Pulp & Paper Defoamer Manufacturer | INVINO®
Foam remains a persistent challenge across continuous pulp manufacturing and paper machine loops. Without structured deaeration and foam control solutions, excessive gas entrainment impairs sheet formation, increases chemical consolidation costs, and disrupts automated production lines.
Pulp Mill & Wet-End Application Requirements
- Injection Point: Feedstocks must be introduced directly into high-turbulence process zones (e.g., fan pump inlet) to secure optimal emulsion dispersion boundaries.
- Continuous Dosing: Verification via positive displacement diaphragm metering pumps with ±1% accuracy baseline is required to stabilize chemical parts-per-million (PPM) concentrations.
- Temperature Monitoring: Real-time audit of white water loop parameters (45-60°C) ensures that selected polymers operate seamlessly relative to their formulation cloud point thresholds.
- Shear Stability: Synthetic structures must withstand high-speed centrifugal cleaners and pressure screens without experiencing phase separation or oil slicking hazards.
1. Drainage Impairment
Entrained microscopic air bubbles inside the machine headbox retard the dewatering acceleration curve across the forming wire, limiting maximum machine speeds and elevating steam consumption parameters within dryer sections.
2. Surface Defects (Pinholes)
Persistent macro-foam accumulation at the air-fluid interface yields pinholes, craters, and fish-eyes on the finished paper sheet, resulting in rejected reels and compromised coating distribution uniformity.
3. Chemical Carryover
Inefficient brown stock washing operations induce black liquor organic carryover boundaries, multiplying downstream bleaching chemical consumption values and elevating chemical oxygen demand (COD) baselines in plant effluent streams.
Defoamer Selection Guide: From Pulp Mill to Paper Machine
| Process Stage | Foam / Air Challenge | Candidate INVINO® Grade | Mill Trial Decision Criteria |
|---|---|---|---|
| Pulp washing, screening & black liquor | Alkali, lignin surfactants and carryover | INVINO-6930 — silicone emulsion | Confirm alkali tolerance, knockdown, persistence, deposits and downstream compatibility under representative liquor conditions. |
| Paper-machine wet end & white water | Surface foam, entrained air and drainage variability | INVINO-5045 / INVINO-5060 — fatty alcohol emulsions | Compare air content, drainage, retention, sizing results and deposit tendency against the current treatment. |
| High-speed closed white-water loop | Persistent micro-air under shear and higher temperature | INVINO-8062 — polyether | Use the current TDS range to shortlist; validate temperature, shear, degassing, dosage response and runnability. |
| Coating kitchen & size press | Foam that can contribute to coating defects | INVINO-3000 — hydrocarbon / mineral-oil type | Evaluate foam, rheology, leveling, surface defects, oil-spot risk and downstream print requirements. |
| Surface sizing | Foam and film-uniformity variation | INVINO-8082 — polyether ester compound | Screen starch and additive compatibility, foam control, deposits, film uniformity and sheet performance before scale-up. |
Technical Documents & Compliance
Start with the one-page product overview, then request the current grade-level TDS, SDS or compliance package for your intended application and destination market.
Pulp & Paper Product Overview
Review candidates for pulp washing, wet end, white water, coating and surface sizing. Use the overview for initial screening, then confirm the grade with current technical documents and a controlled mill trial.
Request Current Grade Documents
Choose a process stage and grade. We check the document revision, production site and destination market before sending the applicable files.
| Process stage | Candidate grades | Product family / position | Documents by request | Action |
|---|---|---|---|---|
| Pulp washing and black liquor | INVINO-6930 | Silicone emulsion | TDS, SDS, compliance package | Request documents |
| Wet end and white water | INVINO-5045, INVINO-5060 | Conventional fatty-alcohol references | TDS, SDS, compliance package | Request documents |
| Wet end and white water | INVINO-5800 | New modified fatty-alcohol grade for enhanced deaeration screening | TDS, SDS, compliance package | Request documents |
| High-speed closed white-water loop | INVINO-8062 | Polyether | TDS, SDS, compliance package | Request documents |
| Coating kitchen | INVINO-3000 | Hydrocarbon / mineral-oil type | Current documents after application review | Request documents |
| Surface sizing | INVINO-8082, INVINO-8082A | Polyether-ester grades | Current documents after grade review | Request documents |
INVINO-5800: Compare air content, drainage, sizing response and deposit tendency against the current fatty-alcohol treatment under representative white-water conditions.
INVINO-8082 / 8082A: Review starch formulation, temperature and additive compatibility before a controlled mill trial.
Request Pulp & Paper TDS / SDS
Tell us the grade, document type and destination market. We will verify the current revision and send the applicable files by email. SDS and compliance packages are checked against the product grade, production site and destination requirements. A Certificate of Analysis is supplied only for a specific production lot.
Foam Control: From Pulp Mill to Paper Machine
The Challenge: Black liquor macro-foam generated by isolated residual lignin fractions and high alkalinity boundaries during washing lines.
The Impact: Impairs brown stock washing acceleration metrics, yielding extensive chemical carryover loops.
The Solution: Modified organosilicone structural compounds configured stable under high thermal and alkaline thresholds.
The Challenge: Entrained gas phase anomalies and continuous surface foam inside closed loop white water systems.
The Impact: Retards wire drainage velocity, creating sheet pinholes and recurring machine breaks.
The Solution: Non-silicone fatty alcohol or block polyether blends optimizing prompt slurry degassing without creating pitch spots.
The Challenge: Micro-bubble generation during intensive pigment blending and modified starch preparation stages.
The Impact: Induces visible surface craters and fisheyes across the finished coated paper web.
The Solution: Formulated mineral oil structures calibrated for uniform coating leveling and sheet flatness.
Application Scenarios for Mill Trial Planning
Application Scenario 1: INVINO-5045 Fatty Alcohol Defoamer for Papermaking (White Water)
Background: A high-capacity paper packaging mill required reliable deaeration to optimize web sheet drainage in the headbox and forming fabric.
Challenge: Existing competitor batches failed to hold foam control during high-speed machine runs.
Solution: The facility switched to INVINO-5045 non-silicone fatty alcohol emulsion, achieving stable gas release at high machine speeds with consistent dosing.
- Improved web drainage and paper sheet uniformity.
- Fewer manual maintenance stops thanks to stable foam suppression.
- Lower cost per ton through reduced dosing rates (PPM).
Application Scenario 2: INVINO-8062 Polyether Defoamer for High-Temperature White Water Systems
Background: A linerboard mill faced heavy foam in its closed-loop white water system when temperatures rose above 50°C.
Challenge: Standard competitor antifoams broke down at high temperature, causing phase separation and oil defects on the paper web.
Solution: The mill deployed INVINO-8062, a 100% active block polyether deaerator that stayed stable up to 60°C.
- Suppressed micro-bubbles in high-temperature white water circuits.
- Improved white water recovery loop consistency.
- Eliminated phase separation, holding precise dosage.
Mill Trial Warning: Diagnose Pitch and Deposit Risk
Pitch and deposit formation can involve resin carryover, emulsion stability, shear, salts, dosage and the addition point. Establish a documented baseline, screen candidates at controlled increments, inspect fabrics and deposits, and verify sizing, retention and drainage before scale-up.
Pulp & Paper Defoaming: Technical FAQ
Q1: Does the defoamer interfere with paper sizing (AKD/ASA) efficiency?
A: Compatibility depends on product chemistry, dosage, addition order and the mill's sizing and retention program. Screen INVINO-5045 or other candidates against an untreated baseline, then monitor Cobb or sizing results, retention, drainage and deposits before scale-up.
Q2: Why can foam control change when white water temperature rises?
A: Temperature can change emulsion stability, solubility and the behavior of wet-end surfactants. Review the current TDS temperature range and compare candidates such as INVINO-8062 under representative temperature, shear and white-water conditions rather than switching on temperature alone.
Q3: How should a mill investigate pitch spots or oil spots on the felt?
A: Pitch and oil spots can have multiple causes, including emulsion stability, resin carryover, shear, salts, dosage and addition point. Use controlled comparisons, inspect deposits and fabrics, and verify compatibility before changing chemistry or scaling dosage.
Q4: Where should a wet-end defoamer be dosed?
A: Candidate points include the fan-pump suction, wire pit or white-water collection point. The best point depends on mixing, residence time and where air enters the system, so confirm dispersion, dosage response and downstream effects in a controlled mill trial.
Sample & Lab Screening Options
- Evaluation Samples — availability, quantity, courier account and freight terms are confirmed for each request.
- Foaming-liquid screening — lab scope, sample handling and candidate recommendations are confirmed after application review.
- Packaging and MOQ — available pack sizes, sample quantity and commercial MOQ are confirmed in the quotation.
- Technical response — timing for grade screening, documentation and quotation depends on the application data provided.
Quality Documentation & Supply Review
REACH SVHC-241, PAHs, phthalates and heavy-metal compliance reports available on request. Selected by mills according to furnish, water chemistry and process conditions
Technical Guides for Pulp & Paper Foam Control
For detailed operating guidance, review our black liquor defoamer guide for kraft pulping and our comparison of silicone versus fatty alcohol defoamers for paper mills.
Request Your Papermaking Defoamer Solution
Standard Protocol for Industrial Sample Verification and Dispatch
System Parameter Submission
Provide your slurry fiber type, machine wire speed, white water temperature, and pH so we can match the right grade.
Laboratory Formula Evaluation
Our pulp & paper lab reviews your profile and reviews your profile and prepares a target grade recommendation, countertype sheet and quotation for technical follow-up.
Physical Sample Dispatch
Sample availability, quantity, courier method and freight terms are confirmed before dispatch for a controlled mill trial.
