What are the materials and advantages and disadvantages of tea bags?
The common materials for tea bags are basically the three you listed: non-woven fabric, nylon, and corn fiber. Non-woven fabrics refer to polypropylene, which is the same material as mask fabrics. Nylon is also a petrochemical product, so I won’t talk about this more commonly. Both of these can be made into food grade, otherwise it would be impossible to make tea bags. The better tea bags I bought in Southeast Asia are all nylon bags. If it’s the popular ones like Lipton’s, they have more non-woven fabrics. Even if you use the best materials for the above two types, there is no way to solve the problem of high temperature and long-term soaking. Microplastics will be released. If they are of inferior quality, more toxic substances will be released. Therefore, you can use this If you really want to use them, you must have a reliable channel to buy high-quality tea bags. If it is unavoidable, at least avoid poisoning. Time high to soak. As for corn fiber, it is the best and the least of the three materials. This corn fiber is not the fiber we usually talk about when we eat, let alone 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 known as polylactic acid fiber and PLA fiber. The unit price is much more expensive than the other two, at least twice. Moreover, the current global output is very high. Now that the world is pushing to ban plastic, the demand for PLA is higher, and the production capacity is still increasing. It is estimated that it will be better in three to 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 they are burnt to ashes or granules by burning them with fire. 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.
