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ShanDong Qi Tai chemical Co., Ltd.

Qi Tai chemical Co., Ltd.—14 Yearsoptical brightener manufacturers, stable quality and competitive price.

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optical brightener OB 184
optical brightener OB 184
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Advantages and disadvantages of

Fluorescent whitening agent 127 is also called fluorescent whitening agent (378). Mainly used for PVC, artificial leather and other plastic and plastic products have a good whitening effect. For the application of PVC plastic products, I believe that most of the boss will not be unfamiliar, in the current situation, can be used in PVC plastic products whitening agent is the best model of fluorescent whitening agent 127. Some bosses may wonder why fluorescent whitening agent 127 is the most suitable for PVC as there are so many kinds of fluorescent whitening agent. This requires a better understanding of the advantages and disadvantages of optical brightener 127. In terms of price, The price of optical brightener 127 is higher than that of ob-1. However, the weatherability of the optical brightener ob-1 is poor, which affects the final use effect of the product. The price of optical brightener 127 is lower than that of products such as OB and KCB. And the price range is very big, some even more than two to three times. Table 1: model price comparison table Type price 127 0.4 OB 1 KCB 1.26 OB-1 0.3 In terms of temperature tolerance, Each fluorescent whitening agent has its own maximum temperature tolerance value, beyond which the fluorescent whitening agent will decompose and become invalid, so the process temperature directly restricts the selection of fluorescent whitening agent. PVC is one of the largest general plastic production in the world, a wide range of applications in building materials, industrial products, daily necessities, leather pipe, plate, wire and cable, foaming material and so on are widely used, the highest production process of PVC temperature within the 200 degrees, fluorescent whitening agent 127 heat resistance at 210 degrees, so completely from the process can be applied. Table 2: comparison table of model temperature resistance Type T llimitation OB-1 350℃ KCB 215℃ KSN 275℃ 127 220℃ In terms of weather resistance, Among all types of brightener, optical brightener 127 has a general weathering resistance. However, fortunately, optical brightener 127 has excellent weathering resistance among PVC plastic products. The products have good whiteness and are not easy to migrate. For weathering resistance, the weathering resistance of optical brightener is better than that of ob-1, and lower than that of products such as OB or KCB. Table 3: model stability comparison table Type stabelity OB-1 Poor KCB good KSN good 127 Poor To sum up, from the perspective of temperature resistance, weather resistance, price and other comprehensive factors, fluorescent whitening agent 127 is the best cost-effective product for PVC, with low price, good whitening effect and lasting whitening effect. Therefore, the choice of fluorescent whitening agent 127 is the best choice for PVC industry, which is determined by the advantages and disadvantages of fluorescent whitening agent 127.

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Advantages and disadvantages of

The optical brightener ob-1 is cheap and has a good whitening effect on plastics. So why do some industries use the optical brightener ob-1, while some plastics industries use the optical brightener KCB and the optical brightener ob? If you are using the optical brightener KCB or the optical brightener ob, are you also wondering whether I can use the optical brightener ob-1? If not, why not? Now I will give you a brief analysis of the advantages and disadvantages of the optical brightener ob-1. After reading the article, you will know when to use ob-1 and when not to use ob-1, but only the optical brightener ob or the optical brightener KCB. From the point of view of temperature tolerance Fluorescent brightener ob - 1 the heat resistance of 350 degrees, this is all the highest product of heat-resistant, fluorescent whitening agent for production of high temperature resistant plastic bosses, can only use ob - 1, because in the present case, optical brightener ob - 1, is that all the whitening agent products, heat resistant performance is the best product, and the optical brightener ob - 1 small amount of adding whitening degree is high. For many bosses who use brighteners, that may be in doubt. Why high temperature resistance, low dosage and good whiteness ob-1? Cannot be used in all plastic products. This requires understanding the advantages and disadvantages of the optical brightener ob-1. As is known to all, plastic industry is a very broad industry, fluorescent whitening agent used in plastic industry is a wide range of features numerous industry, most of the manufacturing process of mold temperature is higher, some even reached more than 300 degrees, at present also only able to withstand a optical brightener ob - 1, 350, this is a fluorescent whitening agent is the biggest advantage of ob - 1, because is the plastic brightener ob - 1 in the highest heat resistance. It can reach over 350 degrees, which is applicable to almost all plastics, and its optical brightener is not available. This is a great advantage of the optical brightener ob-1. The following is the temperature tolerance limit of common plastic optical brightener. This table clearly shows the temperature limits of common plastic optical brighteners. Type T limitation OB-1 350℃ KCB 215℃ KSN 275℃ 127 220℃ From the fluorescent color light emitted, Fluorescent whitening agent of different products or the same products have many colours, some fluorescent whitening agent blue light, have a plenty of bright blue, LanZiGuang, blue green, etc., because of the nature of most raw materials are yellow, and Huang Guangjia blue light visible to the naked eye as the white light, so the heavier the blu-ray brightening agent, fluorescent effect better, better whitening effect, adding quantity is less, optical brightener OB - 1 is divided into green color products are known as the green phase, another is yellow color appearance product called yellow phase, the green fluorescence slant blue, yellow, partial LanZiGuang commonly so if there is no special requirement to buy green products, Do not buy the product of yellow photograph, the price of these two kinds of article photograph is same at present. At present, the use of optical brightener ob-1 green phase is in the majority, but the green blue light is not as strong as the blue light emitted by ob KCB and other products, but it also has a good fluorescence intensity and whitening effect. In terms of color light, the optical brightener ob-1 does not win, but it does not lose too much. Type light color OB-1 Blue KCB Blue KSN Red 127 Red In terms of product stability The biggest disadvantage of the optical brightener ob-1 is its poor weather resistance. Under the same amount of addition and the same temperature and humidity, the optical brightener ob-1 has the largest migration and precipitation amount, and the product is more likely to return to yellow. If there is a high requirement for the final stability of the product, for example, the shoe material product can only use KCB, because KCB has a good resistance to migration and precipitation performance, so the optical brightener ob-1 cannot be used. Type stability OB-1 Poor KCB good KSN good 127 poor To sum up, although ob-1 is a good product in terms of temperature resistance, color light, dosage and whitening effect, its stability and weather resistance show that its downstream application effect is poor and it is easy to separate out, resulting in various after-sales and unsalable products.

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Plastic optical brightener has

plastic with fluorescent whitening agent should have the property of fluorescent whitening agent is a kind of fluorescent dye, also some information called it a white dye or colorless dye, there are other information according to its in plastic mainly used to change the appearance of the characteristics of this feature, called the plastic coloring special pigment. There are two main types of commercially available optical brighteners: one is similar to common water-soluble dyes and is widely used in textiles; Another kind of insoluble in water, but soluble in organic solvents, this kind of fluorescent whitening agent is suitable for plastic. But to be used for plastic whitening, according to the performance of plastic, processing characteristics and special requirements for use, the selected fluorescent whitening agent should also have the following properties: (1) whitening effect is better. High whiteness is the main embodiment of the whitening effect of fluorescent whitening agent, the advantages of high whiteness is not only reflected in the appearance of plastic, but also will produce a lot of advantages, such as high whiteness can reduce the amount of use, thus can prevent the change of plastic strength, but also reduce the cost. (2) high temperature stability. Because the melting temperature of the plastic products of plasticizing shape is general need in the high temperature of 150 ~ 280 ℃, so the requirement of fluorescent whitening agent does not decompose in the temperature range, color changing and losing whitening effect. (3) high sublimation fastness and sun fastness to climate. Because in recent years in the building materials and advertising industry a large number of white plastic, which requires the use of optical brightener with excellent heat sublimation and resistance to sunlight and other climatic conditions of the performance. The climate fastness of fluorescent whitening agent is affected by the structure of fluorescent whitening agent and is related to the amount of fluorescent whitening agent. (4) it has good compatibility with plastics and good dispersion in it. This is necessary to ensure that the plastic is uniformly whitened. The molecular dispersion or total solubility of fluorescent whitening agents is very important to achieve high efficiency optical whitening. If use optical brightener to dye white goods, first put optical brightener into the resin carrier for concentration, this concentration is usually called masterbatch or masterbatch, and then use masterbatch to color a large number of polymers, its dispersion and optical effect are much better than the resin directly added with optical brightener. Another example is the very low concentration of water insoluble fluorescent whitening agents dispersed in water, they will show good optical effect in nylon and polyester fiber; Adding the optical brightener directly to the melt of the polymer prepared for drawing showed no optical effect. This is because water is dispersed for absorption, which dissolves the fluorescent whitening agent in the form of molecules in the polymer matrix, while the fluorescent whitening agent mixed into the polymer melt body can only be dispersed in the form of aggregates in the melt body at most. For the poor dispersion in plastics such as optical brightener colorant, in order to better dispersion, it is generally necessary to carry out secondary processing, that is, in the colorant to add a certain amount of processing agent or dispersant, so that it has a good dispersion of colorant. In addition to improving the dispersibility of the optical brightener, the choice of treatment or dispersing agent should not cause the degradation of the physical properties of the plastics. (5) good solvent resistance, migration resistance and chemical stability, no exudation and extraction. In contact with solvents or products containing plasticizers, they will not migrate due to dissolution. Good acid and alkaline resistance, and other additives in plastic do not occur harmful chemical reactions. (6) it has no influence on the processing (such as fluidity, lubricity, printing and finishing) of plastics and their performance (such as electrical performance, physical and mechanical performance, aging resistance, etc.). (7) it shall be resistant to chemicals and electrically insulating. (8) should be non-toxic, tasteless. This requirement for the food industry, the toy industry for fluorescent whitening agent is particularly important, it is related to peoples health and life safety. In some countries, there are strict regulations on optical brighteners used in the food and toy industries. Above a few points are to plastic use optical brightener more comprehensive requirement, have the breed with all these requirements commonly very few, when using so, should wait for specific circumstance to choose according to the purpose that USES, environment element.

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Use of plastic optical brighten

Plastic is the most important material with synthetic or natural macromolecular compound as the basic component, which can be molded in the process, and the product can keep the same shape in the end. Most of these plastics are based on synthetic resins. Because plastic kind is various, its classification method also has a variety of, according to component property can be divided for cellulose plastics, protein plastics and synthetic resin plastics; According to the use can be divided into general plastic and engineering plastics; Thermoplastics and thermosetting plastics can be divided into two categories in terms of plasticizing and performance changes after heating. The last of these is the most common classification method. Because the plastic is generally has qualitative light, insulation, corrosion resistance, friction resistance, easy processing, beautiful wait for a characteristic, as a structural material and insulation material, so in the aerospace, automobile, shipbuilding, machinery, chemical industry, construction and daily necessities and other industries widely used, many plastic products have replaced the metal products, wood products, it can be seen everywhere. The rapid development of plastic industry has also promoted the development of plastic coloring technology. Plastic coloring has become an important part of modern plastic processing. Gorgeous and dazzling plastic products enrich the market and beautify our environment and life. According to statistics, about 80% of all the plastic products is after staining (mass fraction), the white occupied large proportion of plastic products, for example, we see everyday of window of model steel door, fluctuation conduit with white mostly, these products look so white, one important reason is the use of the fluorescent whitening agent. White objects generally have a slight absorption of blue light on the short-wave side of visible light, so they often contain a yellowish color, which affects the whiteness and gives people an old and dirty feeling. The same is true for white plastics, where one of the most effective ways to eliminate the yellowish tint (often caused by certain stabilizers and other additives) is to add optical brighteners. Fluorescent whitening agent to absorb ultraviolet light, and then in the violet light emitted in the form of fluorescence, for plastic light yellow colored and violet light are complementary, and make the plastic tooth whitening, this is the principle of fluorescent whitening agent on the plastic tooth whitening effect, whitening result is to improve the whiteness of plastic, do not reduce brightness again, let a person look more white, bright beautiful, pleasing to the eye. In addition, the addition of a small amount of fluorescent whitening agent in ordinary pigments can increase the brightness of color and make the color of the shader shine. According to incomplete statistics, more than 5% of the worlds output of optical brightener is used in synthetic materials such as plastics. In order to improve the processing performance and the appearance of the products, a certain amount of chemicals with special functions are often added in the processing of plastics. Plastics processing AIDS is A lot of more phyletic, the mechanism is quite complex, because of some additives whitening effect of fluorescent whitening agent, such as titanium dioxide is the white pigment tinting strength strongest variety, in opaque white plastic has A very important role, it has the rutile type (R) and sharp titanium type (type A) two types of crystal morphology, its different forms A great influence on whitening effect of fluorescent whitening agent. Therefore, the choice of additives should pay attention to the compatibility with the selected optical brightener, the amount of additives should be based on the product performance and the amount of optical brightener.

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