Bringing textiles
to life –Elvanol™ in thetextile industry

Elvanol™

Bringingtextiles
to life
Advantages ofElvanol™ T-Grades
Low Add-On

Environmentally Friendly

The high film strength, abrasion resistance, and excellent
adhesion of Elvanol™ T-Grades permit their use at about
one-third to one-half of the add-on required with starch formulas. Since lower add-on and higher adhesion result in lessshedding on the loom, less frequent cleaning of drop wires,
heddles, and reeds is required. Reduced add-on also permits
greater warp yardage per beam, with consequently fewer
doffs at the slasher and fewer tie-ins at the looms. This in turnmeans increased production at lower costs.

Elvanol™ T-Grades have low Biological Oxygen Demand (BOD)
compared to many other sizes. Combined with the ability to
weave efficiently with low add-on, this results in a low BOD
and COD (Chemical Oxygen Demand) in the desize stream toa finishing mill’s waste water treatment plant. Elvanol™ copolymers are degradable in properly designed and operated
activated sludge waste water treatment systems.

High Weaving EfficiencyYarns sized with Elvanol™ T-Grades show excellent weaving
performance with few loom stops. Good hairiness reduction
results in low warp-related filling stops on air jet looms.

Low Weave-Room Humidity
Weaving efficiency remains high over a wide range of humidity’s as Elvanol™ T-Grades remain flexible at low humidity,
and are not softened at higher humidity’s. High humidity is
not required for good weaving performance.

Economically Recoverable andReusable
The unique molecular structure of the Elvanol™ T-grade copolymers is extremely chemically stable, and is not hydrolyzed or otherwise chemically altered in the heat and stressesof a size recovery system. The T-grades are easily recovered
and reused in any type of commercially available ultrafiltration system. Reuse is straightforward, as there is no viscosity
change during desizing, ultrafiltration, or storage.
High concentrations can be achieved, reducing transportation costs and providing maximum flexibility in reuse of thereclaimed solutions.

Excellent Size Bath Stability
Solutions of Elvanol™ T-Grades are non-corrosive and are notsubject to spoilage. Unlike starch sizing materials, they canbe held at elevated temperatures for days without viscosity
degradation. There is no need to heat pipelines to prevent gelling of the size solution.

Ease of Desizing
Elvanol™ T-Grades dissolve readily in hot water, without theneed for costly enzymes. They are easily removed, even fromheat-set polyester/cotton fabrics. Film dissolution studies
show Elvanol™ Grades T-66 and T-91 to exhibit better dissolving characteristics than medium or high viscosity partiallyhydrolyzed grades at 140-160°F (60-71°C).

Performanceadvantages
Elvanol™ T-Grades are unique copolymers
developed especially for use as warp sizes forpolyester/cotton blends and other spun yarns.
Alone, or in combination with starch andadditives, Elvanol™ T-Grades are being usedsuccessfully on many different types of spun
yarn, for example:
acetat, acrylic, cotton, rayon, wool
nylon and polyester spuns
blends as polyester/cotton, polyester/wool,
and polyester/rayon.

Resin Characteristics
Supplied as white, granular solids, Elvanol™ T-Grades slurry
easily in cold water without lumping and dissolve readily
on heating.

Preparing Size Solutions

Size Bath Formulas

Elvanol™ polyvinyl alcohol disperses smoothly in cold waterand dissolves readily on heating. Size baths based on Elvanol™
alone or in combination with starch are easily prepared in all
types of equipment now being used for size preparation.

Elvanol™ T-Grades can be used alone or in combination withstarches and additives, depending on the yarn and weave andon individual mill preference. Its applications range from:▪ a 100% PVOH single component size for polyester,▪ to 50-75% PVOH/starch blends for polyester/cotton blends,▪ to 50% PVOH/starch blends for cotton to use as a binder
in 10-15% PVOH/starch blends for denim and towel pileformulations.

Effects of Concentration on
Viscosity of Elvanol™ at 160°F
Size Bath Formulas
T-25

T-25LR

T-66

As a single-component size, polyvinyl alcohol is effective at
low add-on for use with the entire spectrum of spun yarns
being woven today, including natural, synthetic, and blend
yarns such as polyester/cotton spun blends. The low add-on
at which Elvanol™ can be applied as a single component size isparticularly advantageous for tight fabric constructions thatare difficult to weave. In combinations with starch, Elvanol™
improves the strength of the size film and provides the required adhesion to synthetic yarns

T-91

Viscosity (mPa•s)(Brookfield LVF Viscometer at 60 RPM)

10000

1000

100

10

1
4%

6%

8%

10%

12%

14%

% Elvanol™ in Solution

16%

18%20%

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

02_2022