The selection of the design parameters of the screw and the operating conditions of the process. Currently, 50% of the new drug candidates are speculated. Hot melt extrusion technology, approach of solubility. Hot melt extrusion applies heat and pressure to melt a polymer and force it through an extruder in a continuous process. Process technology of hot melt extrusion hme hot melt extrusion technique was first invented for the manufacturing of lead pipes at the end of the eighteenth century. Pdf book hot melt extrusion pharmaceutical applications. Pharmaceutical applications is an essential multidisciplinary guide to the emerging pharmaceutical uses of this processing technology for researchers in academia and. In this chapter, the hotmelt extrusion to date hme has emerged as a. University of groningen innovative platform technologies for. Hot melt extrusion pharmaceutical applications is an essential multidisciplinary guide to the emerging.
Introduction process via quality control measurements during active extrusion process 6. Extrusion hme since the industrial application of the extrusion process back in the 1930s, hme has received considerable attention hot melt extrusion technique was first invented for the from both the. Downstream processing from hot melt extrusion towards tablets. During the developmental process, there is an estimated 40 to 70% incidence of delay or failure for new drug entities due to poor biopharmaceutical properties such as poor solubility, poor permeability and poor chemical stability. Hydrostatic extrusion the billet is smaller in diameter that the chamber, which is filled with a fluid and the pressure, is transmitted to the billet by a ram. Inline determination of residence time distribution in hotmelt. Many of these systems are directed toward the solubilization and delivery of poorly soluble bioactives via hot melt extrusion technology, which is a primary focus of his research. Hot melt extrusion is a versatile tool that can be used in modern drug formulation development. A greater degree of conveying and much shorter residence times are achievable with an. The role of polymer excipients in hot melt extrusion a.
Hot melt extrusion in the pharmaceutical and food industries. Melt extrusion to improve the solubility of drugs mengyao zheng, finn bauer, gudrun birk, dieter lubda 1 methods poorly watersoluble apis classified as biopharmaceutics classification system bcs ii class. Modern ceramic engineering free download as pdf file. Melt extrusion materials, technology and drug product. Process technology to pharmaceutical products find, read and cite all the research you need on. Over the last three decades industrial adaptability has allowed hotmelt extrusion hme to gain wide acceptance and has already established its place in the. Repkas most important scientific accomplishments involve the advancement of melt extrusion. Troubleshooting the extrusion process hanser publications. The screw design chosen will determine the ultimate performance of the extrusion system and is rightly considered the heart of the extrusion process. Hot melt extrusion hme is the process of applying heat and pressure to melt a polymer and forcing it through an. From process to pharmaceutical applications 7 equivalent from a processing perspective. In the hot melt extrusion process, the api and the excipients are fed into the extruder. Process based monitoring watches production process conditions such as melt. Compounding extrusion is a process that mixes one or more polymers with additives to give plastic compounds.
Hot melt extrusion pharmaceutical applications ebook library publishing jan 23, 2020. We have extensive knowledge in the areas of process technology. The commonly used melt indexer provides only limited information on the melt viscosity. Single screw extruder an overview sciencedirect topics. Rheological behaviour of polypropylene through extrusion and capillary rheometry 31 currently there are numbers of methods and instruments available to measure the rheological data of polymers. Understanding melt extrusion processes by simulation. Hot melt extrusion hme is the processing of polymeric materials above their glass transition temperature tg in order to effect molecular level mixing of. Since pp is a pseudoplastic thermoplastic fluid that requires relatively high processing temperatures to achieve suitable melt.
Hot melt extrusion drug manufacturing twin screw extruders. Of course, melt strength determines how easily a melt. The feeds may be pellets, powder andor liquids, but the product is usually in pellet form, to be used in other plasticforming processes such as extrusion. Hot melt extrusion hme is a promising technology for the production of new chemical entities in the developmental pipeline and for improving products already on the market. Process analytical technology pat can be viewed from many perspectives.
The extruder, by its nature, is a continuous instrument, so, it lends itself to continuous production. The true potential of hotmelt extrusion for pharmaceutical applications is just. Hot melt extrusion hme is the process of applying heat and pressure to melt a polymer and force it though an orifice in a continuous process. Hot melt extrusion manufacturing process melt extrusion is an excellen t process to formulate poorly soluble drugs and to improve bioavailability advantages vs spray drying continuous process choice of an appropriate polymer is crucial for the formulation and the process most important polymer features aretg and melt. This variable governs the melt viscosity achieved by the material in an extrusion process. Scaleup of a hot melt extrusion process thermo fisher scientific. Hot melt extrusion is a complex process, as it involves an assembly of different screw elements forward element, reverse element, kneading block to manufacture the end product. Bioavailability enhancement using hot melt extrusion with.
Generally, shorter extruders will result in a lower melt. A screw is fitted into this cylinder with a specific geometry determined by the polymer and the desired thermal condition of the melt. What is melt extrusion and how does it help us make new. Polyvinyl alcohol in hot melt extrusion to improve the.
In the 1980s, basf became the first company to apply it to the production of pharmaceuticals for enhancing the solubility and bioavailability of poorly soluble actives. Coating a host of factors can influence successful tablet coating. Purpose the aim of this paper is the development of a process control concept for a hot melt extrusion hme and pelletization process. The technology itself can be described as a process in which a material melts or softens under elevated temperature and pressure and is forced through an orifice by screws. Inline monitoring of a hot melt extrusion process by near infrared spectroscopy andreas gryczke, chris heil, dirk leister, scott martin. Hotmelt extrusion with poorly soluble drugs heinrichheine. Hot melt extrusion technology has gained considerable popularity in the pharmaceutical industry due to the advantages it offers over traditional manufacturing techniques and provides an efficient production process. Extrusion process an overview sciencedirect topics. Process monitoring during extrusion both process based monitoring and productbased monitoring are used to achieve product improvements. Melt extrusion process are currently applied in the pharmaceutical field for the manufacture of a variety of dosage forms and formulations such as granules, pellets. Process parameters for successful scaleup of a hot melt extrusion. In this chapter, the hotmelt extrusion to date hme has emerged as a novel.
The extrusion process is a multivariable system where product qualities e. Downstream processing from hotmelt extrusion towards. Rheological behaviour of polypropylene through extrusion. Hot melt extrusion hme is a suitable process to produce a wide range of pharmaceutical dosage forms, like tablets, capsules, lozenges or implants. Appropriate thermoplastic behavior is a prerequisite of any polymer to be used in hot melt extrusion. Institute of solids process engineering, tu dortmund university, dortmund 44227.
This continuous pharmaceutical process can be performed below the glass transition temperature. Hot melt extrusion hme is the process of applying heat and pressure to melt a polymer and forcing it through an orifice in a continuous process. Formulation overview of common excipients and their designed functions. Different working principles of extrusion exist, whereas screw extrusion is mainly applied in pharmaceutical processing. A basic singlescrew extruder consists of three polymers are melted and formed. Hot melt extrusion process design using process analytical technology.
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