brochure downloads This month’s free Simply click on the brochure cover or link to download a PDF of the full publication Comac: compounding lines
This 28-page brochure from Comac covers the design and manufacture of the company’s compounding and masterbatch lines. It includes technical details of its range of twin-screw extruders.
Premix: Carbon Black Magic
CARBON BLACK MAGIC TURNING ELECTRICALLY CONDUCTIVE PLASTICS INTO PRODUCTS
this is the first installment in a series of articles on the processing of premix’s electrically conductive plastics. the series kicks off with a look at the key element of conductive compounds – carbon black – and how it is used for creating the perfect compound mix.
Low structure
Carbon black magic Conductive carbon black is the most reliable and cost-efficient choice for producing electrically conductive plas- tic compounds. The secret behind the perfect carbon black compound lies in three important factors: • Selecting the optimal carbon black type for the purpose;
• Formulating the compound; • Optimizing the compounding technique.
Electrically conductive plastics are used in countless processing methods and final applications. The role of the compounder is to ensure that above factors are executed correctly and to help the customer take full advantage of the compound in the manufactur- ing process. Together, these measures guarantee that the desired goals for the end products are met successfully.
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Step 1: picking the right carbon black Carbon black comes in many differ- ent varieties. The carbon black that
High structure
works perfectly in truck tires is not the right choice for conductive compounds. Selecting the carbon black with just the right features is the first important step towards a successful end product. The most important factor affecting
the electrical performance of carbon black is its structure. Particle size and porosity also have an impact on the electrical behavior of the electrically conductive compound. Factors that improve electrical conductivity: • High structure: high structure means that the carbon black agglomerates form long and branched chains. Such a structure is ideal for conductive compounds – the required conductivity can be reached with lower loading levels.
• Small particle size: smaller size means higher electrical conductivity. If the particles are small and relatively uniform in shape, their surface area is larger than otherwise. Extra conductive carbon blacks, with the smallest particle size, provide the highest electrical conductivity.
• High porosity: higher particle porosity enables better electrical conductivity.
Step 2: Formulating the right mix After exceeding a certain loading level, carbon black changes the electrically insulating base polymer into electri- cally conductive plastic. The decrease in electrical volume resistivity due to the increased amount of carbon black can be described using a percolation model. The percolation behavior of car- bon black depends on the qualities men- tioned in step 1: particle size, structure and porosity. Premix’s R&D specialists can select
just the optimum carbon black load needed to achieve the required elec- trical properties. Finding the correct loading level is extremely important: too high a carbon black load has a negative impact on the compound’s mechanical properties. It also increases viscosity, causing problems in the injection mold- ing process, for example. The percolation curve illustrates the relationship between the quantity of
Conductive compounds specialist Premix has published this white paper that looks at selecting, formulating and compounding carbon black to make high-quality electrically-conductive plastics.
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BKS: pelletizing technologies Quality Control BKS, more than just machines, People with Know-How
For more than 25 years BKS is a leading supplier in various businesses such as Plastics, Recycling, etc.
BKS stands for top quality in standard and tailor made solutions.
The workshop of BKS is located in Lambermont Belgium. Our team of experts and the use of up-to-date machinery offer you grinding, modification and sharpening into as new condition of all your precision knives.
Strict controls assure a very high and constant quality.
BKS re-sharpening procedure consists of: Identification.
Worksheet and procedures in our computer system with unique order number.
De-mounting, cleaning and analyze.
If repair or extra work is needed, quote for approval/release (to be agreed).
Re-sharpening according OEM specifications.
Maintenance and replacement of bearings, seals etc.
Complete measurement report saved in our computer system and shipped with every delivery of the re-sharpened cutting rotor.
BKS s.a. - n.v. Rue Jean Koch, 4
B-4800 Lambermont
Tel : +32 87.31.09.06 Fax : +32 87.31.43.27 Email :
bks@bks.be Site :
www.bks.be
Know-how, experience, machinery and our permanent search for top quality and precision are anchors for BKS. We guarantee that our products and services will comply above your expectation.
PELLETIZING AND
PULVERIZING TECHNOLOGIES
www.bks.be
This brochure covers the services offered by BKS including the sharpening, maintenance, cleaning and repair of strand and die-face pelletizer systems and their components. BKS also supplies new wear parts.
Strand Pelletizer T200 Series Granulador de Hebra SerieT200
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Reduction Engineering: pelletizers
This brochure covers Reduction Engineering’s T200 Series strand pelletizers. They are designed to reduce maintenance and cleaning times – disassembly procedures that would typically take 30 minutes now take just 2 minutes.
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Wacker: Genioplast Pellet S CREATING TOMORROW’S SOLUTIONS PLASTICS I PERFORMANCE ADDITIVE
UPGRADE YOUR PERFORMANCE WITH GENIOPLAST®
PELLET S
This 20-page technical brochure from Wacker looks in detail at the company’s Genioplast Pellet S performance additives for plastics. It covers applications in polyolefi ns, engineering plastics and thermoplastic elastomers.
Click here to download
PlasMec: PVC mixing/cooling
This brochure covers PlasMec’s HEC High Effi ciency Horizontal Cooler for the production of rigid or plasticized PVC dry-blend. Available in sizes up to 8,000 litres, it delivers high levels of effi ciency, throughput and quality.
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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