Friction Spinning

DREF Friction Spinning Core-to-Sheath Ratio Tool

Core share sets the tensile behaviour, sheath share sets the surface. Both drafts have to be solved together or the yarn misses its count.

Target Yarn Construction
tex
%
Feed Stock Sliver
tex
tex
Running Per position
m/min
%

Sheath Draft

— ×

Draft applied to the sheath feed sliver

Component Split

Core Linear Density
— tex
Sheath Linear Density
— tex
Core Draft
— ×
Production per Position
— kg/h

A filament core enters at its own fixed linear density and is not drafted — read the core draft only when the core is fed as a staple sliver.

DREF Friction Spinning Core-to-Sheath Ratio Tool — free, with the formula and a worked example, at Textile School.