Encapsulation of Plastic Components
In many applications plastic components are manufactured and then encapsulated. A range of sealing compounds, encapsulants and potting compounds are available for different applications:
Flexible acrylates have a stress-equalizing effect and protect plastic components from impact and vibration. Rigid potting compounds, on the other hand, can reinforce and also carry heavy loads.
UV- and LED-curing acrylic-based adhesives are especially suitable here due to their short curing times, which speed up production and therefore reduce production costs. A prerequisite is that the plastics are transparent and not impermeable to UV light. For joints with undercuts or shaded zones, dual-curing adhesive systems are used. These are thermally cured following initial UV curing. Non-transparent substrates can be bonded with epoxy adhesives that cure thermally or at room temperature.
Dual-curing adhesives are also employed for particularly thick adhesive layers. Alternatively, thick layers can be cured with longer-wavelength light (about 405 nm LEDs), with which layers of several millimetres’ thickness can be cured.
Blue uv-moisture curing adhesive is used as encapsulant for electronic components
The table below lists a selection of adhesives from Hoenle that are suitable for encapsulation. Further products and custom solutions are available on request. To download the technical datasheets (TDS) please click on the adhesive name.
| Adhesive | Application Areas | Viscosity [mPas] | Base | Curing * | Substrates | Special Properties |
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| - | 7,000-15,000 mix (LVT, 25°C, Sp. 4/30 rpm) | 2-part epoxy | thermal, room temperature |
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| - | 3,000-4,000 mix (LVT, 25°C, Sp. 4/30 rpm) | 2-part epoxy | thermal room temperature |
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| - | 5,000-8,000 (LVT, 25 °C, Sp. 4/30 rpm) | epoxy | UV |
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| - | 70-150 | acrylate | UV VIS |
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900-1,500 (LVT, 25°C, Sp. 3/30 rpm) | acrylate | UV VIS |
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| - | 700-1,000 | acrylate | UV VIS secondary heat cure |
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250-500 | acrylate | UV VIS |
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30-100 | acrylate | UV VIS |
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40-70 | acrylate | UV VIS |
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3,000-5,000 | acrylate | UV |
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| - | 200-400 | acrylate | UV |
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| - | 700-1,200 | acrylate | UV |
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| - | 4,000-7,000 | acrylate | UV |
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| - | 15,000-25,000 | acrylate | UV VIS secondary heat cure |
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19,000-32,000 (Rheometer, 25°C, 10s^-1) | acrylate | UV VIS |
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1,000-1,500 | acrylate | UV VIS |
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| - | 10-100 | acrylate | UV VIS |
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*UV = 320 – 390 nm VIS = 405 nm
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