Kuralon™

Polyvinyl-alcohol (PVA) CAS # 9002-89-5

Kuralon PVA

Properties

• tensile strength (dry) • 48,000-110,000 lb/in^2 • specific gravity: 1.26-1.3

• regain of 4.5-5.0% • absorbency: 12% • shrinkage is 10% @ 215ºC • begins to turn yellow at 220ºC • Melts at 230-235ºC • Does not burn readily

Kuralon PVA

Method of Preperation

• vinyl acetate polymerized to polyvinyl acetate • saponified to polyvinyl alcohol • dissolved in H2O and wet spun into an aqueous salt bath • resulting yarn is stretched, heat treated, reacted with formaldehyde to 30% degree of substitution

Availability

• continuous multifilament • monofilament • staple fiber • comes in black, blue, or green

Kuralon PVA

Uses

• reinforced concrete • tyre cords • filter cloths • nets, ropes, cloths • clothing materials

Kuralon PVA - FRC

Designed for long-term concrete crack control.

1lb/yard^3 reduces shrinkage cracking +40% after 28 days. Makes for a 50% improvement when compared to other polypropylene fibers recomended 1-2lbs/yard to reduce plastic and long term shrinkage.

Kuralon PVA - FRC

Current Reports:

reduces concrete cracking by 40% http://www.allbusiness.com/chemicals/plastic s-rubber-industry-resins/5131279-1.html

http://findarticles.com/p/articles/mi_m0EIN/is _2005_Nov_9/ai_n15786264/ “molecular bonding between the newly engineered fibers and concrete is 300% stronger than that of polypropylene, fiberglass or steel fibers” http://concreteproducts.com/mag/concrete_b ond_strength_improves/

Sources 1) Kuraray Co. Ltd. Website http://www.kuraray.co.jp/kii/english/ 2 ) Hawley's Condensed Chemical Dictionary (15th Edition) http://www.knovel.com.ezproxy.uky.edu/web/portal/ 3) Myanmar Ministry of Science: http://www.most.gov.mm/techuni/media/TE_03028_5.pdf

4) http://www.nycon.com/RSC15.htm