What materials can protect against UV rays? Is polyester fabric UV resistant? Anti-UV material type, research status of anti-UV shielding agent According to different protection mechanisms, the types of UV shielding agents used can be divided into two types:
1. The mechanism of action of organic UV absorbers is mainly to absorb ultraviolet light.
The organic ultraviolet shielding agent, that is, the ultraviolet absorbing agent, refers to an organic compound capable of absorbing ultraviolet rays having a wavelength of 270 to 400 nm. Such an organic compound has a common point of having a hydroxyl group in the structure, forming a stable hydrogen bond, a hydrogen bonding chelate ring, or the like. In the process, energy can be absorbed and converted into heat energy.
2. Inorganic UV-reflecting agent, the mechanism of action is mainly to reflect ultraviolet light.
Most of the ultraviolet shielding agents are metal oxides or ceramic powders such as titanium dioxide, zinc oxide, talc, clay, calcium carbonate and the like. They all have a high refractive index and are added to the fabric to increase the reflection and scattering of UV light from the fabric surface.
Polyester fabric is not UV resistant. Polyester fibre A synthetic fiber obtained by spinning a polyester obtained by polycondensation of an organic dibasic acid and a diol. The industrially mass-produced polyester fiber is made of polyethylene terephthalate, and the Chinese name is polyester. It is the first large variety of synthetic fibers.
Is the faded fabric also UV resistant?
Since the pigment or dye in the fiber has a relatively strong absorption of ultraviolet light, the reason for the fading of the fabric is that the structure of the pigment or dye molecule in the fiber is destroyed by ultraviolet light and no color is developed. The ability of ultraviolet light-damaged pigments and dye molecules to absorb ultraviolet light is greatly reduced, which makes the overall UV protection function of the fabric worse or even lost, causing ultraviolet rays to reach the human body through the fabric, causing harm to the human body.
1. The mechanism of action of organic UV absorbers is mainly to absorb ultraviolet light.
The organic ultraviolet shielding agent, that is, the ultraviolet absorbing agent, refers to an organic compound capable of absorbing ultraviolet rays having a wavelength of 270 to 400 nm. Such an organic compound has a common point of having a hydroxyl group in the structure, forming a stable hydrogen bond, a hydrogen bonding chelate ring, or the like. In the process, energy can be absorbed and converted into heat energy.
2. Inorganic UV-reflecting agent, the mechanism of action is mainly to reflect ultraviolet light.
Most of the ultraviolet shielding agents are metal oxides or ceramic powders such as titanium dioxide, zinc oxide, talc, clay, calcium carbonate and the like. They all have a high refractive index and are added to the fabric to increase the reflection and scattering of UV light from the fabric surface.
Polyester fabric is not UV resistant. Polyester fibre A synthetic fiber obtained by spinning a polyester obtained by polycondensation of an organic dibasic acid and a diol. The industrially mass-produced polyester fiber is made of polyethylene terephthalate, and the Chinese name is polyester. It is the first large variety of synthetic fibers.
Is the faded fabric also UV resistant?
Since the pigment or dye in the fiber has a relatively strong absorption of ultraviolet light, the reason for the fading of the fabric is that the structure of the pigment or dye molecule in the fiber is destroyed by ultraviolet light and no color is developed. The ability of ultraviolet light-damaged pigments and dye molecules to absorb ultraviolet light is greatly reduced, which makes the overall UV protection function of the fabric worse or even lost, causing ultraviolet rays to reach the human body through the fabric, causing harm to the human body.
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