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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Common Installation Failure Modes for In-Service Plastic Piping Components and Systems
Plastic pipe components are generally constructed into high integrity, high durability systems. However, some poor installation practices occur with sufficient frequency that they have been noted by the authors as recurring in root cause failure analyses. These installation based root causes differ with the application environment and the material of construction. This paper will address poor installation practices for polyethylene, poly vinyl chloride and chlorinated poly vinyl chloride based piping systems.
Innovative Waterborne & UV Resins for Plastics & Automotive Interior Applications
Innovative Waterborne & UV Resins for Plastics & Automotive Interior Applications
Wetting Measurements for Rapid Qualification of Surface Preparation Processes
Surface treatments of metals and polymers are frequently necessary to control properties such as adhesion of paints and sealants. Because surface properties are determined by only the uppermost few molecular layers, measuring these properties in manufacturing environments can be challenging. Water contact angles can be obtained very rapidly and conveniently and provide sensitive, quantitative feedback of surface properties important for adhesion.
Ensure Safe Operation of the GRP Lining Between Overhaul Period
Application of the electrical resistant and diffusion laws is effective way of the estimation of the ensure safe operation of the GRPL between overhaul periods and increase reliability of the technological equipment of concrete, steel or high filler plastic.
Determination of Thermal Conductivity for Industrial Applications
The thermal conductivity of various thermally conductive thermoplastics commercially available was determined experimentally and is compared with da-tasheet values. It was found that in most cases the thermal conductivities in-plane and through-plane deviate substantially from the manufacturers' values. The rea-sons as different measurement methods, part geometry and specimen preparation are discussed in detail in this paper. Finally the use of standardized methods is recommended.
Thermal and Morphological Behavior of PLA/PBS/CSW Blends Processed by Vane Extruder
This work focused on the study of thermal and morphological behavior of degradable poly(lactic acid) (PLA) and poly(butylene succinate) (PBS) and Calcium Sulfate Whiskers (CSW) blends processed by Vane extruder, which is a novel equipment for polymer processing. Different from the shear force field of traditional Screw extruder, the blends produced in elongation force field of Vane extruder were investigated through analytical techniques correlated to their morphology and thermal properties.
Novel Poly (Lactic Acid) Based Emulsion
ANTEC 2013 Technical Paper - Biodegradable and biomass base polymers are gaining attention from the view of environmental concern. In this report, novel poly (lactic acid) based multibranched polymers self-emulsified in 100 % water are described.
Comparison between Non-Isothermal Growth Rates of Nodular and Spherulitic Structures of Isotactic Polypropylene
Non-isothermal crystallization growth rates of isotactic Polypropylene were determined by Polarized Light Microscopy. For molten isotactic Polypropylene with temperatures <195°C and above its melting temperature, nodules and spherulites morphological formations were obtained from a melt crystallized non-isothermally at different cooling rates. The results show non-linear growth rates for both morphological formations while the spherulite growth rate is higher than the nodule.
Analysis of Organic Colorants in Plastics
The use of analytical techniques for analyzing organic colorants in plastics is described. These include spectroscopic and chromatographic techniques such as mass spectrometry(MS), visible spectroscopy (UV-Vis), FTIR, and high performance or ultra performance liquid chromatography (HPLC, UPLC).
Flex Barrier Property Enhancement in Film Structures Using Microlayer Coextrusion Technology
Microlayer coextrusion is a process in which two or more polymers are extruded and joined together in a feedblock or die to form a single structure with multiple layers. This paper describes a multilayer coextrusion process technology to maintain the gas barrier property of Ethylene Vinyl Alcohol (EVOH) barrier films after flexing.
Integrated Process Monitoring and Process Control of Injection Molding Machines and Molds
The injection molding process is often exposed to a wide variety of influences that lead to variations in the required product quality. Today there are separate control loops for the machine and the mold. Each system is operated standalone" which leads for example to higher mold and melt temperatures and longer cycle times. The approach is to couple the control of the injection unit with the temperature control of the mold to gain energy efficiency in the overall process."
2PC-Recu-Module for Energy Recovery at Hydraulic Driven Injection Molding Machines
In contrast to electrically driven injection molding machines, for hydraulically driven machines energy recovery during the breaking process of the single axis is not state of the art. Particularly in these cases there is the highest capability for energy recuperation. For this reason a new hydraulic drive module has been developed, which is able to recover the kinetic energy of the clamping unit. In this paper the results of the model based investigations are shown.
Blow molding of solid silicone rubber
Complex hollow parts made of thermoplastics are often produced in the extrusion blow molding process. This cost-efficient production technique with a high reproducibility, a high degree of automation and short cycle times has not been adapted for rubber processing until now. At the Institute of Plastics Processing (IKV) preliminary investigations show the potential for processing solid silicone rubber in blow molding. The blow moldability of solid silicone rubber is analysed thoroughly and a prototype blow molding machine will be built to examine the processing behavior of the adapted material.
Development of a Foaming Technology to Produce Polyurethane Molded Foam Parts Using Co2 as Blowing Agent
The existing technologies to foam polyurethane (PU) in a discontinuous molding process show all several disadvantages regarding to the achievable foam properties. At the Institute of Plastics Processing (IKV) a physical foaming process has been developed that allows to foam PU molded parts using CO2 as a blowing agent. Two different methods which enable a controlled dissolving process of CO2 out of the reaction mixture and con?sequently a homogenous cell structure have been investigated.
Analysis of Sustainability-related Web Content for General and Medical Plastics Packing Firm
The purpose of this study is to determine how plastic-packaging companies define sustainability or sustainable practices and communicate sustainable practices to its target audience e.g., customer, consumer. There are two research questions this study intends to answer. First, how do such companies define sustainability or sustainable practices, and second, what persuasive appeals are used to communicate sustainable practices to their audiences via a company website?
Influence of the Melting Zone on Compounding of Cellulose Fiber Reinforced Polylactide
The compounding of natural fiber composites (NFC) requires a preferably low melt temperature to prevent thermal damage from the fibers. In this test series the influence of the melting zone and the role of melt temperature by addition of natural fibers on compound properties are examined.
Ultrahigh Flow Liquid Crystal Polymer
A new flow improvement technology (FIT) including reactive extrusion and Ticona’s proprietary compounding technology enables a high flow liquid crystal polymer (LCP) with lower warpage. LCP polymer chain and its molecular weight distribution were tailored via reactive extrusion, while filler length was also controlled via the compounding technology. As a result, this technology makes it possible to improve product flowability, warpage, surface smoothness, and weldline strength for electrical and electronic devices.
Prediction of Ejection Forces Using Combination of Mold Filling and Mechanical Simulations
The paper deals with the prediction of the force required to eject thermoplastic moldings from an injection mold using a combination of mold filling and mechanical simulations. It demonstrates that ejection forces are strongly dependent upon geometrical parameters of the moldings and design of the mold and that simple formulas are not adequate for prediction of the ejection forces.
The Extrusion Forming Technology of PMMA Light Guide Plate with Micro-Structure
The purpose of this article is to study the continuous manufacturing process for PMMA sheet with micro-structures transferred on its surface, and also the influences of the process parameters on the transfer ratio of the micro-structure. The micro-structured sheet with optical features can serve as a novel type light guide plate (LGP) which enhances the image quality of a LCDTV by increasing the contrast ratio and reducing the motion blur.
Cross Metathesis of Olefin Terminated Polypropylene and Polydimethysiloxane iin the Melt Phase
Vinyl terminated polypropylene (PP) and mono-vinyl terminated polydimethylsiloxane (PDMS) have been reacted in the melt phase with Grubbs second generation catalyst to, synthesize PDMS modified PP copolymers. Some chemical, physical and rheological properties of produced materials are determined and the results indicated the feasibility of cross metathesis (CM) reaction in melt phase.
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