Boost Paper Production Efficiency & Quality with Advanced Biocides and Defoamers

In modern papermaking, microbial contamination and foam generation remain two major operational challenges. With higher efficiency demands and increasing water loop closure, microorganisms and surface-active substances accumulate more rapidly — making biocides and defoamers essential additives for stable and high-quality paper production.

We provide reliable, cost-effective, and eco-friendly solutions for microbial control and foam management in wet-end, white water, and paper machine circulation systems.

🔹Challenges from Microbial Contamination

Slime formation causing sheet breaks and wire blockages
Sheet defects: spots, pinholes, odor issues
White water deterioration, corrosion risk rises
Higher chemical and energy consumption
More downtime from frequent cleaning

Effective and continuous microbial control is key to keeping the paper machine running smoothly.

Our Biocide Solutions for Pulp & Paper

We offer a wide range of professional biocides tailored to system conditions such as temperature, pH, microorganism type, and compatibility:

Biocide Type	Key Features	Typical Application
Non-oxidizing biocides (e.g., PHMB, THPS, CMIT/MIT)	Long-lasting, broad-spectrum, highly compatible	Wet-end continuous dosing, pulp tanks, white water
Oxidizing biocides (e.g., peroxide-based systems)	Fast action, strong cleaning ability	Shock dosing for system sanitation
Quick-kill biocides (e.g., DBNPA)	Rapid penetration against bacteria/fungi	Spot treatment during slime bursts

Benefits

Broad antimicrobial spectrum
Low dosage & cost-efficient
Compatible with retention aids, colorants, and sizing agents
Designed to meet modern environmental regulations

Foam Problems in Papermaking

Foam caused by residual surfactants, latex, starch, and microbial metabolites leads to:

Pinholes, cracks, uneven sheet formation
Lower dewatering efficiency, reduced machine speed
Air entrainment affecting stock stability
More cleaning and maintenance needs

High-Performance Defoamer Solutions

We supply silicone-based, polyether, and mineral oil defoamer systems to meet specific wet-end and coating requirements:

Product Type	Advantages	Recommended Use
Silicone defoamers	Instant knockdown, strong durability	Wet-end, thick stock, white water loops
Polyether defoamers	Excellent antifoam stability, coating-friendly	Coating, sizing, starch systems
Mineral oil defoamers	Best cost-performance ratio	Continuous dosing in neutral/alkaline systems

👉 Explore papermaking defoamer portfolio here: Defoamer manufacturer-Nanjing Invelychem Co., Ltd

Greener, More Efficient Papermaking

By selecting our biocides and defoamers, paper mills can achieve:

Higher production efficiency
Reduced downtime and operational expense
Improved sheet appearance and mechanical properties
Compliance with environmental regulations

Our team provides full technical support:

✔ System evaluation
✔ Dosing strategy design
✔ On-site testing and optimization
✔ Strong supply reliability

Let’s Work Together

If you are looking for a trusted supplier of biocides and defoamers for pulp & paper, we are here to help — from product selection to long-term technical support.

Contact us today to learn more and request samples.
We look forward to helping you optimize your papermaking performance!