Wuhan Handern Photo-biodegradable Plastic Ladle Film
DATE：2020/5/4 8:20:14 / READ： / SOURCE：This station
Wuhan Handern Photo-biodegradable Plastic Ladle Film
Wuhan Modern Light --- Biodegradable plastic is a degradable plastic developed by combining the photodegradation mechanism and the biodegradation mechanism, and is also an environmentally degradable plastic. There are many factors that promote the degradation of this type of plastic, including light, oxygen, biology, mechanical force, etc. It can biodegrade at the same time as photo-oxygen degradation. Therefore, it can not only degrade in the light environment, but also in the lack of light or shading Under environmental degradation, it has a faster degradation rate than starch-based biodegradable plastics. It degrades more thoroughly and has better molding performance. And, within a certain range, tunable degradation can be achieved. www.handern.com breathable membrane equipmentLight --- The degradation mechanism of biodegradable plastics can generally be considered as follows: when photobiodegradable plastics are placed under suitable environmental conditions for degradation, on the one hand, microorganisms erode the degraded plastics to loosen their surface and increase the specific surface area On the other hand, degraded plastics undergo photochemical reactions under the action of light and oxygen, and macromolecules of plastics generate materials containing free radicals or methyl ketones and containing terminal vinyl groups. These substances continue to be affected by light, oxygen and natural environmental conditions, and will be further degraded into lower molecular weight substances, such as ketones, acids, esters, aldehydes, etc. Substances with low molecular weight are easily digested by microbial enzymes, and then further degraded into CO2 and H2O, which is absorbed by nature. www.handern.com breathable membrane equipment
According to the information, the photo-biodegradable plastic film can reach: 20-30 days, the cracks appear: 30-40 days in the form of fragments or powder; 60-90 days, the film can disappear visually, and its relative molecular mass reduction rate reaches polyethylene photo-biodegradable plastic The film can be produced on ordinary polyethylene extrusion blown film equipment and is 90% to 95%. www.handern.com breathable membrane equipment
Blending method of polyethylene and masterbatch. The key to its production technology is the manufacture of photo-biodegradable masterbatch. The photo-biodegradable masterbatch used in industrial production has two forms: First, after a certain proportion of photosensitizer, starch, biodegradation accelerator, etc., are fully mixed with the carrier resin, the same direction twin screw extruder is used Plasticizing and kneading, then extruding and pelletizing into a photo-biodegradable masterbatch; then blending polyethylene to make a film. The second is to produce photo-degradable masterbatch and starch-based degradable masterbatch separately, and then mix with polyethylene resin in a certain proportion. Because the photo-biodegradable plastic has a reduced starch content compared with starch-based biodegradable plastic, its preparation Into a film. www.handern.com breathable membrane equipment
Molding performance has been improved. However, if compared with photodegradable plastics, due to the addition of a certain amount of deposits, its molding performance will be reduced, and the heating temperature during molding will be reduced accordingly. www.handern.com breathable membrane equipment
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