Process for the manufacture of tubing having a coating on its inside and
apparatus for carrying out the process
    1.
    发明授权
    Process for the manufacture of tubing having a coating on its inside and apparatus for carrying out the process 失效
    用于制造在其内部具有涂层的管道和用于执行该过程的装置的方法

    公开(公告)号:US4353940A

    公开(公告)日:1982-10-12

    申请号:US247945

    申请日:1981-03-26

    CPC classification number: B05C7/04 B05D7/222 B05D2201/00 B05D7/02 Y10S118/10

    Abstract: A process is disclosed for coating the inside surface of a length of tubing comprising the steps of forming at least one loop of tubing with a downwardly inclined portion and an upwardly inclined portion; filling the cavity of the tubing forming the loop with a coating liquid; transporting the tubing along its longitudinal axis in a substantially vertically upward direction to coat the inside of the tubing above the level of the coating liquid with an initial layer of coating liquid; constricting the tubing adjacent to and above the level of the coating liquid along a constriction zone transverse to the longitudinal axis of the tubing, the constriction zone progressively diminishing in width in the direction of travel of the tubing to reduce the thickness of the initial layer and form a thin layer of desired thickness on the inside of the tubing issuing from the constriction zone; filling the cavity of the tubing issuing from the metering device with support gas; and exposing the tubing to heat at a sufficient temperature to fuse the coating layer to the inside of the tubing and form an uninterrupted film of uniform thickness thereon. The coating liquid can comprise an aqueous polymeric dispersion containing at least about 15% by weight of dispersed polymer based on the total weight of the dispersion and preferrably in the range of about 15 to 60% by weight. Also disclosed is an apparatus for carrying out the process of the present invention.

    Abstract translation: 公开了一种用于涂覆一段管道的内表面的方法,包括以下步骤:形成具有向下倾斜部分和向上倾斜部分的管道的至少一个环路; 用涂布液填充形成环的管的空腔; 沿着其纵向轴线沿着基本上垂直向上的方向输送管道,以用涂覆液体的初始层涂覆在涂层液体的上方的管道内部; 沿着与管道的纵向轴线相邻的收缩区域收缩与涂层液体相邻并高于涂层液体的管道,收缩区域在管道行进方向上的宽度逐渐减小,以减小初始层的厚度,并且 在从收缩区发出的管道的内侧上形成所需厚度的薄层; 用支撑气体填充从计量装置发出的管道的腔; 并将管道暴露于足够温度下加热以将涂层熔合到管道内部,并在其上形成均匀厚度的不间断膜。 涂布液体可以包含基于分散体总重量至少约15重量%的分散聚合物的水性聚合物分散体,优选在约15至60重量%的范围内。 还公开了一种用于实施本发明的方法的装置。

    Porous shaped article of regenerated cellulose adapted for medical use
    3.
    发明授权
    Porous shaped article of regenerated cellulose adapted for medical use 失效
    适用于医疗用途的再生纤维的多孔成型制品

    公开(公告)号:US4198968A

    公开(公告)日:1980-04-22

    申请号:US878455

    申请日:1978-02-16

    CPC classification number: A61L15/425 A61L15/28

    Abstract: A porous shaped article adapted for medicinal use is disclosed which comprises a porous regenerated cellulose the entire surface of which is covered with a coating comprising a hydrophilizingly effective amount of at least one wetting agent and a substantially water insoluble chemically modified cellulose ether which is crosslinked carboxymethylcellulose or a reaction product of a partially etherified cellulose and a chemical modifying agent which is capable of reacting with the free hydroxy groups of the etherified cellulose.The articles are coated by first impregnating same with a cellulose ether solution and then treating the impregnated article with a solution of the modifying agent. The wetting agent may be added to either of these steps.The coated articles retain a high absorption capacity for liquids, yet do not release any substantial amounts of turbidifying impurities into a surrounding liquid and therefore are especially suited for medical uses.

    Abstract translation: 公开了一种适于药用的多孔成形制品,其包括多孔再生纤维素,其整个表面覆盖有包含亲水有效量的至少一种润湿剂和基本上不溶于水的化学改性的纤维素醚的涂层,其是交联的羧甲基纤维素 或部分醚化的纤维素和能够与醚化的纤维素的游离羟基反应的化学改性剂的反应产物。 首先用纤维素醚溶液浸渍制品,然后用改性剂的溶液处理浸渍的物品来涂覆制品。 润湿剂可以加入到这些步骤中的任一个中。 涂覆制品对液体保持高吸收能力,但不会将任何大量的浊化杂质释放到周围液体中,因此特别适用于医疗用途。

    Process for the manufacture of tubing based on cellulose hydrate having
a coating on its inside and apparatus for carrying out the process
    4.
    发明授权
    Process for the manufacture of tubing based on cellulose hydrate having a coating on its inside and apparatus for carrying out the process 失效
    用于制造基于其内部具有涂层的水合氧化物的管道的方法以及用于进行该方法的装置

    公开(公告)号:US4353939A

    公开(公告)日:1982-10-12

    申请号:US247933

    申请日:1981-03-26

    CPC classification number: B05C7/04 A22C13/00 B05D7/222 B05D2201/00 Y10S118/10

    Abstract: Disclosed is a process for coating the inside of a length of tubing comprising the steps of forming at least one loop of tubing with a downwardly inclined portion and an upwardly inclined portion; filling the cavity of the tubing forming the loop with a coating liquid; transporting the tubing along its longitudinal axis in a substantially vertically upward direction to coat the inside surface of the tubing above the level of the coating liquid with an initial layer of coating liquid; constricting the tubing adjacent to and above the level of the coating liquid with a metering device having a constriction zone which flattens a portion of the tubing passing therethrough to substantially eliminate all of the initial layer thereon and partially flattens the remaining portion of the tubing to allow a desired quantity of coating liquid to remain on the tubing issuing from the constriction zone; filling the cavity of the tubing issuing from the constriction zone with support gas; and, exposing the tubing to the action of heat at a sufficiently high temperature to fuse the coating layer to the inside thereof and form an uninterrupted film. Also disclosed is an apparatus for carrying out the process.

    Abstract translation: 公开了一种用于涂覆一段管道的内部的方法,包括以下步骤:形成具有向下倾斜部分和向上倾斜部分的管道的至少一个环; 用涂布液填充形成环的管的空腔; 沿着其纵向轴线沿着基本垂直向上的方向输送管道,以用涂覆液体的初始层涂覆管线的上表面以上的涂层液体的上表面; 通过具有收缩区域的计量装置收缩邻近的涂层液体的管道,该收缩区域使通过其的管道的一部分平坦化,以基本上消除其上的所有初始层,并部分地平坦化管道的剩余部分,以允许 所需数量的涂覆液体保留在从收缩区域发出的管道上; 用支撑气体填充从收缩区发出的管道的腔; 并且在足够高的温度下将管暴露于热作用下,以将涂层熔化到其内部并形成不间断的膜。 还公开了一种用于执行该过程的装置。

Patent Agency Ranking