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When assessing the physical strength traits of original and recovered plastic granules, several key differences emerge that play a crucial role in their performance in manufacturing and end use.

Primary granules, originating in unprocessed hydrocarbon raw materials, generally show uniform response under stress. They possess a controlled macromolecular architecture, تولید کننده گرانول بازیافتی very low levels of foreign matter, and precisely formulated stabilizers, resulting in higher tensile strength, elongation at break, and superior shock absorption.

These traits make newly manufactured granules ideal for applications requiring high reliability such as medical devices, safety-critical car parts, and pharmaceutical blister packs.

Reprocessed pellets, on the other hand, are formed by reclaiming discarded polymers from households or factories. While they offer sustainability advantages and cost reductions, their mechanical resilience are consistently lower compared to virgin material. Repeated thermal cycles during recycling can cause molecular breakdown, diminishing polymer size, and causing weakened structural integrity and ductility. Impurities including debris, incompatible resins, or leftover chemicals may also disrupt polymer bonding.

Consequently, secondary polymers tend to be fragile under stress, with reduced elongation and shock absorption capability.

The level of mechanical reduction depends on the specific thermoplastic, the recycling process, and the number of times the material has been reprocessed. As an illustration, polyethylene terephthalate (PET) and polypropylene (PP) can stay functional after reuse after a limited number of cycles, especially when properly sorted and cleaned. In contrast, materials like polystyrene (PS) or polyvinyl chloride (PVC) often degrade significantly with reuse.

To mitigate these losses, producers often combine recycled granules with a percentage of virgin material. This dual-material method can optimize budget constraints while meeting technical specs. Chemical enhancers like antioxidants, coupling agents, or glass fibers can also be added to improve the performance of reclaimed polymers.

In essence, while virgin granules offer superior and more consistent mechanical performance, secondary polymers are advancing technologically and are gaining acceptance in less demanding uses. Selecting between virgin and recycled should be influenced by functional needs, sustainability goals, and acceptable trade-offs in performance. As purification and reformation techniques evolve, the difference in performance is shrinking, enhancing the appeal of secondary polymers across numerous product categories.