Antistatic rollers & sleeves

Rotogravure (also known as gravure) is a form of printing that utilizes an engraved cylinder and an elastomer coated impression roller. The engraved image on the cylinder picks up the ink which is transferred to the web using pressure. Roller and sleeve covering play a crucial role in the rotogravure printing process as they ensure an even and maximum coverage of the ink in order to achieve the highest printing quality. Hannecard has been active and specialized in roller and sleeve coverings for gravure printing for more than 50 years now to ensure a perfect printing quality.

Electrostatic assist is used in rotogravure printing to prevent missing dots and ensure higher-quality images with high ink and color density. To guarantee the best and homogenous printing results ever seen, Hannecard developed the unique solutions HanneResist & HanneVision where carbon nano particles are added to its elastomer coatings. Thanks to this unique combination a more homogeneous electric field is generated, offering more accurate attraction of ink on the printed medium and resulting in a superior printing quality. This new technology also better controls the electric charge submitted to the roller, thus lowering the risks for over-charging and sparks. Our HanneResist & HanneVision covering solutions are suited for the decor & cardboard packaging (especially cigarette packaging) printing industry and complies with all electrostatic assist systems (top loading, direct charge (core charging) and side loading)

To assure non-stick, non-crushing and non-marking for fine media (low density paper, thin film and flexible packaging) and ‘correcting’ characteristics for the contacting web, Hannecard has developed MicroGraf, a micro-cellular foam rubber for the covering of the paster rollers for the splices. MicroGraf is soft and assures the desired constant elasticity. This quality allows for planar corrections and the elimination of air pockets in the spliced web reels. As a variant, we can extend the MicroGraf paster roller covering in a double layered version called MicroGraf+. In this case, the top layer is a compact harder rubber, which can be finished helicoidally or with other special types of grooves, according to the web medium. For rougher media like Kraft paper you can rely on our low-hardness polyurethane series Splice-O-Graf, that comes in hardnesses of 22 or 30 Shore A, and which combines a high elasticity with increased mechanical and dynamical properties.

The disadvantage of traditional textile covered rollers is that they do not assure uniform inking jobs at high printing speeds. Hannecard has developed a solid alternative: DoseRight, a laser-engraved 60 Shore A rubber roll covering. Different laser engraved patterns (squared, pyramidal, honeycomb, scattered, etc.) are available, in function of inking type and application. Laser engraved inking rollers assure a uniform and correct inking of the printing roll, avoid ghost image appearance and reduce the ink spillage. The advantages of DoseRight include: Inking rollers No cell filling No lines No ghost image