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Nagase's joint development with subsidiary company Nagase
Chemicals has successfully resulted in a Master Batch compounding
new organic agent that displayed ability in anti-microbial,
anti-mold and anti-algae simultaneously. This owes to their
know-how of the sophisticated formulation in compounding the
two components - high safety powder and liquid, which was
once considered extremely difficult to formulate with emulsification
technology.
The new master batch branded "Denimas CP8" is a
transparent PVC pellet compounded by adding organic nitrogen-sulfur
liquid to zinc pyrithione powder. Zinc pyrithione has long
been used in skin-contacting ingredients for shampoos and
others, while organic nitrogen-sulfur in ingredients shows
no irritation to skin as well. Thus both are identified as
highly safe in results of various tests. The formulation also
contains a plasticizer DINP, with low skin irritation.
It is generally said that organic substance shows better
anti-mold property while inorganic substance shows superior
anti-microbial-fungicidal property when used in plastics.
Suppliers are marketing these agents promoting the advantageous
feature of each of these organic and inorganic substances.
On the other hand, there has been a strong demand in the industry
for a pre-made master batch that combines both the excellent
features for the purpose of better production efficiency.
Responding to this market need, both companies have, after
having identified the effectiveness of these two agents in
straight resins, decided to go into R&D for a new formulation.
However in the process they found the liquid and powder components
hard to mix and when compounded yielded a non-stable master
batch. Hence, the R&D team diligently seeks ways to apply
their emulsification technology and succeeded to breakthrough
the technical obstacles.
During a performance test, the cultured medium was put to
compare with set PVC sheets made with non-additive compounded
agents, it was found that the latter showed bacterial growth
all over the surface after 24 hours; whereas the cultured
medium shows no sign of any live staphylococcus aureus as
well as growth of mildew, algae, or chlorella such as malted
rice mildew, penicillium notatum, even after 4 weeks.
Even though the domestic market for flexible PVC is generally
shrinking due to environmental problem, but for application
such as consumer goods and sundries a firm steady demand still
exists because of cost consciousness as well as advantage
in moldability. Nagase find this a business opportunity and
plan to proactively grow sales in this market.
Nagase will first introduce this new master batch to the
market with PVC master batch produced by this technology,
and then target its application to flexible plastic moldings
such as wallpaper, water-contacting products, film for agriculture,
etc. Sales projection is estimated at 400 million to 500 million
yen by the end of three years. Next, they are considering
extending the sales to polyolefin market as they think there
may be a possibility for conversion.
(Source: Nagase & Co. Ltd)
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