WORLD ROCK UV curing hot melt

What is UV curing hot melt?

How to provide solutions by adhesive's process.
- Realization of selective application to reduce overflow.
- Higher shape retention properties even though before curing.
- Low-High tensile modulus are able to apply varieties device.
Characteristic
Low tensile modulus Gel (Elasticiy:1.0E+02~1.0E+03 Pa)
- Pre-curing (less pre-Alignment)
- Reduce air bubble, follow steps, reduce stress.
Adding UV cure function.
- Reversible function gets dissipated by UV irradiation.
- Maintain uniformity, good addhesive strength, endurable reliability.
Spec
- Able to customize optical, physical performance based on requirement.
Content | Property reference Representative value(After curing) |
---|---|
Appearance | Transparent |
Transition Temperature Tg | 20~60(G'=G") |
Applied temperature(℃) | 60~80 (η=5000 mPa・s) |
ecommended curing condition(mJ/c㎡) | 1,000~3,000(400mW/c㎡) |
Tensile modulus(Pa) | 1.0E+04~1.0E+09 |
Elongation rate(%) | 2~350 |
Tensile strength(Pa) | 1.0E+05~1.0E+07 |
Transmittance(%) | >95.0(400nm) |
Yellow Index | <1.0 |
HAZE(%) | <1.0 |
※ Able to customize optical, physical performance based on requirement.
Application
High aspect ratio and make Flat film forming.
Lamination for various structures.
Sealing, Reinforcement, Overflow, and Flow Control
pre-Alignment.
Principle
Reversible Gel and Liquid by temperature.
- Heat up application provides several method.(Slit, Di coting, Jet dispense, and others.)
- Temperature change. (tensile modulus, viscosity)
Process | UV curing hot melt | Newtonian liquids |
---|---|---|
During application | Required for heating | No heating required |
After application | Rapid viscosity increase & gelation by cooling | Liquid does not change |
hape retention | Almost no fluidity due to gel condition | Overflow is occurred |
- Reversible change (tensile modulus)
Several above features provide benefits as below.
- Able to make free and variety shapes.(3D, Sheet, High aspect.)
- Able to control overflow.
- Able to do de-assemble by heat. (repare, pre-Alignment.)