brochure downloads This month’s free Simply click on the brochure cover or link to download a PDF of the full publication Entek: Extrusion Solutions
This newsletter from Entek has cases studies on the company’s twin-screw extruders being used by DaniMer Scientific, Laurel BioComposites and O’Neil Color & Compounding, plus details of products launched at NPE 2012.
➤ Click here to download K-Tron: performance compounding
Smart Feeding & Conveying Solutions
Introduction
Application Example High Performance Compounding
The production of plastic consists of many important process steps, which are needed to generate a ho- mogeneous application specific plastic compound from a number of different raw materials.
Process
The compounding process is a continuous process. The main steps in the compounding process are:
conveying plasticizing/melting mixing homogenizing blending dispersing devolatizing reacting heating/cooling visc-breaking cooking pressurizing
Main Ingredients
The main ingredients which must be continuously and very accu- rately fed are base polymers such as PP and PE.
Typical Additives
Stabilizers, lubricants, plas- tifiers, colour pigments, fillers, flame retardant, cross linking agents, foam agents, etc.
Glass or carbon fibers for rein- for-cement, base polymer pellets for alloying to new compounds
Recycled material
The additives can be in the form of powders or masterbatch pellets.
Key Requirements One of the key requirements in high speed compounding is to ensure
High Performance Compounder
Loss-in-weight screw feeders
Twin screw side feeder
Devolatizing
Strand die head
Water bath
To bagging station
1 Air knife Pelletizer Polymer Additives Pigment
a continuous, uniform infeed with very tight short-term accuracy and repeatability.
Typical Production Output
Twin screw compounders are equipped with different screw diameters from 25 up to 150 mm in various steps depending on the manufacturer of the compounder. The typical line rates range from 50kg/h up to 6’000 kg/h.
End-Product Industries
Automotive, Building & Construc- tion, Appliances & Housewares,
Polymer A, polymer B and additives as a premix
Electronics, Furniture, Health & Hygiene, Leisure & Sport, Packag- ing, Pipes, Textiles, etc.
Masterbatch
With high per formance com- pounding technology, the time- consuming step of fine grinding of pellets and premixing in batch quantities can be eliminated. Pigments are fed directly into the melt by means of gravimetric feeders. Pigment concentrations up to 70 percent are possible. Compared with the old premix feeding method, the new process
Fillers
Chopped glass fibers
allows formulations with reduced wax content or no wax at all. This means that high performance compounding technology not only benefits productivity and quality but also contributes to reduced raw material costs.
Engineering Plastics
Compounding and pelletizing of engineering plastics (i.e. filling, reinforcing, alloying, colouring and degassing of PA, PP, PET, ABS, PUR, PC or POM) are the specialty of high performance compound- ers.
Typical layout for filling, reinforcing, alloying and colouring
Loss-in-weight belt feeder
Loss-in-weight vibratory feeder
Devolatizing
High Performance Compounder
Twin screw side feeder
Strand die head
Water bath
To bagging station
Air knife Pelletizer
Loss-in-weight screw feeder
Masterbatch production using new split feed technology
This white paper from K-Tron examines the feeding and conveying of raw materials for a variety of performance compounding applications, including the production of masterbatch and technical compounds.
➤ Click here to download
Timcal: carbon addtives
This new 24-page technical brochure from Timcal covers the company’s carbon additives for polymer compounds, including its Ensaco conductive carbon blacks and its Timrex graphite and coke.
PlasMec TRM Turbomixers
This eight-page brochure covers PlasMec’s TRM Turbomixer, which can be used for mixing PVC dry-blends, producing wood-plastics composites (WPCs) or the hot/cold dispersion of masterbatches/additives.
➤ Click here to download ➤ Click here to download
Steer: twin-screw extruders Get To Know Struktol Quick Guides
Struktol’s vast polymer additive experience is translated into the most intelligent solutions available anywhere. Each of our additives are tested and retested to insure maximum product quality and performance consistency.
STEER GENERATION NEXT BRANDS SPECIFICATIONS APPLICATIONS
* * CO-ROTATING TWIN-SCREW EXTRUDERS
Struktol manufactures a complete line of additives that function individually or in combination as adhesives, lubricants and surfactants, all accompanied by a wide range of benefits.
Case Studies Improved Processing
Improved Performance
This six-page brochure from Steer has specifications and target applications for its wide range of twin-screw co-rotating extruders, including the Alpha, Omega, Omicron and Mega Series machines.
Struktol Company of America
Struktol Company of America is a member of the Schill & Seilacher family of companies, with representation in over 100 countries around the world. A global organization with over a century of specialty chemical expertise, Schill & Seilacher markets most of their polymer processing products under the brand name STRUKTOL®
, a line of epoxy prepolymers and flame retardants.
A compounder of flame retarded polypropylene was unable to efficiently mold their compound due to the high temperatures and pressures required during processing. The molding conditions caused problems with the flame retardant system. By adding 1% of STRUKTOL®
TR 251
the customer was able reduce the process temperature by 20°C and reduce the pressures required to completely fill the mold.
A compounder of polycarbonate resin was able to reduce the viscosity of his product by 25% using 1% of STRUKTOL®
TR 044W without sacrificing any clarity
due to the additive. This viscosity reduction led to a corresponding reduction in molded-in stress which improved the mechanical performance of the material. In addition the additive provided improved mold filling and release.
Cost Reduction 12
A rigid PVC profile extruder was able to increase the addition level of regrind into his product by adding a costabilizing STRUKTOL®
V Series product. The additive
maintained the heat stability of the compound resulting in substantial cost per part savings due to the increased level of regrind added. No performance reduction was seen.
Struktol Company of America 201 E. Steels Corners Road P.O. Box 1649 Stow, OH 44224-0649 330-928-5188 800-327-8649 Fax: 330-928-0013 Email:
customerservice@struktol.com
www.4struktol.com S
Many Struktol Intelligent Additive Solutions are the result of a partnering effort between our customer and our sales and technical staff. If we don’t have the product that meets your needs you can count on us to develop something that exceeds your requirements.
EXTRUDERS.STEERWORLD.COM – a name
that has become synonymous with both quality and performance. Struktol manufactures chemicals for the plastics and rubber industry, foam inhibitors, polydispersions, silicone emulsions, products used in latex processing, and POLYDIS®
The Struktol approach to the rubber and plastic additives business is by no means typical or ordinary. Chemistry is at the heart of everything we do. Providing Intelligent Additive Solutions, Struktol products are designed to meet the challenges and exacting demands of our customers. Our technical specialists, R&D chemists and compound laboratory are dedicated to creating innovative solutions for the ever-changing polymer industry – solutions that keep you ahead of your competition with increased productivity, better quality parts and lower overall cost. In addition to premium product performance, Struktol Customer Service initiatives have become the industry benchmark.
Struktol: additives for plastics
This brochure from Struktol covers its wide range of additives for thermoplastics, including products for superior viscosity control, improved mixing and filler dispersion, plus reduced friction and plate out.
➤ Click here to download
TEB0047/2012
Intelligent Additive Solutions for Today’s Thermoplastic Industry
➤ Click here to download
If you would like your brochure to be included on this page, please contact Claire Bishop.
claire@amimagazines.com. Tel: +44 (0)20 8686 8139
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