Glue stick
Glue sticks are solid and hard adhesives in twist or push-up tubes. Users can apply glue by holding the open tube to keep their fingers clean and rubbing the exposed stick against a surface.
Applications
Most glue sticks are designed to glue paper and card stock together, and are not as strong as some liquid-based variants. They can be used for craft and design, office use and at school. There are several varieties: permanent, washable, acid-free, non-toxic, solvent-free, and dyed (e.g. to see where the glue is being applied).
Brands
In 1969, the German company Henkel invented the glue stick after studying the "twist-up ease" and convenience of lipstick applicators. The product was released under the Pritt Stick brand. By 1971 the Pritt Stick was being sold in 38 countries, by 2001 in 121.[1] The first solvent-free, multipurpose glue stick that could be used for other materials (e.g. wood, glass and some plastics) was the "PowerPritt", which was put on the market in 2003.[2] There is also a "Pritt X", launched in 2010.
In the UK, the name "Pritt Stick" is often used as a generic term for any glue stick but it seems to be dying out more recently as a generic name.
Glue sticks are made under many brands and each may have different features to it. Various brands, such as Scotch, Elmer's, UHU, Kores, Giotto, UFO, Snopake, and Bostik U-Stick make glue sticks. Generic brands like M&G also manufacture glue sticks, utilising the twist action.
Sizes
Glue sticks can come in many sizes, the most common ones are 8g, 22g, 25g, 36g, and 43g.
Material
Known materials to be used for glue sticks are PVA or PVP.
Composition
Glue stick compositions are often proprietary and vary by manufacturer and type. The 3M product contains the following ingredients: [3]
| Name | % content | Purpose |
|---|---|---|
| Water | 40% | Evaporates to allow the glue to dry. |
| Acrylic polymer | 40% | Polymerizes to solidify dried glue. |
| Sodium stearate | 10% | This soap helps emulsify the acrylic, and lubricates the glue to apply smoothly. |
| Polyethylene glycol | 3% | Keeps dried glue somewhat moist and flexible. |
| Polyoxyethylene monooctylpphenyl ether | 2% | Emulsifier. |
| N-Vinylpyrrolidone monomer | 2% | Polymerizes as the glue dries. |
| 2-amino isobutanol | 2% | pH buffer, to neutralize acid. |
| Sodium hydroxide | 0.3% | Alkali, to keep stick pH above 10. |
The reportable composition of a Pritt Stick is as follows:[4]
| Name | EC number | CAS number | % content | Risk Statements |
|---|---|---|---|---|
| Caprolactam | 203-313-2 | 105-60-2 | 1 - 5% | Xn;R20/22 Xi;R36/37/38 |
| Hydrogen peroxide solution ...% | 231-765-0 | 7722-84-1 | < 1% | O;R8 C;R34 |
| Sodium hydroxide | 215-185-5 | 1310-73-2 | < 1% | C;R35 |
Other brands use, e.g., polyvinylpyrrolidone (PVP) as the glue substance.[citation needed]
References
- ^ "Pritt History". Archived from the original on 2013-03-18. Retrieved 2013-05-06.
- ^ "Pegamento Pritt para manualidades". Archived from the original on 9 October 2017. Retrieved 9 October 2017.
- ^ MSDS: 3M Brand Re-stickable Glue Stick
- ^ "Pritt Stick Safety Data Sheet" (PDF). Archived from the original (PDF) on 2016-03-04. Retrieved 2015-08-04.