Developments in Colorants for Plastics

  • ID: 224982
  • May 2003
  • 120 pages
  • Smithers Information Ltd
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At a time when it is critical to many plastics processors to add value to products, colorants are an essential part of the additives repertoire. Colour has become increasingly important over the years as product appearance and appeal to consumers have become major elements in the packaging and marketing of wide ranges of goods, from cosmetics to cars.

There are two types of colorants in use: dyes and pigments. Pigments are insoluble and must be adequately dispersed in the plastic to achieve a uniform colour. This can be a problem in very thin mouldings where particle agglomerates are highly visible. Dyes are soluble in plastics and give a more transparent finish.

Health, safety and environmental issues have brought about changes in the market place as manufacturers strive to meet national and international regulations. Factors to consider in colourant selection include the presence of heavy metal compounds, migration of colorants into food or packaged goods (contamination issues), toxicity in fire, etc.

There are many functional considerations when selecting colorants. For example, many plastics are processed at very high temperatures and shear, and products READ MORE >

Note: Product cover images may vary from those shown
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1. Introduction

1.1 Definitions

1.2 Pigments versus Dyes

1.3 Organic versus Inorganic

1.4 Environmental and Occupational Health and Safety (OHS) Issues

1.5 Decision Factors in Selecting Colorants

1.6 Hotter, Faster, Thinner

1.7 Delivery Systems

1.8 Easy Dispersing Pigments

1.9 Non-Dusting, Free Flowing

2. The Colourants

2.1 Yellow Colour

2.1.1 Low Performance Applications

2.1.2 Medium Performance Applications

2.1.3 High Performance Applications

2.2 Orange Colour

2.2.1 Low Performance Applications

2.2.2 Medium Performance Applications

2.2.3 High Performance Applications

2.3 Brown Colour

2.4 Red Colour

2.4.1 Low Performance Applications

2.4.2 Medium Performance Applications

2.4.3 High Performance Applications

2.5 Maroon and Violet Colour

2.5.1 Low Performance Applications

2.5.2 Medium Performance Applications

2.5.3 High Performance Applications

2.6 Blue Colour

2.7 Green Colour

3. Special Effects

3.1 Metallic

3.2 Pearlescent

3.3 Holographic

3.4 Fluorescent

3.5 Phosphorescent

3.6 Thermochromic and Photochromic

4. Summary and Conclusions

Note: Product cover images may vary from those shown
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Note: Product cover images may vary from those shown





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