Polypropylene macromolecules containing no polar group or a dye molecule reactions can occur with a group and polypropylene fibers relatively high degree of crystallinity, compact, so very difficult dyeing polypropylene, color fastness is quite poor.

To solve the difficult to dye polypropylene fibers usually have the following three ways:
1. copolymerization or graft copolymerization method introduced in the polymer accepts dye molecule polar groups. There is often used a copolymer of acrylic acid, acrylonitrile, vinyl pyridine and the like.

2. After the polypropylene with a small amount of the dye-receiving agents blended extrusion. One approach is the introduction of an organometallic compound Ni or A1, Zn; Another approach is to mix a cationic organic nitrogen compounds, such as polyvinyl pyridine and pyrrolidone derivatives. Since this method does not change the fiber structure, without affecting the physical properties, it is a more practical method.

3. The use of spin that is put before coloring pigment added before the melt spinning into the polymer to go. The method also includes a melt masterbatch coloring and coloring.

Currently, the most commonly used abroad or polypropylene masterbatch coloring coloring process. Its advantages are:

1. eliminating the dyeing process, thus avoiding the dyeing waste pollution of the environment.

2. saving energy (reportedly, per kilogram polypropylene matrix coloring using energy savings 2.15 ~ 3.35 kJ).

3. uniform colors, chromatography is complete, bright color and coloration fastness.

PP masterbatch coloring, masterbatch intrinsic quality is the key, so the quality masterbatch have the following requirements:

1. polypropylene melt should have good dispersion.
2. The pigment particle size should be small, uniform particle size of the effect to be too large
3. masterbatch added effect of fiber does not allow the process of forming and a series of post-processing.
The masterbatch of pigment should have good heat resistance, light resistance, high color fastness and bright colors.
5. In the fiber manufacturing process must have a stable physical and chemical properties, it does not react with the spinning aid.
6. Masterbatch is a combination of quality inherent quality raw materials used, the results of different masterbatch production methods, specific production environment, production equipment, operating level, management ability and many other factors.

Hangzhou Yujie Chemical Co., Ltd. Main polypropylene, nonwovens masterbatch, liquid masterbatch and a variety of functional masterbatch. For the above masterbatch product details, please call us!