Rubber-coated roller,high Speed Rubber-coated Roller for Producing Biaxially Oriented Film Roller

One 

Jwell Rubber roller surface include EDPM (Ethvlene-Propylene-Diene Monomer), Hypalon, NBRLSR (Liquid silicone rubber), Solid Silicone,Polyurethane, etc. According to the working con:ditions, there is the need to be oil resistant and solvent resistant. The elasticity, flexibilityimpact resistance, wear resistance and other physical properties of the lining can affect thequality of the rubber roller and service life.

Two

High temperature makes rubber aging easily, so except for choosing the high quality rubbeifor roller surface, the design of roller core for cooling is also very important. The spiralrunner design for large flow capacity is adopted making roller surface temperature moreuniform and under control.

Precision grinding equipment ensures coaxial accuracy between the rubber roller surface and its end bearings. Multiple static and dynamic balancing processes guarantee stable operation even at extremely high rotational speeds, such as in bidirectional stretch film production lines.

Three

The 'magic needle' of the biaxial stretching film production line: how can a rubber-coated roller achieve high speed, high temperature resistance, and long lifespan simultaneously?

Biaxially oriented film is a high-performance polymer material produced through precision physical processing. Its core technology involves stretching a molten polymer thick sheet sequentially in the machine direction and transverse direction under precisely controlled temperatures, aligning the molecules in a highly ordered two-dimensional arrangement, and then "locking" this structure through cooling and heat-setting processes. This microstructural reorganization gives the film far superior mechanical strength, optical clarity, barrier properties, and dimensional stability compared to ordinary cast films. However, to achieve these high-performance indicators, every link in the production line must operate without the slightest deviation. Throughout the entire biaxially oriented film production line, the rubber‑covered roll plays the role of a "stabilizing anchor" – it directly affects the film's flatness, thickness uniformity, surface quality, and production efficiency. So, how exactly does the rubber‑covered roll fulfill this mission in the demanding environment of high temperature, high speed, and high precision?

Flexible Nipping: The First Line of Defense for Film Quality
Rubber‑covered rolls effectively improve film edge quality through elastic nipping, preventing edge curling, lifting, or damage, and ensuring stable high‑speed winding. Their smooth traction maintains stable tension in critical zones, avoiding unintended stretching or compression and guaranteeing uniform thickness across the entire film width, while significantly reducing the risk of web breaks at high speeds. From the MDO nip rolls to pull rolls, corona treater rolls, and winding contact rolls, rubber‑covered rolls are found at every key station along the line – they are the fundamental assurance for high‑quality biaxially oriented film.

High‑Temperature Resistance and Efficient Cooling: Solving the Challenge of Rubber Aging
Biaxially oriented film production operates in a high‑temperature environment, requiring the rubber covering to withstand prolonged heat without softening or deformation. A large‑capacity spiral flow channel design for the roll core enables uniform and controllable roll surface temperature, keeping temperature fluctuations within the minimum range. Non‑uniform temperature not only affects the orientation effect during stretching but also accelerates rubber aging and shortens roll service life. The spiral flow cooling system is the key technology that resolves this conflict.

Precision Manufacturing and Dynamic Balancing: Guaranteeing Stability at High Speeds
High rotational speeds impose extremely stringent demands on roll manufacturing accuracy. Professional roll manufacturers can control coaxiality and cylindricity within ≤0.01 mm, surface roughness down to Ra 0.005–0.01 μm, with maximum processing lengths of 14,000 mm and diameters up to Φ1600 mm. Combined with dynamic balance accuracy to G2.5 grade, and through multiple static and dynamic balancing procedures, these rolls are ensured to operate stably and efficiently even at the highest speeds found on biaxially oriented film lines.