Plastics are a wide range of synthetic or semisynthetic materials composed primarily of polymers. Their defining characteristic, plasticity, allows them to be molded, extruded, or pressed into a …

2025年11月19日 · plastic, polymeric material that has the capability of being molded or shaped, usually by the application of heat and pressure.

2025年10月31日 · Plastic products are generally versatile, durable and lightweight. Plastic products are prominent in the construction, transportation, and packaging industries. Plastic …

2025年12月4日 · UNEP supports governments, businesses, financial institutions, and other stakeholders in driving a just transition to a circular economy for plastics, helping to reduce …

2025年8月26日 · Plastic coverage from Scientific American, featuring news and articles about advances in the field.

Plastic is a word that originally meant “pliable and easily shaped.” It only recently became a name for a category of materials called polymers. The word polymer means “of many parts,” and …

A plastic grocery bag has been found in the Mariana Trench - the deepest point in the ocean, and without urgent action, the estimated 11 million metric tons of plastic currently entering the …

2023年9月26日 · Global plastics production Annual production of polymer resin and fibers.

2023年4月21日 · Plastic is a synthetic polymer made from various organic materials that can be molded into almost any shape. Some types of plastic are clear and transparent, like that used in …

The meaning of PLASTIC is a plastic substance; specifically : any of numerous organic synthetic or processed materials that are mostly thermoplastic or thermosetting polymers of high …