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PE & PP Resins - The Association of Postconsumer Plastic Recyclers
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日期：2025-06-26
custom description for seo ... Polyethylene (PE) and polypropylene (PP) are two of the most widely used plastics in the world. They are typically grouped together because they are both in the “polyolefin” family of materials; chemists refer to ethylene an...看更多
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