Application of FluorescentWhitening Agent OB1 in Polyester Staple Fiber
I. Action Principle
Fluorescent whitening agentOB-1 is an optical whitening agent. It can absorb invisible ultraviolet light(with a wavelength between 300-400nm) and then convert it into visible blue orblue-violet light. When this blue or blue-violet light is mixed with the yellowlight of polyester staple fiber itself, due to the principle of complementarycolors, the fiber will present a whiter appearance.
II. Application Advantages
Significant whitening effect
Can effectively improve the whiteness of polyester staple fiber, making it brighter and whiter. Compared with fibers without fluorescent whitening agent added, the whiteness can be increased by several grades.
Even at a low addition amount, it can produce obvious whitening effect, reducing production costs.
Good stability
Has good thermal stability. During the processing of polyester staple fiber, such as spinning and stretching at high temperatures, it is not easy to decompose and can maintain good whitening performance.
Has good light resistance. Under long-term illumination, it is not easy to fade and keeps the whiteness of the fiber durable and stable.
Strong compatibility
Has good compatibility with polyester staple fiber and can be evenly dispersed in the fiber without agglomeration or precipitation, ensuring the uniformity of fiber quality.
III. Application Methods
Direct addition method
During the production process of polyester staple fiber, fluorescent whitening agent OB-1 is directly added to the spinning solution. Through the spinning process, the whitening agent is evenly distributed inside the fiber.
The advantage of this method is that thewhitening effect is uniform and durable, but the addition amount needs to be accurately controlled to avoid affecting the performance of the fiber.
Post-treatment method
After the production of polyester staple fiber is completed, fluorescent whitening agent OB-1 is applied to the fiber surface by post-treatment methods such as dipping and spraying.
The advantage of this method isoperation is simple. The amount of whitening agent and treatment time can be adjusted according to needs to achieve different whitening effects.
IV. Precautions
Control of addition amount
The addition amount of fluorescent whitening agent OB1 should be reasonably adjusted according to specific application requirements and fiber characteristics. If the additionamount is too small, the whitening effect is not obvious; if the addition amount is too large, it may cause excessive whiteness of the fiber, resulting in a "fluorescent white" phenomenon and affecting the appearance quality of the fiber.
Generally, the addition amount is between 0.01%and 0.5% of the fiber weight. The optimal addition amount can be determined through experiments.
Cooperation with other additives
In the production process of polyester staple fiber, other additives such as antioxidants and lubricants may be used. When using fluorescent whitening agent OB-1, attention should be paid to its compatibility with these additives to avoid interaction and affecting the performance of the fiber.
Compatibility tests can be conducted to ensure that the fluorescent whitening agent and other additives can work together to improve the quality of the fiber.
Environmental protection requirements
Fluorescent whitening agent OB-1 should meet environmental protection requirements and not contain harmful substances, so as not to cause harm to the environment and human health.
When choosing a fluorescent whitening agent, products produced by regular manufacturers should be selected, and relevant environmental protection certifications and test reports should be checked.
In conclusion, fluorescentwhitening agent OB-1 has important application value in polyester staple fiber.Through reasonable application methods and controlling the addition amount, thewhiteness and appearance quality of polyester staple fiber can be significantlyimproved to meet the needs of different fields. At the same time, attentionshould be paid to environmental protection requirements and compatibility withother additives during use to ensure the quality and safety of the fiber.