Colour Chronicle - June 2013
Colour Chronicle - June 2013
Colour Chronicle - June 2013
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PAPER<br />
Whether it’s a salad, an Asian wok dish, a<br />
classical kebab or a pizza to go: quick and<br />
tasty eat-out-of-hand snacks are now a<br />
normal part of a shopping expedition or<br />
the mid-day break. To save people getting<br />
greasy fingers or stains on their clothing,<br />
fast-food packaging is usually made of<br />
grease resistant paper. Such paper also has<br />
many other applications – for confectionery,<br />
pastries and frozen foods and even for animal<br />
food and cardboard tableware. Until now,<br />
naturally absorbent paper was usually made<br />
grease resistant by impregnating it with<br />
conventional additives consisting chemicals<br />
of long, very stable molecular chains.<br />
However, these substances are attracting<br />
growing criticism because of health and<br />
environmental concerns. This is why paper<br />
manufacturers have long been on the lookout<br />
for alternatives.<br />
“Clariant has now developed<br />
Cartaguard® KHI, a highly<br />
effective impregnating agent<br />
which thanks to its innovative<br />
formula is a big step forward in<br />
terms of safer use,” says<br />
DR. FRÉDÉRIC MABIRE, Global Product<br />
Line Manager for Paper Coating Chemicals<br />
at Clariant.<br />
Impregnation with<br />
totally PFOA-free<br />
Cartaguard® KHI makes<br />
paper grease resistant<br />
Conventional additives impregnation<br />
Conventional paper impregnation involves<br />
the use of a fluorinated substance consisting<br />
of long molecular chains. These chains are<br />
very stable and difficult to break. However,<br />
a small part of the chains may degrade to<br />
perfluorooctanoic acid (PFOA), a substance<br />
of health concern viewed critically by the<br />
experts.<br />
Now there is an impregnating agent which<br />
is both effective and safe: the innovative<br />
Cartaguard® KHI – developed by Clariant<br />
over five years of research activity.<br />
“Cartaguard® KHI is based on a<br />
completely different chemical<br />
compound, a C3-perfluoroalkyl<br />
ether polymer,” explains<br />
DR. FRÉDÉRIC MABIRE. “Based on a<br />
molecular substructure in which fluorinated<br />
alkyl chains consisting of only three carbon<br />
atoms are bridged by an oxygen atom,<br />
Cartaguard® KHI cannot break down to<br />
form PFOA.” Being safe for humans and the<br />
environment, Cartaguard® KHI has grease<br />
resistance properties which are close to<br />
conventional fluorine-based chemicals.<br />
Cartaguard® KHI: safer and more ecofriendly<br />
Cartaguard® KHI is already approved for<br />
food contact applications by the German<br />
Federal Institute for Risk Evaluation (BFR)<br />
and the US American regulatory agency<br />
FDA. It meets the stringent requirements<br />
for fast food as well as food service products.<br />
Furthermore, impregnated paper is more<br />
eco-friendly than plastic coated papers. The<br />
new impregnating agent also offers important<br />
benefits for paper manufacturers: it is easy to<br />
process because it generates hardly any foam<br />
during paper production and does not affect<br />
either the adhesive or printing properties of<br />
the paper.<br />
Following a test phase with several large<br />
customers, Cartaguard® KHI will be available<br />
in <strong>2013</strong> for fast food, frozen food and<br />
other food packaging. Customers enjoying<br />
a hamburger or pizza will not only be<br />
pleased about the unadulterated taste, but<br />
will also feel good about eating from safe,<br />
environmentally friendly packaging.<br />
14 COLOUR CHRONICLE__JUNE <strong>2013</strong>