METHOD FOR MANUFACTURING NON-WOVEN COMPOSITE LAYER PRODUCT WITH DIFFERENT HARDNESSES

Disclosed is a method for manufacturing a non-woven composite layer product with different hardnesses, the non-woven composite layer product at least consisting of a hard layer with a thickness of between 2-7 mm and a weight of between 600-1200 g/m2, and a soft layer with a thickness of between 15-40 mm and a weight of between 600-1200 g/m2. The manufacturing method mainly comprises the steps of: sticking at least a first non-woven material to be pre-formed into a hard layer and a second non-woven material to be pre-formed into a soft layer to become an intermediate, and then feeding the intermediate into a baking oven at a constant temperature to heat at a heating temperature of 180±20°C over a duration of longer than at least 200 seconds (inclusive), such that the first non-woven material and the second non-woven material are fully heated to softening, and the contact surfaces are bound by hot melting; and then feeding into a mold with different material thicknesses for a one-time hot-press molding, so as to obtain a non-woven composite layer product containing a hard layer and a soft layer with required specifications.