Color masterbatches

The extrudate samples and the solidification experiment clearly show the importance of the melting process on the mixing quality of the extruder discharge. The cases shown here are for color masterbatches in natural or white resins, but the concept applies to any solid mixture or blend added to the hopper of an extruder. Color masterbatches were used here because it is much easier to visualize than other compositional variations or thermal gradients. 

The root cause of dark color streaks in gray-colored parts can sometimes be more difficult to determine since both poorly dispersed pigments and resin degradation products can be the source. In these cases, removing the color masterbatch from the process and operating with just the natural resin will allow the root cause to be identified. That Is, If the dark color streaks still occur in the product after the color masterbatch is removed, then the source of the problem is related to resin degradation. Two case studies are shown in Section 11.12 to illustrate these defects. 

As discussed in Section 11.12.2, several root causes exist for black streak contamination in molded parts. These root causes include degradation of the resin in the screw channels and nonreturn valve or runner system, degraded material entering with the resin feedstock, and poorly dispersed pigments in the color masterbatch. To determine if the color concentrate masterbatch was the source of the black streaks, the color concentrate was removed from the feedstock and only natural... 

A Maddock solidification experiment was performed using ABS resin at a screw speed of 60 rpm [30]. Like the solidification experiment for the ET screw of Section 14.2.2, the feedstock resin contained 2% Ti02 compounded into the pellets, and a black-colored masterbatch was added at a letdown ratio of about 220 1. The cross-sectional views of the resin solidified in the channels are shown by Eig. 14.15. The white pellets and unmixed resin are visible in the views as white regions. The regions that are well mixed are an evenly colored dark or black color. 

The main applications of metallic effect pigments are paints and coatings, printing inks and graphic arts as well as plastics and colorants (masterbatches). 

Akrochex. [Akrochem] Pdymeric rubber color masterbatches. 

Sadolin. [Perrite Plastic Compds.] Colored masterbatches. 

Unicorn Universal Master Batches. [Begg Co. Thermoplastics Ltd.] Color masterbatches for plastics. 

Unimax. [Gabtiel-Chetrde GmbH] Colored masterbatches. 

The blow-molding of containers may require the use of color masterbatches for good dispersion. 

HDPE blow molded containers turn glossy with a new color masterbatch, news article (www.plastemart.com). Smartech Global Solutions Ltd. (downloaded 4 June 2007). 

Chem. Descrip. Calcium carbonate coated by org. media CAS 471-34-1 EINECS/ELINCS 207-439-9 Uses Filler in plastics (rigid PVC. window profiles, calendered sheets, profiles, pipes, moldings, polyolefins, colored masterbatches). paints (high-gloss enamels), elastomers Features Completely compat. with org. media easily dispersed Properties Very wh. rhombohedral crystals 60% < 2 p sp.gr. 2.7 bulk dens. 0.90 g/cm (packed) oil absorp. 17/100 g powd. dry brightness 96.5% ref. index 1.59 pH 9 hardness (Mohs) 3 Zetafil CST 3 [Microfill K. Zafranas]... 

ColorMatrix Europe supply additive and colorant masterbatch for use in the manufacture of polymeric materials and articles intended for various applications such as food contact packaging, and toys. ColorMatrix Europe products may be manufactured at different manufacturing locations (USA, Europe, and Asia). The Global regulatory department based within Europe keeps an inventory of raw materials used across all global locations and manages supplier information, chemistry information and so on. ColorMatrix Europe s global inventory contains hundreds of raw materials however the majority of these are classified as non hazardous. 

CORIs are used for the reactive processing, compounding of alloys and blends, color masterbatches, and fiber-reinforced composition. The quality of the... 

Can be readily colored by a range of techniques, for example, dry coloring, masterbatches and liquid coloring. Dry colors are widely used with HIPS and it is customary to add a... 

Keywords anthraquinone pigment, bath-dyeing, color masterbatch, color properties, concentrate, dispersant, dry-cleaning fastness, dry rubbing, dyeability fastness, dyeing, exhaust process, mass-coloration, phthalocyanine pigment, pigmentation. 

Preprocess drying temperature/ time/residual moisture C/h/% 60/8 (color masterbatches) ... 

Colored masterbatches, white masterbatches, electrically conductive masterbatches... 

Additives, color concentrates, colorants, masterbatches pigments, printing inks... 

Lanco Antifloat F-113 wetting agent, surfaces color masterbatches... 

As the natural color of the material is an off-white then a wide color range is possible this does not include transparent colors. Sold in both compounded colors and as nattu material for coloring on the injection molding machine by techniques such as dry coloring, masterbatching and liquid coloring. 

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