Figure 1 It can be seen from the microscopic images that NanoBioMatters' new nanoclay is uniformly dispersed in PET, which significantly improves the barrier properties of PET bottles while maintaining the toughness and transparency of PET.
Some new barrier technologies that can extend the shelf life of products are gaining attention in the PET industry. These new barrier technologies include: New PET nanocomposites, which have broad market prospects for the application of single-layer beer bottles; new double-sided coating system that can apply plasma inside and outside PET preforms On both sides, it acts as a barrier; a new generation of long chain branched polyvinylidene fluoride (PVDF) can be used in extrusion blow molding.
Nanoparticle barrier material
For barrier bottle applications, nanocomposites have become a new option that can be especially blended with barrier materials such as MXD6 nylon for the production of multi-layer PET bottles.
A study at the Institute of Agrochemistry and Food Technology in Valencia, Spain, showed that small amounts (only 1% to 5%) of uniformly dispersed nanoparticles do not have any negative effect on the toughness and transparency of PET. The Institute has adopted a commercially-available organically modified montmorillonite nanoclay. This nanoadditive, called Nanoter 2000, is fully compliant with the standards of the United States Food and Drug Administration (FDA). It is provided by NanoBioMatters, Inc. of Valencia, Spain, and NanoBioMatters has an annual production of about 2.5 million kg in Valencia. The factory can produce about 24 grades of powders and master batches.
The average size of these nanoparticles is: 1 to 3 μm (3000 nm) thick and 250 to 1000 nm long. The experimental results show that nano-clay particles are uniformly dispersed in PET and have good interfacial adhesion. According to the Institute's scientist Jose Maria Lagaron (who is also the founder of NanoBioMatters), Nanoter 2000 nanoparticle-added PET is 2-6 times more barrier to water, oxygen and aroma than pure PET. At the same time, the glass transition temperature (Tg) was increased by 3°C and the crystallization performance was also improved.
Figure 2 NanoBioMatters nanoclay meets FDA food standard requirements. Just add 5% of content, can significantly reduce the oxygen permeability of PET bottles
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