▎ 摘　　要

NOVELTY - Polyvinyl chloride film with high thermal stability comprises 65-75 pts. wt. polyvinyl chloride substrate, 15-25 pts. wt. filling dispersing agent, 5-10 pts. wt. enhanced auxiliary agent, 1-5 pts wt. polyacrylamide, 5-10 pts. wt. calcium carbonate, where the filling dispersing agent is prepared by mixing pentaerythritol polyether tetraalcohol, methacrylic acid ethylene oxidic ester according to weight ratio of 5:1 to mix, then sending into the four-mouth flask to react for 10-20 minutes, the reaction temperature is 55-75?oC, then adding glacial acetic acid to adjust the pH to 5.0, then ultrasonically dispersing for 10-20 minutes, then standing and aging for 10-20 minutes, then adding 4-8 % cobalt naphthenate catalyst total amount of pentaerythritol polyether tetraalcohol. USE - Polyvinyl chloride film with high thermal stability. ADVANTAGE - The polyvinyl chloride film with high thermal stability enhances the thermal stability of the product. DETAILED DESCRIPTION - Polyvinyl chloride film with high thermal stability comprises 65-75 pts. wt. polyvinyl chloride substrate, 15-25 pts. wt. filling dispersing agent, 5-10 pts. wt. enhanced auxiliary agent, 1-5 pts wt. polyacrylamide, 5-10 pts. wt. calcium carbonate, where the filling dispersing agent is prepared by mixing pentaerythritol polyether tetraalcohol, methacrylic acid ethylene oxidic ester according to weight ratio of 5:1 to mix, then sending into the four-mouth flask to react for 10-20 minutes, the reaction temperature is 55-75degrees Celsius, then adding glacial acetic acid to adjust the pH to 5.0, then ultrasonically dispersing for 10-20 minutes, then standing and aging for 10-20 minutes, then adding 4-8 % cobalt naphthenate catalyst total amount of pentaerythritol polyether tetraalcohol, then stirring, stirring speed is 500-700r/minutes, stirring for 20-30 minutes, then washing, centrifuging, drying to obtain the product, then adding to the acetone solvent to disperse, dispersing speed is 200-240r/minutes, the dispersing time is 20-30 minutes, dispersing is finished, obtaining the dispersion medium, sending the stable filling agent into the dispersion medium for low-speed stirring, stirring speed is 50-100 r/minutes, the stirring time is 10-20 minutes, then continuously stirring for 20-30 minutes at the rotating speed of 500-1000r/minutes. An INDEPENDENT CLAIM is included for a method for preparing a high thermal stability polyvinyl chloride film, involving: adding matrix, filling dispersing agent, enhancing auxiliary agent, polyacrylamide, calcium carbonate into the stirrer to stir, stirring speed is 500r/minutes, stirring for 20 minutes, then into the double-screw extruder for extruding, the extruding temperature is 110-170degrees Celsius, then hot pressing is film, the hot pressing pressure is 1-3 megaPascal, the hot pressing temperature is 110degrees Celsius.