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Color difference refers to the color difference that exists in the same batch of polypropylene BCF yarn and can be seen with the naked eye during inspection and use. Including the color changes between segments, between cylinders and cylinders, and between layers. The main factors affecting color difference are the following four aspects:
1. The quality of masterbatch. Since polypropylene fiber itself cannot be dyed, it is necessary to add color masterbatch to produce excellent yarn during spinning. But the color difference caused by the quality of masterbatch is not rare. The color masterbatch itself is not uniform, and the existence of continuous cutting and clumping will now cause color difference. The measure taken is to check the condition of the pelletizer frequently, and the masterbatch produced is formed into slices of uniform size.
2. Temperature. The temperature of polypropylene filaments during the spinning process is also a major cause of chromatic aberration. Because polypropylene itself has a low melting point, it is necessary to ensure that the spinning temperature is higher than 60° of the solubility of polypropylene itself in the spinning process to better produce colored yarn. But because the spinning temperature is very sensitive to color. This requires the technicians of Dr. Yarn to control the spinning temperature for different colored yarns.
3. Drafting deformation. People are skeptical that "drawing deformation" will cause chromatic aberration, which is generally considered impossible. However, it is very common from the perspective of customer feedback. The measures taken are to ensure that the oil is applied at each position, the selection of the deformer and the generation of tension, all consistency, which will effectively control the color difference.
4. The influence of stretching temperature. The drawing temperature is very important. The temperature should be controlled above the glass transition temperature of 10°-20°C. Too high temperature will dissolve and cause the thread to break. Too low temperature will also cause the filament end to be unsatisfactory and uneven color. According to research certification, it is better to control the stretching temperature at 130°.
There are many factors that affect polypropylene BCF yarn. The above four factors are the main factors. If you want to completely avoid chromatic aberration, you need to consider many small factors. This requires accumulation of experience in practice and lessons from failure to achieve the final goal.
The polypropylene BCF yarns produced by Nantong Linjia Fiber Products Co., Ltd. are mainly used for: polypropylene BCF yarn for carpet, polypropylene BCF yarn for decorative cloth, polypropylene BCF yarn for curtain fabric, and polypropylene BCF yarn for sanitary ware.