1658 G.A.R Highway, Suite 5
Swansea, MA 02777, USA
Tel:+1 (508) 679-5364
Fax: +1 (508) 679-5396
The textile industry uses knit-dye-grade or draw force measurement when checking the uniformity of the POY production. Before inspecting the POY for dye uptake, it is necessary first to draw and set the yarn. HDK is the only available lab instrument that offers this capability.
Hot Draw Knitter with Draw Force Tester, HDK-DFT, is a precision knitting machine with automatic stitch control system and a Draw Force measurement to check the consistency of the POY production quickly and accurately. It is ideal for use in production control and R&D labs as well as dyeing plants.
The HDK-DFT is the only instrument that provides a knit sample and draw force results on a package at the same time. This test complies with ASTM D 5344, Standard Method for Extension Force of Partially Oriented Yarn.
POY, MOY and LOY samples from 10d up to 2000d can be knit with the HDK. (Please consult Lawson Hemphill to knit higher or lower denier yarns). The machine can be equipped with a non-contact Vapor heater and contact Pin heater to allow testing of both polyester and nylon yarns. Precision Draw ratios are available from 1:1 to 1:3, with increments of 0.05.
Windows based and user friendly DFT software program provides real-time tension data on the yarn as it is being drawn and knitted. Accept/Reject limits can be defined by the operator. The test results and the tension graphs are saved in common file formats. DFT software includes the ability to run draw force tests under increasing temperature levels to determine optimum settings and critical temperatures for the yarn under test.
Precision knitting machine with automatic Stitch Control and Draw Force Measurement system
Provides a standard knit fabric sample and draw force results on the same POY package at the same time to check the uniformity and the consistency of the POY production quickly and accurately
Complies with ASTM D 5344, Standard method for Extension Force of Partially Oriented Yarn
Ability knit POY, MOY and LOY yarn samples
Non-contact Vapor Heater (max 205°C) and contact Pin heater (max 250°C) are available to test polyester and nylon yarns on the same machine
Precision Draw Ratio rolls from 1:1 to 1:3, with increments of 0.05 are available
Nine different cylinder sizes to knit yarns from 10d up to 2000d. (Please consult Lawson Hemphill to knit higher or lower denier yarns.)
Interchangeable knitting cylinders that can be used in all Lawson Hemphill knitting machines
Maintains constant course length with the Yarn Meterhead to ensure uniform loop size
Maintains constant tension on the yarn with the Air Servo/Stitch Cam Regulator
Features fabric take-up assembly to collect the fabric sample under controlled tension