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WS PM-7139 is a non-ionic aqueous, antifoam silicon emulsion based on polydimethylsiloxane oil.

WS PM-7139 is highly recommended for the prevention control or elimination of foam in pulp and paper applications.

Its effectiveness is not affected by pH, and it is equally efficient in alkaline as in acidic systems.

WS PM-7139 provides excellent foam control at temperatures up to 95^oC with an improvement in performance as temperature increases.

It has excellent deaeration capabilities and also provides excellent performance in effluent systems and reservoirs.

• Economical silicon-based defoamer
• FDA authorized components
• VOC – free
• Readily disperses in process stream
• Minimizes surface foam and entrained air
• Effective paper mill antifoam
• Effective over a wide pH range

WS PM-7139 should be fed neat (undiluted) directly from the shipping container. Any suitable high viscosity, positive displacement pump can be used. If separation occurs during storage, the product can be easily mixed using a drum mixer.

Proper treatment levels for WS PM-7139 depend on many factors, such as severity of the problem, the type of furnish, machine speed, and other conditions particular to a given application. For most applications, the feed rate ranges between 0.125 and 1.0 kg/ton (0.25 and 2.0 lbs/ton) of paper produced. Specific feedpoints and feed rates will be established with the assistance of our local representative.

WS-PM-7139 is in compliance with requirements of the U.S. Food and Drug Administration for use in materials contacting food as specified in the Code of Federal Regulations, Title 21, subject to the limitations and requirements of each regulation under the following Section(s):

• 176.170 (components of paper and paperboard in contact with aqueous and fatty foods).

• 176.210 (defoaming agent used in the manufacture of paper and paperboard).

The ingredient(s) in this product is listed under 21 CFR 176.210 (antifoams).

Read and understand the Material Safety Data Sheet (MSDS) before using this product.

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