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Lonza
Lonza antimicrobials are used to increase the useful life of plastic parts and have been proven effective against micro-organisms in a variety of applications at cost-effective use levels.

Lonza antimicrobials to preserve Elastomers, Rubbers and Polyolefins

High level of protection for Rubbers and Elastomers

Zinc Omadine® antimicrobial is effective against mold, fungi, and bacteria.

It offers a high level of protection to Rubbers and Elastomers through: In addition, Zinc Omadine® antimicrobial is available as a neat powder or a 48% aqueous dispersion for easier dispersion.

Elastomer protection against fungi with Zinc Omadine® antimicrobials

As shown in figure 1, the elastomer containing Zinc Omadine® antimicrobial powder presents efficacy at all use levels against fungi, whereas the negative control supported fungal growth:

Elastomer protection against fungi with Zinc OMADINE Antimicrobial
Figure 1: ASTM G 21 test evaluating the fungal protection of elastomers with
Zinc Omadine® Antimicrobial
(ZPT = Zinc Omadine® Antimicrobial)

> Based on this data, it is clear that use-levels as low as 250 ppm (only 0.025% active ingredient in the finished product) is an appropriate amount to provide fungal protection of elastomeric polymers, depending on the conditions.


Elastomer protection against bacteria with Zinc Omadine® antimicrobials

Zones of Inhibition are demonstrated for all bacteria tested at all levels in figure 2:

Elastomer protection against bacteria with Zinc OMADINE Antimicrobial

Figure 2: Zone of inhibition Test to evaluate the bacterial performance of ZINC Omadine® Antimicrobials
in an Elastomer (Escherichia coli*, Salmonella choleraesuis, Bacillus subtilis and Staphylococcus aureus)
* Does not apply in the US
(ZPT = Zinc Omadine® Antimicrobial)
> These results illustrate the efficiency of Zinc Omadine® antimicrobials to provide protection against a wide range of bacteria including: Escherichia coli*, Salmonella choleraesuis, Bacillus subtilis, Staphylococcus aureus.

(* Does not apply in the US)

Preservation of Polyolefins and other Polymers

Lonza Antimicrobials/biocides are based on a number of different antimicrobials and antifungals tailored to inhibit the microbial growth in a variety of applications including Polyolefins and silicone. This protection is achieved due to the broad spectrum effectiveness against microorganisms.

More than 6 log reduction of bacterial population with Zinc Omadine® antimicrobial in High Density PolyEthylene HDPE

Zinc Omadine® antimicrobial provides greater than 99% reduction of bacterial population in HDPE Substrate.

As illustrated by the test below, only 0.1% of Zinc Omadine® antimicrobial is required to obtain protection of HDPE over a 24 hour period:

  • The lowest level test, with only 0.1% Zinc Omadine® antimicrobial, provided 6 to 7 log reduction of bacterial population against both Gram negative (Klebsiella pneumoniae) and Gram positive (Staphylococcus aureus) bacteria.
  • A 6 log reduction = 99.9999% reduction of bacterial populations
  • A 7 log reduction = 99.99999% reduction of bacterial populations

The test (based on standard JIS Z2801) measures the bacteria population reduction on a substrate within 24 hours. Samples were placed in a Carver press set @ 140 - 150°C for 3 - 5 minutes then pressed at 2500 - 5000 lbs to form the thin films used in this test.

Lonza
Staphylococcus aureus ATCC 6538 gram (+)
  Bacterial viability after
Sample description 0 hours 24 hours  
  Rep1 Rep1 Rep2 Rep3 Average Log Reduction
Negative control 3.70E+05 6.80E+08 1.15E+08 7.00E+08 4.98E+08 Increase
Zinc Omadine® antimicrobial 0.1%   1.00E+02 1.00E+02 1.00E+02 1.00E+02 6.70
Zinc Omadine® antimicrobial 0.2%   1.00E+02 1.00E+02 1.00E+02 1.00E+02 6.70
Table 1: JIS Z2801 test (Staphylococcus aureus).
The Samples were prepared using a granular HDPE mix blended with Zinc Omadine® Antimicrobial
for a concentration of 0.1% and 0.2% by weight.


Lonza
Klebsiella pneumoniae ATCC 4352 gram (-)
  Bacterial viability after
Sample description 0 hours 24 hours  
  Rep1 Rep1 Rep2 Rep3 Average Log Reduction
Negative control 5.70E+05 1.87E+05 1.52E+09 9.30E+08 1.44E+09 Increase
Zinc Omadine® antimicrobial 0.1%   1.00E+02 1.00E+02 1.00E+02 1.00E+02 7.16
Zinc Omadine® antimicrobial 0.2%   1.00E+02 1.00E+02 1.00E+02 1.00E+02 7.16
Table 2: JIS Z2801 test (Klebsiella pneumoniae)
The Samples were prepared using a granular HDPE mix blended with Zinc Omadine® Antimicrobial
for a concentration of 0.1% and 0.2% by weight.


Zinc Omadine® Antimicrobial effective in Polyolefins

Figure 3: Zone of Inhibition - Tests made on Polyolefin plastic parts

Zinc Omadine® Antimicrobial is Effective in Polyolefins.

Elastomer protection against bacteria with Zinc OMADINE Antimicrobial

Figure 4: Zone of inhibition Test to evaluate the bacterial performance of ZINC Omadine® Antimicrobials
in an Elastomer (Escherichia coli*, Salmonella choleraesuis, Bacillus subtilis and Staphylococcus aureus)
* Does not apply in the US
(ZPT = Zinc Omadine® Antimicrobial)

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Case Studies from Antimicrobials and Biocides Solutions for Plastics

Superior Preservation of Vinyl Plastisol-based Outdoor Furniture with Vanquish® 100 Antimicrobial vs. OBPA and DCOIT

This case study shows why VANQUISH® 100 Antimicrobial provide better protection (than DCOIT and OBPA) of PVC against fungi after weathering and how it successfully passed the AFNOR X 41-514 test.

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Excellent Antifungal Alternative to Tributyltin for Polyurethane Foam: Meet Specifications of FORD™ Motor Company with VANQUISH® 100 Antimicrobial!

This case study shows some of the results obtained by VANQUISH® 100 Antimicrobial following the specifications of Ford Motor Company for PU Foams protection against fungi.

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Replacement of Triclosan or Chitosan by Zinc OMADINE™ Dispersion Antimicrobial in Carpet Backing Application

Zinc OMADINE™ Dispersion Antimicrobial has proven to be an excellent alternative to standard biocides by offering superior broad spectrum protection of the polymer matrix.

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Solve your OBPA Replacement Challenge and Protect Flexible Vinyl Flooring from Microbial Growth

The solution for this challenge is a cost-efficient antimicrobial, which prevents fungal, bacterial and even algal activity on PVC. VANQUISH® SL-10 antimicrobial is a replacement solution to OBPA and offers different benefits.

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VANQUISH® 100 Antimicrobial: the Antimicrobial and Antifungal Additive for the preservation of PVC in High UV Environments

VANQUISH® 100 Antimicrobial has proven to be an excellent alternative to standard antimicrobials by offering superior protection to fungal growth on the polymer matrix under high UV exposure when compared to other antimicrobials.

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Downloads from Antimicrobials and Biocides Solutions for Plastics

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