We can expect that the development and application of PP three-layer materials will be of great significance to the development of China's polypropylene industry. But also very important, stationery, food packaging, packaging materials and environmental protection.

The office file disk mainly includes wooden file disk and iron file disk. The office file disk is divided into 3 types (1 layer, 2 layers and 3 layers). New and fashionable, unique design, reflecting office science and technology, making file access easy.