Project Description

Pulp & Paper Defoamer Manufacturer: Pulp Mill & Wet End Solutions

Foam is a persistent challenge across the pulp & paper industry. Without effective defoamers and foam control solutions, excessive foam affects paper quality, increases chemical consumption, and disrupts production efficiency.

Typical challenges include:

  • Pulping & Washing: Entrained air and foam during pulping, washing, and bleaching, reducing washing efficiency and increasing chemical carryover.
  • Papermaking (White Water): Excessive foam in headbox and white water systems, leading to sheet defects, breaks, and poor formation.
  • Coating Kitchen: Foam during pigment and binder preparation, leading to coating defects like pinholes and craters.
  • Surface Sizing: Foam affecting film uniformity and penetration, reducing surface strength.

INVINO offers tailored foam control solutions using fatty alcohol, polyether, and silicone defoamers, ensuring reliable performance across pulping, papermaking, coating, surface sizing, and wastewater treatment.

Defoamer application in paper machine wet end and coating process
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Defoamer Selection Guide: From Pulp Mill to Paper Machine

Process Stage Foam Challenge Recommended INVINO® Grade
Pulp Mill (Black Liquor)
Washing & Screening 		High Alkali & Lignin INVINO-6930 (Silicone Emulsion)
High solid content, stable in black liquor.
Paper Machine (Wet End)
White Water System 		Degassing & Drainage INVINO-5045 (40-50°C)
INVINO-5060 (45-60°C)
Fatty Alcohol type. Zero impact on sizing.
High-Speed Paper Machine
Closed Loop Systems 		Stubborn Micro-foam INVINO-8061 / 8062 (100% Active)
Polyether/Non-silicone. High concentration.
Paper Coating
Sizing Press / Kitchen 		Surface Defects (Fisheyes) INVINO-3000 (99% Active)
Mineral Oil based. Excellent leveling.
Surface Sizing Film Uniformity INVINO-8082 (100% Active)
Effluent Treatment Discharge Compliance INVINO-620S (Modified Silicone)

Foam Control Solutions Across the Pulp & Paper Process

Our defoamers are engineered for specific challenges encountered at various stages of pulp and paper manufacturing. Find your specific solution below.

Pulp Mill Operations (Pulping, Washing, Bleaching)

Description: Effectively control stubborn foam generated during black liquor processing, bleaching stages, and pulp washing. We provide stable defoamers suitable for high temperature and high alkalinity environments, ensuring washing efficiency and fiber quality.

[Contact Us for Pulp Mill Solutions]

Papermaking Wet-End & White Water Systems

Description: Addresses foam issues in the papermaking wet-end (forming section, press section) and white water circulation systems. We offer high-efficiency defoamers, including  high-performance fatty alcohol-based defoamers, to improve sheet formation, reduce paper breaks, and enhance operational efficiency.

[View Fatty Alcohol Defoamer Solutions]

Paper Coating & Sizing

Description: Specifically resolves foam generated during coating preparation (coating kitchen) and surface sizing processes. Prevents coating defects such as pinholes and fisheyes, ensuring paper surface quality and smoothness.

[View Paper Coating Defoamer Solutions]

Key Advantages of Choosing INVINO

Comprehensive coverage

From pulping, papermaking, coating, surface sizing to wastewater treatment, INVINO delivers pulp & paper defoamer solutions that keep foam under control across the entire process.

Technical expertise

Industry experience with on-site trials, process audits, and tailored recommendations to solve papermaking foam control challenges efficiently.

Proven performance

Improve sheet formation and stabilize white water systems with reliable results trusted by leading paper mills worldwide.

Sustainability focus

Eco-friendly defoamers that support effluent compliance and reduce environmental footprint without sacrificing production efficiency.

Customer Success Stories with INVINO Pulp & Paper Defoamer

Case Study 1: INVINO-5045 Fatty Alcohol Defoamer for Papermaking (White Water)

Background: A leading paper mill required a reliable defoamer to improve sheet formation and paper quality in the headbox and forming section.

Challenge: The mill had used a competitor’s product but needed a defoamer that could maintain performance during extended high-speed production runs.

Solution: After evaluating various options, the mill selected INVINO-5045, a fatty alcohol-based defoamer. It provided consistent foam control even at higher speeds, delivering reliable long-term performance.

  • ✔ Improved sheet formation and paper quality
  • ✔ Reduced maintenance costs through efficient foam control
  • ✔ Enhanced cost-effectiveness with reduced defoamer usage
  • ✔ Reliable performance across challenging operational conditions

Case Study 2: INVINO-8061 Polyether Defoamer for High-Temperature White Water Systems

Background: A major paper mill experienced foam challenges in its white water system, particularly when temperatures exceeded 50°C.

Challenge: The competitor’s defoamer could not deliver stable performance under high-temperature conditions, leading to production inconsistencies.

Solution: The mill switched to INVINO-8061, a polyether-based defoamer designed for high-temperature applications. It provided stable foam suppression up to 60°C, ensuring reliable operation.

  • ✔ Superior foam control in high-temperature white water systems (up to 60°C)
  • ✔ Increased water recovery efficiency and consistency in paper quality
  • ✔ Reduced defoamer usage while maintaining stable foam control
  • ✔ Better cost efficiency with minimal reapplication required

Frequently Asked Questions (FAQ)

Q: Can your defoamer improve drainage in Brown Stock Washing (BSW)?
Yes. In pulp mills, foam entraps air and reduces washing efficiency. Our silicone emulsions for black liquor are designed not just to break surface foam, but to actively facilitate **drainage**. This results in cleaner pulp, lower soda loss, and reduced energy consumption in the evaporation plant.
Q: Does it handle "entrained air" (microbubbles) in the Wet End?
Absolutely. Surface foam is only visible trouble; entrained air is the hidden enemy that causes pinholes and poor formation. Our **Fatty Alcohol** and **Polyether** series function as powerful **deaerators**, removing internal microbubbles to improve sheet formation and allow for higher machine speeds.
Q: Will the defoamer cause deposits or "pitch spots" on the felt/wire?
No. We strictly control the particle size and stability of our emulsions. For the paper machine (wet end), we typically recommend our **Zero-Silicone (Fatty Alcohol)** series to completely eliminate the risk of silicone spots, felt clogging, or sticky deposits on the wire.
Q: Does it interfere with sizing agents like AKD or ASA?
Compatibility is a key priority. Our wet-end defoamers are chemically screened to ensure they do not competitively adsorb onto the fiber or disrupt the sizing emulsion. They maintain excellent sizing degrees (Cobb value) while effectively controlling foam in white water systems.
Q: Are your products FDA compliant for food-contact paper?
Yes. We offer specific grades that comply with **FDA 21 CFR 176.170** and **176.180** (Components of paper and paperboard in contact with dry/aqueous/fatty foods). Please contact our regulatory team for the specific Compliance Declaration (TDS/MSDS) for your grade.


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