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RESEARCH
AND DEVELOPMENT NEWS - Electron Beam Irradiation Technology for Thin Rubber Products
Working
principle
Basic
Principle Is The Same As A TV. Accelerators
work on the same principle as a television tube. Electrons
are generated by a heated filament, which forms the
electron gun. A voltage gradient draws the electrons away
from the gun and accelerates them through the vacuum tube.
As the high voltage beam of electrons passes from the beam
tube and through the scan magnet, an oscillating magnetic
field sweeps the beam back and forth across the scan
window.
Advantages
Cables,
Heat Shrink Tubes, PE Foams etc, are subjected to E-Beam
Radiation with extreme advantages compared to other
cross-linking system. Cross-linking of O Rings, K-Rings,
Gaskets, Diaphragms, Seals revealed extremely positive
results compared to the conventional curing system.

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The
Comparison Table
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E-Beam
Radiation Curing System
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Conventional
Sulphur / Peroxide Curing System
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Direct
Cross-linking by C-C linkage by electron beams
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Cross-linking
by C S x C linkage (x = 1,2,3
.) or C
O x C linkage (x = 1,2,3
.)
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Extremely
Strong Bonds
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Comparatively
weaker bonds
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Zero
blooming effects
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Sulphur/Oxide
have chance to bloom to periphery leading to surface
deterioration
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Extremely
High Tensile Strength
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Lower
Tensile Strength
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Extremely
high resistance to Compression Set
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Lower
resistance to Compression Set
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Extremely
high resistance to Oils, Grease, Lubricants
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Lower
resistance to Oils, Grease, Lubricants
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Highly
improved Accelerated Ageing properties
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Lower
accelerated ageing properties compared to E-Beam system.
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Lower
material waste
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Higher
Material Waste
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Extremely
short curing cycles
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Comparably
curing time is quiet high
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Very
high productivity
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Lower
productivity
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Perfect
for thin products
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Good
for bigger products
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Reason
for Improvement
- High Degree of Cross-Linking
- No Polymer degradation due to high temperature as EB Cross-linking occurs at room temperature
- No Oxidative degradation in polymers as observed in chemical cross-linking
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