• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention concerns improving the properties of cellulose carbamate fibres. The wet strength properties in particular can be improved by treating the fibres with alkalis or organic bases, aiming to reduce the number of carbamate groups. The procedure may also be applied in the manufacturing of regenerated cellulose fibres.
    公开号:SU1612998A3
    申请号:SU833663402
    申请日:1983-11-17
    公开日:1990-12-07
    发明作者:Турунен Олли；Хуттунен Йоуко；Экман Курт；Эклунд Видар；Манделл Лео
    申请人:Несте Ой (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to the modification of the properties of carbamate based fibers. pulp.
    The purpose of the invention is to vary the physicomechanical characteristics of the fibers.
    Try on the Bolocna carbamate cellulose as follows. Bleached spruce cellulose sulphate (400 g) with a DP (degree of polymerization) brought to 390 using I-radiation, impregnate at -40 ° C with 3.3 liters of liquid ammonia in which Thunder is dissolved, 400 g of urea. The cellulose is distilled in this solution below the boiling point of ammonia for 6 hours, after which the temperature is brought to room temperature. After the ammonia is evaporated, the cellulose treated with urea is placed in a vacuum oven at 135 ° C for 3 hours. During the whole. this time through the oven purge air.
    The reaction product is washed with methanol, three times with water and again once with methanol. The air dried product has a DR 340 and a nitrogen content of 1.7% by weight. A solution is obtained, a solution of the thus-obtained cellulose carbamate in a 10% by weight aqueous NaOH solution, which also contains ZnO to increase the solubility. The content of carbamate in the solution is 5.5 wt.%, And the viscosity by Stokes viscometer is 50 s. The viscosity index was 495. The resulting solution was injected into a solution of sulfuric acid through a spinneret with 100 holes with a diameter of 0.09 mm. The precipitating solution contains, wt%: sulfuric acid 10; aluminum sulphate 7; sulfate sodium 20.
    After deposition, the fibers stretch from 0 to 80% to improve their strength. After washing and drying, OO)
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    with
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    fibers of carbamate cellulose A-G are used, which are used in other examples. Table 1 shows the fiber manufacturing conditions.
    Example 2. The fibers obtained in example 1 are treated with NaOH solutions of various concentrations. The wettability of the fibers is determined before and after alkaline treatment. The alkaline solubility of the fibers is determined by the standard procedure in wt.% Of the NaOH solution.
    Table 2 presents the properties of the fibers before and after treatment with NaOH. From the data of Table 2, it follows that the alkaline treatment of cellulose carbamate fibers will increase the strength in the wet state if the alkali concentration is at the required level. If the alkali concentration reaches 21% by weight, the strength of the fibers deteriorates. If the alkaline treatment is carried out at a higher temperature, a higher strength is achieved in a shorter period of time. Stretching the fibers at the forming stage also has a positive effect on strength.
    PRI me R 3. The treatment of cellulose carbamate fibers with NaOH is carried out according to Example 2 at a higher temperature. Table 3 shows the properties of the fibers before and after alkaline treatment. - From the data of Table 3 it follows that a shorter treatment time can be achieved at temperatures of 100 ° C
    EXAMPLE 4 Alkaline treatment of cellulose carbamate fibers of Example 2 is carried out. Potassium hydroxide is used as alkali. Table 4 shows the properties of the fibers before and after alkaline treatment. From the data of Table 4 it follows that potassium hydroxide is not as effective as sodium hydroxide. Higher alkali concentrations can be used for treatment than NaOH.
    EXAMPLE 5 Alkaline treatment of cellulose carbamate fibers of Example 2 is carried out. As alkali
    five
    0
    five
    0
    tetramethylammonium hydroxide is used. Table 5 presents the properties of the fibers before and after alkaline treatment.
    EXAMPLE 6 The fibers prepared in Example 1 are treated with NaOH so that a substantial portion of the carbamate groups is removed, and the solubility of the fibers in the alkali is reduced to the level of regenerated fibers obtained in the viscose process. Table 6 presents the properties of the fibers before and after the alkaline treatment and the properties of the regenerated fibers after the alkaline treatment.
    权利要求:
    Claims (1)
    [1]
    Invention Formula
    A method of modifying the properties of fibers from a cellulose derivative, including treating the fibers with a wave base solution, characterized in that, in order to vary the physicomechanical characteristics of the fibers, cellulose carbamate is used as a cellulose derivative, as an aqueous base solution 0.25 -2.0 wt.% - a solution of NaOH, KOH or tetramethyl-ammonium hydroxide and the treatment is carried out at a temperature from room temperature to 100 ° C for 0.05 - 72 hours.
    Table 1
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    类似技术:
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    同族专利:
    公开号 | 公开日
    JPS59500621A|1984-04-12|
    DE3362056D1|1986-03-20|
    FI821106A0|1982-03-30|
    IT8320336D0|1983-03-29|
    EP0103618B1|1986-02-05|
    WO1983003433A1|1983-10-13|
    CA1205958A|1986-06-17|
    JPS6366944B2|1988-12-22|
    FI64605C|1983-12-12|
    IT1205634B|1989-03-23|
    DD211586A5|1984-07-18|
    FI64605B|1983-08-31|
    EP0103618A1|1984-03-28|
    US4583984A|1986-04-22|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3560139A|1966-09-06|1971-02-02|Kurashiki Spinning Co Ltd|Process for improving cellulose textile material by alkaline treatment|
    FI61033C|1979-10-17|1982-05-10|Neste Oy|FRAMEWORK FOR CLEANING OF ALKALINE CELLULOSE|
    FI62318C|1981-01-27|1982-12-10|Neste Oy|FORM OF CELLULOSE DERIVATIVES OF FRAMSTAELLNING AV ETT ALKALILOESLIGT|
    FI64603C|1981-12-30|1983-12-12|Neste Oy|EXTENSION OF CELLULOSE EXTENSION|
    FI64602C|1981-12-30|1983-12-12|Neste Oy|FORM OF CELLULOSE DERIVATIVES|
    FI64605C|1982-03-30|1983-12-12|Neste Oy|FOERFARANDE FOER BEHANDLING AV FIBER AV CELLULOSADERIVAT|FI64605C|1982-03-30|1983-12-12|Neste Oy|FOERFARANDE FOER BEHANDLING AV FIBER AV CELLULOSADERIVAT|
    FI81842C|1986-12-31|1990-12-10|Neste Oy|Nonwoven fiber product|
    US4789006A|1987-03-13|1988-12-06|Teepak, Inc.|Cellulose aminomethanate sausage casings|
    US4762564B1|1987-03-13|1992-12-29|Tee Pak Inc|
    US5215125A|1987-03-13|1993-06-01|Teepak, Inc.|Cellulose aminomethanate sausage casings|
    FI77673C|1987-07-07|1989-04-10|Neste Oy|Process for lowering the carbamate content of products made from cellulose carbamate and products produced by the process.|
    US4997934A|1989-06-12|1991-03-05|Teepak, Inc.|Cellulose aminomethanate by weight loss monitoring|
    US4999425A|1989-06-12|1991-03-12|Teepak, Inc.|Cellulose aminomethanate by ion-exchange extraction|
    US4997933A|1989-06-12|1991-03-05|Teepak, Inc.|Cellulose aminomethanate by acid neutralization|
    US5229506A|1989-06-12|1993-07-20|Teepak, Inc.|Preparation of cellulose aminomethanate|
    US5203038A|1991-07-12|1993-04-20|Michael Gibbs|Water level sensing apparatus for a swimming pool|
    SE505230C2|1993-04-21|1997-07-21|Birla Research Inst For Applie|Manufacture of regenerated cellulose fiber by zinc-free viscous process|
    AT402741B|1995-10-13|1997-08-25|Chemiefaser Lenzing Ag|METHOD FOR PRODUCING CELLULOSIC FIBERS|
    DE19721609A1|1997-05-23|1998-11-26|Zimmer Ag|Method and device for spinning cellulose carbamate solutions|
    DE10126244B4|2001-05-30|2005-05-12|Deutsche Institute für Textil- und Faserforschung Stuttgart|Process for the production of a cellulosic fibrous or textile fabric and the use of the fabric, knitted fabric or nonwoven fabric obtained therefrom|
    DE102004007618A1|2004-02-17|2005-09-22|Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.|Process for the production of nonwovens, nonwoven fabric and its use|
    DE102004007617B4|2004-02-17|2007-02-08|Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.|Process for producing a nonwoven fabric, nonwoven fabric and its use|
    US20070298670A1|2004-02-17|2007-12-27|Peter Weigel|Method for Producing Non-Wovens, a Corresponding Non-Woven and the Production Thereof|
    US7981337B2|2006-04-21|2011-07-19|Wuhan University|Use of aqueous NaOH/thiourea solution in pilot-scale production of cellulose products|
    KR100929437B1|2007-08-02|2009-12-03|포항공과대학교 산학협력단|Method for preparing an amine having optical activity|
    WO2018144309A1|2017-01-31|2018-08-09|Kimberly-Clark Worldwide, Inc.|High bulk tissue comprising cross-linked fibers|
    US20200299416A1|2017-03-15|2020-09-24|Treetotextile Ab|Regenerated cellulosic fibres spun from an aqueous alkaline spindope|
    IT201900002479A1|2019-02-20|2020-08-20|Montefibre Mae Tech S R L|Production process of cellulose derivatives|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FI821106A|FI64605C|1982-03-30|1982-03-30|FOERFARANDE FOER BEHANDLING AV FIBER AV CELLULOSADERIVAT|
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