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Compounding suppliers' data sheets.


Compounding, Blending and Drying Equipment for Plastics Processing

Paul O. Abbe equipment has been proven during decades of use in the production of plastics.

For example, Rota-Cone [R] vacuum dryers are being used for vacuum drying, polymerization and high temperature processing; ball mills and Rota-Cone blenders are being used for compounding operations; standard ribbon mixers for the addition of plasticizers, stabilizers, etc.; and vacuum ribbon mixers for drying after mixing.

Vacuum Drying

Materials such as polyurethane, polyethylene, fluorocarbons, ABS, PVC, etc. are quickly and safely dried by Rota-Cone vacuum dryers. For most applications, they offer gentle, effective drying. Final moisture levels can be as low as 0.0001%.

The gentle tumbling action provided by the double-cone design assures homogeneous blending with minimal effect on particle size or shape.

The Rota-Blade [R] vacuum dryer is an agitated dryer that provides fast drying of free-flowing, pulpy and liquid products, as well as products that tend to agglomerate in other types of vacuum dryers. Plastics for which the Rota-Blade dryer is being used include polyester, polyethylene and PVC.

High Temperature Processing

For both polymerization and drying of polymers, the Rota-Cone vacuum dryer can be equipped to operate at temperatures as high as 600 deg F, with vacuum down to 0.2 torr.

In a recent application, Paul O. Abbe supplied a 120" diameter Rota-Cone unit with a 500 cu. ft. operating capacity and a processing temperature of 450 deg F.

Vacuum dryers for high temperature processing can be supplied in a range of capacities from 0.3 to 500 cu. ft.


Many companies use Paul O. Abbe Rota-Cone blenders for blending and coloring materials such as polyethylene, polypropylene and polystyrene. Typically, a 10,000 lb batch can be processed in about 20 minutes in a 10 ft diameter unit.

Rota-Cone blenders can be obtained in operating capacities of 0.2 to 500 cu. ft.

Paul O. Abbe ribbon mixers also find wide application in mixing and compounding. Some processors use our ribbon mixers in the production of PVC resins and copolymers. Here, resins are blended with plasticizers and stabilizers. Jacket heating is then utilized to dry the compounded material.

Others use the ribbon mixer to uniformly disperse small amounts of colorants throughout, for example, a large batch of cellulose acetate.


Manufacturers of plastisols use Paul O. Abbe ribbon mixers to gradually add dry ingredients into the liquid contents of the mixer during operation. After mixing, the blender operates under vacuum to deaerate the mix.

We have units of this type in the field in sizes from 5 gal to 550 gal.


Jacketed heating and cooling ribbon mixers are used both singly and in tandem during plastics processing. In some cases, Paul O. Abbe heating mixers are used to prepare PVC dry blend in extra large batches in order to assure product uniformity. In other installations, ribbon mixers are used for the efficient cooling of hot resin from high speed mixers.

Occasionally, a piggy-back heating/cooling unit is called for. Here, a heating mixer is mounted above a cooling mixer. The PVC blend is first processed in the upper heating mixer, then directly discharged into the cooling mixer below.

Ribbon mixers are offered in operating capacities from 0.12 to 200 cu. ft.


One example of the use of ball mills in plastics processing would be their use in the grinding and mixing of the dry powders that are used in the production of melamine dishware.

Another recent example is in the processing of thermosetting plastic epoxy.

Ball mills are available in lab sizes up to 3000-gallon working capacity.

Through many years experience in plastic materials transformation, McNeil Akron has developed a full line of mixers to complete an extrusion operation. With the purchase of Papenmeier-France and the addition of their technical staff, McNeil Akron is able to offer the U.S. marketplace the finest quality High Intensity Mixers in the world.

A full manufacturing facility and technical support staff in the U.S. assure top quality and efficient service on its full range of mixers including small laboratory types. For the preparation of soft or rigid PVC compounds, McNeil Akron offers both heating mixers (MC type) and heating/cooling mixers (MCR type).

All McNeil Akron mixers are designed for efficient production, ease of operation, and minimum maintenance and cleaning costs. Cleaning is facilitated by construction design, the materials used, and provisions for easy access to all service areas. Multiple seals in critical areas help avoid contamination and protect the bearings and transmission system. This results in less maintenance, longer life, and increased productivity. There are twelve standard models to match most applications including two lahboratory mixers. We offer complete lines including storage, weighing, and automatic feeding. Custom production is available for special application purposes.
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Title Annotation:1990-1991 Manufacturing Handbook and Buyers' Guide
Publication:Plastics Technology
Date:Jul 15, 1990
Previous Article:Compounding, mixing, blending systems: product lines reviewed.
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