PP masterbatch pigment selected from the bad consequences, you know?

PP masterbatch dominant color, you know who that is? Pigments, oh wow! What is hot you smart! But how to choose paint, you very headache now! Do not worry, Xiao Bian come to you it!

PP masterbatch pigment choice!

Polypropylene colored pigment is mainly divided into organic pigments and inorganic pigments. Organic pigments are characterized more soluble in common solvents, transparency, tinting strength, the proportion of small, with less color bright, but poor heat resistance, prone to sublimation and pyrolysis and, therefore, use is restricted. Inorganic pigments are dyed before spinning polypropylene primary colorant, because good light and heat stability, weatherability and migration resistance is good and has been widely used. The downside is that some of the paint is faded, not bright, and easy to plug in the spinning process spinning nozzle assembly, these negative factors can be addressed through the continuous improvement of the quality of the dye.

Untreated aggregate or aggregates are not directly using a commercially available pigment mostly, otherwise it will inevitably appear for coloring polypropylene broken silk, wool silk, Color "blur" and serious issues such as blocking network. So the polypropylene colorant has the following requirements:

Colorant for three requirements:

1. the characteristics of coloring polypropylene requirements

Poly pigment should have good compatibility rain terpene resins, additives and added good synergy; tinting strength, good dispersion; heat, weather and chemical resistance and good, and in the spinning process in the Pack firmly, no significant adverse effect on product performance

Thermal stability requirements 2. colorant

Polypropylene spinning is generally carried out at 270 ~ 300 ℃, the poor heat resistance of pigment discoloration decompose, so the optimum temperature resistance should colorant is sustained 30min at 300 ℃ does not change color, can be relaxed to use cooling Masterbatch After 10min at 240 ℃ sustained colorant is not decomposed can be used.

3. The pigment is dispersed uniformly in favor of fine

Polypropylene masterbatch organic pigment with a particle size 1 ~ 0.02um appropriate, inorganic pigments require 99% can not be too in lum, the proportion of generally 0.3 ~ 0.6um higher, the better the dispersibility. But also vary depending on the pigment, such as titanium dioxide 1 ~ 0.2um, black O.1 ~ 0.01um appropriate. If some paint too small, such as less than 0.2um particles is large proportion will be, first, re-flocculation of particles is too difficult to maintain particle state; second, due to the diffraction of visible light to bypass wear pigment particles shot in the past, increased permeability of the coloring matter is difficult to stabilize the color, for example: red may become yellowish, becoming greenish blue and so on.

Pigment selection is good or bad will not only affect the coloring effect, but also affect the quality of polypropylene fiber, as well as productivity. Consequences is so serious, paint must carefully choose Oh!

Chi Chun Textile Co., Ltd. Tengzhou City portrait share!