYESTER CONJUGATE FIBER Abstract: PROBLEMTO BE SOLVED: To obtain a conjugate fiber which develops a soft feeling by carrying out uniform weight reduction processing and has excellent hygroscopicity.SOLUTION: The hygroscopic polyester conjugate fiber is a core-sheath type polyester conjugate fiber comprising a polyalkylene terephthalate as a core component which contains 10-30 mass % of a polyether compound or a polyether compound derivative having 4,000-15,000 average molecular weight and is copolymerized with 0.5-5 mol % based on the total acid components of a sulfonate group-containing aromatic dicarboxylic acid and/or a phenolic hydroxy group- containing aromatic dicarboxylic acid and 0.5-5 mol % based on the total acid components of a dimer acid and has =5% swelling ratio and a polyester as a sheath component composed of an alkylene terephthalate as a main repeating unit. The hygroscopic polyester conjugate fiber has =2.5 mass % coefficient of moisture absorption of the conjugate fiber (in an atmosphere at 34 Degrees Centigrade at humidity of 90% RH).

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