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    Absorbent foam
    71.
    发明授权
    Absorbent foam 失效
    吸水泡沫

    公开(公告)号：US5985434A

    公开(公告)日：1999-11-16

    申请号：US977918

    申请日：1997-11-25

    Applicant: Jian Qin ,  Palani Raj Ramaswami Wallajapet ,  Gary D. Williams

    Inventor： Jian Qin ,  Palani Raj Ramaswami Wallajapet ,  Gary D. Williams

    IPC: A61L15/22 ,  A61L15/42 ,  C08J9/28 ,  A61F13/15 ,  B32B3/26

    CPC classification number: C08J9/28 ,  A61L15/22 ,  A61L15/425 ,  C08J2201/052 ,  C08J2300/00 ,  Y10S521/905 ,  Y10T428/249978 ,  Y10T428/24998

    Abstract: Disclosed is an absorbent foam that exhibits desirable softness and flexibility properties yet is highly absorbent. In one embodiment, the absorbent foam comprises a water-swellable, water-insoluble polymer wherein the absorbent foam exhibits a Free Swell value of at least about 10 grams of liquid per gram of absorbent foam and a Softness value that is less than about 30 grams of force per gram per square meter of absorbent foam. In a second embodiment, the absorbent foam has an average cell size of the cells in the absorbent foam between about 10 microns to about 100 microns and an average wall thickness of the cells in the absorbent foam between about 0.1 micron to about 30 microns. Such an absorbent foam may be used in a disposable absorbent product intended for the absorption of fluids such as body fluids.

    Abstract translation: 公开了一种吸收性泡沫，其表现出所需的柔软性和柔软性，但是具有高吸收性。 在一个实施方案中，吸收性泡沫包括水溶胀性水不溶性聚合物，其中吸收性泡沫体表现出每克吸收性泡沫体至少约10克液体的自由溶胀值和小于约30克的柔软度值 的力每克/平方米的吸收性泡沫。 在第二个实施方案中，吸收性泡沫体具有在约10微米至约100微米之间的吸收性泡沫体中的细胞的平均泡孔尺寸和约0.1微米至约30微米的吸收性泡沫体中的细胞的平均壁厚度。 这种吸收性泡沫可以用于旨在吸收诸如体液的流体的一次性吸收产品中。

    Process for preparing an absorbent foam
    72.
    发明授权
    Process for preparing an absorbent foam 失效
    制备吸收性泡沫的方法

    公开(公告)号：US5948829A

    公开(公告)日：1999-09-07

    申请号：US978263

    申请日：1997-11-25

    Applicant: Palani Raj Ramaswami Wallajapet ,  Jian Qin ,  Gary D. Williams

    Inventor： Palani Raj Ramaswami Wallajapet ,  Jian Qin ,  Gary D. Williams

    IPC: A61L15/22 ,  A61L15/42 ,  C08J9/28

    CPC classification number: C08J9/28 ,  A61L15/22 ,  A61L15/425 ,  C08J2201/052 ,  C08J2300/00

    Abstract: Disclosed is a process for preparing an absorbent foam. The process generally comprises forming a solution of a polymer in a solvent, freezing the solution at a relatively slow cooling rate to a temperature below the freezing point of the solvent, removing the solvent from the frozen solution, and recovering the polymer to form a water-swellable, water-insoluble polymeric foam. The process has been found to enable one to prepare an absorbent foam that exhibits desirable softness and flexibility properties yet is highly absorbent. Such an absorbent foam may be used in a disposable absorbent product intended for the absorption of fluids such as body fluids.

    Abstract translation: 公开了一种制备吸收性泡沫体的方法。 该方法通常包括在溶剂中形成聚合物溶液，以比较缓慢的冷却速度将溶液冷冻至低于溶剂凝固点的温度，从冷冻溶液中除去溶剂，并回收聚合物以形成水 不溶于水的聚合物泡沫。 已经发现该方法使得能够制备显示出所需的柔软性和柔性的吸收性泡沫体，但是它是高吸收性的。 这种吸收性泡沫可以用于旨在吸收诸如体液的流体的一次性吸收产品中。

    Method for preparing oriented microporous film
    73.
    发明授权
    Method for preparing oriented microporous film 失效
    制备取向微孔薄膜的方法

    公开(公告)号：US5238618A

    公开(公告)日：1993-08-24

    申请号：US754277

    申请日：1991-08-30

    Applicant: Kevin E. Kinzer

    Inventor： Kevin E. Kinzer

    IPC: A61F13/00 ,  A61L9/04 ,  B01D67/00 ,  B29C55/00 ,  C08J5/18 ,  C08J9/28

    CPC classification number: C08J9/28 ,  A61F13/00008 ,  A61L9/042 ,  B01D67/0027 ,  B01D67/003 ,  B01D67/0083 ,  B01D71/26 ,  B29C55/005 ,  C08J5/18 ,  A61F2013/00255 ,  A61F2013/00863 ,  B01D2325/022 ,  B29K2023/06 ,  B29K2023/12 ,  C08J2201/052

    Abstract: A method for preparing an oriented microporous shaped article is provided. The method comprises the steps of melt blending thermoplastic polymer with a solubilizing amount of a compatible liquid to form a homogeneous solution, forming a shaped article from the solution, cooling the shaped article at a rate and to a temperature sufficient to initiate thermodynamic, non-equilibrium liquid-liquid phase separation and then to solidify the thermoplastic polymer, stretching the article in a first direction sufficient to permanently attenuate the article and effect orientation of the polymer, and removing at least a substantial portion of the compatible liquid before or after the stretching step to form an oriented microporous shaped article.

    Abstract translation: 提供了一种制备定向微孔成型制品的方法。 该方法包括以下步骤：将热塑性聚合物与增溶量相容的液体熔融共混以形成均匀的溶液，从溶液中形成成型制品，以一定的速度冷却成型制品，该温度足以引发热力学， 平衡液 - 液相分离，然后使热塑性聚合物固化，在第一方向上拉伸制品，以便使制品永久衰减并且影响聚合物的取向，并且在拉伸之前或之后除去至少大部分的相容液体 步骤以形成定向的微孔成形制品。

    Process for producing micro-porous membrane of ultra-high-molecular-weight alpha-olefin polymer, micro-porous membranes and process for producing film of ultra-high-molecular-weight alpha-olefin polymer
    77.
    发明授权
    Process for producing micro-porous membrane of ultra-high-molecular-weight alpha-olefin polymer, micro-porous membranes and process for producing film of ultra-high-molecular-weight alpha-olefin polymer 失效
    用于生产超高分子量α-烯烃聚合物微孔膜的方法，微孔膜和用于生产超高分子量α-烯烃聚合物膜的方法

    公开(公告)号：US4734196A

    公开(公告)日：1988-03-29

    申请号：US832916

    申请日：1986-02-24

    Applicant: Koichi Kono ,  Shoichi Mori ,  Kenji Miyasaka ,  Jyoichi Tabuchi

    Inventor： Koichi Kono ,  Shoichi Mori ,  Kenji Miyasaka ,  Jyoichi Tabuchi

    IPC: B01D67/00 ,  B01D71/26 ,  C08J5/18 ,  C08J9/28 ,  B29C43/00 ,  B29C55/12

    CPC classification number: C08J9/28 ,  B01D67/0009 ,  B01D71/26 ,  C08J5/18 ,  B01D2323/08 ,  B01D2323/12 ,  B01D2325/34 ,  C08J2201/052 ,  C08J2201/0543 ,  C08J2201/0546 ,  C08J2323/02

    Abstract: A micro-porous membrane of ultra-high-molecular-weight alpha-olefin polymer having a weight-average molecular weight greater than 5.times.10.sup.5, the micro-porous membrane having through holes 0.01 to 1 micrometer in average pore size, with a void ratio from 30 to 90% and being oriented such that the linear draw ratio in one axis is greater than two and the areal draw ratio is greater than ten. The micro-porous membrane is obtained by forming a gel-like object from a solution of an alpha-olefin polymer having a weight-average molecular weight greater than 5.times.10.sup.5, removing at least 10 wt % of the solvent contained in the gel-like object so that the gel-like object contains 10 to 90 wt % of alpa-olefin polymer, orientating the gel-like object at a temperature lower than that which is 10.degree. C. above the melting point of the alpa-olefin polymer, and removing the residual solvent from the orientated product. A film is produced from the orientated product by pressing the orientated product at a temperature lower than that of the melting point of the alpha-olefin polymer.

    Abstract translation: 超高分子量α-烯烃聚合物的微孔膜的重均分子量大于5×10 5，微孔膜具有平均孔径为0.01-1微米的通孔，孔隙率为 30〜90％，一方向的线性拉伸比大于2，面积比大于10。 微孔膜通过从重均分子量大于5×10 5的α-烯烃聚合物的溶液中形成凝胶状物质，除去至少10重量％的凝胶状物质中所含的溶剂 使得凝胶状物体含有10〜90重量％的α-烯烃聚合物，使凝胶状物质的温度低于高于α-烯烃聚合物的熔点10℃的温度，除去 来自定向产物的残留溶剂。 通过在比α-烯烃聚合物的熔点低的温度下压制定向产物，从定向产物制备膜。

    Low density microcellular foams
    78.
    发明授权
    Low density microcellular foams 失效
    低密度微孔泡沫

    公开(公告)号：US4673695A

    公开(公告)日：1987-06-16

    申请号：US785436

    申请日：1985-10-08

    Applicant: James H. Aubert ,  Roger L. Clough ,  John G. Curro ,  Carlos A. Quintana ,  Edward M. Russick ,  Montgomery T. Shaw

    Inventor： James H. Aubert ,  Roger L. Clough ,  John G. Curro ,  Carlos A. Quintana ,  Edward M. Russick ,  Montgomery T. Shaw

    IPC: B01D39/16 ,  B01D67/00 ,  B01D71/28 ,  C08J9/26 ,  C08J9/28

    CPC classification number: C08J9/28 ,  B01D39/1676 ,  B01D67/003 ,  B01D71/28 ,  C08J9/26 ,  C08J2201/0482 ,  C08J2201/0484 ,  C08J2201/052 ,  C08J2325/06

    Abstract: Low density, microporous polymer foams are provided by a process which comprises forming a solution of polymer and a suitable solvent followed by rapid cooling of the solution to form a phase-separated system and freeze the phase-separated system. The phase-separated system comprises a polymer phase and a solvent phase, each of which is substantially continuous within the other. The morphology of the polymer phase prior to and subsequent to freezing determine the morphology of the resultant foam.Both isotropic and anisotropic foams can be produced. If isotropic foams are produced, the polymer and solvent are tailored such that the solution spontaneously phase-separates prior to the point at which any component freezes. The morphology of the resultant polymer phase determines the morphology of the resultant foam and the morphology of the polymer phase is retained by cooling the system at a rate sufficient to freeze one or both components of the system before a change in morphology can occur. Anisotropic foams are produced by forming a solution of polymer and solvent that will not phase separate prior to freezing of one or both components of the solution. In such a process, the solvent typically freezes before phase separation occurs. The morphology of the resultant frozen two-phase system determines the morphology of the resultant foam.The process involves subjecting the solution to essentially one-dimensional cooling. Means for subjecting such a solvent to one-dimensional cooling are also provided.Foams having a density of less than 0.1 g/cc and a uniform cell size of less than 10 .mu.m and a volume such that the foams have a length greater than 1 cm are provided.

    Abstract translation: 通过包括形成聚合物溶液和合适溶剂的方法提供低密度，微孔聚合物泡沫，然后快速冷却溶液以形成相分离系统并冷冻相分离系统。 相分离系统包括聚合物相和溶剂相，其各自在另一个内基本连续。 在冷冻之前和之后的聚合物相的形态决定所得泡沫的形态。 可以生产各向同性和各向异性泡沫。 如果产生各向同性泡沫，则定制聚合物和溶剂使得溶液在任何组分冻结的点之前自发相分离。 所得聚合物相的形态决定了所得泡沫体的形态，并且通过以足以在形态变化发生之前冻结体系的一个或两个组分的速率冷却系统来保留聚合物相的形态。 通过形成聚合物和溶剂的溶液来产生各向异性泡沫，该溶液在溶液的一个或两个组分冷冻之前不会相分离。 在这种过程中，溶剂通常在相分离发生之前冻结。 所得冷冻两相体系的形态决定所得泡沫的形态。 该方法包括使溶液基本上进行一维冷却。 还提供了使这种溶剂进行一维冷却的方法。 具有小于0.1g / cc的密度和小于10μm的均匀泡孔尺寸的泡沫和具有长度大于1cm的泡沫的体积。

    Method for the production of porous bodies with adjustable total pore volume, adjustable pore size and adjustable pore walls
    79.
    发明授权
    Method for the production of porous bodies with adjustable total pore volume, adjustable pore size and adjustable pore walls 失效
    用于生产具有可调总孔体积，可调孔径和可调孔壁的多孔体的方法

    公开(公告)号：US4594207A

    公开(公告)日：1986-06-10

    申请号：US465560

    申请日：1983-02-10

    Applicant: Christoph Josefiak ,  Friedbert Wechs

    Inventor： Christoph Josefiak ,  Friedbert Wechs

    IPC: B01D67/00 ,  B01D69/08 ,  B01D71/26 ,  B29C67/20 ,  C08J9/28 ,  C08J9/26

    CPC classification number: C08J9/28 ,  B01D67/003 ,  B01D69/08 ,  B01D71/26 ,  B29C67/202 ,  C08J2201/052

    Abstract: Porous bodies, particularly membranes in the form of hollow filaments, are produced by heating a polymer above the upper critical temperature T.sub.c in a mixture of two compounds A and B, liquid and miscible at the dissolving temperature, whereby the employed mixture (polymer, compounds A and B) in liquid aggregate state displays a miscibility gap, the compound A is a solvent for the polymer and the compound B, which preferably is a non-solvent or a swelling agent for the polymer, raises the phase separation temperature of a solution composed of the polymer and compound A. After the dissociation, the components A and/or B if necessary are extracted. Through use of non-toxic substances such as e.g. edible oil as compound A and castor oil as compound B, bodies are obtained which are non-toxic and unobjectionable for use in medical areas and in the foods industry, among others.

    Abstract translation: 通过在两个化合物A和B的混合物中加热高于上限临界温度Tc的聚合物来制备多孔体，特别是中空丝形式的膜，其在溶解温度下是液体的和可混溶的，由此使用的混合物（聚合物，化合物 A和B）显示混合间隙，化合物A是聚合物的溶剂，化合物B优选为聚合物的非溶剂或溶胀剂，提高溶液的相分离温度 由聚合物和化合物A组成。解离后，如果需要，提取组分A和/或B。 通过使用无毒物质，例如 作为化合物A的食用油和作为化合物B的蓖麻油，得到无毒且无害的用于医疗领域和食品工业中的物质等。

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