For many people, the first of September is the first day of the 2014-2015 academic year.
On your way to school, BPA-based applications probably don’t come to mind, but your school day would be very different without them. BPA is a key component to two types of plastic, namely polycarbonate and epoxy resins, and BPA applications add value throughout our daily activities.
The glasses that you wear to see the chalkboard use shatter-resistant polycarbonate lenses, which are also safer in case of playground incidents.
One day soon you may be riding to school in a car with polycarbonate windows, which manufacturers may soon use because polycarbonate windows are shatter-resistant and lightweight, and therefore reduce the car’s weight so that it consumes less fuel. If you take the bus, it is possible that the bus shelter you wait at uses polycarbonate sheets to protect you from the wind and rain.
In your classroom, the lights may be powered with electricity generated by wind turbines. Many turbines blades are made with BPA-based epoxy resins; materials which enable wind turbine blades to be lighter without sacrificing durability.
We hope that students today study chemistry and discover this essential science. One day, they may use their education to contribute to the improvement of our living and working conditions with their own chemistry-based inventions.…
Last week saw the first football matches of the season in many European countries. And this reminded us of another application of BPA-based polycarbonate in architecture, seen at this summer’s World Cup.
The use of translucent polycarbonate as a material between the aluminium roof panels of the Arena das Duna stadium in Natal, Brazil formed a structure that resembled the petals of a flower when viewed from above.
Populous, the architecture firm that designed the arena, notes that the design allows for more light to come through the stadium. The use of BPA-based polycarbonate to form a translucent shatter resistant material allowed the stadium to have its essential characteristic and striking visual form.
The stadium is now used by the América Futebol Clube de Natal.…
When Stanley Siu designed the Rising Moon Pavilion for the 2013 Hong Kong Mid-Autumn Festival, he told Design Interviews that the pavilion was “promoting the message of environmental protection.”
Siu and his team designed a pavilion that used the imagery of the moon and the Chinese tradition of paper lanterns, created in a 10 meter tall by 20 meter diameter hemisphere constructed of 4,848 5-gallon bottles and 2,300 1.5-liter polycarbonate bottles. Siu highlighted that the bottles were “recyclable and reusable” due to their material properties. The bottles provided an ideal material which offered no compromise for his concept.
An essential ingredient in the manufacturing of polycarbonate, BPA enables the material to become temperature and shock resistant, clear, and able to endure bending and moulding. Polycarbonate is a great, versatile material, as demonstrated by its use in the Rising Moon Pavilion.…
Si vous visitez ce blog, vous êtes peut-être à la recherche d’informations sur la récente étude de l’INRA associant l’exposition au bisphénol A à l’apparition de possibles allergies.
Les titres alarmistes de la presse et des réseaux sociaux à propos de cette nouvelle étude ont suscité une vague de réactions en France et à l’étranger. Il est utile de rappeler ici que, comme mentionné à la fin d’un article à ce propos dans Le Figaro, l’un des chercheurs a déclaré que les résultats obtenus sur un animal d’essai ne se traduisent pas directement à l’homme.
Bien sûr, un article mesuré, basé sur les faits, ne fera que rarement le buzz sur Internet; l’histoire racontée par la plupart des titres des médias – et en l’occurrence par le communiqué de presse de l’INRA – était très différente.
Revenons aux fondements de ce que nous savons. Les produits à base de BPA ont été confirmés maintes et maintes fois comme sûrs pour la consommation humaine. Au cours des dernières années, au moins 20 évaluations majeures ont été entreprises par des autorités indépendantes à travers le monde sur le BPA; toutes ont trouvé que le BPA ne présentait pas de risque pour la santé humaine. En outre, les autorités de réglementation examinent la sécurité du BPA sur une base continue. Le poids des preuves scientifiques fournies …
The BPA Coalition occasionally receives questions from students regarding bisphenol-A. We wish we did more often, as our mission is to have an open and constructive dialogue about BPA.
We took advantage of the summer break to make a compilation of the questions we received in the past few months. We hope that the answers proved useful for our correspondents, and that they will also provide you with relevant information on BPA.
Q: Are you not at all concerned about the dangers of BPA in plastics that have contact with food?
We are extremely concerned about the safety of materials entering in contact with food—it is of utmost importance for the health and safety of consumers. Our members, who produce BPA and many other chemicals, are always extremely attentive to ensuring the safety of materials and substances used for food contact applications.
To determine the safety of a substance like BPA for food contact purposes, scientists and regulators look at two elements:
- the “dangers” (hazard) of the substance by itself
- the exposure consumers are facing when using the product.
This enables them to determine the degree of risk attached to the use of the substance for food contact purposes, and in function of that, to possibly set up regulatory measures to either limit or forbid the use of a given substance.
Here’s a great video explaining the difference between hazard (danger) and risk.
In the case …