Analysis and significance of liquid water transfer performance of fabric
Ultraviolet refers to the general term of radiation with a wavelength from 400nm to 10nm in the electromagnetic spectrum, which is invisible to the naked eye. Ultraviolet in English is ultraviolet, which is what we usually call UV. According to the different wavelengths of ultraviolet rays, ultraviolet rays are mainly divided into three regions. They are short wave ultraviolet, medium wave ultraviolet and long wave ultraviolet.
Short wave UVC
Also known as far ultraviolet, short wave ultraviolet C light, is ultraviolet with a wavelength of 280 ~ 200nm, which is absorbed by the ozone layer when passing through the stratosphere of the earth's surface and cannot reach the earth's surface. Short wave ultraviolet light can play an important role in human body, which needs enough attention.
Medium wave UVB
Also known as medium ultraviolet, medium ultraviolet B light is ultraviolet with a wavelength of 320 ~ 280nm, which has a certain physiological effect on human skin. A large part of this kind of ultraviolet rays is absorbed by the skin epidermis and cannot penetrate into the skin, but its level energy is high, which can cause strong light damage to the skin. The dermal blood vessels in the irradiated part are dilated, and the skin can have symptoms such as redness, swelling, blisters and so on. Long term irradiation of the skin will cause erythema, inflammation and skin aging. In severe cases, it can cause skin cancer. Therefore, UVB, also known as the sunburn (red) section of ultraviolet, is the ultraviolet band that should be focused on prevention.
Long wave UVA
Also known as near ultraviolet, long wave ultraviolet a light, which has a wavelength of 400 ~ 315nm. Its penetration is much stronger than that of medium wave ultraviolet. It can go deep into the dermis and also act on melanin in the epidermis, causing melanin deposition and blackening of the skin. Therefore, it is also called "tanning section". Although it will not cause acute inflammation of the skin, it will accumulate for a long time, It is still one of the causes of skin aging and serious damage. It can reach the skin epidermis as well as UVB. It will cause skin sunburn, redness and pain, solar keratosis and loss of transparency. It has the functions of anti rickets, sterilization and immune enhancement.
With the progress of society and the rapid development of economy, the improvement of people's living standards and material life. At the same time, textile production and processing technology is also developing gradually. People's demand for textiles in all aspects is also increasing. Textiles are not limited to quality and beauty. The protective function of textiles is becoming more and more important. Human beings are constantly destroying the atmosphere. The problem of external wiring is becoming increasingly prominent. In a particular season and on specific occasions, textiles with UV protection capabilities are becoming more and more popular. Increasing the development of anti ultraviolet and anti-aging fabrics is imperative. At the same time, the detection of UV aging is also the top priority. This sgj100a UV aging test box launched by our company is used to test the aging resistance of textiles, leather, plastics, rubber and other materials exposed to UV light. The equipment is irradiated by the original imported UVA-340 fluorescent ultraviolet lamp. At the same time, the influence of moisture can be simulated by condensation or spraying to evaluate the changes of material fading, color change, gloss, crack, blistering, embrittlement, oxidation and so on.