Patent ID: 8161716

Claim:
A packing method for a filter tow bale in which filter tow is compressed and packed with a compressing device including an upper press base and a lower press base to manufacture the filter tow bale, comprising steps of: (a) setting a top-side film on a compression surface of the upper press base, setting a bottom-side film on a compression surface of the lower press base, and feeding the filter tow between the compression surface of the upper press base and the compression surface of the lower press base; (b) compressing the filter tow with a pressure of 100 t/m 2 or more by said upper press base and said lower press base, by making the distance between said upper press base and said lower press base smaller than a desired height of the finished bale by 50 to 250 mm, so as to form a pressed bale having the packing density of 450 to 1200 kg/m 3 ; (c) packaging the pressed bale with the top-side film and the bottom-side film and then sealing the top-side film and the bottom-side film to each other in an airtight state; (d) increasing a distance between said upper press base and said lower press base of the steps (b) and (c) by a range of 50 to 250 mm at the moving speed of 10 to 50 mm/sec so as to expand the pressed bale; and (e) releasing the compression pressure applied on the pressed bale after the sealing.