Ultra Light-Weld 9702

Ultra Light-Weld 9702 optical display adhesive cures upon exposure to UV/Visible light and is designed for use in flat panel displays where re-workability and non-yellowing characteristics are important. Bondable substrates include PC, PET, PMMA, glass, and stainless steel. Typical applications include optical display bonding and lamination of small hand-held screens, touch screens, and large display screens.

This material is easily re-workable for removal or repair by conventional methods such as wire cutting, while maintaining it’s bond strength over time. This can significantly increase yield and reduce display screen rejects. This non-yellowing adhesive maintains optical clarity over time for better performance and aesthetics and exhibits low shrinkage to minimize visible distortion after cure.

FEATURES:

UV/Visible light cure
Excellent re-workability
Non-yellowing
Low shrinkage
Bonds to a variety of surfaces
Medium vicosity performance
Good thermal shock resistance

APPLICATIONS:

Optical display lamination
Touch screens

Uncured properties
Property	Value	Test method
Solvent content	No Nonreactive solvent	N/A
Chemical class	Acrylated urethane	N/A
Appearance	Light yellow liquid	N/A
Soluble in	Organic solvents	N/A
Density, g/ml	0.93	ASTM D1875
Viscosity, cP (20rpm)	950 (nominal)	DSTM 502

Cured mechanical properties
Property	Value	Test method
Durometer hardness	00-70	ASTM D2240
Tensile at break, MPa [psi]	0.89 [129]	ASTM D638
Elongation at break, %	137	ASTM D638
Modulus of Elasticity, MPa [psi]	0.36 [52]	ASTM D638

Other cured properties
Property	Value	Test method
Boiling water absorption, % (2h)	0.35	ASTM D570
Refractive index (20°C)	1.49	ASTM D542
Water absorption, % (25°C, 24h)	0.42	ASTM D570
Volumetric shrinkage, %	4.2	DSTM 611

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