Which kind of anti-ultraviolet curtain or blinds is good? How to choose?
Which kind of anti-ultraviolet curtain or blinds is good? How to choose?
As the ozone layer destroys more and more, the weather becomes warmer and more and more can be felt in daily life, so some people have specially developed a kind of fabric called anti-ultraviolet curtain, So what about this UV-resistant fabric and anti-ultraviolet blinds? What kind of standard index is really able to prevent ultraviolet rays? What is the anti-UV index in China? What kind of it is it? What kind of good is the UV-proof curtains, anti-ultraviolet blinds, uv block blinds fabric, UV Blackout Blinds that are common in life?
Anti-UV Curtains/anti-ultraviolet curtain,anti-ultraviolet blinds,uv block blinds fabric,UV Blackout Blinds Introduction
UV-proof curtains/blinds are those that have a good UV-proof function.
Anti-ultraviolet curtain,anti-ultraviolet blinds,uv block blinds fabric,UV Blackout Blinds principle and function
Anti-ultraviolet curtain fabric is the main raw material is a flat wire, flat wire on the regular formation of triangular tapered small prism, in the small prism of the surface of the injection of light, so that most of the ultraviolet light reflected out, the formation of UV-proof function. all anti-ultraviolet curtain,anti-ultraviolet blinds,uv block blinds fabric,UV Blackout Blinds has UV-proof function.
Anti-UV Standard index UV protection coefficient UPF (Ultraviolet Protection Factor), also known as the ultraviolet shielding coefficient, is the ability to express fabric protection against ultraviolet rays. It is the ratio of ultraviolet radiation to the average radiation of unprotected skin and the amount of ultraviolet light that will be tested by the fabric after occlusion.
Ultraviolet penetration Rate Tav: The percentage of the ultraviolet radiation intensity that is transmitted through the sample when the UV radiation intensity is the same as without the sample. We were born in China, and most of the time we lived in China, we said Chinese standards. Drawing on the characteristics of Australian and European standards, China developed the GB/T 18830-2002 (the Evaluation of textile anti-UV performance) in 2002, which stipulates the test methods for the protection of sunlight and ultraviolet properties of fabrics, the expression, evaluation, and identification of protective levels.
Solar Screen fabric and blackout roller blinds fabric is a special window screen mesh that is specially designed for Sun Control. It is the most effective way to Control the Sun’s Heat and Glare by stopping it before it enters your window. Much like a big shade tree, exterior solar screen will help reduce your cooling costs, can reduce the load on your air conditioning and will help reduce glare and fading of home furnishings. Advanced solar screen fabric is extremely durable and pet resistant.
The textiles tested can be labeled as Anti-ultraviolet products when they meet the following conditions.
UPF value >30
Transmission Rate (UV-A) Av <5% The UPF value is greater than 50 o’clock and is identified as 50 +.
At present, there is no uniform UV testing standards in the world.
Anti-UV test methods are generally divided into direct test and instrument testing.
The direct test method including the human body test method and the discoloration fading method, has the simple, the fast, the reproducibility bad characteristic, the human body test method by the human body skin difference has the big system deviation, and the test is harmful to the human body. The instrument test method includes an ultraviolet intensity cumulative method, ultraviolet method, and Spectrophotometer method. The EU standard, Australia/New Zealand standard, British Standard, American AATCC Standard and Chinese standard all adopt the Spectrophotometer method.
The method is mainly to produce ultraviolet rays with 290-400 nm wavelength by a stable UV light source, through a monochromator to illuminate the sample, collect the total spectral projection ray, determine the total spectral projection ratio, and calculate the ultraviolet transmittance and the protective coefficient UPF value of the specimen. The UPF value refers to the ratio of ultraviolet radiation average effect calculated when the skin is unprotected, and the UV-ray average effect calculated when the skin has fabric protection. It can also be considered that after the adoption of textiles, ultraviolet radiation to the skin to achieve a certain damage (such as erythema, eye damage, the critical dose of cancer) the time required Kanbao value and no textiles to achieve the same degree of damage time Kanbao value.
Therefore, depending on the point of focus, as well as the differences in human skin, a textile will have many UPF values, but usually, the UPF value of erythema is represented. European and American buyers of UV-resistant textile products (such as beach wear, swimwear, sunshade textiles, etc.) have different requirements, will adopt different standards. European and American customers to anti-ultraviolet textile procurement requirements are based on the final product use, and more is not based on the fabric type and finishing process. In the case of UV-resistant textile products, U.S. customers generally require the corresponding pretreatment of the products, according to the AATCC183 standard test, and then to ASTM D 6603 Standard to assess the UV-resistant products, according to the use of products to determine the required products against ultraviolet radiation levels and different UPF values.
And European customers in the En 13758.2 standard for the evaluation of UV-resistant products, the demand for UV-UPF value of more than 40, but also a small number of European customers require BS 7914 standard to determine the product’s UV-proof performance.
