Compound film bags between the warp and weft structure is tight, small gaps, while the coated bags between the warp and weft structure is loose, large gaps. In the physical indicators and performance, compound film bags and coated bags, compared with a number of significant advantages, compound film bags are currently the best bags for cement production, and therefore favoured by a large number of cement production enterprises. I hope that the cement production enterprises in the choice of bag manufacturers to be careful, do not be a few unscrupulous traders or manufacturers deceived, and do not let your corporate image and product quality because of the use of unqualified bags and be adversely affected.