• 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:
    Fibrous polyolefin nonwoven sheets are bonded and stretched in a continuous, multiple stage process. First, the sheet is heated without significant stretching to a temperature that is close to, but below, the melting temperature of the polyolefin. Then, as the sheet is forwarded to a first stretching stage, the sheet temperature is decreased by 5 to 40°C and thereafter the sheet is alternately heated and cooled as it passes through successive stretching stages, before final cooling to below 60°C. In comparison to similar sheets bonded and stretched at constant temperature, the sheets produced by the process of the present invention are significantly more uniform in thickness.
    公开号:SU1581228A3
    申请号:SU874202005
    申请日:1987-02-26
    公开日:1990-07-23
    发明作者:Сунг Лим Хюн
    申请人:Е.И.Дюпон Де Немур Энд Компани (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to the textile industry,
    The drawing is a diagram explaining the method.
    The purpose of the invention is to increase the uniformity of the material in length,
    The method involves forming from a molten polymer in a stream of hot gas plexes based on film-forming elementary fibers of linear polyethylene, forming a sheet material from them, heating it to a bonding temperature of the fibers not exceeding the melting point of polyethylene by 3-8 ° C. material at least in two stages to a length greater than its original length not less than 1.2 times. Then, the material is cooled to a temperature not exceeding 60 ° C, with a simultaneous impact on the material having t 100 ° C, a load that is applied perpendicular to the surface of the material.
    During the stretching of the material in two or more stages, the temperature is lowered first by 5-40 ° C (at the first stage of stretching), and then with further stretching, the material is alternately heated and cooled so that the temperature of the sheet material, for example film, to the final its cooling varies in the range of 5-350 ° C. During the alternate
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    heating and cooling during stretching the temperature of the material is maintained at a level not exceeding the bonding temperature of the fibers, and during cooling the temperature is lowered to a level not lower than 100 ° C,
    The method is suitable for wide limits of the bulk weight of the sheet material, but preferably the bulk density is maintained in the range of 35-70 g / m. The material is stretched in the longitudinal direction, and the ratio of the length of the material after stretching to the length before stretching is 125: 100-170: 100 when the number of stretching stages is preferably 3-4,
    The method is carried out as follows.
    The sheet material 1 is transported through a plurality of rolls. When transported through steel rollers 2-5 with internal oil heating, the temperature of the sheet rises from room temperature to the binding temperature of the fibers. When the material 1 enters the individual stages of stretching, it is cooled by the action of the roller 6, and then at subsequent stages of stretching during contact with the steel rollers 6–9 with internal oil heating is alternately heated and cooled. Rollers 2-6 work in such a way that the stretching of the sheet material practically does not occur because during transportation from roller 2 to roller 6, the sheet material is kept under sufficient tension, since each next roll, compared to the previous, rotates a little faster (approximately one%),
    The speed of material transfer in three stages of stretching during transportation from roller 6 to roller 7, from calico 7 to roller 8 and from roller 8 to roller 9 is increased. Due to the operation of the steel rollers 10 and 11 with internal cooling, the material is first cooled on one side and then on the other side. When the temperature of the material reaches 100 ° C or more when being transported from roller 12 to roller 13 in order to prevent excessive shrinkage in the transverse direction perpendicular to the surface of the sheet
    the material is applied ii
    Due to the effect of the corona devices 14 and 15, measurements of static electricity occur on the material, which cause a dense one. attracting the sheet to the rollers. Due to the action of the rollers 16-17, 18-19, 20-21, 22-23, 24-25 providing the S-shaped path of the material, the support rollers 26-32 with rubber coating and the voltage acting on the sheet material during transport, a mechanical load acts on it in the perpendicular direction to the surface of the material, which increases its contact with the heating and cooling rollers.
    From reducing shrinkage to a minimum, a pair of rollers, providing an S-shaped path of the material, are placed so that the free section of the heated material is minimal. I
    20The proposed method allows to obtain a material with an increased uniformity in thickness.
    five
    权利要求:
    Claims (2)
    [1]
    Invention Formula
    1, Continuous method of bonding and stretching a nonwoven sheet material, in which a melt is molded from a polymer in a jet.
    0 hot plexonite gas based on film-forming elementary fibers made of linear polyethylene, forming sheet material from them, heating it to fiber bonding temperature,
    5. Not exceeding the melting point of polyethylene by 3-8 ° C, then stretching the material in at least two stages to a length exceeding its initial length by no less than 1.2 times,
    0 cool the zo material to a temperature not exceeding 60 ° C with simultaneous exposure of the sheet material at a temperature of 100 ° C to a load that is applied perpendicular to the surface of the sheet material, characterized in that, in order to increase the uniformity of the material in thickness immediately after heating sheet material
    Q to the fiber bonding temperature when feeding it to the first stretching stage, the temperature of the sheet material is lowered by 5-40 ° C, and in subsequent stages of stretching it is alternately heated and cooled, and with alternating heating and cooling in subsequent stages The temperature of the sheet material is maintained at a level not exceeding the fiber bonding temperature, and when cooled, the temperature is lowered to a level not lower than 100 ° C.
    [2]
    2. The method according to claim. Characterized in that before stretching the bulk weight of the sheet material
    They support a range of 35-70 g / mg, while stretching the sheet material is carried out in the longitudinal direction in two or three stages to a length that is preferably greater than the initial length of 1.25-1.7 pa.
    26
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    类似技术:
    公开号 | 公开日 | 专利标题
    SU1581228A3|1990-07-23|Continuous method of binding and stretching of non-woven sheet material
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    GB987574A|1965-03-31|Improvements in decorative processes
    SE9301913D0|1993-06-04|MACHINE FOR PREPARING A FIBER COAT
    US4140740A|1979-02-20|Flatness control of thermoplastic film
    GB2053860A|1981-02-11|Apparatus for transporting sheet material
    US3916491A|1975-11-04|Tenter clip machine for biaxially stretching thermoplastic film
    US5232533A|1993-08-03|Method for heat-setting cross-laminated non-woven fabrics
    MXPA00007050A|2002-06-04|Fifth generation drawing route.
    US4124677A|1978-11-07|Method of manufacturing polyvinyl alcohol films oriented in two orthogonal directions
    US3639207A|1972-02-01|Method for drying nonwoven fabric
    EP0049206B1|1984-05-02|Method of improving the flatness of compression rolled plastic film
    US3853662A|1974-12-10|Method for laminating uniaxially stretched thin layers of film as warps and wefts
    JP2554553B2|1996-11-13|Method for producing support for photographic light-sensitive material
    US2697851A|1954-12-28|Method and apparatus for treating plastic web
    GB1161568A|1969-08-13|Method for Making Continuous Filament-like Products from Films
    US3953909A|1976-05-04|Method for producing laterally spread reticular web of split fibers
    SE430799B|1983-12-12|PROCEDURE FOR SMOOTHING THE SURFACE OF A PAPER MANUFACTURE USES FILTER, WIRELY OR SIMILAR ENDLESS, THERMOPLASTIC TREATMENT COAT AND PLANT FOR APPLICATION OF THE PROCEDURE
    US3669795A|1972-06-13|Method for making a laminated body of pliable thin layer materials
    JPH093761A|1997-01-07|Production of reinforced nonwoven fabric
    US3526695A|1970-09-01|Corrugation control of heat relaxed thermoplastic films
    JPS55133047A|1980-10-16|Photosensitive material processing apparatus
    JPH064278B2|1994-01-19|Operation method of simultaneous biaxial stretching device
    JP2000198140A|2000-07-18|Tenter clip and production of thermoplastic resin film
    同族专利:
    公开号 | 公开日
    EP0236091A2|1987-09-09|
    CA1279985C|1991-02-12|
    ZA871398B|1988-10-26|
    DE3779445D1|1992-07-09|
    SG78792G|1992-10-02|
    AU6927887A|1987-09-03|
    HK75692A|1992-10-09|
    DE3779445T2|1993-01-28|
    KR940002387B1|1994-03-24|
    JPS62206076A|1987-09-10|
    EP0236091A3|1989-08-30|
    KR870008072A|1987-09-24|
    MX163042B|1991-08-07|
    IL81703D0|1987-09-16|
    US4652322A|1987-03-24|
    EP0236091B1|1992-06-03|
    JPH0791772B2|1995-10-04|
    BR8700966A|1987-12-29|
    AU582338B2|1989-03-16|
    引用文献:
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    US4159297A|1973-08-11|1979-06-26|James Mackie & Sons Limited|Continuous process for production of latent crimp filaments|
    US4537733A|1983-10-31|1985-08-27|E. I. Du Pont De Nemours And Company|Nonwoven fiber-sheet process|
    US4554207A|1984-12-10|1985-11-19|E. I. Du Pont De Nemours And Company|Stretched-and-bonded polyethylene plexifilamentary nonwoven sheet|US5069533A|1988-06-29|1991-12-03|Idemitsu Kosan Co., Ltd.|Method of orienting liquid crystal optical device|
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    US4981747A|1988-09-23|1991-01-01|Kimberly-Clark Corporation|Composite elastic material including a reversibly necked material|
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    US4941947A|1989-09-29|1990-07-17|E. I. Du Pont De Nemours And Company|Composite fibrous polyethylene sheet|
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    US5114781A|1989-12-15|1992-05-19|Kimberly-Clark Corporation|Multi-direction stretch composite elastic material including a reversibly necked material|
    DE4000495C2|1990-01-10|1994-03-03|Spohn Verpackungswerke Gmbh &|Method and device for laminating an unstretched film with an stretched film and a multilayer film|
    US5143679A|1991-02-28|1992-09-01|The Procter & Gamble Company|Method for sequentially stretching zero strain stretch laminate web to impart elasticity thereto without rupturing the web|
    CA2101833A1|1992-12-14|1994-06-15|Kimberly-Clark Worldwide, Inc.|Stretchable meltblown fabric with barrier properties|
    US5320891A|1992-12-31|1994-06-14|Kimberly-Clark Corporation|Particle barrier nonwoven material|
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    US5482765A|1994-04-05|1996-01-09|Kimberly-Clark Corporation|Nonwoven fabric laminate with enhanced barrier properties|
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    CA2136576C|1994-06-27|2005-03-08|Bernard Cohen|Improved nonwoven barrier and method of making the same|
    WO1996017569A2|1994-12-08|1996-06-13|Kimberly-Clark Worldwide, Inc.|Method of forming a particle size gradient in an absorbent article|
    CA2153278A1|1994-12-30|1996-07-01|Bernard Cohen|Nonwoven laminate barrier material|
    AU5747396A|1995-05-25|1996-12-11|Kimberly-Clark Worldwide, Inc.|Filter matrix|
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    KR20000010588A|1996-04-23|2000-02-15|이.아이,듀우판드네모아앤드캄파니|Bonded polyolefin sheet|
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    AT412199B|2001-06-06|2004-11-25|Sml Maschinengesellschaft Mbh|DEVICE AND METHOD FOR MONOAXIAL STRETCHING A PLASTIC FILM UNDER TRAIN|
    US20040102125A1|2002-11-27|2004-05-27|Morman Michael Tod|Extensible laminate of nonwoven and elastomeric materials and process for making the same|
    US20060128247A1|2004-12-14|2006-06-15|Kimberly-Clark Worldwide, Inc.|Embossed nonwoven fabric|
    DE102005048443A1|2005-10-07|2007-04-12|Linotec Development Gmbh|Spunbond-film laminate|
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    EP2732958B1|2012-11-20|2017-06-28|Airbus Operations GmbH|Method and apparatus for forming a curved prepreg strip|
    US9168704B2|2013-03-15|2015-10-27|I-Chung Liao|Manufacturing method of an activated-carbon filter element|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US06/835,011|US4652322A|1986-02-28|1986-02-28|Process for bonding and stretching nonwoven sheet|
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