UV Adhesives
Ultraviolet adhesives, commonly known as UV adhesives, are one part (no mixing required), high performance adhesives which gets cured under the presence an ultraviolet light source. Ultraviolet adhesives require no heat or oxygen for their activation process’ hence they are excellent choice for bonding heat sensitive parts.
Ultraviolet adhesives generally have a transparent or a clear color, that’s why are preferred in applications where a visible bonding line is not desired. Available in different viscosities (high-medium-low), Ultraviolet adhesives often get efficiently cured in a matter of seconds when they are exposed to an ultraviolet light source with a proper wavelength/intensity. Ultraviolet adhesives are easy to apply and once they are cured, they tend to create a durable bond which is resistant against impacts, vibration, and temperature changes.
UV Adhesives Requirements
UV adhesives can be considered as an excellent solution for many occasions, but they can only be used if certain conditions are met. These conditions generally depend on the type of the material and the properties of those materials.
As a part of the electromagnetic spectrum, UV light is the name given to the electromagnetic radiation differing between 10nm and 400nm. Divided into several sections, most known ultraviolet light sections are ultraviolet A (UV-A), ultraviolet B (UV-B) and ultraviolet C (UV-C) whose wavelengths are between 315nm-400nm, 280nm-315nm and 100nm-280nm respectively.
UV Adhesives Materials
Since UV adhesives requires a light source, at least one of the materials that the UV adhesives will be applied on must be transparent. However, even if both of the materials are transparent, If they contain UV blockers, the UV light will not go through the material therefore the curing process will not start.
UV adhesives can be used with metals, plastics, ceramics, composites, and glass but for the adhesive to function efficiently, at least of the parts must be transparent and UV Blocker free, otherwise the UV light cannot cure the adhesive. That’s why it is not recommended to use UV adhesives with steel-steel, stainless steel-stainless steel etc. applications.
Light Source
The light coming from the sun, or the light bulbs enters to the visible light category, that’s why specialized tools are required for the curing process of UV adhesives. As a part of the electromagnetic spectrum, UV light is the name given to the electromagnetic radiation differing between 10nm and 400nm. Divided into several sections, most known ultraviolet light sections are ultraviolet A (UV-A), ultraviolet B (UV-B) and ultraviolet C (UV-C) whose wavelengths are between 315nm-400nm, 280nm-315nm and 100nm-280nm respectively. Since there are different sections in the UV light spectrum, there are different tools in existence;
- General Version: This version only emits a certain wavelength and covers a big area. The disadvantages of this version are the fact not every point of the adhesives receives the same amount of beam, and the tool requires a certain amount of time heat up and become functional and time to cool down once turned off before becoming usable again.
- Specialized Version: This version emits specific wavelength but covers a small area. It does not require time to heat up or cool down however it cannot cover the same area that the general version covers. This version is also called LED UV source.
Industries
UV adhesives are being used in various industries and in various processes;
- Glass Bonding: The stability, excellent bonding strength and the transparency of UV adhesives makes them an ideal choice where resistance against humidity and sunlight are also a requirement.
- Structural Bonding: Glass balconies and staircases can benefit from the UV adhesives’ resistance against humidity and from their transparent property.
- Plastic Bonding: Point of sale items and signs can benefit from fast and strong adhesion properties of UV adhesives.
- Disposable Medical Devices: Biocompatible UV adhesives is important in medical sector because they can be applied to a vast range of materials.
- Automotive Assembly: Headlamps and seat-belt monitoring switches can use UV adhesives where a large and fast volume of manufacturing is required.
- Touch Screens & Flat Panel Displays: Some variety of UV adhesives can be formulated to be used in optical and digital bonding applications. These adhesives are important because they get cured fast and the parts can be repositioned continuously until they are ready to be cured.
- Electronics: UV adhesives are mainly used in electronics sector for bonding, gasketing, sealing, encapsulating and conformal coating processes along with other processes.
Why choose UV Adhesives
Manufacturers prefers UV adhesives various reasons;
- In medical, optical and electronic industries accuracy is vital hence the adhesive shouldn’t start being cured as soon as it is applied.
- UV adhesives connects high stability with flexibility when cured.
- They can be cured under seconds when exposed to a UV light source.
- The transparent and/or clear state of UV adhesives makes an excellent choice for areas where the visible bonding lines are not desired.
Adhetron’s Solutions
As ADHETRON, we are aware of the current situation in today’s industry and are here to meet the demands of the manufacturers. We offer a variety of solutions to various industries. However, to choose the correct adhesive, some questions must be considered;
- Where will the adhesive be used?
- What kind of materials the parts are made of?
- What is the gap between parts?
- To which conditions the bonded parts will be subjected to?
After answering all these questions, we can offer you the best adhesive to fix your solutions. Some of our solutions are;
Medical Sector
- UV 6052 à UV and heat curable, medium viscosity, solvent free, medical grade adhesive. (Link ekleyebiliriz urune)
- UV 6330 à UV curable, high viscosity, solvent free, medical grade adhesive. (Link ekleyebiliriz)
- UV 7410 à UV or sun light curable, low viscosity, solvent free, medical grade adhesive. (Link ekleyebiliriz)
Glass Industry
- UV 8106 à Medium viscosity product suitable for bonding metal, glass, and various types of plastic. (Link ekleyebiliriz)
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Electronics Industry
- UV 5975 à UV curable, medium viscosity, solvent free, epoxy based adhesive and glob-top compound.
- UV 9172 à UV or visible light curable, high viscosity, solvent free, acrylate based adhesive and glob-top compound.
- UV-SIL RTV 3011 à Low viscosity, dual-cure product formulated for potting, encapsulating, and coating of electronic parts.
- UV-SIL RTV 3022 à Medium viscosity, UV light or room temperature curable, silicone-based product formulated for potting, encapsulating, and coating of electronic parts.
Plastic Industry
- UV 7055 à High viscosity, acrylate based, adhesive designed for bonding dissimilar substrates like metals, plastics, composites, and ceramics.
- UV 8209 à Medium viscosity, acrylate based, solvent free adhesive designed for bonding plastics such as PC, PMMA, PUR, PVC, and PA.
SOURCE
https://en.wikipedia.org/wiki/UV_curing