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Making of Thread
Bag closing thread is widely made with spun polyester filament and these strands of filament are twisted to form one homogeneous thread. The number of strands used can vary depending on the application for example 12/5 means a filament that is 12's count that is folded 5 times (count is the measure of thickness, smaller the number thicker the thread – 12s count is finer than 10s count).