Plasticizer formula for hot melting process of partially alcoholized polyvinyl alcohol and process

The invention discloses a plasticizer formula for a hot melting process of partially alcoholized polyvinyl alcohol and a process. The plasticizer formula consists of 25-50wt% of chemically modified plasticizer and 50-75wt% of physically organic plasticizer which are composited. 5-30wt% of composite plasticizer is co-mixed with polyvinyl alcohol at a high speed, and the mixture is swelled and plastified for 4-24 hours in vacuum at 30-80 DEG C for thermoplastic processing. The plasticizer used in the invention plastifies and modifies PVA (Polyvinyl Alcohol), so that the alcoholysis degree of molecular chains of PVA is increased, while other radicals are not introduced to the molecular chain. The plastifying method is of less impact on own performance of PVA. In addition, according to the plastifying method disclosed by the invention, the processing temperature of PVA is extremely reduced, and the processing rheological property is remarkably improved, so that thermoplastic processing at a lower temperature of PVA is realized, and the PVA thin film or sheet prepared is good in transparency and excellent in mechanical property.