The pioneering spirit in the presentation of exclusive and differentiated solutions is part of Contech's history. Highlighted for the development of a patented system of continuous conditioning of felts and wires, the company is nowadays quality reference, bringing significant results for the pulp and paper industries.



They make it easy the cooking liquor penetration in the fibers and the consequent removal of the extractive products. They promote improvements in the process and in cellulose quality.

They control foam formation in pulp production systems. They can also promote drainage enhancement by aiding the cellulose washing, reducing alkaline losses and optimizing the solids content sent for burning.

They act in the reduction of surface tension and viscosity, providing greater efficiency in the removal of free water from the cellulosic mass. They can be applied in both alkaline wash and dewatering machine.

They increase the efficiency of the suspended solids sedimentation, promoting a greater elimination of undesirable substances in the process. They also ensure improvements in causticizing process operations.

They promote the increase of the pie dry content and higher quality of the product sent to the lime kiln, which is fundamental for the process and the reduction of energy consumption.

They act in the dispersion of the pitch particles by means of surfactant and emulsifying agents. They also take action in the detackification of the contaminants avoiding agglomeration and facilitating the removal in the cellulose washing.

They prevent incrustations formation caused by carbonates, sulphates, oxalates, silicates, etc. and act in the complexation of undesirable metal ions present in the process, hindering the precipitation of inorganic salts.

They operate by complexing the metal polivalent ions of the environment aiming at preventing the harmful effects of these metals in the bleaching process of the cellulose pulp with hydrogen peroxide. They also help in the decrease of the consumption of chemicals used in bleaching.

They assist in the stabilization of the process and in the maintenance of the proper viscosity of the environment in order to achieve the maximum efficiency in the bleaching process. They may be used in substitution to the magnesium sulfate, bringing benefits as to their application and efficiency.


The water-based defoamers line presents excellent results and high efficiency both at the breaking of the foam formed in the machine water (knockdown) and in its persistence effects. It operates in the decrease and prevention of foam formation in papermaking systems and it can also be applied in effluents treatment.

They act in the size reduction of the contaminant particles and in the decrease of tackiness. They result in a cleaner process and in a higher quality pulp.


They act in the dispersion of the contaminants through solvency mechanisms and sequestrant power. They promote the reduction of the contaminants size to the colloidal scale thus allowing microfixant products act in their elimination process. They can be applied as repulping aids.

They act anchoring colloidal particles in order to microfix the contaminants in cellulose fibers and promote their elimination from the process. They promote improvement in the productive performance and in the final product quality.

They minimize consumption of the refining energy required in the process and are suitable for the treatment of all types of fibers, virgin or recycled.

It is effective in continuous cleaning for removal of fines, wet-strength resins, pitch, glues, stickies, carbonates and other contaminants found on felts and forming wires.

They are effective in the removal of resins, adhesives, and fines, loads and other contaminants impregnated during drying. They promote the reduction of steam consumption, increase of the wires lifespan and improvement of the final product quality.


It prevents contaminants adherence through the formation of a protection layer on the felts surface and minimizes the incidence of holes and defects on the paper sheet.

It produces a surface on the felt and wire that effectively repels the stickies and the pitch. The residual product heads to the parts of the system and operates in the reduction of adherence in blades, rolls and suction boxes. It results in increase of productivity and improvement of quality in the final product.

It prevents the accumulation of pitch and stickies. It shapes a protective surface on the rolls and suction boxes, preventing the adhering substances from depositing. It promotes process improvements.

They contribute with features like softness, resistance and final product absorption. They may be applied both on the humid part of the machine (wet-end) and on the paper surface (spray-on).

They act in the improvement of whitewater quality thus increasing the performance of the coagulation and/or flocculation stages in order to promote high efficiency of clarification and solids separation.

They act in the cleaning of pulping equipment, mixers, tanks, gutters and deflectors, fourdrinier table, piping and other equipment. They remove slime, waxes, pitch, calcium and barium deposits, fibers, loads, incrustations and other additives of the manufacturing process.

It helps in the humectation of solids and removes latex from the coater, the dandy roll and the steel structures, preserving the manufacturing equipment.

It cleanses the surface by high pressure, removing the dirt.

Supply of products developed aiming at high performance in the processes of:
• Control of foam with the application of water-based defoamers;
• Coagulation and/or flocculation aiming at high efficiency of clarification;
• Sludge thicknening;
• Control of filamental bacteria (in case of excessive growth).

They improve the dry resistance properties of the final product, allow the reduction and/or elimination of the use of starch, as well as compensate oscillations in the quality of the raw material in the process. That application promotes gains in weight reduction and productivity increase.

They operate improving the paper properties of wet-resistance, help in the retention and drainage process, promote cost reduction with chemicals and also a higher quality of the process and final product.

They act by absorbing the UV radiation and re-emitting blue light in order to compensate the yellow tone of the paper, thus increasing the quality of the final product as for whiteness and brightness.