The composition and use of conductive glue, the best brands and how to do it yourself
Conductive adhesives are widely used in the development of electronic devices and technologies. These solutions provide reliable connection of internal components, microcircuits and other elements. There are many types of glues that differ in their physical properties and composition.
Description and application of conductive glue
Conductive glue is a versatile tool used in various branches of mechanical engineering, the production of technical devices and the repair of electronic ear tags. Due to the heat resistance index, the substance is suitable for the installation of heating and underfloor heating systems.
Required Properties of Conductive Adhesive
An obligatory element in the composition of the glue is powdered nickel or finely dispersed silver. Alternatively, crushed palladium can be used. The listed components give the composition the characteristics of electrical conductivity. The higher the content of the element in the substance, the better the conductivity properties, but the strength of the connection decreases.
To impart good elasticity, without compromising other characteristics, a polymer binder is added to the glue. The compound also provides reliable grip and reduces density. Any type of conductive glue must have the following properties and characteristics:
- dry quickly after application to the surface for faster work;
- have a viscous structure so as not to damage microcircuits and other elements during use;
- have high rates of surface adhesion and strength;
- do no harm to people and the environment.
How to make an electrically conductive adhesive
You can make conductive glue with your own hands in a home environment. If it becomes necessary to repair electrical appliances or perform another task using an adhesive solution, all you need to do is find the right components and mix them correctly. Depending on the specific purpose of using glue, it is necessary to determine the required type of substance, since the composition and method of manufacture of different options are different.
Aluminum
Aluminum belongs to the category of metals characterized by their lightness, resistance to external factors and high strength. The main disadvantage of aluminum is the lack of adhesive properties, so it can only be welded or glued.
The composition of the adhesive solution for aluminum working should contain acids and alkalis that can destroy the oxide shell, increase adhesion and ensure reliable adhesion.
Aluminum glue can be made with epoxy resin. The aluminum powder will act as a conductive filler. The resin is thoroughly mixed with the powder until a thick consistency is formed.Immediately before use, the resulting composition is mixed with a hardener in the proportions of 10:1.
Money
This type of substance is made from fine silver, acetone, simple nail polish, graphite powder and a polymer component (for example, vinyl chloride-vinyl acetate). To prepare the glue, you must:
- Particles of silver, graphite, polymer and acetone are mixed in a porcelain mortar or other similar container.
- Lacquer is poured into the crushed substances to a powder state and mixed.
- After combining the components, a dark gray liquid is formed, resembling syrup in structure.
The prepared substance should be stored in a glass container with a tightly closed lid. Stir the glue well before each use. After applying to the surface, it takes about 15 minutes to dry completely.
Graphite
To make an electrically conductive graphite-type glue, powdered graphite must be mixed with silver particles, similar to the production of silver glue. The difference is the composite polymer binder. For a graphite substance, the binder is composed of nitrocellulose, rosin and acetone. By mixing the powder and the polymeric substance, a ready-to-use solution is obtained.
You can get graphite for making glue from a simple pencil or from a finger-type stack equipped with a graphite rod. The component is also sold in a number of specialty stores.
Choose glue in store
There are a wide variety of adhesive solutions in the market that have the property of electrical conductivity. When choosing, give priority to good conductivity or adhesion and rapid solidification. The best option is a substance recommended for use in the field of mechanical engineering.
A large number of companies are engaged in the production of conductive glue, and eminent manufacturers do not always offer the best product. To find a suitable option, taking into account the goals of further application, it is worth getting acquainted with common varieties and taking into account their characteristics and physical properties.
"Contactol"
The glue produced under the Kontaktol brand is an innovative development of the German manufacturer Keller. The product is intended for mounting microcircuits, repairing tracks on printed circuit boards, eliminating defects on the contacts of electrical devices. The substance quickly hardens, and after 5-7 hours absolute polymerization occurs. To accelerate the solidification process, it is allowed to warm the treatment site with hot air.
Permatex
Permatex brand adhesive is a two component conductive composition. The main objective is the restoration of glass heating wires. The advantage of this type is its high resistance to temperature extremes and the influence of ultraviolet radiation. Best results are obtained by using Permatex at an ambient temperature of at least 10 degrees.
TPK-E
TPK-E glue is used to bond aluminum, stainless steel and carbon fiber products to each other and in various combinations. Grouting helps provide an electrical connection with transient resistance. Due to its consistency and composition, the product removes static charges from the material.
Forbo 615 Eurostar Lino EL
Forbo conductive glue is virtually odorless and has a translucent consistency.Most often, the substance is used for repair work, including fixing carpets, linoleum and other materials to the floor.
CompletedDeal
The American manufacturer's DoneDeal glue has good adhesion to most materials. The product is water resistant and suitable for boat repair. Subject to the rules of use, the strength of the glue line in terms of strength exceeds the strength of the material to be processed.
Homakoll
Honakoll products are specially designed for bonding roll-up flooring to a fabric or velor backing. The solution is characterized by the following properties:
- no volatile solvents in the composition;
- low water content;
- shrinkage resistance after hardening;
- minimal risk of shearing and flaking after adhesion to the surface;
- easy application with notched trowel;
- fire safety.
MASTIX
Mastix brand substance, also known as cold welding, is superior in a number of indicators to similar products. The composition can be used at extremely low and high temperatures without losing its original properties. Most often, Mastix glue is used to join metal products; it is also used to fill cracks and various holes. Under the Mastix brand, universal formulations are produced for use in specific areas.
VolgaKhimProm
Conductive adhesive "VolgaKhimProm" is used as a restorative and reinforcing compound. After application to the surface, the product hardens completely in 30-50 minutes, depending on the thickness of the layer. VolgaKhimProm products are suitable for household and industrial use.The composition does not negatively affect the skin, respiratory tract and mucous membranes, which makes it safe.
Features of the use of conductive glue
When using glue, it is necessary to take into account a number of features. The main point is the quick drying of the solution, therefore, after application, it is necessary to immediately connect the parts.
In terms of composition, the substance is safe for humans, and if glue gets into open areas of the body, you just need to rinse the skin with warm water and soap. If the substance comes into contact with the eyes, prompt professional assistance will be required.