12.07.2010

The Factors Affecting Static Electric

    Object Type

        Some objects are more ready for charging. Because of the place of the materials in the triboelectrification series, charging is changing from one material to another one and decided whether they are negative or positive.

    Humidity

        Generally, dry air is suitable for high charging, but if there is high humidity around environment, it causes low static charging. Water is a better conductor than plastic. Atmospheric humidity creates liquids on the surfaces and for this reason electrical charges want to go to the earth by using these liquids.

    Repetition

        Repetitive functions such as friction or isolation will redound the charging level of the object. For example, a plastic moving on the teflon cylinder, surface charges increase while it is touring.

    Battery Effect


        Connection kinds of the charged materials causes magnificant electrical charging. For example, plastic sheets having lower charge density can generate high voltages while forming a stack.

    Heat Changing


        An object which becomes cold wants to generate electric.In fact, all of the object loads a net electrical charge. If the object is a good insulator, it can protect the internal static charge for a long time. Furthermore this static charge flows until becoming a surface static charge. Injection molding is another example that is neutral while it is hot but when it is cold, it has alarge surface charge

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