Method for preparation of fibrils
    2.
    发明授权
    Method for preparation of fibrils 失效
    原纤维的制备方法

    公开(公告)号:US4237081A

    公开(公告)日:1980-12-02

    申请号:US892799

    申请日:1978-04-03

    IPC分类号: D01D5/18 D01D5/40 B24D3/00

    CPC分类号: D01D5/18 D01D5/40

    摘要: Apparatus useful in the manufacture of thermoplastic Olefin polymer fibrils are prepared by a process carried out in a disc mill. A hot olefin polymer solution is fed into the working cavity defined by the discs. In passing through the working cavity, the hot polymer solution is broken up into a plurality of uniaxially-oriented liquid streams which follow tortuous liquid paths through the working cavity whereby each of the streams is attenuated to orient the solute polymer molecules in said streams. A coolant liquid is fed into the working cavity and cools the attenuated polymer streams to a temperature sufficiently low so that substantially all of the solute polymer is precipitated in the form of uniaxially-oriented polymer fibrils. The product recovered from the modified disc mill consists of a mixture of uniaxially-oriented polymer fibrils, polymer solvent, and coolant liquid. The fibrils are recovered and refined in subsequent downstream operations.

    摘要翻译: 用于制造热塑性烯烃聚合物原纤维的装置通过在圆盘磨机中进行的方法制备。 将热烯烃聚合物溶液进料到由盘限定的工作空腔中。 在通过工作空腔之后,热聚合物溶液被分解成多个单向取向的液体流,其沿着曲折的液体路径穿过工作空腔,由此每个流被减弱以使所述流中的溶质聚合物分子定向。 将冷却剂液体进料到工作空腔中并将减弱的聚合物流冷却到足够低的温度,使得基本上所有的溶质聚合物以单轴取向的聚合物原纤维的形式沉淀。 从改性盘磨机回收的产物由单轴取向聚合物原纤维,聚合物溶剂和冷却剂液体的混合物组成。 在随后的下游操作中回收和精制原纤维。

    Paper products
    3.
    发明授权
    Paper products 失效
    纸制品

    公开(公告)号:US4274917A

    公开(公告)日:1981-06-23

    申请号:US16060

    申请日:1979-02-28

    IPC分类号: D21H13/14 D01D5/18 D21H5/12

    CPC分类号: D21H5/202 D21H13/14

    摘要: Paper having improved properties, particularly tear strength, is prepared from a furnish containing at least 90 weight % of cellulose fibers and up to 10 weight % of olefin polymer fibrils. The fibrils are prepared by a differential temperature process of the type described in U.S. Pat. No. 4,013,751, are refined in isopropanol, and are treated with an aqueous solution of polyvinyl alcohol to sorb at least 1.0 weight % of polyvinyl alcohol on the fibrils. The fibrils are prepared from an olefin polymer having a weight average molecular weight of at least one (1) million.

    摘要翻译: 具有改善性能,特别是撕裂强度的纸由含有至少90重量%的纤维素纤维和至多10重量%的烯烃聚合物原纤的配料制备。 原纤维通过美国专利No. 在异丙醇中精炼,并用聚乙烯醇水溶液处理以吸附原纤上至少1.0重量%的聚乙烯醇。 原纤维由重均分子量为至少一(1)百万的烯烃聚合物制备。