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2. Application and dosage of liquid colorants
2.1 Principle
The liquid dispersion is fed directly into the screw feed groove of the injection molding machine or plastic extruder by means of a pump which meters the amount of colorant to be incorporated.
The pump can be peristaltic, diaphragm or piston.
The peristaltic pump (figure 2 ) is chosen by many manufacturers of liquid colorants for its versatility and cost-effectiveness. The principle behind peristaltic pumps was inspired by observation of how the intestines of the human body work; our intestines are equipped with peripheral muscles that enable matter to be moved by a succession of contractions and decontractions. The...
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Application and dosage of liquid colorants
Pigment selection criteria
Standards and norms
- Matières plastiques. Évaluation qualitative de l'exsudation des colorants. (remplace : NF T 51-028 : 1965). Indice de classement : T51-028. - NF EN ISO 183 - 09-99
- Plastiques. Méthodes d'exposition à des sources lumineuses de laboratoire. Partie 2 : sources à arc au xénon. - NF EN ISO 4892-2 - 10-99
- Évaluation de la solidité de couleur par exposition à la lumière. - NF T 51-058 - 01-69
- Plastiques....
Directory
Manufacturers-Suppliers
Liquid colorants
2R Couleur http://www.2rcouleur.com[email protected] – France
BASF Color Solutions France http://www.basf-coatings.fr [email protected]...
Economic data
The 2008 price comparison is as follows:
dry pigments base 1
liquid dyes 1.2 to 1.3
masterbatches 1.3 to 1.5
The market share of liquid colorants for injection-molded polymers is currently estimated at 15% by volume of total colorants used in injection and injection-blow...
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