Which degradable packaging materials are included in degradable packaging materials?
1, photodegradable plastics; it is degraded under the action of light, divided into two types: molding and additive. Synthetic photolysis refers to the introduction of some weak chains with low energy and easy to break in the process of polymer synthesis, or connecting some photosensitive genes and transferred atoms that can see photolysis. In this way, chemical reaction will occur under the action of light, which will lead to the degradation of polymer macromolecules, and the long chains will break into small molecular fragments that are easy to be swallowed by microorganisms. The additive photodegradation is to add a certain amount of photosensitizer into the plastic ingredients, which will also degrade under the action of light. The method is relatively simple and the cost is relatively low.
What are the contents of degradable packaging materials
2. Biodegradable plastics. It is degraded by bacteria, molds and various microorganisms. Due to the fact that the internal structure or composition of materials can be decomposed by common microorganisms, the packaging waste is digested and absorbed by microorganisms in the natural environment, and then decomposed into small molecular type and participation type. The participatory biodegradable plastic is a kind of biodegradable material in which a certain amount of starch, natural straw, rice straw and fruit shell are incorporated. After the formation of certain biodegradable packaging products.
3. Compound degradable plastics; it is degraded under the joint action of light and biology. Adding biodegradable starch, controllable degradable photosensitizer and automatic oxidant into plastics will cause the performance of plastics to decline after use, and the plastics will break into pieces regularly. After that, the plastics will decompose rapidly through the reaction of microorganism and automatic oxidant.