PTG/e’s unique multipurpose drawing line is capable of stretching tapes and fibers from polyolefins to high-temperature polymers such as polyamides or ketone polymers. By drawing these materials in one direction, improved mechanical properties (stiffness and strength) can be obtained.
As an example, the higher stiffness of artificial grass is the reason why it stands upright. And higher tensile strength is the reason debris/construction bags and woven shoppers are so strong. In addition to these everyday applications, the composite industry is very interested in the combination of low-density (light-weight) materials and their improved mechanical properties upon drawing. You can find composites based on drawn thermoplastic materials in all kinds of extreme applications, such as aerospace engineering, ballistic protection, oil & gas transport and sports.
The stiffness (tensile modulus) of thermoplastic polymers, like polyolefins, polyamides or ketone polymers, can be controlled by orientating polymer chains. This orientation can be achieved during stretching of the material between the glass transition and the melting temperature of the polymer, which is also called solid-state drawing. See the image below.
How does a drawing line works?
The drawing line consists of a draw unit with 5 godet rolls, a draw unit with 3 godet rolls separated by 2 heating zones in an oven, another draw unit with 3 godet rolls, and finally a winder. The drawing speed can be adjusted per unit, or even per roll on the oven unit. The temperature of each induction-heated roll and oven plate can be controlled separately, up to 280 °C. Afterwards, the materials are collected on a metal or cardboard tube for further analysis either at PTG/e or at the customer.
Advantages PTG/e drawing line
Since we are able to draw small lengths of tapes and fibers (starting from 20 meters) on our drawing line, less material is needed for your tests. Also, your own production line can keep running, since you are performing your tests in the PTG/e laboratory.
If you like to learn more about our capabilities, please contact us.