KURARAY POVAL™

Paper

Kuraray Poval™ and Elvanol™ transform paper into art. With outstanding adhesion with cellulose due to hydrogen bonding, film strength, barrier properties, binding strength of filler, and dispersing performance, Kuraray Poval™ and Elvanol™ are used in a variety of paper applications. For example, the specialty grade Exceval™ enhances and improves paper performance by improving water, chemical, and oil resistance. 
Kuraray Poval™ and Elvanol™ offer significant advantages for strength and barrier properties in the commodity and specialty paper market.

paper packaging; barrier for paper based packaging

Exceval™ Barrier for Paper-based Packaging

Exceval™ combines the unique properties of polymer technology with our expertise in barrier technology. Using Kuraray’s expertise, high gas barrier plastic packaging can be extended to paper structures by coating Exceval™ onto the paper substrate. Alternatively, the similar oil and gas barrier chemistry of Kuraray Poval™, Elvanol™, or Exceval™ can be applied via many aqueous paper coating techniques. For more information, visit the Barrier Films Application page.

Exceval™ – A fluorine-free, biodegradable and repulbable Barrier for Polymer Exceval™: Solving Pain Points in Pet Food Packaging Polyvinyl Alcohol Specialties for Paper Applications

Polyvinyl Alcohol specialties

Kuraray Poval™ and Exceval™ are soluble polymers that dissolve in water to give viscous transparent solutions. Applications cover a broad spectrum of uses in the paper, textile, construction and adhesives industries as well as in the cosmetics and packaging sectors.

Polyvinyl Alcohol Specialties for Paper Applications

Polyvinyl Alcohol specialties
Packaging for the food industry

Barrier Performance

Kuraray Poval™, Elvanol™, and Exceval™ are 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. Kuraray Poval™ and Elvanol™ have excellent film formation properties, and films made of Kuraray Poval™, Elvanol™, and Exceval™ have higher tensile strength than those made from starch alone.

Barrier Coatings for Packaging

KURARAY POVAL™ for Tissue Production

KURARAY POVAL™ plays an important role in tissue manufacturing as a part of Yankee coating. This coating technology is used in the manufacture of high-quality structured tissue.

The main function of KURARAY POVAL™ in Yankee Coatings is to give a good pick up of the sheet and to give bulk to the coating. In addition to this KURARAY POVAL™ also influence adhesion of the sheet to the Yankee, creping as well as the rewetting of the coating.

Traditionally, medium to high molecular weight and partially hydrolyzed grades have been used in Yankee coating for high-quality tissue. 

Several pilot and production trials with KURARAY POVAL™ 200-88 KX have confirmed a better sheet pick-up and runnability compared to PVOH types normally used in Yankee coatings. The better runnability results in less web breakes and enabels the reduction of the needed Yankee coating amount. 

Kuraray Poval™ in Tissue Applications

KURARAY POVAL™ for Tissue Production
Binders and Coatings

Binders and Coatings

Kuraray Poval™ and Elvanol™ are effective binders in coating formulations at the size press. Because of their excellent binding performance, they can replace starch on a one-to-five basis. With the incorporation of Kuraray Poval™ and Elvanol™ into binding solutions, the optical and surface properties are improved compared to a clear, uncoated sheet. In other sectors, Kuraray Poval™ and Elvanol™ are used as powerful binders to produce matte, glossy, or high-speed industrial inkjet papers. Additionally, both are used in thermal dyestuff dispersant, a thermal top coat agent under a combination with a crosslinking agent for thermal paper/label application.

OBA Carrier and Co-Binder for Coated Paper and Board

  • Improves surface strength
  • Improves printability
  • Good compatibility with starches and CMC
  • Higher water resistance than starch
  • Lower BOD and COD than starch
  • Improves binding strength of inorganic substances like filler and silica
  • Enhances performance of fluorescent whitening agents
  • Reduces sheet porosity and provides oil and grease barrier
  • Will absorb water- or glycol-based ink
  • Will disperse leuco dye/developer of thermal paper
  • Cross-linking capability
  • Excellent gas barrier

  • Carrier of fluorescent whitening agents of Coated Paper
  • Surface sizing of Coated Paper/Banknote Paper/Paper Board Liner
  • Inner layer of Silicone Release Liner
  • Grease-proof paper as fluorochemical extenders
  • Ink-absorbing layer of ink jet printing paper
  • Dispersant of leuco dye/developer of thermal paper
  • Thermal paper top coat agent with a combination of crosslinking agent
  • Gas barrier paper
  • Micro-encapsulation aid in NCR paper (carbon-less paper)

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Learn more about our wide range of high performance materials for sustainable packaging solutions and download our case studies.

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