The paper industry is constantly seeking ways to improve paper quality and reduce production costs. Silicon dioxide (silicon dioxide/white carbon black/silica) has become an important additive in papermaking due to its unique physical structure and chemical properties. Its nanoscale spherical particles, with a specific surface area often exceeding 200 m²/g, interact at the molecular level with paper fibers, enabling multifunctional enhancements. It can be used as a filler, coating pigment, and sizing agent in the papermaking process, effectively improving the paper’s strength, smoothness, and printability. Whether it is high-grade coated paper for printing or soft tissue paper for daily use, white carbon black can play a significant role in optimizing product performance.

Our precipitated white carbon black for coated paper undergoes a specialized hydrothermal synthesis process, ensuring an average particle size of 20-30nm. This precision engineering reduces the surface roughness of the coating to below 0.5μm, making the coated paper have a mirror-like smooth surface. During printing, the ink can be evenly absorbed, avoiding problems such as ink blurring and uneven color. A leading printing paper manufacturer in Japan conducted a six-month trial, adding 10% of our white carbon black to their coated paper coating formula. The results were remarkable: a 25% increase in the paper’s glossiness, a 15% improvement in print definition, and a 20% increase in the coating’s drying speed, significantly improving production efficiency. Moreover, the paper’s resistance to abrasion increased by 18%, extending its shelf life and enhancing its market competitiveness.

For tissue paper, softness and strength are two key indicators that consumers care about. Traditional tissue paper often has the problem of poor strength—easy to break when wet. Adding an appropriate amount of white carbon black to the tissue paper pulp can solve this problem. White carbon black’s large specific surface area allows it to form hydrogen bonds with cellulose fibers in the pulp, enhancing the bonding force between fibers. When the addition amount is 1-2%, the dry tensile strength of the tissue paper can be increased by 10%, and the wet tensile strength can be increased by 15%, while the softness of the tissue paper is not affected. This is because the ultra-fine particles of white carbon black can fill the gaps between fibers without forming a hard structure, ensuring the tissue paper remains soft and comfortable to use.

A European tissue paper brand integrated our white carbon black into their production line and carried out consumer blind tests. The results showed that 82% of consumers preferred the improved product, citing its enhanced strength and unchanged softness. As a result, their products received high praise from consumers, and sales increased by 30% within half a year. Further analysis revealed that the addition of white carbon black also improved the paper’s resistance to yellowing, maintaining its whiteness over a longer period.

In the production of specialty papers such as filter paper and electrical insulation paper, white carbon black’s unique properties are also fully utilized. Filter paper for water treatment needs to have good porosity and adsorption capacity. Adding fumed silica with a particle size of 5-10nm to the filter paper pulp can increase the paper’s porosity by 20%. The silica particles have a strong adsorption capacity for impurities such as heavy metal ions and organic matter in water, making the filter paper have a higher filtration efficiency, and the filtration accuracy can reach 0.1μm.

In a pilot project with a water purification company, our fumed silica was used in the production of filter paper. The results showed that the removal rate of heavy metal ions increased from 75% to 92%, and the removal rate of organic pollutants increased by 25%. The treated water quality met the strictest international drinking water standards.

Electrical insulation paper requires high dielectric strength and heat resistance. Adding high-purity precipitated white carbon black (SiO₂ content ≥99.9%) to the insulation paper pulp can improve the paper’s dielectric strength from 15kV/mm to 25kV/mm and increase the heat resistance grade from Class A (105°C) to Class B (130°C), making it suitable for use in high-voltage electrical equipment.

Our company collaborated with a transformer manufacturer to test the performance of insulation paper with our white carbon black. After 1000 hours of continuous operation at 120°C, the insulation paper maintained excellent electrical insulation performance, with no significant degradation in dielectric strength. This breakthrough allowed the manufacturer to develop a new generation of high-efficiency transformers, reducing energy losses by 12%.

Our company provides a variety of white carbon black products for the paper industry, including high-dispersible, high-purity, and ultra-fine grades. Each grade has been optimized for papermaking processes—for example, our coated paper-grade white carbon black has a low oil absorption value (≤150ml/100g), which can reduce the amount of binder used in the coating, lowering production costs; our tissue paper-grade white carbon black has good water solubility, ensuring even dispersion in the pulp. All our products meet the environmental protection requirements of the paper industry, with no heavy metals or harmful substances, and can be biodegradable in the natural environment, reducing environmental pollution.

In terms of logistics, we can provide bulk packaging (500kg/bag) and small packaging (25kg/bag) according to the customer’s needs, and cooperate with professional logistics companies to ensure that the products are delivered to the customer’s factory in a timely and safe manner. Our after-sales service team is available 24/7 to address any product-related issues, providing customers with a worry-free experience.