TH23158U - A method to convert a q-ary symmetric channel to an erasure channel with a precise erasure marker to reduce decoding complexity. - Google Patents

Claims (2)

(OCR)------------------ 1. The process of producing temperature-sensitive color-changing composite filament from bioplastics and thermochromic powder for 3D printing involves the following steps: a. Preparing the thermochromic powder: The thermochromic powder is ground into a fine powder and sieved through a fine mesh to obtain a particle size of 40-45 mesh. b. Drying the sieved thermochromic powder at 60-80 degrees Celsius for 12-24 hours. c. Preparing the bioplastics: Polylactic acid bioplastics are dried at 60-80 degrees Celsius for 12-24 hours. d. Preparing the masterbatch. (Masterbatch) Bioplastics, specifically polylactic acid pellets (dried in step A), and thermochromic powder (dried in step B) are mixed in a ratio of 90-99% by weight of polylactic acid pellets to 1-10% by weight of thermochromic powder. This mixture is then molded using a twin-screw extruder at a temperature of 150-190 degrees Celsius, an extrusion screw speed of 60-70 revolutions per minute, and a cutting speed of 40-50 revolutions per minute. The resulting masterbatch is then used... (Masterbatch) obtained from step d. is heat-dried at a temperature of 60-80 degrees Celsius for 12-24 hours. f. Prepare temperature-sensitive color-changing composite filaments by mixing the dried polylactic acid bioplastics from step c and the dried masterbatch from step e in a ratio of 96-99% by weight of polylactic acid bioplastics to 1-4% by weight of masterbatch. This mixture is then molded using a single-screw extruder at a temperature of 170-190 degrees Celsius, an extrusion screw speed of 60-80 revolutions per minute, and a winding speed of 25-50 meters per minute. The result is temperature-sensitive color-changing composite filaments made from bioplastics. Bioplastics and thermochromic powder. 2. The process for producing temperature-sensitive composite filaments from bioplastics and thermochromic powder for use in 3D printing, as per claim 1, which includes the following steps: shaping the temperature-sensitive composite filaments from bioplastics and thermochromic powder obtained from claim f into a workpiece using a 3D printer, with a printing temperature of 190-220°C and a bed temperature of 50-60°C.