Cationic starch: strength and retention
Positively charged starch bonds to negatively charged fibres and fillers: higher dry strength, better retention of fines and fillers, faster drainage.
10 · Industrial
Paper & textile
Strength, retention and a printable surface, from the wet end to the coater
Starch works at three points in papermaking. At the wet end, cationic and amphoteric starches bond to fibres and fillers to raise paper strength and retention. At the size press, oxidized and acid-treated starches seal the surface for strength and printability. In the coater, starch binds pigments and controls coating rheology. Gaofeng also supplies starches for textile warp sizing and for printing and dyeing.
Request sample & data sheetTypical products
- Wet-end strength and retention (cationic starch)
- Recycled fibre and closed water systems (amphoteric starch)
- Surface sizing for paper and board
- Coating binders for coated paper and board
- Textile warp sizing
- Printing and dyeing auxiliaries
Recommended starch families
What the starch has to do
Amphoteric starch: works in difficult water
With both cationic and anionic groups, it keeps working at high conductivity and in recycled-fibre or closed-loop systems, where plain cationic starch loses efficiency.
Surface sizing
Seals the sheet: higher surface strength and stiffness, less linting and dusting, better printability and ink holdout.
Coating binder
Binds pigment particles, controls coating viscosity and water retention, and can replace part of the synthetic latex.
Low, stable viscosity
Runs cleanly at high solids on size presses and coaters.
Textile sizing
A strong, flexible film on warp yarns improves weaving efficiency and abrasion resistance.
Send us your formulation and process conditions.
Tell us the product, process temperature, pH, shear and the result you need. Our application team will suggest grades and an evaluation route.