Plasticizer
Plasticisers are chemicals used in many plastic products such as PVC, rubber and polyurethane to give them flexibility and elasticity. They are particularly common in applications such as toys, food packaging and medical devices.
When bonding plastics, plasticisers can diffuse from the substrate into the adhesive or from the adhesive into the substrate. This can lead to embrittlement and even failure.
There are several types of plasticisers, including phthalates, benzophenones, bisphenol A (BPA) and alternative plasticisers such as citrates and adipates. However, some of these plasticisers are controversial as they can have health effects, especially with prolonged exposure and in high concentrations. Phthalates and BPA, for example, have been linked to hormonal disorders, infertility and other health problems.
For this reason, some plasticisers are restricted or banned in some applications. For example, the EU has banned the use of some phthalates in toys and baby products. There is also an increasing demand for alternative plasticisers that are considered safer and based on more sustainable raw materials.
