SPANDEX
CTT-E SPANDEX DYNAMIC YARN TESTER FOR SPANDEX
LH-450S CTT-E SPANDEX
Elastomeric yarn has high stretch and recovery properties, which are affected by tension on the yarn during fabric production and yarn covering.
​
Lawson Hemphill Constant Tension Transport for Elastomeric Yarns, CTT-E is a dynamic quality control test instrument, specifically designed for the elastomeric yarn market in mind.
Conventional static tensile testers can only measure small test lengths at slower test speeds. This does not reflect the process conditions that the elastomeric yarns will be facing. The CTT-E provides a dynamic test platform to measure the yarn properties and performance factors such as Draw Ratio, Elongation %, Unwinding Tension, Hot Air Shrinkage as the yarn is moving at test speeds from 10m/min up to 1000m/min.
This speed range along with the sensitive tension heads provides true information regarding yarn behavior during fabric formation, air or mechanical covering and comfort level of the end product.
The CTT-E can be equipped with optional Elastomeric Yarn Feeder to measure the Unwinding tension under conditions that are very close to zero draft.
-
Input Tension Control
-
Output Tension Measurement & Optical Yarn Break Detector
-
Electronic Drives (10-1000 m/min)
-
Positive Yarn Feeder (EYF LH 455) Optional
SPANDEX
FAK-SE PRECISION LAB KNITTING MACHINE for ELASTOMERIC YARN
LH-125 FAK-SE
The Elastomeric Option for the FAK-Sampler knitting machine allows for the testing of elastomeric yarn in different configurations.
​
The FAK-SE system has two separate controls. One for the elastomeric yarn and one for the base yarn. The ability to control these yarns separately is essential for quality control and evaluation of the yarn.
​
The FAK-Sampler has already been used by leading elastomeric yarn producers, R&D Laboratories, University laboratories, manufacturing development centers and government agencies.
-
Ability to knit bare elastomeric yarn
-
Ability to lay in for recovery evaluation of elastomeric yarn
-
Plating whereas the yarn feed device is adapted to simultaneously feed elastic and non-elastic yarns to the needles of the knitting machine and at predetermined ratios relative to each other
-
Ability to knit elastomeric yarn with other yarns, such as synthetic yarns, cotton, wool and other types
SPANDEX
EYF POSITIVE ELASTOMERIC YARN FEEDER
LH-455 EYF
Lawson Hemphill Elastomeric Yarn Feeder, EYF is developed as positive yarn feeding device for the CTT-E instrument when testing elastomeric yarns for unwinding tension, elongation, draw ratio or pin friction.
​
The EYF is compact in size and it can be placed on the side or top of the CTT-E depending on testing needs. It can accommodate most standard elastomeric yarn packages.
