塑料包装行业趋向生物化

VTT Technical Research Centre of Finland has developed a technique to significantly improve the quality of bio-based plastic packaging. The new generation of bio-based plastic packaging is not only eco-friendly but also has several superior qualities compared to traditional plastic packaging. The plastic packaging industry is moving towards completely bio-based products. The volume of oil used every year in the production of plastics equates¹ to approximately five per cent of the world's total oil consumption. Approximately 40 per cent of all plastics are used in packaging, which puts special pressure on the packaging industry to reduce dependence² on oil. The use of renewable natural resources in industrial applications reduces dependence on oil and the carbon footprint attributable to consumption. A transition to bio-based economy nevertheless requires products that are not only ecologically sustainable but also competitive in terms of quality.   VTT has developed a technique that enables the production of the PGA monomer glycolic acid（乙醇酸） from bio-based materials more efficiently³ than before.   "Bio-based plastics are a tangible⁴ step closer to a bio-based economy. This new generation of plastic packaging not only reduces our dependence on oil but also offers superior quality compared to traditional plastic packaging," explains Research Professor Ali Harlin from VTT.   Bio-based PGA plastic has excellent barrier properties. Adding PGA into the structure of traditional plastic packaging significantly improves its quality. In addition to strength and heat resistance, plastic packaging also needs to be airtight, vapour-proof and grease-resistant. Bio-based PGA plastic is between 20 and 30 per cent stronger than PLA -- the most popular biodegradable plastic on the market -- and able to withstand temperatures 20 degrees Celsius⁵ higher. It also breaks down more quickly than PLA, but its biodegradability can be regulated if necessary.