Because the migrating fluorescent whitening agent has a pathogenic effect on the human body, it cannot be used in the production of food packaging paper. When paper mills switch from producing fluorescent paper to producing non-fluorescent paper, it is necessary to add a fluorescent eliminator to eliminate residual fluorescent agents in the water circulation system and on the stock storage equipment. At the same time, it is also often used in the destruction of fluorescent agents in broke, recycled fibers and deinked pulp.
1 Mechanism of fluorescence elimination The mechanism of action of the fluorescence-eliminating agent is not to destroy and remove the fluorescent molecules. The fluorescence-eliminating agent and the fluorescent agent do not undergo a chemical reaction and do not change the structure of the functional group in the fluorescent molecule. It can only inhibit the fluorescence of the fluorescent agent. nature.
2. Fluorescence Elimination Effect Evaluation 2.1 Fluorescence Whiteness A non-fluorescence whiteness difference method uses a whiteness meter to test the fluorescence brightness and non-fluorescent brightness of paper. The smaller the ratio between the difference and the non-fluorescence brightness, the smaller the paper The lesser the relative amount of residual fluorescent agent is. The evaluation of the fluorescence-eliminating effect is a comparison of the difference between the fluorescence whiteness and the non-fluorescent whiteness of the two papers before and after the addition of the fluorescence-removing agent, that is, relative fluorescence (%) two (ARF/ARM)/100%. The smaller the ratio, the better the fluorescence elimination effect (if the fluorescence whiteness is less than the non-fluorescence whiteness, AR is counted as 0). 2.2 Detector Observe the Change of Paper Fluorescence Point (Recommended)
3.Laboratory evaluation method: 3.1 When the production system is not treated with fluorescence: Simulate the production process in the laboratory, namely: Slurry→Brightener→Sizing agent→Filler→Fluorescence Elimination Agent→Aluminum Phosphor to 4.5→ Sheet-producing→Drying→Measurement of fluorescence brightness and non-fluorescent whiteness (0%, 0.5%, 1.0%, 1.5% of fluorescent killer dosage) 3.2 Non-fluorescent treatment of broke: Slurry preparation: as needed The fluorescent paper that has not been used is weighed and crushed with a disintegrator. The degree of beating is controlled within a range of 35 to 40oSR, and then it is formulated into a slurry having a concentration of 3%. Fluorescence eliminator dissolution: The fluorescence eliminator was weighed as required and diluted to a desired concentration (100 times) of a fluorescence eliminator solution using deionized water. Fluorescence elimination step: add a certain amount of slurry in a beaker equipped with a stirrer, and simultaneously add a certain amount of a fluorescent elimination agent solution to the slurry, and then start the stirrer to control the stirring speed in the range of 150 to 200r/min The temperature of the slurry in the beaker is controlled using a water bath (production system temperature). After the slurry and the fluorescent deactivator are mixed for a certain period of time (for example, 20 minutes), the beaker is taken out and immediately paper-formed on a sheet former. The wet sheet is dried at a temperature of 95 to 105°C, and the sheet is controlled quantitatively. 80 g / m2.
4. Factors that affect the effect of fluorescence elimination:
4.1 Below the beating degree 50SR°, the degree of beating increases, but the trend of change is getting smaller and smaller. 4.2 The fluorescence suppression effect in acid sizing is better than that of neutral sizing, that is, the appropriate pH range of the fluorescence eliminator is 4-7. 4.3 With the increase in the amount of filler, the effect of fluorescence elimination gradually increased, but the trend of change was small. 4.4 There is a large relationship between the fluorescence elimination effect and the residual fluorescent agent content in the slurry. The less the residual fluorescent agent, the better the fluorescence elimination effect. 4.5 Under acidic papermaking conditions, it is appropriate to use 4S brighteners, which have better whitening effect than 6s. 4.6 With the increase of anionic disperse rosin amount, the effect of fluorescence reduction gradually decreases. Because the fluorescence-removing agent is cationic, it reacts with the anionic rosin gum to reduce its use effect. 4.7 With the increase of the amount of fluorescence-removing agent, the whiteness and non-fluorescent whiteness of the paper gradually decreased, the decreasing trend of the fluorescence whiteness was greater than the non-fluorescent whiteness, and the fluorescence-eliminating effect was gradually improved. At the dosage of 1.0%, the paper only has a trace amount of permissible fluorescence. 4.8 When using the fluorescence eliminator, it is necessary to select the additive point reasonably, and to avoid the interference of the anion material.
5. Production applications: 5.1 Production process conditions Fluorescence eliminators were added continuously after dilution (75 times). The addition point was a high position box, and the dosage was gradually reduced from 5kg/t paper to 2.5kg/t paper. 5.2 Place a banknote validator on the machine table during production, observe the change of the paper's fluorescent point at any time, and adjust the amount of the fluorescent elimination agent in time. 5.3 Food Packaging Paper and/or cigarette paper is a relatively delicate product. During the production process, it must not come into contact with objects that contain fluorescent substances. The cutting and selection of different types of paper on the same site is inevitably affected by other types of paper. interference.
Jining Taihua Fluorescent Elimination Agent tava-701 is an efficient and environmentally friendly fluorescent elimination product. It is widely used in food paper (card), cigarette card, food packaging paper, release paper, household paper, maternal and infant paper and other materials. There are paper types with fluorescent residue. The main scope of application: 1, for papermaking wet end to eliminate the fluorescence caused by the raw materials in the system; 2, for loss of paper, recycled fibers and deinking pulp in the elimination of fluorescence, 3, effectively eliminate the water circulation system and slurry storage Residual fluorescence on the equipment. 4. Elimination of fluorescent substances caused by the reuse of white water when pulping. 5, in some cases can also be used for surface addition. This product is used to produce or change production of non-fluorescent content paper.
Application Performance â—† Wet end: This product is mainly used to eliminate fluorescence when it is wet or broken. If you want to quickly eliminate fluorescence, you can add more points.
â—†Surface sizing: This product can also be used when surface sizing, but it requires careful evaluation before use to ensure that this product is suitable for each component of starch surface sizing scheme, and this product will not sizing the surface Any material used on the paper roll has side effects that can be used.
â—†Coating: It needs to be evaluated before use when used in coating.
Product advantages This product can effectively eliminate fluorescent brighteners in the following situations:
â—† Low-fluorescence paper This product can effectively eliminate fluorescence in low-fluorescence paper.
â—†Paper grade change This product can effectively reduce the time when the paper machine changes from high-fluorescence paper to low-fluorescence paper.
â—† Loss of Paper Treatment When the fluorescence of the broke paper is higher than the fluorescence required to produce the paper, this product can effectively eliminate the fluorescence at the time of paper breakage.
â—† Compared with other similar products, this product has high performance and is economical and practical.
Storage â—† Stored in cool temperatures for 9 months.
â—† Avoid contact with strong oxidizing and strong acidic materials during storage.
Danger Before using this product, please refer to the safety data sheet.
1 Mechanism of fluorescence elimination The mechanism of action of the fluorescence-eliminating agent is not to destroy and remove the fluorescent molecules. The fluorescence-eliminating agent and the fluorescent agent do not undergo a chemical reaction and do not change the structure of the functional group in the fluorescent molecule. It can only inhibit the fluorescence of the fluorescent agent. nature.
2. Fluorescence Elimination Effect Evaluation 2.1 Fluorescence Whiteness A non-fluorescence whiteness difference method uses a whiteness meter to test the fluorescence brightness and non-fluorescent brightness of paper. The smaller the ratio between the difference and the non-fluorescence brightness, the smaller the paper The lesser the relative amount of residual fluorescent agent is. The evaluation of the fluorescence-eliminating effect is a comparison of the difference between the fluorescence whiteness and the non-fluorescent whiteness of the two papers before and after the addition of the fluorescence-removing agent, that is, relative fluorescence (%) two (ARF/ARM)/100%. The smaller the ratio, the better the fluorescence elimination effect (if the fluorescence whiteness is less than the non-fluorescence whiteness, AR is counted as 0). 2.2 Detector Observe the Change of Paper Fluorescence Point (Recommended)
3.Laboratory evaluation method: 3.1 When the production system is not treated with fluorescence: Simulate the production process in the laboratory, namely: Slurry→Brightener→Sizing agent→Filler→Fluorescence Elimination Agent→Aluminum Phosphor to 4.5→ Sheet-producing→Drying→Measurement of fluorescence brightness and non-fluorescent whiteness (0%, 0.5%, 1.0%, 1.5% of fluorescent killer dosage) 3.2 Non-fluorescent treatment of broke: Slurry preparation: as needed The fluorescent paper that has not been used is weighed and crushed with a disintegrator. The degree of beating is controlled within a range of 35 to 40oSR, and then it is formulated into a slurry having a concentration of 3%. Fluorescence eliminator dissolution: The fluorescence eliminator was weighed as required and diluted to a desired concentration (100 times) of a fluorescence eliminator solution using deionized water. Fluorescence elimination step: add a certain amount of slurry in a beaker equipped with a stirrer, and simultaneously add a certain amount of a fluorescent elimination agent solution to the slurry, and then start the stirrer to control the stirring speed in the range of 150 to 200r/min The temperature of the slurry in the beaker is controlled using a water bath (production system temperature). After the slurry and the fluorescent deactivator are mixed for a certain period of time (for example, 20 minutes), the beaker is taken out and immediately paper-formed on a sheet former. The wet sheet is dried at a temperature of 95 to 105°C, and the sheet is controlled quantitatively. 80 g / m2.
4. Factors that affect the effect of fluorescence elimination:
4.1 Below the beating degree 50SR°, the degree of beating increases, but the trend of change is getting smaller and smaller. 4.2 The fluorescence suppression effect in acid sizing is better than that of neutral sizing, that is, the appropriate pH range of the fluorescence eliminator is 4-7. 4.3 With the increase in the amount of filler, the effect of fluorescence elimination gradually increased, but the trend of change was small. 4.4 There is a large relationship between the fluorescence elimination effect and the residual fluorescent agent content in the slurry. The less the residual fluorescent agent, the better the fluorescence elimination effect. 4.5 Under acidic papermaking conditions, it is appropriate to use 4S brighteners, which have better whitening effect than 6s. 4.6 With the increase of anionic disperse rosin amount, the effect of fluorescence reduction gradually decreases. Because the fluorescence-removing agent is cationic, it reacts with the anionic rosin gum to reduce its use effect. 4.7 With the increase of the amount of fluorescence-removing agent, the whiteness and non-fluorescent whiteness of the paper gradually decreased, the decreasing trend of the fluorescence whiteness was greater than the non-fluorescent whiteness, and the fluorescence-eliminating effect was gradually improved. At the dosage of 1.0%, the paper only has a trace amount of permissible fluorescence. 4.8 When using the fluorescence eliminator, it is necessary to select the additive point reasonably, and to avoid the interference of the anion material.
5. Production applications: 5.1 Production process conditions Fluorescence eliminators were added continuously after dilution (75 times). The addition point was a high position box, and the dosage was gradually reduced from 5kg/t paper to 2.5kg/t paper. 5.2 Place a banknote validator on the machine table during production, observe the change of the paper's fluorescent point at any time, and adjust the amount of the fluorescent elimination agent in time. 5.3 Food Packaging Paper and/or cigarette paper is a relatively delicate product. During the production process, it must not come into contact with objects that contain fluorescent substances. The cutting and selection of different types of paper on the same site is inevitably affected by other types of paper. interference.
Jining Taihua Fluorescent Elimination Agent tava-701 is an efficient and environmentally friendly fluorescent elimination product. It is widely used in food paper (card), cigarette card, food packaging paper, release paper, household paper, maternal and infant paper and other materials. There are paper types with fluorescent residue. The main scope of application: 1, for papermaking wet end to eliminate the fluorescence caused by the raw materials in the system; 2, for loss of paper, recycled fibers and deinking pulp in the elimination of fluorescence, 3, effectively eliminate the water circulation system and slurry storage Residual fluorescence on the equipment. 4. Elimination of fluorescent substances caused by the reuse of white water when pulping. 5, in some cases can also be used for surface addition. This product is used to produce or change production of non-fluorescent content paper.
Application Performance â—† Wet end: This product is mainly used to eliminate fluorescence when it is wet or broken. If you want to quickly eliminate fluorescence, you can add more points.
â—†Surface sizing: This product can also be used when surface sizing, but it requires careful evaluation before use to ensure that this product is suitable for each component of starch surface sizing scheme, and this product will not sizing the surface Any material used on the paper roll has side effects that can be used.
â—†Coating: It needs to be evaluated before use when used in coating.
Product advantages This product can effectively eliminate fluorescent brighteners in the following situations:
â—† Low-fluorescence paper This product can effectively eliminate fluorescence in low-fluorescence paper.
â—†Paper grade change This product can effectively reduce the time when the paper machine changes from high-fluorescence paper to low-fluorescence paper.
â—† Loss of Paper Treatment When the fluorescence of the broke paper is higher than the fluorescence required to produce the paper, this product can effectively eliminate the fluorescence at the time of paper breakage.
â—† Compared with other similar products, this product has high performance and is economical and practical.
Storage â—† Stored in cool temperatures for 9 months.
â—† Avoid contact with strong oxidizing and strong acidic materials during storage.
Danger Before using this product, please refer to the safety data sheet.