For high performance
Optimal protection for extreme demands
BECTRON® MR 34.. series is a set of thick film coating melting resins developed for rapid and
simple protection of electronics. The material is based on modified polyolefin and is solventfree
with zero VOC. Polyolefin resins offer better moisture resistance and adhesion than standard
hot melt materials based on polyamide chemistry.
BECTRON® MR 34.. series forms a soft and flexible encapsulation, operating over the temperature
range -40 °C to 145 °C.
The electrical insulation properties are excellent with very good adhesion to many substrates.
Strong chemical resistance protects against acids, alkalis and polar solvents and also fungal
growth, but not to aliphatic and aromatic and chlorinated hydrocarbons.
Application of thermoplastic resins is particularly easy with a melting resin applicator, heated
dispensing or monofilament system. With the monofilament system it is possible to reach
thickness of approx. 200 – 400 μm. The removal of melting resin for repair or re-work is also
very simple. Above the respective melting temperature, the melting resin is ready to use.
On cooling to +105 °C it hardens to a solid. BECTRON® MR resins are ideally suited for high
volume production lines with very short process time. Due to their low polarity, BECTRON®
MR 34.. products have excellent electrical insulation properties. This is particularly advantageous
in high humidity environment and at higher frequencies (MHz to GHz range).
Melt viscosities in the range 520 mPas to 9.250 mPas are available to suit more requirements.
BECTRON® MR34.. series has very good electrical properties particularly suitable for a wide
range of electronic elements. It provides protection against moisture, corrosion, vibration
and migration. BECTRON® MR is used very successfully in many different applications, from
securing of individual components to the protection of hybrids and whole assemblies.
Melting Resins for high performance
BECTRON® MR 34 series is a one-component melting resin thick film coating, developed
for electronic application. It is based on polyolefin resin chemistry, which is better suited to
electronics than conventional polyamide based hot-melt thermoplastic:
One component / “Ready to use”
Zero VOC / 100 % solids
Environmentally friendly / non-hazardous classification
Ideal dielectric properties for electronic applications, i.e. at high frequencies
Very low water absorption, excellent protection against humidity
Very good adhesion on PCB´s
Possible to reach thick film thicknesses of 200 μm to 400 μm as well as for potting applications
Repairable / recycling possible
BECTRON® MR series (Polyolefine, Thick-Film, Melting Resin, Potting)
Color UL 94 Max. operation
BECTRON® MR 3402 9250 mPa·s @ 190 °C Yellow – 125 15 130
BECTRON® MR 3404 1100 mPa·s @ 180 °C Yellow – 105 22 107
BECTRON® MR 3404 H 2000 mPa·s @ 170 °C Yellow – 100 75 105
BECTRON® MR 3405 2100 mPa·s @ 190 °C Yellow – 145 30 155
BECTRON® MR 3405 H 2000 mPa·s @ 190 °C Yellow – 140 53 153
BECTRON® MR 3405 FR 2000 mPa·s @ 200 °C Black V-0 145 35 156
BECTRON® MR 3406 520 mPa·s @ 180 °C Yellow – 125 15 138
BECTRON® MR 3406 FR 800 mPa·s @ 190 °C Black V-0 125 16 139
BECTRON® MR 3406 H 2000 mPa·s @ 180 °C Yellow – 125 65 136
BECTRON® MR 3406 FR H 2500 mPa·s @ 190 °C Black V-0 125 63 136
Temperature operation, max
MR 3406 H
MR 3404 H
Yellow Black, UL 94 V-0
MR 3405 FR
MR 3405 H
3406 FR H
10 30 50 70
Shore A Shore A Shore A Shore A
ELANTAS Europe GmbH
Grossmannstr. 105 · 20539 Hamburg · Germany
Tel.: +49 40 78946 0 · Fax: +49 40 78946 360
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