Ultralow-temperature fixing toner and preparation method thereof

Abstract

The invention discloses an ultralow-temperature fixing toner and a preparation method thereof. The ultralow-temperature fixing toner is prepared from the following raw materials in parts by weight: 60-100 parts of modified polybutylene terephthalate; 40 to 80 parts of PETG (polyethylene terephthalate glycol); 2-8 parts of a dispersant; 10 to 30 parts of carbon black; 1-3 parts of an antioxidant; the modified polybutylene terephthalate is prepared from the following raw materials: polybutylene terephthalate, starch, glycerol, sodium hexametaphosphate, calcium carbonate and calcium stearate. The present application has an effect of reducing the fixing temperature of the toner.

Description

Technical Field

[0001] The present invention relates to the field of toners, and in particular to a toner for ultra-low temperature fixing and a preparation method thereof. Background Art

[0002] The fixing method of images in copiers, printing presses, etc. usually adopts a heat fixing method; the binder of the electrophotographic toner used in the heat fixing method requires that the toner can be fixed even at a low fixing temperature (low temperature fixability), and also requires storage stability.

[0003] However, most of the toners on the current market need to be fixed at a relatively high temperature, which not only increases energy consumption, but also may cause the equipment to overheat during the printing process, thereby affecting the equipment life and printing quality.

[0004] Therefore, developing a toner that can be fixed under ultra-low temperature conditions has become an urgent need in the industry. Summary of the Invention

[0005] In order to reduce the fixing temperature of the toner, the present application provides a toner for ultra-low temperature fixing and a preparation method thereof.

[0006] In the first aspect, the toner for ultra-low temperature fixing provided by the present application adopts the following technical solution: A toner for ultra-low temperature fixing, which is made of the following raw materials in parts by weight: 60-100 parts of modified polybutylene terephthalate; 40-80 parts of PETG; 2-8 parts of a dispersant; 10-30 parts of carbon black; 1-3 parts of an antioxidant; the modified polybutylene terephthalate is made of the following raw materials: polybutylene terephthalate, starch, glycerol, sodium hexametaphosphate, calcium carbonate and calcium stearate.

[0007] By adopting the above technical solution, PETG and modified polybutylene terephthalate are used as carriers, carbon black is added as a pigment, and by modifying polybutylene terephthalate, the compatibility between the modified polybutylene terephthalate and PETG is good, and with carbon black having good stability, it is beneficial to the uniform dispersion of each component and reduces the lowest fixing temperature of the toner.

[0008] Preferably, the preparation method of the modified polybutylene terephthalate is: mixing 80-120 parts by weight of starch, 10-30 parts by weight of glycerol, 10-20 parts by weight of polybutylene terephthalate and 5-15 parts by weight of sodium hexametaphosphate, stirring evenly, drying and pulverizing, and then mixing and stirring with 50-90 parts by weight of calcium carbonate and 5-15 parts by weight of calcium stearate, and obtaining the modified polybutylene terephthalate after melt blending and pelletizing.

[0009] By adopting the above technical solutions, glycerol and sodium hexametaphosphate enable better compatibility between starch and polybutylene terephthalate. Polybutylene terephthalate penetrates into the starch chain segments, sodium hexametaphosphate crosslinks the starch, and calcium carbonate fills on the surface of polyethylene terephthalate glycol, thereby improving the toughness and processing stability of polybutylene terephthalate, being conducive to enhancing the stability of the toner, reducing the influence of the toner by high-temperature and high-humidity environments, and enabling the toner to achieve fixing in a lower-temperature environment.

[0010] Preferably, the weight ratio of the polybutylene terephthalate, starch, sodium hexametaphosphate, and calcium stearate is (0.16 - 0.18):1:(0.11 - 0.15):(0.06 - 0.08).

[0011] By adopting the above technical solutions, when the polybutylene terephthalate, starch, sodium hexametaphosphate, and calcium stearate are in a specific weight ratio, the four cooperate together, which can further reduce the minimum fixing temperature and adhesion of the toner, thereby improving the stability performance of the toner.

[0012] Preferably, the carbon black is modified carbon black, and the preparation method of the modified carbon black is as follows: Mix 10 - 20 parts by weight of barium sulfate and 20 - 30 parts by weight of carbon black, first perform ultrasonic dispersion with 200 - 300 parts by weight of hydrochloric acid solution, then add 5 - 15 parts by weight of tetraethyl orthosilicate, wash and dry, then add 2 - 8 parts by weight of KH - 570 and heat and mix, and after drying, add 5 - 15 parts by weight of epoxy resin and 1 - 3 parts by weight of trimethylethylenediamine and mix and stir. After curing, the modified carbon black is obtained.

[0013] By adopting the above technical solutions, mixing barium sulfate and carbon black effectively prevents pigment agglomeration. The toner acts on the coating surface to improve the mechanical strength of the coating. Tetraethyl orthosilicate improves the adhesion between carbon black and epoxy resin, thereby improving the adhesion of the toner. Trimethylethylenediamine is used as a curing agent to adjust the curing speed of epoxy resin, making the connection between epoxy resin and carbon black closer, which is conducive to reducing the fixing temperature of the toner and its adhesion to the fixing roller.

[0014] Preferably, the weight ratio of the barium sulfate, carbon black, and epoxy resin is (1.2 - 1.5):(2.6 - 2.8):1.

[0015] By adopting the above technical solutions, when the barium sulfate, carbon black, and epoxy resin are in a specific weight ratio, the three cooperate together. Barium sulfate and carbon black are evenly dispersed in epoxy resin, and the surface polymerization of epoxy resin with barium sulfate and carbon black is initiated by the curing agent, which is further conducive to reducing the fixing temperature of the toner.

[0016] Preferably, the weight ratio of the modified polybutylene terephthalate, PETG and modified carbon black is (1.76 - 1.92):1:(0.36 - 0.48).

[0017] By adopting the above technical solution, when the modified polybutylene terephthalate, PETG and modified carbon black are in a specific weight ratio, the modified carbon black is uniformly dispersed in the components, improving the dispersibility of the toner and being beneficial to reducing the fixing temperature and heat resistance stability of the toner.

[0018] Preferably, the dispersant includes one of polyethylene wax and zinc stearate.

[0019] Preferably, the antioxidant includes one of antioxidant 168 and antioxidant 1010.

[0020] By adopting the above technical solution, selecting suitable dispersants and antioxidants helps to reduce the fixing temperature of the toner.

[0021] In the second aspect, a toner for ultra-low temperature fixing provided by the present application adopts the following technical solution: A preparation method of a toner for ultra-low temperature fixing, comprising the following steps: mixing and stirring the modified polybutylene terephthalate, PETG, dispersant, antioxidant and carbon black, and pulverizing after melt-kneading to obtain the toner.

[0022] By adopting the above technical solution, it is beneficial to obtain a toner that is less affected by high temperature and high humidity environments, has good stability and can be fixed at low temperature.

[0023] Preferably, by adopting the above technical solution, selecting a suitable particle size range is beneficial to the melt flow of the toner on the one hand and the uniform and stable adhesion of the anti-blocking agent on the outer peripheral side of the toner masterbatch on the other hand.

[0024] In summary, the present application has the following beneficial technical effects: 1. PETG and modified polybutylene terephthalate are used as carriers, and carbon black is added as a pigment. By modifying the polybutylene terephthalate, the modified polybutylene terephthalate has good compatibility with PETG, and combined with carbon black with good stability, it is beneficial to the uniform dispersion of each component and reduces the lowest fixing temperature of the toner.

[0025] 2. Glycerol and sodium hexametaphosphate make the compatibility between starch and polybutylene terephthalate better. Polybutylene terephthalate penetrates into the starch chain segments. Sodium hexametaphosphate crosslinks the starch, and calcium carbonate is filled on the surface of polyethylene terephthalate glycol, thereby improving the toughness and processing stability of polybutylene terephthalate, being beneficial to improving the stability of the toner, reducing the influence of the toner under high temperature and high humidity environments, and enabling the toner to achieve fixing in a lower temperature environment. Specific Embodiments

[0026] The following further elaborates on this application in conjunction with examples and comparative examples. Examples

[0027] Example 1 A preparation method of a toner for ultra-low temperature fixing includes the following steps: Put 60 g of modified polybutylene terephthalate, 40 g of PETG, 2 g of dispersant, 1 g of antioxidant, and 10 g of carbon black into a high-speed mixer, mix and stir at a temperature of 60 °C and a rotation speed of 800 r / min for 5 min, transfer to a kneader and melt at a temperature of 135 °C, cool to room temperature and then crush into particles, screen to 100 mesh to obtain the toner. PETG is purchased from SK in South Korea, and the product number is PETG K2012; the dispersant is selected as polyethylene wax, purchased from Qi Hong D1016, and the antioxidant is antioxidant 1010.

[0028] The preparation method of the modified polybutylene terephthalate is as follows: Add 80 g of starch, 10 g of glycerol, 10 g of polybutylene terephthalate, and 5 g of sodium hexametaphosphate to a magnetic stirrer, mix and stir evenly at a temperature of 95 °C for 0.5 h, transfer to a drying oven and dry at a temperature of 50 °C for 72 h and then crush to 200 mesh, and then add 50 g of calcium carbonate and 5 g of calcium stearate to a high-speed mixer and mix and stir for 10 min, transfer to an internal mixer and carry out internal mixing and granulation at a temperature of 160 °C and a rotation speed of 75 r / min to obtain the modified polybutylene terephthalate. Polybutylene terephthalate is purchased from DuPont in the United States, and the product number is S650FR NC010.

[0029] Example 2 A preparation method of a toner for ultra-low temperature fixing includes the following steps: 100 g of modified polybutylene terephthalate, 80 g of PETG, 8 g of dispersant, 3 g of antioxidant and 30 g of carbon black are all put into a high-speed mixer, and mixed and stirred for 5 min under the conditions of a temperature of 60 °C and a rotation speed of 800 r / min, then transferred to a kneader and melted under the condition of a temperature of 135 °C, cooled to room temperature and then crushed into particles, screened to 100 mesh to obtain a toner. PETG is purchased from SK in South Korea, and the product number is PETG K2012; the dispersant is zinc stearate, and the antioxidant is antioxidant 1010.

[0030] The preparation method of the modified polybutylene terephthalate is as follows: 80 g of starch, 10 g of glycerol, 10 g of polybutylene terephthalate and 5 g of sodium hexametaphosphate are added to a magnetic stirrer, mixed and stirred evenly for 0.5 h under the condition of a temperature of 95 °C, transferred to an oven and dried for 72 h under the condition of a temperature of 50 °C and then crushed to 200 mesh, and then 50 g of calcium carbonate and 5 g of calcium stearate are added to a high-speed mixer and mixed and stirred for 10 min, transferred to an internal mixer and subjected to internal mixing and granulation under the conditions of a temperature of 160 °C and a rotation speed of 75 r / min to obtain the modified polybutylene terephthalate. The polybutylene terephthalate is purchased from DuPont in the United States, and the product number is S650FR NC010.

[0031] Example 3 A preparation method of a toner for ultra-low temperature fixing includes the following steps: 80 g of modified polybutylene terephthalate, 60 g of PETG, 5 g of dispersant, 2 g of antioxidant and 20 g of carbon black are all put into a high-speed mixer, and mixed and stirred for 5 min under the conditions of a temperature of 60 °C and a rotation speed of 800 r / min, then transferred to a kneader and melted under the condition of a temperature of 135 °C, cooled to room temperature and then crushed into particles, screened to 100 mesh to obtain a toner. PETG is purchased from SK in South Korea, and the product number is PETG K2012; the dispersant is polyethylene wax, purchased from Qi Hong D1016, and the antioxidant is antioxidant 168.

[0032] The preparation method of the modified polybutylene terephthalate is as follows: 80 g of starch, 10 g of glycerol, 10 g of polybutylene terephthalate and 5 g of sodium hexametaphosphate are added to a magnetic stirrer, mixed and stirred evenly for 0.5 h under the condition of a temperature of 95 °C, transferred to an oven and dried for 72 h under the condition of a temperature of 50 °C and then crushed to 200 mesh, and then 50 g of calcium carbonate and 5 g of calcium stearate are added to a high-speed mixer and mixed and stirred for 10 min, transferred to an internal mixer and subjected to internal mixing and granulation under the conditions of a temperature of 160 °C and a rotation speed of 75 r / min to obtain the modified polybutylene terephthalate. The polybutylene terephthalate is purchased from DuPont in the United States, and the product number is S650FR NC010.

[0033] Example 4 A preparation method of a toner for ultra-low temperature fixing, which is different from Example 3 in that: the preparation method of the modified polybutylene terephthalate is as follows: add 120 g of starch, 30 g of glycerol, 20 g of polybutylene terephthalate and 15 g of sodium hexametaphosphate into a magnetic stirrer, mix and stir evenly at a temperature of 95 °C for 0.5 h, transfer to an oven and dry at a temperature of 50 °C for 72 h, then crush to 200 mesh, and then add 90 g of calcium carbonate and 15 g of calcium stearate into a high-speed mixer and mix and stir for 10 min, transfer to an internal mixer and carry out internal mixing and granulation at a temperature of 160 °C and a rotation speed of 75 r / min to obtain the modified polybutylene terephthalate.

[0034] Example 5 A preparation method of a toner for ultra-low temperature fixing, which is different from Example 3 in that: the input amount of polybutylene terephthalate is 16 g, the input amount of starch is 100 g, the input amount of sodium hexametaphosphate is 11 g, and the input amount of calcium stearate is 6 g.

[0035] Example 6 A preparation method of a toner for ultra-low temperature fixing, which is different from Example 3 in that: the input amount of polybutylene terephthalate is 18 g, the input amount of starch is 100 g, the input amount of sodium hexametaphosphate is 15 g, and the input amount of calcium stearate is 8 g.

[0036] Example 7 A preparation method of a toner for ultra-low temperature fixing, which is different from Example 6 in that: carbon black is replaced with modified carbon black in equal amount, and the preparation method of the modified carbon black is as follows: mix 10 g of barium sulfate and 20 g of carbon black, first carry out ultrasonic dispersion with 200 g of 0.1 mol / L hydrochloric acid solution for 30 min, then add 5 g of tetraethyl orthosilicate and mix and stir at a temperature of 60 °C for 2 h, wash with deionized water and dry at a temperature of 60 °C, add 2 g of KH-570 and 9 g of distilled water, heat to 80 °C and mix for 2 h, dry at a temperature of 100 °C for 6 h, then add 5 g of epoxy resin and 1 g of trimethylethylenediamine and mix and stir for 10 min, and stand and cure at room temperature to obtain the modified carbon black. The epoxy resin is purchased from Nantong Phoenix, and the grade is E-44.

[0037] Example 8 A preparation method of a toner for ultra-low temperature fixing, which is different from Example 6 in that: the carbon black is replaced with modified carbon black in equal amount, and the preparation method of the modified carbon black is as follows: 20 g of barium sulfate and 30 g of carbon black are mixed, first ultrasonically dispersed with 300 g of 0.1 mol / L hydrochloric acid solution for 30 min, then 15 g of tetraethyl orthosilicate is added and mixed and stirred at a temperature of 60 °C for 2 h, washed with deionized water and dried at a temperature of 60 °C, 8 g of KH-570 and 20 g of distilled water are added and heated to 80 °C and mixed for 2 h, dried at a temperature of 100 °C for 6 h, then 15 g of epoxy resin and 3 g of trimethylethylenediamine are added and mixed and stirred for 10 min, and left to cure at room temperature to obtain the modified carbon black. The epoxy resin is purchased from Nantong Phoenix, with the grade of E-44.

[0038] Example 9 A preparation method of a toner for ultra-low temperature fixing, which is different from Example 8 in that: the input amount of barium sulfate is 12 g, the input amount of carbon black is 26 g, and the input amount of epoxy resin is 10 g.

[0039] Example 10 A preparation method of a toner for ultra-low temperature fixing, which is different from Example 8 in that: the input amount of barium sulfate is 15 g, the input amount of carbon black is 28 g, and the input amount of epoxy resin is 10 g.

[0040] Example 11 A preparation method of a toner for ultra-low temperature fixing, which is different from Example 10 in that: the input amount of modified polybutylene terephthalate is 88 g, the input amount of PETG is 50 g, and the input amount of modified carbon black is 18 g.

[0041] Example 12 A preparation method of a toner for ultra-low temperature fixing, which is different from Example 10 in that: the input amount of modified polybutylene terephthalate is 96 g, the input amount of PETG is 50 g, and the input amount of modified carbon black is 24 g.

[0042] Comparative Example Comparative Example 1 A preparation method of a toner for ultra-low temperature fixing, which is different from Example 3 in that: the modified polybutylene terephthalate is replaced with polybutylene terephthalate in equal amount.

[0043] Comparative Example 2 A preparation method of a toner for ultra-low temperature fixing, which is different from Example 3 in that: the modified polybutylene terephthalate is replaced with polyethylene terephthalate glycol in equal amount.

[0044] Comparative Example 3 A preparation method of a toner for ultra-low temperature fixing, which is different from Example 3 in that: PETG is replaced with PCTG in equal amounts.

[0045] Comparative Example 4 A preparation method of a toner for ultra-low temperature fixing, which is different from Example 3 in that: carbon black is replaced with silicon dioxide in equal amounts.

[0046] Comparative Example 5 A preparation method of a toner for ultra-low temperature fixing, which is different from Example 3 in that: PETG is replaced with modified polybutylene terephthalate in equal amounts.

[0047] Performance detection test: Evaluation of the printed image effect: The toners prepared in Examples 1-12 and Comparative Examples 1-5 were added to the drum powder cartridge of the printer, and the temperature of the fixing roller was raised from 80 °C to 180 °C for a fixing test. During the fixing test, if the fixing effect was unqualified, the temperature was raised and the fixing was carried out again. After the fixing was qualified, the lowest temperature corresponding to the qualified fixing was recorded.

[0048] Heat resistance stability: Weigh 10 g of the toners of Examples 1-12 and Comparative Examples 1-5 in a propylene cup, and let them stand in an environment with a temperature of 50 °C and a humidity of 50% for 24 h. Visually judge the caking situation of the toners, which is divided into three grades A, B, and C from good to bad.

[0049] Printed image stability: The toners prepared in Examples 1-12 and Comparative Examples 1-15 were added to the drum powder cartridge of the printer. In an environment with a temperature of 25 °C and a humidity of 75%, control the temperature of the fixing roller to be 180 °C, and continuously print 2000 images with a printing rate of 5%. Compare the color density value and the background ash value of the first image and the 10000th image. Among them, the higher the color density value, the clearer and more detailed the printed image; the lower the background ash value, the cleaner the background and the smaller the occurrence of unnecessary gray or dirt. In this application, a color density value above 1.35 and a background ash value below 2 are considered qualified. Fixing minimum temperature / °C Heat resistance stability Color density Example 1 104℃ A 1.38 Example 2 106℃ A 1.37 Example 3 103℃ A 1.39 Example 4 103℃ A 1.39 Example 5 98℃ A 1.40 Example 6 97℃ A 1.41 Example 7 94℃ A 1.42 Example 8 95℃ A 1.43 Example 9 92℃ A 1.46 Example 10 91℃ A 1.47 Example 11 87℃ A 1.49 Example 12 86℃ A 1.48 Comparative Example 1 130℃ B 1.19 Comparative Example 2 140℃ A 1.22 Comparative Example 3 145℃ B 1.33 Comparative Example 4 135℃ A 1.26 Comparative Example 5 140℃ B 1.18

[0050] From the data comparison of Examples 1-4 and Comparative Examples 1-5, it can be seen that when PETG and modified polybutylene terephthalate are used as carriers, carbon black is added as a pigment, and by modifying polybutylene terephthalate, the compatibility between modified polybutylene terephthalate and PETG is good, and combined with carbon black with good stability, it is beneficial to the uniform dispersion of each component, reducing the minimum fusing temperature of the toner; glycerol and sodium hexametaphosphate make the compatibility between starch and polybutylene terephthalate better, polybutylene terephthalate interpenetrates into the starch chain segment, sodium hexametaphosphate crosslinks the starch, and calcium carbonate is filled on the surface of polyethylene terephthalate, thereby improving the toughness and processing stability of polybutylene terephthalate, being beneficial to improving the stability of the toner, reducing the influence of high temperature and high humidity environment on the toner, and enabling the toner to achieve fusing in a lower temperature environment.

[0051] From the data comparison of Examples 3-6, it can be seen that when polybutylene terephthalate, starch, sodium hexametaphosphate and calcium stearate are in specific weight ratios, the four cooperate together, which can further reduce the minimum fusing temperature and adhesion of the toner, thereby improving the stability performance of the toner.

[0052] From the data comparison of Examples 6-8, it can be seen that mixing barium sulfate and carbon black effectively prevents pigment agglomeration. The toner acts on the coating surface, improving the mechanical strength of the coating. Tetraethyl orthosilicate improves the adhesion between carbon black and epoxy resin, thereby improving the adhesion of the toner. Triethylenediamine is used as a curing agent to adjust the curing speed of epoxy resin, making the connection between epoxy resin and carbon black closer, being beneficial to reducing the fusing temperature of the toner and its adhesion to the fusing roller.

[0053] From the data comparison of Examples 8-10, it can be seen that when barium sulfate, carbon black and epoxy resin are in specific weight ratios, the three cooperate together, barium sulfate and carbon black are evenly dispersed in epoxy resin, and the surface polymerization of epoxy resin with barium sulfate and carbon black is initiated by the curing agent, which is further beneficial to reducing the fusing temperature of the toner.

[0054] From the data comparison of Examples 10-12, it can be seen that when modified polybutylene terephthalate, PETG and modified carbon black are in specific weight ratios, the modified carbon black is evenly dispersed in the components, improving the dispersibility of the toner, being beneficial to reducing the fusing temperature and heat resistance stability of the toner.

[0055] This specific implementation manner is only an interpretation of the present application, and it does not limit the present application. Those skilled in the art can make modifications without creative contributions to this specific implementation manner according to needs after reading this specification, but as long as it is within the scope of the claims of the present application, it is protected by the patent law.

Claims

1. A toner for ultra-low temperature fixing, characterized in that: The modified polybutylene terephthalate is made of the following raw materials in parts by weight: 60-100 parts of modified polybutylene terephthalate; 40-80 parts of PETG; 2-8 parts of dispersant; 10-30 parts of carbon black; and 1-3 parts of antioxidant. The modified polybutylene terephthalate is made of the following raw materials: polybutylene terephthalate, starch, glycerol, sodium hexametaphosphate, calcium carbonate and calcium stearate.

2. The ultra-low temperature fixing toner according to claim 1, characterized in that: The preparation method of the modified polybutylene terephthalate is as follows: 80-120 parts by weight of starch, 10-30 parts by weight of glycerol, 10-20 parts by weight of polybutylene terephthalate and 5-15 parts by weight of sodium hexametaphosphate are mixed and stirred evenly, dried and crushed, then mixed and stirred with 50-90 parts by weight of calcium carbonate and 5-15 parts by weight of calcium stearate, and the modified polybutylene terephthalate is obtained after banburying and granulation.

3. The ultra-low temperature fixing toner according to claim 2, characterized in that: The weight ratio of the polybutylene terephthalate, starch, sodium hexametaphosphate and calcium stearate is (0.16-0.18):1:(0.11-0.15):(0.06-0.08).

4. The ultra-low temperature fixing toner according to claim 1, characterized in that: The carbon black is modified carbon black. The preparation method of the modified carbon black is as follows: 10-20 parts by weight of barium sulfate and 20-30 parts by weight of carbon black are mixed, firstly 200-300 parts by weight of hydrochloric acid solution are used for ultrasonic dispersion, then 5-15 parts by weight of tetraethyl orthosilicate are added, after washing and drying, 2-8 parts by weight of KH-570 are added and heated and mixed, after drying, 5-15 parts by weight of epoxy resin and 1-3 parts by weight of trimethylethylenediamine are added and mixed and stirred, and the modified carbon black is obtained after curing.

5. The ultra-low temperature fixing toner according to claim 4, characterized in that: The weight ratio of the barium sulfate, carbon black and epoxy resin is (1.2-1.5): (2.6-2.8):

1.

6. The ultra-low temperature fixing toner according to claim 4, characterized in that: The weight ratio of the modified polybutylene terephthalate, PETG and modified carbon black is (1.76-1.92):1:(0.36-0.48).

7. The ultra-low temperature fixing toner according to claim 1, characterized in that: The dispersant includes one of polyethylene wax and zinc stearate.

8. The ultra-low temperature fixing toner according to claim 1, characterized in that: The antioxidant includes one of antioxidant 168 and antioxidant 1010 .

9. A method for preparing a toner for ultra-low temperature fixing, characterized in that: The method for preparing the ultra-low temperature fixing toner according to any one of claims 1 to 8 comprises the following steps: mixing and stirring modified polybutylene terephthalate, PETG, a dispersant, an antioxidant and carbon black, and then melting and kneading and crushing to obtain the toner.

10. The ultra-low temperature fixing toner according to claim 9, characterized in that: The crushed particle size is 80-150 meshes.