Total biodegradable film and preparation method

Abstract

The present invention discloses a film which can be completely bio-degraded and its preparation method. Said film is made up by using (wt%) 5-20% of multicomponent system polymer, 60-80% of starch, 5-20% of plasticizer and 0.05-0.2% of defoaming agent and adopting the processes of mixing reaction, preplasticizing treatment, extruding granulation and blow-moulding to form film. Besides, sand invention also provides the concrete composition of every polymer of three polymers of the above-mentioned multicomponent system polymer.

Description

technical field

[0001] The invention relates to a biodegradable film, in particular to a fully biodegradable film blown into a film by a common blow molding machine and a preparation method thereof. Background technique

[0002] While the chemical plastic film is convenient for people to use, it also forms a recognized white pollution that is difficult to degrade. In order to solve the pollution problem caused by chemical plastic films, people have been working hard to find effective replacement products. At present, in the process of searching for alternative products, the following three categories are more prominent: the first category is to introduce biodegradable starch and organic acids or esters into the usual polyethylene film, hoping to promote the oxidation of the film through oxidation. The purpose of decomposition is to finally decompose organic acids or esters into carbon dioxide and water through the oxidation process of photodegradation, bio...