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COMPOUNDS
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A Compound is mixture of various ingredients with its base polymer to obtain the required physical and chemical properties according to industry specifications.
Nitrile NBR
The workhorse compound of roller manufacturing, nitrile rubber (NBR) makes up 60% of all polymer used in the industry. Sigma roolers Ultima Compounds are well-suited to a variety of roller applications because of their chemical resistance and physical properties, including:
Resistance to aliphatic hydrocarbons (i.e. oil-based inks)
Compounding versatility for a variety of end-use applications
Cost effectiveness
Ease of manufacturing
Sigma Rollers' Nitrile Rubber Compounds are highly resilient, abrasion resistant and offer good general resistance to solvents, oil and water. Our engineers also can formulate nitrile compounds to meet specific requirements of your project.
Sigma Rollers' Ultima Nitrile/PVC Compounds offer the best characteristics of both nitrile and PVC, resulting in an excellent roll covering particularly for printing applications, which require resistance to chemicals plus a balance of physical properties:
Resistance to aliphatic hydrocarbons (i.e. oil-based inks)
Improved ozone resistance over straight nitrile
Improved abrasion resistance over straight nitrile
Enhanced grinding characteristics
These compounds are available in a hardness range of 15 to 95 Durometer Shore A, and each formulation offers easy fabrication in either extrusion or calendered sheet processes. Even the harder compounds are easy to work with and process well.
NITRILE / PVC
Sigma Rollers' Nitrile/PVC Compounds offer the best characteristics of both nitrile and PVC, resulting in an excellent roll covering particularly for printing applications, which require resistance to chemicals plus a balance of physical properties:
Resistance to aliphatic hydrocarbons (i.e. oil-based inks)
Improved ozone resistance over straight nitrile
Improved abrasion resistance over straight nitrile
Enhanced grinding characteristics
These compounds are available in a hardness range of 15 to 95 Durometer Shore A, and each formulation offers easy fabrication in either extrusion or calendered sheet processes. Even the harder compounds are easy to work with and process well.
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