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Chemical bags could be made of polypropylene woven fabric only, but for those chemical material which needs to be stored or transported under dry and leakage-proof conditions, Kraft paper laminated woven pp bags would be a more suitable packaging material choice.
PP woven bags are widely used in the packaging industry because of their low price and good tear resistance. However, it is not moisture-proof, and it has the disadvantage of being easy to leak powdery substances. Kraft paper has the characteristics of non-toxic, easy to print and moisture-proof, making it one of the long-established and widely used packaging materials, but the kraft paper bag has poor barrier properties and low mechanical strength. The combination of kraft paper and PP woven fabric can give full play to the advantages of both, and offer a moisture-proof and strong material which is suitable for packaging various solid and powdery substances.