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Poly.ERP: case study 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.
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 Cost Reduction
This 16-page case study from Kirchhoff Datensysteme examines the development of its
Poly.ERP customised ERP system for compounders and how it was successfully implemented at Polymer Chemie.
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®
Struktol Company of America 201 E. Steels Corners Road P.O. Box 1649
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.
A rigid PVC profile extruder was able to increase the addition level of regrind into his product by adding a costabilizing STRUKTOL®
Stow, OH 44224-0649 330-928-5188 800-327-8649 Fax: 330-928-0013
Email:
customerservice@struktol.com www.4struktol.com 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.
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.
– 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
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.
Steer: SPL40 turn-key lines
This eight-page brochure covers Steer Engineering’s new SPL40 compounding pelletizing systems that include feeders, extruders, strand die heads, water troughs, air knives, pelletizers and classifiers.
➤ Click here to download
➤ Click here to download
K-Tron: producing LFTs
Smart Feeding & Conveying Solutions
Application Example Long Fiber Reinforced Thermoplastics
New Technologies
Long Fiber Reinforced Thermo- plastics are a recent development in newer technologies where PP or thermoplastic material is directly compounded with long glass fibers (rovings) and then molded in one operation. Long Fiber Thermo-plastic technologies are the buzz of the auto industry in Europe and the US and are one of the most important trends in the plastics industry today.
Glass fibers of ½” (12 mm) up to 2“ (50 mm) length give much higher stiffness, strength and toughness than the 1/8“ (3 mm) fibers that have been used for reinforcement for decades.
Long Fiber Reinforced Thermo- plastics (LFT) have excellent mechanical properties and stiffness-to-weight ratio which is of great interest to the auto- motive industry. These in-line compounding processes for long fiber material offer users more flexibility, as they are able to both compound and process such
materials in accordance with their own formulation and also use ready made compounds.
For this process gravimetric feed- ers are used to feed the main polymer as well as the additives. Short term accuracy is one of the key elements because of the very short residence time in the twin screw compounder. The process requires a 5–8% 2Sigma devia- tion at a sample time of 5–10 sec. at a feed rate of 1.5 kg (3.3 lbs) of irregular additive pellets.
Processes
There are currently three tech- nologies of interest in the current market. These are E-LFT, D-LFT and S-LFT.
E-LFT is the in-line compounding and direct extrusion of long fiber reinforced thermoplastics as pro- files or sheets, while D-LFT is the in-line compounding and direct compression molding of long fiber reinforced thermoplastics. S-LFT is the inline compounding
and direct injection of long fiber reinforced thermoplastics.
All three processes use continu- ous gravimetric feeders to feed accurately into the continuously operating extruder. Long fiber thermoplastics technology uses special screw configurations for both, single and twin screw extruders.
Ingredients
The base polymer is generally fed with a single screw or vibra- tory loss-in-weight feeder. The integrated vacuum receiver is responsible for the steady refill of the LWF.
One to three additives such as colors, stabilizers, etc. in pow- der or pellet form are added via smaller loss-in-weight feeders (single or twin screwfeeders, vibratory feeders or Bulk Solids Pump feeders).
Edge trimmings and other re- cycled materials are shredded and fed back into the process at a
Long Fiber Reinforced Plastics D-LFT: Coperion Werner & Pfleiderer System
predetermined ratio using vibra- tory loss-in-weight feeders.
Fiberglass
The glass fiber filaments are pulled into the extruder from con- tinuous glass rovings on bobbins by the rotation of the screw shaft.
The throughput of the fiber is vol- umetric and quite steady. Each fiber stand is monitored by an infrared sensor. The gravimetric throughput of the fiberglass can also be checked by mounting the bobbins on scales and measuring the weight loss over time.
End Products
Most LFT end products are pro- duced for the automobile indus- try. These molded parts include body panels, sound shields, front-end assemblies, struc- tural body parts, truck panels and housings as well as doors, tailgates and fender sections. Development is also strong in other areas of application in the electrical and building industries.
This four-page technical white paper from K-Tron discusses the selection of optimised materials feeding systems for the efficient production of long-fibre- reinforced thermoplastics (LFTs).
B&P: Trivolution Tri-Kneader
This new brochure from B&P Process Equipment has details of the company’s revolutionary Tri-Kneader for demanding compounding applications, delivering uniform dispersion at lower melt temperatures.
1 Polymer pellets 2 Gravimetric feeder
3 Glass rovings 4 Motor and gearbox
5 Twin-screw compounder ZSK 6 Devolatilizing
7 Cutting unit 8 Separating unit
9 Robot 10 Press
➤ Click here to download
➤ 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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