What are the materials of tea bags?
There are several kinds of tea bag materials. Common tea bag materials on the market include corn fiber, non-woven pp material, non-woven pet material and filter paper material.
The paper tea bags that the British drink every day. Which disposable tea bag is good? The following are some of these tea bags.
1. Corn fiber tea bags
Corn fiber is a synthetic fiber made of corn, wheat and other starch as raw materials, made of lactic acid through a special formula, and then polymerized and spun. It is a natural cycle and biodegradable fiber. The fiber does not use petroleum and other chemical raw materials at all, and its waste can be decomposed into carbon dioxide and water under the action of microorganisms in soil and seawater, and will not pollute the global environment.
2. Non-woven pp tea bag
PP material is polypropylene, which is a non-chisel, odorless and tasteless milky white high crystalline polymer. PP polyester is an amorphous, its melting point should be above 220, and the thermoforming temperature should be around 121 degrees. But because it is a polymer after all, the higher the temperature, the more
The greater the possibility of oligomers coming out, and most of these substances are not good for human health. And according to the customer's use, the boiling water is generally 100 degrees, so the general plastic cup will not be marked with more than 100 degrees.
3. Non-woven PET material tea bag
As a packaging material, PET has excellent high and low temperature resistance. It can be used for a long time within the temperature range of 120 degrees, and can withstand high temperatures of 150 degrees for short-term use. Low gas and water vapor permeability and excellent resistance to gas, water, oil and odors. High transparency and good gloss. It is non-toxic, tasteless, hygienic and safe, and can be directly used in food.
4. Tea bags made of filter paper
In addition to the filter paper used in general laboratories, there are many applications of filter paper in daily life, and coffee filter paper is one of them. The filter paper on the outer layer of the tea bag provides high softness and wet strength. Most filter papers are made of cotton fibers with numerous small pores on the surface for liquid particles to pass through, while larger solid particles are not mentioned.
5. Paper tea bags
One of the raw materials used in this paper tea bag is abaca. The material is thin and the fibers are long. The resulting paper is strong and porous, creating suitable conditions for the diffusion of tea flavors. Another raw material is plastic heat-sealing fibers, which are used to seal tea bags. The plastic does not melt until it is heated to 160°C, so it does not easily disperse in water. To prevent the tea bags themselves from dissolving in the water, a third material, wood pulp, is also added. After draining the abaca and plastic mixture, coating it with a layer of wood pulp, and finally putting it into a large 40-meter-long paper machine, the tea bag paper was born.
