04.05.2015 - 07.05.2015 — Hall: 3.0 Stand: H 43
Testrite now produces three types of yarn shrinkage testers all based on its original idea, devised over 35 years ago, of replacing the oil and water bath methods of testing with hot air.
Testrite's testers provide a result in one to two minutes using closely controlled hot air ovens. The sample is passed through a small air gap at a set temperature which causes it to shrink and a result is recorded.
The company's proven track record with major tyre manufacturers worldwide, as well as top yarn producers, is second to none.
The Patent Thermal Shrinkage Oven MK3 Tester is a manual tester and the MK5 Shrinkage and Force Tester is a digital tester.
The Smart Force Shrinkage Tester is computerised with a PC and dedicated software, allowing two simultanious yarns to be tested at once, either for free shrinkage or shrinkage and force. the unit is completely computer controlled and test data can be archived and used in any desired way.
Testrite's patent thermal shrinkage oven was designed in conjunction with Dunlop to determine the shrinkage at closely controlled temperatures. The original model the AB1, has now evolved to the MK3 version but still remains a basic type unit with visual analogue results without the force-load facility. The unit is still available and a very popular economy model.
It has also since been modified to enable similar tests to be carried out on one-inch strips of fabric, as well as yarns and monofilaments etc.
Samples under test are exposed to the controlled air between two 10 inch wide heated platens and shrinkage percentage is indicated on a non-linear calibrated scale, either diginal (MK5 or analogue (MK3)
Residual shrinkage can also be ascertained by removing the sample from heated zone and allowing it to cool. The instrument has ASTM international designation number D4974.
Testrite has agencies in all major European, US and Asian Countries including India, Hong Kong, Japan, China, Vietnam etc.