Exceval™
A fluorine free,biodegradable*and repulpablebarrier polymer* Exceval™ is inherently biodegradable when dissolved in water

Exceval™

Barrierpackaging in acircular economy
Plastic packaging is a big generator of waste and only a small part of thiswaste is recycled. Increasing consumer awareness regarding plastic pollution
on land and sea has pushed more and more governments to put bans onplastic. Besides plastics the use of fluorinated polymers in food packaging
is also under discussion. Brand owners are following this closely and theyare looking to replace plastic packaging and fluorinated polymers with moresustainable packaging options. The replacement of plastic packaging andfluorine-containing packaging calls for smart, innovative and sustainable
packaging solutions. This is a big opportunity for paper and board coated withKuraray’s fluorine- free, inherently biodegradable* and repulpable barrier
polymer Exceval™.
* Exceval™ is inherently biodegradable when dissolved in water.

Exceval™

Modified moistureresistant polyvinyl alcoholwith a high barrier against
oxygen, oil and grease
O2GTR versus Coating Weight of Exceval™ AQ-4104
O2GTR, cc/m 2 • day • atm 23°C-65%RH

Exceval™ is modified polyvinyl alcohol. It is a nonionic watersoluble polymer which makes it well suited for water-based
barrier coatings. Exceval™ is a linear and crystalline polymer.
The hydrophilic nature of polyvinyl alcohol makes it an excellent barrier against grease and oil, as well as mineral oils. The
hydrogen bonds between the polymer chains, together withthe crystalline structure, make Exceval™ one of the best barrier polymers, against oxygen and other gases such as carbon
dioxide, on the market. The modification of Exceval™ makes it
more moisture resistant and a better film former compared
to conventional polyvinyl alcohol. Exceval™ may be used asfood contact material as it complies with BfR, FDA (FCN1179) and China GB.

AQ4104
43.5
32.5
2
1.5
10.5
000.25µm

0.4
2.5µm

0.6
1.7µm

0.8
1.25µm1/thickness, μm-1
*1 μm thickness equals about 1 g/m 2AQ-4104 coating

11µm

1.2

Biodegradability

Biodegradabilityof Exceval™

Certificate test
Test method: ISO 14851
Sludge concentration: 100 mg/L
Sample concentration: 100 mg/L

Cellulose

Biodegredation (%)

Polyvinyl alcohol (PVOH) is recognized as one of the very few
vinyl polymers which is water soluble and biodegradable inwater in the presence of suitably acclimatized micro-organisms. Also, Exceval™ is inherently biodegradable according toISO 14851. This has been confirmed by internal tests as well
as at external laboratories. Exceval™ has also been shown tofulfill the requirements of compostability when it comes tobiodegradation, heavy metal content, fluorine content andecotoxicity.

120110100908070605040302010007

Exceval™ AQ-4104

14212835424956

Time (days)

Recyclability

Recyclability of Exceval™
coated paper and board

Exceval™
product portfolio?
Our Exceval™ polymers are already widely used in thepaper industry. They can be coated with all commonly used coating methods like metric size press,
blade coating, rod coating, gravure coating or curtaincoating. Kuraray offers a wide range of products tomeet the requirements and needs ofdifferent applications.
Please contact your local Kuraray office
to discuss the right Exceval™ productfor your needs.

Exceval™ AQ-4104

Reject, %Exceval™ coated paper and board can offer a sustainable andrecyclable alternative to plastic packaging. Studies made incooperation with a university confirm that Exceval™ coatedpaper and board is repulpable and thus can be recycled instandard paper streams. The results show that the type ofExceval™ as well as its coat weight influence the fiber reject,
but still both of the investigated Exceval™ grades were considered repulpable.

Exceval™ HR-3010

02468Coat Weight, g/m 2101214

Adding value toyour products –worldwide
Kuraray Poval™, Exceval™, Elvanol™ and Mowiflex™ are the trademarks for polyvinyl alcohols
made by Kuraray. Their key characteristics — outstanding film-forming properties and high binding strength — add real value to your products. Our polymers are water-soluble, highly reactive,crosslinkable and foamable. They have high pigment binding capacity, protective colloid characteristics and thickening effects. The physical and chemical properties of Kuraray Poval™ makeit ideal for a wide variety of applications, ranging from adhesives through paper and ceramics
to packaging films. Many of our polymers are food contact-approved and thus suitable for foodapplications. Ecologically Kuraray Poval™ is advantageous due to its biodegradability and the factthat combustion does not generate residues. It is available in various particle sizes from granules
to fine powders.
Kuraray produces its wide range of Kuraray Poval™ grades in Japan, Singapore, Germany and theUSA. Kuraray’s global production and service network make us your partner of choice for innovative high-quality PVOH resins.
Kuraray – Here to Innovate.

Headquarters
Kuraray Co., Ltd.
Tokiwabashi Tower
2-6-4, Otemachi
Chiyoda-ku
Tokyo, Japan 100-0004
Phone: +81 3 67 01 1000
infopoval.jp@kuraray.com

Kuraray Poval™
product portfolio
Please contact your local
Kuraray office to discuss theright Kuraray product foryour needs.

Kuraray America, Inc.
2625 Bay Area Blvd.,
Suite 600 Houston, TX77058
United States of America
Phone: +1 800 423 9762

Kuraray Asia Pacific Pte., Ltd.
250 North Bridge Road
#10-01/02 Raffles City Tower
Singapore 179101
Phone: +65 6337 4123

info.kuraray-poval@kuraray.com

infopoval.sg@kuraray.com

Kuraray Europe GmbH
Philipp-Reis-Str. 465795 Hattersheim am Main,Germany
Phone: +49 69 305 85 351

Kuraray China Co., Ltd.
Unit 2207, 2 Grand Gateway
3 Hongqiao Road, Xuhui District,
Shanghai 200030, China
Phone: +86 21 6119 8111

info.eu-poval@kuraray.com

infopoval.cn@kuraray.com

01_2022