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    Light-occluding and water-permeable sheet
    52.
    发明授权
    Light-occluding and water-permeable sheet 失效
    光照和透光片

    公开(公告)号：US3839139A

    公开(公告)日：1974-10-01

    申请号：US37384573

    申请日：1973-06-26

    Applicant: UNITIKA LTD

    Inventor： ITO K ,  ISHIMOTO A ,  YAMADA Y ,  INOUE H ,  NOZU T

    IPC: A01G13/02 ,  D04H3/16 ,  D04H13/00

    CPC classification number: A01G13/0268 ,  D04H3/16 ,  Y10T428/24355 ,  Y10T428/2443 ,  Y10T428/24826 ,  Y10T428/24893

    Abstract: A light-occluding and water-permeable non-woven sheet suitable for use as a weed growth inhibiting sheet, heat insulating sheet or light-shielding sheet, comprising a non-woven sheet of continuous filaments having a solar ray-absorbing substance such as carbon black contained therein or coated on their surfaces, said non-woven sheet having a light-occluding rate of at least 60 percent, a water-permeability of at least 40 percent and a unit weight of 20 to 200 g/m2.

    Abstract translation: 适合用作杂草生长抑制片，隔热片或遮光片的遮光透水性无纺布片，包括具有太阳能吸收物质如碳的连续长丝的无纺布片 其中所含的黑色或涂在其表面上，所述无纺布片具有至少60％的遮光率，至少40％的透水性和20-200g / m 2的单位面积重量。

    Apparatus for producing undrawn polyamide films having uniform physical characteristics
    53.
    发明授权
    Apparatus for producing undrawn polyamide films having uniform physical characteristics 失效
    生产具有统一物理特性的聚酰胺薄膜的设备

    公开(公告)号：US3788789A

    公开(公告)日：1974-01-29

    申请号：US3788789D

    申请日：1971-10-06

    Applicant: UNITIKA LTD

    Inventor： MATSUMURA W

    IPC: B29C47/88 ,  B29D7/00

    CPC classification number: B29C47/8855 ,  B29C47/0021 ,  B29C47/8845

    Abstract: An improved process for producing undrawn polyamide films having uniform physical characteristics by preventing the formation of deposits of impurities on a formation surface. The molten film is extruded on a rotating roller surface where it is cooled and solidified and drawn off after the surface has traveled a distance substantially less than a whole revolution. There is then positioned a first liquid-removal means, polishing means, washing means, second liquid-removal means and drying means in that order in the direction of rotation of the roller when the surface is not in contact with the film. The polishing means may travel both horizontally across the entire width of the roller surface and vertically along a short portion of the roller surface in reciprocal motion to assist in removing the impurity deposits. The polishing means may be either a roller or shaped to conform to the roller surface and may also contain a suitable abrasive. In addition, the washing liquid may act as a polishing medium and may consist either of water or of an alcohol having one to 10 carbon atoms, or a mixture of both. The step of polishing the roller surface and in the presence of a suitable polishing medium allows significantly increase efficiency.

    Abstract translation: 通过防止在形成表面上形成杂质沉积物来生产具有均匀物理特性的未拉伸聚酰胺薄膜的改进方法。 熔融膜在旋转辊表面上挤出，在其上被冷却和固化，并且在表面行进远远大于一整圈的距离之后被拉出。 然后，当表面不与膜接触时，沿辊的旋转方向依次设置第一液体去除装置，抛光装置，清洗装置，第二除液装置和干燥装置。 抛光装置可以水平地横过辊表面的整个宽度并且沿着往复运动沿辊表面的短部分垂直行进，以帮助去除杂质沉积物。 抛光装置可以是辊或成形为符合辊表面并且还可以包含合适的磨料。 此外，洗涤液可以用作抛光介质，并且可以由水或具有1-10个碳原子的醇组成，或两者的混合物组成。 抛光辊表面并在合适的抛光介质的存在下的步骤允许显着提高效率。

    Process for producing low crimp polyethylene oxybenzoate yarns
    54.
    发明授权
    Process for producing low crimp polyethylene oxybenzoate yarns 失效
    生产低CRYP聚乙烯氧苯甲酸酯纱的方法

    公开(公告)号：US3765069A

    公开(公告)日：1973-10-16

    申请号：US3765069D

    申请日：1971-09-16

    Applicant: UNITIKA LTD

    Inventor： FUJITA S ,  KIMURA H ,  MURAKAMI T ,  ARIMOTO H

    IPC: D01D5/22 ,  D02J1/22

    CPC classification number: D01D5/22

    Abstract: The present invention relates to a process for producing low crimp polyethylene oxybenzoate (hereinafter designated as PEOB) yarns, and more particularly, multifilament yarns having natural silk-like beautiful appearance and excellent feelings which is characterized by heat treating a PEOB drawn yarn having a Beta value of from 20 to 80 and a shrinkage value in boiling water of from 20 to 35 percent under substantially no tension so as to decrease the Beta -value by more than 10.

    Abstract translation: 本发明涉及一种生产低压聚乙烯氧苯甲酸酯（以下称为PEOB）纱线的方法，更具体地说，涉及具有天然丝状美丽外观和优异感觉的复丝纱线，其特征在于热处理具有β - 基本上无张力的20至80的沸点收缩值为20至35％，从而将β值降低10以上。

    Laminated film and method for manufacturing same
    55.
    发明授权
    Laminated film and method for manufacturing same 有权

    公开(公告)号：US12180347B2

    公开(公告)日：2024-12-31

    申请号：US17785564

    申请日：2021-11-16

    Applicant: UNITIKA LTD.

    Inventor： Takashi Okabe ,  Nobuyasu Okumura ,  Kumi Ashihara

    IPC: C08J7/04 ,  B29C48/00 ,  B29C48/08 ,  B29K77/00 ,  B29K105/00 ,  C08K7/26

    Abstract: A laminated film having a resin layer laminated on at least one surface of a base film. The laminated film is characterized by: the base film being a semi-aromatic polyamide film that has been at least uniaxially stretched; the resin layer containing fine particles; the thermal shrinkage factor in the longitudinal direction SMD and the thermal shrinkage factor in the width direction STD of the film measured under conditions of 250° C.×5 minutes each being −1.0 to 1.5%; the tensile elongations at break in the longitudinal direction and in the width direction each being 70% or more; and the haze being 3% or less.

    Production method of maleimide
    59.
    发明授权
    Production method of maleimide 有权

    公开(公告)号：US11958806B2

    公开(公告)日：2024-04-16

    申请号：US17037164

    申请日：2020-09-29

    Applicant: UNITIKA LTD.

    Inventor： Yuki Yamada ,  Tatsuya Morikita ,  Yosuke Sugimoto ,  Takeshi Yoshida ,  Akira Shigeta ,  Yoshiaki Echigo

    IPC: C07D207/448 ,  B01D9/00 ,  B01D11/04 ,  C07C267/00

    CPC classification number: C07D207/448 ,  B01D9/005 ,  B01D11/0492 ,  C07C267/00

    Abstract: An object is to provide a method for easily producing maleimide (MI) in which trace amounts of residual acid components as impurities in a crude MI are efficiently reduced, that is, the acid value is sufficiently reduced.



    A method for producing purified MI, comprising reducing an acid value of crude MI by 50% or more, by adding carbodiimide (CDI) to a solution comprising the crude MI to react an acid component in the crude MI with the CDI.
    The method for producing purified MI, comprising adding 0.5% by mass or more and 8% by mass or less of the CDI with respect to a mass of the crude MI for reaction.
    The method for producing purified MI, wherein the CDI is N,N′-diisopropyl carbodiimide (DIC).
    The method for producing purified MI, comprising removing a urea derivative of the CDI (CDI-U) by-produced when reacting the acid component in the crude MI with the CDI.

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