Masterbatch Note:
How to use masterbatch? Masterbatch's very simple to use, simply press the required ratio of resin particles mixed by hand mixing can. The operation of the equipment should be aware of the following issues:
1.1. Injection molding machine or extruder mixing chamber generally have a plurality of temperature zones, wherein the mouth near the blanking period of the temperature should be somewhat higher, this is rapidly melting in order to make the masterbatch into the mixing chamber, with the plastic resin as soon as possible mixed, it is a good masterbatch pigment products in good dispersion state.
1.2 injection molding machine properly applied back pressure, which can improve the mixing effect of the screw, the favorable pigment dispersion is applied back pressure side effects of the injection speed has slowed.
1.3 the temperature of the extruder die appropriate increase, can increase the brightness of the article.
2, how to determine the proportion of masterbatch use? Determined the masterbatch using proportional basis, is to obtain a satisfactory coloration effect. As long as the product surface even tone, stripes and spots can be recognized. The proportion of seven-color deer masterbatch may be the selection below: 1:100 unless very good mixing, or prone to the phenomenon of uneven pigment dispersion, seven-color deer companies generally do not recommend customers use this proportion. However, some customers because of price pressures, in particular, hope to use the proportion of masterbatch, seven-color deer for the sake of customers, and also more likely to produce such a low proportion of concentrated masterbatch and pigment dispersion generally meet the requirements. 1:50 for coloring the requirements of general plastic products, PE, PP masterbatch more this ratio 1:33 - 1:25 for coloring the higher the PO class products, coloring requiring a lower level or general ABS 1:20 products for advanced plastic products including PO, ABS, can be widely used in injection molding, blow molding, spinning process 1:20 or more generally for advanced cosmetic containers coloring, and more for small injection molding machine
3, how to calculate the cost of use of the masterbatch? Masterbatch coloring the costs should be calculated net of the weight of the masterbatch. Examples are as follows: 100 kilograms of plastic resin 2 kg masterbatch, this time the total weight of 102 kg, assumptions resin price of 10 yuan / kg the masterbatch price of 20 yuan / kg, the 102 kilograms of plastic products for use of color mother and increase the cost of 20 $ / 102 kg × 100 kg: 2 kg (20 yuan / kg -10 yuan / kg) = 20 translated into increased costs per 100 kg of plastic products due to the use of masterbatch: = 19.61 yuan
Use of masterbatch would increase the cost of the product? In most cases like this. However, in some cases, the use of masterbatch coloring rather than the use of the toner colorant economic reasons Colorist by several lower price pigment combination to achieve the coloring effect of the pigment of the higher price. Also consider the following two phenomena:
4.1 in many cases, plastic products manufacturers with toner color pigment chosen is not the most economical, the trial sufficiently familiar to the pigment, the color, resulting in a waste of manpower and materials is very common. Using Masterbatch this problem does not exist.
4.2 masterbatch coloring product and its quality toner coloring products are completely different, its price should be higher than some of the prices are often higher than the cost of masterbatch increase, so the color Mother contrary, it could create a "profit". From this perspective, in some cases, be far more than the use of toner coloring masterbatch coloring Economic.
5, masterbatch need to be dried before use it? The masterbatch under normal circumstances do not require drying, can be used directly, However except, ABS, and NY masterbatch, they should be the conventional process for drying. The masterbatch shelf life how long? The masterbatch can be long-term preservation. A pigment dispersed in the masterbatch is fixed to the carrier resin, in a closed state does not change, even if the long-term storage of its quality. Should be stored in a dry, cool environment
6 Can you use several different masterbatch formulated color? Companies often several masterbatch for a small amount of customers the preparation of a specific color without the guidance of the company's technical staff, the customers can not be given a free hand in several masterbatch used in conjunction with, but can not mix the different companies in the production of masterbatch to avoid incompatible losses. Use the masterbatch will affect other properties of the product it? Some pigments on the effect of the flame retardant products. Used in flame retardant products should be pointed out to the masterbatch manufacturers. Mold is whether the impact of the use of masterbatch? In order to fully display the masterbatch coloring effects, the mold must have the appropriate quality, in particular, the surface must be very smooth.
Masterbatch common defects
1, sunlight, products, stripe-like pigment with this problem needs to be considered from two aspects of plastic physical and mechanical properties and plastic molding process:
1.1 not control the temperature of the injection molding equipment, the masterbatch mixing chamber can not be fully mixed with the resin.
1.2 injection molding machine did not add some back pressure, screw the poor mixing effect.
1.3 masterbatch dispersion is not good or resin plasticizing bad.
Process as follows debugging:
Rely on a mixing chamber temperature is a little off the spout part 2. Certain back pressure is applied to the injection molding machine. As more debugging still not brought the matter to the masterbatch resin dispersion or matching problem, the masterbatch manufacturers should contact to resolve.
2, using some masterbatch products seem easier rupture of this may be due to the the manufacturer chosen dispersing agent or auxiliaries poor quality diffusion caused miscible adverse affect physical and mechanical properties of the article.
3, according to the the masterbatch instructions on the proportion of use, the color is too deep (too shallow) Although this problem is simple, but there are many possibilities, in particular:
3.1 masterbatch without serious test color, the pigment is too little or too much
3.2. Use metering inaccurate, domestic enterprises, especially SMEs random measurement phenomenon abound
3.3 masterbatch and resin matching problems, this may be inappropriate choice of masterbatch carrier manufacturers may randomly change resin varieties
3.4 improper temperature of the machine, masterbatch long residence time in the machine processing procedures: First, check whether the resin varieties masterbatch match, the measurement accuracy, followed by adjustment of the temperature or the speed of the machine, there are still problems should masterbatch manufacturer Contact.
4, the same masterbatch resin and recipes, different injection molding machine products why color shades? This is often the cause of the injection molding machine. Different injection molding machine different from the manufacture, use or maintenance condition, caused by the difference of the mechanical condition, especially the difference of heating close to the original barrel so masterbatch in the dispersed state in the barrel is not the same, the The phenomenon occurs.
5, for another brand of resin, the same masterbatch formulations, color change, why is this? Different grades of resin density and melt index are different, so the properties of the resin are different, with the compatibility of the masterbatch will be a difference, thus the color change occurs, in general, does not vary as long as its density and melt index , then the color difference will not be much more positive color, you can adjust the amount of the masterbatch to.
6, masterbatch occur during storage the the pigment migration phenomenon will affect the quality of the products? Some masterbatch of pigment (or dye) is very high, is normal in this case, the migration phenomenon occurs. Masterbatch is added dye, severe migration phenomenon. But this does not affect the quality of the products, because the pigment in progress at a normal concentration of chromogenic masterbatch injection into products.
7, why have some bad injection products gloss? There are a variety of possibilities:
7.1 The low temperature of the nozzle of the injection molding machine
Bad finish of the mold of the injection molding machine 7.2.
7.3 the molding cycle is too long
7.4 titanium dioxide masterbatch contained too much
7.5 masterbatch dispersion is not good
8, after a period of time, some plastic products occur discolouration. The manufacturers using basic pigments poor quality, drift occurs.
9, why ABS masterbatch is particularly prone to color differences? Countries in the production of different grades of ABS Component, even if the same grades of ABS, each batch batch number may also exist chromatic aberration, after using masterbatch coloring of course also appear chromatic aberration. This is due to the characteristics of the ABS, international is not a complete solution. However, this chromatic aberration is generally not serious. ABS masterbatch, the user must pay attention to this feature of the ABS |
