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SHRINKAGE

FST SIMULTANEOUS SHRINKAGE% and SHRINKAGE FORCE TESTER

LH-610 FST

FST, Force Shrinkage Tester measures the Shrinkage % and Shrinkage Force on the yarn simultaneously. The system is a closed unit, which maintains a controlled atmosphere as the test is progressing.

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The system uses a high temperature heater to measure in Shrinkage % and Shrinkage Force. The heaters can be individually programmed up to 300˚C to run tests independent of each other. (Optional High Temp Heaters up to 450˚C)

The FST is equipped with 2 clamps. Different clamp designs are available to accommodate yarn types from tire cords to elastomeric yarns.

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The standard load cell is 200g. Also available are load cells from 10g to 2000 g, depending on the yarn type to be tested.

FST Software automates all calculations for Shrinkage Force and Shrinkage % based on temperature and time parameters. In addition, built in temperature ramp feature allows the user to test the yarn against increasing temperature levels. This feature allows the operator to predict optimum temperature settings for run ability of individual yarns packages.

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The test process is automated. A yarn sample is clamped and the test button is activated. Automatically the yarn is inserted into the closed heater chamber for testing. The software plots the shrinkage % or shrinkage force data in real time. Statistical analysis is made at the end of each test.

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  • Automated testing system for simultaneous measurement of Shrinkage % and Shrinkage Force of the yarn

  • Complies with ASTM D4974, ASTM D5591, EN 13844

  • Enclosed system that maintains a draft-free environment during test

  • Dual, non-contact heaters individually programmable to run tests under constant or temperature ramp mode with 5 settings from ambient to 300˚C (Optional High Temp Heaters up to 450˚C)

  • 10g, 200g or 2000g load cell available to meet the required force measurement precision

  • Light duty or heavy duty clamp designs available to provide non-slip grip for different yarn types from elastomeric yarns to tire cords

  • Friction free pulley to measure the Shrinkage % with ± 0.1% precision

  • Five programmable temperature settings allow temperature ramp and soak interval

  • Windows based, easy-to-use software features

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SHRINKAGE

TYT-E TWO ZONE TESTER for SIMULTANEOUS MEASUREMENT of CRIMP AND SHRINKAGE% OF TEXTURED YARN

LH-131 TYT-E

Texturing is an important step that adds natural fiber feel to synthetic yarns by introducing bulk and crimp. Traditionally, these properties were measured using the Skein Method, which by design can only measure skeins of yarn at a time.

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The introduction of the yarns with different crimp levels into the same fabric will cause light to reflect differently, creating a stripy appearance due to variations in bulk. When measuring the Crimp and Shrinkage, TYT can apply as low as 1mg/denier tension on the yarn to measure the slightest change in crimp and shrinkage.

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Lawson Hemphill developed the Textured Yarn Tester, TYT to overcome the disadvantages of the Skein method by reducing test time (1000+ pkgs /8hrs with a package changer) and required no special expertise to run the test. The machine conforms to ASTM D 6774, Standard test method for Crimp and Shrinkage properties for Textured Yarns using a Dynamic Textured Yarn Tester and Chinese Standard GB/T6508-2001.

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TYT provides a dynamic platform that allows measuring every section of the yarn to simultaneously determine five yarn properties, including Total Recovery (total contraction), Fiber Shrinkage, fiber Crimp, Entanglement and Friction Coefficient.

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In addition to providing direct feedback on yarn quality during production, TYT can be placed directly in the yarn packaging area to qualify outgoing packages before final shipment.

User friendly, TYT software program features complete statistical report with accept/reject limits and built-in ability to connect to a network to control the production parameters remotely.

  • Precision textured yarn tester for simultaneous analysis of Total Recovery (total contraction), Fiber Shrinkage, fiber Crimp, Entanglement and Friction Coefficient.

  • Conforms to ASTM D 6774, Standard test method for Crimp and Shrinkage properties for Textured Yarns using a Dynamic Textured Yarn Tester

  • Complies to Chinese Standard GB/T6508-2001

  • Can be equipped with a package changer to become a fully automated textured yarn tester with 1000+ packages/8 hour test capability

  • Dynamic test platform to measure every section of the yarn, allowing the capability to detect short term yarn variations

  • Ability to test apparel and carpet yarns, including nylon, polyester and polypropylene

  • Ability to test set (low bulk) and stretch (high bulk) yarns up to 75% Total Recovery.

  • Maintains tension on the yarn as low as 1mg/denier to measure the slightest change in fiber crimp and shrinkage

  • Variable test speed from 20m/min to 200m/min

  • Two types of non-contact heaters available: Standard Heater (100 to 205°C) or High temperature heater (180 to 250°C)

  • User friendly software program features complete statistical report with accept/reject limits

  • Built-in export function to connect to the factory network to control production parameters remotely.

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