When wind raw white polyester & nylon 66 sewing thread or embroidery thread on dye tube, it is dye package or soft cone, this will be ready to dye. This package diameter, weight and density are critical standardized parameters in dyeing processes to achieve uniform coloration and trouble-free dyeing. The dye packages may vary in softness or hardness but must adhere to established standards. If the package is too soft, the dye liquor tends to preferentially penetrate along the path of least resistance during flow, causing a "channeling effect," which results in uneven dyeing or lighter coloration in specific areas. Excessively hard winding may severely obstruct dye liquor flow, leading to poor dyeing results or even failure to uptake color.
Package weight and dimensions require adjustments based on dyeing machine type, flow rate, automation level, yarn type and structure, dye category, and package holder design. Typical density standards range from 350–500 grams per liter (g/L) based on different twisted yarn types such as polyester, nylon 66, textured, fine Denier or heavy Denier.
During production, it is very necessary to know relation between diameter, weight and density on dye packages, and how to control. One example to calculate ideal dye package diameter based on net weight and density:
When dye package
·D is full package diameter
·dis tube diameter
·h is package average height
·Wis total package weight
·w is tube weight
If the tube diameter is 6.2cm, package average height is 18.8cm, dye package weight is 1165g, tube weight is 65g, required package density 450g/L = 0.45g/cm3, then:
W - w
π [(D/2)2 - (d/2)2]h
= Pacakge density
1165 - 65
3.14 x [(D/2)2 - (6.2/2)2] x 18.8
= 0.45
D = 14.3cm
Dye package diameter 14.3cm will be one ideal and easy-to-judge target when precision winding above raw white twisted yarns to dye tube, for one fine dyeing purpose.
# Dye package soft cone # Precision winding control # Filament sewing thread embroidery thread