Black mother's black mother's heat resistance
The heat resistance grade of the special masterbatch is generally suitable for the normal temperature of the plastic used in the product, so it can be used with confidence. However, it will cause different degrees of discoloration in the following cases, one is that the temperature is beyond the normal range, and the other is that the downtime is too long. What is the difference between granulation coloring and masterbatch coloring? Masterbatch coloring has the following advantages compared with granulation coloring:
1. The coloring and product processing are completed at one time, which prevents the heating process of the plastic from granulation and coloring, and is good for protecting the quality of plastic products.
2. Make the production process of plastic products the most simplified.
3. Can save a lot of electricity and color the product with masterbatch will not fade? There is no absolutely non-fading product, and the product coloring with masterbatch may still fade, but the level of different grades of products is different, some are more obvious, and some are difficult to detect.
Precautions
1How to use masterbatch? The use of masterbatch is very simple, just mix it with resin particles according to the specified ratio and mix it by hand. Attention should be paid to the following issues in the operation of the equipment
1.1. The mixing chamber of the injection molding machine or extruder generally has multiple temperature zones, among which the temperature near the blanking port should be slightly higher, which is to make the masterbatch melt quickly after entering the mixing chamber and mix evenly with the plastic resin as soon as possible, which is conducive to the masterbatch pigment in a good dispersed state in the product.
1.2. The injection molding machine is properly applied back pressure, which can improve the mixing effect of the screw, which is conducive to the dispersion of pigments, and the side effect of applying back pressure is to slow down the injection molding speed.
1.3. Appropriately increase the temperature of the die head of the extruder, which can increase the brightness of the product.