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    • 57. 发明授权
    • Nonwoven fabric-like product using a bacterial cellulose binder and
method for its preparation
    • 使用细菌纤维素粘合剂的非织造织物产品及其制备方法
    • US4919753A
    • 1990-04-24
    • US299691
    • 1989-01-23
    • Donald C. JohnsonAmar N. Neogi
    • Donald C. JohnsonAmar N. Neogi
    • C12P19/04D21H17/25
    • C12P19/04D21H17/25
    • The present invention is a method of bonding a fibrous wet laid nonwoven fabric-like product using bacterial cellulose as a binder. The bacterial cellulose most useful for the invention is the type formed in an agitated culture. Microorganisms of the genus Acetobacter which are genetically adapted to be good cellulose producers under agitated conditions are preferred cellulose producers. From 1-30% of the bacterial cellulose may be added to a water slurry of other sheet forming fibers as a binder. Preferably 20% or less bacterial cellulose is used since higher amounts retard drainage rates significantly. Bacterial cellulose conveys many desirable properties such as excellent hydrophilicity with low air porosity and high tensile index. It may be used in many cases as a total replacement for the latex binders now used for manufacture of nonwoven fabrics. Bacterial cellulose is especially well adapted for the manufacture of pattern bonded sheets.
    • 本发明是使用细菌纤维素作为粘合剂粘结纤维状湿法无纺布状制品的方法。 对于本发明最有用的细菌纤维是在搅拌培养物中形成的类型。 在搅拌条件下遗传适应成为良好纤维素生产者的醋杆菌属的微生物是优选的纤维素生产者。 可以将1-30%的细菌纤维素加入作为粘合剂的其它成形纤维的水浆中。 优选使用20%以下的细菌纤维素,因为更高的量显着地延缓引流速率。 细菌纤维素具有很好的性能,例如具有低空气孔隙率和高拉伸指数的优良亲水性。 在许多情况下,它可以用作现在用于制造非织造织物的胶乳粘合剂的总体替代物。 细菌纤维素特别适用于制造图案粘合片。
    • 59. 发明授权
    • Method to produce a composite contact lens
    • 生产复合隐形眼镜的方法
    • US4121885A
    • 1978-10-24
    • US723944
    • 1976-09-16
    • Charles E. EricksonAmar N. Neogi
    • Charles E. EricksonAmar N. Neogi
    • B29D11/00G02B1/04G02C7/04
    • B29D11/00048G02B1/043G02C7/049
    • A new concept in polymeric prosthetic devices having a portion thereof composed of a hydrophilic polymer is described herein in which distortions and stresses upon the device due to water absorption are minimized or eliminated. Physical properties of the various portions of the device may thus be varied to provide the particular physical parameters required. Compositions of matter and methods of manufacturing the novel prosthetic devices are described. The composition of matter is a polymer which includes a water soluble solid inert substance removable by exposure to water during hydration of the hydrophilic portion of the device, thus eliminating distortions and stresses therein. The hydrophilic polymer described is useful, for example, as one component part of such prosthetic devices as a hard-soft contact lens, cardiovascular implants, etc. useful in aqueous environment wherein stress and deformation of the polymer shape due to hydration must be minimized.
    • 本文描述了具有由亲水性聚合物组成的部分的聚合物修复装置中的新概念,其中由于吸水而使装置上的变形和应力最小化或消除。 因此可以改变装置的各个部分的物理性质以提供所需的特定物理参数。 描述了物质的组成和制造新型假体装置的方法。 物质的组成是一种聚合物,其包括在装置的亲水部分水合期间通过暴露于水而可去除的水溶性固体惰性物质,从而消除其中的变形和应力。 所描述的亲水性聚合物可用作例如可用于水溶液环境中的硬质隐形眼镜,心血管植入物等这样的假体装置的一个组成部分,其中由于水合而使聚合物形状的应力和变形必须最小化。