4 edition of Quantitative in-line color monitoring of polymer color concentrates in an extruder found in the catalog.
Quantitative in-line color monitoring of polymer color concentrates in an extruder
Thesis (M.A.Sc.) -- University of Toronto, 2001.
|Series||Canadian theses = -- Thèses canadiennes|
|The Physical Object|
|Pagination||2 microfiches : negative.|
For industrial manufacturing, largely pulp and paper and textile industries, colour is often measured in the wastewater for removal purposes and effluent monitoring. Dyes and coloured organic substances are used extensively to add colour to various different substrates in the manufacturing process. COLOR CONCENTRATES. The necessary pigments needed to achieve the target color are compounded at a high concentration into a “carrier” resin that is the same as, or compatible with, the end use polymeric resin. They are used at a prescribed let-down ratio (LDR) and mixed with a polymer base to be processed into the customer’s finished parts.
StellarNet Modular Color Measurement Systems include a miniature spectrometer, light source, and accessory depending on your sample type. The StellarNet BLACK-Comet-CXR spectrometer has consistent resolution throughout nm and is a perfect low cost instrument for any color measurement application. Using color concentrates allows companies and individuals to give long-lasting, vibrant colors to plastic. The natural color of different plastic polymers can be bland and boring, which can lower desirability of a plastic product. If you are looking to create and sell plastic products, the color of the final product is extremely important.
Researchers have created an unusual polymer that can change color and return to its original color in less than a second by changing its temperature. New-polymer-changes-color-in-seconds Skip to. INTRODUCTION. The importance of esthetic in dentistry is well known. 1 It has been reported, for example, that esthetic dental restorative treatment can improve a patient’s self-esteem. 2 Initial shade matching of an uncured composite resin material to its adjacent tooth is an important clinical practice in esthetic restorative procedures, and once an appropriate match is obtained, the color.
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An inexpensive CCD spectrometer was used to quantitatively monitor, in-line, the color of the polymer melt during changeovers from pigmented polyethylene color concentrate" to purge and the reverse in a " single-screw extruder.
Excellent superposition was obtained. CONCLUSIONS An inexpensive CCD spectrometer was used to quantitatively monitor, in-line, the color of the polymer melt during changeovers from pigmented polyethylene "color concentrate" to purge and the reverse in a ' single-screw extruder.
The in-line process monitoring technique discussed here involves color measurements performed directly on the pigmented polymer melt, ideally while still in the compounding extruder. In contrast to the usual post-production methods, the in-line technique Cited by: 3.
This study was undertaken to provide a direct comparison of commercial-scale HIDM and twin screw extrusion compounding technologies for the preparation of polyolefin color concentrates. Five commercial concentrate formulations were prepared independently on a 40 liter HIDM and a 60 mm co-rotating twin-screw extruder.
development, extruder pressure build and processing time . The colour variation is due to degradation, temperature, particle size, and colorant . Screw speeds have no apparent effect on the kneading block performance . Shear forces that occur in the extruder is.
In-line Optical Techniques to Characterize the Polymer Extrusion Article (PDF Available) in Polymer Engineering and Science 54(2) February with Reads How we measure 'reads'.
QUANTITATIVE IMAGE ANALYSIS AND POLYMER BLEND COALESCENCE Sridhar Rajaram, Department of Chernical Engineering and Applied Chemistry University of Toronto ABSTRACT An objective method of conducting accurate image segmentation for the measurement of objects of interest in images obtained off-line, as well as in-line, was deveioped.
The mixture of ingredients that makes up a colorant typically constitutes 30% to 50% of a pelletized color concentrate.
The remainder is a polymer system known as a carrier resin that essentially is a binder for the colorant. Concentrates are usually added to the base resin at levels of 2 to 5 lb per lb of the natural material.
Not only do the peptides stabilise the diacetylene but they also enable the material to self-assemble into continuous fibres.
Heat disrupts the coplanarity of the polymer by introducing more. To eliminate the drawbacks of off-line color measurement, the German company COLVISTEC AG has introduced a new system for the inline measurement of color values. The inline color measurements takes place directly in the melt.
As a result, immediate intervention can take place when color variations occur. The measured results are available real time. Polymer Drying Most polymers must be dried before molding or extrusion. Over-drying of a polymer for excessive times or at excessive temperatures can cause color shifts and/or a loss in physical properties.
Part Cooling in the Mold The rate of cooling in an injection mold can affect color and appearance as well as physical properties. Instead, a fiber-optic probe inside the extruder die connected to a spectrophotometer with a CCD sensor outside the extruder provides the first commercial system for real-time, on-line monitoring of color in the melt stream.
It can eliminate the costly, labor-intensive practice of molding color plaques from pellets for quality checks. An in-line colorimeter that is able to quantify color changes in real time during extrusion was developed and validated. It is composed of LEDs emitting at three different wavelengths and a.
pigments. Iron oxide yellows give an opaque yellow color and are generally inexpensive. They are, however, sensitive to high heat (>°C) and shift toward a red color when overheated4.
Chrome yellow pigments give a bright yellow color, though their lead content limits their applicative use. n Concentrated color dyes and pigments. Cite this entry as: Gooch J.W. () Color Concentrates. In: Gooch J.W. (eds) Encyclopedic Dictionary of Polymers.
is a different color. This allows for visual identification in this experiment. Actual resins may be almost any color depending on colorants added during its initial formulation. Obtain samples of two different “unknown” polymers.
These will be small pieces of polymer, not pellets. Use of Color Concentrates Basic Colorant and Additive Production Processes: A Regulatory Compliance Perspective. Ralph A. Helfer. Search for more papers by this author. Scott D. Russell. Search for more papers by this author. Book Editor(s): Robert A.
Charvat. Search for more papers by this author. First published: 10 November https. Free Online Library: Color mixing in the metering zone of a single screw extruder: numerical simulations and experimental validation. by "Polymer Engineering and Science"; Engineering and manufacturing Science and technology, general Plastics Analysis Extrusion.
The concentrate provides a clean and convenient method of obtaining accurate color shades in extruded and molded products. The term masterbatch is sometime used for color concentrate, as well as for concentrates of other additives.
See also multifunctional concentrate. McHenry, IL: Febru Chroma Color Corporation announces today it has acquired Polymer Concentrates Inc., based in Clinton, MA. With this latest acquisition, Chroma Color continues to grow its manufacturing footprint along with its suite of colorant and additive [ ].
Chroma Color Corporation is a leading specialty color and additive concentrate supplier in the plastics marketplace with an extensive manufacturing footprint throughout the United States.
Between our experienced staff and 6 locations, we have all the technical resources necessary to match your color .Sitting atop the plastics pyramid, high temperature formulations provide robust material performance at elevated temperatures in excess of °F (°C).At PolyOne, we collaborate with both designers and manufacturers to optimize their use of these engineered polymers.
Our focus is on the development of targeted high temperature formulations and colorant and additive packages.Color Science: Concepts and Methods, Quantitative Data and Formulae (Pure & Applied Optics Series) Publisher: Wiley-Interscience; 2 edition (Septem ) Language: English Pages: ISBN: Size: MB Format: PDF / ePub / Kindle This paperback reprint of a classic book deals with all phases of light.