Polypropylene resins serve as the foundational raw material for producing these industrial sacks. High-grade thermoplastic polymer granules are melted down, extruded into flat thin sheets, and then slit into fine continuous tapes. These polymer strands undergo a stretching process to align their molecular structures, significantly enhancing tensile strength and tear resistance. Once stretched, the synthetic tapes are tightly woven using circular looms to form a seamless, continuous tubular fabric. This woven material is subsequently cut to precise lengths, folded at the base, and stitched securely to create robust containers suitable for heavy bulk applications across global trade.
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