Butyrate, as it is commonly known, is a cellulose ester modified by using butyric and acetic acids producing Cellulose Acetate Butyrate or CAB. Unlike other common synthetic plastics, the cellulosic plastics are not manufactured by polymerizing a monomer. Instead, they are produced by the chemical modification of cellulose, a natural polymer. Cellulose itself is not a thermoplastic, since it will not melt. Yet , by the viscose process, it is made into film (cellophane) and into fiber (rayon) that compete with the products of its thermoplastic derivatives.

What is Butyrate?

Butyrate, cellulose acetate butyrate, tubing is ideal in any length for storage, packaging and shipping. Tubes are transparent and rigid with excellent dimensional stability and rigid with excellent dimensional stability and high impact strength. They are strong, durable and easy to fabricate. Butyrate tubing can be cut and sawed with standard equipment.

Cellulosics, as a group, are characterized by good strength, toughness, and high surface gloss. In addition, they have good chemical resistance, good clarity, sparkle, and will take decoration readily. Cellulose acetate butyrate is tougher than acetate and has lower moisture absorption. It resists weathering and has excellent transparency. Although it is adversely affected by alcohol, alkalis, paint removers, and acetones, it is resistant to most household chemicals. Additionally, CAB is resistant to the harmful effects of ultra-violet radiation.

It is used for high gloss vacuum formed faces in back lighted signs, especially small point of purchase signs. Designers of display units especially like CAB sheet for its deep-draw properties, ease of formability, and impact resistance.

Because of its clarity, good impact resistance, ease of fabrication, and wide range of sizes, CAB tubing is an excellent choice for clear rigid tubing. CAB tubing is widely used in the packaging industry.

Eastman UVEX Brand CAB Cellulose Acetate Butyrate Sheet is a highly impact-resistant plastic used for thermoforming a variety of OEM products for various applications. It qualifies as a Type I, Grade I material under the requirements of Standard Specification for Cellulose Acetate Butyrate Film and Sheeting for Fabricating and Forming (ASTM Designation: D2411-69).

Combining long-term weather resistance with clarity and ease of forming at a wide range of temperatures. It is adaptable to most conventional methods of heating and forming. It will form satisfactorily at temperatures ranging from about 230ºF to about 320ºF. It heats and cools considerably faster than most other plastic sheet used for forming outdoor components. Uniform parts are obtained consistently because of strict control of sheet thickness.Strong, rigid parts with minimal thinning of the sheet in the areas of greatest stretching, are produced by the use of appropriate draft use on the mold. The proper draft will depend on both the depth of draw and the drawdown ratio for each part.

CAB Sheet can be painted or silk-screened by using any one of the generally accepted acrylic-base paints or inks used for materials of this type.

Eastman UVEX Brand CAB Cellulose Acetate Butyrate Sheet is stocked in a standard nominal sheet size of 50" x 76". It is also available in custom production blanket sizes in thicknesses ranging from 0.060 to 0.325 inch. CAB Sheet is available in 21 standard resin colors, as well as a wide spectrum of custom colors in transparent, translucent, and opaque.

"Properties", Applications" and "Availabilities" for the Butyrate Sheet and Tubing are at the bottom of this page.

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 Butyrate Sheet
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 Butyrate Tubing
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Minimum $75.00 for internet orders. Orders less than $75.00 will be charged a $25.00 service charge.
The price given on this page is a material quote only. It does not include the additional shop processing fees.


Properties, Applications and Availabilities for the Butyrate Sheet and Tubing




Clarity Packaging Film: .003" to .030"
Ultra-violet resistant Signs Sheet: .060" to .250"
Ease of fabrication Machine guards Tubing: .060" I.D. to 6.000" O.D.
High gloss Glazing  
Impact resistant    
View Butyrate Data Sheet