What is bamboo fiber? The bamboo fiber is a sort of cellulose fiber extracted from naturally grown bamboo. It has excellent properties of air permeability, moisture absorption, abrasion resistance and dyeability. The underwear made of bamboo is absorbent and breathable, anti-bacterial and anti-UV, and also has the functions of deodorization and mites inhibition.
What bamboo fiber is?
Bamboo fiber is a kind of regenerated cellulose fiber produced by patent technology, which uses bamboo as the raw material, extracts cellulose, hemicellulose and lignin from it, and then manufactures pulp and spinning.
Observed under the electron microscopy, the bamboo fiber has transverse nodes in the longitudinal direction, and its thickness distribution is rather uneven. And there are numerous fine grooves on the surface of the fiber. The transverse section is an irregular oval covered with big and small pores, whose edges are cracked.
5 benefits of bamboo fiber
1)Anti-bacterial and bactericidal
Bamboo fiber products have natural effects on resisting, inhibiting and killing bacteria, because of a substance named “bamboo quinones” that has natural functions of bacteria and mites inhibition, deodorization and insects repellent.
Japanese authorities have found that bacteria can reproduce in large quantities in cotton, wooden and other fiber products under a microscope, while bacteria on bamboo fiber products can not only survive for a long time, but also disappear or decrease in a short period of time. The bacterial mortality rate within 24 hours is more than 75%.
The transmittance of ultraviolet light (UV) depends on many factors, such as micro-structure, coverage coefficient, color, chemical additives in process and sample treatment. The ultraviolet penetration rate of bamboo fiber and cotton has been tested by Shanghai Institute of Physics, Chinese Academy of Sciences. It was proved that for 200~400nm ultraviolet radiation, the penetration rate of cotton was 25%, while the penetration rate of bamboo fiber was less than 0.6%, and its UV resistance was 41.7 times higher than that of cotton. This wavelength of ultraviolet radiation is the most harmful to the human body. In terms of preventing it, bamboo fiber outperforms any other textiles.
3)Moisture absorption and air permeability
Under 2000 times electron microscope, the cross section of bamboo fiber has a bumpy and deformed surface covered with pores similar to oval, which is hollow and has a strong wicking effect, which can absorb and evaporate moisture in an instant.
The far infrared emissivity of bamboo fiber is as high as 0.87, which is much better than that of traditional fiber fabric, so it accords with the characteristics of thermal comfort. When the temperature is 36 °C and the relative humidity is 100%, the moisture regain of bamboo fiber is more than 45%, and the air permeability of bamboo fiber is 3.5 times stronger than that of cotton. Thus, it is praised as "breathing fiber" and "fiber queen" .
4)Deodorization and adsorption
The special microporous structure of bamboo fiber endows it a strong adsorption capacity, and therefore, it can adsorb formaldehyde, benzene, toluene, ammonia and other harmful substances in the air, and eliminate odour.
The results of the deodorization test of bamboo fiber are as follows:
|Initial concentration of ammonia 40PPM|
|Time||0 minutes||In 2 hours||In 24 hours|
|Ammonia concentration (PPM)||40.0||4.4||0.6|
The experiment shows that bamboo fiber contains sodium copper chlorophyll, which has a good deodorization function.
Bamboo grows for a short period of time, can be put into use within 2-3 years, and is reproduced in a long term. Bamboo can grow 3 feet overnight. It can grow and revive rapidly. It can replace cotton, wood and other resources. It can be used in a sustainable way. Bamboo fiber products can be biodegraded in the soil. Its decomposition will make no pollution to the environment. It is a pure natural, green, and environment-friendly textile raw materials.
Why can bamboo fiber inhibit and resist bacteria?
Once upon a time, people found there were few birds in the bamboo forest! Experts were curious about it and did a research , which found that there’s a substance called “bamboo quinones” in bamboo. Many bacteria are afraid of “bamboo quinones”, for if they meet this kind of substance, they will die. As a result, when there are fewer bacteria, there are fewer insects; when there are fewer insects, there is less food for birds, so they seldom come to the bamboo forest!
Cotton towels, which are commonly used in daily life, stink easily in summer because cotton products themselves cannot inhibit or resist bacteria, where mass bacteria reproduce, and cause them to be moldy, stale and sticky. The reason why bamboo fiber towel won’t be like this is mainly because it can resisting and inhibit bacteria. Bacteria can not reproduce, or even can not survive on it. So towels made of bamboo fiber are not moldy, tasteless and sticky even in warm and humid environments. It is the “bamboo quinones” that endows the bamboo fiber excellent properties of resisting,inhibiting and killing bacteria!
How to make the bamboo fiber for underwear manufacturing?
At present, for seamless clothing manufacturers, most of the commonly used bamboo fiber in the market is bamboo pulp fiber. The methods of production are as follows:
First, turn bamboo slices into fluid, then make the fluid into pulp through the process of wet spinning.
The wet spinning process is:
1) preparation of spinning solution (that is, bamboo pulp);
2) the pulp is pressed out of the spinneret hole to form a fine flow;
3) the pulp fine stream solidifies into the primary fiber;
4) the primary fiber is coiled or post-treated directly.
Applications and uses of bamboo fiber fabric
After know what bamboo fiber fabric is, let us talk about the applications.
1) Bamboo cotton blend yarn with less than 30% bamboo fiber content is more suitable for seamless underwear, socks and other close clothes, and can also be used to make medical care products.
2) Blend with cotton, wool, hemp, silk and chemical fiber for weaving or knitting, can produce various specifications of woven fabrics and knitted fabrics. Woven fabric can be used to make curtains, jackets, casual clothes, suits, shirts, sheets and towels, bath towels, etc. Knitted fabric is suitable for underwear, sweatshirts, T-shirts, socks and so on.
3) Bamboo fiber yarn can be used in garment fabrics, cool mats, sheets, curtains, scarves, etc. Besides, blends with vinylon can produce light and thin clothing fabrics.
4) Bamboo fiber is also used in the manufacture of healthy and environmentally friendly tissue.