Coated fibrous web and process for the production thereof
    12.
    发明申请
    Coated fibrous web and process for the production thereof 审中-公开
    涂布纤维网及其生产方法

    公开(公告)号:US20040173329A1

    公开(公告)日:2004-09-09

    申请号:US10475774

    申请日:2004-04-22

    IPC分类号: D21H017/69

    CPC分类号: D21H17/69 D21H11/16 D21H15/12

    摘要: The present invention relates to a coated fibrous web and a method for producing it. According to the present invention, a coated fibrous web comprises a filler-containing base web that has a pigment-containing coating layer on at least one surface. The filler of the base web consists at least partially of cellulose or lignocellulose fibrils, on the surface of which light scattering material particles have been deposited. The filler comprises cellulose or lignocellulose fibrils having an average thickness less than 5 nullm produced from plant fibres by refining and screening. Considerable advantages are achieved with the present invention. With the help of the composite filler, the formation of the fibrous web can be improved significantly without impairing the retention, which makes is possible to achieve an extremely smooth substrate for the coating. The smoothness of the surface can also be improved. Furthermore, the fines-based carrier fraction of the filler compresses the surface of the base paper so that the coating does not penetrate too much into the fibre network. Due to these reasons even a small amount of coating produces good coverage and quality improving cost-efficiency.

    摘要翻译: 本发明涉及涂布纤维网及其制造方法。 根据本发明,涂覆的纤维网包括在至少一个表面上具有含颜料的涂层的含填料的基料网。 基底纤维的填料至少部分由纤维素或木质纤维素原纤维组成,其表面上已沉积有光散射材料颗粒。 填料包括通过精制和筛选从植物纤维产生的平均厚度小于5μm的纤维素或木质纤维素原纤维。 利用本发明实现了相当大的优点。 借助于复合填料,可以显着地改善纤维网的形成,而不损害保留性,这使得可以实现用于涂层的非常光滑的基材。 也可以提高表面的平滑度。 此外,填料的细粉末载体部分会压缩原纸的表面,使得涂层不会太多渗入到纤维网中。 由于这些原因,即使少量的涂层产生良好的覆盖和质量也提高了成本效率。

    Process for continuously producing composite porous flakes
    18.
    发明授权
    Process for continuously producing composite porous flakes 失效
    连续生产复合多孔薄片的方法

    公开(公告)号:US3944639A

    公开(公告)日:1976-03-16

    申请号:US427843

    申请日:1973-12-26

    摘要: A process is disclosed whereby porous flakes usable for making paper-like sheets are produced by melting a 10 to 75 parts by weight of thermoplastic polymer, dispersing 25 to 90 parts by weight of finely divided inorganic particles in a solvent capable of dissolving the polymer in an amount of 80 to 95% based on a total weight of the polymer, the inorganic particles and the solvent, at room temperature or lower to prepare a slurry. At a temperature at which the polymer can be dissolved in the solvent, the polymer melt is mixed with the slurry which has been preliminarily heated to a temperature pertinent for realizing the above-mentioned dissolving temperature when the heated slurry is mixed with the polymer melt, to prepare a uniform dispersion of the inorganic particles in the polymer solution in the solvent and then, the dispersion is spurted from a closed tank through an orifice, into a zone having a temperature and pressure lower than that of the dispersion, whereby the spurted dispersion is converted to composite porous flakes by rapidly evaporating the solvent.

    摘要翻译: 公开了一种可用于制造纸状片材的多孔薄片通过将10至75重量份的热塑性聚合物熔融而制得,将25至90重量份的细碎无机颗粒分散在能够将聚合物溶解的溶剂中 在室温或更低温度下,基于聚合物,无机颗粒和溶剂的总重量,为80至95%的量以制备浆料。 在聚合物可以溶解在溶剂中的温度下,将聚合物熔体与预先加热的浆料混合,使得当加热的浆料与聚合物熔体混合时达到上述溶解温度的温度, 制备无机颗粒在溶剂中的聚合物溶液中的均匀分散体,然后将分散体从封闭的罐通过孔口喷射到温度和压力低于分散体的温度和压力的区域中,由此喷射的分散体 通过快速蒸发溶剂而转化成复合多孔薄片。