Method for manufacturing a new sound-absorbing and noise-reducing material by using polyimide foam scraps

A method for manufacturing a new sound-absorbing and noise-reducing material by using polyimide foam scraps, wherein the method comprises the following steps:

• step 1) selecting the polyimide foam scraps produced in a process of polyimide foam production, cutting the polyimide foam scraps into particles of different sizes, and screening the particles of different sizes for standby;
• step 2) selecting inorganic additive, and carrying out drying treatment by controlling temperature to 60-100° C. where drying time is 4-8 h for standby;
• step 3) selecting curing agent and catalyst for standby wherein the catalyst is water;
• step 4) selecting the particles of different sizes obtained in step 1), the inorganic additive obtained in step 2), the curing agent and the catalyst described in step 3) according to parts by weight, first, putting the inorganic additive into a mixer, then according to the sizes of particles, putting the polyimide foam particles of different sizes into the mixer, mixing for 1-12 min, injecting the curing agent into the mixer and continue mixing for 20-55 minutes, finally adding the catalyst into the mixer and continue mixing for 10-18 minutes to obtain a mixed material;
• step 5) putting the mixed material into a mold evenly to form a film, and leaving the mold for 8-48 h to form a product;
• step 6) opening the mold, taking out the product, removing burrs, cutting the product according to customer needs, and packing the product in a carton for storage.