CONDUCTIVE BIG BAG CONTROL PROCEDURE  

The conductive big bag types produced in DEBANT and their measurement and control mechanism is as follows:

TYPE A: These type of big bags are normal big bags for which conductivity is not a requested property. Conductivity measurements and controls are not made for Type A big bags.

TYPE B: Type B big bags are conductive big bags with a thinner coating than other big bags. Coating thickness should not exceed 20 gr/m2 for Type B big bags while standard coating thickness is 30 gr/m2 for other big bags. Type B big bags’ conductivity measurements are 100% done by controlling coating thickness of the fabric. Every fabric roll has a roll number and the coating thickness for each roll is recorded.

TYPE C: This type of big bags are conductive big bags which should be grounded. There are conductive threads in the fabric of Type C big bags. The operation plans of these big bags are prepared to provide the conductivity of the big bag and the big bags are prepared by considering these plans. There are one or two grounding loops on Type C big bags. When Type C big bags are manufactured the resistivity between body-discharge spout-filling spout- webbings and grounding loop of each bag is measured. The average of these resistivity measures for one big bag should be less than 10 8 ohms. This measurement is made with an ohm-meter. Every big bag has a pin code. Conductivity measurement is 100% made for Type C bags and the measured values are recorded in Measurement Control Forms.

TYPE D: This is also a conductive big bag which does not need to be grounded. The bag discharges itself to the air. There are conductive tapes in the fabric. The resistivity of every Type D fabric roll is measured with a terra-ohmmeter and the resistivity of the Type D fabric is required to be more than 10 8 ohms. Every fabric roll has a roll number the resistivity values are recorded for each roll. If the fabric does not require these conditions the fabric can not be used as Type D fabric.