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可降解包装袋的主要成分是淀粉基塑料!

可降解包装袋的主要成分是淀粉基塑料!

来源网址:https://www.swjjkl.com/ 2021-07-12 14:51:02    

目前市场上可降解包装袋中的可降解原料主要是淀粉基塑料。生物降解材料随着人类保护环境意识的提高,石油资源的不断减少,生物降解聚合物取代传统石油基聚合物已经成为发展的趋势。

At present, starch based plastics are the main degradable materials in degradable packaging bags on the market. With the improvement of people's awareness of environmental protection and the continuous decrease of petroleum resources, biodegradable polymers have become the development trend to replace traditional petroleum based polymers.
生物降解塑料袋不可降解材料废弃后易形成“白色污染”,这些难降解材料的处理带来了巨大的技术问题同时也促进了可生物降解材料的发展。pbat属于热塑性生物降解塑料,是己二酸丁二醇酯和对苯二甲酸丁二醇酯的共聚物,兼具PBA和PBT的特性,既有较好的延展性和断裂伸长率,也有较好的耐热性和冲击性能;此外,还具有优良的生物降解性,是生物降解塑料研究中非常活跃和市场应用降解材料之一。因为淀粉基塑料的成本远低于PLA或PBAT,所以很多厂家会选择淀粉基塑料作为原料生产可降解包装袋。
The non degradable materials of biodegradable plastic bags are easy to form "white pollution" after being discarded. The treatment of these refractory materials has brought huge technical problems, and also promoted the development of biodegradable materials. PBAT is a kind of thermoplastic biodegradable plastics. It is a copolymer of butylene adipate and butylene terephthalate. It has the characteristics of PBA and PBT. It has good ductility, elongation at break, heat resistance and impact resistance; In addition, it has excellent biodegradability, and is one of the most active biodegradable materials in the research and market application of biodegradable plastics. Because the cost of starch based plastics is far lower than PLA or PBAT, many manufacturers will choose starch based plastics as raw materials to produce degradable packaging bags.
当淀粉用于塑料加工和生产时,通常需要对其进行改性,然后进行加工或与其他聚合物混合。
When starch is used in plastics processing and production, it usually needs to be modified, then processed or mixed with other polymers.
天然淀粉可以从块茎或种子中获取,如土豆、土豆、玉米、大米、小麦和燕麦。淀粉基塑料淀粉用于大多数可生物降解袋的主要是玉米淀粉,玉米淀粉颗粒的组成主要包括水分、酯类、含氮物质、灰烬、磷等,直链淀粉的含量约为26%,固有水分含量为9%至15%。
Natural starch can be obtained from tubers or seeds, such as potatoes, potatoes, corn, rice, wheat and oats. Starch based plastic starch is mainly used in most biodegradable bags. The composition of corn starch granules mainly includes moisture, esters, nitrogen-containing substances, ash, phosphorus, etc. the amylose content is about 26%, and the inherent moisture content is 9% to 15%.
在重新制造可生物降解袋的淀粉碱时,通常处理淀粉以改善未经处理的淀粉的以下缺点:与聚乙烯等聚合物的兼容性差:生产可降解袋的淀粉处理方法有很多,如简单的表面处理、粘贴处理、各种变性处理和淀粉分级改造等。
When remanufacturing starch alkali of biodegradable bags, starch is usually treated to improve the following disadvantages of untreated starch: poor compatibility with polyethylene and other polymers; there are many starch treatment methods for producing biodegradable bags, such as simple surface treatment, pasting treatment, various denaturation treatment and starch grading transformation.