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In our several years of research, we have conducted a thorough exploration of the functional properties of hemp fibers. With the support of a large number of experimental data, we have got a conclusion that hemp fibers have a series of excellent properties. In recent years, with the improvement of people's quality of life, the pursuit of environmental protection and the ever-returning fashion trend is on the rise. As a green eco-friendly fiber, its fabrics have the functions of natural antibacterial, ultraviolet shielding, wicking, soft and comfortable, Adsorption odor and wear-resistant properties, but also has distinguished elegance, plain, natural and practical style. As a result, hemp fabrics have become the ideal fabric for top fashion designers. Moisture fast drying is superior to cotton fabric Hemp bundle fiber strength was significantly higher than cotton and linen, slightly lower than ramie, elongation at break and other hemp fibers are basically the same. Hemp fiber bending resistance between the ramie and linen. Anti-torsion performance and other similar hemp fiber. Hemp fiber single fiber length of 15 to 25 mm, fineness of 15 to 30 microns, the fineness of only 1/3 of ramie, close to the cotton fiber. Due to the short hemp single fiber, the textile processing technology is usually used for processing fiber, that is, 3 to 10 fibers and together as a process fiber for spinning, weaving, printing and dyeing, so that although the process fiber is harder than the cotton fiber, And with the use of the reduction of glial between fibers, the gradual division, the fiber fineness gradually close to the cotton fiber, feel more and more soft, more comfortable to wear. From the electron micrograph we can clearly see that the end of the hemp fiber is arc-shaped, rather than spire of ramie, so even if the fiber is thick, it does not appear ramie-like itching. After degumming, the degree of polymerization of the hemp fiber is small (about 70% of the flax, half of the cotton, 1/8 of the ramie), large fiber cavity (about 1/3 ~ 1/2 of the cross-sectional area , Much larger than ramie, linen, and cotton) and has a large number of micropores; there are many fissures and holes in the longitudinal direction and are connected to the cavity. Therefore, hemp fiber has excellent hygroscopic breathability. Taking han mare cloth as an example, the moisture absorption rate reaches 7.43mg / min and the wetting rate is as high as 12.6mg / min. The moisture absorption rate of hanabe than hemp cotton fabric is 27% and the rate of wetting is 32%. In the dry climate of autumn and winter, the hemp fiber has a good warmth performance, and in summer it is cool and pleasant. On the one hand, the hydrophilic gene in hemp fiber molecules is easy to bind with water molecules and adsorb water molecules. Its loose molecular structure and hollow shape can not only increase the thickness of air layer, but also fill a large amount of capillary condensation water, Fibers absorb moisture more and faster; on the other hand, the fine cracks and holes in the hemp fiber surface are good for desiccation. Therefore, hemp fiber is very suitable as a fiber raw material for all kinds of garments. After testing, the results show that under the same environmental conditions, the moisture regain of hemp fiber is basically the same as cotton fiber, the standard moisture regain of hemp fiber is 7.9% ~ 9.7%, the cotton fiber is 7% ~ 8% The fiber is slightly above the cotton fiber. Under the condition of humidity 65%, the moisture absorption and release rate of hemp fiber is obviously higher than the moisture absorption and release rate of cotton fiber. Using the same specifications of hemp fabrics and cotton fabrics, the use of humidity boxes and electronic balances, at 100 ℃ under the conditions of moisture absorption and drying test at 105 ℃, we can see from the test results, hemp fabric moisture absorption and Drying rate was significantly higher than the cotton fabric. Provide a protective barrier to human health Hemp fiber has excellent antibacterial deodorant performance, which is related to its molecular composition and morphological structure. Hemp fiber has a porous structure and strong adsorption properties, under natural conditions, hemp fiber will absorb more oxygen, so that the living environment of anaerobic bacteria are destroyed, which makes the hemp structure has antibacterial Advantage. At the same time, the fabric made of hemp fiber, can make the human body sweat quickly discharged, thus undermining the bacteria to survive the humid environment, showing antibacterial properties. In addition, the hemp plant contains a variety of active phenols (tetrahydrocannabinol THC, hemp diol CBD, hemp phenol CBN), organic acids (oleanolic acid, ursolic acid, palmitic acid) And inorganic salts (NaCl), these substances have obvious killing and inhibition of a variety of bacteria. Institute of Microbiology and Epidemiology, Chinese Academy of Military Medical Sciences, according to the American AATCC qualitative bacteriostasis test, the diameters of bacteriostatic circles of hemp and linen on different microorganisms were: Staphylococcus aureus 9.lmm, Pseudomonas aeruginosa 7.6mm, Escherichia coli 10mm, Candida albicans 6.3mm. At the same time, plaster-like Trichophyton rubrum, Penicillium, Aspergillus obvious killing, inhibition. According to the domestic and foreign tests, the natural inhibition rate of hemp fiber to Staphylococcus aureus, Escherichia coli and Candida albicans is over 99%, washing 50 times. After testing, hemp fiber products also have good mildew, anti-mite performance. Hemp fiber blended towel according to the United States AATCC30-2004 test, no growth of Aspergillus niger at 7 days under the temperature of 20 ℃, with good anti-mold effect. The bedding made of hemp fiber blended made 67.07% of dust mite protection performance. Therefore, hemp fiber products can give consumers a healthy protective barrier. The use of hemp fiber can not only develop textile products, textile products can also be developed, the market has great potential. Has excellent anti-radiation and adsorption properties Hemp fiber has excellent anti-ultraviolet radiation properties. One hemp fiber after degumming still has some lignin content, which is not available in cotton fiber, lignin is a natural UV absorber. Second, the hemp fiber cross section is irregular triangular, quadrilateral, hexagonal, oblate, lumbar or polygonal, etc., the cavity was linear or oval. From the hemp fiber molecular structure analysis, the molecular structure of a spiral line pattern, polygonal shape, more loose. After the light wave or sound wave is incident, the light wave and sound wave form diffuse reflection and multi-layer light refraction in the crystalline zone of hemp fiber, such as stagnant pits and cracks in the amorphous area, Hemp fabric has a good anti-ultraviolet radiation function. Institute of Physics, Chinese Academy of Sciences test, ordinary clothing can only block 30% to 90% of the UV, and general hemp fabrics do not need special finishing, you can shield more than 95% of UV, canvas, such as hemp can 100% UV blocking radiation. Hemp fiber is a natural fiber, hemp fibers used in apparel, the cellulose content is usually greater than 95%, so the hemp fiber antistatic properties similar to the cotton fiber. Hemp fiber has excellent adsorption properties. By comparing with cotton fiber adsorption performance, the results show that under the same conditions, hemp fiber adsorption capacity is far stronger than the cotton fiber. This is related to the morphology of the single fiber structure. The porous structure of hemp fiber increases the adsorption area and greatly improves the adsorption performance. From the morphological analysis of hemp fiber structure, hemp fiber is porous and hollow structure, the cross-sectional morphology is very irregular, this multi-longitudinal cracks and irregular shape, giving hemp larger adsorption area, which performance Outstanding adsorption performance. In addition, hemp fibers contain traces of chemicals that react with the chemical constituents of the total volatile organic compounds (TVOCs) to enhance TVOC adsorption. Related links Hao Xinmin, Doctor of Engineering, General Rear Military Equipment Institute of military hemp materials research center chief engineer, senior engineer. Mainly engaged in functional textile fibers and special protective clothing research and development. Won the first prize of national scientific and technological progress 2, a second prize, the second prize of a national technological invention, the army four scientific and technological progress prize four, Beijing Science and Technology Progress Award two, China Textile Engineering Association Science and Technology Progress Award 1. He has published over 90 professional papers and 6 master masters. Has obtained 35 invention patents, utility model patents 15. In 2006 was named the total post-technology Silver Star, in 2004 enjoy the State Council special allowance. He is also the technical leader of hemp fiber technology and complete equipment research.