The SPE Library contains thousands of papers, presentations, journal briefs and recorded webinars from the best minds in the Plastics Industry. Spanning almost two decades, this collection of published research and development work in polymer science and plastics technology is a wealth of knowledge and information for anyone involved in plastics.
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New Technology in Design, Materials & Processing
Outline: • Machine – Persico Electric • Mold – 5 Gallon Water Can • Resins – MDPE & LDPE • Design • Processing • Impact Data • Conclusion
The Benefits of Automated Conveying in Rotational Molding Plants
How does craft beer relate to our industry? • Companies have the same equipment, but use it differently based on the products that their customer’s demand. • Both industries are very open and collaborative. People freely share their operational ideas and innovations. • Key characteristics are closely monitored in both industries. • Particle size distribution matters. It causes molding issues in roto, and prevents you from getting your grist into the mash in brewing. • The operational set-ups are dependent on product mix. • Both processes are hot and physically demanding. • Both industries have a limited number of raw materials, and it’s up to the designer to use those to create different and wonderful products. • Both industries have to innovate to succeed.
The Benefits of Automated Conveying in Rotational Molding Plants
Numerical Optimization Of Advanced Mixing Elements On Single Screw Extruders
In this paper, the simulation of multiple variations of mixing elements and their results are presented. It is intended to create reliable information on how rather unconventional mixing elements in comparison to standard mixing elements can help to improve melt homogeneity. Therefore, a post processing method is developed to indicate the mixing efficiency of each simulated geometry. Finally, a conclusion is given recommending certain geometry parameters to optimize individual mixing elements.
Requirements For Medical Plastics - Launch Of New Guideline
Safety for patient and user is an essential requirement for medical products. Subsequently, plastics grades used in medical have to fulfil particular requirements, i.e. constant properties, formulation lock or biocompatibility. Surprisingly, no standard has existed to define the requirements for medical grades so far. This gap has been filled recently by the new guideline VDI 2017 developed and launched by a work group of the German Engineer’s Society (VDI). This article addresses the development of the new guideline and presents the essential requirements to be covered by a medical grade.
Characterization Of Recycled Polymer Compound By Thermal Analysis
Thermal analysis techniques, such as DSC, TGA, DMA and TMA are commonly used in polymer characterization. In this paper these techniques with the help of Identify, a database search software, are used to characterize recycled polymer compounds for preselection.
High Density Polyethylene Blends For Additive Manufacturing
High density polyethylene is challenging to use in standard additive manufacturing methods today, but would provide desirable properties such as chemical resistance, lightweighting, and durability to enable applications beyond prototyping. In this work, we describe high density polyethylene blends with highly branched polyethylene or polyethylene copolymers that improve adhesion and reduce warpage, significantly improving printability in standard filament extrusion 3D-printing methods.
High Shear Capillary Rheometry Of Cellulose Nanomaterials For Industry Relevant Processing
The effects of high-shear flow on cellulose nanocrystals (CNCs) are studied to demonstrate potential impacts of industrial processing. A microcapillary rheometer was used to characterize the shear thinning characteristics of CNCs at diverse concentrations. Shear thinning characteristics follow the Sisko model which allows reduction of the data onto time-concentration superposition master curves. Shift factors follow a Williams-Landel-Ferry-like (WLF) relationship.
Crosshatch Tape-Adhesion Test For Multi-Layer Films Using Scratch Machine
Each model film is made in machine direction orientation and consists of two types of polyolefin; For some model films, a different compatibilizer was used; Each model film has a structure of ‘ABCBA’. Here, B is a tie layer; The thickness of the model films is from 2 mil to 2.5 mil, and the thickness of the skin layer is from 5 to 10%.
Sustainable Polyamide Compounds
Value added cost effective and sustainable polyamide 6 and 66 compounds were prepared by incorporating 10 to 30% recycle content without significantly sacrificing physical properties. This was achieved by reactive extrusion with chain extending additives to couple low molecular weight chains in recycled feed streams. Three types of chain extending additives with different functionalities were evaluated in this study. Based on the performance and cost, one of the chain extending additive was identified as the best option.
Advancements In Decorative Pvd Chromium Coatings For Polymer Substrates
Environmentally friendly PVD on plastics for automotive decoration are rapidly gaining acceptance. They replace galvanic processes, eliminating their toxic process and waste stream for plating on plastic (POP). VTI’s SuperChrome has already received approvals from Daimler and PSA. Part design for PVD, polymer selection, and available range of color and appearance will be discussed. OEM specifications based on testing, unique to PVD and distinct from both electroplate and painted surfaces are required.
Effect Of Polypropylene Chain Branching On Melt Blown Process Stability
In this work, linear polypropylene (L-PP) and longchain branched polypropylene miscible blend (LCB-PP), both having comparable weight average molecular weight, zero-shear viscosity and polydispersity index, were used to produce nonwovens via melt blown technology in order to understand role of long chain branching on the fiber diameter distribution.
The Importance Of Chemical Stabilization In Recycled Material For Corrugated And Conduit Polyolefin Pipes
Much attention has been given to stabilization packages for polyolefin pressure pipes over the past couple decades, however corrugated and conduit pipes have generally been ignored with respect to more robust stabilization packages. Certain groups such as the Florida Department of Transportation have set rules establishing oxidative resistance in HDPE corrugated pipes, but few others have followed this example. A discussion of the simplicity and importance of pipe resin stabilization as well as examples from stabilized pipes will be covered.
The Benefits Of Farrel Continuous Mixing (Fcm(Tm)) Technology In Processing Polylactide (Pla) Compounds
Continuous mixing technology was first developed in the early 1960’s in an effort to create continuous rubber processing traditionally done in batch form. Due to the method of melting and mixing in a highly efficient manner, it has found a niche in highly filled or shear sensitive mixing/compounding applications. Polylactide resins are shear and temperature sensitive polymers that can benefit from continuous mixing technology in both neat and compounded processing applications.
Elmar Moritzer, Johannes Hillemeyer
Screw blind riveting combines plastic direct screwing with blind riveting. The new joining element can be integrated in the injection molding process of any injection-molded component. To qualify the element for industrial application, reduction factors for different sizes, geometries, environmental influences and long-term strength are determined. This paper focuses on the shear tensile strength of the screw blind rivet to allow engineers to design products and make this technology, comparable to conventional riveting in appropriate applications.
Extremely Low Emission Polyoxymethylene For Automotive Interior Parts
This paper presents the results of new extremely low emission (XLE) POM and low emission and improved odor PP long fiber reinforced thermoplastics (LFRT). The results highlight emissions that meet the current VOC requirements. Additionally, the products have significant improvement in odor and meet global demands.
Direct Joining Of Polytetrafluoroethylene And Polyamide To Steel Via Use Of Surface Treatment
The need to be able to directly join polymers to metals is growing. For example, in the drive to make batteries smaller, more energy efficient, longer lasting, and less expensive to manufacture, direct joining of polymers to metals offers many benefits. In this work, the use of a unique, commercially available, surface treatment method has been investigated as a potential method of making direct joining feasible.
Disinfectant Resistant Materials For Medical Devices
Against a background of increasingly aggressive disinfection protocols being used in the medical sector, there is a compelling need for improved chemically resistant thermoplastics for medical device housings. We describe the development of exciting new materials, leveraging SABIC’s LNP™ copolymer technology to step beyond the performance of existing materials, such as polycarbonate and polybutylene terephthalate, showing compatibility with the most aggressive disinfectants currently in the market.
Flexil ‚Äì A Novel Soft Touch Thermoplastic Elastomer
Flexil®, a polymeric modifier can be used to uniquely tune and modify various types of elastomers and polymers. The versatility of Flexil creates a new platform for engineers to slightly tune their matrix polymer without sacrificing the inherent performances for a variety of end applications.
Injection Molding Processing Of Bio-Based & Bio-Filled Resins
Injection molding with bio-based and/or bio-filled resins is becoming more commonplace as the plastics industry responds to the environmental and sustainable desires of the economy. This paper presents some intricacies of part design and processing developments when injection molding with bio-based and bio-filled resins.
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