papermaking defoamer is a dedicated chemical additive developed to resolve foam‑related troubles in papermaking production processes. It is mainly compounded of special silicone‑polyether components and high‑performance dispersing auxiliaries. Featuring stable chemical properties and non‑toxic formula, it brings no adverse impact to human bodies.

Tailored for foam‑control requirements of different papermaking sections, papermaking defoamer delivers outstanding defoaming and foam‑inhibiting performance. It will not trigger undesirable chemical reactions with other process additives. It will not change the colour of pulp slurry or finished paper, nor compromise paper strength and other key product indexes. For these reasons, it has been widely adopted in multiple working sections of the pulp and paper industry.

Main Application Scenarios of Papermaking Defoamer

Papermaking defoamer fits for a broad range of working conditions: defoaming & degassing for paper coating, sizing treatment, coated paper, printing picture paper, de‑inking washing process, polymer‑based paper coating system, stock slurry defoaming, surface size‑press procedure, wet‑end of paper machine, and degassing & foam elimination throughout paper manufacturing workflow.

In general papermaking production, two critical process segments rely heavily on defoamer: pulp washing and paper‑making (sheet‑forming).

During the pulp‑washing stage, excessive foam will block normal procedures such as bleaching, cleaning and material conveying, which drags down overall production efficiency. In this phase, papermaking defoamer focuses on rapid foam breaking. It eliminates foaming substances like fatty‑acid soap inside pulp. Thanks to excellent water‑solubility, it disperses evenly and quickly within pulp liquor, cuts foam volume effectively and improves production throughput.

While in the paper‑making (sheet‑forming) stage, its core function shifts to foam suppression. Uncontrolled foam will cause poor sheet formation, pinhole defects and frequent paper break‑offs. At this stage, the defoamer penetrates into paper fibres, removes micro‑bubbles trapped among fibres and dissolves entrained air inside slurry. It forms elastic protective film on liquid surface so as to restrain new‑foam generation for long periods, and guarantees attractive appearance and stable quality of final paper products.

Key Features of Pulp & Papermaking Defoamer

• Good water solubility, easy dispersion in water for convenient field operation

• Works efficiently across wide pH value and temperature ranges

• Powerful defoaming and foam‑suppressing capacity with low addition dosage

• Removes micro‑foam thoroughly without damaging appearance and quality of raw materials

• Good compatibility with various chemical auxiliaries; helps defoaming performance and restrains foam re‑generation

If you are looking for reliable domestic papermaking defoamer manufacturers for sample test, technical support or bulk supply, welcome to contact our technical team for tailored formulation advice and process solution matching your actual papermaking conditions.