Polypropylene masterbatch more and more suppliers, but the quality of management, each supplier has its own way, today, Xiao Bian to share with you, Zhejiang gold color Masterbatches normal quality management to pay attention to what the key issues:

The quality index of polypropylene masterbatch includes more content, such as the appearance of uniform color, no dust, masterbatch granularity: Φ (2.7 ~ 3.3) mm × (3 ~ 3.4) mm, Moisture: ≤ 0.3% ( (Used in BCF, meltblown non-woven models of heat resistance is relatively high), these indicators are our Dalian Science and Technology Co., Ltd. Choi Choi (color card), heat resistance: ≥ 240 ℃ Color concerns.

(1) Filtration performance Fiber grade masterbatch with filter performance to characterize the quality of masterbatch, its value is called DF value is small, the spinning process of the filter component replacement cycle is relatively long, generally require polypropylene masterbatch DF value And less than 2.0 x 105 Pa · cm 2 / g.

(2) Melt Flow Index (MI) The MI of the polypropylene chips is mainly used to characterize the molecular weight of the chips, and to determine the processing and finished product properties of the chips after they are cut into pieces. The masterbatch contains pigment, dispersant and carrier low molecule Polyethylene wax, it can not be used to express the level of MI molecular weight, and will be due to different pigments and varieties change, so masterbatch MI is not the masterbatch control index, only for spinning reference. Select the spinning masterbatch MI than the color slice slightly larger, beneficial to both the size of similar and mixed. General requirements for the MI value (15 ~ 30) g / 30min.

(3) melting point of polypropylene masterbatch dispersant low molecular weight polyethylene wax, so the melting point of 110 ~ 120 ℃; and the general melting point of the pigment is high, more than the temperature of polypropylene spinning, so masterbatch in the thermal analysis of the spectrum There are two endothermic peak.However, the high and low melting point of masterbatch can not characterize the quality of masterbatch masterbatch, and some enterprise standards in the provisions of the melting point of 130 ~ 160 ℃.

(4) heat resistance Masterbatch heat resistance index refers to the polypropylene masterbatch and polypropylene slices according to a certain percentage, respectively, at different temperatures to 5 to 10 minutes cycle spinning to observe the degree of color changes. Color change can be used to assess the color change with a gray-like color card or color card comparison assessment, when its total color difference ⊿ E ≤ 3, the temperature is the masterbatch heat-resistant temperature, generally require heat 270 ~ 300 ℃, color change for the four.

(5) Weatherability coloring Polypropylene weathering, with reference to textile light fastness test method, the results with the assessment of the standard blue color fastness to assess the requirements in the light fastness 5, the fact that more than in the 6 ~ 8.

Quality management done in place, the masterbatch will be outstanding performance, to make the finished polypropylene, stable performance, colorful, Rui Cai has always attached great importance to quality management, is to give customers a better product, if the Our masterbatch products are interested, you can contact us directly oh.