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10 条记录 (耗时 0.018 秒)

    Photoconductive polyimide coating upon a substrate
    1.
    发明授权
    Photoconductive polyimide coating upon a substrate 失效
    导电聚酰亚胺涂层在基材上

    公开(公告)号：US4363860A

    公开(公告)日：1982-12-14

    申请号：US271223

    申请日：1981-06-08

    申请人： Jan van Turnhout ,  Ramesh C. Ahuja

    发明人： Jan van Turnhout ,  Ramesh C. Ahuja

    IPC分类号： G03G5/00 ,  G03G5/05 ,  G03G5/06 ,  G03G5/07

    CPC分类号： G03G5/0618 ,  G03G5/0571 ,  G03G5/076 ,  Y10S430/10 ,  Y10S430/104

    摘要： A photoconductive layer is produced upon a substrate by coating the substrate with a solution in an organic solvent of a polyamic acid and of 2,4,7-trinitro-9-fluorenone (TNF) and/or 2,4,5,7-tetranitro-9-fluorenone and heating the coated substrate at a temperature not exceeding 150.degree. C. to form on the substrate a polyimide coating containing the said fluorenone compound as a photosensitizer.

    摘要翻译： 通过用聚酰胺酸的有机溶剂和2,4,7-三硝基-9-芴酮（TNF）和/或2,4,5,7-四甲基芴酮的有机溶剂中的溶液涂布基底，在基底上产生光电导层。 四硝基-9-芴酮，并在不超过150℃的温度下加热涂覆的基材，以在基材上形成含有所述芴酮化合物作为光敏剂的聚酰亚胺涂层。

    Process for producing a photoconductive polyimide coating upon a substrate
    2.
    发明授权
    Process for producing a photoconductive polyimide coating upon a substrate 失效
    在基材上制造光导聚酰亚胺涂层的方法

    公开(公告)号：US4355089A

    公开(公告)日：1982-10-19

    申请号：US931919

    申请日：1978-08-08

    申请人： Jan van Turnhout ,  Ramesh C. Ahuja

    发明人： Jan van Turnhout ,  Ramesh C. Ahuja

    IPC分类号： G03G5/00 ,  G03G5/05 ,  G03G5/06 ,  G03G5/07 ,  C08G63/04

    CPC分类号： G03G5/0618 ,  G03G5/0571 ,  G03G5/076 ,  Y10S430/10 ,  Y10S430/104

    摘要： A photoconductive layer is produced upon a substrate by coating the substrate with a solution in an organic solvent of a polyamic acid and of 2,4,7-trinitro-9-fluorenone (TNF) and/or 2,3,4,7-tetranitro-9-fluorenone and heating the coated substrate at a temperature not exceeding 150.degree. C. to form on the substrate a polyimide coating containing the said fluorenone compound as a photosensitizer.

    摘要翻译： 通过用聚酰胺酸的有机溶剂和2,4,7-三硝基-9-芴酮（TNF）和/或2,3,4,7-三甲基芴酮的有机溶剂中的溶液涂布基底，在基底上产生光电导层。 四硝基-9-芴酮，并在不超过150℃的温度下加热涂覆的基材，以在基材上形成含有所述芴酮化合物作为光敏剂的聚酰亚胺涂层。

    Method of manufacturing a homopolar electret from a foil
    9.
    发明授权
    Method of manufacturing a homopolar electret from a foil 失效
    从箔制造单极驻极体的方法

    公开(公告)号：US4037310A

    公开(公告)日：1977-07-26

    申请号：US558936

    申请日：1975-03-17

    申请人： Jan van Turnhout

    发明人： Jan van Turnhout

    IPC分类号： H04R19/00 ,  H01G7/02 ,  B05D5/12

    CPC分类号： H01G7/023 ,  Y10T29/49226

    摘要： A method of manufacturing a homopolar electret from a foil of a non-polar polymer, preferably TEFLON-FEP or PFA. The polymer foil is formed into an electret by heating it above the transition temperature and below the melting temperature of the polymer under the influence of an electrostatic field of a magnitude such that a homopolar charge is injected into the foil which is greater than the desired value, and the foil then being cooled to room temperature. However, before the transition temperature is reached during cooling, the electrostatic field is switched off so that the charge surplus is thereby removed.If the foil is disposed between two electrodes, a better result can be obtained by providing the foil with a vacuum-deposited metal layer in contact with the positive electrode during the formation.The charging time lies between 0.02 secs. and 1 min. and is preferably smaller than 5 secs.

    摘要翻译： 由非极性聚合物的箔，优选TEFLON-FEP或PFA制造单极驻极体的方法。 聚合物箔通过将其加热到高于转变温度并低于聚合物的熔融温度的静电场的作用下形成驻极体，该静电场的大小使得将均相电荷注入箔中，该电压大于所需值 ，然后将箔冷却至室温。 然而，在冷却期间达到转变温度之前，静电场被切断，从而去除电荷剩余。