色母料的作用(The role of the color masterbatch) Masterbatch was firstly developed countries of Western Europe in the 1960 s, in the aspects of the research in China starts late, in the late 70 s, such as Beijing, Shanghai and tianjin to begin research and trial production; In the mid-1980s, Beijing yanshan petrochemical and guangdong xinhui began to introduce wet and dry process technology and equipment from Ciba - Geigy, Hoechst and other companies. The technical process of the color masterbatch is strict, and the technology of the color masterbatch is the wet process. The color masterbatch is made by grinding, rotating, washing, drying and granulating with water. Only in this way can the quality of the product be guaranteed. Pigments in grinding processing at the same time, also should undertake a series of technical inspection of the masterbatch, determination of such as sanding slurry fineness, the spread of the abrasive slurry performance, determining the solid content of sand slurry and determination of printing ink fineness, etc. What is a color mother? Why use a color mother? The color mother is another name, which is a kind of polycollation, which is a kind of pigment or dyestuff that is attached to the resin. Several benefits of using a color mother: 1. Helps to maintain the chemical stability of pigment and the stability of color; 2. Make pigment better dispersion in plastic; 3. Protect the health of operators; 4. Simple process and easy to turn color; 5. Clean and non-contaminated articles; Save time and raw materials. Due to the pigments in the process of storage and use of direct contact with air, so will happen the phenomenon such as absorption of moisture, oxidation, cluster, directly use will appear in the plastic products surface color and dark color, the color fade easily changed, and dusty during mixing, affect the health of the operator. And masterbatch in the process of production through the mechanical processing, refined processing of paint, paint and resin carrier, dispersant, fully mixing, make the pigment from the air, water, thereby enhancing the weatherability of pigment, improves the dispersion of pigment and tinting strength, color light. Because of masterbatch and resin particle shape, so more convenient and accurate in measurement, mixed won't stick on the container, so saved clean containers and machine time and cleaning machine used in raw materials. The basic composition of the color mother 1. Pigment or dye The pigments are divided into organic pigments and inorganic pigments. The commonly used organic pigments are phthalocyanine, phthalocyanine blue, phthalocyanine green, suntan, macromolecular red, macromolecular yellow, permanent yellow, permanent purple, azo red, etc. The commonly used inorganic pigments are cadmium red, cadmium yellow, titanium white powder, carbon black, iron oxide red, iron oxide yellow and so on. Comparison of the three pigments project dye Organic pigments Inorganic pigments source Natural and synthetic synthetic Natural or synthetic In clear plastic A white body At low concentrations, the few are translucent Can't be transparent Concentration of coloring big medium small brightness big medium small Light stability poor medium strong Transport phenomena big medium small 2. The carrier The carrier is the matrix of the chromomeres. The special color mother chooses the same resin as the resin as the carrier, the compatibility is the best, but also consider the carrier's fluidity. 3. The dispersant Dispersants cause the pigment to disperse uniformly and no longer condense. The melting point of dispersants should be lower than that of resin, with good compatibility with resin and good affinity for pigment. The most commonly used dispersants are: polyethylene low molecular wax, stearate. Additive in 4. Such as flame retardant, brightening, antibacterial, antistatic, anti-oxidation and so on, unless the customer makes a request, in general the color mother does not contain the additive. Iii. Variety and grade of the color mother The classification methods of the color mother are commonly used in the following categories: Classification by carrier: such as PE, PP, ABS, PVC, EVA, etc. Classification: such as injection color mother, blow molding mother, spinning mother and so on; The varieties can be divided into different grades, such as: 1. Senior injection color mother Used for cosmetic packing box, toys, electric shell and other advanced products. General injection color mother Used for general daily plastic products, industrial containers, etc. 3. Superior blown film mother Used for blowing and coloring of ultra-thin products. 4. Normal blown film mother Used for general packing bags, woven bags of blow and plastic coloring. 5. Spinning mother It is used for dyeing textile fiber, the color of the pigment is fine, the concentration is high, the colouring force is strong, the heat resistance, the light resistance is good. 6. Lower level color mother Used for manufacturing low - grade products such as garbage can and low - level containers. The use and attention of the color masterbatch The use of color mother is very simple, as long as press certain ratio and plastic resin to mix adequately, cooperate with all sorts of different plastic processing craft requirement, extrusion molding can. Need to pay attention to change color, hopper must be clean, with primary colors or add plastic screw cleaner machine residual material in the cylinder is rinsed clean, replace the new screen pack, the best use of more than 100 mesh filter; Note that the temperature is correct in case the color changes. 5. Influence of color mother on product cost In most cases this is the case. But in some cases, using the masterbatch coloring rather than using a toner coloring economy, the reason is colourist can through several lower price pigment combination to achieve higher prices pigment shading effect. Consider the following two phenomena: 1. In many cases, when used in toner color matching plastic products manufacturer with pigment is not the most economic, and because the paint is not familiar with, color matching when the trial and error, a waste of manpower and material is very common. The use of a color mother does not exist. 2. Coloring mother coloring products and use toner coloring products its class is not the same, the price is higher, higher prices are often higher than the use of masterbatch to increase costs, so masterbatch can create "profits" instead. In that sense, In some cases, the use of the color parent coloring is more economical than the use of color powder. 6. Problems and methods of treatment in the color of plastic products 1. Product surface granulation: Main reason: the material cylinder and die head have impurity; The temperature is not correct; The material is heated in the cylinder for too long. The dispersion of the color mother or color powder is not dealt with well; The filter screen has been perforated. Processing method: the temperature of the molding machine to 10-20 ℃ below the normal temperature, start the molding machine, with grey plastic resin to the slowest speed to the clean-up, unwrapped die head cleaning when necessary, and adjust the temperature, the timely replacement of filter. Switch to a decentralized color or color. 2. Uneven diffusion: Main reasons: the mixture is not uniform; The temperature is not proper; The solubility of the color mother and raw materials; The plasticizing effect of the machine itself is poor; The proportion of female is too small. Treatment methods: fully stir, adjust the temperature properly, change the color mother or raw material, replace other machine production, adjust the proportion of color mother. 3. Frequently broken materials Main reason: the temperature is incorrect; Poor affinity of raw materials; The mother dispersion is very bad; The proportion of colored mothers is too high. Treatment: adjust the temperature to be accurate, replace the raw material, replace the good color mother and reduce the proportion of color mother. 4. Color changes: Main reason: the use of raw material background color is not consistent; The machine is not clean and clean; The color mother or colored powder used in the temperature is low and the temperature is too high. The door is not clean and clean; Change of processing technology; The parent or color powder itself has color difference; Improper collocation of the water mouth; The machine is not clean or uncontrollable. Treatment: use the same color as the plate and adjust the proportion of the water. Thoroughly clean the molding machine, feeding door and mixing machine; The use of a suitable color, suitable color or color; Use stable processing techniques. Post rewards and punishment Implementation: warren cable adds 5 points to add 20 gold COINS: 2009-7-19 17:02:45 Reason: professional knowledge detailed echoo Role: intern moderator Grade: technician Prestige: 9 Gender: The guild: Essence: + 0 Integral: 54 Posts: 419 Experience: 1223 Registration time: 2007-4-7 16:08:49 Landing: 2013-7-31 16:23:56 [send short messages] [friend] [search for posts] [view information] [offline] POST 2008-6-4 8:25:18 3 # [edit] [delete] masterbatch By the high proportion of additive and thermoplastic resin, pigments or the good dispersion of plastic colorants, it chooses the resin of colorants have good wetting and dispersing effect, and has good compatibility with being shaded material. Namely: pigment carrier + + additives = use masterbatch masterbatch coloring Thermoplastic plastics coloring methods are: pigment mixing granulation tooth-colored resin and colorant mixture into colored plastic, used for molding process. The powder colorant is mixed with natural resin and used directly to make plastic products. Colouring the most commonly used plastic coloring method. By the high proportion of additive and thermoplastic resin, pigments or the good dispersion of plastic colorants, it chooses the resin of colorants have good wetting and dispersing effect, and has good compatibility with be...