Coral wool manufacturers

Pre-dyeing process

1 White fabric unwinding: Unwinding is the head of the whole process. This process seems simple, but it has certain safety hazards. When unwinding, pay attention to the slanting and drawing.

2 seam head: When sewing the seam, pay attention to the connection of each cloth, which is flat seam. This is mainly because it is flexible and convenient to use, the seam is firm, and the amount of thread is small. It is suitable for all kinds of machine trolleys. Sewing between the cars. However, the use of flat stitching layers overlaps, and it is easy to produce cross-bar and other cramps. Therefore, when the head is sewn, the cloth head is not too wide, about 10~15cm.

3 Predetermined type: Predetermined type refers to the direct setting of the white fabric (temperature is 190~230 °C), so that the fabric is in a relatively stable state when it starts dyeing and finishing. The arrangement of the shaping process has the advantage that the fabric is not easy to be viscous in the dyeing process, has a good style, and is not easily deformed and creped during subsequent processing.

The style of the fabric is affected by the relaxed shrinkage of the fabric after the dry heat predetermined pattern. Because the wrinkles are eliminated, the uniformity of the molecular structure arrangement is improved. Tension must be applied to the fabric, and the increase in tension will reduce the enthalpy effect, decrease the degree of activity, and deteriorate a series of properties such as softness, resilience, and fullness. In order to avoid the disappearance of the 绉 effect and affect the fabric style, the general predetermined width is 3~5cm wider than the finished product, the tension of the front guide roller is completely relaxed, and the appropriate overfeed (generally controlled within ±40%) to maintain the warp. The buckling improves the style of the fabric. The predetermined temperature is generally controlled at 165~200 °C. The setting time is determined based on fiber heating time, heat infiltration time, fiber macromolecular adjustment time, and fabric cooling time. As long as the tension of the shaping is required to meet the flatness of the fabric, the appearance can be ensured, so as not to affect the texture of the fabric.