PERMABOND UV648

Harmonization Code : 3907.30.00.40 | Epoxy Mold Compounds containing by weight more than 70 % silicon dioxide

PERMABOND UV648

Main features

  • Non-Drip Application Control
  • UV-Stabilized Plastic Bonding
  • Colorless High-Elongation Cure

Product Description

Permabond UV648 is a single-part, non-drip urethane-methacrylate adhesive for UV bonding of acrylic, UV-stabilized plastics, glass, and metals. Its long-wavelength photoinitiator supports cure through UV-stabilized plastic, while the clear formulation produces a colorless bond. At 25 deg C, viscosity is 20,000 to 40,000 mPa s at 20 rpm, and typical fixture time is 2 to 10 seconds under the listed lamp conditions. Cured properties include more than 70% elongation, 50 to 65 Shore D hardness, and overlap shear values above 7 N/mm^2 on polycarbonate and above 4 N/mm^2 on acrylic and PET.

Key features

  • Non-Drip Application Control: High shear-dependent viscosity limits flow before UV cure.
  • UV-Stabilized Plastic Cure: A long-wavelength photoinitiator supports cure through UV-stabilized plastics.
  • Colorless Flexible Bond: The cured adhesive is colorless and provides more than 70% elongation.

Applications

Applications include bonding acrylic, UV-stabilized plastics, glass, metals, polycarbonate, and PET where UV transmission is adequate.

Product Family

PERMABOND UV648

Loading pricing…
TDS, SDS & Technical Documents

Technical Specifications

General Properties
Appearance
Appearance at room temperature.
Colorless, clear
Refractive index
The refractive index determines how much the path of light is bent, or refracted, when entering a material. It is calculated by taking into account the velocity of light in vacuum compared to the velocity of light in the material. The refractive index calculation can be affected by the wavelength of light and the temperature of the material. Even though it is usually reported on standard wavelengths it is advised to check the TDS for the precise test parameters.
>1.490
Specific Gravity
Specific gravity (SG) is the ratio of the density of a substance to the density of a reference substance; equivalently, it is the ratio of the mass of a substance to the mass of a reference substance for the same given volume. For liquids, the reference substance is almost always water (1), while for gases, it is air (1.18) at room temperature. Specific gravity is unitless.
1.1
Physical Properties
Viscosity
Viscosity is a measurement of a fluid’s resistance to flow. Viscosity is commonly measured in centiPoise (cP). One cP is defined as the viscosity of water and all other viscosities are derived from this base. MPa is another common unit with a 1:1 conversion to cP. A product like honey would have a much higher viscosity -around 10,000 cPs- compared to water. As a result, honey would flow much slower out of a tipped glass than water would. The viscosity of a material can be decreased with an increase in temperature in order to better suit an application
20,000-40,000 | 120,000-180,000 mPa.s
Mechanical Properties
Elongation
Elongation is the process of lengthening something. It is a percentage that measures the initial, unstressed, length compared to the length of the material right before it breaks. It is commonly referred to as Ultimate Elongation or Tensile Elongation at break.
>70 %
Electrical Properties
Dielectric Strength
Dielectric strength is measured in kV per mm and is calculated by the Breakdown voltage divided by the thickness of the tested material. Those two properties go hand in hand and while Breakdown voltage is always thickness dependent, dielectric strength is a general material property. As an example, the dielectric strength of Polyimide is 236 kV/mm. If we place 1mm of Polyimide between two electrodes, it will act as an insulator until the voltage between the electrodes reaches 236 kV. At this point it will start acting as a good conductor, causing sparks, potential punctures and current flow.
25-30 kV/mm
Chemical Properties
Water Absorption
<3.5 %
Other Properties
Storage Temperature
5 - 25 °C

Additional Information

Technical properties

As-supplied / before-processing properties

Fixture time depends on lamp output, distance, and substrate transmission.

Property Value Unit Method / condition
Chemical compositionUrethane methacrylateAs supplied
AppearanceColorless, clearAs supplied
Viscosity20,000 to 40,000mPa sAt 25 deg C; 20 rpm
Viscosity120,000 to 180,000mPa sAt 25 deg C; 2.5 rpm
Specific gravity1.1As supplied
Typical fixture time2 to 10secondsListed UV lamp conditions
Cure wavelength365 to 420nmMatch lamp output to the photoinitiator
Technical properties

After-processing / final-state properties

Values are typical cured properties for the stated methods and substrates.

Property Value Unit Method / condition
Overlap shear strength - polycarbonate>7N/mm^2ISO 4587; substrate failure observed
Overlap shear strength - acrylic>4N/mm^2ISO 4587
Overlap shear strength - PET>4N/mm^2ISO 4587; substrate failure observed
Tensile strength11N/mm^2ISO 37
Refractive index1.490Cured adhesive
Elongation at break>70%ISO 37
Hardness50 to 65Shore DISO 868
Dielectric strength25 to 30kV/mmTypical cured value

Leading Brands Trust in Our Products and Services

Products that Perform| Knowledge that Serves| Service that Delivers