| What is dispersant | |
| Release time：2016/9/24 | |
Polymer dispersion process of pigments, in view of the content is less or non-polar polymer carrier is mixed with paint on the surface of the polarity, break through the interface obstacles, play a key role in the increase compatibility. For organic and inorganic pigments, the primary particles easy to reunite. Paint surface polarity is difficult and less content of non-polar polymer (polyolefin) compatible. Dispersant is mainly in the masterbatch formulation of pigment wetting, a pigment very good dispersion effect in plastic products, and stability in the resin. Adopt what kind of paint is a prerequisite for good compatibility with resin, does not affect the color quality of products. Polyolefin masterbatch dispersant generally with low molecular weight polyethylene wax or zinc stearate, etc. Polarity is commonly used engineering plastic masterbatch dispersant low molecular weight polyethylene wax, magnesium stearate, calcium stearate. According to the requirements of the various plastic products and its use, the proportion of the amount is very strict, if the control is bad will affect production in the process of production. On subsequent need heat sealing products quality effects. Inspection masterbatch dispersant used is reasonable, color intensity is a validation method, the same dosage of pigment of masterbatch, the selection and dosage of dispersants, intensity of color will have difference. Dispersant type: Polyethylene wax, chemical name, low molecular weight polyethylene is a good convergent wax with high density, molecular weight distribution. Polypropylene wax, chemical name of low molecular weight of polypropylene. Modification of polyethylene wax, modified polyethylene wax is mainly made by polyethylene oxide. It makes ordinary polyethylene wax with acid value, its mechanical properties and physical properties of the melt and oxidized wax is the same, but improved affinity with inorganic matter. Paraffin wax, white solid, density of 0.87 a 0.92 g/cm3, 57 a melting point 63 ℃, wax is added in the masterbatch production can improve the system of liquidity, can also enhance the appearance of extrudate obtain smooth level off. Usually choose when using paraffin wax melting point is 60 ℃. |
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