ELVANOL™ T-25

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Elvanol™ T-25 by Kuraray is copolymer polyvinyl alcohol with high film strength, abstrasion resistance and excellent adhesion. Elvanol™ T-25 is used as a warp size for spun yarns including acetate, acrylic, cotton, wool, nylon, and polyester spun and such blends as polyester/cotton, polyester/wool and polyester/rayon.

Functions: Resin

Chemical Family: Vinyls, Vinylics & Vinyl Derivatives

Technical Data Sheet

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Identification & Functionality

Plastics & Elastomers Functions

Features & Benefits

Advantages

Size bath formulas based on Elvanol® T-25 are simple and easy to prepare, and run without difficulty on the slasher. Important performance advantages of Elvanol® T-25 as a warp size include the following:

LOW ADD-ON

The high film strength, abrasion resistance, and excellent adhesion of Elvanol® T-25 permit its use at about one-half of the add-on required with starch formulas. Since lower add-on results in less shedding 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 turn means increased production at lower labor costs. “Tight” constructions are easier to weave at low size addon, as there is more air space in the reed. Finally, the lower weight of size present reduces freight costs on shipments of gray cloth to finishing mills.

HIGH WEAVING EFFICIENCY

Yarns sized with Elvanol® T-25 show excellent weaving performance with few loom stops. Since warp yardage per beam is greater, loom time per beam is longer.

LOW WEAVE ROOM HUMIDITY

Although weaving efficiency remains high over a wide range of humidity, warps sized with Elvanol® T-25 do not require high humidity for good weaving performance. Consequently, a more comfortable working atmosphere can be maintained without sacrificing efficiency. Lower humidity also prolongs the life of loom parts that are subject to corrosion in moist atmospheres.

EXCELLENT SIZE BATH STABILITY

Solutions of Elvanol® T-25 are noncorrosive and are not subject to spoilage. Unlike starch sizing material, they can be 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-25 dissolves readily in hot water, without the need for costly enzymes. It is easily removed, even from heat-set polyester/cotton fabrics.

FAVORABLE COST PERFORMANCE

The foregoing advantages make the overall cost/ performance of warp sizes based on Elvanol® attractive, particularly for polyester blend yarns where ordinary sizes do not perform well at the low add-on required to achieve fabric quality. Further savings are realized through reduced labor costs in the weave room and reduced freight costs on gray goods. In addition, finishing mills realize cost advantages resulting from elimination of the need for enzymes used to desize starch and the reduced amount of solids to be removed.

 

Applications & Uses

Markets

Properties

Typical Properties
ValueUnitsTest Method / Conditions
Viscosity (20°C (68°F), 4wt% aqueous)24.0 - 32.0cps
Degree of Hydrolysis99.5mol %
Ash Content (Sodium oxide)max. 0.7%
Residual Methanol Contentmax. 0.99wt %
pH5.0 - 7.0-
Volatiles Contentmax. 5.0wt %

Technical Details & Test Data

Resin Characteristics

Elvanol® T-25 is a unique copolymer polyvinyl alcohol designed specifically for use as a warp size for spun yarns. Supplied as a white, granular solid, it slurries easily in cold water without lumping and dissolves readily on heating. Solutions of Elvanol® T-25 do not gel or mold, they can be stored over weekends and shutdown periods without impairing their usefulness.

Storage & Handling

Safety and Handling

Elvanol® T-25 is technical quality polyvinyl alcohol. It is not recommended for inclusion in any food or preparation that might be taken internally.

Elvanol® may be disposed of by incineration or landfill. However, any disposal method must be in compliance with all applicable local, state and federal regulations.