The choice of felt is also different Felt products according to use， type and nature of the different ingredients of raw materials have different requirements. Such as： filter felts require filtration efficiency in the filtration of gasoline， do not hair loss. Therefore， there is no dead hair mixed ingredients required， low rate of impurities， wool fiber fine， curly high， good down-shining. Another example， the shoes felt is used to pad cotton soles or cotton shoes used to do. Felt warm felt good， low prices， but the color is not demanding. Therefore， the choice of mixed ingredients， regardless of color， regardless of color， black hair can be white， generally with a variety of miscellaneous hair to produce.
　　Strive for low-cost wool fiber generally accounts for 80-85% of the total cost of production. Therefore， the composition of the ingredients to determine the greater impact on the cost of production， to ensure product quality， the choice of raw materials of lower grade， and as far as possible selection of recycled wool， recycled wool and other raw materials， so not only reduce costs， but also Expand raw material resources to solve the problem of insufficient raw materials for blankets.