Foils of high-polymer materials, containing dissolved oblong molecules, show after stretching a strong dichroism in the infrared bands of the dissolved compound. As the longitudinal axes of the dissolved molecules lie preferentially in the direction of stretch, the direction of the vibration moment of...
A deviation device for a film web has at least one deviation element, which operatively interacts with the film web at the point of deviation of the film web and guides the film web on an air cushion. The deviation element can be rotated and has a drive device, which sets the deviation...