Comparison and analysis of fluorescent whitening agent 127, OB and OB-1

With the price of fluorescent whitening agent OB climbing to a new high frequently, many companies who use fluorescent whitening agent OB for plastic whitening can't afford the high price and cost of fluorescent whitening agent OB. Some companies don't add fluorescent whitening agent to plastics, and some companies use fluorescent whitening agent CBS-127 instead, because the price of fluorescent whitening agent CBS-127 is only half of that of fluorescent whitening agent OB, and the addition amount is basically the same. The problem that fluorescent whitening agent OB can solve can also be basically achieved.


If so, will fluorescent whitening agent OB withdraw from the stage of plastic additives? No, of course, because the optical brightener 127 has its own advantages, it can replace the optical brightener OB, but the disadvantages of the optical brightener 127 are also fatal, which makes it impossible for the optical brightener 127 to completely replace the optical brightener ob. So what are the advantages and disadvantages of the fluorescent whitening agent 127?  Why can it replace fluorescent whitening agent OB but not completely? It is necessary to understand the advantages and disadvantages of fluorescent whitening agent 127. Here is a brief analysis for you.


Table 1: Comparison Table of Items and Prices

Item                  Price ratio

127                    0.2

OB                      1

KCB                    1.26

OB-1                    0.5


Comparison of fluorescent whitening agent CBS-127 and OB-1

Fluorescent whitening agent 127, also known as fluorescent whitening agent (CI: 378), is mainly used for whitening PVC whitening agent and artificial leather, especially for all kinds of plastics and plastic products. Fluorescent whitening agent 127 is cheap, the price is basically the same as that of fluorescent whitening agent OB-1.   Compared with fluorescent whitening agent OB-1, fluorescent whitening agent 127 has no migration problem, and it is easier to mix evenly than fluorescent whitening agent OB-1. However, the temperature resistance of fluorescent whitening agent 127 is not as strong as that of fluorescent whitening agent OB-1, but the temperature resistance of fluorescent whitening agent 127 is 220 degrees, and it can completely meet the pvc production environment. So can we use OB-1 to whiten PVC?


Sure, but first, you have to do experiments to make sure that your own blending equipment can fully blend OB-1. Using fluorescent whitening agent OB-1 as plastic whitening additive, the blending time is about three times that of fluorescent whitening agent 127, and you have to add dispersant, which is beneficial to the dispersion and blending of fluorescent whitening agent OB-1, which is also a cost.



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Table 2: Comparison Table of ITEMS & Temperature Resistance

ITEM                Temperature resistance

OB-1                 350℃

KCB                   215℃

KSN                  275℃

127                   220℃


Comparison of fluorescent whitening agent CBS-127 and OB

Compared with fluorescent whitening agent OB, the disadvantage of fluorescent whitening agent 127 is instability. In outdoor environment, the whitening effect decreases rapidly, and after 20 days, the whitening effect is only 40% of the original one. However, the price of fluorescent whitening agent 127 is only 50% of that of fluorescent whitening agent OB. So, isn't it impossible to replace fluorescent whitening agent OB with fluorescent whitening agent 127?   Let's talk it start with your country's business environment.


For examle, in China, as we all know, many pvc plastics industries are related to the construction industry. There are many practical pvc pipes for water supply and drainage, especially sewage pipes. These pipes are basically buried underground, so it doesn't matter whether they are white or not. However, as a purchaser, when purchasing in the market, they can really see them. When the two products are compared, the water is black and white at a glance, and they make decisions with their butts without knowing it. Buy the color you like, and naturally choose the whiter one, because the whiter one corresponds to the purer one, and the best materials are also used. Therefore, manufacturers try their best to make their products whiter, at least it is the whitest product at the moment the buyer sees it. As for whether it is very white after being buried underground, it doesn't matter.


Fluorescent whitening agent 127 has a strong whitening effect on plastics, and it can last for 15 days with good whiteness, which has already met the market demand. Therefore, from this point of view, fluorescent whitening agent 127 can be used to whiten low-end pvc products, but for those high-end products that users can see every day, it is necessary to use fluorescent whitening agent OB, because the whitening effect of fluorescent whitening agent ob lasts for a long time, and it is not easy to fade in outdoor oxygen and ultraviolet light.


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