Paper
Polyvinyl alcohol (PVA), a key multifunctional additive in the paper industry due to its excellent film-forming properties, adhesion, chemical stability and biodegradability. It is mainly used for surface sizing, coating, reinforcement, bonding and functional modification, which can significantly improve paper strength, printability and special barrier properties. It’s suitable for the production of various types of cultural paper, packaging paper, specialty paper and other products.
Excellent Performance of Surface Strength
PVA can help to improve paper’s tensile, burst, and flexural strength. It can also enhance ink absorption and dot reproduction in printing, and improve surface smoothness and water resistance.
As a surface sizing agent, PVA forms a continuous, dense film after drying, sealing the pores of the paper sheet. This enhances surface strength, reduces dusting and lint shedding, improves paper stiffness, and enhances processing and performance.
As an interlayer adhesive, PVA penetrates the fiber gaps in multilayer paperboard, forming a cross-linked network that significantly improves interlayer bonding strength, reduces the risk of delamination, and enhances compressive strength.
Enhance binding strength
PVA improves internal bond strength, wet strength, and tear resistance of paper, contributing to enhanced recycling performance of waste paper fibers. Interlayer adhesives are used for bonding , penetrating fibers to form a cross-linked network, strengthening interlayer bonding, increasing paperboard stiffness and compressive strength, and improving water resistance.
Barrier Performance
PVA is the strongest waterborne film-formers commercially available to the paper industry. With properties including chemical resistance to oils, waxes, organic solvents, and water, it is the superior material compared to starches and is used as the silicone barrier layer of Release Liner products.