On April 14, 2021, the National Energy Group's 2021 coal-based new material product promotion conference was held in Shenzhen.
This meeting is the first time that the National Energy Group has held a special promotion meeting on coal-based new material products. The chemical industry of the National Energy Group has entered a new stage of development, and will be led by innovation, through the development of clean, high-end and differentiated products, to effectively promote the green and low-carbon transformation and high-quality development of the modern coal chemical industry.
At the meeting, Lesui signed a letter of intent on the purchase and sale of PGA products with the sales company affiliated to the National Energy Group Chemical Company. The two parties will build a win-win industrial chain supply chain cooperation system to jointly promote the healthy development of the domestic degradable plastics industry.
PGA is an aliphatic polyester polymer material with the smallest unit carbon number, a completely decomposable ester structure, and the fastest degradation rate. PGA is also a thermoplastic aliphatic polyester with a glass transition temperature of 40°C and a melting temperature of about 225°C.
Total degradability means that the degradation conditions of PGA are mild. Under the action of water and microorganisms, rapid degradation can be achieved in the natural environment, and the degradation products are harmless to humans and the environment.
At the same time, PGA has good biocompatibility, it can be degraded into water and carbon dioxide in the human body.
The seawater degradation performance of PGA was excellent, and the degradation rate was comparable to that of cellulose at 28 days, reaching 75.3%.
PGA material is one of the materials with the best comprehensive barrier properties, and its barrier property to water vapor is 100 times higher than that of PLA. In view of the excellent barrier properties of PGA, PGA can be widely used in fresh-keeping packaging, bottle materials and other fields.
PGA is used in combination with other materials to improve the overall overall performance. For example, the disposable straw prepared by blending modified materials of PGA and PLA not only has the characteristics of water resistance, grease resistance and high temperature resistance, but also has better degradation performance than pure PLA products.
Minimal Environmental Impact (in Terms of Carbon Footprint)
1. Biomedical field
PGA has good biocompatibility, so it is widely used in medical surgical sutures, internal fixation of fractures, tissue engineering repair materials and drug controlled release systems.
2. Food packaging field
PGA material has good vapor/oxygen barrier properties. Compared with polylactic acid (PLA), polyethylene (PE), polyvinyl chloride (PVC), polypropylene (PP) and other materials, it has good biodegradability, Excellent bacteriostatic and antifungal properties.
3. Industry and Agriculture
PGA can also be used for industrial or household composting. The degradation rate of PGA industrial compost is similar to that of cellulose, and it can be completely degraded after 120 days.