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What is polylactic acid? Is spunbond + polylactic acid the best combination?

updatetime:2021-04-13 10:28:21

As a green and environmentally friendly material using renewable resources such as starch-based agricultural products as raw materials, polylactic acid material can be degraded into carbon dioxide and water after use. It has the potential to replace traditional petroleum-based polymer materials. It is used in plastics, films, foam materials, etc. The field has mature application, is currently one of the most mature industrialization, the largest output, and the most widely used bio-based and biodegradable plastics, which can effectively alleviate the dependence on petrochemical resources and reduce the problem of white pollution.

In 2019, the global PLA production capacity was 292,700 tons, accounting for 25.0% of the global biodegradable plastic production capacity. Propelled by favorable policies such as the "Thirteenth Five-Year" Special Plan for Scientific and Technological Innovation in the Material Field, "Opinions on Further Strengthening the Treatment of Plastic Pollution", and national key research and development plans, my country's polylactic acid material industry has shown a vigorous development trend. The rapid development of modification research has provided a good technical foundation for expanding the scope of application from the raw material level.

In December 2018, the European Union had already passed the "Abolition of Disposable Products in 2021" bill. However, this sudden new crown epidemic has put an end to these upcoming changes. In order to prevent the spread of the epidemic, disposable gloves and masks have been regarded as "star" products, which have been produced on a large scale in units of billions. The environmental problems caused by this have gradually attracted attention.

However, my country’s polylactic acid industry currently has problems such as limited monomer preparation technology, high product costs, insufficient market competitiveness, and weak industrialization and downstream application development. Both technology and cost cannot replace the existing petroleum products such as polypropylene. "Disposable" medical and sanitary products based on raw materials.

"Use and discard" products, the most potential

Therefore, the focus of future research on polylactic acid will be to improve the synthesis process, produce polylactic acid with a relatively high molecular weight, simplify the process flow to reduce its production cost, and finally produce a variety of suitability and economy that can meet the needs of consumers. Products provide corresponding raw materials. In order to give full play to its degradable characteristics, the development direction of polylactic acid products should be the application research of "disposable" products. Polylactic acid spunmelt nonwoven materials for medical and health use are the most potential product varieties and have great development. space.

Spunbond + polylactic acid, the best combination

The spunbond nonwoven process has the characteristics of short process, high output, and convenient development of new products. The products have been widely used in the field of "disposable" products such as personal care and medical protection. Features, reducing the production cost of spunbond non-woven fabrics and using new processes to produce differentiated products are the key needs of users for equipment and process development.

Short process and high efficiency
Integration of slice to finished product
Less labor, high output
Flexible variety
Stable product quality
New products, new processes
The two-component spunbond process is derived from the composite spinning technology of synthetic fibers, which is conducive to the development of more composite spinning technologies suitable for spunbond nonwovens to meet the performance needs of spunbonded nonwovens. The direction of the equipment R&D enterprises.