Plastic Plastic super bright luminous powder luminous powder long-term

General luminous powder injection molding process more prone to "black", how to sever this phenomenon it? First, choose a good luminous powder, luminous powder to be used for injection molding. Two have strict production process. If controlled by the following precautions, you can greatly reduce the black problem, improve product quality. Luminous more "fear" iron, and iron in contact with the process, the luminous powder will be black, light performance degradation, therefore, the entire production process to reduce the contact time and the contact strength and iron. Minimize powder and plastic pellets mixing time, conditions can modify mixing equipment, will be separated with iron, choose a shorter heating cylinder injection molding machines, control the injection temperature and injection pressure. Specific methods are as follows: A, formula: the choice of a selection of the best plastic powder, and the melt index, the higher the better. Because the melt index of the resin is higher, give full play to the role of the luminescent material. Luminous powder to use two smaller particle emitting powder of 300 mesh or less works best. 3 Lubricant selection polyester hydrocarbons (e.g. PE, PP) resin should be used as the acid amide lubricant, in an amount of 0.2% of the amount of the resin. ABS, PS, PC, AS, PMMA resin such as stearic acid amide lubricant is chosen, the amount of 0.5% to 3% of the amount of resin, typically at 1%. Use 4 to select the powdery dispersant PE wax dispersion luminescent powder can be improved, and improve the appearance of color products. 5 coupling agent used: luminescent pigment added to the resin before, should be treated with a coupling agent, and then mixed with resin and additives, can enhance the mechanical properties of the light-emitting plastic products. Titanate coupling agent, a silane coupling agent added in an amount of about 1.3% of the light emitting pigment, in an amount of about 1.5% of the light-emitting pigment. 6 stabilizers and antioxidants used: polyolefin resins may be added to 0.6% antioxidant, and antioxidants AT168 and AT1010 and other synergies. For ABS resin may also be appropriate to add an antioxidant, add the amount may be less than 0.6%. The B ,. process: 1, aspect ratio should be used in smaller devices, if the device can not change, may be appropriate to raise the temperature of feed zone and conveying the host segments (2-3 degrees can). 2, the host of the speed should be higher than under normal circumstances, high-speed 15-20%, in order to increase the speed of the material. 3, premixed materials, do not let the phosphor at high mixing machine or a high speed mixer by any strong shear and friction. At the same time, try to use a ceramic or plastic containers should blend