Rodillos personalizados de caucho NBR/nitrilo

Los rodillos de caucho NBR/nitrilo se utilizan habitualmente en posiciones que entran en contacto con aceite mineral, aceite lubricante, grasa, ciertas tintas, adhesivos y líquidos industriales en general.

NBR también se conoce como caucho nitrilo, Buna-N o caucho acrilonitrilo-butadieno. En rodillos no debe seleccionarse solo por el nombre: formulación, dureza, espesor, acabado, adhesión y medios de contacto influyen en el resultado.

Esta página ayuda a decidir si NBR estándar es adecuado o si debe considerarse un nitrilo modificado por calor, desgaste, ozono, compatibilidad o vida útil.

No necesita tener toda la información preparada antes de ponerse en contacto con nosotros.

Blue NBR rubber rollers with machined steel shafts

Aplicaciones y ajuste de material

NBR se revisa cuando se necesita mejor resistencia al aceite que muchos cauchos de uso general, manteniendo contacto estable.

Direcciones habituales:

rodillos guía o de contacto con aceite

contacto con lubricante o grasa

determinadas tintas

adhesivos

líquidos industriales

sustituciones donde el material original era NBR/nitrilo/Buna-N

In liquid-related sections, rodillos de transferencia y rodillos dosificadores often need controlled surface behavior for ink, coating, adhesive, or similar media. In feeding or movement-control sections, rodillos de tracción may use NBR when oil resistance and surface grip both matter.

NBR can also be reviewed for some Rodillos para la industria de impresión y Rodillos para líneas de recubrimiento y laminación, but the actual ink, adhesive, coating liquid, cleaner, temperature, and contact pressure still need to be checked.

Cuándo NBR es un buen punto de partida

NBR is usually a good starting material direction when oil resistance is important and the working environment is not extremely aggressive.

Condición Dirección de revisión
Contacto claro con aceite, grasa o lubricante NBR estándar debe entrar normalmente en la revisión
Interior, condiciones industriales estándar Suele ser práctico y rentable
Determinadas tintas, adhesivos o líquidos Revisar NBR junto con detalles reales del medio
El rodillo anterior era NBR y funcionaba aceptablemente Usar esa dirección como referencia
El problema principal es desgaste/carga, no aceite Comparar PU u otro material de desgaste
El problema es más calor, medios agresivos o disolventes fuertes FKM, HNBR u otro compuesto puede ser más seguro
El problema es ozono, UV o exterior EPDM, CR, CSM u otro material resistente a intemperie puede ser mejor

Contacto claro con aceite, grasa o lubricante

NBR estándar debe entrar normalmente en la revisión

Interior, condiciones industriales estándar

Suele ser práctico y rentable

Determinadas tintas, adhesivos o líquidos

Revisar NBR junto con detalles reales del medio

El rodillo anterior era NBR y funcionaba aceptablemente

Usar esa dirección como referencia

El problema principal es desgaste/carga, no aceite

Comparar PU u otro material de desgaste

El problema es más calor, medios agresivos o disolventes fuertes

FKM, HNBR u otro compuesto puede ser más seguro

El problema es ozono, UV o exterior

EPDM, CR, CSM u otro material resistente a intemperie puede ser mejor

The material direction should follow the real working condition, not only the old material name.

Datos de referencia y nitrilos modificados

These points are useful when reviewing an NBR roller at the early stage. They are reference directions, not fixed limits for every project.

Artículo Elemento Dirección habitual
Significado práctico NBR, nitrilo, Buna-N, acrilonitrilo-butadieno Misma familia de material
Dureza común Aproximadamente 50–90 Shore A Afecta presión, agarre, deformación, marcas y desgaste
Temperatura Aproximadamente -30°C a +100°C según compuesto/condición Calor continuo, medio y presión deben revisarse juntos
Balance ACN Más ACN suele mejorar resistencia al aceite y reducir flexibilidad en frío Permite equilibrar aceite y flexibilidad
Superficie Lisa, rectificada, mate, ranurada, coronada, tracción o transferencia Debe corresponder a posición y medio
Límites NBR estándar no es la opción más fuerte frente a ozono, exterior prolongado o algunos disolventes agresivos Puede ser más seguro otro material

When standard NBR is close but not enough, a modified nitrile direction can be reviewed.

Nitrile-Based Option Typical Reference Direction When It May Be Considered
Standard NBR / Buna-N Commonly used for oil-contact, grease-contact, selected ink-contact, adhesive-contact, and standard industrial liquid-contact positions First review direction for many standard oil-contact rollers
High ACN NBR Stronger oil resistance, with less low-temperature flexibility When stronger oil resistance matters more than low-temperature flexibility
Low ACN NBR Better low-temperature flexibility, with lower oil resistance than high-ACN grades When flexibility at lower temperature matters and the oil-contact condition is not too aggressive
HNBR, hydrogenated nitrile rubber Better heat, oxidation, ozone, and ageing resistance than standard NBR; often reviewed for higher-temperature nitrile applications, roughly around -30/-40°C to +150°C depending on compound When nitrile-related oil resistance is still needed, but the roller also faces higher heat, ozone, or longer ageing requirements
XNBR, carboxylated nitrile rubber Improved abrasion resistance, tear strength, and mechanical toughness; hardness can often be reviewed across roughly 50–95 Shore A depending on compound When wear, tear, or mechanical stress is stronger than in a standard NBR roller position
NBR/PVC blend Keeps the oil-resistance direction of NBR while improving ozone, weathering, and environmental exposure performance When oil resistance is still needed, but ozone or open-environment exposure also matters
Custom modified NBR compound Adjusted around media compatibility, hardness, surface behavior, wear, grip, and service life When standard NBR is close, but the working condition needs a more specific balance

Significado práctico

Common Review Direction: NBR, nitrilo, Buna-N, acrilonitrilo-butadieno

Practical Meaning: Misma familia de material

Dureza común

Common Review Direction: Aproximadamente 50–90 Shore A

Practical Meaning: Afecta presión, agarre, deformación, marcas y desgaste

Temperatura

Common Review Direction: Aproximadamente -30°C a +100°C según compuesto/condición

Practical Meaning: Calor continuo, medio y presión deben revisarse juntos

Balance ACN

Common Review Direction: Más ACN suele mejorar resistencia al aceite y reducir flexibilidad en frío

Practical Meaning: Permite equilibrar aceite y flexibilidad

Superficie

Common Review Direction: Lisa, rectificada, mate, ranurada, coronada, tracción o transferencia

Practical Meaning: Debe corresponder a posición y medio

Límites

Common Review Direction: NBR estándar no es la opción más fuerte frente a ozono, exterior prolongado o algunos disolventes agresivos

Practical Meaning: Puede ser más seguro otro material

When standard NBR is close but not enough, a modified nitrile direction can be reviewed.

Standard NBR / Buna-N

Typical Reference Direction: Commonly used for oil-contact, grease-contact, selected ink-contact, adhesive-contact, and standard industrial liquid-contact positions

When It May Be Considered: First review direction for many standard oil-contact rollers

High ACN NBR

Typical Reference Direction: Stronger oil resistance, with less low-temperature flexibility

When It May Be Considered: When stronger oil resistance matters more than low-temperature flexibility

Low ACN NBR

Typical Reference Direction: Better low-temperature flexibility, with lower oil resistance than high-ACN grades

When It May Be Considered: When flexibility at lower temperature matters and the oil-contact condition is not too aggressive

HNBR, hydrogenated nitrile rubber

Typical Reference Direction: Better heat, oxidation, ozone, and ageing resistance than standard NBR; often reviewed for higher-temperature nitrile applications, roughly around -30/-40°C to +150°C depending on compound

When It May Be Considered: When nitrile-related oil resistance is still needed, but the roller also faces higher heat, ozone, or longer ageing requirements

XNBR, carboxylated nitrile rubber

Typical Reference Direction: Improved abrasion resistance, tear strength, and mechanical toughness; hardness can often be reviewed across roughly 50–95 Shore A depending on compound

When It May Be Considered: When wear, tear, or mechanical stress is stronger than in a standard NBR roller position

NBR/PVC blend

Typical Reference Direction: Keeps the oil-resistance direction of NBR while improving ozone, weathering, and environmental exposure performance

When It May Be Considered: When oil resistance is still needed, but ozone or open-environment exposure also matters

Custom modified NBR compound

Typical Reference Direction: Adjusted around media compatibility, hardness, surface behavior, wear, grip, and service life

When It May Be Considered: When standard NBR is close, but the working condition needs a more specific balance

The goal is to match the roller cover to the actual media, temperature, pressure, surface requirement, and expected service life.

Why Some Nitrile Rubber Rollers Become Unstable in Later Use

In some projects, the issue is not that the roller cannot be installed at the beginning, nor that it cannot run at all.

A more common situation is that it works at first, but after a period of use it gradually shows softening, swelling, surface changes, short service life, or repeated rework without a stable long-term result.

These situations are commonly related to factors such as:

  • Whether the compound matches the actual contact media
  • Whether the hardness is suitable for the roller position
  • Whether the surface treatment matches the contact condition
  • Whether the rubber cover and construction are stable
  • Whether material quality and manufacturing consistency vary from one supplier to another

So even when the material is described as NBR / nitrile, actual results can still vary significantly.

Red NBR rubber rollers wrapped for protection with steel shafts

Ejemplos de revisión de solicitudes

Oil-Contact Replacement Roller

A roller works with lubricating oil, and the old cover was already nitrile. It did not swell, but the surface became polished and grip decreased after running.

NBR may still be a reasonable direction. The review should focus on hardness, surface finish, cover thickness, contact pressure, and whether a more traction-oriented surface is needed.

Ink or Adhesive Contact With Surface Changes

A roller works near an ink or adhesive-contact section. It runs normally at first, but later shows softening, tackiness, residue build-up, or difficult cleaning.

The material should not be confirmed only because NBR is oil-resistant. Ink composition, adhesive type, solvent content, cleaner, temperature, and contact time should be checked.

Warm Oil or Outdoor Exposure

A roller contacts oil near a warm section, or works in an environment with ozone, sunlight, or weather exposure. The old roller shows short service life, cracking, or hardening.

Standard NBR may not be enough. A modified nitrile compound or another rubber material may need comparison according to the actual condition.

Diseño y personalización

For NBR rollers, material selection is only one part of the result. The final roller also depends on the compound, hardness, cover thickness, surface finish, bonding, core structure, and installation details.

Common customization and review points include:

  • standard NBR or modified nitrile compound direction
  • hardness and rubber cover thickness
  • smooth, ground, matte, grooved, crowned, traction-oriented, or transfer-oriented surface
  • roller core material and structure
  • shaft end, bearing seat, and mounting details
  • bonding between rubber cover and metal core
  • dynamic balance or runout review when required by the roller position
  • production based on drawings, samples, old rollers, or operating conditions

Preguntas frecuentes

En muchos casos, sí.
En muchos casos, sí. Para aceites, lubricantes y determinadas tintas/adhesivos, NBR es una de las direcciones habituales.

No.
Many standard oil-contact projects do not need to start with FKM.
A more suitable approach is to first confirm whether the project requires standard oil resistance or a higher level of temperature and chemical resistance.

Not in an absolute way.
If the temperature is higher, or if continuous operating conditions are more demanding, it is better to confirm the material direction together with the actual media and operating conditions.

Sí.
Sí. Posición, dimensiones básicas, material de contacto, medio, temperatura y problema actual son suficientes para iniciar la revisión.

Swelling or softening is often related to media mismatch, solvent exposure, cleaner contact, high temperature, or unsuitable compound selection.

Modified nitrile may be reviewed when standard NBR is close but not enough. For example, HNBR may be reviewed for better heat, ozone, and ageing resistance; XNBR may be reviewed for stronger wear and tear resistance; NBR/PVC may be reviewed when oil resistance and environmental exposure both matter.

Fabricación de rodillos a medida, formulaciones y control de calidad

Un rodillo de caucho fiable depende de algo más que la coincidencia dimensional. La formulación del compuesto, la estabilidad de dureza, el espesor del recubrimiento, el acabado superficial, la estructura del eje y la precisión de giro influyen en su comportamiento en la línea.

Wolorin trabaja tanto en sustituciones rutinarias como en proyectos industriales de rodillos de caucho a medida más exigentes, con experiencia de fabricación, equipos de producción e inspección, certificaciones disponibles y controles de calidad documentados. Nuestro sistema de formulación de compuestos puede adaptarse a diferentes requisitos de operación.

Antes del envío pueden comprobarse, según el proyecto, elementos clave como dureza del recubrimiento, detalles del eje, estado superficial y precisión de giro.

Puede consultar nuestro ámbito de fabricación, el proceso de control de calidad y los antecedentes de la empresa en las páginas que aparecen a continuación.

Solicitar presupuesto

Send the information you already have. It can be a drawing, old roller photo, basic size, contact media, or a short description of the current running problem.

If NBR is suitable, the roller can be reviewed around compound direction, hardness, cover thickness, surface finish, bonding, and roller position. If another material direction is safer, it is better to confirm that before production.