Impact glue, contact glue or neoprene glue, is a type of glue, used mainly to glue plastic foams, laminates, metal panels, etc. . It also allows the mounting of supports of different types (metal on wood, cork on plaster, wood on cement, etc). Contact-type adhesives do not exclusively designate neoprene adhesives, but also all other adhesives characterized by high instant adhesion.

Special features

Impact glue has a high adhesive capacity, and it is very resistant, it must be applied in thin layers. ''Impact adhesives'' are used in strong bonds with high shear-resistance like laminates, such as bonding

Formica ''Formica'' is a genus of ants of the family Formicidae, commonly known as wood ants, mound ants, thatching ants, and field ants. ''Formica'' is the type genus of the Formicidae, and of the subfamily Formicinae. The type species of genus ''For ...

to a wooden counter, and in footwear, as in attaching outsoles to uppers.

Natural rubber Rubber, also called India rubber, latex, Amazonian rubber, ''caucho'', or ''caoutchouc'', as initially produced, consists of polymers of the organic compound isoprene, with minor impurities of other organic compounds. Thailand, Malaysia, and ...

and polychloroprene (Neoprene) are the most commonly used contact adhesives. Both of these elastomers undergo strain crystallization. Contact adhesives must be applied to both surfaces and allowed some time to dry before the two surfaces are pushed together. Some contact adhesives require as long as 24 hours to dry before the surfaces are to be held together. Once the surfaces are pushed together, the bond forms very quickly.Definition of ''contact adhesive'' on About.com
/ref> It is usually not necessary to apply pressure for a long time, so there is less need for

clamps Clamp may refer to: Tools and devices *Brick clamp, an early method of baking bricks *Clamp (tool), a device or tool used to hold objects in a fixed relative position (many types listed) ** C-clamp ** C-clamp (stagecraft) **Riser clamp, a device ...

Inhalation

The neoprene glue is a well known inhalant, with effects that range from an alcohol-like

intoxication Intoxication — or poisoning, especially by an alcoholic or narcotic substance — may refer to: * Substance intoxication: ** Alcohol intoxication ** LSD intoxication ** Toxidrome ** Tobacco intoxication ** Cannabis intoxication ** Cocaine i ...

and intense euphoria to vivid hallucinations, depending on the substance and the dose. Some inhalant users are injured due to the harmful effects of the solvents or gases or due to other chemicals used in the products that they are inhaling. As with any recreational drug, users can be injured due to dangerous behavior while they are intoxicated, such as driving under the influence. In some cases, users have died from hypoxia (lack of oxygen),

pneumonia Pneumonia is an inflammatory condition of the lung primarily affecting the small air sacs known as alveoli. Symptoms typically include some combination of productive or dry cough, chest pain, fever, and difficulty breathing. The severi ...

cardiac failure Heart failure (HF), also known as congestive heart failure (CHF), is a syndrome, a group of signs and symptoms caused by an impairment of the heart's blood pumping function. Symptoms typically include shortness of breath, excessive fatigue, a ...

or arrest, or aspiration of vomit. Brain damage is typically seen with chronic long-term use of solvents as opposed to short-term exposure. Even though contact adhesives are legal, there have been legal actions taken in some jurisdictions to limit access by minors. While solvent glue is normally a legal product, a Scottish court has ruled that supplying glue to children is illegal if the store knows the children intend to abuse the glue. In the US, thirty-eight of 50 states have enacted laws making various inhalants unavailable to those under the age of 18, or making inhalant use illegal

Presentation

Neoprene adhesives exist in two forms, the so-called "liquid" form suitable for horizontal surfaces and the thixotropic "gel" intended for vertical or indoor installation (gel does not flow downwards). It may be packed in a classic glue tube (domestic use), in a pistol cartridge or in a can for large quantities.

Possible confusion about names

The neoprene adhesives discussed here should not be confused with the adhesives under the name "''neoprene-type glue''" that have certain characteristics in common with the former but do not have the same composition. The confusion related to the misleading name of these glues, as well as the difference in composition comparing "genuine" to these "imitation glues", can be very troublesome when joining certain materials. In fact, "neoprene-type glue" may be ineffective in places where "neoprene glue" would not give any gluing problem.

Precautions

Most neoprene glues contain volatile and flammable solvents, it is prudent to use them in a ventilated room and wear a mask that protects the nose and mouth from vapors.

Application

* Wet both surfaces with a spatula (thin, uniform layer of approximately 150 gramms per square meter). * If the support is porous, proceed with a double damping of the surface: the first layer will penetrate the support and the second will be ready to stick. * Drying: allow to dry until the solvents evaporate (15 to 20 min.). * When the adhesive film seems to no longer stick (at the touch of finger), perform the

assembly Assembly may refer to: Organisations and meetings * Deliberative assembly, a gathering of members who use parliamentary procedure for making decisions * General assembly, an official meeting of the members of an organization or of their representa ...

. Attention, the adhesion is immediate.

References

Bibliography

* Ebnesajjad, Sina (2010). "History of Adhesives". ''Handbook of Adhesives and Surface Preparation:Technology, Applications and Manufacturing''. Amsterdam:

Elsevier Elsevier () is a Dutch academic publishing company specializing in scientific, technical, and medical content. Its products include journals such as '' The Lancet'', ''Cell'', the ScienceDirect collection of electronic journals, '' Trends'', ...

. . * Kinloch, Anthony J. (1987). ''Adhesion and Adhesives: Science and Technology''. London:

Chapman and Hall Chapman & Hall is an imprint owned by CRC Press, originally founded as a British publishing house in London in the first half of the 19th century by Edward Chapman and William Hall. Chapman & Hall were publishers for Charles Dickens (from 1840 ...

. * * Mittal, K.L., A. Pizzi (2003). ''Handbook of Adhesive Technology''. New York: Marcel Dekker. *

External links

Educational portal on adhesives and sealants

3M's Adhesive & Tapes Classification

Database of adhesives for attaching different materials
{{Authority control Adhesives Visual arts materials