Spinning Lab Test ; Uster Tester- 4 Lecture # 1, Yarn Testing , yarn Imperfection. yarn ipi.Textile Pak.

Spinning Lab Testing:

UT.4 = Uster Tester 4

⦁ Spinning Mills Laboratory Yarn Testing instrument.

⦁ Yarn Imperfection Testing.

⦁ Textile Pak.

Uster Tester 4 operating:

Yarn Imperfection:

Uster tester 4 yarn results. Yarn ipi.

U% = Mean linear irregularity of slivers, rovings and yarns.

Unit = %

CVm = Coefficient of variation of the yarn mass..

Unit = %

CVmb = Coefficient of variation of the yarn mass, between.

Unit = %

CVm (L) = Coefficient of variation of the yarn mass at cut lengths of 1 m, 3 m, 10 m.

Unit = %

Thin places = Number of thin places at selected sensitivity set- tings (staple fiber yarns only).

-30%, -40%, -50%, -60%

Unit = /km 

Thick places = Number of thick places at selected sensitivity set- tings (staple fiber yarns only).

Thick places: +35%, +50%, +70%, +100%

Unit = /km 

Neps = Number of neps at selected sensitivity settings (staple fiber yarns only).

Neps: +140%, +200%, +280%, +400%

Unit = /km 

H = The hairiness H corresponds to the total length of protruding fibers divided by the length of the sensor of 1 cm. The hairiness is, therefore, a figure without a unit.

Unit = without a unit. 

Rel. count = Count deviation related to the length of yarn test- ed, the mean corresponds to 100 m, but with the possibility of selecting another material length than 100 m. The length settings are 50, 200, 450 m or manual input.

Unit = %

Index = Ratio between the actual and ideal evenness of staple fiber strands

Unit = without a unit. 

DR 1.5m = Deviation Rate describes by what rate in (%) a defined mass deviation in (%) has been exceed- ed. The cut length factor (in m) averages out the short peak deviations. 

Unit =  %