Polyoxymethylene, also known as POM (short for polyoxymethylene) or SAE steel, is a thermoplastic engineering plastic obtained by polymerization of formaldehyde and other raw materials. POM-H (polyoxymethylene homopolymer) and POM-K (polyoxymethylene copolymer) are high-density, high-crystallinity materials. They possess excellent physical, mechanical, and chemical properties, particularly in certain aspects. POM is a non-side-chain high-density crystalline polymer with comprehensive properties. It is a smooth, glossy, hard, and dense material in pale yellow or white, suitable for long-term use within a temperature range of -40 to 100°C. Its properties and self-lubricity also surpass most engineering plastics, along with good oil and peroxide resistance. However, it is not resistant to acids, strong alkalis, and ultraviolet radiation.Polyoxymethylene can also be used in fire-resistant firefighting water, pen barrels and caps, toy combs, zippers, eyeliner pencils, and various other consumer goods.