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Any Bulk bag, may be laminated or unlaminated cannot guarantee a 100% contamination free handling unless it is safe guarded with the Sift proof Seams. Also very popularly known as the Dust proof Seams, it is made of a special material called yarn?(polypropylene only).This fluffy material is put in the filler cord machines to make the filler cord, which is then stitched in the side, top or bottom seams of the bulk bags.These Sift proof seams may broadly be of three types, depending on the application of the FIBCs:
Single sift proof seams
Double sift proof seams
Triple sift proof seams
