Tea bag material and advantages and disadvantages?
The common materials for tea bags are basically the three you listed: non-woven fabrics, nylon, and corn fiber. Non-woven fabrics refer to polypropylene, which is the same material as mask fabrics. Nylon is also a petrochemical product, which is more common. Both of these can be made food grade, otherwise it would not be possible to make tea bags. The better tea bags I bought in Southeast Asia were all nylon bags. If they were popular ones from Lipton, they would have more non-woven fabrics. Even if you use the best materials for the above two, there is no way to solve the problem that microplastics will be released during high temperature and long-term soaking. If they are of inferior quality, they will release more toxic substances. If you really want to use it, then you must have a reliable channel to buy high-quality tea bags. If it is unavoidable, at least be less poisoned. When you use it, try to rinse it out and take it out. Time high soaking. As for corn fiber, it is the best and least among the three materials. This corn fiber is not the fiber we usually say when we eat, and it is not the ones you see in the leaves of corn silk, but a kind of polylactic acid (PLA). The biodegradable material is also called "corn plastic" in the United States, also called polylactic acid fiber, PLA fiber. The unit price is much more expensive than the other two, at least twice. Moreover, the current global production is very high. Now that the world has banned plastics, the demand for PLA is higher, and the production capacity is still increasing. It is estimated that it will be better in three or five years, but in fact, the production capacity is still far from enough. Most of the corn fiber tea bags on the market are fake. You can tell if you burn them into ashes or into grains. Therefore, the preferred order of the three tea bags is: 1. Corn fiber (polylactic acid PLA) 2. Other high-quality non-woven fabrics and nylon.
