Colortech Black Concentrates

Colortech Black Concentrates

Colortech is color - a spectrum of concentrate products from subtle off-whites and rich earth tones to vibrant reds, brilliant blues and more. But Colortech is also your source for high quality black concentrates. Colortech 20000 Series Blacks have been carefully formulated and manufactured to provide you with the ultimate in product consistency, processability and cost effective performance.

Colortech also offers a custom formulation service that can tailor a specific concentrate package to your precise requirements.

 

 

Selecting the Right Black Concentrate

Today, carbon black is the most common pigment used in the manufacture of black concentrates for polymer processing. The proper carbon black grade can contribute high color and opacity, excellent ultra-violet light protection and even electrical conductivity to finished articles. Selecting the best carbon black concentrate for your specific polyolefin application requires careful consideration of pigment particle size, surface area and physical structure.

Small particle size blacks such as the 17 nanometer N110 type often possess high surface areas and therefore exhibit greater degrees of jetness (or ' blackness') than larger particle size blacks. Small particle size blacks are highly effective UV light absorbers but they are difficult to disperse at high loadings and often result in high viscosity concentrate. Large particle blacks such as N762 tend to exhibit poorer tint strength, but their low cost and excellent dispersability make them ideal candidates for most routine colorant work.

Another key property of carbon blacks is the three dimensional clustering of particle aggregates often refered to as 'structure'. Within a given particle size range, increases in structure result in higher melt viscosities, slightly lower gloss and tint strength and slightly improved dispersability. Electrical conductivity develops when extremely high structure, small particle blacks are incorporated in a polyolefin matrix in such a way that electron transfer can readily occur between neighboring particle aggregates.

This brochure uses standard ASTM designations to describe carbon blacks in terms of their particle size, surface area and structure characteristics. In general terms, the effect of carbon black selection on concentrate and end- product properties are shown below.

ASTM
Designation N762 N660 N550 N326 N330 N110
Particle Size
(nm)
75 50 41 27 25 19
Grayer
Bluer
Weaker
Weaker
Lower
Easier
Lower
Lower
<----
<----
<----
<----
<----
<----
<----
<----
Masstone Appearance
Undertone Appearance
Tinting Strength
Opacity/Hiding Power
Viscosity/Oil Absorption
Dispersability
UV Light Absorption
Relative Cost
---->
---->
---->
---->
---->
---->
---->
---->
Darker
Browner
Stronger
Stronger
Higher
Harder
Higher
Higher


When the performance criterion is cost-effective color, Colortech 20005-19 General Purpose Black and Colortech Filled Black are outstanding performers. Superior processability coupled with a desirable blue undertone make these grades ideally suited for most non-durable blown film, sheet and molding applications.

For extended UV weatherability, N110 blacks are the preferred choice. Colortech 20411-18 UV Black provides a basic level of ultra-violet protection when used at 5-8% addition levels. Colortech 20413-19 and 20435-19 UV Blacks are formulated with a supplementary stabilization package for improved performance at high processing temperatures typically encountered in extrusion coating and heavy gauge pipe extrusion. Finally, Colortech 20306-19 UV Black contains a hindered amine light stabilizer (HALS) and process stabilizer package that makes it suitable for use in thin gauge agricultural films requiring maximum levels of ultra-violet light protection.

Conductive blacks such as Colortech 20011-19 are useful in providing a permanent reduction of electrostatic discharge hazards in sheet, film and injection molded articles for the storage and handling of electronic components. Optimum conductivity is achieved using 20011-19 directly as a molding compound. Applications such as extruded polypropylene sheet for thermoformed microwave food trays require the incorporation of a colorant suitable for direct food contact. High quality packaging applications are best served by products such as 20502-19 High Performance FDA Black. Colortech 20502-51 is an EVA-based version of this product designed for use in polystyrene, HIPS and selected engineering resins. Finally, Colortech 20501-18 Iron Oxide Black provides a viable FDA alternative when the use of carbon black is not permitted or desirable.

 

Carrier Resin Options

While LLDPE is the carrier resin of choice for most polyolefin extrusion operations, alternate carriers include HDPE, LDPE and LDPE/LLDPE resin blends which provide optimum rheological performance in specific applications. In addition, custom EVA copolymer carriers can be specified for use in polystyrene, HIPS, ABS and PVC applications while EMA carriers are best suited for polypropylene, polyamide, polycarbonate, ionomer, acrylic and acetal resin systems. Your Colortech Sales Representative will be happy to help you select a concentrate carrier resin that's right for your processing situation.

 

Regulatory Status

Colortech concentrates designated as HMF are considered to be heavy metal-free under CONEG model toxics legislation (lead, mercury, cadmium and hexavalent chromium totals less than 100 parts per million). Formulations listed as FDA comply with United States Food and Drug Administration guidelines for use in food packaging applications.


Colortech is a North American based manufacturer of color and additive concentrates for the plastics industry. Our products are used in a wide range of products, from everyday household consumer items such as food packaging, toys, diapers, and grocery bags to industrial materials used in telecommunications, such as conduit, wire and cable coatings, fiber-based non- woven products and twine. Colortech concentrates & compounds are used in agriculture applications, such as mulch film, greenhouse & nursery films and pipe as well as in environmental systems such as geomembrane sheet.

While we carry a range of standard white, black, color & additive concentrates for typical applications, our expertise in custom color matching and specialized additive formulation for any plastics challenge awaits your inquiry.

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