| 摘要 |
The present invention relates to a method for manufacturing a degradable thermoplastic packaging film. The method for manufacturing a degradable thermoplastic packaging film of the present invention comprises a process for preparing a liquid binder by mixing 60-80 wt% of thermoplastic material resin, 5-15 wt% of bioceramics powder, and 5-35 wt% of a plasticizer and a stabilizer per 100 parts by weight of water and slowly putting the thermoplastic resin into the water heated at 80-100°C while stirring the water and then heating the mixture for 10-60 minutes to melt; a process for mixing additives comprising 10-30 wt% of citric acid, 3-10 wt% of liquid sodium silicate as a curing agent, and 0.2-0.5 wt% of a pigment with 100 wt% of the liquid binder; a process for preparing a mixture by cooling down the liquid binder mixed with the additives and then mixing 60-70 wt% of the liquid binder with 100 wt% of a natural fiber wood flour; a process for shaping the mixture by putting the mixture into a molding press heated at 80-150°C; and a process for curing a molded product by leaving the film material drawn in the shaping process at room temperature. According to the present invention, the thermoplastic packaging film is manufactured in a liquid form so as to be mixed with the natural fiber wood flour without adding extra water, and the binder as a binding agent is uniformly distributed so as to obtain products having uniform strength when producing the final products. Additionally, the thermoplastic packaging film is rapidly degraded when buried to discard and also resupplies various minerals contained in the wood flour to soil, thereby preventing soil acidification. |
