1. Moisture absorption and breathability:
There is an elongated cavity in the center of the hemp fiber that is connected to many cracks and pores distributed on the surface of the fiber. The excellent capillary effect makes the hemp fiber extremely good at moisture absorption and perspiration. According to calculations, compared with cotton fabrics, wearing hemp clothing is The human body feels the temperature is about 5℃ lower.
Below is the cross-section and longitudinal surface morphology of hemp fiber
As can be seen from the above figure, the cross-section of hemp fiber has various shapes, such as triangle, rectangle, waist circle, etc., and the shape is irregular. Among them, triangles and rectangles account for the majority, and the outer corners are relatively sharp. The shape of the middle cavity is different from the shape of the outer cross-section. The middle cavity is mostly polygonal, and some are linear, oval, or waist-round, but rectangular cross-sections account for the majority.
The longitudinal thickness is uneven, some are in the shape of round tubes, and some are in the shape of flat ribbons. The surface is rough, with longitudinal gaps and holes and transverse knife carvings. There is no natural twist, and the diameter of a single fiber is uneven in the longitudinal direction.
In the dry spring, autumn and winter, hemp fiber has good thermal insulation properties, while in the summer it is cool and pleasant. This is mainly because on the one hand, the hydrophilic genes in the hemp fiber molecules are easy to combine with and adsorb water molecules. Its loose molecular structure and hollow shape. The cavity in the center of the hemp fiber is relatively large, often accounting for 1/3~ of fiber cells. 1/2 of the volume can fill a large amount of capillary condensation water, making the hemp fiber absorb moisture more and faster; on the other hand, the dense cracks and holes on the surface of the hemp fiber are beneficial to dispersing moisture. Therefore, hemp fabric has excellent moisture absorption and breathability properties, and hemp fiber is very suitable as a raw material for clothing.
2. Antistatic properties:
Dry hemp fiber is a poor conductor of electricity, and its resistance to electrical breakdown is about 30% higher than that of cotton fiber, making it a good insulating material. Under normal circumstances, because hemp fiber has particularly good hygroscopicity, hemp textiles exposed to the air generally contain about 12% water. When the air humidity reaches 95%, the water content reaches 30%, but they do not feel wet to the touch. Therefore, hemp textiles can Avoid static electricity accumulation, no pilling due to friction and no dust absorption.
3. UV resistance:
Anti-ultraviolet performance: The cross-section of hemp fiber is irregular triangles, polygons, etc., and its molecular structure is polygonal, loose, and has spiral lines, so its products have a good dissipation effect on sound waves and broadcasts. According to testing, General cannabis can block more than 95% of ultraviolet rays without special preparation.
4. Heat resistance:
The heat resistance of hemp fiber is unmatched by other fibers. Hemp fiber does not change color at 370°C, so it is particularly suitable for sun protection clothing and various special-need work clothes, car seat cushions, decorative fabrics, etc.
5. Fineness of hemp fiber:
Hemp cannot be regarded as a thin fiber. Although hemp single fiber is the thinnest and softest among various hemp fibers, because hemp is a bundle of fibers, its splitting degree is worse than that of other hemp types, so it is always difficult to increase the fineness of the fiber and spinning. The modification of hemp fiber is mainly to obtain fine fibers that can meet the performance requirements of textiles to restore the advantages of hemp in competing with chemical fibers and other natural fibers in terms of comfort and ecology.
6. Antibacterial properties:
Hemp fiber contains a variety of trace elements that are beneficial to human health. Fiber hemp contains trace amounts of cannabidiol, which is a very good bactericidal disinfectant; hollow hemp fiber is usually rich in oxygen, which also makes it difficult for anaerobic bacteria to survive.
7. Anti-noise function
The cross-section of hemp fiber is irregular triangles, polygons, oblates, etc., which are obviously different from ramie and flax fibers. In addition, the polygonal molecular structure causes light waves and sound waves to form diffuse reflection and multi-layer in the crystallization area of hemp fiber. Light is refracted and trapped in the amorphous areas, gaps and holes of fiber molecules, where it is widely destroyed and absorbed. Can protect people’s health.
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