1. The technical standard number of felt consists of five digits. The first digit represents the product color; the second digit represents the raw material category; the third digit represents the product specification; the fourth and fifth digits represent the product density. "T" stands for specialty felt. For example, t112-41 refers to special white fine felt with a density of 0.41g/cm3; 122-32 refers to white semi coarse felt with a density of 0.32g/cm3; t112-32-44 refers to special white felt with a density of 0.32g/cm3-0.44g/cm3; t112-41 -- 8mm × 1000mm × 1000mm refers to special white fine wool felt with a density of 0.41g/cm3 and a thickness of 8 Mm, 1000 mm long and 1000 mm wide.
2. When ordering, only the number, thickness and area are required. When ordering felt wheel and felt product parts, the number can be put forward according to the standard, and the part drawing data can be provided at the same time. If there are special requirements for technical specifications of special type felt products, both parties can make a decision through consultation when ordering.