Printing Presses: Solvent Resistance of Nitrile Rollers in Offset Printing
Problem Statement
Offset printing rollers face severe chemical degradation due to prolonged exposure to solvents like toluene, acetone, and isopropyl alcohol. Standard nitrile rubber (NBR) rollers exhibit swelling, loss of elasticity, and compression set failure, leading to print quality defects and downtime.
Material Science Analysis
Standard NBR fails due to its low acrylonitrile (ACN) content, which limits solvent resistance. High-ACN NBR (ACN > 40%) improves solvent resistance by increasing polarity, reducing solvent absorption. Fluorocarbon rubber (FKM) offers superior resistance but at higher cost and reduced flexibility. High-ACN NBR provides the optimal balance of cost, flexibility, and chemical resistance for offset printing applications.
Technical Specs
- Material: High-ACN NBR
- Shore A Hardness: 70 ± 5
- Tensile Strength: 18 MPa
- Elongation at Break: 350%
- Temperature Range: -20°C to 120°C
- Compression Set (22 hrs @ 100°C): 20%
Material Comparison
| Parameter | High-ACN NBR | Standard NBR | FKM |
|---|---|---|---|
| Shore A Hardness | 70 ± 5 | 60 ± 5 | 75 ± 5 |
| Tensile Strength (MPa) | 18 | 15 | 20 |
| Elongation at Break (%) | 350 | 400 | 200 |
| Temperature Range (°C) | -20 to 120 | -30 to 100 | -40 to 200 |
| Compression Set (%) | 20 | 35 | 10 |
| Solvent Resistance | High | Moderate | Exceptional |
Standard Compliance
RubberQ adheres to IATF 16949 standards for batch-to-batch consistency. Materials comply with ASTM D2000 for material callouts and ISO 3601 for sealing performance. Surface preparation and bonding processes meet ASTM D429 adhesion testing requirements.
For custom material compound development or IATF 16949 documentation, consult RubberQ’s engineering department.
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