HL3500 Color woven bag pp material granule spot take sample without calcium carbonate polyethylene scale

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PP is a crystalline high polymer, and the comprehensive performance of PP is better than that of PE material. PP products are light in weight, good in toughness and good in chemical resistance. Disadvantages of PP: low dimensional accuracy, insufficient rigidity, poor weather resistance, it has post-shrinkage phenomenon, and after demoulding, it is easy to age, become brittle, and easy to deform. In daily life, commonly used fresh-keeping boxes are made of PP materials.