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Q.Rubber and Silicone
Processing Materials - Natural Rubber, PU, CR, EPDM, Silicone, etc.
Rubber
NR
Natural rubber has excellent processability and physical properties but lacks oil resistance, heat resistance, and ozone resistance. It is commonly used in tires, shoes, rubber hoses, and rubber belts. Rubber rollers made of natural rubber are suitable for applications where heat and oil resistance are not required and where cost is a concern.
NBR
Nitrile Butadiene Rubber is an oil-resistant synthetic rubber. It is widely used in printing rolls. NBR has excellent heat resistance and wear resistance. Its oil resistance depends on the acrylonitrile content.
CR
With 100% purity, CR (Chloroprene Rubber) has excellent mechanical strength, wear resistance, high pressure resistance, and elasticity. It also has moderate oil resistance, chemical resistance, heat resistance (up to 120℃), high wear resistance, high elasticity, and ozone resistance. It is widely used in general industrial rubber rollers.
EPDM
EPDM (Ethylene Propylene Diene Monomer) exhibits excellent resistance to polar solvents such as ketones and esters, and it has good heat resistance and chemical resistance. Therefore, it is widely used in surface treatment and printing rollers, or in general industrial rollers requiring heat resistance (up to 150°C) and chemical resistance. However, its drawback is that it has relatively poor wear resistance.
CSM
Chlorosulfonated Polyethylene (CSM) exhibits excellent heat resistance, chemical resistance, ozone resistance, weather resistance, and wear resistance. Its drawback is its high cost.
IIR
Isobutylene Isoprene Rubber (IIR) is resistant to polar solvents and has good heat resistance and chemical resistance. However, it lacks oil resistance and elasticity, and its processing is very difficult with challenging vulcanization. It is commonly used in automotive inner tubes. Rubber rollers made of IIR are used in printing rollers that require resistance to polar solvents, as well as in general industrial applications requiring heat-resistant rubber rollers.
PU
PU
Polyurethane Rubber, known as PU, exhibits excellent mechanical properties, abrasion resistance, and solvent resistance. However, it has poor heat resistance and alkali resistance. It is generally manufactured using liquid injection molding methods and is widely used in industries such as steelmaking, papermaking, and printing for varnishing.
Silicone
Silicone
Known as Silicone Rubber, it exhibits excellent high and low temperature resistance (approximately -50°C to 300°C) and is also highly resistant to cold temperatures. Due to its non-stick properties, it is widely used in applications such as film extrusion pressure rollers, PVC fabric embossing rollers, and tape guiding rollers. It can also be used for heat seal rollers and sizing rollers. Its main drawbacks include low mechanical strength and high cost. It can be formulated to have anti-static properties based on user requirements.
Q.Maintenance of Rubber and Silicone Rollers
Transportation Instructions
It is best to use a wooden crate when transporting rollers.
Attach a rope around the shaft or a wide leather strap around the center to lift the roller. Avoid attaching chains or wires directly to the rubber surface.
It is recommended to protect bearing components to prevent damage.
When using lifting equipment, be careful not to let lubricating oil splash onto the rubber roller surface. If it happens, wipe it off immediately.
It is recommended to protect bearing components to prevent damage.
When using lifting equipment, be careful not to let lubricating oil splash onto the rubber roller surface. If it happens, wipe it off immediately.
Storage Instructions
When storing rubber rollers, hold them by the shaft or store them upright in a cool, shaded place.
Do not store near electrical equipment such as motors or sterilizing lamps that generate ozone.
We recommend repolishing rollers stored for more than 6 months.
Wrapping the roller surface with paper slows down surface oxidation. For large and heavy rollers made of soft rubber materials, rotate them regularly to prevent deformation or bending.
We recommend repolishing rollers stored for more than 6 months.
Wrapping the roller surface with paper slows down surface oxidation. For large and heavy rollers made of soft rubber materials, rotate them regularly to prevent deformation or bending.
Instructions for Use
Pressure and Speed
The load capacity of rubber rollers varies depending on the rotational speed, rubber material, rubber hardness, rubber thickness, temperature, iron core structure, and chemicals involved.
Temperature
Avoid rapid heating. The maximum operating temperature for each rubber material can be found in the characteristics of each rubber grade, but the heat resistance of the bonding layer is lower than that of the rubber material. If the rubber roller is used at high temperatures, cool the roller from inside the core to reduce its temperature.
Chemicals
The chemical properties of each rubber material are mostly indicated in the characteristics of each rubber grade. If using rollers under special conditions, please provide us with the chemicals used so that we can select the appropriate rubber material.
Mechanical Factors
Wear on bearings, shafts, and gears, uneven loading, and machine vibrations can lead to excessive wear on the rubber surface or shorten the roller's lifespan.
These factors should be monitored carefully. Similar measures should be taken for unbalanced or misaligned rollers.
These factors should be monitored carefully. Similar measures should be taken for unbalanced or misaligned rollers.
Q.What is a rubber-silicone roller?
A rubber roller is "a core made of metal or other materials wrapped in rubber or elastic material”
Characteristics of rubber-silicone rollers:
・High coefficient of friction.
・Ability to quickly restore its original shape when deformed.
・Resistant to chemicals to protect the iron core and roller.
・Prevents damage from scratching and collisions.
・Compensates for minor variations in machine accuracy.
・Has many special applications.
The quality of the core (iron core):
Besides the quality of the rubber, the quality of the core is also crucial for various operating conditions. Inappropriate materials and structures can lead to serious issues. Generally, steel tubing is used as the core material, but for special purposes, materials such as stainless steel, aluminum, and plastics are also used. Core materials are also widely accepted for specific purposes, such as lightweight requirements. The structure of roller cores varies depending on the application conditions. Please consult our sales personnel for more information.
Balancing of rollers
As machinery continues to evolve for faster operations, issues arising from roller imbalance also increase. These problems include vibration, noise, premature wear of bearings, cores, gears, rubber wheels, and premature damage to the machinery itself. The root cause of these issues is the rapid increase in centrifugal force due to roller imbalance as the roller speed increases.