KURARAY POVAL™ / EXCEVAL™
POLYVINYL ALCOHOL - APPLICATION GUIDE
The applications of polyvinyl alcohol are extremely wide-ranging. The main uses are in the paper, textile, construction and adhesive industries as well as cosmetics, packaging and electronics. The physical and chemical properties make polyvinyl alcohol very versatile. KURARAY POVAL™, EXCEVAL™ and ELVANOL™ are water soluble, have excellent film forming characteristics and high tensile strength.
BASIC PHYSICAL PROPERTIES OF PVOH RESIN
KURARAY POVAL™ BROCHURE
KURARAY POVAL™ BROCHURE (ESPANOL)
KURARAY POVAL™ AND EXCEVAL™ POLYVINYL ALCOHOL SPECIALTIES FOR PAPER COATING MATERIAL
BARRIER COATINGS FOR PACKAGING
There is a pull from the market to develop sustainable, novel and convenient packaging for extended shelf-life foods. At the same time there is an industry drive to increase the functionality of the produced paper and board and through that adding the commercial value. This is an opportunity for aqueous barrier coatings on paper and board.
KURARAY POVAL™ / EXCEVAL™ – TEMPORARY BINDER FOR CERAMICS
ATTRACTIVE PROTECTION FOR YOUR FOOD
EXCEVAL™ is the trademark of Kuraray’s chlorine-free barrier resin, especially designed for the requirements of the barrier coating industry. The new Ethylene-Modified copolymer is water-soluble like standard polyvinyl alcohol. However, coatings made of EXCEVAL™ absorb significantly less humidity at average temperature conditions.
SPECIALITIES FOR EMULSION POLYMERIZATION AND ADHESIVES
POLYVINYL ALCOHOL SPECIALITIES FOR PAPER APPLICATIONS
PVC SUSPENDING AGENTS – SPECIALITIES FOR POLYMERIZATION PROCESSES
PVC SUSPENDING AGENTS – SPECIALTIES FOR POLYMERIZATION PROCESSES (MANDARIN)
KURARAY POVAL™ FOR TEXTILE SIZING
The textile manufacture of spun yarn, which has grown based upon cotton, has a long history, and starch was used as a warp size from its beginning. As the use of polyester and polyester cotton yarn has increased, so have the demands on textile size. The need for productivity and quality has justified the higher cost of PVOH compared to starch. As weavers get used to the advantages of PVOH, it has become common to use PVOH on cotton yarns, with or without starch in the size.
KURARAY POVAL™ OBA CARRIER AND CO-BINDER FOR COATED PAPER AND BOARD
Paper and board are coated in order to improve the printability. A pigment coating increases the smoothness and reduces the porosity of the paper and board which influences ink absorption. When printing on a coated paper the ink stays more on the surface of the paper giving a higher print gloss and a more brilliant and more detailed print. The coating colors consist of pigments like clay and calcium carbonate, latex and additives. The additives are crosslinkers to increase wet strength, optical brightning agents (OBA) to increase whiteness and co-binders to give strength, water retention and viscosity to name a few.
KURARAY POVAL™ OIL AND GAS APPLICATIONS
KURARAY POVAL™ resin, when mixed with cement powder, water, dispersant and defoamer, will prevent fluid loss to the formation in cementing operations. KURARAY POVAL™ is an excellent binder, reduces fluid loss, reduces water production in the cementing process, and is compatible with other cement additives. It contributes to cost savings by enabling fast and cost-efficient oil well construction and has shown no retardation effect on the cement setting time.
KURARAY POVAL™ LV-GRADES FOR PERSONAL CARE APPLICATIONS
KURARAY POVAL™ LV-grades have been specially designed for cosmetic and personal care applications. For these grades we have compiled adapted regulatory brochures/ dossiers and give statements on: Nanomaterials, Heavy metals, Micro-plastics, Fragrances, Methanol, Animal testing and Biodegradation. The KURARAY POVAL™ LV-grades are produced under GMP conditions and have a specified Methanol (MeOH) content below 0,3% ex Germany and even below 0.1% ex Japan.
EXCEVAL™ – A FLUORINE FREE, BIODEGRADABLE AND REPULPABLE BARRIER POLYMER
Plastic packaging is a big generator of waste and only a small part of this waste is recycled. Increasing consumer awareness regarding plastic pollution on land and sea has pushed more and more governments to put bans on plastic. Besides plastics the use of fluorinated polymers in food packaging is also under discussion. Brand owners are following this closely and they are looking to replace plastic packaging and fluorinated polymers with more sustainable packaging options.
KURARAY POVAL™ FOR SUSPENSION PVC
Kuraray has much expertise in the use of polyvinyl alcohol (PVA or PVOH) based suspending agents for the needs of PVC manufacturers. In this application, polyvinyl alcohol is used as a protective colloid for the polymerisation of PVC. Vinyl chloride monomer is suspended in water by means of stirring, in combination with a suspending agent to allow the polymerisation reaction to proceed. The physical properties of the resulting PVC, including size, shape of the grains and bulk density, are directly related to the grain forming process during polymerisation.