| 摘要 |
The present invention relates to a controllable rapid degradable plastic and preparation method therefor. The controllable rapid degradable plastic is made from the following raw materials in weight percentage: yeast 1-5%, rapid degradation agent 0.1-0.5%, ash 0-5%, corn starch 2-10%, calcium carbonate 10-50%, defoamer 1-2%, color masterbatch 0-0.5%, and balance of polyethylene or polypropylene. The respective raw materials are mixed, crushed, and granulated. The obtained particles are dried via infrared. Then the dried particles are stirred, heated, and molded by blowing molding, extrusion molding or compression molding. Then the molded film is cooled, blank pressed and made into bags. The degradation time of the inventive product can be controlled by adjusting the proportions of ash, corn starch, calcium carbonate, yeast, and rapid degradation agent. The degradation time is in a range of 3 months to 5 years. |
