Patent name: A biodegradable plastic master batch and its preparation method
Patent number: CN1478809
Public date: 2004203203
The invention relates to a biodegradable plastic master batch and a preparation method thereof. The master batch includes starch, a resin and a polymer, the starch is a refined modified starch, and the mass ratio of the sum of the refined starch and the resin and the polymer is 2:3 to 5:1, wherein, The mass ratio of resin and polymer is 1:4 to 4:1. It also has high boiling point plasticizers, lubricants, and oxidation-reducing agents. The amounts of these resins are 5% to 40% and 10% of the mass of the refined starch, respectively. 30 % and 015 % to 10 %. The method includes four steps of preparing the micronized starch by a high-speed impact method, heating the high-speed mixer, inputting a cross-linking agent, preparing a refined modified starch, reducing the temperature of the refined modified starch, adding the resin and the polymer, and then Granulation. Masterbatch can be used to produce a variety of disposable biodegradable plastic products, such as packaging bags, plastic film, nursery pots, tableware and so on. The film has high strength and can reduce pollution and protect the environment.
Source: Foreign Plastics
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